Method for polishing connecting rod arc face

Abstract

The invention provides a method for polishing a connecting rod arc face. The method comprises the following steps of S1, fixing a connecting rod workpiece, placing the connecting rod arc face to be polished upwards, and enabling the included angle of the connecting rod arc face to be larger than 180 degrees; S2, lifting the positions of polishing belts, and positioning the polishing belts to the connecting rod arc face; S3, at the transition position of the connecting rod arc face and a rod part of the connecting rod, clamping the polishing belts on two sides of the connecting rod arc face, and enabling the polishing belts to be tightly attached to the whole arc face, to be polished, of the connecting rod workpiece, wherein the polishing belts and the end points of the connecting rod workpiece arc face have a tangent relation, and it is ensured that the polishing belts and the connecting rod workpiece arc face are consistent in stress; and S4, operating the polishing belts, and polishing the connecting rod arc face. According to the method, polishing of the connecting rod arc outer surface with the included angle exceeding 180 degrees can be achieved, the machining efficiency is high, the polishing precision is high, time and labor are saved, the application range is wide, and the polishing of the wider arc face can be achieved.

Description

[0001] This application is a divisional application of "A Method and Device for Polishing the Arc Surface of a Connecting Rod". The filing date is: 2019.8.19, and the application number is: 201910762841.9. technical field [0002] The invention relates to a method for polishing the circular arc surface of a connecting rod, which belongs to the technical field of mechanical processing. Background technique [0003] The connecting rod is a part that connects the piston and the crankshaft. Its function is to convert the reciprocating motion of the piston into the rotational motion of the crankshaft, and transmit the force acting on the piston to the crankshaft to output power. The stress situation of the connecting rod in the work is relatively complicated, which is not only affected by the alternating tensile stress and compressive stress, but also subjected to the bending stress. Because of the complex stress situation of the connecting rod, there are strict requirements for ...

AI Technical Summary

Problems solved by technology

The existing polishing method is to add fixtures on the milling machine, clamp the connecting rod on the milling machine, and perform polishing by rotating the workpiece of the connecting rod. Because the product itself is relatively heavy, and the rotation and polishing are controlled manually, the operation is time-consuming Laborious, and the polishing accuracy is difficult to guarantee

Moreover, the surface to be polished of this special connecting rod workpiece is not a complete cylindrical surface, but an arc surface with an included angle of about 200°. Since the included angle exceeds 180°, some of the arc surface to be polished is located at the big end of the connecting rod. Below the center line, it is more difficult to grind and polish

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