JPH09300135A - Electrical discharging machining method for wire hole for wire electrical discharged machining and machining jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a useless work to be eliminated by a simple operation and further high quality and rapid electrical discharging operation to be performed. SOLUTION: A machining jig applied in the case that the electrical discharged machining wire holes H1 to H4 are formed by an electrical discharged machining is constructed such that position setting pins 5, 5 projected at a surface are arranged at both sides of a base block 3 on which a machined product raw material P is mounted and a section around a machining position is formed as a cavity 7. Through- pass holes P1, P1 passed through pins 5, 5 are formed at the product raw material P in such a way that the machining position may be located at the cavity 7. The machined product raw material P is mounted such that the projecting pins 5, 5 of the base block 3 are inserted into the through-pass holes P1, P1, wherein the electrical discharging is applied to the product raw material P under this state, i.e., a state in which its position is determined and fixed in right, left, forward or rearward directions and free set in a machining direction so as to form wire holes H1 to H4 for wire electrical discharged machining operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric discharge machining method for a wire hole for wire electric discharge machining and a jig for machining the same.

[0002]

2. Description of the Related Art For example, a component of a CRT (cathode ray tube) electron gun or the like has a plate thickness of 0.1 mm.
~ 0.7 mm stainless steel plate, nickel fenite plate,
Alternatively, a Kovar plate or the like is mainly used and is usually mass-produced by a press die or the like. However, in the electron gun prototype stage, the internal diameter and shape of various through holes of the parts of the electron gun, the distance between adjacent through holes and the distance between adjacent through holes, or the overall external shape are variously changed to improve the performance. Various tests such as tests are being conducted.

Therefore, if a press die for producing parts is newly produced each time in response to the design change, it takes a lot of time to produce the die, and the utilization efficiency of the die is low and the cost is low. It becomes high. Parts (prototype parts) that need to be redesigned several times, such as in the prototype stage, are manufactured individually by machining, electric discharge machining, or wire electric discharge machining without making a press die. Is common.

By the way, in the wire electric discharge machining, it is necessary to form a wire insertion hole through which a wire, which is an electrode of the wire electric discharge machining, is inserted, and this wire insertion hole may be formed by the electric discharge machining. In this case, FIG. 17 and XVII-XVII in FIG.
As shown in FIG. 18, which is a sectional view taken along a line, a jig 100 is pressed from both sides of a plurality of laminated product materials P and sandwiched between the product materials P.
Is fixed to the jig.

That is, as can be understood from FIG. 17 and FIG. 18, one product material P to three products A (FIG.
3 (see FIG. 15 and the like) (manufacturing a large number) and, for example, four wire insertion holes H1, H2, H3, H4 are formed for each of the products A, first,
A desired number of product materials P are stacked while being fixedly positioned on the jig 100.

When positioning and fixing the jig 100, the bolts 110 provided on the jig 100 are tightened so that the jigs 100 are provided at both end positions in the height direction of the jig 100.
A configuration is adopted in which a pair of iron plates (thickness: about 10 mm) 120, 120 holds the product material P from above and below with an appropriate pressing force, and in that state by electric discharge machining while cutting oil is sprayed on the processed part, Wire insertion holes H1, H
2, H3, H4 drilling work is performed.

[0007]

However, in such a jig (hereinafter referred to as "jig 1"), at least the upper iron plate 12 of the upper and lower iron plates 120, 120 in FIG.
0 is electric discharge machined at the same time and wire insertion holes H1 and H
2, H3, H4 are cut, so the upper iron plate 120
However, each time the design is changed, the product A becomes disposable, the manufacturing cost of the product A increases accordingly, and unnecessary electric discharge machining is performed on the iron plate 120, so it takes extra time for electric discharge machining,
There is a problem that it is not possible to respond promptly to test work.

