Dimple-forming burnishing tool and dimple-forming burnishing method

Inactive Publication Date: 2013-08-22
SUGINO MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a tool and method for making small dents on a surface, particularly on the narrow portion of a groove. It is designed to be efficient and secure.

Problems solved by technology

However, when the surface treatment of forming dimples is applied to the work surface of a narrow portion such as the side surface of the groove portion of a compressor component, the problem has been proposed as follows.
That is, the WPC treatment requires shooting particles at every surface treatment, which raises machining cost, and is not efficient.
The laser-machining is difficult to be applied to the work surface of the narrow portion such as a side surface of the groove portion.
This causes difficulty in to forming dimples by secure contacting all of the rolling elements on the work surface.

Method used

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  • Dimple-forming burnishing tool and dimple-forming burnishing method
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  • Dimple-forming burnishing tool and dimple-forming burnishing method

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Embodiment Construction

[0037]Next, an embodiment according to the invention will be described with reference to the drawings. FIG. 1 shows a half-sectional view of a dimple-forming burnishing tool (hereafter, referred to as a burnishing tool) according to the embodiment of the invention. In FIG. 1, the upper side of the burnishing tool relative to the axis CL is shown by the sectional view, and the lower side thereof is shown by the side view. It is noted that the front direction F1 and the rear direction R1 of the burnishing tool are set for clear description, as shown in FIG. 1.

[0038]As shown in FIG. 1, the burnishing tool 1 includes: a mandrel 2 having a rear end side which is rotatably fitted to a processing machine (not shown in Figs.) such as a machining center or an NC milling machine; and a frame 4 which is fixed to the front end side of the mandrel from the outside and which holds balls 3 contacting the outer peripheral surface 23 on the mandrel 2.

[0039]The mandrel 2 is formed in a round bar-shap...

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Abstract

A burnishing tool includes a mandrel; and a frame fitted to the mandrel and holding balls contacting an outer peripheral surface on the mandrel. The outer peripheral surface has a contact surface with the balls. The contact surface is at a side of the outer peripheral surface which is closer to the work surface. The contact surface and the work surface have a distance therebetween in a direction normal to the work surface. A distance at a side of the mandrel closer to the processing machine and a distance at the opposite side of the mandrel have a distance difference therebetween. A diameter of the outer peripheral surface on the mandrel is set in such a way that the distance difference with the mandrel flexed during formation of the dimples becomes smaller than that before flexing of the mandrel.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2012-035752 filed on Feb. 22, 2012; the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a dimple-forming burnishing tool and a dimple-forming burnishing method for forming a dimple on a work surface by contacting a ball with the work surface.[0004]2. Description of Related Art[0005]There is a technique of forming fine dimples for keeping a lubricant on a sliding surface of a sliding member such as a bearing to reduce friction resistance of the sliding surface. The surface treatment for forming the dimples on a work surface such as the sliding surface has been known as a dimple-forming by a WPC treatment (fine-particle shot-peening), a dimple-forming by a laser-machining and the like.[0006]The dimple-forming by the WPC treatment is a sur...

Claims

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Application Information

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IPC IPC(8): B21D17/04
CPCB24B39/023B21D17/04B24B39/00
InventorFUTAMURA, MASARUKAWASUMI, KATSUYUKIMIYAUCHI, SHINYA
OwnerSUGINO MACHINE