CN111976149A - Friction lap welding method for aluminum alloy and ABS material - Google Patents
Friction lap welding method for aluminum alloy and ABS material Download PDFInfo
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- CN111976149A CN111976149A CN202010638552.0A CN202010638552A CN111976149A CN 111976149 A CN111976149 A CN 111976149A CN 202010638552 A CN202010638552 A CN 202010638552A CN 111976149 A CN111976149 A CN 111976149A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
- B29C65/0672—Spin welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
- B29C66/7422—Aluminium or alloys of aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides a friction lap welding method of an aluminum alloy and an ABS material, which comprises an early treatment process, a friction lap welding clamping process and a friction lap welding process; wherein, the friction lap welding clamping process is as follows: overlapping and clamping an aluminum alloy plate and an ABS resin plate on a welding tool workbench clamp; the welding tool is a friction stir welding device with a needleless welding stirring head; the friction lap welding process is as follows: starting a welding tool, adjusting a main shaft of the welding tool to enable a needleless welding stirring head to be perpendicular to the aluminum alloy plate, and rotationally pressing the needleless welding stirring head into the aluminum alloy plate until a set pressing depth is reached; then the needleless welding stirring head keeps the set pressing depth and moves on the surface welding area of the aluminum alloy plate at a constant feeding speed in a rotating state. The method can realize welding between the aluminum alloy and the ABS material, and has the advantages of simple parameter setting, convenient operation and good quality of a welding joint.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a friction lap welding method for an aluminum alloy and an ABS material.
Background
Butadiene-acrylonitrile-styrene ((C8H 8. C4H 6. C3H3N) x) ABS for short is a non-crystalline resin material, has the melting point of 170 ℃ and the thermal decomposition temperature of 260 ℃, has higher mechanical strength and good comprehensive performance, and belongs to general plastics. ABS is easy to absorb moisture, low in shrinkage rate, stable in size, easy to machine and form, good in processability, high in smoothness, low in cost and wide in application prospect due to balance between performances. The aluminum alloy has the characteristics of light weight, high strength, corrosion resistance, difficult oxidation, easy forming and the like as an alloy, and has important application in the fields of automobiles, aerospace and the like.
Thermoplastic resin-lightweight metal composite structures are increasingly being used in the automotive, aerospace and electronics industries, where they have high strength to weight ratios, excellent corrosion resistance, thermal and electrical insulation properties and design flexibility, and are therefore highly attractive. However, direct connection of thermoplastic resin and metal is difficult because of their great difference in chemical and physical properties.
However, these techniques have disadvantages such as environmental pollution, long processing time, insufficient joint strength, stress concentration, and the like. Laser welding and electron beam welding belong to fusion welding, and are easy to generate air holes, cracks, segregation and brittle phases. The brazing filler metal for brazing needs to be specially developed, the strength of a joint is influenced by the brazing filler metal, the strength is low, and the brazing filler metal cannot be used in a high-temperature environment. The solid phase diffusion welding has long welding time and low production efficiency, and the generation of brittle phase is greatly influenced by the welding temperature and time. Friction spot welding of thermoplastic resin and metal has been studied in recent years, but setting parameters are complicated in implementation, and a welded joint by friction spot welding is also limited in size, shape, and the like.
Therefore, a method which can realize the welding of the aluminum alloy and the ABS resin material, is simple in parameter setting, convenient and fast to operate and good in welded joint quality is urgently needed to be designed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a friction lap welding method of an aluminum alloy and an ABS material; the method can realize welding between the aluminum alloy and the ABS material, and has the advantages of simple parameter setting, convenient operation and good quality of a welding joint.
