Static pressure clamping device for thin-walled cylindrical parts

Abstract

The present application relates to a kind of static pressure clamping devices of thin-walled cylindrical parts, including lathe, the top surface of lathe is fixedly connected with power box, the output end of power box is fixedly connected with clamping unit, clamping unit includes the clamping cylinder fixedly connected to the output end of power box, cavity is set up in clamping cylinder inside, motor is fixedly connected in clamping cylinder inner wall, motor output end is fixedly connected with fixed assembly, fixed assembly is slidably connected in the inner wall of rotating shaft, rotating shaft outer wall is fixedly connected with clamping assembly, the right side surface of fixed assembly is slidably connected with pressing plate, clamping assembly and pressing plate are slidably connected with dismounting assembly between, the bottom surface of pressing plate is rotatably connected with pusher, one side between six pressing plates is fixedly connected with guard plate, it has beneficial effects that: clamping assembly can be self-adapting adjustment work according to the different size of workpiece and different shape, better adaptation is clamped the shape and size of workpiece, to reduce the time required for manual operation clamping.

Description

Technical Field

[0001] This invention relates to the field of clamping technology, and in particular to a hydrostatic clamping device for thin-walled cylindrical parts. Background Technology

[0002] Thin-walled cylindrical parts have poor rigidity, and traditional clamping methods easily lead to localized stress concentration and deformation. Hydrostatic clamping uses hydraulic / pneumatic pressure as the power source to form an annular hydrostatic oil chamber between the fixture and the workpiece. The pressure is evenly applied to the entire circumference of the cylinder wall. It achieves gapless centering and low-stress clamping with uniformly distributed static pressure, which can significantly reduce machining deformation and improve dimensional and positional accuracy.

[0003] Most existing traditional hydrostatic clamping devices for thin-walled cylindrical parts adopt fixed or manually replaceable clamping structures, which have obvious defects in actual production and use: their clamping range is fixed, and they cannot automatically and adaptively adjust the clamping diameter and clamping force according to the differences in the outer and inner diameters of the clamped thin-walled cylindrical parts. They can only be adapted by manually disassembling and replacing clamping heads or expansion sleeves of different specifications, and cannot automatically match the optimal hydrostatic clamping force according to the differences in the wall thickness and rigidity of the parts.

[0004] Therefore, it is necessary to provide a hydrostatic clamping device for thin-walled cylindrical parts to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a hydrostatic clamping device for thin-walled cylindrical parts, which can solve the problems of fixed clamping range, inability to automatically and adaptively adjust clamping diameter and clamping force according to the differences in outer and inner diameter of the clamped thin-walled cylindrical parts, and the inability to automatically match the optimal hydrostatic clamping force according to the differences in wall thickness and rigidity of the parts.

[0006] According to the technical solution provided by the present invention: a hydrostatic clamping device for thin-walled cylindrical parts, comprising: a lathe, a power box fixedly connected to the top surface of the lathe, and a clamping unit fixedly connected to the output end of the power box;

[0007] The clamping unit includes a clamping cylinder fixedly connected to the output end of the power box. The clamping cylinder has a cavity inside. A motor is fixedly connected to the inner wall of the clamping cylinder. A fixing component is fixedly connected to the output end of the motor. A fixing component is slidably connected to the inner wall of the rotating shaft. A clamping component is fixedly connected to the outer wall of the rotating shaft. A pressure plate is slidably connected to the right side of the fixing component. A disassembly component is slidably connected between the clamping component and the pressure plate. A pushing component is rotatably connected to the bottom surface of the pressure plate. A protective plate is fixedly connected to one side of each of the six pressure plates.

[0008] Preferably, the clamping assembly includes a second bevel gear fixedly connected to the outer wall of the rotating shaft, a plurality of third ball screws rotatably connected to the inner wall of the clamping cylinder, a slider slidably connected to the outer wall of each of the six third ball screws via threads, a first bevel gear fixedly connected to the outer wall of the third ball screw, and the first bevel gear meshing with the second bevel gear, a movable plate slidably connected to the outer wall of the third ball screw, and the movable plate being located between the first bevel gear and the slider, a first spring slidably sleeved on the outer wall of the third ball screw, and the first spring being located between the movable plate and the slider, and a main force plate fixedly connected to the right side of the movable plate.

