CN117225988A - Large-size thin-wall box-type part composite forming device and method - Google Patents

Abstract

The invention discloses a large-size thin-wall box-shaped part composite forming device and a method, wherein the composite forming device comprises a support frame, a storage table and a clamping mechanism, an annular guide rail is fixedly arranged on the outer side of the storage table, a movable mounting frame is arranged at the top of the annular guide rail, a horizontal-vertical cutting assembly is arranged on the side surface of the movable mounting frame, and a movement output end of the horizontal-vertical cutting assembly is fixedly connected with a binding assembly and a shaping assembly respectively; the edge rolling assembly comprises a primary rolling flanging mechanism and a secondary rolling flanging mechanism, and the primary rolling flanging mechanism and the secondary rolling flanging mechanism realize secondary rolling forming of the edge part of the slab; the shaping and cutting mechanism performs press forming on the non-rolled part of the plate blank. The invention adopts a point-line forming mode and a rolling and blanking composite forming process, realizes the automatic integral seamless forming of the large-size thin-wall box-shaped part, has simple and reasonable equipment structural design, lower production and use cost and higher forming operation efficiency.

Description

Large-size thin-wall box-type part composite forming device and method

Technical Field

The invention relates to the technical field of metal plate stamping forming, in particular to a large-size thin-wall box-shaped part composite forming device and method.

Background

The large-size thin-wall box-shaped part is widely applied to the fields of aerospace, production and manufacturing, building construction and the like, for example, a building inner plate required for building construction is a typical box-shaped part, the common specification is 3000-9000 mm long, 500-800 mm wide, the height of a box-shaped part straight wall is 15-20 mm, and the thickness of an initial slab is 0.7-0.8 mm. According to the characteristics of the product, if the conventional box-shaped part forming processes such as stamping forming, liquid filling deep drawing forming and the like are adopted, the cost caused by the tonnage of stamping equipment and the specification of a stamping die is huge, and the technical difficulty is extremely high. Therefore, at present, square plate flanging is mostly adopted, but the left material is formed at four corners of the box-shaped piece, and cutting welding or edge folding rolling is needed.

However, with the continuous improvement of the requirements of the quality of the inner plates of the buildings in the world, the large-size thin-wall box-shaped parts are required to be seamless, welded and rolled without multilayer plates. Therefore, the need for an integrated forming device and method for large-sized thin-wall box-shaped parts is becoming more urgent and critical to the market share.

Disclosure of Invention

According to the large-size thin-wall box type part composite forming device and method, rolling flanging forming of four side edges of a large-size plate blank is completed through the forming assembly capable of moving along the annular guide rail, stamping and cutting forming of corners are achieved, and integral seamless forming of the large-size thin-wall box type part is achieved through a point-line forming mode and a rolling and blanking composite forming process.

In order to solve the technical problems, the invention adopts a technical scheme that:

the large-size thin-wall box-shaped part composite forming device comprises a supporting frame, a storage table fixedly arranged at the top of the supporting frame and a clamping mechanism fixedly arranged above the top surface of the storage table, wherein an annular guide rail is fixedly arranged at the outer side of the storage table, a movable mounting frame capable of horizontally moving along the annular guide rail is arranged at the top of the annular guide rail, a horizontal-vertical cutting assembly is arranged on the side surface of the movable mounting frame, and a binding assembly and a shaping assembly are respectively and fixedly connected with the movement output end of the horizontal-vertical cutting assembly;

the rolling and flanging assembly comprises a first horizontal longitudinal positioning mechanism and a first mounting frame fixedly mounted at the top of a motion output end of the first horizontal longitudinal positioning mechanism, wherein a primary rolling and flanging mechanism and a secondary rolling and flanging mechanism are fixedly mounted on one side, close to a storage table, of the first mounting frame respectively, the primary rolling and flanging mechanism rolls the edge part of a plate blank from a horizontal state to an inclined state, the secondary rolling and flanging mechanism continuously rolls the edge part of the plate blank from the inclined state to a vertical state, and in the secondary rolling process, non-rolling allowance is reserved at two ends of the edge part of the plate blank;

The shaping assembly comprises a second horizontal longitudinal positioning mechanism and a second mounting frame fixedly mounted at the top of a motion output end of the second horizontal longitudinal positioning mechanism, one side, close to the object placing table, of the second mounting frame is fixedly provided with a shaping and cutting mechanism, and the shaping and cutting mechanism performs stamping forming on an non-rolled part at the intersection of two adjacent edge parts of the slab.

Further, the rack is fixedly arranged on the outer side face of the annular guide rail, the traveling driving motor is fixedly arranged at the top of the movable mounting frame, a gear which is meshed with the rack is fixedly arranged at the output end of the traveling driving motor, and the inner wall of the movable mounting frame is fixedly provided with the stable sliding block which is slidably embedded in the annular guide rail.

Further, a plurality of travel control switches are arranged on the annular guide rail.

Further, the horizontal-vertical cutting assembly comprises a first vertical positioning mechanism fixedly installed on the side surface of the movable mounting frame, which is close to the object placing table, and a first horizontal transverse positioning mechanism fixedly installed on the side surface of the motion output end of the first vertical positioning mechanism, wherein the side surface of the motion output end of the first horizontal transverse positioning mechanism, which is close to the object placing table, is fixedly connected with a first horizontal transverse positioning plate, and the first horizontal longitudinal positioning mechanism and the second horizontal longitudinal positioning mechanism are respectively fixedly installed on two sides of the top surface of the first horizontal transverse positioning plate.

Further, the primary rolling flanging mechanism comprises a primary rolling flanging forming die fixedly arranged at the bottom of the first mounting frame and a primary rolling flanging forming feeding mechanism fixedly arranged at the top of the first mounting frame and positioned right above the primary rolling flanging forming die, one side, far away from the object placing table, of the top surface of the primary rolling flanging forming die is an inclined slope, and the motion direction of a power output end of the primary rolling flanging forming feeding mechanism is parallel to the slope;

the output end of the primary rolling flanging forming feeding mechanism is fixedly connected with a first roller frame plate, the inside of the first roller frame plate is respectively connected with an initial press roller and an inclined press roller positioned above the initial press roller in a rotating mode, the axis of the initial press roller is parallel to the movement direction of the movable mounting frame, and the axis of the inclined press roller is parallel to the movement direction of the power output end of the primary rolling flanging forming feeding mechanism.

Further, a first blank holder plate is fixedly arranged on one side of the first roller frame plate, and the bottom surface of the first blank holder plate is parallel to the top surface of the object placing table.

Further, the secondary rolling flanging mechanism comprises a secondary rolling flanging forming die fixedly arranged at the bottom of the first mounting frame and a secondary rolling flanging forming feeding mechanism fixedly arranged at the bottom of the first mounting frame and positioned at the outer side of the secondary rolling flanging forming die, a second roller frame plate which can be close to or far away from the secondary rolling flanging forming die is fixedly arranged at the motion output end of the secondary rolling flanging forming feeding mechanism, and at least one vertical compression roller is rotatably arranged at one end of the second roller frame plate close to the secondary rolling flanging forming die;

The side surface of the secondary rolling flanging forming die, which is far away from one side of the object placing table, is a vertical surface, and the axis of the vertical pressing roller is vertically arranged.

