Machining Method of Drive Gear Hole System for Medium Speed ​​Diesel Engine Frame

Abstract

The invention discloses a medium-speed diesel engine frame transmission gear hole system machining method. The method comprises the following steps that (1) the bottom face of a diesel engine frame ismade to face upwards, and all gears of main bearing holes are machined through a first special accessory; (2) the top face of the diesel engine frame is made to face upwards, and all gears of oil injection camshaft holes are machined through a second special accessory; (3) all gears of air exhaust cam shaft holes are machined through the second special accessory; (4) actual position coordinates of the oil injection camshaft holes and the air exhaust cam shaft holes are found through a third special accessory, the coordinate value of a transition gear is worked out, and a transition gear holeis machined through the third special accessory; and (5) the transition gear hole and the main bearing holes serve as the criterion, the coordinate value of an intermediate gear hole is worked out, and the intermediate gear hole is machined through the third special accessory. According to the medium-speed diesel engine frame transmission gear hole system machining method, the auxiliary time is short, the working efficiency is high, the labor intensity is low, in addition, the accumulative error of clamping and aligning is small, the machining error is small, the positioning dimension precision between the holes is ensured, and accordingly, the product machining quality is ensured.

Description

technical field [0001] The invention relates to a numerical control machining method for a medium-speed diesel engine frame, in particular to a machining method for a transmission gear hole system on a medium-speed diesel engine frame, and belongs to the technical field of numerical control machining. Background technique [0002] The processing of transmission gear hole system of marine medium-speed diesel engine frame is one of the key points and difficulties in frame processing. The transmission gear hole system is mainly used to install the transmission gear set. The crankshaft drives the transmission gear set. The transmission gear set drives the exhaust camshaft and the fuel injection camshaft to work. The backlash of the transmission gear set is different from that of the crankshaft gear and the camshaft gear. The positioning dimensions of each hole are related to each other, so the position and dimension accuracy of the transmission gear hole system is very high, whi...

AI Technical Summary

Problems solved by technology

The traditional transmission gear hole system is processed by a CNC horizontal boring and milling machine. During processing, multiple clamping and positioning are required, and multiple stations need to find out the benchmarks several times to complete. Not only the auxiliary time is long, the work efficiency is low, and the labor intensity is high. Moreover, the accumulative errors of clamping and alignment are large, and the errors generated in the processing process often cannot guarantee the positioning and dimensional accuracy of each hole, and the processing quality of the product is extremely unstable.

Images