A vehicle frame production line for a car lift and a vehicle frame mounting method thereof

Abstract

The present application relates to the technical field of frame welding, in particular to a frame production line for automobile crane and a frame mounting method thereof, which comprises a plurality of positioning welding stations, and is characterized in that the frame box, the supporting leg, the frame front axle, various accessories and the walking platform are respectively welded in the corresponding stations, so as to complete the production and manufacturing of the whole frame; the frame box is accurately limited by the middle centering mechanism and the intermediate positioning mechanism, and the supporting leg is installed on the front and rear sides of the frame box by cooperating with the lifting positioning mechanism and the end centering mechanism, so as to realize the assembly and welding of the frame semi-finished product; the frame semi-finished product and the frame front axle are respectively accurately positioned and installed on the supporting table and the placing table of the frame front and rear positioning welding stations, so as to realize the assembly and welding of the whole frame body; and various accessories and the walking platform are spot-welded and spliced at the specified position of the frame, and the required shape size parameters are detected by three-dimensional scanning in the frame detection area, so as to greatly improve the intelligent production and manufacturing of the whole line.

Description

Technical Field

[0001] This invention relates to the field of vehicle frame welding technology, and more specifically, to a vehicle frame production line for truck cranes and a method for installing the vehicle frame thereon. Background Technology

[0002] Currently, crane frames are mostly manufactured using manual welding, which requires multiple flipping operations using cranes, resulting in low production efficiency and high labor intensity. Therefore, automating production using intelligent welding production lines can effectively reduce labor intensity and improve production efficiency. However, existing frame production lines lack complete management systems, leading to disorganization and safety issues during actual use, potentially causing accidents. Furthermore, adaptable transfer and adjustment are difficult when processing or transporting large or heavy frame components, significantly reducing production efficiency. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a chassis production line for truck cranes and a chassis installation method thereof, so as to solve the technical problem of low level of intelligence in chassis production lines.

[0004] The present invention adopts the following solution:

[0005] This application provides a chassis production line for a truck crane, including a chassis housing positioning welding station, a support leg and chassis housing positioning welding station, a front and rear chassis section positioning welding station, a chassis accessory positioning welding station, a platform plate positioning welding station, and an end inspection station. The chassis housing positioning welding station is used to assemble and weld incoming materials at the beginning of the production line to form a chassis housing, and further transfer the chassis housing to the next process. The support leg and chassis housing positioning welding station includes an end alignment mechanism, a lifting and positioning mechanism, a middle alignment mechanism, and an intermediate positioning mechanism. The middle alignment mechanism includes a lifting assembly, a roller assembly, and alignment assemblies facing each other along the width direction. The intermediate positioning mechanism is configured to perform pin positioning on the middle part of the chassis housing. The lifting and positioning mechanism and the end alignment mechanism cooperate to suit the assembly and installation of the support legs on the front and rear sides of the chassis housing. The front and rear chassis section positioning welding station includes a... The system includes a support platform for receiving fully welded semi-finished vehicle frames, and an assembly platform positioned in front of the support platform. The semi-finished vehicle frames are hoisted and placed on the support platform. The assembly platform is adapted to lift and limit the hoisted front axle of the vehicle frame, and precisely position and install the front axle onto the front side of the semi-finished vehicle frame. The vehicle frame accessory positioning welding station is configured to move the cab bracket, boom bracket, thrust rod bracket, engine bracket, and gearbox bracket to designated positions on the vehicle frame for spot welding. The platform positioning welding station is equipped with a positioning platform and guide rails and sliding platforms on both sides of the positioning platform. The positioning platform is used to lift and limit the hoisted vehicle frame. The sliding platform is equipped with magnetic suction components for gripping the platform and freely moving and docking it to the left and right sides of the vehicle frame. The final acceptance station has at least one vehicle frame inspection area, which uses a non-contact 3D scanner to perform operational inspection on the moved vehicle frame.

[0006] As a further improvement, the end centering mechanism is configured as a vertical centering clamping structure that can move freely relative to the length of the frame housing. The lifting and positioning mechanism is used to lift the placed outrigger to be flush with the frame housing placed by the intermediate positioning mechanism. The vertical centering clamping structure at least abuts the outrigger against the front and rear sides of the frame housing along the length direction and moves the outrigger to the center position along the width direction.