In order to achieve the purpose, the invention is realized by the following technical scheme: a friction lap welding method of an aluminum alloy and an ABS material is characterized in that: the method comprises a pre-treatment process, a friction lap welding clamping process and a friction lap welding process which are sequentially executed; wherein the content of the first and second substances,
the pretreatment process comprises the following steps: respectively carrying out pretreatment on the aluminum alloy plate and the ABS resin plate to ensure that the specification shapes of the aluminum alloy plate and the ABS resin plate are matched; removing an oxide layer on the welding surface of the aluminum alloy plate; cleaning and drying the aluminum alloy plate and the ABS resin plate;
the friction lap welding clamping procedure is as follows: overlapping and clamping an aluminum alloy plate and an ABS resin plate on a welding tool workbench clamp; wherein the aluminum alloy plate is positioned above the ABS resin plate, and the ABS resin plate is positioned below the ABS resin plate; the welding tool is friction stir welding equipment with a needleless welding stirring head;
the friction lap welding process is as follows: starting a welding tool, adjusting a main shaft of the welding tool to enable a needle-free welding stirring head to be perpendicular to the aluminum alloy plate, and rotationally pressing the needle-free welding stirring head into the aluminum alloy plate until the bottommost end of a shaft shoulder of the needle-free welding stirring head is pressed into the surface of the aluminum alloy plate to reach a set pressing depth; then the pin-less welding stirring head keeps the set pressing depth and moves in a welding area on the surface of the aluminum alloy plate at a constant feeding speed in a rotating state, so that heat is transferred from the surface of the heated aluminum alloy plate to the joint of the ABS resin plate and the aluminum alloy plate, the ABS resin plate forms a narrow melting area, and the molten ABS resin is solidified under the pressure generated by the contact of the molten ABS resin and the aluminum alloy plate, so that the welding between the aluminum alloy plate and the ABS resin plate is realized.
The friction lap welding method can be implemented by adopting friction stir welding equipment, the welding stirring head which can be repeatedly used is pressed into the surface of the aluminum alloy plate and moves along the overlapped area of the aluminum alloy plate and the ABS resin plate by utilizing the heat energy generated by the friction between the welding stirring head and the surface of the aluminum alloy plate, and the pressure is applied to a connecting interface while the connecting material is heated. The welding stirring head of the friction stir welding device is provided with a stirring probe to help the material flow, and the welding stirring head of the friction lap welding device is not provided with the stirring probe and adopts a needleless welding stirring head.
In the invention, heat is transferred from the surface of the heated aluminum alloy plate to the lap joint of the ABS resin plate and the aluminum alloy plate, the ABS resin plate forms a narrow melting area, and the molten ABS resin is solidified under the pressure generated by the contact of the molten ABS resin and the aluminum alloy plate, so that the welding between the aluminum alloy plate and the ABS resin plate is realized. Therefore, the invention can form a high-strength welding joint, does not cause any damage to the basic material, welding equipment and the design of the geometric shape of the joint, and has the advantages of less parameters to be set, no pollution to the environment and wide application prospect.
Preferably, in the clamping procedure before friction lap welding, the lap width range of the aluminum alloy plate and the ABS resin plate is 5-100 mm.
Preferably, in the friction lap welding process, the rotating speed range of the welding stirring head is set to be 800-5000 rpm, the value range of the pressing depth is set to be 0.1-1 mm, and the value range of the constant feeding speed is 50-600 mm/min.
The setting of welding stirring head is pushed down the depth of pressure and is 0.1 ~ 1mm, has both guaranteed the stability of welding among the welding process, has strengthened thermal conduction simultaneously, is of value to ABS resin material's rapid melting, has improved welding quality.
The constant feeding speed is set to be 50-600 mm/min, the problem that the machining temperature window is small due to the fact that the separation between the melting point and the decomposition temperature of the ABS resin material is small is solved, the welding interface temperature in the welding process is kept between the melting point and the decomposition temperature of the ABS resin material, the problem that the welding joint strength is damaged due to the fact that the ABS resin material is decomposed by heating due to overhigh welding temperature is avoided, and the problem that welding failure is caused due to the fact that the ABS resin material cannot be melted due to overlow welding temperature is also avoided.
Preferably, the environmental conditions of the friction lap welding are: the environmental temperature is kept at 25-35 ℃, and the humidity is kept at 35-45%; the needle-free welding stirring head is made of H13 steel, and the diameter range of a shaft shoulder is 5-30 mm.
Preferably, the method further comprises a welding effect evaluation procedure; the welding effect evaluation procedure is as follows: the quality of the welded joint formed by friction lap welding was evaluated.
Preferably, in the welding effect evaluation process, the quality evaluation method includes: recording temperature data of a welding interface of the aluminum alloy plate and the ABS resin plate in the friction lap welding process; after the friction lap welding process, intercepting part of a welding joint sample to prepare a sample, and performing a mechanical tension-shear test; and cutting out a welding joint sample, carrying out cold inlaying on the sample, then grinding and polishing, and carrying out microstructure evaluation on the welding joint.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the friction lap welding operation of the aluminum alloy and the ABS resin material can be realized by simply replacing the welding stirring head by using the conventional friction stir welding equipment, the welding device is simple, the welding set parameters are few, the requirement on the welding environment is low, the welding investment is greatly reduced, and the welding efficiency is improved;
2. the invention solves the problem that the ABS resin material is easy to be decomposed by heat to generate bubble holes when in friction welding, thereby reducing the quality of a welding joint; the welding efficiency is ensured, meanwhile, the generation of bubble holes of the welding joint is greatly reduced, and the welding joint of the aluminum alloy and the ABS with higher quality is obtained;
3. the friction lap welding belongs to a low-temperature welding technology, and the strength of a welding joint cannot be influenced by a large amount of bubbles generated at a welding seam due to overhigh temperature under reasonable parameters; meanwhile, the welding temperature is low, the damage to welding materials is small, and the environment is not polluted while the welded joint with attractive appearance is obtained.
