Positioning device for workbench

Abstract

The invention discloses a positioning device for a workbench. The positioning device comprises a plurality of positioning blocks arranged between a workbench component and a workbench base, wherein through hole cavities are formed in the positioning blocks; pistons are arranged in the through hole cavities; the lower end of each piston is supported on the surface of the workbench base up and down in a movable mode by an elastic component; air detection through holes are formed on one side in the through hole cavities; air detection channels are formed in the pistons; air detection interfaces are formed on surfaces of the tops of the pistons; step structures are arranged inside the through hole cavities; bulged structures are arranged at bottoms of the pistons; when the bulged structures at the bottoms of the pistons are pressed against the step structures arranged inside the through hole cavities, the top ends of the pistons are bulged to a certain distance from the surfaces of the positioning blocks; and when the workbench is clamped and positioned, the surface of the tops of the pistons is tightly attached to the surface at the bottom of the workbench component tightly. The positioning device for the workbench has a simple structure, few application parts, a simple motion mode and high reliability and combination degree, modularized installation can be realized, and the detection effect of clamping the workbench is improved effectively.

Description

technical field [0001] The invention relates to the technical field of clamping and positioning, in particular to a workbench positioning device. Background technique [0002] At present, machine tools with movable worktables occupy a large part of the market demand. The movable worktables often need to be fixed during processing, so a clamping positioning mechanism is produced. The clamping mechanism commonly used in the market is to pull down through hydraulic pressure. Tightening workbench, such as Chinese patent CN 201067844Y discloses a positioning and clamping compound mechanism for exchanging worktables of large and medium-sized horizontal processing machine tools, which is mainly composed of tensioning oil cylinder and positioning tensioning oil cylinder. The tension of the oil cylinder is fed back by detecting the stroke of the oil cylinder piston, but it is impossible to detect the combination of the workbench and the positioning surface after the workbench positio...

AI Technical Summary

Problems solved by technology

[0003] In view of the above existing problems, the purpose of the present invention is to provide a worktable positioning device, so as to solve the problem of frequent pneumatic detection alarms caused by small deformation of the worktable due to clamping force when the movable workbench is clamped and positioned , so that the detection reliability of the clamping state of the workbench is effectively improved

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