CN217316403U

CN217316403U - Be used for medical catheter seal wire terminal surface balling to seal welded device

Info

Publication number: CN217316403U
Application number: CN202220469046.8U
Authority: CN
Inventors: 杨田; 程英; 胡俊; 胡张薇; 王建刚
Original assignee: Wuhan Huagong Laser Engineering Co Ltd
Current assignee: Wuhan Huagong Laser Engineering Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-30
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a device for spheroidizing, sealing and welding the end face of a guide wire of a medical catheter, which comprises a control system, a laser, a transmission optical fiber, a laser optical path system, a motion module, a CCD imaging module and a coaxial air nozzle; the control system is respectively connected with the laser and the motion module; the output end of the laser is connected with the input end of the transmission optical fiber; the laser light path system comprises an optical fiber connector, a collimating mirror, a 45-degree turn-back mirror and a focusing mirror, wherein the optical fiber connector, the collimating mirror, the 45-degree turn-back mirror and the focusing mirror are arranged along a light path, the optical fiber connector is connected with the output end of a transmission optical fiber, the 45-degree turn-back mirror is connected with the CCD imaging module, and the focusing mirror is connected with a coaxial air faucet. The utility model discloses can effectively seal and satisfy ball-type welded joint, the demand that the outward appearance does not have the heterochrosis to medical catheter seal wire terminal surface, realize high-efficient mass production.

Description

Be used for medical catheter seal wire terminal surface balling to seal welded device

Technical Field

The utility model relates to a laser welding field, concretely relates to be used for medical catheter seal wire terminal surface balling to seal welded device.

Background

As a high-added-value medical appliance catheter guide wire, the guide wire is one of main tools for skin puncture or intubation, and the guide wire plays a role in guiding and supporting a catheter. Most medical catheter guide wires in the market adopt a plasma welding technology to carry out end face sealing ball welding. Plasma welding belongs to the contact welding mode, and when being used for medical catheter seal wire terminal surface to seal ball-type welding, in order to guarantee that the outward appearance shaping of sample is pleasing to the eye, plasma welding syringe needle and the tool that possesses auxiliary forming and clamping function need regularly be changed, and welding syringe needle and tool consumption are big, are unfavorable for mass production.

Through retrieval, china with publication number CN214161763U, exclusively in 2021, 9/10, discloses a laser welding system, which includes a laser, a transmission fiber, a laser optical path system, a control module, and a motion module. The laser is used for outputting a continuous or pulse laser beam; the transmission optical fiber is used for transmitting the laser beam to the laser optical path system; the laser optical path system comprises an F-Theta field lens and is used for focusing the laser beam to a workpiece to be welded through the F-Theta field lens; the motion module is used for loading the workpieces to be welded; the control module is used for controlling the laser to output the laser beam and controlling the movement of the motion module.

Because the sealing and spheroidizing welding of the end face of the guide wire of the guide pipe needs to add a coaxial protective gas device for appearance protection and spherical forming, and laser beams must be vertically incident on the end face of the guide wire of the guide pipe for welding, after the coaxial protective gas device is added to the F-theta field lens in the scheme, the size of a coaxial protective gas nozzle is limited to be small, a scanning vibrating lens cannot play a role in guiding the laser beams to deflect quickly, and the scanning vibrating lens can lead the laser beams to be obliquely incident on the end face of the guide wire of the guide pipe after deflecting the laser beams, so that the spherical forming of the end face of the seal is not facilitated. Therefore, a laser welding system is needed to be designed, the end face of the guide wire of the medical catheter is effectively sealed, the requirements of a spherical full welding joint and no heterochromous appearance are met, the traditional plasma welding is finally replaced, and efficient batch production is realized.

Disclosure of Invention

For overcoming the not enough of above-mentioned prior art, the utility model provides a be used for medical treatment pipe seal wire terminal surface balling to seal welded device for effectively seal the medical treatment pipe seal wire, in order to satisfy the full welded joint of pipe seal wire ball-type, the outward appearance does not have the demand of heterochrosis.

