A trapezoidal vertical bar type composite blank and a welding method thereof

Abstract

The present application provides a trapezoidal vertical bar type composite blank and a welding method thereof, comprising a lower base plate, the cross section of which is rectangular, a trapezoidal connecting vertical bar is sealed and welded at the edge of the top of the lower base plate, a composite plate is placed on the top of the lower base plate between the opposite sides of the four trapezoidal connecting vertical bars, the top of the four trapezoidal connecting vertical bars is sealed and welded with an upper base plate, and the lower base plate and the upper base plate are welded and fixed by submerged arc welding. Through the special design of the trapezoidal connecting vertical bar, the sealed welding of the lower base plate and the trapezoidal connecting vertical bar after the assembly, and the subsequent submerged arc welding and vacuum extraction, the oxidation of the base plate caused by the welding heat of the submerged arc welding can be effectively prevented, thereby improving the composite quality during rolling, the mechanical properties are more excellent, the cracking during rolling is effectively prevented, the yield of the composite plate is improved, the bonding quality is improved, and the waste of precious metals is reduced.

Description

Technical Field

[0001] This invention relates to the field of metal composite plate processing technology, specifically to a trapezoidal vertical strip composite blank and its welding method. Background Technology

[0002] Composite billet welding of carbon steel plates usually refers to joining two or more carbon steel plates together by welding technology, or welding carbon steel plates with other materials before rolling. This technology is widely used in construction, bridge, shipbuilding, pressure vessel, pipeline engineering and other fields.

[0003] Traditional composite billets are assembled using rectangular vertical bars. They consist of two carbon steel plates, with a cladding plate placed in the middle. Rectangular vertical bars are used to separate the cladding plate around the bottom plate. During billet preparation, the rectangular vertical bars around the bottom and bottom plates of the composite billet need to be sealed and submerged arc welded. However, the heat input during submerged arc welding is relatively large. After welding, the base plate is severely oxidized. The oxidized base plate hinders the bonding between the cladding plate and the base plate during rolling. It is particularly easy to produce delamination defects at the edges of the rectangular vertical bars in the submerged arc welded composite billet, which reduces the yield and causes a large waste of precious metals.

[0004] Therefore, this application proposes a trapezoidal vertical strip composite billet and its welding method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a trapezoidal vertical strip composite billet and its welding method, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A trapezoidal vertical strip composite blank and its welding method are disclosed, comprising a lower substrate with a rectangular cross-section, trapezoidal connecting strips sealed and welded to the edges of the top four sides of the lower substrate, a cover plate placed on the top of the lower substrate and between the opposite sides of the four trapezoidal connecting strips, and an upper substrate sealed and welded to the top of the four trapezoidal connecting strips, and the lower substrate and the upper substrate are welded and fixed by submerged arc welding, and an air extraction hole penetrating one of the trapezoidal connecting strips is opened on the opposite sides of the lower substrate and the upper substrate.

[0008] A welding method for a trapezoidal vertical bar composite billet, using the trapezoidal vertical bar composite billet described in the preceding claims, the welding method comprising the following steps:

[0009] S1: Place the lower substrate: Place the lower substrate on the welding equipment, which includes a support component, a positioning component, a welding component, an opening component, and an air extraction component. The lower substrate is placed on the support component, wherein the welding component is equipped with a sealing welding gun and a submerged arc welding gun.

[0010] S2: Positioning the lower substrate: Positioning the lower substrate placed on the support component using the positioning component;

[0011] S3: Place and position the trapezoidal connecting strip: Place the trapezoidal connecting strip at one edge of the top of the lower substrate, and position the trapezoidal connecting strip using the positioning component so that the side wall of the trapezoidal connecting strip is on the same vertical plane as the side wall of the lower substrate. Then, rotate the lower substrate horizontally using the bearing component, and place the other three trapezoidal connecting strips in sequence, and position the trapezoidal connecting strips using the positioning component.

[0012] S4: Seal welding is performed between the four trapezoidal connecting strips and the lower substrate in sequence: the sealing welding gun of the welding assembly is used to seal the connection between the trapezoidal connecting strips and the lower substrate, and the lower substrate is rotated horizontally by the bearing assembly. Seal welding is performed between the four trapezoidal connecting strips and the lower substrate in sequence, and a cover plate is placed between the four trapezoidal connecting strips.

[0013] S5: Place the upper substrate: Place the upper substrate on the four trapezoidal connecting strips and position the upper substrate using the positioning components;

[0014] S6: Seal welding between the upper substrate and the four trapezoidal connecting strips: Seal welding between the trapezoidal connecting strips and the upper substrate is performed by the sealing welding gun of the welding assembly, and the lower substrate is horizontally rotated by the bearing assembly to seal welding between the four trapezoidal connecting strips and the upper substrate in sequence.

[0015] S7: Submerged arc welding: The lower and upper substrates are fixed by submerged arc welding using the submerged arc welding gun of the welding assembly.

[0016] S8: Opening: An air extraction hole is opened on the opposite side of the lower substrate and the upper substrate through one of the trapezoidal connecting bars by means of an opening assembly;

[0017] S9: Vacuuming: Connect the vacuuming component to the vacuuming hole, and vacuum the cavity between the lower substrate, the four trapezoidal connecting strips and the upper substrate through the vacuuming component.

