Segmented crankshaft machining process

Abstract

The invention discloses a crankshaft machining process, in particular relates to a segmented crankshaft machining process and belongs to the technical field of processing and manufacturing of crankshafts. The segmented crankshaft comprises a front section, a middle section and a rear section, wherein the front section, the middle section and the rear section are connected and assembled through the shaft neck conical degree of each section of connecting rod neck and conical holes matched with connecting arms; and an integrated crankshaft connecting rod assembly is obtained through the steps of performing rough machining on the whole body, sawing off, performing semi-finishing segmentally, assembling and performing finish machining on the whole body. Compared with the process of independently blanking and machining segmentally, the integrated rough machining process can avoid reduced machining precision caused by inconsistent positioning standard in the independent machining for each section to the maximum degree. The phase angle of the crankshaft can be controlled easily during machining, so that a foundation is laid for precise assembling and connection of each section. The machining process adopts common machining equipment in the machining process, so that the requirement on the machining equipment is effectively reduced and the machining efficiency is improved.

Description

Technical field [0001] The invention involves a crankshaft processing process, especially a segmented crankshaft processing process, which belongs to the field of crankshaft processing and manufacturing technology. Background technique [0002] The crankshaft is an important part of the engine. Generally, the crankshaft consists of the overall structure of the crankshaft head, the splash, the fan -shaped plate, and the connecting rod neck. The conventional crankshaft processing is the overall processing, from rough processing to semi -precision processing, and then refined processingThese conventional crankshafts are connected to the neck of the crankshaft by the corresponding assembly parts (such as connecting rods). This type of crankshaft structure is not special. There is no weight loss hole on the inner neck on the inner side of the fan -shaped plate.It can be processed with traditional craftsmanship. [0003] There is also a segmented crankshaft structure, which is differen...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned segmented crankshaft has high requirements on the machining accuracy of each segment and the matching degree of the overall assembly. The general processing adopts the process of rough machining to finish machining of each segment, that is, the front, middle and rear three segments of the crankshaft are As a separate component, three blanks are used for independent blanking until processed into the final product of each section, and then the final assembly of each section. In this processing technology, each section uses different reference planes for rough and fine machining. Positioning, it is easy to cause low precision after assembly of each section, which affects the overall performance of the crankshaft, and this processing method is inefficient