The utility model discloses a realize through following technical scheme:

a device for spheroidizing, sealing and welding the end face of a guide wire of a medical catheter comprises a control system, a laser, a transmission optical fiber, a laser optical path system, a motion module, a CCD imaging module and a coaxial air nozzle; the control system is respectively connected with the laser and the motion module; the output end of the laser is connected with the input end of the transmission optical fiber; the laser light path system comprises an optical fiber connector, a collimating mirror, a 45-degree turn-back mirror and a focusing mirror, wherein the optical fiber connector, the collimating mirror, the 45-degree turn-back mirror and the focusing mirror are arranged along a light path, the optical fiber connector is connected with the output end of a transmission optical fiber, the 45-degree turn-back mirror is connected with the CCD imaging module, and the focusing mirror is connected with a coaxial air faucet.

In the scheme, laser output by the laser is transmitted to the laser light path system through the transmission optical fiber, the collimating mirror converts the laser into parallel beams, the parallel beams are further transmitted to the 45-degree turn-back mirror and the focusing mirror, and the focusing mirror focuses the parallel beams on a workpiece to be processed, so that the workpiece to be processed is welded.

The CCD imaging module images and amplifies the welding area, the position of a workpiece to be welded can be accurately adjusted through the CCD imaging module, and the deviation of the welding position caused by the fact that a laser beam and a guide wire of the catheter are not coaxial is prevented, so that the welding quality is reduced; meanwhile, the working personnel can judge the welding quality according to the image after welding; the coaxial air nozzle can protect the appearance of a welding workpiece and assist in spherical surface forming of a welding end face.

Specifically, the 45 ° turning mirror is a half-transmitting half-reflecting mirror, and when the laser beam is transmitted to the 45 ° turning mirror, the laser beam is reflected (or transmitted) to the focusing mirror; visible light reflected back from the welding area is transmitted (or reflected) into the CCD imaging module.

The control system comprises external control software, a laser control card, a motion control card and an industrial personal computer, wherein the external control software is used for drawing a welding graph and setting welding parameters of a laser; the industrial personal computer is used for issuing welding patterns and laser welding parameters to the laser control card and the motion control card; the laser control card is used for sending signals to the laser, and the motion control card is used for sending signals to the motion module.

Specifically, the motion module comprises a servo motor, a screw rod and a sliding block, the servo motor is used for driving the screw rod to move, the screw rod drives the sliding block to move in two dimensions or three dimensions, and the sliding block is used for fixing a workpiece to be processed. The servo motor has the advantage of accurate control, so that the movement of the workpiece to be processed is more accurate, and the processing accuracy is improved.

Specifically, the core diameter of the transmission fiber is 100-300 μm.

Specifically, the focal length of the collimating mirror is F100 mm-F150 mm, so that the problem that the diameter of a light beam passing through the collimating mirror is too large or too small, the laser beam passing through the collimating mirror cannot be received by a focusing lens, the laser beam cannot be completely focused, or the size of a formed welding spot is too large, and the welding quality is influenced is avoided.

Specifically, the focal length of the focusing mirror is F150 mm-F250 mm, so that the welding efficiency and quality are prevented from being influenced by overlarge or undersize welding spots formed by the focusing mirror.

Furthermore, the light beam output by the laser is a flat-top light beam, the laser energy distribution uniformity at each position on the end face of the flat-top light beam is high, and the improvement of the welding quality of the spherical welding head is facilitated.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a pair of be used for medical treatment pipe seal wire terminal surface balling to seal welded device, control system control laser instrument launches the flat top light beam, and the flat top light beam is via transmission optical fiber transmission to collimating mirror, and the collimating mirror converts laser to parallel light beam, then transmits to the focusing mirror via 45 reflection of the mirror of turning back, and the focusing mirror focuses on the pipe seal wire terminal surface with laser beam perpendicularly to weld the product under coaxial air cock and motion module's cooperation.

The utility model discloses a CCD imaging module is imaged and is enlargied welding area, prevents that the welding position that laser beam and pipe seal wire disalignment lead to is skew to ensure pipe seal wire welding quality, reach and effectively seal and satisfy ball-type welded joint, the outward appearance does not have the demand of heterochrosis to medical catheter seal wire terminal surface, realize high-efficient mass production.

