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Design method of angle of oil hole in process of medium-frequency quenching of crankshaft

A design method and oil hole technology, applied in drilling/drilling equipment, workshop equipment, boring/drilling, etc., can solve the problems of scrapped crankshaft, oil hole cracks, etc.

Inactive Publication Date: 2017-08-18
JIANGSU WANLI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All the chamfering of the oil hole of the crankshaft puts forward quite high requirements. If it is slightly improper, cracks will appear at the oil hole and the crankshaft will be scrapped.

Method used

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  • Design method of angle of oil hole in process of medium-frequency quenching of crankshaft

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Embodiment Construction

[0018] For this reason, we change the processing position of the oil hole, that is, change the angle of the oil hole to make the hole wall thicker, and no cracking at the hole will occur during intermediate frequency quenching. The specific method is as follows:

[0019] 1) Put the crankshaft on the V-shaped iron on the marble workbench, mark the crankshaft with a height ruler with a knife edge, the position of the oil inlet hole of the connecting rod is 8mm on the center line of the connecting rod journal, and the oil outlet hole of the main shaft The position is 5mm below the centerline of the main shaft, and the position of the oil inlet and outlet holes is at the center of the journal opening, and try not to move along the axial direction;

[0020] 2) Place the marked crankshaft smoothly in the fixture of the oil hole processing machine tool, position and clamp it;

[0021] 3) Slowly and manually approach the drill bit to the crankshaft to see if the marked part of the cr...

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Abstract

The invention provides a design method of the angle of an oil hole in the process of medium-frequency quenching of a crankshaft. Particularly, the machining position of the oil hole is changed, namely, the angle of the oil hole is changed so that the hole wall of a hole opening can be thickened. The specific method comprises the following steps that a connecting rod oil inlet hole (3) is arranged in the center line of a connecting rod neck journal (4), and a main shaft oil outlet hole (2) is arranged below the center line of a main shaft (1); the crankshaft (5) marked with lines is stably placed in a clamp of an oil hole processing machine tool, located and clamped; a button is started, and the machining process is accomplished; if the dimension cannot meet the requirement of a drawing, adjustment continues; after the dimension passes inspection, normal production is conducted; and after machining of the connecting rod oil inlet hole (3) and the main shaft oil outlet hole (2) is accomplished, chamfering treatment is conducted on the oil hole. Due to the fact that the position of the oil hole is adjusted, the oil hole wall thickness of a chamfered portion is obviously increased, and the phenomenon that the hole opening cracks is not prone to happening in the process of medium-frequency quenching.

Description

technical field [0001] The invention relates to a method for designing the position and angle of an oil hole in a journal of a crankshaft, in particular to a method for designing the angle of an oil hole in an intermediate frequency quenched crankshaft. Background technique [0002] The crankshaft is one of the most important parts of the engine. During the installation process, the surface of the crankshaft journal cooperates with the bearing bush. In order to prevent the occurrence of dry friction between the journal and the bearing bush, which would lead to the phenomenon of pulling and holding the bush, when the engine is running, there must be a layer of oil film between the journal surface and the bearing bush to protect it, and the existence of the crankshaft oil hole plays a role. key role. [0003] The inclined oil hole is one of the important processes of crankshaft machining. It acts as a lubricating oil channel for lubrication. The oil in the crankcase enters th...

Claims

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Application Information

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IPC IPC(8): B23B41/00B25H7/04B23D79/00B23Q3/06
CPCB23B41/00B23D79/00B23Q3/06B23Q2703/105B25H7/04
Inventor 殷文元谢善忠蔡正青钱祥鑫
Owner JIANGSU WANLI MACHINERY
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