Multi-point die with normal loading distribution force real-time measurement function

Abstract

The invention discloses a multi-point die with a normal loading distribution force real-time measurement function, and relates to the technical field of mechanical engineering, the multi-point die comprises a die holder assembly, a forming basic body assembly, a force measurement module and a motion control and data processing assembly, the plurality of basic body assemblies are used for forming a mold profile and forming a plate, the force measurement module is used for measuring loading force, and the motion control and data processing assembly is used for collecting and transmitting measurement data of basic body height adjustment, real-time loading force and a punch swing angle; in the forming process of a plate, pressurization forming is conducted through the multiple basic body assemblies, the force measuring module measures the loading force in real time, a loading force signal of the force measuring module is collected through the motion control and data processing assembly and transmitted to the computer, and normal loading force calculation is completed.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering technology, specifically to a multi-point mold with real-time measurement function of normal loading distributed force. Background Technology

[0002] Curved panel forming processes generally rely on dedicated molds or multi-point molds. For dedicated molds, different parts often require one or more sets of molds to form. The design, manufacturing and debugging cycle of molds is long and the utilization rate is low. At the same time, they require a large space for storage, resulting in high production costs. Multi-point molds, on the other hand, discretize traditional integral molds into array-arranged, height-adjustable basic bodies. They use the envelope surface formed by the tops of the basic bodies to replace the fixed mold surface to achieve rapid forming of three-dimensional curved surface parts of different shapes. This has shown significant technical advantages in high-end equipment fields such as aerospace, shipbuilding, and rail transportation.

[0003] As the core component of a multi-point mold, the contact between the basic body and the workpiece directly determines the forming quality during multi-point forming. In existing technologies, the design of the basic body head is mainly divided into two categories: spherical and square. A spherical head can form point contact with any curved surface, but the small contact area easily leads to stress concentration, causing indentations and wrinkles on the workpiece. A square, flexible indenter head improves the indentation problem by increasing the contact area, but it still cannot completely eliminate forming defects. Simultaneously, the arrangement of the basic bodies also affects forming accuracy. Non-contact arrangements are prone to lateral force displacement during three-dimensional curved surface forming, while contact arrangements improve rigidity through adjacent supports, but still cannot solve the deformation coordination problem caused by uneven forming force distribution.

[0004] Precise control of forming force is crucial for ensuring the quality of multi-point forming. Traditional multi-point molds and forming equipment generally employ closed-loop position control, completing the forming process by presetting the height of the workpiece and the equipment's travel trajectory, lacking direct detection and feedback of forming force. While this method can guarantee the basic requirements of forming, it has certain limitations. On the one hand, fluctuations in workpiece material properties and anisotropy can cause the actual forming force to deviate from the expected value, resulting in defects such as uneven deformation and poor forming accuracy. On the other hand, curved panels inevitably experience elastic recovery after unloading, with high-strength steel plates exhibiting particularly pronounced springback, which a single closed-loop position control mode cannot provide accurate data response for springback compensation. To compensate for these problems, remedial measures such as multi-pass forming or overlapping area pressing are often required, significantly reducing production efficiency and equipment operating costs. Furthermore, continuous hard-contact forming exacerbates wear on the workpiece and equipment impact, reducing the service life of the multi-point mold. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-point mold with real-time measurement function of normal loading distributed force, so as to solve the problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The multi-point mold with real-time measurement function of normal loading distribution force includes a mold base assembly, a forming base assembly, a force measurement module, and a motion control and data processing component. The mold base assembly is placed on a horizontal foundation. The mold base assembly is connected to the forming base assembly through the force measurement module. The forming base assembly has the function of transmitting forming loading force. The mold base assembly is connected to the motion control and data processing component through wires.

[0007] Furthermore, the mold base comprises a mold base, an electrical box, an integrated cable, and an electromechanical integrated installation assembly. Multiple electromechanical integrated installation assemblies are fixedly installed on the mold base. An electrical wiring harness routing channel is provided inside the mold base, and an integrated cable is installed within the electrical wiring harness routing channel. An electrical box is fixedly installed on the side of the mold base. The electromechanical integrated installation assembly includes a fixed mounting base and an electrical socket. The fixed mounting base is fixedly connected to the electrical socket and to the mold base. One end of the integrated cable is connected to the electrical socket, and the other end of the integrated cable is connected to the electrical box.

