CN104846174A - Device and method for eliminating residual weld joint stress of cylindrical pile leg - Google Patents
Device and method for eliminating residual weld joint stress of cylindrical pile leg Download PDFInfo
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- CN104846174A CN104846174A CN201510266574.8A CN201510266574A CN104846174A CN 104846174 A CN104846174 A CN 104846174A CN 201510266574 A CN201510266574 A CN 201510266574A CN 104846174 A CN104846174 A CN 104846174A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention provides a device and a method for eliminating the residual weld joint stress of a cylindrical pile leg. The device comprises a bottom plate, a frequency converter, motors, friction wheels and impact heads, wherein the motors and the frequency converter are arranged on the bottom plate; the motors are symmetrically arranged; each friction wheel is positioned on the corresponding motor; the cylindrical pile leg is positioned above the friction wheels; the impact heads are symmetrically arranged on the inner wall or the outer wall of the cylindrical pile leg; each impact head and the surface of a weld joint of the cylindrical pile leg form a 90-degree included angle; impact points are positioned on both sides of the weld joint. The whole device is simple in structure and wide in application range; the method for eliminating the residual weld joint stress of the cylindrical pile leg is convenient to operate, has the capabilities of lightening the labor intensity of workers and greatly improving the working efficiency and is favorable for realizing automatic operation.
Description
Technical field
The present invention relates to the manufacturing technology field of marine engineering equipment, particularly relate to a kind of welding residual stress cancellation element and method of offshore wind farm installation ship cylindrical leg.
Background technology
Along with the aggravation of energy scarcity situation and the growing tension of wind energy turbine set land resources, offshore wind power generation also becomes the development new direction of world today's wind power generation.The installation of offshore wind farm unit has higher technical difficulty relative to the installation of land Wind turbines, needs special wind turbine installation vessel to bear transport and install and just can complete.When wind turbine installation vessel operation at sea, spud leg declines and inserts seabed, and is promoted by wind turbine installation vessel and leave sea certain altitude, forms job platform.Therefore, spud leg is the key part of wind turbine installation vessel, carries the safety of whole wind-powered electricity generation erecting stage, and determines the setting accuracy of Wind turbines.
The cylindrical leg cylindrical housings diameter of wind turbine installation vessel is generally 2m ~ 5m, and thickness of slab is generally 100mm ~ 200mm, is highly generally 50m ~ 70 meter, belongs to the overweight precision equipment part of ultra-large type.The mode that the manufacture of cylindrical leg adopts segmentation to weld usually, because cylindrical leg all has higher requirement on bulk strength and dimensional precision, therefore, must control effectively to welding distortion, no side can have an impact to the size of spud leg and profile.And welding stress is the major cause causing spud leg bulk deformation, on the other hand, welding stress also can cause the fatigue property of commissure far below matrix metal.Visible, how to reduce or to regulate residual stress field, for raising spud leg bulk strength and dimensional precision significant.
Ultrasonic implement treatment is the major measure eliminated welding residual stress, improve welded construction anti-fatigue performance.No.52 Inst., Ministry of Chinese Weapons Industry discloses a kind of high-efficiency ultrasonic impact head (patent No.: ZL200810162683.5) eliminated for weld stress, adopt the toe of weld on processing welding lines both sides while of two pieces of symmetrical striker pin, significantly improve target efficiency, but this invention does not relate to the elimination to ultra-large type cylindrical leg welding residual stress.
Summary of the invention
Causing spud leg to be out of shape and removing method is not easy to the problem that operates, the scope of application is little for overcoming in the cylindrical leg unrelieved stress elimination process that exists in prior art, the invention provides a kind of for wind turbine installation vessel cylindrical leg weld residual stress cancellation element and method.
A kind of cylindrical leg weld residual stress cancellation element, it is characterized in that: comprise base plate, frequency transformer, motor, friction wheel and impact head, described motor and described frequency transformer are arranged on described base plate, described motor is for being symmetrical arranged, described friction wheel is positioned on described motor, described cylindrical leg is positioned at above described friction wheel, described impact head is symmetricly set on inwall or the outer wall of described cylindrical leg, it is 90 degree with the weld face angle of described cylindrical leg, the inwall of described impact head and described cylindrical leg or the position of wall contacts are shock point, described shock point is positioned at described weld seam both sides.
