CN111570615A

CN111570615A - Positioning pin of lead frame stamping die

Info

Publication number: CN111570615A
Application number: CN202010454020.1A
Authority: CN
Inventors: 康亮; 康小明; 马文龙; 孙飞鹏
Original assignee: Tianshui Huayang Electronic Technology Co ltd
Current assignee: Tianshui Huayang Electronic Technology Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-08-25

Abstract

The invention relates to the field of semiconductor packaging tools, in particular to a positioning needle of a lead frame stamping die, which comprises a positioning needle, wherein the positioning needle is positioned in a positioning needle counter bore matched with the contour of the positioning needle at the back of a pressure plate, the positioning needle comprises a needle rod and a needle cap which are integrally connected from bottom to top, the needle rod is connected with the needle cap, an extrusion barrel is arranged outside one end of the needle rod connected with the needle cap, and a plurality of expansion strip holes are uniformly distributed on the periphery of the extrusion barrel; the invention solves the problem that the needle body is shot in the die after falling off from the material pressing plate to cause die breaking and die breaking, ensures the service life of the die and the product quality, and is beneficial to improving the yield and the production efficiency of the lead frame.

Description

Positioning pin of lead frame stamping die

Technical Field

The invention relates to the field of semiconductor packaging tools, in particular to a positioning pin of a lead frame stamping die.

Background

Lead frames are an important basic component in the electronic information industry. The lead frame is used as a chip carrier of the semiconductor integrated circuit, and the electrical connection between the leading-out end of the internal circuit of the chip and the external lead is realized by means of a gold bonding wire, so that a key structural member of an electrical loop is formed, and the lead frame plays a role of a bridge connected with an external lead. The punching method of the lead frame mainly comprises four working procedures of punching, electroplating, forming and sorting. The punching step is a process of punching a strip-shaped raw material into a lead frame by a punching method. Along with the lead frame towards the development of the direction of wider and thinner material, multirow, high foot position, little punching a hole, higher punching speed equidirectional, require stamping die's precision and location precision to develop to higher degree, there is not the boss between original stamping die location needle cap and needle body, the needle cap is greater than the needle body card inside the pressure flitch, the needle body diameter slightly is lighter than stripper via hole and passes the stripper, when the inside mistake of mould is sent or is blocked the material, the locating pin is inclined to one side easily or the dieback rupture, locating pin needle body rupture part can not block and drop to the location faller from the stripper, the mould contact about when next stroke, clap the locating pin garrulously, clap inside the mould, not only influence the mould precision, and cause certain economic loss and quality hidden danger.

Disclosure of Invention

The invention aims to: aiming at the problems, the invention provides a positioning pin of a lead frame stamping die.

The utility model provides a lead frame stamping die pilot pin, includes the pilot pin, the pilot pin is located 6 backs of pressure flitch and in the pilot pin counter bore of pilot pin profile complex, its characterized in that: the pilot pin includes by lower supreme body coupling's needle bar 2 and needle cap 1, needle bar 2 and needle cap 1 are connected, the one end outside that needle bar 2 and needle cap 1 are connected sets up recipient 3, a plurality of inflation strip holes 4 of the periphery evenly distributed of recipient 3.

The lower edge of the back of the material pressing plate 6 is also provided with a positioning pin through hole for penetrating through the needle rod 2.

According to the lead frame stamping die positioning needle, the needle point at the bottom end of the needle rod 2 is exposed out of the front surface of the pressure plate 6 by a certain height.

The positioning needle of the lead frame stamping die is further provided with a fixing sleeve, and a jackscrew 7 is installed in the fixing sleeve; the jackscrew 7 is fixedly connected with the top of the needle cap 1 of the positioning needle through a spring 5.

When the die is closed, the pressure plate 6 is in contact with the female die to press materials, and the tip of the needle rod 2 enters the female die positioning hole and the product positioning hole, thereby playing a role in positioning and guiding. If pay-off is unusual in the mould, when the pilot pin can not fix a position and push up the material area, because needle cap 1, spring 5, jackscrew 7 interact, lead to the needle cap 1 and the recipient 3 of pilot pin to break in needle cap department, recipient 3 receives the extrusion and makes the outside inflation of inflation strip hole 4 simultaneously, and then the 3 cards of inflation recipient are in the location pinhole, make cracked needle bar 2 can not drop from the pilot pin via hole of pressing flitch 6, thereby inside can not cause the bat to hinder and the tipping of protection mould.

