KR19980057543A - Method of measuring shape of wire electric discharge machine - Google Patents

Abstract

The present invention relates to a method for measuring a shape of a wire discharge machining machine. The method of the present invention includes a step (S1) of checking a machining result and then inputting a tolerance; Correcting the tolerance and the wire diameter, and transferring the machining path without the wire electrode performing the discharge machining (S2); Determining whether the processing path is transferred outside the processing surface of the processing result or inside the processing surface (S3); Treating the portion of the processed surface at which contact occurs during the transfer as a defective portion when transferring to the outside of the processed surface (S4); Treating the portion of the processed surface on which the contact is not generated during the transfer in the case of transferring to the inside of the processed surface as a defective portion (S5); Processing the defective part of the machining surface graphically (S6); Determining whether the machining program is terminated (S7); And a step (S8) of displaying on the screen whether or not the workpiece is defective when the machining program is terminated, and according to the present invention performing the steps sequentially, the wire electrode along the outer surface path and the inner path of the processing surface of the processing result. By re-transmitting without discharging, the parts which are less processed and the parts that have been processed can be identified, thereby reducing the time and amount of work required to check whether the result of the processing is defective.

Description

A method of checking the machining shape in a wire electric discharging machine

The present invention relates to a method for measuring a processed shape of a wire electric discharge machine, and in particular, after processing a workpiece, the wire is again transported along the processing path to determine whether the processed result is defective, and at the same time, a problem occurs during processing. The present invention relates to a method for measuring the processing geometry of a wire electric discharge machine which is designed to measure the degree of processing of the processing result by judging whether correction is possible by displaying.

In general, a wire discharge machine applies a pulse voltage between a wire electrode, such as 0.05 to 0.25 mm fine copper or tungsten, and a workpiece, generates an electric discharge in the state of the processing liquid, and generates a workpiece by the discharge energy. As an apparatus for processing, the contour of a specific shape is processed by giving a relative motion to the workpiece | work and the wire which is an electrode. At this time, the wire electrode has a stable discharge by maintaining a proper distance from the workpiece.

As a result of the processing of the above-mentioned wire electric discharge machine, there are a die shape using an external shape and a punch shape using an internal shape.

BRIEF DESCRIPTION OF THE DRAWINGS The figure for showing the die shape example of the workpiece | work of a wire electric discharge machine, A part shows the processed part of a workpiece, and B part shows the remainder after processing the workpiece.

Referring to the die shape shown in FIG. 1, when the machining result is a shape having a right angle, the machining state may be confirmed by measuring the result of the machining shape using a general measuring apparatus.

However, if the die shape has a complicated shape, it is difficult to measure the machining result. Therefore, the punch shape corresponding to the opposite pair should be matched to the die shape to check whether the machining was successful. Not only does it take a lot of time to check, but there is a problem that it takes more time to check it again by correcting it when machining is wrong.

Accordingly, the present invention has been made in order to solve the above problems, the portion of the processing is less processed and the portion is further processed by transferring again without discharging the wire electrode along the outer surface path and the inner surface of the processing surface of the processing result. The present invention provides a method for measuring the processing geometry of a wire electric discharge machine that reduces the amount of time and work required to check whether the processing result is defective.

Method for measuring the processing shape of the wire discharge machining machine according to the present invention for achieving the above object comprises the steps of checking the processing result, and then inputting the tolerance; Correcting the tolerance and the wire diameter, and transferring the machining path without the wire electrode performing electrical discharge machining; Determining whether to transfer the machining path to the outside of the processing surface or to the inside of the processing surface; Treating the portion of the processed surface where the contact occurs during the transfer as a defective portion when transferring to the outside of the processed surface; Treating a portion of the processing surface on which the contact does not occur during transportation in the case of transferring to the inside of the processing surface as a defective portion; Processing the defective part of the machining surface graphically (S6); Determining whether the machining program has ended; And displaying, on the screen, whether the workpiece is defective when the machining program ends.

By sequentially performing the steps of the present invention, it is possible to greatly reduce the time and the amount of work required to identify the defective parts of the processing result, that is, the parts that are processed and the parts that are processed.

