Multi-zone integrated all-in-one multi-point molding machine

Abstract

The application discloses a kind of multi-zone integrated multi-point forming machine, belong to multi-point forming equipment technical field, including rack, upper die and lower die, upper die is set on rack by lifting drive structure, upper die and lower die are all provided with multiple forming ram assemblies, upper die and lower die are divided into at least two forming regions one by one, the size specification of forming ram assembly arranged in adjacent forming region is not identical, upper die and lower die are divided into multiple forming regions, different forming regions are configured with different specifications of forming ram assembly, forming region for processing thick plate adopts large-diameter ram forming ram assembly, forming region for processing thin plate adopts small-diameter ram forming ram assembly, compared with full domain using equal-diameter ram, when processing different specifications of plate, it is not necessary to replace all rams integrally, only need to match forming ram assembly specification by partition as needed, simplify process, greatly improve die versatility and production processing efficiency, reduce die replacement and adaptation cost.

Description

Technical Field

[0001] This invention relates to the field of multi-point forming equipment technology, and in particular to a multi-region integrated multi-point forming machine. Background Technology

[0002] A multi-point forming machine is a processing device that uses an array of pressure heads to apply pressure in a coordinated manner to achieve flexible three-dimensional curved surface forming of sheet metal. By replacing the traditional fixed mold surface with an adjustable pressure head array, it can achieve rapid forming of various types of complex curved steel sheets. In the multi-point forming process, the selection of the pressure head diameter directly determines the stress state of the sheet metal during forming, the accuracy of the curved surface contour, the surface forming quality, and the service life of the equipment. It is a core key parameter affecting the sheet metal forming pass rate and process stability.

[0003] Existing multi-point forming machines generally adopt a uniform pressure head layout across the entire area, that is, all pressure heads of the same diameter are arranged in an array for the entire mold. For thick steel plates with greater thickness, large-diameter pressure heads are usually selected for forming, while for thin steel plates with less thickness, small-diameter pressure heads are usually selected for forming.

[0004] For thick steel plate forming, thick plates inherently possess high bending stiffness and require high forming loads for plastic deformation. Under constant forming load conditions, a large-diameter indenter can effectively increase the contact area of ​​the plate, significantly reducing single-point contact pressure. This avoids defects such as plate surface indentation, pressure point residue, localized work hardening, and microcracks caused by excessive local pressure during thick plate forming. Simultaneously, it effectively reduces the indenter's bearing load, preventing failures such as edge chipping, wear, and breakage under high-pressure conditions with a small indenter, thus extending the mold's service life. Secondly, thick plates are rigid, and localized single-point stress can easily lead to surface distortion, localized indentations, and forming step defects. A large-diameter indenter provides a wider contact coverage, resulting in a smoother and more continuous stress transition on the plate, effectively improving the uniformity of fit and contour forming accuracy of large-curvature surfaces in thick plates. Furthermore, the arc-shaped contact surface of the large-diameter indenter effectively weakens stress concentration at the indenter edge, reducing the risk of cracking and edge splitting during the stretching and bending forming process of thick plates, and improving the forming limit of the plate. In addition, the contact areas of the large pressure head matrix can overlap and cover each other, effectively eliminating the problem of matrix imprint superposition caused by the forming of dense small pressure heads, and reducing the subsequent polishing and repair process of the board surface.

