CN111069769A - Laser processing method of metal inner tube of guide catheter - Google Patents
Laser processing method of metal inner tube of guide catheter Download PDFInfo
- Publication number
- CN111069769A CN111069769A CN201911401210.0A CN201911401210A CN111069769A CN 111069769 A CN111069769 A CN 111069769A CN 201911401210 A CN201911401210 A CN 201911401210A CN 111069769 A CN111069769 A CN 111069769A
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- Prior art keywords
- laser
- metal
- inner tube
- cutting
- welding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
Abstract
The invention discloses a laser processing method of a metal inner tube of a guide catheter, which comprises the following steps: (1) preassembling a metal inner tube such as a metal braided inner tube or a spring-wound coil of a guide catheter, (2) laser cutting the wire, and (3) laser welding the wire. The method utilizes the optical fiber to carry out laser energy transmission welding technology to carry out precise processing on the silk threads at two ends of the metal braided inner tube or the spring-wound spiral inner tube of the micro catheter: the laser cutting and laser welding of the metal wires at two ends are included, so that the metal wire cuts are smooth and uniform, and the thickness and size precision after welding is high.
Description
Technical Field
The invention belongs to the technical field of laser processing, and particularly relates to a laser processing method of a metal inner tube of a guide catheter.
Background
Vascular interventional catheters are generally composed of a polymeric outer tube, a metal braided tube or a coiled spring coil tube, an inner liner, and the like. After the metal inner tube is woven or wound, the metal wires are generally cut off by special industrial scissors, and then the metal wires at the two ends of the mouth are bonded by UV glue under the irradiation of ultraviolet. For the catheter with low requirement on the outer diameter precision, the method can directly process the ending parts at the two ends and then sleeve the developing ring, and the processing process is not influenced.
However, this method is not suitable for processing the metal inner tube of the micro-catheter with the outer diameter of 0.57mm-0.93mm and the inner diameter of 0.36-0.69 mm. The precision requirements of the inner diameter and the outer diameter of the micro-catheter are high, and if a common industrial scissors is used for cutting off the metal wire, the buckling deformation of a fracture part is likely to be caused; when UV glue is used for ultraviolet curing, if the glue amount is too much, the control is not accurate, the thickness of the closed part at the two ends is very easy to be too large, the matching precision of the whole outer diameter of the inner tube of the micro-catheter and the inner diameter of the developing ring is extremely high, the assembly of the developing ring can be influenced, the condition that the inner tube or the spiral ring tube cannot be sleeved in the inner tube or the spiral ring tube is caused, the material waste is caused, and the product rejection rate is increased.
Disclosure of Invention
The invention aims to precisely process the silk threads at two ends of a metal braided inner tube or a spring-wound spiral inner tube of a micro catheter by utilizing an optical fiber laser energy transmission welding technology: the laser cutting and laser welding of the metal wires at two ends are included, so that the metal wire cuts are smooth and uniform, and the thickness and size precision after welding is high.
The method specifically comprises the following steps: 1. a laser processing method of a metal inner tube of a guide catheter is characterized by comprising the following steps:
(1) preassembly of the inner metal tube of the guide catheter: after the metal inner tube or the spring winding coil is woven on the inner liner, the metal woven inner tube or the spring winding coil and the inner liner are fixed on a mandrel tool, the metal woven inner tube or the spring winding coil and the inner liner are observed by means of a microscope with the power of more than 20 times, a polytetrafluoroethylene winding belt is tightly wrapped on the metal inner tube by using tweezers, and only the part needing laser cutting or laser spot welding is exposed;
(2) laser cutting of metal wire
(2.1) starting a laser welding machine workbench and a laser generator, after the preheating of the equipment is finished, placing the metal inner pipe with the lining and the tool at the corresponding position of the workbench, and observing the tool and the part to be processed in a display screen on the right side of the workbench; starting laser welding software for standby; clicking a main brake in a control option on a control display screen of the laser welding machine to switch to an open state;
(2.2) determining the laser cutting process parameters: clicking a 'waveform' option on a display screen of a laser welding machine, calling parameters from 'waveform number 1' to 'waveform number X' in the 'waveform' option according to the material, shape and specification of the current woven or coiled spring metal, and clicking 'loading waveforms'. The maximum power of the laser is adjusted to 0.4-0.5kw, and the cutting of the metal wire with the size in the thickness direction by the fiber laser can be completed by controlling the laser energy to 0.40-0.70J;
(2.3) determining the laser cutting position: the clear and definite cutting position is determined by adopting a 304 stainless steel rectangular flat wire: determining the zoom multiple of a three-axis motion unit in an X, Y, Z axis in computer software, and manually adjusting a coordinate change-over switch of a working table top and an electronic hand wheel to realize accurate focusing of a cross cursor on a display screen to a laser cutting position;
(2.4) preblowing protective gas: starting a GAS button, and continuously pre-blowing argon GAS to the focused cutting position until the pre-cutting position is stable and free of shaking;
(2.5) laser cutting: and (3) determining that the pre-cutting position in the step 2.4 is stable and does not shake, and clicking a 'cutting' button in a computer control system to start laser cutting until the metal wire laser cutting operation is completed.
