Machining device for cutting main insulating layer of cable joint

Abstract

The utility model provides a processing device for cutting a main insulating layer of a cable joint. The processing device comprises a clamping mechanism and a feeding mechanism, the clamping mechanism comprises a clamping moving unit and two clamping jaws, and the two clamping jaws are movably arranged on the clamping moving unit; the feeding mechanism is arranged on one side of the clamping mechanism and comprises a rotating unit, a feeding moving unit and a cutting tool, the cutting tool is assembled at the output end of the rotating unit, and the rotating unit is movably arranged on the feeding moving unit. According to the utility model, the manufacturing efficiency can be greatly improved, the fault repair time can be reduced, the development productivity can be liberated, the fault rate of the cable joint in the cable operation can be reduced, the unnecessary economic loss can be reduced, and the rapid development of the power industry can be promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of cable construction, in particular to a processing device for cutting a main insulating layer of a cable joint. Background Art

[0002] With the rapid growth of the cable industry and the continuous expansion of the scale of power system construction, the proportion of power cable lines is increasing due to the advantages of low failure rate and beautification of the environment. The application of high-voltage cables is becoming more and more extensive. In order to connect the power cables during their laying process, cable joints need to be made. Compared with the high-voltage cable body, the cable joints (terminal heads and intermediate joints) are the most important and critical parts of the entire cable line during the entire service life of the high-voltage cable. They are also the weakest and most prone to failure. According to statistics, in cable lines, more than 90.2% of non-external faults are caused by cable joints, and the cable joints are in a special position. The production of cable joints with excellent quality is a major guarantee for the safe operation of cable lines. Therefore, the production method of high-voltage cable joints has received more and more attention.

[0003] Cutting and stripping the main insulation layer of the cable is a key step in making cable joints. In the past, technicians mostly used tools such as electric saws and electrician's knives to strip the main insulation layer of the cable. It took two people 90 minutes to strip a set of main insulation layers, which was not efficient. After stripping, the main insulation layer had to be polished with sandpaper. If the cut surface of the main insulation layer was not smooth enough, it would easily cause tip discharge and other phenomena, affecting the safe operation of the cable. It can be said that the quality of cable joint production is directly related to the quality of the stripping of the main insulation layer. The quality of the cutting and stripping process of the main insulation layer of the cable is very important. The cutting process of the main insulation layer of the cable joint has become an important issue restricting the development of the electrical and electrical industry.

[0004] The production of high-voltage cable joints mainly includes cable cutting, straightening of bent cables, cutting and stripping of the main insulation layer of cables, etc. At present, the main cable joint processing method is manual cutting. As the main cable joint processing method, it needs to be made with tools such as electrician's knives and saw bows. This method is widely applicable and low in cost, but has poor applicability, low process level and low efficiency, which seriously restricts the safe and reliable operation of cables and the rapid development of power grids.

[0005] During the processing of cable joints, the ends of the cables may be unqualified due to faults, so it is often necessary to cut off the unqualified ends. At present, the main cable cutting methods are manual cutting and cable cutting devices. However, due to factors such as the working environment, the popularity of cable cutting devices is relatively low, and manual cutting is mainly used. However, in the process of manual cutting of the cable ends, since the cables have certain flexibility and great rigidity, fixing the cables becomes a problem. At the same time, problems such as tight time, high intensity, slipping and injuries, accidental cable disconnection, arc or step voltage injuries have brought great inconvenience and safety hazards to the majority of power supply personnel.

[0006] In the actual production process of cable joints, straightening measures are required for cables that are bent and affect their use and quality. Traditional technology usually adopts manual straightening methods, where pliers or wrenches are used to straighten them manually, but the workload is large and the straightening efficiency is low. The equipment used to straighten cables in the prior art generally drives the movement of the cable line through conveyor traction, and the cable line is straightened by the pressing force of the rollers of the straightening device. Although the purpose of improving the straightening quality can be achieved, it is large in size, occupies a large space, has poor flexibility in use, is not convenient to carry for on-site construction, and has a low actual utilization rate.

[0007] At present, in the construction process of high-voltage cable joints, the high-voltage cable insulation layer cutting process is a key process that is time-consuming, labor-intensive and has very high process requirements. It is highly dependent on manual labor. Whether it is measuring the outer diameter and length of the cable, or cutting the outer semi-conductive layer and polishing the outer surface of the high-voltage cable, it needs to be completed by high-voltage cable technicians who have been trained for many years. It is not only time-consuming and labor-intensive, but also has the defects of easily damaging the conductor and low peeling efficiency. Sometimes it even causes poor construction and failure of the high-voltage cable joint. The prior art already has a simple ring cutting device, which includes at least an annular shell and a knife body circumferentially distributed in the annular shell. The cutting depth of the cable outer skin is adjusted by adjusting the posture of the knife body, which effectively avoids the use of traditional electrician's knives when stripping the high-voltage cable insulation layer. The occurrence of injuries to personnel due to misoperation. At the same time, the operation time of making high-voltage cable joints is greatly reduced.

[0008] After further investigation, it was found that at present, a large number of high-voltage cable joints are still made by workers manually using tools such as electrician knives and saw bows. However, manually made high-voltage cable joints have poor applicability: low voltage, small wire diameter, thin insulation, easy to handle, and difficult to cut high-voltage cables; low process level: poor precision, easy to expose the wire core for too long, reducing the insulation to the ground, tip discharge, and even joint explosion; low efficiency: cumbersome steps, time-consuming cutting and grinding, easy to be scratched by electrician knives, and easy to damage the wire.

