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Method for grinding installation angle of grinding wheel through inner roller path of ball nut and designing accurate profile

A technology for ball nuts and design methods, which is applied in the direction of grinding devices, grinding/polishing equipment, metal processing equipment, etc., and can solve the problem of affecting the machining quality and maximum length of machinable nuts, the non-normal truncation of ball nuts, and overcutting And other issues

Inactive Publication Date: 2010-06-02
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using the traditional method to process the raceway of the ball nut, with the increase of the helix angle, there will be overcutting during the grinding process, resulting in the normal truncation of the ball nut obtained by grinding is not a perfect double arc, This directly affects the processing quality and maximum length of machinable nuts

Method used

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  • Method for grinding installation angle of grinding wheel through inner roller path of ball nut and designing accurate profile
  • Method for grinding installation angle of grinding wheel through inner roller path of ball nut and designing accurate profile
  • Method for grinding installation angle of grinding wheel through inner roller path of ball nut and designing accurate profile

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Embodiment Construction

[0074] The present invention will be further described below in conjunction with drawings and embodiments.

[0075] Known ball nut raceway normal sectional parameters: e--the eccentricity of the two arcs of the raceway; R--the radius of the raceway arc; h--the distance from the center of the raceway arc to the center of the ball; d -- Ball nut inner diameter; d m -- Ball center track diameter. Other related parameters are also known: P--ball nut lead; L--ball nut axial length; c s -- screw groove depth; d s -- diameter of grinding wheel; d q -- Diameter of grinding rod.

[0076] 1) Calculate the center distance

[0077] see figure 1 , when the double-arc section of a ball nut raceway and the length of the nut are given, and the required grinding wheel diameter d is determined according to the nut processing technology s and rod diameter d q Finally, calculate the center distance A between the grinding wheel and the nut. Calculate the center distance A between the grin...

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Abstract

The invention discloses a method for grinding an installation angle of a grinding wheel through an inner roller path of a ball nut and designing an accurate profile, comprising the following steps of: giving the cross section of the roller path and the length of the roller path of the ball nut, as well as the diameter of a grinding wheel and the diameter of a grinding rod, and calculating a center distance between the grinding wheel and an axial line of the nut. Because of the geometrical position relation among the grinding wheel, the grinding rod and the ball nut, a constraint equation exists between the installation angle of the grinding wheel and geometrical parameters, and the constraint equation is solved to obtain the installation angle of the grinding wheel which is not collided in grinding. A space contact line is formed between a rotary surface of the grinding wheel and an interior screw roller path surface of the processed ball nut; according to double circular arc cross section parameters and the installation angle of the grinding wheel, a roller path curve equation is established according to the method of the roller path of the ball screw; and a series of contact points between the grinding wheel and the roller path surface are solved to obtain a profile curve of the grinding wheel, and the profile curve of the rotated rotate around the axial line of the grinding wheel to obtain the grinding wheel profile. The invention can avoid the phenomenon of collision and undercutting in the grinding process of the ball screw cap, the grinding wheel profile is simple to calculate, the installation angle of the grinding wheel is designed according to the technique, and the grinding profile is correspondingly finished.

Description

technical field [0001] The invention relates to a method for designing an installation angle and a precise profile of a ball nut inner raceway grinding wheel, and belongs to the field of mechanical design and processing. Background technique [0002] The ball screw pair has the characteristics of high positioning accuracy, high transmission efficiency, good synchronization performance, and long service life. It is widely used in CNC machine tools, precision machinery, high-precision measuring instruments, and automatic production lines. As the key component of the ball screw pair transmission, the ball nut determines the operating characteristics of the ball screw pair to a large extent. In most ball nuts, the normal section of the inner raceway of the nut helix is ​​spliced ​​by two arcs. The last process of machining the inner raceway of the ball nut is generally formed by grinding. The more common method is to make the angle between the grinding wheel shaft and the nut a...

Claims

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Application Information

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IPC IPC(8): B24D18/00
Inventor 李凌丰
Owner ZHEJIANG UNIV
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