CN117619950A - Steel structure rapid forming equipment and forming process - Google Patents

Abstract

The invention provides a steel structure rapid forming device and a forming process; wherein the device comprises a bending mechanism, a clamping mechanism and a supporting mechanism; the bending mechanism is used for forming the plate; the clamping mechanism is used for clamping the side edges of the plates; the supporting mechanism is used for bending and jacking the plate. The molding process may be applied to the apparatus described above. According to the bending machine, the plate is bent and formed through the bending mechanism, the clamping mechanism is arranged on the machine body, the plate can be fixed from two sides of the plate through the clamping mechanism, the clamping mechanism can always clamp the plate in the bending process of the plate, and the plate can always keep a clamped state in the bending process through the horizontal movement of the side edges of the plate along with the pressure applied to the middle area of the plate due to bending and forming, so that the warping of the two sides of the plate in the bending process is prevented, and the bending quality of the plate is improved.

Description

Steel structure rapid forming equipment and forming process

Technical Field

The invention relates to the technical field of steel structure forming equipment, in particular to steel structure rapid forming equipment and a steel structure rapid forming process.

Background

The steel structure is a structure formed by steel materials, is one of main building structure types, mainly comprises steel beams, steel columns, steel trusses and other components made of section steel, plates and the like, and adopts the rust removal and rust prevention processes of silanization, pure manganese phosphating, washing and drying, galvanization and the like, and all the components or parts are connected by welding seams, bolts or rivets;

at present steel construction processing equipment is most when using through bending mould bending shaping, and panel can be fixed a position through anchor clamps earlier in prior art, then order about bending mould to push down through elevating gear, but the both sides of panel can be because of the mould pushes down and inwards shrink when the location, and current equipment is not pressing from both sides the panel clamp, just is fixing a position it through anchor clamps between bending shaping, and panel can take place the perk because of the extrusion in the corner between equipment and the die cavity to lead to panel to produce the extrusion force in the corner between equipment and the die cavity, influence panel bending quality.

Disclosure of Invention

The invention aims to provide rapid forming equipment and forming technology for a steel structure, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: a steel structure rapid prototyping device comprises a machine body, and a bending mechanism, a clamping mechanism and a supporting mechanism which are arranged on the machine body; a workbench for placing plates is arranged on the machine body, and a cavity is formed in the middle of the workbench; the bending mechanism is positioned above the workbench and is suitable for being matched with the cavity to bend and shape the plate; the clamping mechanisms are positioned at two sides of the workbench and used for clamping two sides of the plate; the supporting mechanisms are positioned on two sides of the workbench and close to the cavity; in the process of bending and forming the plate by the bending mechanism, the clamping mechanism is suitable for keeping clamping the plate under the driving of the bending mechanism and moving towards the direction close to the cavity under the traction of deformation of the plate; simultaneously, the supporting mechanism is suitable for bending and jacking the plate close to the plate section of the cavity under the drive of the bending mechanism until the plate is separated from the workbench.

Preferably, a supporting frame is fixed above the workbench by the machine body; the bending mechanism comprises at least one lifting device and a forming die; the lifting device is fixedly arranged on the support frame and is connected with the forming die through an output end, and then the forming die is driven by the lifting device to be matched with the cavity to bend and form the plate; and is adapted to cooperate with the clamping mechanism and the support mechanism during vertical movement of the forming die.

Preferably, the clamping mechanism comprises a bottom plate, a clamping plate and a pressing sleeve; the bottom plate is elastically connected with the machine body in a sliding manner, and an installation cavity is formed in the bottom plate; the clamping plate is positioned in the mounting cavity and is vertically elastically connected with the top of the mounting cavity in a sliding manner through a connecting rod; the pressing sleeve is elastically and slidably connected with a rod section of the connecting rod extending out of the upper part of the bottom plate; when the plate is fed, the side edge of the plate is positioned at the bottom of the mounting cavity; when the forming die moves downwards to contact the plate, the forming die is suitable for extruding the pressing sleeve to drive the clamping plate to clamp the side edge of the plate; when the forming die bends the plate, the pressing sleeve elastically slides to keep the clamping plate clamped on the side edge of the plate; simultaneously, the clamping mechanism moves along the machine body to the direction close to the cavity through the bottom plate under the traction of the deformation of the plate.

