Oil pressure supercharging device of movable cross beam clamping system

Abstract

The utility model relates to an oil pressure supercharging device of a movable cross beam clamping system. The oil pressure supercharging device comprises a pump station set and a supercharging oil way connected with the pump station set. The pressurization oil way comprises a pressurization oil way set in hydraulic connection with the pump station set and a pressurization clamping base. The pressurization oil path group is connected with a corresponding opening of a pressurization superposition block C; the pressurizing superposition block C is connected with a port P and a port T of a pressurizing reversing valve; a port A and a port B of the pressurizing reversing valve are sequentially connected with a pressurizing one-way throttle valve and a pressurizing hydraulic control one-way valve. The pressurization hydraulic control one-way valve is connected with a large-end rodless cavity of a pressurization assembly A through a pressurization middle oil way; a rodless cavity at the small end of the pressurizing assembly A is connected with a pressurizing output oil way; the device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to an oil pressure boosting device for a moving crossbeam clamping system. Background Art

[0002] The existing clamping systems need to use pressure clamping. However, in the positions using hydraulics such as the balance cylinder, broach cylinder, and tool magazine of the machine tool, they are all low-pressure systems. Therefore, the main hydraulic station must use a high-pressure system and add a pressure reducing valve to meet the requirements of the low-pressure part. Such a system with a large difference between high and low pressures causes serious oil circuit heating. The motor power of the hydraulic system is very large, and most of the power is dissipated as heat in the pressure reducing part. As a result, the hydraulic system is inefficient, energy-consuming, and even equipped with a cooling system. How to achieve clamping without increasing the oil pressure system is one of the technical problems to be urgently solved. Summary of the Utility Model

[0003] Generally speaking, the technical problem to be solved by the utility model is to provide an oil pressure boosting device for a moving crossbeam clamping system. The utility model can be directly applied to all types of machine tools of the moving crossbeam, such as vertical lathes, vertical turning and milling compound machine tools, etc. It can increase the local oil pressure of the hydraulic oil circuit by a set ratio in a low-pressure hydraulic system without increasing the oil pressure of the hydraulic system oil pump. It saves energy and reduces costs.

[0004] This boosting device is used to increase the clamping force of the moving crossbeam to enhance the stability of the crossbeam during workpiece cutting.

[0005] To solve the above problems, the technical solution adopted by the utility model is as follows:

[0006] An oil pressure boosting device for a moving crossbeam clamping system includes a pump station group and a boosting oil circuit connected to the pump station group;

[0007] The boosting oil circuit includes a boosting oil circuit group hydraulically connected to the pump station group and a boosting clamping base; the boosting oil circuit group is connected to the corresponding port of a boosting stacking block C; the boosting stacking block C is connected to the P port and T port of a boosting reversing valve;

[0008] The A port and B port of the boosting reversing valve are sequentially connected with a boosting one-way throttle valve and a boosting hydraulic control one-way valve;

[0009] The boosting hydraulic control one-way valve is connected to the large end rodless cavity of a boosting component A through a boosting intermediate oil circuit;

[0010] A boosting output oil circuit is connected to the small end rodless cavity of the boosting component A;

[0011] A boosting bypass is connected between the small end rodless cavity and the intermediate cavity of the boosting component A;

[0012] The pressurized clamping base serves as a supporting carrier for clamping; a clamping station for placing the workpiece to be machined is provided on the pressurized clamping base;

[0013] A pressurized clamping movable block driven by a pressurizing oil cylinder is provided on the pressurized clamping base; the pressurized clamping movable block is used to approach the clamping station to clamp the workpiece to be machined;

[0014] The pressurized output oil circuit is connected to the pressurizing oil cylinder.

[0015] As a further improvement of the above technical solution:

[0016] The rodless cavity at the small end of the pressurizing assembly A is also connected with a pressurizing pressure controller.

[0017] A pressurizing pressure reducing valve is provided on the pressurizing reversing valve.

