A double-base synchronous automatic machining clamping device and method for a lorry-mounted crane

Abstract

The application discloses a double-base synchronous automatic machining clamping device and method for a lorry-mounted crane, which comprises a tooling base, a machining module I, a machining module II, a pipeline groove, a hydraulic pump station and a control system; the machining module I and the machining module II are arranged in mirror image symmetry on the tooling base and share the control system; the machining module I and the machining module II are of the same structure and each comprises a platform, a first synchronous clamping device, a second synchronous clamping device, a centering device, a first front-rear positioning device, a second front-rear positioning device, a third synchronous clamping device and a fourth synchronous clamping device; the centering device is located on the center line of the machining module; the first synchronous clamping device and the second synchronous clamping device are located at two ends of the machining module and are distributed in central symmetry. The application reduces the number of clamping, tool setting and alignment, greatly reduces auxiliary working hours, is suitable for batch assembly line production, and solves the problems of assembly mispositioning, eccentric loading and rotary jamming.

Description

Technical Field

[0001] This invention relates to the field of mechanical technology, specifically to a synchronous automated processing and clamping device and method for a truck-mounted crane with dual bases. Background Technology

[0002] The truck-mounted crane base is the core primary load-bearing structure connecting the truck chassis and the slewing bearing. Its machining accuracy directly determines the smoothness of the crane's rotation, load-bearing stability, and service life. In mass production, extremely high requirements are placed on the base's parallelism, flatness, hole consistency, and assembly compatibility. Currently, the industry commonly suffers from the following technical deficiencies in machining:

[0003] 1. Traditional single-tool single-piece processing is extremely inefficient: only one base can be clamped at a time, resulting in low equipment utilization, frequent loading and unloading, numerous tool setting operations, and high costs for mass production.

[0004] 2. Inconsistent clamping datum for two-piece setup: Two workpieces are clamped and tool-set twice, resulting in datum offset and inconsistent clamping deformation.

[0005] 3. Cutting vibration leads to loose clamping and dimensional drift in batch processing: Long-term milling and drilling will produce vibration, which is transmitted to the threaded locking structure, causing thermal expansion gap to increase, clamping force to decrease, and slight displacement of the workpiece to cause batch dimensional deviations and scrap.

[0006] 4. Manual adjustment and changeover rely on experience, resulting in poor consistency and slow changeover: When producing multi-tonnage bases on mixed production lines, it is entirely dependent on manual measurement, adjustment, and calibration, which leads to long changeover times, non-standard parameters, and large product dispersion.

[0007] Existing technologies, such as simple dual-station supports, only realize the placement function and do not have the core capabilities of synchronous clamping, unified benchmark, intelligent compensation, and machine tool linkage. They cannot meet the requirements of high-precision, automated, and consistent mass production, and there is a significant technological gap. Summary of the Invention

[0008] The technical problem to be solved by this invention is: in order to solve the problems of low efficiency, poor accuracy consistency, large processing vibration, cutting loosening, cumbersome changeover and inability to achieve unmanned production of existing truck-mounted crane base processing fixtures, this invention provides a truck-mounted crane dual-base synchronous automated processing clamping device and method, which realizes dual workpiece clamping at one time, synchronous processing, unified reference, stress balance, intelligent changeover and unmanned production, and completely solves the industry's processing pain points from the perspective of mechanical structure + electrical closed loop + machine tool linkage.

[0009] To solve the above technical problems, the present invention adopts the following technical solution:

[0010] A truck-mounted crane dual-base synchronous automated processing and clamping device includes a tooling base, processing module I, processing module II, pipeline trough, hydraulic pump station, and control system;

[0011] Processing module I and processing module II are arranged symmetrically on the tooling base and are integrated with and share a control system;

[0012] Processing module I and processing module II have the same structure, both including a platform, a first synchronous clamping device, a second synchronous clamping device, a centering device, a first front-rear positioning device, a second front-rear positioning device, a third synchronous clamping device, and a fourth synchronous clamping device; the centering device is located on the center line of the processing module and can move back and forth, used to position the hinge assembly; the first synchronous clamping device and the second synchronous clamping device are located at both ends of the processing module and are centrally symmetrically distributed; the first front-rear positioning device and the second front-rear positioning device are used to lock the front and rear positions of the workpiece.

