A method for medium-high-frequency induction heating and low-stress precision cutting of rod and tube materials

Abstract

A low-stress and high-efficiency precise blanking method for medium-high frequency inductive heating of a rod tube material is characterized in that the rod tube material is put on a feeding mechanism and then is fed in an inductive heating device; the inductive heating device can control heating time and a surface layer heating depth in a V-shaped groove of the rod tube material through adjusting parameters, such as heating frequency, current magnitude and the like, so as to finish quick heating to the V-shaped groove of the rod tube material; and then, the heated rod tube material is fed in a blanking mechanism, and is fixed by a rod tube material fixing sleeve; circular periphery loads are loaded in the radial direction of the rod tube material; and blanking is implemented by using a stress concentration effect, a heat stress effect and a fatigue break mechanism of the rod tube material. The method has the advantages of high efficiency, low energy consumption, material conservation and good blanking quality.

Description

technical field [0001] The invention relates to the technical field of cutting metal rods, in particular to a medium-high-frequency induction heating, low-stress, high-efficiency and precise cutting method for rods and tubes. Background technique [0002] The blanking of metal bars widely exists in the preparation process of cold extrusion, die forging, metal chain pins, rolling bearing rollers, pin standard parts and shaft parts, and in these blanking processes, the amount of blanking is huge, For example, the hometown of chains in Jinhua, Zhejiang Province can produce metal chains with a length of hundreds of millions of meters every year, and Beijing Needle Roller Bearing Factory needs tens of millions of needle rollers every year. However, the current traditional shearing, sawing, high-energy cutting and other blanking methods have problems such as low material utilization rate, large blanking force, low production efficiency, high energy consumption, and poor section qu...

AI Technical Summary

Problems solved by technology

[0003] The traditional blanking methods include lathe cutting and sawing. Although these two blanking methods can obtain a flat section, they have disadvantages such as low production efficiency and waste of raw materials.

For this reason, in the subsequent industrial production, punching machines or special bar shears were widely used for shearing and blanking. However, the common shearing and blanking method has large blanking force, high energy consumption, and the section of the bar is obviously In order to meet the requirements of the next process such as cold extrusion, it is necessary to arrange a process of turning and flattening the section after ordinary shearing and blanking, which reduces production efficiency, wastes materials and increases production costs.

Images