A plastic spiral support tube welding and cutting device for cable accessories and method thereof

Abstract

The present invention discloses a device and method for welding and cutting a plastic spiral support tube for cable accessories, and relates to the technical field of cable hose production. The device comprises a welding assembly, which shapes and rotates the spiral support tube along its axial direction. At least one set of rotary encoders is provided on one side of the axial movement path of the spiral support tube, and a cutting disk is provided. The axial movement path of the spiral support tube is staggered with the rotary encoders, and the same number of cutting disks as the rotary encoders are provided. A cutter is provided on one side of the cutting disk. During the continuous production and forming process of the spiral support tube, the rotary encoder is fitted with the spiral support tube to generate passive rotation, and the moving length of the spiral support tube is measured. At the same time, the cutting disk approaches the spiral support tube to prepare for cutting the spiral support tube. The cutting disk is then controlled to move and rotate synchronously with the spiral support tube, and the cutter is pushed out during the synchronous movement to cut the spiral support tube.

Description

Technical Field

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

[0002] Plastic spiral pipe is a common type of pipe. Compared with traditional straight pipe, spiral pipe has better flexibility and pressure resistance. Due to its special structure, spiral pipe is widely used in many fields. For example, in power engineering, spiral pipe is used to make cable protective cover. Due to the small bending radius of spiral pipe, it can better adapt to the direction of cable line, reduce cable bending and friction, and extend the service life of cable. Cable plastic spiral pipe is usually produced by extrusion molding process.

[0003] For example, Chinese patent publication number CN114932699B discloses a hose production device and process. During the hose manufacturing process, when the hose is produced to a certain length, the driving body is controlled to send the cutting tool of the pipe segment cutting device to the designated cutting surface position of the hose, so that the cutting tool rotates along the cutting surface of the hose to cut the hose, so that the cut hose can be moved away from the current processing station for the next process.

[0004] However, during the production process of existing plastic hoses, the cutting device usually only has a single fixed-point cutting capability. The hose must remain stationary before the cutting process can be performed on the cut surface of the hose. This results in poor stability in the continuous molding of the hose and also causes slow continuous production efficiency of the hose. Summary of the Invention

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

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device and method for welding and cutting a plastic spiral support tube 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] Furthermore, a driving assembly is provided on both sides of the rotary encoder and the cutting disk for driving the rotary encoder and the cutting disk to move synchronously and driving the cutting disk to rotate after movement; the driving assembly includes: a first housing, the first housing is located between the welding assembly and the rotary encoder, the first housing is provided with a first slide along the circumference, the first slide fixedly supports the rotary encoder, the number of the first slide is twice that of the rotary encoder, and the first slide close to the rotary encoder and the first slide away from the rotary encoder move in opposite directions; a second housing, the second housing is provided away from the first housing and is arranged on the side of the cutting disk away from the first housing, the second housing is provided with a second slide along its circumference, the number of the second slide is the same as the number of the cutting disk, and a support seat for supporting the cutting disk is provided on one side of the second slide; a first driving shaft, the first driving shaft is provided on one side of the first housing and the second housing, for driving the first slide and the second slide to move synchronously, so that the rotary encoder and the cutting disk are synchronously close to the spiral support tube.

[0014] Furthermore, the drive assembly also includes: a second drive shaft, the second drive shaft is arranged on the central axis of the rotary encoder and the support seat, wherein the second drive shaft is rotatably connected to the rotary encoder through a bearing sleeve, the second drive shaft is slidably connected to the cutting disk through the support seat, and the second drive shaft is coaxial with the sliding shaft; a first pulley, the first pulley is arranged on the first slide away from the rotary encoder; a second pulley, the second pulley is arranged on the first slide close to the rotary encoder, and the second pulley is fixedly connected to the second drive shaft, and a transmission belt is provided between the second pulley and the first pulley, and when the first slide drives the rotary encoder to move, the first slide close to the rotary encoder and the first slide away from the rotary encoder move forward and reverse, driving the second pulley and the first pulley to move synchronously forward and reverse, 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] Furthermore, the first drive shaft and the second drive shaft are both prismatic shaft structures, so that the cutting disc has the ability to move coaxially with the rotary encoder toward the spiral support tube and move 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, comprising the following steps:

[0017] Step 1: The support bar material is rolled up and guided by a traction wheel, and then introduced into a winding die. The winding die is used to cyclically wind the support bar material and simultaneously weld the welding assembly to form a spiral support tube. The spiral support tube moves axially in a spiral propulsion manner.

