JPH0522346Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a material shifting mechanism for positioning the material in a press machine for punching out precision parts such as IC lead frames.

[Conventional technology]

Conventionally, there are molds shown in FIGS. 4 to 6 that are used when punching IC lead frames and the like using a press.

In these figures, reference numeral 1 indicates an upper mold, and reference numeral 2 indicates a lower mold.

The upper mold 1 has five plates 1a, 1b,
It has a five-layer structure consisting of plates 1c, 1d, and 1e, and there is a gap between plate 1c and plate 1d, and a spring (not shown) is provided in this gap. Inside the upper mold 1 is a middle punch 4...
is provided along the longitudinal direction of the center of the lower surface 3. This middle punch 4 is for punching out material by protruding from the lower surface 3 of the upper mold 1 (the lower surface of the plate 1e) during stamping, and the mounting structure of the middle punch 4 is as follows. That is,
As shown in FIG. 4, the upper part of the middle punch 4 is fixed to the plate 1c of the upper mold 1, and the middle punch 4 is attached to be movable up and down within the plates 1d and 1e.

Further, a plurality of notches 5 are formed in the center of the lower surface 3 of the upper mold 1 along the longitudinal direction of the lower surface 3. On the lower surface 3 adjacent to these notches 5,
Pilot pins 6 are formed that protrude from the lower surface 3 and are used to position the material during stamping.

The lower mold 2 has a three-layer structure consisting of three plates 2a, 2b and 2c. On the plate 2a, dies 7 corresponding to the medium punches 4 are provided along the longitudinal direction of the center of the upper surface 8 of the lower mold 2 (the upper surface of the plate 2a).

Further, in the center of the upper surface 8 of the lower mold 2, a guide plate 10 having an L-shaped cross section is provided along the longitudinal direction of the upper surface 8 for guiding both sides of the strip-shaped material 9 along the longitudinal direction. A guide plate 10 is provided.
There is a clearance between the material 9 and the material 9. The upper mold 1 is placed on the upper surface 8 adjacent to the guide plate 7.
Holes 11 are formed to fit with the pilot pins 6.

The material 9 is punched out using the upper die 1 and the lower die 2 having the above configuration as follows. That is, a strip-shaped material 9 is fed to the upper surface 8 of the lower mold 2 from the left side as shown in FIG. 6 while being guided by guide plates 10 on both sides. Then, the upper mold 1 descends as the upper ram (not shown) descends, and the pilot pins 6 of the upper mold 1 pass through the pilot holes 12 of the material 9 and enter the holes 11 of the upper surface 8 of the lower mold 2. ... and the lower surface 3 of the upper mold 1 and the upper surface 8 of the lower mold 2 sandwich the material. At this time, the guide plates 10 of the lower mold 2 fit into the notches 5 of the upper mold 1, so the guide plates 10 do not interfere with the above-mentioned clamping. In this way, the material 9 is positioned and fixed to the upper mold 1 and the lower mold 2. Furthermore, when the upper surface of the plate 1a of the upper mold 1 is pushed downward,
The plate 1c is lowered, causing the middle punch 4 to protrude from the lower surface 3 of the upper die 1 and punch out the material 9. Then, after the upper mold 1 rises, the material 9
is sent to the left in the longitudinal direction of the upper surface 8 of the lower mold 2 by a predetermined distance. Similarly, by repeating this operation, a desired shape is punched out from the band-shaped material 9.

[Problem that the invention attempts to solve]

By the way, there is a clearance between the guide plates 10 that guide both sides of the material 9 and the material 9, so when the material 9 is fed, the material 9 meanders in a direction perpendicular to its longitudinal direction. Therefore, when punching the material 9, the pilot pins 6 for accurately positioning the material 9 are difficult to penetrate into the pilot holes 12 of the material 9, and the pilot pins 6 are difficult to penetrate into the pilot holes 12 or the vicinity of the pilot holes 12. There was a problem in that it was difficult to accurately position the material 9 because the surface of the material was damaged.

[Purpose of invention]

This invention was made in order to solve the above-mentioned problems, and its purpose is to provide a material shifting mechanism in a press machine that can accurately position the material in the mold.

[Means to achieve the purpose]

This idea is based on a reference plate provided on one side of the material conveyance path on the upper surface of the lower mold among the upper and lower molds that approach and separate from each other, and a reference plate provided on the upper surface of the lower mold to A holding member is provided on the other side of the material conveyance path and is movable in the direction toward and away from the reference plate, and a holding member is provided on the lower surface of the upper mold to hold the material by the upper and lower molds. When punching out,
and a material pushing pin that engages with the holding member and moves the holding member in a direction approaching the reference plate, thereby moving the material present between the two towards the reference plate. Features.

〔Example〕

1 to 3 show one embodiment of the present invention, and in these figures, the same elements as those shown in Figs. 4 to 6 are given the same reference numerals.
Descriptions of parts having the same configuration as those in the figure will be omitted.

