Crankshaft neck surface waviness grinding tool and using method thereof

Abstract

The invention discloses a crankshaft neck surface waviness grinding tool and a using method thereof. The grinding tool is mainly composed of a handle (1), a locking unit (2) and a grinding body (3). The grinding body (3) is a fan-shaped circular ring of the 1 / 3-1 / 2 arc length, and the width of the fan-shaped circular ring is 0.1 mm smaller than the length of a ground crankshaft neck. A thread hole(4) is formed in the middle position of the top of the grinding body (3). The bottom arc surface of the grinding body (3) is a grinding work surface. Cutter withdrawal grooves (5) are formed in the two sides of the bottom arc surface correspondingly. An outer thread is arranged at the lower end of the handle (1). The specification size of the outer thread is matched with the thread hole (4) of the grinding body (3). The lower end of the handle (1) penetrates through the locking nut (2), and then is fixed together with the thread hole (4) of the grinding body (3) in a thread connecting manner.The tool is simple in structure, high in practicality and high in flexibility, the effect of removing or relieving the circumferential waviness of the crankshaft neck is remarkable, the rework technology is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of engine crankshaft processing, and in particular relates to a crankshaft journal surface waviness grinding tool and a use method thereof. Background technique [0002] The crankshaft is one of the core parts of the engine. In terms of design and processing, the requirements for the main shaft and connecting rod journal are very strict. In addition to the journal diameter tolerance, roundness and cylindricity, there are also requirements for waviness. If these requirements exceed the If it is poor, it will directly lead to the decline of engine performance, and serious direct occurrence of lava will affect the service life of the engine. However, in the process of crankshaft machining, due to changes in equipment conditions and large machining allowances, etc., the circumferential surface of the machined journal will have excessive waviness; crankshafts with such excessive waviness are directly scrapped in ...

AI Technical Summary

Problems solved by technology

[0002] The crankshaft is one of the core parts of the engine. In terms of design and processing, the requirements for the main shaft and connecting rod journal are very strict. In addition to the journal diameter tolerance, roundness and cylindricity, there are also requirements for waviness. If these requirements exceed the If it is poor, it will directly lead to the decline of engine performance, and serious direct occurrence of lava will affect the service life of the engine

However, in the process of crankshaft machining, due to changes in equipment conditions and large machining allowances, etc., the circumferential surface of the machined journal will have excessive waviness; crankshafts with such excessive waviness are directly scrapped in order not to affect the performance of the engine. There is no better way to deal with it; however, the loss is too great for a crankshaft worth tens of thousands of yuan

According to the inventor's market research and literature review, there is no grinding tool specially used for grinding crankshaft journal surface waviness in the current market

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