CN117718579A - Nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device and method - Google Patents
Nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device and method Download PDFInfo
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- CN117718579A CN117718579A CN202311789063.5A CN202311789063A CN117718579A CN 117718579 A CN117718579 A CN 117718579A CN 202311789063 A CN202311789063 A CN 202311789063A CN 117718579 A CN117718579 A CN 117718579A
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- guide wire
- nickel
- welding
- stainless steel
- titanium alloy
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- 238000003466 welding Methods 0.000 title claims abstract description 169
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 128
- 229910001000 nickel titanium Inorganic materials 0.000 title claims abstract description 116
- 239000010935 stainless steel Substances 0.000 title claims abstract description 103
- 238000010894 electron beam technology Methods 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 8
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 34
- 230000017105 transposition Effects 0.000 claims description 34
- 238000003860 storage Methods 0.000 claims description 14
- 238000001179 sorption measurement Methods 0.000 claims description 13
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000003028 elevating effect Effects 0.000 claims 2
- 238000007664 blowing Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 229910000679 solder Inorganic materials 0.000 claims 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract description 2
- 238000004506 ultrasonic cleaning Methods 0.000 abstract description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 20
- 239000010410 layer Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 210000004204 blood vessel Anatomy 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Wire Processing (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses an electron beam welding device and method for a nickel-titanium alloy wire and stainless steel medical composite guide wire, which relate to the technical field of medical equipment and comprise the following steps: step one: treating the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire; step two: electrically polishing the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire by using a mixed solution of perchloric acid and acetic acid, and carrying out ultrasonic cleaning in an acetone bath for later use; step three: installing a nickel-titanium alloy guide wire and a stainless steel guide wire into an electron beam welding device, and aligning a central shaft; step four: and adjusting the energy of the electron beam to perform welding. The nickel-titanium alloy composite guide wire manufactured by the invention is directly welded, so that the problems of enlarged section of a joint part and addition of different materials are solved; meanwhile, through precise energy control of electron beams, the problems that the joint parts are difficult to fuse mutually, the joint parts are embrittled, the nickel-titanium wires lose super elasticity and the like are solved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an electron beam welding device and an electron beam welding method for a nickel-titanium alloy wire and stainless steel medical composite guide wire.
Background
In the process of diagnosis and treatment, the intravascular alloy guide wire needs to pass through a blood vessel which is bent and has branches and a narrow part, and the distal end needs to be controlled to reach a target part through a proximal end with a certain length, the proximal end needs to have the characteristics of supporting property and easy control and pushing, and the distal end needs to have flexibility, no damage to the wall of the small blood vessel and super elasticity which is difficult to deform after bending because of thin and complex bending of the wall of the small blood vessel. A composite guidewire with stainless steel wire at the proximal end and nitinol wire at the distal end is needed.
Conventional devices and techniques are used for welding an intravascular nickel-titanium alloy guide wire and a stainless steel guide wire, titanium is easy to oxidize, nickel-titanium and stainless steel are difficult to fuse mutually, the joint of the nickel-titanium and stainless steel is embrittled, and the nickel-titanium wire cannot realize effective connection due to the high Wen Shiqu super elasticity and the like.
The existing composite guide wire connecting mode comprises the methods of externally sleeving, bonding nickel-titanium alloy wires and stainless steel wires, interlayer welding between the nickel-titanium alloy wires and the stainless steel wires and the like, but the external sleeving leads to local increase of wire diameter and influences push property and trafficability, the end is bonded by glue, the defects of low connection strength and dissimilar materials exist, and the interlayer welding between the nickel-titanium alloy wires and the stainless steel wires has the defects of dissimilar metal melting and insufficient strength.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide an electron beam welding device and method for a nickel-titanium alloy wire and stainless steel medical composite guide wire.
In order to achieve the above purpose, the present invention provides the following technical solutions: an electron beam welding method for a nickel-titanium alloy wire and a stainless steel medical composite guide wire comprises the following steps:
step one: treating the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire, and polishing to a bright surface by using a grinding wheel or a grinding machine;
step two: electrically polishing a welding end of a nickel-titanium alloy guide wire of the nickel-titanium alloy guide wire and a welding end of a stainless steel guide wire of the stainless steel guide wire by using a mixed solution of perchloric acid and acetic acid, and then ultrasonically cleaning the nickel-titanium alloy guide wire and the stainless steel guide wire in an acetone bath for later use;
step three: installing the nickel-titanium alloy guide wire and the stainless steel guide wire into an electron beam welding device, and aligning the central axes of the nickel-titanium alloy guide wire and the stainless steel guide wire;
step four: and adjusting electron beam energy according to the wire diameters of the nickel-titanium alloy guide wire and the stainless steel guide wire, and welding the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire.
