CN105252178A - Concentricity control method for axial welding of multilayer annular plates - Google Patents
Concentricity control method for axial welding of multilayer annular plates Download PDFInfo
- Publication number
- CN105252178A CN105252178A CN201510789646.7A CN201510789646A CN105252178A CN 105252178 A CN105252178 A CN 105252178A CN 201510789646 A CN201510789646 A CN 201510789646A CN 105252178 A CN105252178 A CN 105252178A
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- plate
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- control method
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a concentricity control method for axial welding of multilayer annular plates. The concentricity control method includes the following steps: (1) an assembly datum plate with the shape, position and size meeting the design requirement is manufactured; (2) quadrantal points of the assembly datum plate and the annular plates on all layers are determined, and line scribing is carried out on the outer edges or the inner edges of the assembly datum plate and the annular plates on all layers in the plate thickness direction; (3) the assembly datum plate is leveled; (4) the annular plates on all layers are assembled, wherein the annular plates to be assembled are primarily positioned through pipe spacers, plumb lines are hung on the four quadrantal points, four data are obtained by measuring the absolute value of the size difference between the distance from the plumb lines to the quadrantal points of the annular plates to be assembled and the distance from the plumb lines to the quadrantal points of the datum plate, the difference value between the maximum value and the minimum value of the four data meets the assembly positioning requirement through adjustment, the plumb lines are aligned to the scribed lines, in the plate thickness direction, of the to-be-assembled annular plates and the assembly datum plate, and positioning welding is carried out; and (5) axial structural members welded to the assembly datum plate and the annular plates. By means of the steps, the concentricity of the multilayer axially-welded annular plates is controlled.
Description
Technical field
The present invention relates to the welding method of large-sized structural parts, the concentricity control method of the particularly axial welding of a kind of multilayer ring flat-plate.
Background technology
Out frame is the case member of high-rating generator, and its Main Function is support rotor and fixed stator iron core, and body appearance and size is diameter 3800mm, and axial length is 8200mm, weight 95 tons.The uniform 18 key rods of out frame internal circumference are that be welded on 4 iron core rings and 4 support rings, if out frame is at postwelding concentricity excessive (during > 3mm), key rod cannot be installed for the location of stator core and fixing.Concrete structure is see Fig. 1.
Out frame is made up of at the cylindrical shell of cylindrical with covering the framework of inside, sees Fig. 1.Its manufacturing process is the welding equipment first completing inner framework, then completes the welding equipment of cylindrical shell.Inner frame is a kind of large-sized structural parts typically with multilayer loop plate structure, and the concentricity of out frame entirety is determined by the postwelding concentricity of framework.
The assembly work of out frame completes on large-scale mounting plate, generally, flatness and the horizontal gradient error of large-sized mounting plate are all greater than 3mm, along with structural member longitudinal size is longer, error is also larger, cannot ensure the concentricity requirement of out frame with the part aligning method of routine.Along with the increase of structural member size, the stress deformation caused after welding also increases thereupon, and the distortion inaccuracy of large-sized structural parts is corrected very difficult.
Summary of the invention
Technical problem to be solved by this invention is to provide the concentricity control method that a kind of multilayer ring flat-plate axially welds, and effectively can control the concentricity that multilayer ring flat-plate axially welds, and controls the stress deformation of total part within design error.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the concentricity control method that a kind of multilayer ring flat-plate axially welds, and comprises the following steps:
One, the reference for assembling plate of morpheme size conforms designing requirement is made;
Two, the quadrantal points of reference for assembling plate and each layer ring flat-plate is determined, and in reference for assembling plate and each layer ring flat-plate outer rim or inner edge along thickness of slab direction groove;
Three, leveling reference for assembling plate;
Four, each layer ring flat-plate is assembled;
Distance sink tube is used to carry out Primary Location to ring flat-plate to be assembled, to hang oneself plumb line at four quadrantal points, by measuring the absolute value of plumb line to difference in size between ring flat-plate quadrantal points to be assembled and datum plate quadrantal points, obtain four data, by adjustment, make the difference of the maxima and minima of four data meet assembling and positioning requirement, and plumb line align, and positions weldering at the groove in thickness of slab direction with ring flat-plate to be assembled and reference for assembling plate;
Five, axial arrangement part and reference for assembling plate and ring flat-plate are welded to connect;
The concentricity of the multilayer ring flat-plate controlling axially welding is realized by above step.
Adopt Digit Control Machine Tool at the quadrantal points position groove of reference for assembling plate and each layer ring flat-plate.