Preferably, a roller is installed at the top of the pressing sleeve, and the pressing sleeve is suitable for being matched with the forming die through the roller; and when the clamping mechanism moves along the machine body in a direction approaching to the cavity, the pressing sleeve is suitable for rolling along the forming die through the roller.

Preferably, the bottom plate performs plate feeding at a first position of the machine body; the distance from the first position to the cavity is adjustable.

Preferably, the supporting mechanism comprises a triggering component and a jacking component; the jacking component is rotatably arranged at the side part of the workbench, which is close to the cavity, and comprises a convex section higher than the workbench and a flush section which is flush with or lower than the workbench; the trigger component is arranged on the workbench and is suitable for being matched with the forming die; when the forming die bends the plate, the trigger assembly is suitable for driving the jacking component to rotate under the extrusion of the forming die, and then the jacking component jacks up and bends the plate section to be bent of the plate through the protruding section; when the forming die finishes bending the plate, the jacking component rotates until the flush section corresponds to the plate, so that the forming die flattens the plate section, which is not bent, of the plate.

Preferably, the workbench is provided with accommodating grooves on two sides of the cavity; the jacking component is a cam roller, and the cam roller is rotatably arranged in the accommodating groove through a rotating shaft; the surface of the cam roller in the circumferential direction comprises a long stroke section and a short stroke section which are arc-shaped; the distance from the long travel section to the center of the rotating shaft is larger than the vertical distance from the workbench to the center of the rotating shaft; the distance from the short stroke section to the center of the rotating shaft is smaller than or equal to the vertical distance from the workbench to the center of the rotating shaft; the long stroke section forms the convex section and the short stroke section forms the flush section.

Preferably, the trigger assembly comprises a toothed plate and a gear set; the rack plate is vertically and elastically slidably arranged on the machine body, the input end of the gear set is suitable for being meshed with the rack section on the rack plate, and the output end of the gear set is suitable for being in transmission connection with the rotating shaft; when the forming die bends the plate, the toothed plate vertically moves under the extrusion of the forming die, and then the rotating shaft is driven to drive the cam roller to rotate through the engagement of the rack section and the gear set.

Preferably, the forming die comprises an extrusion part and a core which are fixedly connected from top to bottom; the mold core is of a T-shaped structure, the mold core is suitable for being matched with the cavity through the middle part, and two sides of the mold core extend to be suitable for extrusion covering of the mounting position of the supporting mechanism; the pressing portion is adapted to cooperate with the clamping mechanism and the supporting mechanism.

A steel structure rapid forming process comprises the following steps:

s1, positioning a plate, namely placing the plate on a workbench, starting a bending mechanism, driving a clamping mechanism to clamp and position two sides of the plate when the bending mechanism acts, and realizing plate positioning through the clamping mechanism until the plate bending process is finished;

s2, pre-bending, namely pre-bending the positioned plate by matching with the supporting mechanism when the bending mechanism gradually acts;

s3, performing formal bending forming, namely performing formal bending on the plate along with the continuous action of the bending mechanism, wherein a section of gap is reserved between the plate and the workbench while the plate is pre-bent by the supporting mechanism in advance, so that the pre-bent plate section is not contacted with the top end of the side part of the cavity in the bending process.

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

1. according to the bending machine, the plate is bent and formed through the bending mechanism, the clamping mechanism is arranged on the machine body, the plate can be fixed from two sides of the plate through the clamping mechanism, the clamping mechanism can always clamp the plate in the bending process of the plate, and the plate can always keep a clamped state in the bending process through the horizontal movement of the side edges of the plate along with the pressure applied to the middle area of the plate due to bending and forming, so that the warping of the two sides of the plate in the bending process is prevented, and the bending quality of the plate is improved.

