SU1050813A1 - Apparatus for balancing assembly being vertically moved - Google Patents

Description

The invention relates to a machine tool industry and, in particular, can be applied in precision machine tools that have a movable assembly, for example, a spindle head or a traverse portal, which is moved with a screw-nut by means of a lara.

It is known a device for ur-suspension of vertically relocatable nodes, made in vice springs, connected by means of bendings and blocks with a balanced node, one of the blocks being made in the form of a spiral, which ensures a constant balancing force regardless of the position of the node and the deformation, 1 J .

A disadvantage of the known device is that its use is justified only on light machine tools. When the weight of the rolling unit increases, the dimensions of the springs grow sharply, which makes it impossible to embed this device in heavy and medium-sized machines.

The purpose of the invention is to reduce the size of the device when used in heavy and medium-sized machines and increase the accuracy of movement.

This goal is achieved by the fact that the device for balancing a vertically intermixed unit, connected to a force mechanism by means of flexible connections and guiding blocks, is equipped with a cam rigidly mounted on the block, and the force mechanism is designed as a hydraulic cylinder, a pneumohydraulic accumulator and a pressure transducer, moreover, a rod the hydraulic cylinder cavity is connected to the pneumohydroaccumulator and the output channel of the pressure transducer, controlled by the cam and connected by its input channel to the input ystvo pump.

The drawing shows the proposed device.

The device consists of a vertically movable node 1 from the electric motor 2, and the node 1 by flexible elements 3 and 4 is connected through a system of guide blocks 5-7 to a hydraulic cylinder 8 to which the pneumohydroaccumulator 9 is connected. A make-up system consisting of a pump 10 is provided to fill leaks pressure valve 11, filter 12 and pressure transducer 13 controlled by cam 14 rigidly mounted on one shaft with blocks 6 and 7. The output pressure of converter 13 is determined by the angle of rotation of cam 14 and corresponds to itannomu closed for hydraulic cylinder system - accumulator in the absence of leakage. The cam shape 14 is selected according to the characteristic of the pressure transducer 13. Consequently, the oil supply through the converter is determined by leaks in the hydraulic system. For visual adjustment and control of the system, there are pressure gauges 15,

In order that when moving unit 1 and maintaining a constant volume in the hydraulic cylinder-battery system, the tension of the cable 3 does not change, unit 7 has the shape of a spiral, calculated using the formula | D

 {J.

. r, g is the radius of the block;

b is the integration constant determined from the initial conditions — the moment of force on the shaft of the block; c is the product of the pressure in the gas cavity of the pneumohydroaccumulator to the volume of this cavity at t

H - the angle of rotation of the block; e is the base of the natural logarithm.

With this form of block, the moment of force on the shaft of the block, and consequently, the balancing force, remain constant regardless of the speed of movement and the position of the ejected node.

The device works as follows.

When the pump 10 is turned on, the oil will squeeze the pneumohydroaccumulator 9 until the pressure in the system of hydrocyliner-accumulator, as determined by the setting of the pressure converter 13, is reached. When moving the movable unit down, the piston of the hydraulic cylinder 8 rises and the pressure in the hydraulic cylinder-battery system rises,. At the same value, by increasing the radius of the compressor 14, the pressure setting of the pressure transducer 13 does not increase. going on. The condition of the tension force of the cable 3 with an increase in the tension force of the cable 4 is compensated by a corresponding decrease in the radius of the block 7,

When moving the bottom unit up, the piston of the hydraulic cylinder 8 is lowered, the pressure in the hydraulic cylinder-battery system and the pressure of the pressure transducer 13 decreases, the tension of the cable 4 decreases, the increase in the radius of the unit 7 is increased, the cable 3 is tightened 3O and 50513 four

The cylinder battery remains constant. It is an element and an element that accumulates enermi, just as when moving a moving vapa (pneumo-beater

reins down. .komupor) will be installed next to

Use as a power fur-machine.

a hydraulic cylinder with pnevmogitsroakku-5 The presence of a system of make-up with an inverter and a system of make-up allows -. A new pressure with a transducer presses the device to be built into the existing cam-controlled, rigidly heavy and medium-sized machine models repaired on the same shaft with the blocks, since the machine itself will be set to reduce the pump power. Special

only the hydraulic cylinder is cast, the conversion value of these advantages is ikkug npti

The pressure transmitter and the blocks attached to the device on precision

on the same axis with the cam. Pump set-flocks.

Claims (1)

DEVICE FOR STABILIZING A VERTICALLY MOVING UNIT connected to a power mechanism by means of flexible couplings and guide blocks, which is torn with the fact that, with a chain for reducing dimensions when used in heavy and medium-sized machines and increasing accuracy of movement, it is equipped with a cam rigidly fixed to the block, and the power mechanism is made in the form of a hydraulic cylinder, a pneumatic accumulator and a pressure transducer, and the rod shaft is connected to: m pressure transducer controlled by a cam and connected by its input channel to the pump introduced into the device. 1Q50813 ’