[0008] Furthermore, the forming base assembly is densely arrayed within the mold base assembly. The forming base assembly includes a punch assembly, a transmission cube, a trapezoidal screw, a pressure bearing assembly, a servo geared motor, and a load-bearing motor housing. The punch assembly is located at the top of the forming base assembly and contains an angle sensor. The lower end of the punch assembly is fixedly connected to the transmission cube, which has a hollow structure with trapezoidal internal threads at its lower end. The lower end of the transmission cube is fitted onto the outside of the trapezoidal screw, forming a trapezoidal screw transmission pair. The pressure bearing assembly is installed below the trapezoidal screw, and the load-bearing motor housing is fixedly installed below the pressure bearing assembly. A servo geared motor is installed within the load-bearing motor housing.

[0009] Furthermore, the punch assembly includes a punch cap, an inclination sensor, a ball screw, a ball joint seat, and a punch mounting base. The punch cap is fixedly connected to the ball screw, the ball screw and the ball joint seat are engaged by a spherical surface, and the inclination sensor is mounted on the ball screw.

[0010] Furthermore, the trapezoidal screw includes a flange, an input shaft, and a stop assembly. A pressure bearing assembly is disposed below the trapezoidal screw. The pressure bearing assembly includes a bearing mounting seat, a first thrust bearing, an elastic element, and a second thrust bearing. The output shaft of the servo reducer motor is connected to the input shaft of the trapezoidal screw via a key. The stop assembly is fixedly connected to the input shaft and provides axial limitation for the pressure bearing assembly. Along the direction from the flange to the stop assembly, the first thrust bearing, the elastic element, and the second thrust bearing are sequentially mounted on the input shaft. The two ends of the elastic element abut against the first and second thrust bearings, respectively. The elastic element is used to push the first thrust bearing towards the flange and abut against the flange, providing support for the flange when adjusting the height of the forming basic body assembly. The bearing mounting seat is used to mount the first and second thrust bearings and to support the flange during curved panel forming loading.

[0011] Furthermore, the elastic element is one of a disc spring, a coil spring, a rubber elastic element, or a polyurethane elastic element.

[0012] Furthermore, the force measurement module is fixedly installed at the bottom of the forming base assembly and plugged into the electromechanical integrated mounting assembly. The force measurement module includes a measuring unit, a cable, an electrical plug, and a measuring unit mounting base. The upper surface of the measuring unit abuts against the lower surface of the load-bearing motor compartment. The cable is electrically connected to the measuring unit and to the servo geared motor. The cable is connected to an electrical socket through the electrical plug.

[0013] Furthermore, the measuring unit adopts a ring-shaped force sensor design, with an overall hollow square, pressure-bearing structure. The measuring unit is designed with a ring-shaped elastomer and spokes. Multiple strain bridges and measuring circuits are arranged inside the spokes. The spokes are led out from the inner wall of the measuring unit through cables and connected to a servo geared motor. The spokes are connected to an electrical socket through an electrical plug. The upper surface of the ring-shaped elastomer abuts against the bottom of the formed basic body assembly.

[0014] Furthermore, the motion control and data processing component includes a motion and data processing module and a connecting cable, wherein the motion and data processing module is electrically connected to the electrical box via the connecting cable.

[0015] Furthermore, the motion and data processing module is equipped with a motor drive module, a punch swing angle acquisition module, and a loading force acquisition module. The motor drive module is connected to a connecting cable, the punch swing angle acquisition module is connected to a connecting cable, and the loading force acquisition module is connected to a connecting cable.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a servo-driven geared motor to rotate a trapezoidal screw at a predetermined speed and number of revolutions. This causes the transmission cube to rotate and move upwards, driving the punch assembly to form a mold surface. After forming the mold surface, the material is loaded and shaped under the action of a press. In this process, the forming basic assembly participates in the forming process as the mold surface and senses the punching pressure during the forming of the sheet metal. The sheet metal is formed into a specific curved surface under the action of the punch assembly. As the punch cap contacts the sheet metal and changes with the curvature of the sheet metal, it rotates around the spherical surface of the ball joint seat on the punch mounting base under the transmission action of the ball screw. This ensures that the punch cap is always in normal contact with the surface of the sheet metal, so that the loading force on the forming basic assembly can be transmitted along its height direction to the force measurement module. The tilt sensor can sense the angle change of the punch as the shape of the sheet metal changes in real time and transmit the signal to the motion control and data processing module. The linear motion of multiple forming basic assemblies forms a multi-point mold surface, thereby ensuring uniform stress on the sheet metal and improving the forming quality of the sheet metal.

