High-precision sheet metal structural part high-efficiency forming device and process

Abstract

The application relates to the technical field of sheet metal processing, in particular to a high-precision sheet metal structural part efficient forming equipment and process. The high-precision sheet metal structural part efficient forming equipment comprises an outer die mechanism, an inner die mechanism and an adjusting mechanism. The outer die mechanism comprises a bottom plate and a plurality of bending assemblies. Each bending assembly comprises a first forming rod, a second forming rod and a third forming rod. The plurality of first forming rods form a forming cavity. The inner die mechanism comprises a multi-sided frame. The outer die mechanism has a first state and a second state. The plate is placed on the first forming rod, and the multi-sided frame presses the plate into the forming cavity. The adjusting mechanism changes the outer die mechanism from the first state to the second state, and the plate is bent and formed. During work, the plate does not need to be moved, and the forming precision is higher. Meanwhile, the four sides can be bent synchronously, and the efficiency is higher. The application provides a high-precision sheet metal structural part efficient forming equipment and process, so as to solve the problems of low bending efficiency and influence on forming precision of the existing bending machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet metal processing, in particular to a high-precision sheet metal structural part forming equipment and process. BACKGROUND

[0002] Sheet metal forming equipment is a very extensive field, which refers to a mechanical equipment used for making metal sheet into the required shape and size through shearing, stamping, bending, stretching and other processing methods. The bending machine is a machine that can bend thin plates. Its structure mainly includes a support, a workbench and a clamping plate. The workbench is placed on the support and is composed of a base and a pressing plate. The base is connected to the clamping plate through a hinge and is composed of a seat shell, a coil and a cover plate. The coil is placed in the recess of the seat shell, and the recess top is covered with a cover plate. When in use, the coil is energized by a lead wire, and after energization, an electromagnetic force is generated, which generates an attractive force on the pressing plate, thereby realizing the clamping of the thin plate between the pressing plate and the base. Because of the use of electromagnetic force clamping, the pressing plate can be made into shapes that meet the requirements of various workpieces, and it can also process workpieces with side walls, and the operation is also very simple. The bending machine applies pressure to the plate through the upper die (punch) and the lower die (V-shaped groove), so that the plate undergoes plastic deformation, thereby obtaining the desired angle and shape.

[0003] The existing bending equipment is difficult to bend plates of different specifications (length and width) and different thicknesses, and usually needs to replace different bending dies, which has poor adaptability. Near the bending angle, the plate material will have stress concentration, and at the same time, a small tensile or compressive displacement will be generated, which will cause the material to be drawn and deformed, and will gradually cause the accumulation of die wear.

[0004] The invention patent with publication number CN111775431B provides a bending machine, which realizes the bending of FPC plate products during the rotation of the rotating shaft and the bending assembly. However, this device needs to bend the FPC plate one by one edge by edge, which has low bending efficiency, and errors are easily introduced during the edge changing process due to repeated positioning, affecting the forming precision. SUMMARY

[0005] The present application provides a high-precision sheet metal structural part forming equipment and process to solve the problems of the existing bending machine, which bends the plate edge by edge, has low bending efficiency, affects the forming precision, and has poor adaptability.

[0006] The high-precision sheet metal structural part forming equipment and process of the present application adopts the following technical scheme: a high-precision sheet metal structural part forming equipment includes a support, an outer die mechanism, an inner die mechanism and an adjusting mechanism. The outer die mechanism includes a bottom plate and a plurality of bending assemblies, and the bottom plate is horizontally arranged on the support.

[0007] Each bending assembly comprises first, second and third profiled bars which are parallel to each other. The first profiled bars of the plurality of bending assemblies are arranged end to end and form a cavity. The first, second and third profiled bars are all horizontally arranged triangular prisms. One rectangular side of the first profiled bar is a first side, one rectangular side of the second profiled bar is a second side, and one rectangular side of the third profiled bar is a third side. One side of the first side is hingedly connected to the base plate. The other side of the first side is hingedly connected to one side of the second side. One side of the third side is hingedly connected to the other side of the second side.

[0008] The outer mold mechanism has a first state and a second state. In the first state, the first, second and third sides are arranged in the same horizontal plane. In the second state, the second and third profiled bars are arranged in the cavity, the first and third sides are arranged perpendicularly, and the second side is arranged horizontally.

[0009] When the outer mold mechanism is in the first state, the plate is horizontally arranged on the first profiled bars. The inner mold mechanism comprises a polygonal frame which is matched with the cavity. The polygonal frame is arranged on the support in a sliding manner and is used to press the plate into the cavity. The adjusting mechanism is used to change the outer mold mechanism from the first state to the second state, so as to bend and form the plate.

[0010] Further, each first profiled bar, each second profiled bar and each third profiled bar comprises two movable blocks and at least one intermediate block. The intermediate block is arranged between the two movable blocks. The intermediate block and the movable blocks move synchronously, and the intermediate block is replaceable, so as to change the length of the first, second and third profiled bars.

