摘要:
An electrode wire (20) is drawn from a feed reel (22), led via guide rollers (24-30) to a machining section (32) and finally wound onto a winding reel (40). The electrode wire (20) is guided in such a way that it remains in the same plane perpendicular to the axis when wound onto the winding reel (40) and when drawn from the feed reel (22). Both reels (22, 40) are mounted on a common carrier (50) which can move on a line parallel to the axes of the reels (22, 40). A measurement device (70) is arranged between the feed reel (22) and first guide roller (24) and measures deviations in the position of the electrode wire (20) from a predetermined position. The carrier (50) is linked to a slide drive (60) which corrects deviations noted in the position of the electrode wire (20) unwinding from the wind-off reel (22) by axial displacement of the carrier (50) and thus ensures that the used electrode wire (20) is wound correctly onto the winding reel (40).
摘要:
A touch-sensing device (60) is used to determine the spacing of the cutting teeth (12) of a workpiece (10) in relation to a workpiece holder (44), said touch-sensing device (60) being in a measuring position reached by the tip (18) of a cutting tooth (12) of the workpiece (10) when the workpiece slide (42) is displaced in the direction of the swivel axis (A), said cutting tooth (12) pointing in the direction of the swivel axis (A). The touch-sensing device (60) comprises a barrier (70) whose length (L) in the middle plane (G) transversal to the workpiece slide rail (40) is greater than the maximum tooth spacing (T) of the workpieces (10). The inventive machine has a control mechanism which is programmed so that the touch-sensing device (60) is activated before an advancing device (50) if the tip (18) of a cutting tooth (2) is not located on the swivel axis (A).
摘要:
A swivelling body (22) which can swivel on a machine frame (20) defines a lifting axis (D) transversal to its swivelling axis (A) along which a lifting carriage (24) can slide past the swivelling body (22). A tool carriage (26) can be adjusted along a spindle axis (E) on the lifting carriage (24) transversely to the lifting axis (D). A tool spindle (28) which can be fitted with a tool (30) is rotatably mounted about the spindle axis (E) on the tool carriage (26). A workpiece carriage (42) which defines with a workpiece holder (44) a middle plane (G) normal to the swivelling axis (A) is transversely guided on the machine frame (20). A feed finger (58) can be intermittently laid on a cutting tooth (12) of a workpiece (10) to feed the tooth forward. A common sensing body (7) can be moved from a rest position to a measurement position next to point (H), at which the swivelling axis (A) crosses the middle plane (G), in order to determine measurement values which represent the distance between the cutting teeth (12) and the workpiece holder (44), as well as the state of wear of the tool (30) or feed finger (58). The thus determined measurement values are converted into signals for controlling the workpiece carriage (42) and the tool carriage (26) and/or the feeding device (50).
摘要:
The invention concerns electrical discharge machining of cutting tips (60) using an electrode wire (50) by programme-controlled rotation of a cutting tip (60) about a workpiece axis (A) and rectilinear displacement of the cutting tip (60) in relation to the electrode wire (50) along at least on of three axes (X, Y, Z) of an orthogonal co-ordinate system including one axis (X) parallel to the workpiece axis (A). When a flank (64) adjacent to a cutting edge (66) is machined, the cutting tip (60) is rotated about the workpiece axis (A) so that the point of contact between the electrode wire (50) and the cutting edge (66) lies in each case on a workpiece axis (E) extending at right angles to the electrode wire (50) and to two axes (X, Y) of the co-ordinate system. When sections of the flank (64) adjacent to the sections of the cutting edge (66) which are not parallel to workpiece axis (A) are machined, the electrode wire (50) is rotated about the workpiece axis (E).
摘要:
The invention relates to an apparatus (10) for machining plate-shaped or cylindrical workpieces (70) that are provided with cutting teeth (S). Said apparatus (10) comprises a machine base (12), a machining device (14) that is movable relative to the machine base (12), and a workpiece positioning device (16) which is movable relative to the machine base (12). The machining device (14) encompasses a machining bridge (18) which can be linearly displaced relative to the machine base (12) along a first axis (Y1) in space, and a machining arm (20) that can be linearly displaced relative to the machining bridge (18) along a second axis (X1) in space. A machining unit (26) comprising a machining tool (28) is mounted on the machining arm (20) so as to be pivotable about a swiveling axis (E1) which extends substantially perpendicular to a plane defined by the first and second axis (Y1, X1) in space. The workpiece positioning device (16) is equipped with a bearing carriage (32) which can be linearly displaced relative to the machine base (12) along a third axis (Z1) in space. A tilting bearing arrangement in which a workpiece accommodating arrangement (44) is mounted so as to be tiltable about a tilting axis (B1) is provided on the bearing carriage (32).
