CN115074513A - Large tailor-welded blank performance regulation and control method and device based on current heating - Google Patents
Large tailor-welded blank performance regulation and control method and device based on current heating Download PDFInfo
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- CN115074513A CN115074513A CN202210593959.5A CN202210593959A CN115074513A CN 115074513 A CN115074513 A CN 115074513A CN 202210593959 A CN202210593959 A CN 202210593959A CN 115074513 A CN115074513 A CN 115074513A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/40—Direct resistance heating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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Abstract
The invention provides a method and a device for regulating and controlling the performance of a large tailor-welded blank based on current heating, wherein the method comprises the following steps: s1: installing the tailor-welded blank on a support frame; s2: electrodes are respectively placed on two sides of a welding seam of the tailor-welded blank, and the electrodes are enabled to tightly press the tailor-welded blank on the two sides of the welding seam to form a closed loop; s3: electrifying to heat the welding seam in the middle of the electrode to 400-1000 ℃, and preserving heat for 10 s-5 min to finish heat treatment of the welding seam; then lifting the electrode and moving to the position of the next section of welding line to be heat treated; s4: repeating S2-S3 until heat treatment is finished at all positions of the weld joint; s5: and taking out the tailor-welded blank to finish performance regulation. The invention utilizes the self-resistance heating characteristic of the material to directly heat the welding line without a large-size heating furnace, the regulating and controlling method has the advantages of high heating speed, short annealing time, no abnormal growth of crystal grains during subsequent solid solution and small influence on the forming performance.
Description
Technical Field
The invention relates to the technical field of metal plate forming, in particular to a large tailor-welded blank performance regulation method and device based on current heating.
Background
With the increasing requirement of aerospace equipment on light weight, light alloy with excellent specific strength and specific rigidity is widely applied to aerospace equipment. To meet the high reliability requirements, an integrated structure is urgently needed. Structural integration allows for larger and larger component sizes, with equivalent diameters or characteristic lengths even exceeding 5 meters. However, the integral forming of large-sized members requires a large slab as a blank. The width size of the plate produced industrially at present is seriously insufficient. Taking an aluminum alloy plate blank as an example, for a thin plate with the thickness of less than 5 millimeters, the maximum plate width amplitude can only reach 2.5 meters; the maximum plate width of the plate blank with larger thickness can only be 4 meters. The width of the plate cannot meet the integral forming requirement of the large member.
The large ultra-wide plate blank needs to adopt two or more pieces of plate materials for tailor welding. Common aluminum alloy tailor-welding methods include friction stir welding, argon arc welding, pulsed argon arc welding, laser welding, and the like. However, the welding seam of the tailor welded blank often causes the integral forming performance of the large-sized plate blank to be reduced, and the welding seam is easy to crack. More challenging is that the weld experiences structural property loss with subsequent heat treatment of the component, resulting in a component that fails to meet service performance requirements. For example, abnormal growth of grains occurs when the aluminum alloy friction stir welding seam is directly subjected to solution treatment. Therefore, after the welding of the large tailor-welded blank is finished, heat treatment is needed to be carried out so as to eliminate the defects of high energy state, high stress and the like of a welding line, achieve the structure performance similar to that of a base metal and meet the requirement of subsequent forming controllability.
The heat treatment of the welding seam needs not only uniform temperature, but also high heating speed so as to prevent the performance unevenness of the overlong welding seam and the weakening of the structure performance in the heat treatment process. However, the heat treatment of the large tailor-welded blank usually requires a matched large heating furnace, which is difficult to meet the requirement of uniform and rapid heating, otherwise the equipment cost is extremely high. In addition, the dimension of the large-sized plate blank in the thickness direction is extremely small relative to the dimension of the large-sized plate blank in the length direction, so that the plate blank is easy to deform in the heating process, and the subsequent forming is influenced. The performance regulation and control of large-scale ultra-wide tailor-welded blanks cannot be realized in the prior art.
Disclosure of Invention
According to the technical problem, the invention provides a large-scale tailor-welded blank performance regulation and control method based on current heating.