[0018] Furthermore: the welding equipment also includes a base, the supporting component is mounted on the base, the positioning component is mounted on the supporting component, the welding component is mounted on the base and located on one side of the supporting component, the opening component is mounted on the welding component, and the air extraction component is mounted on the base;

[0019] The base is symmetrically fixed with support rods at the top, and uprights are symmetrically fixed at the top of the base and on one side of the two support rods.

[0020] The supporting assembly includes a supporting plate hinged to two uprights. A circular hole is provided at the top of the supporting plate. A through hole is provided on the inner bottom wall of the supporting plate and located within the circular hole. A turntable is rotatably installed inside the circular hole. A rotating shaft is fixed at the bottom of the turntable and moves through the through hole. A driving component for driving the rotating shaft to rotate is installed on the supporting plate. An electric cylinder is hinged to the base and is hinged to the supporting plate. The positioning assembly is installed on the supporting plate.

[0021] Furthermore: the driving component includes a rotating rod rotatably mounted on the bottom of the support plate, one end of the rotating rod being connected to a rotating shaft via a bevel gear assembly, and an electric motor for driving the rotating rod to rotate is fixedly mounted on the bottom of the support plate.

[0022] Furthermore: the positioning assembly includes a sliding plate slidably mounted on the top of the support plate along the direction of the circular hole. A drive rod threadedly connected to the sliding plate is rotatably mounted on the support plate. A horizontal through groove is provided on the sliding plate. Two positioning blocks are slidably mounted horizontally on the sliding plate and within the through groove. An electromagnetic slider I connected to the positioning blocks is mounted on the sliding plate. One end of the positioning block extends to the side of the sliding plate near the circular hole. A movable plate is slidably mounted on the top of the positioning block along the direction of the sliding plate. Limit plates are fixed on the sides of the two movable plates that are close to each other. A vertical electric push rod II is fixed on the limit plate. An extension plate is fixed at the bottom of the electric push rod II. An electromagnetic slider II connected to the movable plate is fixedly mounted on the positioning block.

[0023] Furthermore: the welding assembly includes a base plate that slides horizontally onto the top of the base, the base plate being located on the side of the upright away from the support rod. An electromagnetic slider three connected to the base plate is fixedly installed on the base. Two vertical telescopic rods one are fixedly installed on the top of the base plate, and a fixing block is fixed to the top of the two telescopic rods one. An electric cylinder two connected to the fixing block is fixedly installed on the top of the base plate. Horizontally oriented telescopic rods two are symmetrically fixed on the fixing block. A bracket is fixedly installed at the telescopic ends of the two telescopic rods two. An electric cylinder three connected to the bracket is fixedly installed on the fixing block. An installation block is hinged to the bracket via a hinge shaft. A motor one connected to the hinge shaft is fixedly installed on the installation block. A connecting plate one is fixedly installed on the side of the installation block near the bearing plate. A connecting plate two is fixedly installed at the bottom of the installation block. A sealing welding torch is fixedly installed on the connecting plate two. A submerged arc welding torch is fixedly installed on the connecting plate one. The opening assembly is installed at the bottom of the installation block.

[0024] Furthermore: the hole-opening assembly includes two electric actuators symmetrically fixedly installed at the bottom of the mounting block and located on one side of the connecting plate 2. The piston rods of the two electric actuators 1 are fixed to the connecting plate 3. A drill bit in a vertical direction is rotatably installed on the connecting plate 3. A motor 2 for driving the drill bit to rotate is fixedly installed on the connecting plate 3.

[0025] Furthermore: the air extraction assembly includes a negative pressure pump fixedly installed on the base, a sliding block slidably installed horizontally in the groove and on the opposite side of the two positioning blocks, a horizontal vent pipe installed on the sliding block, a connecting pipe fixedly installed at the bottom of the support plate, one end of the connecting pipe being connected to the air inlet of the negative pressure pump through a corrugated hose one, and the other end being connected to the vent pipe through a corrugated hose two.

[0026] Furthermore: the vent pipe moves horizontally through the sliding block, and one end of the vent pipe near the round hole can be inserted into the air extraction hole and abut against the inner wall of the air extraction hole. A sleeve plate is fixed on the outer wall of the vent pipe on the side of the sliding block away from the round hole, and a tension spring sleeved on the outside of the vent pipe is fixedly installed between the sleeve plate and the opposite side of the sliding block.

[0027] Furthermore: the turntable has vertically oriented negative pressure holes symmetrically opened on both sides of the rotating shaft. A rotating joint is coaxially fixed to the outside of the rotating shaft. Two negative pressure pipes connected to the negative pressure holes are fixedly installed at one end of the rotating joint, and a connecting pipe is fixed at the other end. A solenoid valve is installed on the connecting pipe, and the connecting pipe is connected to the solenoid valve on the side away from the second corrugated hose.