[0011] Further, the adjusting mechanism comprises a total hydraulic cylinder and a plurality of adjusting assemblies. Each adjusting assembly corresponds to one bending assembly. Each adjusting assembly comprises a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder. The first hydraulic cylinder is connected to the base plate and the first profiled bar. The second hydraulic cylinder is connected to the first profiled bar and the second profiled bar. The third hydraulic cylinder is connected to the second profiled bar and the third profiled bar.

[0012] The total hydraulic cylinder is vertically arranged on the support. The base plate is arranged on the upper side of the total hydraulic cylinder and is fixedly connected to the extension end of the total hydraulic cylinder. The total hydraulic cylinder is arranged with hydraulic oil. The total hydraulic cylinder is used to supply oil to the first, second and third hydraulic cylinders. When the pressure in the total hydraulic cylinder reaches a first preset value, the first hydraulic cylinder is driven to extend. When the pressure in the total hydraulic cylinder reaches a second preset value, the second hydraulic cylinder is driven to extend. When the pressure in the total hydraulic cylinder reaches a third preset value, the third hydraulic cylinder is driven to extend. The first preset value is smaller than the second preset value, and the second preset value is smaller than the third preset value.

[0013] Further, the number of bending assemblies is four. Two first forming rods are sequentially distributed along a first direction and arranged along a second direction. The other two first forming rods are sequentially distributed along the second direction and arranged along the first direction. The first direction and the second direction are both horizontal directions and perpendicular to each other.

[0014] The bottom plate comprises a first adjusting plate, two second adjusting plates and two movable assemblies. The two movable assemblies are sequentially distributed along a first direction, and each movable assembly comprises two support blocks sequentially distributed along a second direction. The two second adjusting plates are sequentially distributed along the first direction, and each second adjusting plate is arranged along the second direction. Each second adjusting plate and the two support blocks in a movable assembly are in sliding connection, and the second adjusting plate and the support blocks can slide relative to each other in the second direction. The first adjusting plate and the two second adjusting plates are in sliding connection, and the first adjusting plate and the second adjusting plates can slide relative to each other in the first direction.

[0015] Further, a first bidirectional threaded rod is fixedly arranged on each second adjusting plate and arranged along the second direction. The two ends of the first bidirectional threaded rod are in threaded transmission cooperation with the two support blocks in each movable assembly. A second bidirectional threaded rod is arranged on the first adjusting plate and arranged along the first direction. The two ends of the second bidirectional threaded rod are in threaded transmission cooperation with the two second adjusting plates.

[0016] Further, each movable block and each intermediate block comprises two connecting blocks, and the two connecting blocks can move close to or away from each other, for adjusting the size of the area enclosed by the first side and the second side.

[0017] Further, the outer mold mechanism comprises a moving block, and the moving block is slidably arranged on the bracket. The moving block is in the middle of the polygonal frame. The polygonal frame comprises four L-shaped frames, two first connecting rods sequentially distributed along the second direction and two second connecting rods sequentially distributed along the first direction. The first connecting rods are arranged along the first direction, and the second connecting rods are arranged along the second direction. The four L-shaped frames are sequentially distributed along the circumference of the moving block. The two ends of each first connecting rod abut against one end of two L-shaped frames. The two ends of each second connecting rod abut against the other end of two L-shaped frames.

[0018] A plurality of fourth hydraulic cylinders are fixedly arranged on the moving block. The fourth hydraulic cylinders are vertically arranged. One fifth hydraulic cylinder is arranged on each L-shaped frame, each first connecting rod and each second connecting rod. The fifth hydraulic cylinders are horizontally arranged and fixedly connected with the elongated ends of the fourth hydraulic cylinders.

[0019] Further, each L-shaped frame comprises a first connecting frame and a second connecting frame arranged in a vertical direction. Each first connecting rod and each second connecting rod comprises two fixed rods arranged in a vertical direction.

[0020] The outer mold mechanism further comprises a plurality of vertically arranged sixth hydraulic cylinders, each first connecting frame and a second connecting frame being connected by a sixth hydraulic cylinder.

[0021] Further, the moving block comprises a fixed block and two sliding blocks. A seventh hydraulic cylinder is vertically arranged on the support. The fixed block is fixedly arranged on the seventh hydraulic cylinder. The two sliding blocks are arranged on both sides of the fixed block along the first direction. The two sliding blocks can move close to or away from each other.

[0022] A high-efficiency forming process of a high-precision sheet metal structural part comprises the following steps:

[0023] S1, in the initial state, the outer mold mechanism is in the first state. The plate is horizontally placed on the first forming rod, and the first side, the second side and the third side are all in contact with the plate.

[0024] S2, the multi-sided frame moves downward, and the multi-sided frame enters the cavity and presses the plate into the cavity.

[0025] S3, the adjusting mechanism changes the outer mold mechanism from the first state to the second state, and then the plate is bent and formed.

