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.