A clamping device

Abstract

The utility model discloses a clamping device relates to mechanical processing clamp technical field, it includes: base for connecting external mechanical hand, base includes first sleeve and connecting disc, and the connecting disc is sleeved in the first end of first sleeve, positioning piece includes second sleeve and bottom disc, and the first end of second sleeve is inserted into work piece, and the second end of second sleeve is inserted into first sleeve and is fixedly connected with first sleeve, and the bottom disc is fixed in the first end of second sleeve, and bracing assembly is sleeved in second sleeve, and the first end of tensioning screw is used for connecting external power mechanism, and the second end of tensioning screw passes through the first sleeve of base and is connected with the first end of second sleeve, wherein, through the screwing of tensioning screw, drive first sleeve and bottom disc relative movement to extrude bracing assembly, make bracing assembly produce radial elastic deformation to bracing work piece inner wall, from inside bracing work piece, provide flexible, evenly distributed clamping force, effectively avoided the work piece deformation caused by rigid clamping.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a clamping device. Background Technology

[0002] In the production of faucets, grinding and polishing are key surface treatment processes that directly affect the product's appearance and smoothness. Currently, robotic clamping devices are widely used to fix faucet workpieces to ensure the stability of the grinding and polishing operation. Existing clamping devices mostly employ dedicated designs for specific faucet workpiece specifications. When the product model changes, the entire clamping fixture needs to be replaced or cumbersome adjustments need to be made, resulting in poor adaptability and low changeover efficiency. Furthermore, some fixtures use rigid clamping methods, leading to uneven clamping force, which can easily cause deformation of thin-walled faucet workpieces or displacement under grinding and polishing vibrations, affecting processing accuracy and product yield. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a clamping device that can stably clamp faucet workpieces of different specifications, prevent workpiece deformation, and enable rapid production changeover.

[0004] This utility model provides a clamping device for fixing a tubular workpiece for processing, comprising: a base for connecting an external robot arm; the base includes a first sleeve and a connecting plate, the connecting plate being sleeved on the first end of the first sleeve; a positioning element including a second sleeve and a base plate; the first end of the second sleeve extends into the workpiece; the second end of the second sleeve extends into the first sleeve and is fixedly connected to the first sleeve; the base plate is fixed to the first end of the second sleeve; a tensioning assembly sleeved on the second sleeve; a tensioning screw, the first end of which is used to connect to an external power mechanism, the second end of which passes through the first sleeve of the base and is connected to the first end of the second sleeve; wherein, by tightening the tensioning screw, the first sleeve and the base plate are driven to move relative to each other to compress the tensioning assembly, causing the tensioning assembly to produce radial elastic deformation to tension the inner wall of the workpiece.

[0005] As an improvement to the above solution, the tensioning assembly includes at least one flexible tensioning block, which is sleeved on the outside of the second sleeve.

[0006] As an improvement to the above solution, the tensioning assembly includes: a clamping block, sleeved on the outside of the second sleeve, the clamping block being located between the tensioning block and the chassis; and a protective sleeve, sleeved on the outside of the second sleeve, the clamping block being located between the tensioning block and the first sleeve.

[0007] As an improvement to the above solution, the first end of the second sleeve is provided with a mounting groove, a connecting block is fixed in the mounting groove, and a tensioning screw hole matching the second end of the tensioning screw is opened on the connecting block.

[0008] As an improvement to the above solution, the clamping block is sleeved on the outside of the mounting groove, one end of the connecting block is fixedly connected to the mounting groove by screws, and the other end of the connecting block is connected to the screw hole on the clamping block by screws.

[0009] As an improvement to the above solution, the second end of the first sleeve is provided with a first screw hole in the circumferential direction, and the second end of the second sleeve is provided with a second screw hole corresponding to the first screw hole in the circumferential direction. The first sleeve and the second sleeve are fixedly connected by connecting screws passing through the first screw hole and the second screw hole.

[0010] As an improvement to the above solution, at least one buffer pad is fixed on the side of the chassis away from the second sleeve.

[0011] As an improvement to the above solution, the protective sleeve includes a first sleeve body and a second sleeve body. The first sleeve body abuts against the first sleeve, and the cross-sectional radius of the first sleeve body is equal to the cross-sectional radius of the first sleeve. The second sleeve body abuts against the support block, and the cross-sectional radius of the second sleeve body is equal to the cross-sectional radius of the support block.

