Hydraulic control system for quickly pressing circuit board

Abstract

The utility model relates to the field of hydraulic control systems, and discloses a hydraulic control system for quickly pressing a circuit board, which comprises a hydraulic oil tank, a hydraulic oil cylinder, a rotating motor, a double pump system, a main oil supply pipeline and a plurality of hydraulic connecting pipes connected with the hydraulic pipeline, the main oil supply pipeline comprises a first one-way valve module, a second one-way valve module and a reversing valve; an oil inlet of the double pump system is connected with the hydraulic oil tank, an oil outlet of the double pump system is sequentially connected with the first one-way valve module, the reversing valve and the second one-way valve module through hydraulic connecting pipes and then connected to a rodless cavity of the hydraulic oil cylinder, and an oil outlet of a rod cavity of the hydraulic oil cylinder passes through the reversing valve and then is connected with the hydraulic oil tank to form a main oil supply pipeline. By arranging the duplex pump system, the pressure of the hydraulic oil circuit is accurately controlled through the up-down rapid movement of the high-flow low-pressure pump, the pressurization of the low-flow high-pressure pump and the overpressure and pressure relief module, so that the control of the pressing speed and the pressure of the circuit board is considered, and the pressing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydraulic control system more particularly, relate to a kind of for the hydraulic control system of fast pressing circuit board. BACKGROUND

[0002] In the modern industrial manufacturing field, the assembly and processing process of electronic circuit board, usually need to press the operation to circuit board, to ensure that its internal layer structure is closely attached and stability. With the continuous miniaturization and high integration of electronic equipment, the quality requirement of circuit board pressing process is also increasingly improved. Specifically, during pressing process, the uniform stress between each layer of circuit board needs to be realized, while avoiding the misplacement or damage of interlayer due to uneven or excessive pressure. Therefore, as the core power device of pressing equipment, the performance of hydraulic system directly affects the pressing quality of electronic circuit board.

[0003] The main role of hydraulic system in pressing process is to provide driving force for hydraulic cylinder, to drive cylinder piston to complete the specified pressing action. This process usually requires that the hydraulic system has high efficiency, precision and reliability, which can meet the pressing working condition of small stroke, high frequency and high precision. However, traditional hydraulic system has exposed a series of problems in long-term use, especially in efficiency, pressure control accuracy and energy saving, there are obvious deficiencies. These problems are particularly prominent in the working condition requiring fast action and accurate pressure control, which limits the wide application of hydraulic system.

[0004] At present, the common hydraulic pressing system usually adopts the design of single pump source oil supply. Although this structure is simple, it has at least the following obvious limitations in meeting the actual working condition demand: the action speed and pressure demand are difficult to balance, and the single pump source design is difficult to meet the two demands of fast movement and high pressure pressing. In the pressing process, the cylinder needs to be quickly extended and retracted to improve the pressing efficiency; at the same time, high pressure oil needs to be provided in the pressing process to ensure the accurate output of pressing force. However, although the traditional low pressure large flow low pressure pump can provide higher flow to realize fast movement, its pressure output is often insufficient, which cannot meet the demand of high pressure working condition. While the high pressure small flow pump can provide enough pressure, but due to the low flow, the cylinder action is slow, which seriously affects the production efficiency. Traditional hydraulic system usually relies on single overflow valve to adjust system pressure, but the pressure adjustment range of this design is narrow, and it is difficult to realize accurate control of pressure due to the limitation of simple hydraulic circuit structure. Traditional hydraulic system usually adopts fixed flow or pressure design, which cannot flexibly adjust power output under different working conditions, resulting in high energy consumption. UTILITY MODEL CONTENTS

[0005] The utility model discloses a hydraulic control system for fast pressing circuit board to overcome the design difficulty of single pump source of prior art to meet the two needs of fast movement and high pressure pressurization simultaneously, provide a kind of for fast pressing circuit board's hydraulic control system.

