A fully automatic production method for small catheters

Abstract

The present application relates to a fully automatic production method for small conduits, and relates to the technical field of tunnel construction, which includes the following steps: S1: cutting small conduits: transporting a plurality of small conduits to a cutting device via a first transport track for cutting; S2: shrinking small conduits: S21: transporting small conduits: transporting small conduits from the first transport track to a second transport track; S22: inserting a protective rod: inserting a protective rod in the inner cavity of the part of the small conduit to be shrunk; S23: transporting the small conduit and the protective rod to a shrinking device via a second transport track for shrinking; S3: removing the protective rod after shrinking; S4: removing the small conduit. The present application has the effect of improving the support and protection of the inner wall of the small conduit.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel construction, and in particular to a fully automatic production method for small conduits. Background Art

[0002] In tunnel construction, small conduits are important support and reinforcement devices and are widely used to reinforce the geotechnical structure around the tunnel. However, the traditional manual production method is inefficient and error-prone, and cannot meet the market demand for efficient, precise and reliable production of small conduits.

[0003] In the prior art, the small catheter is first transported to a cutting machine by a conveying track, and the cutting machine cuts a plurality of holes on the outer wall of the small catheter. After the cutting is completed, the small catheter is moved away from the cutting machine and transported to a tip shrinking device by a conveying track again. The tip shrinking device performs a tip shrinking process on the end of the small catheter so that the tip shrinking device extrude the end of the small catheter into a cone. After the processing is completed, the small catheter can be removed.

[0004] With respect to the above-mentioned related technologies, when the small catheter is being tapered, since the outer wall needs to be processed, the inner wall of the small catheter may also be squeezed and deformed during the processing, thereby affecting the final processing quality of the small catheter. Therefore, how to improve the support and protection effect of the inner wall of the small catheter through automated equipment becomes a problem to be solved in this application. Summary of the invention

[0005] In order to improve the supporting and protecting effect of the inner wall of a small catheter, the present application provides a fully automatic production method for a small catheter.

[0006] The present application provides a fully automatic production method for small catheters, which adopts the following technical solutions:

[0007] A fully automatic production method for a small catheter comprises the following steps:

[0008] S1: Cutting small catheter:

[0009] Transporting a plurality of small catheters to a cutting device through a first transport track for cutting;

[0010] S2: Small catheter with reduced tip:

[0011] S21: transporting the small catheter: transporting the small catheter from the first transport track to the second transport track;

[0012] S22: Inserting a protective rod: inserting a protective rod into the inner cavity of the part of the small catheter to be reduced in tip;

[0013] S23: transporting the small catheter and the protection rod to the tip-reducing device through the second transport track for tip-reduction;

[0014] S3: After the tip reduction is completed, the protective rod is removed;

[0015] S4: Remove the small catheter.

[0016] By adopting the above technical solution, when producing small catheters, it is necessary to first transport the small catheters through the first transport track to the cutting equipment to cut holes. After the cutting is completed, the small catheters are transported from the first transport track to the second transport track to prepare for shrinking. Before shrinking, in order to support the inner wall of the small catheter, a protective rod is inserted into the inner wall of the small catheter. During processing, the small catheter and the protective rod are transported together to the shrinking equipment for shrinking. After the shrinking is completed, the protective rod is first removed, and then the small catheter is removed to complete the overall production and processing. By inserting the protective rod in the small catheter, the protective rod supports the inner wall of the small catheter, thereby reducing the deformation of the inner wall of the small catheter during processing.

[0017] Optionally, the second transport track is provided with a plurality of second support members at intervals along its own transport direction, and the second support members slide along the transport direction of the second transport track. The second support members include a support shaft and a first clamping member, the support shaft is perpendicular to the transport direction of the second transport track, and the first clamping member is located on the side of the support shaft away from the second transport track for clamping the small catheter.

