CN104493357A - Mechanical loading diffusion welding device - Google Patents
Mechanical loading diffusion welding device Download PDFInfo
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- CN104493357A CN104493357A CN201410676974.1A CN201410676974A CN104493357A CN 104493357 A CN104493357 A CN 104493357A CN 201410676974 A CN201410676974 A CN 201410676974A CN 104493357 A CN104493357 A CN 104493357A
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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
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
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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
- B23K20/26—Auxiliary equipment
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides a mechanical loading diffusion welding device which is simple in structure and convenient to operate, which has high generality and constant pressure and which is free of a large-scale temperature control device and complex part clamping device. By the aid of the technical scheme, a heating system comprises a heating furnace (16) with a built-in high frequency sensing power supply heating device and supplies energy for welded part surface atom diffusion; a load converting clamp (17) arranged in the heating furnace (16) is connected between an upper spherical connecting seat (19) and a lower spherical connecting seat (13) through a transmission rod (14); a drive gear pair (10) drives a lifting screw (9) through a rotary adjusting hand wheel (12) or fine adjusting hand wheel (11); the load converting clamp (17) converts the pull force supplied by a load system into the pressure for a part to be welded; the load system performs welding through the pressure, converted from the own pull force through the load converting clamp, applied to the welding surface.
Description
Technical field
The present invention relates to a kind of diffusion welding (DW) device for being connected between plasticity difference or the of the same race and foreign material of fusing point and heat proof material, multilayer material, being specifically related to a kind of mechanical load Diffusion Welding device with load steering clamp.
Background technology
Along with the development of material science, new material continues to bring out.In production application, often run into the connectivity problem of dissimilar metal.The method of welding dissimilar metal is more, mainly contains ultrasonic bonding, melting welding, solid phase pressure weldering, melting welding-soldering and liquid phase transition weldering etc.The welding procedure of some profile complex thin-wall workpiece, because bonding area is large, weld strength requires high, realizes such welding procedure and usually adopts Diffusion Welding.Diffusion Welding can not only complete the welding of same material, and can complete the welding between foreign material, is a kind of solid phase connecting method obtaining integral joint.Its weld strength is several times of general Welding intensity.Diffusion welding (DW) has: the microscopic structure of (1) Diffusion Bonded Joint is close or identical with mother metal with performance, there is not fusion defects; (2) welding temperature is low, and mother metal damage is little; (3) inside and multiple spot, large-area welding can be carried out; (4) Light deformation, little stress, high-accuracy; (5) be suitable for being connected between the of the same race and xenogenesis of plasticity difference or fusing point and heat proof material, multilayer material; (6) surface preparation requires high; (7) welding and non-cutting time long; (8) equipment one-time investment is large, and workpiece size is subject to the welding characteristic of equipment restriction.Diffusion welding craft is usually complicated, and equipment volume is large.Thin-wall part will complete the welding between ectonexine, and nature can produce larger distortion under the high temperature conditions, if horizontal positioned, under gravity, will produce ovalizing deflection; If vertically place, bottom heap compressive strain will be produced.For improving weld strength, prevent the oxidation of solder side, the interlayer between inside and outside wall must vacuumize or pass into inert gas and carry out atmosphere protection.Therefore in welding, normally on special device, make it unsettled trade union college, and Rotating with Uniform control workpiece deformation in welding process at a slow speed.Again, according to material performance determination heating rate at different temperatures and temperature retention time.Diffusion welding (DW) is under vacuum or inert ambient environment, by two test specimen close contacts to be welded, is heated to lower than solidus temperature (T=0.5-0.8T
m).Materials to be welded produces microplasticity stream and becomes and reach close contact under high moderate pressure effect, makes interface atom phase counterdiffusion or solid phase reaction, produces atom and combines thus form firmly integral joint.Meanwhile, in temperature-rise period, workpiece " heart table " temperature difference can not be too large, and furnace atmosphere can not be contaminated, to reduce oxidation and residual stress.The technical process of above-mentioned complexity makes firing equipment also become complicated.
