Elastic positioning pin without gas damp

Abstract

The invention relates to an elastic locating pin without gas damping. A seat body is fixedly arranged on a clamping member; a slide opening is formed through the inside of the seat body; a locating pin body, the top end of which extends out of the seat body, is connected in a sliding manner in the slide opening; a limit bulge is arranged on the hole wall of the slide opening; correspondingly, a limit convex ring matched with the limit bulge is arranged on the outer wall at the bottom end of the locating pin; an adjusting nut is in bolt connection with the bottom end part of the slide opening to form a spring cavity between the adjusting nut and the locating pin; an offsetting spring is arranged in the spring cavity; the top end of the offsetting spring supports the bottom end face of the locating pin; the bottom end part of the offsetting spring supports the top end face of the adjusting nut; a mounting hole that communicates with the atmosphere is formed on the clamping member; the bottom end of the seat body is plugged in the mounting hole; a through-hole that leads the mounting hole to communicate with the spring cavity is formed on the adjusting nut. The spring cavity communicates with the external atmosphere, so that no gas damping exists when the locating pin moves up and down, and the up and down movement of the locating pin is flexible.

Description

technical field [0001] The invention relates to a positioning pin, in particular to a non-gas damping elastic positioning pin. Background technique [0002] Fixture positioning is divided into fine positioning and rough positioning. Fine positioning is generally used for positioning of workpiece finishing holes, and rough positioning is generally used for positioning of workpiece rough holes. Coarse positioning uses the elastic positioning pin, which uses the taper of the positioning pin to eliminate the dimensional tolerance of the blank hole of the workpiece. At present, the general elastic positioning pin forms a semi-sealed cavity between the spring cavity and the adjusting screw. Air, when the positioning pin moves up and down, the volume of the cavity changes, and the gas in the cavity instantly forms high pressure or negative pressure, which becomes gas damping and affects the flexible movement of the positioning pin. When negative pressure is formed, cutting fluid an...

AI Technical Summary

Problems solved by technology

Coarse positioning uses the elastic positioning pin, which uses the taper of the positioning pin to eliminate the dimensional tolerance of the blank hole of the workpiece. At present, the general elastic positioning pin forms a semi-sealed cavity between the spring cavity and the adjusting screw. Air, when the positioning pin moves up and down, the volume of the cavity changes, and the gas in the cavity instantly forms high pressure or negative pressure, which becomes gas damping and affects the flexible movement of the positioning pin. When negative pressure is formed, cutting fluid and dirt will be attracted to enter Sliding hole, which affects the accuracy of positioning

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