SU1021572A1 - Apparatus for grinding part having partially cylindrical surface - Google Patents

Abstract

DEVICE FOR GRINDING DETAILS with partial cylindrical surfaces, comprising a housing with disposed therein planschayboy mounted in the mandrel centers kinematically linked through a sector with a leash is attached to the one center drive vozzratno rotational movement of the mandrel and placed in a rectilinear guide body a slider with a finger mounted in a closed groove, characterized in that, in order to increase the accuracy of the workpiece surface, the drive of the reciprocating movement of the mandrel is made in the form of a flat cam, the closed groove of which is composed of two symmetric segments of the Archimedes helix, and two steel flexible bands placed on the cylindrical surface of the sector and fixed at their opposite ends on the sector and slider edges. 5S (Л N5 СД ГС

Description

The invention relates to a machine tool industry and can be used when machining an incomplete cylindrical surface of parts on grinding and other machine tools.

A device for grinding a workpiece with a radial surface, containing a mandrel installed in the centers of the machine, is kinematically connected through a sector with a lead with a toothed sector mounted on one of the centers of the machine, and the drive of the reciprocating rotational motion of the mandrel, made in the form of a stationary body with straight lines. guides and mounted in the housing for rotation of the faceplate with an annular groove eccentric relative to the axis of rotation of the part. In this case, the housing is equipped with a slide mounted with a movable groove with a base mounted in the annular groove of the faceplate, and with a rail that meshes with the toothed sector 1.

A disadvantage of the known device is the low accuracy of the workpiece surface.

The purpose of the invention is to improve the accuracy of the treated surface.

This goal is achieved by the fact that, in a device for grinding a part with an incomplete cylindrical surface, comprising a body with a faceplate placed in it, a mandrel mounted in the centers, kinematically connected through a sector with a driver with a back-rotary motion of the mandrel mounted on one of the drives, the slider with a finger mounted in a closed groove in a straight housing case with a finger mounted in a closed slot, the drive of the reciprocating rotational movement of the mandrel is made in the form of a flat cam, a closed groove orogo composed of two symmetrical segments of Archimedean spiral, and two flexible steel strips arranged on the cylindrical sector surface and fixed at its ends to opposite edges of the sector and the slider.

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

The device consists of a housing 1 in which a faceplate 2 with a drive (not shown) is placed. The flat 2 is fastened to the plate 2 by means of screws 3, a flat cam 4, in the groove of which, consisting of two symmetrically arranged segments of the Archimedes spiral, includes a finger 5 with a support plate 6. Finger

5 is placed in a slider 7, moving along a rectilinear guide of the cover 8, fastened with screws 9 to the housing 1. By means of two parallel flexible steel bands 10, the slider 7 interacts with a sector 11 mounted coaxially with the fixed center 12. Each of the two flexible tapes 10 is fixed with their ends at opposite ends of the slide 7 and sector 11 with screws 13. On sector 11, a leash 14 is attached, connected to mandrel 15, based in centers 12 and 16. On mandrel 15, clamp 19 is fixed by clamp 1.7 through spacer sleeve 18.

The device works as follows. The part 19 secured to the mandrel 15 is installed in the centers 12 and 16. The water is imparted to the rotational movement of the faceplate 2 and the flat cam fixed to it 4. The cam 4 acts on the finger 5, which causes the reciprocating movement of the slider 7, which, in turn

by means of two parallel-arranged steel flexible belts 10 interacts with sector 11, together with it an oscillatory motion. Installed in sector 11, the leash 14 transmits the same oscillatory motion to the mandrel 15. Thus, the part 19 performs a reciprocating rotational movement around the center line of the device. The angle of deviation of the part can be changed by selecting flat cams with different magnitudes of the Archimedes spiral helix of the closed groove.

The use of a cam with an Archimedes spiral profile in the device ensures the uniformity of the rotary feed movement, which creates the same conditions of the grinding process during the feed stroke, and the use of a drum-and-belt transmission eliminates any play.

Thus, the proposed device

for grinding, it improves the accuracy of the workpiece surface.

view / 1

Claims (1)

GRINDING DEVICE FOR PARTS WITH 'INCOMPLETE CYLINDRICAL SURFACE, comprising a housing with a faceplate placed in it, a mandrel mounted in the centers, kinematically connected through a sector with a leash with a rotary motion drive of the mandrel mounted on one of the centers, and placed in rectilinear guides slider with a finger mounted in a closed groove, characterized in that, in order to improve the accuracy of the workpiece surface, the drive of the reciprocating movement of the mandrel flax in the form of a flat cam, the closed groove of which is composed of two symmetrical segments of the Archimedes spiral, and two steel flexible tapes placed on the cylindrical surface of the sector and fixed with their ends on opposite edges of the sector and slider. FIG. 7