SU1456286A1 - Quick-change chuck - Google Patents

Abstract

The invention relates to mechanical engineering and can be used: for fastening a tool while being; machining on drilling and other machines. The aim of the invention is to reduce the time for changing the tool due to its self-clamping in the chuck. The quick-change cartridge comprises a housing 1, a sleeve 2 with a tool 3 and three clamping rollers 4 placed in an internal cylindrical groove 5 in an axial section 1 of the housing 6 version 1. In the groove 8 of the sleeve 2 there is a holder 9 with wedge surfaces. On the side of the rear end of the sleeve 2, there are grooves for the passage of the rollers. The sleeve 2 is inserted into the axial bore of the housing so that the rollers pass through the grooves and are turned against the direction of rotation of the tool. When machining, the yoke 9 is wedged with the rollers and the tool in the sleeve 2 rotates with the body. When making wedge surfaces with radial protrusions, the cartridge provides self-installation of the tool, and when performing additional wedge surfaces on the holder, symmetrically existing, the cartridge can be used for processing in the reverse rotation mode, for example, for threading. f-ly, 6 ill. I (L, rs th ate tc 00 05

Description

The invention relates to the field of mechanical engineering and can be used to fasten a tool when machining on drilling and other machines.

The aim of the invention is to reduce the time for changing the tool due to its self-clamping in the chuck.

FIG. 1 shows the cartridge, general view, longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 - chuck in which the tool holder. It is installed with the possibility of angular self-alignment on the hole being machined; in fig. 4 is a section BB in FIG. 3; in fig. 5 — node I in FIG. in fig. 6 — node II in FIG. 3

The cartridge includes a housing 1, a sleeve 2 with a tool 3, three clamping rollers 4 placed in an internal cylindrical bore 5 in an axial bore 6 of the housing 1. The rollers are mounted with a clearance on the axis x 7 fixed in the case and arranged parallel to its axis.

On the outer surface of the sleeve 2 BHnoiiHeHa is a cylindrical groove 8 with end surfaces bounding it. In the cylindrical bore B, the holder 9 is fixed with wedge flat surfaces 10, which can also be made either in the form of rims 11 along the edges of the holder or in the form of radial projections 12 in it. middle part. From the rear end of the sleeve 2 is made with an exit into its cylindrical groove grooves 13, designed to pass the rollers when installing the sleeve in the axial bore of the housing 1.

In another design of the cartridge, additional wedge surfaces 14 are made symmetrically located to the surfaces 10 relative to the axis of the grooves 13. A stop 15 is fixed in the housing, which determines the position of the sleeve in the housing after its installation into the axial opening of the housing.

The cartridge operates as follows. The sleeve 2 with the tool 3 is inserted into the axial hole of the housing 1, aligning the rollers 4 with the grooves 13, and is moved to the stop 15. Then it is turned in the direction opposite to the rotation of the tool until the rollers come into contact with the clan surfaces 10 of the sleeve 9.

Used by the cutting force, the cage is wedged with rollers

0

five

five

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45 JQ and sleeve 2 are securely fastened and centered in housing 1.

For a tool change, the sleeve 2 is turned in the opposite direction until the rollers align with the grooves and are removed from the housing.

When the yoke 9 with the wedge surfaces is made in the form of the sleeves 11, the centering of the sleeve 2 is ensured due to the reduced influence of the errors of the shape of the wedge surfaces in contact with the rollers.

When the casing 9 with wedge surfaces in the form of radial protrusions 12 is made, the sleeve 2 is able to rotate angularly, which allows the cartridge to be used when deploying and threading, when self-installation of the tool along the machined hole is desired.

If it is necessary for the cartridge to operate in the reverse rotation mode during thread cutting), additional wedge surfaces 14 are made on the holder, ensuring the wedging of the holder during reverse rotation.

Claims (2)

1. Quick-change chuck containing tool holder, clip with wedge surfaces and clamping rollers installed with the possibility of interaction with them, which also means that, in order to reduce the time for tool change, the tool holder is made in the form of a sleeve with a cylindrical groove on the outer the surface and the end surfaces limiting the groove, and the holder is fixed in the groove, while the cartridge is provided with a housing with an axial bore and an internal cylindrical groove, with the clamping rollers placed in the groove and mounted with a clearance on the On the axis of the rear end of the sleeve, grooves are made to exit into its cylindrical groove, which are intended for the rollers to pass when the holder is inserted into the axial opening of the housing. 2. A cartridge according to claim 1, characterized in that, in order to improve the accuracy of centering, the wedge surfaces on the cage are made in the form of protruding along its edges. The cartridge under item 1, about t l and h 1D56286 a toch pa te ro do si la and so that, in order to expand the technological capabilities due to the angular self-installation of the holder, the wedge surfaces on the holder are made in the form of radial projections. 6 D. Patron on PP. 1–3, in order to expand technological capabilities by operating in the reverse rotation mode, additional wedge surfaces are made on the holder, symmetrical to the grooves for the passage of the rollers. Fig.z figl eleven ////////// Л 71 5