CS230458B1 - Device for air or hydraulic clamping of rotating parts on grinding machines by grooving in the supports - Google Patents

Abstract

Device for pneumatic or hydraulic clamping of rotating parts on grinding machines for grinding by grooving in supports. The device is intended mainly for clamping inner rings of rolling bearings for grinding their raceways by grooving. The essence of the device according to the invention is that it consists of a rotary clamping element in the shape of a hollow cylinder with a flat bottom, located with respect to the spindle on the opposite side of the clamped part, while a hollow extension in the shape of a tube, firmly connected to the axially displaceable body of the clamp and provided with an opening for supplying pressure medium, extends into the cavity of the clamping element with clearance.

Description

(54) Equipment for pneumatic or hydraulic clamping of rotating parts on grinders for plunge grinding in supports

Device for pneumatic or hydraulic clamping of rotating parts on grinders for plunge grinding in supports. The device is mainly intended for clamping inner rings of rolling bearings for plunge grinding of their raceways.

The essence of the device according to the invention is that it consists of a rotating clamping element in the shape of a hollow cylinder with a flat bottom, located with respect to the spindle on the opposite side of the clamped part, while a hollow tube-shaped extension, firmly connected to the axially displaceable body of the clamp and provided with an opening for the supply of pressure medium, extends into the cavity of the clamping element with clearance.

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230,458

230,458

The invention relates to a device for pneumatic or hydraulic clamping of rotating parts on grinders for grinding by plunge grinding in supports, in particular for grinding the raceways of inner rings of rolling bearings.

Known devices use the forces of an electromagnet or permanent magnet to clamp rotating parts, especially rolling bearing rings, to the driving face of the working spindle. The disadvantage of this arrangement is that the parts must be demagnetized after grinding, and even after demagnetization, undesirable residual magnetism remains in the parts. Another disadvantage is that this arrangement can only clamp parts made of magnetic materials. Parts made of non-magnetic materials cannot be clamped at all with this arrangement, and parts made of low-magnetic materials, such as stainless steel, can be clamped only with great difficulty.

The disadvantages of the above devices are eliminated by the device for pneumatic or hydraulic clamping of rotating parts on grinders for grinding by the plunge method in supports, according to the invention, the essence of which is that it consists of a rotating clamping element in the shape of a hollow cylinder with a flat bottom, located with respect to the spindle on the opposite side of the clamped part, while a hollow extension in the shape of a tube, provided with a collar, firmly connected to the axially displaceable body of the clamp and provided with an opening for the supply of a pressure medium, extends into the cavity of the clamping element with clearance.

The arrangement of the device according to the invention brings the advantage that the rotating clamping element does not touch any part of the clamping device when clamping and grinding the component. This guarantees high clamping and grinding accuracy, while any inaccuracy of other parts of the clamping device is not transferred to the clamped and ground component.

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Another significant advantage is that there is no need to magnetize and demagnetize parts and that there is no residual magnetism left in the ground parts.

The attached drawing shows an example of a specific embodiment of the device according to the invention.

A device for pneumatic or hydraulic clamping of rotating ^parts on grinding machines for grinding in a recessed manner in bearings, especially for grinding raceways of inner rings of rolling bearings, is characterized in that it consists of a rotating clamping element 1 in the shape of a hollow cylinder with a flat bottom, located with respect to the spindle 7 on the opposite side of the clamped part 2, wherein a hollow tube-shaped extension jr, provided with a collar 6, firmly connected to an axially displaceable body 4 of the clamp and provided with an opening % for supplying a pressure medium, engages with clearance in the cavity of the clamping element 1. The spindle © 7, the clamped part 2 and the rotating clamping element 1 form a kinematically single unit, and the collar 6 and the extension 2 are separated from the inner walls and bottom of the rotating clamping element 1 by a layer of pressure medium, which either creates an aerodynamic or hydrostatic cushion.

The component 2 is supported from below in unmarked supports and is pressed against the working spindle 7 by the axial pressure of the rotary clamping element 1 exerted by a pressure medium, which can be compressed air or pressurized liquid, supplied through the opening 5, in the direction indicated by the arrow. This pressure is constant. When the working spindle 2 starts to rotate, it carries the clamped component 2 and the rotary clamping element 1 by friction and the grinding operation can begin. The clearance between the collar 6 of the extension 2 * the inner walls and the bottom of the rotary clamping element 1 brings the advantage that the rotary clamping element 1 does not touch any part of the clamping element during grinding. This ensures that any inaccuracies of other parts of the clamping device are not transferred to the clamped and ground component and that the clamping and grinding accuracy is guaranteed. By eliminating the magnetic clamping of components, it is not necessary to demagnetize the components after grinding and there is no unwanted residual magnetism left in the ground components.

Claims (1)

SUBJECT OF THE INVENTION 230 458 Apparatus for air or hydraulic clamping of rotary components on grinding machines for stabbing in backrests, in particular for grinding raceways of roller bearing inner rings, characterized in that it consists of a rotating clamping element (1) in the form of a hollow cylinder with a flat bottom positioned to the spindle (7) on the opposite side of the clamped part (2), wherein a hollow tube-shaped extension (3), provided with a collar (6), is firmly connected to the cavity of the clamping element (1) with a collar (6) fixedly connected by an axially displaceable body and provided with an opening (5) for supply of pressure medium ·