[0018] Step 2: When the spiral support tube is advanced, the rotary encoder is driven to move synchronously with the cutting disc, so that the rotary encoder measures the length of the spiral support tube, and the cutting disc is brought close to the spiral support tube to pre-adjust the cutting position of the cutting disc;

[0019] Step 3: When the rotary encoder measures the spiral support tube to reach the specified length, the inner support column and the cutting disc are controlled to extend forward synchronously with the spiral support tube. The cutter is gradually pushed out through the inclined guide rail, and the inner support column is used as the cutting platform to cut the continuously moving spiral support tube at a fixed point. After cutting, the spiral support tube slides along the discharge chute to be discharged. At the same time, the inner support column and the cutter are controlled to reset to prepare for the next cutting of the spiral support tube.

[0020] The present invention has the following beneficial effects:

[0021] (1) The cable accessory uses a plastic spiral support tube welding and cutting device. During the continuous production and molding process of the spiral support tube, the rotary encoder and the cutting disc are controlled to move synchronously toward the spiral support tube. The rotary encoder and the spiral support tube are fitted to generate passive rotation, and the moving length of the spiral support tube is measured. At the same time, the cutting disc is moved close 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, the cutting disc is controlled to move and rotate synchronously with the spiral support tube, and the cutter is pushed out during the synchronous movement to cut the spiral support tube, thereby realizing the non-stop production and cutting process of the spiral support tube, improving production efficiency, and enhancing production stability.

[0022] (2) The cable accessories use a plastic spiral support tube welding and cutting device, which moves synchronously with the cutting disc toward the spiral support tube through a rotary encoder. On the one hand, the rotary encoder can measure the rotation of the spiral support tube while also having the guiding and limiting capabilities to reduce the deflection generated during the movement of the spiral support tube. It can also pre-adjust the cutting direction of the cutting disc so that the cutting disc is as close to the spiral support tube as possible, thereby reducing the cutting movement path of the cutting disc and improving the cutting efficiency. On the other hand, it has flexible control characteristics and can adapt to the movement measurement and synchronous cutting work of spiral support tubes of different sizes.

[0023] (3) The cable accessories use a plastic spiral support tube welding cutting device, which pushes the cutting disc and the inner support column to move synchronously with the movement of the spiral support tube through the screw propulsion mechanism. During the movement of the cutting disc, the cutter is gradually pushed out by itself, and the inner support column is used as the cutting platform to perform fixed-point cutting on the spiral support tube in continuous movement, so that the spiral support tube can be cut at a fixed point without stopping the machine during continuous production and molding, thereby improving the production efficiency of the spiral support tube.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 3 Schematic diagram of the parallel structure of the cutting disc and the inner support column in the present invention;

[0028] Figure 4 Schematic diagram of the structure of the welding assembly in the present invention;

[0029] Figure 5 A partial cross-sectional view of a welding assembly in the present invention;

[0030] Figure 6 It is a schematic diagram of feeding in the present invention;

[0031] Figure 7 This is a first assembly diagram of the rotary encoder and the cutting disc in the present invention;

[0032] Figure 8 This is a second assembly diagram of the rotary encoder and the cutting disc in the present invention;

[0033] Figure 9 This is a schematic diagram of a first drive of the rotary encoder and the cutting disc in the present invention;

[0034] Figure 10 This is a schematic diagram of a second drive of the rotary encoder and the cutting disc in the present invention;

[0035] Figure 11 Schematic diagram of the assembly of the rotary encoder in the present invention;

[0036] Figure 12 Schematic diagram of the first movement drive of the rotary encoder in the present invention;

