Multi-conducting-rod three-supporting-column insulator conducting tube machining tool
By designing a multi-conductor rod three-post insulator conductive tube processing fixture, the problem of low precision of conductive tubes was solved, achieving an efficient and stable processing process and improving product quality.
Patent Information
- Application Number
- CN202422984623.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing three-post insulator conductive tubes have low precision, and traditional precision machining methods lead to error accumulation, high product scrap rate, and low processing stability and efficiency.
The tooling for processing conductive tubes using a multi-conductor rod three-post insulator includes a clamp and a plug. The clamp engages with the inner wall of the conductive tube, the mounting plate connects to the machine tool chuck, the support arm enables circumferential rotation, axial sliding, and radial centering, and the plug connects to the machine tool tailstock to achieve high coaxiality positioning of the conductive tube, reduce the number of clamping and positioning operations, and avoid error accumulation.
It improves processing accuracy, reduces error accumulation, lowers product scrap rate, and improves production efficiency and product quality.
Smart Images
Figure CN223544749U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a workpiece clamping device, and more particularly to a tooling for processing conductive tubes of multi-conductive rod three-post insulators. Background Technology
[0002] Three-post insulators, as key components in ultra-high voltage and extra-high voltage equipment, play a role in supporting and connecting busbars. Their electrical performance and mechanical strength directly affect the operational stability of transmission lines. Three-post insulators are complex parts cast from a mixture of epoxy resin and fillers. They consist of a disc and three pillars evenly distributed along the circumference of the disc and extending radially along the disc. A central hole is opened in the disc, and a truncated ring-shaped conductive tube is coaxially arranged there, extending axially. In the case of multiple conductive rods, the three-post insulator has three conductive tubes evenly distributed on a circle centered on the disc. The disc has a central hole. In actual use, high precision is required for the outer diameter of the conductive tubes. Due to limitations in the manufacturing process, this cannot be guaranteed during molding and requires precision machining to ensure product accuracy.
[0003] Traditional finishing methods involve processing each conductive tube sequentially. After each processing, the three-post insulator needs to be reinstalled and repositioned. As the number of installations and repositionings increases, it can cause significant errors, resulting in a high product scrap rate. Furthermore, due to the special structure and the limited spacing between conductive tubes, traditional finishing methods are difficult to process, have poor processing stability, and are inefficient. Utility Model Content
[0004] The purpose of this utility model is to provide a tooling for processing conductive tubes of multi-conducting rod three-post insulators, so as to solve the problem of low precision of existing three-post insulator conductive tube products.
[0005] The machining tooling for the multi-conducting rod, three-post insulator, and conductive tube of this utility model adopts the following technical solution:
[0006] A machining fixture for conductive tubes in multi-conductor three-post insulators includes a clamp and a plug. One end of the clamp has a tapered outer profile to mate with the inner wall of the conductive tube during operation, and the other end is a connecting section for mates with a machine tool chuck. The clamp is fixedly connected to a mounting plate, on which a support arm is mounted for passing through the central hole of the multi-conductor three-post insulator and engaging with the insulator in a circumferential rotational fit, an axial sliding fit, and a radial centering fit. One end of the plug has a connecting hole for connecting with a movable ejector pin of the machine tool tailstock, and the other end has a tapered clamping section for inserting into the central hole of the conductive tube to press the conductive tube tightly against the clamp.
[0007] Furthermore, the support arm includes a support rod, on which a sliding sleeve is provided for rotating with the center hole of the multi-conducting rod three-post insulator. The end of the sliding sleeve near the mounting plate is provided with a protrusion along the radial direction of the support rod to limit the position of the multi-conducting rod three-post insulator.
[0008] Furthermore, the sliding sleeve is a nylon sliding sleeve.
[0009] Furthermore, a claw device is installed on the outer wall of the end of the sliding sleeve away from the mounting plate by opening a mounting groove. A rotating shaft with a different plane perpendicular to the support rod is provided in the mounting groove. The claw device includes a clamping plate. The clamping plate has a through hole corresponding to the rotating shaft to realize the radial swing of the clamping plate along the support rod. A protrusion is provided on the side of the clamping plate facing away from the support rod. This protrusion and the sliding sleeve together realize the axial limitation of the three-post insulator of the multi-conducting rod. A tension spring is provided for the clamping plate.
[0010] Furthermore, an anti-detachment block is fixedly installed at the end of the support rod away from the mounting plate. The anti-detachment block cooperates with the sliding sleeve to stop, and the outer contour dimension of the anti-detachment block is smaller than the diameter of the central hole of the three-post insulator of the multi-conducting rod.