Drawings

Fig. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a control system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a motion module according to an embodiment of the present invention.

In the figure: 1. a control system; 101. external control software; 102. an industrial personal computer; 103. a laser control card; 104. a motion control card; 2. a laser; 3. a transmission optical fiber; 4. a laser optical path system; 401. an optical fiber splice; 402. a collimating mirror; 403. a 45-degree fold-back mirror; 404. a focusing mirror; 5. a coaxial air tap; 6. a motion module; 601. a servo motor; 602. a screw rod; 603. a slider; 7. and a CCD imaging module.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, the utility model provides a device for medical catheter seal wire terminal surface balling seal welding, including control system 1 and along laser 2, transmission fiber 3, laser optical path system 4 and the motion module 6 of light path setting.

The light beam output by the laser 2 is a flat-top light beam of 1000nm-1100 nm. The core diameter of the transmission fiber 3 is 100-300 μm.

As shown in fig. 2, the control system 1 includes an external control software 101, an industrial personal computer 102, a laser control card 103, and a motion control card 104, where the external control software 101 is used to draw a welding pattern and set welding parameters; the industrial personal computer 102 is used for issuing welding patterns and welding parameters to the laser control card 103 and the motion control card 104; the laser control card 103 is configured to issue a signal to the laser 2, and the motion control card 104 issues a signal to the motion module 6.

The laser light path system 4 comprises an optical fiber connector 401, a collimating mirror 402, a 45 ° turning mirror 403 and a focusing mirror 404, which are arranged along a light path, wherein the 45 ° turning mirror 403 is used for transmitting visible light and reflecting laser (or transmitting laser and reflecting visible light); the focal length of the collimating mirror 402 is F100 mm-F150 mm, and the focal length of the focusing mirror 404 is F150 mm-F250 mm.

The 45-degree turn-back mirror 403 is connected with a CCD imaging module 7, the CCD imaging module 7 is used for imaging and amplifying a welding area, the position of a workpiece to be welded can be accurately adjusted through the CCD imaging module 7, and the deviation of a welding position caused by the fact that a laser beam and a catheter guide wire are not coaxial is prevented, so that the welding quality is reduced; meanwhile, the working personnel can judge the welding quality according to the image after welding. The focusing mirror 404 is connected with a coaxial air tap 5, and the coaxial air tap 5 is connected with the focusing mirror 404 through threads; the coaxial air nozzle 5 can be connected with protective gas and is used for protecting the appearance of a welded workpiece and assisting in spherical surface forming of a welded end face.

As shown in fig. 3, the moving module 6 includes a servo motor 601, a lead screw 602, and a slider 603, where the servo motor 601 is used to drive the lead screw 602 to move, the lead screw 602 drives the slider 603 to perform two-dimensional or three-dimensional movement, and the slider 603 is used to fix a workpiece to be processed.

Example 1

In the embodiment, a nickel-titanium alloy guide wire with the diameter of 0.25mm is taken as an example of a stainless steel medical catheter connecting core with the outer diameter of 0.9mm and the inner diameter of 0.4mm, the end face is required to be effectively sealed, a spherical full welding joint is met, and the appearance is free from color difference.

In this embodiment, a 300W quasi-continuous laser is adopted, the laser wavelength is required to be 1064nm, the laser output mode is a pulse mode, the peak power is 600W, the pulse width is 5ms, the light is emitted twice, and the two times are 500 ms. And inputting the parameters into external control software of the control system, transmitting the parameter command to the industrial personal computer by the external control software, and further transmitting the parameter command to the laser control card, wherein the laser control card controls the laser to output laser beams according to the parameters.

In the embodiment, the diameter of the core of the transmission optical fiber is 100 micrometers, the focal length of the collimating lens is F100mm, the focal length of the focusing lens is F250mm, and the focusing lens is provided with a coaxial blowing device and is protected by argon blowing. The workpiece to be welded is fixed on the motion module, and the position of the workpiece to be welded is accurately adjusted by using the CCD imaging module, so that the laser beam and the guide wire of the catheter are coaxial.