[0026] The beneficial effects of the present application are: a high-efficiency forming equipment of a high-precision sheet metal structural part, comprising an outer mold mechanism, an inner mold mechanism and an adjusting mechanism. In the initial state, the outer mold mechanism is in the first state. The plate is horizontally placed on the first forming rod, and the first side, the second side and the third side are all in contact with the plate. The multi-sided frame moves downward, and the multi-sided frame enters the cavity and presses the plate into the cavity. The adjusting mechanism changes the outer mold mechanism from the first state to the second state, and then the plate is bent and formed. A high-efficiency forming equipment of a high-precision sheet metal structural part, when the plate is bent, the plate does not need to move, and the forming precision is higher. At the same time, the four sides can be bent synchronously, and the efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 A structure diagram of a high-efficiency forming equipment of a high-precision sheet metal structural part provided by the present application is provided.

[0029] Figure 2A front view of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0030] Figure 3 A front view of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application; Figure 2 A sectional view of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0031] Figure 4 A front view of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application; Figure 3 An enlarged view of the position C in the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0032] Figure 5 A sectional view of the outer mold mechanism of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0033] Figure 6 An exploded view of the outer mold mechanism of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0034] Figure 7 A schematic view of the outer mold mechanism of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application from another perspective;

[0035] Figure 8 A front view of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application; Figure 6 An enlarged view of the position C in the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0036] Figure 9 A schematic view of the inner mold mechanism of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0037] Figure 10 A sectional view of the inner mold mechanism of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0038] Figure 11 A front view of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application; Figure 10 An enlarged view of the position D in the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0039] Figure 12 A schematic view of the first state of the outer mold mechanism of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application;

[0040] Figure 13 A schematic view of the inner mold mechanism of the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiment of the present application after moving.

[0041] In the figure: 100, first forming rod; 101, first side; 102, third connecting block; 103, fourth connecting block; 104, second screw rod; 110, second forming rod; 111, second side; 112, seventh connecting block; 113, eighth connecting block; 114, fourth screw rod; 120, third forming rod; 121, third side; 200, total hydraulic cylinder; 210, first hydraulic cylinder; 220, second hydraulic cylinder; 230, third hydraulic cylinder; 240, telescopic rod; 300, supporting block; 310, first adjusting plate; 311, second bidirectional threaded rod; 320, second adjusting plate; 321, first bidirectional threaded rod; 400, moving block; 401, fixed block; 402, sliding block; 410, L-shaped frame; 411, first connecting frame; 412, second connecting frame; 420, first connecting rod; 421, first round corner rod; 422, first fixed rod; 423, second fixed rod; 430, second connecting rod; 431, second round corner rod; 432, third fixed rod; 433, fourth fixed rod; 440, fourth hydraulic cylinder; 450, fifth hydraulic cylinder; 460, sixth hydraulic cylinder; 470, seventh hydraulic cylinder; 480, fifth screw rod; 500, first movable block; 510, second movable block; 520, third movable block; 540, first intermediate block; 550, second intermediate block; 560, third intermediate block. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] Referring to Figures 1 to 13 As shown in the figure, the high-efficiency forming equipment for high-precision sheet metal structural parts provided by the embodiments of the present application comprises a support, an outer mold mechanism, an inner mold mechanism and an adjusting mechanism. The outer mold mechanism comprises a bottom plate and a plurality of bending assemblies, the bottom plate is horizontally arranged on the support;

[0044] Each bending assembly comprises first forming rods 100, second forming rods 110 and third forming rods 120 which are parallel to each other; the first forming rods 100 in the plurality of bending assemblies abut at the ends and form a forming cavity. The first forming rods 100, the second forming rods 110 and the third forming rods 120 are all horizontally arranged triangular prisms. One rectangular side of the first forming rod 100 is the first side 101, one rectangular side of the second forming rod 110 is the second side 111, and one rectangular side of the third forming rod 120 is the third side 121.

[0045] Each second forming rod 110 and each third forming rod 120 correspond to one first forming rod 100 respectively, and are parallel to the corresponding first forming rod 100. One side of the first side surface 101 is hinged to the bottom plate. The other side of the first side surface 101 is hinged to one side of the second side surface 111. One side of the third side surface 121 is hinged to the other side of the second side surface 111.

[0046] The outer mold mechanism has a first state and a second state. In the first state, the first side surface 101, the second side surface 111 and the third side surface 121 are in the same horizontal plane. In the second state, the second forming rod 110 and the third forming rod 120 are in the cavity, the first side surface 101 and the third side surface 121 are arranged vertically, and the second side surface 111 is arranged horizontally.

[0047] When the outer mold mechanism is in the first state, the plate is placed horizontally on the first forming rod 100. The inner mold mechanism includes a multi-sided frame matched with the cavity, which is slidably arranged on the support and used to press the plate into the cavity. The adjusting mechanism is used to change the outer mold mechanism from the first state to the second state, thereby bending the plate into shape.

