CN111660001A - Ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method - Google Patents
Ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method Download PDFInfo
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- CN111660001A CN111660001A CN202010533904.6A CN202010533904A CN111660001A CN 111660001 A CN111660001 A CN 111660001A CN 202010533904 A CN202010533904 A CN 202010533904A CN 111660001 A CN111660001 A CN 111660001A
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- ultrasonic vibration
- annular filler
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
- B21J15/027—Setting rivets by friction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/10—Riveting machines
- B21J15/12—Riveting machines with tools or tool parts having a movement additional to the feed movement, e.g. spin
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides an ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method, which comprises the following steps: the fixing structure is used for generating ultrasonic vibration, and a first metal plate and a second metal plate are arranged at the top of the fixing structure. According to the invention, the friction stir threads arranged on the side walls of the inner ring and the outer ring of the annular filler are contacted with the second metal plate under high-speed rotation and mutually rub to generate heat, so that the second metal plate and the first metal plate are locally in a thermoplastic state, the materials of the two metal plates around the friction stir threads are mutually diffused and dynamically recrystallized, and under the assistance of ultrasonic vibration, the annular filler extrudes the first metal plate and the second metal plate, so that the plastic deformation of the first metal plate and the second metal plate is continuously increased, and finally, an inner ring mechanical lock and an outer ring mechanical lock with a friction stir welding ring are formed.
Description
Technical Field
The invention relates to the technical field of plate connection, in particular to an ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method.
Background
In recent years, the new energy automobile industry gradually rises, and the light weight becomes a development trend, so that the light weight of the automobile body is beneficial to the aspects of the energy consumption of the whole automobile, the control stability of the automobile, the collision safety and the like. The key point of light weight is the design of a multi-material structure, and different materials are used at different positions of a vehicle body. SPR self-piercing riveting is a technique for joining a plurality of panels of different materials and difficult to rivet, is favored by automobile manufacturers, and is fully applied to the design and manufacture of vehicle bodies.
The self-piercing riveting is a cold connecting technology for connecting two or more metal plates, and after a special rivet penetrates through a top plate, a hollow structure at the tail part of the rivet is expanded and penetrated without penetrating through a bottom plate under the action of a riveting die, so that a firm riveting point is formed. The technology realizes that punching and riveting are completed at one time, and the plating layer of the plate is not damaged in the connecting process, thereby opening up a new way for connecting the automobile body. However, since the special rivet of the self-piercing riveting technology needs to penetrate through the top layer plate, the applied stamping force is large, the energy consumption is large, and higher corrosion risk also exists; and the self-piercing riveting has high sensitivity to negative production influences (such as gaps between plates and manufacturing errors of a die); in addition, it is not suitable for connecting plates with higher strength, such as high-strength steel, titanium alloy, and the like.
Disclosure of Invention
The invention provides an ultrasonic vibration assisted friction stir compression ring locking rivet welding device and method, and aims to solve the problems that a special rivet of a self-piercing rivet welding technology needs to penetrate through a top-layer plate, the applied stamping force is large, the energy consumption is large, the corrosive risk is high, the sensitivity is high, and the special rivet is not suitable for connecting high-strength plates such as high-strength steel and titanium alloy.
In order to achieve the above object, an embodiment of the present invention provides an ultrasonic vibration assisted friction stir compression ring lock rivet welding apparatus, including:
the fixing structure is used for generating ultrasonic vibration, and a first metal plate and a second metal plate are arranged at the top of the fixing structure;
the blank holder is annularly arranged on the second metal plate and is used for tightly pressing the first metal plate and the second metal plate;
the clamping structure is arranged above the fixing structure, the clamping structure moves in the vertical direction, and the clamping structure is used for clamping annular fillers.
Wherein the fixing structure includes:
the die comprises a female die, wherein an annular cavity is arranged in the female die, and grooves are formed in the outer ring and the inner ring of the cavity;
and the ultrasonic vibration system is arranged below the female die.
Wherein the clamping structure comprises:
the clamp holder is arranged above the female die and moves in the vertical direction, and three-jaw claws are arranged at the bottom of the clamp holder;
the controller is arranged at the top of the clamp holder and controls the three claws to move along the radial direction;
the annular filler is installed in the three claws and is arranged in an annular shape.