[0028] This invention provides a trapezoidal vertical strip composite billet and its welding method. Compared with the prior art, it has the following advantages:

[0029] Through the special design of the trapezoidal connecting strips, the sealing weld after the lower substrate is assembled with the specially designed trapezoidal connecting strips, as well as the subsequent submerged arc welding and vacuuming, can effectively ensure that the substrate is not affected by the welding heat of submerged arc welding and thus prevent oxidation. This improves the composite quality during rolling and results in better mechanical properties. It also effectively ensures that the substrate does not crack during rolling, increases the yield of the composite plate, improves the bonding quality, and reduces the waste of precious metals. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A three-dimensional structural schematic diagram of the trapezoidal vertical strip composite blank of the present invention is shown;

[0032] Figure 2 A flowchart of the welding method for the trapezoidal vertical bar composite billet of the present invention is shown;

[0033] Figure 3A schematic diagram of the installation structure of the welding equipment of the present invention is shown;

[0034] Figure 4 A schematic diagram of the mounting structure of the drive component of the present invention is shown;

[0035] Figure 5 A schematic diagram of the mounting structure of the base plate of the present invention is shown;

[0036] Figure 6 A schematic diagram of the installation structure of the sliding block and the vent pipe of the present invention is shown;

[0037] Figure 7 A schematic diagram of the installation structure of the rotary joint of the present invention is shown;

[0038] Figure 8 The present invention is shown Figure 7 Enlarged view of point A in the middle;

[0039] Figure 9 A schematic diagram of the installation structure of the turntable of the present invention is shown;

[0040] Figure 10 A schematic diagram of the installation structure of the limiting plate of the present invention is shown;

[0041] Figure 11 A schematic diagram of the welding assembly of the present invention is shown;

[0042] Figure 12 A schematic diagram of the mounting structure of the opening assembly of the present invention is shown;

[0043] The diagram shows: 1. Lower base plate; 2. Trapezoidal connecting strip; 21. Air extraction hole; 3. Upper base plate; 4. Support assembly; 41. Support plate; 411. Circular hole; 412. Through hole; 42. Turntable; 421. Rotating shaft; 422. Negative pressure hole; 423. Rotary joint; 424. Negative pressure pipe; 425. Connecting pipe; 43. Driving component; 431. Rotating rod; 432. Bevel gear assembly; 433. Electric motor; 44. Electric cylinder one; 5. Positioning assembly; 51. Sliding plate; 511. Through slot; 52. Driving rod; 53. Positioning block; 54. Electromagnetic slider one; 55. Moving plate; 56. Limiting plate; 561. Electric push rod two; 562. Extension plate; 57. Electromagnetic slider two; 6. Welding assembly; 61. Base plate 611. Telescopic rod one; 612. Electric cylinder two; 62. Electromagnetic slider three; 63. Fixing block; 631. Telescopic rod two; 632. Electric cylinder three; 64. Bracket; 65. Mounting block; 651. Hinge shaft; 652. Motor one; 66. Connecting plate one; 67. Connecting plate two; 68. Sealing welding torch; 69. Submerged arc welding torch; 7. Hole opening assembly; 71. Electric actuator one; 72. Connecting plate three; 73. Drill bit; 74. Motor two; 8. Air extraction assembly; 81. Negative pressure pump; 82. Sliding block; 83. Vent pipe; 831. Sleeve plate; 832. Tension spring; 84. Connecting pipe; 841. Solenoid valve; 85. Corrugated hose one; 86. Corrugated hose two; 9. Base; 91. Support rod; 92. Upright pole. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] To address the technical problems in the background section, the following trapezoidal vertical strip composite billet and its welding method are provided:

[0047] Combination Figures 1-12 As shown, the present invention provides a trapezoidal vertical strip composite blank and its welding method, including a lower base plate 1 with a rectangular cross-section. Trapezoidal connecting strips 2 are sealed and welded to the edges of the top four sides of the lower base plate 1. A cover plate is placed on the top of the lower base plate 1 and between the opposite sides of the four trapezoidal connecting strips 2. An upper base plate 3 is sealed and welded to the top of the four trapezoidal connecting strips 2. The lower base plate 1 and the upper base plate 3 are welded and fixed by submerged arc welding. An air extraction hole 21 is opened on the opposite sides of the lower base plate 1 and the upper base plate 3, penetrating one of the trapezoidal connecting strips 2.

[0048] Through the special design of the trapezoidal connecting strip 2, the sealing weld after the lower substrate 1 and the specially designed trapezoidal connecting strip 2 are assembled, as well as the subsequent submerged arc welding and vacuuming, can effectively ensure that the substrate is not affected by the welding heat of submerged arc welding and thus prevent oxidation. This improves the composite quality during rolling and results in better mechanical properties. It also effectively ensures that the substrate does not crack during rolling, increases the yield of the composite plate, improves the bonding quality, and reduces the waste of precious metals.

[0049] A welding method for a trapezoidal vertical bar composite billet, using the trapezoidal vertical bar composite billet described in the preceding claims, the welding method comprising the following steps:

[0050] S1: Place the lower substrate 1: Place the lower substrate 1 on the welding equipment, which includes a support component 4, a positioning component 5, a welding component 6, an opening component 7, and an air extraction component 8. The lower substrate 1 is placed on the support component 4, wherein the welding component 6 is provided with a sealing welding gun 68 and a submerged arc welding gun 69.

[0051] S2: Positioning the lower substrate 1: Positioning the lower substrate 1 placed on the support component 4 using the positioning component 5;

[0052] S3: Place and position the trapezoidal connecting strip 2: Place the trapezoidal connecting strip 2 at one edge of the top of the lower substrate 1, and position the trapezoidal connecting strip 2 using the positioning component 5 so that the side wall of the trapezoidal connecting strip 2 is on the same vertical plane as the side wall of the lower substrate 1. Then, rotate the lower substrate 1 horizontally using the bearing component 4, and place the other three trapezoidal connecting strips 2 in sequence, and position the trapezoidal connecting strips 2 using the positioning component 5.