[0018] By adopting the above technical solution, after the small catheter is located on the second conveying track, in order to support the small catheter, a support shaft is provided to support the small catheter, and the side wall of the small catheter is clamped and fixed by the first clamping member to prevent the small catheter from slipping, and the second support member can slide along the length direction of the second conveying track to drive the small catheter to slide toward the tip reduction device.

[0019] Optionally, two first clamping members are provided, and the two first clamping members are spaced apart along the length direction of the support shaft to form a first clamping area between the two first clamping members, and the first clamping member slides along the length direction parallel to the support shaft to change the width of the first clamping area.

[0020] By adopting the above technical solution, since the small catheters have different specifications and the outer diameters of the small catheters of different specifications are different, in order to fix the small catheters with different outer diameters, the first clamping member slides along the length direction of the support shaft so that there are two first clamping members to clamp and fix the small catheters with different outer diameters.

[0021] Optionally, the protection bar is parallel to the transport direction of the second transport track, and the protection bar slides along the transport direction of the second transport track.

[0022] By adopting the above technical solution, a protective rod is set, the protective rod slides along the transport direction of the second transport track, and the protective rod is further pushed into the small tube, so that the protective rod protects and supports the inner wall of the small tube.

[0023] Optionally, the end of the protection rod is detachably connected with a protection head.

[0024] By adopting the above technical solution, since the inner diameters of small catheters of different specifications are different, in order to adapt to small catheters of different inner diameters, the protective head can be detachably connected to the protective rod, which is convenient for personnel to disassemble and replace protective heads of different sizes so that the outer wall of the protective head fits the inner wall of the small catheter.

[0025] Optionally, the protective head is conical, and the outer diameter of the conical portion of the protective head gradually decreases toward a side away from the protective rod.

[0026] By adopting the above technical solution, since the end of the small catheter is finally processed into a cone through the tip reduction equipment, one end of the protective rod is also set to be a cone accordingly to match the part of the small catheter to be processed.

[0027] Optionally, the second transport track is provided with a plurality of third support members at intervals along its length direction, the third support members are located on the side of the support shaft away from the tip shrinking device, the third support members include a clamping roller, the clamping roller is rotatably connected to the second transport track, and the clamping roller is provided with a recess for supporting the protective rod.

[0028] By adopting the above technical solution, in order to support the protective rod, a clamping roller is provided, and the protective rod is supported by the concave portion of the clamping roller, and the rotation of the clamping roller drives the protective rod to move toward the side close to the small catheter.

[0029] Optionally, the S22 includes: the small catheter is overlapped on the support shaft and in place, and the clamping roller transports the protective rod into the small catheter so that the outer wall of the protective head is aligned with the inner wall of the area of ​​the small catheter to be tapered.

[0030] By adopting the above technical solution, the protective rod is transported into the small catheter under the rotation of the clamping roller, and the protective rod and the small catheter are transported together to the tip reduction equipment for processing.

[0031] Optionally, a fixing assembly is provided on the protection rod, the fixing assembly abuts against a side of the clamping roller close to the support shaft, and the fixing assembly includes a collar and two second clamping members;

[0032] The collar is coaxially sleeved on the protection rod, and the collar is slidably connected to the protection rod along the length direction of the protection rod;

[0033] The second clamping member is disposed on the collar, so that a second clamping area for clamping the protective rod is formed between two of the second clamping members;

[0034] The length of the protection rod is greater than the length of the small catheter.

[0035] By adopting the above technical solution, when the protective rod moves to the inner wall of the small catheter, the small catheter moves together with the protective rod to the tip shrinking device. During this process, in order to fix the protective rod and the small catheter and prevent the protective rod from detaching from the small catheter, a ring is provided on the protective rod, and second clamping members are provided at both ends of the ring. The ring can slide along the length direction of the protective rod, and the protective rod drives the ring to move toward one side of the small catheter. When the protective rod is in place, the ring abuts against the end wall of the small catheter, and the two second clamping members clamp and fix the small catheter, thereby achieving fixation of the small catheter and the protective rod. By setting two second clamping members, it can be ensured that the protective rod and the small catheter always remain in a coaxial state, and the inner wall of the small catheter can be evenly protected.