2. According to the invention, the support mechanism is further arranged on the machine body, and the plate can be pre-bent when the bending mechanism acts, so that the bottom of the plate can be bent under the condition that the bottom of the plate is not contacted with the top of the machine body, the plate can not be contacted with the corner between the machine body and the cavity before pre-bending, the plate is prevented from generating extrusion force at the corner between the machine body and the cavity, and the bending quality is further improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic structural view of a clamping mechanism in the present invention.

Fig. 3 is a schematic structural view of a supporting mechanism in the present invention.

Fig. 4 is a schematic view of the installation structure of the toothed plate and the connecting plate in the present invention.

Fig. 5 is a schematic view of the feeding state of the present invention.

Fig. 6 is an enlarged partial schematic view of fig. 5 a in accordance with the present invention.

Fig. 7 is a schematic view of a clamping mechanism during feeding according to the present invention.

Fig. 8 is a schematic view showing a state in which the forming die is just in contact with the plate material when bending is performed.

Fig. 9 is a schematic view showing a state of the clamping mechanism when the forming die just contacts the plate material in the present invention.

Fig. 10 is a schematic view showing a state when bending a plate according to the present invention.

Fig. 11 is an enlarged partial schematic view of the present invention at B in fig. 10.

Fig. 12 is a schematic view showing a state of the clamping mechanism when bending the plate according to the present invention.

Fig. 13 is a process flow diagram of the present invention.

In the figure: the machine body 1, the support frame 11, the accommodating groove 12, the cavity 13, the bending mechanism 2, the lifting device 21, the forming die 22, the core 221, the base 222, the base plate 223, the clamping mechanism 3, the bottom plate 31, the mounting cavity 310, the top plate 32, the clamping plate 33, the first return spring 34, the connecting rod 35, the pressing sleeve 36, the first spring 37, the second spring 38, the roller 39, the supporting mechanism 4, the triggering component 41, the toothed plate 411, the first gear 412, the second gear 413, the traction shaft 414, the connecting plate 415, the second return spring 416, the cam roller 42, the long-stroke section 421, the short-stroke section 422, the rotating shaft 43 and the plate 500.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

One aspect of the present application provides a steel structure rapid prototyping apparatus, as shown in fig. 1 to 12, wherein one preferred embodiment includes a machine body 1, and a bending mechanism 2, a clamping mechanism 3, and a supporting mechanism 4 mounted to the machine body 1. A workbench for placing the plate 500 is arranged on the machine body 1, and a cavity 13 is arranged in the middle of the workbench; the bending mechanism 2 is located above the workbench, and the bending mechanism 2 can be matched with the cavity 13 through downward movement to realize bending and forming of the plate 500. The clamping mechanisms 3 are located at two sides of the workbench and are used for clamping two sides of the plate 500, so that the plate 500 cannot tilt in the bending and forming process. The supporting mechanism 4 is located the both sides of workstation and is close to die cavity 13, and supporting mechanism 4 can be with the board section that will buckle of panel 500 crooked jack-up to when realizing buckling in advance to the board section, can also avoid this board section to contact with the lateral part upper corner of die cavity 13, and then can effectually improve the shaping quality of buckling of panel 500.

