Welding assembly system and method for portal frame structure of stacking machine

Abstract

The invention belongs to the technical field of stacking machine gantry production, and particularly relates to a welding assembly system and method for a stacking machine gantry frame structure. The automatic welding device is mainly composed of a controller, a stiffening beam adsorption assembly, a connecting component clamping assembly, an axial anti-disengaging piece pushing assembly, a stand column pipe fitting pushing assembly, a screw hitting mechanical arm, an outer linear seam welding assembly, an outer annular seam welding assembly and an inner annular seam welding assembly. The automatic welding and assembling of the portal frame structure of the stacking machine can be realized; according to the stacking machine portal frame structure assembled in a welded mode, the circumferential torsion resistance between the adjacent stand column pipe fittings is improved through the connecting components, the axial anti-disengaging performance between the connecting components and the stand column pipe fittings is improved through the axial anti-disengaging parts, and the stand column pipe fittings arranged side by side on the two sides serve as sliding rail parts for linear sliding of a follow-up movable portal. After multiple sections are spliced, complex bending and torsion combined stress can be borne, and the reliability meets the requirement of a high-strength working condition.

Description

Technical Field

[0001] This invention belongs to the field of forklift gantry manufacturing technology, specifically relating to a welding assembly system and method for forklift gantry frame structures. Background Technology

[0002] The gantry frame structure of a forklift, as the core load-bearing component supporting the entire gantry system, directly affects the safety performance and service life of the equipment. Traditional gantry frame structures, due to their large overall height, typically require multiple sections longitudinally joined by welding. This manufacturing method presents significant technical bottlenecks in practical applications. First, the heat-affected zone generated during welding alters the microstructure of the base material, creating weak points in the weld area. Second, under alternating loads, stress concentration easily occurs at the weld joints of the multi-section spliced ​​structure, potentially leading to microcracks that gradually propagate over long-term operation. Third, the straightness and parallelism of the uprights in the frame structure are significantly affected by welding deformation; improper process control can lead to a decrease in the accuracy of the gantry track fit. Existing welded gantry frame structures exhibit poor fatigue resistance. When the forklift performs frequent lifting operations, the welded areas are subjected to complex bending and torsional stresses, making it difficult to meet the reliability requirements of high-intensity working conditions. Especially under low-temperature environments or dynamic impact loads, welding defects are more likely to cause structural failure, posing a potential risk to the safety of warehousing and logistics operations.

[0003] To address this, our company has designed a multi-segment composite gantry frame structure. After being assembled from multiple segments, this structure can withstand complex bending and torsional stresses, and its reliability meets the requirements of high-intensity working conditions. Existing technologies lack a welding system capable of meeting the welding and assembly requirements of the aforementioned multi-segment composite gantry frame structure. Therefore, the inventors aim to provide a welding and assembly system and method for forklift gantry frame structures. Summary of the Invention

[0004] The purpose of this invention is to overcome the aforementioned problems in the prior art and to provide a welding assembly system and method for forklift gantry frame structures.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: This invention provides a welding and assembly system for a forklift gantry frame structure, including a controller and connected to it a reinforcing beam adsorption assembly, a connecting member clamping assembly, an axial anti-detachment pushing assembly, a column pipe pushing assembly, a screw-driving robot, an outer straight seam welding assembly, an outer circumferential seam welding assembly, and an inner circumferential seam welding assembly. The reinforcing beam adsorption assembly supports and adsorbs an I-shaped reinforcing beam; the connecting member clamping assembly clamps and holds connecting members that are snap-fitted onto both sides of the I-shaped reinforcing beam; the axial anti-detachment pushing assembly can install axial anti-detachment components on both sides of the connecting members; and the column pipe pushing assembly can... The system allows for the installation of column fittings on the outside of the connecting components and axial anti-detachment components. The screw-driving robot can install fastening screws between the I-beam reinforcing beam, connecting components, axial anti-detachment components, and column fittings. The outer straight seam welding assembly can weld the outer straight seam between the I-beam reinforcing beam, connecting components, and column fittings. The outer annular seam welding assembly can weld the outer annular seam between the connecting components and column fittings. The inner annular seam welding assembly can weld the first inner annular seam between the connecting components and column fittings, as well as the second inner annular seam between the axial anti-detachment components and column fittings.

