Welding and cutting-off device and method for plastic spiral supporting pipe for cable accessory

Abstract

The invention discloses a welding and cutting device and method for a plastic spiral supporting pipe for a cable accessory, and relates to the technical field of cable hose production. The welding and cutting-off device for the plastic spiral supporting pipe for the cable accessory comprises a welding assembly, the welding assembly enables the spiral supporting pipe to be formed in the axial direction and to rotate and move, and at least one set of rotary encoders are arranged on one side of the axial moving path of the spiral supporting pipe. Cutting discs with the same number as the rotary encoders are arranged on the axial moving path of the cutting disc spiral supporting pipe and staggered from the rotary encoders, and a cutter is arranged on one side of each cutting disc. In the continuous manufacturing and forming process of the spiral supporting pipe, the rotary encoder is attached to the spiral supporting pipe to generate passive rotation, the moving length of the spiral supporting pipe is metered, meanwhile, the cutting disc gets close to the spiral supporting pipe to prepare for cutting off the spiral supporting pipe, and then the cutting disc is controlled to synchronously move and rotate along with the spiral supporting pipe; and during synchronous movement, the cutter is automatically pushed out, and the spiral supporting pipe is cut off.

Description

Technical Field

[0001] The present invention relates to the technical field of cable hose production, and specifically to a plastic spiral support pipe welding and cutting device and method for cable accessories. Background Art

[0002] Plastic spiral pipes are a common type of pipe. Compared with traditional straight pipes, spiral pipes have better flexibility and pressure resistance. Due to their special structure, spiral pipes are widely used in many fields. For example, in power engineering, spiral pipes are used to make protective sleeves for cables. Because the bending radius of spiral pipes is small, they can better adapt to the routing of cable lines, reduce the bending and friction of cables, and extend the service life of cables. Cable plastic spiral pipes are usually produced by extrusion molding process.

[0003] For example, the Chinese patent with the publication number CN114932699B discloses a hose production device and process. In the process of manufacturing hoses, when the hose is produced to a certain length, the driving body is controlled to send the cutting tool of the pipe section cutting device to the specified cutting surface position of the hose, and the cutting tool rotates along the cutting surface of the hose to perform the cutting process on the hose, so as to move the cut hose away from the current processing station and carry out the processing of the next process.

[0004] However, in the production process of existing plastic hoses, their cutting devices usually only have a single fixed-point cutting ability. The hose needs to be kept stationary to perform the cutting process on the cutting surface of the hose, resulting in poor stability of the continuous forming of the hose and slow continuous production efficiency of the hose. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a plastic spiral support pipe welding and cutting device and method for cable accessories, which solves the problems raised in the background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A plastic spiral support pipe welding and cutting device and method for cable accessories.

[0007] On the one hand, the present invention provides a plastic spiral support tube welding and cutting device for cable accessories, comprising: a winding mold, which is arranged on a machine head and is used to wind a support bar material; a welding assembly, which is used to weld the support bar material cyclically wound on the winding mold, and cyclically weld the support bar material to form a spiral support tube, so that the spiral support tube is formed along its axial direction and moves axially in a spiral propulsion manner; a rotary encoder, which is arranged on the moving path of the spiral support tube, and at least one group is provided. The rotary encoder contacts the spiral support tube and passively rotates to measure the moving length of the spiral support tube and apply a guide limit; a cutting disk, which is staggered with the rotary encoder and is arranged on the moving path of the spiral support tube, and at least one group is provided. The cutting disk moves synchronously with the rotary encoder close to the spiral support tube, and a cutter is provided on one side of the end face of the cutting disk. The cutter is used to extend itself after the spiral support tube moves to a specified length and cut off the spiral support tube.

[0008] Furthermore, it also includes: a sliding shaft, which is arranged in the middle of the cutting disk, and the cutting disk can slide on the sliding shaft, and the sliding shaft is provided with an inclined guide rail along its axial direction; a pressure column, which is arranged at one end of the cutter close to the sliding shaft, and when the cutting disk moves synchronously with the spiral support tube, the pressure column moves along the inclined guide rail, and the inclined guide rail is used to push the cutter to gradually extend relative to the cutting disk and cut off the spiral support tube.

[0009] Furthermore, it also includes a reset groove provided at one end of the inclined guide rail and a sunken groove provided at the other end of the inclined guide rail. After the pressure column moves to the top of the inclined guide rail, it sinks into the sunken groove and moves in the opposite direction along the other side of the inclined guide rail. When passing through the reset groove, it moves up and is pushed to the bottom of the inclined guide rail, so that the cutter is reset after cutting.

[0010] Furthermore, it also includes: a spring, which is arranged in the cutting disk and has a lifting guide rod sleeved in the spring; a lifting slide, which can be sleeved on the lifting guide rod and fixedly connected to the cutter, so that the cutter is subjected to the centripetal pressure of the cutting disk.

[0011] Furthermore, it also includes a telescopic rod, which is assembled at the center of the winding mold; an inner support column is provided at the end of the telescopic rod away from the winding mold, and the inner support column is staggered with the cutter to provide support for the spiral support tube when the cutter cuts the spiral support tube.

