CN110900050A - Tool for welding rigid structural member with self-adaptive compensation of thermal stress - Google Patents
Tool for welding rigid structural member with self-adaptive compensation of thermal stress Download PDFInfo
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- CN110900050A CN110900050A CN201911298034.2A CN201911298034A CN110900050A CN 110900050 A CN110900050 A CN 110900050A CN 201911298034 A CN201911298034 A CN 201911298034A CN 110900050 A CN110900050 A CN 110900050A
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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
- 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
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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
- B23K37/003—Cooling means
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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
- B23K37/02—Carriages for supporting the welding or cutting element
Abstract
The invention discloses a rigid structural member welding tool with self-adaptive compensation of thermal stress, which comprises a plurality of heat dissipation columns, wherein the heat dissipation columns are attached to the surface of a welding workpiece and are close to a welding line. The welding line is divided into four parts, every two parts of the heat dissipation columns are symmetrically arranged by taking the welding line as a central line, in one side of the welding line, the heat dissipation column positioned on the surface of the welding line is a first heat dissipation column, and the heat dissipation column positioned on the surface of the welding workpiece, which is far away from the welding line, is a second heat dissipation column; the first heat-dissipating stud is closer to the weld than the second heat-dissipating stud. The first radiating column comprises a bottom plate, a radiating tube and a support, the bottom plate is pasted on the surface of a workpiece, the radiating tube extends upwards from the upper surface of the bottom plate, mercury is filled in the radiating tube, a plurality of fins are arranged on the outer surface of the upper end of the radiating tube, and the support supports the bottom plate, the radiating tube and the workpiece to be welded; the bottom plate is attached to the workpiece, and high temperature on the workpiece is transmitted into the heat dissipation pipe through the bottom plate.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a tool for welding a rigid structural part with self-adaptive compensation of thermal stress.
Background
Soldering is a process of joining two workpieces together, most commonly by melting the metals at the joint of the two metal parts into a liquid state and filling them with solder.
When welding, because the high temperature process is carried out, the metal at the welding seam has thermal stress due to uneven heating, if the workpiece is completely fixed during welding, the workpiece is kept in the original shape during welding, but the workpiece deforms when the thermal stress is released after welding, and the welding is a common welding defect.
In the prior art, the welding deformation is usually abutted by a pre-deformation method, but the deformation cannot be completely offset because the deformation cannot be accurately determined in advance, and the pre-deformation method causes the welding gun head at the welding seam to be inconvenient to work, and the pre-deformation of workpieces is inconvenient for welding in some forms such as vertical welding, fillet welding and the like.
The heat stress is accumulated in the welding seam to influence the welding seam strength, the defects of missing welding, missing welding and the like are often encountered, and in order to fully weld, the unexpected result caused by changing the metallographic structure in the area due to the larger heat affected zone of the workpiece is feared.
Disclosure of Invention
The invention aims to provide a tool for welding a rigid structural member with self-adaptive compensation of thermal stress, which is used for solving the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a tool for welding a rigid structural member with self-adaptive compensation of thermal stress comprises a plurality of heat dissipation columns, wherein the heat dissipation columns are attached to the surface of a welding workpiece and are close to a welding line.
The welding for flat plates or strip plates is not simple, and especially for welding plate workpieces at a certain angle, because welding seams can only appear on one side sometimes, the deformation after welding greatly influences the subsequent use of parts.
The welding stress is from uneven heating at the welding seam, the heat at the welding seam surface is concentrated, compared with the situation that the welding seam back is heated more, the welding process is heated to expand, if a workpiece has strong constraint, the expansion cannot be released, the heat stress is reserved as internal stress, an auxiliary tool is removed after the welding is finished, the heated part contracts after being cooled down, and the two ends of a finished product are warped upwards. Compare in traditional air heat dissipation or protective gas heat dissipation, directly contact with the work piece through the form of heat dissipation post and carry out temperature control, the heat flow that not only the heat was derived improves greatly, and the position is accurate controllable moreover, and temperature gradient isoparametric also can allocate.