Described cylindrical leg external diametrical extent is 2m ~ 10m.
Motor described in described transducer drive; Described motor adopts speed control by frequency variation, the friction wheel from rotation described in driving, linear velocity continuously adjustabe between 0.5m/min ~ 1.5m/min of described friction wheel.
Described impact head is ultrasonic impact head.
Described friction wheel is 4, and described impact head is 2.
A kind of cylindrical leg weld residual stress removing method, comprises following step:
Step one, be positioned on friction wheel by flat sleeping for cylindrical leg to be welded;
Step 2, startup frequency transformer, drive-motor runs, and drives described friction wheel from rotation, makes described cylindrical leg stable constant speed Rotating with Uniform on described friction wheel;
Step 3, adjustment frequency transformer, make the linear velocity of the periphery of described cylindrical leg between 0.5m/min ~ 1.5m/min;
Step 4, impact head is symmetricly set on described cylindrical leg inwall, the weld face distance adjusting described impact head and described cylindrical leg is 2mm, and in 90 degree of angles;
Step 5, start described impact head, impact toe of weld symmetrically continuously when described cylindrical leg rotates, when described cylindrical leg rotates one week, stop impacting and rotation;
Step 6, described impact head is symmetricly set on described cylindrical leg outer wall, the weld face distance adjusting described impact head and described cylindrical leg is 2mm, and in 90 degree of angles;
Step 7, again start described impact head, impact described toe of weld symmetrically continuously when described cylindrical leg rotates, when described cylindrical leg rotates one week, stop impacting and rotating, complete unrelieved stress and eliminate and operate.
Described step one comprises: described cylindrical leg external diametrical extent is 2m ~ 10m.
Described step 2 comprises: described motor adopts speed control by frequency variation, and be symmetrical arranged, described friction wheel is 4.
Described step 4 comprises: described impact head is ultrasonic impact head, and quantity is 2.
Compared with prior art, the invention has the beneficial effects as follows: the invention provides a kind of cylindrical leg weld residual stress cancellation element and method, whole apparatus structure is simple, impact head is arranged symmetrically with, be conducive to the balance keeping spud leg internal stress, avoid removing the distortion causing spud leg in unrelieved stress process.Because wind turbine installation vessel cylindrical leg diameter is generally at more than 2m, therefore cylindrical leg method for removing residual stress of the present invention very convenient operation, be easy to the labour intensity alleviating workman, realize automated job.In addition, the present invention adopts the mode of continuous rotation, can remove fast and accurately, considerably increase working efficiency to the unrelieved stress of cylindrical leg weld seam.
Accompanying drawing explanation
Fig. 1 is the cancellation element schematic diagram of cylindrical leg weld residual stress;
Fig. 2 is the partial enlarged drawing of shock point in Fig. 1 (dotted portion).
Number in the figure: 1-spud leg, 2-impact head, 3-friction wheel, 4-motor, 5-frequency transformer, 6-base plate.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of cylindrical leg weld residual stress cancellation element, as shown in Figure 1, comprise base plate 6, frequency transformer 5, motor 3, friction wheel 4 and impact head 2, motor is symmetricly set on base plate, and frequency transformer is also arranged on base plate, and friction wheel is positioned on motor, the sleeping top being put in friction wheel 4 of cylindrical leg 1, two impact head 2 are symmetricly set on inwall or the outer wall of spud leg 1, are conducive to the balance keeping spud leg internal stress like this, avoid removing the distortion causing spud leg in unrelieved stress process.As shown in Figure 2, this impact head 2 is 90 degree with the weld face angle of cylindrical leg 1, and impact head 2 is shock point with the inwall of cylindrical leg 1 or the position of wall contacts, and shock point is positioned at weld seam both sides.In device of the present invention, friction wheel 4 is four, is divided into two groups, and motor 3 adopts speed control by frequency variation, drives friction wheel 4 to rotate, makes the linear velocity of friction wheel 4 continuously adjustabe between 0.5m/min ~ 1.5m/min.Motor 3 drives by a frequency transformer 5, to keep the rotating speed of all friction wheels 4 consistent, thus make spud leg 1 stable constant speed Rotating with Uniform on friction wheel 4, the process of the unrelieved stress removing cylindrical leg weld seam is become quick and precisely and uninterruptedly, increases work efficiency.