[0011] Furthermore, an ejector spring is fitted onto the support rod. The ejector spring is positioned between the sliding sleeve and the mounting plate and is used to provide an ejector force to the sliding sleeve so that the conductive tube can be dislodged from the clamp when changing the processing position.
[0012] Furthermore, the mounting plate is provided with mounting holes for mounting support rods, and the end of the support rod is provided with a mounting section that is inserted into the mounting hole. There is a stepped surface between the mounting section and other parts of the support rod that is stopped by the corresponding side of the mounting plate. A fixing end cap that is stopped by the other side of the mounting plate is fixedly connected to the end of the mounting section.
[0013] Furthermore, a counterweight is provided at the end of the mounting plate away from the support arm to adjust the center of gravity so that it coincides with the center of rotation.
[0014] Furthermore, the counterweight is fixedly mounted on the mounting plate using hexagon socket head cap screws.
[0015] Furthermore, the clip head is connected to the mounting plate via a flange.
[0016] Beneficial Effects: This utility model is a pioneering invention. The machining fixture for multi-conductor three-post insulators of this utility model includes a clamp and a plug. One end of the clamp has a tapered outer contour to mate with the inner wall of the conductive tube during operation. The other end is a connecting section for mates with a machine tool chuck, ensuring high coaxiality between the multi-conductor three-post insulator and the machine tool spindle, and preventing radial runout of the multi-conductor three-post insulator during machining. The clamp is fixedly connected to a mounting plate, on which a support is installed for circumferential rotation, axial sliding, and radial centering fits between the clamp and the multi-conductor three-post insulator through the central hole. The arm has a connecting hole at one end of the plug for connecting with the movable ejector pin of the machine tool tailstock, and a tapered clamping section at the other end for inserting into the center hole of the conductive tube to press the conductive tube against the chuck. The plug and chuck clamp together to achieve the positioning of the conductive tube to be processed, ensuring the coaxiality of the processing part and the machine tool spindle. This can prevent the conductive tube of the multi-conductive rod three-post insulator from deforming due to eccentric force during processing. The processing position can be changed by rotating the support arm of the multi-conductive rod three-post insulator, reducing the number of clamping and positioning times, avoiding error accumulation, improving processing accuracy, and effectively improving product quality. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a structural embodiment of the multi-conducting rod three-post insulator conductive tube processing fixture of this utility model;
[0018] Figure 2 for Figure 1 Side view;
[0019] Figure 3 for Figure 1 A schematic diagram of the rotation process;
[0020] Figure 4 for Figure 3 Side view;
[0021] Figure 5 for Figure 1 A magnified view of the middle gripper device.
[0022] In the diagram: 1. Clamping head; 2. Mounting plate; 3. Support rod; 4. Conductive tube; 5. Clamping claw device; 6. Boring tool; 7. Fixed end cap; 8. Sliding sleeve; 9. Ejection spring; 10. Multi-conductor rod three-post insulator; 11. Movable ejector pin; 12. Plug; 13. Counterweight; 14. Anti-detachment block; 15. Tool holder; 16. Clamping plate; 17. Rotating shaft; 18. Tensioning spring; 19. Positioning bolt; 20. Guide bolt. Detailed Implementation
[0023] The features and performance of this utility model will be further described in detail below with reference to the embodiments.
[0024] Traditional fixtures cannot meet the processing requirements of existing multi-conductor rod three-post insulators, resulting in low processing accuracy and poor production efficiency. Therefore, there is an urgent need for a processing fixture specifically designed for multi-conductor rod three-post insulators. The inventive concept of this invention is to set up a rotating shaft, allowing the multi-conductor rod three-post insulator to be rotated on the shaft to switch processing positions, avoiding multiple clamping and positioning steps.