For the welding of the flat plate with a larger area, because the welding seam is longer, if the number of the heat radiation columns is saved, the heat radiation columns can also move forward along with the welding seam, but the heat radiation columns lags behind the ongoing welding seam by a certain distance in the advancing direction of the welding seam.
Furthermore, the number of the heat dissipation columns is four, every two heat dissipation columns are grouped and symmetrically arranged by taking the welding line as a central line, in one side of the welding line, the heat dissipation column positioned on the surface where the welding line is located is a first heat dissipation column, and the heat dissipation column positioned on the surface of the welding workpiece, which is far away from the welding line, is a second heat dissipation column; the first heat-dissipating stud is closer to the weld than the second heat-dissipating stud.
The first heat dissipation column and the second heat dissipation column distributed on the upper surface and the lower surface respectively absorb certain heat from the workpiece to influence the temperature distribution in the workpiece, the first heat dissipation column and the second heat dissipation column are in close fit with the workpiece by default and have small thermal resistance, the heat in the workpiece can be rapidly transferred to the two heat dissipation columns, the heat dissipation column on the welding surface is close to the welding line to compress a high-temperature area on the welding line surface to be shorter, while the heat-dissipating stud on the back side is far away, the high temperature zone is compressed wider than the area on the weld face, but since the temperature on the back side is inherently lower to some extent than on the weld face, therefore, the product of the temperature rise and the temperature rise range can be approximately equal, and the length range of the temperature rise multiplied by the temperature rise is the expected thermal expansion amount on the length, the expected expansion amounts of the upper surface and the lower surface are equal, therefore, the effects of synchronous expansion and synchronous contraction are achieved, and deformation caused by nonuniform contraction in the follow-up process is eliminated.
Furthermore, the first radiating column comprises a bottom plate, a radiating tube and a support, the bottom plate is pasted on the surface of the workpiece, the radiating tube extends upwards from the upper surface of the bottom plate, mercury is filled in the radiating tube, a plurality of fins are arranged on the outer surface of the upper end of the radiating tube, and the support supports the bottom plate, the radiating tube and the welded workpiece;
the bottom plate is jointed with the workpiece, the high temperature on the workpiece is transmitted into the heat dissipation pipe through the bottom plate, the heat dissipation pipe is filled with mercury which has a lower melting point, the liquid state is formed at normal temperature, the boiling point is 357 ℃, when a workpiece is welded, the temperature near a welding line can be quickly raised to eighty-nine hundred DEG C, therefore, after the heat is absorbed by the heat dissipation column from the surface of the workpiece near the welding seam, when the heat is transferred to mercury, the mercury boils and evaporates, the heat of vaporization of the mercury can obviously take away a large amount of heat, compared with a solid radiating pipe which is directly hollowed and filled with mercury, the radiating pipe can achieve the purpose of quickly transferring heat from the bottom of the radiating pipe to the top of the radiating pipe, namely, the heat of the workpiece at the position where the first radiating pipe is attached is quickly transferred out, and a cooling area is formed on the workpiece, so that the purpose of allocating the temperature field of the workpiece is achieved. After mercury reachs the cooling tube upper end, cooling tube upper end surface is equipped with a large amount of fins and is used for the heat dissipation, and the mercury after the cooling condenses for liquid fall back cooling tube bottom again, and thermal transport can go on fast with the help of mercury, and the upper end of cooling tube can be made great and arrange as much as possible fin to the radiating power satisfies the demand.
The second heat dissipation column has a similar mounting structure to the first heat dissipation column, except that the heat dissipation tube of the second heat dissipation column also needs to be mounted upward, so that the bending process is performed.
Further, the base plate is fixed to the workpiece by a clip. The clamp has adjustable clamp force, can let the heat dissipation post have the subsides of certain pretightning force with the work piece tightly, prevents not hard up and the insufficient heat barrier that produces of contact.
Further, the frock still includes the amesdial, and the amesdial passes through the mounting bracket to be set up in the welding seam below, and the gauge outfit of amesdial contradicts the below in work piece gap, and first heat dissipation post includes three cooling tubes, and three cooling tubes distribute side by side in proper order with the direction of perpendicular to welding seam, and the cooling tube intermediate position is equipped with the on-off valve. The workpiece is freely arranged at the supporting position and is padded with a shock absorption pad.