[0036] Optionally, the outer diameter of the collar is larger than the outer diameter of the small catheter.

[0037] By adopting the above technical solution, during the sliding process of the protection rod, in order to enable the ring to abut against the end wall of the small catheter and prevent the ring from entering the small catheter, the outer diameter of the ring is larger than the outer diameter of the small catheter.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. The present application provides a protective rod to support the portion of the inner wall of the small catheter to be tapered, thereby preventing the inner wall of the small catheter from being squeezed and deformed when the end of the small catheter is tapered;

[0040] 2. The present application provides a support shaft and a first clamping member, and can clamp and fix small catheters of different outer diameters through two first clamping members;

[0041] 3. The present application arranges a fixing assembly on the protection rod. When the protection rod is in place, the second clamping member fixes the small catheter and the protection rod to prevent the protection rod from being separated from the small catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall structure of the small catheter production method of the present application;

[0043] Figure 2 It is a schematic diagram of the structure of the small catheter of the present application processed by the tip shrinking process;

[0044] Figure 3 yes Figure 1 A magnified view of part A;

[0045] Figure 4 It is a schematic diagram of the structure of the protection rod and the protection head of the present application;

[0046] Figure 5 It is a schematic diagram of the structure of the connection between the third support member and the protection rod of the present application;

[0047] Figure 6 It is a structural schematic diagram of the third support member of the present application;

[0048] Figure 7 It is a structural schematic diagram of the fixed components of this application.

[0049] Explanation of the accompanying drawings: 01, small duct; 1, transport rack; 11, placement part; 12, transport part; 2, first transport track; 21, first support member; 22, rotating frame; 221, clamping groove; 23, first driving member; 231, rotating shaft; 232, first mounting seat; 233, motor; 3, cutting equipment; 4, second transport track; 41, second support member; 411, support shaft; 412, first clamping member; 413, sliding seat; 414, first clamping area; 415, second driving member; 42, slide groove; 43, third support member; 431, clamping roller; 4311, recess; 432, second mounting seat; 5, transition rod; 6, tapering device; 7, protective rod; 71, protective head; 8, fixing assembly; 81, collar; 82, second clamping member; 821, second clamping area; 822, arc groove; 83, third driving member. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-7 This application is described in further detail.

[0051] The embodiment of the present application discloses a fully automatic production method for a small catheter.

[0052] Reference Figure 1 , a fully automatic production method for a small catheter, comprising the following steps:

[0053] S1: Cutting small catheter:

[0054] A plurality of small tubes 01 are placed on the transport rack 1, and the small tubes 01 are transported along the transport rack 1 to the first transport track 2. The transport rack 1 includes a placing portion 11 and a transport portion 12. The placing portion 11 is horizontally arranged, and the transport portion 12 is fixedly connected to the placing portion 11, and the transport portion 12 is inclined. A first transport track 2 is arranged on a side of the transport portion 12 away from the placing portion 11, and the transport portion 12 is inclined downward in a direction close to the first transport track 2. A plurality of small tubes 01 are placed on the placing portion 11. During operation, the small tubes 01 to be processed fall along the inclined direction of the transport portion 12 to the first transport track 2, and the small tubes 01 are transported to the cutting device 3 by the first transport track 2.

[0055] Reference Figure 1 , a plurality of holes are cut into the outer peripheral wall of the small conduit 01 by the cutting device 3, and a plurality of first support members 21 are provided at intervals along the length direction of the first transport track 2, and the first support members 21 support the small conduit 01 to be processed and transport it to the cutting device 3 for cutting;

[0056] In this embodiment, the cutting device 3 is a plasma cutting machine. The plasma cutting machine generates plasma gas through a high-frequency electric arc. The plasma in the plasma gas releases high-energy ions under high pressure. These ions react with the material on the surface of the cutting object to generate high temperature, gasification and explosion, so that a very small hole is formed on the surface of the cut metal, and then the high-speed ion flow and high-pressure air flow quickly pass through the hole to cut the metal from the center part to the outside to form a hole. The plasma cutting machine is a prior art in this field, and the specific structure of the cutting device 3 will not be described in detail in this application.