[0037] Figure 13 Schematic diagram of the second movement drive of the rotary encoder in the present invention;

[0038] Figure 14 This is a schematic diagram of the first movement drive of the cutting disc in the present invention;

[0039] Figure 15 This is a schematic diagram of the second movement drive of the cutting disc in the present invention;

[0040] Figure 16 Schematic diagram of the rotation drive of the cutting disc in the present invention;

[0041] Figure 17 A plan view of the rotary drive of the cutting disc of the present invention;

[0042] Figure 18 Schematic diagram of the first drive of the cutter in the present invention;

[0043] Figure 19 Schematic diagram of the second drive of the cutter in the present invention;

[0044] Figure 20 Schematic diagram of the force acting on the cutter in the present invention;

[0045] Figure 21 This is a cutting state change diagram of the present invention, where (a), (b), (c), (d), and (e) are respectively the first cutting state diagram, the second cutting state diagram, the cutting reset starting state diagram, the cutting reset path state diagram, and the cutting reset end state diagram of the cutter in the present invention.

[0046] In the figure, 1, support platform; 2, reduction drive motor; 3, winding mold; 4, housing; 5, ultrasonic welding head; 6, first housing; 7, first motor; 8, rotary encoder; 9, second housing; 10, discharge chute; 11, support base; 12, cutting disc; 13, cutter; 14, first drive shaft; 15, second drive shaft; 16, first support arm; 17, telescopic rod; 18, inner support column; 19, second support arm; 20, screw propulsion mechanism; 21, screw lifting guide rail; 22, first slide; 23, second slide; 24, first ring rail; 25, second ring rail; 26, second motor; 27, first gear; 28, second gear; 29, first outer gear disc; 30, first Inner toothed disc; 31. third gear; 32. fourth gear; 33. fifth gear; 34. second outer toothed disc; 35. second inner toothed disc; 36. sixth gear; 37. first pulley; 38. transmission belt; 39. tensioning pulley; 40. second pulley; 41. material guide tube; 42. first transmission shaft; 43. seventh gear; 44. eighth gear; 45. first rack; 46. ninth gear; 47. second transmission shaft; 48. tenth gear; 49. second rack; 50. sliding shaft; 51. inclined guide rail; 52. bearing column; 53. support arm; 54. clearance groove; 55. reset groove; 56. sinking groove; 57. lifting guide rod; 58. spring; 59. lifting slide. DETAILED DESCRIPTION

