Aluminum alloy frame automated welding mold and welding process

Abstract

The present invention relates to an automated welding mold for an aluminum alloy frame, comprising a base, on which a first welding mechanism, a second welding mechanism, a third welding mechanism and a robot are provided. The first welding mechanism comprises a first hook fixing mechanism, a lower fork fixing mechanism and a clamping mechanism. The second welding mechanism comprises a second hook fixing mechanism, an upper fork and support rod fixing mechanism and a fastening mechanism. The third welding mechanism comprises a five-way tube fixing mechanism, a third hook fixing mechanism and a middle tube fixing mechanism. The present invention can realize automated welding of the entire vehicle frame, greatly improves welding precision and welding efficiency, and helps promote the process of automated production of the entire frame.

Description

Technical Field

[0001] The invention relates to a welding die, in particular to an automatic welding die for an aluminum alloy vehicle frame and a welding process thereof. Background Art

[0002] With the continuous improvement of people's living standards, the application of bicycles has expanded from traditional means of transportation to leisure sports, especially fitness. Their manufacturing materials have also replaced traditional cast iron and steel with lighter metal materials such as aluminum alloy, titanium alloy, magnesium alloy, and titanium-magnesium alloy. Bicycles made of these materials have advantages such as lightness and good appearance. In recent years, they have become increasingly popular among the general public, especially sports enthusiasts, and their market demand has surged rapidly.

[0003] In the prior art, bicycle frames are welded together from multiple frame tubes. For example, welding is required between the lower fork and the dropouts, between the upper fork and the support rod, and between the lower fork and the dropouts. Currently, welding of aluminum alloy frames mostly adopts manual or semi-automatic methods. The low welding efficiency and quality can no longer meet the growing demand for bicycles and the high quality requirements in the market. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention provides an automated welding mold for an aluminum alloy frame. The welding mold utilizes a robot to realize automated production during the entire welding process, thereby improving the welding efficiency and quality of the aluminum alloy frame.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] An automated welding mold for an aluminum alloy frame includes a base, on which a robot, a first welding mechanism, a second welding mechanism, and a third welding mechanism are disposed. The first welding mechanism includes a first dropout fixing mechanism for fixing a dropout, a lower fork fixing mechanism for fixing a lower fork, and a clamping mechanism. The clamping mechanism is used to push the lower fork fixing mechanism so that the lower fork on the lower fork fixing mechanism and the dropout on the first dropout fixing mechanism fit together to facilitate welding by the robot.

[0007] The second welding mechanism includes a second dropout fixing mechanism for fixing the dropout, an upper fork and support rod fixing mechanism for fixing the upper fork and support rod, and a fastening mechanism, wherein the fastening mechanism is used to push the upper fork and support rod fixing mechanism so that the upper fork on the upper fork and support rod fixing mechanism and the dropout on the second dropout fixing mechanism fit together;

[0008] The third welding structure includes a lower fork fixing shaped block for fixing the lower fork, an upper fork fixing pressure block for fixing the upper fork, a bottom bracket tube fixing mechanism for fixing the bottom bracket tube, a third dropout fixing mechanism for fixing the dropout, and a middle bracket fixing mechanism for fixing the middle bracket tube.

[0009] Preferably, the first welding mechanism also includes a first frame, a first base is provided on the first frame, a workbench is fixedly provided on the upper end of the first base, one side of the workbench is fixedly connected to a support plate, the first hook fixing mechanism is provided on the support plate, and the lower fork fixing mechanism and the clamping mechanism are provided on the workbench.

[0010] Preferably, the first dropout fixing mechanism includes a first dropout positioning inner wide mold and first clamping members respectively provided on both sides of the first dropout positioning inner wide mold, the first dropout positioning inner wide mold being used to place two dropouts, the first clamping members being used to clamp and fix the dropouts, the chain stay fixing mechanism including a first tube profiling block being used to place the chain stay, the first clamping member being a quick clamp;

[0011] A pad is fixedly installed on the support plate between the first clamping member and the first hook positioning inner wide mold, a clamping column is horizontally installed in the pad and the clamping column can slide horizontally in the pad, the quick clamp is connected to the clamping column and can push the clamping column to clamp the hook.

[0012] Preferably, the workbench is provided with a first slide and two parallel first guide rails, the first slide is slidably mounted on the first guide rails, the first pipe profiling block is fixed on the first slide, and the first pipe profiling block is provided with a lower fork profiling groove for placing the lower fork,

[0013] A first strip plate is fixedly mounted on both sides of the first slide plate. A first support block for supporting the lower fork is provided on the first strip plate. The first support block can be adjusted up and down relative to the first strip plate.

[0014] The first strip plate is provided with a slot, the lower end of the first support block is inserted into the slot and fixed by a bolt, the first support block is provided with a U-shaped groove matching the lower fork, the workbench is provided with a plurality of insertion holes, the first slide plate is provided with long holes corresponding to the insertion holes, and the first slide plate is fixed by inserting positioning bolts into the long holes and the insertion holes respectively;

[0015] The lower fork fixing mechanism also includes a support rod clamping mechanism, and the first pipe profiling block is also provided with a support rod profiling groove for placing the support rod. The support rod clamping mechanism includes a pad column and a clamping strip, and the pad column is provided with an oblong hole and a mounting hole. The pad column is fixed to the first slide plate by being locked into the oblong hole by a bolt, and the clamping strip is horizontally inserted into the mounting hole and can move horizontally in the mounting hole. When fixed, the clamping strip is pressed against the upper surface of the support rod.

[0016] Preferably, the clamping mechanism is provided on a workbench on the other side of the chain fork fixing mechanism, and the clamping mechanism comprises a clamping plate and a second clamping member, the clamping plate being located between the chain fork fixing mechanism and the second clamping member, the second clamping member being a quick clamp, and the second clamping member being capable of pushing the clamping plate to fit against the chain fork fixing mechanism and thereby pushing the chain fork on the chain fork fixing mechanism to fit against the dropout on the first dropout fixing mechanism;

[0017] A mounting plate is fixedly provided on the workbench, a quick clamp and a first cushion block are fixedly provided on the mounting plate, a horizontally arranged slide groove is provided on the first cushion block, a slide rod is installed in the slide groove, and one end of the slide rod is fixedly connected to the clamping plate.

[0018] Preferably, the second welding mechanism includes a second base, the second hook fixing mechanism, the upper fork and support rod fixing mechanism and the fastening mechanism are arranged on the second base, the second hook fixing mechanism includes a second hook positioning inner wide mold and first fasteners respectively arranged on both sides of the second hook positioning inner wide mold, the second hook positioning inner wide mold is used to place two hooks, and the first fastener is used to clamp and fix the hooks, the upper fork and support rod fixing mechanism includes a second pipe profiling block, an upper fork stabilizing mechanism and a support rod stabilizing mechanism, the second pipe profiling block is provided with an upper fork profiling groove for placing the upper fork and a support rod profiling groove for placing the support rod, the fastening mechanism is used to push the second pipe profiling block to make the upper fork and the hook fit together, the upper fork stabilizing mechanism is used to press the upper fork in the second pipe profiling block, and the support rod stabilizing mechanism is used to press the support rod in the second pipe profiling block;

[0019] The second hook fixing mechanism also includes a second fastener, and the second hook positioning inner wide mold is fixed to the second base through the second fastener. The first fastener is an adjusting nut. A screw is provided in the second hook positioning inner wide mold, and an adjusting nut is respectively provided at both ends of the screw.

[0020] Preferably, a second slide and two parallel second guide rails are provided on the second base, the second slide is slidably mounted on the second guide rails, and the second pipe profiling block is fixed on the second slide;

[0021] A second strip plate is fixedly installed on both sides of the second skateboard, and a second support block for supporting the upper fork is provided on the second strip plate. The second support block can be adjusted up and down relative to the second strip plate. A slot is provided on the second strip plate, and the lower end of the second support block is inserted into the slot and fixed by bolts. The second support block is provided with a U-shaped groove matching the upper fork, and the second base is provided with a plurality of sockets. The second skateboard is provided with a first oblong hole corresponding to the socket, and the second skateboard is fixed by inserting a positioning bolt into the first oblong hole and the socket respectively.

