SU554138A1 - Optical profile grinding machine - Google Patents

Description

one

The invention relates to the field of engineering and can be applied to the processing of high-precision shaped parts, templates, cutting tools, etc.

Known optical lrofileshlifovalny machines, which are based on the control of the size and profile of the workpiece put Combining in the processing of images of the contours of the part and template, reproduced in an enlarged view of the screen 1.

The known machine includes a grinding head, a coordinate table for fixing the workpiece and a template made on a 1: 1 scale, as well as an optical system of mirrors, magnifier, sources of illumination of the workpiece and a template and a screen for projecting the image.

The disadvantage of the known machine is the presence in its optical system of a translucent mirror (for image overlay), which causes the loss of screen brightness by more than 50%. Insufficient lightness of the screen determines the poor contrast of the resulting images.

The introduction of light filters slightly deteriorates the contrast, but leads to an additional loss of lightness (by 50%), as a result of this, the screen appears weak

illuminated, and therefore insufficiently clear image of the part and template.

Introduction of a switching node with a subjectively perceived frequency contributes to a slight increase in contrast, but the screen illumination even with the use of powerful illuminators remains insufficient.

The aim of the invention is to improve the accuracy of the optical image of the contours.

the workpiece and n Ablon.

This goal is achieved by the fact that the optical system of the machine is equipped with a lens enveloping system with a magnification of 1. In the front focal plane of which the workpiece is located, and the rear focal plane is aligned with the template and with the focal plane of the lens enlarger, while the illuminators of the angular are placed on the lens inverting system. The zoom lens of the optical system is short-focus.

The drawing schematically shows the proposed machine.

A device 2 is mounted on the coordinate table 1 for fixing the workpiece 3. With table 1, the stage 4 is rigidly connected to secure a drawing (template: dia: Positive) 5 on it, which is 1: 1. With a bed of flocks

a bracket 6 is rigidly connected to which the illuminator 7 is fixed to illuminate the workpiece with transmitted light.

A grinding head 8 is mounted on the machine stand, carrying a grinding wheel 9, and means are provided for the relative movement of the grinding head and the workpiece. A symmetric lens wrapping system 10 is installed with an increase in I between the latter and the template in the path of the transmitted light from the illuminator 7 to illuminate the workpiece, the workpiece 3 is located in its front focal plane 11, and the pattern 5 is installed in its back focal plane 12.

In the course of the light flux from the source 7, a zoom lens 13 is mounted directly behind the gablon, then a system of mirrors 14 and a screen 15, the rear focal plane 12 of the reversing system being at the same time the front focal plane of the zoom lens 13.

An illuminator 16 is mounted on the housing of the wrapping system 10 to highlight the pattern. On the screen 15, images of the workpiece 17, the template 18, as well as the working part 19 of the grinding wheel are projected.

The adjustment and operation of the machine is carried out as follows.

Part 3 is fixed in fixture 2 on the coordinate table 1, template 5 is fixed on the stage 4, having the possibility of installation movement relative to table 1. The illuminators 7 and 16 are switched on. The light stream from the illuminator 7, the passage along the working part of the periphery of the circle and the workpiece and then through the wrapping system around the periphery of the contour of the template through the lens enlarger and the system of mirrors, enters the screen on which images 17, 19 and 18 are projected, respectively, of the workpiece, the working part of the grinding wheel and the corresponding portion

pattern. The images 17 and 18 are aligned on the screen by setting the stage 4 so as to have a minimum allowance during processing. Turn on the rotation and oscillating movement of the grinding wheel 9.

During processing, the part moves together with the template and the wrapping system, as a result of which the screen is projected

the part being processed, the working part of the grinding wheel and the corresponding part of the core.

The proposed optical system. It allows to improve the screen illumination, increase the contrast of images, which allows the CTBj-eT method to increase the accuracy and processing performance.

Claims (2)

1. Optical profile grinding machine, including grinding head, coordinate table for fixing the workpiece and the template, made on a 1: 1 scale, as well as the optical system from mirrors, magnifier, illumination sources of the workpiece and the pattern and screen for projecting an image, characterized in that, in order to improve image accuracy, the optical system equipped with a lens inverting system with increasing I, in the front focal plane of which the workpiece is located, and the rear focal plane is aligned with the template and with the focal plane lens magnifier, while the template lights are placed on the lens wrapping system. 2. Machine according to Claim 1, characterized in that the zoom lens is made short-focus. The source of information taken into account in the examination: 1. USSR author's certificate No. 145461, M-. Cl.2V 24V 19/20, I960 L