CN104759797A - Combined groove for thick workpiece crack repairing and combined groove repairing technology - Google Patents
Combined groove for thick workpiece crack repairing and combined groove repairing technology Download PDFInfo
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- CN104759797A CN104759797A CN201510173596.XA CN201510173596A CN104759797A CN 104759797 A CN104759797 A CN 104759797A CN 201510173596 A CN201510173596 A CN 201510173596A CN 104759797 A CN104759797 A CN 104759797A
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
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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
- B23K9/00—Arc welding or cutting
- B23K9/013—Arc cutting, gouging, scarfing or desurfacing
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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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/022—Welding by making use of electrode vibrations
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Abstract
he invention discloses a combined groove for thick workpiece crack repairing and a combined groove repairing technology. The combined groove can guarantee welding rod operation and slag removal during welding of a deep groove and can reduce welding deformation stress. The combined groove has groove depth H. When 20 mm<=H<40 mm, the combined groove comprises a first V-shaped groove body and a U-shaped groove body sequentially from bottom to top, wherein the center line of the first V-shaped groove body is the same as that of the U-shaped groove body; the depth of the first V-shaped groove body is H/2, and the depth of the U-shaped groove body is also H/2. When H >=40 mm, the combined groove comprises a U-shaped groove body, a first V-shaped groove body and a second V-shaped groove body sequentially from bottom to top, wherein the center line of the U-shaped groove body, the center line of the first V-shaped groove body and the center line of the second V-shaped groove body are the same; the depth of the first V-shaped groove body and the depth of the second V-shaped groove body are both H/3, and the depth of the U-shaped groove body is also H/3. The repairing technology comprises the steps that cracks are detected; cracks are cleared, and the combined groove is arranged; welding repairing is performed; finally, clearing and polishing are performed. By the adoption of the combined groove and the repairing technology, consumption of welding materials can be reduced, and welding deformation is reduced.
Description
Technical field
The present invention relates to the welding procedure of crack forming mechanism, the box-like groove of especially a kind of thick member crack forming mechanism soldering group.
Background technology
Known: the crack forming mechanism construction application more next moon is many at present, as: support, tank body, impeller blade, excavator bucket, drive link and various pipeline etc., the method that distinct device adopts according to its performance is different, conventional method for repairing crack has GTAW, soldering, carbon dioxide gas arc welding and stick electrode arc welding, wherein: 1. stick electrode arc welding applies also the widest maximum one in the construction of metal structure pressure-bearing welding equipment crack forming mechanism, because welding rod is of a great variety, corresponding wlding can be mated according to unlike material, and operation is also more flexible, 2. argon tungsten-arc welding is only applicable to the welding of thin pieces, short weld seam, 3. soldering due to mother metal non-fusible, therefore its weld strength is relatively low, for bearing device reparation limitation larger, and heating surface (area) (HS is large, for thick member and the large weldment reparation of tendency of hardenability very unfavorable, 4. carbon dioxide gas arc welding, because its welding gun constructs, is only applicable to the built-up welding of shallow groove and component surface.Therefore the crack forming mechanism research for the large thick member material of tendency of hardenability is most important.
Crack forming mechanism for the thick weldment with tendency of hardenability is studied, first the main cause producing welding stress and distortion is that weldment is subject to uneven heating and cooling and causes, if material itself have larger tendency of hardenability and material thickness larger time, weld seam when repairing soldering will be subject to larger constraint stress, the degree of expanding with heat and contract with cold of local is larger, larger stress can be produced with postwelding in welding process, cause weldment to ftracture.For the crack forming mechanism of this kind of steel, not only strictly to process from Defect removal, retaining wall on slope, wlding selection and correct welding welding method and measure aspect, the quality that guarantee is repaired.
There are the following means that crackle is repaired in prior art:
1, Chinese patent application " a kind of new type stainless steel. corrosion resistance clad steel plate butt welding seam groove structure ", publication number: CN201120369368 inventor: Huang Xiaopeng; Zhang Shuhua applicant: Luxi Industrial Equipment Co., Ltd.
The invention discloses a kind of new type stainless steel. corrosion resistance clad steel plate butt welding seam groove structure, belong to the welding technology field of stainless compound steel plate thickness≤45mm.The bevel for welding of stainless compound steel plate is designed to one side double V-groove, is provided with root face below one side double V-groove.When stainless compound steel plate thickness is less than 20 millimeters, one side double V-groove angle is 70 degree, and the root face below one side double V-groove is of a size of 3 millimeters; Stainless compound steel plate thickness is greater than 20 millimeters when being less than 45 millimeters, and one side double V-groove angle is 50 ~ 60 degree, and the root face below one side double V-groove is of a size of 3 millimeters.By the change of groove type, decrease the retaining wall on slope amount of nearly a times, improve operating efficiency, have very much realistic meaning and development prospect.
