CN104708177B - A kind of measurement apparatus of tungsten electrode argon-arc welding electric arc power and measuring method - Google Patents
A kind of measurement apparatus of tungsten electrode argon-arc welding electric arc power and measuring method Download PDFInfo
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- CN104708177B CN104708177B CN201510044622.9A CN201510044622A CN104708177B CN 104708177 B CN104708177 B CN 104708177B CN 201510044622 A CN201510044622 A CN 201510044622A CN 104708177 B CN104708177 B CN 104708177B
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Abstract
The invention discloses a kind of measurement apparatus of tungsten electrode argon-arc welding electric arc power and measuring method, belong to arc technology field.Described measurement apparatus include balance plate, balancing weight, supporting plate, asbestos heat Insulation film, fixing bolt, cross laser device, spring, gag lever post, fixation clamp, spirit bubble, bearing block, deep groove ball bearing, linear bearing, bearing rod, bracing frame and scale.It is mainly used in the measurement of the arc force of argon tungsten-arc welding and the welding method based on argon tungsten-arc welding, it is possible to achieve the measurement of common metal material welding arc power.Measuring principle is based on lever law and Hooke's law, and measurement process is simple, and measurement error is little；The present invention can arc force that really reacting metal material and electric arc produce under interaction；Improve the limitation narrow meshed water-cooled copper plate being used as test block, measurement result is truer；Simultaneously, it is to avoid using the interference of electromagnetic field during sensor measurement.
Description
Technical field
The invention belongs to arc technology field, it is applied to analyze Gas Tungsten Arc Welding electric arc comprehensive function and in particular to a kind of tungsten electrode
Argon arc welding electric arc force test device and method.
Background technology
Argon tungsten-arc welding is applied to the welding of most metal and alloy, and the metal of available Tig Welding and alloy include
Carbon steel, steel alloy, rustless steel, heat-resisting alloy, refractory metal, aluminium alloy, magnesium alloy, beryllium alloy, copper alloy, nickel alloy,
Titanium alloy and zircaloy etc., and welding quality is higher.With the requirement producing and put into practice, arteries and veins on the basis of argon tungsten-arc welding
Rush argon arc welding, active argon arc welding etc. and also obtain rapid application.Physical characters of arc is served not with molding to the quality of weld seam
Negligible impact.The research of wherein arc force is one of emphasis, difficult point.Arc force affects the geometry in molten bath, weld seam
Molding etc., so finally also determine the quality of welding point.It can be seen that the measurement means research of arc pressure is to improving welding pool
The quality of pattern and raising welding point has great significance.
Both at home and abroad two kinds are probably divided into the method for testing of arc force at present：One is to use glass-tube barometric surveying, and the method is with U
Type pipe liquid level difference is conversing arc force.Two is the continuous mode method using pressure transducer.Both there are its advantage, Qian Zhecao
Work gets up fairly simple directly perceived, it is easy to accomplish, the latter then can realize measuring in real time.But both the above method also respectively has it not
In place of foot.Glass-tube barometric surveying generally uses water-cooled copper plate with holes as test block, not only can not reflect the real material of welding
With the interactively of electric arc, and aperture also can produce certain impact to electric arc.Especially carrying out active argon arc welding arc force
During test, aperture portion can not coat activating agent.And adopt sensor continuous mode method equipment complex and relatively expensive,
And it is not fee from the impact to sensor for high temperature during welding, the electromagnetic interaction in welding process also can have to its result simultaneously
Certain impact.Therefore find a kind of rational electric arc force test method and there is important actual application value.
Content of the invention
Present invention aim at providing a kind of device and method of test arc force, being mainly used in argon tungsten-arc welding and being based on tungsten electrode argon
The measurement of the arc force as active argon arc welding, pulsed argon arc welding etc. for the welding method of arc-welding, it is possible to achieve common metal material welds
The measurement of arc force.Measuring principle is based on lever law and Hooke's law, and measurement process is simple, and measurement error is little.
