Hydraulic pressure and air cylinder synergistic clamp device
Through the clamping device that cooperates with hydraulic and cylinder, the problems of unstable clamping and inaccurate angle in mechanical processing are solved, stable clamping and precise angle adjustment of workpieces are achieved, and machining accuracy and efficiency are improved.
Patent Information
- Application Number
- CN202422183187.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-06
AI Technical Summary
During the machining process, existing fixtures have problems such as unstable longitudinal clamping and inaccurate grinding surface angles of workpieces, which affect processing quality and production efficiency.
The clamping device that cooperates with hydraulic and cylinders is adopted to adjust the angle of the workpiece through the cylinder drive slider, and the piston is driven by hydraulic oil for longitudinal compression to ensure that the workpiece maintains stable clamping and precise angle during grinding.
It realizes stable clamping and precise angle adjustment of the workpiece during grinding, improves processing accuracy and efficiency, and ensures that the grinding surface is parallel to the grinding wheel surface.
Smart Images
Figure CN222986668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fixture tooling, and particularly relates to a fixture device with coordinated hydraulic pressure and air cylinders. Background Art
[0002] During the machining process, it is necessary to grind the workpiece to an accurate size. During the grinding process of the workpiece, the stable clamping and accurate angle adjustment of the workpiece are the keys to ensuring the machining accuracy and efficiency. Existing fixtures often have problems such as unstable longitudinal clamping and inaccurate angles of the grinding surfaces of the workpieces, which affect the machining quality and production efficiency. Summary of the Utility Model
[0003] Aiming at the problems mentioned in the background art, the purpose of the utility model is to provide a fixture device with coordinated hydraulic pressure and air cylinders to solve the problems mentioned in the background art.
[0004] The above technical purpose of the utility model is achieved through the following technical solutions: A fixture device with coordinated hydraulic pressure and air cylinders includes a blanking mechanism and a blank holding mechanism. The blanking mechanism includes an air cylinder, the telescopic end of the air cylinder is connected to a fixed block, the fixed block is connected to a pressing block, and the blanking mechanism adjusts the angle of the workpiece by pushing the pressing block through the air cylinder; the blank holding mechanism includes a piston and a column that are slidably matched, a piston head is arranged at the top of the piston, a ring protrusion is arranged below the piston, the column is provided with a cavity, the ring protrusion closely slides up and down along the inner wall of the cavity and divides the cavity into an upper oil cavity and a lower oil cavity, and both the upper oil cavity and the lower oil cavity are communicated with an oil inlet; a positioning column is arranged between the column and the piston head, the piston slides up and down relative to the positioning column, the outer diameter of the positioning column is smaller than the inner diameter of the workpiece, the outer diameter of the piston head is smaller than the inner diameter of the workpiece, and the piston head presses and fixes the workpiece through a cushion block.
[0005] Preferably, the upper oil cavity is communicated with an upper oil inlet, an oil groove is arranged between the upper oil inlet and the upper oil cavity, and the oil groove is arranged inside the column; the lower oil cavity is communicated with a lower oil inlet, and the lower oil cavity is hermetically connected to the column through an oil seal cover plate.
[0006] Preferably, an outer ring is arranged outside the column, a bottom plate is arranged below the outer ring, and the outer diameters of the column, the outer ring, and the bottom plate increase in sequence.
[0007] Preferably, a slider is arranged below the fixed block, and a guide rail is arranged below the slider, and the direction of the guide rail is the same as the telescopic end of the air cylinder.
[0008] Preferably, the cushion block includes a U-shaped groove, a lower convex platform, and an upper end surface. The U-shaped groove is clamped on the piston, the outer diameter of the lower convex platform is smaller than the inner diameter of the workpiece, and the outer diameter of the upper end surface is larger than the inner diameter of the workpiece.