(3) Laser welding wire
When the metal wire is subjected to laser welding, the maximum power of the laser is adjusted to 0.2-0.3kw, the laser energy is controlled to 0.20-0.30J, and the welding of the metal wire with the size in the thickness direction by the optical fiber laser can be finished, and the operation steps are consistent with the laser cutting method.
Further, the parameters of laser cutting in the step (2) are that the optimal maximum power is 0.5kw, and the laser energy is controlled to be 0.65J;
further, in the step (2), the energy correction time is 0.4 +/-0.1 ms, and the power percentage is controlled to be 93 +/-5%;
the energy output time is controlled to be 1.1 plus or minus 0.3ms, and the power percentage is 88 plus or minus 5 percent;
in the step (3), the parameters of laser welding are that the maximum power is 0.3kw, and the laser energy is controlled to be 0.25 +/-0.04J;
the energy correction time is 0.3ms, and the power percentage is controlled to be 75 +/-1%;
the energy output time is controlled to be 1 +/-0.2 ms, and the power percentage is 65 +/-1%.
Compared with the prior art, the invention has the advantages that:
1. the lamp pump solid laser welding machine which uses the optical fiber to transmit laser energy precisely cuts the silk threads (the metal wires with the width of 0.076mm and the thickness of 0.013 mm) at two ends of the metal braided inner tube or the spiral inner tube of the wound spring of the micro catheter, replaces the cutting of a common industrial scissors, and ensures that the cut is neat and uniform.
2. The optical fiber laser is used for laser welding the metal wires at the two ends in the thickness direction to replace UV glue curing bonding or instant glue bonding, so that other substances are not introduced to influence the whole thickness of the sealed metal wires, and the firmness and integration formed by laser welding are favorable for assembling the high-precision developing ring, and the product yield is improved.
Detailed Description
Equipment and materials required
Lamp pumping solid laser welding machine, metal woven inner tube or wound spring coil (nickel-titanium alloy or stainless steel material), mandrel tool, tweezers, microscope and polytetrafluoroethylene winding belt
A laser processing method of metal knitting and spring winding coils is characterized by comprising the following steps:
(1) preassembling a metal inner tube of a guide catheter, wherein the metal inner tube of the guide catheter is provided with a braided inner tube or a spring-wound spiral coil and the like, and the preassembling method comprises the following steps: : after the metal inner tube or the spring winding coil is woven on the inner liner, the metal woven inner tube or the spring winding coil and the inner liner are fixed on a mandrel tool, the metal woven inner tube or the spring winding coil and the inner liner are observed by means of a microscope with the power of more than 20 times, a polytetrafluoroethylene winding belt is tightly wrapped on the metal inner tube by using tweezers, and only the part needing laser cutting or laser spot welding is exposed;
(2) laser cutting of metal wire
(2.1) starting a laser welding machine workbench and a laser generator, after the preheating of the equipment is finished, placing the metal inner pipe with the lining and the tool at the corresponding position of the workbench, and observing the tool and the part to be processed in a display screen on the right side of the workbench; starting laser welding software for standby; clicking a main brake in a control option on a control display screen of the laser welding machine to switch to an open state;
(2.2) clicking a 'waveform' option on a display screen of the laser welding machine, calling parameters from 'waveform number 1' to 'waveform number X' in the 'waveform' option according to the material, shape and specification of the current woven or wound spring metal, and clicking 'loading waveform'.
(2.3) determining the spot welding process parameters, as shown in the table 1, determining the spot welding process parameters, as shown in the following table, determining a clear and definite welding position by using the following operations for 304 stainless steel rectangular flat wires: the zoom multiple (1, 2, 5 and 10 times of four zoom speeds can be selected, and 2 times is generally defaulted) of the cursor X, Y, Z shaft is firstly determined at the upper right corner in computer software, and the coordinate change-over switch at the left lower side and the electronic hand wheel at the right lower side of the working table surface are manually adjusted, so that the accurate focusing of the cross cursor on the display screen to the laser welding position is realized.
TABLE 1
(2.4) starting a 'GAS' button in computer software, and continuously pre-blowing argon GAS to the focused welding position until the welding position is stable and does not shake;
and (2.5) determining that the welding position in the step 4 is stable and does not shake, and clicking a spot welding button in a computer control system to start spot welding until the metal wire laser cutting operation is completed.