[0022] Preferably, the support rod stabilizing mechanism includes a second pad and a clamping member, the second pad is provided with a second oblong hole and a mounting hole, the second pad is fixed to the second slide plate by being locked into the second oblong hole by bolts, the clamping member is horizontally inserted into the mounting hole and can move horizontally in the mounting hole, and when fixed, the clamping member 326 is pressed against the upper surface of the support rod.

[0023] Preferably, the fastening mechanism includes a fastening plate and a third fastener, the fastening plate is located between the upper fork and support rod fixing mechanism and the third fastener, the third fastener is a quick clamp, and the quick clamp can push the fastening plate to fit the upper fork and support rod fixing mechanism so that the upper fork fits the dropout;

[0024] The upper fork stabilizing mechanism includes a connecting plate, a clamping plate and a locking piece. The locking piece is placed in the fastening plate. One end of the connecting plate is fixedly connected to the clamping plate. The upper end of the locking piece is inserted into the third oblong hole at the other end of the connecting plate, and the lower end is connected to the spring.

[0025] Preferably, the third welding mechanism also includes a second frame, the lower fork fixing profiling block, the upper fork fixing pressure block, the bottom tube fixing mechanism, the third hook fixing mechanism and the middle tube fixing mechanism are arranged on the second frame, the bottom tube fixing mechanism includes a third support block and a first driving mechanism located on both sides of the third support block, the first driving mechanism is used to clamp the bottom tube, the third hook fixing mechanism includes a third hook positioning inner wide mold and a second driving mechanism located on both sides of the third hook positioning inner wide mold, the third hook positioning inner wide mold is used to place the hook and clamp the hook by the second driving mechanism, the middle tube fixing mechanism includes a third slide plate and a third driving mechanism fixed on the third slide plate, and the third driving mechanism is used to fix the middle tube.

[0026] Preferably, the third support block is fixedly mounted on the second frame, the first driving mechanism is a first driving cylinder, the first driving cylinder is horizontally fixed on the third support block, and the piston rod of the first driving cylinder is fixedly connected to the first pressure block;

[0027] The second driving mechanism is a second driving cylinder, the third hook positioning inner wide mold is fixed to the second frame through the fourth support block, the second driving cylinder is located on the fourth support blocks on both sides of the third hook positioning inner wide mold, and the second driving cylinder is fixedly connected to the second pressure block on the piston rod.

[0028] Preferably, the second frame is further provided with a first adjustment mechanism and a second adjustment mechanism, the first adjustment mechanism is connected to the second frame, the second adjustment mechanism is connected to the first adjustment mechanism, the third slide is slidably provided on the second adjustment mechanism, the second adjustment mechanism can drive the slide to slide, and the first adjustment mechanism can drive the second adjustment mechanism and the third slide to rotate simultaneously.

[0029] Preferably, the first adjustment mechanism includes a first bracket, a first screw, a first manual wheel and a first adjustment block, the first bracket is fixedly connected to the second frame, the first bracket is provided with a first screw, the first adjustment block is screwed to the first screw, and one end of the first screw is fixedly connected to the first manual wheel.

[0030] Preferably, the second adjustment mechanism includes a second bracket, a second screw, a second manual wheel and a second adjustment block, the second bracket is fixedly connected to the first adjustment block, the second bracket is provided with a second screw, the second adjustment block is screwed to the second screw, one end of the second screw is fixedly connected to the second manual wheel, and the lower end of the second bracket is rotatably sleeved on the first driving mechanism;

[0031] The second bracket is provided with a sliding groove along its height direction, the third slide is slidably arranged in the sliding groove of the second bracket and the third slide is fixedly connected to the second adjustment block, and the third slide is also provided with a middle tube stopper;

[0032] The third driving mechanism is a third driving cylinder, and a third pressing block is fixedly provided on the piston rod of the third driving cylinder.

[0033] The present invention also provides a welding process for an automated welding mold for an aluminum alloy vehicle frame, comprising the following steps:

[0034] Step 1: Place the lower fork, the dropout, and the support rod in a first welding mechanism, and align the lower fork and the dropout at locations to be welded, and the lower fork and the support rod at locations to be welded, and weld the aforementioned locations using a robot to form the lower fork frame;

[0035] Step 2: Place the upper fork and another support rod in a second welding mechanism, and fit the upper fork and the support rod at the places to be welded together, and use a robot to weld the places to be welded to form an upper fork frame;

[0036] Step 3: Place the front triangle, the lower fork frame welded in step 1, and the upper fork frame welded in step 2 in the third welding mechanism, and make the upper fork and the dropout, the bottom bracket and the lower fork, and the upper fork and the middle tube fit together. Use a robot to weld the above-mentioned welded parts to form the entire vehicle frame.

[0037] Preferably, the specific steps of step one are as follows:

[0038] Step 1a: Select a suitable first hook positioning inner wide mold and fix the first hook positioning inner wide mold on the support plate. At the same time, place the hook to be welded on the first hook positioning inner wide mold and fix the hook with a first clamping member;

[0039] Step 1b: Select a suitable first pipe profiling block and install the first pipe profiling block on the first slide, place the lower fork and the support rod in the profiling groove of the first pipe profiling block, and adjust the height of the first support block so that the first support block supports the lower fork. Use the support rod pressing mechanism to press the support rod, and the lower fork and the support rod are in contact with each other at the parts to be welded;

[0040] Step 1c: Adjust the second clamping member. Under the action of the second clamping member, the first slide slides toward the dropout until the lower fork is in contact with the dropout. Use the positioning bolt to fix the position of the first slide. Finally, use the robot to call out the corresponding welding program to weld the connection between the lower fork and the dropout and the contact between the lower fork and the support rod to form the lower fork frame.

[0041] Preferably, the specific steps in step 2 are as follows:

[0042] Step 2a: Select a suitable second hook positioning inner wide mold, place the second hook positioning inner wide mold on the second base, and clamp the second hook positioning inner wide mold with a second fastener. At the same time, place the hook on the second hook positioning inner wide mold and fix the hook with the first fastener.

[0043] Step 2b: Select a suitable second pipe profiling block and install it on the second slide. Place the upper fork and the support rod in the upper fork profiling groove and the support rod profiling groove respectively. At this time, the upper fork and the support rod to be welded are in contact with each other, and adjust the height of the second support block to make it support the upper fork.

[0044] Step 2c: Adjust the third fastener. Under the action of the third fastener, the second slide plate slides toward the dropout until the upper fork fits against the dropout. Use the positioning bolt to fix the position of the second slide plate.

[0045] Step 2d: Pull out the clamping piece toward the support rod so that it is pressed onto the support rod. Adjust the clamping plate to an appropriate position and press it downward so that the clamping plate is pressed onto the upper fork. At the same time, the upper end of the locking piece protrudes from the connecting plate. Rotate the locking piece 90° so that the upper end of the locking piece presses the connecting plate and locks the clamping plate. Finally, use the robot to call out the corresponding welding program to weld the upper fork and the support rod to form the upper fork frame.

[0046] Preferably, the specific steps in step three are as follows:

[0047] Step 3a: Select a suitable lower fork fixing profiling block, upper fork fixing pressing block, and third dropout positioning inner width mold and fix them on the second frame;

[0048] Step 3b: placing the lower fork on the lower fork frame in the lower fork fixing profiling block, and placing the dropouts on the lower fork frame on the third dropout positioning inner wide mold, while simultaneously activating the two second driving cylinders so that the second driving cylinders fix the dropouts;

[0049] Step 3c: Place the upper fork of the upper fork frame in the upper fork fixing block, and make the lower end of the upper fork fit on the dropout. The contact point between the upper fork and the dropout is the first welding point.

[0050] Step 3d: Place the front tripod on the third support block and use the first drive cylinders on both sides of the support block to clamp the bottom bracket. At this point, the bottom bracket contacts the lower fork, which is the second welding point.

[0051] Step 3e: If the distance between the third drive cylinder and the middle tube exceeds the stroke of the piston rod of the third drive cylinder, adjust the second manual wheel so that the third drive cylinder is close to the middle tube, and finally use the third drive cylinder to press against the upper end of the middle tube;

[0052] Step 3f: Adjust the first manual wheel as needed to rotate the second bracket around the bottom bracket tube, causing the middle tube on the bracket to tilt and fit onto the upper fork. The joint between the upper fork and the middle tube is the third welding point.

