JPH0825143A - Production method for electric discharge machining electrode - Google Patents

Abstract

PURPOSE:To provide a production method for an electric discharge machining electrode, manufacturing in a short time, high accurately and further efficiently the electric discharge machining electrode inevitable for precision work of molding deep groove machining or the like. CONSTITUTION:An external shape of a rib use electrode in user service is selected from 12 kinds of standard patterns P1 to P12 stored in an internal memory 2, also to input dimensional data in each part of the selected standard pattern from a keyboard 3. Thereafter based on the input dimensional data, operation of an electric discharge machine 7 is controlled by a CPU1, to machine an external shape of a rib use electrode substrate 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an electric discharge machining electrode, which is indispensable for precision machining such as deep groove machining for forming a rib.

[0002]

2. Description of the Related Art Conventionally, a reinforcing rib for improving the strength of a molded article itself is generally provided on the back surface side of the molded article. These reinforcing ribs are designed to be integrally molded with a resin molded product by performing electrical discharge machining of the mold for the resin molded product with an electric discharge machining electrode. It has been proposed that the rib itself has a positioning function such as fixing and guide.

Further, the electric discharge machining electrode for forming a rib as described above is a consumable tool that is consumed during electric discharge machining.
The degree of production efficiency (cost, production time, precision, etc.) greatly influences the effect of the electric discharge machining itself. Further, it is necessary to select the dimensions and draft of the electrode for electric discharge machining in accordance with not only the requirements of the rib body but also the conditions during electric discharge machining, the characteristics of the material to be machined, the conditions during modeling, and the like.

[0004]

However, the above-mentioned conventional electric discharge machining electrode is secondarily determined and designed by the size and shape of the resin molded product (product) and the required conditions at the time of product design. Often determined by the individual knowledge of the person. For this reason, individual support is indispensable and it is difficult to standardize, so the current situation is that individual products are handmade based on the schematic drawing prepared by the mold maker of resin molded products.
For this reason, it takes a lot of time and effort to manufacture the electrodes, and in the event of inadequate communication between the design, processing, and use, many problems will occur, and the electrodes will need to be corrected and reworked accordingly. I have a problem.

The present invention was devised in view of the above circumstances, and it is an electric discharge machining method for producing an electric discharge machining electrode which is indispensable for precision machining such as deep groove machining for modeling in a short time with high accuracy and efficiency. It is an object of the present invention to provide a method for producing an electrode for use.

[0006]

In order to solve the above-mentioned problems, the method for producing an electrode for electric discharge machining according to claim 1 of the present invention takes the following means.

That is, a pattern selection step of selecting the outer shape of the electric discharge machining electrode for a user from a plurality of standard patterns stored in the storage means, and each part of the selected standard pattern after this pattern selection step. A data input step of inputting the dimension data of the processing means from the input means, and a processing control step of controlling the operation of the processing means by the control means based on the input size data after the data input step,
Along with this processing control step, there is provided a substrate processing step of externally processing the substrate of the electric discharge machining electrode by the processing means.

In order to solve the above-mentioned problems, the method for producing an electrode for electric discharge machining according to claim 2 takes the following means in the method for producing an electrode for electric discharge machining according to claim 1.

That is, after the data input step, there is provided a data recording step of recording the input dimension data in the recording means.

In order to solve the above-mentioned problems, the method for producing an electric discharge machining electrode according to a third aspect of the present invention employs the following means in the method for producing an electric discharge machining electrode according to the first aspect.

That is, after the data inputting step, there is provided a drawing creating step for creating a drawing of the electric discharge machining electrode by the drawing creating means based on the inputted dimension data.

[0012]

According to the structure of the above-mentioned claim 1, the outer shape of the electric discharge machining electrode for user use is selected from a plurality of standard patterns stored in the storage means, and each part of the selected standard pattern is selected. Input dimensional data from the input means. After that, the control means controls the operation of the machining means on the basis of the inputted dimension data, and the substrate of the electric discharge machining electrode is machined. This makes it possible to standardize the production of the electric discharge machining electrode so as to be individually applicable, and as a result, it becomes possible to produce the electric discharge machining electrode in a short time, with high accuracy, and with high efficiency.

