CN203579240U

CN203579240U - Special fixture for machining inner circles of thin-walled sleeves

Info

Publication number: CN203579240U
Application number: CN201320758659.4U
Authority: CN
Inventors: 陈童诗; 余成毅; 王俊; 曹旭东
Original assignee: Jiujiang Precision Measuring Technology Research Institute
Current assignee: Jiujiang Precision Measuring Technology Research Institute
Priority date: 2013-11-27
Filing date: 2013-11-27
Publication date: 2014-05-07
Anticipated expiration: 2023-11-27

Abstract

The utility model discloses a special fixture for machining inner circles of thin-walled sleeves. The special fixture is characterized by comprising a cylinder, a piston and an elastic jacket. Air inlet holes are formed in the upper portion and the lower portion of the cylinder, the piston is arranged in the cylinder, an inner hole of the piston is a taper hole, the elastic jacket is nested in the piston, an outer circle of the elastic jacket is matched with the taper hole, an opening is further axially formed in the elastic jacket, a base is arranged at the lower end of the cylinder, and the cylinder and the piston can be sealed by the base. The special fixture has the advantages that the cylinder can be controlled, so that the thin-walled sleeves can be directly clamped and released by the special fixture, and the special fixture is convenient to assemble and disassemble, and the thin-walled sleeves can be firmly clamped by the special fixture.

Description

A kind of special fixture of processing thin-walled cover inner circle

Technical field

The utility model relates to a kind of clamping tool for machine work, particularly a kind of special fixture of processing thin-walled cover inner circle.

Background technology

When thin-wall sleeve adds fine finishining, easily deform, thereby affect its precision.In order to address this problem, people have developed the fixture of various structures, as a kind of end face compressing fixture being widely used, it is mainly comprised of setting element (as mandrel, spacer shell etc.) pressure ring and nut, rely on the axial force of nut that workpiece to be machined is fixed between pressure ring and setting element, then process.But, such fixture exists two deficiencies: first, owing to having gap between setting element and workpiece to be machined, adding man-hour, owing to being subject to the impact of cutting force, workpiece will deform, and, the closer to workpiece centre (axially), be out of shape more serious, thereby, affected the machining accuracy of workpiece; The second, because workpiece to be machined wall is thinner, when clamping pressure is larger, workpiece is easily distortion also, meanwhile, also workpiece both ends may be extruded to impression, if pressure is less, processing work is easily loosening.

Utility model content

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, the special fixture of the processing thin-walled cover inner circle of provide that a kind of installation accuracy is high, convenient disassembly, clamping are firm.

The special fixture of a kind of processing thin-walled cover inner circle providing according to the utility model, it is characterized in that comprising cylinder, piston and elastic jacket, wherein, cylinder upper and lower is equipped with air admission hole, and piston is located in cylinder, and its endoporus is taper hole, in elastic jacket, be placed in piston, its periphery wall coordinates with taper hole, elastic jacket axially on be also provided with an opening, cylinder lower end is provided with the base of cylinder and piston seal.

In addition, the utility model also has following attached technical characterictic:

Described elastic jacket lower surface and base corresponding position are provided with the adjustment screw that prevents that chuck from rotating in piston, also play the effect that prevents that chuck from moving up and down simultaneously.

Between described cylinder, piston and base, be respectively equipped with a road sealing device.

The tapering coordinating between described elastic jacket and piston is 6-10 degree, and the width of chuck upper shed is 0.5-3mm.

The special fixture of a kind of processing thin-walled cover inner circle providing according to the utility model, has the following advantages with respect to prior art tool:

First, while using the processing thin-walled cover of fixture of the present utility model, only thin-wall sleeve need to be put into chuck, axially by base inner face, be located, then by cylinder Automatic-clamping or unclamp, its installing/dismounting is very convenient, greatly reduces workman's labour intensity;

Secondly, in the utility model, between chuck and processed thin-wall sleeve, can integral body closely cooperate, do not have the loosening phenomenon tightly not occurring because of clamping, guaranteed machining accuracy.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, introduce in detail the utility model.

Fig. 1 is structural representation of the present utility model.

The specific embodiment

Embodiment, with reference to Fig. 1, the special fixture of a kind of processing thin-walled cover inner circle providing according to the utility model, comprises cylinder 1, base 2, piston 3, elastic jacket 4, sealing ring 5,6,7,8, screw 9, adjusts screw 10.Wherein, cylinder 1 upper and lower is equipped with air admission hole 12,13, connects high-pressure air source, and piston 3 is located in cylinder 1, its cylindrical coordinates with cylinder 1, endoporus is taper hole, is placed in piston 3 in elastic jacket 4, and its cylindrical coordinates with the taper hole of piston 3, coordinating tapering is 6 degree, can guarantee clamping force, make again the displacement of piston 3 be unlikely to excessive, guarantee the compactness of fixture; Elastic jacket 4 axially on be also provided with an opening 11, these opening 11 width are 1.5mm, are width the most rational, cross and may well cause thin-wall sleeve when processed, to produce ellipse, too smallly can not guarantee thin-walled sleeve clamping; Cylinder 1 is connected and fixed by screw 9 with base 2; Between cylinder 1, piston 3 and base 2, be respectively equipped with 4 place's sealing rings 5,6,7,8 in case leak-stopping gas guarantees the normal operation of fixture.

Elastic jacket 4 lower surfaces and base 2 corresponding positions are provided with and prevent that chuck 4 is at the adjustment screw 10 of piston 3 interior random rotations, also play simultaneously and prevent piston 3 part that drives chuck 4 to move together while moving up and pine does not go into operation.

While using the processing thin-walled cover of fixture described in the utility model, thin-wall sleeve to be processed is put into elastic jacket 4, by air admission hole 12 above of device to the interior input compressed-air of cylinder 1, to promote piston 3, move downward, by the tapering between piston 3 and elastic jacket 4, chuck 4 is compressed and accumulation of energys again, thereby by thin-walled sleeve clamping to be processed; After processing, from air admission hole 13 below to the interior input compressed-air of cylinder 1, to promote piston 3, move upward, elastic jacket 4 self elastic force effect under expand, thin-wall sleeve is released, takes out.

Above-described embodiment is only for illustration of the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that not departing from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1. the special fixture of a processing thin-walled cover inner circle, it is characterized in that comprising cylinder (1), base (2), piston (3) and elastic jacket (4), wherein, cylinder (1) upper and lower is equipped with air admission hole (12,13), piston (3) is located in cylinder (1), its endoporus is taper hole, in elastic jacket (4), be placed in piston (3), its cylindrical coordinates with taper hole, elastic jacket (4) axially on be also provided with an opening (11), the lower end of cylinder (1) is provided with the base (2) that cylinder (1) and piston (3) are sealed.

2. the special fixture of a kind of processing thin-walled cover inner circle according to claim 1, is characterized in that: described elastic jacket (4) lower surface and base (2) corresponding position are provided with the adjustment screw (10) that two places prevent that elastic jacket (4) from rotating and moving up and down in piston (3).

3. the special fixture of a kind of processing thin-walled cover inner circle according to claim 2, is characterized in that: between described base (2) and cylinder (1) and piston (3), be respectively equipped with the first sealing device (7,8); Between the outer wall of piston (3) and cylinder (1) inwall, be provided with the second sealing device (5,6).

4. the special fixture of a kind of processing thin-walled cover inner circle according to claim 3, is characterized in that: the tapering coordinating between described elastic jacket (4) and piston (3) is 6-10 degree, and the width of elastic jacket (4) upper shed (11) is 0.5-3mm.