Rotary traction guillotine

Abstract

The application relates to the field of pipe processing, in particular to a rotary traction cutting-off machine which comprises a traction torsion mechanism and a cutting-off mechanism; the traction torsion mechanism comprises upper traction assemblies and lower traction assemblies which are arranged in an up-and-down staggered mode, a gap adjusting mechanism and an angle adjusting mechanism; the upper traction assemblies and the lower traction assemblies are arranged in an up-and-down staggered mode along the radial direction of the pipe, the traction directions of the two are cross-symmetrical to form a torsion included angle, and a traction gap for the pipe to pass through is enclosed between the two traction conveying surfaces; the gap adjusting mechanism drives any one traction assembly to relatively move along the radial direction of the pipe to adjust the opening and closing size of the traction gap; the angle adjusting mechanism drives the upper traction assemblies and the lower traction assemblies to synchronously deflect around the pipe conveying axis to adjust the angle value of the torsion included angle; and the cutting-off mechanism is used for cutting off the pipe with a fixed length. The rotary traction cutting-off machine meets the high-precision processing requirement of the spiral plastic pipe with different pitches, and avoids the problem of plastic deformation of the spiral plastic pipe.

Description

Technical Field

[0001] This application relates to the field of pipe processing, and in particular to a rotary traction cutting machine. Background Technology

[0002] Plastic pipes are widely used in many fields such as construction, chemical industry, and agriculture. The entire plastic pipe processing involves melting raw materials, extruding them through a mold, cooling and setting them, and finally slitting them to form the pipes. With changing market demands, spiral plastic pipes have emerged. Their processing is more complex than that of ordinary plastic pipes, requiring twisting and shaping before the pipe has fully cooled and solidified, followed by slitting to form a spiral. This application relates to the field of pipe processing, and more particularly to a rotary traction cutting machine for pipes. The production of spiral plastic pipes has driven the continuous development of related processing equipment and technologies. These technological advancements have improved production efficiency and met the needs of different fields for spiral plastic pipes.

[0003] In existing spiral plastic pipe processing technology, conventional equipment includes a feeding and traction structure, a rotating structure, a cutting structure, and a discharging structure. The pipe extruded from the plastic pipe extruder is drawn into the rotating structure by the feeding and traction structure. The rotating structure performs a spiral operation on the pipe. The cutting structure, located at the discharge end of the rotating structure, is used to cut the plastic pipe. The cut pipe is then discharged from the discharging structure. These structures work together to complete the spiral cutting of the plastic pipe. This equipment combination achieves a certain level of processing capability for spiral plastic pipes.

[0004] However, existing spiral plastic pipe processing equipment has significant drawbacks. When the pipe rotates in the spiral structure, it requires the assistance of a traction structure for discharge. During rotation, the pipe is easily subjected to unnecessary axial tension or compression, and may also generate excessive torsional stress. For pipes with small diameters or thin walls, this can easily lead to plastic deformation before cutting, thus affecting the appearance and dimensions of the final product. Furthermore, this structure is difficult to adapt to the high-precision processing requirements of different thread pitches for spiral pipes. When processing plastic pipes with different thread pitches, the rotating structure requires separate adjustments and matching of the traction and rotation components, making the operation cumbersome. Summary of the Invention

[0005] To meet the high-precision processing requirements of spiral plastic tubes with different pitches and to avoid plastic deformation of the spiral plastic tubes, this application provides a rotary traction cutting machine.

[0006] A rotary traction cutting machine includes a frame and a traction torsion mechanism and a cutting mechanism arranged sequentially along the pipe conveying direction. The traction torsion mechanism includes an upper traction component and a lower traction component arranged alternately, a gap adjustment mechanism, and an angle adjustment mechanism. The upper traction component and the lower traction component are arranged alternately along the radial direction of the pipe. The traction conveying surfaces of the upper traction component and the lower traction component are opposite to and parallel to each other. Their traction directions are symmetrically intersecting to form a torsion angle, and a traction gap for the pipe to pass through is formed between the two traction conveying surfaces. The power output end of the gap adjustment mechanism is driven to either traction component, driving the corresponding traction component to move relative to each other along the radial direction of the pipe to adjust the opening and closing size of the traction gap. The power output end of the angle adjustment mechanism is driven to both the upper traction component and the lower traction component, driving them to rotate synchronously around the pipe conveying axis to adjust the angle value of the torsion angle. The cutting station of the cutting mechanism is coaxially connected to the pipe output end of the traction torsion mechanism for cutting pipes to a fixed length.