[0048] In the initial state, the outer mold mechanism is in the first state. The plate is placed horizontally on the first forming rod 100, and the first side surface 101, the second side surface 111 and the third side surface 121 all abut against the plate. The multi-sided frame moves downward, enters the cavity and presses the plate into the cavity. The adjusting mechanism changes the outer mold mechanism from the first state to the second state, thereby bending the plate into shape. When the plate is bent, the plate does not need to move, and the forming precision is higher. At the same time, the four sides can be bent synchronously, and the efficiency is higher.

[0049] In this embodiment, the number of bending assemblies is four; two first forming rods 100 are arranged along the first direction in sequence and along the second direction. The other two first forming rods 100 are arranged along the second direction in sequence and along the first direction. The first direction and the second direction are both horizontal directions and perpendicular to each other.

[0050] Each first forming rod 100 includes two first movable blocks 500 and at least one first intermediate block 540. The two first movable blocks 500 are arranged in sequence along the extension direction of the first forming rod 100. The first intermediate block 540 is between the two first movable blocks 500. The first intermediate block 540 moves synchronously with the first movable blocks 500, and the first intermediate block 540 is replaceable.

[0051] Each second forming rod 110 comprises two second movable blocks 510 and at least one second intermediate block 550. The two second movable blocks 510 are sequentially distributed along the extension direction of the second forming rod 110 where the two second movable blocks 510 are located. The second intermediate block 550 is between the two second movable blocks 510. The second intermediate block 550 and the second movable blocks 510 move synchronously, and the second intermediate block 550 is replaceable.

[0052] Each third forming rod 120 comprises two third movable blocks 520 and at least one third intermediate block 560. The two third movable blocks 520 are sequentially distributed along the extension direction of the third forming rod 120 where the two third movable blocks 520 are located. The third intermediate block 560 is between the two third movable blocks 520. The third intermediate block 560 and the third movable blocks 520 move synchronously, and the third intermediate block 560 is replaceable.

[0053] In the embodiment, the adjusting mechanism comprises a total hydraulic cylinder 200, a plurality of telescopic rods 240, a plurality of first hydraulic cylinders 210, a plurality of second hydraulic cylinders 220 and a plurality of third hydraulic cylinders 230. Each first hydraulic cylinder 210 is connected with the base plate and one first movable block 500. Each second hydraulic cylinder 220 is connected with one first movable block 500 and one second movable block 510 which are adjacent. Each third hydraulic cylinder 230 is connected with one second movable block 510 and one third movable block 520 which are adjacent.

[0054] The total hydraulic cylinder 200 is vertically arranged on the support, the base plate is on the upper side of the total hydraulic cylinder 200 and is fixedly connected with the extension end of the total hydraulic cylinder 200. The total hydraulic cylinder 200 is arranged with hydraulic oil, and the total hydraulic cylinder 200 is arranged with a first main oil pipe, a second main oil pipe and a third main oil pipe. The first main oil pipe is arranged with a plurality of first auxiliary oil pipes, each first auxiliary oil pipe is communicated with one first hydraulic cylinder 210. The second main oil pipe is arranged with a plurality of second auxiliary oil pipes, each second auxiliary oil pipe is communicated with one second hydraulic cylinder 220. The third main oil pipe is arranged with a plurality of third auxiliary oil pipes, each third auxiliary oil pipe is communicated with one third hydraulic cylinder 230.

[0055] The first main oil pipe is arranged with a first overflow valve, when the pressure in the total hydraulic cylinder 200 reaches a first preset value, the hydraulic oil in the total hydraulic cylinder 200 is discharged through the first overflow valve. When the pressure in the total hydraulic cylinder 200 reaches a second preset value, the hydraulic oil in the total hydraulic cylinder 200 is discharged through a second overflow valve. When the pressure in the total hydraulic cylinder 200 reaches a third preset value, the hydraulic oil in the total hydraulic cylinder 200 is discharged through a third overflow valve. The first preset value is less than the second preset value, and the second preset value is less than the third preset value. The telescopic rod 240 is vertically arranged, and the telescopic rod 240 is connected with the base plate and the support.

[0056] In the embodiment, the bottom plate comprises a first adjusting plate 310, two second adjusting plates 320 and two movable assemblies. The two movable assemblies are sequentially distributed along a first direction, and each movable assembly comprises two support blocks 300 sequentially distributed along a second direction. Two first movable blocks 500 in each first forming rod 100 are respectively rotationally arranged on the two support blocks 300. And the first movable blocks 500 are located at the upper side of the first forming rod 100.

[0057] The second adjusting plate 320 is located at the lower side of the support block 300. The two second adjusting plates 320 are sequentially distributed along the first direction. Each second adjusting plate 320 is arranged along the second direction. Each second adjusting plate 320 and the two support blocks 300 in a movable assembly are slidingly connected, and the second adjusting plate 320 and the support block 300 can slide relative to each other in the second direction.

