SU749644A1 - Band-grinding apparatus - Google Patents

Description

one

The invention relates to grinding and polishing complex surfaces with an endless belt.

A belt-grinding device containing a contact element, equidistant surface to be machined for thickness, and a belt wear compensator in thickness is known. The disadvantage of this device is the low precision of processing of the end sections of the part of the complex-shaped profile when the sanding belt is worn in thickness.

The purpose of the invention is to increase the processing accuracy by eliminating the kinematic error of the first order arising from the wear of the tape in thickness,

This is achieved by the fact that the parts of the contact copier are equipped with holders and mounted with the help of them on the shaft with the possibility of turning relative to the pin their contact with each other, lying on the working surface of the contact copier and passing through the geometrical

the axis of said shaft, and the said holders are hingedly connected by means of a slider with a slider, the movement control of which is carried out from the wear reducer along the thickness.

FIG. 1 shows a device in the plane of rotation of parts of a contact copier; in fig. 2 - the same, side view;

Driving with grinding speed Vjt grinding belt 1 goes around

10 support roller 2 of the compensator 3 of wear of the tape in thickness and a contact copier made of two parts 4 and 5 (the remaining elements of the tape-drawing mechanism are 1 FETCH cheek, tension and

15 guide rollers - not shown in the drawing). The working profile of the parts of the copier 4 and 5 is equidistant on the tape thickness of the surface 6 to be machined.

20

Parts of the copier 4 and 5 are fixed respectively on the holders 7 and 8, having the ability to rotate on the shaft 9 fixed on the plate 1O. Lini

contact parts 4 and 5, lying on the working surface of the contact copier, passes through the geometrical axis of the OO shaft 9. To adjust this arrangement of the contact line of the copier parts (for example, after its wear and adjustment) these parts are fixed on the holders with

offset against holders.

The holders with the help of hinges 11 and 12 of them 13 and 14 with the help of the hinge 15 are connected with the slide 16, having the ability to move in the guide 17 fixed on the plate 10.

The slider 16 is connected to the drive of its movements, for example with the piston of the power hydraulic circuit 18, the body of which is fixed on the plate 10.

The power cylinder 18 of the hydraulic 1esky is connected with a hydraulic device 19 controlling them, which is kinematically connected to the belt wear compensator 3, with a junction on the rocker arm 20. The spring 21, turning on the axis 22 of the rocker arm, presses the compensator 3 to the straddle tape 1,

A plunger or part is fed to the plunge. In the first case, the shear 10 is mounted on the output link 23 of the feeder, and the part is on the frame (or on the rolling mechanism, if the treatment is carried out according to the run-in method).

 When the device is in operation, the rotating grinding belt 1 processes the child; 1-6, wears out gradually in thickness, which leads to a failure of the extreme points a and b of the part. OETSHKO compensator 3, under the spring with a worn tape, acts on the hydraulic device 19, which issues a command (a signal proportional to the amount of wear, which is proportional to the rotation of the rocker arm with the compensator) to the power head 18, which biases the slide 16 downwards, which results in 13 and 13 14 expands the holders 7 and 8 with parts a and b parts. Wherein

there is a refinement of parts of the parts adjacent to these points.

At the same time, the compensator 3 acts on the feed mechanism (in the drawing

not shown), displacing the part or contact copier by the amount necessary to complete the profile at the specified points,

The effect of using

The proposed device, i.e. the degree of increase in processing accuracy depends. on the amount of wear of the tape in thickness and geometrical parameters of the workpiece. When processing blades

gas turbine engines with abrasive belts of grain size No. 40, the accuracy of processing along the edges can be increased by 0.2-0.3 mm.

Claims (1)

Invention Formula A tape-grinding device containing a profile contc copier made from interconnected parts and tape wear compensator in thickness, characterized in that, in order to improve processing accuracy by eliminating the kinematic error of the first order, the thickness of the tape from wear, parts of the contact copier are provided with holders with which they are mounted on the shaft rotatably relative to the line their contact between lying on the working surface of the contact copier and passing through the geometrical axis of the specified shaft, and the mentioned holders are hingedly connected by means of a slider, the control which movement is carried out From the belt wear compensator to the pitch. Sources of information taken into account in the examination 1. E. Grisenko. Research and the development of the grinding process of hard-to-cut materials with abrasive tapes with intermittent working surface. ness. Dissertations, Odessa, 1977.