CN112264705A - Be used for medical titanium alloy material impeller laser welding frock - Google Patents
Be used for medical titanium alloy material impeller laser welding frock Download PDFInfo
- Publication number
- CN112264705A CN112264705A CN202011378755.7A CN202011378755A CN112264705A CN 112264705 A CN112264705 A CN 112264705A CN 202011378755 A CN202011378755 A CN 202011378755A CN 112264705 A CN112264705 A CN 112264705A
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- Prior art keywords
- impeller assembly
- impeller
- gland
- laser welding
- diameter
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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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
-
- 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
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/1224—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in vacuum
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a laser welding tool for a medical titanium alloy material impeller, which belongs to the technical field of precision machining and comprises an air cylinder, a gland, a base and an air blowing pipe, wherein one end of the base is clamped on a laser welding machine tool, and the other end of the base is provided with a groove for placing an impeller assembly to realize the welding between a gasket of the impeller assembly and a shell; the gland is a revolving body structure, a boss for compressing the impeller assembly is arranged in the gland, and a through hole with the diameter larger than the diameter of the welding line of the impeller assembly is formed in the gland; the air reservoir is a hollow revolving body structure, the upper end of the air reservoir is provided with a working hole, and the diameter of the working hole is larger than the diameter of the welding line of the impeller assembly. The invention can realize high-efficiency heat dissipation in the welding process and avoid the deformation of the impeller assembly caused by excessive heating.
Description
Technical Field
The invention relates to a laser welding tool for a medical titanium alloy material impeller, and belongs to the technical field of precision machining.
Background
The impeller component is a core component of the magnetic liquid suspension type blood pump, the quality of the impeller component is the key for realizing the function of the blood pump, the impeller component is made of medical titanium alloy and structurally comprises a thin wall, a spatial inclined plane, a deep hole (groove) and the like. Through research and clearance in recent years, special process rules for impeller shells and components are compiled and solidified, relevant processing parameters are solidified, key processing process technologies of impeller components are basically overcome, shape and position indexes such as part sizes and surface quality basically meet design requirements, products are subjected to repeated in-vitro hemolysis and animal test verification, indexes such as hemolysis reach technical requirements, blood pumps and impeller components are good in performance, good effects are obtained on the whole, and all parties can recognize the products.
With the increasing approach of clinical application of blood pumps, factors such as the stability and the service life of products all put higher requirements on impellers, such as the consistency of the quality of impeller batches, the control of surface processing textures, the quality of welding parts, and the smooth transition of grooves, transition surfaces and edges. The main problems in the prior art are that the gap exists between the impeller assembly and the fine welding process guarantee, and the welding seam quality of the impeller assembly needs to be controlled finely. The high-quality manufacturing of the impeller assembly is realized, so that the product quality meets the index requirements of blood pump hemolysis and the like, and the aim of meeting clinical application is achieved.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the laser welding tool for the medical titanium alloy material impeller is provided, the laser welding can be realized in a low-vacuum environment through an inert gas storage space, and the welding process is prevented, so that the titanium alloy generates high-temperature molten metal to absorb hydrogen and oxygen, and air holes are formed; in addition, high-efficiency heat dissipation in the welding process can be realized, and deformation caused by excessive heating of the impeller assembly is avoided.
The technical scheme of the invention is as follows:
a laser welding tool for medical titanium alloy material impellers comprises an air cylinder, a gland, a base and an air blowing pipe,
one end of the base is clamped on a laser welding machine tool, and the other end of the base is provided with a groove for placing the impeller assembly to realize the welding between the gasket of the impeller assembly and the shell;
the gland is a revolving body structure, a boss for compressing the impeller assembly is arranged in the gland, and a through hole with the diameter larger than the diameter of the welding line of the impeller assembly is formed in the gland;
the air reservoir is of a hollow revolving body structure, the upper end of the air reservoir is provided with a working hole, and the diameter of the working hole is larger than the diameter of a welding line of the impeller assembly;
the air storage cylinder is connected with the gland, an air storage space is formed between the air storage cylinder and the gland and used for storing inert gas, and the air storage cylinder and the gland are connected in a sealing manner;
the gas blowing pipe connected to the laser welding machine tool is located above the working hole, and blows inert gas into the gas storage space at a certain angle and a certain flow rate to protect a welding seam.
Furthermore, the impeller assembly is in clearance fit with the groove, and the fit clearance is 0.01-0.02 mm.
Furthermore, the impeller assembly is of a revolving body structure, a through hole is formed in the middle of the impeller assembly, and the front face of the part to be welded of the impeller assembly faces upwards.
Further, the impeller assembly is 2-3mm higher than the groove.
Furthermore, the diameter of the gland through hole is 2-3mm larger than the diameter of the welding line of the impeller assembly.
