CN105618904A - Narrow-gap submerged-arc welding groove structure of large thick-wall oil cylinder and assembling and welding method - Google Patents
Narrow-gap submerged-arc welding groove structure of large thick-wall oil cylinder and assembling and welding method Download PDFInfo
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- CN105618904A CN105618904A CN201610097854.5A CN201610097854A CN105618904A CN 105618904 A CN105618904 A CN 105618904A CN 201610097854 A CN201610097854 A CN 201610097854A CN 105618904 A CN105618904 A CN 105618904A
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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
The invention discloses a narrow-gap submerged-arc welding groove structure of a large thick-wall oil cylinder. The narrow-gap submerged-arc welding groove structure comprises a cylinder head and a cylinder body, wherein a cylinder head truncated edge is arranged on the cylinder head; a cylinder body truncated edge is arranged on the cylinder body, and comprises a truncated edge second step and a truncated edge first step; the cylinder head truncated edge is placed on the truncated edge first step to form a U-shaped narrow-gap groove; and the radius of the bottom of the narrow-gap groove is R. The invention further discloses an assembling and welding method of the narrow-gap submerged-arc welding groove structure of the large thick-wall oil cylinder. With the adoption of the narrow-gap submerged-arc welding groove structure, the assembling precision can be ensured very easily during cylinder head and the cylinder body welding; a welding joint of the oil cylinder can meet 100% fusion penetration ultrasonic flaw detection requirement vary easily; and deformation of the oil cylinder generated in a welding process can be controlled.
Description
Technical field:
The present invention relates to a kind of submerged-arc welding divided edge structure, the narrow-clearance submerged arc welding divided edge structure of especially a kind of large thick-wall oil cylinder and assembling and welding process��
Background technology:
The current class large thick-wall oil cylinder produced, its basic structure is: being formed by cylinder body and cylinder head assembly welding, cylinder block thickness is at more than 150mm, external diameter is at more than 1500mm, length is at more than 1500mm, and postwelding inboard wall of cylinder block is not processed, and weld seam to meet 100% penetration ultrasonic examination requirement. In former similar structures, bevel for welding form is V-type or U-shaped, root face 4mm, and the methods adopting back root cleaning or postwelding that inwall carries out machining are removed groove and very easily produced the weld seam of weld defect more. Owing to oil cylinder material is more special, carbon equivalent ce >=0.6%, preheating temperature is more than 200 DEG C. At this preheating temperature, it is impossible to realize manual CO2Gas shielded arc welding welds, and Lincoln weld can only be adopted weld, and cylinder head and cylinder body all leave single groove, and outside groove can only be opened in, welds in outside, and oil cylinder weld joint on inner side cannot back chipping, cannot weld.
Summary of the invention:
In order to solve the problems referred to above, the invention provides the narrow-clearance submerged arc welding divided edge structure of a kind of large thick-wall oil cylinder and assembling and welding process.
The technical solution adopted for 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, described cylinder head is provided with cylinder head root face, described cylinder body is provided with cylinder body root face, described cylinder body root face includes root face second step and root face first step, described cylinder head root face is placed on root face first step and constitutes a Narrow sloping-glot, and described Narrow sloping-glot is " U " type, and the bottom radius of described Narrow sloping-glot is R.
Described radius R is 12-20cm.
The assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of a kind of large thick-wall oil cylinder, comprises the steps:
1) lathe is utilized to depict four lines in the inner side of cylinder head, these four lines are vertical with the inner circle of cylinder head, and the arc length between adjacent two lines is all 1/4th of cylinder head inner circle girth, lathe is utilized to depict inspection line and stamp ocean dotting punch at the outer lateral extent bevel end identity distance of cylinder head from 100mm place;
2) utilizing lathe to depict four lines in the inner side of cylinder body, these four lines are vertical with the inner circle of cylinder body, and the arc length between adjacent two lines is all 1/4th of cylinder body inner circle girth;
3) depicting the left/right side assembling and welding process connecting plate of four lines inside cylinder head, depict the right/left side assembling and welding process connecting plate of four lines inside cylinder body, welding procedure hanger outside cylinder bottom, to cylinder body and cylinder head local preheating during welding;
4) cylinder body is placed on positioner after having welded by the technique connecting plate on cylinder body and cylinder head, lifting cylinder head assembles with cylinder body, and utilize the inspection ray examination assembly precision drawn, control circumferencial direction and check linear distance cylinder body end face consistent size, and make the technique connecting plate on cylinder body and cylinder head fit, then by welded together for technique connecting plate;
5) oil cylinder be welded on the narrow gap operating machine of 7m*7m to carry out, join 200T Anti-shifting rolling wheel rack to weld, on request solder flux is dried before weldering, measure the degree of depth of weld pitch cylindrical, it is determined that the speed of welding of per pass weld seam, welding current, weldingvoltage, interlayer temperature;
6) when filling weld seam reaches the half of groove depth, butt welded seam carries out a dehydrogenation, improve heating-up temperature, heating-up temperature exceeds 100��150 DEG C than preheating temperature, temperature carries out the insulation of 3��6 hours after reaching requirement, temperature retention time turns down duration and degree of heating after reaching, start again to weld when temperature is reduced to heat range, after whole groove weldings are full, butt welded seam carries out a dehydrogenation again, heating-up temperature exceeds 100��150 DEG C than preheating temperature, temperature carries out the insulation of 3��6 hours after reaching requirement, temperature retention time reaches rear slow cooling, can adopt when ambient temperature is lower 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, adopt carbon arc gouging gun to exclude or the method for gas cutting removes technique connecting plate, and polish, polish, a-quadrant adopts the method for carbon arc air gouging remove equally, and polishes with belt sander, polish.
