CN108950172A - A kind of experimental method that machinery welding stress is eliminated - Google Patents
A kind of experimental method that machinery welding stress is eliminated Download PDFInfo
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- CN108950172A CN108950172A CN201810403529.6A CN201810403529A CN108950172A CN 108950172 A CN108950172 A CN 108950172A CN 201810403529 A CN201810403529 A CN 201810403529A CN 108950172 A CN108950172 A CN 108950172A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The present invention relates to a kind of experimental methods that mechanical welding stress is eliminated.Its technical solution is: including high pressure liquid-supplying system, iron sand injection generation system, iron sand jet control system, iron sand recovery system and support system, liquid water in water tank is pressurized after purification system is handled by high-pressure pump, and is delivered to iron sand by pressure-regulating valve and high-voltage tube and is sprayed generation system；The iron sand injection generation system includes iron sand tank, hydraulic motor, iron sand injector, mixing tank, throttle valve and iron sand outlet valve, iron sand and high pressure water form high pressure iron sand two phase flow in mixing tank, into iron sand injector, the spray head alignment pieces on the downside of iron sand injector are sprayed.Beneficial effect is: the method that the present invention is cooperated using high-pressure water jet and iron sand, wherein, high pressure water carries iron sand and sprays simultaneously workpiece surface, and the enormous impact compression carried generates enough plastic deformations in workpiece surface, and the fatigue strength of the stress of workpiece can be made to improve 90%.
Description
Technical field
The present invention relates to a kind of mechanical experiment system, in particular to a kind of experimental method that mechanical welding stress is eliminated.
Background technique
In machinery production, welding as one kind commonly in a manner of heating, high temperature or high pressure jointing metal or its
His thermoplastic material manufacturing process and technology, are widely used in machining.When weldment in the welding process, thermal stress, phase
Varying stress, machining stress etc. are more than yield limit, so that there are the stress for failing to eliminate in weldment after cooling；In this way, welding is cold
But the macro-stress remained in weldment after is known as remaining welding stress, the uneven temperature field of welding process and is drawn by it
The local plastic deformation risen the tissue different with specific volume is the basic reason for generating welding stress and distortion, and welding residual stress
It is the principal element for cracking and deforming again.Therefore reduced before equipment is put into operation welding residual stress be pole it is necessary to
, currently, the method for eliminating welding residual stress has: heat treatment, hammering, vibratory drilling method and preloading method etc..
Wherein, 1, heat treatment null method: post weld heat treatment is a kind of common method of elimination welding residual stress.Engineering
Upper we mainly use annealing, and fiery temperature is higher, soaking time is longer, and the effect for eliminating welding residual stress is better.But
It is that temperature is excessively high, makes workpiece surface oxidation than more serious, tissue may change, and influence the service performance of workpiece, there are disadvantages
End.Creep stress Relaxation Theory eliminates welding residual stress for heat treatment and provides another thinking, and workpiece is in lower temperature
Creep can occur, the residual stress meeting stress of material internal is loose and is released, as long as holding time long, theoretically
Residual stress is completely eliminated.In low temperature elimination welding residual stress, materials microstructure and performance change are little, hardly shadow
The service performance of material is rung, and the oxidation and decarburization of low-temperature treatment material surface are also smaller, this can be in the power of material
It learns performance and organizes to achieve the purpose that reduce material welding residual stress in the case where being basically unchanged.
2, hammer null method: postwelding hammers the area weld seam Ji Jinfeng using the hand hammer with roundlet head, makes the area weld seam Ji Jinfeng
Metal obtain extend deformation, welding residual stress, drops in generated compressive plastic deformation when for compensating or offset welding
It is low.To master good force de frappe when hammering, keep uniformly, appropriateness, avoid because force de frappe it is excessive caused by processing hardening or will weldering
Seam hammer is split.In addition, postwelding will hammer in time, in addition to prime coat should not be using hammering, remaining is soldered each layer or will per one
It is hammered, to avoid graphite expansion temperature when hammering cast iron.
3, vibrate null method: vibration null method is to tie welding using the vibration excitor being made of eccentric wheel and variable speed driver
Pulsating stress caused by resonance occurs for structure to reduce internal stress.Such as the test specimen that section is the built-up welding of the side 30mm × 50mm, warp
After crossing σ max=128N/mm2 and σ min=more Cyclic Stress of 5.6N/mm2, the situation of change of residual stress.Work as varying load
Reach certain numerical value, after multiple CYCLIC LOADING, the residual stress in welding structure is gradually decreased.It is set used in this method
Standby simple, processing cost is low, and the time is shorter, without high tempering to problem of oxidation caused by metal surface, is constructing at present
In be widely used.