2, Chinese patent: " axial-flow rotary propeller type water turbine runner blade crackle treating method ", publication number: CN200710049214 inventor: Yan Xiangbing, applicant: Dongfeng Motor Factory Co., Ltd., Sichuan
The invention discloses axial-flow rotary propeller type water turbine runner blade crackle treating method, runner without lifting goes out runner envelope, repairs at the scene, strengthens " R " value of the excessive fillet that face of blade outlet edge side is connected with flange at bottom by the method for built-up welding intentionally; Stop hole is bored at the afterbody of crackle, and difform groove is adopted to different crackles, by the process sequence preheating specified, repair welding and insulation, the present invention has the following advantages: site operation, and repairing efficiency is short, avoids numerous and diverse disassemble and assemble work, save cost of transportation, REPAIR WELDING place intensity, stiffness are good, and crack resistance is strong, can meet the job requirement of axial-flow rotary propeller type water turbine runner blade after crack forming mechanism.
Above-mentioned what tell about the repair mode of crackle is all adopt different welding methods to when bevel design processing during welding and crack forming mechanism, introduces separately the bevel design when slab crack forming mechanism and processing.The bevel design limitation of general making welding is less, and can carry out single or double bevel design, the processing of its groove can adopt automatically, mechanization carries out, the difficulty of processing of groove is little.And crack forming mechanism welding is all carry out reparation welding procedure at one side substantially, groove size, the degree of depth do not run through whole weldment, the slot treatment of local is just carried out at certain position of original structure, the difficulty of processing of groove is relatively large, and the size of groove, the degree of depth directly affect distortion and the stress intensity of weldment in welding process, and whether the quality after welding meets the requirements.Crack forming mechanism during normal welding is all out U-shaped and double V-groove substantially, but for thick member reparation, single U-shaped groove is unfavorable for the discharge of scarfing cinder and slag; And single double V-groove, groove face width is very large, although be beneficial to scarfing cinder, adds weld metal loading, and for the reparation welding of local, the loading of weld seam is excessive, the corresponding increase of static stress and distortion of weldment, all unfavorable for REPAIR WELDING.
Summary of the invention
Technical problem to be solved by this invention is to provide welding rod operation and scarfing cinder when one can ensure that deep groove welds, and can reduce again the width of groove face, reduces welding material expenditure thus the thick member crack forming mechanism combined type groove of reduction welding deformation stress.
The technical solution adopted for the present invention to solve the technical problems is: thick member crack forming mechanism combined type groove, has groove depth H, domatic width b and the domatic width b1 of root;
As 20mm≤H < 40mm, described domatic width b is 40mm ~ 50mm, and described root width b1 is 10mm ~ 15mm;
Described thick member crack forming mechanism combined type groove, comprises the first double V-groove and U-shaped groove; Described U-shaped groove is positioned at groove root, and described first double V-groove is positioned at above U-shaped groove; Described first double V-groove is smoothly transitted into U-shaped groove; The described double V-groove degree of depth is
the degree of depth of described U-shaped groove is
As H >=40mm, described domatic width b is 50 ± 2mm, and described root width b1 is 15mm ~ 20mm;
Described thick member crack forming mechanism combined type groove, comprises the U-shaped groove, the first double V-groove and the second double V-groove that are disposed with concentricity line from the bottom to top; The domatic width of the domatic width of the root width b1 of described U-shaped groove, U-shaped groove, the root width of the first double V-groove, the domatic width of the first double V-groove, the root width of the second double V-groove and the second double V-groove increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove and the second double V-groove are by plane transition, and described second double V-groove and U-shaped groove are by plane transition; The degree of depth of described first double V-groove and the second double V-groove is
the degree of depth of described U-shaped groove is
Above-mentioned thick member crack forming mechanism combined type groove, by the root of combination groove is set to U-shaped groove, the swing of welding rod in groove when can ensure REPAIR WELDING; Groove plane opening is set to double V-groove, thus is convenient to scarfing cinder; Combinations thereof formula bevel design can also reduce the consumption of welding material simultaneously.Therefore the design of combinations thereof groove effectively can reduce the consumption of welding material in the process of REPAIR WELDING, reduce heat input when weldment is repaired, reduce welding deformation, the reduction of erection time, save construction cost, the serviceability after weldment reparation can be guaranteed simultaneously.