Further, in the fourth step, the direct welding range covered by the electron beam energy is within 1 μm, and the heat affected zone is within 10 μm;
in the fourth step, inert gas is blown to the welding area of the nickel-titanium alloy guide wire and the stainless steel guide wire, and the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire are covered to isolate oxygen and protect the nickel-titanium alloy from oxidation.
Further, in the first step, the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire are ground into mutually matched planes.
Furthermore, the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire are coaxially butted together, and no intermediate layer is added in the middle.
Further, the weld between the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire is kept within 10 mu m.
Further, the maximum depth-to-width ratio of the welding seam between the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire is 50:1.
the invention also discloses an electron beam welding device for the nickel-titanium alloy wire and the stainless steel medical composite guide wire, which is used for welding the nickel-titanium alloy wire and the stainless steel guide wire in the third and fourth steps of the electron beam welding method for the nickel-titanium alloy wire and the stainless steel medical composite guide wire, and comprises a foundation box, wherein one side of the foundation box is provided with a fixed table, and the upper side of the fixed table is provided with a welding box and an air supply box;
an electron beam module is arranged on the side face of the basic box, and the output end of the electron beam module extends to the inside of the welding box;
a plurality of feeding assemblies are arranged on two sides of the welding box, and each feeding assembly on two sides of the welding box is used for conveying a nickel-titanium alloy guide wire and a stainless steel guide wire into the welding box for electron beam welding;
the feeding components at two sides of the welding box are in one-to-one correspondence, and a sealing component is arranged between the two corresponding groups of feeding components;
the welding box is internally provided with airtight boxes between each sealing assembly and the output end of the electron beam module, the output end of the air supply box is communicated with each airtight box, gaps exist between the airtight boxes and the corresponding sealing assemblies before welding, the airtight boxes are started, inert gas is blown into the airtight boxes, and air in the airtight boxes is discharged;
the seal assembly reduces the gap area of the corresponding underside region of the hermetic container during welding.
Further, the feeding assembly comprises a fixed cylinder connected with the welding box, the inside of the fixed cylinder is rotationally connected with a transposition cylinder, a driving assembly is arranged on the side surface of the fixed cylinder, the output end of the driving assembly is connected with the transposition cylinder, and the driving assembly drives the transposition cylinder to rotate in the fixed cylinder after being started;
a plurality of annularly distributed alignment grooves are formed in the transposition barrel, and the side surfaces of the alignment grooves incline towards the bottom, so that the nickel-titanium alloy guide wire or the stainless steel guide wire can conveniently guide after entering;
a plurality of conveying components and adsorbing components are arranged in the transposition barrel and positioned on the upper side and the lower side of each transposition groove;
a plurality of welding end moving assemblies and a plurality of positioning assemblies are arranged in one end, facing the sealing assembly, of the transposition barrel;
each welding end moving assembly and each positioning assembly are respectively arranged on the lower side of each alignment groove, and each positioning assembly is positioned on one side of the welding end moving assembly, which faces the sealing assembly.
Further, the positioning assembly comprises a first lifting unit connected with the transposition barrel, and a limiting plate is arranged at the output end of the first lifting unit;
when the nickel-titanium alloy guide wire or the stainless steel guide wire moves along the corresponding alignment groove, the limiting plate moves to the inside of the alignment groove based on the first lifting unit, so that the moving distance of the nickel-titanium alloy guide wire or the stainless steel guide wire is limited;
the top of the limiting plate is provided with a U-shaped groove, and after the position of the nickel-titanium alloy guide wire or the stainless steel guide wire is limited, the limiting plate descends based on the limiting plate to enable the bottom of the U-shaped groove to descend to be not higher than the height of the bottom of the corresponding alignment groove;
and one side of the limiting plate, which faces the welding end moving assembly, is provided with an induction module positioned at the lower side of the U-shaped groove, and after the nickel-titanium alloy guide wire or the stainless steel guide wire is contacted with the induction module, the limiting plate generates data and is connected with a corresponding transmission assembly at the upper side of the alignment groove in parallel to stop the transmission of the nickel-titanium alloy guide wire or the stainless steel guide wire.
