Auxiliary welding system and auxiliary welding method

Abstract

The present invention belongs to the field of positioning and clamping, and discloses an auxiliary welding system and an auxiliary welding method, wherein the system includes: a traveling tool, including a tool platform for carrying a workpiece to be welded and a tool positioning and clamping assembly arranged on the tool platform and used for positioning and clamping the workpiece to be welded; and a welding positioner, including a flipping device, a rotary platform connected to the flipping device, and a positioner external device arranged on the rotary platform, the positioner external device including a device platform for carrying the traveling tool and a device positioning and clamping assembly arranged on the device platform and used for positioning and clamping the traveling tool. By adopting the present invention, the welding efficiency of the workpiece can be improved, the safety risk can be reduced, the steel plate material can be saved, the welding difficulty can be reduced, the surface quality and welding quality of the workpiece can be guaranteed, and it is beneficial for the subsequent process to perform automated production and automatic logistics on the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning and clamping, and in particular to an auxiliary welding system and an auxiliary welding method. Background Art

[0002] The production process of existing pump truck chassis mainly includes assembly, welding, and sleeve installation. The assembly process mainly involves arranging the chassis components and welding the inner welds of the chassis. The welding process is the welding of the outer welds of the chassis. The sleeve installation process is the positioning and welding of the chassis sleeve, as well as the positioning and welding of the sleeve to the cover plate and panel.

[0003] During the welding process, operators need to use auxiliary tooling such as ladders to weld the welds on each side of the chassis. Since each welding must be performed flat, the chassis needs to be flanged multiple times through manual crane control during the welding process so that each weld of the chassis is in a flat welding position during welding.

[0004] However, the underframe is a large, heavy structural component. Current flanging methods are difficult, inefficient, and pose high safety risks. During the flanging process, steel plates must be laid on the factory floor to prevent damage, which wastes materials. Direct contact between the underframe and the steel plates can easily damage the underframe surface. Furthermore, because the underframe cannot be positioned in any desired position, some welds cannot be optimally positioned, making welding difficult and arbitrary, and preventing quality assurance. Summary of the Invention

[0005] In response to at least one of the above-mentioned defects or shortcomings of the prior art, the present invention provides an auxiliary welding system and an auxiliary welding method, which do not require manual participation in the workpiece flanging action when welding large and heavy workpieces, and do not require laying steel plates on the factory floor. The welds of the workpieces can be placed in the optimal welding position, so as to achieve the purposes of improving welding efficiency, reducing safety risks, saving steel plate materials, reducing welding difficulty, and ensuring the surface quality of the workpiece and the welding quality.

[0006] To achieve the above objectives, the present invention provides an auxiliary welding system in a first aspect, comprising:

[0007] The accompanying tooling includes a tooling platform for carrying the workpiece to be welded and a tooling positioning and clamping assembly provided on the tooling platform and used for positioning and clamping the workpiece to be welded; and

[0008] The welding positioner includes a flipping device, a rotary platform connected to the flipping device, and an external positioner device arranged on the rotary platform. The external positioner device includes a device platform for carrying the accompanying tooling and a device positioning and clamping assembly arranged on the device platform and used for positioning and clamping the accompanying tooling.

[0009] Optionally, a tooling external plate is provided at the middle position of the bottom surface of the tooling platform, and a device support structure for supporting the tooling external plate is provided at the middle position of the device platform. When the device positioning and clamping assembly positions and clamps the accompanying tooling, the center of the tooling external plate, the center of the device support structure and the rotation center of the rotating platform are collinearly arranged.

[0010] Optionally, the device support structure includes a plurality of universal ball assemblies arranged in a ring shape for jointly supporting the tooling external plate.

[0011] Optionally, the device positioning and clamping assembly includes a plurality of device edge pressing positioning mechanisms arranged in sequence around the device support structure on the device platform, and the edge pressing positioning ends of the plurality of device edge pressing positioning mechanisms can respectively form an inclined pressing connection with the plate edge of the tooling external plate.

[0012] Optionally, a plurality of plate edge crimping blocks are provided on the plate edge of the tooling external connection plate, which are arranged in sequence and spaced around the plate edge and are used to form the inclined surface crimping in a one-to-one correspondence with the plurality of the edge crimping positioning ends.

[0013] Optionally, an anti-collision buffer block is provided on the top of each of the edge pressing positioning ends.

[0014] Optionally, part of the device's edge pressing positioning mechanism is formed as a pushing mechanism, and the pushing mechanism includes a first telescopic device, a first guide structure, a first floating member and a pushing and crimping block, the first guide structure forms a first guide channel, one end of the pushing and crimping block can be slidably extended into the first guide channel and the other end is formed as the edge pressing positioning end, the first telescopic device includes a first telescopic rod, the first floating member is arranged in the first guide channel and the two ends are respectively connected to the first telescopic rod and the pushing and crimping block.