[0009] In order to solve the problems of poor applicability, low process level and low efficiency of manual cutting of high-voltage cable connectors, a variety of cable connector main insulation layer cutting and processing devices have appeared in the domestic and foreign markets, mainly including the following mature products:

[0010] 1. Cable main insulation cutting pliers

[0011] The cable main insulation layer cutting device comprises a left clamp body and a right clamp body. The middle positions of the left clamp body and the right clamp body are cross-hinged by a connecting pin. The tail ends of the left clamp body and the right clamp body are connected with clamp handles. The front end of the right clamp body is provided with a first cable positioning groove with a notch facing inward, and the front end of the left clamp body is provided with a transverse blade corresponding to the first cable positioning groove. The tail end of the right clamp body or the left clamp body is provided with a second cable positioning groove with a notch facing inward, and the tail end of the right clamp body or the left clamp body is provided with a longitudinal blade corresponding to the second cable positioning groove. The device is made by the lever principle. When in use, the cross section of the cable main insulation layer is cut by the longitudinal blade and the second cable positioning groove, and then the longitudinal section of the cable main insulation layer is cut by the transverse blade and the first cable positioning groove, and finally the insulation layer is stripped. The structure is relatively simple and can perform simple cable main insulation layer cutting, but it cannot process chamfering, the processing accuracy is low, and the degree of electricization and automation is low. It mainly relies on manual cutting, which cannot meet the current requirements for processing chamfering and high automation of the cable joint main insulation layer cutting processing device.

[0012] 2. High voltage cable insulation stripping knife

[0013] The high-voltage cable insulation stripping knife is mainly composed of a universal ball, a knife body, a blade, a round knife head (pointed knife head), a top screw, a ruler, a shaft, an adjustment handle, etc. A round knife head can be used to strip a thicker insulation layer. A pointed knife head can be used to strip a thinner insulation layer. The stripping knife uses a blade made of alloy, and the knife head can be freely replaced according to the thickness of the high-voltage cable insulation layer, and one knife can be used for multiple purposes. Adjust the handle to adjust the top screw, observe the scale of the ruler, so that the blade just cuts through the insulation layer without damaging the wire, and ensures that the insulation layer is evenly stressed when the high-voltage cable insulation is peeled. The direction of the blade is adjustable to ensure that the direction of cutting the high-voltage cable insulation layer during construction is correct. The high-voltage cable insulation stripping knife has a simple manufacturing process and is easy to operate. It can effectively avoid the occurrence of injuries caused by misoperation when using traditional electrician knives to strip the high-voltage cable insulation layer. It is suitable for conventional operations of stripping the high-voltage cable insulation layer. However, the processed chamfer has high roughness, low processing accuracy, low degree of electricization and automation, and needs to rely on manual cutting, which cannot meet the current requirements for high processing accuracy and high degree of automation of the main insulation layer cutting processing equipment of the cable connector.

[0014] 3. High voltage cable terminal head manufacturing device

[0015] The manufacturing device of the high-voltage cable terminal head includes a first workbench, a first handle is provided on one side of the first workbench, a second workbench is provided on the other side of the first workbench, four legs are provided below the first workbench, a positioning seat is provided above the first workbench, two dumpling chains are provided above the first workbench and the second workbench, two telescopic buckles are provided below the first workbench and the second workbench, a first straightening seat is provided on one side of the second workbench, a second straightening seat is provided on the other side of the first straightening seat, a third straightening seat is provided on the other side of the second straightening seat, and a motor is provided in front of the second workbench. It can effectively straighten the cable to be processed; the tool moves, and the cable to be processed does not move, which effectively reduces the damage of the cable; it has good stability, is easy to disassemble and assemble, and is easy to carry. However, the device has poor applicability and low degree of automation. It needs to rely on manual assistance for cutting, and cannot meet the current requirements for convenient operation and low production cost of the main insulation layer cutting and processing device of the cable joint.

[0016] 4. Electric cable main insulation stripper

[0017] The electric cable main insulation layer stripper consists of a rotary cutting device, a connection limit cylinder and a transmission, a forward and reverse electric drill and other components. It is easy to operate, low in cost, and easy to carry. When in use, the staff only needs to manually strip the outer protective layer of the cable in advance to expose the three core cables, and then put the rotary cutting device of the main insulation layer stripper on the cable, and install the transmission and the rotary cutting device on the upper and lower ends of the connection limit cylinder respectively. After adjusting the corresponding cutting depth, connect the forward and reverse electric drill bit to the transmission to cut the main insulation layer of the cable. Afterwards, the staff reverses the electric drill, and the cutting device can automatically detach from the cable. The electric cable main insulation layer stripper is easy to operate, low in cost, easy to carry, and reaches the specified depth. The cut surface is smooth and flat, and the chamfer is formed in one time. However, the stripper has poor applicability and cannot cut damaged cables or straighten bent cables. It cannot meet the current requirements for wide applicability and high degree of automation of the main insulation layer cutting processing device of cable joints.

[0018] Therefore, in order to improve the manufacturing efficiency of high-voltage cable joints, it is urgent to design a processing device for cutting the main insulation layer of cable joints, so as to significantly improve the scope of application, cutting method, process accuracy, operation efficiency, intelligence, portability, process loss, etc., and lead to a new situation of simplified and portable cutting of the main insulation layer of cables. Utility Model Content

[0019] In order to solve the above problems, the utility model provides a processing device for cutting the main insulating layer of a cable joint to solve the problems raised by the background technology.

[0020] In order to achieve the above-mentioned purpose, the utility model provides a processing device for cutting the main insulation layer of a cable joint, and the technical solution adopted is as follows:

[0021] A processing device for cutting the main insulating layer of a cable joint, comprising a clamping mechanism and a feeding mechanism;

[0022] The clamping mechanism comprises a clamping movable unit and two clamping jaws, and the two clamping jaws are movably arranged on the clamping movable unit;

[0023] The feeding mechanism is arranged at one side of the clamping mechanism, and comprises a rotating unit, a feeding moving unit and a cutting tool, wherein the cutting tool is assembled at the output end of the rotating unit, and the rotating unit is movably arranged at the feeding moving unit.

[0024] Furthermore, it also includes a base, and the clamping mechanism and the feeding mechanism are both installed on the base.

[0025] Furthermore, the clamping moving unit includes a clamping moving slide rail, a clamping moving screw, a clamping moving motor, a motor mounting plate, a clamping moving screw bearing seat, and a clamping moving slider. The clamping moving slider is provided with two and both are movably mounted on the clamping moving slide rail. The clamping moving motor is mounted on the motor mounting plate. The clamping moving slider is coaxially connected to the clamping moving screw. One end of the clamping moving screw is connected to the output end of the clamping moving motor, and the other end is connected to the clamping moving screw bearing seat. Two clamping claws are respectively provided on the two clamping moving sliders.