[0007] By adopting the above technical solution, the traction conveying surfaces of the upper and lower traction components are opposite and parallel, and their traction directions intersect symmetrically to form a torsional angle. This allows the pipe to twist during conveying, achieving the goal of twisting the pipe into a spiral shape while conveying it. This avoids unnecessary axial tension, compression, or excessive torsional stress on the pipe due to reliance on the traction structure for material output in existing equipment, effectively preventing plastic deformation of the pipe diameter and ensuring the appearance and pitch accuracy of the final product. The gap adjustment mechanism can drive the traction components to move radially relative to each other along the pipe to adjust the traction gap, adapting to the processing needs of pipes with different diameters and expanding the applicability of the equipment. The angle adjustment mechanism can drive the upper and lower traction components to rotate synchronously around the pipe conveying axis to adjust the torsional angle value, meeting the high-precision processing requirements of threaded pipes with different pitches. It is also easy to operate, eliminating the need to replace and match the traction and rotation components separately as required by existing equipment.

[0008] Preferably, the upper traction assembly includes a first mounting base, a first belt, a first driving roller, a first driven roller, and a first driving member. The first driving roller and the first driven roller are spaced apart and rotatably disposed on the first mounting base along the pipe conveying direction. The first belt is sleeved on the outer peripheral surfaces of the first driving roller and the first driven roller. The output end of the first driving member is fixedly connected to the first driving roller.

[0009] By adopting the above technical solution, the upper traction component structure can achieve stable traction and conveying of the pipe. The first driving component drives the first active roller to rotate, causing the first belt sleeved on the outer circumference of the first active roller and the first driven roller to rotate, which can effectively traction the pipe to be conveyed forward, providing a basis for subsequent twisting and cutting processes.

[0010] Preferably, the lower traction assembly includes a second mounting base, a second belt, a second driving roller, a second driven roller, and a second driving member. The second driving roller and the second driven roller are spaced apart and rotatably disposed on the second mounting base along the pipe conveying direction. The second belt is sleeved on the outer circumferential surface of the second driving roller and the second driven roller. The output end of the second driving member is fixedly connected to the second driving roller. The first driving roller and the second driving roller rotate in opposite directions.

[0011] By adopting the above technical solution, the upper and lower traction components work together to apply forces in opposite directions to the pipe, effectively achieving traction and torsion of the pipe.

[0012] Preferably, the gap adjustment mechanism includes a first adjustment drive, a lead screw, and a lead screw sleeve. The lead screw is fixedly connected to the output end of the first adjustment drive along the radial direction of the pipe and is driven to rotate around the axis. The lead screw sleeve is fixedly disposed on the frame and threadedly connected to the lead screw. The lead screw is fixedly connected to the first mounting base. The lead screw can rotate and move radially along the pipe.

[0013] By adopting the above technical solution, the first adjusting drive component of the gap adjusting mechanism drives the lead screw to rotate and drives the first mounting seat to move radially relative to the pipe, thereby adjusting the opening and closing size of the traction gap, which can adapt to the processing needs of pipes with different diameters.

[0014] Preferably, the angle adjustment mechanism includes a second adjustment drive, a first rotation component, and a second rotation component. The second adjustment drive simultaneously drives the first rotation component and the second rotation component. The first rotation component drives the first mounting seat to deflect around the pipe conveying axis, and the second rotation component drives the second mounting seat to deflect around the pipe conveying axis. The deflection angle of the first mounting seat is the same as the deflection angle of the second mounting seat.