Based on the above explanation, compared with the prior art, the invention has the beneficial effects that:

the invention has the beneficial effects that: this lead frame stamping die pilot pin increases at 2 roots of needle bar and prevents the recipient 3 that the pilot pin fracture drops, and its effect is stamping die blanking in-process, and the needle body is difficult for droing after the fracture, has avoided the needle body to take off after pressing the flitch inside the mould, causes the mould to collapse sword and the problem that the die collapses and splits, has guaranteed mould life and product quality, is favorable to improving lead frame's yields and production efficiency, reduces and makes into, and is practical reliable.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural view of the embodiment of the present invention.

Wherein, the needle cap 1, the needle bar 2, the extrusion cylinder 3, the expansion strip hole 4, the spring 5, the pressure plate 6 and the jackscrew 7.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to specific embodiments.

Example, as shown in fig. 1 to 2: the utility model provides a lead frame stamping die pilot pin, includes the pilot pin, the pilot pin is located 6 backs of pressure flitch and in the pilot pin profile complex pilot pin counter bore, the pilot pin includes by lower supreme body coupling's needle bar 2 and needle cap 1, needle bar 2 and needle cap 1 are connected, the one end outside that needle bar 2 and needle cap 1 are connected sets up recipient 3, a plurality of inflation strip holes 4 of the periphery evenly distributed of recipient 3.

The lower edge of the back of the pressure plate 6 is also provided with a positioning needle through hole for penetrating through the needle rod 2, and the needle point at the bottom end of the needle rod 2 is exposed out of the front of the pressure plate 6 by a certain height; the positioning needle is further provided with a fixing sleeve, and a jackscrew 7 is installed in the fixing sleeve; the jackscrew 7 is fixedly connected with the top of the needle cap 1 of the positioning needle through a spring 5.

When the die is closed, the pressure plate 6 is in contact with the female die for pressing, and the tip of the needle rod 2 enters the female die positioning hole and the product positioning hole, so that the positioning and guiding effects are achieved. If pay-off is unusual in the mould, the pilot pin can not fix a position and when pushing up the material area, stamping die blanking in-process, because needle cap 1, spring 5, jackscrew 7 interact, the needle cap 1 and the recipient 3 that lead to the pilot pin are at needle cap department fracture, the punching pressure who receives the blanking simultaneously then recipient 3 receives the extrusion and makes the outside inflation of inflation strip hole 4, and then 3 cards of inflation recipient are in the location pinhole, make cracked needle bar 2 can not drop from the pilot pin via hole of pressure flitch 6, thereby inside can not cause the bat of protection mould and hinder and the tipping, the needle body has been solved and has been patted inside the mould after the pressure flitch takes off, cause the problem that mould tipping knife and die burst.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through an intermediary profile, or both. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Claims

1. The utility model provides a lead frame stamping die pilot pin, includes the pilot pin, the pilot pin is located press flitch (6) back with pilot pin profile complex pilot pin counter bore, its characterized in that: the utility model discloses a needle location, including needle bar (2) and needle cap (1) by supreme body coupling down, needle bar (2) and needle cap (1) are connected, the one end outside that needle bar (2) and needle cap (1) are connected sets up recipient (3), a plurality of inflation strip holes (4) of periphery evenly distributed of recipient (3).

2. The positioning pin of the lead frame stamping die according to claim 1, characterized in that: the lower edge of the back of the material pressing plate (6) is also provided with a positioning needle through hole for penetrating through the needle rod (2).

3. The positioning pin of the lead frame stamping die according to claim 2, characterized in that: the needle point at the bottom end of the needle rod (2) is exposed out of the front surface of the pressure plate (6).

4. The positioning pin of the lead frame stamping die according to claim 1, characterized in that: the positioning needle is also provided with a fixed sleeve, and a jackscrew (7) is arranged in the fixed sleeve; the jackscrew (7) is fixedly connected with the top of the needle cap (1) of the positioning needle through a spring (5).