A kind of graphite carbon brush anti-overpressure single-die punching die and method thereof

Abstract

The invention discloses a single-mode punching die for over-voltage of a graphite carbon brush. The single-mode punching die comprises a single-mode punching die group, wherein the single-mode punching die group comprises a plurality of single-mode punching die main body, the single-mode punching die main body comprises an intermediate die, limitation fixed posts are fixedly arranged at the top and the bottom of the intermediate die, a die groove is formed in the intermediate die in a penetrating way, a limitation sliding groove is formed in an inner wall of the die groove, an inclination surface is arranged at an end part of the limitation groove, an upper die and a lower die are arranged in the die groove, the lower die is arranged at the bottom of the upper die, limitation fixed blocksand limitation sliding blocks are fixedly arranged at two side surfaces of the upper die and the lower die, and the limitation sliding block is adaptive to the limitation sliding groove. By the single-mode punching die, a secondary limitation effect can be achieved, the upper die is further prevented from being excessively pressed, so that the head and the body of the punched graphite carbon brushare consistent in proportion, dark crack and head strength instability are prevented, and the actual demand can be satisfied.

Description

technical field [0001] The invention relates to the technical field of moulds, in particular to a single-die punching die for preventing overpressure of a graphite carbon brush and a method thereof. Background technique [0002] The utility model patent of the patent application publication number CN 202076665 U discloses a single-die punching die for graphite carbon brush anti-overpressure, which includes an upper die punch, a female die, a slider and a lower die punch; Die cavity, the upper die punch is slidably set on the upper part of the cavity of the fixed die, the lower die punch is slidably set on the lower part of the cavity of the fixed die, the end of the upper die punch is provided with a forming boss, and the slider is slidably set in the cavity of the fixed die In the cavity, a limit block is arranged on the punch of the lower die. It is recorded in the technical proposal that the mold can be formed continuously on the existing single-mode die frame, and the c...

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Problems solved by technology

[0003] However, after actual use, it can be seen that when the upper die punch and the lower die punch in this technical solution are used to suppress the graphite carbon brush, there is no limit mechanism for the upper die punch and the slide block used to suppress the graphite carbon brush head. , so the effect of preventing overpressure cannot be achieved. Therefore, in actual use, the graphite carbon brushes punched out still have the disadvantages of inconsistent head and body forming proportions, dark cracks as a whole, and unstable head strength, which cannot meet the actual needs. need

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