[0015] By adopting the above technical solution, the upper and lower traction components can be synchronously deflected around the pipe conveying axis to adjust the torsion angle, avoiding unnecessary axial tension or compression and excessive torsional stress on the pipe during rotation, reducing plastic deformation of small-diameter or thin-walled pipes, ensuring the final product appearance and dimensions, and easily adapting to the high-precision processing requirements of different thread pitches for threaded pipes, simplifying the adjustment operation when processing different thread pitches.

[0016] Preferably, the second adjusting drive component includes a rotary drive source, a worm gear, a first turbine, and a second turbine. The rotary drive source drives the worm gear to rotate around an axis. The worm gear simultaneously meshes with the first turbine and the second turbine. The first turbine drives the first rotating assembly, and the second turbine drives the second rotating assembly.

[0017] By adopting the above technical solution, the rotary drive source drives the worm to rotate, and the worm meshes with the first turbine and the second turbine, respectively driving the first rotating component and the second rotating component, thereby causing the first mounting seat and the second mounting seat to deflect synchronously around the pipe conveying axis and the deflection angle is consistent, realizing the precise adjustment of the torsion angle, which is convenient for adapting to the processing of pipes with different pitches.

[0018] Preferably, the first rotating assembly includes a first rotating shaft, a first driving gear, and a first driven gear. The first rotating shaft is radially arranged and coaxially fixedly connected to the first turbine. The first driving gear is coaxially fixed on the first rotating shaft, and the first driven gear is fixed on the first mounting base. The first driving gear and the first driven gear are externally meshed. The second rotating assembly includes a second rotating shaft, a second driving gear, and a second driven gear. The second rotating shaft is radially arranged and coaxially fixedly connected to the second turbine. The second driving gear is coaxially fixed on the second rotating shaft, and the second driven gear is fixed on the second mounting base. The second driving gear and the second driven gear are externally meshed.

[0019] By adopting the above technical solution, the first rotating component and the second rotating component can be driven by the second adjusting drive component to make the first mounting base and the second mounting base rotate synchronously around the pipe conveying axis through gear transmission. This allows for convenient and precise adjustment of the torsion angle value, enabling flexible adjustment of the torsion capacity of the traction torsion mechanism, and adapting to the processing needs of plastic pipes with different pitches.

[0020] Preferably, the cutting mechanism includes a third driving member, a rotating shaft, and two axially arranged cutters. The rotating shaft is rotatably connected to the frame. The third driving member drives the rotating shaft to rotate around its axis. Both cutters are detachably fixed to the rotating shaft. The rotating shaft drives the cutters to rotate around their axis.

[0021] By adopting the above technical solution, the cutting mechanism of the rotary traction cutter uses a third driving component to drive the rotating shaft, which in turn drives the cutter that is detachably fixed to the rotating shaft to rotate around the axis, enabling the pipe to be cut to a fixed length; the cutter is detachable and fixed, which facilitates the replacement, maintenance and other operations of cutters with different blade types.

[0022] Preferably, the cutting mechanism further includes a guide assembly, which includes a guide shaft, a bushing, and a sleeve that are coaxially and detachably connected in sequence. The guide shaft, bushing, and sleeve are interconnected to form a guide channel. The guide shaft is fixed to the frame and located next to the rotating shaft. The sleeve is located near the discharge end of the traction gap.

[0023] By adopting the above technical solution, the guide shaft, bushing and sleeve in the guide assembly of the cutting mechanism are coaxially disassembled and connected in sequence to form a guide channel. The guide shaft is fixed to the frame and located next to the rotating shaft. The sleeve is set near the discharge end of the traction gap, which can guide the pipe and ensure that the pipe can be accurately delivered to the cutting position.

[0024] Preferably, the guide shaft has a cut that forms a clearance fit with the cutter, and the cut extends downward to penetrate the cross section of the guide channel.