Wherein the ultrasonic vibration system includes:
the first end of the ultrasonic generator is electrically connected with the controller, and the ultrasonic generator is used for converting power frequency alternating current electric energy into ultrasonic frequency electric oscillation with certain power output;
the energy converter is embedded below the groove in an annular shape, is electrically connected with the second end of the ultrasonic generator, and is used for converting ultrasonic frequency electric oscillation into ultrasonic mechanical vibration;
the amplitude variation ring is annularly embedded below the groove, is arranged at the top of the transducer and is connected with the transducer, and is used for increasing the ultrasonic mechanical vibration amplitude;
the gasket is annularly embedded below the groove, the gasket is arranged at the top of the amplitude variation ring and connected with the amplitude variation ring, and the gasket is used for generating ultrasonic vibration.
Wherein, a manual button is arranged on the controller.
And the side walls of the inner ring and the outer ring of the annular filler are provided with friction stir threads.
The embodiment of the invention also provides an ultrasonic vibration assisted friction stir pressing ring lock rivet welding connection method, which comprises the following steps:
and 6, the holder descends to a certain depth, the rotation is stopped, the controller controls the ultrasonic vibration system to stop working, the controller controls the three-clack claws to move outwards along the radial direction, the annular filler is loosened, and the holder moves upwards in the vertical direction.
The scheme of the invention has the following beneficial effects:
according to the ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method, annular fillers of friction stir threads are arranged on the side walls of the inner ring and the outer ring, the top layer plate does not need to penetrate, the applied stamping force is small, the energy consumption is low, the corrosivity is low, gaps between the plates and mold manufacturing errors are insensitive, heat is generated by friction, the deformation resistance of the materials is reduced, ultrasonic vibration is used, the plasticity of the materials is enhanced, the stress concentration of the materials is reduced, crystal grains in a friction stir area are refined, formed connection points are distributed in a ring shape, an inner ring mechanical lock and an outer ring mechanical lock are formed, and the connection strength of the plates is higher; meanwhile, friction stir welding is utilized to form inner ring friction stir welding and outer ring friction stir welding, so that the mechanical property of the joint is obviously improved, high-strength plates can be effectively connected, the efficiency is high, and the operation is simple.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a schematic view of a female mold of the present invention;
FIG. 3 is a top view of the female mold of the present invention;
FIG. 4 is a positioning diagram of the present invention;
FIG. 5 is a molding diagram of the present invention;
FIG. 6 is a completed form of the present invention;
FIG. 7 is a schematic view of a friction stir compression ring lock weld joint of the present invention.
[ description of reference ]
1-a first metal sheet; 2-a second metal sheet; 3-blank holder; 4-a female die; 5-a gripper; 6-a controller; 7-three claws; 8-a ring-shaped filler; 9-ultrasonic generator; 10-a transducer; 11-a horn ring; 12-a gasket; 13-outer ring friction stir welding; 14-outer ring mechanical lock; 15-inner ring mechanical lock; 16-inner ring friction stir welding.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method, aiming at the problems that a special rivet of the existing self-punching rivet welding technology needs to penetrate through a top layer plate, the applied punching force is large, the energy consumption is large, the corrosive risk is high, the self-punching rivet welding technology has high sensitivity to gaps between plates and manufacturing errors of a die, and the self-punching rivet welding technology is not suitable for connecting high-strength plates such as high-strength steel and titanium alloy.
As shown in fig. 1 to 7, an embodiment of the present invention provides an ultrasonic vibration assisted friction stir compression ring lock rivet welding apparatus, including: the fixing structure is used for generating ultrasonic vibration, and a first metal plate 1 and a second metal plate 2 are arranged at the top of the fixing structure; the blank holder 3 is annularly arranged on the second metal plate 2, and the blank holder 3 is used for tightly pressing the first metal plate 1 and the second metal plate 2; and the clamping structure is arranged above the fixing structure, the clamping structure moves in the vertical direction, and the clamping structure is used for clamping the annular filler 8.
Wherein the fixing structure includes: the die 4 is internally provided with an annular groove; and the ultrasonic vibration system is arranged below the female die 4.
