Medical catheter laser drilling equipment capable of reducing thermal deformation of materials

Abstract

The invention relates to the field of medical catheter drilling, and discloses medical catheter laser drilling equipment capable of reducing thermal deformation of materials, the medical catheter laser drilling equipment comprises an air supply assembly arranged in an equipment body, the air supply assembly mainly comprises a mounting cylinder, an air chamber, a connecting pipe, a cleaning rod and an air nozzle, the air chamber is formed in the mounting cylinder, and the connecting pipe is arranged in the air chamber; the medical catheter laser drilling equipment comprises a mounting cylinder, a connecting pipe is arranged in the mounting cylinder, a cleaning rod is arranged in the connecting pipe in a sliding mode, and an air nozzle is fixedly arranged at the other end of the connecting pipe. Inert gas (such as nitrogen) can be blown into the guide pipe at the same time, a gas protection layer is formed on the outer wall of the guide pipe, oxygen is effectively isolated, hole edges are prevented from being oxidized and carbonized, melt is taken away in time through internal airflow, and recasting layers and burrs are remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of medical catheter drilling technology, specifically to a medical catheter laser drilling device that reduces thermal deformation of materials. Background Technology

[0002] In the field of micro-hole fabrication for medical catheters, laser processing technology (especially ultraviolet picosecond and femtosecond lasers) has become the mainstream process due to its high precision and non-contact processing characteristics. Compared with traditional mechanical drilling, it can effectively avoid the problems of drill bit wear and frequent replacement, significantly optimizing processing efficiency and stability. In existing technologies, to achieve high-precision laser drilling of catheters, the precise spatial position of the catheter is usually obtained through a vision module, and then the image processor associates the preset processing image with the actual position of the catheter. Finally, the control system controls the laser to emit a laser beam to complete the processing. This method greatly improves the automation level and positional accuracy of the processing. At the same time, to reduce the thermal impact during processing, existing technologies mostly use ultrashort pulse lasers. By using the extremely short pulse duration, heat input is reduced, thereby reducing material melting and deformation to a certain extent and ensuring the structural integrity and performance of the medical catheter after processing. In patent application CN119175478B, a punching platform is included. A feed limiting tube for limiting the guide tube is fixed to the top of the punching platform. One end of the feed limiting tube has a semi-circular arc portion, and the guide tube contacts and engages with the inner wall of the feed limiting tube and the inner wall of the semi-circular arc portion. A cylindrical support rod for supporting the inner wall of the guide tube is placed inside the feed limiting tube. A magnet is fixed to one end of the cylindrical support rod. The punching platform has an installation groove, in which an energized coil is installed, and the energized coil engages with the magnet. A drive shaft and a driven shaft are rotatably connected inside the punching platform. A drive cam and a driven cam are fixed to the drive shaft and the driven shaft, respectively. Both the drive cam and the driven cam have arc-shaped grooves on their sidewalls for extruding the guide tube. A drive device for driving the drive shaft and the driven shaft to rotate is installed at the bottom of the punching platform, and a punching device is installed at the top of the punching platform. The advantages are: the cooperation of the active cam, the driven cam and the drive device realizes the periodic operation of the guide tube conveying and drilling, making the whole process more orderly and efficient. The guide tube is supported by the setting of magnets and cylindrical support rods, which not only facilitates periodic feeding and realizes equidistant drilling, but also makes the drilling accuracy more precise. The laser drilling component is automatically controlled to start through the setting of contact switches.

[0003] In the prior art including the aforementioned patents, firstly, the problems of heat-affected and oxidation have not been completely solved. Although ultrashort pulse lasers are called "cold processing", the heat accumulation effect still exists when performing high-density, porous processing on temperature-sensitive polymer materials such as medical catheters. The temperature rise in the processing area may cause irreversible thermal deformation of the material. More importantly, existing processing is usually carried out in an air environment. At high temperatures, the material is prone to oxidation reaction with oxygen in the air, resulting in yellowing and carbonization of the pore edges, which not only affects the appearance but may also introduce biocompatibility risks. Secondly, insufficient molten material removal capability. Some of the molten material generated during laser drilling is not effectively removed and easily re-adheres and solidifies at the orifice or the inner wall of the catheter, forming a so-called "recast layer" and burrs. These residues can alter the geometry and size of the hole. Smooth hole walls are crucial for ensuring fluid performance; for example, in vascular catheters, uneven orifices can increase resistance to blood flow or induce turbulence. Finally, existing gas protection methods are costly. Some technical solutions employ processing in an inert gas environment to isolate oxygen. However, this method requires long-term, high-flow-rate gas replacement of the entire processing chamber, resulting in high nitrogen consumption, high operating costs, and difficulty in meeting the demands of high-efficiency continuous automated production. Summary of the Invention