[0012] Furthermore, it also includes a screw propulsion mechanism, one end of the screw propulsion mechanism controls the inner support column to move along with the spiral support tube through the first support arm, and the other end of the screw propulsion mechanism controls the cutter to move along with the spiral support tube through the second support arm, so that the inner support column and the cutter move synchronously with the spiral support tube, forming a state of fixed-point internal support and cutting of the spiral support tube.

[0013] Further, driving components are provided on both sides of the rotary encoder and the cutting disc for driving the synchronous movement of the rotary encoder and the cutting disc and driving the rotation of the cutting disc after movement; the driving components include: a first housing located between the welding component and the rotary encoder. The first housing is provided with a first sliding table along the circumferential direction. The first sliding table fixedly supports the rotary encoder. The number of the first sliding tables is twice that of the rotary encoder, and the first sliding table close to the rotary encoder and the first sliding table far from the rotary encoder move in opposite directions; a second housing is provided on the side of the cutting disc far from the first housing away from the first housing. The second housing is provided with a second sliding table along its circumferential direction. The number of the second sliding tables is the same as that of the cutting discs. A support seat for supporting the cutting disc is provided on one side of the second sliding table; a first driving shaft is provided on one side of the first housing and the second housing for driving the synchronous movement of the first sliding table and the second sliding table, so that the rotary encoder and the cutting disc synchronously approach the spiral support tube.

[0014] Further, the driving components further include: a second driving shaft provided on the central axis of the rotary encoder and the support seat. Among them, the second driving shaft is rotationally connected to the rotary encoder through a bearing sleeve. The second driving shaft is slidably connected to the cutting disc through the support seat, and the second driving shaft is coaxial with the sliding shaft; a first pulley is provided on the first sliding table far from the rotary encoder; a second pulley is provided on the first sliding table close to the rotary encoder, and the second pulley is fixedly connected to the second driving shaft. There is a transmission belt between the second pulley and the first pulley. When the first sliding table drives the movement of the rotary encoder, the first sliding table close to the rotary encoder and the first sliding table far from the rotary encoder move in positive and negative directions, driving the synchronous positive and negative movement of the second pulley and the first pulley, compensating for the slack between the two sets of pulleys and the transmission belt caused by moving the rotary encoder, and always maintaining the tension of the two sets of pulleys and the transmission belt.

[0015] Further, both the first driving shaft and the second driving shaft are of a rhombic shaft structure, enabling the cutting disc to have the ability to move coaxially with the rotary encoder close to the spiral support tube and rotate relative to the rotary encoder.

[0016] On the other hand, the present invention also provides a method for welding and cutting a plastic spiral support tube for cable accessories, including the following steps: Step 1: The support strip material is introduced into the winding die in a coiling and unwinding manner after being guided and pulled by the traction wheel. By using the cyclic winding of the support strip material by the winding die and the synchronous welding of the welding component, the support strip material is cyclically welded into a spiral support tube, and the spiral support tube moves axially in a spiral advancing manner; Step 2: When the spiral support tube is being pushed forward, the driving rotary encoder moves synchronously with the cutting disc, enabling the rotary encoder to measure the length of the spiral support tube and bringing the cutting disc closer to the spiral support tube to pre-adjust the cutting position of the cutting disc. Step 3: When the rotary encoder measures that the spiral support tube has reached the specified length, control the inner support column and the cutting disc to extend forward synchronously with the spiral support tube. Gradually push out the cutter through the inclined plane guide rail, and use the inner support column as the cutting platform to cut the continuously moving spiral support tube at a fixed point. After cutting, the spiral support tube slides and discharges along the discharge chute. At the same time, control the inner support column and the cutter to reset to prepare for the next cutting of the spiral support tube.

[0017] The present invention has the following beneficial effects: (1) For the plastic spiral support tube welding and cutting device for cable accessories, during the continuous production and forming process of the spiral support tube, control the rotary encoder and the cutting disc to move synchronously towards the spiral support tube. Through the passive rotation generated by the fitting of the rotary encoder and the spiral support tube, measure the moving length of the spiral support tube. At the same time, bring the cutting disc closer to the spiral support tube to prepare for cutting the spiral support tube. After the rotary encoder measures the specified moving length of the spiral support tube, control the cutting disc to move and rotate synchronously with the spiral support tube, and push out the cutter during the synchronous movement to cut the spiral support tube, realizing the non-stop production and cutting process of the spiral support tube, improving production efficiency and enhancing production stability.

[0018] (2) For the plastic spiral support tube welding and cutting device for cable accessories, by moving the rotary encoder and the cutting disc synchronously towards the spiral support tube, on the one hand, it enables the rotary encoder to not only rotate and measure the spiral support tube but also have the ability of guiding and limiting, reducing the yaw generated during the movement of the spiral support tube, and being able to pre-adjust the cutting orientation of the cutting disc to make the cutting disc as close as possible to the spiral support tube to reduce the cutting movement path of the cutting disc and improve cutting efficiency. On the other hand, it has the characteristics of flexible regulation and can adapt to the movement measurement and synchronous cutting work of spiral support tubes of different sizes.

[0019] (3) For the plastic spiral support tube welding and cutting device for cable accessories, the cutting disc and the inner support column are pushed to move synchronously with the movement of the spiral support tube through the screw propulsion mechanism. During the movement of the cutting disc, gradually push out the cutter, and use the inner support column as the cutting platform to cut the continuously moving spiral support tube at a fixed point, enabling the spiral support tube to be cut at a fixed point without stopping during continuous production and forming, improving the production efficiency of the spiral support tube.

