Stamping round dot connecting combined die for metal plate

Abstract

The invention discloses a stamping round dot connecting combined die for a metal plate. The combined die comprises a male die and a combined movable female die, wherein the combined movable female die comprises a female die seat body and at least two die petals; after a clamping ring channel on the middle part of each die petal is integrally spliced with a clamping ring groove of the female die seat body, an elastic clamping ring is tightly embedded into the clamping ring channel; the bottom end of each die petal is provided with an oscillating rod; the inner side of the oscillating rod is provided with a spring seat; the female die seat body is correspondingly provided with a long groove; the bottom surface of the long groove is provided with a spring counter bore seat; a compression spring is arranged between the spring counter bore seat and the spring seat; the oscillating rod is positioned in the long groove; the top of the female die seat body is provided with a cylinder, a cylinder top surface and a step surface; the top end of each die petal is provided with a fan-shaped branch petal; the fan-shaped branch petal is provided with a fan-shaped petal bottom surface, a fan-shaped petal top surface, an arc-shaped surface and a fan-shaped surface; under the elastic supporting action of the compression spring, the arc-shaped surface of each die petal is attached to the surface of the cylinder; the fan-shaped petal bottom surface is tightly attached to the step surface; and fan-shaped edges get close to each other, so that the equally-divided arc-shaped surface is in an elastic folded state by taking the circumference of the cylinder as a joint surface.

Description

technical field [0001] The technology relates to a movable combination die for stamping of sheet metal parts, in particular to a movable combination die for stamping connection of sheet metal parts which is widely used in stamping equipment. Background technique [0002] The so-called stamping connection technology of sheet metal parts is to force the material to be connected to flow under the action of external force extrusion between the punch and its corresponding die, and form an inlaid connection after plastic deformation. This panel connection technology uses a simple geometric structure mold, utilizes the characteristics of stretching and deformation of metal panels, and utilizes the performance of metal material flow plastic forming, so that after the panels are connected, the outside is formed into a circular shape with one side concave and one side convex. Waist-shaped and various star-point shapes, the materials inside the boards flow to form interlocking clasps, ...

AI Technical Summary

Problems solved by technology

[0006] 1. The closed circular die has a simple structure and a small volume, which is suitable for the connection of miniature dots. However, compared with the dots, the diameter of the dots is larger and the plate is thicker. The plate will appear in the process of extruding the plastic deformation of the stamping dots. In the process, since the material flows in the closed circular die, the expansion force formed by compression splits the die

[0007] 2. Due to the closed circular die structure during the plate connection process, due to the material flow in the closed circular die, the expansion force formed by compression will hug the die and make demoulding difficult, and it is necessary to increase the demoulding Mold device to complete demoulding

[0008] 3. In order to strengthen the peripheral strength of the closed circular die, the outer diameter can only be increased. The unfavorable factor brought about by this is that the increase in mold volume will restrict the processing range of the plate connection, especially for the narrow connection parts of the plate.

[0009] 4. The active mold flaps and mold bases in the prior art are combined to form a circular die. The disadvantage of this structure is that it uses a partial circular arc to contact the opening and closing rotating joints. This structure has poor stability, especially in the process of connecting plates. When picking and placing workpieces, the concave mold is easily impacted, which makes the mold flap and the mold base easy to dislocate and cause processing accidents

[0010] 5. In individual schemes, a protective sleeve is provided on the periphery of the elastic rubber ring of the mold valve block and the mold base or the coiled coil spring. The purpose is to prevent the workpiece from directly impacting the mold and avoid dislocation of the mold valve and the mold base. The disadvantage of the structure is that the outer diameter of the circular die increases, which also restricts the narrow position of the plate connection

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