JPH06114464A - Press die device - Google Patents

Abstract

PURPOSE:To automatically attach and detach a press pressing rod and a press die. CONSTITUTION:The device is provided with a slide block 16 arranged on a press die 12 freely slidable, slide holders 14, 15 supporting the slide block 16, rod holder plates 18, 19 which are supported rotatable with the slide block 16 and engaged with a press pressing rod 10, and an air cylinder device 20 reciprocating the slide block 16. When the air cylinder 20 is moved forward, the slide block 16 advances with respect to the rod 10 in accordance with this driving motion, and the rod holder plates 18, 19 are engaged with the rod 10. Therefore, the rod 10 is connected to the press die 12. On the contrary when the air cylinder device 20 is moved backward, the slide block 16 is separated from the rod 10, and the engagement of the rod holder plate 18, 19 are released. Therefore, the connection between the rod 10 and the press die 12 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press die apparatus, and more particularly, to an apparatus provided with a pressing rod support mechanism for detachably connecting a press die and a press pressing rod, for example, a semiconductor device manufacturing process. In a press die device for punching one product from a multiple lead frame in which a package is molded.

[0002]

2. Description of the Related Art In a semiconductor device manufacturing plant, for example, a press die device described in JP-A-2-25227 is used for punching one product from a multiple lead frame.

That is, this press die apparatus has a lower die as a fixed die and an upper die as a movable die (hereinafter, referred to as a die).
It is sometimes called a press die. ) And. A die is detachably fixed to the lower die, and a work is supplied to and placed on the die.

A press die, which is an upper die, is supported movably up and down along a plurality of guides erected on the lower die. This press die has a press cylinder device (not shown). The press push rod is detachably connected by a push rod support mechanism described later.

A plurality of strong springs having a predetermined elastic force are built in the press die, and these springs urge the stripper guide bar, which is a means for suspending the stripper, downward. The stripper is always urged downward.

Further, a punch is fixed to the press die, and the punch is configured to punch a work by fitting a lower end portion to a die fixed to a lower die.

In such a press die device, the push rod support mechanism for connecting the press push rod to the press die is detachably formed. That is, the press pressing rod and the press die are moved relative to each other in the direction perpendicular to the axis of the press pressing rod, so that the engaging portion formed at the tip of the press pressing rod and the press die are formed. The engaged portion is engaged with and released from the engagement.

[0008]

However, the above-mentioned press die apparatus has the following problems.

In recent years, many kinds of products have been produced in semiconductor device manufacturing factories.
Then, each time the product to be pressed is replaced, it is necessary to replace the mold of the press mold device. However, in the press die device described above,
Since the rod and the die are only connected by moving the press rod and the die in a direction orthogonal to each other, the press rod and the die are automatically connected. Can not be performed. Therefore, the work of replacing the mold is performed by the worker.

In the press die apparatus described above,
Once the press push rod is installed in the press die, the push rod cannot be automatically released from the press die. Therefore, when the movable die (upper die) is fixed to the fixed die (lower die) due to seizure or the like, when the upper die is driven upward by the press cylinder device, the upper die and the lower die are driven. There is a risk of breaking the mold.

Even when the upper mold and the lower mold are fixed,
Since this state cannot be detected, there is a risk that the press die will be hit twice.

A first object of the present invention is to provide a press die device which can automatically attach and detach the press pressing rod to and from the press die.

A second object of the present invention is to provide a press die device capable of reliably detecting that the movable die is fixed to the fixed die and suppressing damage to the die. To provide.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0015]

The typical ones of the inventions disclosed in the present application will be outlined below.