[0053] Step 3g: At this point, the bottom bracket, center tube, dropouts, upper fork, and lower fork are all fixed. Finally, the robot is used to call out the corresponding welding program to weld the above three welded parts to form the complete vehicle frame.

[0054] The beneficial effects of the present invention are:

[0055] 1) The present invention mainly includes a first welding mechanism, a second welding mechanism, and a third welding mechanism. The first welding mechanism is used to fix the lower fork, the dropout, and the support rod, and a robot is used to weld them together to form a lower fork frame. The second welding mechanism is used to fix the upper fork and the support rod, and a robot is used to weld them together to form an upper fork frame. The third welding mechanism is used to fix the front triangle, the upper fork frame, and the lower fork frame. Finally, a robot is used to weld them together to form a complete vehicle frame. The present invention realizes automated welding of the entire frame. Multiple robots can work alternately, thereby improving welding efficiency and achieving high welding precision.

[0056] 2) To meet the welding requirements of frames of different specifications, only the hook positioning inner width mold and pipe profiling block need to be replaced, without replacing the main mold body. Therefore, the mold can be quickly replaced to ensure uninterrupted production. By rationally designing the position of the equipment and mold and avoiding the robot welding points, the present invention can control the weldability rate to 70-80% and the completion rate to over 90%. The 15 manual standard lines of the present invention replace the traditional 23-25 manual lines, and the output is increased from 400 units / 10 hours to 450-500 units / 10 hours, which not only reduces manpower but also increases output, and is very practical.

[0057] 3) The robot in the present invention uses a long-neck welding gun, which is easier to extend and the welding angle is more flexible; the robot used for welding the upper fork and the lower fork is a single-machine robot station, not equipped with a negative axis, and adopts a reservation welding program to weld the No. 1 or No. 2 station. The program writing path adopts movl, the path is more stable, and the No. 1 or No. 2 station can weld the same type of vehicle, and can also weld different types of vehicles at the same time; the third welding mechanism adopts a single robot station, equipped with two negative axes, and adopts a reservation welding program to weld the No. 1 or No. 2 station. The program writing path adopts smovl and The SMOV C combination provides a more stable path. Stations 1 and 2 can weld the same type of vehicle or different types simultaneously. The welding process adopts Fronius CMT welding technology, which reduces heat input and is more suitable for welding thin aluminum alloy pipes. When the pipes are thicker (wall thickness > 2.5mm), the CMT+P welding mode is adopted. The weld bead has a beautiful fish-scale shape and the weld penetration meets the strength requirements. When the aluminum alloy thin pipes are thin (wall thickness < 2.5mm), the standard CMT welding mode is adopted. The weld bead has a beautiful fish-scale shape, small spatter and heat input, and the pipe is not easy to penetrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a simplified structural diagram of the present invention;

[0059] Figure 2 Schematic diagram of the structure of the first welding mechanism in the present invention;

[0060] Figure 3 A top view of the first welding mechanism of the present invention;

[0061] Figure 4 Schematic diagram of the structure of the second welding mechanism in the present invention;

[0062] Figure 5 is a top view of the second welding mechanism in the present invention;

[0063] Figure 6 Schematic diagram of the structure of the third welding mechanism in the present invention;

[0064] Figure 7 is another structural schematic diagram of the third welding mechanism in the present invention;

[0065] In the figure: 100-base, 101-robot,

[0066] 200-first welding mechanism, 201-first frame, 202-first base, 203-workbench, 204-support plate, 205-first guide rail, 210-first hook fixing mechanism, 211-first hook positioning inner wide mold, 212-first clamping member, 213-pad, 214-clamping column, 220-lower fork fixing mechanism, 221-first pipe profiling block, 222-first slide plate, 223-first strip plate, 224-first support block, 225-pad column, 226-pressing strip, 230-clamping mechanism, 231-clamping plate, 232-second clamping member, 233-mounting plate, 234-first pad, 235-slide rod,

[0067] 300-second welding mechanism, 301-second base, 302-second guide rail, 310-second hook fixing mechanism, 311-second hook positioning inner wide mold, 312-first fastener, 313-second fastener, 320-upper fork and support rod fixing mechanism, 321-second pipe profiling block, 322-second slide plate, 323-second strip plate, 324-second support block, 325-second cushion block, 326-pressing member, 327-connecting plate, 328-pressing plate, 329-locking member, 330-fastening mechanism, 331-fastening plate, 332-third fastener,

[0068] 400-third welding mechanism, 401-second frame, 402-lower fork fixed profiling block, 403-upper fork fixed pressure block, 410-five-way pipe fixing mechanism, 411-third support block, 412-first driving cylinder, 413-first pressure block, 420-third hook fixing mechanism, 421-fourth support block, 422-third hook positioning inner wide mold, 423-second driving cylinder, 430-middle pipe fixing mechanism, 431-third slide plate, 432-third driving cylinder, 433-third pressure block, 434-middle pipe stopper, 440-first adjusting mechanism, 441-first bracket, 442-first screw, 443-first manual wheel, 444-first adjusting block, 450-second adjusting mechanism, 451-second bracket, 452-second screw, 453-second manual wheel, 454-second adjusting block,

[0069] 500-frame, 501-bottom bracket, 502-middle tube, 503-dropouts, 504-upper fork, 505-chain fork, 506-support rod. DETAILED DESCRIPTION

[0070] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0071] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0072] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0073] Example: Figure 1-7 As shown, an automated welding mold for an aluminum alloy vehicle frame is characterized by comprising a base 100, on which a robot 101, a first welding mechanism 200, a second welding mechanism 300, and a third welding mechanism 400 are disposed. The first welding mechanism 200 includes a first dropout fixing mechanism 210 for fixing a dropout 503, a lower fork fixing mechanism 220 for fixing a lower fork 505, and a clamping mechanism 230. The clamping mechanism 230 is used to push the lower fork fixing mechanism 220 so that the lower fork 505 on the lower fork fixing mechanism and the dropout 503 on the first dropout fixing mechanism 210 fit together to facilitate welding by the robot 101.

[0074] The second welding mechanism 300 includes a second dropout fixing mechanism 310 for fixing the dropout, a fork and support rod fixing mechanism 320 for fixing the upper fork 504 and the support rod 506, and a fastening mechanism 330. The fastening mechanism 330 is used to push the upper fork and support rod fixing mechanism 320 so that the upper fork 504 on the upper fork and support rod fixing mechanism 320 and the dropout 503 on the second dropout fixing mechanism 310 fit together.

[0075] The third welding structure 400 includes a lower fork fixing shaped block 402 for fixing the lower fork 505, an upper fork fixing pressure block 403 for fixing the upper fork 504, a bottom bracket tube fixing mechanism 410 for fixing the bottom bracket tube 501, a third dropout fixing mechanism 420 for fixing the dropout 503, and a middle tube fixing mechanism 430 for fixing the middle tube 502.

[0076] The present invention is used to automatically weld multiple points of a bicycle frame 500, which includes a bottom bracket 501, a middle bracket 502, a dropout 503, an upper fork 504, a lower fork 505, and a support rod 506. The present invention mainly includes three steps during operation. In the first step, the first welding mechanism 200 fixes the lower fork and the dropout and makes the lower fork and the dropout to be welded fit together, and the robot 101 is used to weld the lower fork and the dropout to be welded; in the second step, the second welding mechanism 300 fixes the upper fork and the support rod and makes the upper fork and the dropout fit together. The positions to be welded of the support rod are fitted, and the robot 101 is used to weld the positions to be welded of the upper fork and the support rod; in the third step, the third welding mechanism 400 respectively fixes the welded lower fork and the dropout, the upper fork and the support rod, and the front triangle, and the robot 101 is used to weld the positions to be welded of the bottom bracket tube and the lower fork, the positions to be welded of the upper fork and the dropout, and the positions to be welded of the middle tube and the upper fork, thus forming a welded frame. The present invention improves the efficiency of the welding process and the accuracy of welding, and helps to promote the process of automated production of the entire frame.

