A floating trimming device for the burrs of composite insulator skirts

Abstract

This invention discloses a floating trimming device for trimming the burrs of composite insulator skirts, comprising a frame, a clamping drive mechanism, a feeding mechanism, and a trimming execution mechanism. The clamping drive mechanism clamps the insulator and drives it to rotate, while the feeding mechanism drives the trimming execution mechanism to move along the insulator's axial direction. The trimming execution mechanism includes a column, an upper pressure arm, a lower pressure arm, an upper roller cutter, a lower roller cutter, and an elastic element. The upper and lower pressure arms are positioned at different heights on the column and both extend towards the skirt. The upper and lower roller cutters are rotatably mounted at the ends of their respective pressure arms and are radially opposite to each other. The elastic element elastically clamps the two roller cutters to the outer edge of the skirt. This invention achieves adaptive trimming through floating tracking, avoiding damage to the skirt and improving trimming quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of insulator manufacturing technology, specifically to a floating trimming device for the trimming of sheds on composite insulators. Background Technology

[0002] Insulators, as a crucial component of power transmission and transformation equipment, typically have skirts made by injection molding or compression molding, where silicone rubber is coated onto the core rod. During the molding process, due to the parting line of the mold, continuous thin, flaky flash inevitably forms around the outer edge of the skirt. To remove this flash, current production methods usually involve coating the skirt surface with an insulating layer using a coating machine, followed by manual scraping, or directly having operators manually remove it along the skirt edge with a knife. However, this manual trimming method is not only inefficient, but also makes it difficult for operators to precisely control the cutting angle and depth of the knife, easily scratching the skirt surface, damaging the integrity of the silicone rubber sheath, and even causing electric field distortion in the insulator due to excessively deep cuts, thus affecting the product's electrical performance.

[0003] While some semi-automatic trimming devices exist for rubber products, most are designed for simple rotating bodies of specific shapes and are difficult to apply directly to complex curved surfaces like insulator skirts, which have large diameters, thin edges, and a degree of flexibility. Insulator skirts inherently possess shape tolerances and radial runout after molding. When using rigid cutting tools for hard turning, the tools cannot adaptively track the surface undulations of the skirt, easily leading to localized missed cuts or over-cuts. Therefore, how to efficiently and stably remove flash from the outer edge of the skirt without damaging the skirt itself has long been a pressing technical problem in this field. To address this, this invention proposes a floating trimming device for flash on composite insulator skirts. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a floating trimming device for the trimming of shed edges on composite insulators.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A floating trimming device for trimming the burrs of composite insulator skirts includes a frame, a clamping drive mechanism, a feeding mechanism, and a trimming execution mechanism. The clamping drive mechanism is located at one end of the frame and is used to clamp one end of the insulator and drive the insulator to rotate around its own axis. The feeding mechanism is located on the frame along the axial direction of the insulator and is used to drive the trimming execution mechanism to move along the axial direction of the insulator. The trimming execution mechanism includes a column, an upper pressure arm, a lower pressure arm, an upper cutter, a lower cutter, and an elastic element. The column is located on the feeding mechanism, and one end of the upper pressure arm... The upper and lower pressure arms are respectively positioned at different heights on the column, with both extending towards the insulator's shed. The upper roller is rotatably mounted on the end of the upper pressure arm away from the column, and the lower roller is rotatably mounted on the end of the lower pressure arm away from the column. The upper and lower rollers are arranged opposite each other in the radial direction of the insulator, respectively pressing against the upper and lower parts of the outer edge of the shed. An elastic element is connected between the upper and lower pressure arms to provide elastic force, causing the upper and lower rollers to move towards each other in the radial direction of the insulator, thereby elastically clamping them to the outer edge of the shed.

[0007] Preferably, the axes of the upper and lower rollers are both parallel to the axis of the insulator.

[0008] Preferably, both the upper and lower rollers are stepped combined rotary bodies. The ends of the upper and lower pressure arms away from the column are fixedly equipped with U-shaped mounting brackets. The stepped combined rotary bodies are rotatably mounted in the opening of the U-shaped mounting brackets via a rotating shaft coaxially arranged with them.

[0009] Preferably, the stepped composite rotating body has a cylindrical reference portion for abutting against the center of the outer circumferential surface of the umbrella skirt, and an annular cutting edge portion for engaging with the outer edge line of the umbrella skirt, wherein the axial position of the annular cutting edge portion is offset from the axial position of the cylindrical reference portion.