Present invention also offers a kind of renovation technique adopting thick member crack forming mechanism combined type groove, comprise the following steps:
1) thick member crackle is detected;
2) clear up the crackle in thick member, and dig combined type groove in cracks;
As the reparation degree of depth < 40mm of 20mm≤crackle, the groove depth H of described combined type groove is the reparation degree of depth of crackle; Described domatic width b is 40mm ~ 50mm, and described root width b1 is 10mm ~ 15mm;
Described thick member crack forming mechanism combined type groove, comprises the first double V-groove and U-shaped groove; Described U-shaped groove is positioned at groove root, and described first double V-groove is positioned at above U-shaped groove; Described first double V-groove is smoothly transitted into U-shaped groove; The described double V-groove degree of depth is
the degree of depth of described U-shaped groove is
As the reparation degree of depth >=40mm of crackle, the groove depth H of described combined type groove is the reparation degree of depth of crackle; Described domatic width b is 50 ± 2mm, and described root width b1 is 15mm ~ 20mm;
Described thick member crack forming mechanism combined type groove, comprises the U-shaped groove, the first double V-groove and the second double V-groove that are disposed with concentricity line from the bottom to top; The domatic width of the domatic width of the root width b1 of described U-shaped groove, U-shaped groove, the root width of the first double V-groove, the domatic width of the first double V-groove, the root width of the second double V-groove and the second double V-groove increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove and the second double V-groove are by plane transition, and described second double V-groove and U-shaped groove are by plane transition; The degree of depth of described first double V-groove and the second double V-groove is
the degree of depth of described U-shaped groove is
3) select the welding material matched according to repaired weldment material, the welding at all U-shaped groove positions adopts the welding rod welding of Ф 2.5mm; The welding of described V-shaped groove adopts the welding rod welding of Ф 3.2mm; When the crack length repaired is more than adopting segmentation welding during 100mm;
4) after having welded, cleaning, polishing.
Further, step 2) middle employing carbon arc air gouging cleaning crackle.
Combinations thereof formula groove renovation technique, by in the process of crack forming mechanism, REPAIR WELDING groove is arranged to combine groove, thus in the process that crackle is repaired, reduce the consumption of welding material, reduce heat input when weldment is repaired, reduce welding deformation, reduction of erection time also saves construction cost, can guarantee the serviceability after weldment reparation simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the U-shaped groove of list in the embodiment of the present invention;
When Fig. 2 is 200mm in the embodiment of the present invention≤crack forming mechanism degree of depth < 40mm, the structural representation of combination groove;
When Fig. 3 is the crack forming mechanism degree of depth >=40mm in the embodiment of the present invention, the structural representation of combination groove;
Fig. 4 be in the embodiment of the present invention single U-shaped groove and combination groove during 200mm≤crack forming mechanism degree of depth < 40mm compare schematic diagram;
Fig. 5 be in the embodiment of the present invention single U-shaped groove and the combination groove during crack forming mechanism degree of depth >=40mm compare schematic diagram;
Indicate in figure: 1-first double V-groove, 2-U type groove, 3-second double V-groove.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figures 2 and 3, thick member crack forming mechanism combined type groove has groove depth H, domatic width b and the domatic width b1 of root;
As 20mm≤H < 40mm, described domatic width b is 40mm ~ 50mm, and described root width b1 is 10mm ~ 15mm;
Described thick member crack forming mechanism combined type groove, comprises the first double V-groove 1 and U-shaped groove 2; Described U-shaped groove 2 is positioned at groove root, and described first double V-groove 1 is positioned at above U-shaped groove 2; Described first double V-groove 1 is smoothly transitted into U-shaped groove 2; The described double V-groove degree of depth is
the degree of depth of described U-shaped groove 2 is
As H >=40mm, described domatic width b is 50 ± 2mm, and described root width b1 is 15mm ~ 20mm;
Described thick member crack forming mechanism combined type groove, comprises U-shaped groove 2, first double V-groove 1 and the second double V-groove 3 that are disposed with concentricity line from the bottom to top; The domatic width of the root width of the root width b1 of described U-shaped groove 2, the domatic width of U-shaped groove 2, the first double V-groove 1, the domatic width of the first double V-groove 1, the root width of the second double V-groove 3 and the second double V-groove 3 increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove 1 and the second double V-groove 3 are by plane transition, and described second double V-groove 3 and U-shaped groove 2 are by plane transition; The degree of depth of described first double V-groove 1 and the second double V-groove 3 is
the degree of depth of described U-shaped groove 2 is
When thick member in known described thick member crack forming mechanism refers to the component thickness >=40mm when repairing, or the component of the monolateral degree of depth >=20mm of crack forming mechanism all belongs to thick member.