[0026] Furthermore, the clamping jaws include a base plate, a vertical support plate and a plurality of clamping plates, the base plate is fixed on the clamping movable slider, the vertical support plate is connected to the base plate, the plurality of clamping plates are mounted on the vertical support plate, and the clamping plates are provided with clamping openings.

[0027] Furthermore, the feed moving unit includes a feed moving slide rail, a feed moving screw, a feed moving motor, a feed moving motor mounting plate, a feed moving screw bearing seat, and a feed moving slider. The feed moving slider is movably mounted on the feed moving slide rail, the feed moving motor is mounted on the feed moving motor mounting plate, the feed moving slider is coaxially connected to the feed moving screw, one end of the feed moving screw is connected to the output end of the feed moving motor, and the other end is connected to the feed moving screw bearing seat, and the rotating unit is arranged on the feed moving slider.

[0028] Furthermore, the rotating unit includes a rotating motor and a reducer, and an output end of the rotating motor is connected to an input end of the reducer.

[0029] Furthermore, the output end of the rotating motor is coaxially connected to a first sprocket, the first sprocket is connected to a second sprocket via a belt, and the second sprocket is coaxially connected to an input end of the reducer.

[0030] Furthermore, the cutting tool comprises a tool mounting plate and a chamfering tool, one end of the tool mounting plate is connected to the output end of the rotating unit, and the other end thereof is mounted with the chamfering tool.

[0031] Furthermore, the number of chamfering cutters is two, and the two chamfering cutters are symmetrically mounted on the tool mounting plate.

[0032] Furthermore, it also includes a cable straightening mechanism, which includes a pair of roller groups that are opposite to each other and have a reserved space for rotation.

[0033] The utility model has at least the following beneficial effects:

[0034] The utility model has the functions of high-voltage cable positioning and clamping, main insulation layer fixed angle, fixed length cutting, etc. It is used in the field of cable construction in the power industry, and the high-voltage cable joints are standardized according to the use requirements. It is suitable for 6-220kV voltage level, 70-1600mm 2 The main insulation layer of the cross-sectional area cable is stripped; the cutting length accuracy is ±1mm; the chamfer surface roughness (Ra) is less than 12μm; the processing efficiency is 6min / piece; and the total weight that can be operated by one person is less than 20Kg. It can greatly improve the production efficiency, reduce the time for fault repair, liberate the development of productivity, reduce the failure rate of cable joints in cable operation, reduce unnecessary economic losses, and promote the rapid development of the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0036] Figure 1 An axonometric view of a processing device for cutting the main insulating layer of a cable joint according to an embodiment of the utility model is shown.

[0037] Figure 2 A stereoscopic view of a clamping mechanism of a processing device for cutting the main insulating layer of a cable joint according to an embodiment of the utility model is shown.

[0038] Figure 3 A stereoscopic diagram of a feeding mechanism of a processing device for cutting the main insulating layer of a cable joint according to an embodiment of the utility model is shown.

[0039] Figure 4 A schematic diagram of the internal structure of a high-voltage cable according to an embodiment of the utility model is shown.

[0040] Figure 5 A schematic diagram of a high-voltage cable connector according to an embodiment of the utility model is shown.

[0041] Figure 6 A functional decomposition diagram of a processing device for cutting the main insulation layer of a cable joint according to an embodiment of the utility model is shown.

[0042] Figure 7 A schematic diagram showing the main functions of a processing device for cutting the main insulating layer of a cable joint according to an embodiment of the utility model is shown.

[0043] Figure 8 A functional structural schematic diagram of a processing device for cutting the main insulating layer of a cable joint according to an embodiment of the utility model is shown.

[0044] Fig. 9 The invention shows a process flow chart of cutting the main insulation layer of a cable joint according to an embodiment of the utility model.

[0045] Fig.10 A simplified diagram of a clamping and feeding mechanism according to an embodiment of the utility model is shown.

[0046] Fig.11 A simplified diagram of a cutting feed mechanism according to an embodiment of the utility model is shown.

[0047] Fig.12 A motion cycle diagram of a mechanism system according to an embodiment of the utility model is shown.

[0048] Fig.13 A simplified motion diagram of the clamping and feeding mechanism system according to an embodiment of the utility model is shown.

[0049] Fig.14 A simplified motion diagram of the feed mechanism system of a tool according to an embodiment of the utility model is shown.

[0050] Fig.15 A simplified motion diagram of the rotary mechanism system of a tool according to an embodiment of the utility model is shown.

[0051] Fig.16 A simplified motion diagram of a cutting feed mechanism system according to an embodiment of the utility model is shown.

[0052] In the figure, 100 is a clamping mechanism, 101 is a clamping moving unit, 1011 is a clamping moving slide rail, 1012 is a clamping moving screw rod, 1013 is a clamping moving motor, 1014 is a motor mounting plate, 1015 is a clamping moving screw rod bearing seat, 1016 is a clamping moving slider, 102 is a clamping claw, 1021 is a bottom plate, 1022 is a vertical support plate, 1023 is a clamping plate, 1024 is a clamping port, 200 is a feeding mechanism, 201 is a rotary Rotating unit, 2011 is a rotating motor, 2012 is a reducer, 2013 is a first sprocket, 2014 is a belt, 2015 is a second sprocket, 202 is a feed moving unit, 2021 is a feed moving slide rail, 2022 is a feed moving screw, 2023 is a feed moving motor, 2024 is a feed moving motor mounting plate, 2025 is a feed moving screw bearing seat, 2026 is a feed moving slider, 203 is a cutting tool, 2031 is a tool mounting plate, 2032 is a chamfering tool, 300 is a base, 401 is an inner semi-conductive layer, 402 is a main insulating layer, 403 is an outer semi-conductive cushion layer, 404 is an armor layer, 405 is a wrapping tape, and 406 is an inner protective layer. DETAILED DESCRIPTION

[0053] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0054] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The specific implementation of the utility model is further described in detail below in conjunction with the drawings and embodiments.