[0025] By adopting the above technical solution, the guide shaft is opened to form a clearance fit with the cutter and extends downward to penetrate the cross section of the guide channel. This can avoid interference between the cutter and the guide shaft during the rotational cutting of the pipe, ensuring that the cutter can complete the cutting action smoothly and guaranteeing the normal operation of the cutting mechanism.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The traction conveying surfaces of the upper traction component and the lower traction component are set opposite to each other and parallel. The traction directions of the two components are symmetrically intersected to form a torsion angle to twist the pipe. While conveying the pipe, the pipe is subjected to uniform force from top to bottom and twisted to form a shape. This avoids the unnecessary axial tension or compression and excessive torsional stress caused by the pipe relying solely on the traction structure for material output when rotating. This prevents plastic deformation of small-diameter or thin-walled pipes before cutting and ensures the final product's appearance and dimensions. 2. The power output end of the gap adjustment mechanism is connected to any traction component, driving the corresponding traction component to move relative to the pipe radially, thereby adjusting the opening and closing size of the traction gap, so that the machine can adapt to the processing of pipes with different diameters. 3. The power output end of the angle adjustment mechanism is connected to the upper traction component and the lower traction component, driving them to rotate synchronously around the pipe conveying axis, thereby adjusting the angle value of the torsion angle. This can adapt to the high-precision processing requirements of different thread pitches of threaded pipes, eliminating the need to adjust and match the traction and rotation parts separately as in existing technologies, making operation more convenient. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the rotary traction cutting machine of this application; Figure 2 This is a bottom structural diagram of the rotary traction cutting machine of this application; Figure 3 This is a side view of the rotary traction cutting machine of this application; Figure 4 yes Figure 3 AA cross-section view; Figure 5 yes Figure 3 BB cross-section; Figure 6 This is another structural view of the rotary traction cutting machine of this application.

[0028] Explanation of reference numerals in the attached drawings: a. Torsion angle; 1. Frame; 2. Traction torsion mechanism; 21. Upper traction assembly; 211. First mounting base; 212. First belt; 213. First driving roller; 214. First driven roller; 215. First driving member; 22. Lower traction assembly; 221. Second mounting base; 222. Second belt; 223. Second driving roller; 224. Second driven roller; 225. Second driving member; 23. Gap adjustment mechanism; 231. First adjustment driving member; 232. Lead screw; 233. Lead screw sleeve; 24. Angle adjustment mechanism; 241. Second adjustment driving member; 2 411. Rotary drive source; 2412. Worm gear; 2413. First turbine; 2414. Second turbine; 242. First rotating assembly; 2421. First rotating shaft; 2422. First driving gear; 2423. First driven gear; 243. Second rotating assembly; 2431. Second rotating shaft; 2432. Second driving gear; 2433. Second driven gear; 3. Cutting mechanism; 31. Third driving component; 32. Rotating shaft; 33. Cutter; 34. Guide assembly; 341. Guide shaft; 3411. Cutting notch; 342. Bushing; 343. Sleeve; 344. Guide post. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] This application provides a rotary traction cutting machine, referring to... Figure 1 and Figure 2 The system includes a frame 1, a traction and torsion mechanism 2, and a cutting mechanism 3. The traction and torsion mechanism 2 and the cutting mechanism 3 are arranged sequentially on the frame 1 along the pipe conveying direction. The cutting station of the cutting mechanism 3 is coaxially connected with the pipe output end of the traction and torsion mechanism 2. This arrangement allows the pipe to directly enter the cutting mechanism 3 for fixed-length cutting after it comes out of the traction and torsion mechanism 2, ensuring the continuity of processing.

[0031] Specifically, the traction torsion mechanism 2 includes an upper traction component 21, a lower traction component 22, a gap adjustment mechanism 23, and an angle adjustment mechanism 24.

[0032] Reference Figure 2The upper traction assembly 21 includes a first mounting base 211, a first belt 212, a first driving roller 213, a first driven roller 214, and a first driving member 215. The first driving roller 213 and the first driven roller 214 are spaced apart along the pipe conveying direction, and both ends of the first driving roller 213 and the first driven roller 214 are rotatably mounted on the first mounting base 211 via bearings. The first driven roller 214 has the same structure and dimensions as the first driving roller 213. The first belt 212 is fitted around the outer circumference of the first driving roller 213 and the first driven roller 214. The output end of the first driving member 215 is fixedly connected to the first driving roller 213. The first driven roller 214 is arranged parallel to the axis of the first driving roller 213, and together they drive the first belt 212 to rotate. The first driving component 215 is a combination of a motor and a planetary reducer. When the motor starts, it outputs a low-speed, high-torque force through the planetary reducer to drive the first active roller 213 to rotate. The first active roller 213 drives the first belt 212 to move through friction. The first belt 212 drives the first driven roller 214 to rotate, thereby achieving the traction of the pipe.

