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Wire EDM

A technology of electrical discharge machining and wire electrode, which is applied in the field of online electrode electrical discharge machining devices, can solve the problems of reduced precision of the processed surface and wire electrode fracture, and achieve the effect of inhibiting fracture

Active Publication Date: 2016-08-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, in these methods, as described above, a pulse voltage is simultaneously applied between the workpiece and the cutting wire part, a discharge is generated, and a plurality of thin plates are cut out from the workpiece at one time, so there is a problem that the machining current flows from and to the generated discharge. The power supply part adjacent to the cutting wire electrode part flows, causing the wire electrode to break and reducing the accuracy of the processed surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is a perspective view showing a schematic configuration of the wire electric discharge machining device 100 according to Embodiment 1 of the present invention. exist figure 1 Among them, the wire electric discharge machining apparatus 100 has a bobbin 1 for drawing out a wire electrode 2, a first guide roller 3a, a second guide roller 3b, a third guide roller 3c, a fourth guide roller 3d, a fifth guide roller 3e, a 6 Guide roller 3f, and recovery roller 5 for recovering the wire electrode 2. One wire electrode 2 is wound sequentially around each of the first to sixth guide rollers 3a to 3f, and the wire electrodes 2 are arranged in parallel in the axial direction. During wire electric discharge machining, the wire electrode 2 travels from the bobbin 1 to the recovery roller 5 through the above path.

[0030] The cutting wire electrode part 2a which consists of the wire electrodes 2 stretched parallel to each other is comprised between the 3rd guide roller...

Embodiment approach 2

[0046] figure 2 It is a plan view of the cutting wire part 2 a and the workpiece 8 according to Embodiment 2 of the present invention viewed from the direction in which the cutting wire part 2 a is stretched. The workpiece moving table 81 has a structure driven in the moving direction 80 . Further, the workpiece fixing surface 86 of the workpiece moving table 81 is configured to be parallel to the direction in which the cutting wire portions 2a having the plurality of cutting wires 2a1 to 2a5 are arranged. Other configurations are the same as those in Embodiment 1.

[0047] Now, the workpiece 8 is fixed in a state where the inclination angle of the end surface 83 is inclined by the angle θ with respect to the inclination angle of the surface 21 including the cutting wire electrode portion 2 a. The inclination angle of the surface 21 including the cutting wire portion 2a can be considered, for example, as the surface 21 including the cutting wire portion 2a (including the di...

Embodiment approach 3

[0056] Figure 4 It is a plan view of the cutting wire part 2a and the workpiece 8 of the wire electric discharge machining apparatus 100 according to Embodiment 3 of the present invention viewed from the extending direction of the cutting wire part 2a. The wire electric discharge machining apparatus 100 according to the present embodiment has a structure having an angle measuring unit 9 for measuring the end face of the workpiece 8 relative to the cutting wire portion 2a having the plurality of cutting wires 2a1 to 2a5. The inclination angle in the parallel direction was measured. As the angle measuring unit 9 , a non-contact measuring unit such as a laser displacement meter can be used, for example.

[0057] The angle measuring unit 9 can for example be as Figure 5The measurement data 82 on the cutting wire portion 2 a and the end surface shape of the workpiece 8 are obtained as described above. Furthermore, the angle measurement unit 9 can separate the signals obtained ...

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Abstract

A wire electric-discharge machining device includes a control unit that selects a cutting wire to which a pulse voltage is applied by a pulse-voltage generation unit on a basis of an angle formed between an end face of a workpiece and a plane including a plurality of cutting wires, which are not parallel to the end face, an interval between parallel cutting wires, and a relative distance between the cutting wires and the workpiece. A drive unit drives a workpiece in a direction not vertical to the plane including the cutting wires, and the workpiece is cut by electric-discharge machining by applying a pulse voltage.

Description

technical field [0001] The present invention relates to a wire electric discharge machining device, a wire electric discharge machining method, a thin plate manufacturing method, and a semiconductor wafer manufacturing method, and in particular, to a method for processing a workpiece and having a wire electrode wound around a spacer. Wire electrical discharge machining apparatus and wire electrical discharge machining method in which a pulse voltage is applied between cutting wire electrode portions of a plurality of cutting wire electrodes formed on a plurality of guide rollers arranged at intervals to discharge and cut a workpiece into a plurality of pieces , thin plate manufacturing method and semiconductor wafer manufacturing method. Background technique [0002] A technique has been disclosed in which a plurality of cutting wire portions are formed on a columnar workpiece by winding one wire electrode between a plurality of guide rollers, and a gap between the cutting w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H7/02
CPCB23H1/028B23H7/02B23H7/06B23H7/10
Inventor 糸数笃三宅英孝
Owner MITSUBISHI ELECTRIC CORP
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