It should be appreciated that since the sheet 500 may form a certain warpage on both sides of the bending mechanism 2 after being bent under pressure, the warpage will prevent the sheet 500 from moving to both sides. Therefore, when the existing forming equipment bends the plate 500, the plate 500 is only required to be positioned by the positioning mechanism, so that the to-be-bent area of the plate 500 corresponds to the position of the cavity 13. However, the plate 500 is turned up mainly by means of upward pressing of the plate 500 by the upper corners at both sides of the cavity 13 to drive the plate 500 to bend and turn up. Because the upper corner of the cavity 13 is relatively sharp, in the process of bending the plate 500, the vertical plate segments forming the bending position of the plate 500 are all extruded by the upper corner, so that the forming quality of the plate 500 at the position of the vertical plate segments is poor, and even the use strength of the plate 500 can be affected. Therefore, the clamping mechanism 3 and the supporting mechanism 4 are provided in the present application; the clamping mechanism 3 can clamp and hold the side parts of the plate 500, so that the plate 500 can not be tilted at the two sides in the bending process; meanwhile, the supporting mechanism 4 can bend and jack up a plate section (namely a vertical plate section corresponding to a bending area of the subsequent plate 500) of the plate 500 close to the cavity 13; through the bending jack-up to this board section, the party can buckle in advance to follow-up and bending mechanism 2 buckle the shaping in advance, on the other hand can be with this board section and workstation interval, so that this board section can not contact or contact force is less with the upper corner of die cavity 13, and then can avoid or reduce the influence of the upper corner of die cavity 13 to the shaping quality of buckling of panel 500.

For ease of understanding, the bending process of the sheet 500 may be described briefly below.

When feeding is performed, the bending mechanism 2 is far away from the workbench, and the clamping mechanism 3 is in a loosening state. When the plate 500 to be bent is placed on the table, both sides of the plate 500 may be positioned exactly in the corresponding clamping mechanisms 3.

When the bending mechanism 2 moves downward to contact the plate 500, the clamping mechanism 3 can clamp the side edge of the plate 500 when being driven by the bending mechanism 2 to move from the release state. During this process, the support mechanism 4 remains stationary.

When the bending mechanism 2 bends and forms the plate 500, the clamping mechanism 3 can keep clamping the plate 500 under the driving of the bending mechanism 2 and move towards the direction approaching to the cavity 13 under the traction of the deformation of the plate 500. Meanwhile, the supporting mechanism 4 can bend and jack the plate 500 close to the plate section of the cavity 13 to be separated from the workbench under the driving of the bending mechanism 2.

It should be appreciated that as the bending deformation of the sheet 500 proceeds, both sides of the sheet 500 need to be moved in a direction approaching the cavity 13 during bending of the sheet 500, and the distance of movement depends on the vertical plate segment height of the bending region of the sheet 500. The clamping mechanism 3 needs to move synchronously with the sides of the sheet 500 to maintain the clamping of the sheet 500.

In this embodiment, as shown in fig. 1, 5, 8 and 10, a supporting frame 11 is fixed above the table on the machine body 1. The bending mechanism 2 comprises at least one lifting device 21 and a forming die 22; the lifting device 21 is fixedly arranged on the supporting frame 11 and is connected with the forming die 22 through an output end, and then the forming die 22 can be matched with the cavity 13 under the driving of the lifting device 21 so as to realize the bending forming of the plate 500. And can cooperate with the holding mechanism 3 and the supporting mechanism 4 during the vertical movement of the forming die 22.

It should be noted that the specific structure and working principle of the lifting device 21 are conventional technology for those skilled in the art, and the common lifting device 21 includes an air cylinder, a hydraulic cylinder, a linear motor, and the like. The specific number of the lifting devices 21 can be selected according to actual needs; generally, if the length of the plate 500 is long, the number of the lifting devices 21 may be selected to be plural, for example, as shown in fig. 1, the number of the lifting devices 21 is a pair and is symmetrical along the length direction of the plate 500.

In this embodiment, as shown in fig. 2, 5, 7 to 10 and 12, the clamping mechanisms 3 are a pair and are respectively located at two sides of the workbench. The clamping mechanism 3 comprises a bottom plate 31, a clamping plate 33 and a pressing sleeve 36; the bottom plate 31 is elastically connected with the machine body 1 in a sliding manner in the horizontal direction, and the sliding direction of the bottom plate 31 is close to or far from the cavity 13; the bottom plate 31 is provided with a mounting cavity 310, and the clamping plate 33 is positioned in the mounting cavity 310 and is vertically and elastically connected with the top of the mounting cavity 310 in a sliding manner through a connecting rod 35 arranged at the upper end; so that a placing cavity for placing the side of the plate 500 can be formed between the clamping plate 33 and the bottom of the installation cavity 310. The pressing sleeve 36 is elastically and slidably connected with a rod section of the connecting rod 35 extending out of the upper part of the bottom plate 31.

