CN211102271U - Device for controlling welding residual stress and deformation by local adjustable temperature field - Google Patents
Device for controlling welding residual stress and deformation by local adjustable temperature field Download PDFInfo
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- CN211102271U CN211102271U CN201920720832.9U CN201920720832U CN211102271U CN 211102271 U CN211102271 U CN 211102271U CN 201920720832 U CN201920720832 U CN 201920720832U CN 211102271 U CN211102271 U CN 211102271U
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Abstract
The utility model discloses a local adjustable temperature field control welding residual stress and deformation device, including the trough beam, install in heating device in the trough beam and with the controller that the heating device electricity is connected, heating device include a plurality of install in heating unit in the trough beam, the controller includes a plurality of the control unit, the control unit with heating unit is corresponding the setting, the control unit can real time control the heating temperature of heating unit butt welding spare, this local adjustable temperature field control welding residual stress and deformation device temperature control are accurate nimble, and easy operation and control welding residual stress and deformation are effectual.
Description
Technical Field
The utility model relates to a metal material welding technology field especially relates to a local adjustable temperature field control welding residual stress and deformation device.
Background
Welding residual stress and deformation are important factors affecting the performance, safety and reliability, and manufacturability of the welded structure. The welding residual stress can cause the generation of cold, hot cracks and other defects in the welded joint, and can also have adverse effects on the fracture characteristics, the fatigue strength and the shape and dimension precision of the structure under certain conditions. The welding residual deformation can prevent the welded plate from being directly used or can not meet the requirement of subsequent manufacture on the flatness of the welding piece. Therefore, how to reduce and eliminate the residual welding stress and deformation has been the subject of research and attack by researchers and engineers.
The root cause of the welding residual stress and deformation is the uneven temperature field caused by local heating of the welding heat source. The local concentrated heat source in the welding process of the thin plate causes an uneven temperature field with high temperature near the heat source and low temperature in the area far away from the heat source in the welded workpiece, and under the driving of the temperature field, the thermal expansion of the metal in the near seam area is restricted by the cooler parts at the two sides to generate elastic-plastic compression deformation. In the process of cooling the welding seam, the thermal shrinkage of the welding seam and the metal in the near seam area is limited by the restriction of the cooler parts at the two sides and also generates elastic-plastic tensile deformation. During the tensile stresses generated during cooling, the portion that exceeds the yield limit of the material is relieved, but tensile stresses near or below the yield strength remain, and correspondingly, compressive stresses are generated in equilibrium therewith in the region remote from the weld, eventually leading to buckling instability of the sheet weldment. In order to reduce and eliminate welding residual stress and deformation, researchers invent a plurality of methods implemented before, during and after welding, such as a pre-deformation method, a rigid fixation method, a rolling method, a mechanical stretching method, a temperature difference stretching method, a welding medium temperature difference stretching method, an electromagnetic hammer method, a pre-stress method, an impact rolling method with welding, an induction orthopedic method and the like. In these methods, some of the orthopedic effects are not significant enough; although some effects are good, the equipment is complex and the operation is troublesome; some work has large noise, pollutes the environment and causes harm to the health of people.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a local adjustable temperature field control welding residual stress and deformation device, the temperature control is accurate nimble, and the easy operation is with control welding residual stress and deformation are effectual.
The purpose of the utility model is realized by adopting the following technical scheme:
the utility model provides a local adjustable temperature field control welding residual stress and deformation device, include the channel beam, install in heating device in the channel beam and with the controller that heating device electricity is connected, heating device include a plurality of install in heating element in the channel beam, the controller includes a plurality of the control unit, the control unit with heating element is corresponding the setting, the control unit can real-time control the heating temperature of heating element butt welding spare.
Furthermore, the channel beam is single-side open, and the channel beam is made of carbon structural steel.
Further, a lining is arranged in the groove-shaped beam and is in groove-shaped arrangement, the direction of a notch of the lining is consistent with that of the notch of the groove-shaped beam, and the heating units are installed inside the lining.
Further, a heat insulation layer is further arranged in the channel beam and arranged between the lining and the channel beam.
Further, the heat insulation layer is made of asbestos or other heat insulation materials.
Further, a plurality of the heating units are equidistantly arranged along the length direction of the channel beam.
Further, the controller also comprises a master control end electrically connected with the plurality of control units.
Further, the heating unit is a resistance wire.
