SU850357A1 - Device for working optical parts with aspherical surfaces - Google Patents

Description

I

The invention relates to abrasive machining and can be used in the manufacture of optical parts used in optical-mechanical and optical-electronic devices.

According to the main author. St. No. 239071 discloses a device for treating optical components with aspherical surfaces, comprising a product spindle, tables of longitudinal and transverse movements, a hinged-suspended swinging head with a rotating toric or barrel-shaped tool, kinematically connected with a cam by means of a pantographing mechanism. The cam is mounted on a vertical shaft mounted on a cross-mounted slider mounted on the table, which interacts with the cylindrical copier by means of a lever mechanism, co-actuating it with the table longitudinal movement. A rocker is also mounted on the vertical shaft.

interacting with the stop, which is located on the table of the longitudinal movement. This device allows you to process optical components with different aspherical surfaces and reduce the impact of cam profile inaccuracy on machining accuracy by increasing the pantograph coefficient 1.

The disadvantage of the device is

10 a few hundred cells / times increase. Pressure on the table mounted: the longitudinal movement of ynoipi as a result of an increase in the angle between the body and the force that drives the rock mass, and the normal to the working surface of this stop within J. as far as swing cam at work. This leads to an increase in the amount of deformation and non-uniform wear.

Claims (1)

30 of the working surface of the stop causing the violation :; the calculated value of the cam swing angle and toolpath, and thus C1, the machining accuracy of the aspherical surface. The purpose of the invention is to improve the accuracy of processing aspherical surfaces. The goal is achieved by the fact that the device is equipped with a rack-and-pinion mechanism that connects the rocker with a vertical shaft and is designed as a guide carriage mounted on the slide mounted on the slide with a rail engaging with the vertical shaft located on the lower end. gear, while the carriage is mounted on with the ability to move in a direction parallel to the movement of the table for the longitudinal / about movement. The drawing schematically shows the proposed device. The device includes a spindle 1 of product 2 mounted on a table 3 of longitudinal movement by means of a rotary head 4. A spindle 5 of a toric or barrel-shaped tool 6 is mounted in a pivotally-suspended swing head 7 located on the slide 8 by means of an axis 9. The slide 8 is mounted in the guide tables 10 transverse displacement. On the slide 8, a vertical shaft 11 is mounted, on the upper end of which a cam 12 is fixed, and on the lower one there is a gear 13, kinematically connected through the rail 14 to the carriage 15. The latter is mounted on rails 16 fixed on the slide 8 of the table 10. Guides 16 arranged parallel to the direction of movement of the table 3. The carriage 15, through the rocker arm 17, with the roller interacts with the stop 18 fixed on the table 3. The cam 12 is kinematically connected to the articulated-suspended head 7 through a pantographing mechanism consisting of levers 19 and 20 The action of the spring 21 or other power closure device. The levers 19 and 20 are connected to each other by means of a roller 22, the axis of which is fixed on the lever 19. On a vertical wap.P there is a drum 23 on which one end of the cable wound around it is attached and the other end is connected to a spring 24. On a slide 8 is a cylindrical copier 25 V, kinematically connected to the stop 18 by means of a lever 26 mounted on a table 10. The spindle 5 is connected to the drive 27 by means of a belt drive. The device works as follows. The spindle 1 of the product 2 performs rotational and reciprocating along with the table 3 a longitudinal movement. The reciprocating movement of the table 3 is carried out in a direction parallel to the axis of rotation of the spindle 5 of the tool 6. During the reciprocating movement of the table 3, the stop 18 fixed to it moves the hinged-suspended head 7 and the tool 6 by means of, for example, a carriage 15 , rack and pinion gear 13-14, vertical shaft 11, cam 12 and levers 19 and 20 of the pantographing mechanism. At the same time, preliminary transverse displacement is also reported to tool 6 along with an articulated outboard head 7 with the help of a cylindrical copier 25 and chip 26 cooperating with an abutment 18. This movement is mainly used with high asphericity of the treated surface. The force closure of the roller of the rocker arm 17 of the carriage 15 with the stop 18 is carried out by means of rod 24, the drum 23, the vertical shaft 11 and the rack pair 13 and 14. The force shorting of the hinged-out head 7 with the cam 1.2 is carried out by the spring 21 by means of the levers 19 and 20. The proposed device eliminates the increase in pressure on us-. On the table of longitudinal movement, the stop when the cam is rotated, because the angle between the direction of movement of the carriage and the working surface of the stop remains constant during operation, i.e. the direction of the moving carriage force coincides with the pressure to the working surface of the abutment (with the pressure directed to the abutment), so the pressure on the abutment is equal to the driving force of the carriage and does not change when the cam is rotated i This eliminates the uneven wear of the working surface of the abutment and the change in its deformation that provides cam swing and tool movement in accordance with the calculation and thereby increases the accuracy of machining aspherical surfaces. The invention The device for processing optical parts with aspherical surfaces according to the author. No. 239071, in order to improve the processing accuracy, it is equipped with a rack-and-pinion mechanism linking the beam; with a vertical shaft and made in the form of guides, which are located on the rails attached to the device and fixed on the slide. carriages with a rail, which are interlocking with gears placed on the lower end of the vertical shaft, while the carriage is mounted for movement in a direction parallel to the movement of the table dp of longitudinal movement. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 239071, cl. B 24 B 13/02, 1967.