When the feeding of the plate 500 is performed, the spacing between the placement cavities is larger than the thickness of the plate 500, and then the side edges of the plate 500 can be just positioned in the placement cavities when the plate 500 is placed on the workbench. As the former 22 moves down into contact with the sheet 500, the former 22 may compress the jacket 36 to drive the clamp plate 33 down to space the space between the chambers until the clamp plate 33 contacts and clamps against the sides of the sheet 500. When the forming die 22 bends the plate 500, since the clamping plate 33 cannot continue to move downwards, the pressing sleeve 36 can adapt to the height change of the forming die 22 by elastically sliding relative to the connecting rod 35, and the clamping plate 33 can keep clamping the side edge of the plate 500, and the clamping force continuously increases; meanwhile, during the bending process of the plate 500, the clamping mechanism 3 can be pulled to move along the machine body 1 towards the direction approaching the cavity 13 through the bottom plate 31 by deformation.

It will be appreciated that the length of the base plate 31 and the clamping plate 33 need to be adapted to the length of the sheet 500. In order to improve the installation stability of the clamping plate 33, the upper end of the clamping plate 33 may be slidably connected to the top of the installation cavity 310 through a plurality of connecting rods 35 spaced apart in the length direction; a plurality of press nips 36 are correspondingly provided. For example, as shown in fig. 2, the number of links 35 and bushings 36 is three.

Specifically, as shown in fig. 2, the bottom plate 31 is L-shaped, and the top plate 32 is fixed to the upper end of the bottom plate 31, so that a desired installation cavity 310 can be formed between the top plate 32 and the bottom plate 31.

Meanwhile, for the sliding installation of the bottom plate 31 and the machine body 1, the bottom plate 31 and the sliding groove arranged on the machine body 1 can be in sliding installation, or the bottom plate 31 and the guide rod arranged on the machine body 1 can be in sliding installation. For convenience of description, the base plate 31 and the guide rod provided on the machine body 1 are slidingly mounted for illustration; in order to stabilize the sliding of the bottom plate 31, a plurality of guide rods are required, for example, as shown in fig. 2, two guide rods are provided and are respectively connected with two ends of the bottom plate 31 in a sliding manner.

Specifically, as shown in fig. 2, 5, 8 and 10, the clamping mechanism 3 further includes a first return spring 34; the first return spring 34 is sleeved on the guide rod, and two ends of the first return spring 34 are respectively connected with the machine body 1 and the bottom plate 31. The first return spring 34 is always in a compressed state; when the bending mechanism 2 bends the plate 500, the clamping mechanism 3 can compress the sliding of the first return spring 34 along the guide rod through the bottom plate 31 by the traction of the plate 500. When the plate 500 is fed after the plate 500 is bent, the forming die 22 is driven by the lifting device 21 to vertically move upwards; when the forming die 22 moves up to the clamping plate 33 to loosen the clamping of the plate 500, the bottom plate 31 can drive the whole clamping mechanism 3 to move away from the die cavity 13 along the guide rod under the reset elastic force of the first reset spring 34 until the limit position is set.

In this embodiment, the limiting position of the clamping mechanism 3 away from the cavity 13 under the driving of the first return spring 34 may be set as the first position, so that the distance from the first position to the cavity 13 may be adjustable, and the clamping mechanism 3 may be adapted to bending processing of the plate 500 with different widths.

It should be noted that in order to accommodate the bending process of the sheet material 500 of different widths, a plurality of distance values need to be set for the first position of the clamping mechanism 3 to achieve clamping of the side edges of the sheet material 500 of different widths. There are various ways of adjusting the distance from the first position to the cavity 13, for example, a threaded section is provided at one end of the guide rod far away from the cavity 13, and a nut is screwed on the threaded section to abut against the bottom plate 31; when the plates 500 with different widths are required to be clamped, the nuts are only required to be screwed to adjust the positions of the nuts on the guide rods.

