Improved hydraulic control oil circuit system for rotary table of numerical control machine tool

Abstract

This utility model discloses an improved hydraulic control circuit system for supporting a CNC machine tool rotary table, including a motor pump unit, an overflow valve assembly, a filter, and at least one solenoid ball valve. The overflow valve assembly includes: a pilot-operated overflow valve, whose inlet is connected to the oil supply pipeline between the motor pump unit and the filter, and whose return port is connected to the return port of the hydraulic oil tank; a solenoid directional valve, whose inlet is connected to the control port of the pilot-operated overflow valve, and whose return port is connected to the return port of the hydraulic oil tank; a first direct-acting overflow valve, whose inlet is connected to the first working port of the solenoid directional valve, and whose return port is connected to the return port of the hydraulic oil tank; and a second direct-acting overflow valve, whose inlet is connected to the second working port of the solenoid directional valve, and whose return port is connected to the return port of the hydraulic oil tank. This utility model can remotely adjust the pressure in multiple stages for workpieces of different weights without requiring manual adjustment.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to an improved hydraulic control oil circuit system for CNC machine tool turntable support. Background Technology

[0002] The hydraulic control system for supporting the rotary table of a CNC machine tool supplies oil through an oil pump, which, via control components such as overflow valves and directional valves, drives the hydraulic cylinders to support the rotary table, achieving stable clamping and releasing, and ensuring machining accuracy and smooth operation.

[0003] See Figure 1 The existing hydraulic control circuit system for the rotary table support of a CNC machine tool includes a motor-pump unit 10, a direct-acting relief valve 20, a filter 30, and solenoid ball valves 40a and 40b. The motor-pump unit 10 draws oil from the oil tank and outputs hydraulic oil to the hydraulic actuator through the filter 30 and solenoid ball valves 40a and 40b. The hydraulic control circuit system for the rotary table support of the CNC machine tool regulates the system pressure through the direct-acting relief valve 20. However, in actual use, the load generated by workpieces of different weights is different, meaning the required system pressure is also different. This necessitates manual adjustment of the direct-acting relief valve 20 to achieve different system pressures to meet the processing requirements of workpieces of different weights. However, this pressure adjustment method requires manual operation, which is very inconvenient and involves a large amount of work.

[0004] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an improved hydraulic control oil circuit system for CNC machine tool turntable support that is convenient for pressure adjustment and reduces workload, in order to address the shortcomings of the existing technology.

[0006] The technical problem to be solved by this utility model can be achieved by the following technical solution: An improved hydraulic control circuit system for supporting a CNC machine tool rotary table includes a motor pump unit, an overflow valve assembly, a filter, and at least one solenoid ball valve. The oil inlet of the motor pump unit is connected to the oil outlet of a hydraulic oil tank, and its oil outlet is connected to the filter inlet of the filter. The filter outlet is connected to the oil inlet of each solenoid ball valve, and the oil outlet of each solenoid ball valve is connected to the oil inlet of the corresponding hydraulic actuator. The overflow valve assembly is installed on the oil supply pipeline between the motor pump unit and the filter. The overflow valve assembly includes: A pilot-operated relief valve has an oil inlet, an oil return port, and a control oil port. Its oil inlet is connected to the oil supply pipeline between the motor pump unit and the filter, and its oil return port is connected to the oil return port of the hydraulic oil tank. The electromagnetic directional valve has an oil inlet, an oil return port, a first working oil port, and a second working oil port. Its oil inlet is connected to the control oil port of the pilot-operated relief valve, and its oil return port is connected to the oil return port of the hydraulic oil tank. A first direct-acting relief valve, having an inlet and a return port, wherein the inlet is connected to the first working port of the solenoid directional valve, and the return port is connected to the return port of the hydraulic oil tank; and The second direct-acting relief valve has an oil inlet and an oil return port. Its oil inlet is connected to the second working oil port of the solenoid directional valve, and its oil return port is connected to the oil return port of the hydraulic tank.

[0007] In a preferred embodiment of this utility model, the overflow pressures of the pilot-operated relief valve, the first direct-acting relief valve, and the second direct-acting relief valve are different.

[0008] In a preferred embodiment of the present invention, a first check valve is further included. The first check valve is installed on the oil supply pipeline between the motor pump unit and the filter and is located between the oil outlet of the motor pump unit and the oil inlet of the pilot-operated relief valve.