4, preload null method: mechanical stretching method (preloading method) can also be used to eliminate or adjust, such as to pressure in residual stress
Force container can use the water pressure test, can also be locally heated to 200 DEG C in weld seam two sides, cause a temperature field, make weld seam
Area is stretched, to reduce and eliminate welding residual stress.The elimination and adjustment of welding residual stress should take reasonable welding
Sequentially, advanced welding procedure suitably reduces the rigidity of weldment when welding, and in the suitable position local heating of weldment, makes to weld
Seam can reduce residual stress in each link of welding than relatively freely shrinking, greatly improve material service life and
Performance has great importance in engineering construction.
Chinese patent literature Publication No. CN103805760A, patent name are " a kind of to eliminate weldering using high-pressure water jet
The method for connecing residual stress ", which is moved in welded joints using the Water projectile that nozzle sprays high pressure, adjusts Water projectile
Axle center dynamic pressure is 220 ~ 700MPa；And nozzle water outlet and 5 ~ 10mm of weld spacing are kept, Water projectile is perpendicular to workpiece surface
It is moved back and forth 4 ~ 8 times along welding track from weld seam, enhancement stress eradicating efficacy.The method that the invention uses is easy to operate, can be with
It quickly eliminates the stress of weld remnants after welding, but the problem is that the time of needs is longer, and needs early period
Multiple steps such as cleaning and vibration.
In addition there is a kind of blasting technology, bombard workpiece surface using pellet and be implanted into residual compressive stress, lifting workpieces fatigue
The cold machining process of intensity, bead are a kind of surface intensified techniques that factory is widely used, and equipment is simple, at low cost
It is honest and clean, it is not limited by workpiece shapes and position, it is easy to operate, but working environment is poor, and strengthening effect is general, and noise is very
Greatly.
Summary of the invention
The purpose of the present invention is to drawbacks described above of the existing technology, provide what a kind of mechanical welding stress was eliminated
Experimental method carries the synchronous injection of iron sand by high pressure water, realizes that the stress of weld seam is quickly eliminated, effect is more preferable, decreases
The operating procedure of early period, while the service life of spray head is improved, and reduce jet noise.
The combined experiments system of a kind of water-jet and iron sand injection that the present invention mentions, technical solution is: including height
Press liquid-supplying system, iron sand injection generation system, iron sand jet control system, iron sand recovery system and support system, the high pressure
Liquid-supplying system includes water tank (1), purification system (2), high-pressure pump (3), pressure-regulating valve (4) and high-voltage tube (8), in water tank (1)
Liquid water by purification system (2) processing after by high-pressure pump (3) be pressurized, and by pressure-regulating valve (4) and high-voltage tube (8) it is defeated
It send to iron sand and sprays generation system；
The iron sand injection generation system includes iron sand tank (5), hydraulic motor (6), iron sand injector (7), mixing tank (17), section
Valve (19) and iron sand outlet valve (23) are flowed, high pressure water enters iron sand tank (5) by throttle valve (19), it adjusts pressure-regulating valve (4),
It when pressure reaches experiment setting value, opens iron sand outlet valve (23), iron sand and high pressure water form high pressure in mixing tank (17)
Iron sand two phase flow, into iron sand injector (7)；
The iron sand jet control system includes hydraulic controller (9), control cabinet (10), hydraulic oil pipe (24), control cabinet (10)
Hydraulic controller (9) are connected by hydraulic oil pipe (24), drive hydraulic motor (6) movement by hydraulic controller (9)；
Iron sand recovery system uses magnetic recycling machine (11), is connected to experimental box (16) by magnetic recycling machine (11), leads in experimental box
It crosses clamper (14) and fixes workpiece (15), spray head (13) alignment pieces (15) on the downside of iron sand injector (7) are sprayed；Bracket
System includes upper backup pad (12), support rod (18) and pedestal (20).
Preferably, above-mentioned iron sand injector (7) includes top connection (7.1), mandrel (7.2), gland (7.3), upper seal
(7.4), upper packing (7.5), spring (7.6), quick coupling (7.7), sleeve body (7.8), oil filler point (7.9), retaining ring
(7.10), lower seal (7.11), the mandrel (7.2) are mounted on sleeve body (7.8) inner cavity, and sleeve body (7.8)
Bottom by quick coupling (7.7) connection spray head (13), the top of mandrel (7.2) is equipped with top connection (7.1), in mandrel
(7.2) gland (7.3), upper seal (7.4), upper packing (7.5), spring (7.6), gear are equipped between sleeve body (7.8)
(7.10), lower seal (7.11) are enclosed, the lower part of gland (7.3) is equipped with upper seal (7.4), the downside of upper seal (7.4)
Equipped with upper packing (7.5), spring (7.6) are equipped on the downside of upper packing (7.5), the outer wall at spring (7.6) is equipped with oil filler point
(7.9), it is fixed on the outside of oil filler point (7.9) equipped with nut.