[0047] See also Figures 1-21 The embodiment of the present invention provides a technical solution: a device and method for welding and cutting a plastic spiral support tube for cable accessories. On the one hand, the present invention provides a device and method for welding and cutting a plastic spiral support tube for cable accessories. Figures 1-6The plastic spiral support tube welding and cutting device for cable accessories includes a winding mold 3, which is arranged on the head of the welding assembly, wherein the welding assembly includes a reduction drive motor 2, the head of the reduction drive motor 2 supports the winding mold 3, and a shell 4 is provided above the reduction drive motor 2, the interior of the shell 4 is provided with a screw lifting guide rail 21, and an ultrasonic welding head 5 is provided on the lifting slide of the screw lifting guide rail 21. When the support strip material is guided and pulled into the winding mold 3 by the traction wheel, the screw lifting guide rail 21 is controlled to drive the ultrasonic welding head 5 to move downward, so that the ultrasonic welding head 5 moves down to the winding mold 3 and is pressed with the support strip material wound on the outer surface of the winding mold 3, and then the reduction drive motor 2 is controlled to drive the core shaft of the winding mold 3 to rotate, continuously winding the support strip material, and using the ultrasonic welding head 5 to weld the continuously wound support strip material, so that the support strip material is cyclically welded to form a spiral support tube, and moves in a spiral manner along its axial direction.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] See also Figure 7-Figure 15 In order to realize the synchronous movement of the rotary encoder 8 and the cutting disk 12 toward the spiral support tube, a driving assembly is provided on both sides of the rotary encoder 8 and the cutting disk 12. The driving assembly is used to drive the rotary encoder 8 and the cutting disk 12 to move synchronously toward the spiral support tube, wherein the driving assembly includes a first housing 6 located between the welding assembly and the rotary encoder 8, the first housing 6 is provided with a first slide 22 along its circumference, the first slide 22 fixedly supports the rotary encoder 8, and a second housing 9 is provided on one side of the cutting disk 12 away from the first housing 6. The housing 9 is provided with a second slide 23 along its circumference. The second slide 23 supports the cutting disc 12 through the support seat 11, and the 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 guide tube 41 provided in the middle of the first housing 6, the first drive shaft 14 is driven by the second motor 26 provided at one end of the first drive shaft 14 to rotate, driving the first slide 22 and the second slide 23 to move synchronously, so that the rotary encoder 8 and the cutting disc 12 are synchronously close to the spiral support tube. For details: please refer to Figure 9 、 Figure 11-13A first ring rail 24 is provided in the first housing 6. A first outer gear disc 29 is provided on the outer ring of the first ring rail 24. A first gear 27 is meshed on one side of the first outer gear disc 29. One side of the first gear 27 is meshed with a second gear 28 provided on the first drive shaft 14. A first inner gear disc 30 is provided on the inner ring of the first ring rail 24. A third gear 31 is meshed on one side of the first inner gear disc 30. A seventh gear 43 is meshed on one side of the third gear 31. The seventh gear 43 is provided on the first transmission shaft 42. An eighth gear 44 is provided on the other end of the first transmission shaft 42. The eighth gear 44 is meshed with a first rack 45 provided on the first slide 22. The first drive shaft 14 is driven to rotate by controlling the second motor 26. The second gear 28 is driven to rotate synchronously, and the meshing transmission among the second gear 28, the first gear 27, and the first outer gear disc 29 is used to drive the first ring rail 24 to rotate. While the first ring rail 24 rotates, the first inner gear disc 30 is driven to rotate. Then, the meshing transmission among the first inner gear disc 30, the third gear 31, and the seventh gear 43 is used to drive the eighth gear 44 at the other end of the first transmission shaft 42 to rotate. The meshing force of the rack is converted into a moving thrust by utilizing the meshing of the eighth gear 44 and the first rack 45, pushing the first slide 22 to move, and then pushing the rotary encoder 8 to move along the radial direction of the spiral support tube, contacting with the spiral support tube and passively rotating, thereby measuring the moving length of the spiral support tube.

[0052] See also Figure 9-10 、 Figure 14-15 A second ring rail 25 is provided in the second housing 9, and a second outer gear disc 34 is provided on the outer ring of the second ring rail 25. A fourth gear 32 is meshed on one side of the second outer gear disc 34, and a fifth gear 33 is meshed on one side of the fourth gear 32. A second inner gear disc 35 is provided on the inner ring of the second ring rail 25, and a sixth gear 36 is meshed on one side of the second inner gear disc 35. A ninth gear 46 is meshed on one side of the sixth gear 36. The ninth gear 46 is provided on the second transmission shaft 47, and a tenth gear 48 is provided on the other end of the second transmission shaft 47. The tenth gear 48 is meshed with a second rack 49 provided on the second slide 23. When the second motor 26 drives the first drive shaft 14 to rotate, it also drives the fifth gear 33 to rotate synchronously. The meshing transmission among the fifth gear 33, the fourth gear 32 and the second outer gear disc 34 is used to drive the second ring rail 25 to rotate, and while the second ring rail 25 rotates, the second inner gear disc 35 is driven to rotate, and then the meshing transmission among the second inner gear disc 35, the sixth gear 36 and the ninth gear 46 is used to drive the tenth gear 48 at the other end of the second transmission shaft 47 to rotate, and the meshing force of the rack 48 is converted into a moving thrust by using the meshing of the tenth gear 48 and the second rack 49, which pushes the second slide 23 to move, and then pushes the cutting disk 12 to move along the radial direction of the spiral support tube, so that the cutting disk 12 is as close to the spiral support tube as possible, so as to reduce the cutting movement path of the subsequent cutting disk 12 to cut off the spiral support tube.

