Corner corrugated plate forming device

Abstract

The present invention relates to the technical field of forming devices, and in particular to a corner corrugated plate forming device, comprising a first die frame, a second die frame, a female die, a male die, and a blank holder device. The second die frame is arranged opposite the first die frame; the female die is disposed on the first die frame, the female die forms first outwardly protruding structures, and a groove-shaped structure is formed between the two outwardly protruding structures; the male die is disposed on the second die frame, and the male die forms a second outwardly protruding structure; and the blank holder device comprises a first blank holder block and a second blank holder block, inwardly recessed structures being respectively formed on the first blank holder block and the second blank holder block. The corner corrugated plate forming device provided in the present invention has a simple structure and is convenient to operate, thereby facilitating use by an operator, and completes the forming process in a single station, thus improving the production efficiency. During forming, at the position where the male die is located, no female die is in contact with a plate material, so as not to impose any constraint on the male die, such that a corner corrugated plate has a novel central shape with a smooth transition, and exhibits resistance to deformation, thereby reducing the thinning rate of the product, and enhancing the energy absorption performance of the central shape.

Description

Corner Corrugated Plate Forming Device Technical Field

[0001] This invention relates to the field of forming equipment technology, and in particular to a corner corrugated plate forming device. Background Technology

[0002] The storage of liquefied natural gas (LNG) often requires large-scale storage facilities. Currently, the multi-layer corrugated plates of membrane-type LNG containment systems need to maintain good sealing and deformation resistance. The smoothness, gloss, energy absorption and stability of the shape of the corner corrugated plates should meet the usage requirements. The corner corrugated plates are mainly formed by stamping, which places high requirements on the forming quality of the corrugated plate parts.

[0003] Currently, the forming equipment for 135° corner corrugated plates has the drawbacks of complex structure and cumbersome operation; moreover, after the stamping is completed at the first station, it is transferred to the next station for further processing, which poses safety risks to the operators and increases the manufacturing cycle of the formed parts, resulting in low efficiency. Summary of the Invention

[0004] This invention provides a corner corrugated plate forming device to solve the defects of existing forming devices, such as complex structure, cumbersome operation, safety risks to operators, increased manufacturing cycle of formed parts, and low efficiency.

[0005] This invention provides a corner corrugated plate forming device, comprising:

[0006] First mold frame;

[0007] The second mold frame is arranged opposite to the first mold frame in the height direction;

[0008] A concave mold is disposed on the first mold frame. The two ends of the concave mold respectively form a first convex structure with a set angle, and a groove structure is formed between the two convex structures.

[0009] A punch is disposed on the second mold frame, and the die surface portion of the punch forms a second outward convex structure at a set angle;

[0010] The edge-pressing device is mounted on the second mold frame via an elastic mechanism. The edge-pressing device includes a first edge-pressing block and a second edge-pressing block. The first edge-pressing block is located on one side of the punch, and the second edge-pressing block is located on the other side of the punch. The first edge-pressing block and the second edge-pressing block are respectively formed with concave structures adapted to the first convex structure.

[0011] According to the corner corrugated plate forming apparatus provided by the present invention, the projection line of the first convex structure on the plane defined by the longitudinal direction and the height direction is an convex shape with a set angle, and the intersection of the two lines is a rounded transition.

[0012] The groove structure is a non-penetrating rectangular sink groove with a rounded transition extending from the first convex structure on a plane defined by the transverse and longitudinal directions.

[0013] Near the center of the rectangular sinkhole, there is a circular arc sinkhole that is symmetrical about a plane defined by the lateral and vertical directions, and the circular arc sinkhole has a rounded transition with the first convex structure and the connection part that does not penetrate the rectangular sinkhole.

[0014] According to the corner corrugated plate forming apparatus provided by the present invention, the projection lines of the concave structures of the first pressing block and the second pressing block on the planes defined by the longitudinal direction and the height direction are concave shapes with a set angle, and the intersection of the two lines is a circular arc transition.

[0015] The corner corrugated plate forming apparatus provided by the present invention further includes: a plurality of positioning blocks;

[0016] The first pressing block or the second pressing block has at least two positioning blocks on its first side, and the first pressing block and the second pressing block each have at least one positioning block on their second side, and the first side and the second side are adjacent right-angled sides.

[0017] Each of the positioning blocks protrudes along the height direction from the die surface of the first or second pressing block.

[0018] According to the corner corrugated plate forming apparatus provided by the present invention, the punch includes: a first punch, a second punch, and a third punch;

[0019] The first punch and the third punch are arranged radially symmetrically about the plane defined by the second punch in the longitudinal and height directions, and both of their die surfaces are convex arched. The angle between the projections of the first punch and the third punch onto the plane defined by the longitudinal and height directions is the set angle.

[0020] The second punch has a convex, arc-shaped surface.

