CN105618904B - A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder - Google Patents
A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder Download PDFInfo
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- CN105618904B CN105618904B CN201610097854.5A CN201610097854A CN105618904B CN 105618904 B CN105618904 B CN 105618904B CN 201610097854 A CN201610097854 A CN 201610097854A CN 105618904 B CN105618904 B CN 105618904B
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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
- B23K9/18—Submerged-arc welding
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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
- B23K9/235—Preliminary treatment
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- Physics & Mathematics (AREA)
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- Arc Welding In General (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A kind of narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder, including：Cylinder head and cylinder body, the cylinder head is equipped with cylinder head root face, the cylinder body is equipped with cylinder body root face, the cylinder body root face includes root face second step and root face first step, the cylinder head root face, which is placed on root face first step, constitutes a Narrow sloping-glot, the Narrow sloping-glot is in U-typed, the bottom radius of the Narrow sloping-glot is R, a kind of the narrow-clearance submerged arc welding divided edge structure and assembling and welding process of large thick-wall oil cylinder, the divided edge structure not only easily ensures assembly precision when cylinder head and cylinder body weld, and easily can oil cylinder weld seam meet 100% penetration ultrasonic examination requirement, it can also the deformation that generates in the welding process of control cylinder.
Description
Technical field：
The present invention relates to a kind of submerged-arc welding divided edge structure, especially a kind of narrow-clearance submerged arc welding groove of large thick-wall oil cylinder
Structure and assembling and welding process.
Background technology：
A kind of large thick-wall oil cylinder produced now, basic structure are：It is welded by cylinder body and cylinder head group, cylinder block
Thickness is not processed in 1500mm or more, length in 1500mm or more, postwelding inboard wall of cylinder block in 150mm or more, outer diameter, and weld seam will expire
Foot 100% penetration ultrasonic examination requirement.In pervious similar structures, welding groove form is V-type or U-shaped, root face
4mm mostly uses the weldering that the method removal groove that back root cleaning or postwelding are machined inner wall easily generates weld defect
Seam.Since oil cylinder material is more special, carbon equivalent ce >=0.6%, preheating temperature is at 200 DEG C or more.Under the preheating temperature, nothing
Method realizes the welding of craft CO2 gas shielded arc weldings, Lincoln weld can only be used to weld, cylinder head and cylinder body open single groove, and slope
Mouth can only be opened in outside, welded on the outside, and oil cylinder weld joint on inner side can not back chipping, can not weld.
Invention content：
To solve the above-mentioned problems, the present invention provides a kind of narrow-clearance submerged arc welding divided edge structures of large thick-wall oil cylinder
Assembling and welding process.
The technical solution adopted by the present invention to solve the technical problems：
A kind of narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder, including：Cylinder head and cylinder body, the cylinder head are equipped with
Cylinder head root face, the cylinder body are equipped with cylinder body root face, and the cylinder body root face includes root face second step and root face first step, institute
It states cylinder head root face and is placed on root face first step and constitute a Narrow sloping-glot, the Narrow sloping-glot is in U-typed, described narrow
The bottom radius of gap groove is R.
The radius R is 12-20cm.
