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北京人民机器厂的职工在大搞质量的运动中,发扬了自力更生、奋发图强的精神,在厂党委正确的领导下,在北京市技术协作活动积极的支持和帮助下,突破了利用普通车床(捷克RS1000×5000)加工三级精度丝杠的技术关键。该厂生产的C61100B型1米普通车床的丝杠(如图1)为三级精度,全长6172毫米,螺纹部分长度为5175毫米,外径80毫米。由于工艺,运输及保管的困难,丝杠是采用左、中、右三段接料而成,材料45钢,重量192公斤。丝杠的技术要求如下:(1)螺距误差:单螺距允差±12μ,300毫米内积累误差不得大于35μ,丝杠全长内积累误差不得大于80μ。 (2)丝杠螺纹中径的椭圆度0.015毫米。(3)丝杠外径尺寸在各个与轴线垂直的剖面内必须相等,其允差为0.02毫米。(4)丝杠外径的跳动允差在全长上为0.3毫米。(5)φ45d、φ60(?)_c及φ50d对丝杠外径φ80径向跳动允差0.02毫米。在加工过程中遇到了一系列问题,请看他们是如何解决的。
With the correct leadership of the factory party committee and the active support and assistance of technical cooperation activities in Beijing, the staff of Beijing People’s Machinery Factory carried forward the spirit of self-reliance and work hard in quality campaign and broke through the use of ordinary lathe (Czech Republic RS1000 × 5000) Three-level precision machining screw technology key. The factory production C61100B 1-meter ordinary lathe screw (Figure 1) for the three levels of accuracy, length 6172 mm, thread length of 5175 mm, an outer diameter of 80 mm. Due to the difficulty of technology, transportation and storage, the lead screw is made of the left, middle and right sections of the material, the material 45 steel, weight 192 kg. Lead screw technical requirements are as follows: (1) pitch error: single pitch tolerance ± 12μ, accumulation error within 300 mm shall not be greater than 35μ, the cumulative error within the screw length shall not be greater than 80μ. (2) Ovality of screw thread diameter 0.015 mm. (3) The dimensions of the screw outer diameter must be equal within each section perpendicular to the axis, with a tolerance of 0.02 mm. (4) Bending tolerance of the lead screw diameter is 0.3 mm over the entire length. (5) φ45d, φ60 (?) _ C and φ50d on the screw diameter φ80 radial runout tolerance 0.02 mm. In the process of processing a series of problems, see how they are solved.