The technical means adopted by the invention are as follows:
a large tailor-welded blank performance regulation and control method based on current heating comprises the following steps:
s1: installing the tailor-welded blank on a support frame;
s2: arranging electrodes on two sides of a welding seam of the tailor-welded blank, and enabling the electrodes to tightly press the tailor-welded blank on the two sides of the welding seam to form a closed loop;
s3: electrifying to heat the welding seam in the middle of the electrode to 400-1000 ℃, preserving heat for 10 s-5 min, completing heat treatment of the welding seam, then lifting the electrode and moving to the position of the next section of welding seam to be heat treated;
s4: repeating S2-S3 until heat treatment is finished at all positions of the weld joint;
s5: and taking out the tailor-welded blank to finish performance regulation.
Preferably, the tailor-welded blank is a rolled plate with a wall thickness of 2-20 mm.
Preferably, the tailor-welded blank is one of light alloys such as aluminum alloy, magnesium alloy, titanium alloy, and the like.
The invention also discloses a large tailor-welded blank performance regulating and controlling device based on current heating, which comprises a support frame for supporting the tailor-welded blank, and preferably, the support frame comprises a frame body and a plurality of rollers arranged in the frame body. An insulating cloth is arranged between the supporting frame and the splice welding plate. The support frame is provided with a gantry-shaped mounting frame, a cross beam of the mounting frame is positioned right above a welding seam of the tailor-welded blank, the extending direction of the cross beam is parallel to the extending direction of the welding seam, a horizontal sliding block connected with the cross beam in a sliding manner is arranged on the cross beam, the sliding direction of the horizontal sliding block is parallel to the extending direction of the cross beam, a vertical sliding block connected with the horizontal sliding block in a sliding manner is arranged on the horizontal sliding block, and the sliding direction of the vertical sliding block is the vertical direction;
the vertical sliding block is fixedly provided with a connecting block, two supporting legs of the connecting block are respectively provided with an electrode through a short insulating plate, the two electrodes are respectively positioned on two sides of a welding line, and the electrodes are electrically connected with a power supply through a wire.
Preferably, a plurality of springs arranged side by side are arranged between the supporting leg and the insulating plate, the top ends of the springs are connected with the supporting leg, and the bottom ends of the springs are connected with the short insulating plate.
Preferably, the support frame is provided with a gap at the position of the welding line, two long insulating plates respectively positioned at two sides of the bottom of the welding line are arranged in the gap, and a long electrode is arranged at the top of each long insulating plate; the upper surfaces of the two long electrodes are respectively in contact connection with the lower surfaces of the tailor-welded blanks on the two sides of the welding line.
Preferably, a horizontal driving device for driving the horizontal sliding block to slide along the cross beam is arranged on the cross beam, and the horizontal driving device comprises a horizontal guide rail, a horizontal lead screw and a horizontal motor which are arranged on the cross beam; the extending direction of the horizontal guide rail is parallel to the extending direction of the cross beam and is in sliding fit with the horizontal sliding block, the output end of the horizontal lead screw is fixedly connected with the horizontal sliding block, and the input end of the horizontal lead screw is connected with the horizontal motor.
Preferably, a vertical driving device for driving the vertical sliding block to vertically slide is arranged on the horizontal sliding block, and the vertical driving device comprises a vertical guide rail, a vertical lead screw and a vertical motor which are arranged on the horizontal sliding block; the extending direction of the vertical guide rail is the vertical direction and is in sliding fit with the vertical sliding block, the output end of the vertical lead screw is fixedly connected with the vertical sliding block, and the input end of the vertical lead screw is connected with the vertical motor.
