方颈螺栓是我厂生产的敞车零件之一。改进前是单个打,在质量方面虽无多大问题,但生产效率很低,直接影响了敞车的产量跃进计划。在工艺革命运动中,经过工人和技术人员的研究,创造了一模双边四锻法。不但保证产品质量,更重要的是提高了生产率。班产量由540个提高到1200个。锻件如图1所示。两个锻在一起,中间留5公厘的车刀口。每次锻两根(即一次锻四个方颈螺栓)。其工艺 Square neck bolt is one of the gondola parts manufactured by our factory. Before the improvement is a single hit, although not much in quality problems, but the production efficiency is very low, a direct impact on the gondola production leap forward plan. In the process of revolutionary movement, through the study of workers and technicians, to create a model of bilateral four forging method. Not only to ensure product quality, more importantly, improve productivity. Class production increased from 540 to 1200. Forgings shown in Figure 1. Two forging together, leaving 5 mm in the middle of the turning edge. Forged two each (that is, a forging four square neck bolt). Its craft