[0015] Optionally, the push crimping block is formed with a crimping block locking hole, and the positioner external device includes a crimping block locking mechanism arranged on the device platform, and the crimping block locking mechanism includes a second telescopic device, a second guide structure and a locking rod, the second telescopic device includes a second telescopic rod, and the second guide structure is formed with a second guide channel, and the locking rod is movably inserted into the second guide channel. Under the drive of the second telescopic rod, the locking rod can partially extend out of the second guide channel and pass through the crimping block locking hole, so that the push crimping block is locked.

[0016] Optionally, the crimping block locking mechanism includes a second floating member, which is arranged in the second guide channel and has two ends respectively connected to the second telescopic rod and the locking rod.

[0017] Optionally, the positioner external device includes:

[0018] A travel switch is provided in the middle of the device platform and is used to send a positioning and clamping trigger signal when the tooling external plate is supported on the device support structure;

[0019] The controller communicates with the travel switch and the device positioning and clamping assembly respectively. The controller is configured to control the device positioning and clamping assembly to perform a positioning and clamping action on the tooling external plate when receiving the positioning and clamping trigger signal.

[0020] Optionally, the external device of the positioner includes two device guide fixtures arranged in parallel and spaced apart on the device platform, and the accompanying tooling includes a tooling guide structure arranged at the edge of the tooling platform. In the process of placing the accompanying tooling on the device platform, the tooling guide structure can be limited between the two device guide fixtures to pre-position the accompanying tooling.

[0021] A second aspect of the present invention provides an auxiliary welding method, which is performed by using the above-mentioned auxiliary welding system and includes:

[0022] Positioning and clamping the workpiece to be welded by the accompanying tooling;

[0023] Positioning and clamping the accompanying tooling by means of the external device of the positioner;

[0024] During welding, the spatial position of the workpiece to be welded is adjusted by the welding positioner.

[0025] With this technical solution, before welding a large, heavy workpiece, the workpiece to be welded is first placed on the tooling platform of the mobile tooling and positioned and clamped using the tooling positioning and clamping assembly. The mobile tooling with the workpiece is then placed on the mounting platform of the positioner's external device and positioned and clamped using the device positioning and clamping assembly, thereby positioning the workpiece on the welding positioner. During welding, the workpiece is flipped and rotated by the welding positioner's tilting mechanism and rotary platform, eliminating the need for manual flanging. This reduces the complexity and safety risks, and improves welding efficiency. Flanging eliminates the need for laying steel plate on the factory floor, conserving steel material, preventing damage to the workpiece surface, and ensuring surface quality. Furthermore, each weld seam on the workpiece is positioned in the optimal welding position, ensuring weld quality and achieving high weld consistency for batches of workpieces. The mobile tooling can be transported along with the workpiece for subsequent processing steps, facilitating precise positioning and facilitating automated production and logistics.

[0026] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 A schematic diagram of an auxiliary welding system in a specific embodiment of the present invention;

[0029] Figure 2 for Figure 1 A top view of the positioner external device;

[0030] Figure 3 for Figure 2 A side view of the positioner external device;

[0031] Figure 4 for Figure 2 A top view of the universal ball transfer assembly;

[0032] Figure 5 for Figure 4 A side view of the universal ball transfer assembly;

[0033] Figure 6 for Figure 2 A top view of the push mechanism in FIG.

[0034] Figure 7 for Figure 6 A side sectional view of the pushing mechanism in FIG.

[0035] Figure 8 for Figure 2 A top view of the crimping block locking mechanism;

[0036] Figure 9 for Figure 8 A side sectional view of the crimping block locking mechanism;

[0037] Figure 10 for Figure 2 A top view of the reference mechanism in FIG.

[0038] Figure 11 for Figure 10 A side sectional view of the reference mechanism in FIG.

[0039] Figure 12 for Figure 11 A side sectional view of the reference crimping block in FIG.

[0040] Figure 13 for Figure 12 A three-dimensional view of the reference crimping block in FIG.

[0041] Figure 14 for Figure 2 A side view of the device guide fixture in FIG.

[0042] Figure 15 for Figure 1 Schematic diagram of the accompanying tooling in;

[0043] Figure 16 for Figure 15 A top view of the accompanying tooling in FIG;

[0044] Figure 17 for Figure 15 A side view of the accompanying tooling;

[0045] Figures 18 to 21 They are Figure 15 Schematic diagram of different chassis peripheral wall pressing mechanisms;

[0046] Figures 22 to 24 They are Figure 15 Schematic diagram of different chassis top wall pressing mechanisms;

[0047] Figure 25 The figure is a top view of an existing pump truck chassis to be welded.