[0009] In a preferred embodiment of the present invention, a second check valve is further included, which is installed on the oil pipeline between the filter and the solenoid ball valve.

[0010] In a preferred embodiment of the present invention, a single-point pressure measuring component is further included. The single-point pressure measuring component includes a pressure measuring oil supply pipe, a third one-way valve, and a pressure gauge. One end of the pressure measuring oil supply pipe is connected to the oil supply line between the filter and the solenoid ball valve, and the other end is connected to the pressure gauge. The third one-way valve is installed on the pressure measuring oil supply pipe.

[0011] In a preferred embodiment of the present invention, a pressure sensor is further included, which is installed on the oil pipeline between the filter and the solenoid ball valve.

[0012] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model can remotely adjust the pressure in multiple levels for workpieces of different weights without the need for manual adjustment, making the operation more convenient and reducing the workload. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the existing hydraulic control circuit system for supporting the rotary table of a CNC machine tool.

[0015] Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0017] See Figure 2 The figure shows an improved hydraulic control circuit system for the turntable support of a CNC machine tool, including a motor pump unit 100, an overflow valve assembly 200, a filter 300, and solenoid ball valves 400a and 400b.

[0018] The inlet of the motor pump unit 100 is connected to the outlet of the hydraulic oil tank (not shown in the figure), and its outlet is connected to the filter inlet of the filter 300. The filter outlet of the filter 300 is connected to the inlets of the solenoid ball valves 400a and 400b, respectively. The solenoid ball valves 400a and 400b are connected to the inlets of the corresponding hydraulic actuators (not shown in the figure). Of course, the number of solenoid ball valves is not limited to that in this embodiment, and should be set according to actual needs.

[0019] The relief valve assembly 200 is installed on the oil supply line between the motor pump unit 100 and the filter 300. The relief valve assembly 200 includes a pilot-operated relief valve 210, a solenoid directional valve 220, and direct-acting relief valves 230a and 230b.

[0020] Pilot-operated relief valve 210 has an inlet port P, a return port T, and a control port X. Its inlet port P is connected to the oil supply pipeline between the motor pump unit 100 and the filter 300, and its return port T is connected to the return port of the hydraulic oil tank. Solenoid directional valve 220 has an inlet port P, a return port T, and working ports A and B. Its inlet port P is connected to the control port X of pilot-operated relief valve 210, and its return port T is connected to the return port of the hydraulic oil tank. Direct-acting relief valve 230a has an inlet port P and a return port T. Its inlet port P is connected to the working port A of solenoid directional valve 220, and its return port T is connected to the return port of the hydraulic oil tank. Direct-acting relief valve 230b has an inlet port P and a return port T. Its inlet port P is connected to the working port B of solenoid directional valve 220, and its return port T is connected to the return port of the hydraulic oil tank.

[0021] The relief pressures of the pilot-operated relief valve 210, the direct-acting relief valve 230a, and the direct-acting relief valve 230b are different. For example, the relief pressure of the pilot-operated relief valve 210 can be set to 13 MPa, the relief pressure of the direct-acting relief valve 230a can be set to 10 MPa, and the relief pressure of the direct-acting relief valve 230b can be set to 8 MPa. When supporting a heavy workpiece, neither of the electromagnets at both ends of the solenoid directional valve 220 is energized, and the solenoid directional valve 220 is in the neutral position. The system pressure is set by the pilot-operated relief valve 210. When supporting a medium-weight workpiece, electromagnet b of the solenoid directional valve 220 is energized, and the solenoid directional valve 220 is in the right position. The system pressure is set by the direct-acting relief valve 230a. When supporting a light-weight workpiece, electromagnet a of the solenoid directional valve 220 is energized, and the solenoid directional valve 220 is in the left position. The system pressure is set by the direct-acting relief valve 230b. This invention eliminates the need for manual adjustment of the relief valve for workpieces of different weights. Remote multi-stage pressure regulation can be achieved through electrical control of the solenoid directional valve 220, making operation more convenient and reducing workload.

[0022] The improved hydraulic control oil circuit system for the turntable support of this utility model also includes a one-way valve 500a. The one-way valve 500a is installed on the oil supply pipeline between the motor pump group 100 and the filter 300 and is located between the oil outlet of the motor pump group 100 and the oil inlet of the pilot-operated relief valve 210. It plays a one-way shut-off role and cuts off the oil supply pipeline in case of emergency to avoid damage to the system.

