CN-121988818-A - Wire cutting method for anti-jamming material

CN121988818ACN 121988818 ACN121988818 ACN 121988818ACN-121988818-A

Abstract

The invention provides a wire cutting method for preventing jamming, which is used for cutting a workpiece, wherein during cutting, an electrode wire positively cuts the workpiece along the direction from top to bottom, reversely cuts the workpiece along the direction from bottom to top, and reciprocates between the forward cutting and the reverse cutting, and comprises the following steps that S1, a near point near a break point is arranged on a cutting path of the workpiece; and step S2, when the wire electrode is cut to the adjacent point, the wire electrode is adjusted or kept at a preset position, the length of the wire electrode which is advanced by the wire electrode from the preset position to the reversing position is longer than the length of the wire electrode which is required by cutting from the adjacent point to the breakpoint, and step S3, the wire electrode is cut to the breakpoint in the forward direction. The invention thoroughly eliminates the clamping stagnation phenomenon of the waste, is compatible with the existing wire cutting equipment, obviously improves the processing efficiency and reduces the rejection rate.

Inventors

ZHU ZHIMING
He Yingshu
CHEN ZHIWEN

Assignees

广州市华晨自动化科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260326

Claims (10)

1. The wire cutting method for preventing jamming is characterized in that when a workpiece is cut, an electrode wire positively cuts the workpiece along the direction from top to bottom, reversely cuts the workpiece along the direction from bottom to top, and reciprocates between the forward cutting and the reverse cutting, and the wire cutting method is characterized by comprising the following steps: s1, setting a near point close to a breakpoint on a cutting path of a workpiece; Step S2, when the wire electrode is cut to the adjacent point, the wire electrode is adjusted or kept at a preset position, and the length of the wire electrode which is required to be cut to the break point from the adjacent point is longer than the length of the wire electrode which is required to be cut to the reversing position from the preset position by the wire electrode; and S3, executing forward cutting to the breakpoint.
2. The wire cutting method of anti-seize material according to claim 1, wherein the preset position is a fixed coordinate position.
3. The wire cutting method of claim 2, wherein the preset position is a starting position of the wire electrode for performing forward cutting.
4. The wire cutting method of claim 1, wherein in the step S2, when the wire electrode is cut to the adjacent point, if the wire electrode is not at the preset position, the wire electrode is controlled to reversely empty to the preset position.
5. The wire cutting method of anti-seize material according to claim 1, wherein the preset position is any position within a preset range.
6. The method for wire cutting of anti-seize material according to claim 5, wherein in step S2, when the wire electrode is cut to the adjacent point, the position of the wire electrode is judged and the corresponding operation is performed: If the length of the wire electrode running from the current position to the reversing position is greater than or equal to the length of the wire electrode required for cutting from the adjacent point to the breakpoint, executing the step S3; If the length of the wire electrode running from the current position to the reversing position is smaller than the length of the wire electrode required for cutting from the adjacent point to the breakpoint, the wire electrode is controlled to reversely idle to the preset position, and then the step S3 is executed.
7. The wire cutting method of anti-jamming materials according to claim 1, wherein the horizontal distance between the adjacent point and the cutting path of the break point is a preset distance, and the preset distance is larger than a machining error.
8. The wire cutting method of anti-seize material as defined in claim 7, wherein said predetermined distance is 0.1mm or more.
9. The wire cutting method of anti-seize material according to claim 1, characterized in that the wire length of the wire travelling from the preset position to the reversing position of the wire is at least 1.1 times the wire length required for cutting from the point of approach to the break point.
10. The wire cutting method of anti-seize material according to claim 1, wherein the wire length of the wire running from the preset position to the reversing position is longer than the wire length required for cutting from the adjacent point to the break point by more than 0.1 m.

Description

Wire cutting method for anti-jamming material Technical Field The invention relates to the technical field of wire cutting of electric discharge machining, in particular to a wire cutting method for anti-jamming materials. Background The wire cutting processing technology is used as a core technology of precision manufacturing and is widely applied to the fields of dies, aerospace and medical appliances. The core principle is that the workpiece is cut by electric erosion through a high-speed reciprocating electrode wire (usually molybdenum wire or copper wire), and a cutting path is usually in a mode of alternately executing forward cutting (electrode wire moves from top to bottom) and reverse cutting (electrode wire moves from bottom to top) so as to improve the processing efficiency. However, in actual machining, when the cutting path reaches the breakpoint position (i.e., the critical point at which the workpiece separates from the scrap), the prior art has significant drawbacks: The problem of jamming is frequent in that if the breakpoint is in the reverse cutting stage (the wire electrode moves from bottom to top), the wire electrode generates upward force on the scrap, and the force is opposite to the gravity direction of the scrap, so that the scrap is jammed in the processing hole (such as the hole wall or the cutting gap). Limitations of existing solutions: The traditional method relies on manual intervention (such as vibration or blowing device) to assist the falling of the waste, but cannot respond in real time in a high-speed cutting scene, and has poor adaptability to different workpiece materials (such as aluminum alloy and stainless steel); The process influence is that the material clamping phenomenon directly causes the subsequent process interruption (such as wire disassembly failure and cutter repair precision reduction), so that the single-piece processing period is prolonged and the rejection rate is improved. In summary, the prior art fails to systematically solve the problem of the conflict between the cutting direction of the break point and the gravity force, and an innovative method of cutting is needed to ensure that the waste material is reliably separated from the machining hole site under the action of gravity. Disclosure of Invention The invention mainly aims to provide a wire cutting method for preventing materials from being blocked, which solves the problem of cutting the materials. In order to achieve the above object, an aspect of the present invention provides a wire cutting method of anti-seizing material for cutting a workpiece, in which a wire electrode is cut forward in a top-down direction, cut backward in a bottom-up direction, and reciprocate between the forward cutting and the backward cutting, comprising the steps of: s1, setting a near point close to a breakpoint on a cutting path of a workpiece; Step S2, when the wire electrode is cut to the adjacent point, the wire electrode is adjusted or kept at a preset position, and the length of the wire electrode which is required to be cut to the break point from the adjacent point is longer than the length of the wire electrode which is required to be cut to the reversing position from the preset position by the wire electrode; and S3, executing forward cutting to the breakpoint. The invention adopts two technical routes, wherein the preset position of one technical route is a fixed coordinate position. Preferably, the preset position is a starting position of the wire electrode for performing forward cutting. Further, in the step S2, when the wire electrode is cut to the adjacent point, if the wire electrode is not at the preset position, the wire electrode is controlled to reversely empty to the preset position. In another technical route, the preset position is any position within a preset range. Further, in the step S2, when the wire electrode is cut to the adjacent point, the position of the wire electrode is determined and a corresponding operation is performed: If the length of the wire electrode running from the current position to the reversing position is greater than or equal to the length of the wire electrode required for cutting from the adjacent point to the breakpoint, executing the step S3; If the length of the wire electrode running from the current position to the reversing position is smaller than the length of the wire electrode required for cutting from the adjacent point to the breakpoint, the wire electrode is controlled to reversely idle to the preset position, and then the step S3 is executed. Further, the horizontal distance between the adjacent point and the cutting path of the break point is a preset distance, and the preset distance is larger than the machining error. Preferably, the preset distance is greater than or equal to 0.1mm. Preferably, the length of the wire electrode travelling from the preset position to the reversing position for performing forward cutting is at least 1.1 tim