[0007] As a further improvement, the support platform includes a central pin structure for inserting and positioning the frame housing, a centering structure opposite to the front and rear sides of the central pin structure, and a leveling and lifting structure disposed on the front and rear sides of the support platform.

[0008] As a further improvement, the intermediate pin structure is used to axially limit the semi-finished frame that has been hoisted, the centering structure is suitable for centering and limiting the semi-finished frame in its width direction, and the leveling and lifting structure limits and levels the semi-finished frame in a horizontal state at its ends.

[0009] As a further improvement, the assembly platform includes a clamping structure for positioning and clamping the hoisted front axle of the vehicle frame, a movable frame slidably configured on the front side, and positioning posts and positioning guides mounted on the movable frame for locking and fixing the bumper of the front axle.

[0010] As a further improvement, the clamping structure includes a positioning pin for the front axle of the chassis, a lifting member, and a clamping member. The clamping member clamps the front axle of the chassis horizontally on the assembly platform in a centered clamping manner. The positioning pin is inserted into the left and right sides of the front axle of the chassis. The lifting member is vertically and height-adjustable on the assembly platform and adapted to support the front axle of the chassis.

[0011] As a further improvement, multiple positioning pins are spaced apart on the upper side of the movable frame for initial vertical positioning; the positioning guide rod is controlled by a hand-cranked screw to be inserted and positioned laterally under the linkage of the hand-cranked screw, so that the front axle bumper is locked on the movable frame, and the clamping structure can slide with the movable frame to connect the front axle of the frame to the semi-finished frame.

[0012] As a further improvement, the frame accessory positioning welding station includes a frame placement platform, a gantry crane mounted on the placement platform, and a traveling lifting platform for feeding materials onto the placement platform for use by the frame. The gantry crane is used to lift suspension brackets with accompanying tooling onto the frame. The traveling lifting platform is equipped with positioning templates, through which the cab bracket, boom bracket, engine bracket, and gearbox bracket are respectively transported onto the frame for further assembly and spot welding.

[0013] As a further improvement, the frame housing positioning welding station, the outrigger and frame housing positioning welding station, the front and rear frame positioning welding station, the frame accessory positioning welding station, and the walkway positioning welding station are each equipped with their own welding robot or manual welding station.

[0014] As a further improvement, the chassis inspection area is equipped with at least a loading and barcode scanning station, a station changeover and movement station, a scanning station, a data inspection station, and a material unloading and output station.

[0015] This application also provides a method for mounting a truck crane frame, based on the aforementioned truck crane frame production line, comprising the following steps:

[0016] S1: The frame housing is formed by manually assembling, repairing and reworking the internal welding of the frame housing, as well as single-wire external welding, double-wire external welding, repair flaw detection and processing through the corresponding positioning welding station of the frame housing.

[0017] S2: At the corresponding positioning welding station of the outrigger and the frame housing, install the outrigger assembly on the front and rear sides of the frame housing. At the corresponding positioning welding station of the front and rear sections of the frame, install the front axle of the frame on the front side of the semi-finished frame.

[0018] S3: Further move the frame accessories and walkway to the designated position on the frame for spot welding and splicing, and conduct three-dimensional scanning inspection and acceptance of the frame in the frame inspection area.

[0019] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0020] The chassis production line for truck cranes disclosed in this application, through the collaborative operation of multiple locating welding stations, sequentially welds the chassis housing, outriggers, front axle, various accessories, and walkways at their respective stations to complete the overall manufacturing of the chassis. At the outrigger and chassis housing locating welding station, a central alignment mechanism and an intermediate positioning mechanism precisely define the chassis housing. In conjunction with a lifting positioning mechanism and an end alignment mechanism, the outriggers are assembled and installed on the front and rear sides of the chassis housing, achieving the assembly welding of the semi-finished chassis. At the support platforms and placement platforms at the front and rear locating welding stations, the semi-finished chassis and the front axle are precisely positioned and installed, achieving the assembly welding of the entire chassis frame. Various accessories and walkways are spot-welded to designated positions on the chassis. The chassis inspection area performs 3D scanning to detect the required external dimensions, significantly improving the intelligent manufacturing of the entire line.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0023] Figure 1 This is a schematic diagram of the chassis production line for a truck crane according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a vehicle frame for a truck crane according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the support leg and frame housing positioning welding station of the chassis production line for truck cranes according to an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 A structural diagram from another perspective;

[0027] Figure 5This is a schematic diagram of the front and rear frame positioning welding stations of a vehicle frame production line for a truck crane according to an embodiment of the present invention.