A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder, includes the following steps：
1）Four lines are depicted on the inside of cylinder head using lathe, this four lines are vertical with the inner circle of cylinder head and adjacent
Arc length between two lines is all a quarter of cylinder head inner circle perimeter, is utilized at lateral extent bevel end face 100mm outside cylinder head
Lathe, which depicts, to be checked line and stamps foreign dotting punch；
2）Four lines are depicted on the inside of cylinder body using lathe, this four lines are vertical with the inner circle of cylinder body and adjacent
Arc length between two lines is all a quarter of cylinder body inner circle perimeter；
3）The left/right side assembling and welding process connecting plate that four lines are depicted on the inside of cylinder head, depicts four on the inside of cylinder body
The right/left side assembling and welding process connecting plate of line, the welding procedure lifting lug on the outside of cylinder bottom, to cylinder body and cylinder head local preheating when welding；
4）Cylinder body is placed on positioner after the completion of technique connecting plate welding on cylinder body and cylinder head, lifting cylinder head and cylinder body into
Luggage is matched, and using the inspection ray examination assembly precision drawn, and control circumferencial direction checks that linear distance cylinder body face size is consistent,
And the technique connecting plate on cylinder body and cylinder head is made to be bonded, then technique connecting plate is welded together；
5）Being welded on 7m*7m narrow gap operation machines for oil cylinder carries out, and is welded with 200T Anti-shifting rolling wheel racks, is pressed before weldering
It is required that dried to solder flux, the depth of weld pitch outer circle is measured, determines the speed of welding of per pass weld seam, welding current, welding
Voltage, interlayer temperature；
6）Dehydrogenation is carried out to weld seam when filling weld seam and reaching the half of groove depth, improves heating temperature,
Heating temperature is higher by 100~150 DEG C than preheating temperature, and temperature reaches the heat preservation carried out after requirement 3~6 hours, and soaking time reaches
Duration and degree of heating is turned down after, and when temperature is reduced to heat range to start to weld again, weld seam is carried out again after whole groove weldings are full
Dehydrogenation, heating temperature are higher by 100~150 DEG C than preheating temperature, and temperature reaches the guarantor carried out after requirement 3~6 hours
Temperature, soaking time reach rear slow cooling, can be used when environment temperature is less than 5 DEG C and turn down duration and degree of heating slow cooling；
7）When the temperature slow cooling of cylinder body is to 50~80 DEG C, excluded using carbon arc gouging gun or the method removal technique of gas cutting
Connecting plate, and polish, polish, the method for equally using carbon arc air gouging to cylinder body and cylinder head postwelding plane, mill processing region removes, and
With belt sander polishing, polishing.
Due to using technical solution as described above, the present invention that there is following superiority：
A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder of the present invention, the groove knot
Structure not only easily ensures assembly precision when cylinder head and cylinder body weld, and easily being capable of oil cylinder weld seam satisfaction
100% penetration ultrasonic examination requirement, additionally it is possible to the deformation that control cylinder generates in the welding process.
Description of the drawings：
The sectional view of Fig. 1 oil cylinders of the present invention；
Fig. 2 is the divided edge structure of cylinder head of the present invention；
Fig. 3 is the divided edge structure of cylinder body of the present invention；
Fig. 4 is the divided edge structure after cylinder body and cylinder head assembly of the present invention；
Fig. 5 is the partial enlarged view of Fig. 4；
Fig. 6 is the technique connecting plate schematic diagram on cylinder head；
Fig. 7 is the sectional view of M-M in Fig. 6；
Fig. 8 is the technique connecting plate schematic diagram on cylinder body；
Fig. 9 is the sectional view of N-N in Fig. 8；
Figure 10 is the schematic diagram after cylinder body and cylinder head assembly；
Figure 11 is the sectional view of P-P in Figure 10；
Figure 12 is cylinder body and cylinder head postwelding plane, mill processing region schematic diagram；
It is marked in figure：1, cylinder head；2, cylinder body；3, cylinder head root face；4, root face second step；5, cylinder body root face；6, root face
One step.
Specific implementation mode：
The present invention can be explained in more detail by the following examples, the open purpose of the present invention is intended to the protection present invention
All changes and improvements in range, the invention is not limited in the following examples；
A kind of narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder in conjunction with described in attached drawing, including：Cylinder head 1 and cylinder body
2, the cylinder head 1 is equipped with cylinder head root face 3, and the cylinder body 2 is equipped with cylinder body root face 5, and the cylinder body root face 5 includes root face second
Step 4 and root face first step 6, the cylinder head root face 3, which is placed on root face first step 6, constitutes a Narrow sloping-glot 7, described
Narrow sloping-glot 7 is in U-typed, and the bottom radius of the Narrow sloping-glot 7 is R.
The radius R is 12-20cm.