Owing to adopting technical scheme as above, the present invention has following superiority:
The narrow-clearance submerged arc welding divided edge structure of a kind of large thick-wall oil cylinder of the present invention and assembling and welding process, this divided edge structure not only ensures assembly precision when cylinder head and cylinder body welding easily, and 100% penetration ultrasonic examination requirement can be met by oil cylinder weld seam easily, additionally it is possible to control the deformation that oil cylinder produces in welding process.
Accompanying drawing illustrates:
The sectional view of Fig. 1 oil cylinder 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 of the present invention and cylinder head assembling;
Fig. 5 is the partial enlarged drawing 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 assembling;
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;
Labelling 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 first step.
Detailed description of the invention:
Can being explained in more detail the present invention by the following examples, the open purpose of the present invention is intended to all changes and improvements in the protection scope of the invention, the invention is not limited in the following examples;
Narrow-clearance submerged arc welding divided edge structure in conjunction with a kind of large thick-wall oil cylinder described in accompanying drawing, including: cylinder head 1 and cylinder body 2, described cylinder head 1 is provided with cylinder head root face 3, described cylinder body 2 is provided with cylinder body root face 5, described cylinder body root face 5 includes root face second step 4 and root face first step 6, described cylinder head root face 3 is placed on root face first step 6 and constitutes a Narrow sloping-glot 7, and described Narrow sloping-glot 7 is in " U " type, and the bottom radius of described Narrow sloping-glot 7 is R.
Described radius R is 12-20cm.
The assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of a kind of large thick-wall oil cylinder, comprises the steps:
1) lathe is utilized to depict four lines in the inner side of cylinder head 1, these four lines are vertical with the inner circle of cylinder head 1, and the arc length between adjacent two lines is all 1/4th of cylinder head 1 inner circle girth, lathe is utilized to depict inspection line and stamp ocean dotting punch at the outer lateral extent bevel end identity distance of cylinder head 1 from 100mm place;
2) utilizing lathe to depict four lines in the inner side of cylinder body 2, these four lines are vertical with the inner circle of cylinder body 2, and the arc length between adjacent two lines is all 1/4th of cylinder body 2 inner circle girth;
3) depicting the left/right side assembling and welding process connecting plate of four lines inside cylinder head 1, depict the right/left side assembling and welding process connecting plate of four lines inside cylinder body 2, welding procedure hanger outside cylinder bottom, to cylinder body 2 and cylinder head 1 local preheating during welding;
4) cylinder body 2 is placed on positioner after having welded by the technique connecting plate on cylinder body 2 and cylinder head 1, lifting cylinder head 1 assembles with cylinder body 2, and utilize the inspection ray examination assembly precision drawn, control circumferencial direction and check that linear distance cylinder body 2 face size is consistent, and make the technique connecting plate on cylinder body 2 and cylinder head 1 fit, then by welded together for technique connecting plate;
5) oil cylinder be welded on the narrow gap operating machine of 7m*7m to carry out, join 200T Anti-shifting rolling wheel rack to weld, on request solder flux is dried before weldering, measure the degree of depth of weld pitch cylindrical, it is determined that the speed of welding of per pass weld seam, welding current, weldingvoltage, interlayer temperature;
6) when filling weld seam reaches the half of groove depth, butt welded seam carries out a dehydrogenation, improve heating-up temperature, heating-up temperature exceeds 120 DEG C than preheating temperature, temperature carries out the insulation of 5 hours after reaching requirement, temperature retention time turns down duration and degree of heating after reaching, start again to weld when temperature is reduced to heat range, after whole groove weldings are full, butt welded seam carries out a dehydrogenation again, heating-up temperature exceeds 120 DEG C than preheating temperature, temperature carries out the insulation of 5 hours after reaching requirement, temperature retention time reaches rear slow cooling, can adopt when ambient temperature is lower 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, adopt carbon arc gouging gun to exclude or the method for gas cutting removes technique connecting plate, and polish, polish, a-quadrant adopts the method for carbon arc air gouging remove equally, and polishes with belt sander, polish.
