CN205363057U - Be used for high -performance steel welded welding set - Google Patents

Abstract

The utility model relates to a technical field is used in the engineering construction, specifically a be used for high -performance steel welded welding set, top oil -cylinder plug and welding set are connected through the wire respectively to the welding control case, the one end at the guide rail is established with top oil -cylinder plug to the welding control case, the displacement base is connected to top oil -cylinder plug's piston rod, be equipped with welding set on the displacement base, welding set's fixed the setting on the displacement base of organism, be equipped with the arm on the organism, the stationary welding machine seat is connected to the arm, welding machine foot stall portion is equipped with a plurality of fixed bolster, every fixed bolster bottom is equipped with the heating piece, every heating piece bottom junction seal head. The utility model discloses can carry out automatic weld under personnel control, push up the steerable welding set's of oil -cylinder plug displacement, welded angle, high accessible arm are adjusted, and application scope is wide. Quantity, the big I according to actual need of soldered connection produce, use. Through automatic weld, can effectively improve welded efficiency and guarantee welding quality.

Description

Welder for high-performance steel welding

[technical field]

This utility model relates to engineering construction device technique field, specifically a kind of welder for high-performance steel welding.

[background technology]

It is known that weld also referred to as welding, connect, it is manufacturing process and the technology of a kind of jointing metal or other thermoplastics such as plastics in the way of heating, high temperature or high pressure.

But prior art generally adopts human weld when welding, but artificial manual welding is inefficient, welding quality is uneven cannot accomplish complete standardization, qualifiedization, not only reduces efficiency of construction, also can produce large effect to being welded into quality.

[utility model content]

The purpose of this utility model is contemplated to solve above-mentioned technological deficiency of the prior art, a kind of novel structure is provided, safe and reliable, the welder for high-performance steel welding that efficiency of construction is high, including welding control chamber, pipe bending cylinder, guide rail, displacement transducer, welder, described welding control chamber connects pipe bending cylinder and welder respectively through wire, described welding control chamber and pipe bending cylinder are located at one end of guide rail, the piston rod of pipe bending cylinder connects displacement base, displacement base is provided with welder, the body of described welder is fixedly installed on displacement base, body is provided with mechanical arm, mechanical arm connects stationary welding machine seat, welding machine seat bottom portion is provided with several fixed supports, it is provided with heat block bottom each fixed support, connecting welding head bottom each heat block.

Described displacement base is provided with displacement transducer, and displacement transducer passes through wire and holding wire connecting welding control chamber.

Described fixed support quantity is 4.

This utility model compared with the existing technology, has an advantage in that this utility model can carry out automatic welding under personnel control, and pipe bending cylinder can control the displacement of welder, and the angle of welding, height can be regulated by mechanical arm, applied widely.The quantity of plumb joint, big I carry out producing, using according to actual needs.By automatic welding, the efficiency of welding can be effectively improved and ensure welding quality.

[accompanying drawing explanation]

Fig. 1 is primary structure schematic diagram of the present utility model；

Fig. 2 is welding engineering Quality Control Procedure figure of the present utility model；

As it can be seen, in figure: 1. welding control chamber 2. pipe bending cylinder 3. displacement transducer 4. displacement base 5. heat block 6. plumb joint 7. fixed support 8. welder 9. body 10. mechanical arm 11. welding machine seat；

Specifying Fig. 1 is Figure of abstract of the present utility model.

[detailed description of the invention]

Below in conjunction with accompanying drawing, the utility model is described in further detail, the structure of this device and principle for the people of this specialty it is quite clear that.Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.

This utility model is a kind of welder for high-performance steel welding, including welding control chamber, pipe bending cylinder, guide rail, displacement transducer, welder.Welding control chamber connects pipe bending cylinder and welder respectively through wire, and simultaneous displacement base is provided with displacement transducer, and displacement transducer passes through wire and holding wire connecting welding control chamber.Welding control chamber and pipe bending cylinder are located at one end of guide rail, and the piston rod of pipe bending cylinder connects displacement base, and displacement base is provided with welder.The body of welder is fixedly installed on displacement base, and body is provided with mechanical arm, and mechanical arm connects stationary welding machine seat, thus the rotation of welding machine seat can be controlled.Welding machine seat bottom portion is provided with several fixed supports, and support bracket fastened quantity can be determined according to welding requirements.Heat block it is provided with, connecting welding head bottom each heat block bottom each fixed support.Characteristic according to welding for steel structure, fixed support quantity is preferably 3.