[0009] Preferably, a limit rod is slidably connected to the inner wall of the main power plate, and a groove matching the moving plate is provided on the inner wall of the clamping cylinder.

[0010] Preferably, the fixing assembly includes a first ball screw connected to the inner wall of the rotating shaft by a thread, a first push plate fixedly connected to the end of the first ball screw away from the motor, a first limiting arc plate fixedly connected to the right end of the first push plate, an auxiliary plate fixedly connected to the end of the main force plate near the first ball screw, and a second limiting arc plate fixedly connected to the end of the auxiliary plate near the rotating shaft, wherein the gap of the second limiting arc plate matches that of the first limiting arc plate.

[0011] Preferably, the pushing assembly includes two fixed shafts fixedly connected to the side of the pressure plate near the first ball screw. The end of the fixed shaft away from the pressure plate is rotatably connected to a flip shaft. The inner wall of the flip shaft is slidably connected to a pushing shaft. A limit ring is fixedly connected to the top of the pushing shaft. A second spring is slidably connected between the limit ring and the fixed shaft. The end of the pushing shaft away from the fixed shaft is rotatably connected to a second push plate.

[0012] Preferably, a retaining plate is slidably connected to the second push plate near the pressure plate, and a retaining groove matching the retaining plate is opened on the right side of the retaining plate. The retaining plate is fixed to the side of the first ball screw by a rubber strip.

[0013] Preferably, the disassembly assembly includes an insert plate fixedly connected to the side of the pressure plate near the motor. Two second ball screws are fixedly connected to the side of the insert plate near the motor. Gears are slidably connected to the outer wall of the second ball screws via threads. Multiple slide plates are slidably connected to the inner wall of the pressure plate. The slide plates are located on opposite sides of the two gears.

[0014] Preferably, a rubber plate is fixedly connected to the side of the slide away from the motor, and a tooth groove matching the gear is opened on the side of the slide near the second ball screw.

[0015] The positive and progressive effects of this application are as follows:

[0016] The hydrostatic clamping device for thin-walled cylindrical parts provided in this embodiment of the invention has the following advantages:

[0017] 1. The clamping assembly can adaptively adjust to different workpiece sizes and shapes, better matching the shape and size of the workpiece being clamped, thereby reducing the time required for manual clamping and improving workpiece clamping efficiency.

[0018] 2. By setting up a fixing component structure, after the workpiece is clamped by the clamping component structure, the clamping component structure is fixed to the structure of the clamping component, thereby improving the clamping effect of the clamping component structure on the workpiece and improving the stability of the workpiece during the processing.

[0019] 3. During the contact process between the pressure plates and the workpiece, the pushing component structure prioritizes contact with the workpiece and defines its position, ensuring it is centered among the six pressure plates. The pushing component then pushes the workpiece so that one end fits tightly against the clamping cylinder, thus reducing the risk of deformation caused by the pressure plate structure when the workpiece is tilted.

[0020] 4. During the long-term clamping process of the pressure plate, the pressure plate structure can be replaced by disassembling the component structure to prevent slight deformation of the pressure plate surface after long-term operation, thereby ensuring the accurate use of the pressure plate structure. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic cross-sectional view of the front view portion of the structure of the present invention.

[0023] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0024] Figure 4 This is a schematic diagram of the clamping unit structure of the present invention.

[0025] Figure 5 This is a schematic diagram of the clamping assembly structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the disassembly and pushing components of the present invention.