Further, the welding end moving assembly comprises a first horizontal driving unit, a connecting frame is arranged at the output end of the first horizontal driving unit, and an adsorption frame is arranged at the upper side of the connecting frame;
and sliding grooves for sliding the corresponding adsorption frames are formed in the bottoms of the alignment grooves facing one end of the sealing assembly.
Further, a detection assembly positioned at the lower side of the welding box is arranged at the upper side of the fixed table;
a through groove is formed in the outer side of the transposition barrel and positioned on one side of each welding end moving assembly;
the detection assembly comprises a second horizontal driving unit, two groups of output ends with opposite moving directions are arranged on the second horizontal driving unit, driving frames are arranged at the output ends of the second horizontal driving unit, and movable frames are connected to one sides of the driving frames, which are opposite to the sealing assembly, in a sliding manner;
the movable frame is provided with a mounting frame on one side facing the sealing assembly through a plurality of elastic pieces, and the movable frame and the mounting frame are respectively positioned on two sides of the driving frame;
the side surface of the driving frame is provided with a pressure sensing unit positioned at one side of the movable frame;
the upper side of the mounting frame is provided with a second lifting unit, the output end of the second lifting unit faces upwards, and the mounting frame is provided with a clamping unit;
after the nickel-titanium alloy guide wire and the stainless steel guide wire are welded, the nickel-titanium alloy guide wire and the stainless steel guide wire rotate to the lowest side of the transposition barrel along with the contraposition groove, then the nickel-titanium alloy guide wire and the stainless steel guide wire are separated from the corresponding welding end moving assembly, part of the nickel-titanium alloy guide wire and the stainless steel guide wire fall into the corresponding through groove based on the weight of the nickel-titanium alloy guide wire and the stainless steel guide wire, and then the two groups of clamping units ascend based on the second lifting unit to respectively clamp and detect the nickel-titanium alloy guide wire and the stainless steel guide wire in the corresponding two groups of contraposition grooves.
Further, the sealing assembly comprises positioning grooves, a plurality of positioning grooves are formed in the positioning grooves, and each positioning groove is matched with each alignment groove in the corresponding transposition barrel;
after the nickel-titanium alloy guide wire and the stainless steel guide wire move along the corresponding positioning grooves, the welding end of the nickel-titanium alloy guide wire and the welding end of the stainless steel guide wire finally move to the inside of the corresponding positioning groove for butt joint;
pushing units are arranged at two ends of the positioning groove, which are positioned at two sides of the bottom of each positioning groove, in the positioning groove, and positioning blocks are arranged at the output ends of the pushing units;
when the nickel-titanium alloy guide wire and the stainless steel guide wire are positioned in the corresponding positioning grooves, four groups of positioning blocks are arranged in the positioning grooves in a total mode, and the four groups of positioning blocks are paired in pairs and respectively clamped at one side of the welding end of the nickel-titanium alloy guide wire and one side of the welding end of the stainless steel guide wire;
clamping grooves are formed in one side, facing the corresponding positioning grooves, of each positioning block, after the nickel-titanium alloy guide wire and the stainless steel guide wire enter the positioning grooves, the nickel-titanium alloy guide wire and the stainless steel guide wire are clamped by the two groups of positioning grooves through the clamping grooves, and the moving directions of the nickel-titanium alloy guide wire and the stainless steel guide wire are limited;
the utility model discloses a U-shaped storage groove has been seted up to the inside both sides that are located the constant head tank of constant head tank, the equal sliding connection in top of storage groove top both sides has the storage groove, and the internally mounted of storage groove has the expansion member.