[0057] The utility model provides a processing device for cutting the main insulation layer of a cable joint, such as Figure 1 As shown, the processing device for cutting the main insulating layer of the cable joint includes a clamping mechanism 100 and a feeding mechanism 200;

[0058] The clamping mechanism 100 includes a clamping moving unit 101 and two clamping jaws 102, and the two clamping jaws 102 are movably disposed on the clamping moving unit 101;

[0059] The feeding mechanism 200 is disposed on one side of the clamping mechanism 100 , and includes a rotating unit 201 , a feeding moving unit 202 and a cutting tool 203 . The cutting tool 203 is assembled at the output end of the rotating unit 201 , and the rotating unit 201 is movably disposed on the feeding moving unit 202 .

[0060] In specific implementation, the cable connector is positioned and fixed by two clamping jaws 102. Specifically, the two clamping jaws 102 are moved away from each other and then moved closer to each other by the operation of the clamping moving unit 101, so that the cable connector can be fixed by the two clamping jaws 102. Subsequently, the rotating unit 201 works to drive the cutting tool 203 to rotate, and under the operation of the feeding moving unit 202, the rotating cutting tool 203 moves toward the fixed cable connector according to the set feed amount to complete the cutting.

[0061] In some embodiments, Figure 1 As shown, the processing device for cutting the main insulating layer of the cable connector also includes a base 300 , and the clamping mechanism 100 and the feeding mechanism 200 are both installed on the base 300 .

[0062] In some embodiments, Figure 2As shown, the clamping moving unit 101 includes a clamping moving slide rail 1011, a clamping moving screw 1012, a clamping moving motor 1013, a motor mounting plate 1014, a clamping moving screw bearing seat 1015, and a clamping moving slider 1016. The clamping moving slider 1016 is provided in two and both are movably mounted on the clamping moving slide rail 1011. The clamping moving motor 1013 is mounted on the motor mounting plate 1014. The clamping moving slider 1016 is coaxially connected to the clamping moving screw 1012. One end of the clamping moving screw 1012 is connected to the output end of the clamping moving motor 1013, and the other end thereof is connected to the clamping moving screw bearing seat 1015. Two clamping jaws 102 are respectively provided on two clamping moving sliders 1016.

[0063] The working principle of the clamping moving unit 101 is as follows:

[0064] The clamping moving motor 1013 is preferably a servo motor, and different rotation directions thereof will cause the clamping moving screw rod 1012 to rotate in different directions. For example, when the clamping moving screw rod 1012 rotates clockwise under the drive of the clamping moving motor 1013, the two clamping moving sliders 1016 will approach each other, and at this time, the two clamping jaws 102 will approach each other, and the cable connector between the two clamping jaws 102 can be fixed. On the contrary, when the clamping moving screw rod 1012 rotates counterclockwise under the drive of the clamping moving motor 1013, the two clamping moving sliders 1016 will move away from each other. For example, when the two clamping jaws 102 clamp the cable connector, the clamped cable connector will be loosened at this time to facilitate the removal of the cable connector, and at the same time, a placement space can be provided for the cable connector to be clamped.

[0065] In some embodiments, Figure 2 As shown, the clamping jaw 102 includes a base plate 1021, a vertical support plate 1022 and a plurality of clamping plates 1023, the base plate 1021 is fixed on the clamping movable slider 1016, the vertical support plate 1022 is connected to the base plate 1021, the plurality of clamping plates 1023 are installed on the vertical support plate 1022, and a clamping port 1024 is provided on the clamping plate 1023.

[0066] The clamping jaws 102 are mainly designed with a plurality of parallel clamping plates 1023 with clamping openings 1024 , so that the two clamping jaws 102 can better clamp and fix the cable connector.

[0067] In some embodiments, Figure 3As shown, the feed moving unit 202 includes a feed moving slide rail 2021, a feed moving screw 2022, a feed moving motor 2023, a feed moving motor mounting plate 2024, a feed moving screw bearing seat 2025, and a feed moving slider 2026. The feed moving slider 2026 is movably mounted on the feed moving slide rail 2021, the feed moving motor 2023 is mounted on the feed moving motor mounting plate 2024, the feed moving slider 2026 is coaxially connected to the feed moving screw 2022, one end of the feed moving screw 2022 is connected to the output end of the feed moving motor 2023, and the other end thereof is connected to the feed moving screw bearing seat 2025, and the rotating unit 201 is arranged on the feed moving slider 2026.

[0068] The working principle of the feeding moving unit 202 is as follows:

[0069] The feed moving motor 2023 is preferably a servo motor. When the feed moving motor 2023 rotates clockwise, the feed moving screw 2022 is driven to rotate clockwise, so that the feed moving slider 2026 moves toward the direction of the clamping mechanism 100. At this time, the rotating unit 201 with the cutting tool 203 moves toward the direction of the clamping mechanism 100, that is, the feed action is realized. Conversely, when the feed moving motor 2023 rotates counterclockwise, the retracting action is realized. Therefore, the feed amount and retracting amount can be realized by controlling the feed moving motor 2023.

[0070] In some embodiments, Figure 3 As shown, the rotating unit 201 includes a rotating motor 2011 and a reducer 2012 , and the output end of the rotating motor 2011 is connected to the input end of the reducer 2012 .

[0071] Specifically, the output end of the rotating motor 2011 is coaxially connected to the first sprocket 2013 , the first sprocket 2013 is connected to the second sprocket 2015 via a belt 2014 , and the second sprocket 2015 is coaxially connected to the input end of the reducer 2012 .

[0072] In some embodiments, Figure 3 As shown, the cutting tool 203 includes a tool mounting plate 2031 and a chamfering tool 2032 . One end of the tool mounting plate 2031 is connected to the output end of the rotating unit 202 , and the other end thereof is mounted with the chamfering tool 2032 .

[0073] There are two chamfering knives 2032, which are symmetrically mounted on the tool mounting plate 2031, thereby ensuring the effect of cutting the main insulation layer of the cable connector.

[0074] In some embodiments, a cable straightening mechanism is also included, and the cable straightening mechanism includes a pair of rollers that are opposite to each other and have a reserved space for rotation. That is, the cable connector is first straightened by the cable straightening mechanism before being fixed by the clamping mechanism 100, and then fixed, which can ensure that the cable connector is accurately fixed, thereby ensuring the cutting effect.