[0027] Figure Descriptions: 1. Power box; 2. Clamping unit; 21. Clamping cylinder; 22. Motor; 23. Rotating shaft; 24. Fixing assembly; 241. First ball screw; 242. First push plate; 243. First limiting arc plate; 244. Auxiliary plate; 245. Second limiting arc plate; 25. Disassembly assembly; 251. Slide plate; 252. Second ball screw; 253. Gear; 254. Rubber plate; 255. Insert plate; 256. Triangular plate; 26. Clamping assembly; 26 1. Moving plate; 262. First spring; 263. First bevel gear; 264. Limiting rod; 265. Main force plate; 266. Second bevel gear; 267. Slider; 268. Third ball screw; 27. Pushing assembly; 271. Fixed shaft; 272. Pushing shaft; 273. Limiting ring; 274. Second spring; 275. Second push plate; 276. Clamping plate; 277. Rubber belt; 278. Tilting shaft; 28. Pressure plate; 29. ​​Protective plate; 3. Lathe. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] like Figure 1-6 As shown, the present invention is a hydrostatic clamping device for thin-walled cylindrical parts; it includes a lathe 3, a power box 1 fixedly connected to the top surface of the lathe 3, and a clamping unit 2 fixedly connected to the output end of the power box 1;

[0030] The clamping unit 2 includes a clamping cylinder 21 fixedly connected to the output end of the power box 1. The clamping cylinder 21 has a cavity inside. A motor 22 is fixedly connected to the inner wall of the clamping cylinder 21. A fixing component 24 is fixedly connected to the output end of the motor 22. The fixing component 24 is slidably connected to the inner wall of the rotating shaft 23. A clamping component 26 is fixedly connected to the outer wall of the rotating shaft 23. A pressure plate 28 is slidably connected to the right side of the fixing component 24. A disassembly component 25 is slidably connected between the clamping component 26 and the pressure plate 28. A pushing component 27 is rotatably connected to the bottom surface of the pressure plate 28. A protective plate 29 is fixedly connected to one side of each of the six pressure plates 28.

[0031] Specifically, when using this device, the clamping unit 2 needs to be activated by the power box 1 to clamp the workpiece. When the clamping unit 2 is activated, the motor 22 inside the clamping cylinder 21 drives the rotating shaft 23 to rotate. During the rotation of the rotating shaft 23, the fixing component 24 and the clamping component 26 structure are driven to operate. During the operation of the clamping component 26 structure, the pressure plate 28 structure is driven to clamp the workpiece. At the same time, the clamping component 26 can adaptively adjust according to different sizes and shapes of the workpiece, better adapting to the shape and size of the clamped workpiece, thereby reducing the time required for manual clamping and improving the workpiece clamping efficiency. By setting the fixing component 24 structure, after the clamping component 26 structure clamps the workpiece, the fixing component 24 structure fixes the structure of the clamping component 26, thereby improving the structural integrity of the clamping component 26. The structure effectively clamps the workpiece, improving its stability during processing. During the contact between the pressure plate 28 and the workpiece, the pushing component 27 prioritizes contact with the workpiece, defining its position and centering it at the center of the six pressure plates 28. The pushing component 27 then pushes the workpiece so that one end fits tightly against the clamping cylinder 21, reducing the deformation caused by the pressure plates 28 when the workpiece is tilted. During prolonged clamping, the pressure plate structure can be replaced by disassembling the component structure, preventing slight deformation of the pressure plate surface after extended use. This ensures accurate use of the pressure plate structure and facilitates disassembly and cleaning of the pressure plate 28 structure, preventing impurities from adhering to its surface and causing clamping instability.

[0032] Preferably, the clamping assembly 26 includes a second bevel gear 266 fixedly connected to the outer wall of the rotating shaft 23, a plurality of third ball screws 268 rotatably connected to the inner wall of the clamping cylinder 21, a slider 267 slidably connected to the outer wall of each of the six third ball screws 268 via threads, a first bevel gear 263 fixedly connected to the outer wall of the third ball screws 268, and the first bevel gear 263 meshing with the second bevel gear 266, a movable plate 261 slidably connected to the outer wall of the third ball screws 268, and the movable plate 261 being located between the first bevel gear 263 and the slider 267, a first spring 262 slidably sleeved on the outer wall of the third ball screws 268, and the first spring 262 being located between the movable plate 261 and the slider 267, and a main force plate 265 fixedly connected to the right side of the movable plate 261;

