A method for implementing a correct winding of a wire on a spool. The method is characterized in that it comprises a step for calculating the angular speed of a motor displacing a wire dispensing device according to the wire winding pitch and according to the pulling error, detected in relation to a given pre-set set-point and to a tolerance value, in order to determine the presence of a possible “valley error”, or of a possible “peak error”. Furthermore, if during the spool winding a “valley error” or a “peak error” is detected, the control device decides whether to slow down or to increase the speed of the wire dispensing device with the aim of filling the valley or of skipping the peak.
A cooling system (100) for cooling a cable (10). The system (100) comprises: - at least one fixed cooling channel (20), which is arranged downstream of an extrusion head (EH); and - at least one multi-pass apparatus (30), which in turn comprises a set of fixed pulleys (32, 33, 34), and a fixed, motor-driven capstan (35) designed to wind the cable (10). The system (100) is characterized in that the multi-pass apparatus (30) comprises a movable pulley (36) designed to translate along vertical guides (39A, 39B). The movable pulley (36) and the vertical guides (39A, 39B) are contained in a cooling device (56) for cooling the cable (10).
Method for finishing hardened gears comprising: a first dry removal step of a first stock amount by means of a first cutting tool with defined cutting edges; and a second dry removal step of a second stock amount by means of a second cutting tool with non defined cutting edges.
B23F 17/00 - Special methods or machines for making gear teeth, not covered by groups
B23F 5/22 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling the tool being a hob for making spur gears
B23F 5/04 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding the tool being a grinding worm
A precision planetary gear comprising: a pinion (I; 2; 102); a movable annular gear (IV; 25); a fixed annular gear (III; 9); one or more planet gears (II; 19; 219); wherein each planet gear (II; 19; 219) simultaneously meshes with the pinion (I; 2; 102), the fixed annular gear (III; 9) and the movable annular gear (IV; 25); the pinion (I; 2; 102) comprising a gear with a beveloid toothing; each planet gear (II; 19; 219) comprising a gear with a beveloid toothing; wherein a beveloid toothing has a correction (x), which linearly varies along the longitudinal direction of the tooth (Z); wherein each tooth (Z) of the beveloid toothing has a thickness (s) and a height (h) which increase moving from the apex (V) of said beveloid gear along the longitudinal direction of the tooth (Z ).
Method for profiling a finishing tool, in particular a grinding worm, having a first and a second finishing flank; the method providing the steps of: arranging a cutting portion of a profiling tool in contact with the first flank of the thread; causing the cutting portion to slide in contact with the first flank of the thread so as to profile it; removing the cutting portion from the thread; automatically rotating the profiling tool so as to arrange the cutting portion in contact with a second flank of the thread; and causing the cutting portion to slide in contact with the second flank of the thread so as to profile it.
B24B 53/07 - Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls
B23F 23/12 - Other devices, e.g. tool holdersChecking devices for controlling workpieces in machines for manufacturing gear teeth
B24B 53/075 - Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
A machine and method for the finishing of gears with a finishing tool, in particular a grinding wheel; the machine having a plurality of workpiece carrier slides, a plurality of workpiece carrier spindles, each of which is mounted on a respective workpiece carrier slide, and a plurality of loading-unloading stations; each workpiece carrier spindle is rotating and supports a gear; each workpiece carrier slide slides from a respective loading-unloading station to a working station and vice versa; in which the control unit synchronizes the rotation of each gear with the rotation of the finishing tool outside of the working station so that by entering the working station the gear meshes with the finishing tool without collisions.
A wiredrawing line (1) for wiredrawing at least one metal wire, wire rod or strap, having a plurality of rotary organs (6, 13, 14, 19) acting upon the metal wire, wire rod or strap during the wiredrawing process, a plurality of induction motors (8, 15, 20), each causing the rotation of one or more of the rotary organs (6, 13, 14, 19), a plurality of drives (21-23), each controlling a respective motor (8, 15, 20) and comprising a DC/AC inverter, and a power supply means (16) to supply said drives (21-23) with power in direct current by means of a single direct current voltage bus (24) mounted along the wiredrawing line (1).
B21C 1/00 - Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
B21C 1/04 - Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
B21C 1/20 - Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes from stock of essentially unlimited length
8.
METHOD FOR IMPLEMENTING A CORRECT WINDING OF A WIRE ON A SPOOL
A method for implementing a correct winding of a wire on a spool (100). The method is characterized in that it comprises a step for calculating the angular speed of a motor (43) displacing a wire dispensing device (40) according to the wire winding pitch and according to the pulling error, detected in relation to a given pre¬ set set-point and to a tolerance value, in order to determine the presence of a possible "valley error", or of a possible "peak error". Furthermore, if during the spool winding a "valley error" or a "peak error" is detected, the control device (CC) decides whether to slow down or to increase the speed of the wire dispensing device (40) with the aim of filling the valley or of skipping the peak.
Method for finishing hardened gears (I) comprising: a first dry removal step of a first stock amount (ql) by means of a first cutting tool (11; 111) with defined cut- ting edges; and a second dry removal step of a second stock amount (q2) by means of a second cutting tool (12; 112) with non defined cutting edges.
