CN219309824U

CN219309824U - Single-side partial pressure stamping forming device for lead frame

Info

Publication number: CN219309824U
Application number: CN202223463955.XU
Authority: CN
Inventors: 孙东续; 吴书楼
Original assignee: Suzhou Xingshengke Semiconductor Material Co ltd
Current assignee: Suzhou Xingshengke Semiconductor Material Co ltd
Priority date: 2022-12-25
Filing date: 2022-12-25
Publication date: 2023-07-07
Anticipated expiration: 2032-12-25

Abstract

The utility model provides a single-side partial pressure stamping forming device of a lead frame, which relates to the technical field of stamping forming and comprises a lower die, a waste tank, a limiting telescopic rod, parallel plates and springs, wherein the waste tank is arranged at the center of the top of the lower die, the limiting telescopic rod is fixedly arranged at the inner bottom of the waste tank, the parallel plates are fixedly arranged at the top of the limiting telescopic rod, the springs are sleeved outside the limiting telescopic rod, and a stamping assembly is arranged on the parallel plates. When the second stripper plate is subjected to unilateral partial pressure, the pressure to the pins below the first stripper plate does not exist, the thickness of the pins is kept unchanged, the first stripper plate has larger pressure to the pins due to the partial pressure at the moment, the pins are fixed and have normal shapes, so that the partial pressure at the positions of the pins of the stripper plate of the lead frame stamping die is changed from bilateral to unilateral, the materials are fixed by the stripper plate in the pin stamping forming process, and the problem of distortion of the shapes of the pins is solved.

Description

Single-side partial pressure stamping forming device for lead frame

Technical Field

The utility model relates to the technical field of stamping forming, in particular to a single-side partial pressure stamping forming device for a lead frame.

Background

The lead frame for semiconductor package mainly comprises two manufacturing processes: the etching and stamping processes are characterized by low cost of the die, but the manufacturing process is complex, so that the unit price is higher, the method is suitable for various small-batch products, and the stamping process is characterized by high cost of the die, but the manufacturing process is simple, so that the unit price is lower, and the method is suitable for mass production with few varieties.

Because the punching process is carried out by punching the material through a die punch, the material is inevitably deformed in the punching process, and in order to solve the problem, the prior solution is to design two-sided partial pressures of 0.01-0.02 mm on two sides of a punch hole of a stripper plate of a punching die, but the solution has an unsatisfactory effect of solving the material deformation or pin torsion, so that a novel lead frame single-sided partial pressure punching forming device is provided.

Disclosure of Invention

The utility model aims to solve the problem that the prior art inevitably causes material deformation in the punching process, and in order to solve the problem, the prior coping scheme is to design two-side partial pressures of 0.01-0.02 mm on two sides of a punch hole of a punch die stripper plate, but the scheme solves the problem that the effect of material deformation or pin torsion is not ideal, and provides a lead frame single-side partial pressure punch forming device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: including the die subassembly, the die subassembly includes bed die, waste tank, spacing telescopic link, parallel plate and spring, the top center department at the bed die is seted up to the waste tank, spacing telescopic link fixed mounting is in the interior bottom of waste tank, parallel plate fixed mounting is at the top of spacing telescopic link, the outside at spacing telescopic link is established to the spring housing, punching press subassembly sets up the top at the die subassembly.

Further, the top of bed die is close to the equal fixedly connected with spliced pole in position of four corners, four fixedly connected with roof between the top of spliced pole, and the spliced pole has played the effect of connecting bed die and roof.

Further, the bottom of roof is close to left side position symmetry fixedly connected with two first guide posts, the bottom of roof is close to intermediate position symmetry fixedly connected with four second guide posts, the bottom of roof is close to right side position symmetry fixedly connected with two third guide posts, and first guide post, second guide post and third guide post have played the spacing effect of drift, first stripper and second stripper direction.

Further, the punching press subassembly includes first pneumatic cylinder, second pneumatic cylinder and third pneumatic cylinder, first pneumatic cylinder fixed mounting is close to intermediate position in the bottom of roof, the bottom fixedly connected with drift of first pneumatic cylinder, four first guide slots have been seted up to the top of drift near the position symmetry of four corners, drive the drift through first pneumatic cylinder and descend, have played the effect to the work piece punching press.

Further, second pneumatic cylinder fixed mounting is close to left position in the bottom of roof, the first stripper of bottom fixedly connected with of second pneumatic cylinder, the second guide way has been seted up to the top symmetry of first stripper, has played the effect to lead frame work piece pin punching press through starting second pneumatic cylinder drive first stripper.