Compared with the prior art, the invention has the following beneficial effects:
the nickel-titanium alloy composite guide wire manufactured by the invention is directly welded, so that the problems of enlarged section of a joint part and addition of different materials are solved; meanwhile, through precise energy control of electron beams, the problems that the joint parts are difficult to fuse mutually, the joint parts are embrittled, the nickel-titanium wires lose super elasticity and the like are solved;
the energy of a welding area can be accurately controlled by adopting an electron beam precise welding method, the welding area is controlled to be in a micron level, the penetration energy is uniform inside and outside the welding, the welding seam and a welding heat affected zone reach the micron level, the welding seam and the welding heat affected zone are far superior to the traditional welding, the obtained joint does not have brittle transition, the superelasticity of a nickel-titanium alloy wire is not influenced, and the welding of the nickel-titanium alloy wire with the strength close to that of a parent body and a stainless steel wire is realized;
on the other hand, when the electron beam welding device is used for welding, the nickel-titanium alloy guide wires and the stainless steel guide wires are fed and spliced through the feeding components, the processing efficiency is high, and after the nickel-titanium alloy guide wires and the stainless steel guide wires are welded through the detection component, the welding firmness of welding parts can be detected.
Drawings
FIG. 1 is a schematic structural view of an electron beam welding device for a medical composite guide wire of nickel-titanium alloy wire and stainless steel;
FIG. 2 is a cross-sectional view of a weld box in the electron beam welding apparatus of the present invention;
FIG. 3 is an enlarged view of the portion A of FIG. 2 in accordance with the present invention;
FIG. 4 is a side view of a feed assembly in an electron beam welding apparatus of the present invention;
FIG. 5 is a partial cross-sectional view of a sensing assembly in an electron beam welding apparatus of the present invention;
FIG. 6 is a side cross-sectional view of a seal assembly in an electron beam welding apparatus of the present invention;
FIG. 7 is a schematic diagram of welding a nitinol wire to a stainless steel wire according to the present invention.
Wherein: 1. a base box; 2. a fixed table; 3. welding a box; 4. an electron beam module; 5. a feeding assembly; 6. a detection assembly; 7. a gas supply tank; 8. a seal assembly; 9. an airtight box; 51. a fixed cylinder; 52. a transposition cylinder; 53. a drive assembly; 54. an alignment groove; 55. an adsorption assembly; 56. a transfer assembly; 57. a welding end moving assembly; 58. a positioning assembly; 59. a through groove; 571. a first horizontal driving unit; 572. a connecting frame; 573. an adsorption frame; 581. a first lifting unit; 582. a limiting plate; 61. a second horizontal driving unit; 62. a drive rack; 63. a movable frame; 64. an elastic member; 65. a mounting frame; 66. a second lifting unit; 67. a clamping unit; 81. a positioning groove; 82. a pushing unit; 83. a positioning block; 84. a storage groove; 85. a sealing block; 86. an expansion member; 110. a nickel-titanium alloy guide wire; 120. stainless steel guide wires; 111. a nickel-titanium alloy guide wire welding end; 121. stainless steel wire welded ends.
Detailed Description
Referring to fig. 1 to 7, the electron beam welding method of the nickel-titanium alloy wire and the stainless steel medical composite guide wire comprises the following steps:
step one: the welding end 111 of the nickel-titanium alloy guide wire 110 and the welding end 121 of the stainless steel guide wire 120 are processed to ensure that the plane of the end part forms 90 degrees with the radial direction of the wire, and the end part is polished to a bright surface by a grinding wheel or a grinding machine;
step two: the welding end 111 of the nickel-titanium alloy guide wire 110 and the welding end 121 of the stainless steel guide wire 120 are electrically polished by using a mixed solution of perchloric acid and acetic acid, and then the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 are subjected to ultrasonic cleaning in an acetone bath for later use;
step three: installing the nitinol wire 110 and the stainless steel wire 120 into an electron beam welding device, aligning central axes of the nitinol wire 110 and the stainless steel wire 120;
the electron beam welding device comprises a base box 1, wherein a fixed table 2 is arranged on one side of the base box 1, and a welding box 3 and an air supply box 7 are arranged on the upper side of the fixed table 2;
the side surface of the base box 1 is provided with an electron beam module 4, and the output end of the electron beam module 4 extends to the inside of the welding box 3;
a plurality of feeding components 5 are arranged on two sides of the welding box 3, and each feeding component 5 on two sides of the welding box 3 is used for conveying a nickel-titanium alloy guide wire 110 and a stainless steel guide wire 120 into the welding box 3 for electron beam welding;