Drawings
FIG. 1 is a flow chart of the friction lap welding method of the aluminum alloy and the ABS material of the present invention;
FIG. 2 is a schematic process diagram of a friction lap welding method of an aluminum alloy and an ABS material according to an embodiment;
FIG. 3 is a schematic diagram of a mechanical tensile shear test specimen prepared by the friction lap welding method of aluminum alloy and ABS material in the second embodiment;
FIG. 4 is a scanning electron microscope image of a cross section of a welded joint in the friction lap welding method of the second aluminum alloy and the ABS material according to the embodiment;
FIG. 5 is a scanning electron microscope image of a cross section of a welded joint of the friction lap welding method of the aluminum alloy and the ABS material of the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example one
The friction lap welding method for the aluminum alloy and the ABS material comprises a pretreatment process, a friction lap welding clamping process and a friction lap welding process which are sequentially executed as shown in FIG. 1.
The pretreatment process comprises the following steps: respectively carrying out pretreatment on the aluminum alloy plate and the ABS resin plate to ensure that the specification shapes of the aluminum alloy plate and the ABS resin plate are matched; removing an oxide layer on the welding surface of the aluminum alloy plate; and cleaning and drying the aluminum alloy plate and the ABS resin plate.
The friction lap welding clamping procedure is as follows: overlapping and clamping an aluminum alloy plate and an ABS resin plate on a welding tool workbench clamp; wherein the aluminum alloy plate is positioned above the ABS resin plate, and the ABS resin plate is positioned below the ABS resin plate; the welding tool is friction stir welding equipment with a needleless welding stirring head. The lapping width range of the aluminum alloy plate and the ABS resin plate is 5-100 mm.
The friction lap welding process is as follows: starting a welding tool, adjusting a main shaft of the welding tool to enable a needle-free welding stirring head to be perpendicular to an aluminum alloy plate, and rotationally pressing the needle-free welding stirring head into the aluminum alloy plate until the lowest end of a shaft shoulder of the needle-free welding stirring head is pressed into the surface of the aluminum alloy plate to reach a set pressing depth, wherein the rotating speed range of the welding stirring head is set to be 800-5000 rpm; setting the value range of the pressing depth to be 0.1-1 mm; and then the needleless welding stirring head keeps the set pressing depth and moves in a welding area on the surface of the aluminum alloy plate at a constant feeding speed in a rotating state, the value range of the constant feeding speed is 50-600 mm/min, heat is transferred from the surface of the heated aluminum alloy plate to the joint of the ABS resin plate and the aluminum alloy plate, the ABS resin plate forms a narrow melting area, and the melted ABS resin is solidified under the pressure generated by the contact with the aluminum alloy plate so as to realize the welding between the aluminum alloy plate and the ABS resin plate.
The setting of welding stirring head is pushed down the depth of pressure and is 0.1 ~ 1mm, has both guaranteed the stability of welding among the welding process, has strengthened thermal conduction simultaneously, is of value to ABS resin material's rapid melting, has improved welding quality.
The constant feeding speed is set to be 50-600 mm/min, the problem that the machining temperature window is small due to the fact that the separation between the melting point and the decomposition temperature of the ABS resin material is small is solved, the welding interface temperature in the welding process is kept between the melting point and the decomposition temperature of the ABS resin material, the problem that the welding joint strength is damaged due to the fact that the ABS resin material is decomposed by heating due to overhigh welding temperature is avoided, and the problem that welding failure is caused due to the fact that the ABS resin material cannot be melted due to overlow welding temperature is also avoided.
The environmental conditions of the friction lap welding were: the environmental temperature is kept at 25-35 ℃, and the humidity is kept at 35-45%; the needle-free welding stirring head is made of H13 steel, and the diameter range of a shaft shoulder is 5-30 mm.
Preferably, the method further comprises a welding effect evaluation procedure; the welding effect evaluation procedure is as follows: the quality of the welded joint formed by friction lap welding was evaluated.