[0013] Furthermore, the tooling base is ground as a whole to form a unified reference plane. Both processing module I and processing module II use the surface of the tooling base as the only processing reference, ensuring that the reference coordinate systems of the two modules are completely coincident and the form and position tolerance is ≤0.02mm.

[0014] Positioning is achieved through a reference plane, and bolts are used to fix the platform to the tooling base, thereby fixing machining module I and machining module II.

[0015] Furthermore, the centering device includes a first guide rail, a support plate, a lead screw, a positioning support seat, a first clamping device, a first hydraulic cylinder, and a first base.

[0016] The first guide rail, tray, lead screw, positioning support, first clamping device and first hydraulic cylinder are all assembled onto the first base, and the first base is connected to the tooling base by bolts.

[0017] The centering device moves back and forth and the pallet is lifted by the first guide rail and the lead screw; the first clamping device is set above the first hydraulic cylinder, which is used to drive the first clamping device; the clamping end of the first clamping device uses an arc-shaped pressure plate to ensure balanced force; the pallet is set below the first hydraulic cylinder to position the height of the hinge shaft, and the pallet is V-shaped to facilitate the centering of the hinge shaft.

[0018] Furthermore, the first synchronous clamping device, the second synchronous clamping device, the centering device, the first front and rear positioning device, the second front and rear positioning device, the third synchronous clamping device, and the fourth synchronous clamping device are all located on the platform;

[0019] The platform is convex in shape; the centering device is located at the protrusion of the platform and is connected to the platform through the first guide rail; the first synchronous clamping device and the second synchronous clamping device are located at both ends of the platform, symmetrically arranged and fixed by bolts; the first front and rear positioning device and the second front and rear positioning device are located opposite the centering device and are symmetrically arranged along the edge of the platform.

[0020] Furthermore, the control system includes a positioning reference, a synchronous clamping constant force locking mechanism, and parameterized electronic control.

[0021] Furthermore, both the first and second synchronous clamping devices include a horizontal pressure plate, a second guide rail, a horizontal hydraulic cylinder, and a second base; the horizontal hydraulic cylinder pushes the horizontal pressure plate to move, and the plate moves along the guide rail for alignment.

[0022] The first and second synchronous clamping devices achieve stable clamping through the second guide rail and the horizontal hydraulic cylinder.

[0023] Furthermore, the first synchronous clamping device, the second synchronous clamping device, the third synchronous clamping device, and the fourth synchronous clamping device are driven synchronously by the same hydraulic system to ensure that the clamping pressure and clamping formation of the left and right workpieces are synchronously equal.

[0024] Heat-insulating pads are provided on the clamping contact surfaces between the first, second, third, and fourth synchronous clamping devices and the workpiece; the clamping devices have built-in pressure sensors to collect clamping pressure in real time and maintain a constant clamping force throughout the process to prevent workpiece displacement.

[0025] Furthermore, both the first and second front and rear positioning devices include a second clamping device, a backing, and a second hydraulic cylinder; the backing is used for positioning reference and bearing the second clamping device located above the second hydraulic cylinder; the clamping head of the second clamping device can rotate 180 degrees.

[0026] Furthermore, the exposed pipeline groove on the tooling base is made of stainless steel buckle plate, with a size of 70mm×100mm, and is fixed by bolts, with built-in hydraulic pipelines and electrical control circuits.

[0027] Furthermore, this invention also proposes a method for synchronous automated machining and clamping of dual bases on a truck-mounted crane, comprising:

[0028] S1. By running the machine tool program, the control system is activated and the clamping parameters of the corresponding product model are called to make the front and rear positions and height dimensions of the centering device reach the preset values.

[0029] S2. Hoist the two base pieces to the clamping device, align the hinge pins with the centering device, and then lower them directly.

[0030] S3. One-button start clamping device. The third and fourth synchronous clamping devices run first, the oil cylinder extends to press the base square box. After the pressure reaches the preset parameter, the centering device runs, the oil cylinder extends to press the hinge shaft. Finally, the first and second synchronous clamping devices run, pressing the ends of the square box synchronously from both sides. After the preset clamping force is reached, the control system displays that clamping is complete.

[0031] S4. The control system sends a signal indicating that the clamping is complete to the machine tool, and the machine tool begins processing.

[0032] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects:

[0033] 1. Simultaneous processing of two parts, doubling capacity and greatly improving equipment utilization: In this invention, the entire set of machining processes for two base pieces is completed in one clamping, reducing the number of clamping, tool setting, and alignment operations, greatly reducing auxiliary time, and making it suitable for mass production lines.