[0075] The following embodiments of the present invention will further illustrate the feasibility and advancement of the present invention in conjunction with the specific cutting objects of the device and the operation method thereof.

[0076] The high-voltage cables used in the production of high-voltage cable connectors are investigated. The investigation found that the high-voltage cables used in the production of high-voltage cable connectors are mainly the ones shown in Table 1 and Figure 4 The cable connector of the high-voltage cable is made by using the high-voltage cable with the structural parameters shown in the figure. According to the standard series of specifications of the cross-sectional area (unit of measurement) of the high-voltage cable core of my country, this embodiment mainly manufactures cable connectors for high-voltage cables with the cross-sectional area (unit of measurement) of 70, 95, 120, 150, 185, 240, 300, 400, 500, 630, 800, 1000, 1200, 1400, and 1600 of the high-voltage cable core. The corresponding high-voltage cable core diameters are (accurate to the single digit, unit of measurement: millimeter) 10, 12, 13, 14, 16, 18, 20, 23, 26, 29, 32, 36, 40, 43, and 46.

[0077] Table 1 Parameters of high voltage cables used in the study

[0078]

[0079] in Figure 4 The high voltage cable shown includes an inner semiconductive layer 401, a main insulating layer 402, an outer semiconductive cushion layer 403, an armor layer 404, a wrapping tape 405 and an inner sheath 406 arranged from top to bottom.

[0080] The main insulation layer material of high-voltage cables is mostly cross-linked polyethylene. Cross-linked polyethylene is a good insulating material with a bluish-white translucent color and high insulation resistance. It can withstand high power frequency and pulse electric field breakdown strength; it has a low dielectric loss tangent value; it has stable chemical properties, good heat resistance, and a long-term allowable operating temperature of 90°C; it has good mechanical properties and is easy to process and process.

[0081] When making cable joints, the operation should be continuous from the beginning of cable stripping until completion to shorten the insulation exposure time. The core and the retained insulation layer should not be damaged when stripping the cable. Cable joints should take measures such as strengthening insulation, sealing moisture-proofing, and mechanical protection. For power cable joints of 6kV and above, effective measures should be taken to improve the electric field concentration at the cable shield end, and the distance between the outer insulation phases and the ground should be ensured.

[0082] like Figure 5 As shown, the cable connector is beautiful, smooth, wrinkle-free and shiny. The chamfer length L1 is 20mm-40mm, the surface roughness (Ra) is 12μm, and the hidden danger of tip discharge is effectively eliminated. The cutting length accuracy is ±1mm, and the cutting length L2 is 100mm-150mm.

[0083] The processed high-voltage cables come from mass-produced high-voltage cable manufacturers or from high-voltage cable accident sites. my country's power cable lines reach 280,000 kilometers and are widely used in rail transit, port construction, construction engineering, park supporting and other fields. The demand for high-voltage cables is large, and the relevant companies have stable production quality and can provide large quantities of high-voltage cables. The cable joints processed by the cable joint main insulation layer cutting and processing device are of excellent quality. In application, the line failure rate is reduced by 1.5%, ensuring the reliability of power grid operation. The demand for the cable joint main insulation layer cutting and processing device is large, which is suitable for long-term mass production.

[0084] The overall function of the device proposed in this embodiment is to make cable joints for high-voltage cables. The overall functions are roughly divided into four types: cable cutting, cable straightening, cable fixing and clamping, and main insulation layer cutting. Cable cutting is mainly aimed at the cable joint part damaged by the accident, and further operations are carried out after the damaged cable is cut off; cable straightening is mainly aimed at bent cables, and the bent cables are straightened before cutting to ensure the cutting quality; cable fixing and clamping mainly includes the positioning and clamping functions of the high-voltage cable, which further improves the quality of the cable joint; main insulation layer cutting mainly includes the rotation of the tool, the feeding of the tool, and the adjustment of the tool. The cable joint main insulation layer cutting processing device is decomposed as follows: Figure 6 As shown in the figure, the main functions of the cable joint main insulation layer cutting and processing device are as follows: Figure 7 shown.

[0085] The cable joint main insulation layer cutting and processing device is suitable for various situations of high-voltage cables. The cable joint main insulation layer cutting and processing device can be used to make cable joints in different situations. The functional structure of the cable joint main insulation layer cutting and processing device is as follows: Figure 8 shown.

[0086] The cable joint main insulation layer cutting and processing device is suitable for making cable joints in various situations of high-voltage cables. For new straight high-voltage cables, the cable cutting and cable straightening functions of the cable joint main insulation layer cutting and processing device are rarely used, so the cable cutting and cable straightening functions are mainly combined with existing perfect equipment. The cable fixing and clamping function solution matrix of the cable joint main insulation layer cutting and processing device is shown in Table 2. The main insulation layer cutting function solution matrix of the cable joint main insulation layer cutting and processing device is shown in Table 3.

[0087] Table 2 Functional explanation of cable clamping function

[0088]

[0089] Table 3 Functional solution corresponding to the main insulation layer cutting function

[0090]

[0091] In combination with the above analysis, the principle scheme of the cable joint main insulation layer cutting processing device proposed in this embodiment is as follows: the cable is fixed and clamped by a stepper motor to drive the transmission mechanism and the guide mechanism, the transmission mechanism adopts a ball screw, and the guide mechanism adopts a linear guide; the power source of the main insulation layer cutting function is an AC servo motor, the tool size is adjusted by gear racks, the tool rotation relies on a servo motor, and the tool feed adopts a ball screw; the cable cutting part is combined with the cable clamping function, and the existing visual cable cutting knife is used for cutting; the cable straightening is also combined with the cable clamping device to use the pressing force of the straightening roller to straighten the cable.

[0092] The common method of making cable joints currently used is manual cutting. As the main method of processing cable joints, it needs to be made with tools such as electrician's knives and saw bows. This method is widely applicable and low in cost, but has poor applicability, low process level and low efficiency, which seriously restricts the safe and reliable operation of cables and the rapid development of power grids. In addition to manual cutting of high-voltage cable joints, there are a variety of cable joint main insulation layer cutting and processing devices on the market, mainly including: cable main insulation layer cutting pliers, high-voltage cable insulation layer stripping knives, and electric cable main insulation layer strippers. An investigation of the use of the three devices found that the three devices all have obvious defects such as low processing accuracy and low degree of automation. The cable main insulation layer cutting pliers cannot process chamfers and mainly rely on manual cutting; the high-voltage cable insulation layer stripping knife has high chamfering roughness and low electric degree, and also needs to rely on manual cutting; the electric cable main insulation layer stripper has poor applicability and cannot cut damaged cables or straighten bent cables.

