The present invention relates to a hot-air handheld device (1) for generating a hot air flow (32), having a housing (10) with a handle part (11); a hot-air blower (20) arranged in the housing (10); an unlocking button (41) for unlocking the hot-air handheld device; and a start button (42) for activating the hot-air blower (20); wherein the hot-air handheld device device (1) is designed to activate the hot air blower (20) selectively in a first operating mode or a second operating mode when the start button (41) is pressed. The present invention also relates to a corresponding method (100) for operating a hot-air handheld device (1).
B25F 5/02 - Structure des boîtiers, corps ou poignées
F24H 3/04 - Appareils de chauffage d'air à circulation forcée l'air étant en contact direct avec l'agent chauffant, p. ex. élément chauffant électrique
A hand-held hot air device is provided with a housing for at least a fan, a control device, actuating elements and a display and operating device as well as a heating tube arranged at the housing with an integrated heating element and temperature sensor, characterized in that in the control device as a function of a plurality of different air guide options for the hot air emerging from the heating tube after the heating tube there are provided calibration curves, wherein the hand-held hot air device with the control device is configured to, after setting the respective air guide at the outlet from the heating tube, output the air temperature at the location corresponding with the air guide on the display in accordance with the calibration curve of the air guide. Further, a corresponding method for operating a hand-held hot air device is provided.
F24H 15/37 - Commande de moyens de production de chaleur dans les appareils de chauffage d’appareils de chauffage électriques
F24H 3/04 - Appareils de chauffage d'air à circulation forcée l'air étant en contact direct avec l'agent chauffant, p. ex. élément chauffant électrique
F24H 9/00 - APPAREILS DE CHAUFFAGE DE FLUIDES, p. ex. DE L'AIR OU DE L'EAU, COMPORTANT DES MOYENS DE PRODUCTION DE CHALEUR, p. ex. DES POMPES À CHALEUR, EN GÉNÉRAL Parties constitutives
F24H 15/208 - Température de l’air après chauffage
3.
Device, method and movable joining apparatus for thermal joining respectively two adjacent material sheets over a connecting piece
A device, a method and a movable welding apparatus for thermal joining of respective two material sheets over a connecting piece arranged areally on a bottom side, wherein the material sheets are arranged with a respective side surface facing one another abutting against each other at least partially with a respective bottom side lying areally on a top side of the connecting piece are provided. In particular, the two material sheets and the connecting piece can be joined together in one pass.
An automatic welding machine for thermally joining sheets of material, in particular for edge-side joining of an overlapping upper material sheet to a lower material sheet, to be connected to one another in a materially bonded manner under the effect of heat and subsequent application of pressure, is provided comprising: a heating device for at least partially heating the material sheets to be joined in a connection region; a chassis comprising a pressure roller, configured to apply pressure to the material sheets in the working direction behind the heating device; a mount for one or more additional weights configured to increase a pressure on the pressure roller; and a weight sensor for measuring a weight force caused inter alia by the one or more additional weights in the mount, which acts at least partially on the pressure roller. Further a corresponding method is provided.
An automatic welding machine for thermally joining sheets of material, in particular for edge side joining of an overlapping upper material sheet to a lower of material sheet, to be connected to one another in a materially bonded manner under the application of heat and subsequent application of pressure, is provided comprising: a heating device for at least partially heating the material sheets to be joined in a connection region; a support frame with a housing; a pressure roller; at least two traveling rollers; wherein the pressure roller and the traveling rollers are arranged on the support frame and together with the support frame form a chassis, wherein the chassis comprises a longitudinal axis and a transverse axis perpendicular thereto, which span a chassis plane; wherein at least a first travelling roller of the two travelling rollers and/or the heating device is arranged to be movable by a telescopic pull-out relative to the support frame in directions parallel to the transverse axis; wherein the first travelling roller and the heating device are with respect to a longitudinal center of the chassis arranged on opposite sides of the chassis. Further a corresponding method is provided.
