Positioning tool for valve body machining and positioning method thereof

Abstract

The invention relates to a positioning tool for valve body machining and a positioning method thereof. A first positioning boss and a second positioning boss are pre-cast on the two sides of a valve body correspondingly, wherein the positioning tool comprises a tool bottom plate, a first positioning base, a second positioning base, a third positioning base and a fourth positioning base; the firstpositioning base, the second positioning base, the third positioning base and the fourth positioning base are installed on the tool bottom plate; an adjustable supporting column is installed on the first positioning base; a first fixed supporting platform is arranged on the second positioning base; the adjustable supporting column and the first fixed supporting platform are used for supporting thetwo first positioning bosses correspondingly; a floating supporting column is installed on the third positioning base; a second fixed supporting platform is installed on the fourth positioning base;and when the valve body is positioned, the floating supporting column and a positioning pin are used for being inserted into positioning inner groove holes in the bottom faces of the two second positioning bosses correspondingly. According to the positioning tool, the valve body is positioned through two fixed supports, one adjustable support and one floating support, operation is convenient, andthe positioning precision is high.

Description

technical field [0001] The invention relates to the technical field of machining positioning, in particular to a positioning tool for valve body machining and a positioning method thereof. Background technique [0002] The valve body of the oil pipeline transportation control valve needs to be finished in the horizontal machining center after being cast and formed. Therefore, it is necessary to have a special positioning tool to clamp the valve body on the horizontal machining center for finishing. It is usually an irregular curved surface, so the positioning method of four-side push is commonly used to position the valve body at present. The extrusion positioning method realizes the positioning of the valve body. This positioning method is easy to deform the valve body due to the clamping stress, and the positioning operation is troublesome and imprecise. Therefore, it is necessary to design a convenient and accurate positioning tool for valve body machining. Contents of...

AI Technical Summary

Problems solved by technology

[0002] The valve body of the oil pipeline transportation control valve needs to be finished in the horizontal machining center after being cast and formed. Therefore, it is necessary to have a special positioning tool to clamp the valve body on the horizontal machining center for finishing. It is usually an irregular curved surface, so the positioning method of four-side push is commonly used to position the valve body at present. The squeeze positioning method realizes the positioning of the valve body. This positioning method is easy to cause the valve body to be deformed by the clamping stress, and the positioning operation is troublesome and imprecise.

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