Manufacturing method for diesel engine exhaust valve upper seat

Abstract

The invention discloses a manufacturing method for a diesel engine exhaust valve upper seat. The manufacturing method comprises the steps of processing a center hole after workblank polishing; drawing every horizontal curve, every round line and every lug processing line; processing inner holes at one end with a small diameter after correction; milling every excircle lug; enabling the inner holes at the end with the small diameter to be located through cylinder ejector pins, adjusting tooling screws to be aligned with the round lines at one end with a large diameter, first enabling a cutter retracting groove hole to undergo rough turning to be smooth, and then using a dill and a forming drill to process the inner holes and a cutter retracting groove; performing lineation and adjustment on excircles at one end with the large diameter; processing a process screw hole; performing high-pressure pumping pressure and low-pressure pumping pressure on a workpiece; processing small holes; performing finish machining on every inner hole and every excircle after pouring fusible alloy; processing locating pins; processing every hole on the side; performing deburring, and honing the inner holes; cleaning parts, and performing rust prevention treatment and inspection. The manufacturing method can effectively improve product processing quality and efficiency.

Description

technical field [0001] The invention relates to a manufacturing method of a diesel engine part, in particular to a manufacturing method of an upper seat of an exhaust valve of a diesel engine. Background technique [0002] The upper seat part of the traditional diesel engine exhaust valve is composed of two parts, the upper casing and the casing, and is connected by the piston guide sleeve. Since it is two parts, it is relatively simple to manufacture separately, but the relative position of the two parts is not easy to guarantee, so the use of The integral upper seat is replaced, but the integral upper seat product has been manufactured by many companies at home and abroad for more than a year, but all ended in failure. Contents of the invention [0003] In order to make up for the above deficiencies, the present invention provides a method for manufacturing the upper seat of the diesel engine exhaust valve. The manufacturing method can accurately process the integral upp...

AI Technical Summary

Problems solved by technology

[0002] The upper seat part of the traditional diesel engine exhaust valve is composed of two parts, the upper casing and the casing, and is connected by the piston guide sleeve. Since it is two parts, it is relatively simple to manufacture separately, but the relative position of the two parts is not easy to guarantee, so the use of The integral upper seat was replaced, but the integral upper seat product was manufactured by many companies at home and abroad for more than a year, but all ended in failure

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