A kind of measurement apparatus of tungsten electrode argon-arc welding electric arc power that the present invention provides, described measurement apparatus include passive
Bracing frame；Be machined with the aluminium alloy cuboid balance plate of slideway, counterweight tank, two being connected with bracing frame bearing block, two with
The deep groove ball bearing that bearing block cooperation is installed, reeded two linear bearings of the band being arranged in balance plate slideway, with bearing block
Upper deep groove ball bearing and the supporting bearing rod of linear bearing, make device maintain the balancing weight of balance, are arranged on electric arc working end and carry
There is fixing aperture to play the supporting plate of support effect, be arranged on the asbestos heat Insulation film playing heat-blocking action between supporting plate and balance plate, connect support
Plate and the fixing bolt of balance plate an electric action, are arranged on the cross laser device of the balance plate other end, are arranged on balance plate
Act the spirit bubble of the level that monitors whether, connect the spring of bracing frame and balance plate end, play fixing and clamping action fixation clamp,
Prevent because arc force (or gas blowing force) effect leads to electric arc working end to produce the gag lever post of up-down vibration in test process,
The scale of measured value.Measurement apparatus are provided with electric arc working end and are lined with asbestos heat Insulation film between supporting plate and supporting plate and balance plate,
It is drilled with the aperture of same size between supporting plate, asbestos heat Insulation film and balance plate and fixed with fixing bolt so that balance plate can
Bearing high temperature can not be affected still to be formed current loop by heat-barrier material again.Can be very using the spring in described measurement apparatus
Precisely sensitively react arc force.Counterweight tank and balancing weight not only can balance systems and can offset gas shielded arc welding gas and blow
Power.Arc force acts on the opposite side of measurement end, is indirectly measured by balance plate, and solving high-temperature electric arc can not be direct
Act on the problem of measurement end.
The present invention also provides a kind of measuring method of tungsten electrode argon-arc welding electric arc power, and described measuring method comprises the following steps：
The first step, test block is placed on supporting plate, and the slideway of adjustment plate with the relative position of linear bearing and carries out counterweight
Make test device be in poised state (viewing spirit bubble state), and make spring be in micro- tensioning state；
Second step, measurement spring upper end point is to vertical dimension l of bearing rod axis respectively1And balance plate arcing end is to bearing rod
Vertical dimension l of axis2.Measurement bearing rod axis to scale apart from L, and labelling cross laser be radiated on scale just
Beginning number A1；
3rd step, opens welding gun power supply, and adjustment welding parameter simultaneously records；
Arc force is acted on by test block by welding gun, and welding gun is horizontally and perpendicularly to balance plate major axis with even speed and is moved
Dynamic.Observe and record the reading A on scale2；
4th step, closes welding gun power supply, takes off test block from test device；
5th step, calculates arc force；
According to difference of reading Δ=A twice on scale2-A1, tan δ=(Δ)/L, tan δ=Δ '/l1, try to achieve change under arc force effect for the spring
Change amount Δ '.Spring force F is tried to achieve according to Hooke's law1=K Δ ', then by lever law F1·l1=Fcos δ l2, obtaining arc force is F.
The beneficial effects of the present invention is：
1. the present invention breaks through conventional electric arc force measuring method, application lever principle and Hooke's law, simply and accurately measures
The size of arc force.
2. sample is placed on supporting plate, electric arc directly acts on metal material, can really reacting metal material and electric arc exist
Interact the lower arc force producing；Improve the limitation narrow meshed water-cooled copper plate being used as test block, measurement result is more
Plus it is true；Simultaneously, it is to avoid using the interference of electromagnetic field during sensor measurement.
Brief description
Fig. 1 is the structural representation of non-melt pole electrical arc force test device；
Fig. 2 is the generalized section of the supporting plate, asbestos heat Insulation film and balance plate at arcing end；
The principle schematic of Fig. 3 position non-melt pole electrical arc force test device.
In figure：
| 1. balance plate； | 2. balancing weight； | 3. supporting plate； | 4. asbestos heat Insulation film； | 5. fixing bolt； |
| 6. cross laser device； | 7. spring； | 8. gag lever post； | 9. fixation clamp； | 10. spirit bubble； |
| 11. bearing blocks； | 12. deep groove ball bearings； | 13. linear bearings； | 14. bearing rods； | 15. bracing frames； |
| 16. welding guns； | 17. test blocks； | 18. scales； | 19. supports. |
Specific embodiment
The measurement apparatus of tungsten electrode argon-arc welding electric arc power and its measuring method is provided to carry out specifically the present invention with reference to Fig. 1～Fig. 3
Bright.
