Process treatment of R-shaped part of tubular heater
Except for straight tube products, the geometric shape of tubular heater is almost everywhere in the manufacturing process, and the characteristic status of the R circle during the use of the heating tube and the temperature parameter of the effective heating area of the straight line are greatly different; and The life of the heating tube of high-load products accounts for more than 90% of the life of the tube, including pressure resistance. Due to this reason, the percentage of breakdown is as high as 80% or more; the pipe breaking and other phenomena caused by the influence of parameters such as hardness and yield strength during the formation of the R circle during the pipe manufacturing process have caused great pipe manufacturing and quality control future trouble. In short, it is currently a hidden common problem in the electric heating element industry. To this end, after analyzing the opinions of various parties, analyze this related content for supply.
Analysis of Causes of Tube Breaking and Cracking in the Bending Process
From the point of view of the process design that requires geometric forming when the metal pipe is filled with magnesium powder, the main factors that cause the pipe to break during the bending process:
The hardness of the shell material is too large, which has problems in the selection of raw material materials and process problems. The main material problems are iron pipes and stainless steel pipes, which are caused by inappropriate yield strength caused by excessive annealing hardness, and process problems such as The cold surface hardening strength of the tube surface caused by the shrinking of the filled tube is caused by the increase of the cold hardening strength of the tube surface. This part of the content will often be touched when the small and medium enterprises are just starting.