Selecting method of primary positioning reference of engine connecting rod
An engine connecting rod and preliminary positioning technology, applied in the hydraulic field, can solve problems such as low work efficiency, leakage of hydraulic technology, heavy equipment weight, etc., and achieve the effects of improving machine motion accuracy, improving operation controllability, and reducing labor intensity
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[0011] The method for selecting the preliminary positioning datum of the engine connecting rod described in the embodiment of the present invention, its main steps include:
[0012] (1) Firstly, select the first positioning datum of the upper and lower ends of the head hole, and select the small head hole and the outer side as the second and third positioning datums;
[0013] (2) Carry out rough grinding of the upper and lower ends, and use the method of mutual reference for processing. At the same time, when drilling and rough boring small head holes, select the end face and the outer contour of the small head as the reference plane;
[0014] ⑶ In the finishing operation, the processing is carried out in a uniform manner, and the small head hole is processed with the end face of the large and small head hole and the outer surface of the big head as the unified fine reference, and the upper and lower end faces are ground with itself as the fine reference;
[0015] ⑷ Select the...
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