Study on FEM Simulation and Experiment of Cage Roll Forming of ERW Straight-welded Pipes;

It presents the basic structure composition,main function and application of this system and usage effect of ERP quality control system on longitudinal ERW pipe manufacturer.

Numerical simulation of cage roll forming of ERW pipe based on mixed hardening model;

The characteristic of heat effect zone of ERW pipe has a close relation with quality of welded pipe,it brings the method to stabilize and improve welding quality through research on width of heat effect zone,streamline angle and macro-structure under different process parameter.

This article briefly introduces production process flow and its main equipments of seamless ERW pipe of 20 steel,and analyzes cause of transverse crack occurred in production of seamless ERW pipe of 20 steel,and gives out the main measures to solve transverse crack.

Study on dynamic simulation of roll forming of ERW pipes;

It gropes and designs a method of three points bending roller type forming process design as per longitudinal welded pipe's transform rule.

In way of weld field,the article introduces application foreseeing of this technology,also discusses this technology application into 4 aspects:forming roller design and manufacturing,design of longitudinal welded pipe mill,the control of deform process and forming stress in longitudinal welded pipe in production,and the control of pipe residual stress in spiral welded pipe in production.

The inner burr removing technology is an integrant working procedure to produce high quality and high additional value longitudinal welded pipe.