As a method for solving this problem, FIG.
As shown in FIG. 20 which is a sectional view taken along the line IXX-IXX in FIG. 19, a pair of iron plates 210, 210 used in the jig 200 are provided with openings 2 corresponding to the electric discharge machining portions.
It is conceivable to use a jig having a structure in which 20 is formed, and the peripheral portions of the product material P laminated on the pair of iron plates 210, 210 are sandwiched and fastened by bolts 110.

However, in the electric discharge machining using this jig (hereinafter referred to as "jig 2"), since the opening 220 is formed in the jig, the electric discharge machining unnecessary for the iron plate 120 like the jig 1 is performed. Since it is not necessary to perform the above, it is possible to avoid the inconvenience caused by performing the electric discharge machining on the iron plate 120, but FIG. 2 and FIG. 2 showing a sectional view taken along the line XXI-XXI in FIG.
As can be understood from 2, the electric discharge machining portion of the product material P gradually becomes larger as it becomes the product material P laminated on the lower side.
It has been confirmed by the present inventor that a new problem arises in that it cannot be manufactured with good quality.

In order to cope with this new problem, as shown in FIG. 23 and FIG. 24 showing a sectional view taken along the line IIXXV-IIXXV in FIG. 23, one product is used instead of the opening 220 of the jig 200. A pair of iron plates 310, 310 used in the jig 300 are provided with three openings 330, 330, 330 partitioned by side walls 320 so that one opening for electrical discharge machining corresponds to A. It is conceivable to use a jig that is formed and clamps the pair of iron plates 310, 310 with bolts 110 to hold and fix the peripheral portion of the laminated product material P.

However, in the electric discharge machining using this jig (hereinafter referred to as "jig 3"), the dents generated in the jig 2 are eliminated, but the product material P is wavy over the entire length. It has been confirmed by the present inventor that a new problem that a defective phenomenon of being deformed occurs occurs.

The present invention has been made in view of the above problems, and provides an electric discharge machining method of a wire hole for wire electric discharge machining and a jig for machining the same, which is capable of performing high-quality and quick electric discharge machining with a simple operation, eliminating waste. The purpose is to do.

[0013]

SUMMARY OF THE INVENTION The above object is to provide a jig in which a hollow is formed around a machining position and a positioning means that is free in the machining direction is formed on the surface side on which a product material to be machined is placed, Wire electric discharge machining, characterized in that a plurality of product materials to be processed are loaded on the jig according to the positioning means, and the loaded product materials are discharged to form holes in the loaded product materials. This is achieved by using an electric discharge machining method for a wire hole.

Further, according to the above-mentioned object, a jig for electric discharge machining is characterized in that a protruding pin for positioning the product material to be processed is formed on the surface on which the product material to be processed is placed with a hollow around the machining position. To be achieved.

According to the above feature of the present invention, each of the plurality of product materials to be subjected to the wire electric discharge machining, which are stacked on the jig, is free in the machining direction, and during the electric discharge machining,
The pressure of the cutting oil entering between the loads escapes from the gap between the loads and the product material is not deformed. Therefore,
Since the periphery of the machining position is hollow, the jig is not wasted and high-quality electric discharge machining can be performed quickly.

Further, in the jig provided with the protruding pin for positioning the product material on the surface, a through hole for inserting the protruding pin is previously formed in the product material to be subjected to wire electric discharge machining, and the through hole is formed. A plurality of the product materials thus formed are inserted into the projecting pins through the through holes, and a plurality of the product materials are stacked on the jig, and the electric discharge machining is performed in this state. Even in this case, each of the product materials is free in the processing direction and can enjoy the same effects as the above.
The work of placing the product material on the jig becomes extremely easy.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the electric discharge machining method of a wire hole for wire electric discharge machining and the machining jig thereof according to the present invention will be described below with reference to the drawings. FIG.
2 is a plan view of an electric discharge machining jig according to the present invention, FIG. 2 is a sectional view taken along line I-I in FIG. 1, and as can be understood from FIGS. 1 and 2, the electric discharge machining jig 1 is Substantially rectangular base 3
Is provided, and rod-shaped projecting pins 5 and 5 projecting from the surface are provided at both ends in the longitudinal direction of the base 3, and the central portion of the base 3 is along the longitudinal direction of the base 3. At the same time, a cavity 7 is formed so as to penetrate the base 3 in the thickness direction.