[0006] Furthermore, in the above-mentioned welding assembly system, the I-shaped reinforcing beam includes a horizontal plate portion, a vertical plate portion, and a reinforcing rib plate. The horizontal plate portion is symmetrically provided with vertical plate portions on both sides, and the horizontal plate portion and the vertical plate portion are symmetrically provided with reinforcing rib plates. The vertical plate portion is symmetrically provided with two sets of first fastening holes that cooperate with fastening screws. The connecting member includes a middle tube and axial protrusions on both sides thereof. A first recess is provided on one side of the middle tube. The outer diameter of the axial protrusions is smaller than the outer diameter of the middle tube. A second recess is provided on one side of the axial protrusions to match the position of the first recess. Multiple locking grooves are provided on the axial protrusions along the circumference. A second fastening hole is provided on the inner end plate of the second recess to match the fastening screw. The axial anti-loosening component includes an annular plate, a third recess, an axial protrusion, and a locking hook. One side of the annular plate is provided with a third recess that mates with the position of the second recess. Multiple axial protrusions are fixed circumferentially on the outer side of the annular plate. The outer end of the axial protrusion is equipped with a locking hook that can be engaged in the locking groove. The outer side of the locking hook is provided with a guide slope. The inner end plate of the third recess is provided with a third fastening hole that mates with a fastening screw. The column fitting includes an outer tube and a fourth recess on one side thereof. The specifications of the outer tube are compatible with those of the middle tube. The fourth recess can be fitted onto the outer fourth recess of the second / third recess. The inner end plate of the fourth recess has a fourth fastening hole that matches the position of the second fastening hole and a fifth fastening hole that matches the position of the third fastening hole.

[0007] Furthermore, in the above welding assembly system, the reinforcing beam adsorption assembly includes a first base plate, a first push rod, and a suction cup. The cylinder of the first push rod is fixed on the first base plate, and the movable end of the first push rod is equipped with a suction cup for adsorbing the horizontal plate portion of the I-shaped reinforcing beam.

[0008] Furthermore, in the above welding assembly system, the connecting component clamping assembly includes a second base plate, a second push rod, a first lead screw driver, a first carrier plate, and a first arc-shaped clamping plate. The cylinder of the second push rod is fixed on the second base plate. The movable end of the second push rod is equipped with two first carrier plates that can move in opposite directions via the first lead screw driver. The inner side of the first carrier plate is equipped with a first arc-shaped clamping plate for clamping the intermediate tube on the connecting component.

[0009] Furthermore, in the aforementioned welding assembly system, the axial anti-detachment component pushing assembly includes a third base plate, a third push rod, a carrier frame, a snap-fit ​​drive push rod, a carrier block, and a locking push rod. The cylinder of the third push rod is fixed on the third base plate, and the movable end of the third push rod is equipped with a carrier frame. The cylinder of the snap-fit ​​drive push rod is fixed on the carrier frame, and the movable end of the snap-fit ​​drive push rod is equipped with a carrier block for loading the axial anti-detachment component. The inner side of the carrier block is provided with a guide rod that penetrates the carrier frame, and the outer side of the carrier block is provided with a snap block that mates with the inner cavity of the annular plate. The bottom end of the carrier block is equipped with a locking push rod that can extend into the third fastening hole.

[0010] Furthermore, in the above welding assembly system, the column pipe pushing assembly includes a fourth base plate, a first linear guide pair, a fourth push rod, a second screw driver, a second carrier plate, and a second arc-shaped clamping plate. The slide rail of the first linear guide pair is fixed on the fourth base plate, and the slider of the first linear guide pair is equipped with the fourth push rod. The movable end of the fourth push rod is equipped with two second carrier plates that can move in opposite directions via the second screw driver. The inner side of the second carrier plate is equipped with a second arc-shaped clamping plate for clamping the outer tube of the column pipe fitting.

[0011] Furthermore, in the above welding assembly system, the external straight seam welding assembly includes a fifth base plate, a fifth push rod, a third carrier plate, a second linear guide pair, and a first welding head. The cylinder of the fifth push rod is fixed on the fifth base plate, the movable end of the fifth push rod is equipped with the third carrier plate, the slide rail of the second linear guide pair is fixed on the third carrier plate, and the slider of the second linear guide pair is equipped with the first welding head.

[0012] Furthermore, in the above-mentioned welding assembly system, the outer annular seam welding assembly includes a sixth base plate, a sixth push rod, a third lead screw driver, a fourth carrier plate, an arc-shaped slide rail, an arc-shaped slider, and a second welding head. The cylinder of the sixth push rod is fixed on the sixth base plate. The movable end of the sixth push rod is equipped with two fourth carrier plates that can move in opposite directions via the third lead screw driver. An arc-shaped slide rail is installed on the inner side of the fourth carrier plate. The two arc-shaped slide rails are joined together to form a circular slide rail. An arc-shaped slider that forms an arc-shaped guide rail pair with the arc-shaped slide rail is installed on one of the arc-shaped slide rails. A second welding head is installed on the outer side of the arc-shaped slider.

