Electric control high-low pressure hydraulic centering clamp

Abstract

The utility model discloses an electric control high-low pressure hydraulic centering clamp which comprises a clamping and fixing assembly, the clamping and fixing assembly comprises an oil cylinder base, a centering clamp body, a centering clamping jaw and a linear cylinder, and the clamping and fixing assembly is used for clamping and fixing parts; the force control module is used for controlling the force of the linear cylinder; in order to solve the problems that in the prior art, the tightening force of a common machining clamp is only set to be a constant value, the tightening force is kept unchanged in the whole process from rough machining to final finish machining, and plastic deformation is likely to be generated after the rigidity of a workpiece machining structure is reduced, a clamping and fixing assembly is designed; a workpiece can be fixed through the clamping and fixing assembly, centering clamping operation is achieved, precise operation of a mechanical part is ensured, meanwhile, a force control module is arranged, and a high clamping force and a low clamping force can be generated through the force control module so as to meet different machining requirements.

Description

Technical Field

[0001] This application relates to the field of clamping technology, and in particular to electrically controlled high and low pressure hydraulic centering clamps. Background Technology

[0002] The contemporary machining fixture technology presents several key characteristics: At the manufacturing level, there is a need to improve production efficiency, ensure machining accuracy, and reduce labor intensity to meet the requirements of large-scale production and high-quality product manufacturing. In terms of machining process development, the increase in multi-variety, small-batch production models and the widespread adoption of CNC machining technology are driving fixtures towards greater flexibility, versatility, and high precision. Classified by power source, there are manual fixtures, pneumatic fixtures, hydraulic fixtures, and magnetic fixtures. Hydraulic and pneumatic fixtures offer accurate positioning and rapid clamping, making them suitable for mass production, while electro-permanent magnetic fixtures offer fast clamping and releasing, a large clamping range, and energy efficiency, making them suitable for both small-batch and large-batch production. Furthermore, with the rise of intelligent manufacturing, the demand for automated production and the application of intelligent control have made fixtures an important component of automated production lines, evolving towards intelligence and information technology to adapt to the development trends of modern manufacturing.

[0003] The existing patent document "CN205630067U Machining Fixture" discloses a machining fixture. Although the fixture in the above technical solution can clamp and fix the workpiece, the clamping force of the fixture in the above technical solution is only set to a constant value and remains unchanged throughout the entire process from roughing to final finishing. This constant clamping force cannot be adjusted according to the cutting process and the dynamic changes in material rigidity. Especially after roughing, the workpiece material has reduced structural rigidity due to machining. At this time, the constant clamping force is likely to cause plastic deformation of the workpiece. If finishing is performed in this state of plastic deformation, even if the dimensional accuracy is temporarily met after machining, once the fixture is released, the workpiece will rebound due to deformation, and the final dimensional accuracy will still be difficult to ensure.

[0004] In other words, existing technologies have the following technical problems: ordinary clamps have difficulty controlling the clamping force during clamping. Therefore, an electrically controlled high and low pressure hydraulic centering clamp is proposed to address the above problems. Summary of the Invention

[0005] This embodiment provides an electrically controlled high and low pressure hydraulic centering clamp to solve the problem that ordinary clamps in the prior art have difficulty controlling the clamping force during clamping.

[0006] According to one aspect of this application, an electrically controlled high- and low-pressure hydraulic centering clamp is provided, the electrically controlled high- and low-pressure hydraulic centering clamp comprising:

[0007] A clamping and fixing assembly, comprising: a hydraulic cylinder seat, a core-aligning clamp body, a centering jaw, and a linear cylinder, wherein the clamping and fixing assembly is used to clamp and fix parts;

[0008] A force control module is connected to the linear cylinder, and the force control module is used to control the force of the linear cylinder.

[0009] Furthermore, a linear cylinder is fixedly connected to the center of the cylinder seat, and a core clamp body is fixedly connected to the upper surface of the cylinder seat.

[0010] Furthermore, a core clamp cap is fixedly connected to the upper surface of the core clamp body.

[0011] Furthermore, guide grooves are provided on both sides of the upper end of the core clamp body, and base claws are slidably connected to the grooves on both sides of the core clamp body.

[0012] Furthermore, a centering gripper is fixedly connected to the upper surface of each of the two base claws.

[0013] Furthermore, the core clamp body has an internal cavity, and a core clamp hook is slidably connected in the internal cavity of the core clamp body.

[0014] Furthermore, rocker arm pins are fixedly connected to both sides of the inner cavity of the core clamp body, and rocker arms are rotatably connected to both rocker arm pins. Grooves are provided on both sides of the core clamp hook, and one end of the rocker arm extends into the groove of the core clamp hook.

[0015] Furthermore, a groove is provided on the bottom surface of the base claw, and one end of the rocker arm extends into the groove of the base claw.