When the crack forming mechanism degree of depth of thick member is less than 20mm, or during thin pieces crack forming mechanism, single U-shaped groove can meet reparation requirement.But when the crack forming mechanism degree of depth is more than or equal to 20mm, single U-shaped groove is unfavorable for deslagging in the process of the reparation of welding, thus affects welding quality, finally cause repairing position poor-performing.The welding material that single double V-groove needs in the process of welding is more, thus it is more that the heat in groove is inputted, and the many meetings of heat cause the corresponding increase of the static stress and distortion of weldment.The final poor-performing that also can cause reparation position, affects repairing effect.
Therefore, when the crack forming mechanism degree of depth of thick member is more than or equal to 20mm, the bevel design of crack forming mechanism can impact the final performance after crack forming mechanism.
As shown in Figure 2, thick member crack forming mechanism combined type groove of the present invention is greater than 20mm in the crack forming mechanism degree of depth when thick member and is less than 40mm, or when equaling 20mm; The groove depth H of described combined type groove is the reparation degree of depth of crackle.
I.e. 20mm≤H < 40mm, described domatic width b is 40mm ~ 50mm, and described root width b1 is 10mm ~ 15mm;
Described thick member crack forming mechanism combined type groove, comprises the first double V-groove 1 and U-shaped groove 2; Described U-shaped groove 2 is positioned at groove root, and described first double V-groove 1 is positioned at above U-shaped groove 2; Described first double V-groove 1 is smoothly transitted into U-shaped groove 2; The described double V-groove degree of depth is
the degree of depth of described U-shaped groove 2 is
The degree of depth due to repair crack is greater than 20mm and is less than 40mm; Or when equaling 20mm, described domatic width b is set to 40mm ~ 50mm, thus the discharge of the welding slag produced when can ensure that welding rod welds in groove.If domatic width b is less than 40mm, be unfavorable for the discharge of welding slag; Reduce the face width b of U-shaped groove 2 simultaneously, when so weld penetration reaches more than 25mm, the swing of welding rod in weld seam and observe fusion situation and will reduce.When domatic width b is greater than 50mm, opening increases, and therefore the area of whole groove will increase, thus the consumption of welding material can be made to increase, and the heat input in groove is increased, thus causes the stress deformation of repair member.
Be greater than 20mm when the degree of depth due to repair crack in sum and be less than 40mm; Or when equaling 20mm, i.e. 20mm≤H < 40mm, described domatic width b is 40mm ~ 50mm.Simultaneously in order to ensure that welding rod can realize normal swing in groove, ensure the welding of groove root, described root width b1 is 15mm ~ 20mm.
Due to described thick member crack forming mechanism combined type groove, comprise the first double V-groove 1 and U-shaped groove 2; Described U-shaped groove 2 is positioned at groove root, and described first double V-groove 1 is positioned at above U-shaped groove 2; Described first double V-groove 1 is smoothly transitted into U-shaped groove 2; The described double V-groove degree of depth is
the degree of depth of described U-shaped groove 2 is
Described U-shaped groove 2 is positioned at groove root, thus when can ensure REPAIR WELDING, welding rod is in the normal swing of groove root, and described first double V-groove 1 is positioned at above U-shaped groove 2; First double V-groove 1 is set above U-shaped groove 2 and can overcomes the shortcoming that U-shaped groove 2 is unfavorable for deslagging; Thus can ensure that welding slag discharges groove in time, ensure welding quality.
As shown in Figure 3, thick member crack forming mechanism combined type groove of the present invention is when being more than or equal to 40mm when the crack forming mechanism degree of depth of thick member, and the groove depth H of described combined type groove is the reparation degree of depth of crackle.