A pyrometer device for temperature determination in laser plastic welding is provided, wherein the pyrometer device comprises: a first fiber connector for a first optical fiber; a second fiber connector for a second optical fiber; and a radiation temperature sensor; wherein the pyrometer device is adapted to forward process laser radiation received via the first fiber connector to the second fiber connector and output via the second fiber connector; wherein the pyrometer device is adapted to forward thermal radiation received via the second fiber connector to the radiation temperature sensor. Further a system for laser plastic welding with a laser beam source, process optics, and a fiber-coupled pyrometer device is provided.
The invention relates to a hot air handheld device (1) comprising a housing (2) for accommodating at least one fan (6), a control unit (11), actuation elements and a display (4) and operating device, as well as a hot air tube (7) located on the housing (2) and having an integrated heating element (9) and temperature sensor (12), characterised in that, calibration curves are stored in the control unit (11) upstream of the hot air tube (7) according to a plurality of different airflow options for the hot air exiting the hot air tube (7), such that, after determining the respective air flow, after exiting the hot air tube (7), the control unit (11) outputs the air temperature at the point corresponding to the airflow on the display (4) in accordance with the calibration curve of the airflow. The invention also relates to a corresponding method for operating a hot air handheld device (1).
F24H 9/20 - Disposition ou montage des dispositifs de commande ou de sécurité
F24H 3/04 - Appareils de chauffage d'air à circulation forcée l'air étant en contact direct avec l'agent chauffant, p. ex. élément chauffant électrique
11.
HOT WEDGE WELDING DEVICE FOR THE SURFACE-TO-SURFACE CONNECTION OF SEALING SHEETS TO A BASE AND/OR TO A SUBSTRATE
The present disclosure relates to a mobile welding device (1) for the surface-to-surface connection of a sealing sheet to a base and/or to a substrate, comprising: - at least one carrier frame assembly (2), which can be moved on the base and/or on the substrate; and - an electric heating-wedge heating apparatus (13), which extends between two opposite longitudinal sides of the carrier frame assembly in a transverse direction; wherein the electric heating-wedge heating apparatus (13) has at least one heating cartridge, to which electric current can be supplied and which has a heating-cartridge preferred longitudinal axis parallel to the transverse direction, and at least two heating wedges, which have a blunt end and a pointed end, the heating wedges being disposed on the heating cartridge such that the heating wedges are spaced apart along the heating-cartridge preferred longitudinal axis (10).
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
A system for joining at least two workpieces of thermoplastic material by laser transmission welding, the system comprising at least one device for generating laser radiation and an imaging optics having a first optical axis, wherein laser radiation emitted by the device for generating laser radiation is guided into a joining zone and wherein the imaging optics is configured for optical imaging from a joining plane in the joining zone to a detection plane of a radiation detecting device. According to an aspect, a deflection mirror is arranged at a coupling point on a second optical axis running parallel to the first optical axis for deflecting the laser radiation from an entrance axis enclosing a non-zero angle, preferably a right angle, with the second optical axis into a direction along the second optical axis.
A ceramic heating resistor to be arranged in a tubular element of an electrical heating element for heating a fluid, preferably air, wherein the heating resistor can be produced by sintering a green body comprising at least one ceramic raw material. The heating resistor includes an electrically insulating component and an electrically conducting component, and the electrically insulating component forms a matrix in which the electrically conducting component is accommodated. An electrical heating element for heating a fluid, preferably air, including at least one tubular element, through which a fluid flows or can flow, and to a device for heating a fluid, preferably air, including at least one such heating element.