[0017] 2. This invention utilizes a modular structure for the forming base assembly, employing standardized design or standard parts. The dimensions and specifications can be flexibly adjusted according to application scenarios, enabling rapid adaptation from low to high loads. The force measurement module can modify its structure, dimensions, and other design parameters to cover different measurement ranges based on the structure and application requirements of the forming base assembly. The mold base assembly is an electromechanical integrated modular component, allowing for rapid design and manufacturing based on the required specifications, quantity, and arrangement of the forming base assembly. The forming base assembly and force measurement module can be quickly installed onto the mold base assembly using electromechanical integrated mounting components, achieving rapid installation and improving work efficiency.

[0018] 3. This invention features modular structures for all components, using standardized designs or standard parts. It allows for rapid design, manufacturing, and installation by changing the size of self-made parts and the model of standard parts according to different application scenarios, achieving full-scenario coverage from light loads to heavy loads and different forming areas. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is an exploded view of the upper or lower multi-point mold structure in this invention; Figure 3 This is a schematic diagram of the external structure of the mold base of the present invention; Figure 4 This is a schematic diagram of the external structure of the molded basic body assembly of the present invention; Figure 5 This is a schematic diagram of the connection structure between the trapezoidal screw, the pressure bearing assembly, and the servo geared motor of the present invention; Figure 6This is a schematic diagram of the electromechanical integrated installation component and force measurement module of the present invention; Figure 7 This is a schematic diagram of the punch structure of the present invention; Figure 8 for Figure 7 Another schematic diagram of the state structure; Figure 9 This is a schematic diagram of the motion control and data processing component structure of the present invention.

[0020] In the diagram: 100, mold base assembly; 110, mold base; 120, electrical box; 130, integrated cable; 140, electromechanical integrated mounting assembly; 141, fixed mounting base; 142, electrical socket; 200, forming base assembly; 210, punch assembly; 211, punch cap; 212, tilt sensor; 213, ball screw; 214, ball joint seat; 215, punch mounting base; 220, transmission cube; 230, trapezoidal screw; 231, flange; 232, input shaft; 233, stop assembly; 240, pressure bearing assembly; 241, shaft. 242. Thrust bearing I; 243. Elastic element; 244. Thrust bearing II; 250. Servo geared motor; 260. Thrust motor housing; 300. Force measurement module; 310. Measurement unit; 311. Annular elastomer; 312. Wheel spoke; 320. Cable; 330. Electrical plug; 340. Measurement unit mounting base; 400. Motion control and data processing components; 410. Motion and data processing module; 411. Motor drive module; 412. Punch swing angle acquisition module; 413. Loading force acquisition module; 420. Connecting cable. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example: Figures 1-9 As shown, the present invention provides a technical solution: like Figure 1 , Figure 2As shown, a multi-point mold with real-time measurement function of normal loading distribution force includes a mold base assembly 100, a forming base assembly 200, a force measurement module 300, and a motion control and data processing component 400. The mold base assembly 100 is placed on a horizontal base. The mold base assembly 100 is connected to the forming base assembly 200 through the force measurement module 300. The forming base assembly 200 has the function of transmitting forming loading force. The mold base assembly 100 is connected to the motion control and data processing component 400 through wires.