Preferably, the shape of above-mentioned spray head (13) is pyramidal structure, and inner cavity is equipped with four segment structures, is successively from top to bottom:
First cylindrical cavity (13.1), the second cone-shaped cavity (13.2), third cylindrical cavity (13.3), the 4th cone-shaped cavity (13.4),
Wherein, the internal diameter of the first cylindrical cavity (13.1) is greater than the internal diameter of third cylindrical cavity (13.3), the second cone-shaped cavity (13.2)
Internal diameter be greater than the 4th cone-shaped cavity (13.4) internal diameter.
Preferably, above-mentioned spray head (13) is using spray head made of high hardness wear-resisting material, the system of high hardness wear-resisting material
It is as follows to make formula: 80-100 parts of alumina powder, oxidation yttrium powder 3-8 parts, 1-2 parts of calcium bicarbonate, 1-3 parts of talcum powder, zirconium oxide 1-3
Part, 0.01-0.03 parts of oleic acid, 0.04-0.05 parts of paraffin.
Preferably, the downside of above-mentioned clamper (14) is clamper seat (26), and clamper seat (26) and clamper (14) are logical
Four lead screw (27) connections are crossed, realize the fine tuning of lifting；The side of the clamper seat (26) is equipped with connecting rod (26.2), connection
The outer end of bar (26.2) is equipped with operating handle (26.3), the fine tuning in realization left and right horizontal direction, and the two of the clamper seat (26)
Side is equipped with oblique angle shovel (26.1).
Preferably, above-mentioned clamper (14) be equipped with two extrudings items (14.2), it is described squeeze item (14.2) one end and
Clamper (14) is flexibly connected, and the other end is fixed by buckle (14.4), and extruding item (14.2) is by the two of workpiece (15)
Side is fixed on clamper (14) upper surface.
Preferably, the inner wall of above-mentioned experimental box (16) is equipped with noise reduction layer, and noise reduction layer uses temperature resistant glass fiber cloth, rubber
Layer is formed with stainless steel steel mesh, and when production, stainless steel steel mesh is put into metal degreasing agent degreasing 60-90 minutes, and is further existed
Rapid draing 20 minutes in the environment that temperature is 80 degree, then, temperature resistant glass fiber cloth, rubber layer and stainless steel steel mesh are stitched
System together, forms noise reduction layer.
Preferably, above-mentioned experimental box (16) is connected to water tank (1) by pipeline and circulating pump (25), realizes the circulation benefit of water
With；The side of the pressure-regulating valve (4) passes through return pipe (21) joining water box (1)；Pass through on the upside of the throttle valve (19)
Flow divider (22) is connected to iron sand tank (5).
The experimental method that a kind of mechanical welding stress that the present invention mentions is eliminated, it is characterized in that the following steps are included:
One) workpiece being welded (15) is fixed on clamper (14), clamper (14) is mounted on experimental box (16) interior bottom of chamber
Portion；
Two) control cabinet (10) are opened, operated hydraulic controller (9), make iron sand injector (7) on workpiece (15) to be processed
Side；
Three) start high-pressure pump (3), to treated, and water is pressurized by water purification system (2)；
Four) high pressure water utilizes fluidization and static balance principle into throttle valve (19) and iron sand tank (5) through high pressure line (8)
First make the abrasive material fluidization in iron sand tank (5), then adjusts the throttle valve (19) below iron sand tank (5), change iron sand tank
(5) pressure difference up and down, thus the iron sand dosage that control is added in pipeline；
Five) then adjust pressure-regulating valve (4), when pressure reach experiment setting value when, open iron sand outlet valve (23), iron sand with
High pressure water forms high pressure iron sand two phase flow in mixing tank (17), into iron sand injector (7), after fluid jet nozzle (13) accelerate
Form high speed iron sand jet stream；Circulating pump (25) are opened simultaneously, the water of experimental box (16) is squeezed into water tank (1), realizes the circulation of water
It utilizes；
Six) hydraulic controller (9) are operated, is moved to iron sand injector (7) at workpiece to be processed (15), and set according to experiment
Requirement injection workpiece (15) on weld seam；
Seven) it to the end of testing, closes high-pressure pump (3), closes control (10), take out the workpiece handled；
Eight) magnetic recycling machine (11) are opened, magnetic iron sand is recycled.