[0028] Figure 6 yes Figure 5 A schematic diagram of the support platform in the diagram;

[0029] Figure 7 yes Figure 5 A schematic diagram of the fixture structure for the assembly table;

[0030] Figure 8 yes Figure 5 A schematic diagram of the structure of the mobile frame;

[0031] Figure 9 This is a structural schematic diagram of the frame accessory positioning welding station in a frame production line for a truck crane according to an embodiment of the present invention;

[0032] Figure 10 yes Figure 9 A schematic diagram of the structure of the traveling lifting platform in the middle;

[0033] Figure 11 This is a schematic diagram of the structure of the positioning welding station of the walkway plate in the chassis production line for truck cranes according to an embodiment of the present invention;

[0034] Figure 12 This is a flowchart of the method for installing the chassis of a truck crane according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures

[0036] 1-Frame housing positioning welding station; 2-Outrigger and frame housing positioning welding station; 3-Front and rear frame positioning welding station; 4-Frame accessory positioning welding station; 5-Walkway plate positioning welding station; 6-End inspection station;

[0037] 7-End centering mechanism; 8-Lifting and positioning mechanism; 9-Middle centering mechanism; 10-Intermediate positioning mechanism; 11-Lifting assembly; 12-Roller assembly; 13-Centering assembly; 36-Lifting component; 37-Switching block;

[0038] 14-Support platform; 15-Assembly platform; 16-Intermediate pin structure; 17-Centering structure; 18-Leveling and lifting structure; 19-Clamping structure; 20-Moving frame; 21-Positioning column; 22-Positioning guide rod; 23-Positioning pin; 24-Lifting component; 25-Clamping component; 26-Hand crank screw;

[0039] 27-Placement platform; 28-Gantry crane; 29-Traveling lifting platform; 30-Positioning template; 35-Engine and gearbox bracket tooling;

[0040] 31-Positioning stage; 32-Guide rail; 33-Sliding stage; 34-Magnetic suction component;

[0041] A - Chassis housing; B - Outriggers; C - Front axle chassis; D - Cab support; E - Crane support; F - Engine support; G - Gearbox support; H - Suspension support; J - Walkway; K - Thrust rod support. Detailed Implementation

[0042] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0043] The terminology of a chassis production line for a truck crane and a chassis mounting method thereof, according to this application, is described below with reference to the accompanying drawings.

[0044] Combination Figures 1 to 11 This embodiment provides a chassis production line for truck cranes, including a chassis housing positioning welding station 1, a support leg and chassis housing positioning welding station 2, a chassis front and rear section positioning welding station 3, a chassis accessory positioning welding station 4, a platform plate positioning welding station 5, and an end-of-line inspection station 6.

[0045] The frame housing positioning welding station 1 is used to assemble and weld the incoming materials from the beginning of the production line to form the frame housing A, and then transfer the frame housing to the next process. It should be noted that the frame housing positioning welding station 1 is an existing station design and will not be described in detail here. Obviously, the frame housing A output from the frame housing positioning welding station 1 can be directly used by the next process.

[0046] The outrigger and frame housing positioning welding station 2 includes an end alignment mechanism 7, a lifting and positioning mechanism 8, a middle alignment mechanism 9, and an intermediate positioning mechanism 10. The middle alignment mechanism 9 includes a lifting assembly 11, a roller assembly 12, and alignment assemblies 13 facing each other along the width direction. The intermediate positioning mechanism 10 is configured to perform pin positioning on the middle part of the frame housing A. The lifting and positioning mechanism 8 and the end alignment mechanism 7 cooperate to suit the installation of the outrigger B assembly on the front and rear sides of the frame housing A.