B23F 5/04 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding the tool being a grinding worm
B23F 5/22 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling the tool being a hob for making spur gears
B23F 17/00 - Special methods or machines for making gear teeth, not covered by groups
10.
METHOD FOR IMPLEMENTING A CORRECT WINDING OF A WIRE ON A SPOOL
Method for implementing a correct winding of a wire on a spool (100). The method also comprises a step for calculating the angular speed of a motor (43) displacing the wire dispensing device (40) according to the wire winding step and according to the dancer error, detected by a position sensor (35) that provides an analogical signal with respect to a zero position and to a tolerance value, in order to determine the presence of a possible "valley error", or of a possible "peak error". In this method, if, during the spool winding, a "valley error" or a "peak error" is detected, the control device decides whether to slow down or to increase the speed of the wire dispensing device (40) with the aim of filling the depression or skipping the peak.
A resistance annealing furnace for annealing a metal wire, strand, string, wire rod or strap having at least two electric axes (5-7), which are provided with respective pulleys (8-10) for conveying the metal wire (2), and DC voltage generator means (14) suppliable by an AC voltage source (15) to generate an annealing voltage (Uann) applied between the two electric axes (5-7). The DC voltage generator means (14) has a first voltage rectifier stage (19) connectable to the AC voltage source (15) to generate an intermediate DC voltage (Udc), an active power filter (23), connected so as to compensate the current harmonics at the input of the first voltage rectifier stage (19), a pulse width modulator (20) to transform the intermediate voltage (Udc) into a first PWM voltage (Uml), a voltage transformer (21) to transform the first PWM voltage (Uml) into a corresponding second PWM voltage (Um2), and second voltage rectifier means (22) to transform the second modulated PWM voltage (Um2) into the annealing voltage (Uann).
A resistance annealing furnace for annealing a metal wire, strand, string, wire rod or strap having at least two electric axes (5-7) provided with respective pulleys (8-10) to convey the metal wire (2) and a DC voltage generator (14) suppliable with an AC voltage (Uac) to generate an annealing voltage (Uann) applied between the two electric axes (5-7) so as to provoke the annealing due to Joule effect. The DC voltage generator (14) has active supplying means (19) supplied with the AC voltage (Uac) so as to generate an intermediate DC voltage (Udc), a pulse width modulator (20) to transform the intermediate voltage (Udc) into a first PWM voltage (Um1) with the same amplitude, a voltage transformer (21) to transform the first PWM voltage (Um1) into a second PWM voltage (Um2) with a smaller amplitude, and a voltage rectifier stage (22) to transform the second PWM voltage (Um2) into the annealing voltage (Uann).
Method for profiling a finishing tool (2), in particular a grinding worm, having a first and a second finishing flank (4); the method providing the steps of: arranging a cutting portion (30, 31; 130A, 131A) of a profiling tool (9; 109) in contact with the first flank (4) of the thread; causing the cutting portion (30; 31; 130A, 131A) to slide in contact with the first flank (4) of the thread so as to profile it; removing the cutting portion (30; 31; 130A; 131A) from the thread (3); automatically rotating the profiling tool (9; 109) so as to arrange the cutting portion (30; 31; 130A, 131A) in contact with a second flank of the thread (5); and causing the cutting portion (30; 31; 130A, 131A) to slide in contact with the second flank (5) of the thread (3) so as to profile it.
B23F 23/12 - Other devices, e.g. tool holdersChecking devices for controlling workpieces in machines for manufacturing gear teeth
B24B 53/075 - Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
A machine and method for the finishing of gears (I; I1; I2) with a finishing tool (5; 105; 205), in particular a grinding wheel; the machine having a plurality of workpiece carrier slides (10,11; 110, 111; 210, 211), a plurality of workpiece carrier spindles (14, 15; 114, 115; 214, 215), each of which is mounted on a respective workpiece carrier slide (10, 11; 110, 111; 210, 211), and a plurality of loading-unloading stations (SI, S2); each workpiece carrier spindle (14, 15; 114, 115; 214, 215) is rotating and supports a gear (I; I1; I2); each workpiece carrier slide (10, 11; 110, 111; 210, 211) slides from a respective loading-unloading station (S1; S2) to a working station (L; L1, L2) and vice versa; in which the control unit (23; 123; 223) synchronizes' the rotation of each gear (I; I1; I2) with the rotation of the finishing tool (5; 105; 205) outside of the working station (L; L1, L2) so that by entering the working station (L; L1 L2) the gear (I; I1; I2) meshes with the finishing tool (5; 105) without collisions.
Apparatus (100) for the production of an electric conductor provided with at least a layer of coating plastic material. The apparatus (100) comprises: a head (10) for the extrusion of an electric conductor (EC); at least a main extruder (30) having a first supply duct (21); at least an auxiliary extruder (40) having a second supply duct (22); and a device (20) for the selection and the diversion of the flows of coating plastic material. The selection and diversion device (20) is provided, in turn, with at least a device (40) for the exclusion of the auxiliary extruder (40); with a bypass duct (23) between the first duct (21) and the second duct (22); and with a flow-regulating diverter valve (VL1) arranged in the intersection point between the first supply duct (21) and a bypass duct (23) connecting the first duct (21) to the second duct (22).