Further, third pneumatic cylinder fixed mounting is in the bottom of roof and is close to the position on right side, the bottom fixedly connected with second stripper of third pneumatic cylinder, the third guide way has been seted up to the top symmetry of second stripper, has driven the effect of the punching press of second stripper to lead frame local material through the third pneumatic cylinder to descend.

Further, the first guide groove corresponds to the second guide post, the second guide groove corresponds to the first guide post, and the third guide groove corresponds to the third guide post, so that the lifting stability of the punch, the first stripper plate and the second stripper plate is improved.

Compared with the prior art, the utility model has the advantages and positive effects that,

1. in the utility model, when the single side of the second stripper plate is locally pressed, the pressing amount of the pin below the first stripper plate does not exist, the thickness of the pin is kept unchanged, the local pressing of the first stripper plate is larger than the pressing amount of the pin at the moment, the pin is fixed and the shape is normal, so that the local pressing of the pin position of the stripper plate of the lead frame stamping die is changed from double sides to single sides, the material is fixed by the stripper plate in the pin stamping forming process, and the problem of distortion of the shape of the pin is solved.

2. In the utility model, when the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder are retracted, the springs in the waste material tank push the parallel plates upwards, so that the waste material is pushed out of the tank, and the problem that the deformed waste material is blocked in the waste material tank and is difficult to take out is avoided.

Drawings

Fig. 1 is a perspective view of a single-side partial press forming device for a lead frame according to the present utility model;

fig. 2 is a cross-sectional perspective view of a single-side partial pressure stamping forming device for a lead frame according to the present utility model;

fig. 3 is a schematic structural diagram of a die assembly of a single-side partial press forming device for a lead frame according to the present utility model;

fig. 4 is a schematic structural diagram of a stamping assembly of a single-side partial-pressure stamping forming device for a lead frame according to the present utility model.

Legend description: 1. a female die assembly; 101. a lower die; 102. a waste tank; 103. a limiting telescopic rod; 104. a parallel plate; 105. a spring; 2. a connecting column; 3. a top plate; 4. a first guide post; 41. a second guide post; 42. a third guide post; 5. a punching assembly; 501. a first hydraulic cylinder; 502. a punch; 503. a first guide groove; 504. a second hydraulic cylinder; 505. a first stripper plate; 506. a second guide groove; 507. a third hydraulic cylinder; 508. a second stripper plate; 509. and a third guide groove.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a unilateral local press stamping forming device of lead frame, including die assembly 1, die assembly 1 includes bed die 101, waste tank 102, spacing telescopic link 103, parallel plate 104 and spring 105, waste tank 102 is seted up in the top center department of bed die 101, spacing telescopic link 103 fixed mounting is in the interior bottom of waste tank 102, parallel plate 104 fixed mounting is at the top of spacing telescopic link 103, spring 105 cover is established in the outside of spacing telescopic link 103, stamping assembly 5 sets up the top at die assembly 1.

As shown in fig. 1 and 2, connecting columns 2 are fixedly connected to positions, close to four corners, of the top of the lower die 101, top plates 3 are fixedly connected between the tops of the four connecting columns 2, and the connecting columns 2 play a role in connecting the lower die 101 with the top plates 3.

As shown in fig. 1 and 2, two first guide posts 4 are symmetrically and fixedly connected to the bottom of the top plate 3 near the left side, four second guide posts 41 are symmetrically and fixedly connected to the bottom of the top plate 3 near the middle side, two third guide posts 42 are symmetrically and fixedly connected to the bottom of the top plate 3 near the right side, and the first guide posts 4, the second guide posts 41 and the third guide posts 42 play a role in guiding and limiting the punch 502, the first stripper 505 and the second stripper 508.

As shown in fig. 1, 2 and 4, the punching assembly 5 includes a first hydraulic cylinder 501, a second hydraulic cylinder 504 and a third hydraulic cylinder 507, the first hydraulic cylinder 501 is fixedly installed at the bottom of the top plate 3 and near to the middle position, the bottom end of the first hydraulic cylinder 501 is fixedly connected with a punch 502, four first guide grooves 503 are symmetrically formed at the top of the punch 502 near to the four corners, and the punch 502 is driven to descend by the first hydraulic cylinder 501 to punch a workpiece.

As shown in fig. 1, 2 and 4, a second hydraulic cylinder 504 is fixedly installed at a position, close to the left side, of the bottom of the top plate 3, a first stripper plate 505 is fixedly connected to the bottom end of the second hydraulic cylinder 504, second guide grooves 506 are symmetrically formed in the top of the first stripper plate 505, and the second hydraulic cylinder 504 is started to drive the first stripper plate 505 to punch pins of a lead frame workpiece.