the feeding components 5 at two sides of the welding box 3 are in one-to-one correspondence, and a sealing component 8 is arranged between the two corresponding groups of feeding components 5;
an airtight box 9 is arranged inside the welding box 3 between each sealing assembly 8 and the output end of the electron beam module 4, the bottom of the airtight box 9 is provided with a welding port corresponding to the sealing assembly 8, the output end of the air supply box 7 is communicated with each airtight box 9, a gap exists between the airtight box 9 and the corresponding sealing assembly 8 before welding, the airtight box 9 is started, inert gas is blown into the airtight box 9, and air in the airtight box 9 is discharged;
the seal assembly 8 reduces the gap area of the lower side region of the corresponding airtight box 9 at the time of welding;
a detection assembly 6 positioned at the lower side of the welding box 3 is arranged at the upper side of the fixed table 2;
referring to fig. 2, the feeding assembly 5 includes a fixed cylinder 51 connected to the welding box 3, a transposition cylinder 52 is rotatably connected to the inside of the fixed cylinder 51, a driving assembly 53 is mounted on a side surface of the fixed cylinder 51, an output end of the driving assembly 53 is connected to the transposition cylinder 52, and after the driving assembly 53 is started, the transposition cylinder 52 is driven to rotate in the fixed cylinder 51;
an air pump module is arranged in the transposition barrel 52;
a plurality of annularly distributed alignment grooves 54 are formed in the transposition barrel 52, and the side surfaces of the alignment grooves 54 incline towards the bottom, so that the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 can conveniently guide after entering;
a plurality of conveying components 56 and adsorbing components 55 are arranged in the transposition barrel 52 on the upper side and the lower side of each alignment groove 54;
the conveying assembly 56 comprises a wheel body driven by a driving module, and a stroke assembly is arranged between the driving module and the transposition tube 52 and is used for driving the wheel body to descend into the corresponding alignment groove 54 so as to facilitate the contact between the alignment groove 54 and the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120;
the deformation layer is arranged on the outer side of the wheel body, and after the deformation layer is contacted with the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120, the contact area between the deformation layer and the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 is increased, so that the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 can be driven to move along the alignment groove 54;
after the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 enters the alignment groove 54, the adsorption component 55 corresponding to the alignment groove 54 is started, the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 is adsorbed to finish positioning, and then the transmission component 56 is started to drive the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 to slide along the corresponding alignment groove 54;
the end of the transposition barrel 52 facing the sealing assembly 8 is internally provided with a plurality of welding end moving assemblies 57 and a plurality of positioning assemblies 58;
each welding end moving component 57 and each adsorption component 55 in the same transposition barrel 52 are connected with an air pump module in the same transposition barrel 52;
each of the welding end moving members 57 and the positioning members 58 is mounted on the lower side of each of the alignment grooves 54, respectively, and the positioning members 58 are located on the side of the welding end moving member 57 facing the sealing member 8.
Referring to fig. 3, the positioning assembly 58 includes a first elevation unit 581 connected to the index cylinder 52, and a limiting plate 582 is installed at an output end of the first elevation unit 581;
when the nitinol wire 110 or the stainless steel wire 120 moves along the corresponding alignment groove 54, the limiting plate 582 limits the moving distance of the nitinol wire 110 or the stainless steel wire 120 based on the movement of the first lifting unit 581 to the inside of the alignment groove 54;
after the position of the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 is limited, the limiting plate 582 descends based on the limiting plate 582, and the bottom of the U-shaped groove is lowered to a height not higher than the bottom of the corresponding alignment groove 54, so that the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 can conveniently pass through and enter the sealing assembly 8;
the side of the limiting plate 582 facing the welding end moving assembly 57 is provided with an induction module positioned at the lower side of the U-shaped groove, and after the nitinol wire 110 or the stainless steel wire 120 contacts with the induction module, the induction module generates data and is connected with the corresponding conveying assembly 56 at the upper side of the alignment groove 54 in parallel to stop conveying the nitinol wire 110 or the stainless steel wire 120.