[0077] like Figure 2 and Figure 3 As shown, the first welding mechanism 200 further includes a first frame 201, a first base 202 is provided on the first frame 201, a workbench 203 is fixedly provided on the upper end of the first base 202, one side of the workbench 203 is fixedly connected to a support plate 204, the first hook fixing mechanism 210 is provided on the support plate 204, the lower fork fixing mechanism 220 and the clamping mechanism 230 are provided on the workbench 203. The first base 202 and the workbench 203 are fixedly connected by a pillar, and the support plate 204 and the workbench 203 are fixedly connected by a connecting block. The support plate 204 is a long strip and a certain distance is set between the support plate and the workbench, as shown in FIG. Figure 2As shown, the first dropout fixing mechanism 210 , the chain fork fixing mechanism 220 and the clamping mechanism 230 are arranged in sequence from left to right.

[0078] The first dropout fixing mechanism 210 includes a first dropout positioning inner wide mold 211 and first clamping members 212 respectively provided on both sides of the first dropout positioning inner wide mold 211. The first dropout positioning inner wide mold 211 is used to place the two dropouts 503, and the first clamping members 212 are used to clamp and fix the dropouts 503. The chain stay fixing mechanism 220 includes a first tube profiling block 221 for placing the chain stay 505. The first clamping member 212 is a quick clamp.

[0079] A pad 213 is fixedly installed on the support plate 204 between the first clamping member 212 and the first hook positioning inner wide mold 211, and a clamping column 214 is horizontally installed in the pad 213 and the clamping column 214 can slide horizontally in the pad. The quick clamp is connected to the clamping column and can push the clamping column 214 to clamp the hook 503. The first hook positioning inner wide mold 211 is detachably mounted on the middle part of the support plate 204, and two groups of first clamping members 212 are respectively mounted on both ends of the support plate 204, and the two hooks 503 are respectively fitted on both ends of the first hook positioning inner wide mold and the hooks are clamped by adjusting the quick clamps. The quick clamps can be conventional quick clamps on the market, which will not be introduced in detail here. The first hook positioning inner wide mold 211 is fixed to the support plate 204 by bolts. The first hook positioning inner wide mold 211 of different specifications can be replaced as needed, and then the two hooks are placed on both ends of the first hook positioning inner wide mold and the hooks are quickly clamped by using the quick clamps, so as to meet the welding requirements of various specifications of frames and complete rapid mold change.

[0080] The workbench 203 is provided with a first slide 222 and two parallel first guide rails 205. The first slide 222 is slidably mounted on the first guide rails 205. The first pipe profiling block 221 is fixed on the first slide 222. The first pipe profiling block 221 is provided with a lower fork profiling groove for placing the lower fork 505.

[0081] A first strip plate 223 is fixedly mounted on both sides of the first slide plate 222. A first support block 224 for supporting the lower fork 505 is provided on the first strip plate 223. The first support block 224 can be adjusted up and down relative to the first strip plate 223.

[0082] The first strip plate 223 is provided with a slot, the lower end of the first support block 224 is inserted into the slot and fixed by bolts, the first support block 224 is provided with a U-shaped groove matching the lower fork 505, the workbench 203 is provided with a plurality of sockets, the first slide plate 222 is provided with a long hole corresponding to the socket, and the first slide plate 222 is fixed by inserting the positioning bolts into the long hole and the socket respectively; the workbench 203 is provided with a first slide plate 222 that can slide along it, and the first pipe profiling block 221 is fixedly installed on the first slide plate, and the first pipe profiling block 221 is provided with a profiling groove matching the lower fork 505. The end of the fork 505 close to the bottom bracket 501 is fixedly installed in the profiling groove. Before welding, the clamping mechanism 230 is used to push the first slide plate 222 to slide towards the claw 503 until the lower fork 505 and the claw 503 are in contact with each other. In order to further improve the stability of the lower fork during welding, a first strip plate 223 is provided on each of the first slide plates on the front and rear sides of the first pipe profiling block 221. A first support block 224 is fixed on the first strip plate 223. The first support block 224 is arranged close to the support plate 204, and the lower fork is just placed in the U-shaped groove on the support block. The height of the first support block 224 can be adjusted to meet the fixing requirements of lower forks of different specifications, such as Figure 3 As shown, the workbench is provided with a plurality of sockets and the first slide is provided with a long hole. After the position of the first slide 222 is adjusted, the position of the slide is fixed by locking the jacks and the long hole with a positioning bolt.

[0083] The lower fork fixing mechanism 220 also includes a support rod clamping mechanism. The first pipe profiling block 221 is also provided with a support rod profiling groove for placing the support rod 506. The support rod clamping mechanism includes a pad column 225 and a clamping strip 226. The pad column 225 is provided with an oblong hole and a mounting hole. The pad column is fixed to the first slide 222 by being locked into the oblong hole by a bolt. The clamping strip 226 is horizontally inserted into the mounting hole and can move horizontally in the mounting hole. When fixed, the clamping strip 226 is pressed against the upper surface of the support rod 506. Figure 3 As shown, the oblong hole provided can adjust the position of the pad column 225 in the left and right directions on the first slide plate 222, one end of the clamping strip 226 is inserted tightly into the mounting hole of the pad column, and the other end extends to the support rod 506. When the support rod 506 is placed, the clamping strip is pulled out to the right to press it onto the support rod 506, thereby further improving the stability of the support rod during welding; the support rod 506 is placed using the support rod profiling groove so that the support rod and the part to be welded of the lower fork fit together, and then the support rod clamping mechanism is used to press the support rod, and finally the part to be welded of the support rod and the lower fork can be welded using a robot.

[0084] The clamping mechanism 230 is disposed on the workbench 203 on the other side of the chain stay fixing mechanism 220. The clamping mechanism 230 includes a clamping plate 231 and a second clamping member 232. The clamping plate 231 is located between the chain stay fixing mechanism 220 and the second clamping member 232. The second clamping member 232 is a quick clamp. The second clamping member 232 can push the clamping plate to fit against the chain stay fixing mechanism, thereby pushing the chain stay 505 on the chain stay fixing mechanism 220 to fit against the dropout 503 on the first dropout fixing mechanism.

[0085] A mounting plate 233 is fixed to the workbench 203. A quick clamp and a first spacer block 234 are fixed to the mounting plate. The first spacer block is provided with a horizontally arranged slot, within which a slide bar 235 is mounted. One end of the slide bar 235 is fixedly connected to the clamping plate 231. The mounting plate 233 and the first dropout fixing mechanism 210 are located on either side of the chain stay fixing mechanism. The first spacer block 234 is located between the quick clamp and the first slide plate 222. The slide bar 235 fits horizontally and tightly within the slot on the first spacer block 234. Both ends of the slide bar 235 protrude from the first spacer block. One end of the first spacer block, which is closest to the first slide plate 222, is fixedly connected to the clamping plate 231, while the other end is connected to the quick clamp. When positioning is required, the quick clamp is adjusted, which pushes the slide bar 235 forward, causing the clamping plate 231 to abut against the first pipe profiling block 221. This in turn drives the slide plate forward, causing the chain stay 505 on the slide plate to abut against the dropout 503 on the first dropout fixing mechanism.

[0086] like Figure 4 and Figure 5 As shown, the second welding mechanism 300 includes a second base 301, a second hook fixing mechanism 310, an upper fork and support rod fixing mechanism 320 and a fastening mechanism 330 are arranged on the second base, the second hook fixing mechanism 310 includes a second hook positioning inner wide mold 311 and first fasteners 312 respectively arranged on both sides of the second hook positioning inner wide mold 311, the second hook positioning inner wide mold 311 is used to place two hooks 503, the first fasteners 312 are used to clamp and fix the hooks 503, the upper fork and support rod fixing mechanism 320 and the ... The rod fixing mechanism 320 includes a second tube profiling block 321, an upper fork stabilizing mechanism and a support rod stabilizing mechanism. The second tube profiling block 321 is provided with an upper fork profiling groove for placing the upper fork 504 and a support rod profiling groove for placing the support rod 506. The fastening mechanism 330 is used to push the second tube profiling block 321 so that the upper fork 504 and the hook 503 fit together. The upper fork stabilizing mechanism is used to compress the upper fork 504 in the second tube profiling block, and the support rod stabilizing mechanism is used to compress the support rod 506 in the second tube profiling block.

[0087] like Figure 4 and Figure 5As shown, the length direction of the second base 301 is defined as the left-right direction, and the second hook fixing mechanism 310, the upper fork and support rod fixing mechanism 320 and the fastening mechanism 330 are arranged on the second base 301 from left to right. A suitable second hook positioning inner wide mold 311 is selected and fixed to the second base 301. Then, the two hooks 503 are placed on the second hook positioning inner wide mold 311 and the hooks are clamped by the first fastener 312. A suitable second pipe profiling block 321 is selected and installed on the second On the skateboard 322, the two upper forks 504 are placed in the upper fork profiling grooves, and the support rod 506 is placed in the support rod profiling grooves. At this time, the parts of the upper forks and the support rod to be welded fit each other. The fastening mechanism 330 is used to push the upper fork and support rod fixing mechanism 320 to make the upper fork 504 and the hook 503 press tightly. Finally, the upper fork stabilizing mechanism and the support rod stabilizing mechanism are adjusted so that the two are pressed against the upper surfaces of the upper fork 504 and the support rod 506 respectively. The robot 101 is used to weld the parts of the upper fork and the support rod to be welded, and the two upper forks are connected through the support rod.

[0088] The second hook fixing mechanism 310 also includes a second fastener 313, which secures the second hook positioning inner width mold 311 to the second base 301. The first fastener 312 is an adjustment nut. The second hook positioning inner width mold 311 is provided with a screw, and an adjustment nut is sleeved on each end of the screw. When the hook 503 is installed on the second hook positioning inner width mold 311, the adjustment nuts at both ends are tightened to clamp the hook. One end of the second fastener 313 is hinged to the second base 301. After the second hook positioning inner width mold 311 of the selected specifications is placed on the second base 301, the second fastener 313 is rotated to press the second hook positioning inner width mold 311 against the second base. The second fastener 313 allows the second hook positioning inner width mold 311 to be quickly replaced to meet the welding requirements of products of different specifications. This is convenient, efficient, and has a wide range of applications.

[0089] The second base 301 is provided with a second slide 322 and two parallel second guide rails 302. The second slide 322 is slidably mounted on the second guide rails 302, and the second pipe profiling block 321 is fixed to the second slide 322. The second base 301 is provided with a second slide 322 capable of sliding along the second slide, and the second pipe profiling block 321 is fixedly mounted on the second slide. The second pipe profiling block 321 is provided with a profiling groove that matches the upper fork 504 and the support rod 506. After the upper fork 504 and the support rod 506 are placed in their respective profiling grooves, the upper fork and the support rod are fitted together at the locations to be welded. Before welding, the fastening mechanism 330 is used to push the second slide 322 to slide toward the hook 503 until the upper fork 504 and the hook 503 are fitted together.

[0090] A second strip plate 323 is fixedly installed on both sides of the second slide plate 322, and a second support block 324 for supporting the upper fork 504 is provided on the second strip plate 323. The second support block 324 can be adjusted up and down relative to the second strip plate 323. A slot is provided on the second strip plate 323, and the lower end of the second support block 324 is inserted into the slot and fixed by bolts. The second support block 324 is provided with a U-shaped groove matching the upper fork 504, and a plurality of sockets are provided on the second base 301. A first oblong hole corresponding to the socket is provided on the second slide plate 322, and the second slide plate 322 is fixed by inserting a positioning bolt into the first oblong hole and the socket respectively. In order to further improve the stability of the upper fork when it is welded to the support rod, a second strip plate 323 is provided on each of the second slide plates on the front and rear sides of the second pipe profiling block 321. A second support block 324 is fixed on the second strip plate 323. The second support block 324 is arranged close to the second hook fixing mechanism 310, and the upper fork is just placed in the U-shaped groove on the second support block. By adjusting the height of the second support block 324, the fixing requirements of upper forks of different specifications can be met, such as Figure 5 As shown, the second base is provided with a plurality of jacks and the slide is provided with a first oblong hole. When the position of the second slide 322 is adjusted, the position of the second slide is fixed by locking the jacks and the first oblong hole with a positioning bolt.

[0091] The support rod stabilizing mechanism includes a second pad 325 and a pressing member 326. The second pad 325 is provided with a second oblong hole and a mounting hole. The second pad is fixed to the second slide plate 322 by being bolted into the second oblong hole. The pressing member 326 is horizontally inserted into the mounting hole and can move horizontally in the mounting hole. When fixed, the pressing member 326 is pressed against the upper surface of the support rod 506. Figure 4 As shown, the second oblong hole provided can adjust the left-right position of the second pad 325 on the second base 301. One end of the clamping member 326 is inserted tightly into the mounting hole of the second pad, and the other end extends toward the support rod 506. When the support rod 506 is placed, the clamping member is pulled out to the right so that it is pressed onto the support rod 506, thereby further improving the stability of the support rod during welding.

[0092] The fastening mechanism 330 includes a fastening plate 331 and a third fastener 332. The fastening plate 331 is located between the upper fork and support rod fixing mechanism 320 and the third fastener 332. The third fastener 332 is a quick clamp. The quick clamp can push the fastening plate 331 to fit the upper fork and support rod fixing mechanism 320, thereby making the upper fork 504 fit into the hook 503. When positioning is required, adjust the quick clamp, the quick clamp pushes the fastening plate 331, and the fastening plate pushes the second skateboard forward so that the upper fork 504 on the second skateboard fits into the hook 503 on the second hook fixing mechanism.

[0093] The upper fork stabilizing mechanism includes a connecting plate 327, a clamping plate 328 and a locking member 329. The locking member 329 is placed in the fastening plate 331. One end of the connecting plate 327 is fixedly connected to the clamping plate 328. The upper end of the locking member 329 is inserted into the third oblong hole at the other end of the connecting plate, and the lower end is connected to the spring. The clamping plate 328 is arranged perpendicular to the connecting plate 327. When the position of the upper fork is determined, the position of the clamping plate 328 can be adjusted left and right. Because the other end of the connecting plate is provided with an oblong hole, the connecting plate can move left and right relative to the locking piece 329. After adjusting the position of the clamping plate, press the clamping plate 328 downward so that the clamping plate is pressed against the upper fork 504. At the same time, the upper end of the locking piece 329 protrudes from the connecting plate. After rotating the locking piece 329 90°, the upper end of the locking piece presses the connecting plate 327, and the clamping plate 328 is locked. At this time, the spring is compressed. When the locking piece 329 is released, the clamping plate 328 moves upward under the action of the spring restoring force to release the upper fork 504.

[0094] like Figure 6 and Figure 7As shown, the third welding mechanism 400 also includes a second frame 401, the lower fork fixing profiling block 402, the upper fork fixing pressure block 403, the bottom tube fixing mechanism 410, the third hook fixing mechanism 420 and the middle tube fixing mechanism 430 are arranged on the second frame 401, the bottom tube fixing mechanism 410 includes a third support block 411 and a first driving mechanism located on both sides of the third support block 411, the first driving mechanism is used to clamp the bottom tube 501, the third hook fixing mechanism 420 includes a third hook positioning inner wide mold 422 and a second driving mechanism located on both sides of the third hook positioning inner wide mold, the third hook positioning inner wide mold 422 is used to place the hook 503 and clamp the hook by the second driving mechanism, the middle tube fixing mechanism 430 includes a third slide 431 and a third driving mechanism fixed on the third slide, and the third driving mechanism is used to fix the middle tube 502. The third welding mechanism 400 is used to fix the bottom bracket 501, the middle bracket 502, the dropouts 503, the upper fork 504 and the lower fork 505 of the frame 500, and to make the parts to be welded between the bottom bracket 501 and the lower fork 505 fit together, the parts to be welded between the upper fork 504 and the dropouts 503 fit together, and the parts to be welded between the middle bracket 502 and the upper fork 504 fit together, and the robot 101 is used to perform precise welding on the above three parts. During operation, the front triangle of the frame is placed on the second frame 401, the bottom bracket 501 of the frame is fixed by the bottom bracket fixing mechanism 410, the middle bracket 502 of the frame is fixed by the middle bracket fixing mechanism 430, and the front triangle of the frame is fixed to the frame, the lower fork fixing imitation block 402 is horizontally arranged on the second frame 401, the upper fork fixing pressure block 403 is obliquely fixed on the second frame 401, and when the lower fork 505 is placed on the lower fork fixing imitation block, one end of the lower fork fits against the lower fork fixing imitation block. The upper fork 504 is fitted on the five-way tube 501 (the place to be welded here), and the other end is connected to the claw 503. The claw 503 is fixed by the third claw fixing mechanism 420. When the upper fork is placed on the upper fork fixing block 403, the upper fork 504 is arranged tilted relative to the second frame 401. The upper end of the upper fork 504 is fitted on the middle tube 502 (the place to be welded here), and the lower end thereof is fitted on the claw 503 (the place to be welded here). The robot 101 can then be used to weld the above three places.

[0095] The third support block 411 is fixedly mounted on the second frame 401. The first driving mechanism is a first driving cylinder 412, which is horizontally fixed to the third support block 411. The piston rod of the first driving cylinder 412 is fixedly connected to a first pressing block 413. When the front triangle of the frame is placed on the third support block 411, the first driving cylinders 412 on both sides are activated simultaneously, causing the first pressing blocks 413 to clamp the bottom bracket 501.

[0096] The second driving mechanism comprises a second driving cylinder 423. The third dropout positioning inner wide mold 422 is fixed to the second frame 401 via a fourth support block 421. The second driving cylinder 423 is located on the fourth support blocks 421 on both sides of the third dropout positioning inner wide mold 422. The piston rod of the second driving cylinder 423 is fixedly connected to a second pressure block. A suitable chainstay fixing shaped block 402 is selected and fixed to the second frame 401. A suitable third dropout positioning inner wide mold 422 is selected and fixed to the fourth support block 421. The chainstay 505 is then placed within the chainstay fixing shaped block 402. The chainstay 505 is fitted to the bottom bracket 501, and the dropout 503 thereon is placed in the third dropout positioning inner wide mold 422. Simultaneously, the second driving cylinders 423 on both sides are activated, causing the second pressure blocks to clamp the two dropouts.

[0097] The second frame 401 is further provided with a first adjustment mechanism 440 and a second adjustment mechanism 450. The first adjustment mechanism 440 is connected to the second frame 401, and the second adjustment mechanism 450 is connected to the first adjustment mechanism 440. The third slide 431 is slidably mounted on the second adjustment mechanism 450. The second adjustment mechanism 450 can drive the slide 431 to slide, and the first adjustment mechanism 440 can drive the second adjustment mechanism 450 and the third slide 431 to rotate simultaneously. The second adjustment mechanism 450 can be used to adjust the position of the third driving mechanism on the third slide to clamp the middle tube. When the third driving mechanism on the third slide clamps the middle tube, the middle tube and the upper fork are not in contact with each other. The first adjustment mechanism 440 is adjusted to tilt the middle tube toward the upper fork until the middle tube and the upper fork are in contact. This adapts to the fixing requirements of middle tubes of different specifications and meets the precision requirements of robot welding.

[0098] The first adjustment mechanism 440 includes a first bracket 441, a first screw 442, a first manual wheel 443 and a first adjustment block 444. The first bracket 441 is fixedly connected to the second frame 401. The first bracket 441 is provided with a first screw 442. The first adjustment block 444 is screwed to the first screw 442. One end of the first screw 442 is fixedly connected to the first manual wheel 443.

[0099] The second adjustment mechanism 450 includes a second bracket 451, a second screw 452, a second manual wheel 453, and a second adjustment block 454. The second bracket 451 is fixedly connected to the first adjustment block 444. The second bracket 451 is provided with a second screw 452. The second adjustment block 454 is screwed to the second screw 452. One end of the second screw 452 is fixedly connected to the second manual wheel 453. The lower end of the second bracket 451 is rotatably mounted on the first driving mechanism.

[0100] The second bracket 451 is provided with a sliding groove along its height direction, the third slide plate 431 is slidably arranged in the sliding groove of the second bracket and the third slide plate 431 is fixedly connected to the second adjusting block 454, and the third slide plate 431 is also provided with a middle tube stopper 434; the first screw rod 442 forms an angle greater than 90° with the installed lower fork. When the middle tube and the upper fork are not in contact with each other, the first manual wheel 443 is rotated to drive the first screw rod 442 to rotate. The first screw rod 442 uses a thread to make the first adjusting block 444 slide obliquely along the first screw rod 442. Because the lower end of the second bracket is sleeved on the first driving mechanism, when the first adjusting block slides, it can drive the second bracket to rotate around the first driving mechanism, so that the middle tube fixed on the second bracket is tilted and fits against the upper fork. The middle tube stopper 434 facilitates quick positioning of the middle tube.

[0101] The third drive mechanism comprises a third drive cylinder 432, the piston rod of which is fixedly provided with a third pressure block 433. The second screw rod 452 is arranged parallel to the central tube, and the third drive cylinder 432 and the second screw rod 452 are arranged parallel to each other, ensuring that the inclination angle of the third drive cylinder 432 is consistent with the inclination angle of the central tube, and the third drive cylinder and the central tube are always aligned. When the second manual wheel 453 is rotated, the second screw rod 452 drives the second adjustment block 454, the third slide 431, the central tube stopper 434, and the third drive cylinder 432 to slide along the second screw rod, causing the third pressure block 343 on the third drive cylinder to press against the upper end of the central tube 502. When the distance between the central tube 502 and the third drive cylinder 432 exceeds the stroke of the third drive cylinder piston rod, the second adjustment mechanism 450 shortens the distance between the two, facilitating the third drive cylinder 432 securing the central tube 502.

[0102] A welding process for an automated welding die for an aluminum alloy vehicle frame comprises the following steps:

[0103] Step 1: Place the lower fork 505, the dropout 503, and the support rod 506 in the first welding mechanism 200, and align the lower fork 505 and the dropout 503 at the locations to be welded, and align the lower fork 505 and the support rod 506 at the locations to be welded, and weld the above-mentioned locations using the robot 101 to form the lower fork frame;

[0104] Step 2: Place the upper fork 504 and the other support rod 506 in the second welding mechanism 300, and align the upper fork 504 and the support rod 506 at the to-be-welded portion, and weld the to-be-welded portion using the robot 101 to form the upper fork frame;

[0105] Step 3: Place the front triangle, the lower fork frame welded in step 1, and the upper fork frame welded in step 2 in the third welding mechanism 400, and align the welded portions of the upper fork 504 and the dropout 503, the bottom bracket 501 and the lower fork 505, and the upper fork 504 and the center tube 502. Use the robot 101 to weld the welded portions to form a complete vehicle frame.

[0106] Furthermore, the specific steps of step one are as follows:

[0107] Step 1a: Select a suitable first hook positioning inner wide mold 211 and fix the first hook positioning inner wide mold 211 on the support plate 204. At the same time, place the hook 503 to be welded on the first hook positioning inner wide mold 211 and fix the hook 503 with the first clamping member 212.

[0108] Step 1b: Select a suitable first pipe profiling block 221 and install it on the first slide 222. Place the lower fork 505 and the support rod 506 in the profiling groove of the first pipe profiling block 221. Adjust the height of the first support block 224 so that the first support block supports the lower fork 505. Use the support rod pressing mechanism to press the support rod. The lower fork and the support rod are in contact with each other at the part to be welded.

[0109] Step 1c: Adjust the second clamping member 232. Under the action of the second clamping member 232, the first slide 222 slides toward the dropout 503 until the lower fork 505 is in contact with the dropout 503. The position of the first slide 222 is fixed using a positioning bolt. Finally, the robot 101 calls out the corresponding welding program to weld the connection between the lower fork and the dropout and the contact between the lower fork and the support rod to form the lower fork frame.

[0110] Furthermore, the specific steps in step 2 are as follows:

[0111] Step 2a: Select a suitable second hook positioning inner wide mold 311, place the second hook positioning inner wide mold 311 on the second base 301, and clamp the second hook positioning inner wide mold 311 with the second fastener 313. At the same time, place the hook on the second hook positioning inner wide mold 311 and fix the hook with the first fastener 312.

[0112] Step 2b: Select a suitable second pipe profiling block 321 and install it on the second slide 322. Place the upper fork 504 and the support rod 506 in the upper fork profiling groove and the support rod profiling groove respectively. At this time, the upper fork and the support rod to be welded are in contact with each other. Adjust the height of the second support block 324 so that the second support block supports the upper fork 504.

[0113] Step 2c: Adjust the third fastener 332 . Under the action of the third fastener 332 , the second slide plate 322 slides toward the dropout 503 until the upper fork 504 fits against the dropout 503 . Use the positioning bolt to fix the position of the second slide plate 322 .

[0114] Step 2d: Pull out the clamping piece 326 toward the support rod so that it is pressed onto the support rod 506. Adjust the clamping plate 328 to a suitable position and press the clamping plate 328 downward so that the clamping plate is pressed onto the upper fork 504. At the same time, the upper end of the locking piece 329 protrudes from the connecting plate. Rotate the locking piece 329 90° so that the upper end of the locking piece presses the connecting plate 327, and locks the clamping plate 328. Finally, use the robot 101 to call out the corresponding welding program to weld the upper fork 504 and the support rod 506 to form the upper fork frame.

[0115] Furthermore, the specific steps in step three are as follows:

[0116] Step 3a: Select a suitable lower fork fixing shaped block 402, upper fork fixing pressing block 403 and third dropout positioning inner wide mold 422 and fix them on the second frame 401;

[0117] Step 3b: Place the lower fork 505 on the lower fork frame in the lower fork fixing profiling block 402, and place the hook 503 on the lower fork frame on the third hook positioning inner wide mold 422, and simultaneously activate the two second driving cylinders 423 so that the second driving cylinders 423 fix the hook 503;

[0118] Step 3c: Place the upper fork 504 of the upper fork frame in the upper fork fixing block 403, and make the lower end of the upper fork 504 fit on the dropout 503. The contact point between the upper fork 504 and the dropout 503 is the first welding point.

[0119] Step 3d: Place the front tripod on the third support block 411 and use the first driving cylinders 412 on both sides of the tripod to clamp the bottom bracket 501. At this time, the bottom bracket 501 is in contact with the chain stay, which is the second welding point.

[0120] Step 3e: If the distance between the third driving cylinder and the middle tube exceeds the stroke of the piston rod of the third driving cylinder, adjust the second manual wheel 453 so that the third driving cylinder 432 is close to the middle tube 502, and finally use the third driving cylinder to press against the upper end of the middle tube;

[0121] Step 3f: Adjust the first manual wheel 443 as needed to rotate the second bracket around the bottom bracket, causing the middle tube 502 on the bracket to tilt and fit onto the upper fork 504. The joint between the upper fork and the middle tube is the third welding point.

[0122] Step 3g: At this point, the bottom bracket 501, the center bracket 502, the dropouts 503, the upper fork 504 and the chain stay 505 are all fixed. Finally, the robot 101 calls out the corresponding welding program to weld the three welded parts to form the complete vehicle frame.

[0123] It should be noted that those skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

Claims

1. An automated welding die for an aluminum alloy vehicle frame, characterized by: The invention comprises a base (100), on which a robot (101), a first welding mechanism (200), a second welding mechanism (300) and a third welding mechanism (400) are arranged. The robot (101) uses a long-neck welding gun. The first welding mechanism (200) comprises a first hook fixing mechanism (210) for fixing a hook (503), a lower fork fixing mechanism (220) for fixing a lower fork (505) and a clamping mechanism (230). The clamping mechanism (230) is used to push the lower fork fixing mechanism (220) so that the lower fork on the lower fork fixing mechanism is fixed. (505) and the hook (503) on the first hook fixing mechanism (210) are fitted together to facilitate welding by the robot (101); the lower fork fixing mechanism (220) includes a first pipe profiling block (221) for placing the lower fork (505) and a support rod pressing mechanism, and the first pipe profiling block (221) is also provided with a support rod profiling groove for placing the support rod (506); the first welding mechanism (200) is used to fix the lower fork (505), the hook (503) and the support rod (506), and the robot is used to weld them into one body to form a lower fork frame; The second welding mechanism (300) comprises a second hook fixing mechanism (310) for fixing the hook, an upper fork and support rod fixing mechanism (320) for fixing the upper fork (504) and the support rod (506), and a fastening mechanism (330), wherein the fastening mechanism (330) is used to push the upper fork and support rod fixing mechanism (320) so that the upper fork (504) on the upper fork and support rod fixing mechanism (320) and the hook (503) on the second hook fixing mechanism (310) are fitted to each other; the upper fork (504) and the support rod (506) are fixed by the second welding mechanism (300), and are welded into one body by a robot to form an upper fork frame; The third welding mechanism (400) comprises a lower fork fixing shaped block (402) for fixing a lower fork (505), an upper fork fixing pressure block (403) for fixing an upper fork (504), a five-way tube fixing mechanism (410) for fixing a five-way tube (501), a third hook fixing mechanism (420) for fixing a dropout (503), and a middle tube fixing mechanism (430) for fixing a middle tube (502); the front triangle, the welded lower fork frame, and the welded upper fork frame are placed in the third welding mechanism (400), and the upper fork (504) and the dropout (503), the five-way tube (501) and the lower fork (505), and the upper fork (504) and the middle tube (502) are fitted together at the locations to be welded, and the robot (101) is used to weld the above-mentioned locations to be welded to form a complete vehicle frame.

2. The aluminum alloy frame automated welding mold according to claim 1, characterized in that: The first welding mechanism (200) further comprises a first frame (201), a first base (202) being provided on the first frame (201), a workbench (203) being fixedly provided at the upper end of the first base (202), one side of the workbench (203) being fixedly connected to a support plate (204), the first hook fixing mechanism (210) being provided on the support plate (204), and the lower fork fixing mechanism (220) and the clamping mechanism (230) being provided on the workbench (203).

3. The aluminum alloy frame automated welding mold according to claim 2, characterized in that: The first hook claw fixing mechanism (210) comprises a first hook claw positioning inner wide mold (211) and first clamping members (212) respectively arranged on both sides of the first hook claw positioning inner wide mold (211), the first hook claw positioning inner wide mold (211) is used to place two hook claws (503), the first clamping member (212) is used to clamp and fix the hook claws (503), and the first clamping member (212) is a quick clamp; A backing plate (213) is fixedly installed on the support plate (204) between the first clamping member (212) and the first hook positioning inner wide mold (211), a clamping column (214) is horizontally installed in the backing plate (213) and the clamping column (214) can slide horizontally in the backing plate, and the quick clamp is connected to the clamping column and can push the clamping column (214) to clamp the hook (503).

4. The aluminum alloy frame automated welding mold according to claim 3, characterized in that: The workbench (203) is provided with a first slide (222) and two parallel first guide rails (205), the first slide (222) is slidably mounted on the first guide rails (205), the first pipe profiling block (221) is fixed on the first slide (222), and the first pipe profiling block (221) is provided with a lower fork profiling groove for placing the lower fork (505). A first strip plate (223) is fixedly mounted on both sides of the first slide plate (222), and a first support block (224) for supporting the lower fork (505) is provided on the first strip plate (223). The first support block (224) can be adjusted up and down relative to the first strip plate (223). The first strip plate (223) is provided with a slot, the lower end of the first support block (224) is inserted into the slot and fixed by a bolt, the first support block (224) is provided with a U-shaped groove matching the lower fork (505), the workbench (203) is provided with a plurality of insertion holes, the first slide plate (222) is provided with long holes corresponding to the insertion holes, and the first slide plate (222) is fixed by inserting positioning bolts into the long holes and the insertion holes respectively; The support rod clamping mechanism includes a pad column (225) and a clamping strip (226). The pad column (225) is provided with an oblong hole and a mounting hole. The pad column is fixed to the first slide plate (222) by being locked into the oblong hole by a bolt. The clamping strip (226) is horizontally inserted into the mounting hole and can move horizontally in the mounting hole. When fixed, the clamping strip (226) is pressed against the upper surface of the support rod (506).

5. The aluminum alloy frame automated welding mold according to claim 3, characterized in that: The clamping mechanism (230) is arranged on a workbench (203) on the other side of the lower fork fixing mechanism (220), and the clamping mechanism (230) comprises a clamping plate (231) and a second clamping member (232). The clamping plate (231) is located between the lower fork fixing mechanism (220) and the second clamping member (232). The second clamping member (232) is a quick clamp. The second clamping member (232) can push the clamping plate to fit the lower fork fixing mechanism and then push the lower fork (505) on the lower fork fixing mechanism (220) to fit the hook (503) on the first hook fixing mechanism. A mounting plate (233) is fixedly provided on the workbench (203), a quick clamp and a first cushion block (234) are fixedly provided on the mounting plate, a horizontally arranged slide groove is provided on the first cushion block, a slide rod (235) is installed in the slide groove, and one end of the slide rod (235) is fixedly connected to the clamping plate (231).