[0034] 2. Shared unified benchmark + stress equalization control, industry-leading pairing accuracy: In this invention, the two workpieces are processed in the same coordinate system, and the clamping pressure, deformation and cutting force are completely consistent, which completely solves the problems of assembly misalignment, off-center loading and rotation jamming.

[0035] 3. Dynamic pressure compensation to prevent machining dimension drift: This invention solves the problems of thread loosening, clamping force attenuation, and workpiece micro-displacement caused by long-term cutting. It achieves extremely high dimensional stability in batch machining and significantly reduces the scrap rate.

[0036] 4. One-click parameter library for the entire product line, enabling highly flexible production: This invention establishes a parameter library for the entire product line, automatically adapting to machine tool processing programs. No manual measurement or debugging is required, resulting in fast changeover speeds, standardized processes, and high product consistency. When switching products, only a one-click switch to the model parameter library is needed; the tooling automatically completes distance adjustment, alignment, and parameter matching, eliminating the need for manual tooling modifications and enabling rapid changeover production. Attached Figure Description

[0037] Figure 1 This is an overall structural diagram of the device of the present invention.

[0038] Figure 2 This is a structural diagram of the processing module of the device of the present invention.

[0039] Figure 3 This is a structural diagram of the centering device of the present invention.

[0040] Figure 4 This is a structural diagram of the front and rear positioning devices of the present invention.

[0041] Figure 5 This is a structural diagram of the first and second synchronous clamping devices of the present invention.

[0042] Figure 6 This is a schematic diagram of the clamping of the device of the present invention.

[0043] Reference numerals: 1-Tooling base, 2-Machining module I, 3-Machining module II, 4-Pipeline trench, 5-Hydraulic pump station, 6-Control system, 21-First synchronous clamping device, 22-First front and rear positioning device, 23-Second front and rear positioning device, 24-Second synchronous clamping device, 25-Third synchronous clamping device, 26-Centering device, 27-Fourth synchronous clamping device, 261-First guide rail, 262-Packet, 263-Screw, 264-Positioning support, 265-First clamping device, 266-First hydraulic cylinder, 267-First base, 221-Second clamping device, 222-Backrest, 223-Second hydraulic cylinder, 211-Horizontal pressure plate, 212-Second guide rail, 213-Horizontal hydraulic cylinder, 214-Second base. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0045] To achieve the above objectives, this invention proposes a synchronous automated processing and clamping device for a truck-mounted crane with dual bases, such as... Figure 1 As shown, it includes a tooling base 1, a processing module I 2, a processing module II 3, a pipeline trough 4, a hydraulic pump station 5, and a control system 6.

[0046] The tooling base 1 is made of 200mm thick cast steel and is precision ground, which has extremely high rigidity and positioning accuracy, providing a stable fixed foundation for the whole set of equipment. Multiple threaded holes are provided for fixing the processing module.

[0047] Machining modules I2 and II3 are arranged symmetrically on the fixture base 1, and are integrated with and share the control system 6. The fixture base 1 is ground as a whole to form a unified reference plane. Both machining modules I2 and II3 use the surface of the fixture base 1 as the sole machining reference, ensuring that the reference coordinate systems of the two modules are completely coincident, with a form and position tolerance ≤0.02mm. The platform is fixed to the fixture base 1 with bolts through the reference plane for positioning, thereby fixing machining modules I2 and II3.

[0048] like Figure 2As shown, processing module I2 and processing module II3 have the same structure, both including a platform, a first synchronous clamping device 21, a second synchronous clamping device 24, a centering device 26, a first front and rear positioning device 22, a second front and rear positioning device 23, a third synchronous clamping device 25, and a fourth synchronous clamping device 27; the centering device 26 is located on the center line of the processing module and can move back and forth, used to position the hinge assembly; the first synchronous clamping device 21 and the second synchronous clamping device 24 are located at both ends of the processing module and are centrally symmetrically distributed; the first front and rear positioning device 22 and the second front and rear positioning device 23 are used to lock the front and rear positions of the workpiece.

[0049] like Figure 3 As shown, the centering device 26 includes a first guide rail 261, a support plate 262, a lead screw 263, a positioning support 264, a first clamping device 265, a first hydraulic cylinder 266, and a first base 267; the centering device 26 is used to position the workpiece hinge shaft.