[0021] The corner corrugated plate forming apparatus provided by the present invention further includes: a first guiding device disposed on the second mold frame and connected and / or in contact with the first pressing block and the second pressing block, for guiding the moving direction of the first pressing block and the second pressing block.

[0022] According to the corner corrugated plate forming apparatus provided by the present invention, the first guiding device includes:

[0023] A fixing plate is provided at one end on the second mold frame and is located on one side of the first pressing block or the second pressing block;

[0024] A self-lubricating guide plate is disposed on the fixed plate, and the self-lubricating guide plate contacts the first pressing block or the second pressing block on the opposite side connected to the fixed plate.

[0025] Bushing, provided on the second mold frame;

[0026] The unloading screw has its shank inserted into the bushing and transitionally fitted with the bushing, and its threaded portion connected to the threaded hole of the first pressure block and / or the second pressure block.

[0027] The corner corrugated plate forming apparatus provided by the present invention further includes: a second guiding device disposed between the first mold frame and the second mold frame, for guiding the relative movement direction of the first mold frame and the second mold frame.

[0028] According to the corner corrugated plate forming apparatus provided by the present invention, the second guiding device includes:

[0029] Multiple guide pillars, one end of which is connected to the second mold frame;

[0030] Multiple guide sleeves, one end of which is connected to the first mold frame, and the other end of which is transitionally fitted to the other end of the guide post.

[0031] The corner corrugated plate forming apparatus provided by the present invention further includes: a frame disposed on the second mold frame;

[0032] The frame is a mesh structure formed by multiple horizontal ribs and multiple vertical ribs. The punch is located on the vertical rib near the center in the horizontal direction, and the bushing is located on the horizontal rib away from the center in the vertical direction.

[0033] This invention provides a corner corrugated plate forming device, comprising: a first mold frame, a second mold frame, a die, a punch, and a pressing device. The second mold frame is arranged opposite to the first mold frame in the height direction; the die is disposed on the first mold frame, and its two ends respectively form a first outward convex structure at a set angle, with a groove structure formed between the two outward convex structures; the punch is disposed on the second mold frame, and the die surface of the punch forms a second outward convex structure at a set angle; the pressing device is disposed on the second mold frame through an elastic mechanism, and the pressing device includes: a first pressing block and a second pressing block, wherein the first pressing block is disposed on one side of the punch, and the second pressing block is disposed on the other side of the punch, and the first pressing block and the second pressing block respectively form an inward concave structure adapted to the first outward convex structure. The present invention provides a corner corrugated plate forming device, which has a simple structure, is easy to operate, and is convenient for operators to use. Moreover, the device can complete the above forming process in one station, which greatly improves production efficiency. At the same time, due to the existence of the groove structure, there is no concave die to contact the plate at the position of the punch during forming, which constrains it. This results in a novel shape in the middle of the produced corner corrugated plate with a smooth transition, which has a certain resistance to deformation and reduces the thinning rate of the product to a certain extent. In addition, the irregularity of the middle shape also enhances the energy absorption of the middle shape. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 is a perspective view of the corner corrugated plate forming device provided by the present invention;

[0036] Figure 2 is a perspective view of the first mold frame provided by the present invention;

[0037] Figure 3 is a perspective view of the concave mold provided by the present invention;

[0038] Figure 4 is a perspective view of the first pressing block provided by the present invention;

[0039] Figure 5 is a perspective view of the second pressing block provided by the present invention;

[0040] Figure 6 is a perspective view of the second mold frame provided by the present invention;

[0041] Figure 7 is a perspective view of the positioning block provided by the present invention;

[0042] Figure 8 is a perspective view of the connecting plate provided by the present invention;

[0043] Figure 9 is a perspective view of the fixing plate provided by the present invention;

[0044] Figure 10 is a perspective view showing the mounting relationship between the first guiding device and the male punch provided by the present invention;

[0045] Figure 11 is a perspective view of the bushing and the unloading screw provided by the present invention;

[0046] Figure 12 is a perspective view of the first male punch provided by the present invention;

[0047] Figure 13 is a perspective view of the second male punch provided by the present invention;

[0048] Figure 14 is a perspective view of the third male punch provided by the present invention;

[0049] Figure 15 is a perspective view showing the mounting relationship between the nitrogen gas spring and the fixing block provided by the present invention.