[0018] The pump station group is connected with a stacked valve block A;

[0019] The stacked valve block A is connected with a pressurizing oil circuit group and a tool clamping oil circuit group;

[0020] The tool clamping oil circuit group is connected with a tool clamping reversing valve;

[0021] Port A and port B of the tool clamping reversing valve are connected with the lifting oil cylinder of the tool clamping finger through a tool clamping hydraulic lock.

[0022] A tool clamping check valve and / or a balance valve A are connected to the P port of the tool clamping reversing valve;

[0023] The lifting oil cylinder is equipped with a stroke limit component.

[0024] The stacked valve block A is also connected with a tool rest oil circuit group;

[0025] The tool rest oil circuit group is connected with a tool rest oil cylinder for controlling the tool rest component through a tool rest balance valve B;

[0026] The tool rest oil cylinder is equipped with a tool rest accumulator;

[0027] A tool rest check valve is provided at the inlet of the tool rest balance valve B;

[0028] The tool rest balance valve B is connected with the stacked valve block A through a feedback oil circuit.

[0029] The stacked valve block A is also connected with a turntable oil circuit group;

[0030] The turntable oil circuit group is hydraulically connected in sequence through a turntable control valve and a turntable reversing valve;

[0031] The turntable oil circuit group controls the turntable control valve through a turntable pilot valve;

[0032] The turntable reversing valve is connected with a turntable motor group;

[0033] A turntable auxiliary valve is provided on the turntable oil circuit group.

[0034] The functions of the hydraulic system before improvement include clamping the cutting tool, balancing the crossbeam and the tool magazine. By operating the hydraulic system through the pump station, the movement and clamping of the crossbeam are realized, so as to realize clamping the cutting tool to pick up and place the cutting tool in the tool magazine and clamping it.

[0035] The utility model optimizes the hydraulic system and adds a booster cylinder part. The booster cylinder uses a large-area oil cavity to push a small-area oil cavity to increase the pressure. The increased pressure value is equal to the area ratio multiplied by the system pressure. The stroke of the crossbeam clamping oil cylinder of the utility model is 1 mm, and the required oil flow is very small, which is consistent with the flow that the original hydraulic system can provide.

[0036] When the crossbeam needs to be clamped, the machine tool is in the machining state, and the cutting tool clamping cylinder and the tool magazine part of the hydraulic system do not move; the hydraulic system only needs to supply the flow of the balance bar. The booster clamping cylinder only needs the hydraulic pressure provided by the hydraulic system and does not require the system flow. The whole system works normally.

[0037] When the crossbeam movement stops and the clamping cylinder needs to clamp the crossbeam, other hydraulic actions do not work, only the clamping action of the clamping cylinder, and the overall flow of all hydraulic systems also meets the use requirements.

[0038] The utility model is reasonable in design, low in cost, strong and durable, safe and reliable, simple in operation, time-saving and labor-saving, cost-saving, compact in structure and convenient in use. The utility model can meet the use requirements only by using low pressure and has a low cost. The overall system has very low heat generation and a simple hydraulic system. Its micro-stroke clamping oil cylinder reduces the system flow requirement, and the high pressure and small flow keep the system power unchanged. It uses the high pressure transformed from low pressure, reduces the system power and saves energy. Description of the Drawings

[0039] Figure 1 is a schematic diagram of the hydraulic principle of the utility model.

[0040] Figure 2 is a schematic diagram of the booster structure of the utility model.

[0041] Wherein: 1. Pump station group; 2. Superimposed valve block A; 3. Tool clamping oil circuit group; 4. Tool clamping one-way valve; 5. Tool clamping reversing valve; 6. Balance valve A; 7. Tool clamping finger; 8. Stroke limit component; 9. Tool clamping hydraulic lock; 10. Turret oil circuit group; 11. Turret balance valve B; 12. Turret oil cylinder; 13. Turret component; 14. Turret accumulator; 15. Turret one-way valve; 16. Rotary table oil circuit group; 17. Rotary table auxiliary valve; 18. Rotary table control valve; 19. Rotary table pilot valve; 20. Rotary table reversing valve; 21. Rotary table motor group; 22. Boosting oil circuit group; 23. Boosting superimposed block C; 24. Boosting reversing valve; 25. Boosting one-way throttle valve; 26. Boosting pressure reducing valve; 27. Boosting hydraulic control one-way valve; 28. Boosting intermediate oil circuit; 29. Boosting component A; 30. Boosting bypass; 31. Boosting output oil circuit; 32. Boosting pressure controller; 33. Boosting clamping base; 34. Workpiece to be machined; 35. Boosting clamping movable block. Detailed implementation mode