I.e. H >=40mm, described domatic width b is 50 ± 2mm, and described root width b1 is 15mm ~ 20mm;
Described thick member crack forming mechanism combined type groove, comprises U-shaped groove 2, first double V-groove 1 and the second double V-groove 3 that are disposed with concentricity line from the bottom to top; The domatic width of the root width of the root width b1 of described U-shaped groove 2, the domatic width of U-shaped groove 2, the first double V-groove 1, the domatic width of the first double V-groove 1, the root width of the second double V-groove 3 and the second double V-groove 3 increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove 1 and the second double V-groove 3 are by plane transition, and described second double V-groove 3 and U-shaped groove 2 are by plane transition; The degree of depth of described first double V-groove 1 and the second double V-groove 3 is
the degree of depth of described U-shaped groove 2 is
Because the degree of depth of repair crack is greater than or equal to 40mm, the crack depth of reparation is comparatively dark, if described domatic width b arranges too little, in the process of REPAIR WELDING, the welding slag in groove is not easily discharged, thus directly affects welding quality.Therefore described domatic width b is set to 50 ± 2mm, thus the discharge of the welding slag produced when can ensure that welding rod welds in groove.Opening can be avoided excessive simultaneously, increase the consumption of welding material, increase the heat input in groove.Therefore when the degree of depth of repair crack is greater than or equal to 40mm, i.e. H >=40mm, described domatic width b is set to 50 ± 2mm.Simultaneously in order to ensure that welding rod can realize normal swing in groove, ensure the fusion between groove root welding material and repair member, be more than or equal to 40mm owing to repairing the degree of depth, more deeply, in order to ensure the normal swing of welding rod in groove root, described root width b1 is at least set to 15mm.Simultaneously in order to avoid groove root width arranges excessive, increase the consumption of welding material, increase the heat input in groove.Therefore described root width b1 should be less than 20mm.In sum as H >=40mm, described root width b1 is 15mm ~ 20mm; Welding material expenditure can be reduced in guarantee, while reducing heat input, avoid deslagging difficulty, ensure welding quality, after preventing welding from completing, occur stress deformation.
Due to described thick member crack forming mechanism combined type groove, comprise U-shaped groove 2, first double V-groove 1 and the second double V-groove 3 that are disposed with concentricity line from the bottom to top; The domatic width of the root width of the root width b1 of described U-shaped groove 2, the domatic width of U-shaped groove 2, the first double V-groove 1, the domatic width of the first double V-groove 1, the root width of the second double V-groove 3 and the second double V-groove 3 increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove 1 and the second double V-groove 3 are by plane transition, and described second double V-groove 3 and U-shaped groove 2 are by plane transition; The degree of depth of described first double V-groove 1 and the second double V-groove 3 is
the degree of depth of described U-shaped groove 2 is
Described U-shaped groove 2 is positioned at groove root, thus when can ensure REPAIR WELDING, welding rod, in the normal swing of groove root, ensures the welding quality of groove root.U-shaped groove 2 arranges the first double V-groove 1 and the second double V-groove 3; Because the degree of depth of repairing is more than or equal to 40mm, for the ease of reducing the consumption of welding material while deslagging, be therefore designed to two-stage double V-groove, darker owing to repairing the degree of depth, the welding slag of lower floor is first discharged to upper strata by the first double V-groove 1, finally discharges at the second double V-groove 3.
Embodiment one
Fig. 1 is the structural representation opening separately U-shaped groove; Fig. 2 is out the structural representation combining groove, and as Fig. 4 is greater than 20mm for repairing the degree of depth and is less than 40mm, or when equaling 20mm, the crack forming mechanism of condition of equivalent thickness, length opens the wlding consumption contrast of single U-shaped groove and combined type groove:
When reparation groove depth is 30mm, when reparation length is 250mm, if welding rod peritectic COEFFICIENT K n=0.79, during gravity coefficient of coating Kb=0.32, welding rod consumption g=S × ρ × L × (1+Kb) ÷ 1000Kn (Kg) wherein: S-weld seam area, ρ-density, L-fusion length
When opening U-shaped groove, depth H 1 is that the root width B 1 of the U-shaped groove of weld seam of 30mm must ensure 20mm, and according to the degree of irregularity of crackle, groove face width B is that 40mm, Fig. 1 show that the area of U-shaped groove is 9cm
2, material consumption g=9 × 7.8 × 25 × 1.32 ÷ 790=2.94Kg.
2., when adopting combined type groove, depth H is the combination groove of 30mm, and the domatic width b2 of the U-shaped groove 2 of its root is 20mm, and root width b1 narrows down to 10mm, if groove face adopts same width b=40mm, then weld seam area is 6cm
2, so material consumption g=6.75 × 7.8 × 25 × 1.32 ÷ 790=2.2Kg.
3. two kinds of groove wlding consumption differences are 2.94-2.2=0.74Kg, therefore open combined type groove ratio and open single U-shaped groove and can save welding rod 0.74Kg.As shown in Figure 5, be greater than or equal to 40mm for repairing the degree of depth, the crack forming mechanism of condition of equivalent thickness, length is opened wlding that is U-shaped and combined type groove and is consumed comparison structure schematic diagram simultaneously; As can be seen from Figure 5, arranging separately U-shaped groove relative is A2 part with arranging the material combining the many consumption of groove.
Can prove thus to adopt combined type groove can reduce wlding consumption, also can effectively reduce welding stress simultaneously and reduce welding deformation, thus the generation of Crack prevention.