[0005] For thin steel sheet forming, which is characterized by its small thickness, extremely low bending stiffness, and significant elastic rebound, and because thin sheet workpieces often feature irregular curved surfaces, small radius corners, and streamlined decorative structures, requiring high precision in forming details, small-diameter indenters are conventionally more suitable. Firstly, large-diameter indenters have an excessively large contact area, and applying pressure at a single point can easily cause large-scale collapse and localized over-deformation of the thin sheet, smoothing out subtle curved surfaces and leading to a loss of precision in complex shapes. Small-diameter indenters, on the other hand, offer precise and controllable contact ranges, allowing for fine-tuned shaping point by point, accurately replicating the complex curved surfaces and narrow radius corners of the thin sheet. Secondly, the forming load required for the plastic deformation of thin sheets is extremely low. Small-diameter indenters can concentrate localized pressure, quickly overcoming the elastic deformation of the thin sheet, achieving stable plastic forming, and effectively reducing forming rebound. If a large indenter is used, the contact pressure is insufficient under the same driving force, resulting in only elastic bending of the thin sheet, with a large rebound after unloading, failing to guarantee forming stability. Third, thin sheet irregular structures often have narrow bends, narrow grooves, and forming areas with extremely small curvature. Small-diameter pressure heads have less spatial interference and can adapt to the processing requirements of narrow forming areas. At the same time, small pressure heads can achieve higher density dot matrix arrangement, forming uniform support over the entire area of ​​the thin sheet, effectively suppressing instability defects such as bulges, waves, wrinkles, and local warping that occur during the forming process of thin sheets, and improving the flatness of the sheet surface.

[0006] However, existing technologies are limited to a "uniform pressure head specification" forming mode, which can only match the corresponding pressure head specification to complete the forming process for purely thick or purely thin plate workpieces, resulting in significant technical limitations. Furthermore, single-specification pressure head molds have poor versatility; for workpieces of different thicknesses and structures, all pressure heads must be replaced entirely, leading to cumbersome changeover processes, low production efficiency, and high mold adaptation costs. This makes it impossible to achieve integrated, high-precision, and defect-free forming of workpieces with composite thicknesses. Summary of the Invention

[0007] In order to overcome the shortcomings of the existing technology, the present invention provides a multi-region integrated multi-point molding machine.

[0008] The technical solution adopted by this invention to solve its technical problem is: a multi-region integrated multi-point molding machine, comprising: frame; Both the upper and lower molds are mounted on the frame. The upper mold is mounted on the frame in a lifting and lowering manner via a lifting drive structure. Both the upper and lower dies are equipped with multiple sets of forming pressure head assemblies; The upper mold and the lower mold are divided into at least two forming areas, and the forming pressure head assemblies set in adjacent forming areas are of different sizes and specifications. Each of the molding areas is square in shape and the molding areas are joined together.

[0009] Preferably, in each of the forming regions, the forming head assemblies are arranged in multiple rows, with adjacent rows of forming head assemblies being staggered.

[0010] Preferably, along the column direction, multiple sets of connecting positioning support columns are provided between adjacent forming areas. The multiple sets of connecting positioning support columns are respectively embedded into the forming areas on both sides and are in close contact with the forming pressure head assembly.

[0011] Preferably, the forming head assembly includes a forming head assembly, a positioning support screw sleeve, a drive screw, and a drive motor. The forming head assembly is disposed above the positioning support screw sleeve. The upper part of the drive screw is threadedly connected to the screw sleeve in the positioning support screw sleeve, and the lower end of the drive screw is connected to the drive motor. The positioning support screw sleeves of adjacent forming head assemblies fit together. The forming head assemblies in adjacent forming areas are of different sizes.

[0012] Preferably, the forming pressure head assembly includes a pressure head base, a large pressure head, and multiple small pressure heads. The large pressure head is disposed on the pressure head base, and the multiple small pressure heads are evenly distributed on the large pressure head. The large pressure head is oscillatingly disposed on the pressure head base via a ball head structure or a magnetic attraction structure, and the small pressure heads are oscillatingly disposed on the large pressure head via a ball head structure or a magnetic attraction structure.

[0013] The beneficial effects of this invention are as follows: Compared with the prior art, the upper and lower molds are divided into multiple forming areas, and different forming head assemblies of different specifications are configured for different forming areas. The forming area for processing thick plates uses forming head assemblies with large-diameter heads, and the forming area for processing thin plates uses forming head assemblies with small-diameter heads. Compared with using equal-diameter heads throughout, when processing plates of different specifications, it is not necessary to replace all the heads as a whole. Only the forming head assembly specifications are matched according to the required areas, which simplifies the process, greatly improves the versatility of the mold and the production efficiency, and reduces the cost of mold replacement and adaptation. Attached Figure Description

[0014] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 This is a perspective view of the lower mold in an embodiment of the present invention; Figure 3 This is a top view of the lower mold in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a perspective view of the molding head assembly in an embodiment of the present invention; Figure 6 This is a perspective view of the forming pressure head assembly in an embodiment of the present invention.