[0033] Specifically, when using the clamping assembly 26, the motor 22 starts and drives the rotating shaft 23 to rotate. The rotating shaft 23 drives the second bevel gear 266 structure, which is fixedly connected to the surface, to rotate. The second bevel gear 266 structure drives the first bevel gear 263 structure to rotate through gear meshing. The rotation of the first bevel gear 263 structure drives the third ball screw 268 structure to rotate. During the rotation, the third ball screw 268 structure drives the slider 267 structure to move towards the rotating shaft 23 through gears. During the movement, the rotating shaft 23 structure transmits pressure to the moving plate 261 through the first spring 262. This causes the moving plate 261 to drive the pressure plate 28 structure to clamp the part through the main force plate 265. This ensures that the moving distance of the pressure plate 28 perfectly matches the shape and size of the clamped workpiece, thereby reducing the time required for clamping and improving the processing efficiency of the device.

[0034] Preferably, the inner wall of the main power plate 265 is slidably connected to the limit rod 264, and the inner wall of the clamping cylinder 21 is provided with a sliding groove that matches the moving plate 261.

[0035] Specifically, the structure of the limit rod 264 serves to maintain the balance of the main force plate 265 during movement, and acts as an assist lever when the pressure plate 28 clamps the part, thereby ensuring the clamping force of the part and making the structure clamp the part stably.

[0036] Preferably, the fixing component 24 includes a first ball screw 241 that is threaded to the inner wall of the rotating shaft 23. A first push plate 242 is fixedly connected to the end of the first ball screw 241 away from the motor 22. A first limiting arc plate 243 is fixedly connected to the right end of the first push plate 242. An auxiliary plate 244 is fixedly connected to the end of the main force plate 265 near the first ball screw 241. A second limiting arc plate 245 is fixedly connected to the end of the auxiliary plate 244 near the rotating shaft 23, and the gap of the second limiting arc plate 245 matches that of the first limiting arc plate 243.

[0037] Specifically, a fixing component 24 is added to the clamping assembly 26 structure to maintain its stability during use, ensuring the stability of the workpiece during clamping. During rotation, the rotating shaft 23 drives the first ball screw 241 via a threaded connection. The first ball screw 241, through the first push plate 242, moves the first limiting arc plate 243 towards the auxiliary plate 244, causing the first limiting arc plate 243 to insert into the gap of the second limiting arc plate 245. This limits the position of the auxiliary plate 244, thereby fixing the pressure plate 28 and maintaining the sturdiness of the clamping assembly 26 structure during use, ensuring the stability of the workpiece during processing.

[0038] Preferably, the pushing assembly 27 includes two fixed shafts 271 fixedly connected to the side of the pressure plate 28 near the first ball screw 241. The end of the fixed shaft 271 away from the pressure plate 28 is rotatably connected to a flip shaft 278. The inner wall of the flip shaft 278 is slidably connected to a pushing shaft 272. A limit ring 273 is fixedly connected to the top of the pushing shaft 272. A second spring 274 is slidably connected between the limit ring 273 and the fixed shaft 271. The end of the pushing shaft 272 away from the fixed shaft 271 is rotatably connected to a second push plate 275. The side of the second push plate 275 near the pressure plate 28 is slidably connected to a clamping plate 276.

[0039] Specifically, as the pressure plate 28 gradually contacts the outer wall of the part, the second push plate 275 contacts the outer wall of the part first. The second push plate 275 clamps and pushes the outer wall of the part, so that one end of the part is tightly attached to one end surface of the clamping cylinder 21, thereby ensuring that the workpiece is placed horizontally. By connecting the second spring 274 to the inner wall of the flipping shaft 278, the second spring 274 provides assistance to the push shaft 272 through the limiting ring 273, thereby maintaining the pushing assistance of the second push plate 275 on the part. The addition of the push assembly 27 to the pressure plate 28 structure has the effect of prioritizing the fixation of the part position and has the effect of horizontally limiting the placement of the part, ensuring that one end of the part is kept in close contact with the clamping cylinder 21, thereby improving the safety of processing.

[0040] Preferably, a slot matching the card plate 276 is provided on the right side of the card plate 276, and the card plate 276 is fixed to one side of the first ball screw 241 using a rubber band 277.