The quality evaluation method comprises the following steps: recording temperature data of a welding interface of the aluminum alloy plate and the ABS resin plate in the friction lap welding process; after the friction lap welding process, intercepting part of a welding joint sample to prepare a sample, and performing a mechanical tension-shear test; and cutting out a welding joint sample, carrying out cold inlaying on the sample, then grinding and polishing, and carrying out microstructure evaluation on the welding joint.
Example two
In the present embodiment, a friction lap welding method of aluminum alloy and ABS material is described by taking a 6061-T6 type aluminum alloy plate and an ABS resin plate as an example, as shown in fig. 2.
The early stage treatment process comprises the following steps: the aluminum alloy plate and the ABS plate adopt the specification of 300mm multiplied by 100mm multiplied by 2mm, and 400-2000 mesh sand paper is used for grinding and polishing the aluminum alloy plate to remove surface oxide layers and impurities. And cleaning the surfaces of the aluminum alloy plate and the ABS resin plate by using alcohol, removing stains such as oil stains and the like, and drying.
A friction lap welding clamping procedure: overlapping and clamping an aluminum alloy plate and an ABS resin plate on a welding tool workbench clamp; wherein the aluminum alloy plate is positioned above the ABS resin plate, and the ABS resin plate is positioned below the ABS resin plate; the width of the lap joint area is 30 mm; the welding tool is a friction stir welding device with a needleless welding stirring head;
a friction lap welding procedure: the temperature of the welding environment is kept at 25-35 ℃, the humidity is 35% -45%, the material of the needleless welding stirring head is H13 steel, and the diameter of the shaft shoulder is 13 mm. Adjusting a welding tool main shaft to be vertical to the workbench, starting the welding tool main shaft to enable the needle-free welding stirring head to rotate at the rotating speed of 2000rpm, then controlling the needle-free welding stirring head to press in a welded workpiece while rotating, starting a feed switch of the main shaft after the pressing depth reaches 0.7mm, setting the constant feed speed to be 300mm/min, and keeping the pressing depth of the needle-free welding stirring head to be 0.7mm all the time until welding is completed.
A welding effect evaluation procedure: cutting out part of the welded joint sample, and performing a mechanical tension-shear test; and additionally, intercepting a part of a welding joint sample for cold sample inlaying, grinding and polishing by using an automatic sample grinder, and observing and analyzing the microstructure of the cross section by using an optical microscope, a scanning electron microscope, a transmission electron microscope, an energy spectrometer and the like.
The sample subjected to the mechanical test is processed into a strip with the width of 15mm and the direction perpendicular to the welding direction, and fig. 3 is a schematic diagram of sample preparation of the mechanical sample. A tensile shear test is carried out by using an electronic universal testing machine, the load of the universal testing machine is 50KN, the tensile speed of a chuck is 0.5mm/min, the result shows that the maximum load of a joint is 0.734KN, and a sample is broken at the ABS resin plate. The cold-inlaid sample is observed by a scanning electron microscope, the scanning electron microscope image of the cross section of the welding joint is shown in fig. 4, the ABS layer, the ABS melting layer and the 6061-T6 aluminum alloy layer are respectively arranged from top to bottom, defects such as bubble holes and the like are not observed in the ABS melting layer and the ABS layer near the welding interface, and the quality of the welding joint is good.
EXAMPLE III
In this embodiment, a friction lap welding method for aluminum alloy and ABS material is described by taking a 6061-T6 type aluminum alloy plate and an ABS resin plate as an example. The difference between this embodiment and the second embodiment is: in the friction lap welding process of this example, the constant feed rate was set to 600mm/min, and the rest of the procedure was the same as in the example.