Specifically, as shown in fig. 2, 7, 9 and 12, the clamping mechanism 3 further includes a first spring 37 and a second spring 38. The first spring 37 is sleeved on a rod section of the connecting rod 35 in the mounting cavity 310, and two ends of the first spring 37 are respectively connected with the clamping plate 33 and the top plate 32; the second spring 38 is positioned in the pressing sleeve 36, and two ends of the second spring 38 are respectively connected with the upper end of the connecting rod 35 and the inner end of the pressing sleeve 36; the second spring 38 has a larger spring constant than the first spring 37.

For ease of understanding, the specific operation of the clamping mechanism 3 will be described below.

When loading is performed, as shown in fig. 7, the clamping plate 33 keeps the placement area open under the elastic force of the first spring 37, and the pressing sleeve 36 is at the highest position under the elastic force of the second spring 38; at this point the top of the forming die 22 and the press jacket 36 are spaced apart.

In the process of moving the forming die 22 downward to contact the plate 500, as shown in fig. 9, the top of the pressing sleeve 36 is contacted and pressed as the height of the forming die 22 is lowered, and since the elastic coefficient of the second spring 38 is greater than that of the first spring 37, the pressing sleeve 36 presses the connecting rod 35 through the second spring 38 to drive the connecting rod 35 to drive the clamping plate 33 to move downward, so that the side edge of the plate 500 is clamped and fixed between the clamping plate 33 and the bottom plate 31. In this process, the first spring 37 is changed from the free state to the extended state, and the second spring 38 is in a state where the compression amount is not large.

When the forming die 22 performs the bending forming process of the plate 500, as shown in fig. 12, the forming die 22 continues to move down, and the pressing sleeve 36 slides down along the connecting rod 35 to compress the second spring 38 under the extrusion of the forming die 22, so that the pressing sleeve 36 can change in height with the forming die 22 and maintain the clamping of the side edge of the plate 500 by the clamping plate 33. At the same time, the clamping mechanism 3 can keep the constant horizontal movement of the height of the pressing sleeve 36 under the traction of the deformation of the plate 500.

When the forming die 22 moves upwards, the pressing sleeve 36 moves upwards under the elasticity of the second spring 38, and the first spring 37 drives the clamping plate 33 to be far away from the plate 500 until the second spring 38 is in a free state; i.e. the clamping mechanism 3 releases the clamping of the sheet 500. When the clamping mechanism 3 releases the sheet 500, the clamping mechanism 3 may be returned to the first position by the elastic force of the first return spring 34.

In this embodiment, as shown in fig. 2, 7, 9 and 12, a roller 39 is mounted on the top of the pressing sleeve 36, and the pressing sleeve 36 may be matched with the forming die 22 through the roller 39; when the clamping mechanism 3 moves along the machine body 1 in a direction approaching the cavity 13, the pressing sleeve 36 can horizontally roll along the forming die 22 through the roller 39, so that sliding friction between the pressing sleeve 36 and the forming die 22 is changed into rolling friction to reduce friction between the pressing sleeve 36 and the forming die 22.

In this embodiment, as shown in fig. 1, 3, 6 and 11, the supporting mechanism 4 is a pair and is respectively located at two sides of the cavity 13; the support mechanism 4 includes a trigger assembly 41 and a jacking member. The jacking members are rotatably mounted to the side of the table adjacent the cavity 13 and include raised sections above the table and flush sections flush or below the table. The trigger assembly 41 is mounted to the table and adapted to cooperate with the forming die 22, while the trigger assembly 41 is in driving connection with the jack-up member.