[0053] See also Figures 9-13 、 Figure 16-17 In order to realize the rotation of the cutting disc 12 to cut the spiral support tube, the driving assembly is also used to drive the cutting disc 12 to rotate and cut the spiral support tube after the moving length is measured. The driving assembly also includes a second driving shaft 15 provided on the central axis of the rotary encoder 8 and the support seat 11. The second driving shaft 15 is rotatably connected to the rotary encoder 8 through a bearing sleeve, and the second driving shaft 15 is slidably connected to the cutting disc 12 through the support seat 11 (by passing the second driving shaft 15 through the rotary encoder 8 and being arranged between the first housing 6 and the second housing 9, the second driving shaft 15 has the ability to drive the cutting disc 12 to rotate while also having the support and guiding ability, so that the cutting disc 12 can slide and rotate along the second driving shaft 15). After the spiral support tube moves a specified length, the cutting disc 12 is driven to rotate by the second driving shaft 15, which pushes the cutter 13 on one side of the cutting disc 12 to rotate, thereby cutting the spiral support tube. For details, please refer to Figure 10 、 Figure 16-17 A first pulley 37 is provided on the first slide 22 away from the rotary encoder 8, and a second pulley 40 is provided on the first slide 22 close to the rotary encoder 8, and the second pulley 40 is fixedly connected to the second drive shaft 15, and a transmission belt 38 is provided between the second pulley 40 and the first pulley 37 (and a tensioning pulley 39 is auxiliaryly provided to maintain the transmission property of the transmission belt 38 and the two sets of pulleys). A first motor 7 that drives the first pulley 37 is provided on the first slide 22, and the first motor 7 is used to drive the first pulley 37 to rotate, thereby driving the combination of the first pulley 37, the transmission belt 38 and the second pulley 40 to rotate, and then driving the second drive shaft 15 to rotate, thereby driving the cutting disk 12 on the support seat 11 to rotate.

[0054] It should be noted that, by making the number of the first slides 22 twice that of the rotary encoder 8, half of the first slides 22 serve as the support platform for the first pulley 37, and the other half serve as the support platform for the second pulley 40 close to the rotary encoder 8, and the first slide 22 close to the rotary encoder 8 and the first slide 22 far from the rotary encoder 8, the first rack 45 on each slide is meshed with the corresponding eighth gear 44 and driven to move in opposite directions (combined with Figure 13As shown in the figure, the adjacent first slides 22 move in the forward and reverse directions. When the first slide 22 drives the rotary encoder 8 to move, the first slide 22 close to the rotary encoder 8 and the first slide 22 away from the rotary encoder 8 move in the forward and reverse directions, driving the second pulley 40 and the first pulley 37 to move synchronously in the forward 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 where the transmission belt 38 becomes loose due to movement, and realizing real-time movement tensioning between the first pulley 37, the transmission belt 38 and the second pulley 40, so as to ensure a stable transmission state between the first pulley 37, the transmission belt 38 and the second pulley 40, which serve as the driving source for driving the second drive shaft 15.

[0055] See also Figure 3 、 Figures 18-21 In order to realize the movement of the cutting disc 12 to cut the spiral support tube at a fixed point, 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 the cutting disc 12 can rotate along the second drive shaft 15 while maintaining sliding movement along the central axis of the sliding shaft 50). The sliding shaft 50 is provided with an inclined guide rail 51 along its axial direction. A cutter 13 is provided on one side of the cutting disc 12. A pressure column 52 is provided at the bottom of the cutter 13 that fits with the inclined guide rail 51. When the cutting disc 12 moves and rotates synchronously with the spiral support tube, the pressure column 52 is driven to move along the slope of the inclined guide rail 51, converting the thrust of the slope movement into a supporting force, pushing the cutter 13 to gradually extend relative to the cutting disc 12. Figure 21 As shown in the change diagrams (a) and (b), it gradually contacts and cuts off the spiral support tube.

[0056] 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 21As 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).

[0057] 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.

