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一、前言 活塞销在发动机是连接活塞和连杆,传递动力的重要零件,与活塞销孔的配合采用高精度的重要零件,与活塞销孔的配合采用高精度的配合,需要一个适当的间隙,它能否得到保证,将直接影响到主机性能。因此,能否精确地测量其外径尺寸,正确地进行外径尺寸分选成为保证活塞销质量的关键因素。 二、温度对尺寸精度的影响 由于活塞销外圆尺寸精度要求高,在不具备恒温加工条件下,就不能不考虑温度对加工精度的影响。为此我们做了活塞销及块规随温度变化的规律试验。选用4只活塞销,外径尺寸分别为24.PP30mm; 24.PP15mm; 24.PP05mm;24.PP05mm。块规长度为70mm。
First, the foreword Piston pin in the engine is connected to the piston and connecting rod, an important component of the transmission of power, with the piston pin hole with high precision and important parts, with the piston pin hole with high precision with the need of an appropriate gap , It can be guaranteed, will directly affect the host performance. Therefore, the precise measurement of its outer diameter size, the correct size of the outer diameter of piston pin to ensure the quality of the key factors. Second, the temperature on the dimensional accuracy As piston pin cylindrical size requirements of high precision, do not have the thermostat processing conditions, we can not but consider the temperature on the processing accuracy. To this end we made the piston pin and block rules with the temperature changes in the test. Selection of four piston pin, the outer diameter dimensions were 24. PP30mm; 24.PP15mm; 24.PP05mm; 24.PP05mm. Block length of 70mm.