• CN：11-2187/TH
• ISSN：0577-6686

›› 1994, Vol. 30 ›› Issue (5): 47-49.

• 论文 •

### 平砧拔长矩形截面毛坯的新理论

1. 东北重型机械学院
• 发布日期:1994-09-01

### NEW THEORY OF STRETCHING A BLANK WITH A RECTANGULAR CROSSING SECTION BETWEEN FLAT PLATENS

Liu Zhubai

1. Northeast Heavy Machinery Institute
• Published:1994-09-01

Abstract: In the aspect of the stretching technology theory, it is demonstrated that mere a technological parameter-tool width ratio is inadeguate, that only when another technological parameter-blank width ratio is replendished, can the stress state in the center zone of stretching blank be correctly described and can the quality of forging be effectively controlled. The expound has been testified by experiments. The stretching technology which requires two technological parameters——blank width ratio and tool width ratio are simultaneously used to control the internal quality of forging is called L Z technology.