[0020] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. Description of the Drawings

[0021] Figure 1Schematic diagram of the overall structure of the present invention Figure 1 ; Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 ; Figure 3 Schematic diagram of the parallel structure of the cutting disc and the inner support column in the present invention; Figure 4 Schematic diagram of the structure of the welding assembly in the present invention; Figure 5 Partial cross-sectional view of the welding assembly in the present invention; Figure 6 Schematic diagram of the feeding in the present invention; Figure 7 First assembly schematic diagram of the rotary encoder and the cutting disc in the present invention; Figure 8 Second assembly schematic diagram of the rotary encoder and the cutting disc in the present invention; Figure 9 First driving schematic diagram of the rotary encoder and the cutting disc in the present invention; Figure 10 Second driving schematic diagram of the rotary encoder and the cutting disc in the present invention; Figure 11 Assembly schematic diagram of the rotary encoder in the present invention; Figure 12 First moving driving schematic diagram of the rotary encoder in the present invention; Figure 13 Second moving driving schematic diagram of the rotary encoder in the present invention; Figure 14 First moving driving schematic diagram of the cutting disc in the present invention; Figure 15 Second moving driving schematic diagram of the cutting disc in the present invention; Figure 16 Rotary driving schematic diagram of the cutting disc in the present invention; Figure 17 Rotary driving plan view of the cutting disc in the present invention; Figure 18 First driving schematic diagram of the cutting knife in the present invention; Figure 19 Second driving schematic diagram of the cutting knife in the present invention; Figure 20 Force schematic diagram of the cutting knife in the present invention; Figure 21 Cutting state change diagram of the present invention, where (a), (b), (c), (d), and (e) are the first cutting state diagram, the second cutting state diagram, the cutting reset starting point state diagram, the cutting reset path state diagram, and the cutting reset end point state diagram of the cutting knife in the present invention in sequence.

[0022] In the figure, 1 is a support platform; 2 is a speed reduction drive motor; 3 is a winding die; 4 is a housing; 5 is an ultrasonic welding head; 6 is a first casing; 7 is a first motor; 8 is a rotary encoder; 9 is a second casing; 10 is a discharge chute; 11 is a support seat; 12 is a cutting disc; 13 is a cutter; 14 is a first drive shaft; 15 is a second drive shaft; 16 is a first support arm; 17 is a telescopic rod; 18 is an inner support column; 19 is a second support arm; 20 is a screw propulsion mechanism; 21 is a screw rod lifting guide rail; 22 is a first sliding table; 23 is a second sliding table; 24 is a first circular rail; 25 is a second circular rail; 26 is a second motor; 27 is a first gear; 28 is a second gear; 29 is a first external gear disc; 30 is a first internal gear disc; 31 is a third gear; 32 is a fourth gear; 33 is a fifth gear; 34 is a second external gear disc; 35 is a second internal gear disc; 36 is a sixth gear; 37 is a first pulley; 38 is a transmission belt; 39 is a tensioning pulley; 40 is a second pulley; 41 is a material guiding pipe; 42 is a first transmission shaft; 43 is a seventh gear; 44 is an eighth gear; 45 is a first rack; 46 is a ninth gear; 47 is a second transmission shaft; 48 is a tenth gear; 49 is a second rack; 50 is a sliding shaft; 51 is an inclined plane guide rail; 52 is a pressure-bearing column; 53 is a support arm; 54 is a relief groove; 55 is a reset groove; 56 is a sunken grooving; 57 is a lifting guide rod; 58 is a spring; 59 is a lifting sliding seat. Detailed implementation manners

[0023] Please refer to Figures 1 - 21 In this embodiment of the present invention, a technical solution is provided: a plastic spiral support pipe welding and cutting device and method for cable accessories. On the one hand, the present invention provides a plastic spiral support pipe welding and cutting device for cable accessories. Please refer to Figures 1 - 6 In this plastic spiral support pipe welding and cutting device for cable accessories, it includes a winding die 3. The winding die 3 is arranged on the head of the welding assembly. Among them, the welding assembly includes a speed reduction drive motor 2. The head of the speed reduction drive motor 2 supports the winding die 3, and there is a housing 4 above the speed reduction drive motor 2. A screw rod lifting guide rail 21 is arranged inside the housing 4, and an ultrasonic welding head 5 is arranged on the lifting sliding table of the screw rod lifting guide rail 21. When guiding and pulling the support strip material into the winding die 3 through a traction wheel, control the screw rod lifting guide rail 21 to drive the ultrasonic welding head 5 to move downward, so that the ultrasonic welding head 5 moves down to the winding die 3 and presses against the support strip material wound on the outer surface of the winding die 3. Then control the speed reduction drive motor 2 to drive the core shaft of the winding die 3 to rotate, continuously wind the support strip material, and use the ultrasonic welding head 5 to continuously weld the wound support strip material, so that the support strip material is circularly welded into a spiral support pipe and moves in a spiral manner along its axis.