The jig 1 for electric discharge machining is a wire electric discharge machine in a machining stage before wire electric discharge machining (refer to FIG. 12 etc.) is applied to a product material P to be subjected to wire electric discharge machining (refer to FIG. 9 etc.). It is a jig used for forming wire insertion holes H1, H2, H3, H4 (see FIG. 8 etc.) for inserting a wire (not shown) used in the above by electric discharge machining.

The electric discharge machining by the electric discharge machining jig 1 is as follows.
In order that the processing position where the wire insertion holes H1, H2, H3, and H4 are processed is located in the cavity portion 7, the protruding pin 5,
The product material P having a through-hole through which 5 is inserted is inserted into the through-hole and the projecting pins 5 and 5 are inserted to be stacked on the base 3. The electric discharge machining is performed in a free state in which the positioning is fixed and the machining direction is not fixed.

As described above, in the electric discharge machining jig 1 of this example, since the projecting pins 5 and 5 simply have a function of holding the positioning of the product material P, the cutting oil used during electric discharge machining is used. When a pressure is applied to the cutting oil, the cutting oil can freely move to the outside of the product material P, so that the product material P can be prevented from being dented or wavy.
It is possible to manufacture high quality products. In addition, since the machining position is the hollow portion 7, the iron plate 11 is different from the conventional one.
As compared with the case where 0 is used, the disposable iron plate 110 is not required, so that the manufacturing cost of the product formed from the product material P can be reduced.

In the electric discharge machining jig 1 of this example, the projecting pins 5 and 5 are provided as positioning means for the product material P,
Although the size of the product material P and the variation in the processing position for each product material P can be dealt with, the outer periphery of the product material P may be abutted to position and fix the left and right front and rear directions.

Next, an example of the electric discharge machining method of the wire hole for wire electric discharge machining according to the present invention using the jig 1 for electric discharge machining described above will be described. First, in the first step, the simple perforator 2 shown in FIG. 3 and FIG. 4 showing a sectional view taken along the line III-III in FIG. 3 is used and cut into a predetermined length by a known means. The product material P
A pair of through holes (reference holes) P1 and P1 are formed at positions in the longitudinal direction of the product material P and at positions separated by a predetermined distance, and the separated distance is 1 provided in the electric discharge machining jig 1.
The distance between the pair of pin portions 5, 5 is set to be the distance.

In this case, the simple punching machine 2 uses the product material P
Has a lower die 4 on which is mounted, and guide members 6, 8, 10, 12 provided at the widthwise position and the longitudinal position of the lower die 4 for guiding the product material P. Cage,
The guide members 6, 8, 10 and 12 are attached to the lower die 4 by attachment bolts 20, respectively.

Further, together with the guide member 10 provided in the length direction of the lower die 4, the guide pin 14 for guiding the product material P placed on the lower die 4 is provided with the guide member 1.
It is provided so as to project from the lower die 4 at a position opposed to 0 and apart from the guide member 10 by a predetermined distance, and in the vicinity where the guide member 10 contacts the product material P. Is an upper die punch 16, and a die cutting edge portion having an appropriate clearance (gap) with the tip die edge portion 15 of the upper die punch 16 for forming the through hole P1 in the product material P together with the upper die punch 16. A known punch mechanism 30 having holes 17 and scrap drop holes 18 is provided.

Then, the guide member 10 and the guide pin 14
Is set so that the through holes P1 and P1 are formed in the product material P at positions separated by a predetermined distance. As a setting method therefor, a pair of through holes P1 and
In the process of forming P1, first, one through hole P1 is formed and the one through hole P1 is inserted into the guide pin 14, or the through hole P is formed at the tip of the guide pin 14.
The outer dimensions of the guide pin 14 are set so that the first pin 1 may be caught, and the other through hole P1 is punched in the punch mechanism 3 with the through hole P1 positioned at the projecting position of the guide pin 14.
There may be mentioned a structure formed by 0.