[0048] Description of reference numerals:

[0049] 100 portable tooling

[0050] 11 Tooling platform 12 Base frame wall pressing mechanism

[0051] 13. Base frame top wall pressing mechanism 14. Tool guide structure

[0052] 15 Tooling external board 16 Board edge crimping block

[0053] 121 Mounting base 122 Horizontal screw

[0054] 123 Transverse drive handle 124 Transverse press fitting

[0055] 125 Transverse guide rod 126 Transverse guide seat

[0056] 127 stopper 131 vertically penetrates the socket body

[0057] 132 Vertical screw 133 Vertical drive handle

[0058] 134 vertical crimping piece 135 crimping piece pressing block

[0059] 200 welding positioner

[0060] 21 Positioner external device 22 Rotary platform

[0061] 23 Flipping device

[0062] 211 Device Platform 212 Universal Ball Assembly

[0063] 213 Pushing mechanism 214 Pressing block locking mechanism

[0064] 215 Reference mechanism 216 Anti-collision buffer block

[0065] 217 Limit switch 218 Device guide fixture

[0066] 212a sphere 212b sphere support

[0067] 213a First telescopic rod 213b First guide structure

[0068] 213c First floating member 213d Pushing the crimping block

[0069] 213e Pressing block locking hole 214a Second telescopic rod

[0070] 214b Second guide structure 214c Second floating member

[0071] 214d Locking rod 215a Third telescopic rod

[0072] 215b Third guide structure 215c Reference crimping block

[0073] 218a Clamp horizontal frame 218b Clamp vertical frame

[0074] 218c wear plate

[0075] 300 pump truck chassis to be welded

[0076] 31 Main hole of chassis 32 Bushing hole of chassis DETAILED DESCRIPTION

[0077] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not used to limit the embodiment of the present invention.

[0078] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0079] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used to describe the relative positional relationships of components in the directions shown in the drawings or in the vertical, perpendicular or gravity directions.

[0080] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0081] Reference Figure 1 、 Figure 2 and Figure 15 A first exemplary embodiment of the present invention provides an auxiliary welding system, which is particularly suitable for assisting the welding of large and heavy workpieces (such as pump truck chassis), and mainly includes a portable tooling 100 and a welding positioner 200.

[0082] Specifically, the portable tooling 100 includes a tooling platform 11 and a tooling positioning and clamping assembly. The tooling platform 11 is used to support the workpiece to be welded, and the tooling positioning and clamping assembly is installed on the tooling platform 11 and is used to position and clamp the workpiece to be welded. After the workpiece is welded, the portable tooling 100 and the workpiece can be transported to the subsequent process. In the subsequent process, the workpiece can be positioned by positioning the portable tooling 100.

[0083] The welding positioner 200 includes a turning device 23, a rotary platform 22 connected to the turning device 23, and a positioner external device 21 disposed on the rotary platform 22. The positioner external device 21 includes a device platform 211 and a device positioning and clamping assembly. The device platform 211 is used to carry the accompanying tooling 100. The device positioning and clamping assembly is disposed on the device platform 211 and is used to position and clamp the accompanying tooling 100.

[0084] Before welding a large and heavy workpiece, the workpiece to be welded is first placed on the tooling platform 11 of the accompanying tooling 100, and the workpiece is positioned and clamped by the tooling positioning and clamping assembly. Then, the accompanying tooling 100 with the workpiece is placed on the device platform 211 of the positioner external device 21, and the accompanying tooling 100 is positioned and clamped by the device positioning and clamping assembly, thereby realizing the positioning of the workpiece on the welding positioner 200. During welding, the turning and rotation of the workpiece can be realized accordingly through the action of the flipping device 23 and the rotary platform 22 of the welding positioner 200, and there is no need for manual participation in the workpiece flanging action. The flanging is easy, the safety risk is low, and the welding efficiency is improved. When flanging the workpiece, there is no need to lay steel plates on the factory floor, which saves steel plate materials, avoids damage to the workpiece surface, and ensures the surface quality of the workpiece. In addition, each weld of the workpiece can be in the optimal welding position, the welding quality is guaranteed, and the welding consistency is high for the welding of batch workpieces to be welded. For the subsequent processes of the workpiece, the accompanying tooling 100 can be transported together with the workpiece, laying the foundation for the precise positioning of the workpiece in the subsequent processes, which is conducive to the subsequent automated production and automatic logistics of the workpiece.

[0085] Reference Figure 16 and Figure 17 A tooling external plate 15 may be provided at the middle position of the bottom surface of the tooling platform 11, and a device support structure for supporting the tooling external plate 15 may be provided at the middle position of the device platform 211. When the device positioning and clamping assembly positions and clamps the accompanying tooling 100, the center of the tooling external plate 15, the center of the device support structure and the rotation center of the rotary platform 22 are collinearly arranged.

[0086] In this way, when the welding positioner 200 performs positioning actions such as flipping and / or rotation, it can ensure that the workpiece to be welded is firmly positioned on the welding positioner 200, especially when large and heavy workpieces such as the pump truck chassis (in practice, the total weight of the pump truck chassis and the accompanying tooling 100 is nearly 10 tons at most) are driven to shift, the rotational torque is small, which can ensure that the driving force of the welding positioner 200 is more stable.

[0087] Reference Figure 2 、 Figure 4 and Figure 5 The device support structure may include a plurality of universal ball assemblies 212 arranged in a ring for jointly supporting the tooling external plate 15. For example, the universal ball assembly 212 may include a ball 212a and a ball support 212b. The ball support 212b is fixedly connected to the device platform 211 and defines a support cavity for the ball 212a to move. The ball 212a partially extends from the top of the support cavity to support the tooling external plate 15.