[0033] Reference Figure 3 and Figure 4 The lower traction assembly 22 includes a second mounting base 221, a second belt 222, a second drive roller 223, a second driven roller 224, and a second drive member 225. The second drive roller 223 and the second driven roller 224 are spaced apart along the pipe conveying direction, and their ends are rotatably mounted on the second mounting base 221 via bearings. The second driven roller 224 has the same structure and dimensions as the second drive roller 223. The second belt 222 is fitted onto the outer circumference of the second drive roller 223 and the second driven roller 224. The output end of the second drive member 225 is fixedly connected to the second drive roller 223. The axes of the second driven roller 224 and the second drive roller 223 are parallel, cooperating to drive the second belt 222 to rotate. The second drive member 225 can also be a combination of a motor and a planetary reducer. The first drive roller 213 and the second drive roller 223 are driven to rotate in opposite directions, and their rotation speeds are the same, causing the upper and lower traction assemblies to generate opposite traction forces on the pipe, achieving pipe torsion. In this embodiment, the first driving roller 213 and the second driving roller 223 are arranged radially vertically, and the first driven roller 214 and the second driven roller 224 are arranged radially vertically. In other embodiments, the first driving roller 213 and the second driving roller 223, as well as the first driven roller 214 and the second driven roller 224, can also be arranged radially vertically.

[0034] Reference Figure 3 and Figure 5Specifically, in this application, the upper and lower belts are arranged alternately vertically along the radial direction of the pipe. The traction conveying surfaces of the upper and lower belts are opposite and parallel, forming a traction gap through which the pipe passes. Furthermore, the traction directions of the upper and lower belts intersect and are obliquely symmetrically arranged, forming a torsion angle α. When the pipe is pulled to the feed end of the traction gap, it is propelled forward by the combined action of the upper and lower belts within the gap, conveyed along the central axis of the torsion angle α. Simultaneously, under the action of the torsion angle α, the pipe is appropriately squeezed and twisted by the upper and lower belts, forming a spiral shape. It is important to note that, in order to achieve appropriate extrusion pressure, the size of the traction gap is determined in advance based on the outer diameter of the pipe, and the traction gap should be slightly smaller than the outer diameter of the pipe.

[0035] The gap adjustment mechanism 23 includes a first adjustment drive 231, a lead screw 232, and a lead screw sleeve 233. The lead screw sleeve 233 is fixed to the frame 1 via connecting parts such as angle steel and connecting plates. The output end of the first adjustment drive 231 is fixedly connected to the lead screw 232. The lead screw 232 is arranged radially along the pipe. The first adjustment drive 231 drives the lead screw 232 to rotate around its axis. The lead screw sleeve 233 has an internal thread, and the lead screw 232 passes through the lead screw sleeve 233 and is threadedly connected to it. In this embodiment, the axis of the lead screw 232 extends downwards and can intersect and be perpendicular to the pipe conveying axis. In this embodiment, the first adjustment drive 231 is a handwheel. Preferably, the first adjustment drive 231 can also be a stepper motor, which can precisely control the rotation angle and number of turns of the lead screw 232. The lead screw 232 is slidably arranged on the lead screw sleeve 233 radially along the pipe, and the first mounting base 211 is rotatably connected to the bottom of the lead screw 232. The first mounting seat can slide on the frame through the sliding structure of the slider and the slide groove. When the first adjusting drive 231 drives the lead screw 232 to rotate, the rotational motion of the lead screw 232 is converted into the linear motion of the first mounting seat 211 along the radial direction of the pipe. The opening and closing size of the traction gap can be adjusted flexibly according to the pipe diameter.