Diffusion Welding must apply certain extruding force under diffusion welding (DW) temperature conditions on of the same race or welding dissimilar materials face, and the size of extruding force is different because of the difference of welding material.The localized contact plastic deformation of joint interface institutional framework interface, impels oxide-film fragmentation to decompose.When reach wash one's face contact time, occur to spread between welding material atom, the oxide simultaneously on interface is by solution absorption, then recrystallized structure growth, crystal boundary moves, sometimes raw brilliant the and intermetallic compound of appearance connection, through forming firm welding point integrally after a period of time.The formation of Diffusion Bonding Joint roughly can be divided into three phases, and the first stage is the physical contact of material surface, in order to two test specimens to be welded obtain desirable connection, within the distance that them must be made as far as possible to be close to be enough to set up metallic bond.The surface of the microcosmic injustice contacted with each other is under the effect of high temperature and pressure, and microscopic protrusions position plastic deformation can occur, and uneven contact surface can by flattening-out, and actual contact area constantly increases.Second stage is the interatomic phase counterdiffusion of contact interface, actual contact surface forms rear continuation heating and plastic deformation can make the energy of lattice Atom and mobility increase, the atom of connector area can be activated and move, new equilbrium position is entered by original equilbrium position, spread mutually, the degree of depth connected expands gradually, and firmly binder course is constantly formed, and the little space of part still remains in crystal grain.Phase III is the formation of reliable joints.Because material at high temperature Recovery and recrystallization can occur, this stage will eliminate remaining microcosmic discontinuity and defect, and the binder course that contact phase is formed, gradually to volume future development, finally forms reliable jointing.The hole that wherein plumb joint is formed because of non-seam is the initial imperfection of joint, and hole Micro-v oid axially broadens along loading with increasing of cycle-index; Hole is expanded and caused loaded area to reduce is the main cause that joint fatigue lost efficacy.
Traditional Vacuum diffusion bonding furnace design adopts electrohydraulic servo system, through development for many years, system architecture is relative maturity, but still there are some intrinsic shortcomings, as: vacuum heating system pressure apparatus adjust that threshold values high and low pressure force value control accuracy is poor, there is certain pollution etc. to environment in hydraulic oil in electro-hydraulic device, therefore, electrohydraulic servo system can not meet the technical requirement of novel Diffusion Welding.Diffusion Welding device provides stable and moderate pressure to soldered surface requirements, pressure between composition surface is that elimination or minimizing surface microscopic are uneven, the direct contact surface area of increase material, to such an extent as to reach the essential condition of atomic distance, the major effect first stage.There is the suitable scope of needs one in applied pressure, the excessive and too small raising being all unfavorable for strength of joint.If hypotony, the plastic deformation on welded surface is not enough, and physical contact surface atomic distance is greater than the distance setting up metallic bond, and between atom, repulsive force plays a leading role, and causes atoms permeating not enough, and hole residual on interface is excessive and too much; Too high diffusion pressure can produce larger surface plastic deformation, welded Surface Recrystallization temperature reduction can be made, accelerate crystal boundary migration, also liquid metal will be made to extrude too much, in joint, remaining liquid intermediate layer is very few, interaction (soak, fill, dissolve, spread) to a certain degree can not be produced with mother metal, reduce diffusion effect equally, cause joint performance to be deteriorated.Therefore, the pressure that Diffusion Welding device provides will directly affect diffusion welding (DW) result.As pressurizeed with airbag aeration or adding backing plate pressurization, mould structure is complicated, if diffusion joint face protects bad meeting to cause oxidation, affects bonding strength.
The pressing mechanism of diffusion welding (DW) generally has machinery (hydraulic pressure) formula to account for 65%, thermally expansive accounts for 11%, HIP (HotIsostatic Pressing) formula accounts for 24%.The pressing jig of tradition mechanical type diffusion welding (DW) is generally by train wheel bridge, and lower plate, cavity, guide pillar and nut form.Pressure to strain guide pillar, thus drives upper and lower clamping plate that tightening force is applied to soldered surface by tightening nuts.Its weak point is, during prestrain, applied pressure is after pressure apparatus is heated together with soldering part, and thermal expansion occurs, and the pressure acting on soldered surface will decline, and cause welded surface atom to spread not enough, after welding, intensity reduces, and does not even combine; If provide excessive precompression before heating, after adding thermal expansion, pressure not only cannot be measured, and soldered piece surface also can be caused to produce large plastic deformation, not only affects accessory size and also may reduce weld strength.The larger titanium alloy of physicochemical property difference spreads to be connected to study with copper alloy and also runs into very large difficulty, and especially polynary precision friction is paid class tube-in-tube structure part (advanced aero engine Constant-Speed Unit) and not yet succeeded so far.In addition, conventional diffusion welding equipment versatility is poor, and cost is higher.Especially Vacuum diffusion bonding furnace exist bulky, pressure rise adjust threshold values high, be heated to the problems such as metal molten warm mechanics temperature work period long, production efficiency is low, oil pollution.