(3) Laser welding wire
When the metal wire is subjected to laser welding, the maximum power of the laser is adjusted to 0.2-0.3kw, and the laser energy is controlled to 0.20-0.30J, so that the metal wire with the size can be welded by the optical fiber laser in the thickness direction;
when two ends of a 2 x 2 diamond weaving pattern or a 3 x 3 three-way weaving pattern are welded, branched metal wires need to be welded and fixed at the thickness part in the whole circumferential direction, the thickness of the diamond weaving welding part is less than or equal to 2 times of the thickness of the metal wires, and the thickness of the three-way weaving welding part is less than or equal to 3 times of the thickness of the metal wires. When the two ends of the spiral coil of the spring winding are welded, the two-end closing parts of the spiral coil can be directly closed after laser spot welding, and the stable forming of the spiral coil is ensured.
The processing technology is suitable for round, square, rectangular or trapezoidal metal wires and is made of nickel-titanium alloy or stainless steel. The processing technology has the advantages that under the condition of set energy parameters, laser cutting or laser spot welding has no influence on an inner liner (polytetrafluoroethylene) of the catheter, only acts with metal braided wires, and is high in reliability and stability.
Further, the parameters of laser cutting in the step (2) are that the optimal maximum power is 0.5kw, and the laser energy is controlled to be 0.65J;
further, in the step (2), the energy correction time is 0.4 +/-0.1 ms, and the power percentage is controlled to be 93 +/-5%;
the energy output time is controlled to be 1.1 plus or minus 0.3ms, and the power percentage is 88 plus or minus 5 percent;
in the step (3), the parameters of laser welding are that the maximum power is 0.3kw, and the laser energy is controlled to be 0.25 +/-0.04J;
the energy correction time is 0.3ms, and the power percentage is controlled to be 75 +/-1%;
the energy output time is controlled to be 1 +/-0.2 ms, and the power percentage is 65 +/-1%.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that various modifications and equivalent arrangements can be made within the spirit and scope of the present invention without departing from the spirit and scope thereof.
Claims (3)
1. A laser processing method of a metal inner tube of a guide catheter is characterized by comprising the following steps:
(1) preassembly of the inner metal tube of the guide catheter: after the metal inner tube or the spring winding coil is woven on the inner liner, the metal woven inner tube or the spring winding coil and the inner liner are fixed on a mandrel tool, the metal woven inner tube or the spring winding coil and the inner liner are observed by means of a microscope with the power of more than 20 times, a polytetrafluoroethylene winding belt is tightly wrapped on the metal inner tube by using tweezers, and only the part needing laser cutting or laser spot welding is exposed;
(2) laser cutting of metal wire
(2.1) starting a laser welding machine workbench and a laser generator, after the preheating of the equipment is finished, placing the metal inner pipe with the lining and the tool at the corresponding position of the workbench, and observing the tool and the part to be processed in a display screen on the right side of the workbench; starting laser welding software for standby; clicking a main brake in a control option on a control display screen of the laser welding machine to switch to an open state;
(2.2) determining the laser cutting process parameters: clicking a 'waveform' option on a display screen of a laser welding machine, calling parameters from 'waveform number 1' to 'waveform number X' in the 'waveform' option according to the material, shape and specification of the current woven or coiled spring metal, and clicking 'loading waveforms'. The maximum power of the laser is adjusted to 0.4-0.5kw, and the cutting of the metal wire with the size in the thickness direction by the fiber laser can be completed by controlling the laser energy to 0.40-0.70J;
(2.3) determining the laser cutting position: the clear and definite cutting position is determined by adopting a 304 stainless steel rectangular flat wire: determining the zoom multiple of a three-axis motion unit in an X, Y, Z axis in computer software, and manually adjusting a coordinate change-over switch of a working table top and an electronic hand wheel to realize accurate focusing of a cross cursor on a display screen to a laser cutting position;
(2.4) preblowing protective gas: starting a GAS button, and continuously pre-blowing argon GAS to the focused cutting position until the pre-cutting position is stable and free of shaking;
(2.5) laser cutting: and (3) determining that the pre-cutting position in the step 2.4 is stable and does not shake, and clicking a 'cutting' button in a computer control system to start laser cutting until the metal wire laser cutting operation is completed.
(3) Laser welding wire
When the metal wire is subjected to laser welding, the maximum power of the laser is adjusted to 0.2-0.3kw, the laser energy is controlled to 0.20-0.30J, and the welding of the metal wire with the size in the thickness direction by the optical fiber laser can be finished, and the operation steps are consistent with the laser cutting method.