[0041] Specifically, by setting a latch 276 to be movably connected to the second push plate 275 via a buckle, and then setting a rubber belt 277 to protect the position where the second push plate 275 contacts the workpiece, the second push plate 275 is prevented from causing wear on the workpiece surface during the pushing process, thereby ensuring the integrity of the workpiece surface. In addition, the buckle setting allows for quick replacement of the severely worn rubber belt 277, thus maintaining the usability of the rubber belt 277 structure.

[0042] Preferably, the disassembly assembly 25 includes an insert plate 255 fixedly connected to the side of the pressure plate 28 near the motor 22. Two second ball screws 252 are fixedly connected to the side of the insert plate 255 near the motor 22. Gears 253 are slidably connected to the outer wall of the second ball screws 252 via threads. Multiple slide plates 251 are slidably connected to the inner wall of the pressure plate 28. The slide plates 251 are located on the opposite side of the two gears 253. A rubber plate 254 is fixedly connected to the side of the slide plates 251 away from the motor 22. The side of the slide plates 251 near the second ball screws 252 has tooth grooves that match the gears 253.

[0043] Specifically, by setting up the disassembly component 25, the pressure plate 28 can be replaced. Simply push the slide plate 251 to release the limiting effect on the gear 253, and then pull the pressure plate 28 to separate the insert plate 255 from the main force plate 265. Then, the slide plate 251 is reset under the action of the rubber plate 254, thus completing the disassembly. The operation is simple, the disassembly speed is fast, and it will not affect the use of the pressure plate 28. By setting up the disassembly component 25, the pressure plate 28 can be disassembled and replaced, thus maintaining the clamping effect of the structure for a long time and preventing the part clamping from becoming unstable due to impurities or deformation on the surface of the pressure plate 28.

[0044] The work process is as follows:

[0045] When using this device, the clamping unit 2 needs to be started by the power box 1 to clamp the workpiece. When the clamping unit 2 is started, the motor 22 inside the clamping cylinder 21 drives the rotating shaft 23 to rotate. During the rotation of the rotating shaft 23, the fixing component 24 and the clamping component 26 structure are driven to operate. During the operation of the clamping component 26 structure, the pressure plate 28 structure is driven to clamp the workpiece. At the same time, the clamping component 26 can adaptively adjust according to the different sizes and shapes of the workpiece, better adapting to the shape and size of the clamped workpiece, thereby reducing the time required for manual clamping and improving the workpiece clamping efficiency. By setting the fixing component 24 structure after the clamping component 26 structure clamps the workpiece, the fixing component 24 structure fixes the structure of the clamping component 26, thereby improving the workpiece clamping effect of the clamping component 26 structure and improving the stability of the workpiece during the processing.

[0046] During the contact between the pressure plate 28 and the workpiece, the pushing component 27 structure prioritizes contact with the workpiece and limits the position of the workpiece, placing it at the center of the six pressure plates 28. Then, the pushing component 27 pushes the workpiece so that one end of the workpiece fits tightly against the clamping cylinder 21, thereby reducing the deformation caused by the pressure plate 28 structure when the workpiece is placed at an angle. During the long-term clamping of the pressure plate, the pressure plate structure can be replaced by disassembling the component structure to prevent slight deformation of the pressure plate surface after long-term operation, thus ensuring the accurate use of the pressure plate structure.

[0047] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A hydrostatic clamping device for thin-walled cylindrical parts, characterized in that, Includes a lathe (3), a power box (1) is fixedly connected to the top surface of the lathe (3), and a clamping unit (2) is fixedly connected to the output end of the power box (1); The clamping unit (2) includes a clamping cylinder (21) fixedly connected to the output end of the power box (1). The clamping cylinder (21) has a cavity inside. A motor (22) is fixedly connected to the inner wall of the clamping cylinder (21). A fixing component (24) is fixedly connected to the output end of the motor (22). A fixing component (24) is slidably connected to the inner wall of the rotating shaft (23). A clamping component (26) is fixedly connected to the outer wall of the rotating shaft (23). A pressure plate (28) is slidably connected to the right side of the fixing component (24). A disassembly component (25) is slidably connected between the clamping component (26) and the pressure plate (28). A pushing component (27) is rotatably connected to the bottom surface of the pressure plate (28). A protective plate (29) is fixedly connected to one side of each of the six pressure plates (28).