[0036] The angle adjustment mechanism 24 includes a second adjustment drive component 241, a first rotation component 242, and a second rotation component 243. The second adjustment drive component 241 includes a rotary drive source 2411, a worm gear 2412, a first turbine gear 2413, and a second turbine gear 2414. The rotary drive source 2411 is fixed to the frame 1 by connecting components such as angle steel and connecting plates. Both ends of the worm gear 2412 are rotatably mounted on the frame 1. The output end of the rotary drive source 2411 is fixedly connected to one end of the worm gear 2412 to drive the worm gear 2412 to rotate around its axis. The worm gear 2412 simultaneously meshes with the first turbine gear 2413 and the second turbine gear 2414. The worm gear transmission method has a large transmission ratio and good self-locking performance. The first turbine 2413 and the second turbine 2414 are rotatably mounted on the frame 1 via connecting parts such as angle steel and connecting plates. The first turbine 2413 drives the first rotating assembly 242 to rotate the first mounting base 211, and the second turbine 2414 drives the second rotating assembly 243 to rotate the second mounting base 221. In this embodiment, the rotary drive source 2411 is a handwheel; preferably, a stepper motor can also be used, which can precisely control the rotation angle and number of revolutions of the worm gear 2412.

[0037] Specifically, the first rotating assembly 242 includes a first rotating shaft 2421, a first driving gear 2422, and a first driven gear 2423. The first rotating shaft 2421 is rotatably mounted on the frame 1 along the radial direction of the tube. The bottom of the first rotating shaft 2421 is coaxially and fixedly connected to the first turbine 2413, and the top of the first rotating shaft 2421 is rotatably connected to the frame 1 through a bearing. The first driving gear 2422 is coaxially fixed on the first rotating shaft 2421, and the first driven gear 2423 is fixed on the first mounting base 211. The first driving gear 2422 and the first driven gear 2423 are externally meshed.

[0038] The second rotating assembly 243 includes a second rotating shaft 2431, a second driving gear 2432, and a second driven gear 2433. The second rotating shaft 2431 is rotatably mounted on the frame 1 along the radial direction of the pipe. The bottom of the second rotating shaft 2431 is coaxially and fixedly connected to the second turbine 2414, and the top of the second rotating shaft 2431 is rotatably connected to the frame 1 via a bearing. The second driven gear 2433 is fixed on the second mounting base 221, and the second driving gear 2432 meshes externally with the second driven gear 2433. Specifically, in this embodiment, the axes of the first driven gear 2423 and the second driven gear 2433 are both arranged radially along the pipe and are collinear. The axes of the first driven gear 2423 and the second driven gear 2433 can both extend to intersect and be perpendicular to the pipe conveying axis, so that the first mounting base 211 and the second mounting base 221 can rotate around the axes of the first driven gear 2423 and the second driven gear 2433.

[0039] When the rotary drive source 2411 drives the worm 2412 to rotate, the worm 2412 meshes with the first turbine 2413 and the second turbine 2414, respectively driving the first rotating shaft 2421 and the second rotating shaft 2431 to rotate. The driving gears on the first rotating shaft 2421 and the second rotating shaft 2431 drive the corresponding driven gears to rotate, causing the first mounting base 211 and the second mounting base 221 to deflect around the pipe conveying axis, adjusting the torsion angle α to adapt to the processing requirements of spiral pipes with different pitches.

[0040] Reference Figure 3 and Figure 6 Specifically, the cutting mechanism 3 in this embodiment includes a third driving component 31, a rotating shaft 32, two axially arranged cutters 33, and a guide assembly 34. The rotating shaft 32 is rotatably connected to the frame 1 via bearings. The third driving component 31 can be a motor and is fixed to the frame 1. When the motor is started, it drives the rotating shaft 32 to rotate around its axis. Both cutters 33 are detachably fastened to the rotating shaft 32 by bolts, so that the rotating shaft 32 can drive the two cutters 33 to rotate synchronously around their axis, thereby achieving fixed-length cutting of the pipe. The cutters 33 are usually made of sharp and wear-resistant materials such as high-speed steel. The detachable design facilitates replacement with cutters 33 of different cutting types, such as flat cuts and bevel cuts, as well as subsequent maintenance of the cutters 33.