[0010] Preferably, the annular cutting edge of the stepped combined rotary body on the upper pressure arm is located on the right side of its cylindrical reference portion, and the annular cutting edge of the stepped combined rotary body on the lower pressure arm is located on the left side of its cylindrical reference portion.

[0011] Preferably, the trimming actuator further includes a screw, an upper adjusting member, and a lower adjusting member. A stand is provided on the feeding mechanism. The column is fixedly installed inside the stand on the side close to the feeding mechanism, and the screw is fixedly installed inside the stand on the side away from the feeding mechanism. The upper pressure arm and the lower pressure arm are both installed inside the stand. The column and the screw pass through the upper pressure arm and the lower pressure arm, and the column and the screw are slidably connected to the upper pressure arm and the lower pressure arm.

[0012] Preferably, the upper adjusting member is disposed on the screw and located on the descending path of the upper pressure arm, and is used to limit the downward movement range of the upper pressure arm; the lower adjusting member is disposed on the screw and located on the ascending path of the lower pressure arm, and is used to limit the upward movement range of the lower pressure arm.

[0013] Preferably, both the upper and lower adjusting components are adjusting nuts, and the adjusting nuts are threaded onto the screw rod.

[0014] Preferably, the elastic element is a tension spring, and fixing rings are provided at the bottom of the upper pressure arm and the top of the lower pressure arm respectively, with the two ends of the tension spring hooked onto the two fixing rings respectively.

[0015] Preferably, the clamping drive mechanism includes a rotating spindle and a chuck, the chuck being disposed at the end of the rotating spindle for uniformly clamping the fittings at the end of the insulator in the circumferential direction; the feeding mechanism includes a linear guide rail laid on the frame along the axis of the insulator and a sliding platform slidably disposed on the linear guide rail, the upright being fixedly disposed on the sliding platform.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention drives the insulator to rotate around its own axis through a clamping and driving mechanism, and in conjunction with the feeding mechanism, drives the trimming execution mechanism to move along the axial direction of the insulator. This achieves automatic and continuous trimming of the outer edge of the shed skirt, eliminating the traditional manual operation mode of manually scraping each edge with a hand-held tool. This improves trimming efficiency, reduces the labor intensity of operators, and ensures a continuous and stable trimming process. It avoids fluctuations in trimming quality caused by human fatigue or differences in technique, thereby improving the cycle time and production capacity of mass production.

[0018] 2. This invention utilizes an elastic element between the upper and lower pressure arms to provide elastic force, causing the upper and lower hobs to move towards each other radially, forming an elastic floating clamping on the outer edge of the umbrella skirt. Therefore, when the umbrella skirt experiences surface undulations due to forming tolerances or radial runout, the two hobs can automatically extend and retract radially under the action of the elastic element, tracking the contour changes of the outer edge of the umbrella skirt in real time. This achieves passive adaptive compensation for the complex curved surface and shape tolerances of the umbrella skirt, avoiding overcutting damage caused by rigid hard turning and preventing local missed cuts due to the tool's inability to follow, thus ensuring the uniformity and consistency of flash removal.

[0019] 3. In this invention, the upper and lower roller cutters simultaneously press against the outer edge of the umbrella skirt from both the upper and lower sides, evenly distributing the cutting force to the upper and lower surfaces of the umbrella skirt edge. Furthermore, the roller cutters and the umbrella skirt are in rolling contact, resulting in a gentle cutting action. This avoids scratches or tears to the silicone rubber sheath caused by unilateral force or uncontrolled cutter angle. Simultaneously, under the elastic clamping force, the upper and lower roller cutters only adhere to the flash area of ​​the outer edge of the umbrella skirt, without involving extrusion or cutting of the main body of the umbrella skirt. This effectively protects the complete contour and surface quality of the umbrella skirt body, preventing damage to the silicone rubber sheath and electric field distortion caused by excessively deep local cuts, thus fully ensuring the electrical performance and long-term operational reliability of the insulator. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0023] Figure 3 This is a schematic diagram of the trimming actuator structure of the present invention;

[0024] Figure 4 This is a schematic diagram showing the position of the annular cutting edge at the upper and lower pressure arms of the present invention.

[0025] Figure 5 This is a schematic diagram of the U-shaped mounting bracket structure of the present invention;

[0026] Figure 6 This is a schematic diagram showing the positions of the upper adjusting member, the lower adjusting member, and the fixing ring of the present invention.