[0053] S4: Seal welding is performed between the four trapezoidal connecting strips 2 and the lower substrate 1 in sequence: the sealing welding gun 68 of the welding component 6 is used to seal welding between the trapezoidal connecting strips 2 and the lower substrate 1, and the lower substrate 1 is rotated horizontally by the bearing component 4. Seal welding is performed between the four trapezoidal connecting strips 2 and the lower substrate 1 in sequence, and a cover plate is placed between the four trapezoidal connecting strips 2.

[0054] S5: Place the upper substrate 3: Place the upper substrate 3 on the four trapezoidal connecting strips 2, and position the upper substrate 3 using the positioning component 5;

[0055] S6: Seal welding between the upper substrate 3 and the four trapezoidal connecting strips 2: Seal welding between the trapezoidal connecting strips 2 and the upper substrate 3 is performed by the sealing welding gun 68 of the welding assembly 6, and the lower substrate 1 is horizontally rotated by the bearing assembly 4, and the four trapezoidal connecting strips 2 and the upper substrate 3 are sealed welding in sequence.

[0056] S7: Submerged arc welding: The lower substrate 1 and the upper substrate 3 are fixed by submerged arc welding using the submerged arc welding gun 69 of the welding assembly 6.

[0057] S8: Opening: An air extraction hole 21 is opened on the opposite side of the lower substrate 1 and the upper substrate 3 by the opening component 7, penetrating one of the trapezoidal connecting bars 2;

[0058] S9: Vacuuming: Connect the vacuuming component 8 to the vacuuming hole 21, and vacuum the cavity between the lower substrate 1, the four trapezoidal connecting strips 2 and the upper substrate 3 through the vacuuming component 8.

[0059] In this embodiment, the welding equipment further includes a base 9, the supporting component 4 is mounted on the base 9, the positioning component 5 is mounted on the supporting component 4, the welding component 6 is mounted on the base 9 and located on one side of the supporting component 4, the opening component 7 is mounted on the welding component 6, and the air extraction component 8 is mounted on the base 9.

[0060] The base 9 is symmetrically fixed with support rods 91 on its top, and uprights 92 are symmetrically fixed on the top of the base 9 and on one side of the two support rods 91.

[0061] The supporting assembly 4 includes a supporting plate 41 hinged to two uprights 92. The top of the supporting plate 41 has a circular hole 411. A through hole 412 is formed on the inner bottom wall of the supporting plate 41 and located in the circular hole 411. A turntable 42 is rotatably installed in the circular hole 411. A rotating shaft 421 that movably passes through the through hole 412 is fixed at the bottom of the turntable 42. A driving component 43 for driving the rotating shaft 421 to rotate is installed on the supporting plate 41. An electric cylinder 44 that is hinged to the supporting plate 41 is mounted on the base 9. The positioning assembly 5 is installed on the supporting plate 41.

[0062] In this embodiment, the driving component 43 includes a rotating rod 431 rotatably mounted on the bottom of the support plate 41. One end of the rotating rod 431 is connected to the rotating shaft 421 through a bevel gear assembly 432. A motor 433 for driving the rotating rod 431 to rotate is fixedly mounted on the bottom of the support plate 41. In use, the motor 433 is turned on, and the output shaft of the motor 433 rotates, driving the rotating rod 431 to rotate at the bottom of the support plate 41. Thus, the rotating shaft 421 can be driven to rotate through the bevel gear assembly 432, which is easy to control.

[0063] Example 2

[0064] like Figures 1-12 As shown, based on the above embodiments, this embodiment further provides the following:

[0065] In this embodiment, the positioning component 5 includes a sliding plate 51 slidably mounted on the top of the support plate 41 along the direction of the circular hole 411. A drive rod 52 threadedly connected to the sliding plate 51 is rotatably mounted on the support plate 41. A horizontal through groove 511 is formed on the sliding plate 51. Two positioning blocks 53 are slidably mounted horizontally on the sliding plate 51 and within the through groove 511. An electromagnetic slider 54 connected to the positioning blocks 53 is mounted on the sliding plate 51. One end of the positioning block 53 extends to the side of the sliding plate 51 near the circular hole 411. A moving plate 55 is slidably mounted on the top of the positioning block 53 along the direction of the sliding plate 51. Limiting plates 56 are fixed on the sides of the two moving plates 55 that are close to each other. A vertically oriented electric actuator is fixed on the limiting plate 56. Rod 2 561, electric push rod 2 561 has an extension plate 562 fixed at its bottom, and electromagnetic slider 2 57 connected to moving plate 55 is fixedly installed on positioning block 53. In use, the lower base plate 1 is placed on top of the support plate 41 and located on turntable 42. Rotating drive rod 52 causes sliding plate 51 to move closer to the circular hole 411 on support plate 41, so that sliding plate 51 is in contact with lower base plate 1. Controlling two electromagnetic sliders 1 54 causes two positioning blocks 53 to move closer to each other, so that both positioning blocks 53 are in contact with lower base plate 1, thus achieving positioning of lower base plate 1. Through the cooperation of two electromagnetic sliders 1 54, two electromagnetic sliders 2 57, two electric push rods 2 561 and drive rod 52, the positioning effect of trapezoidal connecting strip 2 can be achieved, and the operation is simple.