The heat expansion conditions of the upper surface and the lower surface of the welding seam can be identified by the dial indicator, and the heat expansion degrees of the upper surface and the lower surface of the welding seam are generally unified by the heat dissipation columns, so that two workpieces do not need to be completely fixed outside, and only the workpieces need to be supported to be prevented from falling or overturning due to gravity. If the heat dissipation columns are slightly and incompletely matched, for example, the welding seam surface has more thermal expansion, the whole workpiece is warped upwards at the welding seam, the jumping degree detected by the dial indicator is reduced, at the moment, the high-temperature area on the welding seam surface is further compressed, and the on-off valve on the heat dissipation pipe close to the welding seam on the first heat dissipation column is opened, so that the heat dissipation pipe close to the welding seam starts to work, heat is absorbed from the workpiece, and the upward warping trend of the welding seam is inhibited; if the jumping value detected by the dial indicator is increased, which indicates that the welding seam is concave and deformed, the radiating pipe close to the welding seam on the first radiating column is disconnected and the radiating pipe far away from the welding seam is opened. The deformation of the welding seam can be fully detected by adding the dial indicator, the on-off of the related radiating pipe of the first radiating column is adjusted through the deformation direction obtained by detection, the internal temperature field of the workpiece is finely adjusted, and more accurate thermal expansion balance is achieved.
Preferably, the dial indicator is an electronic dial indicator, and the on-off valve is an electromagnetic valve and is electrically connected with the dial indicator. The electronic type and the electromagnetic valve can be conveniently connected with automatic control to complete automatic secondary adjustment.
Furthermore, a heat insulating sheet is arranged between the dial indicator head and the workpiece. The welding seam has very high temperature, if directly contact with the amesdial gauge head, then the amesdial can take place numerical value change or even damage the amesdial because of the temperature influence, can insulate heat behind the heat-insulating piece of bedding in, and the heat-insulating piece should be thinner or have extremely low coefficient of thermal expansion.
Further, the tool further comprises an excitation head, and the excitation head abuts against the surface of the workpiece.
The internal stress accumulated in the workpiece in the welding process can be released by the excitation head, the excitation is the excitation aging, the excitation aging is used in the cooling stage after the welding is finished, the internal stress can be eliminated in real time, compared with the situation that the internal stress is eliminated by the excitation aging after the cooling is finished, the excitation power can be reduced by the excitation aging in the workpiece cooling process, and the deformation is easy when the temperature is high, so that the effect of eliminating the internal stress can be achieved when the excitation force of the excitation head is set to be small. The material in the welding seam can be fully tamped to be uniform in the excitation process, and welding defects such as cracks and the like caused by nonuniform material in the later period are prevented.
Furthermore, the number of the excitation heads is four, the excitation heads are respectively positioned beside the four heat dissipation columns, and the excitation heads are closer to the welding line than the adjacent heat dissipation columns. The excitation head is mainly used for stress release in a welding area, and heat affected areas and non-welding areas are still demarcated by the heat dissipation columns at four positions.
Preferably, the upper part of the radiating pipe is immersed into a water tank. The heat dissipation on cooling tube upper portion is exactly the heat that work piece heat transfer came, and the air cooling radiating effect is limited, soaks in a water pitcher and carries out the heat radiation structure that the water-cooling can reduce cooling tube upper portion greatly, and it is can smoothly flow back the cooling tube bottom to be paid attention to the mercury that will guarantee that the cooling tube upper end condenses down.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the heat dissipation columns are respectively attached to the surfaces of the workpieces, in the welding process, the heat dissipation columns absorb heat from the workpieces and quickly transfer the heat to the upper ends of the heat dissipation tubes through mercury in the heat dissipation tubes, the heat influence areas are respectively defined on the welding seam surface and the back surface by the heat dissipation columns, the heat expansion of the welding seam surface and the heat expansion of the back surface are the same through the allocation of the setting positions, synchronous heat expansion and synchronous contraction are realized, the deformation of a welding part at the later stage is prevented, the upward convex deformation and the downward concave deformation of the welding seam are identified by the numerical value of the gauge heads of the dial gauges, the on-off of the heat dissipation; when the auxiliary welding device is used for auxiliary welding, the welding seam is narrower and deeper, and the combination of workpieces is tighter.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a schematic view of the temperature distribution at the weld of two workpieces;
FIG. 2 is a schematic view of the placement of the heat-dissipating stud of the present invention on a workpiece;
FIG. 3 is a schematic view of the temperature distribution on a workpiece as the invention is applied;
FIG. 4 is a schematic view of the mounting of a first heat-dissipating stud of the present invention to a workpiece;
FIG. 5 is a schematic view of the second heat-dissipating stud installed with a workpiece in accordance with the present invention;
FIG. 6 is a schematic view of the shape of a front and rear weld using the present invention.