[0058] The first adjusting plate 310 is located at the lower side of the second adjusting plate 320. The first adjusting plate 310 and the two second adjusting plates 320 are slidingly connected, and the first adjusting plate 310 and the second adjusting plate 320 can slide relative to each other in the first direction.

[0059] In the embodiment, a first bidirectional threaded rod 321 is fixedly arranged on each second adjusting plate 320, and the first bidirectional threaded rod 321 is arranged along the second direction. A first limiting block is arranged on each support block 300. The two first limiting blocks are respectively located at the two ends of the first bidirectional threaded rod 321 and threadedly drive the first bidirectional threaded rod 321.

[0060] The first adjusting plate 310 is provided with a second bidirectional threaded rod 311 on each side along the second direction, and the second bidirectional threaded rod 311 is arranged along the first direction. Each second adjusting plate 320 is provided with two second limiting blocks, and the two second limiting blocks are sequentially distributed along the second direction. The two ends of each second bidirectional threaded rod 311 are threadedly connected with the second limiting blocks on the two second adjusting plates 320.

[0061] In the embodiment, each first movable block 500 comprises a first connecting block and a second connecting block. The first connecting block and the second connecting block are connected by a first screw rod. The first connecting block and the second connecting block can approach or move away from each other. Each first intermediate block 540 comprises a third connecting block 102 and a fourth connecting block 103. The third connecting block 102 and the fourth connecting block 103 are connected by a second screw rod 104. The third connecting block 102 and the fourth connecting block 103 can approach or move away from each other.

[0062] Each second movable block 510 comprises a fifth connecting block and a sixth connecting block. The fifth connecting block and the sixth connecting block are connected by a third screw rod. The fifth connecting block and the sixth connecting block can move close to or away from each other. Each second intermediate block 550 comprises a seventh connecting block 112 and an eighth connecting block 113. The seventh connecting block 112 and the eighth connecting block 113 are connected by a fourth screw rod 114. The seventh connecting block 112 and the eighth connecting block 113 can move close to or away from each other. The first connecting block, the third connecting block 102, the fifth connecting block and the seventh connecting block 112 are all triangular prisms.

[0063] When the outer mold mechanism is in the second state, the first connecting block and the second connecting block are arranged in sequence along the direction from top to bottom. The third connecting block 102 and the fourth connecting block 103 are arranged in sequence along the direction from top to bottom. The fifth connecting block and the sixth connecting block are arranged in sequence along the direction gradually away from the cavity. The seventh connecting block 112 and the eighth connecting block 113 are arranged in sequence along the direction gradually away from the cavity.

[0064] In the embodiment, the outer mold mechanism comprises a movable block 400 which is arranged on the bracket in a sliding manner. The movable block 400 is in the middle of the polygonal frame. The polygonal frame comprises four L-shaped frames 410, two first connecting rods 420 arranged in sequence along the second direction and two second connecting rods 430 arranged in sequence along the first direction. The first connecting rod 420 is arranged along the first direction, and the second connecting rod 430 is arranged along the second direction. The four L-shaped frames 410 are arranged in sequence along the circumference of the movable block 400. The two ends of each first connecting rod 420 abut one end of two L-shaped frames 410. The two ends of each second connecting rod 430 abut the other end of two L-shaped frames 410.

[0065] A plurality of fourth hydraulic cylinders 440 are fixedly arranged on the movable block 400. The fourth hydraulic cylinders 440 are arranged vertically. One fifth hydraulic cylinder 450 is arranged on each L-shaped frame 410, each first connecting rod 420 and each second connecting rod 430. The fifth hydraulic cylinder 450 is arranged horizontally and fixedly connected to the extension end of the fourth hydraulic cylinder 440.

[0066] In the embodiment, each L-shaped frame 410 comprises a first connecting frame 411 and a second connecting frame 412. The first connecting frame 411 and the second connecting frame 412 are arranged in sequence along the direction from top to bottom. Each first connecting rod 420 comprises a first fixed rod 422 and a second fixed rod 423. The first fixed rod 422 and the second fixed rod 423 are arranged in sequence along the direction from top to bottom. Each second connecting rod 430 comprises a third fixed rod 432 and a fourth fixed rod 433. The third fixed rod 432 and the fourth fixed rod 433 are arranged in sequence along the direction from top to bottom.

[0067] Two first rounded bars 421 are arranged on the upper surface of each first fixed bar 422 and each third fixed bar 432. The two first rounded bars 421 on the first fixed bar 422 are arranged along the second direction in sequence and along the first direction. The two first rounded bars 421 on the third fixed bar 432 are arranged along the first direction in sequence and along the second direction.

[0068] One second rounded bar 431 is arranged on each second fixed bar 423 and each fourth fixed bar 433 close to one side of the plate. The second rounded bars 431 on the second fixed bars 423 are arranged along the first direction. The second rounded bars 431 on the fourth fixed bars 433 are arranged along the second direction.