Adopt levelling device and level measurement device leveling reference for assembling plate;
In described levelling device, base is provided with determines voussoir, and determine voussoir and be provided with and the movable wedge of determining wedge slides and coordinating, the upper surface of movable wedge is level, one end of movable wedge is connected with screw rod, and screw rod is through being connected with nut with the side plate that base is fixedly connected with.
Described nut is gear nut, in the clamp that what gear nut rotatably can not move axially be arranged on is fixedly connected with side plate;
Gear nut is connected with the gears meshing on the output shaft of planetary reduction gear, and the power shaft of planetary reduction gear is connected with motor by shaft coupling.
In described level measurement device, multiple measuring cylinder is placed on submarginal position, reference for assembling plate upper surface, is provided with liquid, is communicated with between bottom measuring cylinder by communicating pipe in measuring cylinder.
The height of liquid level is measured by micrometric depth gauge.
Measuring cylinder is transparent material, is provided with float in measuring cylinder, and float outer wall is provided with scale grating, and measuring cylinder sidewall is provided with reflective gratings read head.
Axial arrangement part welds in upright position, and every one deck arranges that even number welder symmetry is welded simultaneously, and from the one deck at top, order is down welded.
When completing the welding job of half, check the gradient of total part entirety by the method for step 4;
In the welding process of remainder, according to incline direction, welded first by rightabout welder.
Utilize the contraction distortion of first welding side generation progressively to correct inclination, ensure the concentricity of total part postwelding.
The concentricity control method that multilayer ring flat-plate provided by the invention axially welds, by levelling device and level measurement device, coordinate special welding method, effectively can control the concentricity of multilayer loop plate structure weldment, avoid mounting plate flatness and the not enough impact on structural member of levelness precision.And the welding deformation of integral structure component can be controlled, ensure the positional precision of each ring flat-plate and the concentricity precision of total part.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the cross-section structure sketch of out frame.
Fig. 2 is the structural representation of annular endplate leveling and annular web location in the present invention.
Fig. 3 is the plan structure schematic diagram of annular web location in the present invention.
Fig. 4 is the structural representation of levelling device in the present invention.
Fig. 5 is the structural representation of level measurement device in the present invention.
In figure: annular endplate 1, annular web 2, support ring 3, iron core ring 4, key rod 5, cylindrical shell 6, levelling device 7, base 71, determines voussoir 72, movable wedge 73, screw rod 74, side plate 75, gear nut 76, motor 77, planetary reduction gear 78, clamp 79, plumb line 8, level measurement device 9, scale grating 91, float 92, measuring cylinder 93, communicating pipe 94, reflective gratings read head 95, digital display screen 96, distance sink tube 10.
Detailed description of the invention
As in Fig. 1 ~ 3, the concentricity control method that a kind of multilayer ring flat-plate axially welds, comprises the following steps:
One, the reference for assembling plate of morpheme size conforms designing requirement is made;
Using annular endplate 1 as reference for assembling plate in this example, using the benchmark of locating as total part.Annular endplate 1 is by processing or correcting to have higher flatness.By figure paper conversion annular endplate 1 liang of plane and inside and outside circle.
Two, the inside and outside round quadrantal points of reference for assembling plate and each layer ring flat-plate is determined; Reference for assembling plate and each layer ring flat-plate on the intercardinal thickness of slab direction of inside and outside circle by Digit Control Machine Tool groove.Also manual groove can be adopted.Ring-shaped work pieces marks cross centre line, and guides to cylindrical or the intercardinal thickness of slab direction of inner circle, using the groove on four quadrantal points as positioning datum point.Method depends on the concentricity requirement of structural member, and concentricity requirement is higher, then use the method for the Digit Control Machine Tool groove that line precision is higher.
Three, leveling reference for assembling plate;
In preferred scheme, as shown in Fig. 2,4,5, adopt levelling device 7 and level measurement device 9 leveling reference for assembling plate;
In preferred scheme, in described levelling device 7, base 71 is provided with determines voussoir 72, determine voussoir 72 to be provided with and the movable wedge 73 of determining voussoir 72 and being slidably matched, the upper surface of movable wedge 73 is level, one end of movable wedge 73 is connected with screw rod 74, and screw rod 74 is through being connected with nut with the side plate 75 that base 71 is fixedly connected with.By rotating nut, make screw rod 74 displacement, thus drive movable wedge 73 displacement, regulated the height of the upper surface of movable wedge 73 by movable wedge 73 and the lozenges determined between voussoir 72.When leveling, along the circumference of annular endplate 1, uniform multiple levelling device 7 in the bottom of annular endplate 1, realizes the leveling of annular endplate 1 by the height of the upper surface regulating movable wedge 73 in levelling device 7.