[0050] Reference numerals: 1. Female die; 2. First die set; 3. Second die set; 6. Positioning block; 7. Second guiding device; 8. First guiding device; 91. First screw; 92. Second screw; 93. Third screw; 94. Fourth screw; 95. Fifth screw; 10. Cylindrical pin; 11. Flat key; 12. Spacer block; 13. Lifting hook; 31. Rectangular plate structure; 32. "Tian"-shaped mesh structure frame; 321. First transverse rib; 322. Second transverse rib; 323. Third transverse rib; 324. First longitudinal rib; 325. Second longitudinal rib; 326. Third longitudinal rib; 41. First male punch; 42. Second male punch; 43. Third male punch; 51. First blank holder block; 52. Second blank holder block; 53. Unloading screw; 54. Nitrogen gas spring; 55. Fixing block; 56. Connecting plate; 71. Guide post; 72. Guide bushing; 81. Guide plate guiding structure; 82. Unloading screw guiding structure; 811. Fixing plate; 812. Self-lubricating guide plate; 821. Bushing. Detailed Description of the Embodiments

[0051] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this embodiment.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this embodiment, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this embodiment, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0055] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] The following description, in conjunction with Figures 1-15 (for ease of description, the directions D1 and D2 are shown as the longitudinal direction of the device, and D3 is the height direction; these directions are merely schematic representations and not structural limitations of the device), describes a corner corrugated plate forming device of the present invention. This corner corrugated plate forming device includes: a first mold frame 2, a second mold frame 3, a concave mold 1, a convex mold, and a pressing device, etc.

[0057] The second mold frame 3 and the first mold frame 2 are arranged opposite each other in the height direction; the die 1 is set on the first mold frame 2, and the two ends of the die 1 respectively form a first convex structure with a set angle, and a groove structure is formed between the two convex structures; the punch is set on the second mold frame 3, and the die surface of the punch forms a second convex structure with a set angle; the pressing device is set on the second mold frame 3 through an elastic mechanism, and the pressing device includes: a first pressing block 51 and a second pressing block 52, and the first pressing block 51 is set on one side of the punch, and the second pressing block 52 is set on the other side of the punch, and the first pressing block 51 and the second pressing block 52 respectively form an inner concave structure adapted to the first convex structure.

[0058] Specifically, the first mold frame 2 is the upper mold frame, and the second mold frame 3 is the lower mold frame opposite to it. The die 1 is installed on the bottom surface of the first mold frame 2, and the punch can be installed on the top surface of the second mold frame 3 through the elastic mechanism on the frame. The first pressing block 51 and the second pressing block 52 are respectively installed on both sides of the punch.

[0059] The first convex structures at both ends of the die 1 correspond to the first pressing block 51 and the second pressing block, respectively, while the groove structure in the middle corresponds to the position of the punch. The first convex structure and the inner concave structure process the stainless steel sheet into a specific angle during the forming process. At the same time, due to the presence of the groove structure, there is no contact between the die 1 and the sheet material at the position of the punch during forming to constrain it. This results in a novel shape in the middle of the produced corner corrugated plate with a smooth transition, a certain degree of resistance to deformation, and a reduction in the thinning rate of the product to a certain extent. In addition, the irregularity of the middle shape also enhances the energy absorption of the middle shape.

[0060] Furthermore, the first convex structure, the second convex structure, and the concave structure are all designed and processed to the same specific angle to process the corner corrugated plate. The corner corrugated plate forming device of this embodiment can be applied to the forming of 135° corner corrugated plates. Therefore, the first convex structure, the second convex structure, and the concave structure are all 135°.

[0061] During the forming process, the stainless steel sheet is placed on the first pressing block 51 and the second pressing block 52. The pressure device applies external force to the first mold frame 2, causing the die 1 to descend. The stainless steel sheet is then pressed against the die 1, the first pressing block 51, and the second pressing block 52, thus folding the stainless steel sheet from a flat surface to a specific angle (in this embodiment, the stainless steel sheet is folded to 135°). The die 1 continues to move downward with the pressure device until the stainless steel sheet is pressed against the die 1 and the punch surface, thus completing the forming of the stainless steel corner corrugated plate.

[0062] The present invention provides a corner corrugated plate forming device, comprising: a first mold frame 2, a second mold frame 3, a die 1, a punch, and a pressing device. The second mold frame 3 is arranged opposite to the first mold frame 2 in the height direction; the die 1 is disposed on the first mold frame 2, and the two ends of the die 1 respectively form a first outward convex structure with a set angle, and a groove structure is formed between the two outward convex structures; the punch is disposed on the second mold frame 3, and the die surface of the punch forms a second outward convex structure with a set angle; the pressing device is disposed on the second mold frame 3 through an elastic mechanism, and the pressing device includes: a first pressing block 51 and a second pressing block 52, wherein the first pressing block 51 is disposed on one side of the punch, and the second pressing block 52 is disposed on the other side of the punch, and the first pressing block 51 and the second pressing block 52 respectively form an inward concave structure adapted to the first outward convex structure. The present invention provides a corner corrugated plate forming device, which has a simple structure, is easy to operate, and is convenient for operators to use. Moreover, the device can complete the above forming process in one station, which greatly improves production efficiency. At the same time, due to the existence of the groove structure, there is no concave die 1 to contact the plate material and constrain it at the position of the punch during forming. This makes the produced corner corrugated plate have a novel shape in the middle and a smooth transition, which has a certain resistance to deformation and reduces the thinning rate of the product to a certain extent. At the same time, the irregularity of the middle shape also enhances the energy absorption of the middle shape.