[0023] The mold base assembly 100 serves as the foundation for mechanical and electrical installation. Multiple basic assemblies are used for mold surface construction and sheet metal forming. The force measurement module 300 is used to measure the loading force. The motion control and data processing component 400 is used to collect and transmit measurement data of basic body height adjustment, real-time loading force, and punch swing angle. During the sheet metal forming process, pressure forming is performed through multiple basic assemblies. The force measurement module 300 measures the loading force in real time and collects the loading force signal from the force measurement module 300 through the motion control and data processing component 400 and transmits it to the computer to complete the calculation of the normal loading force. At the same time, the mold base 110 assembly is an electromechanical integrated modular component that can be quickly designed and manufactured according to the specifications, quantity, and arrangement of the forming basic body assembly 200 required for forming. The forming basic body assembly 200 and the force measurement module 300 can be quickly installed on the mold base assembly 100 through the electromechanical integrated mounting component 140.

[0024] like Figure 3 , Figure 6 As shown, the mold base assembly 100 includes a mold base 110, an electrical box 120, an integrated cable 130, and an electromechanical integrated installation assembly 140. Multiple electromechanical integrated installation assemblies 140 are fixedly installed on the mold base 110. An electrical wiring harness routing groove is provided inside the mold base 110, and an integrated cable 130 is arranged in the electrical wiring harness routing groove. An electrical box 120 is fixedly installed on the side of the mold base 110. The electromechanical integrated installation assembly 140 includes a fixed mounting base 141 and an electrical socket 142. The fixed mounting base 141 is fixedly connected to the electrical socket 142 and to the mold base 110. One end of the integrated cable 130 is connected to the electrical socket 142, and the other end of the integrated cable 130 is connected to the electrical box 120.

[0025] like Figure 4As shown, the forming base assembly 200 is densely arranged in an array within the mold base assembly 100. The forming base assembly 200 includes a punch assembly 210, a transmission cube 220, a trapezoidal screw 230, a pressure bearing assembly 240, a servo geared motor 250, and a load-bearing motor housing 260. The punch assembly 210 is located at the top of the forming base assembly 200. An angle sensor 212 is installed inside the punch assembly 210. The lower end of the punch assembly 210 is fixedly connected to the transmission cube 220. The lower end of the transmission cube 220 is a hollow structure with a trapezoidal internal thread. The lower end of the transmission cube 220 is fitted onto the outside of the trapezoidal screw 230. The transmission cube 220 and the trapezoidal screw 230 form a trapezoidal screw transmission pair. The pressure bearing assembly 240 is installed below the trapezoidal screw 230. The load-bearing motor housing 260 is fixedly installed below the pressure bearing assembly 240. The servo geared motor 250 is installed inside the load-bearing motor housing 260.

[0026] like Figure 7 , Figure 8 As shown, the punch assembly 210 includes a punch cap 211, an inclination sensor 212, a ball screw 213, a ball joint seat 214, and a punch mounting seat 215. The punch cap 211 is fixedly connected to the ball screw 213, and the ball screw 213 is engaged with the ball joint seat 214 through a spherical fit. The inclination sensor 212 is mounted on the ball screw 213.

[0027] An external controller starts the servo geared motor 250 inside the load-bearing motor compartment 260 via the motor drive module 411. The servo geared motor 250 rotates at a predetermined speed and number of revolutions, driving the trapezoidal screw 230 to rotate, thereby causing the transmission cube 220 to rotate and move upward, driving the punch assembly 210 to form a mold surface. After the mold surface is formed, it is loaded and formed under the action of the press. In this process, the forming basic body assembly 200 participates in the forming as the mold surface and senses the punching pressure during the forming of the sheet metal. The sheet metal is formed into a specific curved surface under the action of the punch assembly 210. The punch cap 211 contacts the sheet metal and changes with the curvature of the sheet metal. During the process, under the transmission action of the ball screw 213, the ball screw rotates around the ball joint seat 214 on the punch mounting seat 215, so that the punch cap 211 is always in normal contact with the surface of the sheet metal. This allows the loading force on the forming basic body assembly 200 to be transmitted along its height direction to the force measurement module 300 and then to the loading force acquisition module 413. The tilt sensor 212 can sense the angle change of the punch as the shape of the sheet metal changes in real time and transmit the signal to the punch tilt angle acquisition module 412. The linear motion of multiple forming basic body assemblies 200 constitutes a multi-point mold surface, thereby ensuring uniform stress on the sheet metal and improving the forming quality of the sheet metal.

