CN107671167B - Method for preventing punching plug scrap by punching and flattening - Google Patents

Abstract

The application discloses a method for stamping and flattening to prevent punching plug scraps, which comprises the following steps of 1, processing and shaping a flattening punch positioned on a mould of a formed product into a yield step; step 2, erecting the formed product die provided with the flattening punch on a punching machine and debugging; step 3, starting the punch to enable the forming product die to punch and cut the material belt to form a primary product, then punching and flattening the primary product through the flattening punch to form a flattening area, wherein a downward concave position which is matched with the lower end surface of the flattening punch and is concave downwards is formed on the flattening area, and the downward concave position is used for forming the material with the same thickness on the left side and the right side of the downward concave position; and 4, matching the fine cutting punch positioned on the mold of the molded product with the fine cutting chip removal hole to punch and flatten the area, so that the chips formed by punching the fine cutting punch can drop out of the fine cutting chip removal hole in a parallel state, the chips can be smoothly removed, the chips can be prevented from blocking the chip removal hole and breaking the fine cutting punch, and meanwhile, the production efficiency can be improved to meet the production requirement.

Description

The method of punching and flattening to prevent punching chips

【Technical field】

The present application relates to the technical field of punching and chip prevention, and in particular, to a method for punching and flattening to prevent punching and chip plugging.

【Background technique】

With the development of information technology, the demand for metal lead frames in integrated circuit (IC) chips has increased, and the shape has become more refined and high-precision. There are two production methods for metal lead frames: corrosion processing and stamping processing. Although corrosion processing can achieve very fine precision, it cannot achieve high production efficiency and low production cost. With the rapid decline in the price of IC chips represented by computer memory sticks and CPUs, the use of stamping and forming metal lead frames is a good way to reduce the cost. An important way to improve the price of IC chips and improve production efficiency.

However, during the stamping production process of the existing metal lead frame, for example, as shown in Figures 1 and 2 (100a is the existing flattening punch, 20012a is the scrap formed after being punched by the fine-cutting punch), the preliminary forming The metal lead frame is subjected to the fine cutting process after the flattening process, and in the fine cutting process, it is easy to show the phenomenon of inclined blanking due to the inconsistency of the material thickness on the left and right sides of the scrap, which is easy to be blocked in the fine cutting chip removal. In the hole, the precision cutting punch is often broken, which not only reduces the production efficiency and cannot meet the production demand, but also greatly increases the maintenance cost of the production enterprise. Therefore, it has caused many troubles to the production enterprise.

[Content of the invention]

The above-mentioned technical problem to be solved by this application is to provide a method for punching and flattening to prevent punching and chipping.

In order to solve the above-mentioned technical problems, the application is realized through the following technical solutions:

The method of punching and flattening to prevent punching chips includes the following steps:

Step 1. The flattening punch located on the molding product mold is processed and formed into a step of giving way, and the step of giving way is located on the lower side of the flattening punch and the lower end of the flattening punch is protruded downward;

Step 2, installing the flattening punch with the step of giving way to the molding product mold, and erecting the molding product mold on the punching machine, and then performing stamping debugging;

Step 3. Start the punching machine so that the forming product mold punches the material strip to form the preliminary product, and then punches and flattens the preliminary product through the flattening punch to form a flattening area on the preliminary product. The flattening area is formed with a lower concave position that is adapted to the lower end face of the flattening punch and is concave downward, and the lower concave position is used to make the thickness of the material located on the left and right sides of the flattening punch consistent;

Step 4. The fine-cutting punch located on the molding product mold is matched with the fine-cut chip removal hole to punch the flattening area, and the horizontal length of the fine-cutting punch is longer than the horizontal length of the lower concave position, Therefore, the waste chips punched by the finishing punch fall out of the finishing chip hole in a parallel state.

In the above-mentioned method of punching and flattening to prevent punching and chipping, the number of the step-aside steps is one, and it is located on the lower right side of the flattening punch.

As mentioned above, the method of punching and flattening to prevent punching and plugging, the step of giving way includes the upper side of the step on the upper side of the lower end face of the flattening punch and the upper side of the step and the upper side of the step. Describe the connecting surface between the lower end faces of the flat punch.

As mentioned above, the method of punching and flattening to prevent punching and clogging, the connecting surface is an inclined connecting surface, and the inclination direction of the inclined connecting surface is from top to bottom and is inclined toward the left side of the flattening punch. .

In the above-mentioned method of punching and flattening to prevent punching and clogging, the vertical distance between the upper side surface of the step and the lower end surface of the flattening punch is 0.08 mm.

Compared with the prior art, the above application has the following advantages:

The method of punching and flattening to prevent punching and plugging of the present application uses the flattening punch having the step to punch and flatten the preliminary product to form the lower recess, and the lower recess is used for The thickness of the material located on the left and right sides of the material is the same, so that the waste chips finely cut by the fine-cutting punch can be discharged from the fine-cut chip removal hole in a left-right parallel state, so as to achieve the purpose of smooth chip removal and anti-clogging At the same time, it can also prevent the punches from breaking due to clogging of the chip removal hole by waste chips, which can not only greatly improve the production efficiency to meet the production needs, but also greatly reduce the maintenance cost of the production enterprise, which is helpful for the further expansion of the production enterprise. Production.

【Description of drawings】

FIG. 1 is a schematic diagram of a conventional flattened metal lead frame.

FIG. 2 is a schematic diagram of a conventional punched and flattened metal lead frame.