[0093] A comprehensive analysis of the manufacturing process of cable joints shows that it mainly includes the steps of cable straightening, cable fixing and clamping, cable cutting, and main insulation layer cutting. The main technical difficulty is to use multiple technologies to straighten the high-voltage cable, position and clamp the cable, and cut the main insulation layer at a fixed angle and length in one device. The focus is on cutting the main insulation layer of the high-voltage cable without damaging the wire core.

[0094] Therefore, the process method of the processing device proposed in this embodiment is determined as follows: the motor drives the straightening and clamping of the high-voltage cable to be processed, and the motor drives the cutter head to rotate and feed to cut the main insulation layer of the high-voltage cable.

[0095] The main insulation layer cutting process of cable connector is as follows: Fig. 9 shown.

[0096] The main insulation layer cutting process of the cable joint is mainly divided into 8 steps. First, the high-voltage cable passes through the cable straightening device and completes the cable straightening work under the pressure of the roller. Then it continues to be transported forward. After the high-voltage cable is positioned, it is clamped by the clamping device driven by the lead screw slide. If there is waste cable at this time, the waste cable is cut off and repositioned and clamped. After the high-voltage cable is fixed and tightened, the tool is manually adjusted according to the cable size. After the tool adjustment is completed, the servo motor drives the tool to rotate, and the entire cutting power head feeds to cut the main insulation layer. After cutting a fixed length, the tool stops rotating, the tool is manually retracted, the cutting power head is retracted, the cable joint cutting is completed, the clamping device is released, and the high-voltage cable joint is completed. The process flow chart roughly shows the main overall layout of this device.

[0097] The main process parameters during the operation of the device will be calculated below.

[0098] Analysis of quality attributes of cable joint main insulation layer cutting device:

[0099] (1) The cutting and straightening effect and surface condition of the high-voltage cable: the quality of the high-voltage cable, the quality of processing, whether there is damage, scratches, mud, oil and other impurities;

[0100] (2) High-voltage cable dimensions: outer diameter, core diameter, insulation thickness;

[0101] (3) Cable joint chamfer: geometric parameters such as angle and length;

[0102] (4) Cable joint length: cutting length and total joint length;

[0103] (5) Cutting speed: physical quantities such as surface roughness;

[0104] (6) Equipment weight of the cable joint main insulation layer cutting and processing device: within 20kg;

[0105] (7) Cutting efficiency: processing time of a single cable connector.

[0106] High-voltage cable cutting and straightening effect and surface condition: High-voltage cable quality, processing quality, whether there is damage, scratches, mud, oil and other impurities affecting factors:

[0107] (1) The cutting condition of waste high-voltage cables. Inadequate cutting affects the processing quality.

[0108] (2) The high-voltage cable is not straightened properly, and the high-voltage cable is bent, which affects the tool feed and damages the tool, thus affecting the processing accuracy and quality;

[0109] (3) Types and chemical and physical properties of impurities: Viscous oil stains have strong adhesion, high connection strength, are difficult to clean, and are more difficult to process;

[0110] (4) The internal core of the cable must not be damaged during the cutting and straightening process;

[0111] (5) Cut off the straightening and clearing operation time;

[0112] (6) If mechanical force is used to remove impurities, the cleaning speed and removal force;

[0113] (7) Cleaning brush material, density, strength, and coverage;

[0114] (8) Principles and methods of damage and scratch inspection.

[0115] High voltage cable size: outer diameter, core diameter, insulation thickness Influencing factors:

[0116] (1) The outer diameter of the high-voltage cable and the clamping accuracy;

[0117] (2) High-voltage cable core diameter, processing time, and processing accuracy;

[0118] (3) Thickness of high-voltage cable insulation layer, cutting depth, feed rate, and cutting speed;

[0119] (4) If the chips are not completely broken during the cutting process, the processing quality will be affected;

[0120] (5) Cutting operation time.

[0121] After clarifying the key attributes of production quality and the factors affecting each quality attribute, the following relevant information was obtained through manual query: Cutting processing equipment: main cutting process parameters of cutting the main insulation layer (similar to turning processing).

[0122] (1) Tool selection: The tool material is diamond, and the processing chamfer is 45°.

[0123] (2) The amount of back cutting during the machining process a p .

[0124] (3) Tool processing feed rate f.

[0125] (4) Tool cutting speed.

[0126] (5) Cutting torque.

[0127] Manual query method: Cutting processing equipment: main cutting process parameters of cutting the main insulation layer (similar to turning).

[0128] The workpiece material is cross-linked polyethylene (plastic), σ b=20MPa. Processing requirements: The workpiece should be stripped to the wire core diameter (here, the wire core diameter is 10mm and the insulation layer thickness is 7.4mm).

[0129] 1. Determine the back cutting amount a p The tool uses two diamond blades to turn the high-voltage cable to The maximum cutting depth of each blade is 3.2mm.

[0130] 2. Determine the feed rate f. The material of the workpiece is plastic, the processing diameter is 17.4mm, and the back cutting depth a p =3.2mm. According to 8.4-18 in the machining process manual, the feed rate f = 0.3 ~ 0.5mm, and the interpolated value is f = 0.5mm.

[0131] 3. Determine the cutting speed. According to the tool material of diamond, the back cutting depth ap = 3.2mm, the feed rate f = 0.5mm, and the interpolation of 8.4-18 in the mechanical processing technology manual table, the cutting speed V = 150m / min = 2.5m / s.

[0132] In summary, the back cutting amount a p =3.2mm, feed rate f=0.5mm / r, cutting speed V=90m / min.

[0133] The process movements of the mechanical products designed for the cable joint main insulation layer cutting device are mainly shown in Table 4. The process movements are mainly divided into clamping feed, tool feed, tool rotation and cutting feed. Clamping feed is mainly the movement of the clamping part in the cable joint main insulation layer cutting device, which is linear feed clamping; tool feed is the process of adjusting the tool, which is also a linear motion; tool rotation is an important movement for the tool to cut, which is a rotational motion; cutting feed is a linear feed motion in the cable main insulation layer cutting process.