Summary of the invention
In order to solve conventional diffusion welder because heating the insufficient pressure caused and the shortcoming that cannot accurately control, the present invention seeks to the weak point existed for prior art, there is provided a kind of structure simple, easy and simple to handle, highly versatile, constant pressure, does not need the large-scale mechanical load diffusion welding (DW) device rising temperature regulating device and complicated parts retainer.
The technical solution used in the present invention is: a kind of mechanical load Diffusion Welding device, comprise loading system, temperature-controlling system and the load transfer fixture that welding pressure is provided, loading system mainly comprises connecting firmly is amplifying the front column 18 between lever 2 and pedestal 5, rear column 3 and the elevating screw 9 rotated by gear driving pair 10, temperature-controlling system mainly comprises temperature-controlling system and mainly comprises perpendicular to above pedestal 5, the heating furnace 16 connected firmly by fixed axis 15, it is characterized in that: heating furnace 16 is by built-in high-frequency induction heating power heater composition heating system, for welded piece surface atoms permeating provides energy, be arranged on load transfer fixture 17 in heating furnace 16 by transmission rod 14, be connected between spherical Connection Block 19 and lower spherical Connection Block 13, gear driving pair 10 is by rotating adjusting handle 12 or trimming hand wheel 11, drive elevating screw 9, pulling force loading system provided by load transfer fixture 17 converts the pressure of part to be welded to, the pulling force of loading system to be converted to by load transfer fixture and to weld the pressure of face of weld by loading system.
Compared with existing diffusion welding (DW) device, the present invention has following beneficial effect:
The present invention utilizes a kind of load transfer fixture pulling force being converted to pressure to make diffusion welding (DW) apparatus structure simple, stable, low cost of manufacture, and highly versatile, does not need the large-scale parts retainer rising temperature regulating device and complexity, easy and simple to handle.
The present invention adopts gear driving pair 10 by rotating adjusting handle 12 or trimming hand wheel 11, drive elevating screw 9, pulling force loading system provided by load transfer fixture 17 converts the pressure of part to be welded to, certain pressure is applied between part to be welded, make between piece surface to be welded, to realize diffusion to connect, this connection procedure material area is large, and the dwell time is long, keeps the uniform contact connecting workpiece.In the temperature rise period, pressurization can make local surfaces boss be driven plain in the present invention, is equivalent to and improves surface roughness; The position oxide-film that Plastic Flow occurs simultaneously is able to Mechanical Crushing.When the amount adding intermediate layer is certain, pressurization can also eliminate shrinkage porosite and the shrinkage cavity in isothermal solidification latter stage, makes the gap uniformity of docking workpiece, and performance is consistent everywhere to ensure weld seam.
2. welding cost is low.The present invention only needs to heat the welding region of soldering part, and efficient energy-saving, welding effect is good, and qualification rate is high.The present invention, by the defect at detection tabs place, as cavity, field trash, residual gas etc. within a fitting evaluate the impact of atmosphere butt joint mechanical property, observes diffusion junction joint microscopic structure.Result shows: junction welded rate is comparatively large, maximumly reaches 99.5%, and minimum is 88.89%.(1) weld seam connected is narrower, and without cast sturcture, it is metallurgical, mechanical property is substantially identical with matrix material; (2) weld edge is smoother, favourable to follow-up superplastic forming process; (3) blank is easy to assembly, and welding easily.
3. pressure stability in welding process.By levelling device, regulate suitable pressure, make the motion of liquid metals atom comparatively free, and be easy to form stable atomic arrangement in the potential energy field produced at mother metal surface atom and solidify, make the close contact at interface become quite easy; Significantly can reduce welding pressure, shorten weld interval.Suitable adjustment pressure to broken oxide-film, improve the compactness of joint, avoid the pressure that the thermal expansion because of soldering part and fixture causes and significantly decay.Force value is controlled and precision is high, and pressure precision reaches 0.5%.Under the parameters such as suitable temperature and weld interval, face of weld is without any defect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the organigram of mechanical load Diffusion Welding device of the present invention.