In the welding effect evaluation procedure, an electronic universal testing machine is used for carrying out a tensile-shearing test, the load of the universal testing machine is 50KN, the tensile speed of a chuck is 0.5mm/min, the result shows that the maximum load of a joint is 0.752KN, and a sample is broken at the ABS resin plate. And (3) observing the cold-inlaid sample by using a scanning electron microscope, wherein the scanning electron microscope image of the cross section of the joint is shown in fig. 5, the ABS layer, the ABS melting layer and the 6061-T6 aluminum alloy layer are respectively arranged from top to bottom, no bubble hole is observed in the ABS melting layer and the ABS layer close to the welding interface, and the quality of the welding joint is good.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (6)
1. A friction lap welding method of an aluminum alloy and an ABS material is characterized in that: the method comprises a pre-treatment process, a friction lap welding clamping process and a friction lap welding process which are sequentially executed; wherein the content of the first and second substances,
the pretreatment process comprises the following steps: respectively carrying out pretreatment on the aluminum alloy plate and the ABS resin plate to ensure that the specification shapes of the aluminum alloy plate and the ABS resin plate are matched; removing an oxide layer on the welding surface of the aluminum alloy plate; cleaning and drying the aluminum alloy plate and the ABS resin plate;
the friction lap welding clamping procedure is as follows: overlapping and clamping an aluminum alloy plate and an ABS resin plate on a welding tool workbench clamp; wherein the aluminum alloy plate is positioned above the ABS resin plate, and the ABS resin plate is positioned below the ABS resin plate; the welding tool is friction stir welding equipment with a needleless welding stirring head;
the friction lap welding process is as follows: starting a welding tool, adjusting a main shaft of the welding tool to enable a needle-free welding stirring head to be perpendicular to the aluminum alloy plate, and rotationally pressing the needle-free welding stirring head into the aluminum alloy plate until the bottommost end of a shaft shoulder of the needle-free welding stirring head is pressed into the surface of the aluminum alloy plate to reach a set pressing depth; then the pin-less welding stirring head keeps the set pressing depth and moves in a welding area on the surface of the aluminum alloy plate at a constant feeding speed in a rotating state, so that heat is transferred from the surface of the heated aluminum alloy plate to the joint of the ABS resin plate and the aluminum alloy plate, the ABS resin plate forms a narrow melting area, and the molten ABS resin is solidified under the pressure generated by the contact of the molten ABS resin and the aluminum alloy plate, so that the welding between the aluminum alloy plate and the ABS resin plate is realized.
2. The friction lap welding method of aluminum alloy and ABS material according to claim 1, characterized in that: in the clamping procedure before friction lap welding, the lap width range of the aluminum alloy plate and the ABS resin plate is 5-100 mm.
3. The friction lap welding method of aluminum alloy and ABS material according to claim 1, characterized in that: in the friction lap welding procedure, the rotating speed range of the welding stirring head is set to be 800-5000 rpm, the value range of the pressing depth is set to be 0.1-1 mm, and the value range of the constant feeding speed is 50-600 mm/min.
4. The friction lap welding method of aluminum alloy and ABS material according to claim 1, characterized in that: the environmental conditions of the friction lap welding are as follows: the environmental temperature is kept at 25-35 ℃, and the humidity is kept at 35-45%; the needle-free welding stirring head is made of H13 steel, and the diameter range of a shaft shoulder is 5-30 mm.
5. The friction lap welding method of aluminum alloy and ABS material according to claim 1, characterized in that: the method also comprises a welding effect evaluation procedure; the welding effect evaluation procedure is as follows: the quality of the welded joint formed by friction lap welding was evaluated.
6. The friction lap welding method of aluminum alloy and ABS material according to claim 5, characterized in that: in the welding effect evaluation procedure, the quality evaluation method comprises the following steps: recording temperature data of a welding interface of the aluminum alloy plate and the ABS resin plate in the friction lap welding process; after the friction lap welding process, intercepting part of a welding joint sample to prepare a sample, and performing a mechanical tension-shear test; and cutting out a welding joint sample, carrying out cold inlaying on the sample, then grinding and polishing, and carrying out microstructure evaluation on the welding joint.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113469388A (en) * | 2021-09-06 | 2021-10-01 | 江苏中车数字科技有限公司 | Maintenance system and method for rail transit vehicle |
| CN113681159A (en) * | 2021-08-20 | 2021-11-23 | 山东大学 | Laser welding device for metal and thermoplastic composite material and method and application thereof |
| CN114523187A (en) * | 2022-01-21 | 2022-05-24 | 山东大学 | Friction stir point connection process based on concave pin-free shoulder reinforced light alloy/thermoplastic composite material connection strength |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113681159A (en) * | 2021-08-20 | 2021-11-23 | 山东大学 | Laser welding device for metal and thermoplastic composite material and method and application thereof |
| CN113681159B (en) * | 2021-08-20 | 2022-08-12 | 山东大学 | Laser welding device for metal and thermoplastic composite material and method and application thereof |
| CN113469388A (en) * | 2021-09-06 | 2021-10-01 | 江苏中车数字科技有限公司 | Maintenance system and method for rail transit vehicle |
| CN114523187A (en) * | 2022-01-21 | 2022-05-24 | 山东大学 | Friction stir point connection process based on concave pin-free shoulder reinforced light alloy/thermoplastic composite material connection strength |
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Application publication date: 20201124 |