SU793724A1 - Drilling head - Google Patents

Description

five; an internal stage 6 of the telesonic cylinder, having a replaceable power unit and a branch pipe 7 at the rear end for supplying compressed air to the air motor 4, equipped with a valve seat 8; an outer (middle) stage 9 of the telescopic cylinder, provided with a clamp 10 for compressing the bag during processing and an annular groove 11 for supplying fluid to the rod cavity 12 of the inner stage; an outer cylinder 13 provided with two annular cavities, one of which is the rod end 14 of the middle stage 9 n is communicated via a choke with a check valve 15, a separator valve 16, a distributor 17 and a disconnecting valve 18 with the air line, and the other cavity 19 communicates the rod cavity 12 inside step 6 through a choke with a check valve 20, a check valve 21 or a clavier of succession 22 with a non-rod (hydraulic) cylinder floor of the separating piston 23, which controls the spool valve valve 16.

Shtokov cavity separation 1orshp 23 through the valve 17 is communicated with the pipeline. The nonstock cavities 24 of both stanchions of the telescopic cylinder are connected through a throttle with a check valve 25 with an air line and through a throttle 26 with a control valve of the sequence 22 of the cylinder. consists of a hydroaccumulator spring 28, connected through a check valve 29 to the hydraulic system of the head. The pneumatic distributor 17, which is switched on by the button 30, is siaben by a ball retainer fixing the spool in the switched on position, and a return valve 31. The separation valve 16 is provided with a pusher 32 of adjustable length.

The head works as follows.

When you press the button 30 pneumatic valve 17 air from the line through the disconnecting valve 18, the throttle with check valve 25 enters the non-cavity cavity 24 of both stages of the telescopic cylinder. The middle stage 9 of the telescopic cylinder, together with the internal stage 6 and the replaceable power unit installed in it, moves to the left at the speed specified by the throttle with the check valve 15, until it stops in the package being processed and compressed by the clamp 10. At the beginning of the movement of the middle stage 9 of the telescopic cylinder nozzle 7 the inner stage 6 departs from the seat 8 from the valve 27 and opens the access of air to the air motor 4. Moving the middle stage up to the stop 10 in the treated bag occurs at air pressure below nomi net pressure in the network, therefore, the internal step 6 does not move relative to the middle 9, since the rod cavity of step 6 will be behind the valve of the sequence 22. After the co-tact and compression of the package being processed by the clamp 10, the pressure in the pneumatic head is increased to the nominal value sequence 22. Valve tripping sequence 22 ensures that fluid escapes from rod stock iolost 12 in the inner step 6 and tool iodine 1 at the speed specified by the choke with reverse the valve 20. At the same time, the liquid from the rod iolost 12 stages through the choke with a check valve 20 and the valve

sequences 22 are displaced into the non-rod cavity of the separator piston 23. The latter, displaced to the right, displaces the air from the squamous cavity through the pneumatic distributor 17 to the atmosphere. The spool of the separation valve 16 will block the rod cavity 14 with the atmosphere and, moving further to the right, the adjustable length pusher 32 acts on the main valve 17, removes it from the retainer and under the action of the return spring 31 occupies the rightmost position.

Compressed air from the line and leads to the rod cavity of the separator piston 23. The latter, moving to the left, displaces the fluid from the non-cavity cavity through the check valve 21, the throttle with the check valve 20 and the annular cavity 19 in the cylinder 13 of the head into the rod cavity 12 of the internal stage 6 telescopic cylinder, which, together with the tool 1 is retracted to the right, at the same time holding the middle stage 9

with a clamp 10 compressing the processed package. The non-cavity cavities 24 of the telescopic cylinder communicate through a choke with a reverse claian 25 and a distributor 17 with the atmosphere. AT

the extreme right position of the internal stage 6 relative to the stage 9, the separating piston 23 occupies the extreme left position, and the separating valve 16, which is controlled by it, opens the line

for supplying compressed air into the rod end 14 of the middle stage 9 of the telescopic cylinder. Middle stage 9 with clamp 10 returns to its initial position along with tool 1, and

the pipe 7 with its seat 8 comes into contact with the valve 27 of the cylinder 13 and blocks the access of air to the pilot motor 4.

The head is prepared to repeat the cycle of work.

Claims (2)

1. A drilling head comprising a tool rotation drive, an iris for compressing the workpieces and a tool feeding mechanism, characterized in that, in order to simplify the design and increase the reliability of the head, the pressing mechanism and tool feeding mechanism are made in the form of a telescopic two-stage cylinder the stage of which is associated with the clamp and has two annular cavities, and internally contains a replaceable power unit, including the tool and tool actuator, and has one annular cavity; A telescopic cylinder control unit is introduced that is hydraulically connected to the annular cavities of the cylinder. 2. The head according to claim 1, characterized in that the control unit includes a pneumatic-hydraulic cylinder with a separating hole, a separating valve, a pneumatic distributor and an adjustable pusher, while the spool of the separating jan clan is rigidly connected to the separating piston, and the adjustable plunger interacts with the pneumatic distributor spool end of the tool stroke. Sources of information taken into account in the examination 1. Stepanenko V. et al. Technical progress in aircraft construction. - Mechanical Engineering, M., 1975, p. 130-132. 4 5 s . “VV5: .4S3S5 sSS2 (SLG. -J: I f: t 2ZZ2ZZZ ZZ2 I. ,, .. L ---- ....- J Cpi / zJ Phage. 2