[0047] The frame front and rear section positioning welding station 3 includes a support platform 14 for receiving the fully welded frame semi-finished product, and an assembly platform 15 set in front of the support platform 14. The frame semi-finished product is hoisted and placed on the support platform 14. The assembly platform 15 is adapted to lift and limit the hoisted frame front axle C, and accurately position and install the frame front axle C to the front side of the frame semi-finished product.

[0048] The frame accessory locating welding station 4 is configured to move the cab bracket D, boom bracket E, thrust rod bracket K, engine bracket F, and gearbox bracket G to designated positions on the frame for spot welding. It should be noted that the specific configuration of the frame accessory locating welding station 4 can be further described below.

[0049] Among them, such as Figure 11 As shown, the platform positioning welding station 5 is equipped with a positioning platform 31 and guide rails 32 and sliding platforms 33 arranged on both sides of the positioning platform 31. The positioning platform 31 is used to support and limit the vehicle frame that has been hoisted. The sliding platform 33 is equipped with a magnetic suction component 34, which is used to grab the platform and move and dock it freely to the left and right sides of the vehicle frame.

[0050] The end-of-line acceptance station 6 has at least one frame inspection area, which uses a non-contact 3D scanner to perform operational inspections on the transferred frame.

[0051] The aforementioned truck crane frame production line, through the collaborative efforts of multiple locating welding stations, sequentially welds the frame housing A, outriggers B, front axle C, various accessories, and walkway J at their respective stations, completing the overall manufacturing of the frame. At the outrigger and frame housing locating welding station 2, the frame housing A is precisely defined by the central alignment mechanism 9 and the intermediate positioning mechanism 10. With the assistance of the lifting positioning mechanism 8 and the end alignment mechanism 7, the outriggers B are assembled and installed on the front and rear sides of the frame housing A, achieving the assembly welding of the semi-finished frame. At the support platform 14 and placement platform 27 of the front and rear frame locating welding stations 3, the semi-finished frame and the front axle C are precisely positioned and installed, achieving the assembly welding of the entire frame. Various accessories and walkway J are spot-welded to designated positions on the frame. The frame inspection area performs 3D scanning to detect the required external dimensions, greatly improving the intelligent manufacturing of the entire line.

[0052] like Figure 3 and Figure 4As shown, in this embodiment, the end centering mechanism 7 is configured as a vertical centering clamping structure that can move freely relative to the length of the frame housing A. The lifting and positioning mechanism 8 is used to lift the placed support leg B to be flush with the frame housing A placed by the intermediate positioning mechanism 10. The vertical centering clamping structure at least abuts the support leg B against the front and rear sides of the frame housing A along the length direction and moves the support leg B to a centered position along the width direction. Obviously, the vertical centering clamping structure can use an existing centering clamping device, which, after centering and clamping, adjusts the support leg B on the lifting and positioning mechanism 8 to a centered position to facilitate further welding of the support leg B to the front and rear sides of the frame housing A. The lifting and positioning mechanism 8 adopts a lifting platform structure, which can at least move the support leg B in the vertical direction to cooperate with the frame housing A.

[0053] Furthermore, the flange ring of the frame housing is precision machined at the frame housing positioning welding station 1 (e.g., milling flange holes). Then, a manual gantry crane is used to lift the outriggers to the frame housing positioning welding station 2. A cantilevered turning machine flips the frame housing, and the roller assembly 12 is raised above the support bar of the intermediate positioning mechanism 10 to prevent damage to the precision-machined flange. After the frame housing is placed on the roller assembly 12, the centering assembly 13 centers the frame and performs initial positioning in the width direction. The roller assembly 12 is manually rolled for secondary positioning in the length direction. At the same time, the central centering mechanism 9 is lowered, and the pin holes on the frame housing flange ring are aligned with the positioning pins of the intermediate positioning mechanism 10. After the front and rear lifting assemblies 11 are moved to both ends of the frame, the outriggers are placed on top of them, and the vertical centering clamping mechanism clamps and centers the outriggers. Due to different frame models, the position and height of the outriggers and the frame housing are different, and the lifting and positioning mechanisms 8 located on the front and rear sides are equipped with lifting components 36 and switching blocks 37 (e.g., Figure 4 As shown in the figure, the switching block is detachable and its function is to adjust the height. The lifting block 36 can move up and down and its function is to lift the workpiece, so as to adapt to different models of vehicle frame housings. Finally, manual spot welding is performed for positioning.