[0004] The problems to be solved by this invention are: thermal deformation and microcracks in materials caused by heat input; oxidation and carbonization of hole edges caused by processing in air; recast layer and burrs caused by incomplete removal of molten material; and the problems of high gas consumption and high cost of traditional overall inert gas protection methods.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a medical catheter laser drilling device for reducing material thermal deformation, comprising an air supply component disposed within the device body, characterized in that: the air supply component mainly comprises an installation cylinder, an air chamber, a connecting pipe, a guide bar, and an air nozzle; the installation cylinder has an air chamber inside; the installation cylinder has a connecting pipe inside; the connecting pipe has a guide bar slidably disposed inside; and the other end of the connecting pipe has an air nozzle fixedly disposed thereon. The device body has an internal mounting base, and clamps are provided on both sides of the upper end of the mounting base. The clamps are used to hold the conduit, and air supply components are provided on the outer sides of the clamps.

[0006] Preferably, the end of the connecting pipe is located at the end of the mounting cylinder near the clamp, the air chamber is located outside the end of the connecting pipe, the connecting pipe and the air nozzle are connected by bolts, and the air chamber is connected to an external air pipe through two pipes.

[0007] Preferably, the air supply assembly further includes a slide rail, which is disposed on one side of the clamp. There are two slide rails, and a mounting plate is disposed between the slide rails. The upper and lower ends of the mounting plate are provided with sliding sleeves that are connected to the slide rails. A mounting seat is disposed in the middle of the mounting plate, and a mounting cylinder is slidably disposed inside the mounting seat. The mounting seat is used to fix the mounting seat.

[0008] Preferably, the mounting base has sliding grooves on both sides for fixing with the mounting cylinder. The mounting cylinder has two bolts on both sides, which enter the sliding grooves after being screwed in.

[0009] Preferably, a spring is fixedly installed at one end of the connecting pipe away from the air chamber, and a magnet is fixedly installed at the other end of the spring. The magnet is used to fix the guide bar.

[0010] Preferably, the connecting tube has a through hole for connecting to the air pipe at one end near the spring. The through hole is made of metal and is clearance-fitted with the connecting tube. The inner diameter of the connecting tube is the same as the inner diameter of the air nozzle.

[0011] Preferably, a square hole is provided on the side where the air nozzle is connected to the connecting pipe, and a guide block is provided between the connection point of the connecting pipe and the air nozzle, and the guide block is fixedly connected to the connecting pipe.

[0012] Preferably, the guide block has two types of air ducts. The air ducts in the guide block can respectively send the gas in the air chamber to the air nozzle and the mounting cylinder. The gas sent to the air nozzle in the guide block directly enters the mounting cylinder, and the gas sent to the mounting cylinder in the guide block is discharged through the square hole.

[0013] Preferably, the mounting cylinder has a ventilation opening at one end near the air nozzle, and the ventilation groove of the mounting cylinder is formed around the air nozzle.

[0014] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) By setting up an air supply component with internal and external synchronous air supply function, the present invention can simultaneously blow inert gas (such as nitrogen) into the inside of the conduit and form a gas protective layer on the outer wall of the conduit when laser drilling the conduit, effectively isolating oxygen and preventing oxidation and carbonization of the hole edge. The internal airflow can also carry away the molten material in time, significantly reducing the formation of recast layer and burrs, and improving the hole wall quality and processing accuracy. The present invention adopts a modular and adjustable air supply structure. Through the cooperation of slide rail, mounting plate and sliding mounting cylinder, the position of the air nozzle can be flexibly adjusted. It is suitable for processing conduits of different lengths and diameters. With the replacement connecting pipe and air nozzle, the versatility and adaptability of the equipment are enhanced, and maintenance and replacement are convenient. (2) The present invention sets a spring and magnet in the connecting pipe to test the patency of the conduit before processing. The conduit is inserted into the conduit under air pressure and can be attracted and recovered by the magnet after the test is completed. This realizes the rapid judgment and self-recovery of the conduit state before processing, and improves the reliability and automation of the system. By setting two air channels in the guide block, the gas in the gas chamber is intelligently diverted. One channel is directly blown into the conduit for slag discharge and atmosphere protection, and the other channel is blown out from the air nozzle through the installation cylinder to form an outer wall air curtain. The internal and external channels work together to effectively control the heat-affected zone while greatly reducing the consumption of inert gas and saving operating costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the device of the present invention; Figure 3 This is a schematic diagram of the mounting base structure of the present invention; Figure 4 This is a partially enlarged structural diagram of the mounting base of the present invention; Figure 5 This is a cross-sectional view of the clamp and air delivery assembly of the present invention; Figure 6 This is a schematic diagram of the air delivery component structure of the present invention; Figure 7 This is a cross-sectional view of the mounting cylinder in the air supply assembly of the present invention; Figure 8 This is a schematic diagram of the internal structure of the connecting pipe of the present invention; Figure 9 This is a schematic diagram of the flow guide block structure of the present invention.

