Molding method of ratchet wrench braking teeth

Abstract

The invention discloses a molding method of ratchet wrench braking teeth, which sequentially comprises the following steps of: firstly, primary blank cutting: cutting the primary blank into a plurality of plate-shaped primary materials with preset sizes through continuously punching and cutting; secondly, appearance molding: carrying out primary cold forging and punching on the continuously cut plate-shaped primary materials, extruding the primary materials by an upper mould and a lower mould, extending the primary materials on two side ends to form a bent arc shape, and sinking one side of the primary material to form an arc-shaped surface; thirdly, external teeth pressing: carrying out secondary cold forging and punching, pressing down the arc-shaped surface by a toothed mould to form external teeth; fourthly, blur removal: carrying out triple cold forging and punching on the primary materials with the external teeth, and removing residual blurs resulting from a continuous punching process on the surfaces of the primary materials to form semi-finished products; fifthly, thermal treatment: thermally treating the semi-finished products to eliminate internal residual stress and increase hardness and tensile strength of the semi-finished products; finally, surface treatment: carrying out sand-blasting and rust-preventing treatment on the thermally treated semi-finished product to prepare a finished ratchet wrench braking tooth.

Description

technical field [0001] The invention relates to a tooth forming method of a ratchet wrench, in particular to a tooth formed by continuous cold forging. Background technique [0002] Such as figure 1 and figure 2 As shown, in order to improve the efficiency of maintenance and demolition on the market, tools such as ratchet wrench (30) are often used as tools for maintenance and demolition, and the most important part of the ratchet wrench is the engagement and fixing of the internal ratchet and gear teeth to achieve The effect of the ratchet wrench in use, so the material and process of making the teeth are the key to the quality of the ratchet wrench. And the method for making a kind of ratchet wrench at present is as follows: image 3 As shown, mainly by metal powder metallurgy injection molding, including the following steps: [0003] mixing (a), mixing the powder of the metallic material for prefabricating teeth with a binder; [0004] Mixing (b), heating and stirri...

AI Technical Summary

Problems solved by technology

[0010] The main purpose of the present invention is to disclose a tooth-making method of ratchet wrench, so as to solve the technical problems that the mechanical structure of the existing ratchet wrench tooth-making is relatively brittle, and the tissue density is poor, and improve the performance of ratchet wrench tooth-making

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