High-pressure pressure-maintaining modular clamp

Abstract

The high-pressure pressure-maintaining modular clamp comprises a base, a hydraulic cavity is formed in the base, a piston rod is further arranged on the base, the piston rod is in sliding fit with the base in the axis direction of the piston rod, one end of the piston rod is arranged in the hydraulic cavity in a penetrating mode, and a piston pad is fixed to the end, in the hydraulic cavity, of the piston rod; the two piston rods are symmetrically arranged at the two ends of the hydraulic cavity, the two piston pads divide the hydraulic cavity into a first cavity and two identical second cavities, a clamping liquid inlet and a loosening liquid inlet are formed in the base, the clamping liquid inlet is communicated with the first cavity, the loosening liquid inlet is communicated with the two second cavities respectively, and the clamping liquid inlet is communicated with the first cavity. An abutting mechanism used for fixing a to-be-machined workpiece is arranged on the side, away from the hydraulic cavity, of any piston rod. The clamp has the effect of improving the consistency of a plurality of workpieces fixed by using the clamp.

Description

Technical Field

[0001] The present application relates to the technical field of modular clamps, and in particular to a high-pressure maintaining modular clamp. Background Art

[0002] Fixtures are usually used to fix the objects to be processed in the mechanical manufacturing process so that they are in the correct relative position for construction or inspection.

[0003] In the related art, when batch processing of workpieces is required, in order to improve work efficiency, a plurality of fixtures are provided, and each fixture is hydraulically driven to clamp the corresponding workpiece to be processed.

[0004] With respect to the above-mentioned related technologies, the cumbersome operation of multiple fixtures will affect the processing efficiency, and the clamping degrees of multiple fixtures on multiple workpieces are different, resulting in low consistency of the workpieces after processing. Summary of the invention

[0005] In order to improve the consistency of workpiece processing during high-efficiency processing, the present application provides a high-pressure and pressure-maintaining modular fixture.

[0006] The high-pressure holding modular fixture provided in this application adopts the following technical solution:

[0007] A high-pressure, pressure-maintaining modular fixture comprises a base, a hydraulic cavity is formed on the base, a piston rod is also provided on the base, the piston rod is slidably matched with the base along its axial direction, one end of the piston rod is inserted into the hydraulic cavity, a piston pad is fixed to one end of the piston rod in the hydraulic cavity, two piston rods are symmetrically arranged at both ends of the hydraulic cavity, the piston pads on the two piston rods are arranged at intervals in the hydraulic cavity, the two piston pads divide the hydraulic cavity into a first chamber and two identical second chambers, a clamping liquid inlet and a release liquid inlet are provided on the base, the clamping liquid inlet is connected to the first chamber, and the release liquid inlet is connected to the two second chambers respectively, and a tightening mechanism for fixing the workpiece to be processed is provided on the side of any piston rod facing away from the hydraulic cavity.

[0008] By adopting the above technical method, the staff puts the workpiece to be processed on the clamping mechanism, and introduces hydraulic oil into the first chamber through the clamping liquid inlet. The hydraulic oil pushes the two pistons to move to the side away from each other, and the two piston rods push the clamping mechanisms on both sides to clamp the workpiece to be processed, so that the two workpieces to be processed are fixed on the fixture. After the processing is completed, the staff releases the liquid inlet and introduces hydraulic oil into the second chamber. The hydraulic oil pushes the two pistons to move to the side close to each other, and the two piston rods drive the clamping mechanisms on both sides to release the workpiece, so that the staff can take the workpiece off the fixture.

[0009] Preferably, a pressure-maintaining device is further provided on the base, and the pressure-maintaining device is communicatively arranged between the clamping liquid inlet and the hydraulic chamber.

[0010] By adopting the above technical solution, the pressure-maintaining device helps to maintain the pressure in the hydraulic cavity, and the clamping mechanism will not release the workpiece if the worker does not introduce hydraulic oil into the release inlet. At the same time, the pressure-maintaining device helps to reduce the damage to the workpiece caused by the clamping mechanism when the pressure is too high.

[0011] Preferably, the pressing mechanism comprises a pressing plate arranged corresponding to the workpiece to be processed, the pressing plate slides on the base along the axial direction of the piston rod, and the pressing plate is detachably arranged at an end of the piston rod away from the hydraulic chamber.

