KR20050118941A - Punching die-set for making holes on sidewall of parts - Google Patents

Abstract

The present invention relates to a metal mold punching device for drilling the side wall holes such as electronic components; Forming a shaped body as a thin metal plate and constructing a progressive mold for carrying out a continuous process for processing a part (PT) requiring perforation on the sidewall of the molded body, and mold perforating for perforation on the sidewall accommodated in the progressive mold A mold drilling apparatus for drilling sidewall holes, such as an electronic component having a device, comprising: The mold drilling apparatus P2 is a linear slide drilling number for performing continuous linear drilling after molding the sidewall of the component PT to be processed, and the mold drilling apparatus P2 is a molding die 10. The stripper 22 and the cam base 30 having a lower die assembly 2 having a lower portion and a counter die portion 21 for press punching molding the molding die 10 are elastically supported by guide bars or the like. A progressive press operation is performed, and the drive cam bar 33 having an end cam inclined surface 33 ′ fixed downward to the cam base 30, and a stripper 22 elastically guided below the cam base 30. It is characterized in that the mold punching device (P2) is stored in a straight line with respect to the forming die (10) to perform a linear drilling; Mold fabrication factory for drilling of side wall holes, such as electronic components of the present invention; By improving the mechanical design of the general configuration of the conventional mold drilling apparatus, the drilling with a very high degree of processing is possible.

Description

Punching die-set for making holes on sidewall of parts

The present invention relates to a metal mold punching device for the punching of side wall holes, such as electronic components, and more particularly, to punch and carry out a punching hole, which is a punched body on one side wall, for a press-formed body which is press-processed to various electronic parts and even mechanical parts. The present invention relates to the provision of a mold drilling apparatus of a suitable configuration.

In the case of an electronic component or a mechanical component, a process of manufacturing a metal plate of a thin plate and manufacturing it in a shaped housing or the like is necessary for producing a component.

In addition, depending on the shape and use of electronic parts or mechanical parts, it is often necessary to design the press-formed housing shape by forming sidewall holes such as adjustment holes or fastening holes in the sidewalls of the molded body. have.

For example, in the case of an electron gun for a cathode ray tube, there is a grid electrode for restricting the path of the electron beam and scanning for each color. The grid electrode is usually formed by pressing a thin metal plate into a hexahedral housing shape.

Furthermore, the adjustment hole for position adjustment and deflection control at the time of assembling the electron gun should be drilled on the side wall of the housing-shaped grill electrode as a fine diameter circular hole.

The part having the side hole on the side wall of this exemplary configuration is formed by inserting a mold cloth mill, which is an operating mechanism for processing the side wall hole, in a mold for press work to form a shape in order to simplify the process and improve the precision. It uses a so-called progressive mold that organizes the work and the drilling work in a continuous sequence.

For this purpose, a mold punching device, which is a mold assembly having a variety of configurations, has been provided for drilling of side wall holes such as electronic parts, and most of the configurations are constructed through punching pins having slides moving from the side of the forming die to be pressed. there was.

However, this configuration has the advantage of being relatively simple to manufacture, but it is difficult to perform linear drilling on the sidewalls of the parts to be processed. Many kinematic problems have been found, including early wear of the pins.

The metal mold punching device for drilling the side wall holes, such as the electronic component of the present invention is to provide a mold punching factory of a newly provided configuration in view of the problems of the conventional metal mold punching device for drilling the side wall holes.

In the following description of the present invention will be described in detail the configuration of the present invention as compared with the problem of the configuration of the mold punching device for the drilling of side wall holes, such as conventional electronic components.

In order to achieve the above-mentioned object, a mold punching mill for drilling of sidewall holes, such as the electronic component of the present invention;

Forming a shaped body as a thin metal plate and constructing a progressive mold for carrying out a continuous process for processing a part (PT) requiring perforation on the sidewall of the molded body, and mold perforating for perforation on the sidewall accommodated in the progressive mold A mold drilling apparatus for drilling sidewall holes, such as an electronic component having a device, comprising:

The mold punching mill is characterized in that the basic slide is a linear slide drilling means for performing a continuous linear drilling after molding the side wall of the component to be processed.

In addition, the mold fabrication factory has a lower die assembly having a molding die and a stripper having a counter die portion for press punching molding the molding die, the cam base is elastically supported by a guide bar or the like to perform progressive press operations sequentially. ,

The driving cam bar having an end cam inclined surface fixed downward to the cam base, the mold punching device is stored in a straight line with respect to the stripper is elastically guided below the cam base to perform a linear drilling of the forming die It is a constructive feature.