In the figure: 1-a first radiating column, 11-a bottom plate, 12-a radiating pipe, 13-an on-off valve, 14-mercury, 19-a bracket, 2-a second radiating column, 3-a clip, 4-a dial indicator, 5-a heat insulating sheet and 6-a vibration excitation head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, a tool for welding a rigid structural member with adaptive compensation of thermal stress includes a plurality of heat-dissipating columns, which are attached to the surface of a welding workpiece and close to a weld.
The welding aiming at flat plates or strip-shaped plates is not simple, particularly for the welding of plate workpieces at a certain angle, because welding seams can only appear on one side sometimes, the subsequent use of parts is greatly influenced by the deformation after welding, and all the drawings in the invention are illustrated by welding workpieces in a flat mode.
As shown in fig. 1, the welding stress is caused by uneven heating at the welding seam, the heat at the welding seam surface is concentrated, and is more heated than the welding seam back surface, the welding stress is heated and expanded in the welding process, if the workpiece has strong constraint, the expansion cannot be released, the heat stress is kept as internal stress, the auxiliary tool is removed after the welding is finished, the heated part contracts after being cooled down, and the two ends of the finished product are warped upwards. Compare in traditional air heat dissipation or protective gas heat dissipation, directly contact with the work piece through the form of heat dissipation post and carry out temperature control, the heat flow that not only the heat was derived improves greatly, and the position is accurate controllable moreover, and temperature gradient isoparametric also can allocate.
For the welding of the flat plate with a larger area, because the welding seam is longer, if the number of the heat radiation columns is saved, the heat radiation columns can also move forward along with the welding seam, but the heat radiation columns lags behind the ongoing welding seam by a certain distance in the advancing direction of the welding seam.
As shown in fig. 2 and 3, the number of the heat dissipation columns is four, every two heat dissipation columns are grouped and symmetrically arranged by taking the welding seam as a central line, in one side of the welding seam, the heat dissipation column positioned on the surface of the welding seam is a first heat dissipation column 1, and the heat dissipation column positioned on the surface of the welding workpiece, which is far away from the welding seam, is a second heat dissipation column 2; the first heat-dissipating stud 1 is closer to the weld than the second heat-dissipating stud 2.
The first heat dissipation column 1 and the second heat dissipation column 2 distributed on the upper surface and the lower surface respectively absorb a certain amount of heat from the workpiece, as shown in fig. 3, and affect the temperature distribution in the workpiece, and by default, the first heat dissipation column 1 and the second heat dissipation column 2 are tightly attached to the workpiece and have small thermal resistance, and the heat in the workpiece can be rapidly transferred to the two heat dissipation columns, as shown in fig. 3, the heat dissipation columns on the welding surface are close to the weld joint, the curve on the workpiece in the figure is an isotherm, and compared with the case that the heat dissipation columns are not arranged in fig. 1, the high-temperature region on the welding surface is compressed to be shorter, and the heat dissipation columns on the back surface are far away, the high-temperature region is compressed to be wider compared with the region on the welding surface, but because the temperature on the back surface is inherently lower than the welding surface by a certain degree, the product of the temperature rise and the temperature rise range can be approximately equal, and the length, the expected expansion amounts of the upper surface and the lower surface are equal, so that the effect of synchronous expansion and synchronous contraction is achieved, and deformation caused by nonuniform contraction in the follow-up process is eliminated.