H01C 3/14 - Résistances métalliques fixes en fil ou en ruban, p. ex. bobinées, tressées ou en forme de grille l'élément résistif étant formé de plusieurs spires ou boucles enroulées en spirale, en hélice ou en forme de tore
H01C 3/16 - Résistances métalliques fixes en fil ou en ruban, p. ex. bobinées, tressées ou en forme de grille l'élément résistif étant formé de plusieurs spires ou boucles enroulées en spirale, en hélice ou en forme de tore comprenant plusieurs éléments enroulés distincts ou plusieurs configurations d'enroulement
H05B 3/14 - Éléments chauffants caractérisés par la composition ou la nature des matériaux ou par la disposition du conducteur caractérisés par la composition ou la nature du matériau conducteur le matériau étant non métallique
H05B 3/42 - Éléments chauffants ayant la forme de tiges ou de tubes non flexibles
C04B 35/18 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base de silicates autres que l'argile riches en oxyde d'aluminium
H05B 3/18 - Éléments chauffants caractérisés par la composition ou la nature des matériaux ou par la disposition du conducteur le conducteur étant enrobé dans un matériau isolant
H05B 3/24 - Éléments chauffants ayant une surface s'étendant essentiellement dans deux dimensions, p. ex. plaques chauffantes non flexibles le conducteur chauffant étant autoportant
A laser joining method and device includes a pressure-applying clamping device, which presses a first and a second workpiece against one another at least after the workpieces have been locally plasticized, and a mask having mask structures, which allow laser light to pass only in the region of the bonding contact faces, wherein at least the workpiece facing the laser source is formed by a three-dimensional molded part, which is not planar at least on the first contour side facing the clamping element and/or on the second contour side facing the second workpiece, and wherein the clamping element, with the bearing side thereof for the first workpiece, is adapted to the first contour side of the first workpiece. The mask structures are created on the bearing side of the clamping element facing the first workpiece or on the second contour side of the first workpiece facing the second workpiece.
B23K 26/57 - Travail par transmission du faisceau laser à travers ou dans la pièce à travailler le faisceau laser entrant dans une face de la pièce à travailler d’où il est transmis à travers le matériau de la pièce à travailler pour opérer sur une face différente de la pièce à travailler, p. ex. pour effectuer un enlèvement de matière, pour raccorder par fusion, pour modifier ou pour reformer le matériau
B23K 26/324 - Assemblage tenant compte des propriétés du matériau concerné faisant intervenir des parties non métalliques
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
A contact welding heating component and to an automatic welding machine for plasticizing the edges of thermally fusible/meltable material sheets disposed so as to overlap at least partially. A roughening device for the material sheets, which is disposed upstream of the trailing-material edge of the heating component in the direction of movement of the contact welding heating component, protrudes beyond the upper side of the heating component and/or the lower side of the heating component, wherein the roughening device extends transversely to the direction of movement of the contact welding heating component, adjoining the trailing-material edge of the heating component, and includes a number of sharp-edged raised roughening elements extending in the direction of movement of the contact welding heating component, preferably having a variable height in the direction of movement of the contact welding heating component. The automatic welding machine includes a contact welding heat component thus designed.
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
E04D 15/04 - Équipement ou outils de couvreur pour couvertures en plaques, feuilles ou matériaux flexibles
The invention relates to a ceramic heating resistor (1) for arranging in a tubular element (8) of an electrical heating element (9) for heating a fluid, preferably air. The heating resistor (1) can be produced by sintering a green body having at least one ceramic raw material. The heating resistor (1) has an electrically insulating component and an electrically conductive component. The electrically insulating component forms a matrix, in which the electrically conductive component is held. The invention further relates to an electrical heating element (9) for heating a fluid, preferably air, comprising at least one tubular element (8), through which a fluid flows or can flow, and to a device (17, 19) for heating a fluid, preferably air, comprising at least one such heating element (9).