During use, device startup is controlled by welding control chamber, welding control chamber drives pipe bending cylinder and welder to start, and pipe bending cylinder is according to controlling to promote piston rod to drive displacement base to move to desired location, and shift value transmission is fed back to welding control chamber by displacement transducer.Being provided with circuit arrangement in the body of welder, mechanical arm can control the rotation of welding machine seat, so that plumb joint arrives welding position, completes welding process.

Illustrate with an embodiment being used in high-performance steel:

High-strength steel can reduce steel beam column size and dead load, correspondingly reduce welding job amount and welding material consumption, reduce consumption and the construction workload thereof of the coatings such as various antirust, fire prevention, transport and construction and installation are more prone to, reduce the processing and fabricating of steel construction, transport and construction and installation cost；Simultaneously in space, reduce scantling and can create bigger use clear space；Particularly to reduce the thickness of required steel plate, thus reducing throat depth accordingly, improving weldquality, improving structural fatigue service life.Adopt high-strength steel that rolled steel dosage can be greatly reduced, thus greatly reducing the consumption of iron ore resource；And the consumption reducing welding material also can reduce the consumption of other regenerative resources, reduce because of the resource exploitation destruction to environment simultaneously.

Experiment adopts frame-core tube to add the version of outer support, arranges 4 road endless belt truss.Aerial parts high building adopts steel structure member and steel material situation to collect as follows:

One, Q460GJGB/T19879) technical specification is:

(1) chemical composition

1. the chemical composition (heat analysis) of steel should meet the regulation of following table.

The chemical composition (wt%) of steel

2. the tolerance of finished steel plate chemical composition should meet the regulation of GB/T222.

3. for improving the performance of steel, it is allowed to add other trace element, but need to indicate in quality certificate.Wherein carbon equivalent ce (%) value is calculated by following formula:

CE (%)=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15

CE is calculated with heat analysis result when dispatching from the factory, and demanding party can be calculated by check analysis when reviewing.

(2) condition of delivery

1. normalized condition delivery.

2. deliver goods with shearing condition or flame cutting state in edges of plate.

(3) properties of product

Mechanical property of steel plate and cold-bending property result of the test should meet the regulation of following table.

Mechanical property and cold-bending property

Two, Q460GJ welding procedure and every safeguard measure

1, qualification of welding procedure

According to this engineering Q460GJC factory and on-the-spot welding method, welding position, joint form, welding material used, the material of mother metal and thickness coverage etc. and in conjunction with specification, draft out 18 bond pads technique test plate (panel)s, as follows respectively:

Unit: mm

Preheating can adopt Electric heating or flame heating, controls interlayer temperature and should ensure that continuous sequence, during welding point material difference, and the preheating temperature that should select by the steel of intensity higher carbon equivalent in joint.As this weldering comments property indices after pass the test, and after determining reliable welding condition, and strict with welding procedure, just can carry out batch welding production.

2, welding procedure and safeguard measure

Preparation before 2.1 welding

2.1.1 material

Ensure that qualified steel and welding material are the basic premises obtaining good welding quality.Therefore this retrial that class steel and welding material have been undertaken by specification before factory's blanking, its physicochemical property should meet existing national standards.

Determine that employing selects suitable welding material with reference to code requirement and in conjunction with properties in the quality certificate of producer's offer；It ensures that the deposited metal intensity of welding point is not less than the lower limit of strength of parent, is listed as follows；

Mechanical property standard value contrast table

Welding material is deposited in hothouse according to material, kind, specification classification, and welding wire must not have corrosion, greasy dirt, and solder flux must not be mixed with foreign material.Passed examination can be put in storage, and strict implement welding material preserves, dries, deposits, receives machine account system, and it is responsible to set special messenger.After welding material warehouse-in, outer package should be intact, storehouse planted agent dries, neatly, ventilate, mustn't be placed directly on ground when stacking.Generally should be placed on and overhead respectively be not less than on shelf or the backing plate of 300mm with wall, to protect air smooth.Stock is unsuitable too much, answers advanced person first to use, it is to avoid store overlong time.Solder flux adopts slug type SJ101, and this solder flux arc burning when welding is more stable, and de-slag is easy, and appearance of weld is attractive in appearance, and deposited metal has higher low-temperature impact toughness, coordinates the welding of H08MnMoA/H08MnA and applicable low-alloy steel.Solder flux should bakee by the temperature and time requirement that materials specification specifies before use, and the time is 2 hours, temperature 300 350 DEG C.Can bakee 2 hours at 100 150 DEG C of temperature if porcelain ring makes moist, locate dormant state.The gas CO2 concentration that gas shield welding adopts must more than 99.9%.