[0066] In this embodiment, the welding assembly 6 includes a base plate 61 that is horizontally slidably mounted on the top of the base 9. The base plate 61 is located on the side of the upright 92 away from the support rod 91. An electromagnetic slider 62 connected to the base plate 61 is fixedly mounted on the base 9. Two vertical telescopic rods 611 are fixedly mounted on the top of the base plate 61. A fixing block 63 is fixed to the top of the two telescopic rods 611. An electric cylinder 612 connected to the fixing block 63 is fixedly mounted on the top of the base plate 61. Horizontal telescopic rods 631 are symmetrically fixed on the fixing block 63. The extension of the two telescopic rods 631... A bracket 64 is fixedly installed at the constricted end. An electric cylinder 632 connected to the bracket 64 is fixedly installed on the fixing block 63. A mounting block 65 is hinged to the bracket 64 via a hinge shaft 651. A motor 652 connected to the hinge shaft 651 is fixedly installed on the mounting block 65. A connecting plate 66 is fixedly installed on the side of the mounting block 65 near the bearing plate 41. A connecting plate 67 is fixedly installed on the bottom of the mounting block 65. A sealing welding torch 68 is fixedly installed on the connecting plate 67. A submerged arc welding torch 69 is fixedly installed on the connecting plate 66. The opening assembly 7 is installed on the bottom of the mounting block 65.

[0067] In this embodiment, the hole-opening assembly 7 includes two electric actuators 71 symmetrically fixedly installed at the bottom of the mounting block 65 and located on one side of the connecting plate 67. The piston rods of the two electric actuators 71 are fixed to the connecting plate 72. A vertically oriented drill bit 73 is rotatably installed on the connecting plate 72. A motor 74 for driving the drill bit 73 to rotate is fixedly installed on the connecting plate 72. When opening the air extraction hole 21, the mounting block 65 is rotated by the motor 652 driving the hinge shaft 651 to rotate, so that the drill bit 73 is facing the trapezoidal connecting strip 2. The motor 74 is controlled to make the drill bit 73 rotate on the connecting plate 72. The two electric actuators 71 are controlled to move the connecting plate 72 closer to the trapezoidal connecting strip 2, thus achieving the effect of opening a hole in the trapezoidal connecting strip 2. The operation is simple.

[0068] Example 3

[0069] like Figures 1-12 As shown, based on the above embodiments, this embodiment further provides the following:

[0070] In this embodiment, the vacuum assembly 8 includes a negative pressure pump 81 fixedly mounted on the base 9, a sliding block 82 horizontally slidably mounted in the groove 511 and on opposite sides of the two positioning blocks 53, a horizontally oriented vent pipe 83 mounted on the sliding block 82, and a connecting pipe 84 fixedly mounted on the bottom of the support plate 41. One end of the connecting pipe 84 is connected to the air inlet of the negative pressure pump 81 through a corrugated hose 85, and the other end is connected to the vent pipe 83 through a corrugated hose 86. When vacuuming the composite blank, the motor 433 is controlled to rotate the turntable 42. The side of the composite blank with the air extraction hole 21 is aligned with the sliding plate 51, and the sliding block 82 slides in the through groove 511, so that the vent pipe 83 is aligned with the air extraction hole 21. The driving rod 52 causes the sliding plate 51 to move closer to the round hole 411 on the bearing plate 41, so that the vent pipe 83 comes into contact with the composite blank. The vent pipe 83 is connected to the air extraction hole 21. By controlling the negative pressure pump 81 to work, the air inside the composite blank can be extracted outward through the vent pipe 83, the second corrugated hose 86, the connecting pipe 84, and the first corrugated hose 85, so as to achieve the effect of vacuuming the inside of the composite blank.

[0071] In this embodiment, the vent pipe 83 moves horizontally through the sliding block 82. One end of the vent pipe 83 near the circular hole 411 can be inserted into the suction hole 21 and abuts against the inner wall of the suction hole 21. A sleeve plate 831 is fixed to the outer wall of the vent pipe 83 on the side of the sliding block 82 away from the circular hole 411. A tension spring 832 is fixedly installed between the sleeve plate 831 and the opposite side of the sliding block 82, sleeved on the outside of the vent pipe 83. By setting the sleeve plate 831 and the tension spring 832, the vent pipe 83 moves horizontally through the sliding block 82. The end of the vent pipe 83 near the circular hole 411 can be inserted into the suction hole 21 and abuts against the inner wall of the suction hole 21. One end of the circular hole 411 can be inserted into the air extraction hole 21. When the composite blank is evacuated, the vent pipe 83 forms contact with the inner wall of the air extraction hole 21, which is conducive to the air being extracted out of the composite blank. Furthermore, rotating the drive rod 52 causes the sliding plate 51 to move closer to the circular hole 411 on the support plate 41. When the sliding plate 51 is in contact with the lower substrate 1, the vent pipe 83 slides away from the composite blank on the sliding plate 51. The tension spring 832 deforms, thus not affecting the positioning of the composite blank by the sliding plate 51 in contact with the lower substrate 1.