Furthermore, fixing assemblies are arranged at two ends of the groove-shaped beam and comprise two connecting plates arranged at two ends of the groove-shaped beam, long round holes are formed in the connecting plates, and fastening bolts are arranged in the long round holes.
Compared with the prior art, the beneficial effects of the utility model reside in that:
by arranging the plurality of heating units and arranging the plurality of control units corresponding to the heating units in a matching manner, the whole length of the metal in the two side areas of the part to be welded can be uniformly heated, and the local temperature can be adjusted in real time according to different positions of a welding heat source, so that the temperature control is accurate and flexible, the operation is easy, and the welding residual stress and deformation control effect is good.
Drawings
Fig. 1 is a schematic structural view of a device for controlling welding residual stress and deformation by a local adjustable temperature field according to the present invention;
FIG. 2 is a cross-sectional view of a device for controlling welding residual stress and deformation by a locally adjustable temperature field according to the present invention;
FIG. 3 is a state diagram of the welding residual stress and deformation device with a locally adjustable temperature field according to the present invention;
fig. 4 is a cross-sectional view at another angle of fig. 3.
In the figure: 10. a channel beam; 11. a liner; 12. a thermal insulation layer; 21. a heating unit; 301. a control unit; 31. a master control end; 40. a base plate; 41. the local adjustable temperature field controls the welding residual stress and deformation device; 411. fastening a bolt; 412. a connecting plate; 413. a long round hole; 50. welding a heat source; 60. and (5) a workpiece.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
The device for controlling welding residual stress and deformation through the local adjustable temperature field as shown in fig. 1-4 comprises a channel beam 10, a heating device installed in the channel beam 10, and a controller electrically connected with the heating device, wherein the heating device comprises a plurality of heating units 21 installed in the channel beam 10, the controller comprises a plurality of control units 301, the control units 301 and the heating units 21 are correspondingly arranged, and the control units 301 can control the heating temperature of the heating units 21 to welding pieces in real time.
When in use, the workpiece 60 to be welded is placed on the bottom plate 40 of the welding fixture and fixed in position. Then, a pair of devices 41 for controlling welding residual stress and deformation by local adjustable temperature fields are placed on two sides of the part to be welded of the workpiece 60 in parallel and symmetrically, after the distance between the device and the part to be welded is adjusted, the workpiece 60 between the device and the bottom plate 40 of the welding fixture is clamped by a fastener arranged on the welding fixture. The heating curve of each heating unit 21 is compiled according to the obtained process evaluation test results and the data is transmitted to the plurality of control units 301, the plurality of control units 301 control the heating temperature of the heating units 21, firstly, the metal to be welded positioned below the device of the application is uniformly preheated, and then the welding heat source 50 is started to weld the workpiece 60. In the welding process, the heating unit 21 parallel to the welding heat source 50 can be heated properly without changing the mechanical properties of the base metal and the weld metal, so as to enhance the effect of temperature difference stretching. The heating unit 21 located diagonally behind the welding heat source 50 may be shut down immediately or with a delay according to the difference in material properties and thickness of the workpiece 60. After the welding process is completed, the heating unit 21 is timely turned off by the controller. And after the temperature of the metal in the welding seam area is cooled, loosening the fastener, and taking out the workpiece 60 to finish the whole working process.
In addition, to reduce the effect of clamp heat conduction on the additional temperature field, the welding clamp does not apply an external force to the workpiece 60 over most of the length of the near seam region, but only acts to limit out-of-plane deformation during welding.
Specifically, the plurality of heating units 21 are disposed at equal intervals along the length direction of the channel beam 10, so as to adjust the degree of heating of each portion of the workpiece 60 to be welded, thereby reducing errors. The heating unit 21 in this application can be made of a resistance wire.
In addition, the controller also comprises a master control end 31 which is electrically connected with the plurality of control units 301, the master control end 31 in the application adopts S7-200P L C, so that a user can uniformly heat the whole length of metal at two side areas of a part to be welded according to the material of the workpiece 60 to be welded and can also adjust the local temperature in real time according to different positions of the welding heat source 50.
Specifically, the channel beam 10 is single-sided open, the outer end face and the two end faces of the open side of the channel beam are located in a plane, the distance between the inner end face and the outer end face is 0.1-0.3 mm, and the channel beam 10 is made of carbon structural steel.
In use, the channel beam 10 is open towards the work piece 60 to be welded to facilitate heating of the work piece 60 to be welded.