[0042] As Figure 1 , 2 shown, the oil pressure boosting device of the moving crossbeam clamping system in this embodiment includes a pump station group 1 and a boosting oil circuit connected to the pump station group 1 for clamping and pressing.

[0043] The boosting oil circuit includes a boosting oil circuit group 22 hydraulically connected to the pump station group 1 and a boosting clamping base 33; the boosting oil circuit group 22 is connected to the corresponding ports of a boosting superimposed block C23; the boosting superimposed block C23 is connected to the P port and T port of a boosting reversing valve 24; the use of the superimposed block realizes valve block integration and optimizes the pipeline.

[0044] The A port and B port of the boosting reversing valve 24 are sequentially connected with a boosting one-way throttle valve 25 and a boosting hydraulic control one-way valve 27; flow regulation is achieved through the throttle valve, and the clamping state is maintained through the hydraulic control lock.

[0045] The boosting hydraulic control one-way valve 27 is connected to the large end rodless cavity of a boosting component A29 through a boosting intermediate oil circuit 28; thus, secondary boosting is realized by using Pascal's law.

[0046] The boosting component A29 can be a two-stage boosting cylinder.

[0047] A boosting output oil circuit 31 is connected to the small end rodless cavity of the boosting component A29; thus, high-pressure output is realized.

[0048] A boosting bypass 30 is connected between the small end rodless cavity and the intermediate cavity of the boosting component A29; throttling adjustment can be carried out to realize flow compensation.

[0049] The pressurized clamping base 33 serves as a clamping support carrier; a clamping station for placing the workpiece 34 to be machined is provided on the pressurized clamping base 33; clamping is achieved.

[0050] A pressurized clamping movable block 35 driven by a pressurized oil cylinder is provided on the pressurized clamping base 33; the pressurized clamping movable block 35 is used to clamp the workpiece 34 to be machined near the clamping station; it presses down by overcoming the spring force through oil pressure, as shown by the dotted line in the figure, and resets upward through the spring, causing the hydraulic oil to flow back and achieving oil pressure balance through the bypass.

[0051] The pressurized output oil circuit 31 is connected to the pressurized oil cylinder.

[0052] The rodless cavity at the small end of the pressurized component A29 is also connected to a pressurized pressure controller 32, achieving pressure acquisition, and it controls the corresponding valve group regulation through an electric circuit.

[0053] A pressurized pressure reducing valve 26 is provided on the pressurized reversing valve 24, which means that a pressure reducing valve is installed in the pressurized part. When loosening the clamped workpiece, it ensures low-pressure return of the circuit.

[0054] The pump station group 1 is connected to the stacked valve block A2 to achieve pipeline integration and streamline the pipeline;

[0055] The stacked valve block A2 is connected to the pressurized oil circuit group 22 and the tool clamping oil circuit group 3;

[0056] The tool clamping oil circuit group 3 is connected to the tool clamping reversing valve 5;

[0057] The A port and B port of the tool clamping reversing valve 5 are connected to the lifting oil cylinder of the tool clamping finger 7 through the tool clamping hydraulic lock 9 to achieve the lifting of the lifting oil cylinder.

[0058] A tool clamping check valve 4 and / or a balance valve A6 are connected to the P port of the tool clamping reversing valve 5 to prevent reverse flow through the check valve or achieve shift adjustment;

[0059] The lifting oil cylinder is equipped with a stroke limit component 8 to achieve stroke control.