The beneficial effects of the present invention are: method of the present invention using high-pressure water jet and iron sand cooperation, wherein high pressure water is taken
Band iron sand simultaneously sprays face of weld, and the enormous impact compression carried generates enough plasticity in weld surface and becomes
Shape makes residual stress preferably be relaxed；Impact phase is carried out with existing independent use water jet or exclusive use abrasive material
Than the two mixes synchronous use, can play the effect for preferably eliminating stress, carries iron sand by high pressure water and carries out
Injection can make the fatigue strength of the commissure of workpiece improve 90%, the internal stress of commissure be eliminated comprehensively, with traditional welding stress
Removing method compare, have effect it is good, it is at low cost, pollution-free, easy to operate, be easy dead angle position is handled；
In addition, the service life of spray head can be increased substantially by using the spray head of high-strength abrasion-proof, mitigate the abrasion of spray head
Amount, furthermore, using the two stage reduction of the first cylindrical cavity, the second cone-shaped cavity, third cylindrical cavity, the 4th cone-shaped cavity composition
Inner cavity, first order pressurized construction is formed by the first cylindrical cavity, the second cone-shaped cavity, realizes the primary pressure of iron sand and high pressure water
Power is promoted；The second level pressurized construction being made up of again third cylindrical cavity, the 4th cone-shaped cavity, can be further improved injection
Pressure, avoids once reaching compression shock powerful caused by eject request, and using the material of high hardness wear-resisting, can be with
The service life of spray head is increased substantially, and is also easy production, is used convenient for large-scale promotion；
Furthermore clamper of the invention can realize the fine tuning of up and down direction, clamper by the cooperation of lead screw and clamper seat
Seat realizes the displacement of the horizontal direction of clamper seat by connecting rod and operating handle, in this manner it is possible to realize to weld seam more preferable
Injection, in addition, the outside of clamper seat equipped with oblique angle shovel, can the iron sand layer to deposition strike off, not only make clamper
The movement of seat is more easier, furthermore, it is possible to which iron sand deposits for a long time simultaneously, causes to be difficult to the problem of recycling, and then improve entire
Experiment effect；
In addition, the inner wall of experimental box is equipped with noise reduction layer, the noise of injection further reduced.
Detailed description of the invention
Attached drawing 1 is structural schematic diagram of the invention；
Attached drawing 2 is the structural schematic diagram of iron sand injector；
Attached drawing 3 is the structural schematic diagram of spray head；
Attached drawing 4 is the top view of clamper and workpiece；
Attached drawing 5 is the side view of clamper and clamper seat and workpiece；
In upper figure: water tank 1, purification system 2, high-pressure pump 3, pressure-regulating valve 4, iron sand tank 5, hydraulic motor 6, iron sand injector 7,
High-voltage tube 8, hydraulic controller 9, control cabinet 10, magnetic recycling machine 11, upper backup pad 12, spray head 13, clamper 14, workpiece 15, reality
It is tryoff 16, mixing tank 17, support rod 18, throttle valve 19, pedestal 20, return pipe 21, flow divider 22, iron sand outlet valve 23, hydraulic
Oil pipe 24, circulating pump (25), clamper seat (26), lead screw (27), support base 28, movable top lid 29；
Top connection (7.1), mandrel (7.2), gland (7.3), Packing spring (7.4), thrust bearing (7.5), block (7.6), to
Mandrel holds (7.7), sleeve body (7.8), oil filler point (7.9), retaining ring (7.10), sealing ring (7.11), quick coupling (7.12)；
First cylindrical cavity (13.1), the second cone-shaped cavity (13.2), third cylindrical cavity (13.3), the 4th cone-shaped cavity (13.4)；
Clamp body (14.1), squeeze item (14.2), pin shaft 14.3, buckle (14.4), oblique angle shovel (26.1), connecting rod (26.2),
Operating handle (26.3).
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
The combined experiments system of a kind of water-jet and iron sand injection that the present invention mentions, technical solution is: including height
Press liquid-supplying system, iron sand injection generation system, iron sand jet control system, iron sand recovery system and support system, the high pressure
Liquid-supplying system includes water tank (1), purification system (2), high-pressure pump (3), pressure-regulating valve (4) and high-voltage tube (8), in water tank (1)
Liquid water by purification system (2) processing after by high-pressure pump (3) be pressurized, and by pressure-regulating valve (4) and high-voltage tube (8) it is defeated
It send to iron sand and sprays generation system；
The iron sand injection generation system includes iron sand tank (5), hydraulic motor (6), iron sand injector (7), mixing tank (17), section
Valve (19) and iron sand outlet valve (23) are flowed, high pressure water enters iron sand tank (5) by throttle valve (19), it adjusts pressure-regulating valve (4),
It when pressure reaches experiment setting value, opens iron sand outlet valve (23), iron sand and high pressure water form high pressure in mixing tank (17)
Iron sand two phase flow, into iron sand injector (7)；
The iron sand jet control system includes hydraulic controller (9), control cabinet (10), hydraulic oil pipe (24), control cabinet (10)
Hydraulic controller (9) are connected by hydraulic oil pipe (24), drive hydraulic motor (6) along support base by hydraulic controller (9)
The track that 28 outsides are equipped with moves up and down, and makes iron sand injector (7) that can be moved into experimental box (16) or remove experimental box (16),
The outer wall of hydraulic motor (6) herein is equipped with the track groove with the track cooperation being equipped on the outside of support base 28；Hydraulic controller (9)
Hydraulic oil pipe (24) between hydraulic motor (6) uses the pipeline of flexible expandable, can follow and move down on hydraulic motor (6)
It is dynamic, and then drive moving up and down for iron sand injector.