[0025] Based on the above ideas, such as Figure 1 , 2 As shown, in a basic embodiment, the machining fixture for the conductive tube of the multi-conducting rod three-post insulator of this utility model includes a chuck 1 and a plug 12. One end of the chuck 1 has a tapered outer profile to mate with the inner wall of the conductive tube 4 during operation. The other end is a connecting section for mates with a machine tool chuck, ensuring a high coaxiality between the multi-conducting rod three-post insulator 10 and the machine tool spindle, and preventing radial runout of the multi-conducting rod three-post insulator 10 during machining. The chuck 1 is fixedly connected to a mounting plate 2, on which are mounted a device for passing through the center hole of the multi-conducting rod three-post insulator 10 and engaging with the multi-conducting rod three-post insulator 10 in a circumferential rotational fit and an axial sliding fit. The radially centering support arm has a plug 12 with a connection hole at one end for connecting to the movable ejector pin 11 of the machine tool tailstock, and a tapered clamping section at the other end for inserting into the center hole of the conductive tube to clamp the conductive tube onto the chuck 1. The plug 12 and the chuck 1 clamp together to achieve the positioning of the conductive tube 4 to be processed, ensuring the coaxiality of the processing part and the machine tool spindle. This can prevent the conductive tube 4 of the multi-conductive rod three-post insulator 10 from deforming due to eccentric force during processing. The processing position can be changed by rotating the support arm of the multi-conductive rod three-post insulator 10, reducing the number of clamping and positioning times, avoiding error accumulation, improving processing accuracy, and effectively improving product quality.
[0026] In a preferred embodiment, the support arm includes a support rod 3 parallel to the machine tool spindle axis. A sliding sleeve 6 is provided on the support rod for rotatably engaging with the center hole of the multi-conducting rod three-post insulator 10. The end of the sliding sleeve 6 near the mounting plate 2 has a radial protrusion along the support rod 3 to limit the movement of the multi-conducting rod three-post insulator 10. When changing processing positions, the multi-conducting rod three-post insulator 10 must first be disengaged from the chuck 1, and the entire multi-conducting rod three-post insulator 10 needs to move along the support rod 3 towards the tailstock. The sliding sleeve 8 reduces the friction experienced by the multi-conducting rod three-post insulator 10 during sliding, reducing the difficulty of repositioning the multi-conducting rod three-post insulator 10. In other embodiments, the sliding sleeve 8 is not provided, and the multi-conducting rod three-post insulator is directly inserted into the support rod 3. Although this results in greater friction and a shorter tooling lifespan, it can still function normally.
[0027] In a preferred embodiment, the sliding sleeve 8 is a nylon sliding sleeve. The nylon sliding sleeve can form a lubricating film between the sliding contact surfaces, thereby reducing frictional resistance and extending the service life of the parts. Simultaneously, the nylon sliding sleeve also possesses good self-lubricating properties, reducing heat accumulation during friction, improving the operating efficiency of the machine transmission, and reducing maintenance costs and complexity. The sliding sleeve 8 has bolt holes for anti-rotation engagement between the sliding sleeve 8 and the support rod 3, which is achieved by installing guide bolts 20. In other embodiments, although using a metal sliding sleeve may easily lead to collisions and damage with the multi-conducting rod three-post insulator 10, it can still function normally.
[0028] like Figure 5 As shown, in a preferred embodiment, a claw device 5 is installed on the outer wall of the end of the sliding sleeve 8 away from the mounting plate 2 by opening a mounting groove. A rotating shaft 17 with its opposite plane perpendicular to the support rod 3 is provided in the mounting groove. The claw device 5 includes a clamping plate 16. The clamping plate 16 has a through hole corresponding to the rotating shaft 17 to realize the radial swing of the clamping plate 16 along the support rod 3. A protrusion is provided on the side of the clamping plate 16 facing away from the support rod 3. The protrusion and the sliding sleeve 8 together realize the axial positioning of the multi-conducting rod three-post insulator 10. A tension spring 18 is provided for the clamping plate 16. There is a radial opening on the support rod 3. A positioning bolt 19 is provided in the hole. The positioning bolt 19 restricts the opening and closing position of the claw device. The chuck device 5 and the sliding sleeve 8 together limit the axial movement of the multi-conducting rod three-post insulator 10. During the process of changing the machining position and moving the conductive tube 4, this prevents the multi-conducting rod three-post insulator 10 from falling off the sliding sleeve 8 and the support rod 3, thus avoiding affecting the machining accuracy of the multi-conducting rod three-post insulator 10. In other embodiments, the chuck device 5, by incorporating a torsion spring structure, can also allow the chuck plate to swing axially, thereby limiting the movement of the multi-conducting rod three-post insulator 10 and ensuring normal operation.