[0013] Furthermore, in the aforementioned welding assembly system, the inner annular seam welding assembly includes a seventh base plate, a seventh push rod, a first support seat, a torsion sleeve, a first tilting motor, a steering gear set, a third linear guide pair, a second tilting motor, a second support seat, an electromagnetic clutch, a hollow long shaft, an adjustment mechanism, and a third welding head. The cylinder of the seventh push rod is fixed on the seventh base plate. The movable end of the seventh push rod is equipped with a torsion sleeve and a first tilting motor via the first support seat. The output shaft of the first tilting motor drives the torsion sleeve to rotate via the steering gear set. The upper side of the slider of the third linear guide pair is equipped with a second tilting motor and a second support seat. An electromagnetic clutch is installed inside the second support seat. The output shaft of the second tilting motor is connected to one end of the hollow long shaft via the electromagnetic clutch. The other end of the hollow long shaft is equipped with a third welding head via the adjustment mechanism. The hollow long shaft passes through the torsion sleeve and is bonded to it.

[0014] This embodiment also provides a welding assembly method for a portal frame structure, including the following steps: S1. The reinforcing beam adsorption assembly is used to support the adsorption I-shaped reinforcing beam. The connecting component clamping assembly is used to clamp the connecting component and make it snap-fitted onto both sides of the I-shaped reinforcing beam. The axial anti-detachment push assembly is used to install axial anti-detachment components on both sides of the connecting component. The column pipe push assembly is used to install column pipes on the outside of the connecting component and the axial anti-detachment components. The screw-driving robot is used to install fastening screws between the I-shaped reinforcing beam, the connecting component, the axial anti-detachment components, and the column pipes. S2. Use external straight seam welding components to weld the external straight seams between the I-beam reinforcing beam, connecting components, and column fittings; S3. Use an outer annular seam welding assembly to weld the outer annular seam between the connecting components and the column fittings. S4. The inner annular seam welding assembly can be used to weld the first inner annular seam between the connecting components and the column fittings, as well as the second inner annular seam between the axial anti-detachment component and the column fittings.

[0015] The beneficial effects of this invention are: 1. This invention provides a welding and assembly system for a forklift gantry frame structure, which mainly consists of a controller, a reinforcing beam adsorption assembly, a connecting component clamping assembly, an axial anti-detachment component pushing assembly, a column pipe component pushing assembly, a screw-driving robot, an outer straight seam welding assembly, an outer annular seam welding assembly, and an inner annular seam welding assembly. These components work together to pre-assemble the I-beam reinforcing beam, connecting component clamping assembly, axial anti-detachment component pushing assembly, column pipe component pushing assembly, and screw-driving robot, using these components. Then, the outer straight seam welding assembly welds the outer straight seam between the I-beam reinforcing beam, connecting component, and column pipe component; the outer annular seam welding assembly welds the outer annular seam between the connecting component and column pipe component; and the inner annular seam welding assembly welds the first inner annular seam between the connecting component and column pipe component, as well as the second inner annular seam between the axial anti-detachment component and column pipe component. This method enables automated welding and assembly of the forklift gantry frame structure.

[0016] 2. The welded and assembled forklift gantry frame structure of this invention mainly consists of I-beam reinforcing beams, connecting components, axial anti-detachment components, column pipes, and fastening screws. The connecting components are used to improve the circumferential torsional resistance between adjacent column pipes, and the axial anti-detachment components are used to improve the axial anti-detachment resistance between the connecting components and column pipes. The column pipes on both sides are used as slide rail components for the linear sliding of the subsequent movable gantry. In addition, its multi-segment splicing can withstand complex bending and torsional composite stresses, and its reliability meets the requirements of high-intensity working conditions.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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.