2. The hydrostatic clamping device for thin-walled cylindrical parts as claimed in claim 1, characterized in that: The clamping assembly (26) includes a second bevel gear (266) fixedly connected to the outer wall of the rotating shaft (23). Multiple third ball screws (268) are rotatably connected to the inner wall of the clamping cylinder (21). The outer walls of the six third ball screws (268) are all connected to sliders (267) by threads. The outer walls of the third ball screws (268) are fixedly connected to a first bevel gear (263), and the first bevel gear (263) meshes with the second bevel gear (266). The outer walls of the third ball screws (268) are slidably connected to a moving plate (261), and the moving plate (261) is located between the first bevel gear (263) and the slider (267). The outer walls of the third ball screws (268) are slidably sleeved with a first spring (262), and the first spring (262) is located between the moving plate (261) and the slider (267). The right side of the moving plate (261) is fixedly connected to a main force plate (265).

3. The hydrostatic clamping device for thin-walled cylindrical parts as claimed in claim 2, characterized in that: The inner wall of the main power plate (265) is slidably connected to the limit rod (264), and the inner wall of the clamping cylinder (21) is provided with a groove that matches the moving plate (261).

4. A hydrostatic clamping device for thin-walled cylindrical parts as claimed in claim 2, characterized in that: The fixing assembly (24) includes a first ball screw (241) threaded to the inner wall of the rotating shaft (23). A first push plate (242) is fixedly connected to the end of the first ball screw (241) away from the motor (22). A first limiting arc plate (243) is fixedly connected to the right end of the first push plate (242). An auxiliary plate (244) is fixedly connected to the end of the main force plate (265) near the first ball screw (241). A second limiting arc plate (245) is fixedly connected to the end of the auxiliary plate (244) near the rotating shaft (23). The gap of the second limiting arc plate (245) matches that of the first limiting arc plate (243).

5. A hydrostatic clamping device for thin-walled cylindrical parts as claimed in claim 1, characterized in that: The pushing assembly (27) includes two fixed shafts (271) fixedly connected to the side of the pressure plate (28) near the first ball screw (241). The end of the fixed shaft (271) away from the pressure plate (28) is rotatably connected to a flip shaft (278). The inner wall of the flip shaft (278) is slidably connected to a pushing shaft (272). The top end of the pushing shaft (272) is fixedly connected to a limit ring (273). A second spring (274) is slidably connected between the limit ring (273) and the fixed shaft (271). The end of the pushing shaft (272) away from the fixed shaft (271) is rotatably connected to a second push plate (275).

6. The hydrostatic clamping device for thin-walled cylindrical parts as claimed in claim 1, characterized in that: The second push plate (275) is slidably connected to the clamping plate (28) on the side near the pressure plate (28). The right side of the clamping plate (276) has a groove that matches the clamping plate (276). The clamping plate (276) is fixed to the side of the first ball screw (241) by a rubber band (277).

7. A hydrostatic clamping device for thin-walled cylindrical parts as claimed in claim 1, characterized in that: The disassembly assembly (25) includes a plate (255) fixedly connected to the side of the pressure plate (28) near the motor (22). Two second ball screws (252) are fixedly connected to the side of the plate (255) near the motor (22). Gears (253) are slidably connected to the outer wall of the second ball screws (252) via threads. Multiple slide plates (251) are slidably connected to the inner wall of the pressure plate (28). The slide plates (251) are located on the opposite side of the two gears (253).

8. A hydrostatic clamping device for thin-walled cylindrical parts as claimed in claim 7, characterized in that: A rubber plate (254) is fixedly connected to the side of the slide plate (251) away from the motor (22). The slide plate (251) has a tooth groove that matches the gear (253) on the side of the slide plate (251) near the second ball screw (252).

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