[0029] In a preferred embodiment, an anti-detachment block 14 is fixedly installed at the end of the support rod 3 away from the mounting plate 2. The anti-detachment block 14 engages with the sliding sleeve 8. The outer contour dimension of the anti-detachment block 14 is smaller than the diameter of the central hole of the multi-conducting rod three-post insulator 10. Without affecting the installation and disassembly of the multi-conducting rod three-post insulator 10, the anti-detachment block 14 ensures that when the processing position is changed, the sliding sleeve will not fall off the support rod 3 as it moves towards the tailstock with the sliding sleeve 8, preventing collision damage between the multi-conducting rod three-post insulator 10 and the tooling, and avoiding affecting the processing accuracy of the multi-conducting rod three-post insulator 10. In other embodiments, the anti-detachment block 14 is not provided. By reasonably designing the length of the support rod 3, the risk of the sliding sleeve 8 or the multi-conducting rod three-post insulator 10 falling off the support rod 3 can also be reduced, allowing for normal operation.
[0030] In a preferred embodiment, a push-out spring 9 is inserted into the support rod 3. The push-out spring 9 is disposed between the sliding sleeve 8 and the mounting plate 2, and is used to provide a push-out force to the sliding sleeve to disengage the conductive tube 4 from the clamp when changing the processing position. By providing the push-out spring 9, a pushing force can be applied to the sliding sleeve 8 during processing, so that the sliding sleeve 8 fits against the multi-conductive rod three-post insulator 10. At the same time, it can also reduce the difficulty of removing the conductive tube 4 from the clamp when changing the processing position or disassembling the multi-conductive rod three-post insulator 10. In other embodiments, the push-out spring may not be provided. Although it is more difficult to move the multi-conductive rod three-post insulator when changing the processing position, it can still work normally.
[0031] In a preferred embodiment, the mounting plate 2 has mounting holes for mounting the support rod 3. The end of the support rod 3 has a mounting section that inserts into the mounting holes. A stepped surface, which engages with the corresponding side of the mounting plate 2, is provided between the mounting section and other parts of the support rod 3. A fixing end cap 7, which engages with the other side of the mounting plate 2, is fixedly connected to the end of the mounting section. The fixing end cap 7 and the limiting structure clamp the mounting plate 2 to achieve fixed support for the support rod 3. In other embodiments, the support rod 3 and the mounting plate 2 are connected by a flange, achieving the same effect and allowing normal operation.
[0032] In a preferred embodiment, a counterweight 13 is provided at the end of the mounting plate away from the support arm to adjust the center of gravity so that it coincides with the center of rotation. The weight of the counterweight 13 is balanced with the weight of the mounting part of the multi-conducting rod three-post insulator 10, preventing excessive eccentric force caused by the center of gravity deviating from the center during processing, which could damage the tooling or the multi-conducting rod three-post insulator 10. In other embodiments, although omitting the counterweight 13 may easily lead to excessive eccentric force and reduce the service life of the tooling, it can still function normally.
[0033] In a preferred embodiment, the counterweight 13 is fixedly mounted on the mounting plate 2 by hexagon socket head cap screws, which provides a stable connection and makes disassembly and assembly convenient and quick. In other embodiments, the counterweight 13 is fixed to the mounting plate 2 by welding, which can also achieve a similar effect and allow it to work normally.
[0034] In a preferred embodiment, the clamp 1 and the mounting plate 2 are connected by a flange, which provides a secure connection, facilitates disassembly, and reduces maintenance and replacement difficulties. In other embodiments, the clamp 1 and the mounting plate 2 are fixed by welding, which also allows for normal operation.
[0035] The tool selected for machining is boring bar 6. Due to the compact position of the three conductive tubes 4 and the small machining space, using boring bar 6 can improve the acoustic field efficiency. Boring bar 6 is a reverse boring bar, with the cutting edge direction opposite to that of a standard boring bar. During machining, it turns from the inside out, which can reduce machining deformation, improve dimensional and shape stability, and improve machining accuracy.
[0036] like Figure 3 , 4 As shown, during processing, the multi-conducting rod three-post insulator conductive tube 4 processing fixture is first fixed on the machine tool chuck by the chuck 1 and the positioning is adjusted. Then, the center hole of the multi-conducting rod three-post insulator 10 is inserted into the sliding sleeve 8 of the support rod 3. The chuck plate of the chuck device 5 is pressed so that the multi-conducting rod three-post insulator 10 can pass through and be clamped. Then, the multi-conducting rod three-post insulator 10 is rotated so that the conductive tube 4 of the processing part is inserted into the chuck 1. The tailstock is moved to push the multi-conducting rod three-post insulator 10 towards the chuck 1 through the plug 12 and locks it. The tool holder 15 is adjusted to reset to zero. The multi-conducting rod three-post insulator 10 is processed by the boring tool 6 through the processing program. After machining is completed, the tool holder 15 is reset, the lathe is stopped, the plug 12 is removed, the ejector spring 9 and the sliding sleeve 8 are operated to move the multi-conductive rod three-post insulator 10 away from the chuck 1 along with the sliding sleeve 8 and the chuck device 5 until the conductive tube 4 is completely dislodged from the chuck 1. The multi-conductive rod three-post insulator 10 is rotated to the next machining position, and the above operation is repeated until machining is completed.