Further, the secondary roll-in flanging mechanism further comprises a second vertical positioning mechanism fixedly mounted on one side of the top of the first mounting frame, the bottom output end of the second vertical positioning mechanism is fixedly connected with a second blank holder positioned right above the secondary roll-in flanging forming die, and the bottom surface of the second blank holder is parallel to the top surface of the object placing table.

Further, the shaping and cutting mechanism comprises a shaping female die fixedly arranged on one side of the second mounting frame close to the top of the object placing table and positioned above the object placing table, and a second horizontal transverse positioning mechanism fixedly arranged on the second mounting frame and positioned below the shaping female die, wherein a shaping male die frame plate is fixedly connected to the side face of a motion output end of the second horizontal transverse positioning mechanism, and a pre-shaping assembly, a finishing assembly and a cutting edge assembly are respectively fixedly arranged on one side of the shaping male die frame plate close to the object placing table;

the shaping assembly comprises a shaping positioning mechanism and a shaping male die fixedly arranged at the top power output end of the shaping positioning mechanism, the finishing assembly comprises a finishing positioning mechanism and a finishing male die fixedly arranged at the top power output end of the finishing positioning mechanism, the trimming assembly comprises a trimming positioning mechanism and a trimming male die fixedly arranged at the top power output end of the trimming positioning mechanism, and the shaping male die, the finishing male die and the trimming male die can be respectively positioned under the shaping female die and matched with the shaping female die.

Further, a third vertical positioning mechanism is fixedly arranged at the top of the second mounting frame, and a cutting edge pressing plate positioned below the shaping female die is fixedly connected to the bottom power output end of the third vertical positioning mechanism.

The invention also provides a large-size thin-wall box-shaped part composite forming method which is applied to the large-size thin-wall box-shaped part composite forming device, and the composite forming method comprises the following steps:

s1: placing the slab on the table top of the object placing table accurately, and fixing and pressing the slab on the object placing table through a clamping mechanism, so that the flanging positions of the peripheral edges of the slab are positioned outside the edge of the table top of the object placing table;

s2: the movable mounting frame moves to a preset starting point position of a flanging forming part positioned at a certain side edge of the slab, the first horizontal longitudinal positioning mechanism drives the primary rolling flanging mechanism and the secondary rolling flanging mechanism to be close to the slab on the object placing table, and the horizontal-vertical position cutting assembly drives the primary rolling flanging mechanism and the secondary rolling flanging mechanism to move upwards to a rolling operation position;

s3: the primary rolling flanging mechanism works to finish primary partial rolling flanging at the preset starting point position of the flanging forming part of the side edge of the slab;

S4: the movable mounting frame moves horizontally and linearly, and continuously advances from a preset starting point position of a flanging forming part of the side edge of the plate blank to a preset ending point position of the flanging forming part of the side edge of the plate blank, and the one-time rolling flanging mechanism carries out continuous rolling flanging forming on the flanging forming part of the side edge of the plate blank in the synchronous horizontal linear movement process;

s5: after the primary rolling flanging mechanism leaves the preset starting point position of the flanging forming part of the side edge of the slab to a preset distance, the secondary rolling flanging mechanism works, the flanging forming part of the side edge of the slab in an inclined state after the primary rolling forming is subjected to secondary rolling flanging forming, and in the continuous rolling process of the primary rolling flanging mechanism, the secondary rolling flanging mechanism is tightly continuous rolling along with the step;

s6: after the movable mounting frame moves to the preset end point position of the flanging forming part of the side edge of the slab, stopping moving, wherein the primary rolling flanging mechanism and the secondary rolling flanging mechanism work reversely and reset, the horizontal-vertical position cutting assembly work reversely, the primary rolling flanging mechanism and the secondary rolling flanging mechanism are driven to move downwards and reset, and the first horizontal longitudinal positioning mechanism works reversely and drives the primary rolling flanging mechanism and the secondary rolling flanging mechanism to be away from the object placing table and reset;

S7: moving the movable mounting frame to the edge of the other side of the slab along the annular guide rail, and repeatedly executing the steps S2 to S6 until the rolling flanging forming of the edges of the four sides of the slab is completed, so as to obtain a middle forming piece;

s8: the movable mounting frame moves to one corner position of the middle forming piece along the annular guide rail, and the second horizontal longitudinal positioning mechanism drives the shaping and cutting mechanism to be close to the corner, so that the corner is positioned at the working position of the shaping and cutting mechanism;

s9: the shaping and cutting mechanism works, and the shaping part at the corner position is subjected to pre-shaping, fine shaping and cutting shaping sequentially through the switching of the working positions of the dies and the press fit;

s10: after the corner position is shaped, the shaping and cutting mechanism resets itself, and the second horizontal longitudinal positioning mechanism drives the shaping and cutting mechanism to be away from the corner and reset;

s11: the movable mounting frame moves to the other corner position of the middle forming piece along the annular guide rail; and repeating the steps S8 to S10 until all four corners of the middle forming piece are shaped, and obtaining the box-shaped piece.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, rolling flanging forming of four side edges of a large-size plate blank and stamping cutting forming of corners are completed through the forming assembly capable of advancing along the annular guide rail, and integral seamless forming of the large-size thin-wall box-shaped part is realized through a point-line forming mode and a rolling and blanking composite forming process, the structural design of equipment is simple and reasonable, the production and use cost is low, the problem of huge tonnage of stamping equipment and large specification of a stamping die in the conventional box-shaped part forming processes such as stamping forming, liquid-filled drawing forming and the like is avoided, and a non-integral structure caused by cutting welding or overlapping rolling of four corners of the box-shaped part in a square plate flanging forming mode is avoided;

According to the invention, the forming requirements from thin-wall slabs with different lengths and widths to the box-shaped part can be met by changing the length and width dimensions of the annular guide rail, the top surface dimension of the object placing table and the position control point setting of the movable mounting plate, so that the universality is better;

according to the invention, the starting position control point and the ending position control point of the moving track of the movable mounting plate are controlled to be matched with the corresponding preset logic control program, so that the secondary flanging operation of four edges of the plate blank and the extrusion forming operation of four corners of the middle forming piece can be automatically performed, the forming operation efficiency is higher, the degree of automation is higher, and the specification consistency of formed products is better.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a second perspective view of the present invention;

FIG. 3 is a schematic illustration of the forming process of the blank to box of the present invention;

FIG. 4 is a schematic perspective view of the mobile positioning assembly and forming assembly of the present invention;

FIG. 5 is a second perspective view of the overall structure of the mobile positioning assembly and the forming assembly of the present invention;

FIG. 6 is a schematic perspective view of a mobile positioning assembly according to the present invention;

FIG. 7 is a second perspective view of the mobile positioning assembly of the present invention;

FIG. 8 is a schematic cross-sectional view of a mobile positioning assembly of the present invention;

FIG. 9 is a schematic perspective view of a horizontal-vertical positioning assembly according to the present invention;

FIG. 10 is a schematic diagram showing a second perspective view of the horizontal-vertical dicing assembly according to the present invention;

FIG. 11 is a schematic perspective view of a binding assembly according to the present invention;

FIG. 12 is a second perspective view of the binding assembly of the present invention;

FIG. 13 is a schematic perspective view of a primary roll flanging mechanism;

FIG. 14 is a second perspective view of the primary roll flanging mechanism of the present invention;

FIG. 15 is a schematic view showing a perspective structure of a primary roll-flanging forming die of the present invention;

FIG. 16 is a schematic view showing a three-dimensional structure of a secondary roll flanging mechanism of the present invention;

FIG. 17 is a second perspective view of the secondary roll flanging mechanism of the present invention;

FIG. 18 is a schematic perspective view of a shaping assembly according to the present invention;

FIG. 19 is a second perspective view of the shaping assembly of the present invention;

fig. 20 is an enlarged schematic view of the portion a in fig. 1.