[0024] As a further aspect of this embodiment, at least one set of rotary encoders 8 is provided on one side of the axial movement path of the spiral support tube. When multiple sets of rotary encoders 8 are provided, they are symmetrically arranged along the circumference of the spiral support tube (e.g., when two sets are provided, they are symmetrically arranged along the spiral support tube; when three sets are provided, they are arranged in a triangularly symmetrical arrangement along the spiral support tube). The rotary encoders 8 are controlled to move radially in contact with the spiral support tube, and the rotation of the spiral support tube passively rotates the rotary encoders 8. Under contact measurement from the multiple sets of rotary encoders 8, a control system connected to the encoders performs data acquisition and processing. The control system records the pulse data from the multiple sets of encoders and uses a software algorithm to calculate the intermediate value to measure the travel length of the spiral support tube. Furthermore, because the rotary encoders 8 are symmetrically attached to the spiral support tube, they can provide horizontal guidance to the spiral support tube, reducing yaw and wobble caused by the movement of the spiral support tube, thereby ensuring subsequent precise cutting. It should be noted that one set can be a rotary encoder 8, while the other set is simply a roller.

[0025] Furthermore, at least one group of cutting discs 12 is provided on one side of the axial movement path of the spiral support tube and at a position staggered from the rotary encoder 8. The number of cutting discs 12 is the same as that of the rotary encoder 8, and the cutting discs 12 are prepared for cutting as the rotary encoder 8 approaches the spiral support tube. The cutting orientation of the cutting disc 12 is pre-adjusted so that the cutting disc 12 approaches the spiral support tube to reduce the cutting movement path of the cutting disc 12. A cutter 13 is provided on one side of the cutting disc 12. After the rotary encoder 8 measures the specified length of movement of the spiral support tube, the cutting disc 12 is controlled to move and rotate synchronously with the spiral support tube. While moving with the spiral support tube, the cutter 13 is gradually extended relative to the cutting disc 12 to cut the spiral support tube. It can realize non-stop fixed-point cutting of the spiral support tube and gradual cutting of the spiral support tube to reduce deformation and inclination of the cut caused by hard collision when the cutter 13 contacts the cutting disc 12.

[0026] In addition, a telescopic rod 17 is provided through the winding mold 3, and the telescopic rod 17 extends into the spiral support tube. An internal support column 18 is provided at one end of the telescopic rod 17. The internal support column 18 is staggered from the cutting path of the cutter 13 to provide internal support for the spiral support tube during cutting. When the spiral support tube is cut, the telescopic rod 17 is used to drive the internal support column 18 to move synchronously with the spiral support tube. It can also serve as a support platform for the spiral support tube when the cutter 13 contacts and cuts the spiral support tube, ensuring that the spiral support tube is not deformed when cut and improving the smoothness of the incision.

[0027] See also Figures 7 - 15, to achieve the synchronous movement of the rotary encoder 8 and the cutting disc 12 towards the spiral support tube, drive components are provided on both sides of the rotary encoder 8 and the cutting disc 12. The drive components are used to drive the synchronous movement of the rotary encoder 8 and the cutting disc 12 towards the spiral support tube. Among them, the drive components include a first housing 6 located between the welding component and the rotary encoder 8. The first housing 6 is provided with a first sliding table 22 along its circumference. The first sliding table 22 fixedly supports the rotary encoder 8. A second housing 9 is provided on one side of the cutting disc 12 away from the first housing 6. The second housing 9 is provided with a second sliding table 23 along its circumference. The second sliding table 23 supports the cutting disc 12 through a support seat 11, and a first drive shaft 14 is provided on one side of the first housing 6 and the second housing 9. When the spiral support tube moves out along the material guiding tube 41 provided in the middle of the first housing 6, driven by a second motor 26 provided at one end of the first drive shaft 14, the first drive shaft 14 is driven to rotate, driving the first sliding table 22 and the second sliding table 23 to move synchronously, so that the rotary encoder 8 and the cutting disc 12 synchronously approach the spiral support tube. Specifically: Please refer to Figure 9 、 Figures 11 - 13 , a first ring rail 24 is provided in the first housing 6. An outer ring of the first ring rail 24 is provided with a first external gear disc 29. One side of the first external gear disc 29 is engaged with a first gear 27. One side of the first gear 27 is engaged with a second gear 28 provided on the first drive shaft 14. An inner ring of the first ring rail 24 is provided with a first internal gear disc 30. One side of the first internal gear disc 30 is engaged with a third gear 31. One side of the third gear 31 is engaged with a seventh gear 43. The seventh gear 43 is provided on a first transmission shaft 42. The other end of the first transmission shaft 42 is provided with an eighth gear 44. The eighth gear 44 is engaged with a first rack 45 provided on the first sliding table 22. By controlling the second motor 26 to drive the first drive shaft 14 to rotate, the second gear 28 is driven to rotate synchronously. Using the meshing transmission between the second gear 28, the first gear 27, and the first external gear disc 29, the first ring rail 24 is driven to rotate. And while the first ring rail 24 is rotating, the first internal gear disc 30 is driven to rotate. Then, using the meshing transmission between the first internal gear disc 30, the third gear 31, and the seventh gear 43, the eighth gear 44 at the other end of the first transmission shaft 42 is driven to rotate. Using the meshing of the eighth gear 44 and the first rack 45, the rack meshing force is converted into a moving thrust to push the first sliding table 22 to move, and then to push the rotary encoder 8 to move radially along the spiral support tube, contact and be driven to rotate passively by the spiral support tube, and measure the moving length of the spiral support tube.