[0027] Drawing number explanation: 1. Frame; 2. Clamping drive mechanism; 3. Feed mechanism; 4. Trimming execution mechanism; 5. Column; 6. Upper pressure arm; 7. Lower pressure arm; 8. Upper hob; 9. Lower hob; 10. Elastic element; 11. U-shaped mounting bracket; 12. Rotary shaft; 13. Cylindrical reference part; 14. Annular cutting edge part; 15. Screw; 16. Upper adjusting part; 17. Lower adjusting part; 18. Stand; 19. Fixing ring; 20. Rotary spindle; 21. Chuck; 22. Linear guide rail; 23. Sliding platform. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] Please refer to Figures 1 to 6In one embodiment, a floating trimming device for trimming the fringe of a composite insulator skirt includes a frame 1, a clamping drive mechanism 2, a feeding mechanism 3, and a trimming execution mechanism 4. The clamping drive mechanism 2 is located at one end of the frame 1 and is used to clamp one end of the insulator and drive the insulator to rotate around its own axis. The feeding mechanism 3 is located on the frame 1 along the axial direction of the insulator and is used to drive the trimming execution mechanism 4 to move axially along the insulator. The trimming execution mechanism 4 includes a column 5, an upper pressure arm 6, a lower pressure arm 7, an upper roller cutter 8, a lower roller cutter 9, and an elastic element 10. The column 5 is located on the feeding mechanism 3. One end of the upper pressure arm 6 and one end of the lower pressure arm 7 are respectively located at different heights on the column 5, and both the upper pressure arm 6 and the lower pressure arm 7 extend towards the fringe of the insulator. In this design, the clamping drive mechanism 2 drives the insulator to rotate at a uniform speed, while the feeding mechanism 3 drives the trimming execution mechanism 4 to move stepwise along the insulator's axial direction. This allows the upper roller cutter 8 and the lower roller cutter 9 to sequentially traverse the outer edge of each shed, achieving continuous and automatic trimming of all shed edges of the entire insulator. This significantly improves trimming efficiency and ensures the stability of trimming quality. It should be noted that the clamping drive mechanism 2 can use a servo motor and reducer to drive the rotating spindle 20, precisely controlling the insulator's rotation speed. This ensures that the relative linear velocity between the roller cutter and the outer edge of the shed is within a suitable trimming range, preventing the flash from melting and sticking due to excessive speed or incomplete trimming due to insufficient speed.

[0030] In the trimming actuator 4, the upper roller 8 is rotatably mounted on the end of the upper pressure arm 6 away from the column 5, and the lower roller 9 is rotatably mounted on the end of the lower pressure arm 7 away from the column 5. The upper roller 8 and the lower roller 9 are arranged opposite each other in the radial direction of the insulator and are used to press against the upper and lower parts of the outer edge of the shed, respectively. The elastic element 10 is connected between the upper pressure arm 6 and the lower pressure arm 7 to provide elastic force, so that the upper roller 8 and the lower roller 9 move closer to each other in the radial direction of the insulator, thereby elastically clamping the outer edge of the shed. In this design, when the insulator skirt exhibits radial runout or shape tolerance due to the molding process, the outer edge of the skirt will push the upper roller 8 and / or lower roller 9 to overcome the elastic force of the elastic element 10 during rotation, resulting in radial displacement. Since the elastic force of the elastic element 10 is always present, the two rollers can adaptively follow the contour undulations of the skirt's outer edge in real time, maintaining an elastic clamping state on the skirt's outer edge. This ensures that the cutting surface of the rollers always adheres to the root of the flash, preventing scratches on the skirt surface due to rigid resistance and avoiding missed flash due to excessive gaps. It should be noted that the elastic element 10 can be in various forms, such as a tension spring, compression spring, or gas spring. The selection of its elastic force should be matched according to the thickness and strength of the silicone rubber flash to ensure that the rollers have sufficient clamping force to cut the flash while preventing irreversible deformation of the skirt edge due to excessive clamping force.

