High-pressure plunger pump connecting rod processing process device

Abstract

The invention relates to the technical field of processing of mechanical parts and discloses a high-pressure plunger pump connecting rod processing process device. The high-pressure plunger pump connecting rod processing process device is characterized in that the connecting rod comprise a connecting rod big head and a connecting rod small head positioned at the two ends respectively; a big and small head connecting body is arranged between the connecting rod big head and the connecting rod small head; a plurality of bolt holes and at least one positioning pin hole are formed on the connectingrod big head; a weight-reducing hole stretching into the connecting rod is formed on the connecting rod big head; a copper sleeve mounting hole is formed on the connecting rod small head; and a copper sleeve is inserted in the copper sleeve mounting hole. The high-pressure plunger pump connecting rod processing process device has the following advantages and effects: the overall dimensions of theconnecting small head are roughly processed by linear cutting and a small head copper sleeve mounting hole is cut under the same standard; and an excircle of the connecting rod and an inner hole of the copper sleeve are subjected to finish machining in the same reference plane on the premise of guaranteeing that the outer surface of the copper sleeve is in the excircle of the connecting rod smallhead, so that the coaxiality of the excircle of the connecting rod small head, the outer wall of the copper sleeve and the inner hole of the copper sleeve is improved, and non-uniform thickness of the copper sleeve caused by finish machining on the inner hole of the copper sleeve is avoided.

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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