H05B 3/14 - Éléments chauffants caractérisés par la composition ou la nature des matériaux ou par la disposition du conducteur caractérisés par la composition ou la nature du matériau conducteur le matériau étant non métallique
H05B 3/18 - Éléments chauffants caractérisés par la composition ou la nature des matériaux ou par la disposition du conducteur le conducteur étant enrobé dans un matériau isolant
H05B 3/28 - Éléments chauffants ayant une surface s'étendant essentiellement dans deux dimensions, p. ex. plaques chauffantes non flexibles le conducteur chauffant enrobé dans un matériau isolant
H05B 3/48 - Éléments chauffants ayant la forme de tiges ou de tubes non flexibles le conducteur chauffant enrobé dans un matériau isolant
H05B 3/24 - Éléments chauffants ayant une surface s'étendant essentiellement dans deux dimensions, p. ex. plaques chauffantes non flexibles le conducteur chauffant étant autoportant
H05B 3/42 - Éléments chauffants ayant la forme de tiges ou de tubes non flexibles
H01C 17/065 - Appareils ou procédés spécialement adaptés à la fabrication de résistances adaptés pour déposer en couche le matériau résistif sur un élément de base par des techniques de film épais, p. ex. sérigraphie
C04B 35/58 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base de non oxydes à base de borures, nitrures ou siliciures
F24H 3/04 - Appareils de chauffage d'air à circulation forcée l'air étant en contact direct avec l'agent chauffant, p. ex. élément chauffant électrique
C04B 33/26 - Fabrication de porcelaine ou de faïence de porcelaine particulière pour isolation électrique
C04B 35/19 - Aluminosilicates de métaux alcalins, p. ex. spodumène
25.
HEATING COMPONENT FOR CONTACT WELDING AND AUTOMATIC WELDING MACHINE
The invention relates to a heating component for contact welding and to an automatic welding machine for the edge plastification of material webs that are thermally fusible/meltable and arranged at least in an partially overlapping manner. A napping device (7, 7') for the material webs protrudes over the top of the heating component (13) and/or the bottom of the heating component (13'), which napping device is arranged before the material discharge edge of the heating component (8) in the movement direction of the contact welding heating component (2), wherein the napping unit (7, 7') extends adjacent to the material discharge edge of the heating component (8) transversely to the movement direction of the contact welding heating component (2) and has a number of elevated, sharp-edged napping elements (9) running in the movement direction of the contact welding heating component (2), said napping elements preferably being of varying height in the movement direction of the contact welding heating component (2). The automatic welding machine has a contact welding heating component of this kind.
B29C 65/10 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec des gaz chauds
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
B29K 23/00 - Utilisation de polyalcènes comme matière de moulage
A drive system for driving an automatic welding machine for joining the edges of sealing sheets, comprising pressing/advancing rollers located vertically opposite one another and driven by a shared drive motor, downstream of which a transmission gear mechanism is connected, and an upper pressing/advancing roller is disposed rotatably about a roller rotational axis on a tensioning arm of the automatic welding machine, which is pivotable about a tensioning arm axis, and a lower pressing/advancing roller is disposed rotatably about a roller rotational axis on a frame of the automatic welding machine, which is supported by at least two drive rollers, wherein the drive motor and the transmission gear mechanism are rigidly attached to the frame, and the drive motor comprises a motor armature including a protruding rotational shaft, and the transmission gear mechanism comprises a rotatable protruding input shaft and output shaft.
B29C 65/74 - Assemblage d'éléments préformésAppareils à cet effet par soudage et découpage
B29C 65/78 - Moyens pour la manipulation des éléments à assembler, p. ex. pour la fabrication de récipients ou d'objets creux
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
29.
Laser joining method and laser joining device for fusing workpieces
A laser joining method and device includes a pressure-applying clamping device, which presses a first and a second workpiece against one another at least after the workpieces have been locally plasticized, and a mask having mask structures, which allow laser light to pass only in the region of the bonding contact faces, wherein at least the workpiece facing the laser source is formed by a three-dimensional molded part, which is not planar at least on the first contour side facing the clamping element and/or on the second contour side facing the second workpiece, and wherein the clamping element, with the bearing side thereof for the first workpiece, is adapted to the first contour side of the first workpiece. The mask structures are created on the bearing side of the clamping element facing the first workpiece or on the second contour side of the first workpiece facing the second workpiece.