As shown in fig. 2 and 4, the first heat dissipation column 1 includes a bottom plate 11, a heat dissipation tube 12 and a bracket 19, the bottom plate 11 is attached to the surface of a workpiece, the heat dissipation tube 12 extends upward from the upper surface of the bottom plate 11, the heat dissipation tube 12 is filled with mercury 14, a plurality of fins are arranged on the outer surface of the upper end of the heat dissipation tube 12, and the bracket 19 supports the bottom plate 11, the heat dissipation tube 12 and the workpiece to be welded;
the base plate 11 is attached to the workpiece, the high temperature on the workpiece is transmitted to the heat dissipation tube 12 through the base plate 11, the heat dissipation tube 12 is filled with mercury 14, the mercury has a low melting point, the liquid state is formed at normal temperature, the boiling point is 357 ℃, when a workpiece is welded, the temperature near a welding line can be quickly raised to eighty-nine hundred DEG C, therefore, when the heat dissipation columns draw heat from the surface of the workpiece near the welding seam and transfer the heat to the mercury 14, the mercury 14 boils and evaporates, the heat of vaporization of the mercury 14 can obviously take away a large amount of heat, and is rapidly transferred to the top of the radiating pipe 12, which is hollowed and filled with mercury 14, compared to a solid radiating pipe directly, it is possible to achieve the object of rapidly transferring heat from the bottom of the radiating pipe 12 to the top of the radiating pipe 12, namely, the heat of the workpiece at the position where the first heat dissipation pipe 1 is attached is quickly transferred out, and a cooling area is formed on the workpiece, so that the purpose of allocating the temperature field of the workpiece is achieved. After mercury 14 reachs the cooling tube 12 upper end, cooling tube 12 upper end surface is equipped with a large amount of fins and is used for the heat dissipation, and the mercury after the cooling condenses for liquid falling back cooling tube 12 bottom again, and thermal transport can go on fast with the help of mercury 14, and the upper end of cooling tube 12 can be made great and arrange as much as possible fin to the radiating power satisfies the demand.
As shown in fig. 5, the second heat-dissipating stud 2 has a similar mounting structure to the first heat-dissipating stud 1, except that the heat-dissipating pipe of the second heat-dissipating stud 2 is also required to be mounted upward, and thus a bending process is required.
As shown in FIG. 6, after the temperature field of the workpiece is adjusted, the shape of the weld joint is correspondingly changed, and when the part of the invention is used for assisting welding, the weld joint is narrower and deeper, and the combination of the workpiece is tighter.
As shown in fig. 4 and 5, the base plate 11 is fixed to the workpiece by the clamp 3. The clamp 3 has adjustable clamping force, can let the heat dissipation post have the subsides of certain pretightning force with the work piece tightly, prevents not hard up and the insufficient heat barrier that produces of contact.
As shown in fig. 3, the tool further comprises a dial indicator 4, the dial indicator 4 is arranged below the welding seam through a mounting frame, the gauge head of the dial indicator 4 is abutted to the lower portion of the workpiece gap, the first radiating column 1 comprises three radiating pipes 12, the three radiating pipes 12 are sequentially distributed side by side in the direction perpendicular to the welding seam, and the on-off valves 13 are arranged in the middle positions of the radiating pipes 12. The workpiece is freely arranged at the supporting position and is padded with a shock absorption pad.