In the figure: 1 a support frame, 2 a placing table, 3 a clamping mechanism, 4 a ring guide rail, 5 a moving mounting frame, 51 a rack, 52 a traveling driving motor, 53 a gear, 54 a stabilizing slide, 6 a horizontal-vertical positioning assembly, 61 a first vertical positioning mechanism, 62 a first horizontal transverse positioning mechanism, 63 a first horizontal transverse positioning plate, 7 a binding assembly, 71 a first horizontal longitudinal positioning mechanism, 72 a first mounting frame, 73 a primary rolling flanging mechanism, 731 a primary rolling flanging forming die, 732 a primary rolling flanging forming feeding mechanism, 733 a first roller frame plate, 734 a starting press roller, 735 a diagonal press roller, 736 a first blank holder, 74 a secondary rolling flanging mechanism, 741 a secondary rolling flanging forming feeding mechanism, 743 a second roller frame plate, 744 a 745 a second vertical positioning mechanism, 746 a second blank holder, 8 a shaping assembly, 81 a second horizontal longitudinal positioning mechanism, 82 a second mounting frame, 83 a 83 shaping die 831, 832 a second horizontal positioning mechanism, 833 shaping punch, 834 a pre-shaping mechanism, 835 a pre-shaping mechanism, 836, 837 a shaping punch, 839 a trimming die, 9 a trimming die, 91 a trimming die, and a trimming die positioning support plate, and a trimming die and a supporting plate, and a positioning device.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.

Referring to fig. 1 to 17, a large-size thin-wall box-shaped part composite forming device comprises a supporting frame 1, a placing table 2 fixedly arranged on the top of the supporting frame 1, and a clamping mechanism 3 fixedly arranged above the top surface of the placing table 2. In this embodiment, the support frame 1 is formed by welding hollow square steel, and the bottom surface of the support frame is connected with a plurality of horizontal adjusting support legs, so that the surface levelness of the object placing table 2 can be adjusted through the horizontal adjusting support legs. The object placing table 2 is made of rectangular metal plates, is fixedly connected to the top end of the supporting frame 1 through welding or bolts and is used for placing and positioning a plate blank to be punched and formed, and the positioning and placing of the plate blank made of the rectangular metal plates with large size and thin wall thickness on the object placing table 2 can be realized through the vacuum chuck hoisting mechanism. The length and width dimensions of the placement table 2 are matched according to the length and width dimensions of the formed box-shaped part. The clamping mechanism 3 adopts a pneumatic compression mode to fix the plate blank on the top surface of the object placing table 2. Specifically, the clamping mechanism 3 comprises a portal frame formed by welding hollow square steel, a cylinder mounting plate fixedly connected to the side surface of the portal frame, a compression cylinder fixedly mounted at the bottom of the side surface of the cylinder mounting plate, and a compression plate fixedly connected to the output end of the bottom of the compression cylinder, and the compression cylinder drives the compression plate to rapidly descend or lift by adopting the compression plates distributed in a multi-point symmetrical manner, so that the rapid clamping or release of the plate blank on the storage plate 2 is realized.

Obviously, other similar mechanisms or devices with the above-described pressing function can also be used for the clamping mechanism 3. Or, the top surface of the object placing table 2 is internally provided with negative pressure air holes or negative pressure suction cups which are uniformly distributed, and a plate blank placed on the top surface of the object placing table 2 is adsorbed and fixed by generating negative pressure air flow in the negative pressure air holes or the negative pressure suction cups; or the electromagnetic blocks are uniformly distributed in the top surface of the object placing table 2, and the plate blanks placed on the top surface of the object placing table 2 are adsorbed and fixed through electromagnetic adsorption. In this embodiment, each moving positioning mechanism or feeding mechanism described later adopts an air cylinder or an air sliding table with a guiding structure driven by aerodynamic force, so as to realize rapid and accurate position switching. Obviously, besides the embodiment, the position switching and positioning functions can also be realized by adopting transmission structures such as a linear module driven by a servo motor, a hydraulic positioning system, a conveyor belt positioning drive and the like.

The outside of putting thing platform 2 is fixed and is provided with annular guide 4, and annular guide 4's top is provided with the movable mounting frame 5 that can follow annular guide 4 horizontal migration, and the side-mounting of movable mounting frame 5 has level-perpendicular to cut position subassembly 6, and the motion output of level-perpendicular cutting position subassembly 6 is fixedly connected with binding subassembly 7 and plastic subassembly 8 respectively, as shown in fig. 4 and 5. The movable mounting frame 5 moves along the annular guide rail 4 for synchronously moving the trimming assembly 7 and the shaping assembly 8 horizontally (x-axis direction as shown in fig. 1 and 2) or horizontally longitudinally (y-axis direction as shown in fig. 1 and 2); the horizontal-vertical cutting assembly 6 is used for the local switching of horizontal transverse positions or the switching of vertical (z-axis direction as shown in fig. 1 and 2) positions of the trimming assembly 7 and the shaping assembly 8 synchronously; the rolling assembly 7 completes rolling forming of the straight line section of the rolling forming part of the edge of the slab in the process that the movable mounting frame 5 moves along the straight line section of the annular guide rail 4, so that the slab is changed into a middle forming piece; the shaping assembly 8 performs the stamping and cutting of the corner portions of the middle shaping member when the movable mounting frame 5 is fixed to the arc-shaped turning portion of the annular guide rail 4, so as to form a box-shaped member with an integral structure and seamless connection, as shown in fig. 3.

In this embodiment, as shown in fig. 6 to 8, the annular guide rail 4 is formed by welding inner and outer layers of C-shaped steel materials arranged opposite to each other, the overall cross section is approximately square, the self weight of the annular guide rail 4 is reduced, the manufacturing cost is reduced, and the centers of the inner and outer sides of the annular guide rail 4 are provided with notches consistent with the length direction of the notches. A rack 51 is fixedly arranged on the outer side surface of the annular guide rail 4, a traveling driving motor 52 is fixedly arranged at the top of the movable mounting frame 5, and a gear 53 which is meshed with the rack 51 is fixedly arranged at the output end of the traveling driving motor 52. In order to make the structure more compact, in particular, the rack 51 is fixedly arranged on the outer side inner wall surface of the annular guide rail 4 through bolt connection, and the tooth widths of the rack 51 and the gear 53 are smaller than the width of the notch at the side; the diameter of the gear 53 is small, so that a shaft gear structure is adopted; the travel driving motor 52 adopts a stepping motor or a servo motor to more accurately control the rotation number of the gear 53, thereby realizing the accurate positioning of the movable mounting frame 5 on the annular guide rail 4, and in order to prevent the travel driving motor 52 from interfering with the upright post of the support frame 1 in the travel process, the travel driving motor 52 is fixedly arranged on the top surface of the movable mounting frame 5.

