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Keyway machining method of same-tangency-point eccentric shaft

A processing method and eccentric shaft technology, applied in metal processing equipment, manufacturing tools, details of milling machine equipment, etc., can solve problems such as difficulty in ensuring accuracy and making waste products, so as to improve the accuracy of measurement, facilitate measurement and processing, and avoid problems. The effect of skewed keyway

Inactive Publication Date: 2014-04-23
ZHENJIANG HENGYU TRANSMISSION MACHINERY
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Problems solved by technology

[0002] In industrial production, milling a keyway on the side of an eccentric shaft casting with a cotangent point is a very difficult process to master. Small eccentric cylinders, and the circular edges on the connecting surfaces of the two cylinders have the same point of tangency; and if the eccentric cylinder has been cut out on the cylindrical casting, you want to mill it out on the side of the cylindrical casting For equivalent keyways, it is necessary to find the point of tangency between the two circles. By connecting the centers of the two circles through the tangent point, several equivalent keyways can be determined. However, there is no mature method to find the point of tangency between the two circles. The general method is to Turn the point into a short line, draw a short line close to the tangent point by visual observation, use the short line as an auxiliary to draw a vertical center line, the center line will deviate from the center of the two circles, and then determine the keyway, this method is very difficult to ensure accuracy, often made waste product

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  • Keyway machining method of same-tangency-point eccentric shaft

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Embodiment Construction

[0017] The preferred technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] Such as figure 1 As shown, a kind of keyway processing method of the eccentric shaft at the same tangent point of the present invention comprises the following steps:

[0019] A. Draw a diameter line L on the end surface of the cylindrical casting; find three points on the circle, connect them into two line segments, and make the perpendicular bisectors of the two line segments respectively. The intersection point is the center of the circle, and draw the diameter arbitrarily through the center of the circle Line L.

[0020] B. Draw an isosceles triangle reference piece 1 whose base is perpendicular to the diameter line L on the end surface of the cylindrical casting. The center of the end surface of the cylindrical casting is located in the triangle reference piece 1. ; Define α as 80°, then the apex angle of the isoscel...

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Abstract

The invention discloses a keyway machining method of a same-tangency-point eccentric shaft. A keyway position is confirmed based on a reference part formed by performing end face milling on a cylindrical casting part, a keyway is milled and then an eccentric circle is cut. Compared with the prior art, the keyway machining method can enable the keyway to be accurately positioned and cut, deviation caused by the fact that the eccentric circle is first cut and then the keyway is positioned is avoided, the keyway milling accuracy is greatly improved, workpiece waste is avoided, the time is saved, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a method for processing a keyway, in particular to a method for processing a keyway for an eccentric shaft at the same point of tangency. Background technique [0002] In industrial production, milling a keyway on the side of an eccentric shaft casting with a cotangent point is a very difficult process to master. Small eccentric cylinders, and the circular edges on the connecting surfaces of the two cylinders have the same point of tangency; and if the eccentric cylinder has been cut out on the cylindrical casting, you want to mill it out on the side of the cylindrical casting For equivalent keyways, it is necessary to find the point of tangency between the two circles. By connecting the centers of the two circles through the tangent point, several equivalent keyways can be determined. However, there is no mature method to find the point of tangency between the two circles. The general method is to Turn the point into a short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/02
CPCB23C3/30
Inventor 陈林张林威
Owner ZHENJIANG HENGYU TRANSMISSION MACHINERY
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