Further in preferred scheme, described nut is gear nut 76, in the clamp 79 that what gear nut 76 rotatably can not move axially be arranged on is fixedly connected with side plate 75;
Gear nut 76 is connected with the gears meshing on the output shaft of planetary reduction gear 78, and the power shaft of planetary reduction gear 78 is connected with motor 77 by shaft coupling.Structure thus, by controlling the rotation of motor 77, realizes automatic leveling.
Preferred scheme is as in Fig. 2,5, and in described level measurement device 9, multiple measuring cylinder 93 is placed on submarginal position, reference for assembling plate upper surface, is provided with liquid in measuring cylinder 93, is communicated with between bottom measuring cylinder 93 by communicating pipe 94.Measuring cylinder 93 is preferably distributed in as shown in Figure 3 near the marginal position of quadrantal points A, B, C and D, in leveling process, by measuring the height detection level of liquid level.
In optional scheme, measured the height of liquid level by micrometric depth gauge.
Another optional scheme is as in Fig. 5, and measuring cylinder 93 is transparent material, is provided with float 92 in measuring cylinder 93, and float 92 outer wall is provided with scale grating 91, and measuring cylinder 93 sidewall is provided with reflective gratings read head 95.First measuring cylinder 93 is picked up, liquid in measuring cylinder 93 is all discharged, now float 92 is in zero-bit, start and have reflective gratings read head 95, put down measuring cylinder 93 gradually, liquid is from entering into communicating pipe 94 in measuring cylinder 93, float 92 floats, the corresponding floating of scale grating 91, reflective gratings read head 95 reads shift value, and shows on digital display screen 96.Also numerical value directly can be sent to control device, such as PLC, automatically control aforesaid self-leveling levelling device 7 by PLC and carry out leveling, thus improve working (machining) efficiency.
Four, each layer ring flat-plate is assembled;
Use distance sink tube 10 to ring flat-plate to be assembled, comprise annular web 2, support ring 3 and iron core ring 4 carry out Primary Location, to hang oneself plumb line 8 at four quadrantal points, plumb line adopts 0.3mm piano wire, ceiling hammer weight is greater than 5Kg, by measuring the absolute value of plumb line to difference in size e between ring flat-plate quadrantal points to be assembled and datum plate quadrantal points, obtain four data, pass through accurate adjustment, the difference of the maxima and minima of four data is made to meet assembling and positioning requirement, and plumb line 8 aligns at the groove in thickness of slab direction with ring flat-plate to be assembled and reference for assembling plate, see Fig. 2, shown in 3, position weldering,
Repeat above step, the ring flat-plate that other are to be assembled is installed, comprise annular web 2, support ring 3 and iron core ring 4.
Five, axial arrangement part and reference for assembling plate and ring flat-plate are welded to connect; The axial arrangement part of out frame framework welds in upright position, and every one deck arranges that even number welder symmetry is welded simultaneously, and from the one deck at top, order is down welded.This welding sequence can make every one deck ring flat-plate produce symmetrical welding contraction distortion, reduces the inclination of structural parts whole.
When completing the welding job of half, check the gradient of total part entirety by the method for step 4;
In the welding process of remainder, according to incline direction, welded first by rightabout welder.Utilize the contraction distortion of first welding side generation progressively to correct inclination, ensure the concentricity of total part postwelding.
Axial arrangement part herein refers to the connector between each ring flat-plate, and structural parts whole then refers to the overall structure comprising reference for assembling plate, ring flat-plate and axial arrangement part.
The concentricity of the multilayer ring flat-plate controlling axially welding is realized by above step.Adopt the out frame that method of the present invention makes, the enterprising luggage of mounting plate being greater than 3mm at physical plane degree is joined and welds, still can to align the radial position of every one deck ring flat-plate, the plug-in type parts such as smooth fitted key rod 5, spring rod and breather pipe, framework and out frame postwelding concentricity are less than 3mm, meet drawing requirement.
The above embodiments are only the preferred technical solution of the present invention, and should not be considered as restriction of the present invention, and the embodiment in the application and the feature in embodiment, when not conflicting, can be combined mutually.The technical scheme that protection scope of the present invention should be recorded with claim, the equivalents comprising technical characteristic in the technical scheme of claim record is protection domain.Namely the equivalent replacement within the scope of this improves, also within protection scope of the present invention.