[0088] When placing the portable tooling 100 on the device platform 211, the tooling external plate 15 is first roughly aligned with the device support structure, and then the device positioning and clamping assembly is used to position and clamp the portable tooling 100. During the positioning and clamping process, the movable mechanism in the device positioning and clamping assembly can drive the tooling external plate 15 to move on the multiple universal ball assemblies 212. Since the two form a rolling connection, the resistance encountered by the portable tooling 100 during movement and adjustment can be reduced. At the same time, because the multiple universal ball assemblies 212 are arranged in a ring shape, the portable tooling 100 always tends to move to a position where the center of the tooling external plate 15, the center of the device support structure, and the rotation center of the rotating platform 22 are collinear, ensuring the precise positioning of the portable tooling 100.

[0089] The specific structure of the device positioning and clamping assembly is not limited. For example, the device positioning and clamping assembly may include a plurality of device edge-pressing positioning mechanisms that are sequentially arranged around the device support structure on the device platform 211. The edge-pressing positioning ends of the plurality of device edge-pressing positioning mechanisms (e.g. Figure 2 Each of the push mechanisms 213 and the reference mechanisms 215 (pointing to one end of the plurality of universal ball assemblies 212 arranged in a ring) can form an oblique pressure contact with the edge of the tooling external plate 15. By forming this oblique pressure contact, the multiple device edge-pressing and positioning mechanisms can compress and compact the tooling external plate 15 with relatively small driving force, thereby positioning and clamping the entire portable tooling 100.

[0090] In one embodiment of forming the above-mentioned bevel crimping, refer to Figure 16 , the edge of the tooling external plate 15 is provided with a plurality of plate edge crimping blocks 16 which are arranged in sequence and spaced around the edge of the plate. Figure 6 、 Figure 7 、 Figure 10 and Figure 11 At this time, the edge pressing positioning ends of the multiple device edge pressing positioning mechanisms and the multiple plate edge pressing blocks 16 can form the above-mentioned inclined surface pressing in a one-to-one correspondence.

[0091] In another embodiment of forming the above-mentioned bevel crimping, the edge of the tooling external plate 15 is directly processed to have a bevel, including forming a circumferentially continuous bevel on the entire edge of the plate, or forming multiple local bevels on the edge of the plate at intervals along the circumferential direction.

[0092] Of course, the edge of the tooling external plate 15 can be crimped by the edge pressing positioning end of the device edge pressing positioning mechanism, and it can also be achieved without using the bevel pressing method, as long as it can ensure that the edge of the tooling external plate 15 can be pressed tightly.

[0093] In the process of placing the accompanying tool 100 on the device platform 211, the risk of the edge pressing positioning end of the device edge pressing positioning mechanism being bumped is relatively large. In order to prevent the device edge pressing positioning mechanism from being damaged, refer to Figure 6 、 Figure 7 、 Figure 10 and Figure 11 An anti-collision buffer block 216 can be set on the top of each edge pressing positioning end to form anti-collision protection for each edge pressing positioning end and improve the durability of the mechanism.

[0094] Reference Figure 2 、 Figure 6 and Figure 7 , part of the device's edge pressing and positioning mechanism can be formed as a pushing mechanism 213. Specifically, the pushing mechanism 213 includes a first telescopic device, a first guide structure 213b, a first floating member 213c and a pushing and crimping block 213d. The first guide structure 213b forms a first guide channel, one end of the pushing and crimping block 213d can be slidably extended into the first guide channel and the other end is formed as a edge pressing and positioning end. Combined with the above, the edge pressing and positioning end of the pushing and crimping block 213d can be formed with an inclined surface for forming an inclined surface crimping with the plate edge of the tooling external plate 15. The first telescopic device can be an electric cylinder, an air cylinder, a hydraulic cylinder, a linear motor, etc., which includes a first telescopic rod 213a that can be linearly telescopically moved. The first floating member 213c is arranged in the first guide channel and its two ends are respectively connected to the first telescopic rod 213a and the push-pressing block 213d. For example, one end of the first floating member 213c is sleeved on the first telescopic rod 213a and the other end is hinged to the push-pressing block 213d, thereby forming a floating connection.

[0095] When the first telescopic mechanism drives the first telescopic rod 213a outward, the first telescopic rod 213a, through the first floating member 213c, pushes the pressing block 213d to apply pressure to the edge of the tooling external plate 15. Simultaneously, as the pallet 100 is pushed, the reaction force applied to the pushing mechanism 213 is significant, causing the first telescopic rod 213a to deviate from the axis of the first telescopic mechanism and become stuck, potentially damaging the inner wall of the cylinder. However, the first floating member 213c, through its adaptive displacement, offsets the adverse effect of the pallet 100's reaction force on the linear movement of the first telescopic rod 213a, thereby protecting the first telescopic mechanism.