In this example, the through holes P1 and P
The inner diameter of 1 is set to 5 mm, so that the pin parts 5, 5
Is set to be slightly smaller than the inner diameters of the through holes P1 and P1, and the pin portions 5 and 5 are formed in the through holes P1 and P1.
However, the value of the inner diameter of the through hole P1 (outer dimension of the pin portion 5) is such that the pin 5 is inserted into the through hole P1 and the product material P is positioned and placed on the base 3. Value can be selected appropriately,

Next, in the second step, as understood from FIG. 5 and FIG. 6 which is a sectional view taken along line VV in FIG. 5, the pins 5 and 5 are inserted into the through holes P1 and P1, The product material P is positioned and placed on the base 3, and in this example, 3
About 0 product materials P are stacked and set on the electric discharge machining jig 1.

Further, in this example, since three products A, A, A are formed from one product material P (multi-cavity production), the number of wire insertion holes required for wire electric discharge machining is 1
It is set so that the required number is formed for each product A. In this case, for each product A,
In FIG. 5, wire insertion holes are formed at the portions indicated by points A1, A2, A3, and A4.

Next, in the third step, FIGS. 7, 9 and 9 showing sectional views taken along line VII-VII in FIG. 7 and FIG.
As shown in FIG. 10 which is a sectional view taken along the line IX-IX in FIG. 10, the wire insertion holes H1 and H are respectively associated with the positions A1, A2, A3, and A4 of the product A.
2, H3, H4 are formed by electrical discharge machining.

In this case, formation of the wire insertion holes H1, H2, H3, H4 by electric discharge machining is performed by known means, and the wire insertion holes H1, H2, H3 are
A wire is inserted to form a desired hole (see FIGS. 13 to 16) in the product A, while a wire is inserted into the wire insertion hole H4 to process the outer shape of the product A into a desired shape. Is set to.

Next, in the fourth step, FIG. 11 and FIG.
As can be seen from FIG. 12 showing an enlarged view of the B part in 1, wire insertion holes H1, H2, H3, H4 are respectively inserted wires for wire electric discharge machining (not shown),
Known wire electric discharge machining is performed.

That is, the wire insertion holes H1, H2, H
Desired holes C1, C2, C3 are formed in the product A by the discharge wire inserted through the wire 3, and the product A is formed into a desired external shape by the discharge wire inserted through the wire insertion hole H4. Then, the product material P is cut out.

13 and IIXV- in FIG.
FIG. 14 showing a sectional view taken along the line IIXV shows the product A formed by the fourth step, and the outer shape of the product A or the shape, size, and hole of the holes formed in the product A. The distance between the hole and the hole is appropriately selected in accordance with the electron gun component etc. in which the product A is used.
15 and FIG. 16, which is a cross-sectional view taken along line XV-XV in FIG. 15, show a product A in which holes D1, D2, D3 having other shapes are formed.

As described above, in this example, the base 3
The electric discharge machining jig 1 in which the hollow portion 7 is formed is used,
In the first step, through holes P1, P for positioning the product material P
1 is formed, then in the second step, the projecting pins 5 and 5 of the base 3 are inserted into the through holes P1 and P1 for positioning, and the product material P is positioned and placed on the base 3. Is retained.

Then, in the third step, a wire insertion hole H through which a wire used in wire electric discharge machining is inserted.
1, H2, H3, H4 are formed by electrical discharge machining in a number corresponding to the number required during wire electrical discharge machining, and in the fourth step, by the electrical discharge wire inserted into the wire insertion holes H1, H2, H3, Desired holes C1, C2, C3 are formed in the product A, and the product A is cut into a desired outer shape by the discharge wire inserted into the wire insertion hole H4.