[0028] like Figure 5As shown, the trapezoidal screw 230 includes a flange 231, an input shaft 232, and a stop assembly 233. A pressure bearing assembly 240 is disposed below the trapezoidal screw 230. The pressure bearing assembly 240 includes a bearing mounting base 241, a first thrust bearing 242, an elastic element 243, and a second thrust bearing 244. The output shaft of the servo geared motor 250 is connected to the input shaft 232 of the trapezoidal screw 230 via a key. The stop assembly 233 is fixedly connected to the input shaft 232 and provides axial limitation for the pressure bearing assembly 240 along the direction from the flange 231 to the stop assembly 233. A thrust bearing 242, an elastic element 243, and a thrust bearing 244 are sequentially mounted on the input shaft 232. The two ends of the elastic element 243 abut against the thrust bearing 242 and the thrust bearing 244 respectively. The elastic element 243 is used to push the thrust bearing 242 towards the flange 231 and abut against the flange 231. It is used to support the flange 231 when the height of the forming base assembly 200 is adjusted. The bearing mounting seat 241 is used to install the thrust bearing 242 and the thrust bearing 244, and at the same time, it supports the flange 231 when the curved panel is formed and loaded.

[0029] like Figure 5 As shown, the elastic element 243 is one of a disc spring, a coil spring, a rubber elastic element, or a polyurethane elastic element.

[0030] The elastic element 243 is not merely a simple buffer design; it is a multifunctional and critical mechanical safety mechanism that integrates gap elimination, shock absorption, automatic compensation, and overload protection. Through purely mechanical means, it significantly improves the dynamic accuracy, operational stability, reliability, and service life of the entire forming base assembly 200. It is one of the essential design features that ensures the long-term stable operation of this multi-point mold with real-time force measurement capabilities under high dynamic loads.

[0031] like Figure 4 , Figure 6 As shown, the force measurement module 300 is fixedly installed at the bottom of the forming base assembly 200 and plugged into the electromechanical integrated mounting assembly 140. The force measurement module 300 includes a measurement unit 310, a cable 320, an electrical plug 330 and a measurement unit mounting base 340. The upper surface of the measurement unit 310 abuts against the lower surface of the load-bearing motor housing 260. The cable 320 is electrically connected to the measurement unit 310 and to the servo geared motor 250. The cable 320 is connected to the electrical socket 142 through the electrical plug 330.

[0032] like Figure 2 , Figure 4 , Figure 6As shown, the measuring unit 310 adopts a ring force sensor design. The overall structure is a hollow square, pressure-bearing structure. The measuring unit 310 has a ring elastic body 311 and spokes 312 inside. Multiple strain bridges and measuring circuits are arranged inside the spokes 312. The spokes 312 are led out from the inner wall of the measuring unit 310 through the cable 320 and connected to the servo geared motor 250. The spokes 312 are connected to the electrical socket 142 through the electrical plug 330. The upper surface of the ring elastic body 311 abuts against the bottom of the formed basic body assembly 200.

[0033] During the forming loading, the elastomer is compressed and deformed, and the resistance value of the strain bridge changes. The measurement signal is transmitted to the motion control and data processing component 400 via the measurement circuit through the cable 320 and the integrated cable 130. It is converted into a digital signal and transmitted to the computer. The loading force values ​​of multiple forming basic bodies are processed by the computer into a discrete force value matrix of the upper and lower surfaces of the forming part. In addition, the measurement unit 310 has high sensitivity, strong resistance to off-center load, and wide range coverage. At the same time, the design parameters such as structure and size can be changed according to different scenarios to achieve different range coverage.

[0034] like Figure 9 As shown, the motion control and data processing component 400 includes a motion and data processing module 410 and a connecting cable 420. The motion and data processing module 410 is electrically connected to the electrical box 120 via the connecting cable 420.

[0035] like Figure 9 As shown, the motion and data processing module 410 is equipped with a motor drive module 411, a punch swing angle acquisition module 412, and a loading force acquisition module 413. The motor drive module 411 is connected to the connecting cable 420, the punch swing angle acquisition module 412 is connected to the connecting cable 420, and the loading force acquisition module 413 is connected to the connecting cable 420.