As shown in figure 1, the measurement apparatus of the tungsten electrode argon-arc welding electric arc power of present invention offer include balance plate 1, balancing weight 2, supporting plate
3rd, asbestos heat Insulation film 4, fixing bolt 5, cross laser device 6, spring 7, gag lever post 8, fixation clamp 9, spirit bubble 10, axle
Bearing 11, deep groove ball bearing 12, linear bearing 13, bearing rod 14, bracing frame 15 and scale 18.
Balance plate 1 is aluminium alloy cuboid (interior hollow) structure, and balance plate 1 two sides are processed with angle grinder respectively
The slideway 101 of 27mm*100mm, the balance for adjustment plate 1 and the length of the arm of force；Slideway 101 both sides are respectively
The working end of balance plate 1 and measurement end, wherein, are machined with linear grooves for hanging spring 7 below the measurement end of balance plate 1,
Spring 7 vertically hangs in the middle of balance plate 1 and gripper shoe 15, and when described balance plate 1 is in horizontality, spring 7 is in and draws
The state of stretching parts a little tightly；Cross laser device 6, balancing weight 2 and spirit bubble is from left to right set gradually above the measurement end of balance plate 1
10；The working end upper surface of balance plate 1 sets gradually asbestos heat Insulation film 4 and supporting plate 3 from top to bottom, and supporting plate 3 is used for support and surveys
Test block 17.Described balance plate 1, asbestos heat Insulation film 4 and supporting plate 3 are connected by two fixing bolts 5, as shown in Fig. 2
Fixing bolt 5 two ends attaching nut, fixing bolt 5 solves and is mingled with asbestos heat Insulation film 4 between supporting plate 3 and balance plate 1, no
The problem of current loop can be constituted, play electric action.
Described balancing weight 2 adopts standard test weight, suitably puts in counterweight tank 102, with the weight of balancing side test block 17.Described
Counterweight tank 102 a size of 50mm*50mm, processing is on balance plate 1 near the surface of measurement.
Described supporting plate 3 adopts 3mm thickness Q235 steel plate, is processed into the size of 70mm*50mm.Described asbestos heat Insulation film 4
Thick for 6mm, it is cut into 70mm*30mm tabular.Asbestos heat Insulation film 4 is in order to completely cut off the high temperature producing during welding, it is to avoid aluminum
Alloy balance plate 1 electric arc working end is melted.Cross laser device 6 irradiation distance is 3～4m, is fixed on the measurement end of balance plate 1 simultaneously
Connect power supply；Its cross laser line is irradiated on scale 18, can facilitate readout value.Spring 7 elastic stiffness K scope
0.1～0.3N/mm, can indirectly calculate the size of arc force according to its Flexible change amount in measurement process.Gag lever post 8 two ends are fixed
On the support in gripper shoe 15, within height distance balance plate 1 upper surface 1mm, apart from bearing rod 14 right side 3cm, limit
Position bar 8 be in order to prevent arcing on test block 17 when, due to balance plate 1 produce vibration make test block 17 and tungsten electrode straight
Contact adhesion.Fixation clamp 9 uses 3mm steel plate, is cut into two 30mm*50mm plates respectively, as intermediate plate.Using
Wire cutting processes the circular hole of 29mm in its centre, processes 6mm circular hole at its two ends.Two long bolts are each passed through 6mm
Two intermediate plates are connected by circular hole, and using nut fastening；The circular hole of middle 29mm is used for fixing linear bearing 13.Fixation clamp 9
It is used for clamping balance plate 1 and linear bearing 13, prevent from sliding after adjustment balance.Spirit bubble 10 in order to observe balance plate 1 is
No it is in poised state.Bearing block 11 internal diameter is 29mm, for installing deep groove ball bearing 12 and playing a supporting role；Zanjon
Ball bearing 12 external diameter is 29mm, and internal diameter is 20mm, can reduce system because rubbing and the error of generation, with bearing block 11
Use cooperatively；Linear bearing 13 external diameter is 29mm, internal diameter 20mm, and length is 30mm, and processes fluted, described
Linear bearing 13 has two, is respectively fitted on two intermediate plates of fixation clamp 9, the end of linear bearing 13 outer wall is machined with simultaneously
One circle groove, (described groove is it can be appreciated that be a diameter 27mm of linear bearing 13 end for depth of groove 1mm
Extension), the slideway 101 on such balance plate 1 just can with the matching ends of described groove, limit balance plate 1 exist
The movement of linear bearing 13 axis direction, and adjustment plate 1 arm of force length frictional force in short-term can be reduced.Bearing rod 14
Length 400mm, a diameter of 20mm, chrome-faced makes surfaces slippery enough.Bracing frame 15 uses Q235 steel plate, by handss
Bracing frame 15 is coupled together by work arc welding with support 19.Welding gun 16 is placed on dolly it is ensured that steady in experiment with measuring process
Uniform motion.Test block 17 is processed into, from actual metallicses to be measured, the test plate (panel) that thickness is less than the 100mm*30mm of 10mm.