A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder, includes the following steps：
1）Four lines are depicted in the inside of cylinder head 1 using lathe, this four lines are vertical with the inner circle of cylinder head 1, and phase
Arc length between adjacent two lines is all a quarter of 1 inner circle perimeter of cylinder head, at 1 outer lateral extent bevel end face 100mm of cylinder head
It is depicted using lathe and checks line and stamp foreign dotting punch；
2）Four lines are depicted in the inside of cylinder body 2 using lathe, this four lines are vertical with the inner circle of cylinder body 2, and phase
Arc length between adjacent two lines is all a quarter of 2 inner circle perimeter of cylinder body；
3）The left/right side assembling and welding process connecting plate of four lines is depicted in 1 inside of cylinder head, four are depicted in 2 inside of cylinder body
The right/left side assembling and welding process connecting plate of bar line, the welding procedure lifting lug on the outside of cylinder bottom, when welding, are pre- to cylinder body 2 and 1 part of cylinder head
Heat；
4）Cylinder body 2 is placed on positioner after the completion of technique connecting plate welding on cylinder body 2 and cylinder head 1, lifts by crane cylinder head 1 and cylinder
Body 2 is assembled, and using the inspection ray examination assembly precision drawn, and control circumferencial direction checks 2 end face ruler of linear distance cylinder body
It is very little consistent, and the technique connecting plate on cylinder body 2 and cylinder head 1 is made to be bonded, then technique connecting plate is welded together；
5）Being welded on 7m*7m narrow gap operation machines for oil cylinder carries out, and is welded with 200T Anti-shifting rolling wheel racks, is pressed before weldering
It is required that dried to solder flux, the depth of weld pitch outer circle is measured, determines the speed of welding of per pass weld seam, welding current, welding
Voltage, interlayer temperature；
6）Dehydrogenation is carried out to weld seam when filling weld seam and reaching the half of groove depth, improves heating temperature,
Heating temperature is higher by 120 DEG C than preheating temperature, and temperature reaches the heat preservation carried out after requirement 5 hours, and soaking time turns down after reaching
Duration and degree of heating carries out the hydrogen that once disappears when temperature is reduced to heat range to start to weld again to weld seam again after whole groove weldings are full
Processing, heating temperature are higher by 120 DEG C than preheating temperature, and temperature reaches the heat preservation carried out after requirement 5 hours, after soaking time reaches
Slow cooling can be used when environment temperature is less than 5 DEG C and turn down duration and degree of heating slow cooling；
7）When the temperature slow cooling of cylinder body is to 65 DEG C, is excluded using carbon arc gouging gun or the method for gas cutting removal technique connects
Plate, and polish, polish, cylinder body and cylinder head postwelding plane, mill processing region the A method for equally using carbon arc air gouging are removed, are used in combination
Belt sander polishing, polishing.
It is the prior art not state part in the above content carefully, therefore does not run business into particular one and state.
Claims (2)
1. a kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder, including：Cylinder head（1）And cylinder body（2）,
The cylinder head（1）It is equipped with cylinder head root face（3）, the cylinder body（2）It is equipped with cylinder body root face（5）, the cylinder body root face（5）Including
Root face second step（4）With root face first step（6）, the cylinder head root face（3）It is placed on root face first step（6）It is upper to constitute one
Narrow sloping-glot（7）, the Narrow sloping-glot（7）In U-typed, the Narrow sloping-glot（7）Bottom radius be R；Its feature
It is：Include the following steps：
1）Using lathe in cylinder head（1）Inside depict four lines, this four lines and cylinder head（1）Inner circle it is vertical, and phase
Arc length between adjacent two lines is all cylinder head（1）The a quarter of inner circle perimeter, in cylinder head（1）Outer lateral extent bevel end face
It is depicted using lathe at 100mm and checks line and stamp foreign dotting punch；
2）Using lathe in cylinder body（2）Inside depict four lines, this four lines and cylinder body（2）Inner circle it is vertical, and phase
Arc length between adjacent two lines is all cylinder body（2）The a quarter of inner circle perimeter；