Compared with the prior art, the invention has the following advantages:
(1) the method and the device for regulating and controlling the performance of the large tailor-welded blank provided by the invention utilize the self-resistance heating characteristic of the material (when current passes through a conductor, the collision of electrons and atoms is intensified, the more violent the molecular motion is, the higher the temperature is) to directly heat the welding seam, and a large-size heating furnace is not needed;
(2) the method and the device for regulating and controlling the performance of the large tailor-welded blank are based on current self-resistance heating, not only have high heating speed and short annealing time, but also can utilize the integration effect of electrons on microscopic defects, avoid the weakening of the structure performance of a welding seam, eliminate the welding defects and improve the integral forming performance of the tailor-welded blank;
(3) according to the method and the device for regulating and controlling the performance of the large tailor-welded blank, the flexible clamping of the electrode is realized by the spring, and the segmented gradual heating of a welding seam is favorably realized;
(4) according to the method and the device for regulating and controlling the performance of the large tailor-welded blank, the detachable single-rail frame type structure is adopted to fix the electrode, so that the method and the device are convenient to build on a large thin-wall part forming field, and the difficulty in transporting the ultra-wide blank is avoided.
For the above reasons, the present invention can be widely applied to the fields of sheet metal forming and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a tailor-welded blank structure according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a large tailor-welded blank performance control device based on current heating according to an embodiment of the present invention.
FIG. 3 is a front view of an electrode and its connection structure according to an embodiment of the present invention.
Fig. 4 is a side view of an electrode and its connection structure in accordance with an embodiment of the present invention.
In the figure: 1. splicing and welding the plates; 1-1, welding; 2. a power source; 3. a wire; 4. a support frame; 5. a long insulating plate; 6. a long conductive plate; 7. a roller; 8. insulating cloth; 9. an electrode; 10. a short insulating plate; 11. a spring; 12. connecting blocks; 13. a vertical slide block; 14. a vertical guide rail; 15. a vertical screw rod; 16. a vertical electrode; 17. a horizontal slider; 18. a horizontal electrode; 19. a horizontal guide rail; 20 horizontal screw rods; 21. a cross member.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in fig. 1-4, in this embodiment, a performance control method for a large tailor-welded blank based on current heating is provided, where the tailor-welded blank 1 is a 2219 aluminum alloy blank with a size of 3 mx 2mm, and two blocks with a size of 3 mx 1.5 mx 2mm are tailor-welded by friction stir welding, and the weld width is 10mm, the length of the electrode 9 is 500mm, and the material is copper alloy. The method comprises the following specific steps:
s1: placing the tailor-welded blank 1 and the insulating cloth 8 on the support frame 4 through a roller 7;
s2: the horizontal motor 18 drives the horizontal sliding block 17 to move to the edge of the tailor-welded blank 1 to serve as an initial position, the vertical motor 16 drives the vertical sliding block 13 to move downwards, the electrodes 9 are placed on two sides of a welding seam 1-1 of the tailor-welded blank 1, and tight contact among the support frame 4, the connecting block 7, the insulating plate 8 and the electrodes 9 is guaranteed to form a closed current loop;
s3: the power supply 2 is connected with the electrode 9 through a lead 3, the welding seam 1-1 is heated by electrifying, and the current density is 1A/(mm) 2 S) increase the loading rate from 0 to 10A/mm 2 When the temperature reaches 540 ℃, preserving the heat for 10 s; then, the power supply 2 is turned off, the vertical slide block 13 is reset, the tailor-welded blank 1 is cooled to room temperature in the air, and the horizontal slide block 15 moves 500mm along the welding line 1-1;
s4: repeating the steps S2-S4 for six times to complete the heat treatment of the whole welding seam 1-1;
s5: and taking out the tailor-welded blank 1 to finish the performance regulation and control of the large-size tailor-welded blank.
The invention directly and rapidly heats the welding seam, reduces the tissue energy state of the welding seam, and avoids abnormal growth of welding seam crystal grains during solid solution, thereby avoiding abnormal weakening of welding seam performance during subsequent forming and enabling the deformation of the welding seam and the base metal to be more coordinated. The welding seam is directly heated, a large heating furnace is not needed, and the engineering realization difficulty of equipment is reduced. The welding seam is rapidly heated, the heating rate is high, the annealing time is short, overaging does not occur, and the structural state of the welding seam is improved, so that the strain concentration of the welding seam during subsequent forming is improved, and the cracking defect is avoided.