[0096] In order to enhance the positioning and clamping effect of the accompanying tool 100 and improve stability and reliability, the pressing block 213d can be formed with a pressing block locking hole 213e. Figure 2 、 Figure 8 and Figure 9The external device 21 of the positioner may include a crimping block locking mechanism 214 provided on the device platform 211, and the crimping block locking mechanism 214 includes a second telescopic device, a second guide structure 214b and a locking rod 214d. The second telescopic device may be an electric cylinder, a pneumatic cylinder, a hydraulic cylinder, a linear motor, etc., which includes a second telescopic rod 214a capable of linear telescopic movement, the second guide structure 214b forms a second guide channel, and the locking rod 214d is movably inserted into the second guide channel. After completing the positioning and clamping of the accompanying tool 100, the second telescopic rod 214a is driven to extend outward by the second telescopic device, and the locking rod 214d can partially extend out of the second guide channel and pass through the crimping block locking hole 213e, so that the crimping block 213d is locked, that is, the crimping block 213d is mechanically locked. At this time, even if the power of the pushing mechanism 213 fails, the pushing and pressing block 213 d can be maintained at a position where it firmly presses the tooling external plate 15 .

[0097] The locking rod 214d may encounter a certain amount of penetration resistance during the process of penetrating the crimping block locking hole 213e, which may cause the second telescopic rod 214a to deviate from the axis of the second telescopic device and become stuck, and may also cause damage to the inner wall of the cylinder. To solve this problem, a second floating member 214c can also be provided in the crimping block locking mechanism 214. The second floating member 214c is specifically provided in the second guide channel and has its two ends connected to the second telescopic rod 214a and the locking rod 214d, respectively. In this way, the adaptive displacement of the second floating member 214c can offset the adverse effect of the penetration resistance of the locking rod 214d on the linear movement of the second telescopic rod 214a, thereby protecting the second telescopic device.

[0098] Reference Figure 2 、 Figure 10 and Figure 11 The edge-pressing and positioning mechanism of part of the device can be formed as a reference mechanism 215, which includes a third telescopic device, a third guide structure 215b, and a reference crimping block 215c. The third telescopic device can be an electric cylinder, a pneumatic cylinder, a hydraulic cylinder, a linear motor, etc., and includes a third telescopic rod 215a capable of linear telescopic movement. The third guide structure 215b forms a third guide channel. One end of the third telescopic rod 215a passes through the third guide channel and connects to the reference crimping block 215c. The reference crimping block 215c forms a crimping and positioning end for crimping the edge of the tooling external plate 15.

[0099] It should be noted that while the reference mechanism 215 and the push mechanism 213 both have telescopic functions, they produce different effects when positioning and clamping the portable tooling 100. The reference mechanism 215 actually provides a pre-positioning reference for the tooling external plate 15. Before placing the portable tooling 100 on the device platform 211, the position of the reference crimping block 215c needs to be pre-adjusted. During the positioning and clamping process of the portable tooling 100, the reference crimping block 215c remains stationary. The push mechanism 213, on the other hand, is different. During the positioning and clamping process of the portable tooling 100, the push mechanism 213 needs to push the portable tooling 100 so that the tooling external plate 15 is crimped onto the reference crimping block 215c.

[0100] Below is Figure 2 The arrangement and orientation of the four push mechanisms 213 and the four reference mechanisms 215 in the embodiment are used as an example to explain an optional positioning and clamping method for the portable tooling 100. However, the actual execution steps are not limited thereto.

[0101] Specifically, the two left-side push mechanisms 213 are first used to push the accompanying tool 100 rightward until the right edge of the tooling external plate 15 is pressed against the two right-side reference press blocks 215c. The lower press block locking mechanism 214 is then used to mechanically lock the lower left push press block 213d, thereby completing the left-right positioning and clamping of the tooling external plate 15.

[0102] Next, the two upper push mechanisms 213 push the portable tooling 100 downward until the lower edge of the tooling external plate 15 is pressed against the two lower reference crimping blocks 215c. The upper crimping block locking mechanism 214 then mechanically locks the upper left push crimping block 213d, completing the vertical positioning and clamping of the tooling external plate 15. This completes the entire clamping of the portable tooling 100.

[0103] Reference Figure 12 and Figure 13 The reference crimping block 215c can be configured as shown in the figure. The angle between the upper inclined surface of the edge-pressing positioning end of the reference crimping block 215c and the vertical direction can be set to 15° or other angles, and the angle between the lower inclined surface and the vertical direction can be set to 30° or other angles. The lower inclined surface is used to form an inclined crimping connection with the inclined surface of the plate edge crimping block 16. The upper inclined surface is designed to match the size of the anti-collision buffer block 216 for installation, preventing the reference crimping block 215c from colliding when the portable tooling 100 is installed on the platform 211. Of course, the shape of the push crimping block 213d can also be configured accordingly.

[0104] In order to improve the automation and intelligence of the positioning and clamping of the accompanying tooling 100, a travel switch 217 and a controller may also be provided in the positioner external device 21.

[0105] Reference Figure 2 The limit switch 217 is located in the middle of the device platform 211 and is used to issue a positioning and clamping trigger signal when the tooling external plate 15 is supported on the device support structure. The controller communicates with the limit switch 217 and the device positioning and clamping assembly respectively. The controller is configured to control the device positioning and clamping assembly to perform positioning and clamping operations on the tooling external plate 15 upon receiving the positioning and clamping trigger signal. Furthermore, the controller can also be configured to control the crimping block locking mechanism 214 to automatically perform mechanical locking of the push crimping block 213d, eliminating the need for human intervention in the entire positioning and clamping process of the accompanying tooling 100.