[0072] In this embodiment, the turntable 42 has symmetrically arranged negative pressure holes 422 in a vertical direction on both sides of the rotating shaft 421. A rotary joint 423 is coaxially fixed to the outside of the rotating shaft 421. Two negative pressure pipes 424, respectively connected to the negative pressure holes 422, are fixedly installed at one end of the rotary joint 423, and a connecting pipe 425 is fixed at the other end. A solenoid valve 841 is installed on the connecting pipe 84, and the connecting pipe 425 is connected to the connecting pipe 84 on the side of the solenoid valve 841 away from the corrugated hose 86. By setting the negative pressure holes 422 and the rotary joint 422, the negative pressure holes 422 and the rotary joint 422 are connected to each other. 3. The special design of the negative pressure pipe 424, the connecting pipe 425 and the solenoid valve 841 allows for the following process during the welding of the composite billet: After the lower substrate 1 is placed on top of the support plate 41 and located on the turntable 42, the solenoid valve 841 is closed. At this time, the negative pressure pump 81 is activated, which draws air out of the negative pressure hole 422 through the connecting pipe 425, the rotating joint 423 and the negative pressure pipe 424. This creates a negative pressure between the lower substrate 1 and the support plate 41, achieving a negative pressure positioning effect between the lower substrate 1 and the support plate 41 and improving the positioning effect of the composite billet.

[0073] Working principle and usage process of this invention:

[0074] When welding this composite blank, the lower substrate 1 is placed on top of the support plate 41 and on the turntable 42. The drive rod 52 is rotated to move the sliding plate 51 towards the circular hole 411 on the support plate 41, so that the sliding plate 51 is in contact with the lower substrate 1. The two electromagnetic sliders 54 are controlled to move the two positioning blocks 53 closer together, so that both positioning blocks 53 are in contact with the lower substrate 1, thus positioning the lower substrate 1. Then, the two electromagnetic sliders 57 are controlled to move the two moving plates 55 away from the sliding plate 51. The trapezoidal connecting strip 2 is placed on top of the lower substrate 1, on the opposite side of the sliding plate 51 and the two extension plates 562. The two electric push rods 561 are controlled to make both extension plates 562 contact the lower substrate 1. Then, the two electromagnetic sliders 57 are controlled to move the two moving plates 55 towards the sliding plate 51. The trapezoidal connecting strip 2 can be positioned. At this time, the staff manually spot welds the lower base plate 1 and the trapezoidal connecting strip 2 together. After the trapezoidal connecting strip 2 is positioned, the two electric push rods 561 are controlled to move the two extension plates 562 above the trapezoidal connecting strip 2. The two electromagnetic sliders 54 are controlled to move the two positioning blocks 53 away from each other. Then the drive rod 52 is rotated in the opposite direction to make the sliding plate 51 slide back to its original position. Then the motor 433 is controlled to make the rotating shaft 421 rotate, which makes the turntable 42 rotate, thereby driving the lower base plate 1 to rotate. When the lower base plate 1 rotates 90 degrees, the two electromagnetic sliders 54, the two electromagnetic sliders 57, the two electric push rods 561 and the drive rod 52 are coordinated to position an adjacent trapezoidal connecting strip 2. By analogy, the positioning of four trapezoidal connecting strips 2 can be achieved.

[0075] During this process, the control motor 433 rotates the rotating shaft 421, causing the turntable 42 to rotate. When the side of the lower substrate 1 with the trapezoidal connecting strip 2 placed on top rotates to the side closer to the base plate 61, the motor 652 drives the hinge shaft 651 to rotate, causing the mounting block 65 to rotate, so that the sealing welding torch 68 is directly facing the trapezoidal connecting strip 2. Through the cooperation of the electric cylinders 612 and 632, the sealing welding torch 68 is brought into contact with the connection between the trapezoidal connecting strip 2 and the lower substrate 1. The electromagnetic slider 62 moves the base plate 61 to one end of the trapezoidal connecting strip 2, and then controls the electromagnetic slider 62 to slide the base plate 61 to the other end of the trapezoidal connecting strip 2, while controlling the sealing welding torch 68. 8. By performing the operation, a sealing weld can be achieved between the trapezoidal connecting strip 2 and the lower substrate 1. Similarly, a sealing weld can be achieved between the lower substrate 1 and the four trapezoidal connecting strips 2. After sealing welding between the lower substrate 1 and the four trapezoidal connecting strips 2, the cover plate is placed between the opposite sides of the four trapezoidal connecting strips 2, and the upper substrate 3 is placed on the four trapezoidal connecting strips 2. Through the cooperation of the drive rod 52 and the two electromagnetic sliders 54, the sliding plate 51 and the two positioning blocks 53 are made to abut against the upper substrate 3, thereby positioning the upper substrate 3. Through the cooperation of the motor 652, the electric cylinder 612 and the electric cylinder 632, the sealing welding gun 68 is made to contact the trapezoidal connecting strips 2 and the lower substrate 1. The connecting strips 2 and the upper substrate 3 are joined together, and the base plate 61 is slid on the base 9 by the electromagnetic slider 62. With the cooperation of the motor 433, the upper substrate 3 and the four trapezoidal connecting strips 2 can be sealed and welded. After welding, the composite blank is positioned by the positioning component 5. The bearing plate 41 is rotated on the two uprights 92 by the electric cylinder 44, so that the composite blank is vertical. Then, the hinge shaft 651 is rotated by the motor 652, so that the mounting block 65 is rotated. With the cooperation of the electric cylinders 612 and 632, the submerged arc welding gun 69 is positioned directly above the opposite side between the lower substrate 1 and the upper substrate 3, close to the trapezoidal connecting strips. 2. Control the submerged arc welding gun 69 to work. The electromagnetic slider 62 makes the base plate 61 slide on the base 9. With the cooperation of the motor 433, submerged arc welding can be performed between the lower base plate 1 and the upper base plate 3. After the submerged arc welding is completed, the electric cylinder 44 makes the bearing plate 41 rotate and reset on the two uprights 92. The motor 652 drives the hinge shaft 651 to rotate, making the mounting block 65 rotate, so that the drill bit 73 is facing the trapezoidal connecting strip 2. The motor 74 is controlled to make the drill bit 73 rotate on the connecting plate 72. The two electric push rods 71 ​​are controlled to make the connecting plate 72 move closer to the trapezoidal connecting strip 2, thus achieving the effect of opening a hole in the trapezoidal connecting strip 2. The operation is simple.