The welding end moving assembly 57 includes a first horizontal driving unit 571, a connecting frame 572 is installed at an output end of the first horizontal driving unit 571, and an adsorption frame 573 is installed at an upper side of the connecting frame 572;
the bottoms of the alignment grooves 54 facing one end of the sealing assembly 8 are provided with sliding grooves for sliding corresponding to the adsorption frames 573;
an initial distance is arranged between the adsorption frame 573 and the limiting plate 582, and the length of the initial distance is adjusted to control the stroke distance that the adsorption frame 573 drives the nickel-titanium alloy guide wire 110 or the stainless steel guide wire 120 to move into the sealing assembly 8;
the nitinol wire 110 and the stainless steel wire 120 are based on the conveying assembly 56 in the corresponding alignment groove 54, after one end of the conveying assembly moves to the upper side of the adsorbing frame 573, the adsorbing frame 573 is in adsorption connection with the bottom of the nitinol wire 110 or the stainless steel wire 120, and drives the nitinol wire 110 and the stainless steel wire 120 to continue moving along with the first horizontal driving unit 571 until the nitinol wire welding end 111 of the nitinol wire 110 and the stainless steel wire welding end 121 of the stainless steel wire 120 are moved into the sealing assembly 8;
a through groove 59 is formed on the outer side of the transposition barrel 52 and positioned on one side of each welding end moving assembly 57;
referring to fig. 5, the detecting assembly 6 includes a second horizontal driving unit 61, the second horizontal driving unit 61 is provided with two groups of output ends with opposite moving directions, each output end of the second horizontal driving unit 61 is provided with a driving frame 62, and one side of the driving frame 62 facing away from the sealing assembly 8 is slidably connected with a movable frame 63;
the movable frame 63 is provided with a mounting frame 65 on one side facing the sealing assembly 8 through a plurality of elastic pieces 64, and the movable frame 63 and the mounting frame 65 are respectively positioned on two sides of the driving frame 62;
the side of the driving frame 62 is provided with a pressure sensing unit positioned at one side of the movable frame 63;
the upper side of the mounting frame 65 is provided with a second lifting unit 66, the output end of the second lifting unit 66 faces upwards, and a clamping unit 67 is arranged;
referring to fig. 6, the sealing assembly 8 includes positioning grooves 81, and a plurality of positioning grooves 81 are formed in the positioning grooves 81, and each positioning groove 81 is matched with each alignment groove 54 in the corresponding index cylinder 52;
after the nitinol wire 110 and the stainless steel wire 120 move along the corresponding alignment groove 54, the nitinol wire welding end 111 and the stainless steel wire welding end 121 finally move to the inside of the corresponding alignment groove 81 for butt joint;
pushing units 82 are arranged at two ends of the inside of the positioning groove 81, which are positioned at two sides of the bottom of each positioning groove 81, and positioning blocks 83 are arranged at the output ends of each pushing unit 82;
when the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 are positioned in the corresponding positioning groove 81, four groups of positioning blocks 83 are arranged in the positioning groove 81 in a total, and the four groups of positioning blocks 83 are paired in pairs and respectively clamped at one side of a nickel-titanium alloy guide wire welding end 111 of the nickel-titanium alloy guide wire 110 and one side of a stainless steel guide wire welding end 121 of the stainless steel guide wire 120;
each positioning block 83 is provided with a clamping groove on one side facing the corresponding positioning groove 81, and after the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 enter the positioning groove 81, the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 are clamped by the two groups of positioning grooves 81 through the clamping grooves, and the moving direction of the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 is limited;
the inside of the positioning groove 81 is provided with U-shaped storage grooves 84 at two sides of the positioning groove 81, the tops of the two sides of the top of the storage groove 84 are both connected with the storage groove 84 in a sliding manner, and an expansion piece 86 is arranged in the storage groove 84;
the expansion piece 86 is connected with the air pump module in the adjacent alignment groove 54, and a reset structure is arranged in the expansion piece 86, and after the air pump module stops supplying air to the expansion piece 86, the reset structure resets the expansion piece 86;
after the expansion piece 86 is inflated and expanded, the two groups of sealing blocks 85 corresponding to the top of the expansion piece 86 are lifted from the storage groove 84 until the two groups of sealing blocks are abutted to the lower side of the airtight box 9, then the expansion piece 86 is inflated, gaps between the side corresponding to the positioning groove 81 and the side surface of the transposition barrel 52 are filled, and the area of the gaps among the transposition barrel 52, the positioning groove 81 and the airtight box 9 is controlled by controlling the expansion area of the expansion piece 86;