[0028] Please refer to Figures 9 - 10 、 Figures 14 - 15, a second ring track 25 is provided in the second housing 9. A second outer gear disk 34 is provided on the outer ring of the second ring track 25. A fourth gear 32 is engaged with one side of the second outer gear disk 34. A fifth gear 33 is engaged with one side of the fourth gear 32. A second inner gear disk 35 is provided on the inner ring of the second ring track 25. A sixth gear 36 is engaged with one side of the second inner gear disk 35. A ninth gear 46 is engaged with one side of the sixth gear 36. The ninth gear 46 is provided on the second transmission shaft 47. A tenth gear 48 is provided at the other end of the second transmission shaft 47. The tenth gear 48 is engaged with a second rack 49 provided on the second slide 23. While the second motor 26 drives the first drive shaft 14 to rotate, it synchronously drives the fifth gear 33 to rotate. By using the meshing transmission between the fifth gear 33, the fourth gear 32, and the second outer gear disk 34, the second ring track 25 is driven to rotate. While the second ring track 25 is rotating, the second inner gear disk 35 is driven to rotate. Then, by using the meshing transmission between the second inner gear disk 35, the sixth gear 36, and the ninth gear 46, the tenth gear 48 at the other end of the second transmission shaft 47 is driven to rotate. By using the meshing of the tenth gear 48 and the second rack 49, the rack meshing force is converted into a moving thrust to push the second slide 23 to move, and then push the cutting disk 12 to move radially along the spiral support tube, so that the cutting disk 12 is as close as possible to the spiral support tube, in order to reduce the cutting movement path of the cutting disk 12 for cutting off the spiral support tube subsequently.

[0029] Please refer to Figures 9 - 13 , Figures 16 - 17 , to realize the rotary cutting of the spiral support tube by the rotation of the cutting disk 12, the driving assembly is further used to drive the cutting disk 12 to rotate and cut off the spiral support tube after the moving length is measured. The driving assembly further includes a second drive shaft 15 provided on the central axes of the rotary encoder 8 and the support seat 11. The second drive shaft 15 is rotationally connected to the rotary encoder 8 through a bearing sleeve. The second drive shaft 15 is slidably connected to the cutting disk 12 through the support seat 11 (by passing the second drive shaft 15 through the rotary encoder 8 and arranging it between the first housing 6 and the second housing 9, so that the second drive shaft 15 has the ability to drive the cutting disk 12 to rotate and also has the function of supporting and guiding, enabling the cutting disk 12 to slide and rotate along the second drive shaft 15). After the spiral support tube moves a specified length, the second drive shaft 15 is used to drive the cutting disk 12 to rotate, and push the cutter 13 on one side of the cutting disk 12 to rotate to perform the cutting process on the spiral support tube. Specifically: Please refer to Figure 10 , Figures 16 - 17, a first pulley 37 is provided on the first slide table 22 away from the rotary encoder 8, a second pulley 40 is provided on the first slide table 22 close to the rotary encoder 8, and the second pulley 40 is fixedly connected to the second drive shaft 15. There is a transmission belt 38 between the second pulley 40 and the first pulley 37 (and a tensioning pulley 39 is additionally provided to maintain the wrap angle drivability of the transmission belt 38 with the two groups of pulleys). By providing a first motor 7 on the first slide table 22 to drive the first pulley 37, the first motor 7 drives the first pulley 37 to rotate, drives the combination of the first pulley 37, the transmission belt 38, and the second pulley 40 to rotate, and then drives the second drive shaft 15 to rotate, pushing the cutting disc 12 on the support seat 11 to rotate.

[0030] It should be noted that by setting the number of the first slide tables 22 to be twice that of the rotary encoder 8, half of the number of the first slide tables 22 serves as the support platform for the first pulley 37, and the other half serves as the support platform for the second pulley 40 close to the rotary encoder 8. And for the first slide table 22 close to the rotary encoder 8 and the first slide table 22 away from the rotary encoder 8, the meshing drive between the first rack 45 and the corresponding eighth gear 44 on their respective slide tables moves in opposite directions (as shown in Figure 13 ), so that the adjacent first slide tables 22 move in positive and reverse directions. When the first slide table 22 drives the rotary encoder 8 to move, the first slide table 22 close to the rotary encoder 8 and the first slide table 22 away from the rotary encoder 8 move in positive and reverse directions, driving the second pulley 40 and the first pulley 37 to move synchronously in positive and reverse directions, so that the tension between the first pulley 37, the second pulley 40 and the transmission belt 38 is always maintained in a stable state, overcoming the situation of tension relaxation of the transmission belt 38 caused by movement, realizing the real-time moving tension between the first pulley 37, the transmission belt 38, and the second pulley 40, to ensure a stable transmission state between the first pulley 37, the transmission belt 38, and the second pulley 40, and serving as the drive source for driving the second drive shaft 15.