[0019] Figure 1 This is a connection block diagram of the main electrical components in this invention; Figure 2 This is an exploded view of the forklift gantry frame structure in this invention; Figure 3 This is a three-dimensional schematic diagram of the forklift gantry frame structure in this invention; Figure 4 This is a half-sectional schematic diagram of the forklift gantry frame structure in this invention; Figure 5This is a schematic diagram of the I-beam reinforcing beam in this invention; Figure 6 This is a schematic diagram of the connecting component in this invention; Figure 7 This is a half-sectional schematic diagram of the connecting component in this invention; Figure 8 This is a schematic diagram of the axial anti-detachment component in the present invention; Figure 9 This is a half-sectional schematic diagram of the column fitting in this invention; Figure 10 This is a schematic diagram of the pile foundation positioning aeration component in this invention; Figure 11 This is a schematic diagram of the structure of the reinforcing beam adsorption assembly in this invention; Figure 12 This is a schematic diagram of the structure of the connecting component clamping assembly in this invention; Figure 13 This is a schematic diagram of the axial anti-detachment component pushing assembly in this invention; Figure 14 This is a schematic diagram of the structure of the column pipe pushing assembly in this invention; Figure 15 This is a schematic diagram of the structure of the external straight seam welding assembly in this invention; Figure 16 This is a schematic diagram of the structure of the outer annular seam welding assembly in this invention; Figure 17 This is a schematic diagram of the structure of the inner annular seam welding assembly in this invention; Figure 18 This is a schematic diagram of the tilting mechanism in this invention; The attached diagram lists the components represented by each number as follows: 1-Controller; 2-Reinforcing beam adsorption assembly, 201-First substrate, 202-First push rod, 203-Suction cup; 3-Connecting component clamping assembly, 301-Second base plate, 302-Second push rod, 303-First lead screw driver, 304-First carrier plate, 305-First arc-shaped clamping plate; 4-Axial anti-detachment component push assembly, 401-Third base plate, 402-Third push rod, 403-Carrier frame, 404-Snap-on drive push rod, 405-Carrier block, 406-Locking push rod; 5-Column pipe pushing assembly, 501-Fourth base plate, 502-First linear guide pair, 503-Fourth push rod, 504-Second lead screw driver, 505-Second carrier plate, 506-Second arc-shaped clamping plate; 6-Screw-driving robotic arm; 7-External straight seam welding assembly, 701-Fifth substrate, 702-Fifth push rod, 703-Third carrier plate, 704-Second linear guide pair, 705-First welding head; 8-Outer annular seam welding assembly, 801-Sixth substrate, 802-Sixth push rod, 803-Third lead screw driver, 804-Fourth carrier plate, 805-Arc-shaped slide rail, 806-Arc-shaped slider, 807-Second welding head; 9-Inner annular seam welding assembly, 901-Seventh base plate, 902-Seventh push rod, 903-First support seat, 904-Torsion sleeve, 905-First tilting motor, 906-Steering gear set, 907-Third linear guide pair, 908-Second tilting motor, 909-Second support seat, 910-Electromagnetic clutch, 911-Hollow long shaft, 912-Tilt adjustment mechanism, 913-Third welding head, 912a-First connecting plate, 912b-Second connecting plate, 912c-Ear plate, 912d-Tilt adjustment push rod, 912e-First ear seat, 912f-Second ear seat; 10-I-shaped reinforcing beam, 101-transverse plate, 102-longitudinal plate, 103-reinforcing rib, 104-first fastening hole; 11-Connecting component, 111-Intermediate tube, 112-First recess, 113-Axial protrusion, 114-Second recess, 115-Locking groove, 116-Second fastening hole; 12-Axial anti-detachment component, 121-Annular plate, 122-Third recess, 123-Axial protrusion, 124-Locking hook, 125-Guide slope, 126-Third fastening hole; 13-Column fitting, 131-Outer tube, 132-Fourth recess, 133-Fourth fastening hole, 134-Fifth fastening hole; 14-Fastening screws; 15-Outer straight seam; 16-Outer circumferential seam; 17-First inner annular seam; 18 - Second inner annular seam. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0021] like Figures 1-4As shown, this embodiment provides a welding assembly system for a forklift gantry frame structure, including a controller 1 and connected to it a reinforcing beam adsorption assembly 2, a connecting member clamping assembly 3, an axial anti-detachment pushing assembly 4, a column pipe pushing assembly 5, a screw-driving robot 6, an outer straight seam welding assembly 7, an outer annular seam welding assembly 8, and an inner annular seam welding assembly 9. The reinforcing beam adsorption assembly 2 can support and adsorb the I-shaped reinforcing beam 10, the connecting member clamping assembly 3 can clamp and hold the connecting members 11 that are snapped onto both sides of the I-shaped reinforcing beam 10, the axial anti-detachment pushing assembly 4 can install axial anti-detachment parts 12 on both sides of the connecting members 11, and the column pipe pushing assembly 5 can install axial anti-detachment parts 12 on both sides of the connecting members 11. A column fitting 13 is added to the outside of the axial anti-detachment component 12. The screw-driving robot 6 can install fastening screws 14 between the I-shaped reinforcing beam 10, the connecting component 11, the axial anti-detachment component 12, and the column fitting 13. The outer straight seam welding assembly 7 can weld the outer straight seam 15 between the I-shaped reinforcing beam 10, the connecting component 11, and the column fitting 13. The outer annular seam welding assembly 8 can weld the outer annular seam 16 between the connecting component 11 and the column fitting 13. The inner annular seam welding assembly 9 can weld the first inner annular seam 17 between the connecting component 11 and the column fitting 13, and the second inner annular seam 18 between the axial anti-detachment component 12 and the column fitting 13.

[0022] like Figure 5 As shown, the I-shaped reinforcing beam 10 includes a horizontal plate portion 101, a vertical plate portion 102, and a reinforcing rib plate 103. The vertical plate portion 102 is symmetrically arranged on both sides of the horizontal plate portion 101, and the reinforcing rib plate 103 is symmetrically arranged between the horizontal plate portion 101 and the vertical plate portion 102. The vertical plate portion 102 is symmetrically provided with two sets of first fastening holes 104 that cooperate with the fastening screws 14.