1 meter of length selected by scale 18, and minimum range is the ruler of 0.5mm.
As shown in figure 1, being provided with a pair of vertical rack 19 on bracing frame 15, two bearings seat 11 is separately mounted to two supports 19
On, two deep groove ball bearings 12 are carried out respectively cooperation with two bearing blocks 11 and install；Two linear bearings 13 are separately mounted to put down
In the slideway 101 of weighing apparatus plate 1 two sides；Fixation clamp 9 is enclosed within linear bearing 13, bearing rod 14 passes through on balance plate 1
Two side slideways 101, two ends are separately fixed on the deep groove ball bearing 12 and linear bearing 13 of both sides.
Based on above-mentioned measurement apparatus, the present invention also provides a kind of measuring method, and in conjunction with Fig. 3, described measuring method includes following
Step：
The first step, test block 17 is placed on supporting plate 3, and the slideway 101 of adjustment plate 1 is simultaneously joined by balancing weight 2
Weigh so that test system is in poised state (viewing spirit bubble 10 state), and make spring 7 be in micro- tensioning state and (draw
Stretch state)；
Second step, in the state of the equilibrium, measurement spring 7 arrives vertical dimension l of bearing rod 14 axis respectively1And balance plate 1 electric arc
Working end is to vertical dimension l of bearing rod 14 axis2.As shown in figure 3, measuring bearing rod 14 axis to scale 18 apart from L,
And labelling cross laser device 6 is radiated at initial value A on scale 181；
3rd step, opens welding gun 16 power supply, and adjustment welding parameter simultaneously records；Described welding parameter includes welding current and speed
Deng.
Welding gun 16 is horizontally and perpendicularly to balance plate 1 major axis with even speed and moves, and arc force F is acted on test block 17,
Electric arc force direction is straight down.Balance plate 1 working end stress is verted downwards, and measurement end rises working end and declines, after stablizing
Observe and record the reading A on now scale 182；
4th step, closes welding gun 16 power supply, takes off test block 17 above test system；
5th step, calculates；
Known by Fig. 3, on scale 18 before and after number of degrees difference DELTA=A2-A1, tan δ=(Δ)/L, tan δ=Δ '/l1, δ deflects for balance plate 1
Angle, tries to achieve length change amount Δ ' under arc force F effect for the spring 7.Try to achieve the elastic force F of spring 71=K Δ ', then by thick stick
Bar law F1·l1=Fcos δ l2(in the presence of arc force, balance plate 1 has deflected a low-angle δ, so acting on balance
The arc force of plate 1 right-hand member is Fcos δ, cos δ ≈ 1), obtaining arc force is F.
In order that measurement is more accurate, need in measurement process to follow following principle：
1. bearing block 11 and bearing class (including deep groove ball bearing 12 and linear bearing 13) want regular coating lubricating oil, to ensure
Friction is less；
2., when high temperature action bottom plate 3 occurs loss, supporting plate 3 need to be regularly replaced；
3. scale 18 is put and must be vertically placed on the major axis extended line of balance plate 1, and is located at cross laser device dead ahead,
Remain 3m with the distance between bearing rod 14 it is ensured that cross laser line can be radiated on scale 18 all the time, to reduce
Error during measurement distance；
4. same test need to be repeated 3 times above, give up the larger value of error and calculate meansigma methodss；
5. gag lever post 8 installation site must be able to strictly to control balance plate 1 electric arc end balancing or balance following position, otherwise due to
Can contact with tungsten electrode during arc force effect balance plate 1 vibration；
6. fixation clamp 9 will be tightened after adjustment equilbrium position, prevents balance plate 1 double swerve impact measurement result；
7. balancing weight 2 is placed in counterweight tank 102 and must stablize, and prevents from rocking the impact to measurement result.
Embodiment 1 Tungsten Inert Gas Welding Arc power is tested
Test supporting plate 3 adopts Q235 steel plate, the welding parameter such as table 1 of argon tungsten-arc welding, and the elastic stiffness of spring 7 is selected and is
0.1N/mm.