[0031] Please refer to Figure 3 , Figures 18 - 21 , to realize the fixed-point cutting of the spiral support pipe by the movement of the cutting disc 12, a sliding shaft 50 is provided in the middle of the cutting disc 12. The sliding shaft 50 is coaxial with the second drive shaft 15 (so that while the cutting disc 12 rotates along the second drive shaft 15, it can also slide along the central axis of the sliding shaft 50). The sliding shaft 50 is provided with an inclined plane guide rail 51 along its axial direction. A cutting tool 13 is provided on one side of the cutting disc 12. A pressure-bearing column 52 that fits with the inclined plane guide rail 51 is provided at the bottom of the cutting tool 13. When the cutting disc 12 moves and rotates synchronously with the spiral support pipe, it drives the pressure-bearing column 52 to move along the slope of the inclined plane guide rail 51, converts the slope movement thrust into a top support force, and pushes the cutting tool 13 to gradually extend relative to the cutting disc 12. Refer to the attached drawings of the specification Figure 21As shown in the change diagrams (a) and (b), it gradually contacts and cuts off the spiral support tube.

[0032] As a further solution of this embodiment, please refer to Figures 19 - 21 , a reset groove 55 is provided at one end of the inclined guide rail 51, a sinking groove 56 is provided at the other end of the inclined guide rail 51, and a yielding groove 54 is provided in the middle of the inclined guide rail 51 and a support arm 53 for supporting the pressure column 52 is provided at the bottom of the cutter 13 (the arm force of the support arm 53 is used to support the pressure column 52 so that the cutter 13 can be extended while sliding along the inclined guide rail 51, and then after the pressure column 52 moves to the top of the inclined guide rail 51, it sinks into the sinking groove 56. At this time, the support arm 53 synchronously moves down and slides into the yielding groove 54, always providing arm force support for the pressure column 52, so that the pressure column 52 has the ability to slide in the opposite direction along the bottom of the inclined guide rail 51), and the pressure column 52 moves to the top of the inclined guide rail 51 and sinks into the sinking groove 56. Figure 21 As shown in the variation diagram (c), the bottom and top of the slope guide rail 51 are set as chamfered structures in advance, so that when the pressure column 52 moves in the reverse direction in the sunken groove 56, it slides into the bottom of the slope guide rail 51 along the chamfered structure of the top of the slope guide rail 51, so that the pressure column 52 moves in the reverse direction along the slope guide rail 51. Figure 21 As shown in the change diagram (d), when passing through the reset groove 55, the rounded structure along the bottom of the slope guide rail 51 slides out of the reset groove 55 and resets to the bottom of the slope guide rail 51, so that the cutter 13 is reset after cutting. Figure 21 As shown in the change diagram in (e).

[0033] Furthermore, a lifting guide rod 57 is provided in the cutting disc 12, and a spring 58 is sleeved on the lifting guide rod 57, and a lifting slide 59 is sleeved on the lifting guide rod 57, which is staggered from the spring 58. The lifting slide 59 supports the cutter 13 from the side, and when the pressure column 52 slides along the inclined guide rail 51, the cutter 13 is pushed out. At this time, the cutter 13 drives the lifting slide 59 to move upward and apply a compressive force to the spring 58, so that the spring 58 is compressed and stored. When the pressure column 52 slides to the top of the inclined guide rail 51, the compression force of the spring 58 is released, so that the pressure column 52 moves down into the sinking slot 56, and then When the cutter 13 moves in the opposite direction to reset, the pressure column 52 frictionally contacts the inclined guide rail 51. Under the action of the reverse thrust, the pressure column 52 continues to move downward and slides into the bottom of the inclined guide rail 51. At this time, the cutter 13 drives the lifting slide 59 to move downward and exerts a pulling force on the spring 58, so that the spring 58 stretches and accumulates force. When the pressure column 52 slides in the opposite direction along the bottom of the inclined guide rail 51 toward the reset groove 55, the elastic tension of the spring 58 contracts, causing the pressure column 52 to move up and be pulled out of the reset groove 55, and reset to the bottom position of the slope of the inclined guide rail 51, preparing for the next spiral support tube cutting.

[0034] Also, seeFigure 3 , a screw propulsion mechanism 20 is provided on the moving path of the spiral support pipe, and the support table 1 is used to fixedly support the screw propulsion mechanism 20. One end of the screw propulsion mechanism 20 is provided with a first arm 16 for providing the inner support column 18 to move with the spiral support pipe, and the other end of the screw propulsion mechanism 20 is provided with a second arm 19 for providing the cutter 13 to move with the spiral support pipe. When cutting the spiral support pipe, control the screw propulsion mechanism 20 to work, and it will expand and contract synchronously with the movement of the spiral support pipe. On the one hand, through the arm force transmission between the first arm 16 and the telescopic rod 17, push the inner support column 18 to move synchronously with the spiral support pipe, and use the inner support column 18 as the cutting surface platform for cutting the spiral support pipe. On the other hand, push the second housing 9 to move synchronously with the spiral support pipe through the second arm 19. Since the combination of the cutting disc 12 and the cutter 13 is arranged on the second sliding table 23 through the support seat 11, and the second sliding table 23 is arranged on the second housing 9, the cutting disc 12 is pushed to move synchronously with the spiral support pipe, and while moving, the cutter 13 is pushed out, and with the inner support column 18 as the cutting platform, a fixed-point cutting process is carried out on the moving spiral support pipe.