[0009] In summary, the utility model mainly has the following beneficial effects:
[0010] In the present utility model, a cylinder drives a slider to move towards the grinding surface of a workpiece. Since the surface of the pressing block is already parallel to the grinding wheel, the slider pushes the pressing block to adjust the angle of the grinding surface of the workpiece to be parallel to the surface of the pressing block, which can ensure that the grinding surface is parallel to the surface of the grinding wheel. Then, in cooperation with the material pressing mechanism, hydraulic oil enters the upper oil cavity, pushing the piston to move downward to press the workpiece. The material pressing mechanism ensures that the workpiece is longitudinally pressed and fixed. The cylinder of the ejector mechanism contracts, and then the grinding surface of the workpiece is ground. After grinding, the hydraulic oil enters the lower oil cavity, pushing the piston to move upward to release the workpiece. Description of the Drawings
[0011] Figure 1 is a schematic structural diagram of the workpiece related to the present utility model;
[0012] Figure 2 is a schematic structural diagram of the spacer block related to the present utility model;
[0013] Figure 3 is a schematic structural diagram of the material pressing mechanism related to the present utility model;
[0014] Figure 4 is a sectional view of the ejector mechanism related to the present utility model;
[0015] Figure 5 is a schematic external structural diagram of the material pressing mechanism related to the present utility model;
[0016] Figure 6 is a schematic diagram of the working state of the device of the present utility model;
[0017] Description of the reference numerals: 1, piston head; 2, spacer block; 21, U-shaped groove; 22, lower convex platform; 23, upper end surface; 3, workpiece; 31, grinding surface; 4, positioning column; 5, piston; 51, ring convex; 6, column; 61, cavity; 7, upper oil cavity; 8, oil groove; 9, upper oil inlet; 10, lower oil cavity; 11, lower oil inlet; 12, oil seal cover plate; 13, outer ring; 14, bottom plate; 15, cylinder; 16, guide rail; 17, slider; 18, fixed block; 19, pressing block. Detailed Embodiment
[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0019] In machining, it is necessary to grind the grinding surface 31 of the workpiece 3 to an accurate dimension. For this purpose, the grinding surface 31 and the surface of the grinding wheel need to be parallel so as to meet the processing accuracy requirements. As shown in the figure, Figure 1 is a schematic diagram of the workpiece 3. The device of the present utility model proposes a fixture device that coordinates hydraulics and cylinders for the finish machining of the workpiece 3, including a blank holding mechanism and a ejecting mechanism. The ejecting mechanism is responsible for adjusting the grinding surface 31 to be parallel to the surface of the grinding wheel. After the angle of the grinding surface 31 is adjusted in place, the blank holding mechanism longitudinally presses and fixes the workpiece 3, and then grinding is carried out. The blank holding mechanism includes a column 6. A piston 5 is arranged inside the column 6. The piston 5 can move up and down relative to the column 6. A piston head 1 is fixedly connected to the top end of the piston 5. A positioning column 4 is connected to the top end of the column 6. The positioning column 4 is used to sleeved with the workpiece 3. The number of workpieces 3 sleeved by the positioning column 4 is determined according to the working conditions. In this article, the case where the positioning column 4 sleeves two workpieces 3 is taken as an example for illustration. The positioning column 4 is connected to the column 6 through bolts. In order for the workpiece 3 to be sleeved on the positioning column 4, the outer diameter of the positioning column 4 only needs to be smaller than the inner diameter of the workpiece 3. The outer diameter of the piston head 1 also needs to be smaller than the inner diameter of the workpiece 3, so that the workpiece 3 can be sleeved on the positioning column 4 from top to bottom; and the positioning column also needs to be sleeved on the piston 5 and enable the piston 5 to slide up and down relative to the positioning column 4. The inner diameter of the positioning column 4 needs to be larger than the outer diameter of the piston 5. The piston 5 and the positioning column 4 can be slidably matched; a certain gap is left between the top of the positioning column 4 and the bottom of the piston head for placing a spacer 2, as Figure 2As shown, the spacer block 2 is provided with a U-shaped groove 21 and a lower boss 22. The U-shaped groove 21 is used to be clamped on the piston 5, and the lower boss 22 contacts the upper surface of the positioning post 4. The outer diameter of the lower boss 22 is smaller than the inner diameter of the workpiece 3 or the outer diameter of the lower boss 22 is the same as the outer diameter of the positioning post 4, while the outer diameter of the upper end face 23 of the spacer block 2 is larger than the inner diameter of the workpiece 3. In this way, when the piston head 1 presses down on the upper end face 23, the spacer block 2 forms a downward pressing force on the workpiece 3. A cavity 61 is provided at the bottom end of the column 6. The annular projection 51 near the bottom of the piston 5 divides the cavity 61 into an upper oil cavity 7 and a lower oil cavity 10. The side wall of the annular projection 51 is in close sliding fit with the cavity 61. The upper oil inlet 9 is communicated with the upper oil cavity 7 through an oil groove 8. A sealing ring is provided around the oil groove 8. When the upper oil cavity 7 is filled with oil, the hydraulic oil pushes the annular projection 51 downward and then the piston 5 moves downward; the oil in the lower oil cavity 10 enters from the lower oil inlet 11. When the lower oil cavity 10 is filled with oil, the hydraulic oil pushes the annular projection 51 upward and then drives the piston 5 to move upward. An oil seal cover plate 12 is provided below the lower oil cavity 10 to realize the sealed connection between the lower oil cavity 10 and the column 6. An outer ring 13 is provided outside the column 6, and a bottom plate 14 is provided below the outer ring 13. The outer ring 13 and the bottom plate 14 ensure the stability of the column 6 during the up and down movement of the piston 5. The cylinder blanking mechanism includes a cylinder 15. The telescopic end of the cylinder 15 is connected to a fixed block 18, and the fixed block 18 is connected to a pressing block 19. The outer surface of the pressing block 19 is parallel to the surface of the grinding wheel. When the cylinder 15 is started, it can push the pressing block 19 to adjust the angle of the workpiece 3. In order to reduce the instability of the cylinder 15, a guide rail 16 and a slider 17 are provided below the fixed block 18 to make the pushing of the pressing block 19 more stable. The fixed block 18 is connected to the slider 17 below, and the slider 17 is connected to the guide rail 16 and slides along the guide rail 16. When the cylinder 15 is started, it pushes the fixed block 18 to move towards the workpiece 3. The outer surface of the pressing block 19 is parallel to the surface of the grinding wheel. When the cylinder 15 is started, it can push the pressing block 19 to adjust the angle of the workpiece 3. Making the grinding surface 31 closely adhere to the surface of the pressing block 19 can ensure that the angle of the workpiece 3 meets the requirements.