1 is a view for showing an example of the die shape of the workpiece of the wire electric discharge machine,

2 is a hardware configuration diagram of a wire electric discharge machine to which the present invention is applied;

3 is a flow chart for the processing shape measurement method of the wire electric discharge machine according to the present invention,

4 is a view showing an example of a wire feed path for measuring the degree of processing of the workpiece,

5 is a detailed view of a transfer path of the wire electrode shown in FIG. 4;

6 is a view showing an example showing a part out of the dimension in the reference machining trajectory by confirming the machining accuracy.

* Explanation of symbols for main parts of the drawings

10: user input and output means 12: numerical control means

14 discharge control means 16 discharge voltage supply means

18: motor drive means 20: discharge voltage detection means

MT1, MT2: Motor M: Workpiece

W: Wire electrode Tab: Machining table

m: working surface

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a hardware configuration diagram of a wire discharge machine to which the present invention is applied. The wire discharge machine includes a user input / output unit 10, a numerical control unit 12, a discharge control unit 14, a discharge voltage supply unit 18, The motor drive means 20, the motors MT1 and MT2, the processing table Tab, the workpiece | work M, the wire electrode W, and the discharge voltage detection means 22 are comprised.

The user input / output means 10 inputs a user's machining program and outputs a defective part of the machining result as a graphic, a coordinate value, etc., and the numerical control means 12 receives a command according to the machining program from the user input / output means 10. A numerical control signal is received, and a numerical control signal is output to receive the discharge voltage detection signal from the discharge voltage detecting means 22 at the subsequent stage and to feed the machining path again. The discharge control means 14 receives the numerical control signal from the numerical control means 12 and outputs a discharge control signal, and the discharge voltage supply means 18 responds to the discharge control signal from the discharge control means 14. Accordingly, the discharge voltage is supplied between the workpiece M and the wire electrode W. The motor driving means 20 receives the numerical control signal from the numerical control means 12 and drives the motors MT1 and MT2. The discharge voltage detection means 22 detects the discharge voltage supplied between the workpiece M and the wire electrode W and outputs a discharge voltage detection signal to the numerical control means 12.

3 is a flow chart of a method for measuring a shape of a wire discharge machining machine according to the present invention, the method of the present invention comprises a first step (S1) of inputting a tolerance after confirming a machining result; A second step (S2) of correcting the tolerance and the wire diameter and transferring the processing path without the wire electrode performing the discharge machining; A third step (S3) of determining whether the machining path is transferred outside the machining surface of the machining result (positive tolerance) or inside the machining surface (negative tolerance); A fourth step (S4) of treating a portion of the processed surface at which contact occurs during the transfer as a defective portion when transferring to the outside of the processed surface; A fifth step (S5) of treating a portion of the processed surface on which no contact occurs during the transfer as a defective portion when transferring to the inside of the processed surface; A sixth step (S6) of graphically processing the defective part of the processed surface processed in the fourth step (S4) and the fifth step (S5); A seventh step S7 of judging whether the machining program has ended and if not finished, branching to the second step S2; And an eighth step S8 of displaying, on the screen, whether or not the workpiece is defective when the machining program is terminated as a result of the determination in the seventh step S7.

4 is a view showing a wire feed path for measuring the degree of processing of the workpiece, A represents the processed portion of the workpiece, B represents the remaining portion after processing, W represents the wire electrode, P1 and P2 represents a conveyance path of the wire electrode.

5 is a detailed view of the transfer path of the wire electrode shown in FIG. 4, a) of FIG. 5 shows the position of the wire electrode when the workpiece is processed, and b) of FIG. (Indicates the position of the wire electrode when conveyed along the positive tolerance: + X), and (c) of FIG. 5) indicates the position of the wire electrode when conveyed along the inner surface path of the processing result (negative tolerance: -X). The position of the wire electrode is shown. Here, W represents a wire electrode.

6 is a view showing an example in which a portion of the dimension is out of the reference processing trajectory by checking the machining accuracy, L1 indicated by the dotted line when the wire electrode is transported with a positive tolerance (+ X) L2, which represents a defective part and is indicated by a dashed-dotted line, represents a defective part when the wire electrode is transported with a negative tolerance (−X), m represents a working surface, and W also represents a wire electrode.