Fig. 2 is the organigram of Fig. 1 load transfer fixture.
In figure: 1. balance weight, 2. amplify lever, 3. rear column, 4. counterweight, 5. pedestal, 6. horizontal adjustment bolt, 7. stablize counterweight, 8. front apron, 9. elevating screw, 10. gear driving pair, 11. trimming hand wheels, 12. adjusting handles, 13. times spherical Connection Blocks, 14. transmission rods, 15. heater fixed axis, 16. heating furnaces, 17. load transfer fixtures, 18. front columns, spherical Connection Block on 19., 20. balanced pointers, 21. balance scales, 22. front fulcrum hooks, 23. balance fulcrums, 24. rear fulcrum hooks, 25. long suspension rods, 26. transmission rod connecting pin bores, 27. upper junction plates, 28. clamp nuts, 29. guide posts, 30. lower platens, 31. top boards, 32. cavity, 33. lower connecting plates.
Detailed description of the invention
Consult Fig. 1.In embodiment described below, mechanical load Diffusion Welding device mainly comprises, loading system, temperature-controlling system and provide the load transfer fixture of welding pressure.The adjustment ring composition that temperature control heating system regulates primarily of heater fixed axis 15, heating furnace 16 and heating furnace displacement, for welded piece surface atoms permeating provides energy.Loading system mainly comprises connecting firmly is amplifying the front column 18 between lever 2 and pedestal 5, rear column 3, the elevating screw 9 that rotated by gear driving pair 10.The Main Function of load transfer fixture is the pressure that pulling force loading system provided converts part to be welded to.Described load transfer fixture is arranged in heating furnace 16, and be connected between upper spherical Connection Block 19 and lower spherical Connection Block 13 by transmission rod 14, gear driving pair 10 is by rotating adjusting handle 12, drive elevating screw 9, pulling force loading system provided by load transfer fixture 17 converts the pressure of part to be welded to.
Loading system is primarily of balance weight 1, amplify lever 2, rear column 3, counterweight 4, pedestal 5, horizontal adjustment bolt 6, stablize counterweight 7, front apron 8, elevating screw 9, gear driving pair 10, trimming hand wheel 11, adjusting handle 12, lower spherical Connection Block 13, transmission rod 14, load transfer fixture 17, front column 18 and upper spherical Connection Block 19 form, wherein, trimming hand wheel 11 connects gear driving pair 10 by transverse plane on pedestal 5, gear driving pair 10 connects elevating screw 9, elevating screw 9 coaxially connects lower spherical Connection Block 13 by adjusting handle 12, spherical Connection Block 13 is connected to the lower end of transmission rod 14, transmission rod 14 is by heating furnace 16, connect load transfer fixture 17 and connect spherical Connection Block 19 mutually, be connected by the universal joint be arranged in loading system device simultaneously and amplify lever 2, be positioned at balance weight 1 outside loading system device and connect pull-up counterweight 4 by amplifying the vertical rod that is connected of lever 2 tail end.Front column 18 and rear column 3 are agent structures of fastening, are supported between pressure system device and pedestal 5.Pedestal 5 provides operating platform, and bottom is provided with the horizontal adjustment bolt 6 regulating complete equipment level, and pedestal inner chamber is provided with stabilizing equipment center of gravity, avoids because excessive load causes the stable counterweight 7 of equipment generation deflection.Pedestal 5 front end front apron 8 indicates the isoparametric maintenance window of unit type, specification, tonnage.Elevating screw 9 is by the acting in conjunction of gear driving pair 10 trimming hand wheel 11 be connected and the adjusting handle 12 be coaxially connected, regulate the load transfer fixture 17 being positioned at heating furnace 16 center to the pressure on part to be welded, rotation adjusting handle 12 or trimming hand wheel 11 can drive elevating screw 9 to rise or decline simultaneously, then by lower spherical Connection Block 13, transmission rod 14, load transfer fixture 17 and upper spherical Connection Block 19 by the Movement transmit of screw mandrel to amplification lever 2, balanced pointers 20 is made to move downward or upward again by leverage, the indicating positions of adjustment pointer 20, balanced pointers is made to be positioned at the balance red line place of balance scale 21.Be connected to lower spherical Connection Block 13 on transmission rod 14 upper and lower and upper spherical Connection Block 19 adopts the spherical syndeton of self-aligning, ensure the axiality of transmission rod 14 and load transfer fixture 17, to provide high accuracy force value.The spherical syndeton of self-aligning forms primarily of ball supporting seat, steel ball, sphere countersink pins and outer shroud, when bearing external load effect, outer shroud drives sphere countersink pins to apply pressure to steel ball and ball supporting seat, by the sphere-contact of steel ball in ball supporting seat and sphere counterbore, carry out self-aligning, thus ensure that higher axiality.For exempting to use a large amount of counterweight to cause equipment insufficient rigidity, balance weight 1 amplifies the force value of counterweight by amplifying lever 2, the moment that lever 2 fulcrum rear portion equipment component produces is amplified in leveling.Counterweight 4 is demarcated according to the coefficient amplifying lever, when after the load calculating applying, combines according to calibrated weight load.Counterweight after combination is placed on weight tray, now the Action of Gravity Field of counterweight is on rear transmission rod, rear transmission rod drives and amplifies lever rear end decline, through amplifying the leverage of lever, amplify lever front end will rise, thus before driving, transmission rod rises, because lower spherical Connection Block is fixed on elevating screw, can produce an axial tension between upper and lower transmission rod, the pulling force that loading system provides by load transfer fixture 17 converts the pressure of part to be welded to.