[0031] The axes of the upper roller 8 and the lower roller 9 are both parallel to the axis of the insulator. In this design, the axes of the two rollers are kept parallel to the axis of the insulator, making the rotation plane of the rollers perpendicular to the radial direction of the shed. When the rollers rotate passively with the shed, a pure rolling contact is formed between the outer circle of the roller and the outer edge of the shed, avoiding scratch damage to the shed surface caused by sliding friction. At the same time, the cutting edge of the roller can uniformly cut off the burrs along the entire circumference of the outer edge of the shed. It should be noted that the parallelism of the roller axes should be corrected using special tooling during assembly to ensure that the parallelism error between the axes of the upper roller 8 and the lower roller 9 and the axis of the insulator main shaft is controlled within the allowable range, thereby ensuring that the outer circumference of the shed after trimming is neat and consistent.

[0032] Both the upper hob 8 and the lower hob 9 are stepped combined rotary bodies. A U-shaped mounting bracket 11 is fixedly installed at the end of the upper pressure arm 6 and the lower pressure arm 7 away from the column 5. The stepped combined rotary body is rotatably mounted within the opening of the U-shaped mounting bracket 11 via a rotating shaft 12 coaxially arranged with it. In this design, the stepped combined rotary body adopts an integral stepped shaft structure or a split combined structure. It is mounted between the two side walls of the U-shaped mounting bracket 11 via the rotating shaft 12. The two ends of the rotating shaft 12 can be rotatably engaged with the U-shaped mounting bracket 11 through bearings, allowing the stepped combined rotary body to rotate flexibly under the frictional force of the outer edge of the skirt, thereby transforming the cutting process into rolling shearing and reducing cutting resistance and heat accumulation.

[0033] The stepped composite rotary body has a cylindrical reference portion 13 for abutting against the center of the outer circumferential surface of the skirt, and an annular cutting edge portion 14 for engaging with the outer edge edge of the skirt. The axial position of the annular cutting edge portion 14 is offset from the axial position of the cylindrical reference portion 13. When the hob is elastically clamped at the outer edge of the skirt, the cylindrical reference portion 13 forms a rolling contact with the center area of ​​the outer circumferential surface of the skirt, serving a positioning and guiding function, while the annular cutting edge portion 14 corresponds precisely to the upper and lower edge edges of the outer edge of the skirt, shearing and separating the flash from the skirt body. It should be noted that the surface of the cylindrical reference portion 13 should be precision ground to ensure uniform contact with the outer circumferential surface of the skirt and avoid damaging the skirt surface due to localized stress concentration.

[0034] The annular cutting edge 14 of the stepped combined rotating body on the upper pressure arm 6 is located to the right of its cylindrical reference portion 13, and the annular cutting edge 14 of the stepped combined rotating body on the lower pressure arm 7 is located to the left of its cylindrical reference portion 13. In this design, the annular cutting edge 14 of the upper hob 8 is offset to the right relative to its cylindrical reference portion 13, and the annular cutting edge 14 of the lower hob 9 is offset to the left relative to its cylindrical reference portion 13. When the upper hob 8 and the lower hob 9 simultaneously clamp the outer edge of the umbrella skirt from the upper and lower sides, the annular cutting edge 14 of the upper hob 8 and the annular cutting edge 14 of the lower hob 9 act on the upper edge line and the lower edge line of the outer edge of the umbrella skirt, respectively. The shearing action surfaces of the two are offset from each other in the axial direction, so that the flash is subjected to shearing forces in opposite directions on the upper and lower sides, thereby forming a tearing cut at the edge line of the outer edge of the umbrella skirt, effectively avoiding the possible delamination or crushing of the umbrella skirt edge when the upper and lower cutting edges are squeezed at the same axial position. It should be noted that the offset of the annular cutting edge 14 should be optimized according to the actual thickness of the skirt edge and the width of the flash. If the offset is too large, the cutting edge may be separated from the flash area. If the offset is too small, the upper and lower shearing surfaces will overlap, both of which will affect the trimming effect.