[0023] The improved hydraulic control oil circuit system for the turntable support of this utility model also includes a one-way valve 500b. The one-way valve 500b is installed on the oil supply line between the filter 300 and the solenoid ball valves 400a and 400b, and plays a one-way shut-off role. In case of emergency, the oil supply line is cut off to avoid damage to the system.

[0024] The improved hydraulic control system for the rotary table support of this CNC machine tool further includes a single-point pressure measurement component 600. The single-point pressure measurement component 600 includes a pressure measurement oil supply pipe 610, a one-way valve 620, and a pressure gauge 630. One end of the pressure measurement oil supply pipe 610 is connected to the oil supply line between the filter 300 and the solenoid ball valves 400a and 400b, and the other end is connected to the pressure gauge 630. The one-way valve 620 is installed on the pressure measurement oil supply pipe 610. When single-point pressure measurement is required, the one-way valve 620 is opened, and the pressure at the measurement point is obtained through the pressure gauge 630.

[0025] The improved hydraulic control oil circuit system for the turntable support of this utility model also includes a pressure sensor 700. The pressure sensor 700 is installed on the oil supply pipeline between the filter 300 and the solenoid ball valves 400a and 400b. It is used to collect the oil supply pressure on the oil supply pipeline in real time and feed it back to the system in a timely manner so that the operator can obtain the oil supply pressure in real time.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An improved hydraulic control circuit system for supporting a rotary table of a CNC machine tool, comprising a motor pump unit, an overflow valve assembly, a filter, and at least one solenoid ball valve, wherein the inlet of the motor pump unit is connected to the outlet of a hydraulic oil tank, and its outlet is connected to the filter inlet of the filter; the filter outlet is connected to the inlet of each solenoid ball valve, and the outlet of each solenoid ball valve is connected to the inlet of a corresponding hydraulic actuator; the overflow valve assembly is installed on the oil supply pipeline between the motor pump unit and the filter; characterized in that... The overflow valve assembly includes: A pilot-operated relief valve has an oil inlet, an oil return port, and a control oil port. Its oil inlet is connected to the oil supply pipeline between the motor pump unit and the filter, and its oil return port is connected to the oil return port of the hydraulic oil tank. The electromagnetic directional valve has an oil inlet, an oil return port, a first working oil port, and a second working oil port. Its oil inlet is connected to the control oil port of the pilot-operated relief valve, and its oil return port is connected to the oil return port of the hydraulic oil tank. A first direct-acting relief valve, having an inlet and a return port, wherein the inlet is connected to the first working port of the solenoid directional valve, and the return port is connected to the return port of the hydraulic oil tank; and The second direct-acting relief valve has an oil inlet and an oil return port. Its oil inlet is connected to the second working oil port of the solenoid directional valve, and its oil return port is connected to the oil return port of the hydraulic oil tank.

2. The improved hydraulic control circuit system for supporting the rotary table of a CNC machine tool as described in claim 1, characterized in that, The overflow pressures of the pilot-operated relief valve, the first direct-acting relief valve, and the second direct-acting relief valve are different.

3. The improved hydraulic control circuit system for supporting the rotary table of a CNC machine tool as described in claim 1, characterized in that, It also includes a first check valve, which is installed on the oil supply pipeline between the motor pump unit and the filter and is located between the oil outlet of the motor pump unit and the oil inlet of the pilot-operated relief valve.

4. The improved hydraulic control circuit system for supporting the rotary table of a CNC machine tool as described in claim 3, characterized in that, It also includes a second check valve, which is installed on the oil supply line between the filter and the solenoid ball valve.

5. The improved hydraulic control circuit system for supporting the rotary table of a CNC machine tool as described in any one of claims 1 to 4, characterized in that, It also includes a single-point pressure measurement component, which includes a pressure measurement oil supply pipe, a third one-way valve and a pressure gauge. One end of the pressure measurement oil supply pipe is connected to the oil supply line between the filter and the solenoid ball valve, and the other end is connected to the pressure gauge. The third one-way valve is installed on the pressure measurement oil supply pipe.

6. The improved hydraulic control circuit system for supporting the rotary table of a CNC machine tool as described in claim 5, characterized in that, It also includes a pressure sensor, which is installed on the oil supply line between the filter and the solenoid ball valve.

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