Thick member crack forming mechanism combined type groove of the present invention in sum, by the root of combination groove is set to U-shaped groove, the swing of welding rod in groove when can ensure REPAIR WELDING; Groove plane opening is set to double V-groove, thus is convenient to scarfing cinder; Described thick member crack forming mechanism combined type groove can also reduce the consumption of welding material simultaneously.Therefore described thick member crack forming mechanism combined type groove can effectively reduce the consumption connecing material in the process of REPAIR WELDING, reduces heat input when weldment is repaired, reduces welding deformation, guarantee the serviceability after weldment reparation.Welding material simultaneously owing to consuming reduces, therefore, it is possible to the reduction of erection time, saves construction cost.
Present invention also offers a kind of renovation technique adopting thick member crack forming mechanism combined type groove, comprise the following steps:
1) thick member crackle is detected;
2) clear up the crackle in thick member, and dig combined type groove in cracks;
As the reparation degree of depth < 40mm of 20mm≤crackle, the groove depth H of described combined type groove is the reparation degree of depth of crackle; Described domatic width b is 40mm ~ 50mm, and described root width b1 is 10mm ~ 15mm;
Described thick member crack forming mechanism combined type groove, comprises the first double V-groove 1 and U-shaped groove 2; Described U-shaped groove 2 is positioned at groove root, and described first double V-groove 1 is positioned at above U-shaped groove 2; Described first double V-groove 1 is smoothly transitted into U-shaped groove 2; The described double V-groove degree of depth is
the degree of depth of described U-shaped groove 2 is
As the reparation degree of depth >=40mm of crackle, the groove depth H of described combined type groove is the reparation degree of depth of crackle; Described domatic width b is 50 ± 2mm, and described root width b1 is 15mm ~ 20mm;
Described thick member crack forming mechanism combined type groove, comprises U-shaped groove 2, first double V-groove 1 and the second double V-groove 3 that are disposed with concentricity line from the bottom to top; The domatic width of the root width of the root width b1 of described U-shaped groove 2, the domatic width of U-shaped groove 2, the first double V-groove 1, the domatic width of the first double V-groove 1, the root width of the second double V-groove 3 and the second double V-groove 3 increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove 1 and the second double V-groove 3 are by plane transition, and described second double V-groove 3 and U-shaped groove 2 are by plane transition; The degree of depth of described first double V-groove 1 and the second double V-groove 3 is
the degree of depth of described U-shaped groove 2 is
3) select the welding material matched according to repaired weldment material, the welding at all U-shaped groove 2 positions adopts the welding rod welding of Ф 2.5mm; The welding of described V-shaped groove adopts the welding rod welding of Ф 3.2mm; When the crack length repaired is more than adopting segmentation welding during 100mm;
4) after having welded, cleaning, polishing.
In step 1) in first find need repair position.In step 2) in cleaning crackle thus determine to repair the degree of depth, and digging corresponding combined type groove according to the reparation degree of depth, thus is that REPAIR WELDING is ready.In step 3) in by welding material, groove is welded, thus realize reparation to cracks.In step 4) in the thick member after having welded is cleared up, is polished.
Combined type groove renovation technique of the present invention completes the reparation to thick member crackle by above-mentioned steps, due in step 2) in have employed thick member crack forming mechanism combined type groove, therefore in the process that crackle is repaired, reduce the consumption of welding material, reduce heat input when weldment is repaired, reduce welding deformation, guarantee the serviceability after weldment reparation.Simultaneously owing to decreasing the consumption of welding material, therefore, it is possible to reduce weld interval, the reduction of erection time, save construction cost.
Concrete in step 2) in can clear up crackle in several ways, such as cut.In order to cost-saving raising cleaning efficiency, guarantee that crackle is removed thoroughly, step 2) middle employing carbon arc air gouging cleaning crackle.
Embodiment two
Combined type bevel design is adopted when processing turbine high-pressure cylinder cap crackle.
1) thick member crackle is detected
The former angle welding that turbine high-pressure cylinder cap two different-diameter cylindrical shells connect there is crackle to occur, steam turbine high-pressure cylinder cup body thickness δ=60 ㎜, two cylindrical shell overall diameters are respectively 600mm and 400mm, high pressure cylinder cap material is ZG20CrMoV, reach 30mm through checking cracks through flaw detection bosom, crack depth reaches the half of cylinder body thickness.
Material due to cylinder body has very large tendency of hardenability, therefore just has very large difficulty to REPAIR WELDING, must consider that the heat input of weldment is little as much as possible, is conducive to reducing welding stress and distortion, and as method is improper, the tendency of the crackle that is delayed is very large.
