How To Improve The Sofa Zig Zag Spring's Quality?

- Nov 15, 2017-

How to improve the sofa zig zag springs' quality?

1.Choose the good wire materials 82B,and then make the test of tensile strength,make sure the tensile strength in the normal range. 

2.Have the QC in every production line.

4.Make sure the standard tempreture for the hot treatment 

3.Make the test for the springs,and adjust the data.