[0063] In one embodiment of the present invention, as shown in FIG2, the first mold frame 2 is a cuboid structure with a total of 8 countersunk holes, 2 of which are arranged at the center line and 6 countersunk holes are symmetrically arranged outside the center position. The lower surface of the first mold frame 2 is suspended by the first screw 91 to form the die 1. The mounting surface of the first mold frame 2 is provided with a pin hole and a keyway, which are positioned by a cylindrical pin 10 and a flat key 11. On the two transverse sides, two U-shaped grooves are symmetrically arranged along the transverse center line respectively. Four circular through holes are symmetrically arranged at the center of the four corners of the first mold frame 2 for fitting with the guide sleeve 72. The guide sleeve 72 and the circular through holes are interference fit.

[0064] In one embodiment of the invention, the projection line of the first convex structure onto a plane defined by the longitudinal and height directions is a convex shape with a set angle, and the intersection of the two lines is a rounded transition. The groove structure is a non-penetrating rectangular groove extending from the first convex structure on a plane defined by the transverse and longitudinal directions, with a rounded transition. A rounded groove symmetrical about the plane defined by the transverse and height directions is arranged near the center of the rectangular groove, and the connection between the rounded groove and the first convex structure and the non-penetrating rectangular groove is a rounded transition.

[0065] Specifically, as shown in Figure 3, the die 1 is an integral component fixed on the first mold frame 2. It has eight threaded holes on its mounting surface, two at the center line and six countersunk holes symmetrically arranged outside the center. It also has one pin hole and one keyway. Two rectangular slots penetrating in the height direction are arranged on one longitudinal side, symmetrical about the plane defined by the die 1 in the transverse and height directions. The projection line of the die surface on the plane defined by the longitudinal and height directions is a convex shape with an included angle of 135°, and the intersection of the two lines is rounded. On the plane defined by the transverse and longitudinal directions of the die 1, a non-penetrating rectangular countersunk groove with an arc starting from the die surface is arranged. At the middle position of the die surface, an arc-shaped countersunk groove symmetrical about the plane defined by the transverse and height directions is arranged. The arc-shaped countersunk groove surface transitions with the die surface and the non-penetrating rectangular countersunk groove portion at rounded corners.

[0066] In one embodiment of the present invention, the projection lines of the concave structures of the first pressing block 51 and the second pressing block 52 on the plane defined by the longitudinal direction and the height direction are concave shapes with a set angle, and the intersection of the two lines is a rounded transition.

[0067] Specifically, as shown in Figures 4-5 and 15, both the first pressing block 51 and the second pressing block 52 are concave in shape, with the concave structure serving as the pressing surface. The angle between the projection lines of the pressing surfaces of the two pressing blocks onto the plane defined by the longitudinal and height directions of the pressing blocks is 135°. The pressing surfaces of both pressing blocks terminate at a platform portion along both the longitudinal and height extension directions, with a smooth rounded transition between the pressing surface and the platform portion. Four threaded holes, symmetrical about the transverse centerline and longitudinal symmetry line of the pressing blocks, are respectively provided on the opposite sides of the pressing surfaces of the two pressing blocks. Simultaneously, two stepped blind holes, symmetrical about the transverse centerline of the pressing blocks, are respectively provided on the opposite sides of the pressing surfaces of the two pressing blocks for use by the elastic mechanism during compression. During the process, the cylinder avoids obstacles; the bottom of the cylinder of the elastic mechanism is fixed to the fixed block 55 by screws, and the fixed block 55 is fixed to the welded part of the second mold frame 3 by screws; the first pressing block 51 and the second pressing block 52 are connected by two connecting plates 56; the connecting plate 56 is a cuboid structure with two countersunk holes arranged on the center line along the transverse direction at both ends; the connecting plate 56 is fixed to the two pressing blocks by the fifth screw 95; below the countersunk holes of the connecting plate 56, a metal sheet with a through hole with a diameter larger than the screw diameter is arranged to avoid contact between the connecting plate 56 and the sides of the first punch and the third punch during the movement of the first pressing block 51 and the second pressing block 52, which would cause scratches on the mold.

[0068] The first pressing block 51 has four threaded holes on one horizontal surface after installation, two of which are arranged side by side in the horizontal direction and the other two are arranged side by side in the vertical direction; on the other horizontal surface, there are two threaded holes arranged in the horizontal direction for installing the fixed connecting plate 56.

