SU753558A1 - Hydraulic drive for feeding deep-drill head - Google Patents

Description

The spool 5 of the working feed is held in the upper position by a spring-loaded valve 17, having a limited stop 18 stroke, In the pressure line 2 a throttle 19 for fast strokes is installed. The pressure pipe 2 is connected to the rod cavity 20 of the hydraulic cylinder 8 by the line 21.

The spool of 9 fast moves is made with hydraulic control from the spool 22,

 Hydraulic head drilling works as follows

To accomplish a quick supply, a 5-axle electromagnet 22 is turned on. Simultaneously the electromagnet of the spool 15 is turned on, preparing a forced feed. valve 16 - to the piston cavity 10 of the hydraulic cylinder 8, through the channels of the spool 22 - to the lower cavity of the spool 9 quick strokes, through the choke 3 with the regulator 4 - to the spools 5, 9 of the working feed and fast x ode

The spool 9 quick strokes under pressure of oil is moved to the upper position, while the spool 5 of the working feed is in the upper position, which is held by a spring-loaded latch 17. The oil through the spools 5.9 of the working feed and fast strokes and the node 11 of the forced feed is directed to the piston the cavity 10 of the hydraulic cylinder 8, a quick supply of the drill.

. When the drill approaches the workpiece, the cam 6, holding the spring-loaded latch 17 and the working feed spool 5, is moved to the lower position by the action of a spring. At the same time, the oil in the cavity 1 of the hydraulic cylinder 8 continues through the spool 9 fast moves and the nodes 11 of the forced feed. After pulling out the spring-loaded latch 17, the cam b moves up to the stop of the latch 17 to the stop 18 and remains in this position until the end of the working feed.

When the tool touches the part, the electromagnet of the spool 15 of the force-feeding unit 11 is turned off. After that, the oil into the cavity 10 of the hydraulic cylinder 8 enters only through the throttle 3 with the regulator 4 and the spool 9. The oil consumption through the throttle 3 with the regulator 4 corresponds to the value of the working minute supply of cutting. In the process of further metal cutting, as the load increases, the electromagnet of the spool 22 turns off, while the spool 9 of fast strokes is moved to the lower position. The oil from the cavity 10 of the hydraulic cylinder 8 is displaced through the hammer 9 into the tank. Under the action of oil pressure in the cavity 20 of the hydraulic cylinder 8 connected permanently by a line 21

with pump 1, a quick intermediate withdrawal of the drill and cam 6 begins. At the same time, the oil through the spool channels 9 fast strokes is directed to the end cavity of the working feed spool 5, moving it to the upper position in which it is locked with a spring-loaded latch 17 After the intermediate quick discharge of the drill ends the cycle repeats.

The proposed hydraulic drive allows an increase in drilling performance by reducing the time lost at the initial non-revenue.

on intermediate non-revenues of the tool to the workpiece and on overruns.

Claims (1)

Invention Formula A hydraulic drive for a deep-hole head with a stepped cutting cycle, containing a pump with a pressure line and 5 throttles installed in it with a regulator hydraulically connected to the working feed spool controlled by a cam connected to the hydraulic cylinder rod, high-speed spool and the piston cavity of the hydraulic cylinder, bearing in mind that, in order to increase drilling performance, the hydraulic actuator is equipped with a forced feed unit connected by an input to a pressure line between the working feed spools moves fast, and output - between the last and the cavity of the piston and designed as a series-connected adjustable choke valve and a solenoid operated check valve. Sources of information taken into account in the examination 5 1. Bron L. S., Tartakovsky J. E. Hydraulic drive of aggregate machines and automatic lines. M. “Mechanical Engineering, 1967, p. 193, fig. 103