Preferably, a stable sliding block 54 which is embedded in the annular guide rail 4 in a sliding way is fixedly arranged on the inner wall of the movable mounting frame 5. The stabilizing slide block 54 is fixed on the inner wall of the movable mounting frame 5 through bolt connection, the surface of one end of the stabilizing slide block 54, which is positioned in the annular guide rail 4, is an arc-shaped surface, so that the side surface of the stabilizing slide block 54 is in line contact with the inner side wall of the annular guide rail 4, and the upper surface and the lower surface of the stabilizing slide block 54 are respectively in sliding fit with the notch surface of the side, so that the movable mounting frame 5 can be kept in a stable horizontal state in the advancing process on the annular guide rail 4, and the stable transition of the movable mounting frame 5 at the arc-shaped end of the annular guide rail 4 can be ensured. Further, a plurality of travel control switches (not shown in the figure) are arranged on the annular guide rail 4 for controlling the temporary setting of the travel driving motor 52, so as to realize the fixed-point stay of the operation point of the movable mounting frame 5 on the annular guide rail 4. The travel control switch can adopt any one of a mechanical touch switch, a photoelectric induction switch or a magneto-electric proximity switch.

As shown in fig. 9 and 10, the horizontal-vertical cutting assembly 6 includes a first vertical positioning mechanism 61 fixedly mounted on a side surface of the moving mounting frame 5 near the object placing table 2, and a first horizontal transverse positioning mechanism 62 fixedly mounted on a side surface of a movement output end of the first vertical positioning mechanism 61, and a first horizontal transverse positioning plate 63 is fixedly connected to a side surface of the movement output end of the first horizontal transverse positioning mechanism 62 near the object placing table 2. The first horizontal transverse positioning plate 63 can be positioned horizontally and/or vertically by the first vertical positioning mechanism 61 and the first horizontal transverse positioning mechanism 62.

As shown in fig. 11 and 12, the binding assembly 7 includes a first horizontal longitudinal positioning mechanism 71, a first mounting bracket 72 fixedly mounted on the top of the movement output end of the first horizontal longitudinal positioning mechanism 71, and the first horizontal longitudinal positioning mechanism 71 is fixedly mounted on the top surface side of the first horizontal transverse positioning plate 63. One side of the first mounting frame 72, which is close to the object placing table 2, is fixedly provided with a primary rolling flanging mechanism 73 and a secondary rolling flanging mechanism 74 respectively, the primary rolling flanging mechanism 73 rolls the edge part of the plate blank from a horizontal state to an inclined state, the secondary rolling flanging mechanism 74 continuously rolls the edge part of the plate blank from the inclined state to a vertical state, and in the secondary rolling process, both ends of the edge part of the plate blank are provided with non-rolling allowance.

Specifically, as shown in fig. 13 and 14, the primary roll-flanging mechanism 73 includes a primary roll-flanging die 731 fixedly mounted on the bottom of the first mounting frame 72, and a primary roll-flanging feeding mechanism 732 fixedly mounted on the top of the first mounting frame 72 and located directly above the primary roll-flanging die 731. The top surface of the primary roll-flanging die 731 is provided with an inclined slope surface (as shown in fig. 15) on the side away from the object placing table 2, and the direction of movement of the power output end of the primary roll-flanging feeding mechanism 732 is parallel to the slope surface. The output end of the primary roll flanging forming feeding mechanism 732 is fixedly connected with a first roll frame plate 733, the inside of the first roll frame plate 733 is respectively and rotatably connected with a start press roller 734 and an inclined press roller 735 positioned above the start press roller 734, the axis of the start press roller 734 is parallel to the movement direction of the movable mounting frame 5, and the axis of the inclined press roller 735 is parallel to the movement direction of the power output end of the primary roll flanging forming feeding mechanism 732. In the process that the primary roll flanging forming feeding mechanism 732 drives the first roll frame plate 733 to move downwards, the initial press roll 734 rolls down the edge forming area of the slab positioned below the initial press roll to enable the edge of the slab to be downwards turned to be attached to the slope of the primary roll flanging forming die 731; when the start press roller 734 is located at its slope lowest position in the primary press flanging die 731, the inclined press roller 735 is located on the top surface of the edge of the turned-down slab; the inclined pressure roller 735 continuously presses the edge of the slab forming area in the horizontal state to the inclined state during the forward travel of the moving mount 5.

Preferably, a first blank holder plate 736 is fixedly arranged on one side of the first roller frame plate 733, the bottom surface of the first blank holder plate 736 is parallel to the top surface of the object placing table 2, when the inclined press roller 735 is positioned on the top surface of the edge of the downward turned plate blank, the first blank holder plate 736 just presses the top surface of the plate blank to be matched with the top surface of the primary roll flanging forming die 731, the edge of the plate blank is pressed before rolling, and the edge of the plate blank in the horizontal state at the front end side is prevented from being bent or curled due to the downward turning and forming of the roll at the rear end side. Since the edges of the slab are turned down during one roll forming process, the first binder sheet 736 does not interfere adversely with the forming process, and the edges of the first binder sheet 736 are optimized to be able to entirely cover the slab edges.

As shown in fig. 16 and 17, the secondary roll-flanging mechanism 74 includes a secondary roll-flanging die 741 fixedly mounted to the bottom of the first mounting frame 72, and a secondary roll-flanging feed mechanism 742 fixedly mounted to the bottom of the first mounting frame 72 and located outside the secondary roll-flanging die 741. The side of the secondary roll-up forming die 741 away from the object placing table 2 is a vertical side, and since the secondary roll-up forming is to further turn down the edge of the slab based on the primary roll-up forming, in this embodiment, the secondary roll-up forming die 741 and the primary roll-up forming die 731 are integrally formed as shown in fig. 15.

The motion output end of the secondary roll-in flanging forming and feeding mechanism 742 is fixedly provided with a second roller frame plate 743 which can be close to or far away from the secondary roll-in flanging forming die 741, one end of the second roller frame plate 743 close to the secondary roll-in flanging forming die 741 is rotatably provided with at least one vertical press roller 744, and the axis of the vertical press roller 744 is vertically arranged. In the process that the movable mounting frame 5 continuously advances along the straight line section of the annular guide rail 4, the inclined press roller 735 continuously rolls the slab edge in the horizontal state into a downward inclined state; immediately thereafter, the secondary roll-flanging forming feed mechanism 742 pushes the second roll-up roller 743 horizontally and longitudinally adjacent to the secondary roll-flanging forming die 741, and the vertical press roller 744 contacts and pushes the edge of the slab to continue to turn down, so as to cooperate with the vertical side wall of the secondary roll-flanging forming die 741, and continuously turn down the edge of the slab in a downward inclined state and adhere to the vertical side wall of the secondary roll-flanging forming die 741; while the moving mount 5 continues to advance, the vertical press roller 744 continuously presses the slab edge in the later inclined state to the vertical state.