6. The aluminum alloy frame automated welding mold according to claim 1, characterized in that: The second welding mechanism (300) includes a second base (301), the second hook fixing mechanism (310), the upper fork and support rod fixing mechanism (320) and the fastening mechanism (330) are arranged on the second base, the second hook fixing mechanism (310) includes a second hook positioning inner wide mold (311) and first fasteners (312) respectively arranged on both sides of the second hook positioning inner wide mold (311), the second hook positioning inner wide mold (311) is used to place two hooks (503), the first fasteners (312) are used to clamp and fix the hooks (503 ... The support rod fixing mechanism (320) comprises a second pipe profiling block (321), an upper fork stabilizing mechanism and a support rod stabilizing mechanism. The second pipe profiling block (321) is provided with an upper fork profiling groove for accommodating an upper fork (504) and a support rod profiling groove for accommodating a support rod (506). The fastening mechanism (330) is used to push the second pipe profiling block (321) so that the upper fork (504) and the hook (503) fit together. The upper fork stabilizing mechanism is used to compress the upper fork (504) in the second pipe profiling block. The support rod stabilizing mechanism is used to compress the support rod (506) in the second pipe profiling block. The second hook fixing mechanism (310) further includes a second fastener (313), the second hook positioning inner wide mold (311) is fixed to the second base (301) via the second fastener (313), the first fastener (312) is an adjusting nut, a screw is provided in the second hook positioning inner wide mold (311), and an adjusting nut is respectively provided at both ends of the screw.

7. The aluminum alloy frame automated welding mold according to claim 6, characterized in that: A second slide plate (322) and two parallel second guide rails (302) are provided on the second base (301); the second slide plate (322) is slidably mounted on the second guide rails (302); and the second pipe profiling block (321) is fixed on the second slide plate (322); A second strip plate (323) is fixedly installed on both sides of the second slide plate (322), and a second support block (324) for supporting the upper fork (504) is provided on the second strip plate (323). The second support block (324) can be adjusted up and down relative to the second strip plate (323). A slot is provided on the second strip plate (323), and the lower end of the second support block (324) is inserted into the slot and fixed by bolts. The second support block (324) is provided with a U-shaped groove matching the upper fork (504), and the second base (301) is provided with a plurality of sockets. The second slide plate (322) is provided with a first oblong hole corresponding to the socket, and the second slide plate (322) is fixed by inserting a positioning bolt into the first oblong hole and the socket respectively.

8. The aluminum alloy frame automated welding mold according to claim 7, characterized in that: The support rod stabilizing mechanism includes a second pad (325) and a pressing member (326). The second pad (325) is provided with a second oblong hole and a mounting hole. The second pad is fixed to the second slide plate (322) by being locked into the second oblong hole by a bolt. The pressing member (326) is horizontally inserted into the mounting hole and can move horizontally in the mounting hole. When fixed, the pressing member (326) is pressed against the upper surface of the support rod (506).

9. The aluminum alloy frame automated welding mold according to claim 6, characterized in that: The fastening mechanism (330) includes a fastening plate (331) and a third fastening member (332); the fastening plate (331) is located between the upper fork and support rod fixing mechanism (320) and the third fastening member (332); the third fastening member (332) is a quick clamp, and the quick clamp can push the fastening plate (331) to fit the upper fork and support rod fixing mechanism (320), thereby making the upper fork (504) fit the hook (503); The upper fork stabilizing mechanism includes a connecting plate (327), a pressing plate (328) and a locking member (329), wherein the locking member (329) is placed in the fastening plate (331), one end of the connecting plate (327) is fixedly connected to the pressing plate (328), the upper end of the locking member (329) is inserted into the third oblong hole at the other end of the connecting plate, and the lower end thereof is connected to a spring.

10. The aluminum alloy frame automated welding mold according to claim 1, characterized in that: The third welding mechanism (400) further comprises a second frame (401), the lower fork fixing profiling block (402), the upper fork fixing pressure block (403), the bottom bracket fixing mechanism (410), the third hook fixing mechanism (420) and the middle bracket fixing mechanism (430) are arranged on the second frame (401), the bottom bracket fixing mechanism (410) comprises a third support block (411) and a first driving mechanism located on both sides of the third support block (411), the first driving mechanism being used to clamp the bottom bracket. The tube (501) is provided with a third hook fixing mechanism (420), comprising a third hook positioning inner width mold (422) and a second driving mechanism located on both sides of the third hook positioning inner width mold, wherein the third hook positioning inner width mold (422) is used to place the hook (503) and clamp the hook through the second driving mechanism, and the middle tube fixing mechanism (430) comprises a third slide plate (431) and a third driving mechanism fixed on the third slide plate, wherein the third driving mechanism is used to fix the middle tube (502).

11. The aluminum alloy frame automated welding mold according to claim 10, characterized in that: The third support block (411) is fixed on the second frame (401); the first driving mechanism is a first driving cylinder (412); the first driving cylinder (412) is horizontally fixed on the third support block (411); and the piston rod of the first driving cylinder (412) is fixedly connected to the first pressing block (413); The second driving mechanism is a second driving cylinder (423); the third hook positioning inner wide mold (422) is fixed to the second frame (401) through a fourth support block (421); the second driving cylinder (423) is located on the fourth support blocks (421) on both sides of the third hook positioning inner wide mold (422); and the piston rod of the second driving cylinder (423) is fixedly connected to the second pressing block.

12. The aluminum alloy frame automated welding mold according to claim 10, characterized in that: The second frame (401) is further provided with a first adjustment mechanism (440) and a second adjustment mechanism (450), wherein the first adjustment mechanism (440) is connected to the second frame (401), and the second adjustment mechanism (450) is connected to the first adjustment mechanism (440), and the third slide plate (431) is slidably provided on the second adjustment mechanism (450), and the second adjustment mechanism (450) can drive the third slide plate (431) to slide, and the first adjustment mechanism (440) can drive the second adjustment mechanism (450) and the third slide plate (431) to rotate simultaneously.

13. The aluminum alloy frame automated welding mold according to claim 12, characterized in that: The first adjustment mechanism (440) comprises a first bracket (441), a first screw (442), a first manual wheel (443) and a first adjustment block (444); the first bracket (441) is fixedly connected to the second frame (401); a first screw (442) is provided on the first bracket (441); the first adjustment block (444) is screwed to the first screw (442); and one end of the first screw (442) is fixedly connected to the first manual wheel (443).

14. The aluminum alloy frame automated welding mold according to claim 13, characterized in that: The second adjustment mechanism (450) comprises a second bracket (451), a second screw (452), a second manual wheel (453) and a second adjustment block (454); the second bracket (451) is fixedly connected to the first adjustment block (444); the second bracket (451) is provided with a second screw (452); the second adjustment block (454) is screwed to the second screw (452); one end of the second screw (452) is fixedly connected to the second manual wheel (453); the lower end of the second bracket (451) is rotatably sleeved on the first driving mechanism; The second bracket (451) is provided with a sliding groove along its height direction, the third slide plate (431) is slidably arranged in the sliding groove of the second bracket and the third slide plate (431) is fixedly connected to the second adjustment block (454), and the third slide plate (431) is also provided with a middle tube stopper (434); The third driving mechanism is a third driving cylinder (432), and a third pressing block (433) is fixedly provided on the piston rod of the third driving cylinder (432).

15. A welding process using the automated welding mold for an aluminum alloy vehicle frame according to any one of claims 1 to 14, characterized in that: The steps include: Step 1: placing the lower fork (505), the hook (503) and the support rod (506) in the first welding mechanism (200), and making the lower fork (505) and the hook (503) to be welded fit together, and the lower fork (505) and the support rod (506) to be welded fit together, and using the robot (101) to weld the above-mentioned welded parts to form a lower fork frame; Step 2: placing the upper fork (504) and the other support rod (506) in the second welding mechanism (300), and making the upper fork (504) and the support rod (506) to be welded fit together, and using the robot (101) to weld the above-mentioned welded parts to form the upper fork frame; Step 3: The front triangle, the lower fork frame welded in step 1 and the upper fork frame welded in step 2 are placed in a third welding mechanism (400), and the upper fork (504) and the dropout (503), the five-way tube (501) and the lower fork (505), and the upper fork (504) and the middle tube (502) are aligned with each other at the places to be welded, and the robot (101) is used to weld the places to be welded to form a complete vehicle frame.

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