[0006] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0007] A kind of for fast pressing circuit board's hydraulic control system, including hydraulic oil tank, including hydraulic cylinder, rotating motor, double pump system, main oil supply pipeline and the several hydraulic connection pipes of connecting hydraulic pipeline;

[0008] The main oil supply pipeline includes first check valve module, second check valve module and reversing valve;

[0009] The power output end of the rotating motor is connected with the transmission input end of the double pump system by the shaft coupling;The oil inlet of the double pump system is connected with the hydraulic oil tank, and the oil outlet of the double pump passes through the first check valve module, the reversing valve and the second check valve module in sequence and is connected with the rodless cavity of the hydraulic cylinder, and the oil outlet of the rod cavity of the hydraulic cylinder is connected with the hydraulic oil tank through the reversing valve and constitutes the main oil supply pipeline.

[0010] Further, the double pump system includes a first hydraulic pump and a second hydraulic pump;The first hydraulic pump is connected with the second hydraulic pump in parallel.

[0011] Further, the first check valve module includes a first check valve and a second check valve, and the oil inlet of the first check valve is connected with the oil outlet of the first hydraulic pump;The oil inlet of the second check valve is connected with the oil outlet of the second hydraulic pump.

[0012] Further, the first hydraulic pump is a large-flow low-pressure pump, and the second hydraulic pump is a low-flow high-pressure pump.

[0013] Further, a first overflow module is arranged between the connection oil circuit of the first hydraulic pump and the first check valve;The first overflow module includes a pilot overflow valve and an electromagnetic reversing valve for controlling the on-off of the pilot overflow valve.

[0014] Further, a second overflow module is arranged between the connection oil circuit of the second hydraulic pump and the second check valve, and the second overflow module is an overflow valve, which is arranged between the second hydraulic pump and the oil return circuit as an overflow branch for controlling the pressure of the oil circuit.

[0015] Further, the oil inlet of the rodless cavity is also connected with an overpressure relief module for reducing the internal pressure of the rodless cavity;

[0016] The overpressure relief module is composed of a throttle valve and an electromagnetic check valve, one end of the throttle valve is connected with the rodless cavity, the other end is connected with a valve port of the electromagnetic check valve through a hydraulic connection pipe, and the other valve port of the electromagnetic check valve is connected with the hydraulic oil tank.

[0017] Further, the hydraulic rod stroke at one end of the rod cavity is less than 50mm.

[0018] Further, the hydraulic monitoring module is arranged between the first check valve module and the reversing valve and between the second check valve module and the rodless cavity, the hydraulic monitoring module comprises a pressure sensor for detecting the pressure of the hydraulic oil circuit, a pressure gauge and a pressure gauge switch for controlling the opening and closing of the pressure.

[0019] Further, the reversing valve is a three-position four-way electromagnetic reversing valve, the second check valve module is a hydraulic control check valve, and the hydraulic oil tank is further provided with a liquid level meter for marking the internal liquid level.

[0020] Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

[0021] The utility model relates to the field of hydraulic control system, a kind of hydraulic control system for fast pressing circuit board is designed in the utility model, including hydraulic oil tank, including hydraulic cylinder, rotating motor, double pump system, main oil supply pipeline and several hydraulic connection pipes of connection hydraulic circuit;Through the setting double pump system, after high-flow low-pressure pump fast motion up and down, low-flow high-pressure pump pressurization and the pressure of the hydraulic oil circuit is realized accurate control by overpressure relief module.

[0022] (1) action speed and pressure are considered, and the pressing efficiency is improved.The system adopts double pump design, wherein the first hydraulic pump (high-flow low-pressure pump) provides high-flow hydraulic oil required for fast movement, and the second hydraulic pump (low-flow high-pressure pump) provides stable pressure required for high-pressure pressurization stage, and seamless switching of the whole process of fast extension, accurate pressurization and fast retraction can be realized by parallel operation and combined flow of the two pumps, so that the comprehensive working efficiency of the system is effectively improved.