[0016] Furthermore, one end of the alignment clamp lever is fixedly connected to the upper end of the linear cylinder, and the other end of the alignment clamp lever is fixedly connected to the bottom end of the alignment clamp hook. With this technical solution, when clamping and fixing are required.

[0017] Furthermore, the force control module includes: an oil tank, a level gauge, a filler port, an oil suction filter, a motor, a variable displacement piston pump, a tubular check valve, a pressure gauge switch, a system pressure gauge, an air cooler, a stacked electronically controlled pressure reducing valve, an oil circuit block, a pressure reducing valve pressure gauge, a solenoid directional valve, a stacked hydraulically controlled check valve, a stacked one-way throttle valve, and a junction box.

[0018] In order to solve the problem that in the prior art, the clamping force of ordinary machining fixtures is only set to a constant value and remains unchanged throughout the entire process from roughing to final finishing, which is prone to plastic deformation due to the reduction of the rigidity of the workpiece machining structure, this application designs a clamping and fixing component. The clamping and fixing component can fix the workpiece and perform center clamping operation to ensure the precise operation of the mechanical parts. At the same time, a force control module is set up, which can generate two clamping forces, one high and one low, to adapt to different processing requirements. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the internal structure of one embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the surface structure of one embodiment of this application;

[0023] Figure 4 This is a schematic diagram of a force control module according to one embodiment of this application.

[0024] In the diagram: 1. Oil tank; 2. Level gauge; 3. Filler port; 4. Suction filter; 5. Motor; 6. Variable displacement piston pump; 7. Pipeline check valve; 8. Pressure gauge switch; 9. System pressure gauge; 10. Air cooler; 11. Stacked electronic pressure reducing valve; 12. Oil manifold block; 13. Pressure reducing valve pressure gauge; 14. Solenoid directional valve; 15. Stacked hydraulic check valve; 16. Stacked one-way throttle valve; 17. Junction box; 18. Rocker arm pin; 19. Plug; 20. Base claw; 21. Rocker arm; 22. Core clamp body; 23. Core clamp hook; 24. Core clamp cover; 25. Core clamp lever; 26. Centering claw; 27. Cylinder seat; 28. Linear cylinder. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Please see Figure 1-4 As shown, the electrically controlled high and low pressure hydraulic centering fixture includes:

[0031] The clamping and fixing assembly includes: a hydraulic cylinder seat 27, a core clamping body 22, a centering jaw 26, and a linear cylinder 28. The clamping and fixing assembly is used to clamp and fix the parts.

[0032] A force control module is connected to the linear cylinder 28, and the force control module is used to control the force of the linear cylinder 28.

[0033] The above technical solution allows the workpiece to be fixed by the clamping and fixing components. The center clamping operation ensures the precise operation of the mechanical parts. At the same time, a force control module is set up, which can generate two clamping forces, one high and one low, to adapt to different processing needs.

[0034] A linear cylinder 28 is fixedly connected to the center of the cylinder seat 27, and a core clamp body 22 is fixedly connected to the upper surface of the cylinder seat 27.

[0035] A core clamp cover 24 is fixedly connected to the upper surface of the core clamp body 22;

[0036] The upper two sides of the core clamp body 22 are provided with guide grooves, and base claws 20 are slidably connected to the two side grooves of the core clamp body 22.

[0037] A centering gripper 26 is fixedly connected to the upper surface of each of the two base claws 20. Through this technical solution, the movement of the base claws 20 can drive the centering gripper 26 to move, thereby achieving the clamping function.

[0038] The core clamp body 22 has an internal cavity, and a core clamp hook 23 is slidably connected in the internal cavity of the core clamp body 22.

[0039] Both sides of the inner cavity of the core clamp body 22 are fixedly connected with rocker arm pins 18, and both rocker arm pins 18 are rotatably connected with rocker arms 21. Both sides of the core clamp hook 23 are provided with grooves, and one end of the rocker arm 21 extends into the groove of the core clamp hook 23.

[0040] A groove is provided on the bottom surface of the base claw 20, and one end of the rocker arm 21 extends into the groove of the base claw 20;

[0041] One end of the core clamping lever 25 is fixedly connected to the upper end of the linear cylinder 28, and the other end of the core clamping lever 25 is fixedly connected to the bottom end of the core clamping hook 23. With this technical solution, when clamping and fixing are required, the linear cylinder 28 moves downward to drive the core clamping lever 25 to move, and the core clamping hook 23 moves downward to drive the rocker arm 21 to rotate, thereby driving the base claw 20 to move towards the core, thereby driving the centering claw 26 to clamp the core. When it is necessary to release, the linear cylinder 28 moves upward to drive the centering claw 26 to move to both sides to achieve the function of releasing.