[0106] By automating and intelligently positioning and clamping the portable tooling 100, positioning and clamping efficiency can be greatly improved, significantly reducing the time required for welding preparation. Especially for large and heavy portable tooling 100 and workpiece assemblies to be welded, the high level of automation and intelligence can significantly save manpower, reduce the difficulty of positioning and clamping, and improve the accuracy and success rate of positioning and clamping.

[0107] In addition, when placing the portable tooling 100 on the device platform 211 , how to quickly locate the alignment tooling external plate 15 and the device support structure is also one of the key factors in improving the positioning and clamping efficiency of the portable tooling 100 .

[0108] For example, the following embodiments can be used to quickly locate and align the tooling external plate 15 and the device support structure.

[0109] Reference Figure 2 、 Figure 3 、 Figure 14 and Figure 15 The positioner external device 21 includes two parallel, spaced-apart fixtures 218 mounted on the mounting platform 211. The portable tooling 100 includes a tooling guide structure 14 positioned at the edge of the tooling platform 11. When the portable tooling 100 is placed on the mounting platform 211, the tooling guide structure 14 can be positioned between the two fixtures 218, thereby pre-positioning the portable tooling 100 on the mounting platform 211.

[0110] Each device guide fixture 218 may include a fixture cross frame portion 218a and a fixture vertical frame portion 218b, one end of the fixture cross frame portion 218a is connected to the device platform 211 and the other end is connected to the fixture vertical frame portion 218b. When the tooling guide structure 14 is limited between the two device guide fixtures 218, that is, it is limited between the two fixture cross frame portions 218a, thereby preventing the accompanying tooling 100 from moving circumferentially on the device platform 211. In addition, the two fixture vertical frame portions 218b limit the lateral movement of the accompanying tooling 100. Preferably, when the outer periphery of the tooling platform 11 abuts against the two fixture vertical frame portions 218b, the tooling external plate 15 and the device support structure are roughly aligned, and it is only necessary to further position and clamp the tooling external plate 15 through the device positioning and clamping assembly. In order to extend the service life of the device guide fixture 218 , a wear-resistant plate 218 c may be provided on the fixture vertical frame portion 218 b so as to directly abut against the outer periphery of the tooling platform 11 .

[0111] A second exemplary embodiment of the present invention further provides an auxiliary welding method, which is performed by using the above-mentioned auxiliary welding system. The method specifically includes:

[0112] Step S1: Positioning and clamping the workpiece to be welded by the accompanying tool 100;

[0113] Step S2: Positioning and clamping the accompanying tool 100 by the positioner external device 21;

[0114] Step S3: During welding, the spatial position of the workpiece to be welded is adjusted by the welding positioner 200 .

[0115] The third exemplary embodiment of the present invention also provides a method for positioning and clamping Figure 25 The accompanying tool 100 for the pump truck chassis 300 to be welded (including the chassis main hole 31 and the chassis sleeve hole 32) mainly includes a tooling platform 11 and a tooling positioning and clamping assembly.

[0116] Specifically, the tooling platform 11 can be used to carry the pump truck chassis 300 to be welded, and refer to Figure 15 The tooling positioning and clamping assembly includes multiple chassis peripheral wall pressing mechanisms 12 and multiple chassis top wall pressing mechanisms 13. The multiple chassis peripheral wall pressing mechanisms 12 are sequentially spaced around the edge of the tooling platform 11 and are used to jointly press the peripheral walls of the chassis 300 of the front welding pump truck. The multiple chassis top wall pressing mechanisms 13 are spaced apart on the tooling platform 11 and are used to jointly press the top wall of the chassis 300 of the front welding pump truck.

[0117] Before welding the pump truck chassis, the pump truck chassis 300 to be welded is first placed on the tooling platform 11 of the accompanying tooling 100, and the chassis is positioned and clamped by jointly pressing the chassis walls through multiple chassis peripheral wall pressing mechanisms 12 and the chassis top wall pressing mechanisms 13. Then, the accompanying tooling 100 with the chassis is fixed on the welding positioner 200. During welding, the spatial position of the chassis can be adjusted through the action of the welding positioner, and there is no need for manual participation in the chassis flanging action. The flanging is easy, the safety risk is low, and the welding efficiency is improved. When flanging the chassis, there is no need to lay steel plates on the factory floor, which saves steel plate materials, avoids damage to the chassis surface, and ensures the surface quality of the chassis. In addition, each weld of the chassis can be in the optimal welding position, and the welding quality is guaranteed. For the welding of batches of pump truck chassis 300 to be welded, the welding consistency is high. For the subsequent processes of the chassis, the accompanying tooling 100 can be transported together with the chassis, laying the foundation for the precise positioning of the chassis in the subsequent processes, which is conducive to the subsequent automated production and automatic logistics of the chassis.

[0118] Several optional embodiments of the chassis peripheral wall pressing mechanism 12 are provided below.

