Rigid out-covered clamping device of vertical fine boring machine

Abstract

The invention discloses a rigid out-covered clamping device of a vertical fine boring machine, comprising a clamping canister provided with a connection seat, wherein the middle-lower part of the outer wall of the clamping canister is provided with a fixed ring; the fixed ring is matched with the inner wall of a sleeve through an O-shaped seal ring, wherein the length of the sleeve is less than that of the clamping canister, an upper flange plate and a lower flange plate are fixed on the sleeve; an upper vent hole and a lower vent hole are arranged on the sleeve, the inner end faces of the upper flange plate and the lower flange plate are both matched with the outer wall of the clamping canister through the O-shaped seal ring; an upper locating ring and a lower locating ring are arranged on the inner wall of the clamping canister; a pressing ring for fixing the upper end surface of a workpiece is fixed on the upper locating ring; a support ring is fixed on the outer wall of the clamping canister close to the top end; three brackets are evenly arranged on the support ring and are all movably connected with a pressing plate through a shaft; one end of the pressing plate corresponds to the upper end surface of the pressing ring, and the other end corresponds to a jack-prop fixed on the flange plate on the sleeve. The clamping device solves the precision problems of large conicity, poor depth of parallelism, horn mouth occurrence at two calibers and the like during boring, which are caused by that the length of the inner hole of a large-size workpiece is longer, thereby improving the replaceability and installation precision of the clamp and the quality of products.

Description

1. Technical field [0001] The invention relates to a fixture for mechanical processing, in particular to a rigid outsourcing clamping device for fine-boring inner holes of a cylinder liner using a vertical fine-boring machine. 2. Background technology [0002] The main reason why it is difficult to guarantee the dimensional tolerance and shape tolerance of the inner hole processing of the internal combustion engine cylinder liner and other shaft sleeve parts is the clamping clearance between the clamp and the workpiece and the deformation of the clamp. For the length between 130 and 250mm The inner and outer circular wall thickness is only 2.2mm, the wall thickness difference is only 0.06mm, the roundness of the inner hole is 0.03mm, and the parallelism is 0.012mm. To meet these requirements at the same time, five elements should be considered, one is machine tool guarantee; the other is fixture guarantee; the third is tool guarantee; the fourth is personnel guarantee; the f...

AI Technical Summary

Problems solved by technology

Using a simple upper and lower gland type fixture, using its up and down pressing principle for fixture production, its disadvantages are that the pass rate of workpieces processed by this kind of fixture is low, the precision of the fixture is low, and frequent replacement and adjustment

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