Claims (10)
1. a concentricity control method for the axial welding of multilayer ring flat-plate, is characterized in that comprising the following steps:
One, the reference for assembling plate of morpheme size conforms designing requirement is made;
Two, the quadrantal points of reference for assembling plate and each layer ring flat-plate is determined, and in reference for assembling plate and each layer ring flat-plate outer rim or inner edge along thickness of slab direction groove;
Three, leveling reference for assembling plate;
Four, each layer ring flat-plate is assembled;
Distance sink tube (10) is used to carry out Primary Location to ring flat-plate to be assembled, to hang oneself plumb line (8) at four quadrantal points, by measuring the absolute value of plumb line to difference in size between ring flat-plate quadrantal points to be assembled and datum plate quadrantal points, obtain four data, by adjustment, make the difference of the maxima and minima of four data meet assembling and positioning requirement, and plumb line (8) align, and positions weldering at the groove in thickness of slab direction with ring flat-plate to be assembled and reference for assembling plate;
Five, axial arrangement part and reference for assembling plate and ring flat-plate are welded to connect;
The concentricity of the multilayer ring flat-plate controlling axially welding is realized by above step.
2. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 1, is characterized in that: adopt Digit Control Machine Tool at the quadrantal points position groove of reference for assembling plate and each layer ring flat-plate.
3. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 1, is characterized in that: adopt levelling device (7) and level measurement device (9) leveling reference for assembling plate;
In described levelling device (7), base (71) is provided with determines voussoir (72), determine voussoir (72) to be provided with and the movable wedge (73) of determining voussoir (72) and being slidably matched, the upper surface of movable wedge (73) is level, one end of movable wedge (73) is connected with screw rod (74), and screw rod (74) is through being connected with nut with the side plate (75) that base (71) is fixedly connected with.
4. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 3, it is characterized in that: described nut is gear nut (76), in the clamp (79) that what gear nut (76) rotatably can not move axially be arranged on is fixedly connected with side plate (75);
Gear nut (76) is connected with the gears meshing on the output shaft of planetary reduction gear (78), and the power shaft of planetary reduction gear (78) is connected with motor (77) by shaft coupling.
5. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 1, it is characterized in that: in described level measurement device (9), multiple measuring cylinder (93) is placed on submarginal position, reference for assembling plate upper surface, measuring cylinder is provided with liquid in (93), is communicated with between measuring cylinder (93) bottom by communicating pipe (94).
6. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 5, be is characterized in that: the height being measured liquid level by micrometric depth gauge.
7. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 5, it is characterized in that: measuring cylinder (93) is transparent material, float (92) is provided with in measuring cylinder (93), float (92) outer wall is provided with scale grating (91), and measuring cylinder (93) sidewall is provided with reflective gratings read head (95).
8. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 1, is characterized in that: axial arrangement part welds in upright position, and every one deck arranges that even number welder symmetry is welded simultaneously, and from the one deck at top, order is down welded.
9. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 8, is characterized in that: when completing the welding job of half, checks the gradient of total part entirety by the method for step 4;
In the welding process of remainder, according to incline direction, welded first by rightabout welder.
10. the concentricity control method of the axial welding of a kind of multilayer ring flat-plate according to claim 9, is characterized in that: utilize the contraction distortion of first welding side generation progressively to correct inclination, the concentricity of guarantee total part postwelding.
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| CN201510789646.7A CN105252178B (en) | 2015-11-17 | 2015-11-17 | Concentricity control method for axial welding of multilayer annular plates |
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| CN201510789646.7A CN105252178B (en) | 2015-11-17 | 2015-11-17 | Concentricity control method for axial welding of multilayer annular plates |
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| CN105252178B CN105252178B (en) | 2017-02-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109093895A (en) * | 2018-07-27 | 2018-12-28 | 浙江伟星实业发展股份有限公司 | A kind of mould bases and its mold core regulating device |
| CN109175050A (en) * | 2018-09-29 | 2019-01-11 | 张化机（苏州）重装有限公司 | The pressing tool of nuclear power safety injection tank end socket |
| CN110185848A (en) * | 2019-06-25 | 2019-08-30 | 云南工程建设总承包股份有限公司 | A kind of water string water-proof wing-ring rotational positioning welder |
| CN110280951A (en) * | 2019-07-05 | 2019-09-27 | 沪东中华造船(集团)有限公司 | A kind of welding method of ship special equipment pedestal |
| CN111981198A (en) * | 2020-07-29 | 2020-11-24 | 武汉华兴隆新能源科技有限公司 | Multi-connected air conditioner energy-saving environment-friendly fresh air system |
| CN113084406A (en) * | 2021-04-15 | 2021-07-09 | 常州机电职业技术学院 | Backing weld welding position frock |
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| CN113084406A (en) * | 2021-04-15 | 2021-07-09 | 常州机电职业技术学院 | Backing weld welding position frock |
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