[0012] By adopting the above technical solution, the staff can make the fixture suitable for different workpieces to be processed by replacing different pressure plates, which helps to improve the application scope of the high-pressure and pressure-maintaining modular fixture.

[0013] Preferably, a limit pad is fixed in the hydraulic chamber, and the limit pad is located between two piston pads.

[0014] By adopting the above technical solution, when the staff introduces excessive hydraulic oil into the second cavity, the limit pad helps to reduce the possibility of the two piston pads colliding with each other.

[0015] Preferably, the hydraulic chamber, the two piston rods and two piston pads arranged in the hydraulic chamber and the two corresponding clamping mechanisms on the two piston rods form a group of clamping devices, and multiple clamping devices are arranged on the base, and any of the hydraulic chambers are connected.

[0016] By adopting the above technical solution, multiple clamping devices enable the high-pressure pressure-maintaining modular fixture to clamp multiple workpieces to be processed at the same time, which helps to further improve the consistency of multiple workpieces while improving the working efficiency of the fixture.

[0017] Preferably, an accumulator is also provided on the base, the accumulator is connected to the hydraulic chamber, and the accumulator is located between the pressure maintaining device and the hydraulic chamber.

[0018] By adopting the above technical solution, when the pressure of the hydraulic oil leading to the hydraulic chamber increases rapidly, the accumulator can absorb the hydraulic impact force generated in the hydraulic system.

[0019] Preferably, the pressure maintaining device is a hydraulically controlled one-way valve.

[0020] By adopting the above technical solution, the hydraulically controlled one-way valve helps to maintain the overall pressure in the hydraulic system.

[0021] Preferably, the hydraulically controlled one-way valve comprises a shell, wherein a first sealing cavity is formed in the shell, the first sealing cavity comprises a first cavity and a second cavity, a connecting hole for communication is provided between the first cavity and the second cavity, and a sealing ball is also provided in the second cavity. When the sealing ball is pressed against the side wall of the connecting hole, the first cavity and the second cavity are not connected, the first cavity is connected with the clamping liquid inlet, and the second cavity is connected with the first cavity, a push rod is also slidably provided in the shell, one end of the push rod is pressed against the sealing ball, and a return spring for driving the push rod away from the sealing ball is also sleeved on the side of the push rod away from the sealing ball, and a third sealing cavity is also formed in the shell, the third sealing cavity is connected with the release liquid inlet, a push block is penetrated in the third sealing cavity, the push block is located on the side of the push rod away from the sealing ball, and the third sealing cavity is located on the side of the push block away from the push rod, the push rod is slidably matched with the push block along its axial direction, and the push block is slidably matched with the shell along the axial direction of the push rod.

[0022] By adopting the above technical solution, in actual work, the staff will place the workpiece to be processed on the clamping mechanism, and introduce hydraulic oil through the clamping inlet. The hydraulic pressure enters the first cavity, and the hydraulic oil pushes the sealing ball away from the connecting hole. The hydraulic oil flows into the second cavity through the connecting hole and then into the first chamber of the hydraulic cavity. The hydraulic oil pushes the two piston pads to move to the side away from each other. When the clamping mechanism presses against the workpiece to be processed, the piston rod cannot move. When the hydraulic oil continues to be introduced, the hydraulic oil pressure in the hydraulic cavity is greater than the hydraulic oil pressure in the shell. The hydraulic oil pushes the sealing ball to press against the connecting hole, so that the first cavity and the second cavity are not connected, which helps to ensure the pressure in the hydraulic cavity. Even if the hydraulic oil introduced into the clamping inlet is disconnected, the clamp will remain in the clamped state. When the clamp needs to be loosened, hydraulic oil is introduced into the loosening inlet. The hydraulic oil will be introduced into the second cavity at the same time to push the piston rod to contract, and at the same time push the push block, and the push block pushes the push rod, thereby pushing the sealing ball to move to the side away from the connecting hole, so that the first cavity and the second cavity are connected. When the two piston rods slide towards each other, the hydraulic oil in the first chamber will flow through the second chamber, the connecting hole, the first chamber, and finally out of the clamping inlet. In this way, it helps to ensure that when in the clamping state, the worker does not pass hydraulic oil into the loosening inlet, and the workpiece to be processed will be fixed on the fixture by the clamping mechanism.