2) clear up the crackle in thick member, and dig combined type groove in cracks;
In order to ensure the welding quality of crackle root, reduce again the loading of weld metal, we have employed knockdown groove, the bead crack degree of depth is 30mm, remove thoroughly in order to ensure crackle, the degree of depth that we adopt carbon arc air gouging to clear up defect reaches 35 ~ 40mm, the width of the U-shaped groove 2 of root should reach 15mm, be convenient to welding rod swing and scarfing cinder, the degree of depth of U-shaped groove 2 is 1/2 (about 15mm) of weld penetration, groove is then the first double V-groove 1 above, groove depth is 1/2 about 15mm of weld penetration, the face width b of groove is 40mm, carbon arc air gouging will adopt alloy bistrique and the polishing of angle grinding machine totally after Defect removal, whether remove thoroughly by dye penetration inspection defect.
3) select the welding material matched according to repaired weldment material, carry out REPAIR WELDING;
When determining that weld seam is removed thoroughly, choose the welding rod kind needing welding, that weld is ZG20CrMoV, adopt cold welding method, the welding rod selected is the position that A507 welding rod welds U-shaped groove 2, adopt the welding rod of Ф 2.5mm, the excessive heat input caused of welding current can be reduced excessive, be conducive to again the normal arc manipulation of welding rod at root.The welding rod of Ф 3.2mm can be selected when welding the first half the first double V-groove 1.Same weld seam, as adopted the independent U-shaped groove of groove face width consistent (40 ~ 50mm), the loading of weld metal then increases greatly, and as shown in Figure 4, Tu4Zhong A1 district part is the filling part that independent U-shaped groove has more than combined type groove.If will reduce the face width of U-shaped groove, when so weld penetration reaches more than 25, the swing of welding rod in weld seam and observe fusion situation and reduce, the fusion situation arranging separately two edges of U-shaped groove does not have combined type groove good yet.
4) welded and rear repair member have been cleared up, polishing.
Claims (3)
1. thick member crack forming mechanism combined type groove, is characterized in that: have groove depth H, domatic width b and the domatic width b1 of root;
As 20mm≤H < 40mm, described domatic width b is 40mm ~ 50mm, and described root width b1 is 10mm ~ 15mm;
Described thick member crack forming mechanism combined type groove, comprises the first double V-groove (1) and U-shaped groove (2); Described U-shaped groove (2) is positioned at groove root, and described first double V-groove (1) is positioned at U-shaped groove (2) top; Described first double V-groove (1) is smoothly transitted into U-shaped groove (2); The described double V-groove degree of depth is
the degree of depth of described U-shaped groove (2) is
As H >=40mm, described domatic width b is 50 ± 2mm, and described root width b1 is 15mm ~ 20mm;
Described thick member crack forming mechanism combined type groove, comprises the U-shaped groove (2), the first double V-groove (1) and the second double V-groove (3) that are disposed with concentricity line from the bottom to top; The domatic width of the root width of the root width b1 of described U-shaped groove (2), the domatic width of U-shaped groove (2), the first double V-groove (1), the domatic width of the first double V-groove (1), the root width of the second double V-groove (3) and the second double V-groove (3) increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove (1) and the second double V-groove (3) are by plane transition, and described second double V-groove (3) and U-shaped groove (2) are by plane transition; The degree of depth of described first double V-groove (1) and the second double V-groove (3) is
the degree of depth of described U-shaped groove (2) is
2. adopt the renovation technique of thick member crack forming mechanism combined type groove as claimed in claim 1, it is characterized in that comprising the following steps:
1) thick member crackle is detected;
2) clear up the crackle in thick member, and dig combined type groove in cracks;
As the reparation degree of depth < 40mm of 20mm≤crackle, the groove depth H of described combined type groove is the reparation degree of depth of crackle; Described domatic width b is 40mm ~ 50mm, and described root width b1 is 10mm ~ 15mm;
Described thick member crack forming mechanism combined type groove, comprises the first double V-groove (1) and U-shaped groove (2); Described U-shaped groove (2) is positioned at groove root, and described first double V-groove (1) is positioned at U-shaped groove (2) top; Described first double V-groove (1) is smoothly transitted into U-shaped groove (2); The described double V-groove degree of depth is
the degree of depth of described U-shaped groove (2) is
As the reparation degree of depth >=40mm of crackle, the groove depth H of described combined type groove is the reparation degree of depth of crackle; Described domatic width b is 50 ± 2mm, and described root width b1 is 15mm ~ 20mm;
Described thick member crack forming mechanism combined type groove, comprises the U-shaped groove (2), the first double V-groove (1) and the second double V-groove (3) that are disposed with concentricity line from the bottom to top; The domatic width of the root width of the root width b1 of described U-shaped groove (2), the domatic width of U-shaped groove (2), the first double V-groove (1), the domatic width of the first double V-groove (1), the root width of the second double V-groove (3) and the second double V-groove (3) increases 5mm ~ 10mm from the bottom to top successively; Described first double V-groove (1) and the second double V-groove (3) are by plane transition, and described second double V-groove (3) and U-shaped groove (2) are by plane transition; The degree of depth of described first double V-groove (1) and the second double V-groove (3) is
the degree of depth of described U-shaped groove (2) is
3) select the welding material matched according to repaired weldment material, the welding at all U-shaped groove (2) positions adopts the welding rod welding of Ф 2.5mm; The welding of described V-shaped groove adopts the welding rod welding of Ф 3.2mm; When the crack length repaired is more than adopting segmentation welding during 100mm;
4) after having welded, cleaning, polishing.