That is, a press pressing rod disposed above the rod insertion region of the pressing die and driven up and down by a press cylinder device, and a pressing rod support mechanism fixed to the pressing die to support the pressing rod. In the press die device, the pressing rod support mechanism is slidably arranged in a rod insertion area of the press die, and a slide block having a rod insertion portion formed at a substantially central portion thereof, and the press die. A slide block support member that is fixed to a mold and slidably supports the slide block; and a pair of rod pressing members that are disposed in the rod insertion portion of the slide block so as to face each other and are supported by the slide block; It is fixed to the slide block and is arranged above each rod pressing member to separate from the mold of each rod pressing member. A movement restricting member for restricting movement in the direction, and a drive unit fixed to the press die for reciprocatingly driving the slide block. An engaging portion is formed on the outer peripheral surface of the rod so as to be engageable with the engaging portion, and each rod pressing member is supported by the slide block so that the engaging portion is rotatable in a direction away from the press die. The movement restriction member is configured to release the movement restriction when a load equal to or more than a set value is applied.

[0017]

In the above-mentioned means, in the state where the slide block is retracted to the end portion of the rod insertion region of the press die by the backward drive of the drive section, the press cylinder rod is lowered to the press die side by the downward drive of the press cylinder device. Is
It is arranged in the rod insertion area of the press die.

Thereafter, the slide block is moved to the press pressing rod side by the forward drive of the drive unit. Then, by the forward drive of the slide block, the engagement portion of each rod pressing member is engaged with the engagement portion on the outer peripheral side of the press pressing rod. As a result, the press pressing rod is connected to the press die via both engaging portions.

When the press cylinder device is driven down in this state, both the press pressing rod and the press die are driven down.

On the other hand, when the slide block is retracted by the backward drive of the drive portion after the press pressing rod is connected to the press die, the engaging portion is disengaged from the engaging portion on the outer peripheral side of the press rod, and the press pressure is applied. The connection between the rod and the press die is released. Therefore, in this state, when the press pressing rod is driven to move upward by the press cylinder device, the press pressing rod is lifted apart from the press die.

By the way, in a state where the press pressing rod and the press die are connected, seizure or the like occurs when the press cylinder device is driven, and when the press die is fixed to another die, the press die is pressed. When the cylinder device is driven to rise, the press die does not separate from the other die, and thus a large load is applied to the movement restricting member.

At this time, when a load equal to or more than a set value is applied to the movement restricting member, the movement restricting is released, so that each rod pressing member is rotated in a direction away from the press die. By this rotation, the engagement between the rod pressing member and the press pressing rod is released, so that only the press pressing rod is raised while the press pressing rod is separated from the press die.

When each rod pressing member is rotated upward, the optical transmission path of the photoelectric sensor is blocked by each rod pressing member, so that the press drive stop signal is output from the photoelectric sensor. Then, since the ascending drive of the press cylinder device is stopped by this press drive stop signal, it is possible to prevent double pressing of the press die and to suppress damage to the press die to the minimum.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing a main part of a press die apparatus according to an embodiment of the present invention, FIG. 2 is a partially omitted plan view thereof, and FIGS. 3 (a), 3 (b) and 3 (c) are shown. Is the line aa, b in FIG.
Each of the front cross-sectional views taken along line -b and line cc is shown in FIG.

In the present embodiment, the press die apparatus according to the present invention is configured so that one product is punched out from a multiple lead frame (hereinafter sometimes referred to as a work) in a semiconductor device manufacturing factory. Has been done.

That is, the press die device 1 is provided with a lower die 2 as a fixed die and an upper die (hereinafter sometimes referred to as a press die) 12 as a movable die. There is. A die 9 is detachably fixed to the lower die 2, and a multiple lead frame 3 as a work is supplied and placed on the die 9.

The press die 12 is supported so as to be vertically movable along a plurality of guides 4 provided upright on the lower die 2,
The press die 12 includes a press rod 11 of a press cylinder device (not shown), which will be described later.
It is designed to be detachably connected by 0.

A plurality of strong springs 5 having a predetermined elastic force are built in the press die 12, and the springs 5 are provided below the stripper guide bar 6 which is a means for suspending the stripper 7. The stripper 7 is always urged downward by urging the stripper 7 downward.