B23K 26/57 - Travail par transmission du faisceau laser à travers ou dans la pièce à travailler le faisceau laser entrant dans une face de la pièce à travailler d’où il est transmis à travers le matériau de la pièce à travailler pour opérer sur une face différente de la pièce à travailler, p. ex. pour effectuer un enlèvement de matière, pour raccorder par fusion, pour modifier ou pour reformer le matériau
B23K 26/324 - Assemblage tenant compte des propriétés du matériau concerné faisant intervenir des parties non métalliques
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
A portable table top welder for welding plastic material webs, the portable table top welder including a frame including a carrier housing and a support arm at which a welding device is arranged; at least one transport roller including a rotatable transport roller axle and at least one contact pressure roller that is rotatably supported at the carrier housing, wherein a weight is arranged at an eccentrical element which is rotatably connected at one side by a concentrically supported eccentrical element axle at the carrier housing and rotatably connected at another side by an eccentrically supported contact pressure roller axle at the contact pressure roller. The table top welder handles and transports easily and can be mounted on a table or on another carrier structure in a disengageable manner.
B29C 65/10 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec des gaz chauds
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B29C 65/78 - Moyens pour la manipulation des éléments à assembler, p. ex. pour la fabrication de récipients ou d'objets creux
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
An automatic bonding apparatus and a method for thermally induced seam bonding of weldable and/or gluable flat flexible material layers with each other which are each configured as a material web, material band and/or material piece and arranged so that they overlap at least partially wherein the bonding is performed by an electrically controlled contact heating arrangement through a heating wedge welding method. A temperature and/or a power of the heating wedge which is formed by a thin folded steel sheet blank is controlled as a function of a relative velocity between the material layers and the automatic bonding apparatus. This is performed so that a thermal energy that is transferred from the heating wedge to the material layers to be glued is kept constant. For this purpose the relative velocity is detected and the power of the heating wedge is automatically adjusted when the relative velocity changes.
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
An automatic welding machine, comprising a supporting frame and a tensioning device for reversibly joining at least two opposing booms to one another and applying a tension force between these, having an open position in which the opposing booms are separated from one another by a gap and a closed position in which the opposing booms are joined to one another and braced with respect to one another. One boom is mounted in a torsion-proof manner on the tensioning device and is pivotable in relation to the other boom and can be moved out of the open position into the closed position by the pivoting of the tensioning device. The tension force is generated by way of a spring-loaded element disposed on the tensioning device, wherein the spring-loaded element, at one end, is rigidly connected to a supporting element of the tensioning device and, at the other end, is pivotably mounted on the supporting frame by way of a double swivel joint, and the spring-loaded element is tensioned by the pivoting of the double swivel joint out of the open position into the closed position, whereby a torque is applied onto the pivotable boom.
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B29C 65/02 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage
B29L 7/00 - Objets plats, p. ex. pellicules ou feuilles
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
An automatic welding machine for lap welding the edges of plastic webs, comprising a movable supporting frame, a heating device for partially melting the plastic webs, at least two opposing, counter-rotating pressing rollers and/or advancing rollers, at least one of which being driven, and at least one driving device comprising a drive motor and at least one gearbox for driving the pressing and/or advancing rollers, wherein the pressing rollers and/or advancing rollers are driven by the driving device by way of at least one flexible shaft. Furthermore, the gearbox can be implemented as a worm gear mechanism comprising a worm that is seated directly on a motor shaft of the drive motor and two counter-rotating worm gears driven by the worm.
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B29C 65/02 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage
B29C 65/10 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec des gaz chauds
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
Welding machine for edge-side connection at the edge of overlapping material webs, wherein the materials are connectable to one another under the effect of heat and subsequent pressure, with a chassis on which at least guide rollers, a heating device and at least one pressure roller are arranged. The heating device has a cantilevered contact heating element that can be inserted laterally between the edges of the material webs, wherein the chassis is driven by an electric motor which is arranged on a longitudinal leg of the chassis. The electric motor according to the invention is formed as a brushless DC motor and the reduction gear as a planetary gear, which are united by a drum drive motor. In this case, the direct current motor is preferably a disk rotor motor. The chassis has a lateral leg which is adjustable perpendicularly to the working direction relative to the longitudinal leg.
