Cracks may occur in the centre of the remainder of a billet during bar - bar combinedextrusion if the original height or the remaining height of the billet is short.
在杆杆型复合挤压时，如果坯料原始高度不大或剩余高度较小，则可能在剩余坯料的中部出现开裂。
2
A powerful drawing-thickening technology was prompted for double-cup-shaped workpieces, it combined the characteristics of cold extrusion with drawing process.
结合冷挤压与拉深工艺的特点，以双杯形工件为对象，开展了冲锻成形过程的强力拉深增厚工艺研究。
3
The prestressing force in combined dies to be used for cold extrusion of bearing outer race by the two mathematical models is calculated and compared with the results obtained by Lame formulae.