CN110394543A - Friction Stir Welding is exerted oneself warm double control-type magnetic levitation worktable and its control method - Google Patents
Friction Stir Welding is exerted oneself warm double control-type magnetic levitation worktable and its control method Download PDFInfo
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- CN110394543A CN110394543A CN201910787839.7A CN201910787839A CN110394543A CN 110394543 A CN110394543 A CN 110394543A CN 201910787839 A CN201910787839 A CN 201910787839A CN 110394543 A CN110394543 A CN 110394543A
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- 238000003466 welding Methods 0.000 title claims abstract description 83
- 238000003756 stirring Methods 0.000 title claims abstract description 38
- 238000005339 levitation Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000013441 quality evaluation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 abstract description 6
- 230000009193 crawling Effects 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 abstract description 4
- 230000009347 mechanical transmission Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- B23K20/123—Controlling or monitoring the welding process
- B23K20/1235—Controlling or monitoring the welding process with temperature control during joining
-
- 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
- B23K20/12—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
- B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
It exerts oneself warm double control-type magnetic levitation worktable the invention discloses a kind of Friction Stir Welding, comprising: bottom support is supported on lathe；Electromagnetic activity frame is movably set in bottom support outside；Workbench, wherein the electromagnet can attract the bottom to support, and generate suspending power, drive the electromagnetic activity frame to slide up and down along relative to bottom support, hold up the workbench；Stirring-head, it is arranged in the bench-top, and it can be slided along the weld seam of to-be-welded pieces, the present invention, which generates magnetism by electromagnet, can attract the bottom to support, suspending power is generated, workbench is held up, mechanical friction, contactless abrasion will not be generated and without lubrication, the crawling problems in mechanical transmission course are completely eliminated, the present invention gives Friction Stir Welding firmly warm double control-type magnetic levitation worktable control method.
Description
Technical field
The present invention relates to Friction Stir Welding field more particularly to a kind of Friction Stir Welding firmly warm double control-type magnetic suspension
Workbench and a kind of Friction Stir Welding are exerted oneself the control method of warm double control-type magnetic levitation worktable.
Background technique
Friction Stir Welding is widely used in aluminium alloy, magnesium alloy as a kind of solid diffusivity technique, this Joining Technology
The connection of equal metals.Friction welding (FW) be mutually moved using workpiece end face, heat caused by phase mutual friction, so that end is reached thermoplasticity
State, then rapid upset, completes a kind of method of welding.Friction welding (FW) connects of the same race or dissimilar material in which can be convenient, including
Metal, part metals based composites, ceramics and plastics.Friction welding method has in manufacturing industry using more than 40 years, due to it
Productivity is high, it is high-quality obtain extensive engineer application, the object of welding is mainly jatharapanvartanasana part, although also having other
The friction welding technology of form occurs, to overcome the limitation of welded piece geometry or improve productivity, but in welding process
In, the heat for the generation that rubs it is bad control and since the factors such as overlap, materials hot deformation cause in welding process, weldquality
Unevenly.
Summary of the invention
The present invention has designed and developed a kind of Friction Stir Welding and has exerted oneself warm double control-type magnetic levitation worktable, is produced by electromagnet
Magnetisation performance enough attracts the bottom to support, and generates suspending power, holds up workbench, will not generate mechanical friction, contactless abrasion
With without lubrication, the crawling problems in mechanical transmission course are completely eliminated.
A further object of the invention is to give Friction Stir Welding to exert oneself the control of warm double control-type magnetic levitation worktable
Method, change electromagnet on electric current in welding process axial force and temperature value control, to obtain high quality
Weld seam.
Technical solution provided by the invention are as follows:
A kind of Friction Stir Welding is exerted oneself warm double control-type magnetic levitation worktable, comprising:
Bottom support, is supported on lathe；
Electromagnetic activity frame is movably set in bottom support outside；
Workbench is arranged in the electromagnetic activity arch, for installing to-be-welded pieces；
Electromagnet connects the electromagnetic activity frame；
Wherein, the electromagnet can attract the bottom to support, and generate suspending power, drive the electromagnetic activity frame along phase
Bottom support is slided up and down, the workbench is held up；
Stirring-head is rotatably disposed in the bench-top, and can slide along the weld seam of to-be-welded pieces.
Preferably, the bottom, which supports, includes:
Supporting table, section is rectangular, and bottom has boss；
Support column, one end connect the supporting table bottom, and the other end is supported on lathe.
Preferably, the electromagnetic activity frame is " n " type.