[0016] In the diagram: 1. Equipment body; 2. Mounting base; 3. Clamp; 4. Air supply assembly; 401. Slide rail; 402. Mounting plate; 403. Mounting seat; 404. Mounting cylinder; 405. Slide groove; 406. Air chamber; 407. Connecting pipe; 4071. Spring; 4072. Magnet; 4073. Passing bar; 408. Air nozzle; 4081. Square hole; 409. Guide block. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0018] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0019] like Figures 1 to 9 As shown, the present invention provides a medical catheter laser drilling device for reducing material thermal deformation, including an air supply component 4 disposed in the device body 1. The air supply component 4 mainly includes an installation cylinder 404, an air chamber 406, a connecting pipe 407, a guide bar 4073, and an air nozzle 408. An air chamber 406 is provided inside the installation cylinder 404. A connecting pipe 407 is disposed inside the installation cylinder 404. A guide bar 4073 is slidably disposed inside the connecting pipe 407. An air nozzle 408 is fixedly disposed at the other end of the connecting pipe 407. The device body 1 has an internal mounting base 2. Both sides of the upper end of the mounting base 2 are provided with clamps 3, which are used to hold the conduit. The outside of the clamps 3 are provided with air supply components 4.

[0020] The end of the connecting pipe 407 is located at the end of the mounting cylinder 404 near the clamp 3. The air chamber 406 is located outside the end of the connecting pipe 407. The connecting pipe 407 and the air nozzle 408 are connected by bolts. The air chamber 406 is connected to the external air pipe through two pipes.

[0021] The air supply assembly 4 also includes a slide rail 401, which is disposed on one side of the clamp 3. There are two slide rails 401, and a mounting plate 402 is disposed between the slide rails 401. The upper and lower ends of the mounting plate 402 are provided with sliding sleeves that are connected to the slide rails 401. A mounting seat 403 is disposed in the middle of the mounting plate 402. A mounting cylinder 404 is slidably disposed inside the mounting seat 403. The mounting seat 403 is used to fix the mounting seat 403.

[0022] The mounting base 403 has grooves 405 on both sides. The grooves 405 are used to fix the mounting cylinder 404. There are two bolts on both sides of the mounting cylinder 404. After the bolts are screwed in, they enter the grooves 405.

[0023] A spring 4071 is fixedly installed at one end of the connecting pipe 407 away from the air chamber 406, and a magnet 4072 is fixedly installed at the other end of the spring 4071. The magnet 4072 is used to fix the guide bar 4073.

[0024] The end of the connecting tube 407 near the spring 4071 has a through hole for connecting the air tube. The tube 4073 is made of metal and is clearance-fitted with the connecting tube 407. The inner diameter of the connecting tube 407 is the same as the inner diameter of the air nozzle 408.

[0025] A square hole 4081 is provided on the side where the air nozzle 408 is connected to the connecting pipe 407. A guide block 409 is provided between the connection point of the connecting pipe 407 and the air nozzle 408. The guide block 409 is fixedly connected to the connecting pipe 407.

[0026] The guide block 409 has two types of air ducts. The air ducts in the guide block 409 can send the gas in the air chamber 406 to the air nozzle 408 and the mounting cylinder 404 respectively. The gas sent from the guide block 409 to the air nozzle 408 directly enters the mounting cylinder 404, and the gas sent from the guide block 409 to the mounting cylinder 404 is discharged through the square hole 4081.

[0027] A ventilation opening is provided at one end of the mounting cylinder 404 near the air nozzle 408, and ventilation slots are provided around the air nozzle 408.

[0028] The working principle and usage process of this invention: There are two situations when processing the catheter: When processing short conduits, the air supply components 4 on both sides must first be moved to the same side of the clamp 3. Then, select a connecting pipe 407 and an air nozzle 408 of appropriate size and install them into the mounting cylinder 404. After the clamp 3 clamps and fixes the short tube, push the mounting cylinder 404 toward the clamp 3 until the air nozzle 408 is close to the outer wall of the short tube, and finally lock and fix the mounting cylinder 404 in this position. Before drilling, nitrogen gas is injected into the installation cylinder 404 through an external gas cylinder. The nitrogen pressure then pushes the probe 4073 into the short conduit. This step is used to check for blockages or deformation in the conduit. Once the probe 4073 has completely passed through the conduit, it enters the connecting pipe 407 on the other side and is attracted and captured by the magnet 4072 inside the pipe, completing the test. After the test of the purging strip 4073 is completed, the external gas cylinder switches the gas supply path and fills the gas chamber 406 with nitrogen. The nitrogen is then diverted by the guide block 409 and blown out from both the nozzle 408 and the mounting cylinder 404. The gas blown out by the 404 mounting cylinder flows along the outer wall of the duct, which can promptly blow away the fumes generated during the drilling process; The gas blown out by the 408 nozzle directly enters the inside of the conduit, maintaining a high-pressure gas environment inside the conduit. This allows the fumes and molten material generated during drilling to be discharged quickly, effectively reducing the probability of burrs appearing on the hole wall. Before processing the long conduit, simply move the air supply component 4 on the feeding side to the designated side and complete the assembly and installation of the connecting pipe 407, the air nozzle 408 and the mounting cylinder 404.