[0023] like Figures 6-7 As shown, the connecting member 11 includes a central tube 111 and axial protrusions 113 located on both sides thereon. One side of the central tube 111 is provided with a first recess 112 that can be engaged with the outer side of the longitudinal plate portion 102. The outer diameter of the axial protrusion 113 is smaller than the outer diameter of the central tube 111. One side of the axial protrusion 113 is provided with a second recess 114 that matches the position of the first recess 112. The axial protrusion 113 is provided with a plurality of locking grooves 115 along the circumferential direction. The inner end plate of the second recess 114 is provided with a second fastening hole 116 that matches the fastening screw 14.

[0024] like Figure 8As shown, the axial anti-detachment component 12 includes an annular plate 121, a third recess 122, an axial protrusion 123, and a locking hook 124. One side of the annular plate 121 is provided with a third recess 122 that mates with the position of the second recess 114. Multiple axial protrusions 123 are fixed circumferentially on the outer side of the annular plate 121. The outer end of the axial protrusion 123 is equipped with a locking hook 124 that can be inserted into the locking groove 115. The outer side of the locking hook 124 is provided with a guide slope 125. The inner end plate of the third recess 122 is provided with a third fastening hole 126 that mates with the fastening screw 14.

[0025] like Figures 9-10 As shown, the column fitting 13 includes an outer tube 131 and a fourth recess 132 on one side thereof. The specifications of the outer tube 131 are compatible with the specifications of the intermediate tube 111. The fourth recess 132 can be fitted onto the outer side of the second recess 114 / third recess 122. The inner end plate of the fourth recess 132 has a fourth fastening hole 133 that matches the position of the second fastening hole 116 and a fifth fastening hole 134 that matches the position of the third fastening hole 126.

[0026] like Figure 11 As shown, the reinforcing beam adsorption assembly 2 includes a first base plate 201, a first push rod 202 and a suction cup 203. The cylinder of the first push rod 202 is fixed on the first base plate 201, and the movable end of the first push rod 202 is equipped with a suction cup 203 for adsorbing the horizontal plate portion 101 in the I-shaped reinforcing beam 10.

[0027] The working principle of the reinforcing beam adsorption assembly 2: Using vacuum adsorption or electromagnetic adsorption technology, the suction cup covers the surface of the I-shaped reinforcing beam 10, and the beam is fixed by negative pressure or magnetic force to ensure that it does not shift during assembly.

[0028] like Figure 12 As shown, the connecting member clamping assembly 3 includes a second base plate 301, a second push rod 302, a first lead screw driver 303, a first carrier plate 304, and a first arc-shaped clamping plate 305. The cylinder of the second push rod 302 is fixed on the second base plate 301. The movable end of the second push rod 302 is equipped with two first carrier plates 304 that can move in opposite directions via the first lead screw driver 303. The inner side of the first carrier plate 304 is equipped with a first arc-shaped clamping plate 305 for clamping the connecting member 11 and its intermediate tube 111.

[0029] The working principle of the connecting component clamping assembly 3 is as follows: the second push rod 302 drives the first lead screw driver 303 to make horizontal displacement, and the first lead screw driver 303 drives the two first carrier plates 304 to make vertical relative displacement. After the two first carrier plates 304 approach each other, the connecting component 11 and its intermediate tube 111 can be reliably clamped by the first arc-shaped clamping plate 305.

[0030] like Figure 13As shown, the axial anti-detachment component pushing assembly 4 includes a third base plate 401, a third push rod 402, a carrier frame 403, a snap-fit ​​drive push rod 404, a carrier block 405, and a locking push rod 406. The cylinder of the third push rod 402 is fixed on the third base plate 401. The carrier frame 403 is installed on the movable end of the third push rod 402. The cylinder of the snap-fit ​​drive push rod 404 is fixed on the carrier frame 403. The carrier block 405 for loading the axial anti-detachment component 12 is installed on the movable end of the snap-fit ​​drive push rod 404. A guide rod 407 penetrating the carrier frame 403 is provided on the inner side of the carrier block 405. A snap block that cooperates with the inner cavity of the annular plate 121 is provided on the outer side of the carrier block 405. A locking push rod 406 that can extend into the third fastening hole 126 is installed at the bottom end of the carrier block 405.

[0031] The working principle of the axial anti-detachment push assembly 4 is as follows: the third push rod 402 is used to drive the frame 403 to move vertically, and the snap-fit ​​drive push rod 404 on the frame 403 drives the block 405 to move horizontally. The axial anti-detachment component 12 is loaded on the block 405 and locked by the locking push rod 406. The block 405 moves towards the connecting member 11 along with the snap-fit ​​drive push rod 404, so that the locking hook 124 of the axial anti-detachment component 12 can be snapped into the locking groove 115 of the connecting member 11.

