Special fixture for processing outer circle of long-cylinder part

Abstract

The invention relates to a machining fixture, and discloses a special fixture for processing an outer circle of a long-cylinder part. Guide sleeves, taper sleeves and lock nuts are mounted at the two ends of a central spindle of the special fixture symmetrically and sequentially from inside to outside; the guide sleeves are in large-small end structures; the small ends of the guide sleeves are fixed with the central spindle by set screws; through holes are formed in casings at the large ends of the guide sleeves; ejection blocks are arranged in the through holes; cambered surfaces and grooves are arranged and formed at the outer ends of the ejection blocks; taper surfaces are arranged at the inner ends of the ejection blocks; cones of the taper sleeves eject the taper surfaces of the ejection blocks; and annular springs are mounted around the grooves of the ejection blocks. According to the special fixture, radial ejection block ejecting workpieces are added on the basis of axial clamping; radial motion during the processing of the outer circles of the workpieces is avoided; the centering precision is high; with the adoption of the matched design of the guide sleeves and the taper sleeves, and added shaft sleeves, centering clamping can be adjusted conveniently according to the length and an inner hole of the long-cylinder part; and the generality of the tool fixture for processing the outer circle of the long-cylinder part is improved.

Description

technical field [0001] The invention relates to a machining fixture, in particular to a special fixture for machining the outer circle of long cylinder parts. Background technique [0002] Cylindrical grinding and turning of long cylindrical parts usually use the mandrel + support ring to position and clamp the inner hole. The clamping structure of the mandrel + support ring used in the past is mostly one-to-one fixed: that is, long cylindrical parts with one length specification and inner hole can only be configured with one mandrel + support ring fixture according to the part design. Cylindrical grinding and turning of long cylindrical parts with different lengths and inner holes requires different corresponding mandrel + support ring fixtures, which makes an enterprise need to configure a lot of mandrel + support ring fixtures, which are large in number and inconvenient to manage , increased fixtures, high processing costs. Simultaneously, in order to assemble and disas...

AI Technical Summary

Problems solved by technology

Another way of positioning and clamping is to use tapered sleeves for positioning and clamping at the two ports of the inner circle of long cylindrical parts. This positioning and clamping method will affect the quality of parts processing due to the accuracy of the contact between the two ports. Therefore, the above Two ways, even if the hole of the same size is affected by the size tolerance, it is difficult to control the machining accuracy

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