[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.
Claims
1. A tooling for processing conductive tubes in multi-conductor rod three-post insulators, characterized in that, The multi-conducting rod three-post insulator conductive tube processing fixture includes a clamp and a plug. One end of the clamp has a tapered outer contour to mate with the inner wall of the conductive tube during operation, and the other end is a connecting section for mates with a machine tool chuck. The clamp is fixedly connected to a mounting plate, and the mounting plate is equipped with a support arm for passing through the center hole of the multi-conducting rod three-post insulator and mates with the multi-conducting rod three-post insulator in a circumferential rotational fit, axial sliding fit, and radial centering fit. One end of the plug is provided with a connecting hole for mates with a movable ejector pin of the machine tool tailstock, and the other end is provided with a tapered clamping section for inserting into the center hole of the conductive tube to press the conductive tube against the clamp.
2. The tooling for processing the conductive tube of a multi-conductor rod three-post insulator according to claim 1, characterized in that, The support arm includes a support rod, on which a sliding sleeve is provided for rotating with the center hole of the multi-conducting rod three-post insulator. The end of the sliding sleeve near the mounting plate is provided with a protrusion along the radial direction of the support rod to limit the position of the multi-conducting rod three-post insulator.
3. The tooling for processing the conductive tube of a three-post insulator with multiple conductive rods according to claim 2, characterized in that, The sliding sleeve is a nylon sliding sleeve.
4. The tooling for processing the conductive tube of a three-post insulator with multiple conductive rods according to claim 2 or 3, characterized in that, A claw device is installed on the outer wall of the end of the sliding sleeve away from the mounting plate by opening a mounting groove. A rotating shaft with a different plane perpendicular to the support rod is provided in the mounting groove. The claw device includes a clamping plate. The clamping plate has a through hole corresponding to the rotating shaft to realize the clamping plate swinging radially along the support rod. A protrusion is provided on the side of the clamping plate facing away from the support rod. This protrusion and the sliding sleeve together realize the axial limitation of the multi-conducting rod three-post insulator. A tension spring is provided for the clamping plate.
5. The tooling for processing the conductive tube of a three-post insulator with multiple conductive rods according to claim 2 or 3, characterized in that, An anti-detachment block is fixedly installed at the end of the support rod away from the mounting plate. The anti-detachment block cooperates with the sliding sleeve to stop the movement. The outer contour dimension of the anti-detachment block is smaller than the diameter of the central hole of the three-post insulator of the multi-conducting rod.
6. The tooling for processing the conductive tube of a three-post insulator with multiple conductive rods according to claim 2 or 3, characterized in that, A push-out spring is fitted onto the support rod. The push-out spring is located between the sliding sleeve and the mounting plate and is used to provide a push-out force to the sliding sleeve so that the conductive tube can be dislodged from the clamp when changing the processing position.
7. The tooling for processing the conductive tube of a multi-conducting rod three-post insulator according to any one of claims 1-3, characterized in that, The mounting plate is provided with mounting holes for mounting support rods. The end of the support rod is provided with a mounting section that is inserted into the mounting hole. There is a stepped surface between the mounting section and other parts of the support rod that is stopped by the corresponding side of the mounting plate. A fixing end cap that is stopped by the other side of the mounting plate is fixedly connected to the end of the mounting section.
8. The tooling for processing the conductive tube of a multi-conducting rod three-post insulator according to any one of claims 1-3, characterized in that, The mounting plate has a counterweight at the end furthest from the support arm for adjusting the center of gravity so that it coincides with the center of rotation.
9. The machining fixture for the conductive tube of a three-post insulator with multiple conductive rods according to claim 8, characterized in that, The counterweight is fixedly mounted on the mounting plate using hexagon socket bolts.
10. The tooling for processing the conductive tube of a multi-conducting rod three-post insulator according to any one of claims 1-3, characterized in that, The clip head is connected to the mounting plate via a flange.