Carefully not stating part in above content is prior art, therefore does not run business into particular one and state.
Claims (3)
1. the narrow-clearance submerged arc welding divided edge structure of a large thick-wall oil cylinder, including: cylinder head (1) and cylinder body (2), it is characterized in that: described cylinder head (1) is provided with cylinder head root face (3), described cylinder body (2) is provided with cylinder body root face (5), described cylinder body root face (5) includes root face second step (4) and root face first step (6), described cylinder head root face (3) is placed on root face first step (6) upper composition one Narrow sloping-glot (7), described Narrow sloping-glot (7) is " U " type, and the bottom radius of described Narrow sloping-glot (7) is R.
2. the narrow-clearance submerged arc welding divided edge structure of a kind of large thick-wall oil cylinder according to claim 1, it is characterised in that: described radius R is 12-20cm.
3. the assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of the large thick-wall oil cylinder described in a claim 1, it is characterised in that: comprise the steps:
1) lathe is utilized to depict four lines in the inner side of cylinder head (1), these four lines are vertical with the inner circle of cylinder head (1), and the arc length between adjacent two lines is all 1/4th of cylinder head (1) inner circle girth, lathe is utilized to depict inspection line and stamp ocean dotting punch at the outer lateral extent bevel end identity distance of cylinder head (1) from 100mm place;
2) utilizing lathe to depict four lines in the inner side of cylinder body (2), these four lines are vertical with the inner circle of cylinder body (2), and the arc length between adjacent two lines is all 1/4th of cylinder body (2) inner circle girth;
3) the left/right side assembling and welding process connecting plate of four lines is depicted in cylinder head (1) inner side, the right/left side assembling and welding process connecting plate of four lines is depicted in cylinder body (2) inner side, welding procedure hanger outside cylinder bottom, to cylinder body (2) and cylinder head (1) local preheating during welding;
4) cylinder body (2) is placed on positioner after having welded by the technique connecting plate on cylinder body (2) and cylinder head (1), lifting cylinder head (1) and cylinder body (2) assemble, and utilize the inspection ray examination assembly precision drawn, control circumferencial direction and check that linear distance cylinder body (2) face size is consistent, and make the technique connecting plate on cylinder body (2) and cylinder head (1) fit, then by welded together for technique connecting plate;
5) oil cylinder be welded on the narrow gap operating machine of 7m*7m to carry out, join 200T Anti-shifting rolling wheel rack to weld, on request solder flux is dried before weldering, measure the degree of depth of weld pitch cylindrical, it is determined that the speed of welding of per pass weld seam, welding current, weldingvoltage, interlayer temperature;
6) when filling weld seam reaches the half of groove depth, butt welded seam carries out a dehydrogenation, improve heating-up temperature, heating-up temperature exceeds 100��150 DEG C than preheating temperature, temperature carries out the insulation of 3��6 hours after reaching requirement, temperature retention time turns down duration and degree of heating after reaching, start again to weld when temperature is reduced to heat range, after whole groove weldings are full, butt welded seam carries out a dehydrogenation again, heating-up temperature exceeds 100��150 DEG C than preheating temperature, temperature carries out the insulation of 3��6 hours after reaching requirement, temperature retention time reaches rear slow cooling, can adopt when ambient temperature is lower 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, adopt carbon arc gouging gun to exclude or the method for gas cutting removes technique connecting plate, and polish, polish, a-quadrant adopts the method for carbon arc air gouging remove equally, and polishes with belt sander, polish.
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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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN114749775A (en) * | 2022-06-13 | 2022-07-15 | 山西阳煤化工机械（集团）有限公司 | Embedded connecting pipe structure and assembly welding method thereof |
| CN115533259A (en) * | 2022-11-09 | 2022-12-30 | 郑州煤矿机械集团股份有限公司 | Method for restraining lack of narrow gap welding seam of oil cylinder of coal mine hydraulic support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN114749775A (en) * | 2022-06-13 | 2022-07-15 | 山西阳煤化工机械（集团）有限公司 | Embedded connecting pipe structure and assembly welding method thereof |
| CN115533259A (en) * | 2022-11-09 | 2022-12-30 | 郑州煤矿机械集团股份有限公司 | Method for restraining lack of narrow gap welding seam of oil cylinder of coal mine hydraulic support |
| 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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