[0023] (2) overpressure relief design enhances system safety.Rodless cavity is provided with overpressure relief module (composed of throttle valve and electromagnetic check valve), and if the pressure of rodless cavity exceeds the set value during pressing process, the system can quickly relieve pressure, and the excess pressure is discharged to the oil tank, to ensure that the internal pressure of hydraulic cylinder is stable.This design not only protects the core components of the hydraulic system, but also reduces the risk of damage to the circuit board due to overpressure, and improves the reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the hydraulic principle drawing of the hydraulic control system for fast pressing circuit board in the utility model embodiment.

[0025] Figure 2 It is a schematic view of duplex pump system in the embodiment of the utility model;

[0026] Figure 3 It is a schematic view of first overflow module in the embodiment of the utility model;

[0027] Figure 4 It is a schematic view of hydraulic monitoring module in the embodiment of the utility model;

[0028] Figure 5 It is a schematic view of overpressure relief module in the embodiment of the utility model;

[0029] 1, hydraulic cylinder; 101, rodless cavity; 102, rod cavity;

[0030] 2, rotary motor; 3, duplex pump system; 301, first hydraulic pump; 302, second hydraulic pump;

[0031] 4, main oil supply pipeline; 401, first check valve module; 4011, first check valve; 4012, second check valve; 402, second check valve module; 403, reversing valve;

[0032] 5, hydraulic oil tank; 6, first overflow module; 601, pilot operated overflow valve; 602, electromagnetic reversing valve;

[0033] 7, hydraulic monitoring module; 701, pressure sensor; 702, pressure gauge; 703, pressure gauge switch;

[0034] 8, overpressure relief module; 801, throttle valve; 802, electromagnetic check valve; 9, second overflow module. DETAILED DESCRIPTION

[0035] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0036] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms are not intended to denote any order, quantity, or importance, but are used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0037] Embodiment 1

[0038] The embodiment discloses a hydraulic control system for rapid pressing of a circuit board, comprising a hydraulic oil tank 5, a hydraulic cylinder 1, a rotary motor 2, a duplex pump system 3, a main oil supply pipeline 4, and a plurality of hydraulic connection pipes connected to the hydraulic pipeline; the main oil supply pipeline 4 comprises a first one-way valve module 401, a second one-way valve module 402, and a reversing valve 403; the power output end of the rotary motor 2 is connected to the transmission input end of the duplex pump system 3 through a shaft coupling;

[0039] The oil inlet of the duplex pump system 3 is connected to the hydraulic oil tank 5, the oil outlet of the duplex pump is connected to the first one-way valve module 401, the reversing valve 403, and the second one-way valve module 402 in sequence through the hydraulic connection pipe, and then connected to the rodless cavity 101 of the hydraulic cylinder 1, the oil outlet of the rod cavity 101 of the hydraulic cylinder 1 is connected to the hydraulic oil tank 5 through the reversing valve 403 to form the main oil supply pipeline 4. One side of the hydraulic oil tank 5 is also provided with a liquid level meter for marking the internal liquid level, and the hydraulic rod stroke of the rod cavity 102 is less than 50 mm.

[0040] The first one-way valve module 401 comprises a first one-way valve 4011 and a second one-way valve 4012, the oil inlet of the first one-way valve 4011 is connected to the oil outlet of the first hydraulic pump 301; the oil inlet of the second one-way valve 4012 is connected to the oil outlet of the second hydraulic pump 302. The reversing valve 403 is a three-position four-way electromagnetic reversing valve, and the second one-way valve module 402 is a hydraulic control one-way valve.

[0041] The duplex pump system 3 comprises a first hydraulic pump 301 and a second hydraulic pump 302; the first hydraulic pump 301 is connected in parallel with the second hydraulic pump 302. The first hydraulic pump 301 is a large-flow low-pressure pump, and the second hydraulic pump 302 is a low-flow high-pressure pump. A first overflow module 6 is arranged between the first hydraulic pump 301 and the first one-way valve 4011; the first overflow module 6 comprises a pilot overflow valve 601 and an electromagnetic reversing valve 602 for controlling the on-off of the pilot overflow valve 601.