[0050] The first guide rail 261, the support plate 262, the lead screw 263, the positioning support seat 264, the first clamping device 265 and the first hydraulic cylinder 266 are assembled onto the first base 267, and the first base 267 is connected to the tooling base 1 by bolts.

[0051] The centering device 26 moves back and forth and the support plate 262 is lifted by the first guide rail 261 and the lead screw 263; the first clamping device 265 is set above the first hydraulic cylinder 266, which is used to drive the first clamping device 265; the clamping end of the first clamping device 265 uses an arc-shaped pressure plate to ensure balanced force; the support plate 262 is set below the first hydraulic cylinder 266 to position the height of the hinge shaft, and the support plate 262 is V-shaped to facilitate the centering of the hinge shaft.

[0052] The first synchronous clamping device 21, the second synchronous clamping device 24, the centering device 26, the first front and rear positioning device 22, the second front and rear positioning device 23, the third synchronous clamping device 25, and the fourth synchronous clamping device 27 are all located on the platform; the platform is U-shaped; the centering device 26 is located at the protrusion of the platform and is connected to the platform through the first guide rail 261; the first synchronous clamping device 21 and the second synchronous clamping device 24 are located at both ends of the platform, symmetrically arranged, and fixed by bolts; the first front and rear positioning device 22 and the second front and rear positioning device 23 are located opposite the centering device 26 and are symmetrically arranged along the edge of the platform.

[0053] like Figure 4As shown, both the first front and rear positioning device 22 and the second front and rear positioning device 23 include a second clamping device 221, a backrest 222, and a second hydraulic cylinder 223. The backrest 222 is used for positioning reference and bearing. The clamping device 221 is set above the second hydraulic cylinder 223. The positioning surface of the backrest 222 is precision ground, and the front and rear error of the two positioning surfaces is less than 0.5mm. It is used to position the rear support of the base. The clamping head of the clamping device 221 can rotate 180 degrees.

[0054] like Figure 5 As shown, both the first synchronous clamping device 21 and the second synchronous clamping device 24 include a horizontal pressure plate 211, a second guide rail 212, a horizontal hydraulic cylinder 213, and a second base 214. The horizontal hydraulic cylinder 213 pushes the horizontal pressure plate 211 to move, aligning it with the guide rail 212. The stability of the movement is ensured by the horizontal hydraulic cylinder 213 pushing the horizontal pressure plate 211 to move, and the second guide rail 212 aligning it with the guide rail. The pressure plate pushes and presses against the ends of the base body from both sides, and the strokes at both ends can be controlled separately to adapt to different types of products. The first synchronous clamping device 21 and the second synchronous clamping device 24 raise the overall height to 200mm through the second base 214, making them compatible with all product series. The pressure head has a built-in pressure sensor to maintain a constant holding force on both sides.

[0055] The first synchronous clamping device 21, the second synchronous clamping device 24, the third synchronous clamping device 25, and the fourth synchronous clamping device 27 are synchronously driven by the same hydraulic system to ensure that the clamping pressure and clamping force of the left and right workpieces are synchronously equal. The clamping contact surfaces between the first synchronous clamping device 21, the second synchronous clamping device 24, the third synchronous clamping device 25, and the fourth synchronous clamping device 27 and the workpiece are provided with heat-insulating pads. The clamping devices have built-in pressure sensors to collect the clamping pressure in real time and maintain a constant clamping force throughout the process to prevent workpiece displacement.

[0056] The exposed pipeline trough 4 on the tooling base 1 is made of stainless steel plate, measuring 70mm × 100mm, and is fixed with bolts. It houses the hydraulic pipelines and electrical control circuits. The pipelines are concentrated in the center of the tooling base 1 and led out from the lower cable trough to the hydraulic pump station 5 and control system 6.

[0057] The independent hydraulic pump station 5 provides power to the hydraulic part of the entire unit.

[0058] The control system 6 includes a positioning reference, a synchronous clamping constant force locking mechanism, and parameterized electrical control. The control system 6 can automatically adjust the operation of the entire device through a predetermined program, match machining parameters in real time, and store clamping parameters for different product models. Simultaneously, this control system can interact with the machine tool control system to achieve unmanned machining.

[0059] like Figure 6As shown, the automated machining and clamping method for dual-base truck-mounted cranes includes:

[0060] S1. By running the machine tool program, the control system 6 is activated and the clamping parameters of the corresponding product model are called so that the front and rear positions and height dimensions of the centering device 26 reach the preset values.