[0134] Table 4 Classification of motion characteristics of process actions

[0135]

[0136]

[0137] In the design of the cable joint main insulation layer cutting device, the motion characteristics of the process action of the three-core high-voltage cable shell stripping part device are similar to those of the main cutting device, so refer to Table 4.

[0138] The design of the cutting processing device for the main insulation layer of the cable connector is based on the process action to be realized and the motion characteristics of the process action. The actuator is selected, the screw-line guide mechanism is selected for the clamping and feeding process action, the gear rack mechanism is selected for the tool feeding process action, the power head is selected for the tool rotation process action, and the screw-line guide mechanism is selected for the cutting feed process action.

[0139] In the design of the cable joint main insulation layer cutting processing device, the clamping feed process action of the three-core high-voltage cable casing stripping part device is selected as a screw-line rail mechanism, the rotation process action of the tool is selected as a gear ring mechanism, and the feed process action of the tool and the cutting feed process action are selected as a screw-line rail mechanism.

[0140] The clamping and feeding process of the cable joint main insulation layer cutting device selects the screw linear rail mechanism, the feeding process of the tool selects the gear rack mechanism, the rotation process of the tool selects the power head, and the cutting feed process selects the screw linear rail mechanism. The specific mechanism diagram is as follows Fig.10 shown.

[0141] The clamping and feeding process action of the cable connector main insulation layer cutting device selects the screw linear guide mechanism, and the positive and negative bidirectional screw linear guide drives the clamping jaws to move for clamping and feeding to achieve the clamping requirements.

[0142] The feeding process action of the tool of the cable joint main insulation layer cutting processing device adopts a gear rack mechanism. Through the relative movement of the gear rack, the gear rack tooth pitch realizes different size positions, thereby realizing automatic adjustment of the tool.

[0143] The rotary process action of the tool of the cable connector main insulation layer cutting device is to use a power head, such as Fig.11 As shown, the s35-mt3 power head is selected to realize the rotation movement of the tool through the power head.

[0144] The overall structure of the cable joint main insulation layer cutting device is as follows: Figure 1 As shown, the high-voltage cable is clamped by driving the clamping claws through the screw linear guide mechanism, the tool is fed by the gear rack mechanism, the tool adjustment work is automatically completed, and the motor drives the power head to realize the rotation of the tool, and the screw linear guide mechanism completes the cutting feed, and finally a high-standard cable connector is produced.

[0145] By analyzing the cable joint manufacturing process, combined with the currently determined mechanism to realize the process action, the various mechanisms are coordinated to complete the entire work cycle, thereby further improving the production efficiency of the cable joint main insulation layer cutting processing device. Fig.12 The motion cycle diagram shown expresses the real-time status of the equipment completing the working cycle.

[0146] The working status and operation of the four main working mechanisms of the mechanism system motion cycle diagram of the cable joint main insulation layer cutting processing device. At point 1, the clamping mechanism starts to move and clamps the high-voltage cable; at point 2, the clamping feed ends, the high-voltage cable is clamped, and the tool adjustment begins at the same time, and the tool feed movement begins; at point 3, the tool adjustment is completed and the tool starts to rotate, and the cutting feed preparation begins; at point 4, the cutting feed is completed; at point 5, the tool rotation preparation stops; at point 6, the tool rotation stops, and the tool begins to prepare to retract; at point 7, the tool retracts, and the cutting feed preparation retracts; at point 8, the cutting feed retracts, and the clamping device prepares to retract; when the clamping mechanism retracts, the cable joint is completed, a process ends, and it is ready to enter the next cycle.

[0147] The clamping and feeding process action of the cable connector main insulation layer cutting processing device selects the screw linear guide mechanism, the feeding process action of the tool selects the gear rack mechanism, the rotating process action of the tool selects the power head, and the cutting and feeding process action selects the screw linear guide mechanism.

[0148] The screw guide mechanism selected for the clamping and feeding process action is mainly used for cutting and making cable joints for high-voltage cables with diameters of 10mm to 50mm through analysis of the diameter of high-voltage cables. Therefore, the screw guide uses a positive and negative tooth bidirectional screw guide, with a single-side stroke of 50mm, a jaw length of 80mm, a width of 75mm, and a height of 10mm. The specific structure is as follows Fig.13 shown.

[0149] The feeding process of the tool adopts a gear rack mechanism, which is based on the thickness of the main insulation layer of the high-voltage cable and the core diameter. Fig.14 As shown, the single-side stroke of the tool is 20mm, and a double-knife symmetrical structure is adopted to increase cutting efficiency.

[0150] The rotary action of the tool is to select a power head. Considering the feed motion and cutting action of the tool, combined with the cutting characteristics of the tool and the requirements of the cutting speed and cutting force of the main insulation layer of the cable, the relevant information is consulted and finally the s35-mt3 power head is selected. The total length of the power head is 275mm. The specific structure is as follows Fig.15 shown.

[0151] The cutting feed process uses a screw linear guide mechanism. By checking the cable connector length requirements and combining the overall device structure design, a screw linear guide with a stroke of 150mm is selected. The specific mechanism is as follows Fig.16 shown.

[0152] The overall mechanism system motion diagram of the cable joint main insulation layer cutting device is as follows Figure 1As shown, the stepper motor drives the screw linear guide mechanism to move, and the slider on the screw linear guide is connected to the clamping claw. The motor drives the slider to move to achieve the clamping of the high-voltage cable. After the control system identifies the diameter of the high-voltage cable and the core diameter, the tool is fed through the gear rack mechanism to automatically complete the tool adjustment work, and the servo motor drives the power head to realize the rotation of the tool, and then the stepper motor drives the screw linear guide mechanism to move, and the slider on the screw linear guide is connected to the power head, tool and other cutting devices, and the cutting feed is completed through motor control, and finally a high-standard cable connector is produced.

[0153] The kinematic analysis and dynamic analysis of the device proposed in this embodiment are performed below.