In addition, the die fabric mill driven linearly with respect to the molding die is formed by integrally shaping the drill pin of the reduced diameter and the anti-rotation guide pin to the stripper at the straight end and integrally formed with the reduced diameter. A slide bar, a cam inclined surface cooperating with a cam inclined surface of the drive cam bar at an opposite end of the slide bar, a return spring for elastically guiding the slide bar, a receiving portion of a stripper for accommodating the slide bar, It is characterized by the operation configuration that the cam entry part to which the cam slanting surface enters and retracts comprises a bar base formed in the notch shape.

With reference to the accompanying drawings, the mold fabrication factory for the perforation of the side wall holes, such as electronic components of the present invention will be described in more detail in comparison with the conventional configuration.

1 is a side view showing an exemplary configuration of an electron gun which is an electronic component suitable for application of a metal mold punching device for drilling of sidewall holes, such as the electronic component of FIG. 1 of the present invention; An example application is described as a partial perspective view showing the configuration in a strip state,

Fig. 3 is an external perspective view showing the external configuration of a mold main body having a mold fabrication factory for perforating sidewall holes such as electronic parts of the present invention. Figs. 4A and 4B are dies for perforating sidewall holes of conventional electronic parts. Longitudinal sectional view and enlarged view of the entire mold showing the configuration of the punching device, FIG. 5 is an enlarged photograph showing the problem of the molded body punched using the mold punching mill of FIG.

Fig. 6 is a longitudinal sectional view of the mold body showing the structure of a mold drilling apparatus for drilling side wall holes, such as the electronic part of the present invention of Fig. 6, an enlarged cross-sectional view of part A of Fig. 6 of Fig. 7, and a hole of the drilling hole according to the present invention of Fig. 8 The enlarged photograph showing the front side demonstrates the structure and effect of the present invention.

An electron gun assembly G is shown as an exemplary electronic component in FIG. 1, and the grid electrode G1, G2, G3 .. as a plurality of electron lenses is provided as the main component in the electron gun assembly G. As shown in FIG.

The grid electrodes G1, G2, G3 .., which may be of various shapes and sizes, are formed by pressing and bending a thin metal plate of a thin plate, as shown in FIG. 2, and partially expanding the portion of FIG. As shown in the figure, the adjusting hole H for adjusting the gap in the electron gun assembly G is drilled and processed.

In order to drill the control hole H, the grid electrodes G1, G2, and G3 .. may be first formed by pressing and peeled from the mold, but may be punched for production line, processing accuracy, and uniformity. It is preferable to process through a progressive process of forming a mold fabrication factory operating in the mold and punching in a continuous continuous processing process after press processing.

For this purpose, the configuration of the mold drilling apparatus, which has been widely used in the art, will be described with reference to FIGS. 3 to 5.

In the present invention, a part of the mold F installed in a press machine having an appearance shown in FIG. 3 and performing a press process to form a shape of a part such as the basic grid electrodes G1, G2, and G3 .. The mold punching device P, which is a main part, is assembled and its cross-sectional configuration is shown in Figs. 4A and 4B. Such molds are widely known as progressive-die by performing continuous operations.

The lower assembly 2 which is fixed on the base 1 and the upper assembly 3 of the upper part are largely divided.

In the center portion of the lower die 2, a molding die 10 is placed as a mold for molding parts.

 The stripper 22 having the counter die portion 21 for performing the actual press punching molding through the guide bar 20 showing only one upper portion to perform the role of the punch holder in the upper upper base 24. It is also fixed through the spring 26 by a connecting bar 25 showing only one.

As shown in the cam base 30, which is guided by the guide bar 20 with respect to the stripper 22, the driving cam bar 33 having a cam inclined surface 33 'at the end is erected downward. It is installed.

With this configuration, when the stripper 22 is lowered, the cam base 30 descends together by a predetermined distance, and is then guided by the guide bar 20 after pressing the stripper 22 to the elasticity of the spring (not shown). As you fight, you descend further.

Such a configuration is a mechanism widely known in general progressive molds.

In addition, the drive cam bar 33 mounted upright on the side of the cam guide bar 31 is further advanced. As shown, an end portion of the driving cam bar 33 has a cam slanting surface 33 'formed at a cross section, and is used as a cam mechanism, and a molding die 10 having a cooperating mechanism mounted on the center portion of the lower die 2 is shown. ) Is a metal mold punching device (P1) is driven forward and backward.