2.1.2 the inspection of welding equipment

Check before welding that welding equipment properties and parts should be at normal duty, welding cable should suitably insulate in case any bad electric arc cicatrix or short circuit, loop folder should be in good close contact state to ensure stable electrical conductivity with workpiece, ensure the stability that power supply is powered, it is to avoid welding midway power-off and voltage cross great fluctuation process.Check that gas piping place has distortionless, shrivel etc. and affect supply phenomenon, nozzle place gas power uniformity coefficient whether because of nozzle interior exist splash or foreign body and connect loosely or edge disappearance and cause gas shutoff gas leak phenomenon.

2.2 welding procedures

2.2.1 the preparing of bevel for welding

The bevel for welding of high strength steel adopts mechanical process technique to obtain in principle, as adopted flame cutting method, groove face should without obvious cut, depth of cutting veins is not more than 0.2mm, can carry out tamping with the welding material matched be polishing to smooth when producing local breach, and adopt magnetic powder to detect, Crack prevention, groove face is without dirt, oxide skin etc., and polish metallic luster.

2.2.2 tack welding

Positioning welding is more even more important than formal welding in some sense, must not despise its importance, and adopted welding material and welding procedure, welding personnel requirement should be identical with the requirement of formal weld seam.The welding of tack weld should avoid weld seam initial, terminate and corner's welding, arc crater should fill up, and forbids striking and blow-out on the mother metal beyond weld zone.Tack welding preheating temperature generally need to be higher than formal weld preheating temperature 20～40 DEG C.Face of weld must not have the defects such as crackle, slag inclusion, overlap, when having the defects such as crackle, pore, slag inclusion when weld seam, it is necessary to again weld after removing, for the tack weld of cracking, it is necessary to first ascertain the reason, then removes cracking weld seam again.The Size of welds of tack welding not should be greater than the 2/3 of welding seam design size, and is not more than 6mm, and spacing 300～600mm, length is no less than 40mm.

2.2.3 welding point matching requirements

Groove size assembles tolerance unit mm

Forbidding in play movement to clog discard electrode, iron block etc., when the misalignment of unequal thickness plate material docking is more than 3mm, thicker plate by being not more than 1:2.5 gradient smoothing transition, should wait slab docking unfitness of butt joint not should be greater than 2mm.T connector and angle welding parts root gap are more than 1.5mm, and during less than 5mm, the fillet weld size of angle welding should be increased by root gap.

2.2.4 the requirement of run-on tab, arc-extinguishing plate and backing plate

Additionally correctly arrange striking arc-extinguishing plate to be quite necessary, because owing to striking current voltage is too small in welding process, during blow-out, often heat is excessively concentrated, produce transconversion into heat, this two is easily generated defect, such as crackle, draw on arc-extinguishing plate so the deposited metal of two unstable properties must be placed, ensure weldquality.Docking, corner connection, the run-on tab at main weld two ends of joint T-shaped, cross and arc-extinguishing plate, its intensity not should be greater than strength of parent, but should have by the close weldability of weldering mother metal.Run-on tab, arc-extinguishing plate size should be not less than 80*80mm.After having welded, application flame cutting excision or carbon arc air gouging remove run-on tab and arc-extinguishing plate, and must not injure mother metal, and reconditioning is smooth, forbids to shoot down run-on tab and arc-extinguishing plate with hammering, it is prevented that crack.Steel lining backing plate is installed must be solid and reliable, and should there be corrosion and floating rust phenomenon in surface.

2.2.5 welding surroundings requirement

Weld job district wind speed, when more than 2m/s, should arrange wind-proof shed or take other draught exclusion device；When there are draught or aerator in weld job district in atelier, also should set abat-vent by defined above.The relative humidity in weld job district cannot be greater than 90%.When weldment surface moisture or when having snow and ice cover, heating should be taked to dry dehumidifying measure.When weld job district ambient temperature is lower than 0 DEG C, Member Welding district all directions more than or equal to two times of steel plate thickness and should be not less than the mother metal within the scope of 100mm, be heated to after more than 20 DEG C can welding, and in welding process, be all not lower than this temperature.Weld job district environment is beyond above-mentioned regulation but when must weld, and reply weld job district arranges protection canopy and worked up concrete scheme and measure by construction enterprises, and can welding after reporting supervising engineer to confirm.