When the forming die 22 bends the sheet 500, the trigger assembly 41 can drive the jack-up member to rotate under the extrusion of the forming die 22. In the process of rotating the jacking component, the friction force between the jacking component and the plate 500 can drive the plate 500 to generate a force for moving towards the cavity 13, namely, the resistance generated by deformation movement of the plate 500 due to the friction force between the clamping mechanism 3 and the forming die 22 is compensated; on the other hand, the jack-up member jacks up and bends the plate segment to be bent of the plate 500 by the convex segment so that the plate segment can be pre-bent before contacting with the forming die 22 and is not contacted with the side upper corner of the cavity 13 by jack-up. When the forming die 22 finishes bending the plate 500, the jack-up member can be rotated to a level section corresponding to the plate 500, so that the forming die 22 can flatten the plate section of the plate 500 which is not bent, thereby ensuring that the shape of the plate 500 after bending and forming meets the requirement.

It should be appreciated that the final shape of the sheet 500 of the present application after the bending is completed is as shown in fig. 10, i.e., the horizontal segments of the bending region of the sheet 500 need to be parallel to the unbent segments of the sheet 500. If the jacking member jacks up the plate 500 all the time, the unbent region of the plate 500 will also be partially complete, and the forming of the plate 500 will not meet the requirements. Therefore, in this embodiment, the raised section and the flat section are provided on the jack-up member, and the correspondence of the raised section and the flat Ji Duan to the plate 500 is achieved by the rotation of the top member.

In this embodiment, there are various specific structures of the jacking members, one of which is shown in fig. 2, 7, 9 and 12, and the worktable is provided with receiving grooves 12 on both sides of the cavity 13. The jack-up member is a cam roller 42, and the cam roller 42 is rotatably mounted to the accommodating groove 12 via a rotation shaft 43. The surface of the cam roller 42 in the circumferential direction includes a long stroke section 421 and a short stroke section 422 each having an arc shape. The distance from the long travel section 421 to the center of the rotating shaft 43 is greater than the vertical distance from the workbench to the center of the rotating shaft 43; the distance from the short stroke section 422 to the center of the rotating shaft 43 is smaller than or equal to the vertical distance from the workbench to the center of the rotating shaft 43; the long travel section 421 forms a convex section and the short travel section 422 forms a flush section.

It should be appreciated that as the bending process of sheet 500 proceeds, cam roller 42 rotates from the long travel segment 421 into contact with sheet 500 to the segment travel segment 422 into corresponding or contact with sheet 500. That is, the jacking height of the plate 500 by the cam roller 42 is gradually reduced in a period of time when the bending is about to be finished, until the plate 500 just completes the bending, and the jacking effect of the plate 500 by the cam roller 42 is lost.

In this embodiment, as shown in fig. 3 to 5, 8 and 10, the trigger assembly 41 includes a toothed plate 411 and a gear set. The toothed plate 411 is slidably mounted on the machine body 1, the bottom of the toothed plate 411 extends out of the machine body 1 and is fixedly provided with a connecting plate 415, and a second return spring 416 is connected between the connecting plate 415 and the machine body 1; the toothed plate 411 is elastically slidably mounted with the body 1 by the second return spring 416. The input of the gear set may be engaged with a rack segment on the toothed plate 411 and the output of the gear set may be in driving connection with the spindle 43.

When the former 22 moves down to contact the sheet 500, the rack segments on the toothed plate 411 will be engaged with the input end of the gear set. When the forming die 22 bends the plate 500, the toothed plate 411 moves vertically under the extrusion of the forming die 22, and the rotating shaft 43 drives the cam roller 42 to rotate correspondingly through the engagement of the rack segments and the gear set. When the forming die 22 completes bending and upward moving the plate 500, the toothed plate 411 may be vertically upward moved to a set position by the elastic force of the second return spring 416 in a deformed state.

It should be appreciated that the number of gears included in the gear set may be one or more. The method can be specifically determined according to the actual stroke speed ratio; for example, as shown in FIG. 3, the gear set includes two gears, a first gear 412 and a second gear 413, respectively, that intermesh with each other; the first gear 412 may be engaged with a rack segment on the toothed plate 411. The second gearwheel 413 can be in driving connection with the rotating shaft 43 via a centrally mounted traction shaft 414. There are a variety of common drive arrangements, such as belt drives and chain drives.

