SU1511069A1 - Duplicating grinding device - Google Patents

Abstract

The invention relates to the field of metalworking and can be used in the processing of complex surfaces, such as turbine blades on copy-grinding machines. The purpose of the invention is to improve processing accuracy. The device includes a table 2 moving reciprocatingly. On the table is placed with the possibility of swinging the body 3, on which the slider 5 with the cam 7 and the roller 8 is placed with the movement. The roller 8 rests on the copier 9 mounted on the table 2. The forming equipman 9 of the inner branch of the Nichomed conchoid the angle of rotation of the housing 3, the distance between the axes of the roller 8 and the copier 6 and the distance between the axes of the swing of the housing 3 and the roller 8. When the grinding wheel 11 is worn, the swing angle of the housing 3 changes and depends on the portion of the copier 9 with which it contacts roller 8, copier 6 takes Assumption providing location axis copier and items in the same vertical plane. 3 il.

Description

Swing axis -j / /

sd

05 WITH

Figg

The invention relates to metalworking and can be used for processing on copy grinding machines for complex surfaces, such as turbine blades.

The purpose of the invention is to improve processing accuracy.

The goal is achieved by automatically adjusting the device when the grinding wheel is worn.

Fig, 1 shows the device a general view; FIG. 2 is a view A of FIG. one; Fig. 3 is a diagram of the position of the centers of the copier and the support roller with a change in the angle of the body

The grinding machine on the copy machine contains a frame

1, on which a table 2 is mounted with an axle-fixed housing 3 having guides 4, on which a slider 5 is located, carrying a copier 6 fixed coaxially with the fixture for the part 7. The support roller 8 which is in contact with the additional 9, mounted on the table

2. Copier: 6 rests on the cam roller 10, and part 7 on the grinding wheel 11, mounted in the spindle

grandmother. The slider 5 is connected to the housing 3 by means of a spring 12.

Device; works as follows.

Copier 6 rests on roller 10, Table 2 together with body 3 performs a reciprocating motion. Since the body 3 is mounted on the axis of the cantilever, when the roller 10 is lowered by means of a feed mechanism (not shown), the copier 6 with the workpiece 7 will also be lowered until the circle 11 hits the part to the required depth. With a rotating circle and a reciprocating movement of the table with the body 3, the copier 6, moving along the copying roller 10, will cause the swinging copying movement of the body 3 and the reproduction of the profile of the copier on the workpiece. When making a feed to the line due to rotation of the copier 6 and the part 7 around a common axis, the swing angle of the housing 3 will change. In addition, as the grinding wheel is worn, the swing angle will change when machining the same point on the part. Turning the housing 3 around the swing axis causes the support roller 8 to move along the surface

The copier 9, whose surface has a shape that allows the slide 5 to move along the guides 4, in which the position of the copier axis and the workpiece remains in the same vertical plane, thus eliminating the error caused by the displacement of the contact point when the angle of inclination of the housing changes.

In the diagram (Fig. 3) the following is indicated: distance 1 between the axis of the support roller and the axis of the copier 6; the distance a between the axis of swing of the body 3 and the axis of the copier; O - the origin of coordinates, coinciding with the axis of swing; M .. .M .. .K - the position of the axis of the support roller; R. ..P. . .Pf, - the position of the axis of the copier 6.

Since the value of 1 is constant, in order to ensure that the axis of the copier moves along straight lines in points when the body 3 is tilted by angle, it is necessary to change the distance OM, which is determined by the formula

OM --1.

cos If

If we denote 0} p, then p a / costf-1.

The resulting formula is an equation for the internal branch of Nicomedes conchoid in polar coordinates. Thus, the centroid equation of the support roller is defined.

I.

In order to ensure the movement of the center of the support roller according to the found law, the forming surface of the copier 9 should be equidistant to the centroid. The equidistant coordinates are found by the known formulas:

p .pv 2rpl.

  {7

1 g g (p sint bpcosif) t cf arccos - pcost -f -HF

(T where r is the radius of the support roller.

Claims (1)

Invention Formula Copier-grinding device, including a reciprocating table, mounted on it with the possibility of swinging neither the case carrying the copier and the part attachment, the copier roller and the grinding wheel, differing in that, in order to improve the machining accuracy, the device is equipped with an additional copier mounted on the table and placed on the case with a slider carrying the copier and an additional roller for interacting with an additional copy, wherein the forming profile of the additional copy is performed by ec10696 see the internal branch of the Nichomed conchoid, described by the equation f a / coscf l, ipe / is the distance between the axis of the additional roller and the axis that the body rotates ;. a is the distance between the body swing axis and the axis of the first 10 copier; H.- angle swing body; 1 is the distance between the axis of the additional roller and the axis of the copier. Internal SemSb KOHJCO - go nikopaea SifSuiucrnH-go to Conlo The location of the copier axis and details