[0058] Also, see Figure 3A screw propulsion mechanism 20 is provided in the moving path of the spiral support tube, and the support platform 1 is used to fix the screw propulsion mechanism 20. One end of the screw propulsion mechanism 20 is provided with a first arm 16 for providing an inner support column 18 to move with the spiral support tube, and the other end of the screw propulsion mechanism 20 is provided with a second arm 19 for providing a cutter 13 to move with the spiral support tube. When the spiral support tube is cut, the screw propulsion mechanism 20 is controlled to work and synchronously extend and retract with the movement of the spiral support tube. On the one hand, the arm force transmission of the first arm 16 and the telescopic rod 17 is used to push the inner support column 18 to move with the spiral support tube. The support column 18 moves synchronously with the spiral support tube, and the inner support column 18 is used as a cutting platform for cutting the spiral support tube. On the other hand, the second support arm 19 pushes the second housing 9 to move synchronously with the spiral support tube. Since the combination of the cutting disk 12 and the cutter 13 is arranged on the second slide 23 through the support seat 11, and the second slide 23 is arranged on the second housing 9, the cutting disk 12 is pushed to move synchronously with the spiral support tube, and while moving, the cutter 13 is pushed out, and the inner support column 18 is used as the cutting platform to perform a fixed-point cutting process on the moving spiral support tube.

[0059] In addition to the above, the first drive shaft 14 and the second drive shaft 15 are both prismatic shaft structures. The first drive shaft 14 is fixedly connected to the second gear 28, and the first drive shaft 14 is slidingly connected to the fifth gear 33. The second drive shaft 15 is rotationally connected to the rotary encoder 8, and the second drive shaft 15 is slidingly connected to the cutting disk 12 through the support seat 11. By setting the first drive shaft 14 and the second drive shaft 15 as prismatic shaft structures, they have the ability to slide and rotate, so that the first slide 22 and the second slide 23 have the ability to move synchronously while also having the ability to move and slide relative to each other. Then, through the synchronous movement drive of the first slide 22 and the second slide 23, the rotary encoder 8 and the cutting disk 12 are synchronously moved toward the spiral support tube to reduce the setting of additional drives. At the same time, by moving and sliding the second slide 23 relative to the first slide 22, the cutting disk 12 rotates with the second drive shaft 15 while also having the characteristic of sliding along the second drive shaft 15, and the cutter 13 is pushed out to perform a fixed-point cutting process on the moving spiral support tube. On the other hand, the present invention also provides a method for welding and cutting a plastic spiral support tube for cable accessories, comprising the following steps:

[0060] Step 1: The support bar material is rolled up and guided by the traction wheel and then introduced into the winding die 3. The winding die 3 is used to cyclically wind the support bar material and simultaneously weld the welding assembly to form a spiral support tube. The spiral support tube is moved axially in a spiral propulsion manner.

[0061] Step 2: When the spiral support tube is advanced, the rotary encoder 8 is driven to move synchronously with the cutting disc 12, so that the rotary encoder 8 measures the length of the spiral support tube, and the cutting disc 12 is brought close to the spiral support tube to pre-adjust the cutting position of the cutting disc 12;

[0062] Step 3: When the rotary encoder 8 measures the spiral support tube to reach the specified length, the inner support column 18 and the cutting disc 12 are controlled to extend forward synchronously with the spiral support tube, and the cutter 13 is gradually pushed out through the inclined guide rail 51. The inner support column 18 is used as the cutting platform to cut the continuously moving spiral support tube at a fixed point. After cutting, the spiral support tube slides along the discharge chute 10 to be discharged. 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.

Claims

1. A welding and cutting device for a plastic spiral support tube 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 a 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 the spiral support tube. 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. 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.

2. The device for welding and cutting a plastic spiral support tube for cable accessories according to claim 1, 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).

3. The device for welding and cutting a plastic spiral support tube 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.

4. A welding and cutting device for a plastic spiral support tube for cable accessories according to claim 3, characterized in that: The invention also includes a screw propulsion mechanism (20), one end of which controls the inner support column (18) to move along with the spiral support tube through the first support arm (16), and the other end of which controls the cutter (13) to move along 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, thereby forming a state in which the spiral support tube is fixedly supported and cut.