[0054] like Figures 5 to 8 As shown, in this embodiment, the support platform 14 includes a central pin structure 16 for inserting and positioning the frame housing A, a centering structure 17 positioned on the front and rear sides of the central pin structure 16, and a leveling and lifting structure 18 disposed on the front and rear sides of the support platform 14. Specifically, the central pin structure 16 is used to axially limit the semi-finished frame that has been hoisted, the centering structure 17 is adapted to center and limit the semi-finished frame in its width direction, and the leveling and lifting structure 18 limits and levels the ends of the semi-finished frame in a horizontal state. Thus, through axial positioning, centering and limiting, and lifting and adjustment, the semi-finished frame is accurately positioned at the required location. The centering structure 17 is similar to the centering clamping device described above and will not be described in detail.

[0055] In this embodiment, the assembly platform 15 includes a clamping structure 19 for positioning and clamping the hoisted front axle C, a movable frame 20 slidably disposed on the front side, and positioning posts 21 and positioning guide rods 22 disposed on the movable frame 20 for locking and fixing the front axle bumper. The clamping structure 19 includes positioning pins 23, lifting members 24, and clamping members 25 (similar to a centering clamping device) for the front axle. The clamping members 25 clamp the front axle horizontally on the assembly platform 15 in a centering clamping manner. The positioning pins 23 are inserted into the left and right sides of the front axle. The lifting members 24 are vertically configurable on the assembly platform 15 and adapted to support the front axle C. Multiple positioning posts 21 are spaced apart on the upper side of the movable frame 20 for initial vertical positioning. The positioning guide rod 22 is controlled by the hand-cranked screw 26, so that it is correspondingly inserted and positioned in the lateral direction under the linkage of the hand-cranked screw 26, so that the front axle bumper is locked on the movable frame 20, and the clamping structure 19 can slide with the movable frame 20 to connect the front axle C of the frame to the semi-finished frame.

[0056] In the above process, after the semi-finished frame is precisely positioned and placed by the support platform 14, the assembly platform 15 adjusts and moves the front axle C of the frame to be matched and joined to the semi-finished frame until the front axle C of the frame is precisely assembled to the front side of the semi-finished frame.

[0057] like Figure 9 and Figure 10 As shown, in this embodiment, the frame accessory positioning welding station 4 includes a frame placement platform 27, a gantry crane 28 mounted on the placement platform 27, and a traveling lifting platform 29 for feeding materials onto the placement platform 27 for use on the frame. The gantry crane 28 is used to lift the suspension bracket H with accompanying tooling onto the frame. The traveling lifting platform 29 is equipped with a positioning template 30, which is used to transport the cab bracket D, boom bracket E, engine bracket F, and gearbox bracket G onto the frame for further assembly and spot welding. The gantry crane 28 is used to position the accompanying tooling of the suspension bracket H, thereby achieving the positioning and welding of multiple sets of suspension brackets H and thrust rod brackets K. The traveling lifting platform 29 installs the cab bracket D and boom bracket E into designated positions for manual spot welding assembly. The positioning template 30 on the traveling lifting platform 29 can be replaced according to the frame specifications to meet the spot welding installation requirements of various models of cab brackets. The engine and transmission bracket fixture 35 is used to install the engine bracket template and the transmission bracket template respectively. The template is moved to the designated position and raised and lowered. Then, the engine bracket F and the transmission bracket G are manually spot welded and assembled.

[0058] It should be mentioned that the frame housing positioning welding station 1, the outrigger and frame housing positioning welding station 2, the front and rear frame section positioning welding station 3, the frame accessory positioning welding station 4, and the walkway plate positioning welding station 5 are each equipped with their own welding robot (not shown in the figure) or manual welding station. Thus, each positioning welding station is equipped with an independent welding robot, or the initial fixing welding can be performed manually by spot welding, followed by a final unified full welding.