Preferably, the table surface has convex stupefied, and the work edge of table has positioning screw hole, is capable of fixing
To-be-welded pieces.
Preferably, the stirring-head includes:
Stirring-head main body；
The shaft shoulder, stirring-head main body described in integrally connected are located at the stirring-head bottom part body；
Mixing needle, the shaft shoulder described in integrally connected are located at the shaft shoulder bottom.
Preferably, the mixing needle is equipped with the drainage trough that ecto-entad extends.
Preferably, the width of the drainage trough becomes larger from outside to inside.
Preferably, the bottom support is made of one or more of iron, cobalt, nickel material.
A kind of Friction Stir Welding is exerted oneself warm double control-type magnetic levitation worktable control method, comprising:
Step 1: welded workpiece is fixed on the table, the electrical current of electromagnet is set, workbench is made to be in outstanding
Floating state；
The calculation formula of the electrical current are as follows:
Wherein, I is electrical current, and x (t) is the gap between magnet and bottom support, and l is electromagnet inner core body length,
μrFor the core relative permeability in electromagnet, mkFor electromagnetic activity frame quality, mjFor to-be-welded pieces quality, μ0For air magnetic conductance
Rate；N is electromagnet coil the number of turns, and A is hybrid electromagnetic body magnetic pole area.
Step 2: setting stirring-head revolving speed, and welded workpiece is welded:
Wherein, ω is the mixing needle revolving speed of the friction welding shaft shoulder, and P reaches hot plastic state institute calorific requirement, R for weldment1
For shaft shoulder main body cylinder outer diameter, R2Stirring infinitesimal is stirring infinitesimal radius, and F is that the friction welding shaft shoulder acts on welded workpiece surface
Pressure.
Preferably, the step 2 further includes heat control process:
It is rubbed by embedded thermocouple and the pressure sensor detection being arranged between the workbench and the tape welding fitting
The wiping welding shaft shoulder acts on the temperature of welded workpiece mantle friction and the friction welding shaft shoulder acts on welded workpiece surface
Pressure calculates welding quality evaluation function:
Wherein, y is welding quality evaluation function, c1Constant, c are participated in for pressure2Constant, F are participated in for temperature0For conventional pressure
Power, T0For mean temperature, T (t) is the peak temperature that thermocouple detects, F (t) is the peak value pressure that pressure sensor detects
Power；
As y > y, electrical current size is adjusted, changes the pressure that the friction welding shaft shoulder acts on welded workpiece surface,
And then control of the realization to welding temperature；
The adjustment electric current calculation formula are as follows:
Wherein, ItTo adjust electric current, FrThe pressure on welded workpiece surface is acted on for the friction welding shaft shoulder, For average ratings coefficient, TqFor preferred temperature, HcFor the coercivity of permanent magnet.
Beneficial effect of the present invention
1, the present invention, which generates magnetism by electromagnet, can attract the bottom to support, and generate suspending power, hold up workbench,
Mechanical friction, contactless abrasion will not be generated and without lubrication, completely eliminate the crawling problems in mechanical transmission course.
2, the present invention, which changes polarity by Breake Electromagnet, can make permanent magnetic guideway generate thrust to Breake Electromagnet, make band
Weldment moves under magneticaction relative to stirring-head, and movement velocity is constant, and structure is simple, reduces failure rate, improves
Weldquality.
3, table surface of the invention has convex stupefied, can enhance heat dissipation effect.
4, it exerts oneself warm double control-type magnetic levitation worktable control method The present invention gives Friction Stir Welding, changes electromagnet
On electric current in welding process axial force and temperature value control, to obtain the weld seam of high quality.
Detailed description of the invention
Fig. 1 is that Friction Stir Welding of the present invention is exerted oneself the structural schematic diagram of warm double control-type magnetic levitation worktable.
Fig. 2 is the structural schematic diagram of bottom of the present invention support.
Fig. 3 is the structural schematic diagram of electromagnetic activity frame of the present invention.
Fig. 4 is that Friction Stir Welding of the present invention is exerted oneself another example structure of warm double control-type magnetic levitation worktable
Schematic diagram.
Fig. 5 is the structural schematic diagram of workbench of the present invention.
Fig. 6 is the structural schematic diagram of stirring-head of the present invention.
Fig. 7 is another example structure schematic diagram of the friction welding shaft shoulder of the present invention.
Fig. 8 is Hybrid suspension of electromagnets and permanent magnets system equivalent magnetic circuit of the present invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
The warm double control-type magnetic levitation worktable as shown in Figure 1, Friction Stir Welding provided by the invention is exerted oneself, comprising: bottom
Support 110, electromagnetic activity frame 120, workbench 130, electromagnet 140 and stirring-head 150.