2.2.6 preheating and interlayer temperature

More thick steel plate internal stress is more big, plus the requirement proposing steel carbon equivalent (weld crack Sensitivity Index) to Q460 steel, therefore the steel plate weld preheating to this material is an important step, purpose is to reduce the shrinkage stress of weld seam and adjacent mother metal, ensure slower rate of cooling, be conducive to the generation of the reduction of hydrogen diffusion preventing weld dimensions much higher hard, plasticity and crackle.For Q460 steel carbon equivalent generally about 0.40～0.45%, tendency of hardenability is also still not serious, therefore this Q460GJC new material is specified in conjunction with welding for steel structure specification, steel plate is carried out weld preheating, temperature controls between 100～150 degree, and bracket place adopts flame heating, main weld and longer butt weld adopt electrical heating, accomplish that mode of heating be combined with each other, its purpose ensure by weldering component be heated uniform.Before weldering, the minimum preheating temperature of mother metal answers according to the form below to require to perform:

Steel classification	t≤20mm	20<t≤40mm	40<t≤60mm	Remarks
					Q345GJC	Not requirement	≥20℃	≥60℃
Q390GJC	≥20℃	≥60℃	≥80℃
					Q460GJC	≥20℃	≥80℃	≥100℃

The preheating temperature of joint should be not less than the temperature that table specifies, interlayer temperature cannot be greater than 230 DEG C, and interlayer temperature should slightly above preheating temperature, and interlayer temperature controls at about 150 degree.Ensureing continuous sequence when multi-pass welding as far as possible, but have in particular cases, when welding bead is cooled to the situation of room temperature sometimes, must be preheated before welding, if not going do so, being just unfavorable for the mechanical property of weld seam, principle is the same with mother metal preheating.When often welding one weld seam, the welding slag covered on cleaning welding bead in time, then in welding bead, carry out backwash 2～3 times with steel brush, it is ensured that and the cleaning of welding bead, thus reducing the defect that weld seam is all kinds of, such as slag inclusion, lack of fusion etc..The selection of joint preheating temperature, with thicker plate and the other mother metal of intensity high one-level for benchmark, should focus on ensureing the preheating temperature of plank side, the strict interlayer temperature controlling thin plate side.During preheating, the surface flame of welding position or electrical heating are uniformly heated, and heating region is the twice thickness range of thicker plate in soldered head, but cannot be less than 150mm region.

As do not preheated at reverse side, it is also possible to preheat in front, but must remove, during flame heating, the carbon distribution produced in 25mm around weld seam and weld seam in heating process.Generally for thickness of slab 25mm, thermometric should be carried out after 2 minutes after the cessation of the heating, often increase or reduce 12.5mm, just often increase or reduce 1 minute, such as 50mm steel plate, being carry out thermometric after 4 minutes, by that analogy.For the weld seam position that deposition amount or binding force are bigger, for avoiding the occurrence of cold crack, postwelding asbestos can being adopted to be incubated, the every 25mm of temperature retention time thickness of slab is 0.5 hour, but total temperature retention time is no less than 1 hour, reaches after temperature retention time slow cooling to room temperature.After-baking can be carried out if desired under the guidance of solder technology person or engineer, 200～250 DEG C of hydrogen that carry out disappearing can be heated at welded seam area.

2.2.7 welding sequence

The reasonable utilization of so-called welding sequence its object is to control the deflection of steel beam column, often in welding process, blindly welding, tell somebody what one's real intentions are unclear, welder lacks experience, steel beam column very easily produces irregular welding deformation, owing to stress is excessively concentrated, after rectification, even cannot reinstatement state, finally can only scrapping by selected member, wasting manpower and material resources and various resource, affect project progress significantly.

For T connector, banjo fixing butt jointing, corner joint, under conditions permit and workpiece can overturn, should adopt downhand welding mode.General welding, should weld from restrained end to free end, the center at the center of weldment or weld seam weld laterally.Contraction generally laterally is bigger than longitudinal contraction, therefore first weldering laterally welds longitudinal seam again；Double groove weld is welded, should first weld deep groove, then weld shallow groove, it is contemplated that deformation retract amount, reversible deformation measure can be adopted when assembling, allowance for shrinkage can be reserved in advance.Long weld seam gas shield welding avoids from the beginning being soldered to tail, can adopt backstep sequence and wandering sequence, if any double-sided symmetrical weld seam, can adopt many people balanced welding, can be prevented effectively from the excessive deformation bringing component because heat concentrates.

