CN-122014694-A - Hydraulic control system for self-adaptive workpiece deformation of large-scale processing device and control method thereof

CN122014694ACN 122014694 ACN122014694 ACN 122014694ACN-122014694-A

Abstract

The invention provides a hydraulic control system for self-adapting workpiece deformation of a large-scale processing device and a control method thereof, relating to the technical field of ship workpiece processing, and comprising an oil supply pipeline communicated with an oil inlet of a proportional pressure reducing valve, and an oil return port communicated with an oil return pipeline; one branch of the working oil port is sequentially communicated with a first speed regulating valve and a first normally-closed electromagnetic ball valve, the first normally-closed electromagnetic ball valve is connected with an oil port of a supporting hydraulic cylinder, the supporting hydraulic cylinder is sequentially provided with a second normally-closed electromagnetic ball valve and a second speed regulating valve along the return direction of hydraulic oil, the second speed regulating valve is connected with an oil return port of a proportional pressure reducing valve, the other branch of the proportional pressure reducing valve is communicated with a third normally-closed electromagnetic ball valve, an oil outlet of the third normally-closed electromagnetic ball valve is respectively communicated with an energy accumulator and a normally-open electromagnetic ball valve, and the normally-open electromagnetic ball valve is communicated with an oil outlet of the first normally-closed electromagnetic ball valve.

Inventors

ZHANG QIANG
FANG JINHUI
WEI RAN
LAI ZHENYU
FANG XIANG
FENG RUILIN

Assignees

杭州德泰电液系统工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. The hydraulic control system for the self-adaptive workpiece deformation of the large-scale processing device is characterized by comprising a proportional pressure reducing valve (1), a first speed regulating valve (2), a first normally-closed electromagnetic ball valve (3), a second normally-closed electromagnetic ball valve (4), a second speed regulating valve (5), a third normally-closed electromagnetic ball valve (6), a normally-open electromagnetic ball valve (7), an energy accumulator (8) and a supporting hydraulic cylinder (9); The oil supply pipeline is communicated with an oil inlet of the proportional pressure reducing valve (1), an oil return port of the proportional pressure reducing valve (1) is communicated with the oil return pipeline, one branch of a working oil port of the proportional pressure reducing valve (1) is sequentially communicated with the first speed regulating valve (2) and the first normally closed electromagnetic ball valve (3), the first normally closed electromagnetic ball valve (3) is connected with an oil port of the supporting hydraulic cylinder (9), the supporting hydraulic cylinder (9) is sequentially provided with the second normally closed electromagnetic ball valve (4) and the second speed regulating valve (5) along the return direction of hydraulic oil, and the second speed regulating valve (5) is connected with the oil return port of the proportional pressure reducing valve (1); The other branch of the proportional pressure reducing valve (1) is communicated with the third normally-closed electromagnetic ball valve (6), an oil outlet of the third normally-closed electromagnetic ball valve (6) is respectively communicated with the energy accumulator (8) and the normally-open electromagnetic ball valve (7), and the normally-open electromagnetic ball valve (7) is communicated with an oil outlet of the first normally-closed electromagnetic ball valve (3).
2. The hydraulic control system of claim 1, wherein, The oil outlet of the first normally-closed electromagnetic ball valve (3) is also connected with a safety valve (10), the safety valve (10) is arranged in parallel with the second normally-closed electromagnetic ball valve (4), and the outlet of the safety valve (10) is connected with the oil return port of the proportional pressure reducing valve (1).
3. The hydraulic control system of claim 2, wherein, The set value of the opening pressure of the safety valve (10) is 1.2-1.5 times higher than the rated working pressure of the supporting hydraulic cylinder (9).
4. The hydraulic control system of claim 1, wherein, The device also comprises a first pressure sensor (11) and a second pressure sensor (12); The first pressure sensor (11) is communicated with the supporting hydraulic cylinder (9) through a pressure interface, and the second pressure sensor (12) is communicated with the energy accumulator (8) through a pressure interface.
5. The hydraulic control system of claim 1, wherein, The hydraulic cylinder further comprises a displacement sensor (13), wherein the displacement sensor (13) is assembled at the end part of the cylinder barrel of the supporting hydraulic cylinder (9) and is used for acquiring piston displacement data of the supporting hydraulic cylinder (9) in real time.
6. The hydraulic control system of claim 5, wherein, The displacement sensor (13) is a built-in hysteresis telescopic displacement sensor, detection rods of the displacement sensor (13) are arranged along the axial direction of the supporting hydraulic cylinder (9), and magnetic rings matched with the detection rods of the displacement sensor (13) are fixedly connected with a piston of the supporting hydraulic cylinder (9); the displacement sensor (13) is connected with a PLC control system through signals.
7. The hydraulic control system of claim 2, wherein, The proportional pressure reducing valve (1), the first speed regulating valve (2), the first normally-closed electromagnetic ball valve (3), the second normally-closed electromagnetic ball valve (4), the second speed regulating valve (5), the third normally-closed electromagnetic ball valve (6), the normally-open electromagnetic ball valve (7), the safety valve (10) and the energy accumulator (8) are integrally arranged on a bracket, and the bracket is fixed on the side part of a mechanical frame (14) of the large-scale processing device.
8. The hydraulic control system of claim 7, wherein, The supporting hydraulic cylinder (9) is arranged at the bottom of the mechanical frame (14); The end of a piston rod of the supporting hydraulic cylinder (9) is provided with a ball head (15), and the ball head (15) is in clearance fit with an inner spherical surface interface on the movable gesture adjusting device and is used for universal butt joint of the supporting hydraulic cylinder (9) and the movable gesture adjusting device.
9. A hydraulic control method for self-adapting deformation of a workpiece of a large processing device, characterized in that the method uses the hydraulic control system according to any one of claims 1-8, comprising the following steps: Step 1, starting hydraulic pressure, controlling the normally-open electromagnetic ball valve (7) to be electrified, entering a rigid supporting mode, driving the supporting hydraulic cylinder (9) to stretch and retract through the first normally-closed electromagnetic ball valve (3), the second normally-closed electromagnetic ball valve (4) and the corresponding first speed regulating valve (2) and second speed regulating valve (5), and carrying out gesture-adjusting butt joint on a processing device and a workpiece; Step 2, preshooting the pressure of the energy accumulator (8) to be similar to the pressure difference of the supporting hydraulic cylinder (9) through the proportional pressure reducing valve (1) and the third normally-closed electromagnetic ball valve (6), switching the normally-open electromagnetic ball valve (7) and the third normally-closed electromagnetic ball valve (6) into a flexible supporting mode, and starting processing; And 3, during processing, the supporting hydraulic cylinder (9) is self-adaptive to workpiece deformation, the energy accumulator (8) compensates pressure fluctuation, and the normally open electromagnetic ball valve (7) is controlled to be powered after the processing is finished, and the rigid supporting mode is switched back.
10. The method of controlling a liquid according to claim 9, wherein, In step 2, the pressure difference between the accumulator (8) and the supporting hydraulic cylinder (9) is not more than 0.5MPa.