[0032] like Figure 14 As shown, the column fitting push assembly 5 includes a fourth base plate 501, a first linear guide pair 502, a fourth push rod 503, a second lead screw driver 504, a second carrier plate 505, and a second arc-shaped clamping plate 506. The slide rail of the first linear guide pair 502 is fixed on the fourth base plate 501. The slider of the first linear guide pair 502 is equipped with the fourth push rod 503. The movable end of the fourth push rod 503 is equipped with two second carrier plates 505 that can move in opposite directions via the second lead screw driver 504. The inner side of the second carrier plate 505 is equipped with a second arc-shaped clamping plate 506 for clamping the outer tube 131 in the column fitting 13.

[0033] The working principle of the column pipe fitting pushing assembly 5 is as follows: the fourth push rod 503 drives the second lead screw driver 504 to perform horizontal displacement, the second lead screw driver 504 drives the two second carrier plates 505 to perform vertical relative displacement, and after the two second carrier plates 505 approach each other, the column pipe fitting 13 can be reliably clamped by the second arc-shaped clamping plate 506. The first linear guide pair 502 drives the clamped column pipe fitting 13 to perform axial displacement, so that its end is sleeved on the outside of the connecting member 11 and the axial anti-disengagement member 12.

[0034] like Figure 15As shown, the external straight seam welding assembly 7 includes a fifth base plate 701, a fifth push rod 702, a third carrier plate 703, a second linear guide pair 704, and a first welding head 705. The cylinder of the fifth push rod 702 is fixed on the fifth base plate 701, the movable end of the fifth push rod 702 is mounted on the third carrier plate 703, the slide rail of the second linear guide pair 704 is fixed on the third carrier plate 703, and the slider of the second linear guide pair 704 is mounted on the first welding head 705.

[0035] The working principle of the external straight seam welding assembly 7 is as follows: the fifth push rod 702 is used to adjust the vertical height of the first welding head 705, and the second linear guide pair 704 is used to drive the first welding head 705 to move horizontally, thereby meeting the requirements for welding the external straight seam 15 between the I-shaped reinforcing beam 10, the connecting component 11, and the column pipe fitting 13.

[0036] like Figure 16 As shown, the outer annular seam welding assembly 8 includes a sixth base plate 801, a sixth push rod 802, a third lead screw driver 803, a fourth carrier plate 804, an arc-shaped slide rail 805, an arc-shaped slider 806, and a second welding head 807. The cylinder of the sixth push rod 802 is fixed on the sixth base plate 801. The movable end of the sixth push rod 802 is equipped with two fourth carrier plates 804 that can move in opposite directions via the third lead screw driver 803. An arc-shaped slide rail 805 is installed on the inner side of the fourth carrier plate 804. The two arc-shaped slide rails 805 are joined together to form a circular slide rail. An arc-shaped slider 806 that forms an arc-shaped guide rail pair with one of the arc-shaped slide rails 805 is installed on it. The second welding head 807 is installed on the outer side of the arc-shaped slider 806.

[0037] The working principle of the outer annular seam welding assembly 8 is as follows: the sixth push rod 802 is used to adjust the position of the third lead screw driver 803. The third lead screw driver 803 drives the two arc-shaped slide rails 805 on it to approach each other and splice into a circular slide rail. The arc-shaped slider 806 is used to drive the second welding head 807 to move circumferentially, thereby meeting the requirements for welding the outer annular seam 16 between the connecting component 11 and the column pipe fitting 13.

[0038] like Figure 17As shown, the inner annular seam welding assembly 9 includes a seventh base plate 901, a seventh push rod 902, a first support seat 903, a torsion sleeve 904, a first tilting motor 905, a steering gear set 906, a third linear guide pair 907, a second tilting motor 908, a second support seat 909, an electromagnetic clutch 910, a hollow long shaft 911, a tilting mechanism 912, and a third welding head 913. The cylinder of the seventh push rod 902 is fixed on the seventh base plate 901, and the movable end of the seventh push rod 902 is mounted with a torsion sleeve via the first support seat 903. The sleeve 904 and the first tilting motor 905 are connected. The output shaft of the first tilting motor 905 drives the torsion sleeve 904 to rotate via a steering gear set 906. The upper side of the slider of the third linear guide pair 907 is equipped with a second tilting motor 908 and a second support seat 909. An electromagnetic clutch 910 is installed inside the second support seat 909. The output shaft of the second tilting motor 908 is connected to one end of the hollow long shaft 911 via the electromagnetic clutch 910. The other end of the hollow long shaft 911 is equipped with a third welding head 913 via a tilting mechanism 912. The hollow long shaft 911 passes through the torsion sleeve 904 and is keyed to it. A keyway is provided on the outer side of the hollow long shaft 911, and a convex key that mates with the keyway is provided on the inner wall of the torsion sleeve 904.

