SU1041276A1 - Hydraulic drive of a device for atomatic infeed for circular grinder - Google Patents

Abstract

HYDRAULIC BENEFITS and an adjustable choke, mounted between the cavity and the reversing valve, characterized by That is, in order to increase the processing accuracy in the mode. nursing by providing pulsators for feeding the grinding wheel, the hydraulic actuator is equipped with a proportional valve with a check valve, which are connected to a non-shock-free hydraulic cavity and a reversible valve, an additional valve is made of a three-position four and one-line valve, one of which lines (L soytseka with a proportional valve inlet).

Description

The invention relates to the regulation and control of dimensions in the machining industry and can be applied on round grinding oval machines that do not have automatic cross feed went}) to the circle.

Closest to the invention is the hydraulic drive of the automatic insertion device to a circular grinding machine, which contains a hydraulic cylinder that supplies grinding wheel with a rod and rodless cavity, a pump in fluid line with a hydraulic cylinder through a reversing valve, a throttle with a check valve installed in a hydraulic line, communicating with it; without rods, then the cavity is hydrocylin .. with a reversible distributor, an additional distributor and an adjustable choke, installed in the rod cavity, hydraulic cylinder and reversivnm distributor t.

The disadvantage of this hydrosurgery is the need for a large one) during the process of nursing remching, which cuts the accuracy of processing.

The purpose of the invention is to increase the accuracy of processing in the nursing process by providing a pulsating feed of the grinding wheel.

This goal is achieved by the fact that the hydraulic drive of the automatic embedding device to a circular grinding machine is equipped with a proportional valve with a non-return valve connected between the stemless recess and the reversing distributor, the additional valve with three-position four-way valve, one of the lines, has a set of 10-meter valve.

The drawing shows the hydraulic drive of the automatic insertion device for a round spindle | oval machine.

The hydraulic actuator contains pshropilindr 1 with rod 2 and rodless 3 cavities, pump 4, communicated with the cavity of the hydraulic cylinder 1 through a reversible distributor 5, throttle 6 with a check valve 7, installed in gtszroIIII 8, communicating the rodless cavity 3 of the hydraulic cylinder 1 with a reversible distributor . Lylem 5, additional valve 9, made three-way four-line, installed between the rod cavity 2 g androtsilitsra I and reversible marsh-upeggepem 5, reguperable throttle Yu and valve And proportionality with non-return valve 12, vkg-proportional to the full bore cavity

3 hydrocyliidra 1 and reversing distributor 5.

The rod 13 of the hydraulic cylinder 1 is rigidly connected to the toothed rack 14 for transmitting torque from the gear 15 to the wheel of the grinding headstock (not shown). The distributor 9 communicates with the distributor 5 and 16 lines 17,

Main drive works as follows.

When turning the arms, distribute 5 to the working position (shown in the diagram) the oil from the pump 4 flows through valve 11 and throttle 6 into the rodless cavity 3 of the hydraulic cylinder 1.

After the accelerated grinding of the wheel to the product, the grinding headstock is first in the finishing feed mode, the value of which is set by adjusting the POWER UNIT 6. When the product reaches the specified size (taking into account the nursing allowance), the active control command (not shown) issues the Shrinkage mode on the distributor 9, the Rod cavity 2 of the hydrocyliidra I is connected to the hydraulic axis 17 by the position of the distributor 9 (shown in the diagram). There is an instantaneous deceleration of the rod 13 of the hydraulic cylinder 1 and, smoothly, the termination of the automatic feeding of the grinding wheel.

When the device reaches the final size of the device, it is active Kyktrol, gives a command to finish the treatment. The reversing valve 5 is switched, the direction of flow of the oil in the lines of the device is reversed. The valve 9 is switched, the position 11 is connected to the rod cavity 2 of the hydraulic ring I. The oil under pressure flows through the valve 5 and the valve 9 into the rod cavity

2gtsrotsipivdra I. From the rodless cavity

3d cylinder cylinder 1 maspo through check valves 7 and 12, valve 5 is fed to the drain. The rod 13 of the hydraulic head 1 returns to the initial position.

Kapapen 11 propionation allows to exclude the influence of the difference of affective n with piston stages on the braking condition, since

-; r- const.

where 4

pressure at the valve inlet;

P davpeshda at the valve outlet.

Claims (1)

HYDRAULIC DRIVE OF AUTOMATIC CUTTING DEVICE TO A ROUND GRINDING MACHINE, with a hydraulic cylinder for supplying a grinding wheel with drain and rodless cavities, a pump in communication with hydraulic cylinder cavities through a reversing valve, an additional throttle valve with a non-return valve installed in the hydraulic control valve throttle installed between the rod cavity of the hydraulic cylinder and the reversing valve, characterized in we have that, in order to increase the accuracy of processing in the mode. nursing by providing a pulsating feed of the grinding wheel, the hydraulic actuator is equipped with a proportional valve with a check valve, included between the rodless cavity of the hydraulic cylinder and a reversing valve, the additional valve is made of three-position four-line §, one of the lines of which is connected to the input of the proportional valve. SU „„ 1041276