[0069] The second pressing block 52, after installation, also has four threaded holes on a transverse plane coplanar with the transverse plane of the first pressing block 51, two of which are arranged side by side in the transverse direction and the other two are arranged side by side in the height direction. On another transverse plane coplanar with the transverse plane of the first pressing block 51, two threaded holes are arranged in the transverse direction. After installation, the second pressing block 52 has two rectangular grooves penetrating in the height direction on its outer surface perpendicular to the transverse plane with four threaded holes. Two threaded holes are arranged on the center lines of the two rectangular grooves. The two rectangular grooves and the threaded holes located in the rectangular grooves are symmetrical about the plane defined by the transverse and height directions of the second pressing block 52.

[0070] As shown in Figures 1, 4 and 5, after installation, the threaded holes of the first pressing block 51 and the second pressing block 52 arranged in the transverse plane are mirror-symmetrical about the second mold frame 3 in the plane defined by the longitudinal direction and the height direction.

[0071] In one embodiment of the present invention, the corner corrugated plate forming device further includes a plurality of positioning blocks 6. At least two positioning blocks 6 are provided on the first side of the first pressing block 51 or the second pressing block 52, and at least one positioning block 6 is provided on the second side of each of the first pressing block 51 and the second pressing block 52, with the first and second sides being adjacent right-angled sides; each positioning block 6 protrudes from the mold surface of the first pressing block 51 or the second pressing block 52 along its height direction. Specifically, by installing a plurality of positioning blocks 6 on the first pressing block 51 and the second pressing block 52, a rectangular right-angle limiting structure is formed, and the stainless steel sheet is attached to this right-angle limiting structure to position the initial position of the stainless steel sheet. Preferably, the positioning blocks 6 can be correspondingly embedded into the rectangular grooves of the first pressing block 51 and the second pressing block 52.

[0072] Preferably, as shown in Figure 7, the positioning block 6 is a cuboid structure with a missing corner and two countersunk holes arranged along its length. The positioning block 6 is fixed to the side of the pressing block by screws. One positioning block is arranged on one side of the first pressing block 51, one positioning block is arranged on the side of the second pressing block 52 that is coplanar with the mounting side of the first pressing block 51 after installation, and two positioning blocks are arranged on the outer side perpendicular to the mounting side of the second pressing block 52. The mounting surfaces of the four positioning blocks 6 can define a right-angled area for initial positioning of the stainless steel sheet.

[0073] In one embodiment of the present invention, the punch includes a first punch 41, a second punch 42, and a third punch 43. The first punch 41 and the third punch 43 are arranged radially symmetrically about the plane defined by the second punch 42 in the longitudinal and height directions, and both have outwardly convex arched mold surfaces. The included angle between the projections of the mold surfaces of the first punch 41 and the third punch 43 onto the plane defined by the longitudinal and height directions is a set angle; the mold surface of the second punch 42 is a circular arc convex surface.

[0074] Specifically, as shown in Figures 12-14 and 10, the punch has a split structure, including a first punch 41, a second punch 42, and a third punch 43, all fixed to the second longitudinal rib 325 of the frame; among them, the first punch 41 and the third punch 43 have the same structure, with the die surface being an outwardly convex arch shape, and the mounting surface having 4 threaded holes, 1 pin hole, and 1 keyway; the second punch 42 has a rectangular flange area at the bottom and a rounded solid at the top, with 4 threaded holes and 2 pin holes arranged on the mounting surface; among them, the first punch 41 and the third punch 42 have a split structure, including a first punch 41, a second punch 42, and a third punch 43, all fixed to the second longitudinal rib 325 of the frame; among them, the first punch 41 and the third punch 43 have the same structure, with the die surface being an outwardly convex arch shape, and the mounting surface having 4 threaded holes and 2 pin holes; among them, the first punch 41 and the third punch 43 have a split structure, including a first punch 41, a second punch 42, and a third punch 43, all fixed to the second longitudinal rib 325 of the frame ... The first punch 41 and the third punch 43 are positioned by pins and flat keys and fixed by four screws. They are installed in a mirror-symmetrical arrangement about the plane defined by the second mold frame 3 in the longitudinal and height directions and fixed on both sides of the second longitudinal rib 325. The second punch 42 is positioned by two pins and fixed by four screws and is installed in the middle position of the second longitudinal rib 325. After installation, the angle between the projection lines of the first punch 41 and the third punch 43 on the plane defined by the second mold frame 3 in the longitudinal and height directions is 135°.

[0075] Preferably, the edges of the die surfaces of the first punch 41, the second punch 42, and the third punch 43 are smoothly transitioned to the rounded corners of their sides.

[0076] In one embodiment of the present invention, the corner corrugated plate forming device further includes: a first guiding device 8, which is disposed on the second mold frame 3 and is connected to and / or in contact with the first pressing block 51 and the second pressing block 52, for guiding the movement direction of the first pressing block 51 and the second pressing block 52.