[0042] The force control module includes: an oil tank 1, a level gauge 2, an oil filler port 3, an oil suction filter 4, a motor 5, a variable displacement piston pump 6, a tubular check valve 7, a pressure gauge switch 8, a system pressure gauge 9, an air cooler 10, a stacked electronically controlled pressure reducing valve 11, an oil circuit block 12, a pressure reducing valve pressure gauge 13, a solenoid directional valve 14, a stacked hydraulically controlled check valve 15, a stacked one-way throttle valve 16, and a junction box 17.

[0043] With this technical solution, when rough machining and heavy cutting are required, the PLC of the equipment sends an instruction M code to control the solenoid directional valve 14 of the hydraulic station to be in the left position. The instruction M code controls the superimposed electric pressure reducing valve 11 to be in the left position. The solenoid ball valve closes the system and outputs a high pressure of 7 MPa. The output high pressure kinetic energy causes the oil cylinder to move to the left, realizing high pressure clamping of the workpiece. The superimposed one-way throttle valve 16 plays a throttling role in the system, controlling the speed of the oil cylinder movement. The superimposed hydraulic control one-way valve 15 plays a pressure holding role in the system, keeping the clamping force constant.

[0044] When high precision and low cutting force are required, the PLC of the equipment sends an instruction M code to control the solenoid directional valve 14 of the hydraulic station to be in the right position. The instruction M code also controls the superimposed electric pressure reducing valve 11 to be in the right position, the solenoid ball valve to open, and the overflow valve to work. The system reduces pressure and outputs a low pressure of 2 MPa. The system delays for 3 seconds to reduce the system pressure and achieve low-pressure clamping of the workpiece. The superimposed one-way throttle valve 16 plays a throttling role in the system, controlling the speed of the oil cylinder movement. The superimposed hydraulic control one-way valve 15 plays a pressure holding role in the system, keeping the clamping force constant.

[0045] The PLC of the equipment issues an instruction M code to control the solenoid directional valve 14 of the hydraulic station to be in the right position, driving the oil cylinder to move and release the workpiece.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electrically controlled high-low pressure hydraulic centering clamp, characterized in that: The electric control high-low pressure hydraulic centering clamp comprises: A clamping and fixing assembly is arranged on the oil cylinder seat (27) and comprises a centering clamp body (22), a centering clamp jaw (26), and a linear cylinder (28), and is used for clamping and fixing a part; A force control module is connected with the linear cylinder (28) and is used for controlling the force of the linear cylinder (28).

2. The electrically controlled high-low pressure hydraulic centering clamp of claim 1, wherein: The linear cylinder (28) is fixedly connected to the inner center position of the oil cylinder seat (27), and the centering clamp body (22) is fixedly connected to the upper surface of the oil cylinder seat (27).

3. The electrically controlled high-low pressure hydraulic centering clamp of claim 1, wherein: The upper surface of the centering clamp body (22) is fixedly connected with a centering clamp cover (24).

4. The electrically controlled high-low pressure hydraulic centering clamp of claim 1, wherein: The upper end of the centering clamp body (22) is provided with a guide sliding groove on both sides, and the base jaw (20) is slidingly connected to the sliding groove on both sides of the centering clamp body (22).

5. The electrically controlled high-low pressure hydraulic centering clamp of claim 4, wherein: The upper surface of the base jaw (20) is fixedly connected with the centering clamp jaw (26).

6. The electrically controlled high-low pressure hydraulic centering clamp of claim 1, wherein: The centering clamp body (22) is provided with an inner cavity, and the centering clamp pull hook (23) is slidingly connected in the inner cavity of the centering clamp body (22).

7. The electrically controlled high-low pressure hydraulic centering clamp of claim 6, wherein: The inner cavity of the centering clamp body (22) is fixedly connected with a rocker pin (18) on both sides, the rocker pin (18) is rotatably connected with a rocker arm (21), the centering clamp pull hook (23) is provided with a groove on both sides, and one end of the rocker arm (21) extends into the groove of the centering clamp pull hook (23).

8. The electrically controlled high-low pressure hydraulic centering clamp of claim 4, wherein: The bottom surface of the base jaw (20) is provided with a groove, and one end of the rocker arm (21) extends into the groove of the base jaw (20).

9. The electrically controlled high-low pressure hydraulic centering clamp of claim 1, wherein: The upper end of the linear cylinder (28) is fixedly connected with one end of the centering clamp pull rod (25), and the other end of the centering clamp pull rod (25) is fixedly connected with the bottom end of the centering clamp pull hook (23).

10. The electrically controlled high-low pressure hydraulic centering clamp of claim 1, wherein: The force control module comprises an oil tank (1), a liquid level meter (2), a filling port (3), an oil suction filter (4), a motor (5), a variable plunger pump (6), a tubular check valve (7), a pressure gauge switch (8), a system pressure gauge (9), an air cooler (10), a superimposed electric control pressure reducing valve (11), an oil way block (12), a pressure reducing valve pressure gauge (13), an electromagnetic reversing valve (14), a superimposed hydraulic control check valve (15), a superimposed check valve (16), and a junction box (17).

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