Protection method of metal mold convex and concave mold:

　　 The protruding mold is called a convex mold, and the concave mold is called a concave mold. Because a set of molds is divided into upper mold and lower mold, according to the different installation methods of the mold, some of the upper mold is called convex mold, the lower mold is called concave mold, and some of the lower mold is concave. Protruding.

　　 Hardware mold punch refers to the punch or molding male fixed on the splint, and the concave mold is the knife edge or molding insert of the lower mold.

　　 Female mold, also called concave mold, also called lower mold, is generally the lower mold part. Male mold, also called punch, also called upper mold, generally refers to the upper mold part.

　　 To really distinguish between the punch and the concave mold, it depends on which side to define convex or concave.

　　 The role of punch and die is the main part of the hardware mold. The punch and the concave mold are processed into the required shape, and the plate to be processed on the punch is punched into the hole of the concave mold through the punch, or leaks out, or ejects from the concave mold. A required part is processed. The role of the convex and concave mold is to play two roles. One is that the hole is used as a concave mold, and the shape is used as a punch. The simple part is a gasket, which is stamped out at one time. Of course, corresponding to it, there must be a punch and a concave on the opposite side. mold. The punch is punched, and the die falls in shape.

In the process of hardware mold design and production, there will always be some small holes punching. Generally speaking, as long as the strength of the punch is enough, when the thickness of the material is greater than 1.5, the stamping mold can be produced. But for some small holes The design of punching punch and die still needs special attention. Here, the tribe will not discuss the issue of strength, just take a look at some commonly used methods to protect the punch and die.

When it comes to small-diameter punching, the impression is that it is roughly smaller than the same time. The thickness of the material corresponding to the φ1.0mm small-diameter hole is generally around 1.0mm. The actual situation is that for such a mold, if the guiding accuracy is not enough, such a mold, It will be very difficult to produce.

When designing small holes or small special-shaped punches, you must pay attention to the protection and reinforcement of the punch, and also pay attention to the gap of the mold template, the splint should be loosely matched, the stripping plate should be lightly and tightly matched, and the die should be placed according to the thickness of the material. The principle of the gap is that the die gap must be greater than the stripper gap.

In order to protect the strength and guiding accuracy of the punch in the design of the hardware mold, the punching punch adopts a countermeasure to guide the front end of the punch through the discharge plate (punch guide) to prevent the damage of the punch. The stripper plate is guided and strengthened. There is also the role of stripping. At the same time, in order to strengthen the punch, the punch generally adopts two stages, that is, the A punch we often talk about. The fixed plate adopts a large diameter punch, and a small hole consistent with the product requirements is used on the stripper plate, and then the countersunk head on the back of the stripper plate , Or make a two-section insert, one is a large hole and the other is a small hole, so that the small hole section is oriented, which ensures the punching accuracy of the punch and improves the strength of the punch.

　　 Generally, the gap between the fixed plate and the punch is 0.015mm on one side, and the stripper plate is 0.005mm on one side (the thin material can be 0.035mm on one side), and the gap between the fixed plate and the punch is generally 4% of the material thickness.

The main point of the design of the metal mold cavity is to prevent the blanking waste from accumulating in the cavity of the cavity. The key point of the problem lies in the large blanking force required and the amount of conflicting punching force. Also pay attention to the cavity Generally, the die insert is enlarged by more than 5mm on one side of the stamping shape; also pay attention to the foolproof of special-shaped parts. A large R angle or a small R angle is designed on the four R angles of the insert to prevent assembly errors in the direction.