Preferably, the secondary roll flanging mechanism 74 further comprises a second vertical positioning mechanism 745 fixedly mounted on one side of the top of the first mounting frame 72, and the bottom output end of the second vertical positioning mechanism 745 is fixedly connected with a second blank holder 746 positioned right above the secondary roll flanging forming die 741, and the bottom surface of the second blank holder 746 is parallel to the top surface of the object placing table 2. When the secondary roll-flanging mechanism 74 performs the secondary roll-forming operation, the second vertical positioning mechanism 745 pushes the second blank holder 746 to move downward, and the second vertical positioning mechanism cooperates with the top surface of the secondary roll-flanging forming die 741 to compress the slab edge at the corresponding position before rolling, thereby preventing the inclined slab edge at the front end side from warping or curling due to the roll-down forming at the rear end side.

In the secondary roll forming process of the four straight edges of the slab, the portion of the single side edge located at the outer side of the two end parts of the object placing table 2 cannot be roll formed, so that after the secondary roll forming of the four straight edges of the slab is completed, the joint of the two straight edges of the adjacent slab is rectangular to form a pointed cone curved surface structure which is tilted outwards downwards, as shown in fig. 3. Thus requiring further shaping of the four corners.

As shown in fig. 18 and 19, the shaping assembly 8 comprises a second horizontal longitudinal positioning mechanism 81, and a second mounting frame 82 fixedly mounted on the top of the motion output end of the second horizontal longitudinal positioning mechanism 81, wherein a shaping cutting mechanism 83 is fixedly mounted on one side of the second mounting frame 82, which is close to the object placing table 2, and the shaping cutting mechanism 83 performs press forming on an non-rolled portion at the intersection of two adjacent edge positions of the slab. The second horizontal longitudinal positioning mechanism 81 is fixedly mounted on the other side of the top surface of the first horizontal lateral positioning plate 63.

The shaping and cutting mechanism 83 comprises a shaping female die 831 fixedly arranged on one side of the top of the second mounting frame 82 close to the object placing table 2 and positioned above the object placing table 2, and a second horizontal transverse positioning mechanism 832 fixedly arranged on the second mounting frame 82 and positioned below the shaping female die 831, wherein a shaping male die frame plate 833 is fixedly connected to the side face of the motion output end of the second horizontal transverse positioning mechanism 832, and a pre-shaping component, a finishing component and a trimming component are respectively fixedly arranged on one side of the shaping male die frame plate 833 close to the object placing table 2. The bottom surface of the shaping female die 831 is provided with an L-shaped shaping groove, and the inner side surfaces of two groove walls of the shaping groove are respectively overlapped with the projections of the outer walls of two adjacent side walls of the middle shaping piece in the vertical direction. The second horizontal positioning mechanism 832 can realize three-point positioning of the shaping punch carrier 833 in the horizontal transverse direction, thereby realizing position switching of the pre-shaping assembly, the finishing assembly and the trimming assembly in the horizontal transverse direction.

The pre-shaping assembly comprises a pre-shaping positioning mechanism 834, a pre-shaping male die 835 fixedly arranged at the top power output end of the pre-shaping positioning mechanism 834, the finishing assembly comprises a finishing positioning mechanism 836, a finishing male die 837 fixedly arranged at the top power output end of the finishing positioning mechanism 836, the trimming assembly comprises a trimming positioning mechanism 838, a trimming male die 839 fixedly arranged at the top power output end of the trimming positioning mechanism 838, and the pre-shaping male die 835, the finishing male die 837 and the trimming male die 839 can be respectively positioned under the shaping female die 831 and assembled with the shaping female die 831. The top surface rounded corner sizes of the pre-shaping punch 835, the finishing punch 837 and the trimming punch 839 are gradually reduced so as to adapt to the technological requirements of pre-shaping, finishing and trimming operations. The top of the second mounting frame 82 is fixedly provided with a third vertical positioning mechanism 8310, and the bottom power output end of the third vertical positioning mechanism 8310 is fixedly connected with a trimming pressing plate 8311 positioned below the shaping female die 831. The edge-cutting pressing plate 8311 is L-shaped, and the inner side surfaces thereof are respectively overlapped with the projections of the inner side surfaces of the two groove walls of the forming groove of the pre-shaping punch 835 in the vertical direction. When the shaping female die 831 moves vertically downwards, the pre-shaping male die 835 moves vertically upwards, the pre-shaping male die 835 cooperates with the shaping groove of the shaping female die 831 to enable the pointed cone curved surface structure at the corner position of the middle shaping piece to be extruded and deformed in the shaping groove, the redundant materials at the corner position are extruded downwards below the shaping groove, the third vertical positioning mechanism 8310 drives the trimming pressing plate 8311 to move vertically upwards, and cooperates with the bottom surface of the shaping female die 831 to extrude and turn over the extruded redundant materials outwards to a horizontal state; then, the finishing punch 837 replaces the pre-shaping punch 835 and is matched with the shaping die 831 to finish further shaping operation, so that the outer diameter of the corner reaches the specification requirement of a finished product; and finally, the trimming male die 839 replaces the finishing male die 837 and is matched with the shaping female die 831, the redundant material extruded to be in a horizontal state is cut off, and the shaping treatment of the corner is completed, so that the corner is in an integrally formed seamless continuous structure.

Preferably, as shown in fig. 20, the outer side of the object placing table 2 is fixedly provided with an annular supporting plate 9, and the bottom surfaces of the first mounting frame 72, the second mounting frame 82 and the shaping punch frame 833 are movably located on the top surface of the supporting plate 9, so that each mechanism and assembly can keep stable in the following moving process of the moving mounting frame 5. Further, the edge corner of the object placing table 2 is fixedly connected with an auxiliary positioning block 91 located above the supporting plate 9, when the movable mounting frame 5 moves to the arc section position of the annular guide rail 4, the edge part of the shaping punch frame 833 is located below the auxiliary positioning block 91, and the vertical movement of the shaping punch frame 833 can be limited by the cooperation of the auxiliary positioning block 91 and the supporting plate 9, so that the problem that the mechanism is inclined due to large stamping force in the shaping operation process of the shaping cutting mechanism 83 is solved.

The composite forming method of the large-size thin-wall box-shaped part is applied to the composite forming device of the large-size thin-wall box-shaped part, and comprises the following steps of:

s1: the slab is accurately placed on the table top of the object placing table 2, and is fixedly pressed on the object placing table 2 through the clamping mechanism 3, so that the flanging parts of the peripheral edges of the slab are positioned outside the edge of the table top of the object placing table 2.

Because the heights of the four side walls of the box-shaped part are the same, the distances from the side edges of the plate blank to the corresponding side edges of the object placing table 2 are required to be equal, and therefore, reference position points can be arranged on the side walls of the object placing table 2, so that the plate blank can be accurately placed as soon as possible, the situation that the heights of the four side walls of the finally formed box-shaped part are different due to large plate blank position placement errors is avoided, and the one-time success rate of products is improved. After the clamping mechanism 3 clamps and fixes the slab, the slab position detection can be performed again according to the requirement, so that the fixed position of the slab on the object placing table 2 is further ensured to be accurate.

S2: the movable mounting frame 5 moves to a preset starting point position of a flanging forming part positioned at one side edge of the slab, the first horizontal longitudinal positioning mechanism 71 drives the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 to be close to the slab on the object placing table 2, and the horizontal-vertical cutting assembly 6 drives the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 to move upwards to a rolling operation position;

before the rolling operation, the primary rolling flanging die 731 is located below the slab, and the start press roller 734 and the inclined press roller 735 are both located above the slab, so that after the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 are driven by the first horizontal longitudinal positioning mechanism 71 to approach the slab on the object placing table 2, the slab is located between the primary rolling flanging die 731 and the start press roller 734; the first vertical positioning mechanism 61 drives the first horizontal transverse positioning plate 63 to rise so that the primary roll-flanging forming die 731 rises until the top surface of the primary roll-flanging forming die 731 is flush with the top surface of the object placing table 2; at this time, the primary roll-flanging mechanism 73 is located at the roll-in operation position.