[0035] The trimming actuator 4 also includes a screw 15, an upper adjusting member 16, and a lower adjusting member 17. The feed mechanism 3 is provided with a stand 18. The column 5 is fixedly installed inside the stand 18 on the side close to the feed mechanism 3, and the screw 15 is fixedly installed inside the stand 18 on the side away from the feed mechanism 3. The upper pressure arm 6 and the lower pressure arm 7 are both installed inside the stand 18. The column 5 and the screw 15 both pass through the upper pressure arm 6 and the lower pressure arm 7, and the column 5 and the screw 15 are slidably connected to the upper pressure arm 6 and the lower pressure arm 7. In this design, the column 5 and the screw 15 together form the guide support structure for the upper pressure arm 6 and the lower pressure arm 7. The column 5 acts as the main guide column, bearing the bending moment load of the cantilevered portions of the upper pressure arm 6 and the lower pressure arm 7. The screw 15 acts as an auxiliary guide and provides the mounting base for the upper and lower adjusting components 17. The upper pressure arm 6 and the lower pressure arm 7 can slide freely along the axial direction of the column 5 and the screw 15, thus achieving radial floating under the action of the elastic element 10. It should be noted that the axes of the column 5 and the screw 15 are parallel to the radial direction of the insulator to ensure that the floating direction of the upper pressure arm 6 and the lower pressure arm 7 accurately points to the axis of the insulator, so that the clamping force of the cutter always acts radially along the skirt.

[0036] The upper adjusting member 16 is mounted on the screw 15 and located on the descending path of the upper pressure arm 6, used to limit the downward movement of the upper pressure arm 6; the lower adjusting member 17 is mounted on the screw 15 and located on the ascending path of the lower pressure arm 7, used to limit the upward movement of the lower pressure arm 7. In this scheme, the upper adjusting member 16 acts as a limiting stop for the downward floating of the upper pressure arm 6, and the lower adjusting member 17 acts as a limiting stop for the upward floating of the lower pressure arm 7. By adjusting the axial positions of the upper adjusting member 16 and the lower adjusting member 17 on the screw 15 respectively, the minimum distance between the upper pressure arm 6 and the lower pressure arm 7 can be limited, that is, the minimum clamping gap between the upper roller 8 and the lower roller 9 can be limited, thereby adapting to the edge of the umbrella skirt with different thicknesses and avoiding excessive pressing or even cracking of the umbrella skirt edge by the two rollers due to excessive restoring force of the elastic member 10. It should be noted that the adjustment of the upper adjusting member 16 and the lower adjusting member 17 should be set once during the initial installation of the device according to the actual thickness of the umbrella skirt of the insulator to be trimmed, and there is no need to adjust repeatedly during continuous operation.

[0037] Both the upper adjusting component 16 and the lower adjusting component 17 are adjusting nuts, which are threaded onto the screw rod 15. In this design, the adjusting nut is used as a limiting component, resulting in a simple and reliable structure. The operator only needs to rotate the adjusting nut to change its position on the screw rod 15, thereby conveniently and quickly adjusting the floating range of the upper pressure arm 6 and the lower pressure arm 7. It should be noted that the adjusting nut can use a fine thread to improve the adjustment accuracy. Furthermore, after the adjusting nut is tightened to the predetermined position, it can be further secured with a lock nut or thread sealant to prevent the adjusting nut from loosening or shifting due to vibration during device operation.

[0038] The elastic element 10 is a tension spring. Fixing rings 19 are correspondingly provided at the bottom of the upper pressure arm 6 and the top of the lower pressure arm 7. Both ends of the tension spring are hooked onto the two fixing rings 19. In this design, one end of the tension spring is hooked onto the fixing ring 19 at the bottom of the upper pressure arm 6, and the other end is hooked onto the fixing ring 19 at the top of the lower pressure arm 7. The tension spring is located in the area between the upper pressure arm 6 and the lower pressure arm 7. When the upper pressure arm 6 and the lower pressure arm 7 move away from each other under the push of the umbrella skirt, the tension spring is further stretched. Its elastic restoring force always pulls the upper pressure arm 6 and the lower pressure arm 7 towards the middle, thereby achieving elastic clamping. It should be noted that the tension spring can be selected with different wire diameters and coil numbers according to the required clamping force. Furthermore, multiple tension springs can be arranged radially at intervals along the column 5 inside the frame 18 to provide a more uniform and stable distribution of elastic force, ensuring that the upper pressure arm 6 and the lower pressure arm 7 are subjected to balanced force throughout the trimming process.