[0023] Preferably, a pressure gauge is also provided on the base, and the pressure gauge sensing part is provided in the hydraulic cavity.

[0024] By adopting the above technical solution, the pressure gauge helps the staff to monitor the pressure status of the hydraulic system in real time.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The piston rods arranged on both sides of the hydraulic chamber and the tightening mechanism arranged on the piston rods help to improve the consistency of the workpiece fixed by the clamp after processing, thereby helping to improve the processing efficiency of the workpiece;

[0027] 2. The pressure-holding device and accumulator help to ensure that after clamping the workpiece, there is no possibility of accidental release of the workpiece by the fixture, which helps to further improve the consistency of the workpiece after processing;

[0028] 3. The detachable pressure plate helps to improve the application range of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an axonometric diagram of a high-pressure holding modular fixture according to an embodiment of the present application;

[0030] Figure 2 It is a hydraulic principle diagram of the internal hydraulic circuit of the high-pressure pressure-maintaining modular clamp in the embodiment of the present application;

[0031] Figure 3 It is an exploded view of the structure between the mounting frame and the base plate of the embodiment of the present application;

[0032] Figure 4 is an exploded view of the structure of the clamping device according to an embodiment of the present application;

[0033] Figure 5 is a cross-sectional view of the internal structure of the hydraulic chamber according to an embodiment of the present application;

[0034] Figure 6 It is an axonometric diagram of a hydraulic circuit in a high-pressure pressure-maintaining modular fixture according to an embodiment of the present application;

[0035] Figure 7 is a schematic diagram of a hydraulic circuit in a high-pressure pressure-maintaining modular clamp according to an embodiment of the present application;

[0036] Figure 8 is a cross-sectional view of a pressure-maintaining device according to an embodiment of the present application;

[0037] Fig. 9 It is a cross-sectional view of the internal structure of the pressure maintaining device according to an embodiment of the present application.

[0038] Figure numerals: 100, workpiece; 1, base; 2, mounting frame; 21, clamping liquid inlet; 22, releasing liquid inlet; 23, zero-point positioning seat; 24, zero-point positioning rivet; 25, Parr joint; 26, guide column; 3, bottom plate; 31, positioning groove; 4, positioning frame; 41, hydraulic chamber; 411, first chamber; 412, second chamber; 413, slot; 42, end cover; 43, limit pad; 44, piston rod; 45, piston pad; 46, positioning block; 5, tightening mechanism; 51, positioning Plate; 511, limit groove; 512, forming surface; 52, pressure plate; 6, pressure gauge; 7, accumulator; 8, pressure maintaining device; 81, shell; 811, first sealed cavity; 8111, first cavity; 8112, second cavity; 8113, connecting hole; 812, second sealed cavity; 813, third sealed cavity; 82, locking block; 821, limit block; 83, sealing ball; 84, push rod; 85, sealing gasket; 86, reset spring; 87, push block; 88, sealing sheet; 89, adjusting block. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-9 This application is described in further detail.

[0040] The embodiment of the present application discloses a high-pressure and pressure-maintaining modular clamp.

[0041] See also Figure 1 , Figure 2 The high-pressure pressure-maintaining modular fixture includes a base 1, and the base 1 includes a mounting frame 2, a base plate 3 and a positioning frame 4. The base plate 3 is detachably fixed to the mounting frame 2, and the positioning frame 4 is fixed to the base plate 3 by bolts. A plurality of clamping devices are arranged on the positioning frame 4, and the plurality of clamping devices are arranged at intervals along the length direction of the positioning frame 4. In the present embodiment, there are six clamping devices. The staff places the workpiece 100 to be processed on the corresponding position of the base plate 3. The staff introduces hydraulic oil into the hydraulic circuit of the fixture to drive the plurality of clamping devices to start at the same time, thereby fixing the workpiece 100 to be processed on the high-pressure pressure-maintaining modular fixture. In this way, it helps to improve the consistency of the workpiece 100 fixed by the fixture during processing, and at the same time helps to improve the processing efficiency.