In the above example, the product A used for the electron gun parts of the television set has been described. However, the wire electric discharge machining method and the electric discharge machining jig according to the present invention are products manufactured by wire electric discharge machining. When it is formed, it can be widely applied.

[0037]

As described above in detail, according to the present invention, each of the plurality of product materials to be wire-discharge machined, which are stacked on the jig, is free in the machining direction. During hole electric discharge machining, the pressure of cutting oil that invades between the stacks escapes from the gap between the stacks and does not deform the product material. Therefore, cost reduction can be achieved and high-quality electric discharge machining can be performed quickly.

[Brief description of drawings]

FIG. 1 is a plan view of a preferred example of a jig for wire electric discharge machining according to the present invention.

FIG. 2 is a sectional view taken along line II in FIG.

FIG. 3 is a plan view showing a configuration of a hole punching machine in a first step of a method of electric discharge machining a wire hole for wire electric discharge machining according to the present invention when the jig for electric discharge machining shown in FIG. 1 is used.

4 is a sectional view taken along line III-III in FIG.

FIG. 5 is a plan view showing a second step of the electric discharge machining method for wire holes for wire electric discharge machining according to the present invention.

6 is a cross-sectional view taken along line VV in FIG.

FIG. 7 is a plan view showing a third step of the electric discharge machining method for wire holes for wire electric discharge machining according to the present invention.

8 is a sectional view taken along line VII-VII in FIG.

FIG. 9 is a plan view of a product material obtained by electric discharge machining in a third step of the electric discharge machining method for wire holes for wire electric discharge machining according to the present invention.

10 is a sectional view taken along line IX-IX in FIG.

FIG. 11 is an explanatory diagram showing wire electric discharge machining.

FIG. 12 is an enlarged view of part B in FIG.

FIG. 13 is a plan view of an example of a product obtained by wire electric discharge machining.

14 is a sectional view taken along line IIXV-IIXV in FIG.

FIG. 15 is a plan view of another example of a product obtained by wire electric discharge machining.

16 is a sectional view taken along line XV-XV in FIG.

FIG. 17 is a plan view showing a conventional electric discharge machining method for wire holes for wire electric discharge machining.

18 is a sectional view taken along line XVII-XVII in FIG.

FIG. 19 is a plan view showing an example of an electric discharge machining method of a wire hole for wire electric discharge machining for explaining the problems of the present invention.

20 is a cross-sectional view taken along the line IXX-IXX in FIG.

21 is a plan view of a product material obtained by the electric discharge machining method of FIG.

22 is a cross-sectional view taken along the line XXI-XXI in FIG. 21.

FIG. 23 is a plan view showing another example of the electric discharge machining method of the wire hole for wire electric discharge machining for explaining the problem of the present invention.

FIG. 24 is a sectional view taken along the line IIXXV-IIXXV in FIG. 23.

[Explanation of symbols]

1 Electric discharge machining jig 2 Hole punching machine 3 Base 4 Lower die 5 Projecting pin 6, 8, 10, 12 Guide member 7 Cavity 10 Bolt 14 Guide pin 16 Upper die punch 18 Scrap drop hole 30 Punch mechanism P Product Material P1 Through hole (reference hole) A Product A1, A2, A3, A4 Wire insertion hole forming position H1, H2, H3, H4 Wire insertion hole C1, C2, C3, C4 Product extraction hole D1, D2, D3, D4 Product Extraction hole (other shapes)

Claims (2)

[Claims] 1. A jig having a hollow around the machining position, on which a product material to be machined is placed, and a jig having free positioning means in the machining direction formed on the surface side of the product material, to be subjected to wire electric discharge machining A method of electrical discharge machining a wire hole for wire electrical discharge machining, comprising: loading a plurality of pieces on the jig according to the positioning means, discharging the loaded product material to form holes in the loaded product material. 2. A jig for electrical discharge machining, characterized in that a hollow is formed around a machining position and a projecting pin for positioning the product material to be machined is formed on a surface on which the product material to be machined is placed.