[0015] In the diagram, 10 is the frame; 20 is the upper mold; 30 is the lower mold; 40 is the forming area; 50 is the forming head assembly; 51 is the forming head assembly; 52 is the head seat; 53 is the large head; 54 is the small head; 55 is the positioning support sleeve; 56 is the drive screw; 57 is the drive motor; and 61 is the connecting positioning support column. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] As attached Figure 1-6 As shown, the present invention provides a multi-region integrated multi-point molding machine, comprising: Rack 10; The upper mold 20 and the lower mold 30 are both mounted on the frame 10. The upper mold 20 is mounted on the frame 10 in a lifting and lowering manner through a lifting drive structure. Both the upper die 20 and the lower die 30 are equipped with multiple forming pressure head assemblies 50; The upper mold 20 and the lower mold 30 are divided into at least two forming areas 40 in a one-to-one correspondence. The forming pressure head assemblies 50 set in adjacent forming areas 40 are of different sizes. In this embodiment, three forming areas 40 are set. Each molding area 40 is square in shape, and the molding areas 40 are joined together, so that the upper mold 20 and the lower mold 30 can be set with molding areas 40 according to different processing requirements.

[0018] Specifically, during production and processing, the appropriate forming area 40 can be selected to process the sheet material according to its thickness. Compared with existing technologies, the upper mold 20 and lower mold 30 are divided into multiple forming areas 40. Different forming areas 40 are equipped with forming pressure head assemblies 50 of different specifications. The forming area 40 used for processing thick plates uses forming pressure head assemblies 50 with large-diameter pressure heads to reduce contact pressure, avoid dents, micro-cracks, and pressure head wear and breakage, and improve the forming accuracy of thick plate curved surfaces. The forming area used for processing thin plates uses forming pressure head assemblies 50 with small-diameter pressure heads to accurately replicate narrow rounded corners and fine curved surfaces, suppressing defects such as wrinkles, springback, and collapse of thin plates. Compared with using equal-diameter pressure heads throughout, when processing different specifications of sheet materials, it is not necessary to replace all pressure heads. Only the specifications of forming pressure head assemblies 50 need to be matched according to the required areas, simplifying the process, greatly improving the versatility of molds and production efficiency, reducing mold replacement and adaptation costs, thereby greatly improving the applicability of a single multi-point forming machine, so that enterprises do not need to purchase multi-point forming machines of different specifications and models.

[0019] The partitioned square splicing makes the layout more regular, and the forces on each formed area do not interfere with each other.

[0020] Furthermore, in each forming area 40, the forming pressure head assembly 50 is arranged in multiple rows, and the adjacent two rows of forming pressure head assemblies 50 are staggered. Through the staggered distribution, the lateral support between the rows can be effectively improved, and it can be avoided that during the forming process, a single forming pressure head assembly 50 will be horizontally offset due to the force of the component force, which will affect the forming effect of the board and prevent defects such as dents, stripes, and ripples from appearing on the surface of the board.

[0021] Furthermore, in order to better connect two adjacent forming areas 40, multiple sets of connecting positioning support columns 61 are provided between adjacent forming areas 40 along the column direction. The multiple sets of connecting positioning support columns 61 are embedded into the forming areas 40 on both sides and are in close contact with the forming head assembly 50. The connecting positioning support columns 61 provide lateral support for the forming head assembly 50 at the edge of the two adjacent forming areas 40.