[0039] The clamping drive mechanism 2 includes a rotating spindle 20 and a chuck 21. The chuck 21 is located at the end of the rotating spindle 20 and is used to uniformly clamp the fittings at the end of the insulator along the circumferential direction. The feeding mechanism 3 includes a linear guide rail 22 laid on the frame 1 along the axis of the insulator and a sliding platform 23 slidably mounted on the linear guide rail 22. The upright frame 18 is fixedly mounted on the sliding platform 23. In this design, the chuck 21 adopts a three-jaw clamping structure. When the rotating spindle 20 drives the chuck 21 to rotate, the jaws of the chuck 21 contract radially under the action of centrifugal force or axial thrust, thereby firmly clamping the fittings at the end of the insulator and ensuring the coaxiality of the insulator and the rotating spindle 20. The sliding platform 23 is driven by a lead screw and nut pair or a synchronous belt on the linear guide rail 22 (not shown in the figure, but can be selected by the user as needed), which can precisely control the feed speed and feed amount of the trimming actuator 4 along the axis of the insulator. It should be noted that the linear guide 22 can be a precision ball linear guide to ensure the straightness and repeatability of the sliding platform 23. At the same time, limit switches and buffers can be set at both ends of the linear guide 22 to prevent the sliding platform 23 from exceeding the stroke range.

[0040] In another preferred embodiment, this embodiment further explains the above embodiment, the difference being that the adjustment and calibration process of the floating trimming device is optimized, especially the rapid setting method for different umbrella skirt thickness specifications. In this embodiment, when changing insulators of different specifications, the operator first rotates the upper and lower adjusting nuts so that the initial distance between the upper pressure arm 6 and the lower pressure arm 7 is slightly larger than the thickness of the umbrella skirt to be trimmed. Then, one end of the insulator is inserted into the chuck 21 and rotation is started. Subsequently, the sliding platform 23 is driven to move the trimming actuator 4 to the first umbrella skirt position. At this time, the upper adjusting member 16 and the lower adjusting member 17 are gradually rotated using an external wrench, so that the upper roller cutter 8 and the lower roller cutter 9 gradually move closer to the outer edge of the umbrella skirt until the tension spring is stretched to the preset elongation. This elongation corresponds to the required elastic clamping force, so that the roller cutter can effectively remove the burrs without damaging the umbrella skirt body. In this solution, after the initial adjustment, the operator can mark the position of the adjusting nut corresponding to the insulator specification on the screw 15. When trimming the same specification product again, the adjusting nut can be directly screwed to the marked position, eliminating the need for repeated trial cutting and calibration, thus significantly improving batch switching efficiency. It should be noted that during the adjustment process, temporary feeler gauges can be placed between the upper pressure arm 6 and the top surface of the support frame 18, and between the lower pressure arm 7 and the bottom surface of the support frame 18, to accurately measure the floating allowance of the pressure arms. This ensures that the floating stroke of the upper roller cutter 8 and the lower roller cutter 9 is uniform, preventing inconsistent floating ranges of the upper and lower pressure arms 7 due to unilateral tightening of the adjusting nut, thereby ensuring symmetrical and consistent removal of burrs from the upper and lower edges of the umbrella skirt after trimming.

[0041] In this embodiment, the clamping drive mechanism 2 drives the insulator to rotate via a servo motor and reducer. The rotational speed is set within a low range, resulting in a low relative linear velocity between the upper and lower roller cutters 8 and the outer edge of the umbrella skirt. The contact between them is primarily rolling, generating very limited frictional heat, which will not cause the surface temperature of the silicone rubber umbrella skirt to rise to its softening point. In this solution, because the trimming process itself involves a small cutting amount and the rollers roll smoothly, the temperature rise of the rollers and the edge of the umbrella skirt during actual operation is negligible. Therefore, no additional cooling device is needed, simplifying the equipment structure and reducing manufacturing costs and maintenance complexity. It should be noted that operators can adjust the servo motor speed to keep the roller linear velocity within a safe range, depending on the insulator material and the thickness of the flash. Even with long-term continuous operation, no heat accumulation problem will occur, ensuring the stability of the trimming process and the surface quality of the umbrella skirt.