[0042] See also Figure 1 , Figure 3Two zero-point positioning seats 23 are fixed on the mounting frame 2, and two corresponding zero-point positioning rivets 24 are fixed on the lower side of the base plate 3. The mounting frame 2 and the base plate 3 are detachably fixed by the two zero-point positioning seats 23 and the corresponding two zero-point positioning rivets 24. A guide column 26 is also fixed on the base plate 3. The axial direction of the guide column 26 is parallel to the height direction of the base 1. Two guide columns 26 are arranged on the mounting frame 2. The axes of the two zero-point positioning seats 23 and the axes of the two guide columns 26 are not on the same plane. In this way, it is convenient for the staff to position the base plate 3 when installing the base plate 3. In this way, it is helpful for the staff to install the base plate 3 with different clamping devices on the base 1, which helps to improve the use efficiency and application scope of the clamp.

[0043] join Figure 1-Figure 7 The mounting frame 2 is provided with a clamping liquid inlet 21 and a releasing liquid inlet 22. The mounting frame 2 and the bottom plate 3 are also fixed with correspondingly arranged Pal joints 25, and two Pal joints 25 are provided. The clamping device includes a hydraulic chamber 41, and the two Pal joints 25 respectively connect the clamping liquid inlet 21 and the hydraulic chamber 41, and the releasing liquid inlet 22 and the hydraulic chamber 41. The Pal joints 25 facilitate the staff to connect the hydraulic circuits on the mounting frame 2 and the bottom plate 3.

[0044] The bottom plate 3 is detachably fixed with a positioning frame 4 by bolts, and any hydraulic chamber 41 is formed on the positioning frame 4. The hydraulic chamber 41 penetrates the positioning frame 4 along the width direction of the positioning frame 4, and two end covers 42 are respectively provided at both ends of the hydraulic chamber 41. A piston rod 44 is also provided in the hydraulic chamber 41, and one piston rod 44 is respectively provided at both ends of the hydraulic chamber 41. The two piston rods 44 penetrate the corresponding end covers 42 respectively, and sealing rings are embedded in the end covers 42. A piston pad 45 is formed on the side where the two piston rods 44 are close to each other, and the two piston pads 45 divide the hydraulic chamber 41 into a first chamber 411 and two second chambers 412. The first chamber 411 is connected to the clamping liquid inlet 21, and the two second chambers 412 are respectively connected to the loosening liquid inlet 22. Multiple first chambers 411 in the positioning frame 4 are connected, and multiple second chambers 412 are connected. A tightening mechanism 5 is provided on the side where the two piston rods 44 are separated from each other. When the workpiece 100 needs to be clamped, the staff introduces hydraulic oil into the first chamber 411 through the clamping liquid inlet 21, and the hydraulic oil pushes the two piston pads 45 to move away from each other. Any piston pad 45 drives the corresponding piston rod 44 to push the clamping mechanism 5 to clamp the workpiece 100 to be processed, so that the workpiece 100 to be processed is fixed on the bottom plate 3.

[0045] A limit pad 43 is also fixed in the hydraulic chamber 41. The limit pad 43 is a retaining spring. A retaining groove 413 is formed in the hydraulic chamber 41. The retaining spring is embedded in the retaining groove 413. The two piston pads 45 are respectively located on both sides of the thickness direction of the retaining spring. When the workpiece 100 is loosened, the staff releases the liquid inlet 22 to pass hydraulic oil into the two second chambers 412 of the hydraulic chamber 41. The hydraulic oil pushes the two piston pads 45 to move to the side away from each other. The retaining spring limits the two piston pads 45, which helps to reduce the possibility of the two piston pads 45 colliding with each other.

[0046] A positioning block 46 is formed on the side of the two piston rods 44 facing away from each other. Any clamping mechanism 5 includes a positioning plate 51 and a pressure plate 52, and the thickness direction of the positioning plate 51 is parallel to the thickness direction of the bottom plate 3. A limiting groove 511 is provided on the side of the positioning plate 51 close to the piston rod 44, and the limiting groove 511 penetrates the positioning plate 51 along the thickness direction of the positioning plate 51. The positioning block 46 and the piston rod 44 corresponding to the piston rod 44 are embedded in the limiting groove 511. A molding surface 512 is formed on the side of the positioning plate 51 facing away from the piston rod 44, and the molding surface 512 is arranged corresponding to the outer side surface of the workpiece 100 close to the positioning plate 51. A positioning groove 31 is also formed on the bottom plate 3, and the positioning groove 31 is arranged corresponding to the workpiece 100. When the hydraulic oil flows into the first chamber 411 of the hydraulic cavity 41 from the clamping inlet 21 , the two piston rods 44 move away from each other, and the piston rods 44 push the positioning plate 51 to move toward the workpiece 100 , and the molding surface 512 presses against the outer surface of the workpiece 100 .

