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为国外某企业生产的挖掘机链轨总成在制造装配过程中,操作者在现场压装时,用自检量具检查4个准22.5 mm螺栓孔的孔距尺寸合格,但离开现场一段时间,由专检人员仍用自检量具再行检查时,发现有部分孔距不合格,为此与国外企业商讨改变了链轨总成图纸的设计要求,将原4个螺孔的孔距位置尺寸标注采用的几何公差中的独立原则改为采用几何公差相关要求中的最大实体要求,制造时操作者仍采用自检量具,专检人员用新设计的专用量具,仍然按原生产工艺生产的产品达到了设计与实用性能要求,同时提高了生产效率及经济效益,降低了工人的劳动强度。
For the excavator chain track assembly made by a foreign company during the manufacturing and assembly process, the operator checks the four quasi-22.5 mm bolt hole sizes with self-test measuring instruments when the machine is installed on site, but after leaving the site for a period of time, By the special inspection staff is still using self-test measuring tools and then check again and found that some of the hole spacing failed to discuss with foreign companies changed the design requirements of the link assembly drawings will be the original four holes pitch position size The principle of independence of the geometric tolerances used in the labeling is replaced by the maximum physical requirement of the relevant requirements of the geometric tolerances. The operator still adopts the self-checking gauges when manufacturing, the special examiners use the newly designed special gauges, and still produce the products according to the original production process Reached the design and practical performance requirements, while improving production efficiency and economic benefits, reducing the labor intensity of workers.