标准件螺栓在生产中一般都采用冷镦工艺,但长螺栓,特别是带十字槽的螺栓(图1)则难以冷镦生产。过去采用的是切削加工后压十字槽的工艺,但效率低,材料浪费,而且质量不稳定,易出现飞边和十字槽凹陷(图2)。我们经过试验,采用了温锻挤工艺方法解决了这一关键。 Standard bolts are generally used in the production of cold heading process, but long bolts, especially with a cross groove bolts (Figure 1) is difficult to cold heading production. In the past is the use of cutting cross-slot pressure after the process, but inefficient, material waste, and the quality is unstable, prone to flash and cross recess (Figure 2). We have been tested, using a warm forging extrusion process to solve this key.