2.2.8 welding condition

Welding condition table

Note: in table, parameter is flat, horizontal position.Vertical position welding current ratio horizontal position welding electric current is little by 10～15%

The welding condition of arc pulling type nail solder

While following above welding condition, also reply Q460GJC notes following problem in welding engineering；It is not recommended that go out to smear silicone oil at welding gun mouth, mainly silicone oil is smeared too much, has, when welding, the danger entering weld seam, and nozzle ensures at about 20mm from workpiece distance, and to easily cause gas shield bad from oversize, makes welding gun mouth easily produce to block from too immediate cause splash.The rationally correct angle adjusting torch swinging, incorrect welding position and easily produce defect, and when conditions permit, select downhand welding as far as possible.During special penetration groove welding, welding gun pitch angle control, between 70～80 °, answers Butt welding gun pivot angle to be controlled, it is ensured that welding wire is directly to solder side during multi-layer multi-pass welding.Noting carrying out striking when starting to weld from former weld seam arc crater place 10～20mm at welding point, again return to former arc crater place and weld, do not do that welding line joint easily produces two kinds of defects, namely joint disconnects and joint lack of fusion.For preventing multiple tracks multilayer welding from producing interlayer and lack of penetration, just must note avoiding weld seam and generation valley, groove place shape.These are all often the as easy as rolling off a log phenomenons ignored in welding engineering.

Three, Q460GJ Welding Testing

Before Welding Testing generally comprises weldering, weldering in, postwelding inspection, need to follow strictly.Before weldering, whether Examined effect file is complete, and whether welding material, raw material meet the requirements, and welding equipment is intact no, and whether component assembling and weldment edge quality reach requirement.Weldering checks welding equipment ruuning situation, the implementation status of welding conditions and technique and multilayer welding slag inclusion, the defect such as lack of penetration self-inspection.Find defect in time, rectify and improve in time.Postwelding checks the Weld quality level that all weld seams should be determined according to design by construction, management, quality testing department, undertaken checking and checking and accepting by country working standard " code for acceptance of construction quality of steel structures " GB50205-2001, to being unsatisfactory for requiring that in-problem weld seam must thoroughly be removed rewelding.

If improper for Q460 this kind of high strength steel welding procedure is be easy to produce delayed crack, and crackle is longer for time delay, disguised strong, very harmful, so under the premise ensureing strict welding procedure, 48 hours postweldings of general postwelding carry out detecting and checking；First entrust independent third party to detect unit and carry out the 100%UT detection of melt-through weld, if internal soundness is defective when needing to reprocess it should be noted that after excluding each 50mm in defect two ends, whether defect processes totally to adopt penetrant inspection method to check, preheat on request before repair welding, general pre-ratio of specific heat former preheating temperature is high about 20 DEG C, and strictly control interlayer temperature, the number of rewelding of same position is no more than twice, as answered notification technique personnel and welding engineer during more than twice, after ascertaining the reason, formulate reworking plan, and can reprocess after supervising engineer approves, reprocess operation more stricter than normal weld, absolutely not can arbitrarily operate.Secondly welding quality person's butt welded seam adopts magnifier to estimate, check that quantity is 100%, magnetic powder inspection is adopted to carry out self-inspection at the position that deposited metal amount and constraint (restraint) degree are bigger, flaw detection position is heat affected area and weld seam, as found there is face crack, need to reprocess again after ascertaining the reason, and this is carried out magnetic powder inspection detection with similar batch of weld seam 100%.

Welding engineering Quality Control Procedure is as shown in Figure 2.

Claims (3)

1. the welder for high-performance steel welding, including welding control chamber (1), pipe bending cylinder (2), guide rail, displacement transducer (3), welder (8), it is characterized in that described welding control chamber (1) connects pipe bending cylinder (2) and welder (8) respectively through wire, described welding control chamber (1) and pipe bending cylinder (2) are located at one end of guide rail, the piston rod of pipe bending cylinder connects displacement base, displacement base is provided with welder (8), the body of described welder is fixedly installed on displacement base (4), body is provided with mechanical arm (10), mechanical arm connects stationary welding machine seat (11), welding machine seat bottom portion is provided with several fixed supports (7), heat block (5) it is provided with bottom each fixed support, connecting welding head (6) bottom each heat block.

2. the welder for high-performance steel welding as claimed in claim 1, it is characterized in that described displacement base (4) is provided with displacement transducer (3), displacement transducer passes through wire and holding wire connecting welding control chamber (1).

3. the welder for high-performance steel welding as claimed in claim 1, it is characterised in that described fixed support quantity is 3.