Blade grinding clamp of silicon steel sheet punching die punch

Abstract

The invention relates to a blade grinding clamp of a silicon steel sheet punching die punch. The punch is fixed at the end of a die rod. The end face of the punch is in a tool edge shape formed by two symmetrical inclined planes, and a first included angle is formed between each inclined plane and a plane perpendicular to the axial line of the die rod. The clamp comprises an upright cylindrical clamp body, wherein the clamp body is provided with a die rod mounting hole matched with the die rod, the clamp body is connected with a puller screw through a thread, the puller screw is communicated with the die rod mounting hole, a centering place parallel to the axial line of the die rod mounting hole is arranged on the side wall of the clamp body, the bottom face of the clamp body obliquely intersects with the axial line of the die rod mounting hole, a second included angle is formed between the bottom face of the clamp body and a plane perpendicular to the axial line of the die rod mounting hole, and the second included angle is equal to the first included angle. The blade grinding clamp of the silicon steel sheet punching die punch is convenient and rapid to clamp, improves blade grinding accuracy due to the fact that an angle is needless to be adjusted in blade grinding process, improves clamping efficiency due to convenient centering, can reduce unnecessary punch alloy grinding, and improves service life of the punch.

Description

Technical field [0001] The invention relates to a tooling fixture in the production process of a transformer, in particular to a sharpening fixture of a silicon steel sheet punching die punch. Background technique [0002] In the production and assembly process of the transformer core, a large number of silicon steel sheets with holes are used. Some silicon steel sheets need to punch up to 4 holes, so the frequency of use of punching dies is quite high. [0003] The punching die includes a punch and a lower die. The structure of the punch is like figure 1 As shown, it includes a die rod 1 and a punch 2 fixed at one end of the die rod 1. The end surface of the punch 2 is generally processed into two symmetrical inclined surfaces to form a knife-edge shape. Each inclined surface is between a plane perpendicular to the axis of the mold rod 1. The angle between is α. In order to reduce loss and burr requirements, the punch must be sharp and durable, so it needs frequent sharpening to...

AI Technical Summary

Problems solved by technology

It is inconvenient to adjust the angle by using a vise to clamp the sharpening of the punch. If the angle and alignment are not good, the alloy of the punch will be wasted and the service life of the punch will be reduced.

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