[0077] In one embodiment of the present invention, the first guiding device 8 includes a fixed plate 811 and a self-lubricating guide plate 812, forming a guide plate guiding structure 81. One end of the fixed plate 811 is disposed on the second mold frame 3 and is located on one side of the first pressing block 51 or the second pressing block 52; the self-lubricating guide plate 812 is disposed on the fixed plate 811, and the self-lubricating guide plate 812 contacts the first pressing block 51 or the second pressing block 52 on the side opposite to the fixed plate 811.

[0078] Specifically, as shown in Figure 8-11, the fixing plate 811 is a stepped solid structure with four countersunk holes symmetrically arranged along the center line of the height direction, and two threaded holes arranged along the center line, which are fixed to the second mold frame 3 by four fourth screws 94; the self-lubricating guide plate 812 has two countersunk holes and is fixed to the fixing plate 811 by two screws; the back side of the mounting surface of the self-lubricating guide plate 812 is in contact with the outer longitudinal plane of the first pressing block 51 and the second pressing block 52, and plays a guiding role during the movement of the pressing blocks.

[0079] In one embodiment of the present invention, the first guide device 8 includes a bushing 821 and a stripper screw 53, forming a stripper screw guide structure 82. The bushing 821 is disposed on the second mold frame 3; the shank of the stripper screw 53 is inserted into the bushing 821 and transitionally fitted with the bushing 821, and the threaded portion of the stripper screw 53 is connected to the threaded holes of the first pressure block 51 and / or the second pressure block 52.

[0080] Specifically, as shown in Figures 10 and 11, the bushing 821 is a rotary cylindrical component with a flange edge, which is interference-fitted with the countersunk holes installed on the first horizontal rib 321 and the third horizontal rib 323 of the frame; wherein, the shank of the unloading screw 53 passes through the center of the bushing 821, and the threaded part is fitted with the threaded hole arranged on the pressing face of the first pressing block 51 and the pressing face of the second pressing block 52, and the unloading screw 53 and the bushing 821 are in transition fit.

[0081] In one embodiment of the present invention, the corner corrugated plate forming device further includes: a second guiding device 7, disposed between the first mold frame 2 and the second mold frame 3, for guiding the relative movement direction of the first mold frame 2 and the second mold frame 3.

[0082] In one embodiment of the present invention, the second guiding device 7 includes a plurality of guide posts 71 and a plurality of guide sleeves 72. One end of the plurality of guide posts 71 is connected to the second mold frame 3; one end of the plurality of guide sleeves 72 is connected to the first mold frame 2, and the other end is transitionally fitted to the other end of the guide posts 71.

[0083] Specifically, both the guide post 71 and the guide sleeve 72 are rotary bodies; the guide post 71 is a bar material, which is interference-fitted on the second mold base 3; the guide sleeve 72 is a tube material, which is interference-fitted on the first mold base 2, and the guide post 71 and the guide sleeve 72 are transition fits.

[0084] In one embodiment of the present invention, the corner corrugated plate forming device further includes: a frame disposed on the second mold frame 3. The frame is a mesh structure formed by multiple transverse ribs and multiple longitudinal ribs, the punch is disposed on the longitudinal rib near the center position in the transverse direction, and the bushing 821 is disposed on the transverse rib away from the center position in the longitudinal direction.

[0085] Preferably, the frame forms a "tian"-shaped grid structure frame 32 with three transverse ribs and three longitudinal ribs, which is integrally welded at the center position of the rectangular plate-shaped structure 31 of the second die holder 3.

[0086] As shown in Figure 1 and Figure 6, the rectangular plate-shaped structure 31 has 4 U-shaped grooves symmetrically arranged along the transverse center line on two transverse sides, which are used for connecting the device with the lower working table of the pressure equipment; 4 circular through holes are symmetrically arranged at the center of the four corners; along the transverse center line, 6 countersunk holes for fixing the cushion blocks 12 and 4 threaded holes for fixing the lifting hooks 13 are symmetrically arranged on both sides respectively for matching installation with the guide posts 71, wherein an interference fit is adopted between the guide posts 71 and the circular through holes. Wherein, the cushion blocks 12 are fixed by second screws 92, and the lifting hooks 13 are fixed by third screws 93.

