SU779060A1 - Grinding device - Google Patents

Description

(54) DEVICE FOR GRINDING

I

The invention relates to grinding tools and can be applied in manual grinding machines.

A device for grinding, made in the form of a disk, is attached to which an elastic pad is attached, covered with sandpaper 5. The disk is equipped with a mandrel, which is mounted on the clamp, clamped the ends of the skins 1.

A disadvantage of this device is the difficulty of tensioning the pelt. If at the moment of contact with the clamp the sandpaper does not stretch across the entire working surface, this is preserved after the clamping. Moreover, at the moment of clamping, the elastic cushion deforms, which causes additional sanding of the sanding pelt. Lack of tension of the pelt leads to defects in sanding surfaces and rapid wear of the sanding pelt.

The purpose of the invention is to ensure uniform tensioning of the sanding pelt.

This goal is achieved by the fact that a concentric recess is made on the pressure side of the disk, and the pressure head is made in the form of a multi-petal element.

FIG. 1 shows the device section; in fig. 2 is a view A of FIG. one;

The device has a disk 1 provided with a concentric recess 2. A cushion 3, for example rubber, is attached to the disk 1, for example glued, and elastic. The sanding pelt 4, wrapped around it, and the elastic cushion 3 and adhering to the face of the disk 1, are clamped by a clamp 5 made in the form of a multi-petal element with elastic petals 6. The stiffness of the petals of the clamp is chosen so that the clamping force developed by them is sufficient to hold the grinding pelts in the grinding process. To increase the amount of deformation of the petals in the radial direction, the latter are made concave. The clamp 5 has a smooth hole, centering it relative to the threaded mandrel 7, fixedly mounted in the center of the recess 2 of the disk. A nut 8 is threaded onto the threaded mandrel.

The device works as follows.

D oment of the initial contact of the arizhima 5 with the sandpaper 4, adjacent to the free end of the disk 1, is shown in FIG. 1 dash line. During the subsequent tightening of the nut 8 onto the threaded mandrel 7, the middle part of the clamp 5 enters the recess 2 of the disc. When this occurs, the deformation of the petals of the elastic element and moving in the radial direction. Contacting the petals with the pelt leads to its shifting and tension. The movement of the petals in the radial direction is stopped when the clamp 5 with its middle part rests against the end of the recess 2 of the disk.

Claims (1)

Invention Formula A grinding device made in the form of a disk, to which an elastic cushion is attached, covered with a sanding cloth fixed with a clamp mounted on a mandrel fixed to the disk, characterized in that, in order to ensure even tension of the grinding sandpaper, on the pressure side of the disk made concentric notch, and the clamp is made in the form of multi-petal element. Sources of information taken into account during the examination 1. Schegolev V. A. and Ulanov M. E. Elastic abrasive and diamond tools. L., “Mechanical Engineering, 1977, p. 113.