KR19980057542A - Wire vertical setting method of wire electric discharge machine - Google Patents

Abstract

The present invention relates to a wire vertical setting method of a wire electric discharge machining machine. The method of the present invention includes determining a vertical setting axis, and then confirming contact detection (S1); Retreating the X / Y axis by a predetermined distance from the vertical jig and the wire electrode in a non-contact state (S2); Discharge pulse generation step (S3); X / Y axis movement step (S4); Determining whether a discharge has occurred (S5); A discharge pulse generation step S6 of a reference number of times; Judging whether the number of discharges when the wire electrode is in the vertical position has been reached, and if so, terminating (S7); Storing the previous discharge count value if the discharge count has not been reached (S8); U / V axis constant amount moving step (S9); Generating a discharge pulse a reference number of times again (S10); A current discharge count counting step (S11); Determining whether the counting value for the current discharge count is greater than the counting value for the discharge count (S12); And as a result of the determination, when the counting value for the current discharge count is smaller than the counting value for the discharge count, the step S13 moves the U / V axis in the opposite direction (S13). By using the function and the electric discharge machining function to make the vertical jig and the wire electrode to be vertical to not only have the vertical precision of the wire electrode but also to consider the safety of the operator.

Description

A method of vertically setting wire in a wire electric discharging machine

The present invention relates to a wire vertical setting method of a wire electric discharge machine, and more particularly, to a vertical wire and vertical wire setting method of a vertical jig and a wire electrode to vertically process a workpiece.

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.

The conventional wire vertical setting method (Application No. 93-15181, Publication No. 95-5428) was to vertically set using the contact sensing function of the sample workpiece and the wire electric discharge machine. The conventional wire vertical setting method is by electrical contact, and the precision of vertical setting is affected by the edge contact characteristic of the sample workpiece. This affects the accuracy of the vertical setting of the edge dimensions of the sample workpiece and does not affect the vertical plane of the sample workpiece. Substantially, the corner portion is not only difficult to machine compared to the vertical surface, but also has a problem that it is easy to be worn by the slight friction, and the sharpness for precise processing increases the possibility of cutting the operator.

Accordingly, the present invention has been made to solve the above problems, by using the contact sensing function and the electric discharge machining function of the wire discharge processing machine to make the vertical jig and the wire electrode to be perpendicular to have a vertical precision of the wire electrode. Rather, to provide a wire vertical setting method of the wire electric discharge machine in consideration of the safety of the operator.

According to an aspect of the present invention, there is provided a method of vertically setting a wire of a wire electric discharge machine, including: a first step of determining an axis to be vertically set and confirming contact detection with the axis; A second step of retreating the X / Y axis by a predetermined distance in a non-contact state after the vertical jig and the wire electrode contact each other; Generating a discharge pulse; A fourth step of moving the X / Y axis; A fifth step of judging whether or not discharge has occurred, and branching to the third step if no discharge has occurred, and moving to the next step if the discharge has occurred; A sixth step of generating discharge pulses for a reference number of times; A seventh step of determining whether the number of discharges when the wire electrode is in the vertical position has been reached, and if so, ending; An eighth step of storing a previous discharge count count value when the discharge count when the wire electrode is in the vertical position has not been reached as a result of the determination in the seventh step; A ninth step of moving the U / V axis by a predetermined amount; A tenth step of generating the discharge pulses for the reference number of times again; An eleventh step of counting a current discharge count; A twelfth step of judging whether the counting value for the current discharge count is greater than the counting value for the discharge count, and branching to the seventh step if it is large; And as a result of the determination in the twelfth step, when the counting value for the current number of discharges is smaller than the counting value for the number of discharge times, move the U / V axis a predetermined amount in the opposite direction, and then proceed to the eighth step. It is characterized by consisting of a thirteenth step.

Performing the steps of the present invention sequentially can not only have the vertical precision of the wire electrode, but also consider the safety of the operator.

1 is a hardware configuration diagram of a wire electric discharge machine according to the present invention,

FIG. 2 is a view for schematically showing a process in which the ruler and the wire electrode are perpendicular to each other; FIG.

Figure 3 is a flow chart for the wire vertical setting method of the wire electric discharge machining machine according to the present invention.

* Explanation of symbols for main parts of the drawings

10: numerical control means 12: discharge control means

14: discharge voltage supply means 16: motor drive means

18: discharge voltage detection means MTx: x-axis motor

MTy: y-axis motor MTu: u-axis motor

MTv: V axis motor CP: Vertical fixture

W: Wire electrode Tab: Machining table

WG: Wire Guide PH, PL: Power Pin

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

1 is a hardware configuration diagram of a wire electric discharge machine to which the present invention is applied. The wire electric discharge machine includes a numerical control means 10, a discharge control means 12, a discharge voltage supply means 14, a motor driving means 16, Discharge voltage detecting means 18, x-axis motor MTx, y-axis motor MTy, u-axis motor MTu, v-axis motor MTv, machining table Tab, vertical jig CP, wire electrode (W), wire guide (WG), and conductive pins (PH, PL). Here, the vertical jig CP is perpendicular to the two surfaces facing each other as a cube.