[0042] In the specific fast extension working condition stage, the overflow valve at one end of the low-pressure large-flow first hydraulic pump 301 and the rotating motor 2 are powered, the rotating motor 2 drives the first hydraulic pump 301 and the second hydraulic pump 302 to work synchronously to provide a combined power source for the system, at this time, the pilot overflow valve 601 at the low-pressure pump side is in a closed state, so that the low-pressure large-flow first hydraulic pump 301 participates in oil supply, the reversing valve 403 is powered, the reversing valve 403 is switched to the working condition position of fast extension, the P port is communicated with the A port, and the T port is communicated with the B port to supply oil to the rodless cavity 101 of the hydraulic oil cylinder 1. The low-pressure oil and the high-pressure oil are combined to enter the A port of the reversing valve 403 through the first one-way valve 4011 and the second one-way valve 4012 respectively, enter the rodless cavity 101 of the hydraulic oil cylinder 1 through the normally open port of the second one-way valve module 402, and the rod cavity 102 of the hydraulic oil cylinder 1 is returned through the T port of the electromagnetic reversing valve 403.

[0043] Embodiment 2

[0044] The embodiment discloses another hydraulic control system for fast pressing a circuit board, comprising a hydraulic oil tank 5, a hydraulic oil cylinder 1, a rotating motor 2, a duplex pump system 3, a main oil supply pipeline 4, and a plurality of hydraulic connection pipes connected with the hydraulic pipeline; the main oil supply pipeline 4 comprises a first one-way valve module 401, a second one-way valve module 402, and a reversing valve 403; the power output end of the rotating motor 2 is connected with the transmission input end of the duplex pump system 3 through a shaft coupling;

[0045] The oil inlet of the duplex pump system 3 is connected with the hydraulic oil tank 5, the oil outlet of the duplex pump is connected with the first one-way valve module 401, the reversing valve 403, and the second one-way valve module 402 in sequence through the hydraulic connection pipe, and then connected with the rodless cavity 101 of the hydraulic oil cylinder 1, the oil outlet of the rod cavity 101 of the hydraulic oil cylinder 1 is connected with the hydraulic oil tank 5 after passing through the reversing valve 403 to form the main oil supply pipeline 4. One side of the hydraulic oil tank 5 is also provided with a liquid level meter for marking the internal liquid level, and the hydraulic rod stroke of the rod cavity 102 is less than 50 mm.

[0046] The first one-way valve module 401 comprises a first one-way valve 4011 and a second one-way valve 4012, the oil inlet of the first one-way valve 4011 is connected with the oil outlet of the first hydraulic pump 301, and the oil inlet of the second one-way valve 4012 is connected with the oil outlet of the second hydraulic pump 302. The hydraulic monitoring module 7 is arranged between the first one-way valve module 401 and the reversing valve 403 and between the second one-way valve module 402 and the rodless cavity 101, and the hydraulic monitoring module 7 comprises a pressure sensor 701 for detecting the pressure of the hydraulic oil circuit, a pressure gauge 702, and a pressure gauge switch 703 for controlling the opening and closing of the pressure.

[0047] The duplex pump system 3 comprises the first hydraulic pump 301 and the second hydraulic pump 302, and the first hydraulic pump 301 is connected with the second hydraulic pump 302 in parallel. The first hydraulic pump 301 is a large-flow low-pressure pump, and the second hydraulic pump 302 is a low-flow high-pressure pump. The first overflow module 6 is arranged between the first hydraulic pump 301 and the first one-way valve 4011, and the first overflow module 6 comprises a pilot overflow valve 601 and an electromagnetic reversing valve 602 for controlling the opening and closing of the pilot overflow valve 601. The second overflow module 9 is arranged between the second hydraulic pump 302 and the second one-way valve 4012, and the second overflow module 9 is an overflow valve arranged between the second hydraulic pump 302 and the oil return circuit as an overflow branch for controlling the pressure of the circuit.