[0057] Reference Figure 1 After the cutting is completed, in order to transport the small tube 01 to be processed to the next processing step, a rotating frame 22 is further provided on the first transport track 2. The rotating frame 22 is arranged at one end of the first support member 21 away from the cutting device 3. The rotating frame 22 is provided with a plurality of intervals along the transport direction of the first transport track 2. A clamping groove 221 is opened on the top of the rotating frame 22 along the vertical direction. In this embodiment, the clamping groove 221 is a triangular groove. The rotating frame 22 is rotatably connected to the first transport track 2. The rotation axis of the rotating frame 22 is parallel to the transport direction of the first transport track 2. The small tube 01 to be processed slides toward the side away from the cutting device 3 into the clamping groove 221 of the rotating frame 22;

[0058] Reference Figure 1 In order to drive the rotating frame 22 to rotate, a first driving member 23 is also provided on the first transport track 2. The first driving member 23 includes a rotating shaft 231, a first mounting seat 232 and a motor 233. The rotating shaft 231 is parallel to the transport direction of the first transport pipeline, and the rotating shaft 231 is penetrated on the side of the rotating frame 22 close to the second transport track 4. Both ends of the rotating shaft 231 are rotatably connected to the first mounting seat 232, and the first mounting seat 232 is fixedly connected to the first transport track 2. The housing of the motor 233 is fixedly connected to the first mounting seat 232, and the output shaft of the motor 233 is coaxially fixedly connected to the rotating shaft 231.

[0059] Reference Figure 1, and transport the cut small catheter 01 to the second transport track 4. The second transport track 4 is arranged side by side with the first transport track 2, and a transition rod 5 is connected between the first transport track 2 and the second transport track 4. After the small catheter 01 to be processed slides to the side away from the cutting device 3 into the clamping groove 221 of the rotating frame 22, the rotating frame 22 rotates along the first transport track 2 so that the clamping groove 221 faces the second transport track 4, and the side wall of the clamping groove 221 is under the action of the inertia force, and the small catheter 01 to be processed located in the clamping groove 221 slides along the transition rod 5 to the second transport track 4 for the next processing.

[0060] S2: Small catheter with reduced tip 01:

[0061] S21: Transport catheter 01: Reference Figure 1 and Figure 2 , align the small catheter 01 with the tip-shrinking device 6, which is located on one side of the second transport track 4. The tip-shrinking device 6 is mainly used for automated processing of the tip of the small catheter 01. Place the small catheter 01 into the tip-shrinking device 6, and use rotation and extrusion force to gradually shrink one end of the catheter to form a tip-shrinking effect.

[0062] S22: inserting the protection rod 7: inserting the protection rod 7 in the inner cavity of the part of the small catheter 01 to be tapered. After the small catheter 01 is in place on the second transport track 4, the protection rod 7 is inserted in the small catheter 01, and the protection rod 7 supports the inner wall of the small catheter 01 to prevent the inner wall of the small catheter 01 from being squeezed or damaged when the outer wall of the small catheter 01 is tapered;

[0063] S23: transporting the small catheter 01 and the protection rod 7 to the tip-reducing device 6 through the second transport track 4 for tip-reduction;

[0064] S3: After the tip is reduced, the protective rod 7 is removed;

[0065] S4: Remove small catheter 01.