[0012] As an improvement to the above solution, the tensioning block is a polyurethane block.

[0013] As an improvement to the above solution, the tensioning screw is an M8 tensioning screw, and the connecting screw is an M6 locking screw.

[0014] The beneficial effects of implementing this utility model are as follows:

[0015] This utility model discloses a clamping device that drives the base and positioning component to move relative to each other via a tension screw. This causes the support block, made of urethane rubber, to undergo uniform radial elastic deformation, thus clamping the workpiece from the inside. This provides a flexible and evenly distributed clamping force, effectively preventing workpiece deformation and displacement during grinding and polishing caused by rigid clamping. The base and positioning component are connected by screws and can be quickly separated. For workpieces with different inner diameters, only the outer diameter-matching support component needs to be replaced, eliminating the need to replace the entire fixture. This significantly improves changeover efficiency and enables flexible production. The entire device has a compact structure, low manufacturing and maintenance costs, reliable connections, and a long service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a clamping device according to an embodiment of this application;

[0017] Figure 2This is an exploded view of the structure of a clamping device according to an embodiment of this application;

[0018] Figure 3 This is an exploded view of a partial structure of a clamping device according to an embodiment of this application.

[0019] The reference numerals in the attached drawings are explained as follows: 100, base; 110, first sleeve; 120, connecting plate; 130, connecting screw; 200, positioning component; 210, second sleeve; 211, mounting groove; 212, connecting block; 220, chassis; 221, buffer pad; 300, tensioning assembly; 310, clamping block; 320, tensioning block; 330, protective sleeve; 400, tensioning screw; 500, workpiece. Detailed Implementation

[0020] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0021] See Figures 1-2 , Figure 1 This is a schematic diagram of the structure of a clamping device according to an embodiment of this application; Figure 2This is an exploded view of a clamping device according to an embodiment of this application. As shown, the device is used to fix a faucet workpiece 500 for processing, and includes: a base 100 for connecting an external robotic arm; the base 100 includes a first sleeve 110 and a connecting plate 120, the connecting plate 120 being sleeved on the first end of the first sleeve 110; a positioning member 200, including a second sleeve 210 and a base plate 220; the first end of the second sleeve 210 extends into the workpiece 500; the second end of the second sleeve 210 extends into the first sleeve 110 and is fixed to the first sleeve 110. The base 220 is fixed to the first end of the second sleeve 210; a clamping assembly 300 is sleeved on the second sleeve 210; a tensioning screw 400 has its first end connected to an external power mechanism, and its second end passes through the first sleeve 110 of the base 100 and connects to the first end of the second sleeve 210; wherein, by tightening the tensioning screw 400, the first sleeve 110 and the base 220 are driven to move relative to each other to compress the clamping assembly 300, causing the clamping assembly 300 to undergo radial elastic deformation to clamp the inner wall of the workpiece 500. By driving the base 100 and the positioning member 200 to move relative to each other through the tensioning screw 400, the clamping block 320 made of urethane rubber is compressed to undergo uniform radial elastic deformation, clamping the workpiece 500 from the inside, providing a flexible and evenly distributed clamping force, effectively avoiding deformation of the workpiece 500 and displacement during grinding and polishing caused by rigid clamping. The base 100 and the positioning component 200 are connected by screws and can be quickly separated. For workpieces 500 with different inner diameters, only the outer diameter matching clamping component 300 needs to be replaced, without replacing the entire fixture, which greatly improves changeover efficiency and realizes flexible production. The whole device has a compact structure, low manufacturing and maintenance costs, reliable connection, and long service life.

[0022] See Figure 2 and Figure 3 , Figure 3 This is an exploded view of a partial structure of a clamping device according to an embodiment of this application.

[0023] Furthermore, in this embodiment, the clamping assembly 300 includes a flexible clamping block 320, which is sleeved on the outside of the second sleeve 210. The flexible clamping block 320 is the core component that generates elastic deformation. It ensures that the clamping force is flexible and uniformly distributed, thereby adapting to the slight irregularities of the inner wall of the workpiece 500 and effectively preventing indentation or deformation of the thin-walled faucet workpiece 500 that may be caused by rigid clamping.