S3: the primary rolling flanging mechanism 73 works to finish primary partial rolling flanging at the preset starting point position of the flanging forming part of the side edge of the slab;

the specific process is as follows: the primary roll flanging forming feeding mechanism 732 drives the first roller frame plate 733 to move downwards, and the initial press roller 734 rolls down the plate blank edge forming area positioned below the first roller frame plate 733, so that the plate blank edge is downwards turned to be attached to the slope of the primary roll flanging forming die 731; when the start press roller 734 is positioned at its slope lowest position in the primary press flanging die 731, the inclined press roller 735 is positioned on the top surface of the edge of the turned-down slab, and the first edge-pressing plate 736 is pressed against the top surface of the edge of the slab.

S4: the movable mounting frame 5 moves horizontally and linearly, and continuously advances from a preset starting point position of a flanging forming part of the side edge of the slab to a preset ending point position of the flanging forming part of the side edge of the slab, and the primary rolling flanging mechanism 73 performs continuous rolling flanging forming on the flanging forming part of the side edge of the slab in the synchronous horizontal and linear movement process;

in this process, the first edge pressing plate 736 and the primary roll flanging forming die 731 are synchronously moved horizontally, and the to-be-rolled region of the slab is clamped, so that warping caused by deformation of the front roll forming section is prevented, and the to-be-rolled region is continuously bent and deformed in a downward transition manner under the action of deformation and pulling of the front forming end; the inclined pressure roller 735 continuously presses the edge of the slab forming area in the horizontal state to the inclined state following the surface of the slab subjected to the downward transition bending deformation during the synchronous traveling.

S5: after the primary rolling flanging mechanism 73 leaves the preset starting point position of the flanging forming part of the side edge of the slab to a preset distance, the secondary rolling flanging mechanism 74 works, the secondary rolling flanging forming is carried out on the flanging forming part of the side edge of the slab in an inclined state after the primary rolling forming, and in the continuous rolling process of the primary rolling flanging mechanism 73, the secondary rolling flanging mechanism 74 tightly carries out continuous rolling along with the steps;

because the secondary roll-up forming die 741 and the primary roll-up forming die 731 are integrally formed, when the primary roll-up forming die 731 is close to the placement table 2 and rises to a level where its top surface is flush with the top surface of the placement table 2, the secondary roll-up forming die 741 also makes its top surface flush with the top surface of the placement table 2 by the same movement, and the bending position of the secondary roll-up forming die 741 coincides with the bending position of the primary roll-up forming die 731. After the primary rolling flanging mechanism 73 completes the partial rolling forming of the initial point position, the primary rolling flanging mechanism 73 continues to move to the key position along with the movable mounting frame 5, and the edge of the slab is rolled from a horizontal state to an inclined state; when the distance from the initial point position of the primary rolling flanging mechanism 73 is larger than the width of the secondary rolling flanging forming die 741, the secondary rolling flanging forming die 741 is positioned right below the edge of the slab in an inclined state, at this time, the secondary rolling flanging forming feeding mechanism 742 pushes the second roller frame plate 743 to move horizontally to the side direction of the secondary rolling flanging forming die 741, and the vertical press roller 744 contacts the edge of the slab in an inclined state and then pushes the edge of the slab to continuously overturn downwards to be attached to the vertical side surface of the secondary rolling flanging forming die 741 in the process of gradually approaching the secondary rolling flanging forming die 741, so that the secondary rolling forming process is completed; at this time, the vertical compression roller 744 is abutted against the outer surface of the slab edge in the vertical state, and meanwhile, the second vertical positioning mechanism 745 drives the second blank holder 746 to move downwards and press the top surface edge of the slab, and the vertical compression roller 744 continuously rolls the inclined slab edge in the process of continuously advancing along with the moving mounting frame 5. Because the secondary rolling flanging mechanism 74 and the primary rolling flanging mechanism 73 are in a front-back position relationship in the horizontal transverse direction, when the primary rolling flanging mechanism 73 reaches the end point position of the flanging forming part of the side edge of the slab, the secondary rolling flanging mechanism 74 is a small distance away from the end point position, at this time, the first horizontal transverse positioning mechanism 62 works, and the first horizontal transverse positioning plate 63 is driven to move relatively to the mounting frame 5 and horizontally move forward by one end distance, so that the secondary rolling flanging mechanism 74 can finish secondary rolling flanging forming on the slab edge within the small distance.

S6: after the movable mounting frame 5 moves to the preset end point position of the flanging forming part of the side edge of the slab, stopping moving, wherein the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 work reversely and reset, the horizontal-vertical cutting assembly 6 works reversely, the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 are driven to move downwards and reset, the first horizontal longitudinal positioning mechanism 71 works reversely, and the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 are driven to be away from the object placing table 2 and reset;

the specific resetting process is as follows: the primary roll flanging forming feeding mechanism 732 works reversely, drives the first roller frame plate 733 and the initial press roll 734 and the inclined press roll 735 on the first roller frame plate to synchronously move upwards and reset; the secondary rolling flanging forming feeding mechanism 742 works reversely to drive the second roller frame plate 743 and the vertical compression roller 744 thereon to be far away from the object placing table 2 and reset, and the second vertical positioning mechanism 745 works reversely to drive the second blank holder 746 to move upwards and reset; 61 the first vertical positioning mechanism moves reversely to drive the first horizontal transverse positioning plate 63 and the first mounting frame 72 thereon, and the primary roll-flanging forming die 731 and the secondary roll-flanging forming die 741 on the first mounting frame 72 move downwards to reset; the first horizontal longitudinal positioning mechanism 71 works reversely, and drives the first mounting frame 72 and the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 on the first mounting frame to complete integral reset in the horizontal longitudinal direction; finally, the first horizontal transverse positioning mechanism 62 works reversely to drive the first mounting frame 72 and the primary rolling flanging mechanism 73 and the secondary rolling flanging mechanism 74 on the first mounting frame to complete integral horizontal transverse resetting.

S7: moving the movable mounting frame 5 to the edge of the other side of the slab along the annular guide rail 4, and repeatedly executing the steps S2 to S6 until the rolling flanging forming of the edges of the four sides of the slab is completed, so as to obtain a middle forming piece;

s8: the movable mounting frame 5 moves to one corner position of the middle forming piece along the annular guide rail 4, and the second horizontal longitudinal positioning mechanism 81 drives the shaping and cutting mechanism 83 to be close to the corner, so that the corner is in the working position of the shaping and cutting mechanism 83;

at this time, the outer side edge of the shaping punch holder 833 is located between the bearing plate 9 and the auxiliary positioning block 91, the shaping die 831 is located right above the corner of the middle forming piece, the trimming press plate 8311 is located right below the corner, and the inner side walls of the shaping die 831 and the trimming press plate 8311 are both coincident with the projections of the outer walls of the vertical side walls of the two middle forming pieces adjacent to the corner in the vertical direction. In the initial state, the pre-shaping punch 835 is located directly below the shaping die 831, so that at this time the pre-shaping punch 835 is located directly below the corner and below the trimming press plate 8311.