5. A welding and cutting device for a plastic spiral support tube for cable accessories according to claim 2, characterized in that: Drive components are provided on both sides of the rotary encoder (8) and the cutting disc (12) for driving the rotary encoder (8) and the cutting disc (12) to move synchronously and for driving the cutting disc (12) to rotate after the movement; The drive assembly includes: A first housing (6), wherein the first housing (6) is located between the welding assembly and the rotary encoder (8), and the first housing (6) is provided with a first slide (22) along a circumferential direction, wherein the first slide (22) fixedly supports the rotary encoder (8), the number of the first slides (22) is twice the number of the rotary encoders (8), and the first slide (22) close to the rotary encoder (8) moves in opposite directions to the first slide (22) away from the rotary encoder (8); a second housing (9), the second housing (9) being located away from the first housing (6) and on a side of the cutting disc (12) away from the first housing (6); the second housing (9) being provided with second slides (23) along its circumference; the number of the second slides (23) being the same as the number of the cutting discs (12); and a support seat (11) for supporting the cutting disc (12) being provided on one side of the second slides (23); A first drive shaft (14) is provided on one side of the first housing (6) and the second housing (9) and is used to drive the first slide (22) and the second slide (23) to move synchronously, so that the rotary encoder (8) and the cutting disc (12) are synchronously moved toward the spiral support tube.

6. A welding and cutting device for a plastic spiral support tube for cable accessories according to claim 5, characterized in that: The drive assembly further includes: a second drive shaft (15), the second drive shaft (15) being arranged on a central axis of the rotary encoder (8) and the support seat (11), wherein the second drive shaft (15) is rotationally connected to the rotary encoder (8) via a bearing sleeve, the second drive shaft (15) is slidingly connected to the cutting disc (12) via the support seat (11), and the second drive shaft (15) is coaxial with the sliding shaft (50); a first pulley (37), the first pulley (37) being arranged on a first slide (22) away from the rotary encoder (8); A second pulley (40) is provided on a first slide (22) close to the rotary encoder (8), and the second pulley (40) is fixedly connected to the second drive shaft (15). A transmission belt (38) is provided between the second pulley (40) and the first pulley (37). When the first slide (22) drives the rotary encoder (8) to move, the first slide (22) close to the rotary encoder (8) and the first slide (22) away from the rotary encoder (8) move in a forward and reverse direction, driving the second pulley (40) and the first pulley (37) to move in a forward and reverse direction synchronously, compensating for the slack between the two sets of pulleys and the transmission belt (38) caused by the movement of the rotary encoder (8), and always maintaining the tension between the two sets of pulleys and the transmission belt (38).

7. The device for welding and cutting a plastic spiral support tube for cable accessories according to claim 6, characterized in that: The first drive shaft (14) and the second drive shaft (15) are both prismatic shaft structures, so that the cutting disc (12) has the ability to move coaxially with the rotary encoder (8) toward the spiral support tube and move and rotate relative to the rotary encoder (8).

8. A method for welding and cutting a plastic spiral support tube for cable accessories, applicable to the device for welding and cutting a plastic spiral support tube for cable accessories according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: The support bar material is wound and pulled by the traction wheel, and then introduced into the winding mold (3). The winding mold (3) is used to cyclically wind the support bar material and synchronously weld the welding components, so that the support bar material is cyclically welded to form a spiral support tube, and the spiral support tube moves axially in a spiral propulsion manner; Step 2: When the spiral support tube is advanced, the rotary encoder (8) and the cutting disc (12) are driven to move synchronously, so that the rotary encoder (8) measures the length of the spiral support tube, and the cutting disc (12) is brought close to the spiral support tube to pre-adjust the cutting position of the cutting disc (12); Step 3: When the rotary encoder (8) measures the spiral support tube to a specified length, the inner support column (18) and the cutting disc (12) are controlled to extend forward synchronously with the spiral support tube, and the cutter (13) is gradually pushed out through the inclined guide rail (51). 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 down the discharge chute (10) for discharge. 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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