[0047] The thickness direction of the pressing plate 52 is the same as that of the positioning plate 51. The pressing plate 52 is located on the upper side of the positioning plate 51 and is fixed to the base 1 by bolts. One pressing plate 52 is provided on each side of the positioning plate 51 in the width direction. The positioning plate 51 and any pressing plate 52 are slidably matched along the axis direction of the piston rod 44. The pressing plate 52 helps to limit the positioning plate 51.

[0048] See also Figure 1 , Figure 2 , Figure 5-Figure 9, a pressure-maintaining device 8 is also provided on the bottom plate 3, and the pressure-maintaining device 8 is a hydraulically controlled one-way valve. The pressure-maintaining device 8 includes a shell 81, and a locking block 82 is penetrated at one end of the shell 81 in the length direction, and one end of the locking block 82 along its axial direction is detachably fixed to the shell 81. A limit block 821 is provided at one end of the locking block 82 located in the shell 81, and the end of the limit block 821 close to the locking block 82 is penetrated in the locking block 82, and the limit block 821 is slidably matched with the locking block 82 along the length direction of the shell 81. A sealing ball 83 is provided on the side of the limit block 821 away from the locking block 82, and the sealing ball 83 is slidably matched with the locking block 82 along the length direction of the shell 81, and the limit block 821 is pressed against the sealing ball 83. A push rod 84 is provided on the side of the sealing ball 83 away from the limit block 821, and the axial direction of the push rod 84 is parallel to the length direction of the shell 81. A push block 87 is coaxially sleeved on the side of the push rod 84 away from the sealing ball 83, and the end of the push rod 84 close to the push block 87 is inserted into the push block 87, and the push rod 84 and the push block 87 slide and cooperate along the axis direction thereof. A return spring 86 is also sleeved on the push rod 84, and the end of the return spring 86 away from the push block 87 abuts against the inner wall of the housing 81, and the side of the return spring 86 close to the push block 87 abuts against a protrusion formed on the side of the push rod 84 close to the push block 87. The push block 87 and the housing 81 slide and cooperate along the axis direction of the push block 87. An adjustment block 89 is also provided on the end of the push block 87 away from the push rod 84. The adjustment block 89 is inserted into the end of the housing 81 away from the locking block 82, and the adjustment block 89 and the housing 81 slide and cooperate along the length direction of the housing 81. The side of the adjustment block 89 close to the push block 87 abuts against the push block 87.

[0049] The push rod 84 is also sleeved with a sealing gasket 85, which is located on the side of the spring away from the push block 87. The push block 87 is also sleeved with a sealing sheet 88. The sealing gasket 85 and the sealing sheet 88 are both embedded in the housing 81 and fixed relatively to the housing 81. The sealing gasket 85 and the sealing sheet 88 separate the first sealed cavity 811, the second sealed cavity 812 and the third sealed cavity 813 inside the housing 81. The first sealed cavity 811 also includes a first cavity 8111 and a second cavity 8112, and a connecting hole 8113 is provided between the first cavity 8111 and the second cavity 8112. The connecting hole 8113 is contracted from the side close to the locking block 82 to the side close to the adjusting block 89 along the length direction of the housing 81. The sealing ball 83 is located in the second cavity 8112. When the sealing ball 83 is pressed against the connecting hole 8113, the first cavity 8111 and the second cavity 8112 are not connected. The first cavity 8111 is connected to the clamping liquid inlet 21, the second cavity 8112 is connected to the first chamber 411 of the hydraulic chamber 41, and the third sealed cavity 813 is connected to the hydraulic passage between the release liquid inlet 22 and the second chamber 412. The second sealed cavity 812 is open and connected to the outside.