The wire discharge machine applies a discharge voltage from the discharge voltage supply means 14 between the workpiece (workpiece instead of vertical jig CP) and the wire electrode at the time of machining, and the motor MTx, MTy through the motor drive means 16. By using the MTu, MTv) to approach the workpiece and the wire electrode (W) is a device using the discharge occurs at the time of insulation breakdown, the present invention also uses the discharge phenomenon in the discharge control means 12, the discharge voltage supply means (14) is controlled to cause a weak discharge, which causes the vertical jig CP not to be processed and only a discharge phenomenon occurs, which is used as a reference for judging the vertical state of the wire electrode. In more detail, each component block, the numerical control means 10 receives a command according to the machining program, outputs a numerical control signal, and receives the discharge voltage detection signal from the discharge voltage detection means 18 at a later stage. The discharge control means 12 receives the numerical control signal from the numerical control means 10 and outputs a discharge control signal, and the discharge voltage supply means 14 responds to the discharge control signal from the discharge control means 12. Accordingly, the discharge voltage is supplied between the vertical jig CP and the wire electrode W. The motor driving means 16 receives the numerical control signal from the numerical control means 10 and drives the x-axis, y-axis, u-axis, and v-axis motors MTx, MTy, MTu, MTv. The discharge voltage detection means 18 detects the discharge voltage supplied between the vertical fixture CP and the wire electrode W and outputs a discharge voltage detection signal to the numerical control means 10.

FIG. 2 is a view for schematically illustrating a process in which the ruler and the wire electrode are perpendicular to each other, and the processes are performed in order from a) to d). Here, d represents a predetermined distance in which the vertical jig CP and the wire electrode W are not in contact with each other.

3 is a flow chart of a wire vertical setting method of a wire discharge machining machine according to the present invention. The method of the present invention will be described in each step as follows.

In the first step S1, an axis to be set vertically is determined, and the contact detection is confirmed as the axis. In the second step S2, the vertical jig CP and the wire electrode W come into contact with each other, and then retreat the X / Y axis by a predetermined distance d in a non-contact state. Then, it will be in the state as shown in (a) of FIG. Subsequently, a discharge pulse is generated in the third step S3, and the X / Y axis is moved in the fourth step S4. In the fifth step S5, after determining whether the discharge has occurred, if the discharge does not occur, the process branches to the third step S3 to repeat the third step S3 to the fourth step S4. That is, the vertical jig CP and the wire electrode W are approached by moving the X / Y axis until discharge occurs, and when discharge occurs, the process goes to the next sixth step S6. In the sixth step S6, as a result of the determination in the fifth step S5, when the discharge is generated, the discharge pulse is generated by the reference number of times. In the seventh step S7, after determining whether the number of discharges when the wire electrode W is at the vertical position is reached, when the number of discharges when the wire electrode W is at the vertical position is reached, the vertical direction is vertical. Since the jig CP and the wire electrode W are in a vertical state, the vertical position adjustment is terminated. However, as a result of the determination in the seventh step S7, when the number of discharges when the wire electrode is in the vertical position has not been reached, the eighth step S8 stores the previous discharge count value. Subsequently, in the ninth step S9, the U / V axis is moved by a certain amount, where the U-axis motor MTu (see FIG. 1) is operated in the same direction as the X-axis motor MTx (see FIG. 1) and the V-axis motor. (MTv: see FIG. 1) is operated in the same direction as the Y-axis motor (MTy: see FIG. 1). In the tenth step S10, the discharge pulses are generated as many as the reference number of times, and in the eleventh step S11, the current discharge count is counted. In a twelfth step S12, it is determined whether the counting value for the current discharge count is greater than the counting value for the discharge count. If the counting value is larger, the wire electrode W is vertically branched to the seventh step S7. Determine again whether the number of discharges at the position has been reached.

As a result of the determination in the twelfth step S12, when the counting value for the current discharge count is smaller than the counting value for the discharge count, the predetermined amount of the U / V axis is reversed in the thirteenth step S13. After the movement, the process proceeds to the eighth step S8 and repeats the eighth step S8 to the twelfth step S12. When the steps S1 to S13 are sequentially performed, the vertical jig CP and the wire electrode W are placed in the vertical positions as shown in FIG.

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 vertical jig and the wire electrode are made vertical by using the contact sensing function and the electric discharge machining function of the wire electric discharge machine, so that not only the vertical precision of the wire electrode can be obtained, but also the safety of the operator is enhanced. You can do it.

Claims (1)

A first step (S1) of determining an axis to be vertically set and confirming contact detection with the axis; A second step S2 of retreating the X / Y axis by a predetermined distance in a non-contact state after the vertical jig and the wire electrode contact each other; Generating a discharge pulse (S3); A fourth step S4 of moving the X / Y axis; Determining whether a discharge has occurred, if the discharge has not occurred, branching to the third step (S3), and if the discharge has occurred, the fifth step (S5); A sixth step S6 of generating a discharge pulse the reference number of times; A seventh step S7 of determining whether the number of discharges when the wire electrode is in the vertical position has been reached, and ending when it has reached; An eighth step (S8) of storing a previous discharge number count value when the number of discharges when the wire electrode is at the vertical position has not been reached as a result of the determination in the seventh step (S7); A ninth step S9 of moving the U / V axis by a predetermined amount; A tenth step S10 of generating a discharge pulse a reference number of times again; An eleventh step S11 of counting a current discharge count; A twelfth step (S12) of branching to the seventh step (S7) if it is determined whether the counting value for the current number of discharges is greater than the counting value for the number of discharges, and if it is large; and the twelfth step (S12). If the counting value for the current discharge count is less than the counting value for the discharge count, the U / V axis moves a predetermined amount in the opposite direction, and then the process proceeds to the eighth step S8. Wire vertical setting method of the wire electric discharge machine consisting of 13 steps (S13).