[0048] In the specific pressurizing (work) working condition stage, one side of the reversing valve 403 and the rotating motor 2 are powered, the reversing valve 403 is switched to the pressurizing working condition position, the P port is communicated with the A port, and the T port is communicated with the B port, so as to supply oil to the rodless cavity 101 of the hydraulic oil cylinder 1. The low-pressure oil is directly unloaded through the pilot overflow valve 601 of the first overflow module 6, the high-pressure oil is adjusted in pressure through the overflow valve of the second overflow module 9, and then enters the P port of the reversing valve 403 through the second one-way valve 4012. At this time, the P port is communicated with the A port, the pressure oil enters the rodless cavity 101 of the hydraulic oil cylinder 1 through the A port, and the pressurizing is continued.

[0049] In the specific rapid retraction working condition stage, the electromagnetic reversing valve 602 in the first overflow module 6, one side of the switching oil circuit of the reversing valve 403 and the rotating motor 2 are powered, the reversing valve 403 is switched to the position of the rapid retraction working condition, at this time, the P port of the reversing valve 403 is communicated with the B port, and the T port is communicated with the A port. The low-pressure oil and the high-pressure oil are combined into the B port of the reversing valve 403 through the first one-way valve 4011 and the second one-way valve 4012 respectively, and then enter the inside of the rod cavity 102 of the hydraulic oil cylinder 5, in the process, the operator opens the second one-way valve module 402, that is, the hydraulic control one-way valve, and the rodless cavity 101 of the hydraulic oil cylinder 5 enters the T port of the reversing valve 403 (the electromagnetic reversing valve) through the opened second one-way valve module 402 (the hydraulic control one-way valve) for oil return.

[0050] Example 3

[0051] This embodiment discloses another hydraulic control system for rapid pressing of circuit boards, similar to embodiment 2, including a hydraulic oil tank 5, a hydraulic cylinder 1, a rotary motor 2, a dual pump system 3, a main oil supply line 4, and several hydraulic connecting pipes connecting the hydraulic lines; the main oil supply line 4 includes a first check valve module 401, a second check valve module 402, and a reversing valve 403; the power output end of the rotary motor 2 is connected to the transmission input end of the dual pump system 3 via a coupling;

[0052] The oil inlet of the dual pump system 3 is connected to the hydraulic oil tank 5. The oil outlet of the dual pump is connected to the first check valve module 401, the reversing valve 403 and the second check valve module 402 through the hydraulic connecting pipe, and then connected to the rodless chamber 101 of the hydraulic cylinder 1. The oil outlet of the rod chamber 101 of the hydraulic cylinder 1 is connected to the hydraulic oil tank 5 through the reversing valve 403 to form the main oil supply pipeline 4.

[0053] Hydraulic monitoring modules 7 are provided between the first check valve module 401 and the reversing valve 403, and between the second check valve module 402 and the rodless chamber 101. The hydraulic monitoring modules 7 include a pressure sensor 701 for detecting the pressure of the hydraulic oil circuit, a pressure gauge 702, and a pressure gauge switch 703 for controlling the opening and closing of the pressure.

[0054] One end of the oil inlet of the rodless chamber 101 is also connected to an overpressure relief module 8 for reducing the internal pressure of the rodless chamber 101; the overpressure relief module 8 consists of a throttle valve 801 and an electromagnetic check valve 802. One end of the throttle valve 801 is connected to the rodless chamber 101, and the other end is connected to the valve port of the electromagnetic check valve 802 through a hydraulic connecting pipe; the other valve port of the electromagnetic check valve 802 is connected to the hydraulic oil tank 5.