[0020] When the blanking mechanism needs to fixedly press the workpiece 3, the upper oil inlet 9 is filled with oil. The oil enters the oil groove 8 and then acts on the upper oil cavity 7. The oil in the upper oil cavity 7 pushes the piston 5 to move downward. At the same time, the piston head 1 moves downward to press the spacer block 2, and then the spacer block 2 presses the workpiece 3 to play a role of fixed pressing. When the grinding is completed and the workpiece 3 needs to be taken out, the hydraulic oil enters the lower oil cavity 10 through the lower oil inlet 11. The hydraulic oil in the lower oil cavity 10 can push the piston 5 to move upward, and the piston head 1 is separated from the spacer block 2 to release the workpiece 3.
[0021] During use, first ensure that the grinding surface of the grinding wheel on the outer surface of the pressing block 19 is parallel. After the positioning post 4 is connected to the column 6, two workpieces 3 are sleeved on the positioning post 4. The spacer block 2 is stuck on the piston 5 and is located between the piston head 1 and the upper workpiece 3. Then, start the air cylinder 15 to push the fixed block 18 to move, so that the pressing block 19 adjusts the angles of the two workpieces 3 to be parallel to the grinding surface of the grinding wheel. At this time, the pressing block 19 abuts against the grinding surface 31. Then, the hydraulic oil enters the oil tank 8 from the upper oil inlet 9, and then enters the upper oil cavity 7, pushing the piston 5 to move downward, driving the piston head 1 to move downward to press the spacer block 2, and further pressing the workpiece 3 to play a fixing role. After the positioning of the workpiece 3 is completed, the air cylinder 15 contracts, and the grinding wheel can grind the grinding surface 31. After the grinding is completed, the hydraulic oil enters the lower oil cavity 10 through the lower oil inlet 11, and the hydraulic oil in the lower oil cavity 10 can push the piston 5 to move upward, and the piston head 1 is separated from the spacer block 2 to release the workpiece 3, and the ground workpiece 3 can be taken off.
[0022] The above embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
Claims
1. A clamping device with hydraulic and cylinder coordination, characterized in that: The invention comprises a material pushing mechanism and a material pressing mechanism. The material pushing mechanism comprises a cylinder (15). The telescopic end of the cylinder (15) is connected to a fixed block (18). The fixed block (18) is connected to a pressing block (19). The material pushing mechanism adjusts the angle of a workpiece (3) by pushing the pressing block (19) through the cylinder (15). The material pressing mechanism comprises a piston (5) and a column (6) which are slidably matched. A piston head (1) is arranged on the top of the piston (5). A ring convex (51) is arranged on the bottom of the piston (5). A cavity (61) is arranged on the column (6). The ring convex (5 1) sliding up and down against the inner wall of the cavity (61) and dividing the cavity (61) into an upper oil cavity (7) and a lower oil cavity (10), wherein the upper oil cavity (7) and the lower oil cavity (10) are both connected to an oil inlet; a positioning column (4) is provided between the column (6) and the piston head (1), the piston (5) slides up and down relative to the positioning column (4), the outer diameter of the positioning column (4) is smaller than the inner diameter of the workpiece (3), the outer diameter of the piston head (1) is smaller than the inner diameter of the workpiece (3), and the piston head (1) presses and fixes the workpiece (3) via a cushion block (2).
2. The hydraulic and cylinder coordinated clamping device according to claim 1, characterized in that: The upper oil chamber (7) is connected to the upper oil inlet (9), an oil groove (8) is arranged between the upper oil inlet (9) and the upper oil chamber (7), and the oil groove (8) is arranged in the column (6); the lower oil chamber (10) is connected to the lower oil inlet (11), and the lower oil chamber (10) is sealed and connected to the column (6) through an oil seal cover plate (12).
3. The hydraulic and cylinder coordinated clamping device according to claim 2, characterized in that: An outer ring (13) is disposed outside the column (6), and a bottom plate (14) is disposed below the outer ring (13). The outer diameters of the column (6), the outer ring (13) and the bottom plate (14) increase in sequence.
4. The hydraulic and cylinder coordinated clamping device according to claim 1, characterized in that: A slide block (17) is provided under the fixed block (18), and a guide rail (16) is provided under the slide block (17). The direction of the guide rail (16) is consistent with the telescopic end of the cylinder (15).
5. The clamp device with hydraulic and cylinder coordination according to claim 1, characterized in that: The cushion block (2) comprises a U-shaped groove (21), a lower boss (22) and an upper end surface (23); the U-shaped groove (21) is clamped on the piston (5); the outer diameter of the lower boss (22) is smaller than the inner diameter of the workpiece (3); and the outer diameter of the upper end surface (23) is larger than the inner diameter of the workpiece (3).