The die punching device P1 has a roughly " a " shaped punching pin 50 which moves forward and backward with respect to the molding die 10 in the lower die 1, as shown in Fig. 4B. 50 is integrally formed with the pin holder block 53 protruding upward from the guide block 52 moving along the guide rail 11 formed in the molding die 10, or separately processed and fixed. At the rear end of the block 52, a cam inclined surface 52 'is formed which cooperates with the drive cam bar 33 to perform a cam operation.

With this configuration, the driving cam bar 33 sequentially descending at the time when the press molding processing of the part PT is finished is continuously lowered, and the cam inclined surface 33 'of the driving cam bar 33 is the guide block 52. By pushing the cam inclined surface 52 'of the rear end portion of the back side toward the component PT side, the drilling pin 50 cooperates with the die hole 10' of the forming die 10 to punch out the component PT. Will be done.

The conventional metal mold punching device P1 having the above-described configuration has been found to be relatively simple in structure but has serious problems as follows.

(1) First, the mold punching device P1 moves forward and backward along the guide rail 11 with respect to the forming die 10 in the lower die 1 as shown in an enlarged view. Since the drilling pin 50 fixed to the pin holder block 53 above the) performs the drilling on the parts PT, when viewed microscopically, the drilling pin 50 becomes a cantilever with a cantilever and has a curvature with respect to the drilling position. Perform the operation with (R).

As a result, burrs and the like are more likely to be caused on the machining surface than the punching by the linear motion with respect to the component PT. This is an enlarged photograph of the punching portion punched after the conventional mold drilling apparatus P1 of FIG. As can be seen, it can be seen that a plurality of burrs are formed in the inner circumference of the perforated control holes.

(2) In addition, the drilling pin 50 is very small in diameter and must be molded by hand in order to meet the dimensional accuracy thereof, but it is easy to cause the pin to be broken by an operation having a repeated radius of curvature. Much labor is required.

In addition, due to the necessity of cutting by manual work, it is impossible to form the drill pin 50 by cemented carbide, which causes the life of the drill pin 50 to be shortened.

The mold drilling apparatus P2 of the present invention having an improved configuration will be described in more detail below with reference to FIG. 6 in view of the problems of the mold drilling apparatus for drilling sidewall holes such as the conventional electronic components described above.

As shown in FIG. 6 and below, the die punching device P2 of the present invention attempts to solve the conventional problems by changing the cantilever configuration of the above-described conventional configuration to a linear operation configuration.

The other part is the same as the conventional mold F, but the cam base 30 is elastically supported and guided by the guide bar 20 with respect to the stripper 22 having the above-mentioned configuration. The configuration in which the drive cam bar 33 having the cam inclined surface 33 'at the end of 30 is erected downward is the same.

Accordingly, the metal mold drilling apparatus P2 of the present invention also has a manner of being driven as a cam operation in cooperation with the drive cam bar 33 having the cam inclined surface 33 '.

As in the enlarged cross-sectional view of Figs. 6 and 7,

The slide bar 70 is guided to and received by the stripper 22.

As shown in the drawing, the slide bar 70 is formed by machining the drilling pin 71, which is a drilled portion having a reduced diameter at its end, into an elongated shape, and is easily formed of a cemented carbide or the like.

On the outer circumferential side of the slide bar 70, a guide fin, which is a long lateral protrusion for preventing rotation and guiding the slide operation, is formed integrally with one end, and at the end, the cam of the driving cam bar 33 is formed. A cam slope 70 'for cooperating with the inclined surface 33' is formed.

The slide bar 70 is elastically accommodated in the spring storage portion 76 by the return spring 75, the slide bar 70 is a bar base 80 that is a receiving space portion for mounting and receiving the slide bar 70 to accommodate The cam entry part 81 into which the cam inclined surface 33 'of the driving cam bar 33 mentioned above enters and retracts is inserted in the front part of the base, and the back of the bar base 80 is comprised in the notch shape. The cam inclined surface 70 'of the slide bar 70 protrudes behind the portion 81.

As described above, the slide bar 70 moves in accordance with the lowering of the driving cam bar 33.

When the press forming processing of the parts PT is primarily finished, the driving cam bar 33 which descends sequentially continues to descend,

The cam inclined surface 33 'of the driving cam bar 33 starts to enter the cam inlet 81 of the bar base 80 while pushing the cam inclined surface 70' of the slide bar 70 to slide the slide bar 70. To enter the molding die 10 side while overcoming the elastic force of the return spring 75 to cooperate with the die hole 10 'of the molding die 10 to perform perforation.