[0050] The staff introduces hydraulic oil into the high-pressure pressure-maintaining modular clamp through the clamping liquid inlet 21. The hydraulic oil enters the first cavity 8111, pushing the sealing ball 83 to move to the side away from the first cavity 8111. The hydraulic oil flows into the second cavity 8112 through the first cavity 8111, and then flows into the first chamber 411 of the hydraulic cavity 41. The hydraulic oil continues to be introduced, and the hydraulic oil pressure in the first chamber 411 gradually exceeds the hydraulic oil pressure in the first cavity 8111. The hydraulic oil pushes the sealing ball 83 to press against the connecting hole 8113, so that the first cavity 8111 and the second cavity 8112 are not connected. In this way, the pressure in the hydraulic cavity 41 is guaranteed, and the clamp will remain in the clamped state even if the hydraulic oil introduced into the clamping liquid inlet 21 is disconnected. When the workpiece 100 needs to be loosened, the staff will release the hydraulic oil into the second chamber 412 in the hydraulic chamber 41 by releasing the liquid inlet 22, and the hydraulic oil will flow into the third sealing chamber 813 at the same time. The hydraulic oil pushes the push block 87 to move away from the adjustment block 89, and the push block 87 pushes the push rod 84, and the push rod 84 pushes the sealing ball 83 to move away from the connecting hole 8113, so that the first chamber 8111 and the second chamber 8112 are connected. The hydraulic oil is filled into the two second chambers 412 in the hydraulic chamber 41, and the hydraulic oil in the first chamber 411 flows through the second chamber 8112, the connecting hole 8113, the second chamber 8112, and then flows out of the clamp from the clamping liquid inlet 21.

[0051] When the staff stops injecting pressure into the release inlet 22, the hydraulic oil can flow out freely from the release inlet 22. Therefore, the hydraulic pressure in the first chamber 411 in the hydraulic cavity 41 is greater than the hydraulic pressure in the second chamber 412. The return spring 86 drives the push rod 84 to move away from the sealing ball 83. The sealing ball 83 presses against the connecting hole 8113 to disconnect the first cavity 8111 and the second cavity 8112, thereby preventing the hydraulic oil in the first cavity 411 from flowing out.

[0052] An accumulator 7 is also provided on the bottom plate 3, and the accumulator 7 is connected and arranged between the first cavity 8111 and the first chamber 411. When the pressure of the hydraulic oil leading to the first chamber 411 increases rapidly, the accumulator 7 can absorb the hydraulic impact force generated in the hydraulic system.

[0053] A pressure gauge 6 is also provided on the bottom plate 3, and the sensing part of the pressure gauge 6 is connected to the hydraulic circuit between the clamping liquid inlet 21 and the first cavity 8111. The staff can monitor the pressure state in the hydraulic circuit in real time through the pressure gauge 6.

[0054] The implementation principle of a high-pressure pressure-maintaining modular fixture of the embodiment of the present application is as follows: In actual work, the staff places the workpiece 100 to be processed in the positioning groove 31. The staff introduces hydraulic oil into the high-pressure pressure-maintaining modular fixture through the clamping liquid inlet 21, and the hydraulic oil enters the first cavity 8111, pushing the sealing ball 83 to move to the side away from the first cavity 8111, and the hydraulic oil flows into the second cavity 8112 through the first cavity 8111, and then flows into the first chamber 411 of the hydraulic cavity 41. The hydraulic oil pushes the two piston pads 45 to move to the side away from each other, and the positioning block 46 on the piston rod 44 pushes the positioning plate 51 to move in the direction close to the workpiece 100, and the molding surface 512 of the positioning plate 51 is pressed against the outer surface of the workpiece 100. When multiple positioning plates 51 are pressed against the outer surfaces of multiple workpieces 100, the hydraulic oil continues to be introduced into the hydraulic cavity 41, and the liquid pressure in the hydraulic cavity 41 will become larger and larger, and the excessive pressure will be stored by the accumulator 7. When the hydraulic oil is stopped from entering the clamping inlet 21, the hydraulic oil will push the sealing ball 83 against the side wall of the connecting hole 8113, so that the hydraulic oil cannot flow from the first cavity 8111 into the second cavity 8112, and thus cannot flow out from the clamping inlet 21. In this way, as long as the staff does not enter the hydraulic oil into the release inlet 22, the clamp will not release the workpiece 100, which helps to ensure that multiple workpieces 100 on the clamp are clamped at the same time, and helps to improve the consistency of multiple workpieces 100.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-pressure holding modular fixture, characterized in that: The invention comprises a base (1), wherein a hydraulic cavity (41) is formed on the base (1), and a piston rod (44) is also arranged on the base (1), wherein the piston rod (44) is slidably matched with the base (1) along its axial direction, and one end of the piston rod (44) is inserted into the hydraulic cavity (41), and a piston pad (45) is fixed to one end of the piston rod (44) in the hydraulic cavity (41), and two piston rods (44) are symmetrically arranged at both ends of the hydraulic cavity (41), and the piston pads (45) on the two piston rods (44) are spaced in the hydraulic cavity (41). The two piston pads (45) are arranged to separate the hydraulic chamber (41) into a first chamber (411) and two identical second chambers (412); the base (1) is provided with a clamping liquid inlet (21) and a loosening liquid inlet (22); the clamping liquid inlet (21) is communicated with the first chamber (411), and the loosening liquid inlet (22) is communicated with the two second chambers (412) respectively; and a clamping mechanism (5) for fixing a workpiece (100) to be processed is provided on a side of any piston rod (44) facing away from the hydraulic chamber (41).