[0039] like Figure 18 As shown, the tilt adjustment mechanism 912 includes a first connecting plate 912a, a second connecting plate 912b, an ear plate 912c, a tilt adjustment push rod 912d, a first ear seat 912e, and a second ear seat 912f. One side of the first connecting plate 912a is fixed to the hollow long shaft 911. The other side of the first connecting plate 912a is equipped with the ear plate 912c and the tilt adjustment push rod 912d. The outer side of the second connecting plate 912b is equipped with a third welding head 913. The inner side of the second connecting plate 912b is equipped with the first ear seat 912e, which is rotatably connected to the ear plate 912c, and the second ear seat 912f, which is rotatably connected to the movable end of the tilt adjustment push rod 912d.

[0040] The working principle of the inner annular seam welding assembly 9 is as follows: the third linear guide pair 907 drives the third welding head 913 to move axially along the hollow long shaft 911, and the second flip motor 908 drives the hollow long shaft 911 to rotate circumferentially through the energized electromagnetic clutch 910 to reset the third welding head 913; during operation, the electromagnetic clutch 910 is de-energized, and the first flip motor 905 drives the torsion sleeve 904 to rotate through the steering gear set 906. The torsion sleeve 904 then drives the hollow long shaft 911 and the third welding head 913 to rotate, which meets the requirements for welding the first inner annular seam 17 between the connecting member 11 and the column fitting 13 and the second inner annular seam 18 between the axial anti-detachment member 12 and the column fitting 13.

[0041] This embodiment also provides a welding assembly method for a portal frame structure, including the following steps: S1. The reinforcing beam adsorption assembly 2 is used to support the adsorption I-shaped reinforcing beam 10. The connecting member clamping assembly 3 is used to clamp the connecting member 11 and make it snap-fitted onto both sides of the I-shaped reinforcing beam 10. The axial anti-detachment push assembly 4 is used to install axial anti-detachment parts 12 on both sides of the connecting member 11. The column pipe push assembly 5 is used to install column pipe 13 on the outside of the connecting member 11 and the axial anti-detachment parts 12. The screw-driving robot 6 is used to install fastening screws 14 between the I-shaped reinforcing beam 10, the connecting member 11, the axial anti-detachment parts 12, and the column pipe 13. S2. The outer straight seam 15 between the I-shaped reinforcing beam 10, the connecting component 11, and the column fitting 13 is welded using the outer straight seam welding assembly 7. S3. The outer annular seam 16 between the connecting member 11 and the column fitting 13 is welded using the outer annular seam welding assembly 8. S4. The inner annular seam welding assembly 9 can be used to weld the first inner annular seam 17 between the connecting member 11 and the column fitting 13, and the second inner annular seam 18 between the axial anti-detachment member 12 and the column fitting 13.

[0042] The welded and assembled forklift gantry frame structure in this embodiment mainly consists of I-beam reinforcing beams, connecting components, axial anti-detachment components, column fittings, and fastening screws. The connecting components are used to improve the circumferential torsional resistance between adjacent column fittings, and the axial anti-detachment components are used to improve the axial anti-detachment resistance between the connecting components and column fittings. The column fittings on both sides are used as slide rail components for the subsequent linear sliding of the movable gantry. In addition, its multi-segment splicing can withstand complex bending and torsional combined stresses, and its reliability meets the requirements of high-intensity working conditions.

[0043] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding assembly system for a mast frame structure of a reach stacker, characterized in that, The controller is connected with a reinforcing beam adsorption assembly, a connecting component clamping assembly, an axial anti-drop piece pushing assembly, a stand pipe pushing assembly, a screwing mechanical hand, an outer straight seam welding assembly, an outer ring seam welding assembly and an inner ring seam welding assembly.

2. The welding assembly system of claim 1, wherein, The I-shaped reinforcing beam comprises a horizontal plate part, a vertical plate part and a reinforcing rib plate. The connecting component comprises a middle pipe and axial convex pipes on both sides of the middle pipe. The axial anti-drop piece comprises an annular plate, a third recess, an axial convex plate and a lock hook. The stand pipe comprises an outer pipe and a fourth recess on one side of the outer pipe.

3. The welding assembly system of claim 2, wherein, The reinforcing beam adsorption assembly comprises a first base plate, a first push rod and a suction cup. The first push rod is fixed on the first base plate, and the movable end of the first push rod is provided with the suction cup for adsorbing the horizontal plate part of the I-shaped reinforcing beam.

4. The welding assembly system of claim 3, wherein, The connecting member clamping assembly comprises a second base plate, a second push rod, a first screw rod driver, a first carrier plate and a first arc-shaped clamping plate, the cylinder body of the second push rod is fixed on the second base plate, the movable end of the second push rod is provided with two first carrier plates capable of moving towards each other through the first screw rod driver, and the inner side of the first carrier plate is provided with the first arc-shaped clamping plate for clamping the connecting member and the middle pipe thereon.

