CN202278062U - Fine blanking extruding device - Google Patents

Abstract

The utility model discloses a fine blanking extrusion device, which comprises a punch seat, a punch and a die, and a punching hole is opened on the die; the punching hole is provided with an upper section, a Cone section and lower section, the inner diameter of the upper section is the punching design dimension D, the inner diameter of the lower section is the design dimension of the punch, and the conical section connects the upper and lower sections. When stamping, the upper section of the punching hole can ensure that the thick plate is punched out, and the punched cone section and the lower section can squeeze the punched plate, correct the collapse angle and burr on the edge of the stamping part, and make the surface of the thick plate part collapse and The burr has been completely eliminated, and the quality of the parts has been improved to a certain extent.

Description

Fine blanking extrusion device

technical field

The utility model relates to a stamping die, in particular to a fine blanking extrusion device.

Background technique

There are many types of stamping dies, and punching dies are one of them. The blanking die is a die that separates the plates. Its typical structure is shown in Figure 1, mainly including a punch base 1, a punch 2, and a die 3. The die 3 has a punching hole 31. During production, the shape and size of the punch 2 and the punching hole 31 are designed according to the size and shape of the stamping part. Generally speaking, in order to ensure smooth stamping, the design dimension d of the punch 2 should be smaller than the design dimension D of the punching hole 31 .

However, when punching a thick plate, due to the thicker plate, in order to ensure the smooth separation of the plate, the gap between the design dimension d of the punch and the design dimension D of the punching hole is generally larger, so that the stamped part 4 obtained by punching is in the The lower edge is prone to collapse a, and the upper edge is prone to burrs b (as shown in Figure 2). Therefore, the punching of thick plates in the prior art cannot obtain high-precision dimensions, and the quality cannot be guaranteed.

Utility model content

In view of defects such as slump and burrs in the existing thick plate blanking process, the technical problem to be solved by the utility model is to provide a fine blanking extrusion device that can precisely blank thicker plates.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A fine blanking extrusion device, including a punch seat, a punch and a die, and a punching hole is opened on the die; the punching hole is provided with an upper section, a tapered surface section and a lower section along the axial direction from top to bottom , the inner diameter of the upper section is the punching design dimension D, the inner diameter of the lower section is the design dimension of the punch, and the taper section connects the upper and lower sections.

The height of the conical surface section is 1/3 of the thickness of the punched plate, and the height of the upper section is 2/3 of the thickness of the plate.

After adopting the above scheme, because the utility model designs the punching hole of the blanking die into a three-section structure, the upper section is the design size of the traditional punching hole, and the lower section is the design size of the punch, and the two sections are connected by a cone section, so that When stamping, the upper section of the punching hole can ensure that the thick plate is punched out, and the punched cone section and the lower section can squeeze the punched plate, correct the collapse angle and burr on the edge of the stamping part, and make the surface of the thick plate part collapse and The burrs are completely eliminated, and the quality of the parts is improved to a certain extent, so that the precision machining of thick plates can be realized.

Description of drawings

Fig. 1 is the structural representation of existing blanking die;

Fig. 2 is a schematic diagram of a thick plate stamping part processed by an existing punching die;

Fig. 3 is a structural representation of the utility model;

Fig. 3A is a partially enlarged view of the punching part of the utility model;

Fig. 4 is a schematic diagram of a thick plate stamping part processed by the device of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

What the utility model discloses is a fine blanking extrusion device, as shown in Fig. 2 and 3, which is a preferred embodiment of the utility model. The fine blanking extrusion device mainly includes a punch base 1, a punch 2 and a die 3, and a punching hole 31 is opened on the die 3.

The key of the utility model is: the punching hole 31 is provided with an upper section 311, a tapered surface section 312 and a lower section 313 from top to bottom in the axial direction, the inner diameter of the upper section 311 is the punching design dimension D, the lower section 313 The inner diameter is the design dimension d of the punch, and the taper section 312 connects the upper and lower sections. The height of the conical section 312 can generally be 1/3 of the thickness of the board, while the height of the upper section 311 is 2/3 of the thickness of the board.

After the punching hole 31 is improved, the size of the upper section 311 above the punching hole 31 can ensure that the thick plate is punched out, and the conical surface section 312 and the lower section 313 below the punching hole 31 can squeeze the punched sheet material and correct the stamping part Edge collapse and burrs (as shown in Figure 4), thereby improving the quality of parts.

Claims (2)

1. a smart impact extrusion pressure device comprises convex mould base, punch and die, on die, has punching; It is characterized in that: from top to bottom according to being provided with epimere, conical surface section and hypomere, the internal diameter of this epimere is punching design size D vertically in described punching, and the internal diameter of this hypomere is the punch design size, and said conical surface section connects two sections.

2. smart impact extrusion pressure device according to claim 1, it is characterized in that: the height of said conical surface section is 1/3 of a pressing sheet material thickness, and the height of said epimere is 2/3 of a sheet metal thickness.

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