SU814672A1 - Feed mechanism to machine for working optical parts - Google Patents

Description

one

The invention relates to abrasive machining and can be used to create machine tools for machining optical parts.

Known mechanisms for the supply of machine tools for processing optical parts, made in the form of a rotary cam with a drive reciprocating motion til

A disadvantage of the known mechanisms is the complexity of their design both in terms of the execution of the executive bodies and the control system.

The purpose of the invention is to simplify the design of the feed mechanism.

 The goal is achieved by the fact that the feed mechanism is equipped with stops and an additional nursing cam located at the boundaries of the sector of the working feed of the cam, which is installed with the possibility of rotation on the cam shaft and interacting with the said stops.

FIG. 1 shows a pneumohydrocinematic scheme of the machine; in fig. 2 feed mechanism, general view; in FIG. 3 feed mechanism, cut.

On the bed 1, the headstock 2 is installed. On the rotary axis 3 bug; 2, the tool spindle 4 is mounted, with the drive 5. The headstock 2 is mounted on the bed 1 with the ability to move along the rails 6. The spindle 7 of the product with the drive 8 is mounted on the bed 1 guides 9 with the possibility of peremaceni vertically. The spindle 7 of the product with the drive 8 through the roller 10 rests on the feed mechanism

The feeder consists of a hydraulic cylinder 11 with a rail 12, a feed cam 13, a gear 14 and a nursing cam 15. The cam 13 and the gear 14 are rigidly connected to the shaft 16, on which it is installed with the possibility of free rotation within the sector, the working feed at the cam 13, the nursing cam 15. The feed sector is limited by the stops 17 and 18 made on the cam 13. The stops 17 and 18 interact with the ends of the cam 15. The minimum radius R of the transition surface 19 of the cam 15 is equal to the radius R of the feed cam at the beginning of the work feed sector. The sector 13 of the cam 13 is associated with the sector of raising and lowering the spindle 7 of the product. At the hub of the cam 15, a recess 20 is made under Licker 21, mounted on the frame 1.

Processing the first optical workpieces 22 are located in the slots of the rotary loading disk 23 mounted on the shaft 24. The loading disk 23 with the shaft 24 forms the loading mechanism.

The device works as follows.

Before the machine starts, the rake 12 is pushed inside the hydraulic cylinder 11. The roller 10 occupies the leftmost position with respect to sector / L and the spindle 7 is lowered down and the workpiece is in the slot of the disk 23 between spindles 4 and 7, and the cam 15 is lowered down.

When the machine is turned on, the spindles 4 and 7 are rotated, and the rail 12 moves upward, rotating the gear 14. The shaft 16 rotates with the cam 13. The gear 14 rotates with the cam 13. The roller 10 moves in the direction of the stop 18, raises up the spindle 7 of the product, when the roller reaches the point 10 l (the beginning of the working feed sector oi), the spindle 7 presses the workpiece 22 against the tool attached to the spindle 4 of the tool. During the subsequent rotation of the cam 13 within sector oi, turning the roller 10 and the spindle 7, the working feed of the workpiece to the tool is performed. Stop 17, touching the end of the cam 15,. causes it to rotate. When the roller 10 reaches the transition surface 19 of the cam 15, the roller 10 continues to move along the cam 15. The rotation of the cams 13 and 15 continues until the cam 15 is mounted on the latch 21 at the end of the stroke of the hydraulic cylinder rod, while the roller 10 is on the cylindrical nursing portion cam 15.

From the moment of fixing the cam 15, the surface of the workpiece is cared for. Simultaneously with the setting of the cam 15 to the latch 21, the end switch (not shown in the drawing) is triggered, which gives the command to reverse the rail 12 of the hydraulic cylinder 11. At this, the cam 13 reverses the cam, and the cam 15 remains in a fixed position until the stop 18, with further movement with the cam, will remove the cam 15 from the fixator 21. With the removal of the cam 15 from the fixer 21, the nudging of the workpiece surface, the cam

13 continues to rotate to the right, the roller moves to the cam 13, and the cam 15 goes down under its own weight. Upon further rotation of the cam 13 to the right, the roller 10, moving within the sector / 2 cam 13, is lowered together with the product spindle 7. With the lowering of the spindle 7, the machined workpiece is placed in the slot of the loading disk 23 and the next workpiece is fed into the treatment area by the loading device.

When the roller 10 of the cam 13 reaches the machine, the machine is brought to the first, the initial state and the processing cycle of the workpiece are automatically repeated.

Moving the piston of the hydraulic cylinder up and down occurs due to the supply of alternate compressed air from the air inlet / diffuser 25 into the lower cavities of the tanks 26 and 27. In the upper cavities of the tanks there is oil; The cavities are separated by flue gas from elastic oil-resistant rubber.

Adjusting the speed of movement of the piston of the hydraulic cylinder ii the moment of the working feed is produced by: throttle 28. Oil is switched to throttling by a slide valve 29 with control from the cam located on the shaft 16 (not shown).

The combination of the nursing time with the stroke of the hydraulic cylinder necessary to rotate the cam 13 by the angle L (working feed sector), eliminates the time loss with a single-cam mechanism with one hydraulic cylinder and simplifies the design of the mechanism.

Claims (1)

Invention Formula The feed mechanism of the machine for processing optical parts, made in the form of a rotary cam with a reciprocating drive, characterized in that, in order to simplify the design, the feed mechanism is equipped with lugs located at the boundaries of the sector of the working cam feed, and an additional swiveling cam installed on the cam shaft and interacting with the said stops. Sources of information taken into account in the examination 5 1. USSR Copyright Certificate No. 153027, cl. B 24 B 11/10, 1963.