5. The welding assembly system of claim 4, wherein, The axial anti-disengagement piece pushing assembly comprises a third base plate, a third push rod, a carrier frame, a clamping driving push rod, a carrier block and a locking push rod, the cylinder body of the third push rod is fixed on the third base plate, the movable end of the third push rod is provided with the carrier frame, the cylinder body of the clamping driving push rod is fixed on the carrier frame, the movable end of the clamping driving push rod is provided with the carrier block for loading the axial anti-disengagement piece, the inner side surface of the carrier block is provided with a guide rod penetrating through the carrier frame, the outer side surface of the carrier block is provided with a clamping block matched with the inner cavity of the annular plate, and the bottom end of the carrier block is provided with the locking push rod capable of extending into the third fastening hole.

6. The welding assembly system of claim 5, wherein, The column pipe pushing assembly comprises a fourth base plate, a first linear guide pair, a fourth push rod, a second screw rod driver, a second carrier plate and a second arc-shaped clamping plate, the slide rail of the first linear guide pair is fixed on the fourth base plate, the slide block of the first linear guide pair is provided with the fourth push rod, the movable end of the fourth push rod is provided with two second carrier plates capable of moving towards each other through the second screw rod driver, and the inner side of the second carrier plate is provided with the second arc-shaped clamping plate for clamping the outer and inner pipes of the column pipe.

7. The welding assembly system of claim 6, wherein, The outer linear seam welding assembly comprises a fifth base plate, a fifth push rod, a third carrier plate, a second linear guide pair and a first welding head, the cylinder body of the fifth push rod is fixed on the fifth base plate, the movable end of the fifth push rod is provided with the third carrier plate, the slide rail of the second linear guide pair is fixed on the third carrier plate, and the slide block of the second linear guide pair is provided with the first welding head.

8. The welding assembly system of claim 7, wherein, The outer annular seam welding assembly comprises a sixth base plate, a sixth push rod, a third screw rod driver, a fourth carrier plate, an arc-shaped slide rail, an arc-shaped slide block and a second welding head, the cylinder body of the sixth push rod is fixed on the sixth base plate, the movable end of the sixth push rod is provided with two fourth carrier plates capable of moving towards each other through the third screw rod driver, the inner side of the fourth carrier plate is provided with the arc-shaped slide rail, two arc-shaped slide rails are butted to form a circular slide rail, one of the arc-shaped slide rails is provided with the arc-shaped slide block matched with the arc-shaped slide rail to form an arc-shaped guide pair, and the outer side of the arc-shaped slide block is provided with the second welding head.

9. The welding assembly system of claim 8, wherein, The inner annular seam welding assembly comprises a seventh base plate, a seventh push rod, a first support seat, a torsion sleeve, a first overturning motor, a steering gear set, a third linear guide pair, a second overturning motor, a second support seat, an electromagnetic clutch, a hollow long shaft, a tilt adjusting mechanism and a third welding head, the cylinder body of the seventh push rod is fixed on the seventh base plate, the movable end of the seventh push rod is provided with the torsion sleeve and the first overturning motor through the first support seat, the output shaft of the first overturning motor drives the torsion sleeve to rotate through the steering gear set, the second overturning motor and the second support seat are mounted on the upper side of the slider of the third linear guide pair, the electromagnetic clutch is mounted in the second support seat, the output shaft of the second overturning motor is connected with one end of the hollow long shaft through the electromagnetic clutch, the other end of the hollow long shaft is provided with the third welding head through the tilt adjusting mechanism, and the hollow long shaft passes through the torsion sleeve and is mutually keyed therewith.

10. A method of welded assembly of a portal column, implemented on the basis of the welded assembly system according to claim 9, characterized in that, The method comprises the following steps: S1, supporting the adsorption I-shaped reinforced beam by using the reinforced beam adsorption assembly, clamping the connecting member and sleeving the connecting member on the two sides of the I-shaped reinforced beam by using the connecting member clamping assembly, pushing the axial anti-disengagement piece on the two sides of the connecting member by using the axial anti-disengagement piece pushing assembly, installing the stand pipe on the outer side of the connecting member and the axial anti-disengagement piece by using the stand pipe pushing assembly, and installing the fastening screw among the I-shaped reinforced beam, the connecting member, the axial anti-disengagement piece and the stand pipe by using the screw driving mechanical hand; S2, welding the outer straight seam among the I-shaped reinforced beam, the connecting member and the stand pipe by using the outer straight seam welding assembly; S3, welding the outer annular seam among the connecting member and the stand pipe by using the outer annular seam welding assembly; S4, welding the first inner annular seam among the connecting member and the stand pipe and the second inner annular seam among the axial anti-disengagement piece and the stand pipe by using the inner annular seam welding assembly.

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