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Electrical discharge machining device

An electrical discharge machining and machining fluid technology, applied in electric machining equipment, metal machining equipment, circuits, etc., to solve problems such as electrode damage, abnormal consumption, and slow machining speed.

Inactive Publication Date: 2012-09-12
藤本一郎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, when a large machining current is applied to a small machining area, damage or abnormal consumption of the electrode will occur, and when a small machining current is applied to a large machining area, the machining speed will decrease. Extremely slow, so the processing conditions are set based on the processing area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] Below, based on Figure 1 to Figure 10 Examples of the present invention will be described.

[0097] like figure 1 As shown, the electrical discharge machining device M is a device that supplies a machining fluid to the gap between the electrode E and the workpiece W, and applies a discharge pulse from the electrode E to the workpiece W to perform electrical discharge machining on the workpiece W. . This electrical discharge machining device M has peripheral equipment such as a machining machine body 1 , a control device 2 , and a machining liquid tank 7 . The processing machine body 1 is composed of: a head 3 equipped with an electrode E; a Z-axis moving mechanism 4 (moving device) as a feeding device that can reciprocate the head 3 in the up and down direction (Z-axis); an X-axis moving mechanism 5. The machining liquid tank 7 containing the workpiece W can be placed along the figure 1 The horizontal reciprocating movement in the left and right direction (X axis);...

Embodiment 2

[0175] Second, based on Figure 11 Example 2 will be described.

[0176] The difference from Example 1 is that the distance D from the surface of the workpiece W in Example 1 to the processing surface is known, but the distance D in Example 2 is unknown.

[0177] The columnar electrode EB is brought into contact with the processing surface of the workpiece W to initialize the moving position (interpolar distance) of the electrode EB. Secondly, if Figure 11 As shown in (a), the electrode EB is moved upwards by the Z-axis moving mechanism 4 to move the electrode EB to the first moving position. At this time, if it is set as: the first total electrostatic capacity C31, the inter-electrode electrostatic capacity Cp31 between the electrode advancing end surface and the processing surface, the processing area SB, the first two-pole distance h31 from the electrode advancing end surface to the processing surface, and the side surface of the electrode EB The electrostatic capacitan...

Embodiment 3

[0195] Second, based on Figure 12 Example 3 will be described.

[0196] It differs from Example 1 in that: the distance D from the surface of the workpiece W in Example 1 to the processing surface is known, while the distance D in Example 3 is unknown and the measured distance between two poles includes an error distance alpha. In addition, the error distance α is caused by machining chips accumulated on the machining surface of the workpiece W or the backlash of the gear system of the Z-axis moving mechanism 4. When no backlash occurs, the machining debris on the machining surface The accumulation amount of is represented by a positive value, and when a backlash occurs, it represents the total value of the negative value of the backlash amount and the positive value of the accumulation amount of machining debris.

[0197] The columnar electrode EC is brought into contact with the processing surface of the workpiece W to initialize the moving position (distance between elec...

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Abstract

Disclosed is an electrical discharge machining device (M) provided with: a Z-axis displacement mechanism (4) that can precisely displace an electrode (E); a position control unit (16) that detects the travel distance of the electrode (E); a capacitance measurement unit (12) and a capacitance measurement control unit (17) that can measure the total capacitance between the processing site of a workpiece (W) and the electrode (E); and a machining surface area calculation unit (21) and a capacitance calculation unit (22), which, during discharge machining, when the electrode (E) is displaced to the first and second displacement positions by means of the z-axis displacement mechanism (4), use first and second inter-electrode distances h1 and h2 detected by the position control unit (16) and first and second total capacitances C1 and C2 measured by a capacitance measurement unit (12) and a capacitance measurement control unit (17) to calculate the surface area (S) of the machining surface and the first and second inter-electrode capacitances Cp1 and Cp2 between the advancing surface of the electrode and the machining surface, respectively. Thus, on the basis of the machining surface area (S) and the first and second inter-electrode capacitances Cp1 and Cp2, electrical machining conditions of discharge pulses are set, machining conditions are changed at optimal measurement intervals corresponding to the inter-electrode state, and jump operations are controlled.

Description

technical field [0001] The present invention relates to an electric discharge machining device for performing electric discharge machining on the processed surface of the workpiece facing the advancing end surface of the electrode by causing electric discharge between the electrode and the workpiece, and also relates to an electric discharge machining device capable of performing electric discharge machining with high precision. An electric discharge machining device that calculates the processing area of ​​the processing surface or the electrostatic capacitance between electrodes and the processing surface to set appropriate processing conditions. Background technique [0002] Conventionally, the workpiece is machined into the same shape as the electrode by making the electrode face the workpiece and discharging it in the inter-electrode gap between the advancing end surface of the electrode in the machining travel direction and the machining surface of the workpiece. In th...

Claims

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Application Information

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IPC IPC(8): B23H1/02
CPCB23H1/02B23H7/14B23H7/20B23H1/04
Inventor 藤本一郎
Owner 藤本一郎
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