Method for making and machining eccentric combination pin
A processing method and eccentric technology, applied in the field of mechanical parts processing, can solve the problems that the pins cannot cooperate with precision, cannot bear the radial load of large-scale unit bearings for a long time, and cannot accurately measure the eccentric value of the pin hole, etc., so as to improve the service life, The effect of simple method and high processing precision
Active Publication Date: 2013-04-24
TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD
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Problems solved by technology
At present, the preparation and processing method of the pin is mainly to measure the pin hole and then distribute the pin, but the general measuring tool cannot accurately measure the eccentric value of the pin hole, so the prepared pin cannot meet the required matching accuracy with the pin hole, and cannot withstand large-scale Unit bearing radial load
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[0009] Such as figure 1 , 2 Shown, a preparation and processing method of eccentric combination pin. First measure the diameter of the small end at the bottom of the pin hole, then use the lathe to finish the small end 1 of the eccentric combination pin to the required size, use the lathe to rough turn the eccentric combination pin large end 2, leave a machining allowance of 30mm 3, and perform ultrasonic flaw detection after rough machining. Measure the eccentric value of the pin hole with a measuring tool for measuring the eccentric value of the eccentric combination pin. The method is: insert the small end 5 of the measuring plug gauge into the bottom of the pin hole, loosen the nut 6, and adjust the specific position of the large end 4 of the measuring plug gauge so that It is consistent with the eccentricity of the pin hole, then tighten the stud 7 and the nut 6, take out the measuring plug gauge, and then measure the eccentric value of the plug gauge. Finally, use the ...
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The invention provides a method for making and machining an eccentric combination pin. The method comprises the following steps of: measuring the diameter of a small end of the bottom part of a pin hole; finely turning the small end of the eccentric combination pin to obtain a required size by using a lathe; roughly turning a large end of the combination pin by using the lathe, wherein machining allowance of 30 millimeters is kept; performing ultrasonic flaw detection after rough machining; measuring the eccentric value of the pin hole by using a measurement plug gauge for measuring the eccentric value of the combination pin; and finely turning the large end of the combination pin to obtain the required size on the lathe by using a four-jaw chuck according to the measured eccentric value.
Description
technical field [0001] The invention belongs to the field of machining of mechanical parts, and in particular relates to a preparation and processing method of eccentric combination pins. Background technique [0002] Due to the advancement of technology, the size of hydro-generators is getting bigger and bigger, the weight is getting heavier, and the load is getting higher and higher. For example, the radial load of the bearing of a large-scale tubular unit reaches more than 200t, and these radial loads are basically driven by pins. To bear, this puts forward higher requirements for the configuration and processing of the pin. At present, the preparation and processing method of the pin is mainly to measure the pin hole and then distribute the pin, but the general measuring tool cannot accurately measure the eccentric value of the pin hole, so the configured pin cannot meet the required matching accuracy with the pin hole, and cannot withstand large-scale Unit bearing radi...
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IPC IPC(8): B23B1/00
Inventor 张磊
Owner TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD