Longitudinal beam welding device for semitrailer production and machining method of longitudinal beam welding device

Abstract

The invention relates to the technical field of semitrailer production, in particular to a longitudinal beam welding device for semitrailer production and a machining method of the longitudinal beam welding device. And the rotary supporting assembly is composed of symmetrically-arranged bearing rotary discs, annular roller paths rotationally matched with the annular guide rails are arranged on the outer side faces of the bearing rotary discs in a surrounding mode, and spaced bearings are evenly distributed in the annular roller paths in the circumferential direction. The horizontal worm drives the adjusting worm gear to rotate, so that the bearing turntable rotates along the annular guide rail. Due to the fact that the tool support stretches across the bearing rotary disc, the tool support can move along with rotation of the bearing rotary disc, multi-angle overturning of the longitudinal beam fixed to the tool support is achieved, welding operation at different positions is facilitated, rapid and controllable overturning of workpieces is achieved, dependence on crown blocks, forklifts and manual operation in the traditional welding process is reduced, and welding efficiency is improved. And the machining period of a single workpiece is obviously shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of semi-trailer production, and particularly to a longitudinal beam welding device for semi-trailer production and its processing method. Background Art

[0002] In the current semi-trailer production process, as the core component of the load-bearing structure, the welding quality of the longitudinal beam has a decisive impact on the safety and service life of the whole vehicle. The longitudinal beam usually adopts a box girder structure design with a length exceeding 12 meters and a weight of several tons, and multiple weld treatments such as flat welding, vertical welding and overhead welding are required to ensure its sufficient strength and stability. However, the existing tooling brackets for semi-trailer longitudinal beam welding have the problem of insufficient flexibility and cannot effectively support the multi-angle flipping requirements of the longitudinal beam.

[0003] Traditionally, when performing longitudinal beam welding operations, in order to adjust to the appropriate welding position, it often relies on the way of overhead crane lifting or forklift collaborative operation for flipping adjustment. Each longitudinal beam needs to be lifted and adjusted multiple times on average to complete all welding processes. This not only prolongs the processing cycle of a single workpiece, but also seriously affects the overall rhythm of the production line. Frequent use of overhead cranes and manual assistance for flipping operations may also cause problems such as damage to the surface of the longitudinal beam and a decrease in welding accuracy, further affecting product quality. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a longitudinal beam welding device for semi-trailer production and its processing method to solve the problem of low overall processing efficiency when performing longitudinal beam welding processing in semi-trailer production, which relies on the way of overhead crane lifting or forklift collaborative operation for flipping adjustment.

[0005] Based on the above purpose, the present invention provides a longitudinal beam welding device for semi-trailer production, including:

[0006] A base frame, with annular guide rails symmetrically arranged on the left and right sides above it;

[0007] A slewing bearing assembly, composed of symmetrically arranged bearing turntables. An annular raceway that rotates in cooperation with the annular guide rail is provided around the outer side of the bearing turntable, and equally spaced bearings are circumferentially distributed inside the annular raceway;

[0008] An adjusting worm gear, fixedly arranged on the outside of the bearing turntable. The horizontal worm is horizontally arranged in the middle of the base frame through a bearing seat. The horizontal worm meshes with the adjusting worm gear for transmission, and one end of it is connected to an adjusting motor;

[0009] A tooling bracket, horizontally bridging between the symmetrically arranged bearing turntables to form a rigid support structure for fixing the longitudinal beam;

[0010] By adjusting the motor to drive the horizontal worm to drive the adjusting worm wheel to rotate, the bearing turntable makes a rotary motion along the annular guide rail, and then drives the tooling bracket and the longitudinal beam fixed thereon to realize multi-angle flipping.

[0011] Furthermore, it also includes an angle positioning component, and the angle positioning component includes an annular scale disk, and the annular scale disk is fixed on the outside of the bearing turntable, and the angle values are uniformly calibrated along the circumferential direction.

[0012] Furthermore, the angle positioning component also includes:

[0013] A rotating gear ring, coaxially fixed on the outside of the annular scale disk, and rotates synchronously with the annular scale disk and the bearing turntable;

[0014] A linkage gear, meshed on the outside of the rotating gear ring, and a rotary encoder is arranged at the shaft end thereof through a coupling;

[0015] The rotary encoder is electrically connected to the adjusting motor to form a closed-loop feedback control system;

[0016] When the bearing turntable rotates, the rotating gear ring drives the linkage gear to rotate, and the rotating angle data is detected and fed back to the adjusting motor in real time through the rotary encoder, so as to realize the precise positioning and quantitative adjustment of the flipping angle of the longitudinal beam.

[0017] Furthermore, it also includes a clamping and fixing component, which includes:

[0018] A clamping and fixing disk, coaxially fixedly connected to the bearing turntable, and rotates synchronously with it;

[0019] Clamping calipers, fixed on the base frame, and a fitting clamping groove matching the outer edge shape of the clamping and fixing disk is arranged on the inner side thereof;

[0020] When the bearing turntable drives the tooling bracket to drive the longitudinal beam to rotate to the target angle, the clamping and fixing disk applies a radial clamping force through the clamping calipers, locks the rotational freedom of the clamping and fixing disk and the bearing turntable, and further fixes the welding position and posture of the longitudinal beam.

[0021] Furthermore, hydraulic cylinders are symmetrically arranged on the inner side of the fitting clamping groove, a hydraulic piston is slidably fitted in the hydraulic cylinder, the outer end of the hydraulic piston is fixedly connected with a friction clamping piece, the middle part of the friction clamping piece is elastically connected with the hydraulic cylinder through a return spring, and a hydraulic pump is arranged at the outer end of the hydraulic cylinder;

[0022] When pressure oil is injected into the hydraulic cylinder through the hydraulic pump, it drives the hydraulic piston to drive the friction clamping piece to radially press the clamping and fixing disk, and locks the bearing turntable through friction. When the hydraulic cylinder relieves pressure through the hydraulic pump, the return spring pulls the friction clamping piece to reset and releases the clamping lock on the clamping and fixing disk.

[0023] Furthermore, a lifting guide frame is vertically arranged at the center of the base frame. An auxiliary support platform is arranged inside the lifting guide frame. The auxiliary support platform is slidably connected with the lifting guide frame. A plurality of freely rotatable guide rollers are evenly distributed along the transverse direction at the top thereof, and a hydraulic telescopic rod is connected and arranged at the bottom;

[0024] The fixed end of the hydraulic telescopic rod is fixedly connected with the lifting guide frame, and its telescopic end drives the auxiliary support platform to vertically lift along the lifting guide frame;

[0025] When the hydraulic telescopic rod extends, the auxiliary support platform rises below the tooling bracket, and the longitudinal beam is supported by the guide rollers and assisted to be translated to the clamping station of the tooling bracket;

[0026] After the longitudinal beam is welded, the hydraulic telescopic rod contracts to drive the auxiliary support platform to descend, so that the longitudinal beam is separated from the tooling bracket and the unloading is completed.

[0027] Furthermore, the bottom of the lifting guide frame is slidably connected with the base frame through a translation guide rail, and the translation guide rail is arranged perpendicular to the extending direction of the tooling bracket;

[0028] A translation rack is fixed in the middle of the translation guide rail. The translation rack meshes with a translation gear. The shaft end of the translation gear is connected with a translation motor, and the translation motor is fixed at the bottom of the lifting guide frame;

[0029] The translation motor drives the translation gear to roll along the translation rack, driving the whole lifting guide frame, auxiliary support platform and longitudinal beam to move horizontally along the translation guide rail, so that the auxiliary support platform moves out from directly below the tooling bracket to the outer loading and unloading area, realizing the rapid positioning and unloading of the longitudinal beam.

[0030] A longitudinal beam welding and processing method for semi-trailer production includes the following steps:

[0031] S1 Longitudinal beam clamping and positioning: Place the longitudinal beam on the guide rollers, and raise the auxiliary support platform through the hydraulic telescopic rod of the lifting guide frame;

[0032] Start the translation motor, and drive the lifting guide frame to move along the translation guide rail to directly below the tooling bracket;

[0033] Drive the auxiliary support platform to rise through the hydraulic telescopic rod, so that the longitudinal beam falls into the clamping station of the tooling bracket, and the longitudinal beam is clamped and fixed by the tooling bracket;

[0034] S2 Dynamic angle adjustment: Drive the horizontal worm by the adjustment motor to drive the adjustment worm wheel to rotate, so that the bearing turntable rotates along the annular guide rail. At the same time, the angle data is real-time fed back through the rotary encoder, and the closed-loop correction is carried out until the preset angle, and then the clamping caliper is hydraulically locked to eliminate the influence of the worm and worm wheel transmission clearance on the pose;

[0035] S3 Welding Process: According to the angle of the longitudinal beam, the longitudinal beam is welded by a welding torch. When welding in segments, after each area is completed, the clamping caliper is released, the bearing turntable is driven to rotate to the next target angle and then re-locked, and then the welding continues to complete the welding process of the longitudinal beam.

[0036] Advantages of the present invention: As can be seen from the above, a longitudinal beam welding device for semi-trailer production provided by the present invention drives the adjusting worm gear to rotate through a horizontal worm, and then the bearing turntable makes a rotary motion along the annular guide rail. Since the tooling bracket spans between the bearing turntables, it will move as the bearing turntable rotates, thus realizing the multi-angle flipping of the longitudinal beam fixed on it, facilitating welding operations at different positions, realizing the rapid and controllable flipping of the workpiece, reducing the dependence on overhead cranes, forklifts and manual operations in the traditional welding process, and significantly shortening the processing cycle of a single workpiece. Brief Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a front structural schematic diagram of an embodiment of the present invention;

[0039] Figure 2 It is a back structural schematic diagram of an embodiment of the present invention;

[0040] Figure 3 It is a structural schematic diagram of the auxiliary support platform of an embodiment of the present invention;

[0041] Figure 4 It is a structural schematic diagram of the base frame of an embodiment of the present invention;

[0042] Figure 5 It is a structural schematic diagram of the angle positioning component of an embodiment of the present invention;

[0043] Figure 6 It is a structural schematic diagram of the clamping and fixing component of an embodiment of the present invention;

[0044] Figure 7 It is a structural schematic diagram of the slewing support component of an embodiment of the present invention;

[0045] Figure 8 It is a structural schematic diagram of the clamping caliper of an embodiment of the present invention.

[0046] The labels in the figure are:

[0047] 1. Base frame; 101. Mounting base; 102. Ring guide rail; 103. Horizontal worm; 104. Adjusting motor; 105. Translation guide rail; 106. Translation rack; 2. Slewing support assembly; 201. Load-bearing turntable; 202. Ring raceway; 203. Spacer bearing; 204. Adjusting worm gear; 3. Angle positioning assembly; 301. Ring scale; 302. Rotating gear ring; 303. Linkage gear; 304. Rotary encoder; 4. Clamping and fixing assembly; 401. Clamping and fixing plate; 402. Clamping caliper; 403. Fitting clamping groove; 404. Hydraulic cylinder; 405. Hydraulic piston; 406. Friction clamping piece; 407. Return spring; 408. Hydraulic pump; 5. Tooling bracket; 6. Auxiliary support table; 601. Guide roller; 602. Lifting guide frame; 603. Hydraulic telescopic rod; 604. Translation gear; 605. Translation motor. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0049] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0050] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 As shown in

[0051] Base frame 1, with ring guide rails 102 symmetrically arranged on the left and right sides above it;

[0052] The slewing bearing assembly 2 is composed of symmetrically arranged load-bearing turntables 201. An annular raceway 202 that rotates in cooperation with the annular guide rail 102 is provided around the outer side surface of the load-bearing turntable 201, and circumferentially equally spaced bearings 203 are arranged inside the annular raceway 202;

[0053] The adjusting worm gear 204 is fixedly arranged on the outside of the load-bearing turntable 201. The horizontal worm 103 is horizontally arranged in the middle of the base frame 1 through a bearing seat. The horizontal worm 103 is in meshing transmission with the adjusting worm gear 204, and one end of it is connected to the adjusting motor 104;

[0054] The tooling support 5 is horizontally bridged between the symmetrically arranged load-bearing turntables 201 to form a rigid support structure for fixing the longitudinal beam;

[0055] The adjusting motor 104 drives the horizontal worm 103 to drive the adjusting worm gear 204 to rotate, so that the load-bearing turntable 201 makes a slewing motion along the annular guide rail 102, and then drives the tooling support 5 and the longitudinal beam fixed thereon to realize multi-angle flipping.

[0056] In this embodiment, annular guide rails 102 are symmetrically arranged on the upper left and right sides of the base frame 1. The annular guide rails 102 provide basic support and movement tracks for the entire device. The lower part of the base frame 1 is supported by the mounting base 101. The slewing bearing assembly 2 is composed of two symmetrically arranged load-bearing turntables 201. An annular raceway 202 that rotates in cooperation with the annular guide rail 102 is provided around the outer side surface of each load-bearing turntable 201. Circumferentially equally spaced bearings 203 are arranged inside the annular raceway 202 to reduce the frictional resistance and ensure that the load-bearing turntable 201 can rotate smoothly. The adjusting worm gear 204 is fixedly arranged on the outside of the load-bearing turntable 201, while the horizontal worm 103 is horizontally arranged in the middle of the base frame 1 through a bearing seat and is in meshing transmission with the adjusting worm gear 204. One end of the horizontal worm 103 is connected to the adjusting motor 104 to realize power transmission through motor drive. The tooling support 5 is horizontally bridged between the symmetrically arranged load-bearing turntables 201 and is used to fix the longitudinal beam to ensure the stability of the longitudinal beam during the welding process. When welding, the adjusting motor 104 is started, and the horizontal worm 103 drives the adjusting worm gear 204 to rotate, and then the load-bearing turntable 201 makes a slewing motion along the annular guide rail 102. Since the tooling support 5 spans between the load-bearing turntables 201, it will move with the rotation of the load-bearing turntable 201, so as to realize the multi-angle flipping of the longitudinal beam fixed thereon, facilitate welding operations at different positions, realize the rapid and controllable flipping of the workpiece, reduce the dependence on overhead cranes, forklifts and manual operations in the traditional welding process, and significantly shorten the processing cycle of a single workpiece.

[0057] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、Figure 6 , Figure 7 , Figure 8 As shown in Figure 6 , Figure 7 , and Figure 8 , preferably, the device further includes an angle positioning component 3. The angle positioning component 3 includes an annular scale disk 301 which is fixed on the outer side of the bearing turntable 201 and is calibrated with angle values evenly along the circumferential direction, so that the rotation angle of the current bearing turntable 201 can be visually read for convenient and precise adjustment. The angle positioning component 3 further includes a rotating gear ring 302 which is coaxially and fixedly connected to the outer side of the annular scale disk 301 and rotates synchronously with the annular scale disk 301 and the bearing turntable 201. A linkage gear 303 is meshed and connected to the outer side of the rotating gear ring 302, and a rotary encoder 304 is connected to the shaft end thereof through a coupling. When the bearing turntable 201 and the rotating gear ring 302 rotate, the linkage gear 303 rotates accordingly, converting mechanical motion into an electrical signal and transmitting it to the rotary encoder 304. Moreover, the rotary encoder 304 is electrically connected to the adjusting motor 104 to form a closed-loop feedback control system. The rotary encoder 304 detects and feeds back the rotation angle data to the adjusting motor 104 in real time to ensure that each flip can reach the predetermined angle. When the bearing turntable 201 rotates, the rotating gear ring 302 drives the linkage gear 303 to rotate, and the rotary encoder 304 detects and feeds back the rotation angle data to the adjusting motor 104 in real time, realizing precise positioning and quantitative adjustment of the longitudinal beam flip angle, being able to quickly respond to different welding requirements. Whether it is flat welding, vertical welding or overhead welding, it can be quickly adjusted to the best welding angle, greatly improving the versatility and flexibility of the equipment.

[0058] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, preferably, the device further includes a clamping and fixing assembly 4, which includes a clamping and fixing disk 401 fixedly connected coaxially with the bearing turntable 201. The clamping and fixing disk 401 rotates synchronously with the bearing turntable 201. Inside the clamping caliper 402 fixed to the base frame 1, there is a fitting clamping groove 403 whose shape matches the outer edge of the clamping and fixing disk 401. When the bearing turntable 201 drives the tooling support 5 to drive the longitudinal beam to rotate to the target angle, the clamping and fixing disk 401 applies a radial clamping force through the clamping caliper 402 to lock the rotational freedom of the clamping and fixing disk 401 and the bearing turntable 201, thereby fixing the welding pose of the longitudinal beam. Symmetrically arranged inside the fitting clamping groove 403 are hydraulic cylinders 404. A hydraulic piston 405 is slidably fitted inside the hydraulic cylinder 404. The outer end of the hydraulic piston 405 is fixedly connected to a friction clamping piece 406. The middle of the friction clamping piece 406 is elastically connected to the hydraulic cylinder 404 through a return spring 407. The outer end of the hydraulic cylinder 404 is connected with a hydraulic pump 408. When it is necessary to fix the welding pose of the longitudinal beam, first, the bearing turntable 201 and the tooling support 5 are rotated to the target angle by adjusting the motor 104. Then, the hydraulic pump 408 is started to inject pressure oil into the hydraulic cylinder 404, so that the hydraulic piston 405 pushes the friction clamping piece 406 to move outward and press against the clamping and fixing disk 401, locking the bearing turntable 201 by using the frictional force to prevent it from rotating continuously. After welding, the hydraulic pump 408 is depressurized, and the return spring 407 pulls the friction clamping piece 406 back to the initial position to release the clamping lock on the clamping and fixing disk 401 for the next angle adjustment or operation. Through the radial clamping force provided by the clamping and fixing assembly 4, the position of the bearing turntable 201 can be effectively locked, ensuring that the longitudinal beam will not be displaced during the welding process, greatly improving the welding accuracy and quality.

[0059] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, preferably, a lifting guide frame 602 is vertically arranged at the center of the base frame 1 of the device, providing guidance and support for the vertical movement of the entire auxiliary support system. An auxiliary support platform 6 is arranged inside the lifting guide frame 602 and can move up and down along the lifting guide frame 602 under the action of a hydraulic telescopic rod 603. The auxiliary support platform 6 is slidably connected to the lifting guide frame 602. A plurality of freely rotatable guide rollers 601 are evenly distributed along the transverse direction at its top. These rollers are used to support and guide the longitudinal beam to be translated to the clamping station of the tooling bracket 5. The fixed end of the hydraulic telescopic rod 603 is fixedly connected to the lifting guide frame 602, and its telescopic end drives the auxiliary support platform 6 to vertically lift and lower along the lifting guide frame 602. The lifting and lowering action of the auxiliary support platform 6 is driven and controlled by a hydraulic system. When the hydraulic telescopic rod 603 extends, the auxiliary support platform 6 rises below the tooling bracket 5, supports the longitudinal beam through the guide rollers 601 and assists in translating it to the clamping station of the tooling bracket 5. When the welding of the longitudinal beam is completed, the hydraulic telescopic rod 603 contracts to drive the auxiliary support platform 6 to descend, so that the longitudinal beam is separated from the tooling bracket 5 and unloading is completed, thus realizing the rapid and stable loading and unloading of the longitudinal beam, significantly shortening the preparation and unloading time of a single product.

[0060] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, preferably, the translation guide rail 105 of the device is arranged on the base frame 1 and is perpendicular to the extending direction of the tooling bracket 5. The lifting guide frame 602 is slidably connected to the translation guide rail 105 through the bottom slider, allowing it to move horizontally along the guide rail. A translation rack 106 is fixed in the middle of the translation guide rail 105, and this rack meshes with the translation gear 604 installed at the bottom of the lifting guide frame 602. The shaft end of the translation gear 604 is connected to a translation motor 605, which is used to drive the gear to rotate. The translation motor 605 is fixed to the bottom of the lifting guide frame 602. By driving the translation gear 604 to roll along the translation rack 106, the entire lifting guide frame 602, the auxiliary support table 6 and the longitudinal beam placed on it are driven to move horizontally along the translation guide rail 105. When the longitudinal beam needs to be loaded and unloaded, first use the hydraulic telescopic rod 603 to adjust the height of the auxiliary support table 6 to raise it below the tooling bracket 5 and support the longitudinal beam. Start the translation motor 605 to drive the translation gear 604 to roll along the translation rack 106, and move the lifting guide frame 602 and the auxiliary support table 6 on it smoothly out from directly below the tooling bracket 5 to the outer loading and unloading area. In the loading and unloading area, the operator can conveniently load the longitudinal beam to be welded onto the auxiliary support table 6 or unload the longitudinally welded beam that has been completed. After the loading and unloading are completed, start the translation motor 605 again to move the auxiliary support table 6 together with the newly loaded longitudinal beam or the empty auxiliary support table 6 back below the tooling bracket 5 to prepare for the next operation. Thus, by adding the translation guide rail 105 system, the auxiliary support table 6 can be moved out from directly below the tooling bracket 5 to the external loading and unloading area, greatly simplifying the loading and unloading process of the longitudinal beam and reducing the distance and difficulty of manual handling.

[0061] A longitudinal beam welding and processing method for semi-trailer production includes the following steps:

[0062] S1 Longitudinal beam clamping and positioning: Place the longitudinal beam on the guide roller 601, and raise the auxiliary support table 6 through the hydraulic telescopic rod 603 of the lifting guide frame 602;

[0063] Start the translation motor 605 to drive the lifting guide frame 602 to move along the translation guide rail 105 to directly below the tooling bracket 5;

[0064] Drive the auxiliary support table 6 to rise through the hydraulic telescopic rod 603, so that the longitudinal beam falls into the clamping station of the tooling bracket 5, and clamp and fix the longitudinal beam through the tooling bracket 5;

[0065] S2 Dynamic angle adjustment: Drive the horizontal worm 103 through the adjustment motor 104 to drive the adjustment worm wheel 204 to rotate, so that the bearing turntable 201 rotates along the annular guide rail 102. At the same time, the angle data is real-time fed back through the rotary encoder 304, and the closed-loop correction is carried out until the preset angle, and then the hydraulic locking is carried out through the clamping caliper 402 to eliminate the influence of the worm and gear transmission clearance on the pose;

[0066] S3 Welding Process: According to the angle of the longitudinal beam, the longitudinal beam is welded by a welding torch. When welding in sections, after each area is completed, the clamping caliper 402 is released, the carrying turntable 201 is driven to rotate to the next target angle and then re-locked, and then the welding continues to complete the welding process of the longitudinal beam.

[0067] For the longitudinal beam welding device for semi-trailer production provided by the present invention, the horizontal worm 103 drives the adjusting worm wheel 204 to rotate, and then the carrying turntable 201 makes a rotary motion along the annular guide rail 102. Since the tooling bracket 5 straddles between the carrying turntables 201, it will move as the carrying turntable 201 rotates, thereby realizing the multi-angle flipping of the longitudinal beam fixed on it, facilitating welding operations at different positions, realizing the rapid and controllable flipping of the workpiece, reducing the dependence on overhead cranes, forklifts and manual operations in the traditional welding process, and significantly shortening the processing cycle of a single workpiece.

[0068] Those of ordinary skill in the art should understand that: The discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A longitudinal beam welding device for semi-trailer production, characterized in that Including: A base frame (1) with annular guide rails (102) symmetrically arranged on the left and right sides above it; A slewing support assembly (2) composed of symmetrically arranged load-bearing turntables (201). An annular raceway (202) that rotates in cooperation with the annular guide rail (102) is provided around the outer side of the load-bearing turntable (201), and circumferentially equally spaced bearings (203) are arranged on the inner circumference of the annular raceway (202); An adjusting worm gear (204) is fixedly arranged on the outside of the load-bearing turntable (201). The horizontal worm (103) is horizontally arranged in the middle of the base frame (1) through a bearing seat. The horizontal worm (103) meshes with the adjusting worm gear (204) for transmission, and one end of it is connected to an adjusting motor (104); A tooling bracket (5) is horizontally bridged between the symmetrically arranged load-bearing turntables (201) to form a rigid support structure capable of fixing the longitudinal beam; By driving the horizontal worm (103) with the adjusting motor (104) to drive the adjusting worm gear (204) to rotate, the load-bearing turntable (201) makes a slewing motion along the annular guide rail (102), thereby driving the tooling bracket (5) and the longitudinal beam fixed thereon to achieve multi-angle flipping.

2. The longitudinal beam welding device for semi-trailer production according to claim 1, characterized in that, It further includes an angle positioning assembly (3). The angle positioning assembly (3) includes an annular scale disk (301), and the annular scale disk (301) is fixed on the outside of the load-bearing turntable (201), and angle values are uniformly calibrated along the circumference.

3. The longitudinal beam welding device for semi-trailer production according to claim 2, characterized in that, The angle positioning assembly (3) further includes: A rotating toothed ring (302) is coaxially and fixedly connected to the outside of the annular scale disk (301) and rotates synchronously with the annular scale disk (301) and the load-bearing turntable (201); A linkage gear (303) is meshed on the outside of the rotating toothed ring (302), and a rotary encoder (304) is connected to the shaft end thereof through a coupling; The rotary encoder (304) is electrically connected to the adjusting motor (104) to form a closed-loop feedback control system; When the load-bearing turntable (201) rotates, the rotating toothed ring (302) drives the linkage gear (303) to rotate. The rotating angle data is detected and fed back to the adjusting motor (104) in real time through the rotary encoder (304) to achieve precise positioning and quantitative adjustment of the flipping angle of the longitudinal beam.

4. The longitudinal beam welding device for semi-trailer production according to claim 1, characterized in that, It further includes a clamping and fixing assembly (4), which includes: A clamping and fixing disk (401) is coaxially and fixedly connected to the load-bearing turntable (201) and rotates synchronously with it; Clamping calipers (402) are fixed on the base frame (1), and a fitting clamping groove (403) matching the outer edge shape of the clamping and fixing disk (401) is arranged on the inner side thereof; When the load-bearing turntable (201) drives the tooling bracket (5) to drive the longitudinal beam to rotate to the target angle, the clamping and fixing disk (401) applies a radial clamping force through the clamping calipers (402) to lock the rotational freedom of the clamping and fixing disk (401) and the load-bearing turntable (201), thereby fixing the welding position and posture of the longitudinal beam.

5. The longitudinal beam welding device for semi-trailer production according to claim 4, characterized in that, On the inner side of the chimeric clamping groove (403), hydraulic cylinders (404) are symmetrically arranged. A hydraulic piston (405) is slidably fitted in the hydraulic cylinder (404). The outer end of the hydraulic piston (405) is fixedly connected to a friction clamping piece (406). The middle of the friction clamping piece (406) is elastically connected to the hydraulic cylinder (404) through a return spring (407). The outer end of the hydraulic cylinder (404) is connected with a hydraulic pump (408). When pressure oil is injected into the hydraulic cylinder (404) through the hydraulic pump (408), the hydraulic piston (405) is driven to drive the friction clamping piece (406) to radially press and clamp the clamping fixed disk (401), and the bearing turntable (201) is locked by friction. When the hydraulic cylinder (404) is depressurized through the hydraulic pump (408), the return spring (407) pulls the friction clamping piece (406) to reset, releasing the clamping lock on the clamping fixed disk (401).

6. The longitudinal beam welding device for semi-trailer production according to claim 1, characterized in that, At the center of the base frame (1), a lifting guide frame (602) is vertically arranged. An auxiliary support platform (6) is arranged inside the lifting guide frame (602). The auxiliary support platform (6) is slidably connected with the lifting guide frame (602). A plurality of freely rotatable guide rollers (601) are evenly distributed along the transverse direction at its top, and a hydraulic telescopic rod (603) is connected at the bottom. The fixed end of the hydraulic telescopic rod (603) is fixedly connected with the lifting guide frame (602), and its telescopic end drives the auxiliary support platform (6) to vertically lift along the lifting guide frame (602). When the hydraulic telescopic rod (603) extends, the auxiliary support platform (6) rises below the tooling bracket (5), and the longitudinal beam is supported by the guide rollers (601) and assisted to be translated to the clamping station of the tooling bracket (5). After the longitudinal beam is welded, the hydraulic telescopic rod (603) contracts to drive the auxiliary support platform (6) to descend, so that the longitudinal beam is separated from the tooling bracket (5) and the unloading is completed.

7. The longitudinal beam welding device for semi-trailer production according to claim 6, characterized in that, The bottom of the lifting guide frame (602) is slidably connected with the base frame (1) through a translation guide rail (105). The translation guide rail (105) is arranged perpendicular to the extending direction of the tooling bracket (5). A translation rack (106) is fixed in the middle of the translation guide rail (105). The translation rack (106) meshes with a translation gear (604). The shaft end of the translation gear (604) is connected with a translation motor (605). The translation motor (605) is fixed at the bottom of the lifting guide frame (602). By driving the translation gear (604) to roll along the translation rack (106) through the translation motor (605), the lifting guide frame (602), the auxiliary support platform (6) and the longitudinal beam as a whole are laterally moved along the translation guide rail (105), so that the auxiliary support platform (6) is moved out from directly below the tooling bracket (5) to the outer loading and unloading area, realizing the rapid positioning and unloading of the longitudinal beam.

8. The longitudinal beam welding and processing method for semi-trailer production according to any one of claims 1-7, characterized in that Including the following steps: S1 Longitudinal beam clamping and positioning: Place the longitudinal beam on the guide rollers (601), and raise the auxiliary support platform (6) through the hydraulic telescopic rod (603) of the lifting guide frame (602). Start the translation motor (605) to drive the lifting guide frame (602) to move along the translation guide rail (105) to directly below the tooling bracket (5); Drive the auxiliary support table (6) to rise through the hydraulic telescopic rod (603) so that the longitudinal beam falls into the clamping station of the tooling bracket (5), and clamp and fix the longitudinal beam through the tooling bracket (5); S2 Dynamic angle adjustment: Drive the horizontal worm (103) through the adjustment motor (104) to drive the adjustment worm wheel (204) to rotate, so that the bearing turntable (201) rotates along the annular guide rail (102). At the same time, the angle data is real-time fed back through the rotary encoder (304), and the closed-loop correction is carried out until the preset angle. Then, it is hydraulically locked by the clamping caliper (402) to eliminate the influence of the worm and worm gear transmission clearance on the pose; S3 Welding process: According to the angle of the longitudinal beam, weld the longitudinal beam through the welding torch. When welding in segments, after each area is completed, release the clamping caliper (402), drive the bearing turntable (201) to rotate to the next target angle and then re-lock, and then continue welding to complete the welding process of the longitudinal beam.

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