Heating furnace 16 passes through the vertically fixed axis 15 connected firmly on pedestal 5 on transverse plane and is fixedly connected with, and heating furnace 16 forms heating system, for welded piece surface atoms permeating provides energy by built-in high-frequency induction heating power heater.Compared with the industrial frequency electric resistance silk mode of heating that high-frequency induction heating and traditional diffusion welding machine adopt, there is noncontact heating, firing rate is fast, heated perimeter is concentrated, improve heat penetration, ensure the uniform advantage of welding performance.Simultaneously because high frequency has kelvin effect, be particularly suitable for welded tube.Firing rate is conducive to boosting productivity soon, is suitable for dispersion, single welding.
Pedestal 5 is provided with adjustment process simple, the levelling device of the transmission rod 14 that is connected.Levelling device mainly comprises. elevating screw 9 and the adjusting handle 12 being connected to elevating screw 9 of connected toothed wheel transmission 10, and the lower spherical Connection Block 13 be coaxially connected on elevating screw 9, lower spherical Connection Block 13 to be connected load transfer fixture 17 by transmission rod 14, load transfer fixture 17 connects upper spherical Connection Block 19 by heating furnace upper port, upper spherical Connection Block 19 is connected with horizontal magnification lever 2 perpendicular through front fulcrum hook 22, amplifies the connected balance scale 21 of lever 2 tail end and is connected with long suspension rod 25 with balanced pointers 20 by rear fulcrum hook 24.Rotating adjusting handle 12 drives elevating screw 9 to rise or decline, then lower spherical Connection Block 19, pull bar, load transfer fixture 17 and upper spherical Connection Block 19 is passed through by the Movement transmit of elevating screw 9 to amplification lever 2, moved downward or upward by leverage driven equilibrium pointer 20, until balanced pointers 20 points to the balance red line place of balance scale 21.
Consult Fig. 2.Load transfer fixture mainly comprises the transmission rod 14 that two ends are shaped with connecting pin bores 26, be positioned at upper junction plate 27 in the middle part of transmission rod, lower connecting plate 33, clamp nut 28, guide post 29, lower platen 30, top board 31 and cavity 32, wherein, the guide post 29 that three front and back are parallel to each other is connected by the pilot hole of upper junction plate 27 with lower platen 30, form a coupling assembling, another three guide posts be parallel to each other 29 are connected by the pilot hole of lower connecting plate 33 with top board 31, form another coupling assembling, namely upper after these two assembly interconnections, a cavity 32 is formed between lower platen.Upper and lower pressing plate is between upper and lower connecting plate, and the assembly direction of two groups of guide posts is contrary.Be connected with transmission rod by the load transfer fixture assembling part to be welded, transmission rod is connected with upper spherical Connection Block 19 with lower spherical Connection Block 13 again, forms a complete loading system.The Main Function of load transfer fixture is the pressure converted to by the pulling force of loading system face of weld, its cardinal principle is when loading system applies tensile load by transmission rod to load transfer fixture, upper and lower connecting plate will be driven to move up and down, because guide post and connecting plate use clamp nut to be connected, guide post can be driven to move together, thus drive presser motion, the distance between two pressing plates will reduce, and realize applying pressure to soldering part.
Specific embodiment of the invention mainly comprises following steps:
1. welds prepares.Control face of weld roughness Ra≤0.8 μm, the depth of parallelism≤0.05, check piece surface flawless, trachoma or pore in groups, without the oxide layer caused because of machined.Use (2%-3%HF+ (4%-6%) HNO
3mix acid liquor clean welded surface (2-4min), (15-20min clean and junction to be welded have been fitted tightly by junction use blowing dry doubling to be welded rapidly afterwards part to be put into the ultrasonic washing instrument cleaning that acetone soln is housed.
2. part to be welded is installed.The cavity 32 between lower platen 30 and top board 31 put into by part after face of weld pretreatment is good.
3. apply pressure.After installing load transfer fixture, first suitable counterweight is placed on counterweight seat, then adjusting handle 12 is rotated, moved by the threaded engagement of handwheel and screw mandrel, elevating screw 9 is driven to move downward, screw mandrel drives lower spherical Connection Block, lower spherical Connection Block drives load transfer fixture and transmission rod again, thus drive amplification lever front end to decline, amplify lever rear end to rise, pull-up counterweight seat, and pull-up counterweight 4, until the adjustment pointer 20 on counterweight seat points to the center graduation mark of balance scale 21, complete pressure and apply.
4. heat.By the position of adjustment ring adjustment heating furnace 16 on fixed axis 15, until part to be welded is positioned in the middle of the effective heating area of heating furnace 16, closed heating furnace 16, setting heating-up temperature also starts heating.
5. unload.Part to be welded complete welding and after being cooled to room temperature, open heating furnace 16, unscrew the clamp nut 28 on load transfer fixture 17, take off guide post 29 and upper junction plate 27, lower connection 33, from the cavity 32 top board 31 and lower platen 30, take out part to be welded, complete welding.
Set forth multiple feature and advantage of the present invention in the foregoing specification, comprise the 26S Proteasome Structure and Function details of pulling force-pressure conversion device and loading system.For professional and technical personnel in the field, can realize according to above-mentioned disclosed Diffusion Welding device or use the present invention.It will be apparent for designing multiple amendment to those skilled in the art according to the present invention.Therefore the present invention can not be restricted to specific embodiment disclosed herein, and these multiple changes do not depart from the degree of appended claims spirit and scope, and they belong in the scope of the invention.
Claims (10)
1. a mechanical load Diffusion Welding device, comprise loading system, temperature-controlling system and the load transfer fixture that welding pressure is provided, loading system mainly comprises connecting firmly is amplifying the front column (18) between lever (2) and pedestal (5), rear column (3) and the elevating screw (9) rotated by gear driving pair (10), temperature-controlling system mainly comprise vertically connect firmly pedestal (5) top, the heating furnace (16) connected firmly by fixed axis (15), it is characterized in that: heating furnace (16) is by built-in high-frequency induction heating power heater composition heating system, for welded piece surface atoms permeating provides energy, be arranged on load transfer fixture (17) in heating furnace (16) by transmission rod (14), be connected between spherical Connection Block (19) and lower spherical Connection Block (13), gear driving pair (10) is by rotating adjusting handle (12) or trimming hand wheel (11), drive elevating screw (9), pulling force loading system provided by load transfer fixture (17) converts the pressure of part to be welded to, the pulling force of loading system to be converted to by load transfer fixture and to weld the pressure of face of weld by loading system.
2. mechanical load Diffusion Welding device as claimed in claim 1, it is characterized in that: in loading system, trimming hand wheel (11) connects gear driving pair (10) by the upper transverse plane of pedestal (5), gear driving pair (10) connects elevating screw (9), elevating screw (9) coaxially connects lower spherical Connection Block (13) by adjusting handle (12), spherical Connection Block (13) is connected to the lower end of transmission rod (14), transmission rod (14) is by heating furnace (16), connect load transfer fixture (17) and connect spherical Connection Block (19) mutually, be connected by the universal joint be arranged in loading system device simultaneously and amplify lever (2).
3. mechanical load Diffusion Welding device as claimed in claim 2, is characterized in that: be positioned at balance weight (1) outside loading system device and be connected vertical rod connection pull-up counterweight (4) by amplifying lever (2) tail end.
