A high-pressure plunger pump connecting rod processing device

Abstract

The invention relates to the technical field of mechanical parts processing, and discloses a high-pressure plunger pump connecting rod processing technology. There is a connecting body between the big and small ends. The big end of the connecting rod is provided with a plurality of bolt holes and at least one positioning pin hole. The large end of the connecting rod is provided with a weight-reducing hole extending into the connecting rod. The sleeve installation hole, the copper sleeve installation hole is plugged with a copper sleeve. The present invention has the following advantages and effects: Utilize wire cutting to roughly machine the external dimensions of the small head of the connecting rod and cut the installation hole of the small head copper sleeve on the same basis, and at the same time ensure that the outer surface of the copper sleeve is in the outer circle of the small head of the connecting rod. The outer circle of the connecting rod and the inner hole of the copper sleeve are finished on the same reference plane, which improves the coaxiality of the outer circle of the small head of the connecting rod, the outer wall of the copper sleeve and the inner hole of the copper sleeve, and also avoids the inner hole of the copper sleeve. The thickness of the copper sleeve is uneven when finishing.

Description

technical field [0001] The invention relates to the technical field of mechanical parts processing, in particular to a processing device for a connecting rod of a high-pressure plunger pump. Background technique [0002] At present, the processing technology of connecting rod generally adopts die forging--rough machining of general car--drilling machine to drill small head through hole and middle lightening hole--boring machine to bore the shape of the big head end face and rough boring the two ends of the small head--heat treatment--fine boring big head End face, small head end face, small head copper sleeve hole--drilling end face bolt connection holes and positioning pin holes--cold-set copper sleeve--fine boring copper sleeve--cutting the shape of small head by wire cutting--finishing the outer circle of small head --High-frequency quenching small head outer circle--handover inspection--finished product storage. The main problems of this processing technology are: the s...

AI Technical Summary

Problems solved by technology

The main problems of this processing technology are: the small end of the connecting rod on the grinding machine is positioned and clamped by the pin, and there is a gap between the pin and the hole of the copper sleeve, so it is impossible to ensure the same alignment between the inner hole of the copper sleeve and the outer end surface of the small end. Shaft and dimensional accuracy requirements

Therefore, due to the development of processing technology conditions, the current domestic connecting rods generally have insufficient processing accuracy, which seriously affects the assembly quality of the whole pump.

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