[0059] In this embodiment, the chassis inspection area is equipped with at least a loading and scanning station, an AGV changing station, a scanning station, a data inspection station, and a material unloading station. Specifically, automated inspection of the crane chassis is performed using non-contact 3D scanning to check contour accuracy, dimensional accuracy, geometric tolerances, and assembly component errors. The system can automatically display and output graphical representations of the measurement results and analysis reports. The specific process flow is as follows: loading and scanning, AGV changing station movement, manual scanning, data inspection, material unloading, data inspection, and report output.

[0060] Combination Figure 12 This embodiment also provides a method for mounting a truck crane frame, based on the aforementioned truck crane frame production line, including the following steps:

[0061] S1: The frame housing is formed by manually assembling, repairing and reworking the internal welding of the frame housing, as well as single-wire external welding, double-wire external welding, repair flaw detection and processing through the corresponding positioning welding station of the frame housing.

[0062] S2: At the corresponding positioning welding station of the outrigger and the frame housing, install the outrigger assembly on the front and rear sides of the frame housing. At the corresponding positioning welding station of the front and rear sections of the frame, install the front axle of the frame on the front side of the semi-finished frame.

[0063] S3: Further move the frame accessories and walkway to the designated position on the frame for spot welding and splicing, and conduct three-dimensional scanning inspection and acceptance of the frame in the frame inspection area.

[0064] The above-mentioned method for installing the truck crane frame involves at least the following steps: frame housing positioning welding (manual assembly) → frame housing internal welding (robotic welding) → internal welding repair and rework of the housing → frame housing cover plate and reinforcing rib positioning welding → frame housing external welding (single wire) → frame housing cover plate internal welding (manual) → frame housing external welding (double wire) → frame housing external welding rework → aging and flaw detection → frame housing machining → outrigger and frame housing positioning welding → outrigger and frame housing connection weld welding → front and rear frame positioning welding → front and rear frame butt weld welding → frame robot laser marking → frame accessory positioning welding → frame accessory final welding → platform plate positioning welding → platform plate bracket welding → inspection area, storage and coding area. This achieves automated and intelligent manufacturing of the entire truck crane frame.

[0065] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A chassis production line for truck cranes, characterized in that, This includes the frame housing positioning welding station (1), the outrigger and frame housing positioning welding station (2), the front and rear frame positioning welding station (3), the frame accessory positioning welding station (4), the walkway plate positioning welding station (5), and the end-of-line inspection station (6); among them, The frame housing positioning welding station (1) is used to assemble and weld the incoming materials at the beginning of the production line to form the frame housing (A), and further transfer the frame housing (A) to the next process. The outrigger and frame housing positioning welding station (2) includes an end centering mechanism (7), a lifting and positioning mechanism (8), a middle centering mechanism (9), and an intermediate positioning mechanism (10); the middle centering mechanism (9) includes a lifting assembly (11), a roller assembly (12), and centering assemblies (13) that are opposite each other in the width direction; the intermediate positioning mechanism (10) is configured to perform pin positioning on the middle part of the frame housing (A), and the lifting and positioning mechanism (8) and the end centering mechanism (7) cooperate to be adapted to assemble and install the outrigger (B) on the front and rear sides of the frame housing (A); The front and rear section positioning welding station (3) of the frame includes a support platform (14) for receiving the semi-finished frame after full welding, and an assembly platform (15) set in front of the support platform (14). The semi-finished frame is hoisted and placed on the support platform (14). The assembly platform (15) is adapted to lift and limit the hoisted front axle (C) of the frame, and accurately position and install the front axle (C) of the frame to the front side of the semi-finished frame. The frame accessory positioning welding station (4) is configured to move the cab bracket (D), boom bracket (E), thrust rod bracket (K), engine bracket (F), and gearbox bracket (G) to designated positions on the frame for spot welding. The platform positioning welding station (5) is equipped with a positioning platform (31) and guide rails (32) and sliding platforms (33) arranged on both sides of the positioning platform (31). The positioning platform (31) is used to support and limit the vehicle frame that has been hoisted. The sliding platform (33) is equipped with magnetic suction components (34). The magnetic suction components (34) are used to grab the platform (J) and freely move and dock it to the left and right sides of the vehicle frame; and, The end-of-line acceptance station (6) has at least one frame inspection area, which uses a non-contact 3D scanner to perform operational inspection on the transferred frame.