[0061] S2. Hoist the two base pieces to the clamping device, align the hinge position with the centering device 26, and then lower them directly.

[0062] S3. The clamping device is started with one key. The third synchronous clamping device 25 and the fourth synchronous clamping device 27 run first. The oil cylinder extends to press the base square box. After the pressure reaches the preset parameter, the centering device 26 runs. The oil cylinder extends to press the hinge shaft. Finally, the first synchronous clamping device 21 and the second synchronous clamping device 24 run. The ends of the square box are pressed synchronously from both sides. After the preset clamping force is reached, the control system 6 displays that the clamping is complete.

[0063] S4 and control system 6 send a signal indicating that clamping is complete to the machine tool, and the machine tool begins processing.

[0064] The device of this invention uses an integral heavy-duty main base as a reference carrier, and the station spacing is servo-adjustable to adapt to all tonnage bases; it is equipped with a bidirectional servo centering mechanism to establish a shared central reference coordinate system for two workpieces and eliminate clamping errors.

[0065] The device of this invention has a synchronous clamping mechanism arranged in front and above the dual workstations to achieve clamping in all three directions. Combined with the symmetrical hydraulic support on both sides, the cutting forces on the left and right sides are mutually offset and canceled, which greatly reduces processing vibration and elastic yielding.

[0066] The device of this invention integrates a constant force anti-loosening structure at all locking points, and collects clamping force data in real time through a mechanical sensor. The servo system dynamically compensates for the pre-tightening force, achieving zero loosening and zero dimensional drift during long-term batch processing.

[0067] In addition, a pressure closed-loop balancing system is configured to match the workpiece clamping stress in real time, ensuring that the elastic deformation and processing springback of the two bases are completely consistent, guaranteeing a high degree of uniformity in paired processing accuracy. A built-in parameter library for the entire series of machine models enables one-click model switching, automatic alignment, and automatic matching of process parameters, adapting to flexible automated production lines.

[0068] The device of this invention is connected to a host computer to store clamping parameters for various types of products. Through information interaction with the machine tool control system, it enables rapid changeover production.

[0069] In this invention, a pressure closed-loop balancing module is used to collect the workpiece clamping pressure in real time. When the pressure value exceeds a set threshold, the servo system dynamically fine-tunes the clamping stroke on one side to keep the base clamping stress and elastic deformation constant. The servo intelligent control system has a built-in library of base structure parameters for all types of truck-mounted cranes. It can call up the station spacing, clamping stroke, and standard pressure with one click based on the feedback from the machine tool system program, realizing one-click automatic changeover and unmanned debugging for multiple types of workpieces.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A synchronous automated processing and clamping device for a truck-mounted crane with dual bases, characterized in that, It includes a tooling base (1), processing module I (2), processing module II (3), pipeline trench (4), hydraulic pump station (5), and control system (6); The machining module I (2) and machining module II (3) are arranged symmetrically on the tooling base (1), and the control system (6) is integrated and shared. The processing module I (2) and processing module II (3) have the same structure, both including a platform, a first synchronous clamping device (21), a second synchronous clamping device (24), a centering device (26), a first front and rear positioning device (22), a second front and rear positioning device (23), a third synchronous clamping device (25), and a fourth synchronous clamping device (27); the centering device (26) is located on the center line of the processing module and can move back and forth, and is used to position the hinge assembly; the first synchronous clamping device (21) and the second synchronous clamping device (24) are located at both ends of the processing module and are centrally symmetrically distributed; the first front and rear positioning device (22) and the second front and rear positioning device (23) are used to lock the front and rear positions of the workpiece; The hydraulic pump station (5) provides power to the hydraulic components.

2. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 1, characterized in that, The tooling base (1) is ground into a unified reference plane. Both the processing module I (2) and the processing module II (3) use the surface of the tooling base (1) as the only processing reference to ensure that the reference coordinate systems of the two modules are completely coincident and the form and position tolerance is ≤0.02mm. Positioning is achieved by using a reference plane, and bolts are used to fix the platform to the tooling base (1), thereby fixing the processing module I (2) and processing module II (3).

3. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 2, characterized in that, The centering device (26) includes a first guide rail (261), a support plate (262), a lead screw (263), a positioning support (264), a first clamping device (265), a first hydraulic cylinder (266), and a first base (267). The first guide rail (261), the pallet (262), the lead screw (263), the positioning support (264), the first clamping device (265) and the first hydraulic cylinder (266) are assembled onto the first base (267), and the first base (267) is connected to the tooling base (1) by bolts; The centering device (26) moves back and forth and the pallet (262) is lifted by the first guide rail (261) and the lead screw (263); the first pressing device (265) is set above the first hydraulic cylinder (266), which is used to drive the first pressing device (265); the pressing end of the first pressing device (265) uses an arc-shaped pressure plate to ensure balanced force; the pallet (262) is set below the first hydraulic cylinder (266) to position the height of the hinge shaft, and the shape of the pallet (262) is V-shaped to facilitate the centering of the hinge shaft.

4. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 3, characterized in that, The first synchronous clamping device (21), the second synchronous clamping device (24), the centering device (26), the first front and rear positioning device (22), the second front and rear positioning device (23), the third synchronous clamping device (25) and the fourth synchronous clamping device (27) are all located on the platform; The platform is convex in shape; the centering device (26) is located at the protrusion of the platform and is connected to the platform through the first guide rail (261); the first synchronous clamping device (21) and the second synchronous clamping device (24) are located at both ends of the platform, symmetrically arranged and fixed by bolts; the first front and rear positioning device (22) and the second front and rear positioning device (23) are located opposite the centering device (26) and symmetrically arranged along the edge of the platform.

5. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 1, characterized in that, The control system (6) includes a positioning reference, a synchronous clamping constant force locking mechanism, and a parameterized electronic control.

6. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 1, characterized in that, Both the first synchronous clamping device (21) and the second synchronous clamping device (24) include a horizontal pressure plate (211), a second guide rail (212), a horizontal hydraulic cylinder (213), and a second base (214); the horizontal hydraulic cylinder (213) pushes the horizontal pressure plate (211) to move, and aligns and moves through the guide rail (212); The first synchronous clamping device (21) and the second synchronous clamping device (24) achieve stable clamping through the second guide rail (212) and the horizontal hydraulic cylinder (213).

7. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 1, characterized in that, The first synchronous clamping device (21), the second synchronous clamping device (24), the third synchronous clamping device (25) and the fourth synchronous clamping device (27) are driven synchronously by the same hydraulic system to ensure that the clamping pressure and clamping formation of the left and right workpieces are synchronously equal. The clamping contact surfaces between the first synchronous clamping device (21), the second synchronous clamping device (24), the third synchronous clamping device (25), and the fourth synchronous clamping device (27) and the workpiece are provided with heat-insulating pads; the clamping devices have built-in pressure sensors to collect clamping pressure in real time and maintain a constant clamping force throughout the process to avoid workpiece displacement.

8. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 1, characterized in that, The first front and rear positioning device (22) and the second front and rear positioning device (23) both include a second pressing device (221), a backrest (222), and a second hydraulic cylinder (223); the backrest (222) is used for positioning reference and bearing the second hydraulic cylinder (223) with the second pressing device (221) installed above it; the pressing head of the second pressing device (221) can rotate 180 degrees.

9. The truck-mounted crane dual-base synchronous automated processing and clamping device according to claim 1, characterized in that, The exposed part of the tooling base (1) has a pipeline groove (4) made of stainless steel buckle plate with a size of 70mm×100mm. It is fixed by bolts and has built-in hydraulic pipelines and electrical control circuits.

10. A method applied to the synchronous automated machining and clamping device for a truck-mounted crane with dual bases as described in any one of claims 1-9, characterized in that, include: S1. By running the machine tool program, the control system (6) is activated and the clamping parameters of the corresponding model product are called so that the front and rear positions and height dimensions of the centering device (26) reach the preset values. S2. Hoist the two base bodies to the clamping device, align the hinge position with the centering device (26), and then put them down directly; S3. The clamping device is started with one key. The third synchronous clamping device (25) and the fourth synchronous clamping device (27) run first. The oil cylinder extends to press the base square box. After the pressure reaches the preset parameter, the centering device (26) runs. The oil cylinder extends to press the hinge shaft. Finally, the first synchronous clamping device (21) and the second synchronous clamping device (24) run to press the end of the square box from both sides. After the preset clamping force is reached, the control system (6) displays that the clamping is complete. S4. The control system (6) sends a signal indicating that the clamping is complete to the machine tool, and the machine tool begins processing.

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