[0066] Reference Figure 1 and Figure 3When the small tube 01 is transported from the first transport track 2 to the second transport track 4, in order to support the small tube 01, the second transport track 4 is provided with a plurality of second support members 41 at intervals along its length direction. The second support member 41 includes a support shaft 411, two first clamping members 412 and a sliding seat 413. The second transport track 4 is provided with a plurality of slide grooves 42 along its length direction. In this embodiment, there are two slide grooves 42, and the two slide grooves 42 are arranged at intervals along the transport direction perpendicular to the second transport track 4. A sliding seat is provided in each slide groove 42. 413, one end of the sliding seat 413 is slidably connected to the second transport track 4 along the groove wall of the slide groove 42, the support shaft 411 is perpendicular to the transport direction of the second transport track 4, the support shaft 411 is fixedly connected between the two sliding seats 413, the two first clamping members 412 are located above the support shaft 411, and a first clamping area 414 is formed between the two first clamping members 412, the small catheter 01 is overlapped on the support shaft 411, and when the sliding seat 413 slides along the groove wall of the slide groove 42, it also drives the small catheter 01 on the support shaft 411 to move toward the side close to the tip shrinking device 6.

[0067] Reference Figure 3 Since the small tubes 01 have different outer diameters, in order to clamp the small tubes 01 with different outer diameters, the first clamping member 412 slides along the length direction parallel to the support shaft 411 to change the width of the first clamping area 414, and the two first clamping members 412 slide toward or away from each other;

[0068] Reference Figure 3 In order to drive the first clamping member 412 to slide, a second driving member 415 is provided on the side of each first clamping member 412 away from the first clamping area 414. In this embodiment, the second driving member 415 is a cylinder, and the cylinder shell of the cylinder is fixedly connected to the side wall of the sliding seat 413. The piston rod of the cylinder is parallel to the length direction of the support shaft 411. The piston rod of the cylinder passes through the sliding seat 413 and is fixedly connected to the first clamping member 412, so that the second driving member 415 drives the two first clamping members 412 to move closer to or away from each other.

[0069] Reference Figure 4 The tip-shrinking device 6 processes one end of the small catheter 01 into a cone by extrusion. In order to support and protect the inner wall of the small catheter 01, a protective rod 7 is provided in the inner cavity of the small catheter 01. The protective rod 7 is located at the end of the small catheter 01 to be processed into a cone. In order to insert the protective rod 7 into the inner wall of the small catheter 01, a protective head 71 is provided at one end of the protective rod 7. The outer diameter of the protective rod 8 is smaller than the inner diameter of the small catheter 01. In this embodiment, the cross-section of the protective rod 8 is circular, so that the protective rod 7 can be pushed to the inner wall of the small catheter 01 through the protective rod 8.

[0070] Reference Figure 4In some embodiments, the protective rod 7 and the protective head 71 can be fixedly connected or detachably connected. Since the inner diameters of small catheters 01 of different specifications are different, in order for the protective rod 7 to adapt to small catheters 01 with different inner diameters, in this embodiment, the protective head 71 and the protective rod 7 are detachably connected. Preferably, the protective head 71 is threadedly connected to the protective rod 7. The end of the protective head 71 away from the protective rod 7 is tapered, and the outer diameter of the tapered part of the protective head 71 gradually decreases toward the side away from the protective rod 7. Since one end of the small catheter 01 is eventually processed into a tapered shape, the protective head 71 and the small catheter 01 have the same shape after processing, so that the protective head 71 supports the inner wall of the small catheter 01 to reduce the deformation of the inner wall of the small catheter 01 during processing.

[0071] Reference Figure 5 and Figure 6 In order to move the protective rod 7 toward the side of the small catheter 01, the protective rod 7 slides along the length direction of the second transport track 4. In order to drive the protective rod 7 to slide, the second transport track 4 is provided with a plurality of third support members 43 at intervals along its own length direction. The third support member 43 includes a clamping roller 431 and a second mounting seat 432. The clamping roller 431 is rotatably connected to the second transport track 4. The rotation axis of the clamping roller 431 is perpendicular to the transport direction of the second transport track 4. Both ends of the clamping roller 431 are connected to the second transport track 4 through the second mounting seat 432. The clamping roller 431 is rotatably connected to the second mounting seat 432. The clamping roller 431 is provided with a recess 4311 for supporting the protective rod 7. The clamping roller 431 rotates, thereby driving the protective rod 8 to slide toward the side of the small catheter 01 to be processed.