Iron sand recovery system uses magnetic recycling machine (11), is connected to experimental box (16), experimental box by magnetic recycling machine (11)
Interior fixed workpiece (15) by clamper (14), spray head (13) alignment pieces (15) on the downside of iron sand injector (7) are sprayed；
Support system includes upper backup pad (12), support rod (18) and pedestal (20), and magnetic recycling machine (11) is using commercially available magnetic separator
It is achievable；It should be noted that the inner wall of experimental box (16) is equipped with noise reduction layer.
Wherein, experimental box (16) is connected to water tank (1) by pipeline and circulating pump (25), realizes recycling for water, presses
The side of force regulating valve (4) passes through return pipe (21) joining water box (1)；The upside of throttle valve (19) is connected by flow divider (22)
To iron sand tank (5).
Referring to attached drawing 2, the iron sand injector (7) that the present invention mentions includes top connection (7.1), mandrel (7.2), gland
(7.3), upper seal (7.4), upper packing (7.5), spring (7.6), quick coupling (7.7), sleeve body (7.8), oil filler point
(7.9), retaining ring (7.10), lower seal (7.11), the mandrel (7.2) are mounted on sleeve body (7.8) inner cavity, and sleeve
The bottom of main body (7.8) is equipped with top connection (7.1) by quick coupling (7.7) connection spray head (13), the top of mandrel (7.2),
Gland (7.3), upper seal (7.4), upper packing (7.5), spring are equipped between mandrel (7.2) and sleeve body (7.8)
(7.6), the lower part of retaining ring (7.10), lower seal (7.11), gland (7.3) is equipped with upper seal (7.4), upper seal
(7.4) downside is equipped with upper packing (7.5), is equipped with spring (7.6) on the downside of upper packing (7.5), sets on the outer wall at spring (7.6)
Have oil filler point (7.9), is fixed on the outside of oil filler point (7.9) equipped with nut.In use, mandrel (7.2) may be implemented up and down
Mobile, when needing to rotate, sleeve body (7.8) can be rotated around mandrel, lubricating oil be injected by oil filler point, in the work of spring
Under, upper seal is flowed into upwardly through upper packing, keeps sealing；Retaining ring (7.10) are passed downwardly through into lower seal
(7.11), sealing is formed, is pressurized into spray head 13 without flowing in this way, high pressure water and iron sand can pass through mandrel (7.2)
Out, moreover, injecting lubricating oil by oil filler point, it can be operated without stopping experimental facilities, avoid the need for hesitation
Suspension problem is tested caused by lubrication.
Referring to attached drawing 3, the shape for the spray head (13) that the present invention mentions is pyramidal structure, and inner cavity is equipped with four segment structures, by upper
It is successively under: the first cylindrical cavity (13.1), the second cone-shaped cavity (13.2), third cylindrical cavity (13.3), the 4th taper
Cavity (13.4), wherein the internal diameter of the first cylindrical cavity (13.1) is greater than the internal diameter of third cylindrical cavity (13.3), the second taper
The internal diameter of cavity (13.2) is greater than the internal diameter of the 4th cone-shaped cavity (13.4)；The present invention is by the first cylindrical cavity, the second conical cavity
Body forms first order pressurized construction, realizes a boost in pressure of iron sand and high pressure water；Pass through third cylindrical cavity, the 4th cone again
The second level pressurized construction of shape cavity composition, can be further improved injection pressure, avoids once reaching produced by eject request
Powerful compression shock, and the inner cavity of spray head (13) use high hardness wear-resisting material, be suitble to water carry iron sand injection, can
To increase substantially the service life of spray head, and the spray head is also easy production, uses convenient for large-scale promotion.
In addition, the production formula for the high hardness wear-resisting material that the present invention mentions is as follows: 80-100 parts of alumina powder, yttrium oxide
3-8 parts of powder, 1-2 parts of calcium bicarbonate, 1-3 parts of talcum powder, 1-3 parts of zirconium oxide, 0.01-0.03 parts of oleic acid, paraffin 0.04-0.05
Part, the inner cavity of formation is both wear-resisting and hardness or very high, and the structure of four cavitys is conveniently produced by mold；In addition, four
The two-step supercharging system of a cavity composition, is pressurized spray head compared to level-one, not only supercharging effect is promoted, but also is reduced to spray head
Impact also reduces the loud noise that only level-one pressurization spray head generates, improves experimental situation.
The manufacture craft of the High Strength Wear-Resistance Material is as follows, by weight:
1) by 80-100 parts of alumina powder, oxidation yttrium powder 3-8 parts, 1-2 parts of calcium bicarbonate, 1-3 parts of talcum powder, 1-3 parts of zirconium oxide
Being milled to granularity is 1 μm, is ground out, mist projection granulating, superfine powder processed；
3) superfine powder of 100 parts by weight is put into nodulizer by a., is added paraffin 0.04-0.05 parts, is uniformly mixed, mistake
Sieve, it is 1--10 μm of powder of granularity that partial size, which is made,；
(a) powder is poured into slurrying and filled by b, starts heating and stirring, observation is uniformly mixed, suction 0.1---
0.01atm, when temperature reaches 80 DEG C, pulp is fitted into nozzle die.
