Method for producing common flat key through continuous drawing and continuous rolling process

Abstract

The invention relates to the field of continuous drawing and continuous rolling process mining equipment heat radiation, in particular to a method for producing a common flat key through a continuous drawing and continuous rolling process. According to the method, the production efficiency is high, central difference control of product h8 limit deviation is facilitated, the surface hardness is high, the material utilization rate is high, no annealing is needed, and carbon emission is avoided. The method comprises the following steps of rust removal, wherein surface floating surface removal is carried out on the surface of a wire through a chemical or physical method; head reducing, wherein one to two meters of the end of the wire rod wire subjected to full rust removal are straightened, and a dog machine is used for reducing till the wire rod wire can penetrate a mold drawing head; reducing, wherein a rolling reducing wire rod wire drawing head penetrates an alloy mold mounted on an inverted wire drawing machine for reducing work; blank making, wherein the surface of the wire rod wire with reducing completed is subjected to cold drawing and residual powder removal, the reducing drawing head of the wire rod wire penetrates a cold rolling mold, and the mold feed quantity is adjusted on the inverted wire drawing machine for blank making; and cold rolling forming, wherein a machining-quantity wire rod wire blank is subjected to h8-level precision central difference control forming straightening on a straightening forming cold rolling machine, and cutoff is achieved to form a flat key blank.

Description

technical field [0001] The invention relates to the field of heat dissipation of mining equipment in the continuous drawing and rolling process, in particular to a method for producing ordinary flat keys by adopting the continuous drawing and rolling process. Background technique [0002] At present, the national standard GB / T1096 common type flat key for key-connection transmission parts of general machinery parts in my country. The working surface b implements the h8 limit tolerance, and the geometric precision is very high. Since the tensile strength of the key should be greater than or equal to 590Mpa, the carbon content of the raw material should be around 45%. Mechanical finishing is difficult, the physical deformation of the material is obvious, and the product qualification rate is low. [0003] The existing domestic manufacturing methods of such products basically use raw material alloy mold cavity or cold rolling forming to process billet bar. This method is rel...

AI Technical Summary

Problems solved by technology

However, the surface hardness of the product is low, which affects the physical properties of the workpiece. At the same time, the carbon emission caused by repeated annealing of the material also has a negative impact on the environment, and the waste of resources is serious.