[0060] The stacked valve block A2 is also connected to the tool rest oil circuit group 10 to achieve the control of the lifting of the tool rest;

[0061] The tool rest oil circuit group 10 is connected to the tool rest oil cylinder 12 for controlling the tool rest component 13 through the tool rest balance valve B11;

[0062] The tool rest oil cylinder 12 is equipped with a tool rest accumulator 14 to achieve buffering;

[0063] A tool rest check valve 15 is provided at the inlet of the tool rest balance valve B11 to achieve one-way cut-off;

[0064] The tool rest balance valve B11 is connected to the stacked valve block A2 through a feedback oil circuit.

[0065] The stacked valve block A2 is also connected to the turntable oil circuit group 16; thus, the rotation of the turntable is realized.

[0066] The turntable oil circuit group 16 is hydraulically connected to the turntable control valve 18 and the turntable reversing valve 20 in sequence;

[0067] The turntable oil circuit group 16 controls the turntable control valve 18 through the turntable pilot valve 19;

[0068] The turntable reversing valve 20 is connected to the turntable motor group 21;

[0069] A turntable auxiliary valve 17 is provided on the turntable oil circuit group 16, which can be a combined valve or a single valve, and can be a check valve, a throttle valve, etc.

[0070] As a preferred working introduction, the pump station group 1 supplies oil to the stacked valve block A2, which performs multi-way flow distribution. In the tool clamping oil circuit group 3, the oil enters the tool clamping reversing valve 5 through the tool clamping check valve 4 to supply oil to the lifting cylinder of the tool clamping finger 7. Of course, the speed adjustment can be achieved through the balance valve A6, the stroke switch control can be achieved through the stroke limit component 8, the tool clamping hydraulic lock 9 can achieve the pressure holding control, the tool rest oil circuit group 10 can achieve the oil control, the oil inlet and return adjustment can be achieved through the tool rest balance valve B11, the lifting of the tool rest component 13 is controlled by the tool rest cylinder 12, the tool rest accumulator 14 can achieve energy storage and balance, the tool rest check valve 15 can achieve the one-way control, the turntable oil circuit group 16 controls the turntable, the turntable pilot valve 19 controls the turntable reversing valve 20 through the turntable control valve 18 to realize the rotation or stop of the turntable motor group 21, the booster oil circuit group 22 can achieve the booster control, the booster stacked block C23 can achieve the block connection, simplify the pipeline and vibration, the booster reversing valve 24 can achieve the forward and reverse commutation, the booster one-way throttle valve 25 can achieve the fast oil inlet clamping, one-way cut-off pressure holding, reverse deceleration and loosening, the booster pressure reducing valve 26 can achieve the pressure adjustment, the booster hydraulic control check valve 27 can achieve the hydraulic lock, the booster component A29 uses Pascal's principle to boost pressure, simplify the system, the booster bypass 30 can achieve the closed circuit, achieve the connection, ensure the pressure balance, avoid the negative pressure generated in the middle cavity from affecting the action, the booster output oil circuit 31 can achieve the long-distance connection, the booster pressure controller 32 can achieve the pressure control. When the set pressure value is reached, it is considered that the clamping is completed and the oil supply is stopped. When it is lower than the set pressure, it is considered that it has been loosened. The booster clamping base 33 can support the workpiece 34 to be machined, and the clamping is achieved through the booster clamping movable block 35. The clamping cylinder uses spring reset.

[0071] The original low-pressure hydraulic system of the utility model is used, and a supercharging device is added. The supercharging device is connected to the clamping cylinder. The stroke of the hydraulic clamping cylinder is reduced to 1 mm, and the flow requirement is reduced. The principle of the clamping position is that the clamping can be released when it is in contact but not under force. Therefore, the 1-mm stroke of the clamping cylinder can meet the requirements. A one-way valve is installed after the reversing valve that controls the clamping and releasing of the cylinder to maintain the oil pressure. A stop valve is added in the high-pressure range of the supercharging device to achieve initial oil filling. The vacuum suction principle is used to drive the piston of the clamping cylinder to perform the releasing action when the clamping cylinder is released.