Wherein the clamping structure comprises: the clamp holder 5 is arranged above the female die 4, the clamp holder 5 moves in the vertical direction, and three-jaw claws 7 are arranged at the bottom of the clamp holder 5; a controller 6, wherein the controller 6 is arranged at the top of the clamp 5, and the controller 6 controls the three-jaw 7 to move along the radial direction; and the annular filler 8 is mounted in the three claws 7, and the annular filler 8 is arranged in a ring shape.
According to the ultrasonic vibration assisted friction stir compression ring locking rivet welding device and method provided by the embodiment of the invention, the clamp 5 and the three-jaw 7 can move along the radial direction; the clamp holder 5 and the three-jaw 7 are combined with each other to clamp the annular filler 8, the annular filler 8 is annular, the annular filler 8 is used, a punch side plate cannot be sheared, the applied punching force is small, the energy consumption is low, the corrosivity is low, and the gap between the plates and the manufacturing error of a die are not sensitive.
Wherein the ultrasonic vibration system includes: the first end of the ultrasonic generator 9 is electrically connected with the controller 6, and the ultrasonic generator 9 is used for converting power frequency alternating current electric energy into ultrasonic frequency electric oscillation with certain power output; the energy converter 10 is embedded below the groove in an annular shape, the energy converter 10 is electrically connected with the second end of the ultrasonic generator 9, and the energy converter 10 is used for converting ultrasonic frequency electric oscillation into ultrasonic mechanical vibration; the amplitude variation ring 11 is annularly embedded below the groove, the amplitude variation ring 11 is arranged at the top of the transducer 10, the amplitude variation ring 11 is connected with the transducer 10, and the amplitude variation ring 11 is used for increasing the ultrasonic mechanical vibration amplitude; the gasket 12 is annularly embedded below the groove, the gasket 12 is arranged at the top of the amplitude variation ring 11, the gasket 12 is connected with the amplitude variation ring 11, and the gasket 12 is used for generating ultrasonic vibration.
In the device and the method for locking and riveting the friction stir compression ring assisted by ultrasonic vibration according to the embodiment of the invention, the ultrasonic vibration system is composed of the ultrasonic generator 9, the transducer 10, the amplitude variation ring 11 and the gasket 12, the ultrasonic generator 9 converts power frequency alternating current electric energy into ultrasonic frequency electric oscillation with certain power output, the start and stop of the ultrasonic generator 9 are controlled by the controller 6, the transducer 10 converts the ultrasonic frequency electric oscillation into ultrasonic mechanical vibration, the amplitude of the ultrasonic mechanical vibration is increased through the amplitude variation ring 11, the gasket 12 contacting with the end part of the amplitude variation ring 11 generates ultrasonic vibration, the plasticity of the material is enhanced, the stress concentration of the material is reduced, the crystal grains in the friction stir region are refined, and the mechanical property of the joint is improved.
Wherein, a manual button is arranged on the controller 6.
According to the ultrasonic vibration assisted friction stir compression ring locking rivet welding device and method provided by the embodiment of the invention, the controller 6 is provided with a manual button, and the manual button is used for controlling the three-jaw 7 to clamp or release the annular filler 8.
Wherein, friction stir threads are arranged on the side walls of the inner ring and the outer ring of the annular filler 8.
In the ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method according to the above embodiments of the present invention, friction stir threads are arranged on the side walls of the inner ring and the outer ring of the annular filler 8, and friction heat is generated between the friction stir threads and the second metal plate 2, so that the deformation resistance of the material is reduced, and the material is in a thermoplastic state, so that the ultrasonic vibration assisted friction stir compression ring lock rivet welding device is suitable for connecting plates with higher strength, such as high strength steel, titanium alloy, and the like, and under the combined action of the annular filler 8 with friction stir threads and the female die 4, an inner ring mechanical lock 15 and an outer ring mechanical lock 14 with friction stir welding rings are formed between the first metal plate 1 and the second metal plate 2 under the assistance of ultrasonic vibration.