step four: according to the wire diameters of the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120, adjusting electron beam energy to weld the nickel-titanium alloy guide wire welding end 111 of the nickel-titanium alloy guide wire 110 and the stainless steel guide wire welding end 121 of the stainless steel guide wire 120;
after the nitinol wire 110 and the stainless steel wire 120 are welded, the nitinol wire 110 and the stainless steel wire 120 rotate to the lowest side of the transposition barrel 52 along with the alignment groove 54, then the nitinol wire 110 and the stainless steel wire 120 are separated from the corresponding welding end moving assembly 57, and based on the weight of the welding end moving assembly, part of the welding end moving assembly falls into the corresponding through groove 59, then the two groups of clamping units 67 ascend based on the second lifting unit 66, and clamp the nitinol wire 110 and the stainless steel wire 120 in the corresponding two groups of alignment grooves 54 respectively;
then, two groups of output ends of the second horizontal driving unit 61 are started, the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 are pulled, and the tension applied to the welding position of the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 is recorded through the pressure sensing units in the two groups of driving frames 62, so that the firmness of the welding position of the nickel-titanium alloy guide wire 110 and the stainless steel guide wire 120 is detected;
after the nitinol wire 110 is welded with the stainless steel wire 120, no sleeve is added outside the joint, and the joint strength of the welded composite wire approaches that of the nitinol body.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention are intended to be considered as protecting the scope of the present template.
Claims (9)
1. The electron beam welding method for the medical composite guide wire of the nickel-titanium alloy wire and the stainless steel is characterized by comprising the following steps of:
step one: the welding end (111) of the nickel-titanium alloy guide wire (110) and the welding end (121) of the stainless steel guide wire (120) are treated and polished to a bright surface;
step two: electrically polishing a nickel-titanium alloy guide wire welding end (111) of a nickel-titanium alloy guide wire (110) and a stainless steel guide wire welding end (121) of a stainless steel guide wire (120) by using a mixed solution of perchloric acid and acetic acid, and ultrasonically cleaning the nickel-titanium alloy guide wire (110) and the stainless steel guide wire (120) in an acetone bath for later use;
step three: installing the nickel-titanium alloy guide wire (110) and the stainless steel guide wire (120) into an electron beam welding device, and aligning central axes of the nickel-titanium alloy guide wire (110) and the stainless steel guide wire (120);
step four: and adjusting electron beam energy according to the wire diameters of the nickel-titanium alloy guide wire (110) and the stainless steel guide wire (120), and welding a nickel-titanium alloy guide wire welding end (111) of the nickel-titanium alloy guide wire (110) and a stainless steel guide wire welding end (121) of the stainless steel guide wire (120).
2. The nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding method according to claim 1, wherein the maximum value of the depth-to-width ratio of the welding seam of the nickel-titanium alloy wire welding end (111) and the welding seam of the stainless steel wire welding end (121) is 50:1.
3. the nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding method according to claim 1, wherein the weld of the nickel-titanium alloy wire welding end (111) and the stainless steel wire welding end (121) is less than 10 μm.
4. The nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding method according to claim 1, wherein no solder is added between the nickel-titanium alloy wire welding end (111) and the stainless steel wire welding end (121).
5. The nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device according to any one of claims 1 to 4, which is used in the third and fourth steps of claim 1, and comprises a base box (1), wherein a fixed table (2) is installed on one side of the base box (1), and a welding box (3) and an air supply box (7) are installed on the upper side of the fixed table (2);
an electron beam module (4) is arranged on the side surface of the base box (1), and the output end of the electron beam module (4) extends to the inside of the welding box (3);
a plurality of feeding assemblies (5) are arranged on two sides of the welding box (3), and each feeding assembly (5) on two sides of the welding box (3) is used for conveying a nickel-titanium alloy guide wire (110) and a stainless steel guide wire (120) into the welding box (3) for electron beam welding;
the feeding components (5) at two sides of the welding box (3) are in one-to-one correspondence, and a sealing component (8) is arranged between the two corresponding groups of feeding components (5);
an airtight box (9) is arranged inside the welding box (3) and between each sealing assembly (8) and the output end of the electron beam module (4), and the output end of the air supply box (7) is communicated with each airtight box (9);
before welding, starting the airtight box (9), blowing inert gas into the airtight box (9), and discharging air in the airtight box (9);
during welding, the sealing assembly (8) reduces the gap area of the lower side area of the corresponding airtight box (9).