According to the second aspect of the invention, the dimension data input from the input means is recorded in the recording means.
As a result, data management of the requested electric discharge machining electrode can be easily performed.

Further, according to the third aspect of the invention, the drawing of the electric discharge machining electrode is created by the drawing creating means based on the dimension data input from the input means. This allows
Even if there is no schematic drawing from the user, it is possible to easily create a drawing of the electric discharge machining electrode by inputting only the numerical values determined by the standard pattern.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
The following is a description based on (a) and (b).
This example illustrates a case where the method for producing an electric discharge machining electrode is applied to an electric discharge machining system for producing a rib electrode for machining a rib of a molding die of a resin molded product by electric discharge machining. Is.

The electrical discharge machining system according to this embodiment is shown in FIG.
As shown in FIG. 2, a CPU (Centra) as a control unit that executes programs for controlling the operation of various components
l Processing Unit) 1. In the CPU 1, various programs are stored, an internal memory (storage means) 2 used as a work area, and a keyboard 3 as an input means for inputting information such as dimension data.
And CRT (Cathode Ray Tu
be) 4, an FDD (Floppy Disc Drive) 5 as a recording means for recording dimension data on a floppy disk, an XY plotter 6 as a drawing creating means, and an electric discharge machine 7 as a machining means. Connected via line B.

As shown in FIG. 2, the internal memory 2 is provided with processing initial setting files, standard pattern files, board size files, CAD / CAM files, and storage areas 2a to 2e for size data. In the standard pattern file area 2b, as shown in FIG. 3, twelve kinds of outer shapes P1 to P12 of the rib electrodes as the electric discharge machining electrodes are stored as standard patterns, and
The dimension items of each part of these standard patterns P1 to P12 are stored.

The dimension items of the respective parts of the standard patterns P1 to P12 are items for determining the detailed dimensions of the standard pattern shape, and are the total length, the width, the height, the angle, the roundness of the corner, the taper height, For example, the taper angle. For example, in the case of the fifth standard pattern P5 shown in FIG. 3, FIG.
As shown in (b), the total length L of the rib electrode, the total height RH,
Taper height Rh, full width RT, tip width Rt, step length X1
X2, step height Y1, taper angles θ1 and θ2, and corner circle radii R1 to R6 are set as items. Similarly, an item for determining a detailed dimension is set for each of the other standard patterns.

On the other hand, in the board size file 2c,
The dimension data of the rib electrode substrate standardized into several types is stored. As shown in FIG. 5, the rib electrode substrate 10 has a long plate shape including a parallel portion 10a and a tapered portion 10b, and its longitudinal dimension is uniformly 300 (mm).
For the other dimensions, each item of total height H, taper height h, total width T, tip width t ± 0.03 (mm), and taper angle θ ± 1/10 (°) is predetermined. It is standardized by setting it to the numerical value of. These several types of standardized rib electrode substrates 10 are processed in advance,
It is stocked.

In the above structure, the electric discharge machining (cutting) of the rib electrode substrate 10 by the electric discharge machining system is performed.
The process will be described below based on the flowchart of FIG.

First, the user (customer) sends the number of the rib electrode substrate 10 requested by the user, the number of the standard pattern, and the values relating to the dimension items of each part as data by a communication means such as a facsimile or a telephone. Will come. The operator (processor) inputs the data sent from the user from the keyboard 3. For example, when the standard pattern P8 is selected, the file of the standard pattern P8 is read from the standard pattern file area 2b of the internal memory 2, and the CRT 4 displays a setting screen for dimension items of each part as shown in FIG. It

Then, the dimension data sent from the user is input on the above setting screen. In this case, the total length L of the rib electrode, the total height RH, the taper height R
Input h, total width RT, tip width Rt, step lengths X1 to X4, step heights Y1 to Y4, and corner circle radii R1 to R10.
When the dimension data specified by the user is input (S
1), this size data is temporarily stored in the size data area 2e of the internal memory 2 (S2). In the data input of S1, the rib electrode substrate 1 corresponding to the user's designation
The 0 file is the board size file area 2 of the internal memory 2.
The dimension data is read out from c and is also input at the same time.