The embodiment of the invention also provides an ultrasonic vibration assisted friction stir pressing ring lock rivet welding connection method, which comprises the following steps: step 1, stacking a first metal plate 1 and a second metal plate 2 on the top of a female die 4, and tightly pressing the first metal plate 1 and the second metal plate 2 by a blank holder 3; step 2, installing the annular filler 8 in the three-jaw claws 7, operating a manual button of the controller 6 to enable the three-jaw claws 7 to clamp the annular filler 8, enabling the clamp 5 to start to rotate at a high speed and descend, enabling the clamp 5 to drive the annular filler 8 to rotate at a high speed and descend, enabling the annular filler 8 to contact and extrude the second metal plate 2, and enabling the first metal plate 1 and the second metal plate 2 to generate plastic deformation; step 3, lowering the annular filler 8 rotating at a high speed to a certain depth, enabling friction stir threads on the annular filler 8 to be in contact with the second metal plate 2, enabling the friction stir threads to rub with the second metal plate 2 to generate heat, enabling the second metal plate 2 to transfer the heat to the first metal plate 1, enabling the first metal plate 1 and the second metal plate 2 to generate local thermoplastic deformation, enabling materials of the first metal plate 1 and the second metal plate 2 around the friction stir threads to diffuse mutually and dynamically recrystallize gradually, and gradually carrying out friction stir welding; step 4, the annular filler 8 continuously descends, the material of the first metal plate 1 flows into the cavity of the female die 4, the second metal plate 2 flows downwards into the first metal plate 1 along with the punch and gradually fills the cavity of the female die 4, the bottom of the first metal plate 1 is contacted with the gasket 12, the controller 6 controls the ultrasonic vibration system to work, the controller 6 starts the ultrasonic generator 9, the ultrasonic generator 9 converts power frequency alternating current electric energy into ultrasonic frequency electric oscillation with certain power output, the ultrasonic frequency electric oscillation is converted into ultrasonic mechanical vibration through the transducer 10, the amplitude of the ultrasonic mechanical vibration is increased through the amplitude-changing ring 11, and the gasket 12 generates ultrasonic vibration; step 5, further extruding a first metal plate 1 and a second metal plate 2 through an annular filler 8, further plastically deforming the first metal plate 1 and the second metal plate 2, wherein the first metal plate 1 and the second metal plate 2 are restrained by the upper surface of a gasket 12, and gradually filling grooves of an outer ring and an inner ring of a female die 4, materials on the upper side of the first metal plate 1 around the annular filler 8 gradually flow to the periphery of the neck of the second metal plate 2 and are embedded into the second metal plate 2, an inner ring mechanical lock 15 and an outer ring mechanical lock 14 are gradually formed between the first metal plate 1 and the second metal plate 2, and friction stir welding is performed between the annular filler 8 and the first metal plate 1 and the second metal plate 2, so that the first metal plate 1, an inner ring friction stir welding 16 and an outer ring friction stir welding 13 are gradually formed between the second metal plate 2 and the annular filler 8; and 6, the holder 5 descends to a certain depth and stops rotating, the controller 6 controls the ultrasonic vibration system to stop working, the controller 6 controls the three-jaw claws 7 to move outwards along the radial direction and release the annular filler 8, and the holder 5 moves upwards in the vertical direction.
In the ultrasonic vibration assisted friction stir compression ring locking rivet welding device and method according to the above embodiment of the present invention, the blank holder 3 and the female die 4 are fixed, the first metal plate 1 and the second metal plate 2 are stacked on top of the female die 4, the holder 5 is located above the second metal plate 2, the holder 5, the blank holder 3 and the female die 4 have their central axes overlapped, the blank holder 3 compresses the first metal plate 1 and the second metal plate 2, the annular filler 8 is installed in the three-jaw claws 7, the manual button of the controller 6 is operated, the three-jaw claws 7 clamp the annular filler 8, the holder 5 rotates at a high speed and descends in the vertical direction, and drives the annular filler 8 to rotate at a high speed and descend, the bottom of the annular filler 8 rotating at a high speed first contacts with the second metal plate 2, extruding the second metal plate 2 to enable the first metal plate 1 and the second metal plate 2 to generate plastic deformation, lowering the annular filler 8 rotating at a high speed to a certain depth, enabling friction stir threads on the annular filler 8 to be in contact with the second metal plate 2, enabling the friction stir threads to rub against the second metal plate 2 to generate heat, enabling the second metal plate 2 to transfer the heat to the first metal plate 1, enabling the first metal plate 1 and the second metal plate 2 to generate local thermoplastic deformation, enabling materials of the first metal plate 1 and the second metal plate 2 around