Crankshaft neck surface waviness grinding tool and using method thereof

A surface waviness and crankshaft journal technology, which is applied in the field of crankshaft journal surface waviness grinding tools, can solve the problems of affecting the service life of the engine, engine performance degradation, and waviness out of tolerance, so as to achieve low cost of use and avoid unnecessary loss, significant effect

Pending Publication Date: 2019-11-12
桂林福达曲轴有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Crankshaft neck surface waviness grinding tool and using method thereof
  • Crankshaft neck surface waviness grinding tool and using method thereof
  • Crankshaft neck surface waviness grinding tool and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as Figure 1-5 As shown, a crankshaft journal surface waviness grinding tool is mainly composed of a handle 1, a lock nut 2 and a grinding body 3; the grinding body 3 is 1 / 3 arc long and its width is smaller than the length of the ground journal 0.1mm fan-shaped ring; a threaded hole 4 is provided at the top middle of the grinding body 3, and the arc surface at the bottom of the grinding body 3 is the grinding working surface, and the two sides are respectively provided with relief grooves 5; The lower end of the handle 1 is provided with an external thread, and the size of the external thread matches the threaded hole 4 of the grinding body 3; the lock nut 2 matches the external thread of the handle 1; the lower end of the handle 1 passes through the After locking the nut 2, it is fixed together with the threaded hole 4 of the grinding body 3 by threaded connection. The handle 1 is a T-shaped handle. The transverse bar of the T-shaped handle is a round bar with ...

Embodiment 2

[0027] A crankshaft journal surface waviness grinding tool, mainly composed of a handle 1, a lock nut 2 and a grinding body 3; the grinding body 3 is 1 / 2 arc long and 0.1mm smaller in width than the length of the ground journal Fan-shaped ring; a threaded hole 4 is provided at the top middle of the grinding body 3, and the arc surface at the bottom of the grinding body 3 is a grinding working surface, and both sides are respectively provided with relief grooves 5; the handle 1 The lower end is provided with an external thread, and the size of the external thread matches the threaded hole 4 of the grinding body 3; the lock nut 2 matches the external thread of the handle 1; the lower end of the handle 1 passes through the lock nut After 2, it is fixed together with the threaded hole 4 of the grinding body 3 by threaded connection. The difference between the inner diameter of the grinding body 3 and the diameter of the journal to be ground is within about 0.01 mm, and the smoothn...

Embodiment 3

[0029] A crankshaft journal surface waviness grinding tool, mainly composed of a handle 1, a lock nut 2 and a grinding body 3; the grinding body 3 is 1 / 2 arc long and 0.1mm smaller in width than the length of the ground journal Fan-shaped ring; a threaded hole 4 is provided at the top middle of the grinding body 3, and the arc surface at the bottom of the grinding body 3 is a grinding working surface, and both sides are respectively provided with relief grooves 5; the handle 1 The lower end is provided with an external thread, and the size of the external thread matches the threaded hole 4 of the grinding body 3; the lock nut 2 matches the external thread of the handle 1; the lower end of the handle 1 passes through the lock nut After 2, it is fixed together with the threaded hole 4 of the grinding body 3 by threaded connection. The difference between the inner diameter of the grinding body 3 and the diameter of the journal to be ground is within 0.02 mm, and the smoothness of...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B5/42B24B5/35B24B1/00
CPCB24B1/00B24B5/35B24B5/42
Inventor 黄学文夏志成郑杨李鸿飞
Owner 桂林福达曲轴有限公司
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