Table 1 argon tungsten-arc welding process parameter
| Welding current | Tungsten electrode diameter | Speed of welding | Arc length | Argon flow amount | Tungsten electrode wedge angle | Tungsten electrode material | Ceramic nozzle |
| 145A | 2.0mm | 120mm/min | 3.5mm | 6L/min | 45° | Cerium tungsten electrode | 8# |
Scale 18 distance between bearing bar 14 axial line distance L is 3m.Test block 17 is placed on supporting plate 3, in counterweight tank 102
Plus counterweight (balancing weight 2) the relative position that adjusts between slideway 101 and linear bearing 13 makes balance plate 1 to poised state,
Record l1For 300mm, l2For 600mm.The record now reading A on scale 181For 153mm.Open argon tungsten-arc welding
Power supply, adjusts welding parameter and is welded.Cross laser on scale 18 starts reading when tending towards stability, and records now
Reading A on scale 182For 201.5mm.Disconnect the source of welding current, take off test block 17.Carry out data compilation.On scale 18
Reading variation delta be 48.5mm, by tan δ=(Δ)/L, tan δ=Δ '/l1,The variation delta ' trying to achieve spring 7 is 4.85mm.Institute
With spring force F1=0.1N/mm*4.85mm=0.485N.According to formula F1·l1=Fcos α l2, trying to achieve arc force F is 0.243N.
Embodiment 2 activating-tungsten inert gas welding arc force is tested
Test supporting plate 3 adopts Q235 steel plate, the welding parameter such as table 1 of argon tungsten-arc welding, and the elastic stiffness of spring 7 is selected and is
0.1N/mm.The main component of activating agent is TiO2,Cr2O3,ZrO2And CaF2Deng.Before test, Agent Powder acetone is adjusted
With become solution, be then evenly coated on supporting plate 3 with flat hairbrush, in coating process as much as possible ensure apply uniformity.
L, l in test1、l2All constant, make device be in poised state by balancing weight 2.The now initial reading A on scale 181
For 153mm.Open argon tungsten-arc welding power supply, adjust welding parameter and welded.Treat that the cross laser on scale 18 tends to
Start reading when stablizing, and record now reading A2For 224mm.By tan δ=(Δ)/L, tan δ=Δ '/l1,Try to achieve the variable quantity of spring
Δ ' is 7.1mm.So spring force F1=0.1N/mm*7.1mm=0.71N.According to formula F1·l1=Fcos α l2, try to achieve electric arc
Power F is 0.355N.
Claims (3)
1. a kind of measurement apparatus of tungsten electrode argon-arc welding electric arc power it is characterised in that：Described measurement apparatus include balance plate, balancing weight,
Supporting plate, asbestos heat Insulation film, fixing bolt, cross laser device, spring, gag lever post, fixation clamp, spirit bubble, bearing block, depth
Ditch ball bearing, linear bearing, bearing rod, bracing frame and scale；
A pair of vertical rack is provided with bracing frame, two bearings seat is separately mounted on two supports, and two deep groove ball bearings are divided
Do not carry out cooperation with two bearing blocks to install；Two linear bearings are separately mounted in the slideway of balance plate two sides；By fixation clamp
Two intermediate plates be respectively fitted on two linear bearings, bearing rod pass through balance plate on two side slideways, two ends are separately fixed at two
On the deep groove ball bearing of side and linear bearing；
Balance plate is cuboid hollow-core construction, and two sides process slideway respectively, and balance plate two ends are respectively electric arc working end and measurement
End, wherein, below measurement end hang spring, spring vertically hangs in the middle of balance plate and gripper shoe, above the measurement end of balance plate from
Left-to-right set gradually cross laser device, balancing weight and spirit bubble；The working end upper surface of balance plate sets gradually stone from top to bottom
Cotton heat Insulation film and supporting plate, supporting plate is used for support test block；Described balance plate, asbestos heat Insulation film and supporting plate pass through two fixing bolts
It is connected, fixing bolt two ends attaching nut；
On the fixing support on the supporting plate in gag lever post two ends, within height distance balance plate upper surface 1mm, right apart from bearing rod
Side 3cm；Gag lever post be in order to prevent arcing on test block when, due to balance plate produce vibration make test block straight with tungsten electrode
Contact adhesion；Scale is vertically placed on the major axis extended line of balance plate, and is located at cross laser device dead ahead it is ensured that ten
Word laser rays are radiated on scale all the time；
When described balance plate is in horizontality, spring is in extended state tensioning.