Further, the punch 8 is fixed to the press die 12, and the punch 8 is constructed so that the work 3 is punched out by fitting the lower end portion to the die 9 fixed to the lower die 2. There is.

The press die apparatus 1 according to this embodiment is provided with a press rod support mechanism 10 for detachably connecting the press push rod 11 to the press die 12, and the press push rod 11 is a press die. It is arranged above the rod insertion region 12 and driven up and down by a press cylinder device.

Pressing rod support mechanism 10 according to the present embodiment
Is a mounting base 13, a pair of slide retainers 14, 1
5, slide block 16, movement restricting member 17, a pair of rod pressing plates 18, 19 and air cylinder device 20
And so on.

The mounting base 13 is formed in a flat plate shape, and both end portions (hereinafter, left end portion and right end portion) are fixed to the surface of the press die 12 by a plurality of bolts 23. . A pair of left and right slide retainers 14 and 15 are arranged facing each other at both left and right ends on the upper surface of the mounting base 13, respectively.
4 and 15 are mounting bases 13 with a plurality of bolts 24.
It is fixed to each.

The left and right slide retainers 14 and 15 are each formed to have an L-shaped cross section. The left and right guide rails 14 are provided inside the slide retainers 14 and 15.
a and 15a are laid so as to extend in the front-rear direction. Slide portions 16a and 16b formed at the left and right end portions of the slide block 16 are slidably inserted into the left and right guide rails 14a and 15a, respectively.

The slide block 16 has a frame shape with a part (hereinafter, referred to as a front part) cut out, and the rod insertion portion 1 is formed by a rectangular space formed inside.
6c is configured. Further, a cylinder rod connecting portion 16d is recessed in a long groove shape in the rear wall portion of the slide block 16, and a cylinder rod 21 of the air cylinder device 20 is inserted from above and connected to the connecting portion 16d. .

The air cylinder device 20 is supported by a bracket 22 formed in a substantially L shape, and the bracket 2
The bottom surface side of 2 is fixed to the mounting base 13 by a bolt. The slide block 16 is driven forward and backward by the reciprocating drive of the air cylinder device 20.

In the rod insertion portion 16c of the slide block 16, left and right rod pressing plates 18 and 19 as rod pressing members are arranged laterally and inserted, respectively, and each rod pressing plate 18 and 19 respectively. The left end portion and the right end portion are rotatably supported by respective support pins 25 mounted on the left and right sides of the front wall portion 16e of the slide block 16.

Then, the left and right rod holding plates 18, 19
At the free end on the opposite surface side of the engaging portion 1, the engaging portion 1 is engageable with the engaging portion 11a formed at the tip of the press pressing rod 11.
Each of 8a and 19a is formed in a circular arc shape facing each other. The engaging portion 11a of the press pressing rod 11 is formed by a flange in which the tip of the rod 11 is cut into a cylindrical shape having a small diameter, and allows both rod pressing plates 18 and 19 to rotate upward. Has become.

The movement restricting member 17 that restricts the rotation of the left and right rod pressing plates 18 and 19 and releases the rotation restriction when a load equal to or more than a set value is applied is a round bar 17 as an axial member.
a and a shear pin 17b, the left and right rod pressing plates 1 are provided between the left and right walls of the slide block 16.
8 and 19 are arranged so as to come into contact with each other from directly above and installed. That is, a round bar 17a as a shaft member is bridged in the left-right direction just above the left and right rod pressing plates 18 and 19, and the shear pin 1 is located on the center line of the round bar 17a.
7b is inserted. Both ends of the shear pin 17b are provided on the left and right side wall portions 16f of the slide block 16,
16 g are respectively inserted and supported.

The lower portion of the outer peripheral surface of the round bar 17a is arranged so as to be able to contact the left and right rod pressing plates 18 and 19. The shear pins 17b are the left and right rod holding plates 1
It is designed such that when the round bar 17a is loaded with a load equal to or more than a set value as the Nos. 8 and 19 rotate, the round bar 17a is broken.