4) dumping: passing through in shuttle kiln and heat adhesive contained by adsorbent removal blank, and 1000--1100 ° of dump temperature
C。
5) firing process, according to following sintering curve carry out: the speed of 50 DEG C/h rises to 300 DEG C from room temperature in kiln, then with
80 DEG C/h is warming up to 1200 DEG C, keeps the temperature 1 hour；Then it after being warming up to 1750 DEG C, heat preservation 2 hours with 90 DEG C/h, is naturally cooling to
300 DEG C, the nozzle cavity of high-strength abrasion-proof is made in kiln discharge.
Referring to attached drawing 4-5, the downside of clamper of the invention (14) is clamper seat (26), clamper seat (26) and clamping
Device (14) is cooperated by four lead screw (27) connections, lead screw (27) and threaded clamper (14), realizes the clamping in experiment
The lifting of device is finely tuned, and improves the accuracy of experiment, weld seam is also made to obtain the elimination of better residual stress；The clamper seat
(26) side is equipped with connecting rod (26.2), and the outer end of connecting rod (26.2) is equipped with operating handle (26.3), and by testing
Threaded hole is set in the outer wall of case, with being threadedly engaged for connecting rod (26.2) outer wall, connecting rod is made to realize left and right horizontal direction
Fine tuning also makes each position of weld seam obtain the injection of spray head, and the two sides of the clamper seat (26) are equipped with oblique angle shovel (26.1),
Oblique angle shovel bottom and experimental box bottom surface parallel contact, in this way, can the iron sand layer to deposition strike off, not only make
The movement of clamper seat is more easier, furthermore, it is possible to which iron sand deposits for a long time simultaneously, causes to be difficult to the problem of recycling.
Clamper of the invention can realize the fine tuning of up and down direction, clamper seat by the cooperation of lead screw and clamper seat
The displacement of the horizontal direction of clamper seat is realized by connecting rod and operating handle, in this manner it is possible to realize more to weld seam 15.1
Good injection is additionally provided with sealing device certainly herein at the threaded hole of the side wall of experimental box, connecting rod is avoided to cause across side wall
Leakage；In addition, the outside of clamper seat is shoveled equipped with oblique angle, the bottom of oblique angle shovel and the bottom surface parallel contact of experimental box, this
Sample, can the iron sand layer to deposition strike off, be not only more easier the movement of clamper seat, furthermore, it is possible to iron sand simultaneously
It deposits for a long time, causes to be difficult to the problem of recycling.
In addition, clamper (14) of the invention is equipped with two flexible extruding items (14.2), the extruding item
(14.2) one end is flexibly connected by pin shaft 14.3 with clamper (14), and the other end is fixed by buckle (14.4), passes through two
Item squeezes the upper surface that the two sides of workpiece (15) are fixed on clamp body (14.1) by item (14.2).
Furthermore the inner wall for the experimental box (16) that the present invention mentions is equipped with noise reduction layer, and is equipped with movable top lid 29 at top, though
Right spray head has greatly reduced the noise of injection by transformation, but the liquid and iron sand that eject is when encountering weld seam,
It rebounds again, and will appear some noises, it at this moment, will be in activity using the experimental box (16) for having noise reduction layer, and in an experiment
Lid fold forms the lesser structure of upper opening, can further decrease jet noise；Noise reduction layer in experimental box uses resistance to height
Warm glass fabric, rubber layer and stainless steel steel mesh form, wherein stainless steel steel mesh is put into degreasing in commercially available metal degreasing agent
60-90 minutes, and be further rapid draing 20 minutes in 80 degree of environment in temperature, then, by temperature resistant glass fiber cloth,
Rubber layer is sewed together with stainless steel steel mesh, forms noise reduction layer.In use, stainless steel steel mesh side and experimental box (16) is interior
Wall combines, and encountering temperature resistant glass fiber cloth and rubber layer after injection liquid rebound realizes noise reduction, and effect is preferable.