The heat expansion conditions of the upper surface and the lower surface of the welding seam can be identified by the dial indicator 4, and the heat expansion degrees of the upper surface and the lower surface of the welding seam are generally unified by the heat dissipation columns, so that two workpieces do not need to be completely fixed outside, and only the workpieces need to be supported to be prevented from falling or overturning due to gravity, the workpieces freely mounted at the supporting positions are heated and expanded in the welding process, spontaneous expansion towards two sides of the welding seam occurs, if the heat dissipation of the first heat dissipation column 1 and the second heat dissipation column 2 is reliable and the temperature field inside the allocated workpieces is uniform and appropriate, the dial indicator 4 head abutting against the lower part of the welding seam cannot detect displacement change, and the dial indicator 4 is pressed down in advance to have certain displacement to abut against the lower part of the welding seam. If the heat dissipation columns are slightly and incompletely prepared, for example, the welding seam surface has more thermal expansion, the whole workpiece warps upwards at the welding seam, the jumping degree detected by the dial indicator 4 is reduced, at the moment, the high-temperature area on the welding seam surface is further compressed, and the on-off valve 13 on the heat dissipation pipe 12 close to the welding seam on the first heat dissipation column 1 is opened, so that the heat dissipation pipe 12 close to the welding seam starts to work, heat is absorbed from the workpiece, and the upward warping trend of the welding seam is inhibited; if the jumping value detected by the dial indicator 4 is increased, which indicates that the welding seam is concave and deformed, the radiating pipe 12 close to the welding seam on the first radiating column 1 is disconnected, and the radiating pipe 12 far away from the welding seam is opened. The deformation of the welding seam can be fully detected by adding the dial indicator 4, the on-off of the related radiating pipe 12 of the first radiating column 1 is adjusted through the deformation direction obtained by detection, the internal temperature field of the workpiece is finely adjusted, and more accurate thermal expansion balance is achieved.
The dial indicator 4 is an electronic dial indicator, and the on-off valve 13 is an electromagnetic valve and is electrically connected with the dial indicator 4. The electronic type and the electromagnetic valve can be conveniently connected with automatic control to complete automatic secondary adjustment.
The dial gauge 4 is padded between the gauge head and the workpiece with a heat insulating sheet 5. The welding seam has very high temperature, if the welding seam is directly contacted with the head of the dial indicator 4, the dial indicator 4 can generate numerical value change due to temperature influence and even damage the dial indicator, heat can be isolated after the heat insulating sheet 5 is embedded, and the heat insulating sheet 5 is thin or has an extremely low thermal expansion coefficient.
As shown in fig. 3, the tool further comprises an excitation head 6, and the excitation head 6 abuts against the surface of the workpiece.
The internal stress accumulated in the workpiece in the welding process can be released by the excitation head 6, the excitation is the excitation aging, the excitation aging is used in the cooling stage after the welding is finished, the internal stress can be eliminated in real time, compared with the situation that the internal stress is eliminated by the excitation aging after the cooling is finished, the excitation power can be reduced by the excitation aging in the workpiece cooling process, and the deformation is easy when the temperature is high, so that the effect of eliminating the internal stress can be achieved when the excitation force of the excitation head is set to be small. The material in the welding seam can be fully tamped to be uniform in the excitation process, and welding defects such as cracks and the like caused by nonuniform material in the later period are prevented.
The number of the excitation heads 6 is four, the excitation heads are respectively positioned beside the four heat dissipation columns, and the excitation heads 6 are closer to the welding line than the adjacent heat dissipation columns. The excitation head 6 is mainly used for stress release in a welding area, and heat affected areas and non-welding areas are still separated from the four radiating columns.
The upper portion of the radiating pipe 12 is immersed in a water tank. The heat dissipation of the upper portion of the heat dissipation pipe 12 is the heat transferred from the heat of the workpiece, the air cooling heat dissipation effect is limited, the heat dissipation structure of the upper portion of the heat dissipation pipe 12 can be greatly reduced by immersing the heat dissipation pipe in a water tank for water cooling, and it should be noted that it is ensured that the mercury 14 condensed at the upper end of the heat dissipation pipe 12 can smoothly flow back to the bottom of the heat dissipation pipe 12.
The main operation process of the invention is as follows: two workpieces to be welded are placed on corresponding supports and can freely float along the supporting surfaces, the radiating columns are attached to the surfaces of the upper workpieces respectively, in the welding process, the radiating columns absorb heat from the workpieces and quickly transfer to the upper ends of the radiating tubes through mercury in the radiating tubes, heat affected areas are defined on the welding line surfaces and the back surfaces respectively, the welding line surfaces are enabled to be the same as the thermal expansion of the back surfaces through allocation of the set positions, synchronous thermal expansion and synchronous contraction are achieved, deformation of later-stage welding pieces is prevented, upward convex deformation and downward concave deformation of the welding line positions are identified through the numerical values of the dial gauges 4, the on-off of the radiating tubes in the first radiating columns is finely adjusted, and the thermal expansion degree of the upper surfaces and the lower surfaces of the.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a frock is used in rigid structure welding of thermal stress self-adaptation compensation which characterized in that: the tool comprises a plurality of heat dissipation columns, and the heat dissipation columns are attached to the surface of the welding workpiece and close to the welding line.
2. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 1, wherein the tooling comprises: the welding structure comprises four radiating columns, wherein the radiating columns are divided into two groups and symmetrically arranged by taking a welding line as a central line, the radiating column positioned on the surface of the welding line is a first radiating column (1) in one side of the welding line, and the radiating column positioned on the surface of a welding workpiece, which is far away from the welding line, is a second radiating column (2); the first heat dissipation column (1) is closer to the weld than the second heat dissipation column (2).
3. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 2, wherein the tooling comprises: the first radiating column (1) comprises a bottom plate (11), a radiating pipe (12) and a support (19), the bottom plate (11) is attached to the surface of a workpiece, the radiating pipe (12) extends upwards from the upper surface of the bottom plate (11), mercury (14) is filled in the radiating pipe (12), a plurality of fins are arranged on the outer surface of the upper end of the radiating pipe (12), and the support (19) supports the bottom plate (11), the radiating pipe (12) and the workpiece to be welded; the second heat dissipation column (2) is provided with a first heat dissipation column (1).
4. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 3, wherein the tooling comprises: the base plate (11) is fixed with the workpiece through the clamp (3).
5. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 3, wherein the tooling comprises: the frock still includes amesdial (4), amesdial (4) set up in the welding seam below through the mounting bracket, and the gauge outfit of amesdial (4) is contradicted the below in work piece gap, first heat dissipation post (1) includes three cooling tubes (12), three cooling tube (12) distribute side by side in proper order with the direction of perpendicular to welding seam, and cooling tube (12) intermediate position is equipped with on-off valve (13).
6. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 5, wherein the tooling comprises: the dial indicator (4) is an electronic dial indicator, and the on-off valve (13) is an electromagnetic valve and is electrically connected with the dial indicator (4).
7. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 5, wherein the tooling comprises: and a heat insulation sheet (5) is arranged between the head of the dial indicator (4) and the workpiece.
8. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 3, wherein the tooling comprises: the tool further comprises an excitation head (6), and the excitation head (6) abuts against the surface of the workpiece.
9. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 8, wherein the tooling comprises: the four excitation heads (6) are respectively positioned beside the four heat dissipation columns, and the excitation heads (6) are closer to the welding line than the adjacent heat dissipation columns.
10. The tooling for welding the rigid structural member with the self-adaptive compensation of the thermal stress according to claim 3, wherein the tooling comprises: the upper part of the radiating pipe (12) is immersed in a water tank.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011236820.2A CN112496623A (en) | 2019-12-17 | 2019-12-17 | Tool for welding rigid structural member with self-adaptive compensation of thermal stress |
| CN202011237169.0A CN112496624A (en) | 2019-12-17 | 2019-12-17 | Tool for welding rigid structural part with self-adaptive compensation of thermal stress |
| CN201911298034.2A CN110900050B (en) | 2019-12-17 | 2019-12-17 | Tool for welding rigid structural member with self-adaptive compensation of thermal stress |
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| CN202011236820.2A Division CN112496623A (en) | 2019-12-17 | 2019-12-17 | Tool for welding rigid structural member with self-adaptive compensation of thermal stress |
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| CN201911298034.2A Active CN110900050B (en) | 2019-12-17 | 2019-12-17 | Tool for welding rigid structural member with self-adaptive compensation of thermal stress |
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| CN116441696B (en) * | 2023-06-19 | 2023-09-15 | 中国航发成都发动机有限公司 | Vacuum electron beam welding method and clamping device for stator assembly of aero-engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112496623A (en) | 2021-03-16 |
| CN112496624A (en) | 2021-03-16 |
| CN110900050B (en) | 2020-12-22 |
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