By the analysis and comparison of upsetting extrusion and cold forging technology,the upsetting extrusion technology on the countersunk square neck bolt is introduced in the paper.
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释义
通过两种工艺方案中成型凹模受力情况的分析比较,说明用镦挤工艺生产沉头方颈螺栓,可降低镦锻力,提高模具寿命,保证零件质
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