[0029] Before drilling, first control the clamp 3 at the feeding end to clamp and tighten the long guide tube to ensure its stable position. Then, the external gas cylinder can be started for air blowing. Special note: When processing the long guide tube, it is not necessary to start the purging bar 4073 for inspection; you can directly proceed to the drilling auxiliary air blowing stage.

[0030] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A medical catheter laser drilling device for reducing material thermal deformation, comprising an air delivery assembly (4) disposed within the device body (1), characterized in that: The air supply assembly (4) mainly includes an installation cylinder (404), an air chamber (406), a connecting pipe (407), a guide bar (4073), and an air nozzle (408). The installation cylinder (404) has an air chamber (406) inside. The installation cylinder (404) has a connecting pipe (407) inside. The guide bar (4073) is slidably arranged inside the connecting pipe (407). The other end of the connecting pipe (407) is fixedly provided with an air nozzle (408). The device body (1) is provided with an installation base (2) inside. The upper ends of the installation base (2) are provided with clamps (3) on both sides. The clamps (3) are used to hold the conduit. The outer sides of the clamps (3) are provided with air supply components (4).

2. The medical catheter laser drilling device for reducing material thermal deformation according to claim 1, characterized in that: The end of the connecting pipe (407) is located at the end of the mounting cylinder (404) near the clamp (3). The air chamber (406) is located outside the end of the connecting pipe (407). The connecting pipe (407) and the air nozzle (408) are connected by bolts. The air chamber (406) is connected to the external air pipe through two pipes.

3. The medical catheter laser drilling device for reducing material thermal deformation according to claim 1, characterized in that: The air supply assembly (4) also includes a slide rail (401), which is disposed on one side of the clamp (3). There are two slide rails (401), and a mounting plate (402) is disposed between the slide rails (401). The upper and lower ends of the mounting plate (402) are provided with sliding sleeves connected to the slide rails (401). A mounting seat (403) is disposed in the middle of the mounting plate (402). A mounting cylinder (404) is slidably disposed inside the mounting seat (403). The mounting seat (403) is used to fix the mounting seat (403).

4. The medical catheter laser drilling device for reducing material thermal deformation according to claim 3, characterized in that: The mounting base (403) has sliding grooves (405) on both sides. The sliding grooves (405) are used to fix the mounting cylinder (404). Two bolts are provided on both sides of the mounting cylinder (404). After the bolts are screwed in, they enter the sliding grooves (405).

5. The medical catheter laser drilling device for reducing material thermal deformation according to claim 1, characterized in that: A spring (4071) is fixedly installed at one end of the connecting pipe (407) away from the air chamber (406), and a magnet (4072) is fixedly installed at the other end of the spring (4071). The magnet (4072) is used to fix the guide bar (4073).

6. The medical catheter laser drilling device for reducing material thermal deformation according to claim 5, characterized in that: The connecting tube (407) has a through hole for connecting the air pipe at one end near the spring (4071). The through bar (4073) is made of metal. The through bar (4073) and the connecting tube (407) are fitted with a clearance. The inner diameter of the connecting tube (407) is the same as the inner diameter of the air nozzle (408).

7. A medical catheter laser drilling device for reducing material thermal deformation according to claim 6, characterized in that: A square hole (4081) is provided on the side where the air nozzle (408) is connected to the connecting pipe (407). A guide block (409) is provided between the connection point of the connecting pipe (407) and the air nozzle (408). The guide block (409) is fixedly connected to the connecting pipe (407).

8. A medical catheter laser drilling device for reducing material thermal deformation according to claim 7, characterized in that: The guide block (409) has two types of air ducts. The air ducts in the guide block (409) can send the gas in the air chamber (406) to the air nozzle (408) and the mounting cylinder (404) respectively. The gas sent from the guide block (409) to the air nozzle (408) directly enters the mounting cylinder (404), and the gas sent from the guide block (409) to the mounting cylinder (404) is discharged through the square hole (4081).

9. A medical catheter laser drilling device for reducing material thermal deformation according to claim 8, characterized in that: The mounting cylinder (404) has a ventilation opening at one end near the air nozzle (408), and the ventilation groove of the mounting cylinder (404) is opened around the air nozzle (408).

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