More specifically, the lining 11 is provided in the channel beam 10, the lining 11 is arranged in a channel shape, and the direction of the notch of the lining 11 is identical to the direction of the notch of the channel beam 10, and the plurality of heating units 21 are installed inside the lining 11.
The installation of the heating unit 21 is facilitated by providing the inner lining 11 in the channel beam 10.
In addition, still be provided with insulating layer 12 in the channel beam 10, insulating layer 12 sets up between inside lining 11 and channel beam 10 to part inside lining 11 and channel beam 10, when avoiding heating, the heat passes through inside lining 11 and transmits to channel beam 10 on, and when the welding, the user is the accident and touches channel beam 10 and is scalded, and when avoiding heating, heating element heats channel beam 10 in step, leads to treating that welded workpiece 60 is heated unevenly, influences the welding effect.
In particular, the insulating layer 12 is made of an asbestos material, but may be made of other insulating materials to prevent heat from being transferred to the channel beam 10.
Fixing assemblies are arranged at two ends of the channel beam 10 and comprise two connecting plates 412 arranged at two ends of the channel beam 10, long round holes 413 are formed in the connecting plates 412, and fastening bolts 411 are arranged in the long round holes 413.
When the welding device is used, a workpiece 60 to be welded is placed on the bottom plate 40, the two local adjustable temperature field control welding residual stress and deformation devices 41 are placed on two sides of a weld joint, the fastening bolt 411 penetrates through the long circular hole 413 to connect the two local adjustable temperature field control welding residual stress and deformation devices 41 with the bottom plate 40, the connecting plate 412 is slid to adjust the distance between the two local adjustable temperature field control welding residual stress and deformation devices 41, after the adjustment is completed, the fastening bolt 411 is screwed down to fix the two local adjustable temperature field control welding residual stress and deformation devices 41, and the weld joint is welded.
The distance between the welding residual stress and the deformation device 41 can be controlled by adjusting the two local adjustable temperature fields through the long round holes 413 arranged on the connecting plate 412 so as to meet the requirements of thin plate workpieces 60 made of different materials and different thicknesses on additional temperature fields, the distance between the additional temperature field of the device and the part to be welded can be very close, and the effect of temperature difference stretching can be improved.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (9)
1. The utility model provides a local adjustable temperature field control welding residual stress and deformation device which characterized in that: including the channel beam, install in heating device in the channel beam and with the controller that heating device electricity is connected, heating device include a plurality of install in heating unit in the channel beam, the controller includes a plurality of the control unit, the control unit with heating unit is corresponding the setting, the control unit can real-time control the heating temperature of heating unit butt welding piece.
2. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 1, characterized in that: the channel beam is single-side open, and the channel beam is made of carbon structural steel.
3. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 1, characterized in that: be provided with the inside lining in the channel beam, the inside lining is the cell type setting, just the notch orientation of inside lining with the notch orientation of channel beam is unanimous, and is a plurality of heating unit install in inside the inside lining.
4. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 3, characterized in that: and a heat insulation layer is also arranged in the channel beam and is arranged between the lining and the channel beam.
5. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 4, characterized in that: the heat insulation layer is made of asbestos.
6. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 1, characterized in that: the heating units are arranged along the length direction of the channel beam at equal intervals.
7. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 1, characterized in that: the controller also comprises a master control end electrically connected with the plurality of control units.
8. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 1, characterized in that: the heating unit is a resistance wire.
9. The device for controlling welding residual stress and deformation by local adjustable temperature field according to claim 1, characterized in that: the fixing assembly is arranged at two ends of the groove-shaped beam and comprises two connecting plates arranged at two ends of the groove-shaped beam, long round holes are formed in the connecting plates, and fastening bolts are arranged in the long round holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720832.9U CN211102271U (en) | 2019-05-17 | 2019-05-17 | Device for controlling welding residual stress and deformation by local adjustable temperature field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720832.9U CN211102271U (en) | 2019-05-17 | 2019-05-17 | Device for controlling welding residual stress and deformation by local adjustable temperature field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211102271U true CN211102271U (en) | 2020-07-28 |
Family
ID=71722363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920720832.9U Expired - Fee Related CN211102271U (en) | 2019-05-17 | 2019-05-17 | Device for controlling welding residual stress and deformation by local adjustable temperature field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211102271U (en) |
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2019
- 2019-05-17 CN CN201920720832.9U patent/CN211102271U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 |
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| CF01 | Termination of patent right due to non-payment of annual fee |