A reference plate 20 for abutting the material 9 is fixed to the left side of the upper surface 8 of the lower mold 2 (the upper surface of the plate 2a) as shown in FIG. This reference plate 20
As shown in FIG. 1, a rectangular hole 21 is formed in the upper surface 8 spaced apart in a direction orthogonal to the longitudinal direction of the upper surface 8, and extends downward from the upper surface 8 to the upper surface of the plate 2c. Inside this hole 21,
A substantially square column-shaped presser member 22 is inserted. This presser member 22 has a V-shaped notch in its upper end surface. Further, the lower end portion has a V-shaped cross section, and the top portion thereof is in contact with the upper surface of the plate 2c. The upper end of the presser member 22 protrudes from the upper surface 8 of the lower mold 2, and this protruding portion supports the reference plate 20 with the portion of the presser member 22 in contact with the upper surface of the plate 2c as a fulcrum. By tilting to the side, it is movable in a direction approaching the reference plate 20.

Further, in the plate 1e of the upper mold 1 above the pressing member 22, a material pushing pin 25 having a substantially square column shape that engages with the pressing member 22 is inserted into a hole 26 formed in the plate 1e. Material push pin 2
The upper end surface of the support shaft 27 is fixed in a state in which the upper end surface thereof is in contact with the lower end surface of the support shaft 27. The lower end of the material push pin 25 has a V-shaped cross section, and this V-shaped portion protrudes from the lower surface 3 of the upper mold 1.

The pressing member 22 and the material push pin 25 are:
The material push pin 25 is provided on the lower die 2 and the upper die 1 so that the axis X of the material push pin 25 is located closer to the reference plate 20 than the axis Y of the pressing member 22 .

Further, a notch 30 is formed on the lower surface 3 of the upper mold 1 above the reference plate 20. This notch 30 is used for the reference plate 2 of the lower mold 2 during stamping.
0 to prevent the reference plate 20 from coming into contact with the lower surface 3 of the upper mold 1.

The configuration described above is the material biasing mechanism in the press device.

When processing the material 9 with the press device equipped with the above-described material shifting mechanism, the upper surface 8 of the lower mold 2
When the strip-shaped material 9 is guided on both sides by the guide plate 10 and fed in, the upper mold 1 descends as the upper unevenness (not shown) descends. Then,
The left side of the V-shaped surface of the material push pin 25 protruding from the lower surface 3 of the upper mold 1 is the upper surface 8 of the lower mold 2.
Abuts against the left side surface of the V-shaped surface of the presser member 22. Furthermore, when the upper mold 1 descends, the axis X of the material push pin 25 is located closer to the reference plate 20 than the axis Y of the holding member 22, so the material push pin 25
The presser member 22 is engaged with the presser member 22.
is pushed toward the reference plate 20 by the material push pin 25. Then, the material 9 is pushed toward the reference plate 20 by the holding member 22 and comes into contact with the reference plate 20. Then, when the upper mold 1 further descends, the pilot pins 6 of the upper mold 1 are inserted into the pilot holes 12 of the material 9.
It passes through and fits into the holes 11 of the lower mold 2. This allows the material 9 to be accurately positioned, and then the material 9 is punched out with the medium punch 4 in the same manner as described in FIGS. 4 to 6. The above positioning operation is repeated for each stamping.

As described above, according to the material biasing mechanism in the press device, even if the material 9 meanders when feeding the material 9, the material 9 is transferred to the reference plate 2 for each stamping.
0 so that the material 9 is positioned at a certain position, the pilot pin 6 of the upper mold 1...
accurately passes through the pilot hole 12 of the material 9,
By fitting into the holes 11 of the lower mold 2, the pilot pins 6 do not damage the pilot holes 12 or the material surface near the pilot holes 12.
The material 9 can be positioned accurately.

[Effect of idea]

According to this invention, among the upper and lower molds that approach and separate from each other, a reference plate provided on the upper surface of the lower mold, on one side of the material conveyance path, and a reference plate provided on the upper surface of the lower mold, , a holding member provided on the other side of the material conveyance path and movable in the direction of approaching and separating from the reference plate; and a holding member provided on the lower surface of the upper mold and pressed by the upper and lower molds. When punching out the material, by engaging with the presser member and moving the presser member in a direction approaching the reference plate,
A material push pin that moves the material existing between the two toward the reference plate is provided, and each time the material is punched out, the material push pin engages with the presser member and moves the presser member in a direction approaching the reference plate. By pressing the material against the reference plate, even if the material meandered during feeding, it would remain at a constant position when punching, making it possible to accurately position the material. Effects can be obtained.

[Brief explanation of the drawing]

1 to 3 are diagrams showing one embodiment of this invention, in which FIG. 1 is a side sectional view showing a material biasing mechanism in a press machine, and FIG. 2 is a part of an upper mold. FIG. 3 is a partially omitted plan view of the lower mold, FIGS. 4 to 6 are diagrams showing examples of conventional molds, and FIG. 4 is a partially omitted plan view of the lower mold. FIG. 5 is a partially omitted plan view of the upper die, and FIG. 6 is a partially omitted plan view of the lower die. 1... Upper die, 2... Lower die, 20... Reference plate, 22... Holding member, 25... Material push pin.

Claims (1)

[Scope of utility model registration request] Of the upper and lower molds that approach and separate from each other, a reference plate is provided on the upper surface of the lower mold on one side of the material transport path, and a reference plate is provided on the upper surface of the lower mold to determine the material transport path. a presser member provided on the other side and movable in directions approaching and away from the reference plate; and a presser member provided on the lower surface of the upper mold, when punching material with the upper and lower molds; and a material pushing pin that engages with the holding member and moves the holding member in a direction approaching the reference plate, thereby moving the material present between the two towards the reference plate. Features a material shifting mechanism in press equipment.