On-off fixture positioning device

Abstract

The invention provides an unblocking and blocking type clamp positioning device which comprises a clamp body and a positioning body mounted on the clamp body. The positioning body is provided with a through passage and a valve body mounting hole inserting with the passage. A valve body is movably mounted in the valve body mounting hole, so that the valve body is movably limited in the positioning body. The valve body is provided with a through hole, which is located in the passage of the positioning body, in at least one position, the passage of the positioning body smoothly passes the through hole of the valve body, and unblocking of the clamp positioning device is achieved; the valve body is provided a through hole, for blocking the positioning hole, in at least one position, and blocking of the clamp positioning device is achieved. The clamp positioning device has the advantages that gas and water feeding of the positioning device can be controlled effectively, waste caused by gas and water feeding when a workpiece cannot fall on the positioning device is avoided, and loss of a workpiece positioning detecting function is avoided. In addition, no new connecting pipelines are added, and the clamp positioning device is simple to implement and low in cost.

Description

technical field [0001] The invention belongs to the technical field of mechanical parts, and relates to a positioning device, in particular to a positioning device with a switchable water channel or an air channel. Background technique [0002] In the automatic fixture of machine tools, the most common workpiece positioning method is two pins on one side, where "one side" is the positioning support surface of the workpiece, and the components used are fixture positioning blocks. Generally, the positioning support surface of each set of fixtures consists of at least three positioning block composition. In the process of workpiece processing in the production line, the iron chips generated by cutting are easy to fall on the positioning surface and the bottom surface of the workpiece. After one piece is processed, it is necessary to clean all the positioning block surfaces and the bottom surface of the newly processed workpiece before clamping For processing, in automatic line...

AI Technical Summary

Problems solved by technology

[0003] On the other hand, in the collinear production of different models, taking the collinear production of a four-cylinder machine and a six-cylinder machine as an example, since the length of the workpiece of the six-cylinder machine is greater than that of the four-cylinder machine, when processing the six-cylinder machine, the workpiece It can fall on all positioning support blocks, and all positioning blocks can be used normally and can realize their functions through water or ventilation; but when processing a four-cylinder machine, because the workpiece length of the four-cylinder machine is smaller than that of the six-cylinder machine, when the workpiece When falling, it cannot fall on all the positioning blocks. Some positioning blocks cannot touch the bottom surface of the workpiece. In this way, water resources will be wasted during the water passage process. During the ventilation process, the positioning blocks and the ventilation holes on the bottom surface of the workpiece will not be touched. Cannot be plugged to create air pressure and therefore position detection

If the inaccessible positioning block and the accessible positioning block are separately connected and controlled separately, not only the pipeline connection is complicated, but also more connecting elements and switching elements are required

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