The laser device outputs laser beams according to preset parameters, the laser beams are transmitted to the collimating mirror through the transmission optical fiber, the incident lasers are shaped into parallel beams through the collimating mirror, the parallel beams are transmitted to the focusing mirror through reflection of the 45-degree turn-back mirror, the focusing mirror focuses the laser beams onto the surface of a workpiece to be welded, a proper focusing light spot is formed, and the workpiece to be welded is welded under the cooperation of the moving module.

The welding effect is as follows: the guide tube and the guide wire are effectively sealed, the welding joint is spherical and full, the appearance has no obvious color, and the welding requirement is met.

Example 2

In the present embodiment, a stainless steel guide wire having an outer diameter of 1.0mm and an inner diameter of 0.55mm and a stainless steel medical catheter connecting core diameter of 0.30mm is taken as an example.

In this embodiment, a 150W quasi-continuous laser is adopted, the laser wavelength is 1064nm, the laser beam output mode of the laser is a pulse mode, the peak power is 650W, the pulse width is 6ms, light is emitted twice, and the time interval between two light-emitting times is 500 ms. And inputting the parameters into external control software of the control system, transmitting the parameter command to the industrial personal computer by the external control software, and further transmitting the parameter command to the laser control card, wherein the laser control card controls the laser to output laser beams according to the parameters.

The diameter of the optical fiber core is 200 mu m, the focal length of the collimating mirror is F100mm, the focal length of the focusing mirror is F150mm, a coaxial blowing device is arranged, nitrogen gas blowing protection is carried out, and when a workpiece to be welded is fixed on the motion module, the position of the workpiece to be welded is accurately adjusted by using the CCD imaging module, so that the laser beam and the guide wire of the guide pipe are coaxial.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the essence of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A device for spheroidizing, sealing and welding the end face of a guide wire of a medical catheter is characterized by comprising a control system, a laser, a transmission optical fiber, a laser optical path system, a motion module, a CCD imaging module and a coaxial air tap; the control system is respectively connected with the laser and the motion module; the output end of the laser is connected with the input end of the transmission optical fiber; the laser light path system comprises an optical fiber connector, a collimating mirror, a 45-degree turn-back mirror and a focusing mirror, wherein the optical fiber connector, the collimating mirror, the 45-degree turn-back mirror and the focusing mirror are arranged along a light path, the optical fiber connector is connected with the output end of a transmission optical fiber, the 45-degree turn-back mirror is connected with the CCD imaging module, and the focusing mirror is connected with a coaxial air faucet.

2. The device for medical catheter guidewire end face spheroidizing seal welding according to claim 1, wherein the 45 ° reflex mirror is a half-mirror.

3. The device for welding the spheroidizing seal of the guide wire end face of the medical catheter according to claim 1, wherein the control system comprises external control software, a laser control card, a motion control card and an industrial personal computer, and the external control software is used for drawing a welding figure and setting welding parameters of a laser; the industrial personal computer is used for issuing welding patterns and laser welding parameters to the laser control card and the motion control card; the laser control card is used for sending signals to the laser, and the motion control card is used for sending signals to the motion module.

4. The device for the spheroidizing seal welding of the end face of the guide wire of the medical catheter according to claim 1, wherein the moving module comprises a servo motor, a screw rod and a slide block, the servo motor is used for driving the screw rod to move, the screw rod drives the slide block to move in two dimensions or three dimensions, and the slide block is used for fixing a workpiece to be processed.

5. The device for spheroidized seal welding of the end face of the guide wire of the medical catheter as claimed in claim 1, wherein the core diameter of the transmission optical fiber is 100-300 μm.

6. The device for medical catheter guidewire end face spheroidizing seal welding according to claim 1, wherein the focal length of the collimating mirror is F100 mm-F150 mm.

7. The device for medical catheter guide wire end face spheroidizing seal welding according to claim 1, wherein the focal length of the focusing mirror is F150 mm-F250 mm.

8. The apparatus according to claim 1, wherein the laser outputs a flat-top beam.