Bottom support 110 is supported on lathe；Electromagnetic activity frame 120 is movably set in 110 outside of bottom support；Workbench
130 settings are at 120 top of electromagnetic activity frame, for installing to-be-welded pieces；Its connection electromagnetic activity frame 120 of electromagnet 140.Its
In, electromagnet 140, which generates magnetism, can attract bottom to support 110, generate suspending power, drive electromagnetic activity frame 120 along bottom branch
The boundary slip of support 110 holds up workbench 130；Stirring-head 150 can be slided along the bead direction of to-be-welded pieces, will when use
To-be-welded pieces 200 are fixed on workbench 130, and the suspension by adjusting the big minor adjustment workbench 130 of magnetic force of electromagnet 140 is high
Degree, be bonded stirring-head 150 with weld seam, and slides along weld seam, by the heat dissolution weldment of friction generation, makes the welding surface be in
Existing hot plastic state, then rapid upset, completes welding.
As shown in Fig. 2, bottom support 110 includes: supporting table 111 and support column 112,111 section of supporting table is rectangular, and
Bottom has boss 111a；112 one end of support column connects 111 bottom of supporting table, and the other end is supported on lathe.
As shown in figure 3, electromagnetic activity frame 120 is " n " type, two electromagnets 140 are separately connected the opening of electromagnetic activity frame
End, forms the frame structure for accommodating bottom support 110, and electromagnet 140 and the boss 111a of bottom support 110 are oppositely arranged.
As shown in figure 4, in another embodiment, Friction Stir Welding provided by the invention is exerted oneself warm double control-type magnetic suspension work
Make platform, comprising: bottom support 310, electromagnetic activity frame 320, workbench 330, electromagnet 340 and stirring-head 150.
Bottom supports 310 connecting working tables 310.Electromagnetic activity frame 320 is set in bottom support 310, electromagnetic activity frame
320 are supported on lathe, and there are two electromagnet 340 for electromagnetic activity frame both ends tool, and electromagnet 340, which generates magnetism, can attract bottom
Support 310 generates suspending power, workbench 310 is supported in electromagnetic activity frame 320, holds up workbench 130.
As shown in figure 5,130 surface of workbench have it is convex stupefied, heat dissipation effect can be enhanced, and 130 edge of workbench has
To-be-welded pieces 200 can be fixed on workbench 130 by positioning screw hole.
As a preference, bottom support 110 is made of one or more of iron, cobalt, nickel material.
As shown in fig. 6, stirring-head 150 includes: stirring-head main body 151, the shaft shoulder 152 and mixing needle 153；152 one of the shaft shoulder
Stirring-head main body 151 is connected, the stirring-head bottom part body is located at；The 151 integrally connected shaft shoulder 152 of mixing needle is located at the shaft shoulder 152
Bottom.Preferably, 153 surface of mixing needle is equipped with the drainage trough of ecto-entad extended segment, the width of drainage trough by it is outer from it is interior by
Flaring is big.
As shown in fig. 7, in another embodiment, a kind of Friction Stir Welding is exerted oneself warm double control-type magnetic levitation worktable, packet
Include: the setting of stirring-head 150 is at 130 top of workbench；Its setting of permanent magnetic guideway 410 is braked in bottom 110 two sides of support；Braking electricity
Magnet 420 is arranged in electromagnetic activity frame 120, and Breake Electromagnet 420, which changes polarity, can make to brake permanent magnetic guideway 410 to described
Breake Electromagnet generates thrust.Bottom can be attracted to support 110 in use, electromagnet 140 generates magnetism, generate suspending power, band
Dynamic electromagnetic activity frame 120 holds up workbench 130 along the boundary slip of bottom support 110；150 workbench 130 of stirring-head simultaneously can
Bead direction along to-be-welded pieces is slided, and to-be-welded pieces 200 are fixed on workbench 130 by when use, by adjusting electromagnet
The hoverheight of the big minor adjustment workbench 130 of 140 magnetic force, is bonded stirring-head 150 with weld seam, and Breake Electromagnet 420 changes
Polarity can make to brake permanent magnetic guideway 410 to Breake Electromagnet generation thrust, pass through the heat that friction generates and dissolve welding
Part makes welding surface that hot plastic state be presented, then rapid upset, completes welding.