[0087] In the four "mouth"-shaped regions enclosed by the "field"-shaped mesh structure frame 32, a rectangular sinking groove with rounded corners is respectively arranged, wherein the plate for mounting and fixing the elastic mechanism (preferably nitrogen gas spring 54) is seated on the bottom of the sinking groove; at the bottom of the sinking groove, four threaded holes that are centered symmetric with respect to the rectangular sinking groove are respectively arranged, for mounting and fixing the plate of the nitrogen gas spring 54; wherein the four rounded rectangular sinking grooves are arranged centrally with respect to the cuboid plate-shaped structure 31; the "field"-shaped mesh structure frame 32 is formed by welding, and after welding, the whole comprises three transverse ribs (i.e., the first transverse rib 321, the second transverse rib 322 and the third transverse rib 323) and three longitudinal ribs (i.e., the first longitudinal rib 324, the second longitudinal rib 325 and the third longitudinal rib 326), wherein the three transverse ribs have equal width, the left and right two longitudinal ribs have equal width, and the second longitudinal rib 325 is the widest among the six ribs; wherein, eight threaded through holes symmetric about the center line are arranged on the outer surfaces of the left and right longitudinal ribs, for fixedly mounting the plate of the self-lubricating guide plate 812; and the left and right two longitudinal ribs are symmetric with respect to the plane defined by the longitudinal direction and the height direction of the cuboid plate-shaped structure 31, the upper and lower two transverse ribs are mirror symmetric with respect to the plane defined by the transverse direction and the longitudinal direction of the cuboid plate-shaped structure 31; the second longitudinal rib 325 is symmetric with respect to the longitudinal center line of the cuboid plate-shaped structure 31, and the second transverse rib 322 is symmetric with respect to the transverse center line of the cuboid plate-shaped structure 31; on the upper and lower two transverse ribs, four countersink holes that are centrally symmetric with respect to the cuboid plate-shaped structure 31 are respectively arranged, penetrating through the cuboid plate-shaped structure 31; wherein, the small diameter portion of the countersink hole is used for forming interference fit with the bushing 821, and the large diameter portion of the countersink hole reserves space for sliding of the unloading screw 53; on the second longitudinal rib 325, eight large countersink holes symmetrically arranged about the transverse center line of the cuboid plate-shaped structure 31 are used for fixing the first convex die 41 and the third convex die 43; four small countersink holes are used for fixing the second convex die 42; two pin holes and two flat key grooves are used for positioning the first convex die 41 and the third convex die 43; wherein the flat key functions to balance the lateral force; and two pin holes that are centrally symmetric with respect to the cuboid plate-shaped structure 31 are arranged, for positioning the second convex die 42.

[0088] Based on the structure of the above embodiment of the present apparatus, the working principle thereof is as follows:

[0089] A rectangular plate is placed on the upper platforms of the first blank holder 51 and the second blank holder 52, and with the right-angle side close to the positioning block 6 as the positioning edge, the plate is pressed against the mounting surface of the positioning block 6 to complete positioning.

[0090] Wherein, after installation, the topmost part of the positioning block 6 is 5-10 mm higher than the highest part of the first blank holder 51 and the second blank holder 52.

[0091] In the open mold state, the top of the self-lubricating guide plate 812 should be 5-10mm higher than the face of the first blank holder 51 and the second blank holder 52; the length of the rod of the selected unloading screw 53 should be shorter than the total length of the nitrogen spring 54 in the free state; that is, after installation, the nitrogen spring 54 is in a compressed pre-tightened state; there is a defined distance between the first punch 41 and the second punch 42, and between the third punch 43 and the second punch 42. After installation, the angle between the projection lines of the first punch 41 and the third punch 43 on the plane defined by the second mold base 3 in the longitudinal and height directions is 135°; wherein, the intersection of the extended projection lines should be lower than the second punch 42 in the plane defined by the second mold base 3 in the longitudinal and height directions. The highest point of the projection on the plane defined by the direction is a certain distance away; during the movement of the forming device, the die 1 moves down with the worktable of the pressure equipment, and completes the bonding of the stainless steel sheet with the die surface of the die 1 and the pressing surfaces of the first pressing block 51 and the second pressing block 52, so that the stainless steel sheet is folded from the plane to 135°; the die 1 continues to move down with the worktable of the pressure equipment until the stainless steel sheet is bonded with the die surface of the die 1, the first punch 41 and the third punch 43, and the forming of the stainless steel corner corrugated plate is completed; it should be noted that during the movement of the forming device, the back of the pressing surfaces of the first pressing block 51 and the second pressing block 52 contact the upper surface of the second mold frame 3, that is, the mold closing state of the forming device is achieved.