3）In cylinder head（1）Inside depicts the left/right side assembling and welding process connecting plate of four lines, in cylinder body（2）Inside depicts four
The right/left side assembling and welding process connecting plate of bar line, the welding procedure lifting lug on the outside of cylinder bottom, to cylinder body when welding（2）And cylinder head（1）Office
Portion preheats；
4）Cylinder body（2）And cylinder head（1）On the welding of technique connecting plate after the completion of by cylinder body（2）It is placed on positioner, lifts by crane cylinder head（1）
With cylinder body（2）It is assembled, and using the inspection ray examination assembly precision drawn, control circumferencial direction checks linear distance cylinder body
（2）Face size is consistent, and makes cylinder body（2）And cylinder head（1）On technique connecting plate fitting, technique connecting plate is then welded in one
It rises；
5）Being welded on 7m*7m narrow gap operation machines for oil cylinder carries out, and is welded with 200T Anti-shifting rolling wheel racks, before weldering as required
Solder flux is dried, the depth of weld pitch outer circle is measured, determine the speed of welding of per pass weld seam, welding current, weldingvoltage,
Interlayer temperature；
6）Dehydrogenation is carried out to weld seam when filling weld seam and reaching the half of groove depth, improves heating temperature, heating
Temperature is higher by 100~150 DEG C than preheating temperature, and temperature reaches the heat preservation carried out after requirement 3~6 hours, after soaking time reaches
Duration and degree of heating is turned down, when temperature is reduced to heat range to start to weld again, weld seam is carried out again after whole groove weldings are full primary
Dehydrogenation, heating temperature are higher by 100~150 DEG C than preheating temperature, and temperature reaches the heat preservation carried out after requirement 3~6 hours, protects
The warm time reaches rear slow cooling, can be used when environment temperature is less than 5 DEG C and turns down duration and degree of heating slow cooling；
7）When the temperature slow cooling of cylinder body is to 50~80 DEG C, is excluded using carbon arc gouging gun or the method for gas cutting removal technique connects
Plate, and polish, polish, the method for equally using carbon arc air gouging to cylinder body and cylinder head postwelding plane, mill processing region removes, and sand is used in combination
The polishing of band machine, polishing.
2. the assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder according to claim 1, feature
It is：The radius R is 12-20cm.
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| CN201610097854.5A CN105618904B (en) | 2016-02-23 | 2016-02-23 | A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder |
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| CN201610097854.5A CN105618904B (en) | 2016-02-23 | 2016-02-23 | A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder |
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| CN111015104A (en) * | 2019-12-13 | 2020-04-17 | 郑州煤机综机设备有限公司 | Remanufacturing method for oil cylinder seam allowance |
| CN111843262A (en) * | 2020-06-16 | 2020-10-30 | 中煤北京煤矿机械有限责任公司 | High-toughness matching narrow gap welding method for forging alloy steel and quenched and tempered high-strength steel |
| CN112658524A (en) * | 2020-11-18 | 2021-04-16 | 中冶陕压重工设备有限公司 | Design method of full-penetration-welding structure of segmented cylinder body of large hydraulic cylinder |
| CN114505612A (en) * | 2022-03-22 | 2022-05-17 | 中国石油大学(华东) | Hydrogenation reactor narrow-gap groove structure based on residual stress control and welding method |
| CN114749775B (en) * | 2022-06-13 | 2022-10-21 | 山西阳煤化工机械（集团）有限公司 | Embedded connecting pipe structure and assembly welding method thereof |
| CN115533259B (en) * | 2022-11-09 | 2023-08-22 | 郑州煤矿机械集团股份有限公司 | Narrow-gap weld defect suppression method for hydraulic support cylinder of coal mine |
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Patent Citations (5)
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|---|---|---|---|---|
| CN102284772A (en) * | 2011-08-25 | 2011-12-21 | 哈尔滨汽轮机厂有限责任公司 | Argon arc back sealing welding method for housing of low-pressure water supply heater of third-generation nuclear power steam turbine |
| WO2014006998A1 (en) * | 2012-07-05 | 2014-01-09 | 日野自動車株式会社 | Welding method |
| CN103008851A (en) * | 2012-12-14 | 2013-04-03 | 四川精控阀门制造有限公司 | All-welded ball valve body weld narrow-gap welding process and interface structure |
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