CN204262395U - A kind of tile type fixture for thin-wall workpiece - Google Patents

Abstract

The utility model relates to a tile-type clamp used for thin-walled workpieces. The technical solution is: the tile-type expansion sleeve is connected and fixed by a tension spring, and the workpiece to be processed is installed on the tile-type expansion sleeve. The outer side of the tile-type expansion sleeve is a cylindrical structure, and the inner side is provided with a tapered hole. The mandrel is inserted into the tapered hole of the sheet-type expansion sleeve, and the hexagonal screw is connected through a gasket on the outside of the tapered hole, and the hexagonal screw is screwed in to make the tile-type expansion sleeve move along the left end of the mandrel. Under the joint action of the shaft thrust, the tile-type expansion sleeve is radially enlarged until it is close to the inner surface of the workpiece to be processed. The beneficial effects are: firstly, the utility model does not have a dead point of expansion and contraction, which can ensure the overall processing accuracy of the workpiece; secondly, the elastic performance and fatigue resistance performance of the extension spring are much higher than that of the expansion sleeve itself, and the service life is longer than that of the traditional expansion sleeve; Finally, the tile-type expansion sleeve can make the expansion sleeve have good expansion and contraction ability by replacing the tension spring. Even if the single piece of the expansion sleeve needs to be reprocessed, the processing process is simpler.

Description

A tile-type fixture for thin-walled workpieces

technical field

The utility model relates to a fixture in mechanical processing, in particular to a tile-type fixture used for thin-walled workpieces.

Background technique

Due to the poor rigidity and weak strength of thin-walled parts, they are easily deformed during processing, and the shape and position tolerance of the parts increases, which makes it difficult to guarantee the processing quality of the parts. Therefore, strict requirements are put forward for the clamping of thin-walled parts, the reasonable selection of cutting tools and the selection of cutting amount in the cutting process. Thin-walled parts are deformed in the manufacturing system, the main factors are: the clamping conditions of the workpiece. Due to the relatively poor rigidity of thin-walled parts, improper selection of the action point of the central tightening force and supporting force during processing will result in additional stress; the elastic deformation of clamping and pressing will affect the dimensional accuracy, shape and position accuracy of the part surface to a certain extent , resulting in deformation. The use of expansion sleeves in the existing fixtures makes the manufacture and installation of parts simple and widely used. However, the traditional expansion sleeves divide the cylinder with tapered holes into three parts, cut the outlet groove and leave the root, that is, keep the cylinder from being damaged. Completely disassembled, under the use of external force, from the mandrel, the elastic properties of the metal achieve the expansion and contraction function. The traditional expansion sleeve has the following disadvantages: (1) After repeated use, due to metal fatigue, the expansion and contraction performance of the expansion sleeve is affected, and the precision of the fixture is lost; (2) The expansion sleeve is integrated at the root of the groove (that is, the root) Yes, there is no expansion and contraction function here, which is the dead point of expansion and contraction. There is a gap between the outer diameter of the expansion sleeve and the inner diameter of the workpiece at the dead point, which affects the accuracy of the workpiece; (3) Compared with the expansion sleeve of the utility model, the traditional The processing process of the rising sleeve is slightly complicated.

Contents of the invention

The purpose of this utility model is to provide a tile-type clamp for thin-walled workpieces for the above-mentioned defects in the prior art.

The technical solution is: including mandrel, tile-type expansion sleeve, tension spring, gasket, and hexagonal screws. The tile-type expansion sleeve is connected and fixed by tension spring, and the workpiece to be processed is mounted on the tile-type expansion sleeve. , The outside of the tile-type expansion sleeve is a cylindrical structure, and the inside is provided with a tapered hole. Insert the mandrel into the tapered hole of the tile-type expansion sleeve, connect the hexagonal screw through the gasket on the outside of the tapered hole, and screw it in The hexagon screw makes the tile-type expansion sleeve move along the left end of the mandrel, and under the joint action of the tension spring and the thrust of the mandrel, the tile-type expansion sleeve increases radially until it is close to the inner surface of the workpiece to be processed.

The above-mentioned tile-type expansion cover is composed of the first separated tile expansion cover single piece, the second separate tile expansion cover single piece, and the third separate tile expansion cover single piece, and the first separate tile expansion cover The cover piece, the second separate tile expansion cover piece, and the third separate tile expansion cover piece are arc-shaped structures, butt each other to form a circular structure, and the outer walls are respectively provided with tension spring annular grooves.