摘要:
The machine has a tool slide (26) which can be moved along a spindle axis (E) and crosswise thereto under numerical control. A tool spindle (28) is mounted on the tool slide (26) in such a way that it can be rotary-driven about the spindle axis (E). Said tool spindle (28) can be fitted with a disk-shaped tool for machining down a workpiece (10). The machine also has a workpiece slide (42) which can be moved along a workpiece slide rail (40) under numerical control, and which supports a workpiece holder (44). The tool (30) is an electroconductive element of an electric circuit (30, 36, 46, 48, 10) which is closed by the workpiece (10) when the tool (30) is touched. The tool spindle (28) is driven by a motor (84) which can be switched from an operating speed for machining down the workpiece (10) to a much lower measuring speed. Together with the numerically controlled movement means provided on the machine, the measuring device can accommodate the dimensions necessary for recognising and machining workpieces with cutting teeth, especially circular saw blades in a shape suitable for the numerical control of the machine.
摘要:
The head of a work piece (46) is allocated to a work piece holding device (82) on which a work piece (10) can be arranged in such a way that the tips of the teeth (18) of a cutting tooth (12) that is to be machined are located in a stationary reference axis (A). A tool spindle (52) that can be fitted with disc-shaped tools (100) is arranged in such a way that it can be driven around the axis of a spindle (C). The head of the tool (46) is supported in such a way that it can be displaced by a movable carriage (34) which can slide back and forth along a lift guide (32) in a diagonal direction in relation to the reference axis (A). A feed carriage (24) can be displaced along a feed guide (22) in a diagonal direction in relation to the lift guide (32) and a drag bearing (42) defines a swiveling axis (B) parallel to the lift guide (32). The head of the work tool (46) can pivot around said swiveling axis by means of a swivel drive (60) so that it can move from a normal position to machine the surfaces of the cutting teeth (12) lying parallel to the reference axis (A) to an inclined position to machine the inclined surfaces of the cutting teeth (12). The distance (x) of the active surface (106) of the work tool (100) from the swiveling axis (B) can be measured with a measuring device (108).
摘要:
The machine has a tool slide (26) which can be moved along a spindle axis (E) and crosswise thereto under numerical control. A tool spindle (28) is mounted on the tool slide (26) in such a way that it can be rotary-driven about the spindle axis (E). Said tool spindle (28) can be fitted with a disk-shaped tool for machining down a workpiece (10). The machine also has a workpiece slide (42) which can be moved along a workpiece slide rail (40) under numerical control, and which supports a workpiece holder (44). The tool (30) is an electroconductive element of an electric circuit (30, 36, 46, 48, 10) which is closed by the workpiece (10) when the tool (30) is touched. The tool spindle (28) is driven by a motor (84) which can be switched from an operating speed for machining down the workpiece (10) to a much lower measuring speed. Together with the numerically controlled movement means provided on the machine, the measuring device can accommodate the dimensions necessary for recognising and machining workpieces with cutting teeth, especially circular saw blades in a shape suitable for the numerical control of the machine.
摘要:
Pendant l'usinage électro-érosif de plaquettes coupantes (60) au moyen d'un fil électrode (50), une plaquette coupante (60) est mise en rotation autour de l'axe (A) d'une pièce, en fonction d'un programme, et déplacée en ligne droite par rapport au fil électrode (50) le long d'au moins un parmi trois axes (X, Y, Z) d'un système de coordonnées rectangulaires, qui comprend un axe (X) parallèle à l'axe (A) de la pièce. Pendant l'usinage d'une surface libre (64) adjacente à une arête coupante (66), la plaquette coupante (60) est mise en rotation autour de l'axe (A) de la pièce de sorte que le point de contact entre le fil électrode (50) et l'arête coupante (66) se situe toujours sur un axe (E) de l'outil qui forme un angle droit par rapport au fil électrode (50) et à deux axes (X, Y) du système de coordonnées. Le fil électrode (50) est mis en rotation autour de l'axe (E) de l'outil pendant l'usinage de sections de la surface libre (64) adjacentes à des sections de l'arête coupante (66) non parallèles à l'axe (A) de la pièce.