the friction stir threads to be gradually diffused and dynamically recrystallized, namely gradually performing friction stir welding to enhance the plastic deformation capability of the materials, enabling the annular filler 8 to continue to be lowered, and enabling the materials of the first metal plate 1 to flow into a cavity of the female die 4, the second metal plate 2 flows downwards into the first metal plate 1 along with the punch, the cavity of the female die 4 is gradually filled, when the bottom of the first metal plate 1 contacts the gasket 12, the controller 6 controls the ultrasonic vibration system to work, the controller 6 starts the ultrasonic generator 9, the ultrasonic generator 9 converts power frequency alternating current electric energy into ultrasonic frequency electric oscillation with certain power output, the ultrasonic frequency electric oscillation is converted into ultrasonic mechanical vibration through the transducer 10, the amplitude of the ultrasonic mechanical vibration is increased through the amplitude-changing ring 11, the gasket 12 arranged at the top of the amplitude-changing ring 11 generates ultrasonic vibration, the ultrasonic vibration enhances the plastic deformation capacity of the first metal plate 1 and the second metal plate 2, and the material stress concentration of the metal plates is reduced, and the crystal grains in the stirring friction area are refined; the first metal plate 1 and the second metal plate 2 are further extruded by the annular filler 8, the first metal plate 1 and the second metal plate 2 are further plastically deformed, the first metal plate 1 and the second metal plate 2 are restrained by the upper surface of the gasket 12 to gradually fill the grooves of the outer ring and the inner ring of the female die 4, the material on the upper side of the first metal plate 1 around the annular filler 8 gradually flows to the neck of the second metal plate 2 to be embedded into the second metal plate 2, an inner ring mechanical lock 15 and an outer ring mechanical lock 14 are gradually formed between the first metal plate 1 and the second metal plate 2, meanwhile, friction stir welding is carried out between the annular filler 8 and the first metal plate 1 and the second metal plate 2, and the first metal plate 1, the second metal plate 2, the annular filler 1, the second metal plate 2 and the annular filler are sequentially welded together, so that the first metal plate 1, the second metal plate 2 and the annular filler are sequentially welded, An inner ring friction stir welding 16 and an outer ring friction stir welding 13 are gradually formed between the second metal plate 2 and the annular filler 8, the clamp 5 descends to a certain depth and stops rotating, the controller 6 controls the ultrasonic vibration system of the conveyor belt to stop working, the controller 6 controls the three claws 7 to move outwards in the radial direction and loosen the annular filler 8, then the clamp 5 moves upwards in the vertical direction, an inner ring mechanical lock 15 and an outer ring mechanical lock 14 with friction stir welding rings are formed between the first metal plate 1 and the second metal plate 2, the plate connection strength is higher, and the strength of a joint is obviously improved by the friction stir welding.
According to the ultrasonic vibration assisted friction stir compression ring locking rivet welding device and method, due to the fact that friction heat is generated, the deformation resistance of the material is reduced, the plasticity of the material is enhanced due to the use of ultrasonic vibration, the stress concentration of the material is reduced, grains in a friction stir zone are refined, the mechanical property of a joint is improved, high-strength plates can be effectively connected, efficiency is high, and operation is simple.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. The utility model provides an auxiliary friction stir clamping ring lock rivet welding device of ultrasonic vibration which characterized in that includes:
the fixing structure is used for generating ultrasonic vibration, and a first metal plate and a second metal plate are arranged at the top of the fixing structure;
the blank holder is annularly arranged on the second metal plate and is used for tightly pressing the first metal plate and the second metal plate;
the clamping structure is arranged above the fixing structure, the clamping structure moves in the vertical direction, and the clamping structure is used for clamping annular fillers.
2. The ultrasonic vibration assisted friction stir compression ring lock rivet welding apparatus of claim 1, wherein said securing structure comprises:
the die comprises a female die, wherein an annular cavity is arranged in the female die, and grooves are formed in the outer ring and the inner ring of the cavity;
and the ultrasonic vibration system is arranged below the female die.
3. The ultrasonic vibration assisted friction stir compression ring lock rivet welding apparatus of claim 2, wherein said clamping structure comprises:
the clamp holder is arranged above the female die and moves in the vertical direction, and three-jaw claws are arranged at the bottom of the clamp holder;
the controller is arranged at the top of the clamp holder and controls the three claws to move along the radial direction;
the annular filler is installed in the three claws and is arranged in an annular shape.