[0092] As can be seen, the corner corrugated plate forming device provided by this invention is simple to operate and easy for operators to use. This device can complete the forming process at one station, greatly improving production efficiency. Simultaneously, during forming, the second punch 42 is positioned without the die 1 contacting the plate to constrain it, resulting in a novel shape in the middle of the produced corner corrugated plate with a smooth transition, providing a certain degree of resistance to deformation; and reducing the product thinning rate to some extent. Furthermore, the irregularity of the middle shape also enhances its energy absorption capacity. This forming process employs three guiding devices (i.e., positioning block 6, first guiding device 8, and second guiding device 7), greatly improving the stability of the device's operation, ensuring consistency in product size and quality, and operational precision. The second mold frame 3 is a semi-enclosed box-type welded structure, innovative in form and stable in structure, further improving the stability and service life of the device. This forming structure is reasonable and improves production efficiency to a certain extent.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A corner corrugated plate forming device, characterized in that, include: First mold frame (2); The second mold frame (3) is arranged opposite to the first mold frame (2) in the height direction; A concave mold (1) is disposed on the first mold frame (2). The two ends of the concave mold (1) respectively form a first convex structure with a set angle, and a groove structure is formed between the two convex structures. A punch is disposed on the second mold frame (3), and the die surface portion of the punch forms a second outward convex structure with a set angle; The pressing device is mounted on the second mold frame (3) via an elastic mechanism. The pressing device includes a first pressing block (51) and a second pressing block (52). The first pressing block (51) is located on one side of the punch, and the second pressing block (52) is located on the other side of the punch. The first pressing block (51) and the second pressing block (52) are respectively formed with concave structures adapted to the first convex structure.

2. The corner corrugated plate forming device according to claim 1, characterized in that, The projection line of the first convex structure onto the plane defined by the longitudinal direction and the height direction is a convex shape with a set angle, and the intersection of the two lines is a rounded transition. The groove structure is a non-penetrating rectangular sink groove with a rounded transition extending from the first convex structure on a plane defined by the transverse and longitudinal directions. Near the center of the rectangular sinkhole, there is a circular arc sinkhole that is symmetrical about a plane defined by the lateral and vertical directions, and the circular arc sinkhole has a rounded transition with the first convex structure and the connection part that does not penetrate the rectangular sinkhole.

3. The cornered corrugated sheet forming apparatus according to claim 2, wherein The projection lines of the concave structures of the first pressing block (51) and the second pressing block (52) on the plane defined by the longitudinal direction and the height direction are concave shapes with a set angle, and the intersection of the two lines is a rounded transition.

4. The cornered corrugated sheet forming apparatus according to claim 2, wherein Also includes: Multiple positioning blocks (6); The first pressing block (51) or the second pressing block (52) is provided with at least two positioning blocks (6) on its first side, and the second pressing block (51) and the second pressing block (52) are respectively provided with at least one positioning block (6) on their second side, and the first side and the second side are adjacent right-angled sides; Each of the positioning blocks (6) protrudes along the height direction from the mold surface of the first pressing block (51) or the second pressing block (52).

5. The cornered corrugated sheet forming apparatus according to claim 1, wherein The punch includes: a first punch (41), a second punch (42), and a third punch (43); The first punch (41) and the third punch (43) are arranged radially symmetrically about the plane defined by the second punch (42) in the longitudinal and height directions, and the mold surfaces are all convex arched. The angle between the projections of the mold surfaces of the first punch (41) and the third punch (43) on the plane defined by the longitudinal and height directions is the set angle. The second punch (42) has a convex arc surface.

6. The cornered corrugated sheet forming apparatus according to any one of claims 1 to 5, characterized by Also includes: A first guiding device (8) is disposed on the second mold frame (3) and connected and / or in contact with the first pressing block (51) and the second pressing block (52), for guiding the movement direction of the first pressing block (51) and the second pressing block (52).

7. The cornered corrugated sheet forming apparatus according to claim 6, wherein The first guide device (8) includes: The fixing plate (811) is located on one side of the second mold frame (3) and is located on the side of the first pressing block (51) or the second pressing block (52). A self-lubricating guide plate (812) is disposed on the fixed plate (811), and the self-lubricating guide plate (812) contacts the first pressing block (51) or the second pressing block (52) on the opposite side connected to the fixed plate (811). Bushing (821) is provided on the second mold frame (3); The unloading screw (53) has its shank inserted into the bushing (821) and transitionally engaged with the bushing (821). The threaded portion of the unloading screw (53) is connected to the threaded hole of the first pressure block (51) and / or the second pressure block (52).

8. The cornered corrugated sheet forming apparatus according to any one of claims 1 to 5, characterized by Also includes: The second guiding device (7) is disposed between the first mold frame (2) and the second mold frame (3) and is used to guide the relative movement direction of the first mold frame (2) and the second mold frame (3).

9. The cornered corrugated sheet forming apparatus according to claim 8, wherein The second guide device (7) includes: Multiple guide pillars (71) are connected at one end to the second mold frame (3); Multiple guide sleeves (72) are connected at one end to the first mold frame (2) and at the other end to transition fit with the other end of the guide post (71).

10. The cornered corrugated sheet forming apparatus according to claim 7, wherein It also includes: a frame, which is disposed on the second frame (3); The frame is a mesh structure formed by multiple horizontal ribs and multiple vertical ribs. The punch is located on the vertical rib near the center in the horizontal direction, and the bushing (821) is located on the horizontal rib away from the center in the vertical direction.

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