As shown in fig. 1, 2 and 4, a third hydraulic cylinder 507 is fixedly installed at a position, close to the right side, of the bottom of the top plate 3, a second stripper plate 508 is fixedly connected to the bottom end of the third hydraulic cylinder 507, third guide grooves 509 are symmetrically formed in the top of the second stripper plate 508, and the third hydraulic cylinder 507 drives the second stripper plate 508 to descend so as to punch partial materials of the lead frame.

As shown in fig. 1, 2 and 4, the first guide groove 503 corresponds to the second guide post 41, the second guide groove 506 corresponds to the first guide post 4, and the third guide groove 509 corresponds to the third guide post 42, and serves to increase the lifting stability of the punch 502, the first stripper plate 505 and the second stripper plate 508.

The application method and the working principle of the device are as follows: when the lead frame is stamped, the first hydraulic cylinder 501 is started to drive the punch 502 to stamp the workpiece material, then the third hydraulic cylinder 507 is started to drive the second stripper plate 508 to stamp the workpiece material, finally the first hydraulic cylinder 501 is started to drive the first stripper plate 505 to stamp the workpiece material pins, when the single side of the second stripper plate 508 is partially pressed, the pressing amount of the pins below the first stripper plate 505 does not exist, the thickness of the pins is kept unchanged, the first stripper plate 505 is partially pressed at the moment to have larger pressing amount on the pins, the pins are fixed, and the shape is normal, so that the partial pressing of the pin positions of the stripper plate of the lead frame stamping die is changed from double sides to single sides, the materials are ensured to be fixed by the stripper plate in the pin stamping forming process, the problem of pin shape distortion is solved, and meanwhile, when the first hydraulic cylinder 501, the second hydraulic cylinder 504 and the third hydraulic cylinder 507 are retracted, the spring 105 inside the parallel plate 102 pushes the waste material upwards to push the parallel plate 104, and the waste material is prevented from being clamped in the waste material tank 102 and difficult to be taken out.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. Unilateral local pressure stamping forming device of lead frame, its characterized in that includes:

the die assembly (1), the die assembly (1) comprises a lower die (101), a waste trough (102), a limiting telescopic rod (103), parallel plates (104) and springs (105), wherein the waste trough (102) is arranged at the center of the top of the lower die (101), the limiting telescopic rod (103) is fixedly arranged at the inner bottom of the waste trough (102), the parallel plates (104) are fixedly arranged at the top of the limiting telescopic rod (103), and the springs (105) are sleeved outside the limiting telescopic rod (103);

and the stamping component (5) is arranged above the die component (1).

2. The single-sided partial pressure stamping forming device of a lead frame according to claim 1, wherein: the top of lower mould (101) is close to the position of four corners and all fixedly connected with spliced pole (2), four fixedly connected with roof (3) between the top of spliced pole (2).

3. The lead frame single-side partial pressure stamping forming device according to claim 2, wherein: the bottom of roof (3) is close to left side position symmetry fixedly connected with two first guide post (4), the bottom of roof (3) is close to intermediate position symmetry fixedly connected with four second guide post (41), the bottom of roof (3) is close to right side position symmetry fixedly connected with two third guide post (42).

4. The single-sided partial pressure stamping forming device of a lead frame according to claim 1, wherein: the stamping assembly (5) comprises a first hydraulic cylinder (501), a second hydraulic cylinder (504) and a third hydraulic cylinder (507), wherein the first hydraulic cylinder (501) is fixedly installed at the bottom of the top plate (3) and is close to the middle position, a punch (502) is fixedly connected to the bottom end of the first hydraulic cylinder (501), and four first guide grooves (503) are symmetrically formed in the top of the punch (502) and close to the positions of four corners.

5. The single-sided partial pressure stamping forming device of a lead frame according to claim 4, wherein: the second hydraulic cylinder (504) is fixedly arranged at the position, close to the left side, of the bottom of the top plate (3), the bottom end of the second hydraulic cylinder (504) is fixedly connected with the first stripper plate (505), and second guide grooves (506) are symmetrically formed in the top of the first stripper plate (505).

6. The single-sided partial pressure punch forming device of a lead frame according to claim 5, wherein: the third hydraulic cylinder (507) is fixedly arranged at the position, close to the right side, of the bottom of the top plate (3), the bottom end of the third hydraulic cylinder (507) is fixedly connected with the second stripper plate (508), and third guide grooves (509) are symmetrically formed in the top of the second stripper plate (508).

7. The single-sided partial pressure punch forming device of a lead frame according to claim 6, wherein: the first guide groove (503) corresponds to the second guide post (41), the second guide groove (506) corresponds to the first guide post (4), and the third guide groove (509) corresponds to the third guide post (42).