[0036] During multi-point mold shaping, the motion and data processing module 410 receives the shaping command and transmits the command information to the integrated servo geared motor 250 via the motor drive module 411 through the integrated cable 130 and electrical plug 330. The integrated servo geared motor 250 rotates at the predetermined speed and number of revolutions in the command, driving the trapezoidal screw 230 to rotate, controlling multiple forming basic body assemblies 200 to form the target surface, realizing the rapid formation of the mold surface. When the multi-point mold is closed and loaded, several forming basic body assemblies 200 participating in the forming in the multi-point mold make multi-point contact with the sheet metal through the punch assembly 210. Upon contact, the forming force is transmitted to the force measurement module 300 via the load-bearing motor compartment 260. The force measurement module 300 senses the force and transmits the loading force signal and the punch swing angle signal together via cable 320, electrical plug 330, and integrated cable 130 to the punch swing angle acquisition module 412 and the loading force acquisition module 413. The motion and data processing module 410 transmits the array values ​​of all the basic body force information and punch swing angle information collected to the computer in real time via the industrial bus to obtain the data of the normal loading force changing over time, realizing the real-time measurement and feedback of the distributed loading force in the entire forming area of ​​the sheet metal.

[0037] Working principle of the invention: The external controller starts the servo geared motor 250 in the load-bearing motor compartment 260 via the motor drive module 411. The servo geared motor 250 rotates at a predetermined speed and number of revolutions, driving the trapezoidal screw 230 to rotate, thereby causing the transmission cube 220 to rotate and move upward, driving the punch assembly 210 to move to a specified height to form a multi-point mold surface. Under the action of the press, the mold closing and loading are completed. The sheet metal is formed into a specific curved surface under the action of the punch assembly 210. The punch cap 211 contacts the sheet metal and changes with the curvature of the sheet metal. Under the transmission action of the ball screw 213, the ball screw rotates around the ball joint seat 214 on the punch mounting seat 215, so that the punch cap 211 is always in normal contact with the surface of the plate. This allows the loading force on the forming basic body assembly 200 to be transmitted to the force measurement module 300 along its height direction. The tilt sensor 212 can sense the angle change of the punch as the shape of the plate changes in real time and transmit the signal to the punch swing angle acquisition module 412. The linear motion of multiple forming basic body assemblies 200 constitutes a multi-point mold surface, thereby ensuring that the plate is subjected to uniform force and improving the forming quality of the plate.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-point mold having a normal load distribution force real-time measurement function, characterized by: The application discloses a multi-point die with a normal load distribution force real-time measuring function.

2. The multi-point mold with normal load distribution force real-time measurement function according to claim 1, characterized in that: The die base assembly (100) comprises a die base (110), an electrical box (120), an integrated cable (130) and a mechatronic integrated installation assembly (140), a plurality of mechatronic integrated installation assemblies (140) are fixedly installed on the die base (110), an electrical harness routing groove is arranged in the die base (110), the integrated cable (130) is arranged in the electrical harness routing groove, the electrical box (120) is fixedly installed on the side surface of the die base (110), the mechatronic integrated installation assembly (140) comprises a fixed mounting seat (141) and an electrical socket (142), the fixed mounting seat (141) is fixedly connected with the electrical socket (142), the fixed mounting seat (141) is fixedly connected with the die base (110), one end of the integrated cable (130) is connected with the electrical socket (142), and the other end of the integrated cable (130) is connected with the electrical box (120).

3. The multi-point mold with normal load distribution force real-time measurement function according to claim 2, characterized in that: The forming basic body assembly (200) is arrayed and densely installed in the die base assembly (100), the forming basic body assembly (200) comprises a punch assembly (210), a transmission cube (220), a trapezoidal screw (230), a pressure bearing assembly (240), a servo reduction motor (250) and a force bearing motor cabin (260), the punch assembly (210) is located at the top end of the forming basic body assembly (200), an inclination sensor (212) is arranged in the punch assembly (210), the lower end of the punch assembly (210) is fixedly connected with the transmission cube (220), the lower end of the transmission cube (220) is a hollow structure with a trapezoidal internal thread, the lower end of the transmission cube (220) is sleeved outside the trapezoidal screw (230), the transmission cube (220) and the trapezoidal screw (230) form a trapezoidal screw transmission pair, the pressure bearing assembly (240) is installed below the trapezoidal screw (230), the force bearing motor cabin (260) is fixedly installed below the pressure bearing assembly (240), and the servo reduction motor (250) is arranged in the force bearing motor cabin (260).