This device is applicable to the cylindrical leg that external diametrical extent is 2m ~ 10m, applied widely, and structure is simple, can effectively eliminate spud leg weld residual stress.
Preferably, the impact head of this device is high-efficiency ultrasonic impact head.
Because spud leg belongs to overlength super large part, segmental machining is generally taked to weld the manufacturing process of closing up again, so there is multiple weld seam in a spud leg, namely device of the present invention can vertical or horizontal arrangement multiple to adapt to spud leg length and placing direction, and multiple impact head is symmetricly set on segmentation on corresponding weld face carry out removal unrelieved stress operation.
Further, king-size cylindrical leg weld residual stress cancellation element can be manufactured, multiple motor and friction wheel are set on base plate, ensure that spud leg at the uniform velocity rotates, and multiple impact head is symmetricly set on corresponding weld face, simultaneously or segmentation the work of removal unrelieved stress is carried out to the multiple weld seams on cylindrical leg.
A kind of cylindrical leg weld residual stress removing method is provided in another embodiment of the present invention, be positioned on four friction wheels 3 by flat the crouching of cylindrical leg 1 to be welded, start frequency transformer 5, drive-motor 3 runs, thus drive all friction wheels 4 to rotate, make spud leg 1 constant speed Rotating with Uniform stably.Motor 3 adopts speed control by frequency variation, drives friction wheel 4 to rotate, and for ensureing that all friction wheel 4 rotating speeds are consistent, all motors drive by a frequency transformer 5.Continue regulate frequency transformer 5, the linear velocity of periphery when spud leg 1 is rotated between 0.5m/min ~ 1.5m/min, such as 1m/min.Two impact head 2 are symmetricly set on spud leg 1 inwall, and adjustment impact head 2 is 2mm with the distance of weld face, and in 90 degree of angles, start impact head 2, impact toe of weld symmetrically continuously when spud leg 1 rotates, the unrelieved stress of butt welded seam is eliminated.When spud leg 1 rotates one week, stop impacting and rotating, two impact head 2 are symmetricly set on spud leg 1 outer wall again, adjustment impact head 2 is 2mm with the distance of weld face, and in 90 degree of angles, again start impact head 2, after spud leg 1 rotates one week, stop impacting and rotating, namely complete whole unrelieved stresss and eliminate operation.
Preferably, the impact head adopted in the method is high-efficiency ultrasonic impact head.
The method is equally applicable to cylindrical leg that external diametrical extent is 2m ~ 10m and king-size cylindrical leg weld residual stress cancellation element, easy to operate, significantly reduces the labour intensity of workman, is beneficial to and realizes automated job.
A kind of cylindrical leg weld residual stress cancellation element provided by the invention and method, be arranged symmetrically with impact head, is conducive to the balance keeping spud leg internal stress, avoids removing the distortion causing spud leg in unrelieved stress process; Also adopt the mode of continuous rotation, can remove the unrelieved stress of cylindrical leg weld seam fast and accurately, considerably increase working efficiency.And wind turbine installation vessel cylindrical leg diameter is generally at more than 2m, the scope of application is wide, therefore whole apparatus structure of the present invention is simple, and method convenient operation, significantly reduces the labour intensity of workman, is conducive to realizing automated job.
Above-mentioned explanation illustrate and describes the preferred embodiments of the present invention, as previously mentioned, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in invention contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection domain of claims of the present invention.
Claims (10)
1. a cylindrical leg weld residual stress cancellation element, it is characterized in that: comprise base plate, frequency transformer, motor, friction wheel and impact head, described motor and described frequency transformer are arranged on described base plate, described motor is for being symmetrical arranged, described friction wheel is positioned on described motor, described cylindrical leg is positioned at above described friction wheel, described impact head is symmetricly set on inwall or the outer wall of described cylindrical leg, it is 90 degree with the weld face angle of described cylindrical leg, the inwall of described impact head and described cylindrical leg or the position of wall contacts are shock point, described shock point is positioned at described weld seam both sides.
2. device according to claim 1, is characterized in that: described cylindrical leg external diametrical extent is 2m ~ 10m.
3. device according to claim 1, is characterized in that: motor described in described transducer drive.
4. device according to claim 1, is characterized in that: described motor adopts speed control by frequency variation, the friction wheel from rotation described in driving, linear velocity continuously adjustabe between 0.5m/min ~ 1.5m/min of described friction wheel.