Example 2
As shown in fig. 1 to 4, this embodiment provides a method for adjusting and controlling performance of a large tailor-welded blank based on current heating, where the tailor-welded blank 1 is a TA15 titanium alloy blank with a size of 3 mx 4mm, two pieces of 3 mx 1.5 mx 4mm are tailor-welded by laser welding, a width of a weld is 5mm, a length of an electrode 9 is 600mm, and a material is copper alloy. The method comprises the following specific steps:
s1: placing the tailor-welded blank 1 and the insulating cloth 8 on the support frame 4 through a roller 7;
s2: the horizontal motor 18 drives the horizontal sliding block 17 to move to the edge of the tailor-welded blank 1 to serve as an initial position, the vertical motor 16 drives the vertical sliding block 13 to move downwards, the electrodes 9 are placed on two sides of a welding seam 1-1 of the tailor-welded blank 1, and tight contact among the support frame 4, the connecting block 7, the insulating plate 8 and the electrodes 9 is guaranteed to form a closed current loop;
s3: the power supply 2 is connected with the electrode 9 through a lead 3, a pulse direct current source is adopted, the welding line 1-1 is heated by electrifying, and the current density is 2A/(mm) 2 S) increase from 0 to 18A/mm 2 After that, the sample is kept for 10s and then continuously loaded to 20A/mm 2 When the temperature reaches 1000 ℃, preserving the heat for 2min, wherein the heating frequency is 2000 Hz; then, the power supply 2 is turned off, the vertical slide block 13 is reset, the tailor-welded blank 1 is cooled to room temperature in the air, and the horizontal slide block 15 moves 600mm along the welding line;
s4: repeating the steps S2-S4 five times to finish the heat treatment of the whole welding seam 1-1;
s5: and taking out the tailor-welded blank 1 to finish the performance regulation and control of the large-size tailor-welded blank.
Example 3
As shown in fig. 1-4, this example provides a performance control method for a large-scale tailor-welded blank based on current heating, in which the tailor-welded blank 1 is a 2195 aluminum-lithium alloy blank with a size of 6 mx 20mm, and three pieces of 6 mx 2 mx 20mm are tailor-welded by friction stir welding, and the width of the weld 1-1 is 25mm, the length of the electrode 9 is 600mm, and the material is copper alloy. The method comprises the following specific steps:
s1: placing the tailor-welded blank 1 and the insulating cloth 8 on the support frame 4 through a roller 7;
s2: the horizontal motor 18 drives the horizontal sliding block 17 to move to the edge of the tailor-welded blank 1 to serve as an initial position, the vertical motor 16 drives the vertical sliding block 13 to move downwards, the electrodes 9 are placed on two sides of a welding seam 1-1 of the tailor-welded blank 1, tight contact among the support frame 4, the connecting block 7, the insulating plate 8 and the electrodes 9 is guaranteed, and a closed current loop is formed;
s3: the power supply 2 is connected with the electrode 9 through the lead 3, the welding seam 1-1 is heated by electrifying, and the current density is 1.5A/(mm) 2 S) increase from 0 to 16A/mm 2 Keeping the temperature for 3s, and adjusting the temperature to 14A/mm 2 When the temperature reaches 600 ℃, preserving the heat for 10 s; then, the power supply 2 is turned off, the vertical slide block 13 is reset, the tailor-welded blank 1 is cooled to room temperature in the air, and the horizontal slide block 15 moves 600mm along the welding line;
s4: repeating the steps S2-S4 for twenty times to complete the heat treatment of the whole welding seam 1-1;
s5: and taking out the tailor-welded blank 1 to finish the performance regulation and control of the large-size tailor-welded blank.