Further, in order to monitor the state in which the left and right rod pressing plates 18, 19 are rotated, the slide block 16
A photoelectric sensor 26 is arranged in the. The photoelectric sensor 26 includes a light emitting portion 26a and a light receiving portion 26b.
a is the left side wall 16f, and the light receiving portion 26b is the right side wall 1
6g each is arranged.

The light emitting section 26a and the light receiving section 26b are the same as the light emitting section 2
The optical transmission line 26c connecting the 6a and the light receiving portion 26b is formed by the round bar 17
The rod holding plates 18 and 19 on the left and right of the round bar are parallel to a.
Are formed so as to be formed above the. And
When the shear pin 17b is broken, the round bar 17a moves upward and the left and right rod pressing plates 18 and 19 rotate upward, so that when the optical transmission path 26c is shut off, the photoelectric sensor 26 sends a press drive stop signal. Is output, and the drive of the press cylinder device is stopped.

Next, the press die apparatus 10 having the above structure
The connecting work between the press pressing rod 11 and the press die 12 in 1 will be described.

In a state where the press pressing rod 11 is arranged above the press die 12 by the upward drive of the press cylinder device, the slide block 16 is driven by the backward movement of the air cylinder device 20 so that the slide block 16 is in the rod insertion region of the press die 12. Moved to the edge side.

In this state, the press cylinder device is driven downward, and the press pressing rod 11 is lowered to the upper surface of the mounting base 13.

After that, the air cylinder device 20 is driven forward, and the slide block 16 is moved forward to the press pressing rod 11 side. As the slide block 16 moves forward,
The left and right rod pressing plates 18 and 19 are press pressing rods 1.
When moved to the 1 side, the left and right engaging portions 18a, 19a engage with the engaging portion 11a of the rod 11, so that the left and right rod pressing plates 18, 19 are connected to the rod 11. As a result, the rod 11 and the press die 12 are connected to each other.

Next, the operation of releasing the connection between the press pressing rod 11 and the press die 12 connected as described above will be described.

After the press process (described later) by the press die 12 is completed, when the air cylinder device 20 is driven backward while the drive of the press cylinder device is stopped, the slide block 16 moves backward. Then, the left and right rod pressing plates 18, 19 are separated from the press pressing rod 11, so that the connection between the rod 11 and the press die 12 is released.

After that, when the press cylinder device is driven upward, the press pressing rod 11 is lifted away from the press die 12.

Here, the press die apparatus 1 according to the above configuration
The press processing work by 0 will be briefly described.

When the press cylinder device is driven and the press pressing rod 11 is lowered while the press pressing rod 11 and the pressing die 12 are connected to each other, the pressing die 12, the punch 8 and the stripper 7 are integrated. Descend to.

Then, the stripper 7 contacts the work 3 to press and fix the work 3 onto the die 9. Then, the press die 12 and the punch 8 are further lowered. At this time,
Although the lowering of the stripper 7 is regulated by the die 9, the stripper guide 6 compressively deforms the spring 5, so that the press die 12 and the punch 8 can further descend.

The work 3 is punched out by the lowering of the punch 8, and the scrap falls from the scrap hole of the die 9.

When the punching of the work 3 is completed, the operation of the press cylinder device is switched and the press pressing rod 11 is raised. When the press pressing rod 11 is lifted, the press die 12 is pushed through the rod pressing plates 18 and 19 in which the engaging portions 18a and 18b are engaged with the engaging portion 11a.
Are lifted by the press pressing rod 11.

As the press die 12 rises, the punch 8 first rises and the punch 8 begins to come out of the work 3. At this time, since the stripper 7 is biased downward by the spring 5, the punch 8 is separated from the work 3. When the punch 8 is removed from the work 3, the press die 12, the punch 8 and the stripper 7 are integrally lifted.

