SU666063A1 - Tool for finish working by plastic deformation of internal and external surfaces - Google Patents

Description

I

 The invention relates to the field of machine building and can be used in the treatment of the outer and inner cylindrical surfaces of annular rectangular grooves by surface plastic deformation.

Devices are known for simplifying the processing of external and internal cylindrical surfaces in which a cantilever freely rotating deforming roller is mounted in a cantilever, the axis of which constitutes a certain deluge with the axis of rotation of the workpiece. These devices allow the inner and outer cylindrical surfaces of annular rectangular grooves to be sequentially processed. In this case, the outer diameter of the cantilever roller should be less than the width of the groove.

But in the case of strengthening treatment of the cylindrical surfaces of narrow grooves, such a device, due to the small diameter of the deforming roller having low rigidity, does not allow to obtain high-quality surfaces.

The purpose of the present invention is to extend the technological capabilities of the device.

the possibility of processing them with cylindrical surfaces of annular rectangular grooves in a wide range of sizes.

The goal is achieved by the fact that the deforming roller is thick in the form of a thicket, in the second case the largest outer diameter is smaller than the diameter of the inner one to be machined; the outer surface, the largest inner diameter is larger than the diameter of the outer cylindrical surface to be machined, and the angle of intersection of the axes of rotation of the roller and the workpiece is determined from the ratios:

   .iLislMiISSir,

i a / ieccf 2К, гНз

15

H-inP nj TRT

 2R, 2R

2c

(2Ej) + H

(2R, r

at

i

oflte

and

n1-chk

and

i

P (Yaz) (,

where RI is the radius of the machined cylindrical surface of the groove; RI is the radius of the inner cylindrical surface of the groove; Ns is the largest internal radius of the deforming element;

p4 is the largest outer radius of the deforming element;

I am the depth of the treated surface; a is the installation angle of the deform1fu {of the element.

FIG. 1 shows the proposed device; in fig. 2 shows the processing by the device of the inner cylindrical tube top of the annular rectangular groove; Fig, 3 - processing circuit device external cylindrical surface of the groove.

In the holder on the bronze bushing 2, a conical deforming element is mounted with the possibility of free rotation - roller 3, which is made in the form of a cup. The axis of rotation of the roller is located at an angle a to the axis of rotation of the workpiece 4. The roller surface 5 of the roller is tapered with the angle at the apex 2 ("Ee), where a is the indentation angle, which is usually equal to O 30. Correspondingly, the inner conical surface 6 of the roller is made with the angle of the click ver. bus (a-ft). The end surface 7 of the cup roller is also conical with an angle at the top () with the opposite arrangement of the cone tip. The largest outer diameter of the roller 2R4, its largest inner diameter J 2B 3 and the angle of the axis of rotation are chosen from the highest ratio.

In operation, the slider roller S feed with S along the axis of the rotating seam, first treating one, natfimer internal cylindrical surface 8 of the groove, and then displacing the device in the radial direction and processing the outer cylindrical surface 9 of the ring. shaped rectangular groove. The parameters RS, R4 and the angle of intersection of the axis of its erasure with the axis of rotation of the workpiece are determined from the condition that the outer and inner surfaces of the roller are machined with the inner 8 and outer 9 cylindrical surfaces of the groove of the workpiece.

The application of the proposed device allows the processing of cylindrical surfaces. annular rectangular grooves in a range of sizes.

Claims (1)

1. Chistovaya surface treatment of automotive parts plastic deformation M., Institute of Avtoprom, 1969, p. 79.   . .xf-r..g “4L I - rfl h .-, i .. .. ......, .. - .. "-.". "W666063