[0069] Arc surfaces are arranged on the first rounded bars 421 and the second rounded bars 431, which are used to contact the plate. The first rounded bars 421 form the rounded corners of the first fixed bars 422 and the third fixed bars 432. The second rounded bars 431 form the rounded corners of the second fixed bars 423 and the fourth fixed bars 433. The first rounded bars 421 and the second rounded bars 431 can be replaced to adapt to different required radii of the rounded corners of the plate.

[0070] The outer mold mechanism further comprises a plurality of vertically arranged sixth hydraulic cylinders 460. Each first connecting frame 411 and each second connecting frame 412 are connected by one sixth hydraulic cylinder 460. Each first fixed bar 422 and each second fixed bar 423 are connected by one sixth hydraulic cylinder 460. Each third fixed bar 432 and each fourth fixed bar 433 are connected by one sixth hydraulic cylinder 460.

[0071] In the embodiment, the moving block 400 comprises a fixed block 401 and two sliding blocks 402. A seventh hydraulic cylinder 470 is vertically arranged on the support. The fixed block 401 is fixedly arranged on the seventh hydraulic cylinder 470. At least one fifth screw 480 is rotatably arranged on the fixed block 401. The fifth screw 480 is arranged along the first direction. The two sliding blocks 402 are arranged along the first direction in sequence. The two sliding blocks 402 and the fifth screw 480 are threadedly driven.

[0072] A high-efficiency forming process of a high-precision sheet metal structure comprises the following steps:

[0073] S1, in the initial state, the outer mold mechanism is in the first state. The first side surface 101, the second side surface 111 and the third side surface 121 are in the same plane.

[0074] S2, the plate is horizontally placed on the first forming bar 100, so that the first side surface 101, the second side surface 111 and the third side surface 121 are all in contact with the plate. Then, the seventh hydraulic cylinder 470 is started, the seventh hydraulic cylinder 470 drives the moving block 400 and the polygonal frame to move downward. The polygonal frame enters the cavity and contacts the plate.

[0075] S3, after the multi-edge frame and the bottom plate are in contact, the multi-edge frame continues to move downward, extruding the total hydraulic cylinder 200, and the pressure in the total hydraulic cylinder 200 gradually increases. When the pressure in the total hydraulic cylinder 200 reaches a first preset value, the hydraulic oil in the total hydraulic cylinder 200 enters each first hydraulic cylinder 210 through the first overflow valve, the first main oil pipe and the first auxiliary oil pipe. The first hydraulic cylinder 210 pushes the first movable block 500 to move, so that the first side surface 101 is changed from horizontal to vertical state, and the plate is bent to form a first folded surface arranged vertically. The first movable block 500 drives the first intermediate block 540 to move synchronously. At this time, the second side surface 111 and the third side surface 121 are parallel to the first side surface 101 and are in a vertical state.

[0076] When the pressure in the total hydraulic cylinder 200 reaches a second preset value, the hydraulic oil enters each second hydraulic cylinder 220 through the second overflow valve, the second main oil pipe and the second auxiliary oil pipe. The second hydraulic cylinder 220 pushes the second movable block 510 to move, so that the second side surface 111 is changed from vertical to horizontal state, and the first folded surface is bent to form a second folded surface arranged horizontally. The second movable block 510 drives the second intermediate block 550 to move synchronously. At this time, the third side surface 121 and the second side surface 111 are arranged in parallel and are in a horizontal state.

[0077] When the pressure in the total hydraulic cylinder 200 reaches a third preset value, the hydraulic oil in the total hydraulic cylinder 200 enters each third hydraulic cylinder 230 through the third overflow valve, the third main oil pipe and the third auxiliary oil pipe. The third hydraulic cylinder 230 pushes the third movable block 520 to move, so that the third side surface 121 is changed from horizontal to vertical state, and the second folded surface is bent for the third time to form a third folded surface arranged vertically. The third movable block 520 drives the third intermediate block 560 to move synchronously. At this time, the outer mold mechanism is in a second state.

[0078] Then, the sixth hydraulic cylinder 460 is started, and the plurality of sixth hydraulic cylinders 460 drive the second connecting frame 412 to approach the first connecting frame 411, the second fixed rod 423 to approach the first fixed rod 422, and the fourth fixed rod 433 to approach the third fixed rod 432. So that the L-shaped frame 410, the first connecting rod 420 and the second connecting rod 430 can be separated from the bent plate.

[0079] Then, the fifth hydraulic cylinder 450 is started to be shortened, and the fifth hydraulic cylinder 450 drives the L-shaped frame 410, the first connecting rod 420 and the second connecting rod 430 to move towards the direction of approaching the fixed block 401, so that the L-shaped frame 410, the first connecting rod 420 and the second connecting rod 430 are separated from the bent plate. Finally, the bent plate is taken out, and the whole bending process is completed.

[0080] The high-precision sheet metal structure forming device can bend four edges of the plate synchronously without moving the plate, and has high forming precision and high efficiency.