4. The multi-point mold with normal load distribution force real-time measurement function according to claim 3, characterized in that: The punch assembly (210) comprises a punch cap (211), an inclination sensor (212), a ball screw (213), a ball hinge base (214) and a punch mounting base (215), the punch cap (211) is fixedly connected with the ball screw (213), the ball screw (213) is matched with the ball hinge base (214) through a spherical surface, and the inclination sensor (212) is mounted on the ball screw (213).

5. The multi-point mold with normal load distribution force real-time measurement function according to claim 3, characterized in that: The trapezoidal screw (230) comprises a flange (231), an input shaft (232) and a stop component (233), a pressure bearing assembly (240) is arranged below the trapezoidal screw (230), the pressure bearing assembly (240) comprises a bearing mounting base (241), a thrust bearing one (242), an elastic element (243) and a thrust bearing two (244), the output shaft of the servo reduction motor (250) is connected with the input shaft (232) of the trapezoidal screw (230) through a key, the stop component (233) is fixedly connected with the input shaft (232) and axially limits the pressure bearing assembly (240), from the flange (231) to the stop component (233), the input shaft (232) is sequentially provided with the thrust bearing one (242), the elastic element (243) and the thrust bearing two (244), the two ends of the elastic element (243) are respectively abutted against the thrust bearing one (242) and the thrust bearing two (244), the elastic element (243) is used for pushing the thrust bearing one (242) to move towards the flange (231) and abut against the flange (231), and is used for supporting the flange (231) when the height of the forming base assembly (200) is adjusted, and the bearing mounting base (241) is used for mounting the thrust bearing one (242) and the thrust bearing two (244) and supporting the flange (231) when the curved plate is formed and loaded.

6. The multi-point mold having a normal load distribution force real-time measurement function according to claim 5, characterized in that: The elastic element (243) is one of a disc spring, a spiral spring, a rubber elastic element and a polyurethane elastic element.

7. The multi-point mold having a normal load distribution force real-time measurement function according to claim 5, wherein: The force measuring module (300) is fixedly installed at the bottom end of the forming base assembly (200) and is plugged with the mechatronic integrated mounting assembly (140), the force measuring module (300) comprises a measuring unit (310), a cable (320), an electrical plug (330) and a measuring unit mounting base (340), the upper surface of the measuring unit (310) is abutted against the lower surface of the load bearing motor cabin (260), the cable (320) is electrically connected with the measuring unit (310), the cable (320) is electrically connected with the servo reduction motor (250), and the cable (320) is connected with the electrical socket (142) through the electrical plug (330).

8. The multi-point mold having a normal load distribution force real-time measurement function according to claim 7, characterized in that: The measuring unit (310) adopts a ring-shaped force sensor design, which is a hollow square and a pressure bearing structure as a whole, and is internally designed with a ring-shaped elastic body (311) and a spoke (312). A plurality of strain bridges and measuring circuits are arranged in the spoke (312), the spoke (312) is connected to a servo reduction motor (250) through a cable (320) from the inner wall of the measuring unit (310), the spoke (312) is connected to an electrical socket (142) through an electrical plug (330), and the upper surface of the ring-shaped elastic body (311) abuts against the bottom of the shaped basic body assembly (200).

9. The multi-point mold having a normal load distribution force real-time measurement function according to claim 2, characterized in that: The motion control and data processing assembly (400) includes a motion and data processing module (410) and a connecting cable (420), and the motion and data processing module (410) is electrically connected to the electrical box (120) through the connecting cable (420).

10. The multi-point mold having a normal load distribution force real-time measurement function according to claim 9, wherein: The motion and data processing module (410) is provided with a motor driving module (411), a punch swing angle acquisition module (412) and a loading force acquisition module (413), the motor driving module (411) is connected to the connecting cable (420), the punch swing angle acquisition module (412) is connected to the connecting cable (420), and the loading force acquisition module (413) is connected to the connecting cable (420).

Images