4. mechanical load Diffusion Welding device as claimed in claim 1, is characterized in that: front column (18) and rear column (3) are the agent structures of fastening, are supported between pressure system device and pedestal (5).
5. mechanical load Diffusion Welding device as claimed in claim 1, it is characterized in that: pedestal (5) provides operating platform, bottom is provided with the horizontal adjustment bolt (6) regulating complete equipment level, pedestal inner chamber is provided with stabilizing equipment center of gravity, avoids excessive load to produce the stable counterweight (7) of deflection.
6. mechanical load Diffusion Welding device as claimed in claim 1, it is characterized in that: elevating screw (9) is by the acting in conjunction of gear driving pair (10) trimming hand wheel (11) be connected and the adjusting handle (12) be coaxially connected, adjustment is positioned at the load transfer fixture (17) at heating furnace (16) center to the pressure on part to be welded, by lower spherical Connection Block (13), transmission rod (14), load transfer fixture (17) and upper spherical Connection Block (19) by the Movement transmit of screw mandrel to amplification lever (2), balanced pointers (20) is driven to move by leverage, balanced pointers is made to be positioned at the balance place of balance scale (21).
7. mechanical load Diffusion Welding device as claimed in claim 1, it is characterized in that: be connected to the lower spherical Connection Block (13) on transmission rod (14) upper and lower and the spherical syndeton of upper spherical Connection Block (19) employing self-aligning, ensure the axiality of transmission rod (14) and load transfer fixture (17).
8. mechanical load Diffusion Welding device as claimed in claim 7, it is characterized in that: the spherical syndeton of self-aligning forms primarily of ball supporting seat, steel ball, sphere countersink pins and outer shroud, when bearing external load effect, outer shroud drives sphere countersink pins to apply pressure to steel ball and ball supporting seat, by the sphere-contact of steel ball in ball supporting seat and sphere counterbore, carry out self-aligning, ensure axiality.
9. mechanical load Diffusion Welding device as claimed in claim 1, it is characterized in that: on pedestal (5), be provided with adjustment process simple, the levelling device of connected transmission rod (14), levelling device mainly comprises the elevating screw (9) of connected toothed wheel transmission 10 and is connected to the adjusting handle (12) of elevating screw (9), and the lower spherical Connection Block (13) be coaxially connected on elevating screw (9), lower spherical Connection Block (13) is by the connected load transfer fixture (17) of transmission rod (14), load transfer fixture 17 connects upper spherical Connection Block 19 by heating furnace upper port, upper spherical Connection Block 19 is connected with horizontal magnification lever 2 perpendicular through front fulcrum hook 22, the balance scale 21 be connected with amplification lever 2 tail end is linked up with 24 by rear fulcrum and is connected with long suspension rod 25 with balanced pointers 20.
10. mechanical load Diffusion Welding device as claimed in claim 1, it is characterized in that: load transfer fixture mainly comprises the transmission rod (14) that two ends are shaped with connecting pin bores (26), be positioned at upper junction plate in the middle part of transmission rod (27), lower connecting plate (33), clamp nut (28), guide post (29), lower platen (30), top board (31) and cavity (32), wherein, the guide post (29) that three front and back are parallel to each other is connected by the pilot hole of upper junction plate (27) with lower platen (30), form a coupling assembling, another three guide posts be parallel to each other (29) are connected by the pilot hole of lower connecting plate (33) with top board (31), form another coupling assembling, namely upper after these two assembly interconnections, a cavity (32) is formed between lower platen.
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| CN204381653U (en) * | 2014-11-23 | 2015-06-10 | 中国人民解放军第五七一九工厂 | With different material Diffusion Welding pressue device |
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| CN1669718A (en) * | 2005-03-23 | 2005-09-21 | 西北工业大学 | Pressurizing device and method for vacuum diffusion welding machine |
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| CN102328153A (en) * | 2011-09-01 | 2012-01-25 | 河南科技大学 | Crimping diffusion welding process and clamp of aluminum or aluminum alloy and heterogeneous metal |
| CN102756205A (en) * | 2012-07-13 | 2012-10-31 | 安徽华东光电技术研究所 | Clamp for diffusion welding and using method thereof |
| CN204381653U (en) * | 2014-11-23 | 2015-06-10 | 中国人民解放军第五七一九工厂 | With different material Diffusion Welding pressue device |
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