[0072] Reference Figure 5 and Figure 7 When the protective rod 7 moves to the inner side of the small catheter 01, since the small catheter 01 and the protective rod 7 need to move to the tip shrinking device 6 at the same time, in order to ensure that the protective rod 7 is stably inserted into the inner wall of the small catheter 01, a fixing component 8 is provided on the protective rod 7, and the fixing component 8 abuts against the side of the clamping roller 431 close to the support shaft 411. The fixing component 8 includes a collar 81 and two second clamping members 82. The collar 81 is coaxially sleeved on the protective rod 7, and the collar 81 slides along the length direction of the protective rod 7. Two second clamping members 82 are provided on the collar 81, and the second clamping members 82 are located on the side of the collar 81 close to the small catheter 01, so as to form a second clamping area 821 between the two second clamping members 82, and the second clamping member 82 slides along the radial direction of the collar 81 to change the width of the second clamping area 821.

[0073] Reference Figure 5 and Figure 7In order to drive the second clamping member 82 to slide, a third driving member 83 is provided on the side of the second clamping member 82 away from the second clamping area 822. In this embodiment, the third driving member 83 is a cylinder, the cylinder shell of the cylinder is fixedly connected to the collar 81, the piston rod of the cylinder is parallel to the second direction, and the piston rod of the cylinder is fixedly connected to the second clamping member 82, so that the second clamping member 82 is driven by the third driving member 83 to slide along the second direction; when the protective rod 7 is overlapped on the clamping roller 431, the clamping roller 431 will not interfere with the collar 81. In order to prevent the collar 81 from entering the small catheter 01, in this embodiment, the outer diameter of the collar 81 is larger than the outer diameter of the small catheter 01.

[0074] Reference Figure 5 and Figure 7 In order to improve the clamping effect of the second clamping member 82 on the small catheter 01, an arc groove 823 is opened along the transport direction of the second transport track 4 on the side where the second clamping members 82 are close to each other, so that the arc-shaped second clamping member 82 can better fit the outer wall of the small catheter 01, thereby improving the clamping and fixing effect of the small catheter 01.

[0075] Reference Figure 5 and Figure 7 When the protection rod 7 moves toward the inner wall of the small catheter 01, since the ring 81 can slide along the length direction of the protection rod 7, when the ring 81 abuts against the small catheter 01, the protection rod 7 continues to slide until the protection rod 7 pushes the protection head 71 into place, and the protection rod 7 stops sliding. At this time, the ring 81 still abuts against the end wall of the small catheter 01, and the end of the protection rod 7 away from the protection head 71 overlaps the clamping roller 431, and the third driving member 83 drives the two second clamping members 82 to slide toward the side close to each other until the outer wall of the small catheter 01 is clamped, so that the small catheter 01 and the protection rod 7 are fixed by the second clamping member 82, and then the small catheter 01 and the protection rod 7 slide toward the side close to the tip shrinking device 6;

[0076] Reference Figure 5 and Figure 7 When the small catheter 01 is in place, the end of the small catheter 01 is processed by the tip-shrinking device 6. After the processing is completed, the small catheter 01 slides together with the protective rod 7 in the opposite direction until the protective rod 7 is again overlapped on the clamping roller 431, and the third driving member 83 drives the two second clamping members 82 to slide away from each other to loosen the small catheter 01 and the protective rod 7. The clamping roller 431 rotates in the opposite direction to drive the protective rod 7 to separate from the small catheter 01, and the processed small catheter 01 can be removed.