With the above operation, the punching press work on the work 3 is completed. By the way, when the press die 12 is lifted by the press pressure rod 11,
The load of the press die 12 or the like is applied to the shear pin 17b of the movement restricting member 17 via the left and right rod pressing members 18 and 19, but the load at this time is only the own weight of the press die 12 or the like. The shear pin 17b does not break. The shear pin 17b has its strength set so as not to break due to its own weight.

Next, in a state where the press pressing rod 11 is connected to the press die 12, seizure or the like occurs when the press process is executed by driving the press cylinder device, and the press on the movable side is generated. The operation when the die 12 is fixed to the fixed lower die 2 will be described.

When the press die 12 is fixed to the lower die 2 and the press die 12 is lifted by the press pressing rod by the upward drive of the press cylinder device, the press die 12 does not separate from the lower die 2. As the press cylinder device is driven upward, the lifting force of the press pressing rod 11 acts on the left and right rod pressing plates 18 and 19.

The lifting force of the press pressing rod 11 acts on the round bar 17a of the movement restricting member 17 via the left and right rod pressing plates 18 and 19, and when the load exceeds a set value, the shear pin 17b breaks. Sharpin 17b
When is broken, the round bar 17a will escape upward.

The left and right rod pressing plates 18 and 19 that have lost the pressing force of the movement restricting member 17 are respectively attached to the support pins 2.
Rotate upward with 5 and 25 as fulcrums. When the left and right holding plates 18, 19 are respectively rotated upward, they are pushed open, so that the central engaging portions 18a, 19a of the left and right holding plates 18, 19 are engaged with the engaging portion 11a of the press pressing rod 11. The state where the engagement with is released. Therefore, only the press pressing rod 11 moves upward.

Further, at this time, since the optical transmission path 26c of the photoelectric sensor 26 is cut off by the push-opening operation of the left and right rod pressing plates 18, 19, the photoelectric sensor 26 outputs a press drive stop signal. Then, the ascending drive of the press cylinder device is stopped by this press drive stop signal.

As described above, when the press die 12 is fixed to the lower die, it is possible to prevent the press die 12 from being hit twice, and the damage of the press die 12 is minimized. Can be suppressed.

According to the above embodiment, the following effects can be obtained. By disposing a pair of rod pressing members on a slide block which is reciprocally driven by an air cylinder device as a driving unit and configured to engage with the press pressing rod, attachment / detachment of the press pressing rod and the press die can be performed by air. Since it can be automatically performed by moving the slide block back and forth by the cylinder device, the setup time at the time of exchanging the press die can be shortened.

The slide block is provided with a movement restricting member that breaks when a load greater than a set value is applied to the rod pressing member, and the press drive is stopped when the optical transmission path is blocked by the movement of the rod pressing member. Since the photoelectric sensor that outputs a signal is arranged, even if the press die is fixed to the lower die, it is possible to minimize the damage of the press die due to the ascending drive of the press cylinder device, and the press die can be pressed twice. It is possible to prevent hitting.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, the movement restricting member for restricting the movement of the rod pressing member is composed of a shaft-shaped member that abuts on the rod pressing member, and a support member that supports this shaft-shaped member and is broken by a load equal to or more than a set value. However, the notch may be formed in the shaft-like member so that the shaft-like member is broken by a load equal to or more than a set value. In short, the movement restricting member may be configured to automatically release the movement restriction for the rod retainer when a load equal to or more than the set value is applied.

The means for detecting the upward movement of the rod pressing member is not limited to the use of the photoelectric sensor,
An open / close switch that is turned off by breaking the movement restricting member or rotating the rod pressing member may be used.

In the above description, the case where the invention made by the present inventor is mainly applied to the punching press technique for multiple lead frames in the manufacturing process of the semiconductor device which is the field of application of the background has been described. However, the present invention can be applied to punching processes in other manufacturing fields, other plastic working processes, and general press die devices used for transfer molding devices and the like.

[0068]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.