[0055] If the pressure after pressurization exceeds the required pressure during the pressurization stage, the pressure can be regulated by the overpressure relief module 8. When the pressure after pressurization is too high, the pressure value of the oil in the rodless chamber 101 can be monitored by the pressure sensor 701 of the hydraulic monitoring module 7 and observed by the pressure gauge 702. At this time, after the electromagnetic check valve 802 of the overpressure relief module 9 is energized, the pressure oil in the rodless chamber 101 flows back to the hydraulic oil tank 5 after passing through the throttle valve 801 and the electromagnetic check valve 802.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A hydraulic control system for rapid compression of a circuit board, comprising a hydraulic oil tank (5), characterized in that, The hydraulic cylinder (1), the rotary motor (2), the duplex pump system (3), the main oil supply pipeline (4) and a plurality of hydraulic connection pipes connected with the hydraulic pipeline are included. The main oil supply pipeline (4) includes a first one-way valve module (401), a second one-way valve module (402) and a reversing valve (403); the power output end of the rotary motor (2) is connected with the transmission input end of the duplex pump system (3) through a shaft coupling. The oil inlet of the duplex pump system (3) is connected with the hydraulic oil tank (5), the oil outlet of the duplex pump is connected with the first one-way valve module (401), the reversing valve (403) and the second one-way valve module (402) in sequence through the hydraulic connection pipe, and then connected with the rodless cavity (101) of the hydraulic cylinder (1); the oil outlet of the rod cavity (102) of the hydraulic cylinder (1) is connected with the hydraulic oil tank (5) through the reversing valve (403) to form the main oil supply pipeline (4).

2. The hydraulic control system for rapid compression of a circuit board according to claim 1, wherein, The duplex pump system (3) includes a first hydraulic pump (301) and a second hydraulic pump (302); the first hydraulic pump (301) is connected with the second hydraulic pump (302) in parallel.

3. The hydraulic control system for rapid compression of a circuit board according to claim 2, wherein, The first one-way valve module (401) includes a first one-way valve (4011) and a second one-way valve (4012); the oil inlet of the first one-way valve (4011) is connected with the oil outlet of the first hydraulic pump (301); the oil inlet of the second one-way valve (4012) is connected with the oil outlet of the second hydraulic pump (302).

4. The hydraulic control system for rapid compression of a circuit board according to claim 2, wherein The first hydraulic pump (301) is a large-flow low-pressure pump, and the second hydraulic pump (302) is a low-flow high-pressure pump.

5. The hydraulic control system for rapid compression of a circuit board according to claim 2, wherein, A first overflow module (6) is arranged between the connection oil circuit of the first hydraulic pump (301) and the first one-way valve (4011). The first overflow module (6) includes a pilot-operated overflow valve (601) and an electromagnetic reversing valve (602) for controlling the on-off of the pilot-operated overflow valve (601).

6. The hydraulic control system for rapid compression of a circuit board according to claim 2, wherein A second overflow module (9) is arranged between the connection oil circuit of the second hydraulic pump (302) and the second one-way valve (4012); the second overflow module (9) is an overflow valve, which is arranged between the second hydraulic pump (302) and an oil return pipeline as an overflow branch for controlling the pressure of the oil circuit.

7. The hydraulic control system for rapid compression of a circuit board according to claim 1, wherein An overpressure relief module (8) for reducing the internal pressure of the rodless cavity (101) is further connected to one end of the oil inlet of the rodless cavity (101). The overpressure relief module (8) is composed of a throttle valve (801) and an electromagnetic check valve (802); one end of the throttle valve (801) is connected with the rodless cavity (101), and the other end is connected with the valve port of the electromagnetic check valve (802) through a hydraulic connection pipe; the other valve port of the electromagnetic check valve (802) is connected with the hydraulic oil tank (5).

8. The hydraulic control system for rapid compression of a circuit board according to claim 1, wherein, The hydraulic rod stroke of the rod cavity (102) is less than 50 mm.

9. The hydraulic control system for rapid compression of a circuit board according to claim 1, wherein, A hydraulic monitoring module (7) is arranged between the first one-way valve module (401) and the reversing valve (403) and between the second one-way valve module (402) and the rodless cavity (101), and the hydraulic monitoring module (7) comprises a pressure sensor (701) for detecting the pressure of a hydraulic oil circuit, a pressure gauge (702), and a pressure gauge switch (703) for controlling the opening and closing of the pressure.

10. The hydraulic control system for rapid compression of a circuit board of claim 1 wherein, The reversing valve (403) is a three-position four-way electromagnetic reversing valve, and the second one-way valve module (402) is a hydraulic control one-way valve; one side of the hydraulic oil tank (5) is further provided with a liquid level meter for marking the internal liquid level.

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