JPS6284837A - Cutting and forming device - Google Patents

Abstract

PURPOSE:To eliminate the need for executing a complicated motion of a chuck, and to easily grasp a work by forming the work, and moving a lower die to a position where an obstacle scarcely exists on a base, in a state that the work has been placed, when an upper die ascends. CONSTITUTION:When punching and bending are completed, an upper die 41 ascends, also a shooter 31 also ascends by a spring, and a work is left in an aligned state on a lower die body of a lower die 21. Subsequently, a lever driving member 51 is moved to the right, the inner surface of a guide groove pushes and moves a pin 65, a lever 61 is turned clockwise centering around a pin 64, and the lower die 21 is moved to the front of a top plate 11. The work on the lower die 21 which has been moved to the front on the top plate 11 is sucked by a vacuum chuck, etc., moving onto the lower die 21 from a suitable direction and carried to the next process. A lead frame which has been left on the shooter 31 is drawn onto the shooter 31 from the side, caught by a rod which has provided a claw on the tip and discharged to the side. The lower die 21 is moved in the rear again and prepared for the next working.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a cutting and forming device for punching out a work such as an IC molded on a lead frame from the lead frame and bending the leads.

(B) Conventional technology Conventionally, a device for punching out an IC, etc. (hereinafter referred to as a work) molded on a lead frame from the lead frame and bending and forming the leads has a lower mold fixed on a base; An upper mold that moves up and down and faces the lower mold is provided above the lower mold, a lead frame is sandwiched between the lower mold and the upper mold, and the workpiece is punched from the lead frame, and the lead of the workpiece is folded and bent. The device is known.

(c) Problems to be solved by the invention However, in the above device, the punched workpiece is positioned on the lower mold and placed in an aligned state, which has the advantage of facilitating work in the next process. On the other hand, in order to grip and take out these workpieces with a chuck, the chuck must be inserted between the upper die and the lower die, and at that time, the guide boss etc. that guide the upper die becomes an obstacle, causing the chuck to It had the disadvantage of requiring complex movements.

Therefore, it was considered to extrude the workpieces aligned on the lower die to the side, but in the next process, it is necessary to align the direction of the workpieces again, and especially when the workpieces are QUAD type ICs. had the disadvantage that the lead was deformed when it was slid over the lower mold for extrusion.

In addition, the space between the upper mold and the lower mold is narrow, making it difficult to inspect and repair the upper mold and the lower mold.

This invention was made in view of the above-mentioned disadvantages, and it is easy to grip the workpiece with a chuck, the lead of the workpiece is not deformed, and the cutting and repair work of the upper and lower molds is easy. The purpose is to provide a forming device.

(d) Means for Solving the Problems As a means for solving the above-mentioned disadvantages, the cutting and forming apparatus of the present invention includes a base, a lower die movably mounted on the base, and a lower die movably disposed on the base. a drive means for moving the lower mold, and a lead frame sandwiched between the lower mold and the lower mold;
An upper die that is movable up and down on a base for punching and forming a workpiece; an upper die driving means that drives the upper die up and down; and an upper die that is interposed between the upper die and the lower die, It consists of a shake that supports the frame.

(E) Function The function of the cutting and forming device of the present invention will be explained below. First, the lead frame is loaded into the chute with the upper die raised.

Next, the upper die is lowered and the lead frame is sandwiched between the upper die and the lower die, and the workpiece is punched out from the lead frame and the leads of the workpiece are bent and shaped.

When the upper die rises again, the lower die leaves the workpiece and moves to a position on the base where there are fewer obstacles.

Therefore, the chuck does not need to make complicated movements to avoid obstacles, can easily grip the workpiece, does not need to slide the workpiece on the lower mold, and does not deform the lead of the workpiece.

(F) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

First, to explain the outline of the entire device, FIG. 1 is a front view of the device according to this embodiment, and FIG.
It is a sectional view taken along the line -■. Reference numeral 10 denotes a nearly housing-like base, and this base 10 has a side plate 13a on the periphery of the bottom plate 14.
, 13b are erected, the sub-top plate 12 is placed on top of these side plates 13a and 13b, and the top plate 11 is further placed and fixed thereon. Note that the base 1O may be of any type as long as it can firmly support the top plate 11 (but is not limited to that of this embodiment).

The top plate 11 and the sub-top plate 12 are provided with rectangular communication portions 11a and 12a, respectively, which communicate with each other. Further, a guide portion 15.15 for guiding the lower mold 21 that is slidably placed on the top plate 11 is provided on the side edge of the communication portion 11a in the longitudinal direction.

Three guide posts 4 are provided in the processed portion 20 on the upper surface of the top plate 11.
7.47.47 is erected, and an upper mold base 44 having an upper mold 41 fixed to its lower surface is attached to a guide post 47 so as to be vertically slidable.

A shake 31 supporting a lead frame 81 is provided below the upper die base 44 so as to be movable up and down.