Claims

1. A floating trimming device for trimming the burrs of composite insulator skirts, comprising a frame (1), a clamping drive mechanism (2), a feeding mechanism (3), and a trimming execution mechanism (4), characterized in that: The clamping drive mechanism (2) is located at one end of the frame (1) and is used to clamp one end of the insulator and drive the insulator to rotate around its own axis. The feeding mechanism (3) is mounted on the frame (1) along the axial direction of the insulator and is used to drive the trimming execution mechanism (4) to move along the axial direction of the insulator; The trimming actuator (4) includes a column (5), an upper pressure arm (6), a lower pressure arm (7), an upper roller (8), a lower roller (9), and an elastic element (10). The column (5) is mounted on the feeding mechanism (3). One end of the upper pressure arm (6) and one end of the lower pressure arm (7) are respectively mounted at different heights on the column (5). Both the upper pressure arm (6) and the lower pressure arm (7) extend towards the insulator's skirt. The upper roller (8) is rotatably mounted on the end of the upper pressure arm (6) away from the column (5), and the lower roller (9) is rotatably mounted on the end of the lower pressure arm (7) away from the column (5). The upper roller (8) and the lower roller (9) are arranged opposite to each other in the radial direction of the insulator and are used to press against the upper and lower parts of the outer edge of the shed, respectively. The elastic element (10) is connected between the upper pressure arm (6) and the lower pressure arm (7) to provide elastic force, so that the upper roller (8) and the lower roller (9) move toward each other along the radial direction of the insulator, thereby elastically clamping the outer edge of the skirt.

2. The floating trim device for composite insulator shed flash according to claim 1, wherein, The axis of the upper roller (8) and the axis of the lower roller (9) are both parallel to the axis of the insulator.

3. The floating trim device for composite insulator shed flash according to claim 1, wherein, Both the upper roller (8) and the lower roller (9) are stepped combined rotary bodies. The upper pressure arm (6) and the lower pressure arm (7) are both fixedly provided with a U-shaped mounting bracket (11) at the end away from the column (5). The stepped combined rotary body is rotatably mounted in the opening of the U-shaped mounting bracket (11) through a rotating shaft (12) coaxially arranged with it.

4. The floating trimming device for the trimming of composite insulator skirts according to claim 3, characterized in that, The stepped composite rotating body has a cylindrical reference portion (13) for abutting against the center of the outer circumferential surface of the umbrella skirt, and an annular cutting edge portion (14) for engaging with the outer edge line of the umbrella skirt. The axial position of the annular cutting edge portion (14) is offset from the axial position of the cylindrical reference portion (13).

5. The floating trim device for composite insulator shed flash according to claim 4, wherein, The annular cutting edge (14) of the stepped combined rotary body provided on the upper pressure arm (6) is located on the right side of its cylindrical reference part (13), and the annular cutting edge (14) of the stepped combined rotary body provided on the lower pressure arm (7) is located on the left side of its cylindrical reference part (13).

6. The floating trim device for composite insulator shed flash according to claim 1, wherein, The trimming execution mechanism (4) also includes a screw (15), an upper adjusting member (16) and a lower adjusting member (17). The feeding mechanism (3) is provided with a stand (18). The column (5) is fixedly installed inside the stand (18) on the side close to the feeding mechanism (3). The screw (15) is fixedly installed inside the stand (18) on the side away from the feeding mechanism (3). The upper pressure arm (6) and the lower pressure arm (7) are both installed inside the stand (18). The column (5) and the screw (15) both pass through the upper pressure arm (6) and the lower pressure arm (7). The column (5) and the screw (15) are both slidably connected to the upper pressure arm (6) and the lower pressure arm (7).

7. The floating trim device for composite insulator shed flash according to claim 6, wherein, The upper adjustment member (16) is disposed on the screw (15) and located on the descending path of the upper pressure arm (6), and is used to limit the downward movement of the upper pressure arm (6); the lower adjustment member (17) is disposed on the screw (15) and located on the ascending path of the lower pressure arm (7), and is used to limit the upward movement of the lower pressure arm (7).

8. The floating trim device for composite insulator shed flash according to claim 6, wherein, Both the upper adjusting member (16) and the lower adjusting member (17) are adjusting nuts, and the adjusting nuts are threadedly connected to the screw (15).

9. The floating trim device for composite insulator shed flash according to claim 6, wherein, The elastic element (10) is a tension spring. The bottom of the upper pressure arm (6) and the top of the lower pressure arm (7) are respectively provided with fixing rings (19). The two ends of the tension spring are hooked onto the two fixing rings (19).

10. The floating trim device for composite insulator shed flash according to claim 6, wherein, The clamping drive mechanism (2) includes a rotating spindle (20) and a chuck (21). The chuck (21) is located at the end of the rotating spindle (20) and is used to uniformly clamp the fittings at the end of the insulator in the circumferential direction. The feeding mechanism (3) includes a linear guide rail (22) laid on the frame (1) along the axis of the insulator and a sliding platform (23) slidably disposed on the linear guide rail (22). The upright frame (18) is fixedly disposed on the sliding platform (23).

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