Furthermore, the diameter of the working hole is 2-3mm larger than the diameter of the welding line of the impeller assembly.
Further, the angle of the air blowing pipe relative to the plane of the air storage cylinder is 45-60 degrees.
Further, the air blowing pipe blows air at the flow rate of 8-15 ml/s.
Furthermore, the whole welding tool has a heat conductivity coefficient not lower than 110W (mK)-1The non-ferrous metal of (2).
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, laser welding in a low vacuum environment can be realized through the inert gas storage space, so that the welding process is prevented, and the titanium alloy generates high-temperature molten metal to absorb hydrogen and oxygen, thereby forming air holes;
(2) the invention can realize high-efficiency heat dissipation in the welding process and avoid the deformation of the impeller assembly caused by excessive heating.
Drawings
FIG. 1 is a schematic view of laser welding of an impeller assembly of the present invention, wherein 1-a laser lens, 2-a gas blowing pipe, 3-a laser beam, 4-an inert gas, 5-a gas cylinder, 6-a gland, 7-the impeller assembly, 8-a base, and 9-a machine tool.
Detailed Description
The invention is further illustrated by the following examples.
A laser welding tool for medical titanium alloy material impeller, as shown in figure 1, comprising an air cylinder, a gland, a base and an air blow pipe,
one end of the base is clamped on a laser welding machine tool, and the other end of the base is provided with a groove for placing the impeller assembly to realize the welding between the gasket of the impeller assembly and the shell;
the gland is a revolving body structure, a boss for compressing the impeller assembly is arranged in the gland, and a through hole with the diameter larger than the diameter of the welding line of the impeller assembly is formed in the gland;
the air reservoir is of a hollow revolving body structure, the upper end of the air reservoir is provided with a working hole, and the diameter of the working hole is larger than the diameter of a welding line of the impeller assembly;
the air storage cylinder is connected with the gland, an air storage space is formed between the air storage cylinder and the gland and used for storing inert gas, and the air storage cylinder and the gland are connected in a sealing manner;
the gas blowing pipe connected to the laser welding machine tool is located above the working hole, and blows inert gas into the gas storage space at a certain angle and a certain flow rate to protect a welding seam.
The impeller component is in clearance fit with the groove, and the fit clearance is 0.01-0.02 mm. The impeller assembly is of a revolving body structure, a through hole is formed in the middle of the impeller assembly, and the front face of the part to be welded of the impeller assembly faces upwards. The impeller assembly is 2-3mm higher than the groove.
The diameter of the gland through hole is 2-3mm larger than the diameter of the impeller assembly welding line. The diameter of the working hole is 2-3mm larger than the diameter of the welding line of the impeller assembly. The angle of the air blowing pipe relative to the plane of the air storage cylinder is 45-60 degrees. The blowing pipe blows air at the flow rate of 8-15 ml/s.
The whole welding tool has the thermal conductivity coefficient not lower than 110W (mK)-1The non-ferrous metal of (2).
Based on the existing common laser welding equipment, the impeller assembly adopts an open type protection device for laser welding, namely, the impeller assembly is exposed in the atmospheric environment during welding, and the titanium alloy can strongly absorb nitrogen, hydrogen and oxygen along with the rise of temperature during welding to generate welding air holes. The existence of the air holes can directly influence indexes such as hemolysis of the blood pump, and thrombus can be formed in the body of a patient seriously, thus threatening the life of the patient.
Aiming at the requirements of continuity, no air holes and no defects of the medical titanium alloy material impeller, the invention designs a set of process equipment which is convenient to disassemble and assemble and can be accurately positioned; the device has an inert gas storage space, can realize laser welding in a low-vacuum environment and prevent the welding process, and because the titanium alloy generates high-temperature molten metal to absorb hydrogen and oxygen during welding, air holes are formed. In addition, the equipment can also realize high-efficiency heat dissipation in the welding process, and deformation caused by excessive heating of the impeller assembly is avoided.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (9)
1. A laser welding tool for medical titanium alloy material impellers is characterized by comprising an air cylinder, a gland, a base and an air blowing pipe,
one end of the base is clamped on a laser welding machine tool, and the other end of the base is provided with a groove for placing the impeller assembly to realize the welding between the gasket of the impeller assembly and the shell;
the gland is a revolving body structure, a boss for compressing the impeller assembly is arranged in the gland, and a through hole with the diameter larger than the diameter of the welding line of the impeller assembly is formed in the gland;
the air reservoir is of a hollow revolving body structure, the upper end of the air reservoir is provided with a working hole, and the diameter of the working hole is larger than the diameter of a welding line of the impeller assembly;
the air storage cylinder is connected with the gland, an air storage space is formed between the air storage cylinder and the gland and used for storing inert gas, and the air storage cylinder and the gland are connected in a sealing manner;
the gas blowing pipe connected to the laser welding machine tool is located above the working hole, and blows inert gas into the gas storage space at a certain angle and a certain flow rate to protect a welding seam.