The beneficial effects of the utility model are as follows: firstly, there is no expansion and contraction dead point in this separate tile-type expansion sleeve, which can ensure the overall processing accuracy of the workpiece; secondly, the elastic performance and fatigue resistance of the tension spring are much higher than that of the expansion sleeve In itself, the service life is longer than that of the traditional expansion sleeve; finally, the tile-type expansion sleeve can regain good expansion and contraction ability by replacing the tension spring. Even if the single piece of the expansion sleeve needs to be reprocessed, the processing process is simpler.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is the cross-sectional view of the tile type expansion cover of the present utility model;

Accompanying drawing 3 is the side view of the tile type expansion sleeve of the present utility model;

In the figure above: Mandrel 1, tile-type expansion sleeve 2, workpiece to be processed 3, tension spring 4, gasket 5, hexagonal screw 6, tension spring annular groove 2.1, first separated tile expansion sleeve single piece 2.2, The second split type tile expansion set single piece 2.3, the third separate type tile expansion set single piece 2.4, groove 2.5.

Detailed ways

In conjunction with accompanying drawings 1-3, the utility model is further described:

The utility model comprises a mandrel 1, a tile-type expansion sleeve 2, a tension spring 4, a gasket 5, and a hexagonal screw 6. The tile-type expansion sleeve 2 is connected and fixed by the tension spring 4, and the workpiece 3 to be processed is installed on the On the tile-type expansion sleeve 2, the outer side of the tile-type expansion sleeve 2 is a cylindrical structure, and the inner side is provided with a tapered hole. Insert the mandrel 1 into the tapered hole of the tile-type expansion sleeve 2. The outer side is connected to the hexagonal screw 6 through the gasket 5, and the hexagonal screw 6 is screwed in to make the tile-type expansion sleeve 2 move along the left end of the mandrel 1. Under the joint action of the tension spring 4 and the thrust of the mandrel 1, the tile-type expansion sleeve 2. Make radial expansion until it is close to the inner surface of the workpiece 3 to be processed.

Referring to accompanying drawings 2 and 3, the tile-type expansion cover 2 is composed of the first separated tile expansion cover single piece 2.2, the second separate tile expansion cover single piece 2.3, and the third separate tile expansion cover single piece 2.4 , and the first separated tile expansion sleeve single piece 2.2, the second separate tile expansion sleeve single piece 2.3, and the third separate tile expansion sleeve single piece 2.4 are respectively arc-shaped structures, which are mutually butted to form a circular structure, And the outer wall is respectively provided with extension spring annular grooves 2.1, and the right end of the inner cavity is provided with a groove 2.5 for placing gaskets.

When working, use the tension spring 4 to connect and fix the tile-type expansion sleeve, install the workpiece 3 on the expansion sleeve 2, insert the mandrel 1 into the tapered hole of the expansion sleeve, and screw in the hexagonal screw 6 to make the expansion sleeve along the The left end direction of the mandrel moves, and under the combined action of the extension spring and the mandrel thrust, the expansion sleeve is radially enlarged until it is close to the inner surface of the workpiece 3 to be processed. If the hexagon screw is unscrewed, the expansion sleeve will move to the right end of the mandrel and shrink radially, and the workpiece can be removed at this time.

The advantages of the utility model are: firstly, there is no expansion and contraction dead point in this separate tile-type expansion sleeve, which can ensure the overall machining accuracy of the workpiece; secondly, the elastic performance and fatigue resistance of the tension spring are much higher than the expansion sleeve itself , the service life is longer than the traditional expansion sleeve; finally, the tile-type expansion sleeve can make the expansion sleeve have good expansion and contraction ability by replacing the tension spring. Even if the single piece of the expansion sleeve needs to be reprocessed, the processing process is simpler.

Claims (2)

1. the tile type fixture for thin-wall workpiece, it is characterized in that: comprise axle (1), tile type ringfeder (2), extension spring (4), pad (5), hex screw (6), described tile type ringfeder (2) is connected and fixed by extension spring (4), workpiece to be processed (3) is contained on tile type ringfeder (2), the outside of tile type ringfeder (2) is cylindrical structural, inner side is provided with bellmouth, axle (1) is inserted in the bellmouth of tile type ringfeder (2), hex screw (6) is connected by pad (5) in the outside of bellmouth, precession hex screw (6) makes tile type ringfeder (2) move along the left end direction of axle (1), under the acting in conjunction of extension spring (4) and axle (1) thrust, tile type ringfeder (2) does radial increase until be close to workpiece to be processed (3) inner surface.

2. the tile type fixture for thin-wall workpiece according to claim 1, it is characterized in that: described tile type ringfeder (2) is made up of the first separate type tile ringfeder monolithic (2.2), the second separate type tile ringfeder monolithic (2.3), the 3rd separate type tile ringfeder monolithic (2.4), and the first separate type tile ringfeder monolithic (2.2), the second separate type tile ringfeder monolithic (2.3), the 3rd separate type tile ringfeder monolithic (2.4) are respectively arcuate structure, mutual docking forms circular configuration, and on outer wall, be respectively equipped with extension spring cannelure (2.1).