In addition, the experimental method that a kind of mechanical welding stress that the present invention mentions is eliminated, comprising the following steps:
One) workpiece being welded (15) is fixed on clamper (14), clamper (14) is mounted on experimental box (16) interior bottom of chamber
Portion；And dig movable top lid, reduce the upper opening of experimental box；
Two) control cabinet (10) are opened, operated hydraulic controller (9), make iron sand injector (7) on workpiece (15) to be processed
Side；Magnetic recycling machine (11) is connected to experimental box (16) inner cavity from the upper opening of experimental box by pipeline；Also, experimental box (16)
Inner cavity is connected to water tank (1) by pipeline and circulating pump (25)；
Three) start high-pressure pump (3), to treated, and water is pressurized by water purification system (2)；Filter screen is equipped in water tank (1)
(1.1), the water being pumped into experimental box circulation first carries out coarse filtration, then carries out fine filtering purification by water purification system (2)；
Four) high pressure water is through high pressure line (8), into throttle valve (19) and iron sand tank (5), by adjusting below iron sand tank (5)
Throttle valve (19) changes the pressure difference of iron sand tank (5) up and down, thus the iron sand dosage that control is added in pipeline；
Five) then adjust pressure-regulating valve (4), when pressure reach experiment setting value when, open iron sand outlet valve (23), iron sand with
High pressure water forms high pressure iron sand two phase flow in mixing tank (17), into iron sand injector (7), after fluid jet nozzle (13) accelerate
Form high speed iron sand jet stream；Circulating pump (25) are opened simultaneously, the water of experimental box (16) is squeezed into water tank (1), realizes the circulation of water
It utilizes；
Six) hydraulic controller (9) are operated, is moved to iron sand injector (7) at workpiece to be processed (15), and set according to experiment
Requirement injection workpiece (15) on weld seam；When needing to finely tune, cooperated by lead screw (27) and threaded clamper (14), it is real
Reality test in lifting；It is rotated by operating handle, drives moving left and right for connecting rod, realize the fine tuning of horizontal direction；
Seven) it to the end of testing, closes high-pressure pump (3), closes control (10), take out the workpiece handled；
Eight) magnetic recycling machine (11) are opened, magnetic iron sand is recycled.
The above, is only part preferred embodiment of the invention, and anyone skilled in the art may benefit
Equivalent technical solution is modified or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (4)
1. a kind of experimental method that machinery welding stress is eliminated, it is characterized in that the following steps are included:
One) workpiece being welded (15) is fixed on clamper (14), clamper (14) is mounted on experimental box (16) interior bottom of chamber
Portion；
Two) control cabinet (10) are opened, operated hydraulic controller (9), make iron sand injector (7) on workpiece (15) to be processed
Side；
Three) start high-pressure pump (3), to treated, and water is pressurized by water purification system (2)；
Four) high pressure water utilizes fluidization and static balance principle into throttle valve (19) and iron sand tank (5) through high pressure line (8)
First make the abrasive material fluidization in iron sand tank (5), then adjusts the throttle valve (19) below iron sand tank (5), change iron sand tank
(5) pressure difference up and down, thus the iron sand dosage that control is added in pipeline；
Five) then adjust pressure-regulating valve (4), when pressure reach experiment setting value when, open iron sand outlet valve (23), iron sand with
High pressure water forms high pressure iron sand two phase flow in mixing tank (17), into iron sand injector (7), after fluid jet nozzle (13) accelerate
Form high speed iron sand jet stream；Circulating pump (25) are opened simultaneously, the water of experimental box (16) is squeezed into water tank (1), realizes the circulation of water
It utilizes；
Six) hydraulic controller (9) are operated, is moved to iron sand injector (7) at workpiece to be processed (15), and set according to experiment
Requirement injection workpiece (15) on weld seam；
Seven) it to the end of testing, closes high-pressure pump (3), closes control (10), take out the workpiece handled；
Eight) magnetic recycling machine (11) are opened, magnetic iron sand is recycled.
2. the experimental method that machinery welding stress according to claim 1 is eliminated, it is characterized in that: the experimental box (16)
Inner wall is equipped with noise reduction layer, and noise reduction layer is formed using temperature resistant glass fiber cloth, rubber layer and stainless steel steel mesh, stainless when production
Steel steel mesh is put into metal degreasing agent degreasing 60-90 minutes, and further rapid draing 20 divides in the environment that temperature is 80 degree
Then temperature resistant glass fiber cloth, rubber layer and stainless steel steel mesh are sewed together by clock, form noise reduction layer；And it is set at top
There are movable top lid (29), movable top lid (29) fold is formed into the lesser structure of upper opening, injection can be further decreased and made an uproar
Sound.