[0077] In order to drive the cutting device 3 and the tapering device 6 to process the small catheter 01, the control system is operated to control the mechanical moving parts to perform corresponding operations according to the operation buttons, limit switches and other command signals and sensor signals given on site to achieve the cutting and tapering of the small catheter 01.

[0078] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fully automatic production method for small catheters, characterized in that: The following steps are involved: S1: Cutting small catheter (01): Transporting a plurality of small catheters (01) via a first transport track (2) to a cutting device (3) for cutting; S2: Small catheter with reduced tip (01): S21: transporting the small catheter (01): transporting the small catheter (01) from the first transport track (2) to the second transport track (4); S22: inserting a protection rod (7): inserting a protection rod (7) into the inner cavity of the portion of the small catheter (01) to be tapered; S23: transporting the small catheter (01) and the protection rod (7) via the second transport track (4) to the tip-reducing device (6) for tip-reduction; S3: After the tip is reduced, the protective rod (7) is removed; S4: Remove the small catheter (01); The second transport track (4) is provided with a plurality of second support members (41) at intervals along its own transport direction, the second support members (41) slide along the transport direction of the second transport track (4), the second support members (41) comprise a support shaft (411) and a first clamping member (412), the support shaft (411) is perpendicular to the transport direction of the second transport track (4), and the first clamping member (412) is located on a side of the support shaft (411) away from the second transport track (4) for clamping the small catheter (01); The second transport track (4) is provided with a plurality of third support members (43) at intervals along its length direction, the third support members (43) being located on a side of the support shaft (411) away from the tip shrinking device (6), the third support member (43) comprising a clamping roller (431), the clamping roller (431) being rotatably connected to the second transport track (4), the clamping roller (431) being provided with a recess (4311) for supporting the protective rod (7); The protection rod (7) is provided with a fixing assembly (8), the fixing assembly (8) abuts against a side of the clamping roller (431) close to the support shaft (411), and the fixing assembly (8) comprises a collar (81) and two second clamping members (82); The collar (81) is coaxially sleeved on the protection rod (7), and the collar (81) is slidably connected to the protection rod (7) along the length direction of the protection rod (7); The second clamping member (82) is arranged on the collar (81) so that a second clamping area (821) for clamping the protective rod (7) is formed between the two second clamping members (82), and the second clamping member (82) slides along the radial direction of the collar (81) to change the width of the second clamping area (821).

2. A fully automatic production method for small catheters according to claim 1, characterized in that: There are two first clamping members (412), and the two first clamping members (412) are spaced apart along the length direction of the support shaft (411) so as to form a first clamping area (414) between the two first clamping members (412), and the first clamping member (412) slides along the length direction parallel to the support shaft (411) to change the width of the first clamping area (414).

3. A fully automatic production method for small catheters according to claim 1, characterized in that: The protection bar (7) is parallel to the transport direction of the second transport track (4), and the protection bar (7) slides along the transport direction of the second transport track (4).

4. The fully automatic production method of a small catheter according to claim 1, characterized in that: The end of the protection rod (7) is detachably connected with a protection head (71).

5. A fully automatic production method for small catheters according to claim 4, characterized in that: The protective head (71) is tapered, and the outer diameter of the tapered portion of the protective head (71) gradually decreases toward a side away from the protective rod (7).

6. A fully automatic production method for small catheters according to claim 4, characterized in that: The S22 comprises: the small catheter (01) is overlapped on the support shaft (411) and put in place, and the clamping roller (431) transports the protective rod (7) into the small catheter (01) so that the outer wall of the protective head (71) is aligned with the inner wall of the area of ​​the small catheter (01) to be tapered.

7. The fully automatic production method of a small catheter according to claim 1, characterized in that: The length of the protection rod (7) is greater than the length of the small catheter (01).

8. The fully automatic production method of a small catheter according to claim 1, characterized in that: The outer diameter of the collar (81) is greater than the outer diameter of the small catheter (01).

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