SU1040472A1 - Machine-tool clamping device pressure regulator - Google Patents

Abstract

REGULATOR OF PRESSURE OF CLUTCHING OF DEVICES OF MACHINES, comprising a housing with. hydrolines for supplying main, controlled and drain pressure, an actuator installed in it, kinematically connected with an electric switch, and a plunger loaded on one side with a spring of a task connected with a regulating screw, and on the other a controlled pressure that differs , in order to simplify it and reduce the clamping time of the workpiece, the actuator is made in the form of a flange with a rod, loaded by a spring connected to the plunger and located in the flow cavity with a counter liruemym pressure between an end face of the plunger and the housing.

Description

The invention relates to mechanical engineering, in particular, to hydraulic actuators of clamping.-Devices of machine tools that provide work piece with adjustable force.

Pressure relays are known to control the pressure and supply a pulse to the electro-hydraulic system of the machine control when a predetermined pressure is reached at the point of installation of the relay, which corresponds to the installation of the tool on the stop. Such a relay includes a housing with main drain hydrolines and controlled pressures supplied by the end cavity of the plunger loaded with a spring and kinematically connected with the electric switch ij,

The drawback of the device is the possibility of false commands in connection with the loss of pressure in the pipeline and the operating organ itself.

The closest in technical essence to the present invention is a pressure regulator, comprising a housing with hydrolines for supplying the main, controlled and drain pressure, an executive body installed therein, kinematically connected with an electric switch, and a plunger loaded on one side by a spring of pressure with a regulating screw, and with another controlled pressure 2.

The disadvantages of the known controller, the torus are the complexity of the design of the controller itself and the complexity of installation in the machines.

The purpose of the invention is to simplify the controller and reduce the clamping time of the workpiece.

This goal is achieved by the fact that in the regulator the actuator is made in the form of a flange with a rod, a spring loaded with the plunger and located in a flow cavity with controlled pressure between the plunger end and the housing.

Nafig Figure 1 shows schematically the proposed pressure regulator of the clamping devices of the machines in Figure 2, the hydraulic circuit of the regulator. t

The pressure regulator of the clamping devices of the machines consists of body 1 ,. in which are made gkdrolini 2 for supplying the main pressure, hydroline (drain) for supplying the drain pressure 3, hydroline 4 for supplying a controlled pressure, the flow chamber 5 connected to the end chamber 6 of the plunger 7. The groove 8 of the plunger is connected by channel 9 to the end chamber 6 of the plunger 7 Executive body 10, executed;

in the form of a flange by a rod, is located in the flow cavity 5 of the housing 1. One end And its stem is kinematically connected with an electric switch. 12, and the other end 13 of the rod is loaded with a spring 14, the plunger 7 is loaded with a spring 15 of the task connected to the adjusting screw 16. The direction of movement of the piston during clamping is determined by the spool 1-7. The workpiece is clamped by a rotating cylinder 18.

The regulator works as follows.

When switching the spool 17

5 fluid from the hydraulic line 2 of the main pressure (Fig. 1). Through the cavity of the groove 8 of the plunger 7, channel 9, the end chamber 6 of the plunger. Cavity 5, hydroline 4 controlled pressure NNO and valve 17 enters the cylinder 18.

The groove 8 on the plunger 7 maintains a constant pressure in the hydroline 4, determined by adjusting the adjusting screw 16. As the pressure in the end chamber .6 rises above the set, the plunger 7 moves in the direction of compression of the spring 15, reducing the flow cross section at the inlet to

the cavity of the groove 8 and increasing the flow area at the outlet of the cavity of the groove 8 into the hydroline: 3 drains, which leads to a decrease in pressure. By reducing the pressure below

spring 15 displaces the plunger 7 and the pressure increases. As the piston of the cylinder 18 moves, the flange 10 is held in the flow cavity 5 by fluid flow and

the spring 14, being compressed, additionally loads the plunger 7, which results in an increase in pressure in the chamber 6 of the plunger. At the same time, the same force creates a pressure drop on both sides of the flange 10, numerically equal to the specified pressure increase. When stopping poradn cylinder 18, i.e. at that moment when the part is clamped, the flow of fluid stops, at both

the side of the flange 10 pressure. equated, the spring 14 displaces the flange 10 with the rod to its extreme upper position, at which the flange 10 enters the face chamber 6 of the plunger

all the way into the plunger 7, while

electric switch 12 provides a pulse to the electro-hydraulic station control system. When the flange moves, the liquid from the chamber 6 is displaced. In the cavity 5 through the gaps between the cylindrical surfaces of the flange and the end chamber 1 of the plunger 7 ..

The proposed pressure regulator - FOR clamping devices of machine tools provides the minimum possible clamping time, since the electric switch gives a signal when stationary working bodies, therefore / there is no need for limiting the flow of an animal bone, while in a known drive, to avoid spurious pulses, flow restriction is necessary, which leads to an increase in clamping time.

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Claims (1)

REGULATOR OF PRESSURE OF CLAMPING DEVICES OF MACHINES, containing case p. hydraulic lines for supplying the main, controlled and discharge pressures, an actuator installed in it kinematically connected to an electric switch, and a plunger loaded on one side with a task spring connected to the control screw, and on the other with a controlled pressure, characterized in that, ; in order to simplify it and reduce the clamping time of the workpiece, the actuator is made in the form of a flange with a rod, an unloaded spring connected to the plunger and located in the flow cavity with pressure between the end of the plunger and the housing. & rt.f