By disposing a slide block which is reciprocally driven by a drive unit in the press die, and by constructing a rod pressing member on the slide block so as to engage with the press pushing rod, the press pushing rod and the press die are arranged. Since the attachment / detachment to / from the mold can be automatically performed by the forward / backward movement of the slide block by the drive unit, the setup time at the time of exchanging the mold can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a press die device according to an embodiment of the present invention.

FIG. 2 is a partially omitted plan view thereof.

3 is a front sectional view taken along lines aa, bb, and cc of FIG. 2, respectively.

FIG. 4 is a partially cut front view showing the whole.

[Explanation of symbols]

1 ... Press mold device, 2 ... Lower mold (fixed mold), 3 ... Work (multiple lead frame), 4 ... Guide, 5 ... Spring, 6 ... Stripper, 7 ... Stripper, 8 ... Punch,
9 ... Die, 10 ... Push rod support mechanism, 11 ... Press push rod, 12 ... Press die (upper die), 13 ... Mounting base, 14, 15 ... Slide holder, 16 ... Slide block, 17 ... Movement restricting member, 17a ... Round bar, 17b ... Shear pin, 18, 19 ... Rod pressing plate, 20 ... Air cylinder device (driving device), 21 ... Cylinder rod, 22
... brackets, 23, 24 ... bolts, 25 ... support pins,
26 ... Photoelectric sensor.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B21D 53/00 D 7047-4E B30B 15/28 L 8015-4E E 8015-4E (72) Inventor Noboru Senba At 393 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture

Claims (4)

[Claims] 1. A press pressing rod, which is arranged above a rod insertion region of a press mold and is driven up and down by a press cylinder device, and a pressing rod support mechanism which is fixed to the press mold and supports the press pressing rod. In the press die apparatus, the pressing rod support mechanism is slidably arranged in a rod insertion region of the press die, and has a slide block in which a rod insertion portion is formed at a substantially central portion, and the press die. A slide block support member that is fixed to a mold and slidably supports the slide block; and a pair of rod pressing members that are disposed in the rod insertion portion of the slide block so as to face each other and are supported by the slide block; A drive unit that is fixed to the press die and that reciprocally drives the slide block. The engagement portion formed on an outer peripheral surface and engageable engagement portion of the press push rod is formed on the facing surfaces side press die apparatus according to claim. 2. A press pressing rod, which is arranged above the rod insertion region of the press mold and is driven up and down by a press cylinder device, and a pressing rod support mechanism which is fixed to the press mold and supports the press pressing rod. In the press die apparatus, the pressing rod support mechanism is slidably arranged in a rod insertion region of the press die, and has a slide block in which a rod insertion portion is formed at a substantially central portion, and the press die. A slide block support member that is fixed to a mold and slidably supports the slide block; and a pair of rod pressing members that are disposed in the rod insertion portion of the slide block so as to face each other and are supported by the slide block; It is fixed to the slide block and arranged above the rod holding members so that the rod holding members move away from the mold. A movement restricting member that restricts movement and a driving unit that is fixed to the press die and that reciprocally drives the slide block are provided, and an outer periphery of the press pressing rod is provided on each facing surface side of each rod pressing member. An engaging portion that is engageable with the engaging portion formed on the surface is formed, and each rod pressing member is supported by the slide block so that each engaging portion is rotatable in a direction away from the press die. The press die device, wherein the movement restriction member is configured to release the movement restriction when a load of a set value or more is applied. 3. The movement restricting member includes a shaft-shaped member arranged so as to be capable of contacting each of the rod pressing members, and a support member fixed to the slide block to support both ends of the shaft-shaped member. The press die apparatus according to claim 2, wherein the support member is configured to be broken when a load equal to or greater than a set value is applied to the shaft-shaped member. 4. A press drive stop signal is output when a light emitting portion and a light receiving portion are disposed above at least one rod pressing member so as to face each other and an optical transmission line connecting the light emitting portion and the light receiving portion is cut off. 3. The press die apparatus according to claim 2, wherein a photoelectric sensor that operates is provided.