[0072] The utility model is fully described for a clearer disclosure, and the prior arts will not be listed one by one.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; as those skilled in the art, it is obvious to combine multiple technical solutions of the utility model. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. The technical content not described in detail in the utility model is well-known technology.

Claims

1. A hydraulic booster device for a moving crossbeam clamping system, characterized in that: It comprises a pump station group (1) and a booster oil circuit connected to the pump station group (1); The boost oil circuit comprises a boost oil circuit group (22) and a boost clamping base (33) hydraulically connected to the pump station group (1); the boost oil circuit group (22) is connected to corresponding ports of a boost stacking block C (23); the boost stacking block C (23) is connected to the P port and the T port of a boost reversing valve (24); The A port and the B port of the boost reversing valve (24) are connected to a boost check valve (25) and a boost hydraulic control check valve (27) in sequence; The boost hydraulic control one-way valve (27) is connected to the large-end rodless chamber of the boost component A (29) through the boost intermediate oil circuit (28); A boost output oil passage (31) is connected to the rodless chamber at the small end of the boost assembly A (29); A boost bypass (30) is connected between the small end rodless chamber and the middle chamber of the boost assembly A (29); The pressurized clamping base (33) serves as a clamping support carrier; a clamping station for placing a workpiece (34) to be processed is provided on the pressurized clamping base (33); A boost clamping movable block (35) driven by a boost oil cylinder is arranged on the boost clamping base (33); the boost clamping movable block (35) is used to clamp the workpiece (34) to be processed close to the clamping station; The boost output oil circuit (31) is connected to the boost oil cylinder.

2. The hydraulic booster device for the movable crossbeam clamping system according to claim 1 is characterized in that: The small end rodless chamber of the boost component A (29) is also connected to a boost pressure controller (32).

3. The hydraulic booster device for the movable crossbeam clamping system according to claim 1 is characterized in that: A pressure-boosting and pressure-reducing valve (26) is arranged on the pressure-boosting reversing valve (24).

4. The hydraulic booster device for the movable crossbeam clamping system according to claim 1 is characterized in that: The pump station group (1) is connected to a stacked valve block A (2); The superimposed valve block A (2) is connected to a pressurizing oil circuit group (22) and a tool clamping oil circuit group (3); The tool clamping oil circuit group (3) is connected to a tool clamping reversing valve (5); The A port and the B port of the tool clamping reversing valve (5) are connected to the lifting cylinder of the tool clamping finger (7) through the tool clamping hydraulic lock (9).

5. The hydraulic booster device for the movable crossbeam clamping system according to claim 4 is characterized in that: A tool clamping non-return valve (4) and / or a balancing valve A (6) are connected to the P port of the tool clamping reversing valve (5); The lifting oil cylinder is equipped with a travel limit assembly (8).

6. The hydraulic booster device for the movable crossbeam clamping system according to claim 4 is characterized in that: The superimposed valve block A (2) is also connected to a tool holder oil circuit group (10); The tool rest oil circuit group (10) is connected to a tool rest oil cylinder (12) for controlling a tool rest component (13) via a tool rest balance valve B (11); The tool rest oil cylinder (12) is equipped with a tool rest accumulator (14); A tool holder check valve (15) is provided at the inlet of the tool holder balance valve B (11); The tool holder balance valve B (11) is connected to the stacking valve block A (2) through a feedback oil circuit.

7. The hydraulic booster device for the movable crossbeam clamping system according to claim 4 is characterized in that: The stacked valve block A (2) is also connected to a turntable oil circuit group (16); The turntable oil circuit group (16) is connected to the turntable control valve (18) and the turntable reversing valve (20) in sequence through hydraulic connection; The turntable oil circuit group (16) controls the turntable control valve (18) via the turntable pilot valve (19); The turntable reversing valve (20) is connected to a turntable motor group (21); A turntable auxiliary valve (17) is arranged on the turntable oil circuit group (16).

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