B23K 11/00 - Soudage par résistanceSectionnement par chauffage par résistance
B29C 65/10 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec des gaz chauds
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
F24H 3/04 - Appareils de chauffage d'air à circulation forcée l'air étant en contact direct avec l'agent chauffant, p. ex. élément chauffant électrique
B29L 31/10 - Éléments de construction, p. ex. briques, blocs, tuiles, panneaux, mâts, poutres
A hot-wedge welding device for overlap welding plastic webs, comprising a hot wedge, a pressure device for pressing the plastic webs against the hot wedge which comprises a respective pressure unit associated with one of the hot-wedge flat sides, and further comprising two mutually opposing pressure rollers. The hot wedge is pivotably mounted on a bearing shaft by way of a bearing bushing, which extends between the two hot-wedge flat sides parallel to the hot-wedge front edge at a distance therefrom. The hot wedge is mounted to have defined degrees of freedom with respect to the bearing shaft in the longitudinal direction and in the transverse direction of the bearing bushing, which in addition to the rotational movement of the hot wedge about the transverse axis thereof, also allow a tilting movement of the hot wedge about the longitudinal axis thereof and a vertical displacement of the hot wedge.
B32B 37/00 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons
B29C 65/20 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec un outil chauffé à contact direct, p. ex. avec un "miroir"
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B32B 37/06 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par le procédé de chauffage
B32B 37/10 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par la technique de pressage, p. ex. faisant usage de l'action directe du vide ou d'un fluide sous pression
B29L 7/00 - Objets plats, p. ex. pellicules ou feuilles
The hand-held hot air device, preferably for the local heating of thermoplastic materials, with a housing that forms a wand-shaped handle part with air inlet openings, and with an air guidance tube that protrudes from the handle part and radially delimits an air canal, with an electric heating element contained in the air guidance tube and an electric motor with a fan wheel contained in the handle part, and with an electronic control system arranged inside the handle part with one semiconductor power switch each arranged upstream of both the heating element and the electric motor, and with a display screen and an operating device for the hand-held hot air device arranged on the outside of the handle part. The electronic control system is implemented as microprocessor control system, the display screen as an electronic digital display, and the operating device as a digital operating device, with the digital operating device comprising a single universal operating element that is movable in at least two directions relative to the handle part for the purpose of switching the hand-held hot air device on and/or off and for determining control data of the microprocessor control system.
F24H 3/04 - Appareils de chauffage d'air à circulation forcée l'air étant en contact direct avec l'agent chauffant, p. ex. élément chauffant électrique
F24H 9/20 - Disposition ou montage des dispositifs de commande ou de sécurité
The invention relates to a process for the adjustment of a laser light spot of high intensity for the laser processing of work pieces as well as a laser device for performing the proposed process. The laser device comprises a laser emitting a laser beam and at least one focusing lens for converging the laser beam as well as an optical operating element for adjusting the beam diameter of the laser beam. The invention proposes to use as operating element a diffractive optical element that separates the laser beam emitted by the laser into partial laser beams, with the partial laser beams generated by the diffractive optical element being assembled to form a resulting laser beam that acts on the work piece. By means of a suitable design of the diffractive optical element it is possible to adjust, in particular enlarge, the diameter of the laser light spot as required.
A laser diode structure for generating a collimated or divergent laser beam, preferably for application in gas detection, with a laser diode arranged in a closed housing, with the housing comprising a housing bottom, an exit window, electrical connections, a temperature control device for the laser diode, and an optical element for influencing the laser beam. The temperature control device carrying the laser diode is arranged on the housing bottom and the optical element is positioned at a distance from the laser diode. The invention proposes an electrically controllable power device for the cyclic alteration of the position and/or alignment of the optical element in relation to the laser diode so that the optical path length for the laser beam in the housing changes periodically. The oscillating motion of the optical element has the effect of time-averaging the etalon and/or self-mixing effects caused by the back-reflections of the laser beam in the housing, thereby reducing the optical noise of the laser diode structure.