On the other hand, inside the base 10, as a drive means 50 for sliding the lower mold 2I, a lever 61 whose upper end is connected to the side surface of the lower mold 21 and whose lower end is pivotally supported on the bottom plate 14,
A lever drive member 51 that drives the central portion of the lever 61 back and forth, a rodless pneumatic cylinder 55 that drives the lever drive member 51, and the like are provided.

Further, above the base 10, there are pillars 74 at the four corners...
..., 74 is provided, a hydraulic cylinder 71 is placed and fixed on this flat plate 73 as a means for driving the upper die base 44 up and down, and the rod 72 is attached to the flat plate 73. An insertion hole (not shown) is inserted into 73 and connected to the upper surface of the upper mold base 44.

Below, important parts of each component will be explained in detail.

First, with reference to FIGS. 3 and 4, the processing section 20
To explain this, the front side (the third
In the figure, one guide post 47 is provided on the top plate 11, and two guide posts 47 are provided on the back side of the communication portion 11a. The reason why there are three guide posts 47 instead of four is to make it easier to load the lead frame 81 onto the shake 31 using a chuck (not shown).

On the other hand, the flat upper mold base 44 has insertion holes 45 in three of its corners through which the guide posts 47, 47, 47 are inserted through the ball bushes 46, . . . , 46, respectively. ,...,45 are provided. still,
44a1..., 44a are sleeves for ensuring support of the upper mold base 44.

Guide boss 47. 47. Spring 4B on the outer periphery of 47,...
. . , 48 are wound around the ball bushes 46, . . . , 48 to prevent the ball bushes 46, . springs 48, ..., 48 are omitted).

The upper mold 41 is positioned and fixed to the lower surface of the upper mold base 44. At the center of the lower surface of the upper mold 41, an upper mold main body 42 is vertically installed, and on both sides thereof there are probes 43 for inspecting whether the position of the lead frame 81 loaded on the shake 31 is accurate or not.・, 43 are installed vertically.

A shake 31 is provided below the upper die 41.

The shake 31 has a pair of restraining members 34 which are opened and closed by a driving means (not shown) on a substrate 32 having a through groove 33 in the center thereof, in order to insert the upper mold body 42 or the lower mold body 22 described below. .34 is slidably provided. At the four corners of the bottom surface of the board 32, there are rods 35,...
..., 35 are installed vertically. The lower end of each rod 35 has a rod holder portion 18.1 protruding from the top plate 11.
8 are inserted into through holes 18a, . . . , 18a via bushes 18b1, . Note that these through holes 18a,...
..., 18a is an insertion hole 11b bored in the top plate 11
, ..., Ilb and the insertion hole 12b bored in the sub-top plate 12, ......, communicating with the rod 3
5, ..., 35 ensure the downward axis movement. A spring 37 is wound around each rod 35, 35 to urge the shake 31 upward and hold it on the lower mold 21 (in FIG. 3, these springs 37, . . . 3
7 is omitted). Note that the notches 36, .

An example of the lead frame 81 loaded into the shake 31 is shown in FIG. This lead frame 81 has a work piece 82 which is a QUAD type IC on a thin metal plate.
. . , 82 are arranged in a row, and each work 82 is integrally connected to the lead frame 81 by leads 83, . . . , 83. The probes 43 , . . . , 43 hanging down from the upper mold 41 are inserted into the small holes 84 , . This is to check whether the shake 31 is loaded in the correct position.

On the top plate 11 is a lower mold 21 that can slide on the top plate 11.
It is placed so that the communication portion 11a is passed to the side. A pair of protrusions 23.23 are provided on the lower end side of the lower mold 21, and these protrusions 23.23 fit into the notches a16.16 of the lower mold guide part 15 (see also FIG. 2). ), guided. At the center of the upper surface of the lower mold 21, the upper mold main body 4
A lower mold body 22 that fits with the mold body 2 is provided.

Finally, the lower die driving means 50 will be explained with reference to FIGS. 1 and 2 again. A pair of angle members 56 and 56 are fixed to the side plate 13b of the base 10 so as to face each other, and these angle members Between the tips of the members 56.56, two rodless cylinders 55.55 are arranged horizontally, one above the other. A lever drive member 51 made of a ferromagnetic material is provided on these rodless cylinders 55.55, through which the rodless cylinders 55.55 are inserted, and which can be moved left and right. This lever drive member 51 is driven left and right in conjunction with the movement of a piston (not shown) made of a magnet within a rodless cylinder 55.55.

A guide groove 62 having a length in the longitudinal direction of the lever 61 is provided at the lower end of the lever 61, and is pivoted to an angle member 63, 63 provided on the bottom plate 14 with a pin 64.

A pin 65 is protruded from the middle of the lever 61 and is inserted into a longitudinal guide groove 52 recessed in the front surface of the lever driving member 51 . A connecting member 66 is rotatably attached to the upper end of the lever 61, and the upper end of the connecting member 66 is connected to the lower mold 2.
It is fixed to the side of 1 with bolts etc.

Next, the operation of the cut ink and forming device according to this embodiment will be explained below. First, the lever driving member 51 is moved rearward (to the left in the paper of FIG. 1), and the lever 6
1 rotates about the bin 64 in the direction of the half-hour hand, and the lower mold 21 is positioned directly below the upper mold 41 (at this time, the lower mold 21 is positioned by a stopper, not shown).