[0024] Preferably, the clamping block 320 is a urethane block. Urethane blocks (polyurethane elastomer) possess excellent wear resistance, high elasticity, tear resistance, and oil resistance. Compared to ordinary rubber, it has a longer service life under harsh working conditions such as grinding and polishing, a higher elastic recovery rate, and can provide a more stable and durable clamping force, thereby ensuring the consistency and reliability of the clamping effect.

[0025] Furthermore, in this embodiment, the tensioning assembly 300 further includes: a clamping block 310, sleeved on the outside of the second sleeve 210, the clamping block 310 being located between the tensioning block 320 and the chassis 220; and a protective sleeve 330, sleeved on the outside of the second sleeve 210, the clamping block 310 being located between the tensioning block 320 and the first sleeve 110. The clamping block 310 evenly transmits the concentrated force from the tensioning screw 400 to the flexible tensioning block 320, avoiding stress concentration and protecting the tensioning block 320. The protective sleeve 330 directly contacts the inner wall of the workpiece 500, protecting the surface of the workpiece 500 from scratches and protecting the tensioning block 320 from grinding and polishing dust contamination and mechanical wear, extending the service life of the core elastic element. Simultaneously, the protective sleeve 330 is detachable, significantly improving the efficiency of workpiece 500 assembly and disassembly, and saving processing time.

[0026] Preferably, the protective sleeve 330 includes a first sleeve body and a second sleeve body. The first sleeve body abuts against the first sleeve 110, and the cross-sectional radius of the first sleeve body is equal to the cross-sectional radius of the first sleeve 110. The second sleeve body abuts against the support block 320, and the cross-sectional radius of the second sleeve body is equal to the cross-sectional radius of the support block 320. Specifically, the first sleeve body is located outside the workpiece 500, and the second sleeve body extends into the workpiece 500. The outer diameter of the first sleeve body is equal to that of the first sleeve 110, forming a smooth transition, which facilitates the fitting of the workpiece 500 and prevents unnecessary interference at this point. The outer diameter of the second sleeve body is equal to that of the support block 320, ensuring that the radial deformation energy of the support block 320 is transmitted to the protective sleeve 330 without loss, thereby acting efficiently on the inner wall of the workpiece 500 and ensuring clamping efficiency. As an improvement to the above solution, the first end of the second sleeve 210 is provided with a mounting groove 211, and a connecting block 212 is fixed in the mounting groove 211. The connecting block 212 is provided with a tensioning screw hole that matches the second end of the tensioning screw 400.

[0027] See Figure 3Furthermore, in this embodiment, the first end of the second sleeve 210 is provided with a mounting groove 211, and a connecting block 212 is fixed in the mounting groove 211. The connecting block 212 has a tensioning screw hole that matches the second end of the tensioning screw 400. The connecting block 212 in the mounting groove 211 provides a robust and reliable internal anchor point for engaging with the tensioning screw 400. It converts the rotational motion of the screw into a reliable linear tension and smoothly transmits this tension to the clamping block 310, ensuring efficient and stable force transmission.

[0028] See Figure 3 Furthermore, in this embodiment, the clamping block 310 is sleeved on the outside of the mounting groove 211, one end of the connecting block 212 is fixedly connected to the mounting groove 211 by screws, and the other end of the connecting block 212 is connected to the screw hole on the clamping block 310 by screws. Through this detachable mechanical connection, the clamping block 310 is firmly fixed to the internal transmission mechanism, ensuring the connection rigidity and reliability of the structure under repeated high-load operation, and preventing loosening or abnormal noise.

[0029] See Figure 2 Furthermore, in this embodiment, the second end of the first sleeve 110 is provided with a first threaded hole in the circumferential direction, and the second end of the second sleeve 210 is provided with a second threaded hole corresponding to the first threaded hole in the circumferential direction. The first sleeve 110 and the second sleeve 210 are fixedly connected by a connecting screw 130 passing through the first threaded hole and the second threaded hole. By removing the screws, the entire positioning component 200 and the tensioning component 300 module can be separated from the base 100, which facilitates the quick replacement of tensioning components 300 of different specifications to adapt to new workpieces 500, greatly improving equipment utilization and production efficiency.