2. The laser welding tool for the medical titanium alloy material impeller as claimed in claim 1, wherein the impeller assembly is in clearance fit with the groove, and the fit clearance is 0.01-0.02 mm.
3. The laser welding tool for the medical titanium alloy material impeller according to claim 1, wherein the impeller assembly is of a revolving body structure, a through hole is formed in the middle of the impeller assembly, and the front face of a part to be welded of the impeller assembly faces upwards.
4. The laser welding tool for the medical titanium alloy material impeller as claimed in claim 1, wherein the impeller assembly is 2-3mm higher than the groove.
5. The laser welding tool for the medical titanium alloy material impeller according to claim 1, wherein the diameter of the gland through hole is 2-3mm larger than the diameter of the welding line of the impeller assembly.
6. The laser welding tool for the medical titanium alloy material impeller is characterized in that the diameter of the working hole is 2-3mm larger than the diameter of the welding line of the impeller assembly.
7. The laser welding tool for the medical titanium alloy material impeller as claimed in claim 1, wherein the angle of the gas blowing pipe with respect to the plane of the gas cylinder is 45 ° to 60 °.
8. The laser welding tool for the medical titanium alloy material impeller as claimed in claim 1 or 7, wherein the blowing pipe blows air at a flow rate of 8-15 ml/s.
9. The laser welding tool for the impeller of the medical titanium alloy material according to claim 1, wherein the whole welding tool has a thermal conductivity of not less than 110W (mK)-1The non-ferrous metal of (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378755.7A CN112264705A (en) | 2020-11-30 | 2020-11-30 | Be used for medical titanium alloy material impeller laser welding frock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378755.7A CN112264705A (en) | 2020-11-30 | 2020-11-30 | Be used for medical titanium alloy material impeller laser welding frock |
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| Publication Number | Publication Date |
|---|---|
| CN112264705A true CN112264705A (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011378755.7A Pending CN112264705A (en) | 2020-11-30 | 2020-11-30 | Be used for medical titanium alloy material impeller laser welding frock |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935568A (en) * | 2012-11-15 | 2013-02-20 | 西安交通大学 | Laser welding clamp and protecting device for titanium alloy thin-walled workpiece in shape of complex space |
| CN204818440U (en) * | 2015-08-26 | 2015-12-02 | 航天海鹰(哈尔滨)钛业有限公司 | Titanium alloy precision form spare laser welding gas protection device |
| CN106425090A (en) * | 2016-10-19 | 2017-02-22 | 中航飞机股份有限公司西安飞机分公司 | Laser welding gas protective device used for aluminum alloy parts |
| CN107081524A (en) * | 2017-06-07 | 2017-08-22 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of Titanium Laser Welding guard method |
| CN108672934A (en) * | 2018-04-25 | 2018-10-19 | 西安飞机工业（集团）有限责任公司 | A kind of gas shield device of titanium alloy conduit laser welding and guard method |
| CN109708783A (en) * | 2019-02-22 | 2019-05-03 | 无锡昆仑富士仪表有限公司 | A kind of corrosion resistant metal diaphragm component and its method for laser welding |
| US20200023475A1 (en) * | 2018-07-22 | 2020-01-23 | Asia Vital Components Co., Ltd. | Jig structure for manufacturing heat dissipation unit |
-
2020
- 2020-11-30 CN CN202011378755.7A patent/CN112264705A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935568A (en) * | 2012-11-15 | 2013-02-20 | 西安交通大学 | Laser welding clamp and protecting device for titanium alloy thin-walled workpiece in shape of complex space |
| CN204818440U (en) * | 2015-08-26 | 2015-12-02 | 航天海鹰(哈尔滨)钛业有限公司 | Titanium alloy precision form spare laser welding gas protection device |
| CN106425090A (en) * | 2016-10-19 | 2017-02-22 | 中航飞机股份有限公司西安飞机分公司 | Laser welding gas protective device used for aluminum alloy parts |
| CN107081524A (en) * | 2017-06-07 | 2017-08-22 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of Titanium Laser Welding guard method |
| CN108672934A (en) * | 2018-04-25 | 2018-10-19 | 西安飞机工业（集团）有限责任公司 | A kind of gas shield device of titanium alloy conduit laser welding and guard method |
| US20200023475A1 (en) * | 2018-07-22 | 2020-01-23 | Asia Vital Components Co., Ltd. | Jig structure for manufacturing heat dissipation unit |
| CN109708783A (en) * | 2019-02-22 | 2019-05-03 | 无锡昆仑富士仪表有限公司 | A kind of corrosion resistant metal diaphragm component and its method for laser welding |
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Application publication date: 20210126 |