Implement to make furtherly by taking the Friction Stir Welding firmly course of work of warm double control-type magnetic levitation worktable as an example
It is bright:
Firstly, to-be-welded pieces 200 are fixed on workbench 130, electromagnet 140 is powered, and holds up workbench 130, makes electricity
Magnet 140 and bottom support 110 have the gap greater than 10mm, make workbench relative to suspension stationary state, adjust electromagnet
The hoverheight of the big minor adjustment workbench 130 of 140 magnetic force, is bonded stirring-head 150 with weld seam, by sliding stirring-head 150
Or Breake Electromagnet 420 changes polarity and braking permanent magnetic guideway 410 can be made to generate thrust to the Breake Electromagnet, by rubbing
It wipes the heat generated and dissolves weldment, make welding surface that hot plastic state be presented, then rapid upset, complete welding.
A kind of Friction Stir Welding is exerted oneself warm double control-type magnetic levitation worktable control method, comprising:
As shown in figure 8, Step 1: on the table by welded workpiece fixation, setting the electrical current of electromagnet, making work
Make platform and be in suspended state, wherein electromagnet is made of core and coil, and core is permanent magnet, is mixed according to electromagnet and permanent magnet
Suspension system equivalent magnetic circuit figure calculates the active force between electromagnet and bottom support:
Magnetic circuit magnetic flux is calculated first:
Magnetic density:
In the suction of t moment:
It is derived by the calculation formula of electrical current are as follows:
Wherein, I is electrical current, and x (t) is the gap between magnet and bottom support, and l is electromagnet inner core body length,
μrFor the core relative permeability in electromagnet, mkFor electromagnetic activity frame quality, mjFor to-be-welded pieces quality, μ0For air magnetic conductance
Rate；N is electromagnet coil the number of turns, and A is hybrid electromagnetic body magnetic pole area, HcFor the coercivity of permanent magnet.
Step 2: setting stirring-head revolving speed, and welded workpiece is welded:
The torque generated on micro unit is calculated first:
The heat generated on micro unit:
The heat that Friction Stir Welding generates:
It is derived by and mixes friction welding shaft shoulder revolving speed:
Wherein, ω is the mixing needle revolving speed of the friction welding shaft shoulder, and P reaches hot plastic state institute calorific requirement, R for weldment1
For shaft shoulder main body cylinder outer diameter, R2Stirring infinitesimal is stirring infinitesimal radius, and F is that the friction welding shaft shoulder acts on welded workpiece surface
Pressure.
Heat control process:
Pass through the embedded thermocouple 211 and multiple pressure sensors being arranged between the workbench and the tape welding fitting
The 212 detection friction welding shaft shoulders act on the temperature T (t) of welded workpiece mantle friction and the friction welding shaft shoulder act on it is to be welded
The pressure F (t) of workpiece surface is met, welding quality evaluation function is calculated:
Wherein, y is welding quality evaluation function, c1For pressure-constant, numerical value 0.76, c2It is numerical value for thermal constant
For F0For average pressure, T0For mean temperature；
WhenWhen, electrical current size is adjusted, the pressure that the friction welding shaft shoulder acts on welded workpiece surface is changed,
And then control of the realization to welding temperature；
The adjustment electric current calculation formula are as follows:
Wherein, ItTo adjust electric current, FrThe pressure on welded workpiece surface is acted on for the friction welding shaft shoulder,For average ratings coefficient, numerical value 0.58, TqFor preferred temperature, HcFor the coercive of permanent magnet
Power.
It exerts oneself warm double control-type magnetic levitation worktable control method, changes on electromagnet The present invention gives Friction Stir Welding
Electric current in welding process axial force and temperature value control, to obtain the weld seam of high quality.The present invention passes through electricity
Magnet, which generates magnetism, can attract the bottom to support, and generate suspending power, hold up workbench, will not generate mechanical friction, nothing connects
Touching wears and without lubrication, completely eliminates the crawling problems in mechanical transmission course.The present invention is changed by Breake Electromagnet
Polarity can make permanent magnetic guideway generate thrust to Breake Electromagnet, transport tape welding fitting under magneticaction relative to stirring-head
Dynamic, movement velocity is constant, and structure is simple, reduces failure rate, improves weldquality.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
- The warm double control-type magnetic levitation worktable 1. a kind of Friction Stir Welding is exerted oneself characterized by comprisingBottom support, is supported on lathe；Electromagnetic activity frame is movably set in bottom support outside；Workbench is arranged in the electromagnetic activity arch, for installing to-be-welded pieces；Electromagnet connects the electromagnetic activity frame；Wherein, the electromagnet can attract the bottom to support, and generate suspending power, drive the electromagnetic activity frame along relative to The bottom support slides up and down, and holds up the workbench；Stirring-head is rotatably disposed in the bench-top, and can slide along the weld seam of to-be-welded pieces.