A machine for making gears.
The machine comprises a piece-holder unit and an operating unit equipped with an operating head provided with at least one tool for machining a piece. Moreover, one piece-holder unit and the operating unit are provided with relative motion with respect to each another in a direction. The machine is characterized in that the operating unit is suitable to move, in a direction substantially perpendicular to the direction, and in that the tool is mounted on a slide provided with a tangential motion defined by a direction.
B23Q 39/00 - Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
B23Q 1/48 - Movable or adjustable work or tool supports using particular mechanisms with sliding pairs and rotating pairs
B23F 5/22 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling the tool being a hob for making spur gears
B23F 17/00 - Special methods or machines for making gear teeth, not covered by groups
B23F 23/00 - Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
B23Q 39/02 - Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
B23F 21/00 - Tools specially adapted for use in machines for manufacturing gear teeth
B23F 1/06 - Making gear teeth by tools of which the profile matches the profile of the required surface by milling
B23Q 1/62 - Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only two sliding pairs only with perpendicular axes, e.g. cross-slides
A machine (1) for making gears. The machine (1) comprises a piece -holder, unit (3*, 3**) and an operating unit (20) equipped with an operating head (30) provided with at least one tool (33; 33A, 33B) for machining a piece. Moreover, one piece-holder unit (3*; 3**) and the operating unit (20) are provided with relative motion with respect to each another in a direction (X1, X2). The machine (1) is characterized in that the operating unit (20) is suitable to move, in a direction (Y1) substantially perpendicular to the direction (X1, X2), and in that the tool (33; 33A, 33B) is mounted on a slide (25) provided with a tangential motion defined by a direction (Y).
B23F 5/22 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling the tool being a hob for making spur gears
B23Q 39/02 - Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
A machine (1) for making gears. The machine comprising at least one piece -holder -table (7), which is mounted to rotate about a given first longitudinal axis (8) thereof, and supports a piece being machined; and at least an operating head (39), which is provided with at least one tool (42) for machining the piece. The machine (1) is characterized in that the piece-holder table (7) and the operating head (39) are provided with relative motion with respect to each other in a first direction (4). Moreover, the operating head (39) and the piece - holder table (7) can be selectively stopped along their respective path according to the machining process to be carried out on the piece.
B23F 5/22 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling the tool being a hob for making spur gears
B23Q 1/28 - Means for securing sliding members in any desired position
19.
ELECTRIC CAPSTAN FOR DRAWING MACHINES OR FOR OTHER MACHINES FOR PROCESSING ROD, WIRE, STRIP OR ROPE, OF ANY MATERIAL
Electric capstan for drawing machines or for other machines for processing metal or nonmetal rod, wire or strip, said capstan (C) being characterized in that it is mounted directly on the shaft (103) of an electric torque motor or similar motor (3), of suitable characteristics, with internal support bearings (9, 22) suitable for the purpose, with a stator (203, 503, 403) mounted at a right angle on the rear face of a vertical support shoulder (1), on the front face of which said capstan is located, this shoulder having a hole (2) for the passage of said shaft (103) which passes through at least one cover (4) with sealing means (5, 105), which closes said hole (2) to protect the motor (3), for example to prevent the cooling and lubricating liquid surrounding the capstans and dies from leaking through towards the motor.
B21C 1/14 - Drums, e.g. capstansConnection of grippers theretoGrippers specially adapted for drawing machines or apparatus of the drum typeCouplings specially adapted for these drums
A machine for making gears is provided with at least one faceplate (7), which supports a piece during machining and is movable in a given forward direction (4), at least one operating head (39), that supports at least one tool (42) for machining the piece, and is movable in the forward direction (4), and a first and a second locking device (31, 10) to selectively lock the operating head (39) and the faceplate (7) in the forward direction (4) respectively.
Extruder screw (3), of the single type, for a machine (1) for extruding plastics material, said machine (1) comprising a barrel (2) heated and temperature-controlled by suitable means and having an inner surface (8) inside which rotates said screw (3) which comprises a primary thread (4) forming a primary compartment (10) and comprises a secondary thread (5) forming a secondary compartment (11) and having a ridge (9) positioned at a certain distance (d) from the inner surface (8) of said barrel (2) to form a transfer passage for the plastics material, wherein said secondary thread (5) comprises supplementary transfer means (6) formed entirely within the body of said secondary thread (5), through which more plastics material can flow from one face (14) to the other (13) of the secondary thread (5).
A tool (10) for reconditioning gear grinding wheels. The tool (10) is characterized by having a master (11) having a first number of teeth (14); and a wafer (12) having a second number of teeth (15). The wafer (12) is fixed to the master (11) to safeguard portions of the first number of teeth (14) of the master (11) from wear.
B24B 53/075 - Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
B23F 23/12 - Other devices, e.g. tool holdersChecking devices for controlling workpieces in machines for manufacturing gear teeth
patents
