hollow punch是什么意思

用法例句

Research on punching automation of bearing basket cage;

轴承筐形保持架冲孔自动化研究

Design of falling material and punching of chain plate;

链板落料冲孔工装的设计

Study on punching holes on thin steel sheet to be the same thickness as diametre with 70 steel punch;

70钢冲头对等径值厚度薄板冲孔技术

Deformation study of piercing on tubular parts;

管形零件冲孔过程的变形研究

Design of compound punching die for shaft cover with blanking-drawing-piercing-flanging-trimming;

轴盖落料拉深冲孔翻边修边复合模设计

Design of positioning mechanism in punching die of special pipe;

一种异形管坯冲孔模具的定位机构设计

Design of Compound Die of Cut-tandem-punch-flang;

落料拉深冲孔翻边复合模设计

Punching vertically model automatic caroboard -punching system;

直冲式全自动纹板冲孔系统

Analying the pipe punching hole each kind of form characteristic and the difficulty.

分析了管子冲孔工艺的各种形式特点及难点。