6. The nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device according to claim 5, wherein the feeding component (5) comprises a fixed cylinder (51) connected with a welding box (3), a transposition cylinder (52) is rotatably connected inside the fixed cylinder (51), a driving component (53) is mounted on the side surface of the fixed cylinder (51), and the output end of the driving component (53) is connected with the transposition cylinder (52);
a plurality of alignment grooves (54) which are distributed in a ring shape are formed in the transposition barrel (52);
a plurality of conveying components (56) and adsorbing components (55) are arranged in the transposition barrel (52) and positioned on the upper side and the lower side of each counterpoint groove (54);
one end of the transposition barrel (52) facing the sealing component (8) is internally provided with a plurality of welding end moving components (57) and a plurality of positioning components (58);
each of the welding end moving members (57) and the positioning members (58) is mounted on the lower side of each of the alignment grooves (54), respectively, and the positioning members (58) are located on the side of the welding end moving member (57) facing the sealing member (8).
7. The nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device according to claim 6, wherein the positioning assembly (58) comprises a first lifting unit (581) connected with the transposition tube (52), and a limiting plate (582) is installed at the output end of the first lifting unit (581);
a U-shaped groove is formed in the top of the limiting plate (582), and an induction module positioned at the lower side of the U-shaped groove is installed on one side of the limiting plate (582) facing the welding end moving assembly (57);
the welding end moving assembly (57) comprises a first horizontal driving unit (571), a connecting frame (572) is arranged at the output end of the first horizontal driving unit (571), and an adsorption frame (573) is arranged on the upper side of the connecting frame (572);
the bottoms of the alignment grooves (54) facing one end of the sealing assembly (8) are provided with sliding grooves for sliding corresponding to the adsorption frames (573).
8. The nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device according to claim 7, wherein a detection assembly (6) positioned on the lower side of the welding box (3) is arranged on the upper side of the fixed table (2);
a through groove (59) is formed in the outer side of the transposition barrel (52) and positioned on one side of each welding end moving assembly (57);
the detection assembly (6) comprises a second horizontal driving unit (61), the second horizontal driving unit (61) is provided with two groups of output ends with opposite moving directions, each output end of the second horizontal driving unit (61) is provided with a driving frame (62), and one side of the driving frame (62) back to the sealing assembly (8) is connected with a movable frame (63) in a sliding manner;
the movable frame (63) is provided with a mounting frame (65) through a plurality of elastic pieces (64) on one side of the movable frame (63) facing the sealing assembly (8), and the movable frame (63) and the mounting frame (65) are respectively positioned on two sides of the driving frame (62);
the side surface of the driving frame (62) is provided with a pressure sensing unit positioned at one side of the movable frame (63);
the upper side of mounting bracket (65) is installed second elevating unit (66), clamping unit (67) is installed on the top of second elevating unit (66).
9. The nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device according to claim 8, wherein the sealing assembly (8) comprises positioning grooves (81), a plurality of positioning grooves (81) are formed in the positioning grooves (81), and each positioning groove (81) is matched with each alignment groove (54) in the corresponding transposition barrel (52);
pushing units (82) are arranged at two ends of the inside of the positioning groove (81) and positioned at two sides of the bottom of each positioning groove (81), and positioning blocks (83) are arranged at the output ends of each pushing unit (82);
clamping grooves are formed in one side, facing the corresponding positioning groove (81), of each positioning block (83);
the utility model discloses a U-shaped storage groove (84) has all been seted up to the both sides that are located constant head tank (81) inside constant head tank (81), the top of storage groove (84) top both sides all sliding connection has storage groove (84), and the internally mounted of storage groove (84) has expansion member (86).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311789063.5A CN117718579B (en) | 2023-12-25 | 2023-12-25 | Nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device and method |
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| CN202311789063.5A CN117718579B (en) | 2023-12-25 | 2023-12-25 | Nickel-titanium alloy wire and stainless steel medical composite guide wire electron beam welding device and method |
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| CN117718579B CN117718579B (en) | 2024-05-31 |
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| CN117718579B (en) | 2024-05-31 |
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