[0041] The guide assembly 34 includes a guide shaft 341, a bushing 342, and a sleeve 343, which are coaxially and detachably connected in sequence. The guide shaft 341, bushing 342, and sleeve 343 are interconnected to form a guide channel, providing guidance for pipe conveying and ensuring that the pipe accurately enters the cutting station. The guide shaft 341 is fixed to the frame 1 and located beside the rotating shaft 32, while the sleeve 343 is located near the discharge end of the traction gap. The guide shaft 341 has a slit 3411 that forms a clearance fit with the cutter 33. The slit 3411 extends downward to penetrate the cross-section of the guide channel, ensuring that the cutter 33 does not interfere with the guide shaft 341 when rotating to cut the pipe, thus ensuring smooth cutting operation.

[0042] Preferably, the guide assembly 34 further includes a guide post 344, which is detachably mounted on the frame 1. The guide post 344 has a through hole, which is coaxial with the guide channel.

[0043] The implementation principle of this embodiment is as follows: This rotary traction cutting machine uses an upper traction assembly 21 and a lower traction assembly 22 to traction and twist the pipe. A gap adjustment mechanism 23 adjusts the traction gap to adapt to pipes of different diameters, and an angle adjustment mechanism 24 adjusts the torsion angle α to meet the processing requirements of spiral pipes with different pitches. The cutting mechanism 3 cuts the traction-twisted pipe to a fixed length. Compared with existing technologies, this avoids unnecessary axial tension or compression and excessive torsional stress on the pipe during rotation, reducing the possibility of plastic deformation and improving the appearance and dimensional accuracy of the product. Simultaneously, adjusting the torsion angle α easily adapts to the processing requirements of different pitches, making operation simpler and improving production efficiency and equipment versatility.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotary traction cutting machine, characterized in that, The device includes a frame (1) and a traction and torsion mechanism (2) and a cutting mechanism (3) arranged sequentially along the pipe conveying direction. The traction and torsion mechanism (2) includes an upper traction assembly (21), a lower traction assembly (22), a gap adjustment mechanism (23), and an angle adjustment mechanism (24). The upper traction assembly (21) and the lower traction assembly (22) are arranged alternately up and down along the radial direction of the pipe. The traction conveying surface of the upper traction assembly (21) and the traction conveying surface of the lower traction assembly (22) are opposite to and parallel to each other. Their traction directions are symmetrically intersecting to form a torsion angle (a), and the two traction conveying surfaces enclose a traction channel for the pipe to pass through. The gap adjustment mechanism (23) is connected to any traction component, driving the corresponding traction component to move radially relative to the pipe to adjust the opening and closing size of the traction gap. The power output end of the angle adjustment mechanism (24) is connected to the upper traction component (21) and the lower traction component (22), driving the upper traction component (21) and the lower traction component (22) to rotate synchronously around the pipe conveying axis to adjust the angle value of the torsion angle (a). The cutting station of the cutting mechanism (3) is coaxially connected to the pipe output end of the traction torsion mechanism (2) for fixed-length pipe cutting.

2. The rotary traction cutting machine according to claim 1, characterized in that, The upper traction assembly (21) includes a first mounting base (211), a first belt (212), a first drive roller (213), a first driven roller (214), and a first drive member (215). The first drive roller (213) and the first driven roller (214) are spaced apart and rotatably disposed on the first mounting base (211) along the pipe conveying direction. The first belt (212) is sleeved on the outer circumferential surface of the first drive roller (213) and the first driven roller (214). The output end of the first drive member (215) is fixedly connected to the first drive roller (213). The first belt (212) is rotatably disposed on the first mounting base (211) through the first drive member (215).