3. combined type groove renovation technique as claimed in claim 2, is characterized in that: step 2) middle employing carbon arc air gouging cleaning crackle.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270937A (en) * | 2016-09-20 | 2017-01-04 | 上海电气核电设备有限公司 | A kind of overlay cladding repair method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431062A (en) * | 1977-08-12 | 1979-03-07 | Hitachi Ltd | Manufacture of structure superior in stress corrosion cracking resistivity |
| JPS61209769A (en) * | 1985-03-13 | 1986-09-18 | Nippon Kokan Kk <Nkk> | Composite groove in tig welding |
| CN2758002Y (en) * | 2004-09-20 | 2006-02-15 | 四川石油管理局 | Composite welding edge beveling |
| CN101077547A (en) * | 2006-08-25 | 2007-11-28 | 中国核工业第二三建设公司 | Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method |
| CN101164729A (en) * | 2006-10-20 | 2008-04-23 | 上海动力设备有限公司 | Pipe-shell type heat converter pipe plate and hemispherical closing head single-side welding narrow gap welding technology |
| CN101947700A (en) * | 2010-09-09 | 2011-01-19 | 中广核工程有限公司 | Groove for automatic welding of nuclear power station and automatic welding method |
-
2015
- 2015-04-14 CN CN201510173596.XA patent/CN104759797B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431062A (en) * | 1977-08-12 | 1979-03-07 | Hitachi Ltd | Manufacture of structure superior in stress corrosion cracking resistivity |
| JPS61209769A (en) * | 1985-03-13 | 1986-09-18 | Nippon Kokan Kk <Nkk> | Composite groove in tig welding |
| CN2758002Y (en) * | 2004-09-20 | 2006-02-15 | 四川石油管理局 | Composite welding edge beveling |
| CN101077547A (en) * | 2006-08-25 | 2007-11-28 | 中国核工业第二三建设公司 | Large posted sides pipeline narrow gap tungsten electrode noble gas protecting all-position automatic soldering method |
| CN101164729A (en) * | 2006-10-20 | 2008-04-23 | 上海动力设备有限公司 | Pipe-shell type heat converter pipe plate and hemispherical closing head single-side welding narrow gap welding technology |
| CN101947700A (en) * | 2010-09-09 | 2011-01-19 | 中广核工程有限公司 | Groove for automatic welding of nuclear power station and automatic welding method |
Cited By (15)
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|---|---|---|---|---|
| CN106270937A (en) * | 2016-09-20 | 2017-01-04 | 上海电气核电设备有限公司 | A kind of overlay cladding repair method |
| CN108714748A (en) * | 2018-06-04 | 2018-10-30 | 中国电建集团核电工程有限公司 | Nuclear power plant main pipeline forging all positon narrow gap automatic welding groove and welding procedure |
| CN109332927A (en) * | 2018-10-17 | 2019-02-15 | 东方电气集团东方电机有限公司 | A kind of Francis Turbine Blade outlet edge crackle processing method |
| CN112440076A (en) * | 2019-08-29 | 2021-03-05 | 招远市金亭岭矿业有限公司 | Method for repairing end cover of ball mill |
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| CN111215830A (en) * | 2019-12-02 | 2020-06-02 | 抚顺特殊钢股份有限公司 | Method for repairing cracks of high-pressure medium-carbon cast steel oil cylinder body with thickness larger than 200mm |
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| CN112171010A (en) * | 2020-10-09 | 2021-01-05 | 磐安字根电子科技有限公司 | Measure entrance to a cave size and welding equipment |
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