[0035] In addition to the above, both the first drive shaft 14 and the second drive shaft 15 are of a rhombic shaft structure. The first drive shaft 14 is fixedly connected to the second gear 28, and the first drive shaft 14 is slidably connected to the fifth gear 33. The second drive shaft 15 is rotatably connected to the rotary encoder 8, and the second drive shaft 15 is slidably connected to the cutting disc 12 through the support seat 11. By setting the first drive shaft 14 and the second drive shaft 15 as rhombic shaft structures, they are equipped with the ability of sliding rotation, so that while the first sliding table 22 and the second sliding table 23 have the ability to move synchronously, they also have relative sliding movement. Then, through the synchronous movement drive of the first sliding table 22 and the second sliding table 23, the rotary encoder 8 and the cutting disc 12 are synchronously moved closer to the spiral support pipe to reduce the setting of additional drives. At the same time, by moving the second sliding table 23 relative to the first sliding table 22, while the cutting disc 12 rotates with the second drive shaft 15, it also has the characteristic of sliding along the second drive shaft 15, and the cutter 13 is pushed out by itself to carry out a fixed-point cutting process on the moving spiral support pipe. On the other hand, the present invention also provides a method for welding and cutting a plastic spiral support pipe for a cable accessory, including the following steps: Step 1: The support strip material is introduced into the winding die 3 in a coiling and unwinding manner through the guiding and traction of the traction wheel. By using the winding die 3 to circularly wind the support strip material and the synchronous welding of the welding assembly, the support strip material is circularly welded into a spiral support pipe, and the spiral support pipe moves axially in a spiral propulsion manner; Step 2: When the spiral support pipe is advancing, drive the rotary encoder 8 and the cutting disc 12 to move synchronously, so that the rotary encoder 8 measures the length of the spiral support pipe, and the cutting disc 12 is moved closer to the spiral support pipe to pre-adjust the cutting position of the cutting disc 12; Step 3: When the rotary encoder 8 measures that the spiral support pipe reaches the specified length, control the inner support column 18 and the cutting disc 12 to extend forward synchronously with the spiral support pipe, gradually push out the cutter 13 through the inclined plane guide rail 51, and use the inner support column 18 as the cutting platform to cut the continuously moving spiral support pipe at a fixed point. After cutting, the spiral support pipe slides down along the discharge chute 10 for discharging. At the same time, control the inner support column 18 and the cutter 13 to reset to prepare for the next cutting of the spiral support pipe.

Claims

1. A plastic spiral support pipe welding and cutting device for cable accessories, characterized in that, include: A winding mold (3), the winding mold (3) being arranged on the machine head and used for winding the support strip material; A welding assembly is used to weld the support strip material cyclically wound on the winding mold (3), and cyclically weld the support strip material to form a spiral support tube, so that the spiral support tube is formed along its axial direction and moves along the axial direction in a spiral propulsion manner; A rotary encoder (8) is provided on the moving path of the spiral support tube, and at least one set of rotary encoders (8) is provided. The rotary encoder (8) contacts the spiral support tube and passively rotates to measure the moving length of the spiral support tube and apply a guide limit. A cutting disc (12) is provided on the moving path of the spiral support tube, staggered from the rotary encoder (8), and at least one set of the cutting discs (12) is provided. The cutting discs (12) move synchronously with the rotary encoder (8) and approach the spiral support tube. A cutter (13) is provided on one side of the end face of the cutting disc (12). The cutter (13) is used to extend itself after the spiral support tube moves to a specified length and cut off the spiral support tube.

2. The plastic spiral support pipe welding and cutting device for cable accessories according to claim 1, characterized in that, Also includes: A sliding shaft (50) is provided in the middle of the cutting disc (12), and the cutting disc (12) can slide on the sliding shaft (50). The sliding shaft (50) is provided with an inclined guide rail (51) along its axial direction; A pressure column (52) is provided at one end of the cutter (13) close to the sliding shaft (50). When the cutting disc (12) moves synchronously with the spiral support tube, the pressure column (52) moves along the inclined guide rail (51). The inclined guide rail (51) is used to push the cutter (13) to gradually extend relative to the cutting disc (12) and cut the spiral support tube.

3. A plastic spiral support tube welding and cutting device for cable accessories according to claim 2, characterized in that: The utility model further comprises a reset groove (55) provided at one end of the inclined guide rail (51) and a sinking groove (56) provided at the other end of the inclined guide rail (51). The pressure column (52) moves to the top of the inclined guide rail (51) and then sinks into the sinking groove (56), and moves in the opposite direction along the other side of the inclined guide rail (51). When passing through the reset groove (55), the pressure column moves upward and is pushed out to the bottom of the inclined guide rail (51), so that the cutter (13) is reset after cutting.

4. A plastic spiral support pipe welding and cutting device for cable accessories according to claim 2, characterized in that: Also includes: A spring (58), wherein the spring (58) is disposed in the cutting disc (12), and a lifting guide rod (57) is sleeved in the spring (58); The lifting slide (59) can be sleeved on the lifting guide rod (57) and fixedly connected to the cutter (13), so that the cutter (13) is subjected to the centripetal pressure of the cutting disc (12).