- The warm double control-type magnetic levitation worktable 2. Friction Stir Welding according to claim 1 is exerted oneself, which is characterized in that described Bottom supportsSupporting table, section is rectangular, and bottom has boss；Support column, one end connect the supporting table bottom, and the other end is supported on lathe.
- The warm double control-type magnetic levitation worktable 3. Friction Stir Welding according to claim 2 is exerted oneself, which is characterized in that described Electromagnetic activity frame is " n " type.
- The warm double control-type magnetic levitation worktable 4. Friction Stir Welding according to claim 3 is exerted oneself, which is characterized in that described Table surface have it is convex stupefied, and the work edge of table have positioning screw hole, be capable of fixing to-be-welded pieces.
- The warm double control-type magnetic levitation worktable 5. Friction Stir Welding according to claim 4 is exerted oneself, which is characterized in that described Stirring-head includes:Stirring-head main body；The shaft shoulder, stirring-head main body described in integrally connected are located at the stirring-head bottom part body；Mixing needle, the shaft shoulder described in integrally connected are located at the shaft shoulder bottom.
- The warm double control-type magnetic levitation worktable 6. Friction Stir Welding according to claim 5 is exerted oneself, which is characterized in that described Mixing needle is equipped with the drainage trough that ecto-entad extends.
- The warm double control-type magnetic levitation worktable 7. Friction Stir Welding according to claim 6 is exerted oneself, which is characterized in that described The width of drainage trough becomes larger from outside to inside.
- 8. Friction Stir Welding according to claim 1 or 5 is exerted oneself warm double control-type magnetic levitation worktable, which is characterized in that The bottom support is made of one or more of iron, cobalt, nickel material.
- The warm double control-type magnetic levitation worktable control method 9. a kind of Friction Stir Welding is exerted oneself characterized by comprisingStep 1: welded workpiece is fixed on the table, the electrical current of electromagnet is set, workbench is made to be in suspension State；The calculation formula of the electrical current are as follows:Wherein, I is electrical current, and x (t) is the gap between magnet and bottom support, and l is electromagnet inner core body length, μrFor electricity Core relative permeability in magnet, mkFor electromagnetic activity frame quality, mjFor to-be-welded pieces quality, μ0For air permeability；N is Electromagnet coil the number of turns, A are hybrid electromagnetic body magnetic pole area.Step 2: setting stirring-head revolving speed, and welded workpiece is welded:Wherein, ω is the mixing needle revolving speed of the friction welding shaft shoulder, and P reaches hot plastic state institute calorific requirement, R for weldment1For the shaft shoulder Main body cylinder outer diameter, R2Stirring infinitesimal is stirring infinitesimal radius, and F is the pressure that the friction welding shaft shoulder acts on welded workpiece surface Power.
- The warm double control-type magnetic levitation worktable control method 10. Friction Stir Welding according to claim 9 is exerted oneself, feature It is, the step 2 further includes heat control process:Friction welding (FW) is detected by the embedded thermocouple and pressure sensor that are arranged between the workbench and the tape welding fitting Spindle shoulder acts on the temperature of welded workpiece mantle friction and the friction welding shaft shoulder acts on the pressure on welded workpiece surface, Calculate welding quality evaluation function:Wherein, y is welding quality evaluation function, c1Constant, c are participated in for pressure2Constant, F are participated in for temperature0For normal pressures, T0 For mean temperature, T (t) is the peak temperature that thermocouple detects, F (t) is the surge pressure that pressure sensor detects；WhenWhen, electrical current size is adjusted, changes the pressure that the friction welding shaft shoulder acts on welded workpiece surface, in turn Realize the control to welding temperature；The adjustment electric current calculation formula are as follows:Wherein, ItTo adjust electric current, FrThe pressure on welded workpiece surface is acted on for the friction welding shaft shoulder, For average ratings coefficient, TqFor preferred temperature, HcFor the coercivity of permanent magnet.
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| CN201910787839.7A CN110394543B (en) | 2019-08-26 | 2019-08-26 | Friction stir welding force-temperature double-control type magnetic suspension workbench and control method thereof |
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| CN201910787839.7A CN110394543B (en) | 2019-08-26 | 2019-08-26 | Friction stir welding force-temperature double-control type magnetic suspension workbench and control method thereof |
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|---|---|---|---|---|
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