Quick-lock anti-auxetic tire for inner hole and end face positioning workpiece

Abstract

The invention discloses a quick locking anti-pull expanding tire of a workpiece being positioned by using an inner hole and an end face, and relates to the field of high-precision quick locking fixtures for numerically-controlled machine tools. The quick locking anti-pull expanding tire comprises an expanding sleeve, a tapered core shaft and a tapered jack screw, wherein the tapered core shaft stretches into the expanding sleeve in the axial direction; a radial cylindrical through hole is formed in the axial side wall of the expanding sleeve; a radial tapered groove is formed in the axial side wall of the tapered core shaft; the size of the tapered jack screw is fit with those of the cylindrical through hole of the expanding sleeve and the tapered groove of the tapered core shaft; after the expanding sleeve is assembled with the tapered core shaft, the tapered jack screw penetrates through the cylindrical through hole in the radial direction and stretches into the tapered groove of the tapered core shaft, thereby realizing fastening connection. With the adoption of the quick locking anti-pull expanding tire, high-precision quick locking of the workpiece being positioned by using the inner hole and the end face can be realized; clamping positioning can be carried out simply by using the inner hole and the end face; the processing of the excircle and the end face is not affected; the quick locking anti-pull expanding tire is simple and convenient to use; and on the premise of ensuring the positioning precision, the clamping efficiency is improved.

Description

technical field [0001] The invention relates to the field of high-precision fast locking fixtures for positioning workpieces on the end faces of inner holes, in particular to fast locking and anti-stretching tires for positioning workpieces on inner holes and end faces. Background technique [0002] In the CNC machining of precision parts, fast and high-precision clamping becomes the main factor determining the machining accuracy and efficiency. Especially for non-penetrating hollow, that is, blind cavity workpieces, when the inner hole and end face are used to position and process the shape, and the shape, inner hole, and end face have geometric accuracy requirements such as coaxiality and perpendicularity of not more than 0.01mm, the alignment of the part , Clamping is time-consuming and labor-intensive, and the accuracy is difficult to guarantee. [0003] At this stage, the finishing of the above parts, whether it is CNC lathe or CNC milling, is positioned by the inner h...

AI Technical Summary

Problems solved by technology

The positioning of the inner hole often uses tire expansion. Generally, the outer wall of the cone mandrel of the tire is provided with threads, which are screwed in the direction of the end face of the part. In order to achieve the reliability of the tire expansion, the thread of the cone mandrel is very long and needs to be rotated many times. In order to realize the clamping or dismounting of the workpiece, the efficiency is low

Moreover, it affects the processing of the end face, and is not suitable for the needs of fast clamping and positioning of CNC machine tools

[0004] Processing by the above method, the average clamping time is longer, because the end face cannot be formed at one time, the precision is low, and the secondary positioning processing has a serious impact on the efficiency

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