5. device according to claim 1, is characterized in that: described impact head is ultrasonic impact head.
6. device according to claim 1, is characterized in that: described friction wheel is 4, and described impact head is 2.
7. a cylindrical leg weld residual stress removing method, comprises following step:
Step one, be positioned on friction wheel by flat sleeping for cylindrical leg to be welded;
Step 2, startup frequency transformer, drive-motor runs, and drives described friction wheel from rotation, makes described cylindrical leg stable constant speed Rotating with Uniform on described friction wheel;
Step 3, adjustment frequency transformer, make the linear velocity of the periphery of described cylindrical leg between 0.5m/min ~ 1.5m/min;
Step 4, impact head is symmetricly set on described cylindrical leg inwall, the weld face distance adjusting described impact head and described cylindrical leg is 2mm, and in 90 degree of angles;
Step 5, start described impact head, impact toe of weld symmetrically continuously when described cylindrical leg rotates, when described cylindrical leg rotates one week, stop impacting and rotation;
Step 6, described impact head is symmetricly set on described cylindrical leg outer wall, adjustment impact head is 2mm with the weld face distance of described cylindrical leg, and is 90 degree of angles;
Step 7, again start described impact head, impact described toe of weld symmetrically continuously when described cylindrical leg rotates, when described cylindrical leg rotates one week, stop impacting and rotating, complete unrelieved stress and eliminate and operate.
8. method according to claim 7, is characterized in that: described step one comprises: described cylindrical leg external diametrical extent is 2m ~ 10m.
9. method according to claim 7, is characterized in that: described step 2 comprises: described motor adopts speed control by frequency variation, and be symmetrical arranged, described friction wheel is 4.
10. method according to claim 7, is characterized in that: described step 4 comprises: described impact head is ultrasonic impact head, and quantity is 2.
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| CN201510266574.8A CN104846174B (en) | 2015-05-22 | 2015-05-22 | A kind of cylindrical leg weld residual stress cancellation element and method |
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| CN201510266574.8A CN104846174B (en) | 2015-05-22 | 2015-05-22 | A kind of cylindrical leg weld residual stress cancellation element and method |
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Cited By (4)
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| CN108950173A (en) * | 2018-08-10 | 2018-12-07 | 燕山大学 | A kind of device and technique of online induction heating removal straight seam welded pipe residual stress |
| CN110423883A (en) * | 2019-08-08 | 2019-11-08 | 北京航空航天大学 | A kind of large ring rotating centrifugal residual stress regulation method |
| CN111020172A (en) * | 2019-12-18 | 2020-04-17 | 哈尔滨工业大学（威海） | Ultrasonic impact treatment device after welding of U rib outer weld of orthotropic bridge deck |
| CN116818555A (en) * | 2023-07-25 | 2023-09-29 | 中国航发北京航空材料研究院 | Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950173A (en) * | 2018-08-10 | 2018-12-07 | 燕山大学 | A kind of device and technique of online induction heating removal straight seam welded pipe residual stress |
| CN108950173B (en) * | 2018-08-10 | 2019-06-21 | 燕山大学 | A kind of device and technique of online induction heating removal straight seam welded pipe residual stress |
| CN110423883A (en) * | 2019-08-08 | 2019-11-08 | 北京航空航天大学 | A kind of large ring rotating centrifugal residual stress regulation method |
| CN111020172A (en) * | 2019-12-18 | 2020-04-17 | 哈尔滨工业大学（威海） | Ultrasonic impact treatment device after welding of U rib outer weld of orthotropic bridge deck |
| CN116818555A (en) * | 2023-07-25 | 2023-09-29 | 中国航发北京航空材料研究院 | Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank |
| CN116818555B (en) * | 2023-07-25 | 2024-02-02 | 中国航发北京航空材料研究院 | Method for determining pre-rotation speed of nickel-based superalloy wheel disc blank |
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| CN104846174B (en) | 2017-07-07 |
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Address after: 226000 No. 1, COSCO Road, Jiangsu, Nantong Co-patentee after: Jiangsu Institute of Technology Patentee after: Nantong COSCO Shipping Engineering Co., Ltd. Address before: 226006 No. 1, COSCO Road, Jiangsu, Nantong Co-patentee before: Jiangsu Institute of Technology Patentee before: COSCO Shipyard Group Co., Ltd. |