2. A high-pressure holding modular fixture according to claim 1, characterized in that: The base (1) is also provided with a pressure-maintaining device (8), and the pressure-maintaining device (8) is arranged in communication between the clamping liquid inlet (21) and the hydraulic chamber (41).

3. The high-pressure holding modular fixture according to claim 1, characterized in that: The clamping mechanism (5) comprises a positioning plate (51) arranged corresponding to the workpiece (100) to be processed, the positioning plate (51) sliding on the base (1) along the axial direction of the piston rod (44), and the positioning plate (51) being detachably arranged at an end of the piston rod (44) away from the hydraulic chamber (41).

4. The high-pressure holding modular fixture according to claim 1, characterized in that: A limit pad (43) is fixed in the hydraulic chamber (41), and the limit pad (43) is located between two piston pads (45).

5. The high-pressure holding modular fixture according to claim 1, characterized in that: The hydraulic chamber (41), two piston rods (44) and two piston pads (45) arranged in the hydraulic chamber (41), and two corresponding clamping mechanisms (5) on the two piston rods (44) form a set of clamping devices. A plurality of clamping devices are arranged on the base (1), and are connected to any of the hydraulic chambers (41).

6. The high-pressure holding modular fixture according to claim 2, characterized in that: An accumulator (7) is also provided on the base (1); the accumulator (7) is connected to the hydraulic chamber (41); and the accumulator (7) is located between the pressure-maintaining device (8) and the hydraulic chamber (41).

7. The high-pressure holding modular fixture according to claim 2, characterized in that: The pressure maintaining device (8) is a hydraulically controlled one-way valve.

8. The high-pressure holding modular fixture according to claim 7, characterized in that: The hydraulically controlled one-way valve comprises a housing (81), wherein a first sealed cavity (811) is formed in the housing (81), wherein the first sealed cavity (811) comprises a first cavity body (8111) and a second cavity body (8112), wherein a connecting hole (8113) for connecting the first cavity body (8111) and the second cavity body (8112) is provided between the first cavity body (8111) and the second cavity body (8112), wherein a sealing ball (83) is further provided in the second cavity body (8112), and when the sealing ball (83) is pressed against a side wall of the connecting hole (8113), the first cavity body (8111) and the second cavity body (8112) are not connected, the first cavity body (8111) is connected to a clamping liquid inlet (21), and the second cavity body (8112) is connected to the first chamber (411), and a push rod (84) is further slidably provided in the housing (81). One end of the push rod (84) abuts against the sealing ball (83), and a return spring (86) for driving the push rod (84) away from the sealing ball (83) is sleeved on the side of the push rod (84) facing away from the sealing ball (83). A third sealing chamber (813) is also formed in the shell (81), and the third sealing chamber (813) is communicated with the release liquid inlet (22). A push block (87) is inserted into the third sealing chamber (813), and the push block (87) is located on the side of the push rod (84) facing away from the sealing ball (83). The third sealing chamber (813) is located on the side of the push block (87) facing away from the push rod (84). The push rod (84) is slidably matched with the push block (87) along its axial direction, and the push block (87) is slidably matched with the shell (81) along the axial direction of the push rod (84).

9. The high-pressure holding modular fixture according to claim 1, characterized in that: A pressure gauge (6) is also provided on the base (1), and a sensing portion of the pressure gauge (6) is arranged in communication with the hydraulic chamber (41).

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