Thereafter, when the operator gives an instruction to start cutting (S3), it is determined whether or not all the data have been input (S4). S4
If all the data has not been input, an input instruction is given (S5) and then the process returns to S1. On the other hand, if all the data has been entered, the dimension data area 2e
The dimensional data stored inside is FD by FDD5.
Is written in (S6). Then, the operation of the electric discharge machine 7 is controlled based on the input dimension data,
A cutting process of the rib electrode substrate 10 is performed (S
7).

Next, the cutting process in S7 will be described below with reference to the flowchart of FIG. The operator takes out a number designated by the user from the rib electrodes 10 which are stocked in advance, and sets it on the electric discharge machine 7.

When the cutting process start switch is turned on, the dimension data stored in the dimension data area 2e is read (S71), and the CPU 1 of the electric discharge machine 7 is read based on this dimension data. Control operation. As a result, the rib electrode substrate 10 is formed as shown in FIG.
As shown in (a), the wire-shaped electric discharge electrode 7a constituting the electric discharge machine 7 is used for cutting (S7).
2) It is moved in the XY direction by a mobile machine (not shown) that constitutes the electric discharge machine 7 (S73). Dimension data is
The necessary amount is read little by little according to the cutting direction.

Next, it is judged whether or not the cutting of the data read in S71 is completed (S7).
4). In S74, if the cutting of the read data is not finished, the process returns to S72 again,
If the cutting of the read data has been completed, the necessary dimension data is read next (S75). Then, the above steps S72 to S75 are repeated, and when all the dimension data processing is completed (S76), the cutting of the rib electrode substrate 10 is completed, and the user specifies as shown in FIG. 9B. A rib electrode 10 'having a size is manufactured.

As described above, in this embodiment, the rib electrode substrate 10 standardized to several types is manufactured in advance and stocked, so that the taper portion 10b is formed after the user makes a request. The processing work can be omitted. Generally, copper is used for the thin rib electrode, but when this is made to have a taper by cutting or grinding, there arises a problem of generation of bending and burr due to heat.
Therefore, in order to perform the taper portion 10b at the same time as the outer shape processing, it is necessary to manually correct the curvature and the burr.

On the other hand, as described above, the rib electrode substrate 10 having the tapered portion 10b previously processed is subjected to electric discharge machining to form the outer shape, thereby preventing the occurrence of the above-mentioned bending and burrs. it can. Therefore, the work from the user's ordering to the manufacturing can be simplified, and the time to product shipment can be greatly shortened.

Further, the standard pattern P1 to P is used for the outer shape processing.
Since the outline shape of 12 is selected and the detailed dimensions are instructed, the time required for machining is longer than the conventional method of determining the outer shape and dimensions based on the schematic sent from the user. Can be significantly shortened. That is,
The user only needs to specify the rib electrode substrate 10, the standard patterns P1 to P12, and the values of the dimension items of each part by a facsimile or the like from the user.
0'can be produced with high precision and in a short time.

Further, as described above, by recording the input dimension data in the FDD 5, the data management of the requested rib electrode 10 'can be easily performed, and the user again requests the electrode 10' having the same specifications. Even if this happens, the electrode 10 'can be manufactured quickly and with high accuracy.

Further, by creating a drawing of the rib electrode 10 'by the XY plotter 6 based on the inputted dimensional data, even if there is no drawing (schematic diagram) from the user (product mold maker). A drawing (approval drawing) of the rib electrode 10 'can be easily created by communicating only the numerical values determined by the standard pattern.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, 12 types of standard patterns P1 to P12 are stored in the standard pattern file area 2b of the internal memory 2, but the types and external shapes are not particularly limited to such types, and the standard patterns By further increasing the number of types, it is possible to further diversify the rib electrodes (electric discharge machining electrodes) 10 'to be manufactured.

The means for inputting order data from the user may be something other than the keyboard 3, for example,
It is also possible to use a bar code reader or a character reader to allow the user to place an order simply by writing a mark or a number on the purchase order in a predetermined format.

Further, the rib electrode substrate 10 is not limited to the long plate-like one, but may be, for example, the standard patterns P1 to P1.
It may be a substrate processed to have the general outline of No. 2. Thereby, the processing time can be further shortened.