The invention relates to a method for determining the temperature-dependent state, in particular the melt state and/or the melt quantity of thermoplastic material when producing a weld seam (6), for example for joining thermoplastic parts (7, 7') by means of a plastics welding device. For process control purposes, a temperature-dependent electric state variable of the thermoplastic material of the plastic parts (7, 7') is measured continuously with and without applying heat to the plastic parts (7, 7') along the weld seam (6) and compared to a target value or to benchmark values. In the method according to the invention, the electric state variable that is used is preferably the permittivity of the plastic parts (7, 7') and the change thereof during the welding process. The permittivity is determined by means of a capacitor assembly (1), wherein the plastic material is used as the dielectric between the electrodes (3, 4) of the capacitor assembly (1). The capacitors (2) of the capacitor assembly (1) are preferably operated at different frequencies for the determination of the permittivity.
G01M 3/40 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation de moyens électriques, p. ex. par observation de décharges électriques
62.
Method and welding device for connecting sheets of material
The invention relates to a method for connecting material webs disposed with overlapping edges, wherein an automatic welding machine having a driven chassis and a drive unit disposed thereon and a welding unit is guided along the overlap zone of the material webs to be connected, such that the carried welding unit connects the edges to be connected to one another. The invention further relates to an automatic welding machine for performing the method. The invention proposes that a temporary guide marking moving along with the chassis be generated along the edge of the overlapping material web by means of a marking unit disposed on the chassis, said guide marking always extending parallel to the edge and prescribing the path of the automatic welding machine on the overlapping material web and that the guide marking be detected by means of a sensor device during the movement of the automatic welding machine, wherein a control signal is generated for a display unit and/or the drive unit and the chassis is movable along the guide marking by means of the control signal.
B23K 31/12 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux relatifs à la recherche des propriétés, p. ex. de soudabilité, des matériaux
B23Q 15/00 - Commande automatique ou régulation du mouvement d'avance, de la vitesse de coupe ou de la position tant de l'outil que de la pièce
B23Q 16/00 - Équipement non prévu ailleurs pour mettre en position de façon précise l'outil ou la pièce à travailler
The invention concerns a laser device for joining work pieces made of plastic by means of beam welding technology, with a processing head that has focusing devices for the laser beam. Here, the focusing device that is closest to the work pieces has a rotatably supported cylinder lens in the shape of a roller that focuses the laser beam along a single axis and presses the work pieces together in the form of a line in an area around the impact point of the laser beam. In order to enable the cylinder lens to always contact the surface of the work piece facing the processing head in a precisely tangential manner, the processing head has a pendulum-type suspension for the rotatable cylinder lens. This also makes it possible for the contact pressure exerted by the processing head to always act perpendicularly on the work pieces so that they are pressed together in all welding places in the same way in a defined manner during the welding process.
The invention relates to a handheld welding tool with external air supply for welding thermoplastic synthetic material, with a preferably wand-shaped housing containing at least one hot air generating device, and with flexible supply lines for air and power supply that are combined in a supply line package. The supply lines of the supply line package are connected with rear connection elements on the housing, to the supply line for the air supply encasing the power supply line as a sheath. The invention proposes to connect the supply line package rotatably to a common rear non-rotatable connection piece of the housing. This makes it possible to rotate the handheld welding tool with little force in relation to the supply line package in order to facilitate the handling of the handheld welding tool.
A welding machine for joining overlapping webs of sealing material, with a powered chassis supported by rolls, with a heating system for local heating of the webs of sealing material that is mounted laterally to the chassis (4) and can be placed between the webs of sealing material in edge regions, with at least a first pressure roll installed on the chassis for pressing together the webs of sealing material to be joined by means of heat, where a second pressure roll serving as a replacement pressure roll is placed in the chassis, whose weight rests on the drive shaft and which can be exchanged without tools for the first pressure roll that is coupled to the drive shaft of the welding machine and presses together the bitumen webs to be joined. In addition, the pressure roll (3) may have at least one contact surface made of hard metallic material; and a stripper element is provided whose free end contacts the contact surface or is in close proximity to the same. Therefore, even with materials to be welded that will contaminate the pressure roll, the welding machine is capable of operating for long periods.
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