Description

Hydraulic control system for self-adaptive workpiece deformation of large-scale processing device and control method thereof Technical Field The invention relates to the technical field of ship workpiece machining, in particular to a hydraulic control system for self-adaptive workpiece deformation of a large machining device and a control method thereof. Background The ship structure is also called a hull structure and comprises a ship bottom, a ship side, a deck, a bulkhead, a head and tail building and an upper building, wherein the ship structure is divided into a plurality of sections such as a ship bow, a ship stern, a ship middle body and the like along the length direction of the ship body in the construction process. When the stern is machined, the inner surface and the outer surface of the large-sized workpiece of the stern of the ship are required to be machined under the condition that the stern of the ship is not moved. The existing large workpiece processing device is mainly divided into outer surface processing and inner surface processing. The title is a large-scale workpiece inner surface machining device, (China patent with application number 202510550883.1) which comprises a fixed frame, a rotating frame, a rotary driving mechanism and a cutting mechanism, wherein the fixed frame is sleeved outside a workpiece to be machined to realize positioning, the rotary driving mechanism drives the rotating frame to do circular motion around the workpiece so as to drive the cutting mechanism to finish outer surface machining, and the title is a large-scale workpiece inner surface machining device, (China patent with application number 202510550880.8) which comprises a fixed seat, a driving mechanism and the cutting mechanism, the fixed seat is arranged at the end part of the workpiece, and the driving mechanism can push the cutting mechanism to extend into the workpiece and move along the inner surface to realize inner surface cutting. However, in the processing stage, the two processing devices lack the capability of adaptively adjusting along with the deformation of the workpiece, and cannot respond to the dynamic deformation of the workpiece in real time, so that the relative positions of the processing devices and the workpiece are difficult to keep stable, and further, the phenomena of foot tilting and displacement of a large-sized workpiece (a stern section) occur, which affects the processing precision of the workpiece. Disclosure of Invention The invention aims to provide a hydraulic control system for self-adapting workpiece deformation of a large-scale processing device and a control method thereof, which are used for solving the technical problem that the relative positions of the processing device and the workpiece cannot be kept stable because the dynamic deformation of the workpiece cannot be responded in real time in the prior art. The invention provides a hydraulic control system for self-adapting workpiece deformation of a large-scale processing device, which comprises a proportional pressure reducing valve, a first speed regulating valve, a first normally-closed electromagnetic ball valve, a second speed regulating valve, a third normally-closed electromagnetic ball valve, a normally-open electromagnetic ball valve, an energy accumulator and a supporting hydraulic cylinder, wherein the proportional pressure reducing valve is connected with the first speed regulating valve; The hydraulic oil return device comprises a proportional pressure reducing valve, an oil supply pipeline, a first normally closed electromagnetic ball valve, a second normally closed electromagnetic ball valve, a first hydraulic oil return valve and a second hydraulic oil return valve, wherein the oil supply pipeline is communicated with an oil inlet of the proportional pressure reducing valve; The other branch of the proportional pressure reducing valve is communicated with a third normally-closed electromagnetic ball valve, an oil outlet of the third normally-closed electromagnetic ball valve is respectively communicated with the energy accumulator and the normally-open electromagnetic ball valve, and the normally-open electromagnetic ball valve is communicated with an oil outlet of the first normally-closed electromagnetic ball valve. Further, the oil outlet of the first normally-closed electromagnetic ball valve is also connected with a safety valve, the safety valve and the second normally-closed electromagnetic ball valve are arranged in parallel, and the outlet of the safety valve is connected with the oil return port of the proportional pressure reducing valve. Further, the opening pressure set value of the safety valve is 1.2-1.5 times higher than the rated working pressure of the supporting hydraulic cylinder. Further, the device also comprises a first pressure sensor and a second pressure sensor; the first pressure sensor is communicated with the supporting hydraulic cylinder through a pressure interfac