[0030] See Figure 3 Furthermore, in this embodiment, three buffer pads 221 are fixed on the side of the chassis 220 away from the second sleeve 210. When the chassis 220 comes into contact with the squeezed component, the buffer pads 221 can provide flexible cushioning, absorb impact energy, reduce hard collision noise and wear between metal parts, and also help protect the support block 320, improving the durability and smoothness of operation of the entire device.

[0031] Preferably, the tensioning screw 400 is an M8 tensioning screw, and the connecting screw 130 is an M6 locking screw.

[0032] Preferably, the external power mechanism is a pneumatic cylinder or a hydraulic cylinder.

[0033] As can be seen from the above, the clamping device of this utility model drives the base and the positioning component to move relative to each other through a tension screw. This causes the support block made of urethane rubber to undergo uniform radial elastic deformation, thus supporting the workpiece from the inside and providing a flexible and evenly distributed clamping force. This effectively avoids workpiece deformation and displacement during grinding and polishing caused by rigid clamping. The base and the positioning component are connected by screws and can be quickly separated. For workpieces with different inner diameters, only the support component with a matching outer diameter needs to be replaced, without replacing the entire fixture, which greatly improves changeover efficiency and realizes flexible production. The entire device has a compact structure, low manufacturing and maintenance costs, reliable connection, and long service life.

[0034] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A clamping device for fixing a tubular workpiece for machining, characterized in that, include: A base for connecting an external robotic arm; the base includes a first sleeve and a connecting plate, the connecting plate being sleeved on the first end of the first sleeve; The positioning component includes a second sleeve and a base; the first end of the second sleeve extends into the workpiece; the second end of the second sleeve extends into the first sleeve and is fixedly connected to the first sleeve; the base is fixed to the first end of the second sleeve. The tensioning component is fitted onto the second sleeve; A tensioning screw, the first end of which is used to connect to an external power mechanism, and the second end of the tensioning screw passes through the first sleeve of the base and is connected to the first end of the second sleeve; Specifically, by tightening the tensioning screw, the first sleeve and the chassis are driven to move relative to each other to compress the tensioning assembly, causing the tensioning assembly to produce radial elastic deformation to tighten the inner wall of the workpiece.

2. The clamping device according to claim 1, characterized in that, The tensioning assembly includes at least one flexible tensioning block, which is sleeved on the outside of the second sleeve.

3. The clamping device according to claim 2, characterized in that, The tensioning component includes: A clamping block is fitted onto the outside of the second sleeve, and the clamping block is located between the support block and the chassis; A protective sleeve is fitted over the outside of the second sleeve, and the clamping block is located between the support block and the first sleeve.

4. The clamping device according to claim 3, characterized in that, The first end of the second sleeve is provided with a mounting groove, and a connecting block is fixed in the mounting groove. The connecting block is provided with a tensioning screw hole that matches the second end of the tensioning screw.

5. The clamping device according to claim 4, characterized in that, The clamping block is sleeved on the outside of the mounting groove. One end of the connecting block is fixedly connected to the mounting groove by a screw, and the other end of the connecting block is connected to the screw hole on the clamping block by a screw.

6. The clamping device according to claim 2, characterized in that, The first sleeve has a first threaded hole circumferentially formed at its second end, and the second sleeve has a second threaded hole circumferentially formed at its second end corresponding to the first threaded hole. The first sleeve and the second sleeve are fixedly connected by connecting screws passing through the first threaded hole and the second threaded hole.

7. The clamping device according to claim 1, characterized in that, At least one cushioning pad is fixed to the side of the chassis away from the second sleeve.

8. The clamping device according to claim 3, characterized in that, The protective sleeve includes a first sleeve body and a second sleeve body. The first sleeve body abuts against the first sleeve, and the cross-sectional radius of the first sleeve body is equal to the cross-sectional radius of the first sleeve. The second sleeve body abuts against the support block, and the cross-sectional radius of the second sleeve body is equal to the cross-sectional radius of the support block.

9. The clamping device according to claim 2, characterized in that, The support block is a polyurethane block.

10. The clamping device according to claim 6, characterized in that, The tensioning screw is an M8 tensioning screw, and the connecting screw is an M6 locking screw.

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