Fixture and method for compound machining of connecting rod center split connecting face and teeth of diesel engine

Abstract

The invention discloses a clamp and a method for combined machining of a connecting rod centre parting connecting surface hole tooth of a diesel engine. The clamp comprises a clamp body, a large end overlapping assembly, a supporting seat assembly, a large end gasket ring assembly, a small end overlapping assembly, a small end gasket ring assembly and a positioning seat assembly; the clamp is mounted on a machine tool work table with a horizontal machining centre; a connecting rod body and a connecting rod cover are clamped and adjusted at one time; when the connecting rod body and the connecting rod cover are clamped, the connecting rod body and the connecting rod cover are respectively and closely pressed against the lower positioning surface and the upper positioning surface of the positioning seat assembly, so that the centre line of the connecting rod body and the centre line of the connecting rod cover are dislocated for half a tooth; meanwhile, the connecting rod body and the connecting rod cover are tightly pressed against the side surface of the supporting seat assembly so as to cancel cutting force; then, combined machining of a connecting rod centre parting connecting surface, a connecting hole and a connecting tooth is completed through two rotary stations of the machine tool work table. The machining of all elements, such as the connecting rod centre parting connecting surface, the connecting hole and the connecting tooth, can be completed by clamping and adjusting at one time; the construction period is shortened; the efficiency and the accuracy are improved; the quality is ensured; the labour intensity is reduced.

Description

technical field [0001] The invention relates to a processing technology of a large diesel engine component, in particular to a clamp and a method for composite machining of connecting rods of connecting rods of a diesel engine through one-time clamping on a horizontal machining center, and belongs to the technical field of diesel engine manufacturing. Background technique [0002] The connecting rod, like the crankshaft, is the most critical moving part of the diesel engine. Its small end is connected to the piston assembly, and the large end is matched with the crank pin of the crankshaft to form a crank connecting rod mechanism. The function is to convert the reciprocating power of the piston in the cylinder into the crankshaft. The rotary torque of the power output. see figure 1 , the typical structure of the connecting rod C of the medium and high speed diesel engine is that it is divided into two parts: the connecting rod body C1 and the connecting rod cover C2 at the ...

AI Technical Summary

Problems solved by technology

[0006] 1. The processing elements such as holes and teeth on the split surface of the connecting rod must be clamped and adjusted multiple times on two machine tools and divided into three processes to complete the processing, resulting in complicated workpiece turnover, large auxiliary man-hours, long production cycle and low production efficiency

[0007] 2. The processing and adjustment accuracy of the holes and teeth on the split surface of the connecting rod is relatively high. Too many times of clamping and adjustment will inevitably lead to cumulative errors, so that the shape and position accuracy of the holes and teeth cannot be guaranteed.

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