FIG. 3 is a schematic diagram of the preliminary product (metal lead frame) in the method of punching and flattening to prevent punching and plugging of the present application.

FIG. 4 is a schematic diagram of the flattening punch flattening the preliminary product in the method of punching and flattening to prevent punching and plugging in the present application.

FIG. 5 is the flattened area formed after the preliminary product is flattened by the flattening punch in the method of punching and flattening to prevent the punching and cutting of the chip in the present application.

FIG. 6 is a schematic diagram of the fine-cutting punch punching the flattening area in the method of punching and flattening to prevent the punching and chipping of the present application.

FIG. 7 shows the scraps formed after the finishing punch punches the flattened area in the method for punching and flattening to prevent the punching and clogging, and the scraps fall out of the fines in a parallel state. Schematic diagram of the chip removal hole.

【Detailed ways】

The present application will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

As shown in Figure 3-7, the method of punching and flattening to prevent punching chips includes the following steps:

Step 1. The flattening punch 100 located on the molding product mold is processed and formed to give way to a step, and the abdication step is located on the lower side of the flattening punch 100 and makes the lower end of the flattening punch 100 protrude downward. ;

Step 2, installing the flattening punch 100 with the step of giving way to the molding product mold, and erecting the molding product mold on the punching machine, and then performing stamping debugging;

Step 3. Start the punching machine so that the forming product mold punches the material strip to form the preliminary product 200 , and then punches and flattens the preliminary product 200 by the flattening punch 100 to form a punching on the preliminary product 200 . The flattening area 2001, the flattening area 2001 is formed with a lower concave position 20011 which is adapted to the lower end surface of the flattening punch 100 and is concave downward, and the lower concave position 20011 is used to make the left and right sides of the flattening area 20011. The material thickness is the same;

Step 4, punching the flattening area 2001 by matching the fine-cutting punch 300 on the molding product mold with the fine-cutting chip removal hole, and the horizontal length of the fine-cutting punch 300 is longer than the lower recess 20011 Therefore, the waste chips 20012 punched by the finishing punch 300 fall out of the finishing chip hole in a parallel state.

The method of punching and flattening to prevent punching and plugging of the present application uses the flattening punch 100 with the step to punch and flatten the preliminary product to form the lower recess 20011. The recesses 20011 are used to make the thickness of the material on the left and right sides of the same, so that the waste chips 20012 finely cut by the fine-cutting punch 300 can be discharged from the fine-cutting chip removal hole in a parallel state on the left and right, to achieve The purpose of smooth chip evacuation and anti-clogging, and at the same time, it can also avoid the chip from clogging the chip evacuation hole and cause the punch to break, which can not only greatly improve the production efficiency to meet the production needs, but also greatly reduce the maintenance cost of the production enterprise. It will help manufacturers to further expand production.

The number of the step for letting go is one, and it is located on the lower right side of the flattening punch 100 . Its advantage is to meet the actual production needs.

The escalating step includes an upper side of the escalating step located on the upper side of the lower end surface of the flattening punch 100 and a connecting surface between the upper side of the escalating step and the lower end surface of the flattening punch 100 . The connecting surface is an inclined connecting surface, and the inclined direction of the inclined connecting surface is from top to bottom and is inclined toward the left side of the flattening punch 100 . The advantage is that it is convenient to connect the lower end surface of the flattening punch 100 from the upper side surface of the step aside.

The vertical distance between the upper side of the step and the lower end of the flattening punch 100 is 0.08 mm. Its advantage is to meet the actual production needs.

In summary, the embodiments of the present application have been described in detail, but the present application is not limited to the above-mentioned embodiments. Even if it makes various changes to this application, it still falls within the protection scope of this application.

Claims (5)

1. the method of punching and flattening to prevent punching and plugging, it is characterized in that: comprise the following steps: Step 1. The flattening punch (100) located on the molding product mold is processed and formed to give way to a step, and the abdication step is located on the lower side of the flattening punch (100) and makes the flattening punch (100) ) The lower end protrudes downward; Step 2, installing the flattening punch (100) with the step of giving way to the molding product mold, and erecting the molding product mold on the punching machine, and then performing stamping debugging; Step 3. Start the punching machine so that the mold punches the material strip to form the preliminary product (200), and then punches and flattens the preliminary product (200) by the flattening punch (100) to form the preliminary product (200). The flattening area (2001) on the (200), the flattening area (2001) is formed with a lower concave position (20011) that is adapted to the lower end surface of the flattening punch (100) and concave downward, The lower concave position (20011) is used to make the thickness of the material on the left and right sides thereof consistent; Step 4. The fine-cutting punch (300) located on the molding product mold cooperates with the fine-cutting chip removal hole to punch the flattened area (2001), and the horizontal length of the fine-cutting punch (300) is longer than The lateral length of the lower recess (20011), so that the scrap (20012) punched by the finishing punch (300) falls out of the finishing chip hole in a parallel state. 2. The method according to claim 1, characterized in that the number of said step is one, and it is located on the lower right side of the flattening punch (100). . 3. The method according to claim 2, wherein the step for giving way comprises a step for giving way on the upper side of the lower end surface of the flattening punch (100). The side surface and the connecting surface between the upper side surface of the step and the lower end surface of the flattening punch (100). 4. The method according to claim 3, characterized in that: the connecting surface is an inclined connecting surface, and the inclined direction of the inclined connecting surface is from top to bottom and toward all directions. The flat punch (100) is inclined in the left direction. 5. The method according to claim 3, wherein the vertical distance between the upper side of the step and the lower end of the flattening punch (100) is 0.08 ㎜.