Example 4
As shown in fig. 1-4, in this embodiment, a performance control method for a large-sized tailor-welded blank based on current heating is provided, in which a tailor-welded blank 1 is a 3 mx 2mm AZ31 magnesium alloy blank, three pieces of 3 mx 1 mx 2mm are tailor-welded by pulsed argon arc welding, a width of a weld 1-1 is 15mm, a length of an electrode 9 is 500mm, and a material is a copper alloy. The method comprises the following specific steps:
s1: placing the tailor-welded blank 1 and the insulating cloth 8 on the support frame 4 through a roller 7;
s2: the horizontal motor 18 drives the horizontal sliding block 17 to move to the edge of the tailor-welded blank 1 to serve as an initial position, the vertical motor 16 drives the vertical sliding block 13 to move downwards, the electrodes 9 are placed on two sides of a welding seam 1-1 of the tailor-welded blank 1, and tight contact among the support frame 4, the connecting block 7, the insulating plate 8 and the electrodes 9 is guaranteed to form a closed current loop;
s3: the power supply 2 is connected with the electrode 9 through a lead 3, the welding seam 1-1 is heated by electrifying, and the current density is 1A/(mm) 2 S) increase the loading rate from 0 to 8A/mm 2 When the temperature reaches 400 ℃, preserving the heat for 5 minutes; then, the power supply 2 is turned off, the vertical slide block 13 is reset, the tailor-welded blank 1 is cooled to room temperature in the air, and the horizontal slide block 15 moves 500mm along the welding line;
s4: repeating the steps S2-S4 for twelve times to complete the heat treatment of the whole welding seam 1-1;
s5: and taking out the tailor-welded blank 1 to finish the performance regulation and control of the large-size tailor-welded blank.
Example 5
As shown in fig. 1 to 4, this embodiment provides a large tailor-welded blank performance adjusting and controlling device based on current heating used in the methods of embodiments 1 to 4, including a supporting frame 4 for supporting the tailor-welded blank 1, where the supporting frame 4 includes a frame body and a plurality of rollers 7 disposed in the frame body. An insulating cloth 8 is arranged between the support frame 4 and the tailor-welded blank 1.
A gantry-shaped mounting frame is arranged on the support frame 4, a cross beam 21 of the mounting frame is positioned right above a welding line 1-1 of the tailor-welded blank 1, the extending direction of the cross beam 21 is parallel to the extending direction of the welding line 1-1, and a horizontal slider 17 connected with the cross beam 21 in a sliding manner, a horizontal guide rail 19 arranged on the cross beam 21, a horizontal lead screw 20 and a horizontal motor 18 are arranged on the cross beam 21; the extending direction of the horizontal guide rail 19 is parallel to the extending direction of the cross beam 21 and is in sliding fit with the horizontal sliding block 17, the output end of the horizontal lead screw 20 is fixedly connected with the horizontal sliding block 17, and the input end of the horizontal lead screw 20 is connected with the horizontal motor 18.
The horizontal sliding block 17 is provided with a vertical sliding block 13, a vertical guide rail 14 arranged on the horizontal sliding block 17, a vertical lead screw 15 and a vertical motor 16; the extending direction of the vertical guide rail 14 is vertical, and is in sliding fit with the vertical sliding block 17, the output end of the vertical lead screw 15 is fixedly connected with the vertical sliding block 17, and the input end of the vertical lead screw 15 is connected with the vertical motor 16.
A connecting block 12 is fixed on the vertical sliding block 13, two supporting legs of the connecting block 12 are respectively connected with a short insulating plate 10 through a plurality of springs 11 arranged side by side, electrodes 9 are respectively installed at the bottoms of the two short insulating plates 10, the two electrodes 9 are respectively positioned at two sides of the welding line 1-1, and the electrodes 9 are electrically connected with a power supply 2 through wires 3.
The support frame 4 is provided with a gap at the position of the welding line 1-1, two long insulating plates 5 which are respectively positioned at two sides of the bottom of the welding line 1-1 are arranged in the gap, and a long electrode 6 is arranged at the top of each long insulating plate 5; the upper surfaces of the two long electrodes 6 are respectively in contact connection with the lower surfaces of the tailor-welded blanks 1 at the two sides of the welding line 1-1. The length of the long electrode 6 is matched to the length of the weld 1-1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A large-scale tailor-welded blank performance regulation and control method based on current heating is characterized by comprising the following steps:
s1: installing the tailor-welded blank on a support frame;
s2: arranging electrodes on two sides of a welding seam of the tailor-welded blank, and enabling the electrodes to tightly press the tailor-welded blank on the two sides of the welding seam to form a closed loop;
s3: electrifying to heat the welding seam in the middle of the electrode to 400-1000 ℃, preserving heat for 10 s-5 min, completing heat treatment of the welding seam, then lifting the electrode and moving to the position of the next section of welding seam to be heat treated;
s4: repeating S2-S3 until heat treatment is finished at all positions of the weld joint;
s5: and taking out the tailor-welded blank to finish performance regulation.