3. The rotary traction cutting machine according to claim 2, characterized in that, The lower traction assembly (22) includes a second mounting base (221), a second belt (222), a second drive roller (223), a second driven roller (224), and a second drive member (225). The second drive roller (223) and the second driven roller (224) are spaced apart and rotatably disposed on the second mounting base (221) along the pipe conveying direction. The second belt (222) is sleeved on the outer circumferential surface of the second drive roller (223) and the second driven roller (224). The output end of the second drive member (225) is fixedly connected to the second drive roller (223). The first drive roller (213) and the second drive roller (223) rotate in opposite directions.

4. The rotary traction cutting machine according to claim 2, characterized in that, The gap adjustment mechanism (23) includes a first adjustment drive (231), a lead screw (232) and a lead screw sleeve (233). The lead screw (232) is fixedly connected to the output end of the first adjustment drive (231) along the radial direction of the pipe and is driven to rotate around the axis. The lead screw sleeve (233) is fixedly installed on the frame (1) and threadedly connected to the lead screw (232). The lead screw (232) is rotatably connected to the first mounting base (211). The lead screw (232) can rotate and move radially along the pipe.

5. The rotary traction cutting machine according to claim 3, characterized in that, The angle adjustment mechanism (24) includes a second adjustment drive (241), a first rotation component (242), and a second rotation component (243). The second adjustment drive (241) simultaneously drives the first rotation component (242) and the second rotation component (243). The first rotation component (242) drives the first mounting base (211) to deflect around the pipe conveying axis, and the second rotation component (243) drives the second mounting base (221) to deflect around the pipe conveying axis. The deflection angle of the first mounting base (211) is consistent with the deflection angle of the second mounting base (221).

6. The rotary traction cutting machine according to claim 5, characterized in that, The second adjustment drive (241) includes a rotary drive source (2411), a worm (2412), a first turbine (2413), and a second turbine (2414). The rotary drive source (2411) drives the worm (2412) to rotate around an axis. The worm (2412) meshes with both the first turbine (2413) and the second turbine (2414). The first turbine (2413) drives the first rotating assembly (242), and the second turbine (2414) drives the second rotating assembly (243).

7. The rotary traction cutting machine according to claim 6, characterized in that, The first rotating assembly (242) includes a first rotating shaft (2421), a first driving gear (2422), and a first driven gear (2423). The first rotating shaft (2421) is radially arranged and coaxially fixedly connected to the first turbine (2413). The first driving gear (2422) is coaxially fixed on the first rotating shaft (2421). The first driven gear (2423) is fixed on the first mounting base (211). The first driving gear (2422) and the first driven gear (2423) are externally meshed. The second rotating assembly (243) includes a second rotating shaft (2431), a second driving gear (2432), and a second driven gear (2433). The second rotating shaft (2431) is radially arranged and coaxially fixedly connected to the second turbine (2414). The second driving gear (2432) is coaxially fixed on the second rotating shaft (2431). The second driven gear (2433) is fixed on the second mounting base (221). The second driving gear (2432) and the second driven gear (2433) are externally meshed.

8. The rotary traction cutting machine according to claim 1, characterized in that, The cutting mechanism (3) includes a third driving member (31), a rotating shaft (32), and two axially arranged cutters (33). The rotating shaft (32) is rotatably connected to the frame (1). The third driving member (31) drives the rotating shaft (32) to rotate around the axis. Both cutters (33) can be detachably fixed to the rotating shaft (32). The rotating shaft (32) drives the cutters (33) to rotate around the axis.

9. The rotary traction cutting machine according to claim 8, characterized in that, The cutting mechanism (3) further includes a guide assembly (34), which includes a guide shaft (341), a bushing (342), and a sleeve (343) that are coaxially and detachably connected in sequence. The guide shaft (341), bushing (342), and sleeve (343) are interconnected to form a guide channel. The guide shaft (341) is fixed to the frame (1) and located next to the rotating shaft (32). The sleeve (343) is located near the discharge end of the traction gap.

10. The rotary traction cutting machine according to claim 9, characterized in that, The guide shaft (341) has a cut (3411) that forms a clearance fit with the cutter (33), and the cut (3411) extends downward to penetrate the cross section of the guide channel.

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