S9: the shaping and cutting mechanism works, and the shaping part at the corner position is subjected to pre-shaping, fine shaping and cutting shaping sequentially through the switching of the working positions of the dies and the press fit;

The specific shaping and cutting processes are as follows: the first vertical positioning mechanism 61 works, the shaping assembly 8 is driven to move downwards as a whole, the shaping female die 831 is buckled on the outer side of the top of the corner of the middle shaping piece from top to bottom, meanwhile, the pre-shaping positioning mechanism 834 works, the pre-shaping male die 835 is driven to move upwards vertically, the pre-shaping male die 835 is matched with the shaping female die 831, the pointed cone curved surface structure at the corner position of the middle shaping piece is extruded and deformed in the shaping groove, redundant materials at the corner are extruded downwards to the lower side of the shaping groove, the third vertical positioning mechanism 8310 works, the trimming pressing plate 8311 is driven to move upwards vertically and is matched with the bottom surface of the shaping female die 831, and the extruded redundant materials are extruded and turned outwards to be in a horizontal state; then, the pre-shaping positioning mechanism 834 works reversely to drive the pre-shaping male die 835 to move vertically downwards for resetting; the second horizontal positioning mechanism 832 works to drive the shaping punch holder 833 to horizontally and transversely move a certain distance, so that the finishing punch 837 replaces the pre-shaping punch 835 to be positioned right below the shaping female die 831; the fine shaping positioning mechanism 836 works to drive the fine shaping male die 837 to vertically move upwards and match with the shaping female die 831 to finish further shaping operation, so that the outer diameter of the corner reaches the specification requirement of a finished product; the fine shaping positioning mechanism 836 works reversely to drive the fine shaping punch 837 to vertically move up and down and reset; finally, the second horizontal positioning mechanism 832 continues to work, and drives the shaping punch holder 833 to horizontally and transversely move a certain distance again, so that the trimming punch 839 replaces the fine shaping punch 837 and is positioned under the shaping female die 831; the trimming positioning mechanism 838 works to drive the trimming male die 839 to vertically move upwards and match with the shaping female die 831, and cut off the redundant material extruded to be in a horizontal state, thereby completing the shaping treatment of the corner, and enabling the corner to be in an integrally formed seamless continuous structure.

S10: after the corner position is shaped, the shaping and cutting mechanism resets itself, and the second horizontal longitudinal positioning mechanism drives the shaping and cutting mechanism to be away from the corner and reset;

the specific resetting process is as follows: the trimming positioning mechanism 838 works reversely, drives the trimming male die 839 to move vertically downwards and reset, the second horizontal positioning mechanism 832 works reversely, drives the shaping male die frame plate 833 to move horizontally and reset, the first vertical positioning mechanism 61 works reversely, enables the second mounting frame 82 and the shaping female die 831 thereon to move vertically upwards, completes the integral vertical reset of the shaping cutting mechanism 83, and finally the second horizontal longitudinal positioning mechanism 81 works reversely, and drives the shaping cutting mechanism 83 to reset horizontally.

S11: the movable mounting frame moves to the other corner position of the middle forming piece along the annular guide rail; and repeating the steps S8 to S10 until all four corners of the middle forming piece are shaped, and obtaining the box-shaped piece.

In the forming process, the stamping, shaping and cutting operation of the four corners of the plate blank can be finished firstly, and then the secondary rolling and flanging operation of each linear edge can be finished.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims (10)

1. The utility model provides a compound shaper of jumbo size thin-wall box-like spare, includes support frame (1), fixed thing platform (2) that put that set up in support frame (1) top, fixed clamping mechanism (3) that set up in putting thing platform (2) top surface top, its characterized in that: the movable type automatic trimming device is characterized in that an annular guide rail (4) is fixedly arranged on the outer side of the object placing table (2), a movable mounting frame (5) capable of horizontally moving along the annular guide rail (4) is arranged at the top of the annular guide rail (4), a horizontal-vertical trimming component (6) is arranged on the side face of the movable mounting frame (5), and a trimming component (7) and a shaping component (8) are fixedly connected to the movement output end of the horizontal-vertical trimming component (6) respectively;

the rolling and flanging assembly (7) comprises a first horizontal longitudinal positioning mechanism (71) and a first mounting frame (72) fixedly mounted at the top of a motion output end of the first horizontal longitudinal positioning mechanism (71), wherein a primary rolling and flanging mechanism (73) and a secondary rolling and flanging mechanism (74) are fixedly mounted on one side, close to the object placing table (2), of the first mounting frame (72), the primary rolling and flanging mechanism (73) rolls the edge part of a plate blank from a horizontal state to an inclined state, the secondary rolling and flanging mechanism (74) continuously rolls the edge part of the plate blank from the inclined state to a vertical state, and non-rolling allowance is reserved at two end parts of the edge part of the plate blank in the two rolling processes;

The shaping assembly (8) comprises a second horizontal longitudinal positioning mechanism (81) and a second mounting frame (82) fixedly mounted at the top of the motion output end of the second horizontal longitudinal positioning mechanism (81), one side, close to the object placing table (2), of the second mounting frame (82) is fixedly provided with a shaping cutting mechanism (83), and the shaping cutting mechanism (83) performs stamping forming on an non-rolled part at the intersection of two adjacent edge parts of the slab.

2. A large-size thin-wall box-type member composite forming apparatus according to claim 1, wherein: the novel sliding type movable guide rail is characterized in that a rack (51) is fixedly arranged on the outer side face of the annular guide rail (4), a traveling driving motor (52) is fixedly arranged at the top of the movable mounting frame (5), a gear (53) meshed with the rack (51) is fixedly arranged at the output end of the traveling driving motor (52), and a stable sliding block (54) which is embedded in the annular guide rail (4) in a sliding mode is fixedly arranged on the inner wall of the movable mounting frame (5).

3. A large-size thin-wall box-type member composite forming apparatus according to claim 1, wherein: the horizontal-vertical cutting assembly (6) comprises a first vertical positioning mechanism (61) fixedly installed on the side surface, close to the object placing table (2), of the movable mounting frame (5), a first horizontal transverse positioning mechanism (62) fixedly installed on the side surface of the motion output end of the first vertical positioning mechanism (61), a first horizontal transverse positioning plate (63) is fixedly connected to the side surface, close to the object placing table (2), of the motion output end of the first horizontal transverse positioning mechanism (62), and a first horizontal longitudinal positioning mechanism (71) and a second horizontal longitudinal positioning mechanism (81) are fixedly installed on two sides of the top surface of the first horizontal transverse positioning plate (63) respectively.