2. a kind of tungsten electrode argon-arc welding electric arc power according to claim 1 measurement apparatus it is characterised in that：Described supporting plate and
Support adopts Q235 steel plate, spring stiffness K scope 0.1～0.3N/mm.
3. a kind of measuring method of tungsten electrode argon-arc welding electric arc power it is characterised in that：Using a kind of tungsten argon arc providing in claim 1
The measurement apparatus of weldering arc force, described measuring method comprises the following steps,
The first step, test block is placed on supporting plate, and the slideway of adjustment plate with the relative position of linear bearing and carries out counterweight
Make test device be in poised state, and make spring be in tensioning state；
Second step, measurement spring upper end point is to vertical dimension l of bearing rod axis respectively1And balance plate arcing end is to bearing rod
Vertical dimension l of axis2；Measurement bearing rod axis to scale apart from L, and labelling cross laser be radiated on scale just
Beginning number A1；
3rd step, opens welding gun power supply, and adjustment welding parameter simultaneously records；
Arc force is acted on by test block by welding gun, and welding gun is horizontally and perpendicularly to balance plate major axis with even speed and is moved
Dynamic, observe after stablizing and record the reading A on scale2；
4th step, closes welding gun power supply, test block is taken off；
5th step, calculates arc force；
According to difference of reading Δ=A twice on scale2-A1, tan δ=(Δ)/L, tan δ=Δ '/l1, try to achieve change under arc force effect for the spring
Change amount Δ ', tries to achieve spring force F according to Hooke's law1=K Δ ', then by lever law F1·l1=Fcos δ l2, obtaining arc force is F；
Wherein, δ is balance plate deflection angle, and K is spring rigidity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044622.9A CN104708177B (en) | 2015-01-28 | 2015-01-28 | A kind of measurement apparatus of tungsten electrode argon-arc welding electric arc power and measuring method |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201510044622.9A CN104708177B (en) | 2015-01-28 | 2015-01-28 | A kind of measurement apparatus of tungsten electrode argon-arc welding electric arc power and measuring method |
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| CN104708177B true CN104708177B (en) | 2017-03-01 |
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| CN106289608B (en) * | 2016-08-02 | 2018-11-13 | 北京航空航天大学 | A kind of device and method measuring welding arc axial force |
| CN109190260B (en) * | 2018-09-07 | 2020-08-18 | 华中科技大学 | Laser-arc hybrid welding three-dimensional transient numerical simulation method |
| CN113966066B (en) * | 2021-10-25 | 2022-08-09 | 中国原子能科学研究院 | Working platform and method for realizing target rod swinging of stripped target in narrow space |
Family Cites Families (9)
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|---|---|---|---|---|
| SU518295A1 (en) * | 1974-09-12 | 1976-06-25 | Предприятие П/Я М-5841 | Device for measuring welding arc pressure |
| SU709293A1 (en) * | 1978-07-12 | 1980-01-15 | Московское Ордена Ленина И Ордена Трудового Красного Знамени Высшее Техническое Училище Им.Баумана Н.Э. | Apparatus for measuring electromagnetic forces in conducting media |
| SU1668072A1 (en) * | 1989-02-24 | 1991-08-07 | Мариупольский металлургический институт | Method for measuring electromagnetic force of welding circuit |
| RU2055333C1 (en) * | 1991-12-23 | 1996-02-27 | Волгоградский Политехнический Институт | Device for measuring forcing moment of electromagnet exciter provided with a rotatable armature |
| JP2004117198A (en) * | 2002-09-26 | 2004-04-15 | Aisin Seiki Co Ltd | Load detecting device |
| CN201455508U (en) * | 2009-05-27 | 2010-05-12 | 北京工业大学 | Device for measuring arc pressure distribution and current density distribution |
| CN201618905U (en) * | 2010-03-03 | 2010-11-03 | 中国人民解放军装甲兵工程学院 | Electric arc pressure testing device |
| CN202129537U (en) * | 2011-04-08 | 2012-02-01 | 北京工业大学 | Device for jointly testing arc current density distribution and arc pressure distribution |
| CN102528228B (en) * | 2012-03-01 | 2014-05-07 | 北京航空航天大学 | Platform for measuring average arc force of superaudio-frequency pulse TIG (Tungsten Inert Gas) welding |
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