[0076] When evacuating the composite billet, the motor 433 is controlled to rotate the turntable 42, so that the side of the composite billet with the evacuation hole 21 faces the sliding plate 51. The sliding block 82 slides in the groove 511, so that the vent pipe 83 faces the evacuation hole 21. The drive rod 52 moves the sliding plate 51 closer to the circular hole 411 on the support plate 41, so that the vent pipe 83 comes into contact with the composite billet. The vent pipe 83 is connected to the evacuation hole 21. The negative pressure pump 81 is then controlled to work, thus evacuating the air from the composite billet. Air is drawn outward through the vent pipe 83, corrugated hose 2 86, connecting pipe 84, and corrugated hose 1 85, achieving a vacuum effect inside the composite billet. By setting a sleeve plate 831 and a tension spring 832, the vent pipe 83 moves horizontally through the sliding block 82. One end of the vent pipe 83 near the circular hole 411 can be inserted into the extraction hole 21. When vacuuming the composite billet, the vent pipe 83 contacts the inner wall of the extraction hole 21, facilitating the extraction of air from the composite billet. Rotating the drive rod 52 causes the sliding plate 51 to move closer to the circular hole 411 on the bearing plate 41. When the sliding plate 51 is in contact with the lower substrate 1, and the vent pipe 83 is in contact with the composite blank, the vent pipe 83 slides away from the composite blank on the sliding plate 51, causing the tension spring 832 to deform. This does not affect the positioning of the composite blank by the sliding plate 51 in contact with the lower substrate 1. The system incorporates a negative pressure hole 422, a rotating joint 423, a negative pressure pipe 424, a connecting pipe 425, and a solenoid valve 841. With a special design, during the welding process of this composite billet, after the lower substrate 1 is placed on top of the support plate 41 and located on the turntable 42, the control solenoid valve 841 is closed. At this time, the control negative pressure pump 81 is activated, which can extract the air from the negative pressure hole 422 through the connecting pipe 425, the rotating joint 423 and the negative pressure pipe 424, thereby creating a negative pressure between the lower substrate 1 and the support plate 41, achieving a negative pressure positioning effect between the lower substrate 1 and the support plate 41, and improving the positioning effect of this composite billet.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding method for a trapezoidal vertical strip composite billet, characterized in that: The trapezoidal strip composite blank includes a lower substrate with a rectangular cross-section. Trapezoidal connecting strips are sealed and welded to the edges of the top four sides of the lower substrate. A cover plate is placed on the top of the lower substrate and between the opposite sides of the four trapezoidal connecting strips. An upper substrate is sealed and welded to the top of the four trapezoidal connecting strips. The lower substrate and the upper substrate are welded and fixed together by submerged arc welding. An air extraction hole is opened on the opposite side of the lower substrate and the upper substrate, penetrating one of the trapezoidal connecting strips. The welding method includes the following steps: S1: Place the lower substrate: Place the lower substrate on the welding equipment, which includes a support component, a positioning component, a welding component, an opening component, and an air extraction component. The lower substrate is placed on the support component, wherein the welding component is equipped with a sealing welding gun and a submerged arc welding gun. S2: Positioning the lower substrate: Positioning the lower substrate placed on the support component using the positioning component; S3: Place and position the trapezoidal connecting strip: Place the trapezoidal connecting strip at one edge of the top of the lower substrate, and position the trapezoidal connecting strip using the positioning component so that the side wall of the trapezoidal connecting strip is on the same vertical plane as the side wall of the lower substrate. Then, rotate the lower substrate horizontally using the bearing component, and place the other three trapezoidal connecting strips in sequence, and position the trapezoidal connecting strips using the positioning component. S4: Seal welding is performed between the four trapezoidal connecting strips and the lower substrate in sequence: the sealing welding gun of the welding assembly is used to seal the connection between the trapezoidal connecting strips and the lower substrate, and the lower substrate is rotated horizontally by the bearing assembly. Seal welding is performed between the four trapezoidal connecting strips and the lower substrate in sequence, and a cover plate is placed between the four trapezoidal connecting strips. S5: Place the upper substrate: Place the upper substrate on the four trapezoidal connecting strips and position the upper substrate using the positioning components; S6: Seal welding between the upper substrate and the four trapezoidal connecting strips: Seal welding between the trapezoidal connecting strips and the upper substrate is performed by the sealing welding gun of the welding assembly, and the lower substrate is horizontally rotated by the bearing assembly to seal welding between the four trapezoidal connecting strips and the upper substrate in sequence. S7: Submerged arc welding: The lower and upper substrates are fixed by submerged arc welding using the submerged arc welding gun of the welding assembly. S8: Opening: An air extraction hole is opened on the opposite side of the lower substrate and the upper substrate through one of the trapezoidal connecting bars by means of an opening assembly; S9: Vacuuming: Connect the vacuuming component to the vacuuming hole, and vacuum the cavity between the lower substrate, the four trapezoidal connecting strips and the upper substrate through the vacuuming component. The welding equipment also includes a base, the support component is mounted on the base, the positioning component is mounted on the support component, the welding component is mounted on the base and located on one side of the support component, the opening component is mounted on the welding component, and the air extraction component is mounted on the base. The bearing assembly includes a bearing plate hinged to two uprights. A circular hole is provided at the top of the bearing plate. A through hole is provided on the bearing plate and on the inner bottom wall of the circular hole. A turntable is rotatably installed in the circular hole. A rotating shaft is fixed at the bottom of the turntable and moves through the through hole. A driving component for driving the rotating shaft to rotate is installed on the bearing plate. The air extraction assembly includes a negative pressure pump fixedly installed on the base, a sliding block slidably installed horizontally in the groove and on the opposite side of the two positioning blocks, a horizontal air pipe installed on the sliding block, and a connecting pipe fixedly installed at the bottom of the support plate. One end of the connecting pipe is connected to the air inlet of the negative pressure pump through a corrugated hose one, and the other end is connected to the air pipe through a corrugated hose two. The vent tube moves horizontally through the sliding block. The end of the vent tube near the round hole can be inserted into the air extraction hole and abuts against the inner wall of the air extraction hole. A sleeve plate is fixed on the outer wall of the vent tube and on the side of the sliding block away from the round hole. A tension spring is fixedly installed between the sleeve plate and the opposite side of the sliding block and sleeved on the outside of the vent tube. The turntable has vertically oriented negative pressure holes symmetrically opened on both sides of the rotating shaft. A rotating joint is coaxially fixed to the outside of the rotating shaft. Two negative pressure pipes connected to the negative pressure holes are fixedly installed at one end of the rotating joint, and a connecting pipe is fixed at the other end. A solenoid valve is installed on the connecting pipe, and the connecting pipe is connected to the solenoid valve on the side away from the second corrugated hose.