4. A large-size thin-wall box-type member composite forming apparatus according to claim 1, wherein: the primary rolling flanging mechanism (73) comprises a primary rolling flanging forming die (731) fixedly arranged at the bottom of the first mounting frame (72), and a primary rolling flanging forming feeding mechanism (732) fixedly arranged at the top of the first mounting frame (72) and positioned right above the primary rolling flanging forming die (731), wherein one side, far away from the object placing table (2), of the top surface of the primary rolling flanging forming die (731) is an inclined slope, and the motion direction of a power output end of the primary rolling flanging forming feeding mechanism (732) is parallel to the slope;

the utility model discloses a roll-in flanging forming feed mechanism, including primary roll-in flanging forming feed mechanism, output fixedly connected with first roller frame board (733), the inside of first roller frame board (733) is rotated respectively and is connected with initial compression roller (734) and is located oblique compression roller (735) of initial compression roller (734) top, the axis of initial compression roller (734) is parallel with the direction of motion of mobile mounting bracket (5), the axis of oblique compression roller (735) is parallel with the power take-off end direction of motion of primary roll-in flanging forming feed mechanism (732).

5. The large-size thin-wall box-shaped member composite forming apparatus according to claim 4, wherein: one side of the first roller frame plate (733) is fixedly provided with a first blank holder plate (736), and the bottom surface of the first blank holder plate (736) is parallel to the top surface of the object placing table (2).

6. A large-size thin-wall box-type member composite forming apparatus according to claim 1, wherein: the secondary rolling flanging mechanism (74) comprises a secondary rolling flanging forming die (741) fixedly arranged at the bottom of the first mounting frame (72), and a secondary rolling flanging forming feeding mechanism (742) fixedly arranged at the bottom of the first mounting frame (72) and positioned at the outer side of the secondary rolling flanging forming die (741), wherein a second roller frame plate (743) which can be close to or far away from the secondary rolling flanging forming die (741) is fixedly arranged at the motion output end of the secondary rolling flanging forming feeding mechanism (742), and at least one vertical pressing roller (744) is rotatably arranged at one end of the second roller frame plate (743) close to the secondary rolling flanging forming die (741);

the side surface of the secondary rolling flanging forming die (741) far away from one side of the object placing table (2) is a vertical surface, and the axis of the vertical pressing roller (744) is vertically arranged.

7. The large-size thin-wall box-shaped member composite forming apparatus according to claim 6, wherein: the secondary roll-in flanging mechanism (74) further comprises a second vertical positioning mechanism (745) fixedly mounted on one side of the top of the first mounting frame (72), the bottom output end of the second vertical positioning mechanism (745) is fixedly connected with a second blank holder (746) which is positioned right above the secondary roll-in flanging forming die (741), and the bottom surface of the second blank holder (746) is parallel to the top surface of the object placing table (2).

8. A large-size thin-wall box-type member composite forming apparatus according to claim 1, wherein: the shaping and cutting mechanism (83) comprises a shaping female die (831) fixedly arranged on one side of the top of the second mounting frame (82) close to the object placing table (2) and positioned above the object placing table (2), and a second horizontal transverse positioning mechanism (832) fixedly arranged on the second mounting frame (82) and positioned below the shaping female die (831), wherein a shaping male die frame plate (833) is fixedly connected to the side surface of the motion output end of the second horizontal transverse positioning mechanism (832), and a pre-shaping assembly, a finishing assembly and a trimming assembly are respectively fixedly arranged on one side of the shaping male die frame plate (833) close to the object placing table (2);

The shaping assembly comprises a shaping positioning mechanism (834), a shaping male die (835) fixedly mounted at the top power output end of the shaping positioning mechanism (834), the shaping assembly comprises a fine shaping positioning mechanism (836), a finishing male die (837) fixedly mounted at the top power output end of the finishing positioning mechanism (836), the trimming assembly comprises a trimming positioning mechanism (838), a trimming male die (839) fixedly mounted at the top power output end of the trimming positioning mechanism (838), and the shaping male die (835), the finishing male die (837) and the trimming male die (839) can be respectively located under the shaping female die (831) and assembled with the shaping female die (831).

9. A large-size thin-wall box-type member composite forming apparatus according to claim 8, wherein: the top of second mounting bracket (82) is fixed and is provided with third vertical positioning mechanism (8310), the bottom power take off end fixedly connected with of third vertical positioning mechanism (8310) is located cut-off limit clamp plate (8311) of plastic die (831) below.

10. A large-size thin-wall box-shaped member composite forming method applied to the large-size thin-wall box-shaped member composite forming device as claimed in any one of claims 1 to 9, characterized in that the composite forming method comprises the steps of:

S1: placing the slab on the table top of the object placing table accurately, and fixing and pressing the slab on the object placing table through a clamping mechanism, so that the flanging positions of the peripheral edges of the slab are positioned outside the edge of the table top of the object placing table;

s2: the movable mounting frame moves to a preset starting point position of a flanging forming part positioned at a certain side edge of the slab, the first horizontal longitudinal positioning mechanism drives the primary rolling flanging mechanism and the secondary rolling flanging mechanism to be close to the slab on the object placing table, and the horizontal-vertical position cutting assembly drives the primary rolling flanging mechanism and the secondary rolling flanging mechanism to move upwards to a rolling operation position;

s3: the primary rolling flanging mechanism works to finish primary partial rolling flanging at the preset starting point position of the flanging forming part of the side edge of the slab;

s4: the movable mounting frame moves horizontally and linearly, and continuously advances from a preset starting point position of a flanging forming part of the side edge of the plate blank to a preset ending point position of the flanging forming part of the side edge of the plate blank, and the one-time rolling flanging mechanism carries out continuous rolling flanging forming on the flanging forming part of the side edge of the plate blank in the synchronous horizontal linear movement process;

s5: after the primary rolling flanging mechanism leaves the preset starting point position of the flanging forming part of the side edge of the slab to a preset distance, the secondary rolling flanging mechanism works, the flanging forming part of the side edge of the slab in an inclined state after the primary rolling forming is subjected to secondary rolling flanging forming, and in the continuous rolling process of the primary rolling flanging mechanism, the secondary rolling flanging mechanism is tightly continuous rolling along with the step;

S6: after the movable mounting frame moves to the preset end point position of the flanging forming part of the side edge of the slab, stopping moving, wherein the primary rolling flanging mechanism and the secondary rolling flanging mechanism work reversely and reset, the horizontal-vertical position cutting assembly work reversely, the primary rolling flanging mechanism and the secondary rolling flanging mechanism are driven to move downwards and reset, and the first horizontal longitudinal positioning mechanism works reversely and drives the primary rolling flanging mechanism and the secondary rolling flanging mechanism to be away from the object placing table and reset;

s7: moving the movable mounting frame to the edge of the other side of the slab along the annular guide rail, and repeatedly executing the steps S2 to S6 until the rolling flanging forming of the edges of the four sides of the slab is completed, so as to obtain a middle forming piece;

s8: the movable mounting frame moves to one corner position of the middle forming piece along the annular guide rail, and the second horizontal longitudinal positioning mechanism drives the shaping and cutting mechanism to be close to the corner, so that the corner is positioned at the working position of the shaping and cutting mechanism;

s9: the shaping and cutting mechanism works, and the shaping part at the corner position is subjected to pre-shaping, fine shaping and cutting shaping sequentially through the switching of the working positions of the dies and the press fit;

s10: after the corner position is shaped, the shaping and cutting mechanism resets itself, and the second horizontal longitudinal positioning mechanism drives the shaping and cutting mechanism to be away from the corner and reset;

S11: the movable mounting frame moves to the other corner position of the middle forming piece along the annular guide rail; and repeating the steps S8 to S10 until all four corners of the middle forming piece are shaped, and obtaining the box-shaped piece.