Then, the lead frame 81 is grabbed by the chuck from the side and the substrate 3 is held between the holding members 34 and 34 of the shooter 31.
Loaded on 2. When the loading operation is completed, the chuck moves back to the side and grabs the next lead frame 81, while the holding members 34, 34 of the shooter 31 close and fix the lead frame 81 on the substrate 32.

Next, the hydraulic cylinder 71 lowers the upper die 41.
At this time, the probe 43 first reaches the lead frame 81 on the shake 31 and inspects whether the lead frame 81 is set in the correct position.If the lead frame 81 is not set in the correct position, an alarm sounds and the Appropriate measures are taken, such as stopping the descent of the mold 41. If the lead frame 81 is set correctly, the upper mold 41 continues to descend, and the upper mold body 42 contacts the upper surface of the lead frame 81, pushing the lead frame 81 together with the shooter 31 onto the upper surface of the lower mold main body 22. Then, the lead frame 81 is sandwiched between the upper die main body 42 and the lower die main body 22, and the workpiece 82,...
At the same time as punching out workpiece 82, workpiece 82,...,8
2 leads 83, . . . , 83 are bent and formed. FIG. 5 shows the situation immediately after this.

When punching and bending are completed, the upper mold 41 rises, and the shooter 31 also rises due to the urging force of the springs 37, . . . , 37, and the lower mold body 22 of the lower mold 21 is The works 82, . . . , 82 are left in an aligned state.

Next, the lever driving member 51 is moved to the right, the inner surface of the guide groove 52 pushes the pin 65, and the lever 61
4 in the clockwise direction, and the lower die 21 is moved to the front of the top plate 11 (see the two-dot chain line in Fig. 1 and Fig. 3).
The reason why the guide groove 52 of the lever driving member 51 is vertically long and the guide groove 62 at the lower end of the lever 61 is long in the longitudinal direction of the lever 61 is that when the lever 51 rotates, its upper end is horizontally at a certain height. This is because the lower end of the lever 61 and the pin 65 move up and down due to the movement.

The workpiece 82 on the lower mold 21 has been moved to the front part on the top plate 11,
. . . 82 is moved onto the lower mold 21 from an appropriate direction, is attracted by a vacuum chuck (not shown), etc., and is transported to the next step.

The lead frame 81 remaining on the shake 31 extends onto the shake 31 from the side. It is caught by a rondo (not shown) with a claw at its tip and discharged to the side. The lower mold 21 moves backward again and prepares for the next processing.

Note that the shapes of the lead frame, upper mold, lower mold, etc. are not limited to those of the above-mentioned embodiments, and can be changed in design as appropriate. In particular, the lower mold drive means is not limited to that of the above-mentioned embodiment, and the design can be changed as appropriate, such as driving the lower mold directly with a pneumatic cylinder or using other power sources such as a motor. (The reason why the lever 61 is used in the above-mentioned embodiment is that if it were directly driven by a cylinder, the stroke of the cylinder would become long and the device would become large).

(G) Effects of the Invention The cutting and forming apparatus of the present invention includes a base, a lower die movably provided on the base, a drive means for moving the lower die, and a lead frame together with the lower die. an upper die movably provided on a base for punching and forming a workpiece, an upper die drive means for driving the upper die up and down, and an upper die driving means interposed between the upper die and the lower die. , and a chute that supports the lead frame, and in order to move the lower die to a part of the base with fewer obstacles and have the workpiece gripped by the chuck, the chuck must make complicated movements to avoid obstacles. This has the advantage that the structure and control of the chuck are simplified, and there is no need to extrude the workpiece from above the lower mold.

Furthermore, since the lower mold is moved, there is an advantage that inspection and repair work for the upper mold and the lower mold is facilitated.

[Brief explanation of drawings]

FIG. 1 is a side view of a cutting and forming device according to an embodiment of the present invention, FIG. 2 is a non-sectional view of the same device taken along line nn in FIG. 1, and FIG. 3 is a side view of the same device. FIG. 4 is an enlarged side view of the main part of the device, FIG. 5 is an enlarged side view of the main part explaining the operation of the device, and FIG. 6 is an enlarged side view of the main part to which the device is applied. It is a figure showing an example of a lead frame. 10: Base, 21: Lower mold, 31: Shake, 41: Upper mold, 50: Lower mold driving means, 71: Hydraulic cylinder, 81: Lead frame. Patent applicant ROHM Co., Ltd. agent
Patent Attorney Shigeru Nakamura Figure 1 Figure 2 Figure 5rl! J

Claims (1)

[Claims] (1) A base, a lower die movably provided on the base, a drive means for moving the lower die, and a base on which a lead frame is sandwiched together with the lower die and a workpiece is punched and formed. A cutting device comprising: an upper die that is movable up and down; an upper die drive means that drives the upper die up and down; and a shooter that is interposed between the upper die and the lower die and supports the lead frame. and forming equipment.