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Raceway groove machining method, bearing, ball screw device, machine, and vehicle production method

A technology of ball screw and raceway groove, which is applied in the fields of ball screw device, manufacturing bearing, machine and vehicle to achieve the effect of reducing processing cost and manufacturing cost

Inactive Publication Date: 2019-05-24
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the viewpoint of suppressing manufacturing cost, the method for manufacturing the ball nut 3 has room for improvement

Method used

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  • Raceway groove machining method, bearing, ball screw device, machine, and vehicle production method
  • Raceway groove machining method, bearing, ball screw device, machine, and vehicle production method
  • Raceway groove machining method, bearing, ball screw device, machine, and vehicle production method

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no. 1 approach

[0040] will refer to Figure 1 to Figure 4 A first embodiment of the present invention is described. in addition, figure 1 and figure 2 A state in which a part (one lead portion) of the ball nut 3 targeted by the present embodiment is taken out is shown. similar to Figure 7 and Figure 8 In the conventional structure shown, the ball screw device 1 includes a ball screw shaft 2 and a plurality of balls 4 , 4 in addition to a ball nut 3 . The ball screw shaft 2 is formed of an iron-based metallic steel material such as carbon steel in a circular section and a linear rod shape. On the outer peripheral surface of the ball screw shaft 2, the inner diameter side having a partially circular arc-shaped cross section is provided at equal intervals (same lead) in the axial direction in a spiral shape and in a continuous state on a plurality of circumferences. Ball screw groove 5.

[0041] The ball nut 3 is formed by fitting (press-fitting) and fixing a substantially elliptical ...

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Abstract

Provided is a raceway groove machining method in which machined-side raceway grooves for roll-contacting rolling elements are formed in the circumferential direction in a machined surface, which is the cylindrical circumferential surface of a machined object, wherein: rolling elements for machining are rollably disposed between a tool-side circumferential surface, which is a cylindrical surface, of a machining tool and is opposed to the machined surface, and machined-side raceway grooves; the machining tool is rotated relative to the machined object; and the machined-side raceway grooves are burnished.

Description

technical field [0001] The invention relates to an improvement in a method for machining a raceway groove on a surface to be machined of a workpiece, which is configured for rolling contact with rolling elements, said surface to be machined being a cylindrical peripheral surface , the workpiece is, for example, a ball nut or a ball screw shaft constituting a ball screw device and an outer ring or an inner ring constituting a ball bearing. The invention also relates to methods for manufacturing bearings, ball screw arrangements, machines and vehicles. Background technique [0002] For example, the ball screw device described in Patent Document 1 is incorporated into various mechanical devices (for example, machine tools) including movable parts that move linearly. As a so-called piece type ball screw device, Figure 7 and Figure 8 An example of the conventional structure described in Patent Document 1 is shown. The ball screw device 1 includes a ball screw shaft 2 , a bal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B39/02B23G1/22B23P15/00F16H25/24
CPCB24B19/022F16C2223/30B23P9/04B23P15/003F16C2220/44F16C33/585F16H25/24F16C33/64B24B39/023B24B19/06F16H2025/2481F16H25/2204B23G1/22B24B39/02
Inventor 山本昌人小山宽
Owner NSK LTD