2. The method for regulating and controlling the performance of the large-size tailor-welded blank according to claim 1, wherein the tailor-welded blank is a rolled plate with a wall thickness of 2-20 mm.
3. A method for regulating and controlling the performance of a large-size tailor-welded blank according to claim 1 or 2, wherein the tailor-welded blank is made of an aluminum alloy, a magnesium alloy or a titanium alloy.
4. A large-scale tailor-welded blank performance regulation and control device based on current heating is characterized by comprising a support frame for supporting a tailor-welded blank, wherein a gantry-shaped mounting frame is arranged on the support frame, a cross beam of the mounting frame is positioned right above a welding seam of the tailor-welded blank, the extending direction of the cross beam is parallel to the extending direction of the welding seam, a horizontal sliding block in sliding connection with the cross beam is arranged on the cross beam, the sliding direction of the horizontal sliding block is parallel to the extending direction of the cross beam, a vertical sliding block in sliding connection with the horizontal sliding block is arranged on the horizontal sliding block, and the sliding direction of the vertical sliding block is vertical;
the welding device is characterized in that a connecting block is fixed on the vertical sliding block, electrodes are mounted on two supporting legs of the connecting block through short insulating plates respectively, the two electrodes are located on two sides of a welding seam respectively, and the electrodes are electrically connected with a power supply through wires.
5. The large-scale tailor-welded blank performance control apparatus according to claim 4, wherein a plurality of springs are disposed between the supporting leg and the insulating plate, the springs are connected to the supporting leg at top ends thereof, and the springs are connected to the short insulating plate at bottom ends thereof.
6. The large-scale tailor-welded blank performance regulating device based on current heating according to claim 4, wherein the support frame has a gap at the position of the welding seam, two long insulating plates respectively located at two sides of the bottom of the welding seam are arranged in the gap, and a long electrode is arranged on the top of the long insulating plate;
the upper surfaces of the two long electrodes are respectively in contact connection with the lower surfaces of the tailor-welded blanks on the two sides of the welding line.
7. The large-scale tailor-welded blank performance regulating device based on current heating according to claim 4, wherein a horizontal driving device for driving the horizontal slider to slide along the beam is arranged on the beam, and the horizontal driving device comprises a horizontal guide rail, a horizontal lead screw and a horizontal motor which are arranged on the beam; the extending direction of the horizontal guide rail is parallel to the extending direction of the cross beam and is in sliding fit with the horizontal sliding block, the output end of the horizontal lead screw is fixedly connected with the horizontal sliding block, and the input end of the horizontal lead screw is connected with the horizontal motor.
8. The large-scale tailor-welded blank performance regulating device based on current heating according to claim 4, wherein a vertical driving device for driving the vertical sliding block to vertically slide is arranged on the horizontal sliding block, and the vertical driving device comprises a vertical guide rail, a vertical lead screw and a vertical motor which are arranged on the horizontal sliding block; the extending direction of the vertical guide rail is the vertical direction and is in sliding fit with the vertical sliding block, the output end of the vertical lead screw is fixedly connected with the vertical sliding block, and the input end of the vertical lead screw is connected with the vertical motor.
9. The large-scale tailor-welded blank performance adjusting and controlling device based on current heating according to claim 4, wherein an insulating cloth is arranged between said supporting frame and said tailor-welded blank.
10. The large-scale tailor-welded blank performance adjusting and controlling device based on current heating of claim 4, wherein said supporting frame comprises a frame body and a plurality of rollers arranged in the frame body.
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| CN202210593959.5A CN115074513A (en) | 2022-05-27 | 2022-05-27 | Large tailor-welded blank performance regulation and control method and device based on current heating |
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