[0119] Reference Figures 18 to 21 The chassis peripheral wall crimping mechanism 12 comprises at least a mounting base 121, a transverse screw 122, a transverse driving handle 123, and a transverse crimping member 124. The mounting base 121 is fixedly connected to the tooling platform 11, the transverse screw 122 passes through the mounting base 121 and is threadedly connected to the mounting base 121, one end of the transverse screw 122 is fixedly connected to the transverse crimping member 124, and the other end is fixedly connected to the transverse driving handle 123.

[0120] By rotating the transverse driving handle 123, the transverse screw 122 can be moved transversely by utilizing the threaded connection formed by the transverse screw 122 and the mounting base 121, thereby driving the transverse crimping piece 124 to move transversely according to the actual size of the pump truck chassis 300 to be welded, so that the transverse crimping piece 124 can be crimped against the surrounding wall of the chassis.

[0121] Further, refer to Figure 18 The chassis peripheral wall crimping mechanism 12 may include a transverse guide rod 125 that is laterally movable and extends through the mounting base 121. One end of the transverse guide rod 125 is fixedly connected to a transverse crimping member 124. When the transverse screw 122 drives the transverse crimping member 124 to move laterally, the transverse guide rod 125 can play a reinforcing guiding role, ensuring stable transverse movement of the transverse crimping member 124, avoiding the situation where the crimping surface of the transverse crimping member 124 is partially offset and unable to fully press and compact the chassis peripheral wall, thereby improving the reliability of positioning and clamping.

[0122] Furthermore, the chassis wall crimping mechanism 12 may include a stopper 127, which is fixedly connected to the mounting base 121 and extends over the transverse guide rod 125. With this structure, a product positioning line scale can be provided on the transverse guide rod 125. When a product positioning line is flush with the end surface of the stopper 127, it indicates that the transverse crimping member 124 is in a position suitable for crimping and positioning a corresponding size of the pump truck chassis 300 to be welded.

[0123] Reference Figure 19 The chassis peripheral wall crimping mechanism 12 may include a transverse guide seat 126 fixedly connected to the tooling platform 11. The transverse guide seat 126 is formed with a transverse guide slot extending transversely therethrough, and the transverse crimping member 124 forms a sliding engagement with the transverse guide slot. Similarly, during the transverse screw 122 driving the transverse crimping member 124 to move laterally, the transverse guide seat 126 can serve to enhance guidance, ensuring stable transverse movement of the transverse crimping member 124 and preventing the crimping surface of the transverse crimping member 124 from partially deviating and failing to fully press the chassis peripheral wall, thereby improving positioning and clamping reliability.

[0124] Furthermore, a product positioning line scale can be set on one of the transverse guide seat 126 and the transverse crimping piece 124, and a single product positioning line can be set on the other. When the single product positioning line is flush with a product positioning line in the product positioning line scale, it means that the position of the transverse crimping piece 124 at this time is suitable for crimping and positioning a corresponding size of the pump truck chassis 300 to be welded.

[0125] Several optional embodiments of the chassis top wall pressing mechanism 13 are provided below.

[0126] Reference Figures 22 to 24 The chassis top wall crimping mechanism 13 at least includes a vertical socket body 131, a vertical screw 132, a vertical drive handle 133, a vertical crimping piece 134, and a crimping piece pressing block 135. The vertical socket body 131 is fixedly connected to the tooling platform 11, the vertical screw 132 passes through the crimping piece pressing block 135, the vertical crimping piece 134, and the vertical socket body 131 in sequence from top to bottom, the crimping piece pressing block 135 is fixedly connected to the vertical screw 132, the vertical crimping piece 134 is slidably connected to the vertical screw 132, the vertical socket body 131 is threadedly connected to the vertical screw 132, and the vertical drive handle 133 is fixedly connected to the crimping piece pressing block 135.

[0127] In this embodiment, the vertical through-hole socket body 131 is provided for positioning the through-holes in the pump truck chassis 300 to be welded, and can also be considered to have a guiding and positioning function. When the pump truck chassis 300 to be welded needs to be placed on the tooling platform 11, the vertical drive handle 133 is first rotated to remove the vertical crimping piece 134, and then the vertical through-hole socket body 131 is inserted into the corresponding through-hole in the pump truck chassis 300 to be welded. The chassis peripheral wall and chassis top wall are then positioned and clamped in sequence. When positioning and clamping the chassis top wall, the vertical crimping piece 134 needs to be reinstalled, and the vertical drive handle 133 is rotated to make the vertical crimping piece 134 press and compact the chassis top wall.

[0128] Reference Figure 22 、 Figure 23 and Figure 25 , part of the vertical through-hole socket body 131 can be formed as a main hole through-hole socket body for inserting into the main hole 31 of the chassis. Figure 24 and Figure 25 Part of the vertical through-socket body 131 can be formed as a sleeve hole through-socket body for inserting the base shaft sleeve hole 32. The sleeve hole through-socket body can be set to have a cylindrical outer contour or a diamond outer contour to adapt to the guiding and positioning requirements of the base shaft sleeve holes 32 with different hole types.