[0035]

As described above, in the method for producing an electric discharge machining electrode according to claim 1 of the present invention, the outer shape of the electric discharge machining electrode for a user is selected from the plurality of standard patterns stored in the storage means. A pattern selecting step of selecting, and a data input step of, after the pattern selecting step, inputting dimension data of each part of the selected standard pattern from the input means,
After this data input step, a machining control step in which the control means controls the operation of the machining means based on the inputted dimension data, and the machining means performs contour machining of the substrate of the electric discharge machining electrode in accordance with this machining control step. And a substrate processing step.

This makes it possible to standardize the production of electrodes for electric discharge machining, which are indispensable for precision machining such as deep groove machining for forming ribs, so that they can be individually handled. That is, without requiring a schematic drawing of the product mold maker, only by inputting the numerical values determined by the standard pattern from the input means, it is possible to manufacture the electric discharge machining electrode as ordered in a short time with high accuracy and efficiency. There is an effect that can be done.

According to a second aspect of the present invention, there is provided a method for producing an electric discharge machining electrode according to the first aspect, wherein the input dimension data is recorded in a recording means after the data input step. This is a configuration including a data recording step.

As a result, the data of the requested electric discharge machining electrode can be easily managed, and even if the user requests the electrode of the same specification again, the electrode can be manufactured quickly and accurately. Play.

According to a third aspect of the present invention, there is provided a method of producing an electric discharge machining electrode according to the first aspect of the present invention, in which, after the data input step, drawing drawing means is performed based on the input dimension data. Is a configuration including a drawing creation step of creating a drawing of the electric discharge machining electrode.

Thus, even if there is no schematic drawing from the product mold maker, a drawing of the electric discharge machining electrode can be easily created by contacting only the numerical values determined by the standard pattern. For this reason, in addition to shortening the commercialization of the electric discharge machining electrode according to claim 1, it is possible to shorten the preparation of the approval drawing of the electric discharge machining electrode, which leads to a large production lead time of the electric discharge machining electrode. The effect that it can be shortened to.

[Brief description of drawings]

FIG. 1 is a block diagram showing various components of an electric discharge machining system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an internal memory of the electric discharge machining system.

FIG. 3 is an explanatory diagram showing 12 types of standard patterns stored in a standard pattern file area of the internal memory.

FIGS. 4A and 4B are explanatory views showing dimension items stored in a substrate dimension file area of the internal memory.

FIG. 5 is a perspective view showing a rib electrode substrate cut by the electric discharge machining system.

FIG. 6 is a flowchart showing an electric discharge machining process of a rib electrode by the electric discharge machining system.

FIG. 7 is an explanatory diagram showing a setting screen of dimension items displayed on the CRT of the electric discharge machining system.

8 is a flowchart showing a cutting processing process in S7 in FIG. 6 described above.

FIG. 9A is a perspective view showing a state in which the rib electrode substrate is being cut by the electric discharge machine of the electric discharge machining system, and FIG. 9B is a cutting view of the rib electrode substrate. It is a perspective view which shows the electrode for ribs completed by.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CPU (control means), 2 ... internal memory (storage means), 3 ... keyboard (input means), 5 ... FDD (recording means), 6 ... XY plotter (drawing creation means), 7 ... electric discharge machine (Processing means), 10 ... Rib electrode substrate (substrate), 10 '... Rib electrode (electric discharge machining electrode)

Claims (3)

[Claims] 1. A pattern selection step of selecting an outer shape of an electric discharge machining electrode for a user from a plurality of standard patterns stored in a storage means, and each part of the selected standard pattern after the pattern selection step. A data input step of inputting the dimension data of the processing means from the input means, a processing control step of controlling the operation of the processing means by the control means based on the input dimension data after the data input step, and a processing control step associated with the processing control step. And a substrate processing step of externally processing the substrate of the electrode for electric discharge machining by a machining means. 2. The method for producing an electric discharge machining electrode according to claim 1, further comprising a data recording step of recording the input dimension data in a recording means after the data input step. 3. A drawing creating step of, after the data inputting step, creating a drawing of an electric discharge machining electrode by a drawing creating means based on the inputted dimensional data. Manufacturing method of electrical discharge machining electrodes.