[0081] The first screw, the second screw 104, the third screw and the fourth screw 114 can be rotated for different thicknesses of the plate. The first screw adjusts the distance between the first connecting block and the second connecting block, and the second screw 104 adjusts the distance between the third connecting block 102 and the fourth connecting block 103, so as to change the height of the first side surface 101 when the outer mold mechanism is in the second state. In addition, by adjusting the extension amount of the sixth hydraulic cylinder 460, the distance between the multi-edge frame and the second fold surface can also be adjusted.

[0082] The third screw adjusts the distance between the fifth connecting block and the sixth connecting block, and the fourth screw 114 adjusts the distance between the seventh connecting block 112 and the eighth connecting block 113. At the same time, by adjusting the extension distance of the fifth hydraulic cylinder 450, the distance between the multi-edge frame and the first fold surface, the third fold surface can be adjusted.

[0083] For different specifications (length and width) of the plate, the first bidirectional screw rod 321 and the second bidirectional screw rod 311 are rotated. The second bidirectional screw rod 311 adjusts the distance between the two first adjusting plates 310, thereby changing the distance between the two movable assemblies. The first bidirectional screw rod 321 adjusts the distance between the two supporting blocks 300 in each movable assembly. Then the corresponding first intermediate block 540, second intermediate block 550 and third intermediate block 560 are replaced to enclose a new cavity.

[0084] For a new cavity, the multi-edge frame needs to be adjusted accordingly. First, start the fourth hydraulic cylinder 440 connected with the first connecting rod 420 and the second connecting rod 430, drive the first connecting rod 420 and the second connecting rod 430 to move upwards first, so that the first connecting rod 420, the second connecting rod 430 and the L-shaped frame 410 are separated first. Then replace the first connecting rod 420 and the second connecting rod 430 with components suitable for the new specification.

[0085] Then, start the fifth hydraulic cylinder 450 connected with the L-shaped frame 410, and adjust the fifth screw 480 so that the two sliding blocks 402 move closer to or away from each other, thereby adjusting the four L-shaped frames 410 to a position matched with the new cavity. Subsequently, operate the fifth hydraulic cylinder 450 connected with the first connecting rod 420 and the second connecting rod 430 to adjust the new first connecting rod 420 and the second connecting rod 430 to a position corresponding to the new cavity. Finally, move the replaced first connecting rod 420 and the second connecting rod 430 downwards, and re-engage the L-shaped frame 410, to complete all adjustments.

[0086] The high-precision sheet metal structure forming device has higher adaptability and can bend plate materials with different thicknesses and different specifications.

[0087] The above merely describes preferred embodiments of the present application, but should not be used to restrict the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision sheet metal structure forming device, characterized in that: comprising a support, an outer mold mechanism, an inner mold mechanism and an adjusting mechanism; the outer mold mechanism comprises a bottom plate and a plurality of bending assemblies, and the bottom plate is horizontally arranged on the support; each bending assembly comprises a first forming rod, a second forming rod and a third forming rod which are parallel to each other; the first forming rods in the plurality of bending assemblies abut each other and form a forming cavity; the first forming rod, the second forming rod and the third forming rod are all horizontally arranged triangular prisms; one rectangular side of the first forming rod is a first side, one rectangular side of the second forming rod is a second side, and one rectangular side of the third forming rod is a third side; one side of the first side is hinged to the bottom plate; the other side of the first side is hinged to one side of the second side; one side of the third side is hinged to the other side of the second side; the outer mold mechanism has a first state and a second state; in the first state, the first side, the second side and the third side are in the same horizontal plane; in the second state, the second forming rod and the third forming rod are in the forming cavity, the first side and the third side are vertically arranged, and the second side is horizontally arranged; when the outer mold mechanism is in the first state, the plate is horizontally placed on the first forming rod; the inner mold mechanism comprises a polygonal frame matched with the forming cavity, the polygonal frame is slidably arranged on the support and is used to press the plate into the forming cavity; the adjusting mechanism is used to change the outer mold mechanism from the first state to the second state, so as to bend and form the plate.

2. The high-precision sheet metal structure forming device according to claim 1, characterized in that: each first forming rod, each second forming rod and each third forming rod comprises two movable blocks and at least one intermediate block; the intermediate block is between the two movable blocks, the intermediate block and the movable blocks move synchronously, and the intermediate block is replaceable to change the length of the first forming rod, the second forming rod and the third forming rod.

