CN102327950B - Concentric stamping die - Google Patents

Abstract

The invention discloses a concentric stamping die, which includes an upper mold base, a lower mold base and a punch, and is characterized in that it also includes an upper pressing plate, a hole turning die and a lower stripping plate, and the turning hole die includes an upper turning die Hole die and down-turning die, the down-turning die is arranged directly below the up-turning die, the center of the die mouth of the up-turning die and the center of the die mouth of the down-turning die are between On the same axis; the upper turning die is arranged between the upper platen and the lower stripper plate, the lower turning die is arranged on the lower mold base, below the lower stripping plate, and the inner turning die There is a block in the turning hole; the punch includes an upper punch rod, a lower punch rod and a top cutter head, the diameter of the lower punch rod is smaller than that of the upper punch rod, and the punch is in a trapezoidal column shape. The invention uses one punch to turn two holes at the same time, which ensures the concentricity of the turned holes, has the advantages of simple structure, convenient use and easy operation, and can effectively ensure the concentricity of parts requiring concentric holes.

Description

Concentric stamping die

technical field

The invention relates to a mold, in particular to a mold for punching concentric holes.

Background technique

For some workpieces that require concentric holes, such as turning holes or punching holes on both end faces of the workpiece, the axes of the holes are required to be on a straight line. When stamping such workpieces, the two holes are usually punched separately, but Due to the displacement of the workpiece and the change of stamping conditions, it is difficult to avoid the deviation of concentricity between the two holes. For example, the hole of the guide sleeve of the headrest of the car seat, etc., has a high requirement for concentricity in the production process.

Contents of the invention

In order to solve the above technical problems and ensure the positional accuracy of the concentric holes of the workpiece, the invention provides a concentric stamping die, comprising an upper die base, a lower die base and a punch arranged on the upper die base, characterized in that:

It also includes an upper platen for pressing materials, a hole turning die and a lower stripping plate, and the hole turning die includes an upper turning hole die and a lower turning hole die, and the lower turning hole die is arranged on the upper turning hole concave die. Directly below the mold, the axis of the die opening of the upturning die and the axis of the die opening of the downturning die are on the same axis;

The upper turning hole die is arranged between the upper platen and the lower stripper plate, the lower turning hole die is arranged on the lower mold base, and is located below the lower stripping plate, and the lower turning hole die is provided with a turning hole Blocking in the hole;

The punch includes an upper punch, a lower punch and a top cutter head, the diameter of the lower punch is smaller than that of the upper punch, and the punch is trapezoidal columnar.

Further technical solutions include:

A limit plate is provided between the upper turning hole die and the lower stripper plate, and a limit column with the upper and lower ends of the limit plate is respectively provided at both ends of the limit plate, and the top of the limit column and the upper The pressing plate is connected, and its bottom is connected with the lower stripping plate. The limiting plate is used to control the distance between the upturning mold and the downturning mold.

The axis centers of the die openings of the upper turning die and the lower turning die die are on the same vertical straight line.

The bottom of the detached block in the turning hole is provided with an elastic reset device.

The connection between the upper punch rod and the lower punch rod is set as an inclined plane.

In the present invention, two sets of upper and lower dies are set in one stamping, and the parts of the workpiece that need to be processed with concentric holes are respectively fixed at the positions between the upper platen and the upper turning die, and between the lower stripping plate and the lower turning die. The axes of the two sets of dies are set on the same axis, and the holes are turned up and down twice through one punch of the punch. The invention has the advantages of simple structure and convenient operation, greatly improves the concentric precision of concentric holes and workpieces, and improves product quality.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a top view structural schematic diagram of the present invention.

Detailed ways

In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific implementation methods.

As shown in the figure, a concentric stamping die includes an upper mold base, a lower mold base, and a punch 1 arranged on the upper mold base, and also includes an upper pressing plate 2 for pressing materials, a punching die and a lower stripper plate 7 , the hole turning die includes an upper turning hole die 3 and a lower turning hole die 5, the lower turning hole die 5 is arranged directly below the upper turning hole die 3, and the die opening of the upper turning hole die 3 The axis and the axis of the die mouth of the downturning die 5 are on the same axis, as shown in Figure 1.

After the position of the material is set on the punching die, the upper pressing plate 2 is pressed on the punching material. The following stripper plate 7 is positioned at the below that the hole-turning die 3 is arranged on, and is pressed on the hole-turning material. Described down turning hole die 5 is arranged on the lower mold base, is positioned at following stripping plate 7 below, makes the axial center of turning up hole die 3 and down turning hole die 5 die openings on the same vertical line. A limit plate is provided between the upper turning die 3 and the lower stripper plate 7, and a limit column 4 with the upper and lower ends of the limit plate is respectively provided at both ends of the limit plate, and the top of the limit column 4 is It is connected with the upper platen 2, and its bottom is connected with the lower stripping plate 7, which is used to control the distance between the upper and lower two sets of moulds. The bottom of the hole-turning die 5 is provided with a turning-off inner block 6, and the bottom end of the turning-back inner block 6 is provided with an elastic reset device.

The punch 1 includes an upper section punch, a lower section punch and a top cutter head, and the diameter of the lower section punch is smaller than the upper section punch, so that the punch 1 is trapezoidal columnar, and the connecting position between the upper section punch and the lower section punch is set for the slope.

The above has disclosed the present invention with preferred embodiments, but it is not intended to limit the present invention, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation methods fall within the protection scope of the present invention.

Claims (4)

1. Concentric punching die comprises upper bolster, die shoe and is arranged on drift on upper bolster, it is characterized in that:

The top board, hole flanging die and the lower stripper that also comprise binder, described hole flanging die comprises hole flanging die and lower hole flanging die, described lower hole flanging die be arranged on the hole flanging die under, the die mouth axle center of the die mouth axle center of upper hole flanging die and lower hole flanging die is on same axis;

Described upper hole flanging die is arranged between top board and lower stripper, and described lower hole flanging die is arranged on die shoe, is positioned at below lower stripper, is provided with in described lower hole flanging die and takes off piece in hole flanging;

Described drift comprises epimere jumper bar, hypomere jumper bar and top cutter head, and described hypomere jumper bar diameter is less than the epimere jumper bar, and described drift is trapezoidal column.

2. a kind of Concentric punching die according to claim 1, it is characterized in that: be provided with a limiting plate between described upper hole flanging die and lower stripper, described limiting plate two ends respectively are provided with the limited post of perforation limiting plate in two ends Shang Xia, described limited post top is connected with top board, and its bottom is connected with lower stripper.

3. a kind of Concentric punching die according to claim 1 and 2 is characterized in that: take off the piece bottom in described hole flanging and be provided with elasticity reset device.

4. a kind of Concentric punching die according to claim 1 and 2 is characterized in that: the position that is connected between described epimere jumper bar and hypomere jumper bar is made as the inclined-plane.

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