3. the experimental method that machinery welding stress according to claim 1 is eliminated, it is characterized in that: the spray head (13) is outer
Shape is pyramidal structure, and inner cavity is equipped with four segment structures, is successively from top to bottom: the first cylindrical cavity (13.1), the second cone-shaped cavity
(13.2), third cylindrical cavity (13.3), the 4th cone-shaped cavity (13.4), wherein the internal diameter of the first cylindrical cavity (13.1) is big
The internal diameter of internal diameter in third cylindrical cavity (13.3), the second cone-shaped cavity (13.2) is greater than the interior of the 4th cone-shaped cavity (13.4)
Diameter；
For the spray head (13) using spray head made of high hardness wear-resisting material, the production formula of high hardness wear-resisting material is as follows:
80-100 parts of alumina powder, oxidation yttrium powder 3-8 parts, 1-2 parts of calcium bicarbonate, 1-3 parts of talcum powder, 1-3 parts of zirconium oxide, oleic acid
0.01-0.03 parts, 0.04-0.05 parts of paraffin；
The manufacture craft of the high hardness wear-resisting material is as follows, by weight:
By 80-100 parts of alumina powder, yttrium powder 3-8 parts of oxidation, 1-2 parts of calcium bicarbonate, 1-3 parts of talcum powder, 1-3 parts of zirconium oxide mills
It is 1 μm to granularity, grinds out, mist projection granulating, superfine powder processed；
3) superfine powder of 100 parts by weight is put into nodulizer by a., is added paraffin 0.04-0.05 parts, is uniformly mixed, mistake
Sieve, it is 1--10 μm of powder of granularity that partial size, which is made,；
(a) powder is poured into slurrying and filled by b, starts heating and stirring, observation is uniformly mixed, suction 0.1---
0.01atm, when temperature reaches 80 DEG C, pulp is fitted into nozzle die；
4) dumping: passing through in shuttle kiln and heat adhesive contained by adsorbent removal blank, and 1000--1100 °C of dump temperature；
5) firing process, according to following sintering curve carry out: the speed of 50 DEG C/h rises to 300 DEG C from room temperature in kiln, then with
80 DEG C/h is warming up to 1200 DEG C, keeps the temperature 1 hour；Then it after being warming up to 1750 DEG C, heat preservation 2 hours with 90 DEG C/h, is naturally cooling to
300 DEG C, the nozzle cavity of high-strength abrasion-proof is made in kiln discharge.
4. the experimental method that machinery welding stress according to claim 1 is eliminated, it is characterized in that: the iron sand injector
It (7) include top connection (7.1), mandrel (7.2), gland (7.3), upper seal (7.4), upper packing (7.5), spring (7.6), fast
Quick coupling (7.7), sleeve body (7.8), oil filler point (7.9), retaining ring (7.10), lower seal (7.11), the mandrel
(7.2) it is mounted on sleeve body (7.8) inner cavity, and the bottom of sleeve body (7.8) connects spray head by quick coupling (7.7)
(13), the top of mandrel (7.2) is equipped with top connection (7.1), and gland is equipped between mandrel (7.2) and sleeve body (7.8)
(7.3), upper seal (7.4), upper packing (7.5), spring (7.6), retaining ring (7.10), lower seal (7.11), gland (7.3)
Lower part be equipped with upper seal (7.4), the downside of upper seal (7.4) is equipped with upper packing (7.5), sets on the downside of upper packing (7.5)
Have spring (7.6), the outer wall at spring (7.6) is equipped with oil filler point (7.9), fixes on the outside of oil filler point (7.9) equipped with nut.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810403529.6A CN108950172A (en) | 2017-03-15 | 2017-03-15 | A kind of experimental method that machinery welding stress is eliminated |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810403529.6A CN108950172A (en) | 2017-03-15 | 2017-03-15 | A kind of experimental method that machinery welding stress is eliminated |
| CN201710154465.6A CN106755922B (en) | 2017-03-15 | 2017-03-15 | A kind of combined experiments system and method for water-jet and iron sand injection |
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| CN117696686B (en) * | 2024-02-06 | 2024-05-07 | 中国航空制造技术研究院 | T-shaped welding structure deformation correction and weld reinforcement combined machining method |
Citations (3)
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|---|---|---|---|---|
| CN1281832A (en) * | 1999-07-27 | 2001-01-31 | 湖南新华联特种材料有限公司 | Abrasion-resistant corundum ceramics |
| CN104911428A (en) * | 2015-04-13 | 2015-09-16 | 北京工业大学 | Wear resistant molybdenum alloy plug and preparation method thereof |
| CN105506251A (en) * | 2015-12-23 | 2016-04-20 | 中国石油大学(华东) | Nozzle system and method for removing residual stress in material through high-pressure water jet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201405268Y (en) * | 2009-04-30 | 2010-02-17 | 聂百胜 | Mine pre-mixed abrasive water-jet cutting device |
| CN103128668B (en) * | 2013-02-28 | 2015-10-21 | 徐州浩通水射流科技有限公司 | A kind of front mixing abrasive water jet smart-cut machine |
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2017
- 2017-03-15 CN CN201810403529.6A patent/CN108950172A/en not_active Withdrawn
- 2017-03-15 CN CN201710154465.6A patent/CN106755922B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281832A (en) * | 1999-07-27 | 2001-01-31 | 湖南新华联特种材料有限公司 | Abrasion-resistant corundum ceramics |
| CN104911428A (en) * | 2015-04-13 | 2015-09-16 | 北京工业大学 | Wear resistant molybdenum alloy plug and preparation method thereof |
| CN105506251A (en) * | 2015-12-23 | 2016-04-20 | 中国石油大学(华东) | Nozzle system and method for removing residual stress in material through high-pressure water jet |
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| 王瑞红等: ""前混合水射流喷丸强化表面粗糙度预测"", 《实验室研究与探索》 * |
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| CN106755922A (en) | 2017-05-31 |
| CN106755922B (en) | 2018-05-29 |
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