In the above-described operation, the slide bar 70 makes a linear movement with respect to the forming die 10, and thus the operation reliability is very high and the degree of processing is high.

The shape of the perforated body perforated on the side wall of the component as the mold punching device P2 of the present invention is shown in the picture in Fig. 8, in the picture, it can be seen that the cut hole of the periphery of the inner periphery is cleanly finished. have.

A mold cloth mill for drilling of side wall holes such as an electronic component of the present invention having the above configuration; By improving the mechanical design of the general configuration of the conventional mold drilling apparatus,

It is possible to drill extremely high degree of processing, and can easily process cemented carbide to be used as a drilling pin, thereby increasing the life and increasing productivity.

In addition, as the lifespan increases, the replacement cycle of the perforated part also becomes longer, thereby increasing the unit production capacity.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view showing an exemplary configuration of an electron gun which is an electronic component suitable for applying a metal mold punching device for drilling sidewall holes such as an electronic component of the present invention.

Fig. 2 is a partial perspective view showing the configuration in a state in which a machining strip is caused during molding of an electronic component which is optimal for application of a metal mold punching device for drilling sidewall holes such as an electronic component of the present invention.

Fig. 3 is an external perspective view showing the external appearance of a mold body incorporating a mold cloth mill for drilling sidewall holes such as electronic parts of the present invention.

Fig. 4A is a longitudinal sectional view of an entire mold showing the structure of a mold drilling apparatus for drilling side wall holes such as a conventional electronic component.

4B is an enlarged cross-sectional view of the portion A of FIG. 4.

Fig. 5 is an enlarged photograph showing a problem of a punched hole part using a mold punching mill for punching side wall holes such as an electronic component having a conventional configuration.

Fig. 6 is a longitudinal sectional view of a mold body showing the structure of a mold drilling apparatus for drilling side wall holes such as an electronic part of the invention.

Fig. 7 is an enlarged cross-sectional view of the portion B of Fig. 6 showing the main portion of a mold drilling apparatus for drilling side wall holes, such as an electronic component of the present invention.

Fig. 8 is an enlarged photograph showing the front surface of a punching hole portion of a molded body punched in accordance with a mold punching device for punching sidewall holes such as an electronic part of the present invention.

* Explanation of symbols for the main parts of the drawings *

10; Molding die

21; Counter die part

22; Stripper

30; Cam base

33; Drive Cambar

Claims (4)

Forming a shaped body as a thin metal plate and constructing a progressive mold for carrying out a continuous process for processing a part (PT) requiring perforation on the sidewall of the molded body, and mold perforating for perforation on the sidewall accommodated in the progressive mold A mold drilling apparatus for drilling sidewall holes, such as an electronic component having a device, comprising: The metal mold punching device (P2) is a linear slide drilling means for performing a continuous linear drilling after molding the side wall of the component (PT) to be processed, the metal mold for drilling the side wall holes, such as electronic components Perforation device. The method of claim 1, The mold punching device P2 has a lower die assembly 2 having a molding die 10 and a stripper 22 having a counter die portion 21 for press punching molding the molding die 10, and a cam. The base 30 is elastically supported by a guide bar or the like to sequentially perform progressive press operations, The drive cam bar 33 having an end cam inclined surface 33 ′ fixed downwardly to the cam base 30 and a stripper 22 elastically guided below the cam base 30 are stored in a straight line. A metal mold punching device for punching sidewall holes, such as electronic parts, characterized in that the metal mold punching device (P2) for performing the punching linearly to the molding die (10). The method according to claim 1 or 2, The mold punching device P2 which is linearly driven with respect to the molding die 10, The slide bar 70, which is accommodated in the stripper 22, is linearly guided, and integrally forms a reduced diameter punching pin 71 and a rotation preventing guide pin 77 at a reduced diameter in a reduced diameter. A cam inclined surface 70 'cooperating with a cam inclined surface 33' of the drive cam bar 33 at an opposite end of the slide bar 70, Return spring 75 to elastically guide the slide bar 70, The bar is formed in the notch shape of the receiving space portion of the stripper 22 for accommodating the slide bar 70 and the cam entrance portion 81 into which the cam inclined surface 33 'of the driving cam bar 33 enters and retracts. Mold drilling apparatus for drilling of side wall holes, such as electronic components, characterized in that it comprises a base (80). The method of claim 3, wherein The slide bar (70) having the drill pin 71 of the reduced diameter integrally processed is a mechanical workpiece of a cemented carbide material, the metal mold punching device for drilling the side wall holes, such as electronic components.