[0022] Furthermore, the forming head assembly 50 includes a forming head assembly 51, a positioning support screw sleeve 55, a drive screw 56, and a drive motor 57. The forming head assembly 51 is positioned above the positioning support screw sleeve 55. The upper part of the drive screw 56 is threadedly connected to the screw sleeve in the positioning support screw sleeve 55, and the lower end of the drive screw 56 is connected to the drive motor 57. The drive motor 57 drives the drive screw 56 to rotate, which in turn drives the forming head assembly 51 to be adjusted. The positioning support screw sleeves 55 of adjacent forming head assemblies 50 are in close contact with each other. The forming head assemblies 50 are positioned in adjacent forming areas 40. The forming pressure head assemblies 51 have different sizes and specifications. The forming pressure head assembly 51 includes a pressure head base 52, a large pressure head 53, and multiple small pressure heads 54. The large pressure head 53 is set on the pressure head base 52, and the multiple small pressure heads are evenly distributed on the large pressure head 53. The large pressure head 53 is oscillatingly set on the pressure head base 52 through a ball head structure or a magnetic attraction structure, and the small pressure heads 54 are oscillatingly set on the large pressure head 53 through a ball head structure or a magnetic attraction structure. The multiple oscillating small pressure heads 54 can disperse the support points, increase the effective contact area, reduce local compressive stress, and avoid pressure damage or local deformation of the sheet material.

[0023] When a ball-head structure is used, a ball socket can be set on the pressure head seat 52, a ball head rod can be set at the bottom of the large pressure head 53, and the ball head of the ball head rod can be embedded in the ball socket; when a magnetic structure is used, a hemispherical groove can be set on the pressure head seat 52, a hemispherical protrusion can be set at the bottom of the large pressure head 53, the hemispherical protrusion can be movably fitted in the hemispherical groove, and magnets can be embedded in the pressure head seat 52 and the large pressure head 53 to connect the two through magnetic attraction.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A multi-region integrated multi-point molding machine, characterized in that, include: Rack (10); The upper mold (20) and the lower mold (30) are both set on the frame (10). The upper mold (20) is set on the frame (10) in a lifting and lowering manner through a lifting drive structure. Both the upper mold (20) and the lower mold (30) are provided with multiple forming pressure head assemblies (50); The upper mold (20) and lower mold (30) are divided into at least two forming areas (40) in a one-to-one correspondence, and the forming pressure head assemblies (50) set in adjacent forming areas (40) are of different sizes; Each of the molding areas (40) is square in shape, and the molding areas (40) are joined together.

2. The multi-region integrated multi-point molding machine according to claim 1, characterized in that, In each of the forming areas (40), the forming head assemblies (50) are arranged in multiple rows, and the adjacent two rows of forming head assemblies (50) are staggered.

3. The multi-region integrated multi-point molding machine according to claim 2, characterized in that, Along the column direction, multiple sets of connecting positioning support columns (61) are provided between adjacent forming areas (40). The multiple sets of connecting positioning support columns (61) are embedded into the forming areas (40) on both sides respectively, and are closely attached to the forming head assembly (50).

4. The multi-region integrated multi-point molding machine according to claim 1, characterized in that, The forming head assembly (50) includes a forming head assembly (51), a positioning support screw sleeve (55), a drive screw (56), and a drive motor (57). The forming head assembly (51) is positioned above the positioning support screw sleeve (55). The upper part of the drive screw (56) is threadedly connected to the screw sleeve in the positioning support screw sleeve (55), and the lower end of the drive screw (56) is connected to the drive motor (57). The positioning support screw sleeves (55) of adjacent forming head assemblies (50) fit together.

5. The multi-region integrated multi-point molding machine according to claim 4, characterized in that, The forming head assembly (51) includes a head seat (52), a large head (53) and multiple small heads (54). The large head (53) is disposed on the head seat (52), and the multiple small heads are evenly distributed on the large head (53).

6. The multi-region integrated multi-point molding machine according to claim 5, characterized in that, The large pressure head (53) is oscillatingly mounted on the pressure head seat (52), and the small pressure head (54) is oscillatingly mounted on the large pressure head (53).

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