2. The chassis production line for truck cranes according to claim 1, characterized in that, The end centering mechanism (7) is configured as a vertical centering clamping structure that can move freely relative to the length direction of the frame housing (A). The lifting and positioning mechanism (8) is used to lift the placed support leg (B) to be flush with the frame housing (A) placed by the intermediate positioning mechanism (10). The vertical centering clamping structure at least abuts the support leg (B) against the front and rear sides of the frame housing (A) along the length direction and moves the support leg (B) to the center position along the width direction.

3. The chassis production line for truck cranes according to claim 1, characterized in that, The support platform (14) includes a central pin structure (16) for inserting and positioning the frame housing (A), a centering structure (17) opposite to the front and rear sides of the central pin structure (16), and a leveling and lifting structure (18) arranged on the front and rear sides of the support platform (14).

4. The chassis production line for truck cranes according to claim 3, characterized in that, The intermediate pin structure (16) is used to axially limit the semi-finished frame that has been hoisted, the centering structure (17) is suitable for centering and limiting the semi-finished frame in its width direction, and the leveling and lifting structure (18) limits and levels the semi-finished frame in a horizontal state at the end.

5. The chassis production line for truck cranes according to claim 1, characterized in that, The assembly platform (15) includes a clamping structure (19) for positioning and clamping the hoisted front axle (C), a sliding frame (20) slidably disposed on the front side, and positioning posts (21) and positioning guide rods (22) provided on the sliding frame (20) for locking and fixing the bumper of the front axle.

6. The chassis production line for truck cranes according to claim 5, characterized in that, The clamping structure (19) includes a positioning pin (23), a lifting member (24), and a clamping member (25) for the front axle (C) of the chassis. The clamping member (25) clamps the front axle (C) of the chassis horizontally on the assembly platform (15) in a centered clamping manner. The positioning pin (23) is inserted into the left and right sides of the front axle (C) of the chassis. The lifting member (24) is vertically and vertically configured on the assembly platform (15) and is adapted to support the front axle (C) of the chassis.

7. The chassis production line for truck cranes according to claim 6, characterized in that, Multiple positioning posts (21) are spaced apart on the upper side of the movable frame (20) for initial vertical positioning; the positioning guide rod (22) is controlled by the hand-cranked screw (26) to be inserted and positioned in the lateral direction under the linkage of the hand-cranked screw (26), so that the front axle bumper is locked on the movable frame (20), and the clamping structure (19) can slide with the movable frame (20) to connect the front axle (C) of the frame to the semi-finished frame.

8. The chassis production line for truck cranes according to claim 1, characterized in that, The frame accessory positioning welding station (4) includes a frame placement platform (27), a gantry crane (28) configured on the placement platform (27), and a traveling lifting platform (29) for feeding materials to the placement platform (27) for use on the frame. The gantry crane (28) is used to lift the suspension bracket (H) with accompanying tooling onto the frame. The traveling lifting platform (29) is provided with a positioning template (30). The positioning template (30) is used to transport the cab bracket (D), boom bracket (E), engine bracket (F), and gearbox bracket (G) onto the frame for further assembly and spot welding.

9. The chassis production line for truck cranes according to claim 1, characterized in that, The chassis inspection area is equipped with at least a loading and barcode scanning station, a station changeover station, a scanning station, a data inspection station, and a material unloading and output station.

10. A method for mounting the chassis of a truck crane, characterized in that, The chassis production line for truck cranes as described in any one of claims 1 to 9 includes the following steps: The frame housing (A) is formed by manually assembling, internal welding repair, single-wire external welding, double-wire external welding, repair flaw detection and processing of the frame housing (A) through the frame housing positioning welding station (1). At the outrigger and frame housing positioning welding station (2), the outrigger (B) is assembled and installed on the front and rear sides of the frame housing (A). At the front and rear section positioning welding station (3), the front axle (C) of the frame is installed on the front side of the frame semi-finished product. The frame accessories and walkway (J) are then moved to the designated position on the frame for spot welding and splicing. The frame is then subjected to three-dimensional scanning inspection and acceptance in the frame inspection area.

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