4. The ultrasonic vibration assisted friction stir compression ring lock rivet welding apparatus of claim 3, wherein said ultrasonic vibration system comprises:
the first end of the ultrasonic generator is electrically connected with the controller, and the ultrasonic generator is used for converting power frequency alternating current electric energy into ultrasonic frequency electric oscillation with certain power output;
the energy converter is embedded below the groove in an annular shape, is electrically connected with the second end of the ultrasonic generator, and is used for converting ultrasonic frequency electric oscillation into ultrasonic mechanical vibration;
the amplitude variation ring is annularly embedded below the groove, is arranged at the top of the transducer and is connected with the transducer, and is used for increasing the ultrasonic mechanical vibration amplitude;
the gasket is annularly embedded below the groove, the gasket is arranged at the top of the amplitude variation ring and connected with the amplitude variation ring, and the gasket is used for generating ultrasonic vibration.
5. The ultrasonic vibration assisted friction stir compression ring lock rivet welding apparatus of claim 4, wherein a manual button is provided on the controller.
6. The ultrasonic vibration assisted friction stir compression ring lock rivet welding device of claim 5, wherein friction stir threads are provided on the side walls of the inner ring and the outer ring of the annular filler.
7. The ultrasonic vibration assisted friction stir compression ring lock rivet welding connection method is characterized by comprising the following steps of:
step 1, stacking a first metal plate and a second metal plate on the top of a female die, and tightly pressing the first metal plate and the second metal plate by a blank holder;
step 2, installing the annular filler in the three-jaw claws, operating a manual button of the controller to enable the three-jaw claws to clamp the annular filler, enabling the clamp holder to start to rotate at a high speed and descend, enabling the clamp holder to drive the annular filler to rotate at a high speed and descend, enabling the annular filler to contact and extrude the second metal plate, and enabling the first metal plate and the second metal plate to generate plastic deformation;
step 3, lowering the annular filler rotating at a high speed to a certain depth, enabling friction stir threads on the annular filler to be in contact with a second metal plate, enabling the friction stir threads to rub with the second metal plate mutually to generate heat, enabling the second metal plate to transfer the heat to the first metal plate, enabling the first metal plate and the second metal plate to generate local thermoplastic deformation, enabling materials of the first metal plate and the second metal plate around the friction stir threads to be diffused mutually gradually and dynamically recrystallized, and gradually carrying out friction stir welding;
step 4, the annular filler continuously descends, the material of the first metal plate flows into the cavity of the female die, the second metal plate flows downwards into the first metal plate along with the punch and is gradually filled into the cavity of the female die, the bottom of the first metal plate is contacted with the gasket, the controller controls the ultrasonic vibration system to work, the controller starts the ultrasonic generator, the ultrasonic generator converts power frequency alternating current electric energy into ultrasonic frequency electric oscillation with certain power output, the ultrasonic frequency electric oscillation is converted into ultrasonic mechanical vibration through the transducer, the amplitude of the ultrasonic mechanical vibration is increased through the amplitude-changing ring, and the ultrasonic vibration is generated through the gasket;
step 5, further extruding a first metal plate and a second metal plate through an annular filler, wherein the first metal plate and the second metal plate are further subjected to plastic deformation, the first metal plate and the second metal plate are restrained by the upper surface of a gasket and gradually fill grooves of an outer ring and an inner ring of a female die, materials on the upper side of the first metal plate around the annular filler gradually flow to the periphery of the neck of the second metal plate and are embedded into the second metal plate, an inner ring mechanical lock and an outer ring mechanical lock are gradually formed between the first metal plate and the second metal plate, friction stir welding is performed between the annular filler and the first metal plate and between the annular filler and the second metal plate, and inner ring friction stir welding and outer ring friction stir welding are gradually formed between the first metal plate, the second metal plate and the annular filler;
and 6, the holder descends to a certain depth, the rotation is stopped, the controller controls the ultrasonic vibration system to stop working, the controller controls the three-clack claws to move outwards along the radial direction, the annular filler is loosened, and the holder moves upwards in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010533904.6A CN111660001B (en) | 2020-06-12 | 2020-06-12 | Ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010533904.6A CN111660001B (en) | 2020-06-12 | 2020-06-12 | Ultrasonic vibration assisted friction stir compression ring lock rivet welding device and method |
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