2. The laser machining method for a metal inner tube of a guide catheter according to claim 1,
in the step (2), the laser cutting parameters are that the optimal maximum power is 0.5kw, and the laser energy is controlled at 0.65J.
3. The laser machining method for a metal inner tube of a guide catheter according to claim 1,
in the step (2), the energy correction time is 0.4 +/-0.1 ms, and the power percentage is controlled to be 93 +/-5%;
the energy output time is controlled to be 1.1 plus or minus 0.3ms, and the power percentage is 88 plus or minus 5 percent;
in the step (3), the parameters of laser welding are that the maximum power is 0.3kw, and the laser energy is controlled to be 0.25 +/-0.04J;
the energy correction time is 0.3ms, and the power percentage is controlled to be 75 +/-1%;
the energy output time is controlled to be 1 +/-0.2 ms, and the power percentage is 65 +/-1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911401210.0A CN111069769B (en) | 2019-12-31 | 2019-12-31 | Laser processing method of metal inner tube of guide catheter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911401210.0A CN111069769B (en) | 2019-12-31 | 2019-12-31 | Laser processing method of metal inner tube of guide catheter |
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| CN111069769A true CN111069769A (en) | 2020-04-28 |
| CN111069769B CN111069769B (en) | 2022-02-25 |
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|---|---|---|---|---|
| US6465758B1 (en) * | 1999-11-17 | 2002-10-15 | Advanced Cardiovascular Systems, Inc. | Laser assisted wire end forming process |
| JP2005230318A (en) * | 2004-02-20 | 2005-09-02 | Miyachi Technos Corp | Method for working catheter |
| CN201102127Y (en) * | 2007-12-07 | 2008-08-20 | 北京工业大学 | Laser three-dimensional accurate cutting system of metallic tubule |
| CN201596850U (en) * | 2009-09-11 | 2010-10-06 | 华南师范大学 | Optical fiber laser micro-processing system for cutting stents inside blood vessels |
| CN102139415A (en) * | 2011-04-01 | 2011-08-03 | 北京建筑工程学院 | Vascular stent cutting device and vascular stent cutting method |
| CN102657563A (en) * | 2012-05-18 | 2012-09-12 | 上海理工大学 | Bracket positioning device for interventional treatment of vascular opening diseases |
| CN202506974U (en) * | 2012-01-19 | 2012-10-31 | 昆山思拓机器有限公司 | Laser processing device for intravascular stent |
| US20130153542A1 (en) * | 2009-12-22 | 2013-06-20 | W. C. Heraeus Gmbh | Method of joining dissimilar materials |
| CN106825945A (en) * | 2017-03-15 | 2017-06-13 | 山东吉威医疗制品有限公司 | A kind of cutting technique of angiocarpy bracket |
| CN108213704A (en) * | 2017-12-26 | 2018-06-29 | 太原理工大学 | Utilize the method for ultra-short pulse laser manufacture human body implantation stent |
-
2019
- 2019-12-31 CN CN201911401210.0A patent/CN111069769B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6465758B1 (en) * | 1999-11-17 | 2002-10-15 | Advanced Cardiovascular Systems, Inc. | Laser assisted wire end forming process |
| JP2005230318A (en) * | 2004-02-20 | 2005-09-02 | Miyachi Technos Corp | Method for working catheter |
| CN201102127Y (en) * | 2007-12-07 | 2008-08-20 | 北京工业大学 | Laser three-dimensional accurate cutting system of metallic tubule |
| CN201596850U (en) * | 2009-09-11 | 2010-10-06 | 华南师范大学 | Optical fiber laser micro-processing system for cutting stents inside blood vessels |
| US20130153542A1 (en) * | 2009-12-22 | 2013-06-20 | W. C. Heraeus Gmbh | Method of joining dissimilar materials |
| CN102139415A (en) * | 2011-04-01 | 2011-08-03 | 北京建筑工程学院 | Vascular stent cutting device and vascular stent cutting method |
| CN202506974U (en) * | 2012-01-19 | 2012-10-31 | 昆山思拓机器有限公司 | Laser processing device for intravascular stent |
| CN102657563A (en) * | 2012-05-18 | 2012-09-12 | 上海理工大学 | Bracket positioning device for interventional treatment of vascular opening diseases |
| CN106825945A (en) * | 2017-03-15 | 2017-06-13 | 山东吉威医疗制品有限公司 | A kind of cutting technique of angiocarpy bracket |
| CN108213704A (en) * | 2017-12-26 | 2018-06-29 | 太原理工大学 | Utilize the method for ultra-short pulse laser manufacture human body implantation stent |
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| CN111069769B (en) | 2022-02-25 |
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