[0129] The above describes in detail the optional implementation methods of the embodiments of the present invention in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation methods. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the scope of protection of the embodiments of the present invention.

[0130] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will no longer separately describe various possible combinations.

[0131] In addition, various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. An auxiliary welding system, comprising: The accompanying tool (100) comprises a tool platform (11) for carrying a workpiece to be welded, and a tool positioning and clamping assembly arranged on the tool platform (11) and for positioning and clamping the workpiece to be welded; and A welding positioner (200) comprises a turning device (23), a rotary platform (22) connected to the turning device (23), and a positioner external device (21) arranged on the rotary platform (22), wherein the positioner external device (21) comprises a device platform (211) for carrying the accompanying tool (100) and a device positioning and clamping assembly arranged on the device platform (211) and for positioning and clamping the accompanying tool (100); A tooling external plate (15) is provided at the middle position of the bottom surface of the tooling platform (11), and a device support structure for supporting the tooling external plate (15) is provided at the middle position of the device platform (211). When the accompanying tooling (100) is positioned and clamped by the device positioning and clamping assembly, the center of the tooling external plate (15), the center of the device support structure and the rotation center of the rotary platform (22) are collinearly arranged.

2. The auxiliary welding system according to claim 1, characterized in that: The device support structure comprises a plurality of universal ball assemblies (212) arranged in a ring shape for jointly supporting the tooling external plate (15).

3. The auxiliary welding system according to claim 1, characterized in that: The device positioning and clamping assembly comprises a plurality of device edge pressing positioning mechanisms arranged in sequence and spaced around the device support structure on the device platform (211), and the edge pressing positioning ends of the plurality of device edge pressing positioning mechanisms can respectively form an oblique pressing connection with the plate edge of the tooling external plate (15).

4. The auxiliary welding system according to claim 3, characterized in that: A plurality of plate edge crimping blocks (16) are provided on the plate edge of the tooling external connection plate (15), which are arranged in sequence and spaced around the plate edge and are used to form the inclined surface crimping in a one-to-one correspondence with the plurality of crimping positioning ends.

5. The auxiliary welding system according to claim 3, characterized in that: An anti-collision buffer block (216) is provided on the top of each edge pressing positioning end.

6. The auxiliary welding system according to claim 3, characterized in that: Part of the device's edge pressing and positioning mechanism is formed as a push mechanism (213), the push mechanism (213) includes a first telescopic device, a first guide structure (213b), a first floating member (213c) and a push crimping block (213d), the first guide structure (213b) forms a first guide channel, one end of the push crimping block (213d) can be slidably extended into the first guide channel and the other end is formed as the edge pressing and positioning end, the first telescopic device includes a first telescopic rod (213a), the first floating member (213c) is arranged in the first guide channel and its two ends are respectively connected to the first telescopic rod (213a) and the push crimping block (213d).

7. The auxiliary welding system according to claim 6, characterized in that: The push crimping block (213d) is formed with a crimping block locking hole (213e), and the positioner external device (21) includes a crimping block locking mechanism (214) arranged on the device platform (211), and the crimping block locking mechanism (214) includes a second telescopic device, a second guide structure (214b) and a locking rod (214d), the second telescopic device includes a second telescopic rod (214a), and the second guide structure (214b) is formed with a second guide channel, and the locking rod (214d) is movably inserted into the second guide channel. Under the drive of the second telescopic rod (214a), the locking rod (214d) can partially extend out of the second guide channel and pass through the crimping block locking hole (213e), so that the push crimping block (213d) is locked.

8. The auxiliary welding system according to claim 7, characterized in that: The crimping block locking mechanism (214) comprises a second floating member (214c), the second floating member (214c) being arranged in the second guide channel and having two ends respectively connected to the second telescopic rod (214a) and the locking plug rod (214d).

9. The auxiliary welding system according to claim 1, characterized in that: The positioner external device (21) includes: A travel switch (217) is provided at a middle position of the device platform (211) and is used to send a positioning and clamping trigger signal when the tooling external plate (15) is supported on the device support structure; A controller communicates with the travel switch (217) and the device positioning and clamping assembly respectively, and the controller is configured to control the device positioning and clamping assembly to perform a positioning and clamping action on the tooling external plate (15) when receiving the positioning and clamping trigger signal.

10. The auxiliary welding system according to claim 1, characterized in that: The positioner external device (21) includes two device guide fixtures (218) arranged in parallel and spaced apart on the device platform (211); the accompanying tooling (100) includes a tooling guide structure (14) arranged at the edge of the tooling platform (11); when the accompanying tooling (100) is placed on the device platform (211), the tooling guide structure (14) can be limited between the two device guide fixtures (218) to pre-position the accompanying tooling (100).

11. An auxiliary welding method, performed by using the auxiliary welding system according to any one of claims 1 to 10, and comprising: Positioning and clamping the workpiece to be welded by the accompanying tool (100); Positioning and clamping the accompanying tool (100) through the positioner external device (21); During welding, the spatial position of the workpiece to be welded is adjusted by the welding positioner (200).

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