5. A plastic spiral support pipe welding and cutting device for cable accessories according to claim 2, characterized in that: It also includes a telescopic rod (17), which is assembled at the center of the winding mold (3); An inner support column (18) is provided at one end of the telescopic rod (17) away from the winding mold (3). The inner support column (18) is staggered from the cutter (13) and is used to provide support for the spiral support tube when the cutter (13) cuts the spiral support tube.

6. A plastic spiral support tube welding and cutting device for cable accessories according to claim 2, characterized in that: It further includes a screw propulsion mechanism (20). One end of the screw propulsion mechanism (20) controls the inner support column (18) to move together with the spiral support tube through the first support arm (16), and the other end of the screw propulsion mechanism (20) controls the cutter (13) to move together with the spiral support tube through the second support arm (19), so that the inner support column (18) and the cutter (13) move synchronously with the spiral support tube, forming a state of fixed-point inner support and cutting of the spiral support tube.

7. A plastic spiral support tube welding and cutting device for cable accessories according to claim 2, characterized in that, On both sides of the rotary encoder (8) and the cutting disc (12), there is a driving assembly for driving the synchronous movement of the rotary encoder (8) and the cutting disc (12) and driving the rotation of the cutting disc (12) after the movement. The driving assembly includes: A first housing (6). The first housing (6) is located between the welding assembly and the rotary encoder (8). The first housing (6) is provided with a first sliding table (22) along the circumferential direction. The first sliding table (22) fixedly supports the rotary encoder (8). The number of the first sliding tables (22) is twice that of the rotary encoder (8), and the first sliding table (22) close to the rotary encoder (8) and the first sliding table (22) far from the rotary encoder (8) move in opposite directions. A second housing (9). The second housing (9) is arranged on the side of the cutting disc (12) far from the first housing (6) away from the first housing (6). The second housing (9) is provided with a second sliding table (23) along its circumferential direction. The number of the second sliding tables (23) is the same as that of the cutting disc (12). A support seat (11) for supporting the cutting disc (12) is arranged on one side of the second sliding table (23). A first driving shaft (14). The first driving shaft (14) is arranged on one side of the first housing (6) and the second housing (9) for driving the synchronous movement of the first sliding table (22) and the second sliding table (23), so that the rotary encoder (8) and the cutting disc (12) approach the spiral support tube synchronously.

8. A plastic spiral support tube welding and cutting device for cable accessories according to claim 7, characterized in that, The driving assembly further includes: A second driving shaft (15). The second driving shaft (15) is arranged on the central axis of the rotary encoder (8) and the support seat (11). Among them, the second driving shaft (15) is rotatably connected to the rotary encoder (8) through a bearing sleeve, the second driving shaft (15) is slidably connected to the cutting disc (12) through the support seat (11), and the second driving shaft (15) is coaxial with the sliding shaft (50). A first pulley (37). The first pulley (37) is arranged on the first sliding table (22) far from the rotary encoder (8). A second pulley (40) is provided on a first sliding table (22) near the rotary encoder (8), and the second pulley (40) is fixedly connected to a second drive shaft (15). A transmission belt (38) is provided between the second pulley (40) and a first pulley (37). When the first sliding table (22) drives the rotary encoder (8) to move, the first sliding table (22) near the rotary encoder (8) and the first sliding table (22) away from the rotary encoder (8) move in forward and reverse directions, driving the second pulley (40) and the first pulley (37) to move in forward and reverse directions synchronously, compensating for the slack between the two sets of pulleys and the transmission belt (38) caused by moving the rotary encoder (8), and always maintaining the tension of the two sets of pulleys and the transmission belt (38).

9. A plastic spiral support pipe welding and cutting device for cable accessories according to claim 7, characterized in that: Both the first drive shaft (14) and the second drive shaft (15) are in a rhombic shaft structure, enabling the cutting disc (12) to have the ability to move coaxially with the rotary encoder (8) towards the spiral support tube and move and rotate relative to the rotary encoder (8).

10. A method for welding and cutting a plastic spiral support tube for a cable accessory, applicable to the plastic spiral support tube welding and cutting device for a cable accessory according to any one of claims 1-9, characterized in that, It includes the following steps: Step 1: The support bar material is introduced into the winding die (3) in a coiling and unwinding manner after being guided and pulled by a traction wheel. The support bar material is circularly welded and formed into a spiral support tube by the circular winding of the winding die (3) and the synchronous welding of a welding assembly, and the spiral support tube moves axially in a spiral advancing manner; Step 2: When the spiral support tube advances, the rotary encoder (8) and the cutting disc (12) are driven to move synchronously, enabling the rotary encoder (8) to measure the length of the spiral support tube and enabling the cutting disc (12) to approach the spiral support tube to pre-adjust the cutting position of the cutting disc (12); Step 3: When the rotary encoder (8) measures that the spiral support tube reaches a specified length, the inner support column (18) and the cutting disc (12) are controlled to extend forward synchronously with the spiral support tube. The cutter (13) is gradually pushed out through an inclined plane guide rail (51), and the inner support column (18) is used as a cutting platform to cut the continuously moving spiral support tube at a fixed point. After cutting, the spiral support tube slides and unloads along a discharge chute (10). At the same time, the inner support column (18) and the cutter (13) are controlled to reset to prepare for the next cutting of the spiral support tube.

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