3. The high-precision sheet metal structure forming device according to claim 1, characterized in that: the adjusting mechanism comprises a total hydraulic cylinder and a plurality of adjusting assemblies; each adjusting assembly corresponds to a bending assembly; each adjusting assembly comprises a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder; the first hydraulic cylinder is connected to the bottom plate and the first forming rod; the second hydraulic cylinder is connected to the first forming rod and the second forming rod; the third hydraulic cylinder is connected to the second forming rod and the third forming rod; the total hydraulic cylinder is vertically arranged on the support, the bottom plate is on the upper side of the total hydraulic cylinder and is fixedly connected to the extension end of the total hydraulic cylinder; the total hydraulic cylinder is provided with hydraulic oil; the total hydraulic cylinder is used to supply oil to the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder; when the pressure in the total hydraulic cylinder reaches a first preset value, the first hydraulic cylinder is driven to extend; when the pressure in the total hydraulic cylinder reaches a second preset value, the second hydraulic cylinder is driven to extend; when the pressure in the total hydraulic cylinder reaches a third preset value, the third hydraulic cylinder is driven to extend; the first preset value is less than the second preset value, and the second preset value is less than the third preset value.

4. The high-precision sheet metal structure forming device according to claim 1, characterized in that: ​ The bending assembly is four in number; two first forming rods are sequentially distributed along a first direction and arranged along a second direction; the other two first forming rods are sequentially distributed along the second direction and arranged along the first direction; the first direction and the second direction are both horizontal directions and perpendicular to each other; The bottom plate comprises a first adjusting plate, two second adjusting plates and two movable assemblies; the two movable assemblies are sequentially distributed along a first direction; each movable assembly comprises two support blocks sequentially distributed along a second direction; the two second adjusting plates are sequentially distributed along the first direction; each second adjusting plate is arranged along the second direction; each second adjusting plate and the two support blocks in a movable assembly are in sliding connection; the second adjusting plate and the support block can slide relative to each other in the second direction; The first adjusting plate and the two second adjusting plates are in sliding connection; the first adjusting plate and the second adjusting plate can slide relative to each other in the first direction.

5. The high-efficiency forming equipment for high-precision sheet metal structural parts according to claim 4, characterized in that: A first bidirectional threaded rod is fixedly arranged on each second adjusting plate and arranged along the second direction; the two ends of the first bidirectional threaded rod are in threaded transmission cooperation with the two support blocks in each movable assembly, respectively; a second bidirectional threaded rod is arranged on the first adjusting plate and arranged along the first direction; the two ends of the second bidirectional threaded rod are in threaded transmission cooperation with the two second adjusting plates, respectively.

6. The high-efficiency forming equipment for high-precision sheet metal structural parts according to claim 2, characterized in that: Each movable block and each intermediate block comprises two connecting blocks; the two connecting blocks can approach or move away from each other, for adjusting the size of the area enclosed by the first side and the second side.

7. The high-efficiency forming equipment for high-precision sheet metal structural parts according to claim 4, characterized in that: The outer mold mechanism comprises a moving block; the moving block is slidably arranged on the support in an up-down direction; the moving block is in the middle of the multi-sided frame; the multi-sided frame comprises four L-shaped frames, two first connecting rods sequentially distributed along a second direction and two second connecting rods sequentially distributed along a first direction; the first connecting rods are arranged along the first direction; the second connecting rods are arranged along the second direction; the four L-shaped frames are sequentially distributed along the circumference of the moving block; the two ends of each first connecting rod abut against one end of two L-shaped frames; the two ends of each second connecting rod abut against the other end of two L-shaped frames; A plurality of fourth hydraulic cylinders are fixedly arranged on the moving block; the fourth hydraulic cylinders are vertically arranged; one fifth hydraulic cylinder is arranged on each L-shaped frame, each first connecting rod and each second connecting rod; the fifth hydraulic cylinders are horizontally arranged and fixedly connected with the elongated ends of the fourth hydraulic cylinders.

8. The high-efficiency forming equipment for high-precision sheet metal structural parts according to claim 7, characterized in that: Each L-shaped frame comprises a first connecting frame and a second connecting frame distributed in up and down; each first connecting rod and each second connecting rod comprises two fixed rods distributed in up and down; the outer mold mechanism further comprises a plurality of sixth hydraulic cylinders vertically arranged, each first connecting frame and a second connecting frame are connected by a sixth hydraulic cylinder; two fixed rods distributed in up and down are connected by a sixth hydraulic cylinder.

9. The high-efficiency forming device for high-precision sheet metal structural parts of claim 7, wherein: The moving block comprises a fixed block and two sliding blocks; the support is vertically provided with a seventh hydraulic cylinder; the fixed block is fixedly arranged on the seventh hydraulic cylinder; the two sliding blocks are arranged on the two sides of the fixed block along the first direction; and the two sliding blocks can move close to or away from each other.

10. A high-efficiency forming process of a high-precision sheet metal structural member using the high-efficiency forming apparatus for a high-precision sheet metal structural member according to any one of claims 1 to 9, characterized by, The method comprises the following steps: S1, in the initial state, the outer mold mechanism is in the first state; the plate is horizontally placed on the first forming rod, and the first side, the second side and the third side are all in contact with the plate; S2, the multi-sided frame moves downward, the multi-sided frame enters the cavity, and the plate is pressed into the cavity; S3, the adjusting mechanism changes the outer mold mechanism from the first state to the second state, so as to bend and form the plate.

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