[0154] For the clamping feed mechanism: pre-select 57 stepper motor, select 1605 lead screw, lead 5mm F = MG = 5KG * 10N / KG = 50N

[0155] T=F*Pb / 2π=50N*0.05M / 2 / 3.14=0.40NM

[0156] N=V*60*1000 / Pb=0.02m / s*60*1000 / 5mm=240r / min

[0157] Assume that the stepper motor speed is 500r / min (the stepper motor speed is between 300-600)

[0158] i=500 / 240=2.08(take the integer 2)

[0159] Because the reducer is added, the motor torque is T / i=0.40 / 2=0.02NM (theoretical value)

[0160] η=0.96*0.97*0.97*0.9=0.8

[0161] The actual required motor torque is T*K / η=0.02NM*1.5 / 0.8=0.0375NM

[0162] Combined with the existing data, taking into account factors such as equipment installation and overall weight, the motor selected is the stepper motor 57H115H4204A2.

[0163] For the cutting feed mechanism: considering that the load weight is similar to that of the clamping feed mechanism, 1605 screw is also selected, so the calculation process is similar to that of the clamping mechanism.

[0164] F=MG=5KG*10N / KG=50N

[0165] T=F*Pb / 2π=50N*0.05M / 2 / 3.14=0.40NM

[0166] N=V*60*1000 / Pb=0.02m / s*60*1000 / 5mm=240r / min

[0167] At the same time, considering the manufacturing and control factors of the same equipment, the stepper motor 57H115H4204A2 is also selected.

[0168] For the tool rotation mechanism: a power head is used to drive the tool to rotate, and a servo motor is initially planned to be used, assuming that the servo motor speed is 3000r / min.

[0169] J=MR^2=5kg*0.04m*0.04m=0.008kgm^2

[0170] ω=2πN / 60=2*3.14*600 / 60=61.8rad / s

[0171] β=ω / t=61.8rad / s / 0.5s=123.6rad / s^2

[0172] T=j*β=0.008kgm^2*123.6rad / s^2=0.998NM

[0173] N=v*60*1000 / (2πr)=0.2m / s*60*1000 / 2 / 3.14 / 40mm=47.8r / min

[0174] i = 3000 / 47.8 = 62.76 (rounded to 60)

[0175] So the motor acceleration torque is T / i=0.998 / 60=0.017NM

[0176] The motor torque is T*K / η=0.017NM*2 / 0.8=0.043NM

[0177] Inertia matching j = J / (i^2*3) = 0.008kgm^2 / 60 / 60 / 3 = 0.00000074

[0178] Therefore, considering factors such as equipment installation and overall weight, the servo motor MHMF042L1U2M was selected.

[0179] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The scope of patent protection of the present invention should be limited by the claims.

Claims

1. A processing device for cutting the main insulation layer of a cable joint, characterized in that: It includes a clamping mechanism and a feeding mechanism; The clamping mechanism comprises a clamping movable unit and two clamping jaws, and the two clamping jaws are movably arranged on the clamping movable unit; The feeding mechanism is arranged at one side of the clamping mechanism, and comprises a rotating unit, a feeding moving unit and a cutting tool, wherein the cutting tool is assembled at the output end of the rotating unit, and the rotating unit is movably arranged at the feeding moving unit.

2. The processing device for cutting the main insulation layer of a cable joint according to claim 1, characterized in that: It also includes a base, and the clamping mechanism and the feeding mechanism are both installed on the base.

3. The processing device for cutting the main insulation layer of a cable joint according to claim 1, characterized in that: The clamping movable unit includes a clamping movable slide rail, a clamping movable screw, a clamping movable motor, a motor mounting plate, a clamping movable screw bearing seat, and a clamping movable slider. The clamping movable slider is provided with two and both are movably mounted on the clamping movable slide rail. The clamping movable motor is mounted on the motor mounting plate. The clamping movable slider is coaxially connected to the clamping movable screw. One end of the clamping movable screw is connected to the output end of the clamping movable motor, and the other end is connected to the clamping movable screw bearing seat. Two clamping claws are respectively arranged on the two clamping movable sliders.

4. The processing device for cutting the main insulation layer of a cable joint according to claim 3, characterized in that: The clamping jaws include a base plate, a vertical support plate and a plurality of clamping plates, the base plate is fixed on the clamping movable slider, the vertical support plate is connected to the base plate, the plurality of clamping plates are mounted on the vertical support plate, and the clamping plates are provided with clamping openings.

5. The processing device for cutting the main insulation layer of a cable joint according to claim 1, characterized in that: The feed moving unit includes a feed moving slide rail, a feed moving screw, a feed moving motor, a feed moving motor mounting plate, a feed moving screw bearing seat, and a feed moving slider. The feed moving slider is movably mounted on the feed moving slide rail, the feed moving motor is mounted on the feed moving motor mounting plate, the feed moving slider is coaxially connected to the feed moving screw, one end of the feed moving screw is connected to the output end of the feed moving motor, and the other end is connected to the feed moving screw bearing seat, and the rotating unit is arranged on the feed moving slider.

6. The processing device for cutting the main insulation layer of a cable joint according to claim 5, characterized in that: The rotating unit includes a rotating motor and a reducer, and an output end of the rotating motor is connected to an input end of the reducer.

7. The processing device for cutting the main insulation layer of a cable joint according to claim 6, characterized in that: The output end of the rotating motor is coaxially connected to the first sprocket, the first sprocket is connected to the second sprocket through a belt, and the second sprocket is coaxially connected to the input end of the reducer.

8. The processing device for cutting the main insulation layer of a cable joint according to claim 1, characterized in that: The cutting tool comprises a tool mounting plate and a chamfering tool. One end of the tool mounting plate is connected to the output end of the rotating unit, and the other end of the tool mounting plate is mounted with the chamfering tool.

9. The processing device for cutting the main insulation layer of a cable joint according to claim 8, characterized in that: The number of the chamfering cutters is two, and the two chamfering cutters are symmetrically mounted on the tool mounting plate.

10. The processing device for cutting the main insulation layer of a cable joint according to claim 1, characterized in that: The invention also comprises a cable straightening mechanism, which comprises a pair of roller assemblies which are opposite to each other and have a reserved space for rotation.

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