Next, the operation of the present invention will be described with reference to the accompanying drawings. 1) When checking whether the result of the machining is defective while transferring along the path outside the machining surface of the machining result (positive tolerance: + X) as shown in FIG.

After bringing a machining program (for example, a machining program as shown in FIG. 4) to the user input / output means 10 (see FIG. 2), input a positive tolerance value + X, and then wire electrode W 4) commands the numerical control means 12 (see FIG. 2) to feed along the machining paths P1 and P2 (see FIG. 4). Then, the numerical control signal generated from the numerical control means 12 (see FIG. 2) controls the motor driving means 18 (see FIG. 2) to drive the motors MT1 and MT2 (see FIG. 2), thereby processing the processing path P1. , P2: see FIG. 4). At this time, the discharge control means 14 (see FIG. 2) receives the numerical control signal from the numerical control means 12 (see FIG. 2), and causes the discharge voltage supply means 16 to supply the appropriate discharge voltage to the workpiece (M: FIG. 2). ) And the wire electrode (W: see FIG. 2). The discharge voltage detecting means 20 (see FIG. 2) determines whether a contact or a change in the discharge voltage has occurred between the workpiece M (see FIG. 2) and the wire electrode W (see FIG. 2). The numerical control means 12 (see FIG. 2) informs the numerical control means 12 (see FIG. 2) of the change state of contact or discharge voltage from the discharge voltage detecting means 20 (see FIG. 2). It stores the information on the position where the change occurred, and also the user's input / output means (refer to FIG. 2) to the defective part, which is the less processed part, while the wire electrode moves the path outside the machining surface of the machining result along the machining path. Command to display in a dotted line form (L1: see FIG. 6) in the machining path graphic.

2) When checking whether the result of the machining is defective while transferring along the inner surface path of the machining result (negative tolerance:-X) as shown in FIG.

After bringing the machining program (for example, the machining program as shown in FIG. 4) to the user input / output means 10 (see FIG. 2), input the negative tolerance value -X, and then the wire electrode W 4) commands the numerical control means 12 (see FIG. 2) to feed along the machining paths P1 and P2 (see FIG. 4). The operation is performed as described in 1) above. In this case, however, the workpiece and the wire electrode are moved apart from each other as shown in FIG. Find the part that doesn't work. Sites that do not touch when given a negative tolerance are those that are heavily machined or have defective components. As a result, the numerical control means 12 (see Fig. 2) provides the discharge voltage detection means 20 (see Fig. 2) for the positional information on a portion where no contact occurs while the wire electrode moves the processing paths P1 and P2 (see Fig. 4). ) Is inputted and stored, and the user input / output means 10 (refer to FIG. 2) is instructed to be displayed in the dotted line shape (L2: see FIG. 6) in the machining path graphic.

In the process of 1) and 2) as described above, inputting a positive and negative tolerance or following a processing path can be performed collectively.

The embodiments described above are merely illustrative in all respects and should not be construed as limiting, and all modifications that fall within the true spirit and scope of the present invention shall fall within the claims of the present invention.

As described above, according to the present invention, the portion of the processed result is confirmed by confirming the portion that is less processed and the portion that is further processed by transferring the wire electrode again without discharging the wire electrode along the outer and inner paths of the processed surface. The effect is that it can reduce the amount of time and effort required to check for defects.

Claims (1)

A first step S1 of checking the machining result and inputting a tolerance; A second step (S2) of correcting the tolerance and the wire diameter and transferring the processing path without the wire electrode performing the discharge machining; A third step (S3) of determining whether to transfer the machining path to the outside of the machining surface or to the inside of the machining surface; A fourth step (S4) of treating a portion of the processed surface at which contact occurs during the transfer as a defective portion when transferring to the outside of the processed surface; A fifth step (S5) of treating a portion of the processed surface on which no contact occurs during the transfer as a defective portion when transferring to the inside of the processed surface; A sixth step (S6) of graphically processing the defective part of the processed surface processed in the fourth step (S4) and the fifth step (S5); A seventh step S7 of judging whether the machining program has ended and if not finished, branching to the second step S2; And As a result of the determination in the seventh step (S7), when the machining program is finished, the eighth step (S8) to display on the screen whether the workpiece is defective processing method of measuring the shape of the wire discharge machine.