A method and device for controlling the feed rate of a saw blade which is provided with teeth and rotates about a center point relative to a workpiece during a machining process. During a rotation of the saw blade about the center point, the feed rate is selected differently during a machining process effected by teeth of different sectors of the saw blade, wherein the feed rate is selected to be lower during a machining process effected by teeth of sectors having larger radial spacing of the teeth from the center point than during a machining process effected by teeth of sectors having smaller radial spacing of the teeth from the center point. In this way, the operation of the saw blade can be optimized and the service life can be increased.
The invention relates to a method and device for controlling the feed rate (v) of a saw blade which is provided with teeth and rotates about a centre point relative to a workpiece during a machining process. According to the invention, during a rotation of the saw blade about the centre point, the feed rate (v) is selected differently during a machining process effected by teeth of different sectors (S) of the saw blade, wherein the feed rate (v) is selected to be lower during a machining process effected by teeth of sectors (S1) having larger radial spacing of the teeth from the centre point than during a machining process effected by teeth of sectors (S2) having smaller radial spacing of the teeth from the centre point. In this way, the operation of the saw blade can be optimised and the service life can be increased.
B23D 47/08 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for bringing the circular saw blade to the workpiece or removing same therefrom
B23D 59/00 - Accessories specially designed for sawing machines or sawing devices
B23Q 15/013 - Control or regulation of feed movement
G05B 19/416 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
The invention relates to a method and a device for indicating or controlling the operating state of the outlet nozzle (2) for a cutting working gas of a cutting torch or of a cutting torch working gas that aids in cutting. A vibration sensor (6) is used to measure vibrations caused by structure-borne noise and/or airborne noise as a result of the operation of the outlet nozzle (2) as a time-dependent vibration signal (V) and a frequency spectrum (F) of the measured vibration signal (V) is determined for at least one frequency range (fi, fi+1). A signal width (Si) is determined in the at least one frequency range (fi, fi+1) or a signal width distribution is determined for a plurality of frequency ranges (fi, fi+1) by means of two envelopes (E1, E2) of the signal peaks of the frequency spectrum (F), said signal width distribution being associated with one of at least three predetermined operating state ranges of the outlet nozzle (2) to identify an actual operating state range of the outlet nozzle (2), and in an additional step, an indication or control signal associated with the actual operating state range is generated. It is possible in this way to analyze the operating state of the outlet nozzle (2) with respect to an optimum cutting result and to optimize it in an additional step by way of indication or control.
B23K 7/10 - Auxiliary devices, e.g. for guiding or supporting the torch
B23K 10/00 - Welding or cutting by means of a plasma
B23K 9/013 - Arc cutting, gouging, scarfing or desurfacing
B23K 26/38 - Removing material by boring or cutting
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
B23K 31/10 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to cutting or desurfacing
The invention relates to a chip-forming machining device (1), in particular a sawing or milling device, comprising a base (2), a rotary part (3), which can be driven about an axis of rotation (20) in relation to the base (2) and which comprises a disk-shaped chip-forming tool (5), and a coolant feed (7) for feeding coolant from a pressurized, base-side coolant line (10) to the tool (5), wherein the coolant feed (7) has an outlet opening (10) on the base, which outlet opening lies against inlet openings (12) on the rotary part, which inlet openings are distributed about the axis of rotation (29) and are associated with respective channels (6) extending in the tool (5) in the direction of the outer tool circumference. In order to limit the coolant consumption, the outlet opening (10) overlaps with inlet openings (12) only in a limited angle range about the axis of rotation (20), such that only part of the inlet openings (12) is connected to the base-side feed (9) in each rotational position of the rotary part (3) in relation to the base (2).
B23C 5/28 - Features relating to lubricating or cooling
B24D 5/10 - Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their peripheryBushings or mountings therefor with cooling provisions, e.g. with radial slots
A cutting torch and a cutting nozzle (1) having at least one heating-oxygen duct (2), having at least one heating-gas duct (3), having a cutting-oxygen duct (4), which has a de Laval nozzle (5) with a convergent and a divergent section (6, 7), and having a nozzle head (8) are shown, said nozzle head (8) having a clearance (9) into which the heating-oxygen duct (2), the heating-gas duct (3) and the de Laval nozzle (5) of the cutting-oxygen duct (4) lead. In order to create a stable post-mixing cutting nozzle (1) having improved efficiency, it is proposed that the de Laval nozzle (5), leading into the clearance (9) in the nozzle head (8), is in the form of a parallel jet nozzle.
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