2. The welding method for a trapezoidal vertical strip composite billet according to claim 1, characterized in that: The base is symmetrically fixed with support rods on its top, and uprights are symmetrically fixed on the top of the base and on one side of the two support rods; an electric cylinder is hinged to the base and hinged to the bearing plate, and the positioning assembly is mounted on the bearing plate.

3. The welding method for a trapezoidal vertical strip composite billet according to claim 2, characterized in that: The driving component includes a rotating rod rotatably mounted on the bottom of the support plate. One end of the rotating rod is connected to a rotating shaft via a bevel gear assembly. An electric motor for driving the rotating rod to rotate is fixedly mounted on the bottom of the support plate.

4. The welding method for a trapezoidal vertical strip composite billet according to claim 3, characterized in that: The positioning assembly includes a sliding plate slidably mounted on the top of a support plate along the direction of a circular hole. A drive rod threadedly connected to the sliding plate is rotatably mounted on the support plate. A horizontal through slot is provided on the sliding plate. Two positioning blocks are slidably mounted horizontally on the sliding plate and within the through slot. An electromagnetic slider I connected to the positioning blocks is mounted on the sliding plate. One end of the positioning block extends to the side of the sliding plate near the circular hole. A movable plate is slidably mounted on the top of the positioning block along the direction of the sliding plate. Limit plates are fixed on the sides of the two movable plates that are close to each other. A vertical electric push rod II is fixed on the limit plate. An extension plate is fixed at the bottom of the electric push rod II. An electromagnetic slider II connected to the movable plate is fixedly mounted on the positioning block.

5. The welding method for a trapezoidal vertical strip composite billet according to claim 4, characterized in that: The welding assembly includes a base plate that slides horizontally onto the top of the base. The base plate is located on the side of the upright away from the support rod. An electromagnetic slider three connected to the base plate is fixedly installed on the base. Two vertical telescopic rods one are fixedly installed on the top of the base plate. A fixing block is fixed to the top of the two telescopic rods one. An electric cylinder two connected to the fixing block is fixedly installed on the top of the base plate. Horizontally oriented telescopic rods two are symmetrically fixed on the fixing block. A bracket is fixedly installed at the telescopic end of the two telescopic rods two. An electric cylinder three connected to the bracket is fixedly installed on the fixing block. An installation block is hinged to the bracket via a hinge shaft. A motor one connected to the hinge shaft is fixedly installed on the installation block. A connecting plate one is fixedly installed on the side of the installation block near the bearing plate. A connecting plate two is fixedly installed at the bottom of the installation block. A sealing welding torch is fixedly installed on the connecting plate two. A submerged arc welding torch is fixedly installed on the connecting plate one. The opening assembly is installed at the bottom of the installation block.

6. The welding method for a trapezoidal vertical strip composite billet according to claim 5, characterized in that: The hole-opening assembly includes two electric actuators symmetrically fixedly installed at the bottom of the mounting block and on one side of the connecting plate 2. The piston rods of the two electric actuators 1 are fixed to the connecting plate 3. A vertically oriented drill bit is rotatably installed on the connecting plate 3. A motor 2 for driving the drill bit to rotate is fixedly installed on the connecting plate 3.

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