In the present embodiment, as shown in fig. 1, 5, 8 and 10, the molding die 22 includes the pressing portion and the core 221 fixedly connected from top to bottom. The core 221 is of a T-shaped structure, the core 221 can be matched with the cavity 13 through the middle part, and two sides of the core 221 extend to squeeze and cover the installation position of the supporting mechanism 4, so that the unbent plate section is in a horizontal state after the plate 500 is bent. The pressing part includes a base plate 223 and a base 222 fixedly connected from top to bottom; the width of the base plate 223 is larger than that of the base plate 222, and the base plate 223 can be in extrusion and rolling fit with the roller 39 on the clamping mechanism 3. The base 222 may be press fit with the top of the toothed plate 411 on the support mechanism 4.

It will be appreciated that the location of the clamping mechanism 3 and the support mechanism 4 from the cavity 13 are different and that the engagement may be performed by separate engagement members (base 222 and base plate 223) in order to avoid interference between the two.

The invention also provides a rapid forming process of the steel structure, which comprises the following steps of:

s1, positioning a plate, namely placing the plate on a workbench, then starting a bending mechanism, and driving a clamping mechanism to clamp and position two sides of the plate when the bending mechanism acts, wherein the plate can be positioned through the clamping mechanism until the plate bending process is finished.

S2, pre-bending, wherein the bending mechanism 2 cooperates with the supporting mechanism 4 to pre-bend the positioned plate when gradually acting;

s3, performing formal bending forming, namely performing formal bending on the plate along with the continuous action of the bending mechanism, wherein a section of gap is reserved between the plate and the workbench while the plate is pre-bent by the supporting mechanism in advance, so that the pre-bent plate section is not contacted with the top end of the side part of the cavity in the bending process.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A steel structure rapid prototyping apparatus, comprising:

a body; a workbench for placing plates is arranged on the machine body, and a cavity is formed in the middle of the workbench;

a bending mechanism; the bending mechanism is arranged on the machine body and is positioned above the workbench, and is suitable for being matched with the cavity to bend and shape the plate;

a clamping mechanism; the clamping mechanisms are arranged on two sides of the workbench and used for clamping two sides of the plate; and

a support mechanism; the supporting mechanisms are arranged on two sides of the workbench and close to the cavity;

in the process of bending and forming the plate by the bending mechanism, the clamping mechanism is suitable for keeping clamping the plate under the driving of the bending mechanism and moving towards the direction close to the cavity under the traction of deformation of the plate; simultaneously, the supporting mechanism is suitable for bending and jacking the plate close to the plate section of the cavity under the drive of the bending mechanism until the plate is separated from the workbench.

2. The steel structure rapid prototyping apparatus of claim 1 wherein: a supporting frame is fixed above the workbench by the machine body; the bending mechanism comprises at least one lifting device and a forming die; the lifting device is fixedly arranged on the support frame and is connected with the forming die through an output end, and then the forming die is driven by the lifting device to be matched with the cavity to bend and form the plate; and is adapted to cooperate with the clamping mechanism and the support mechanism during vertical movement of the forming die.

3. A steel structure rapid prototyping apparatus as claimed in claim 2 wherein the clamping mechanism comprises:

a bottom plate; the bottom plate is elastically connected with the machine body in a sliding manner, and an installation cavity is formed in the bottom plate;

a clamping plate; the clamping plate is positioned in the mounting cavity and is vertically elastically connected with the top of the mounting cavity in a sliding manner through a connecting rod; and

pressing the sleeve; the pressing sleeve is elastically and slidably connected with a rod section of the connecting rod extending out of the upper part of the bottom plate;

when the plate is fed, the side edge of the plate is positioned at the bottom of the mounting cavity;

when the forming die moves downwards to contact the plate, the forming die is suitable for extruding the pressing sleeve to drive the clamping plate to clamp the side edge of the plate;

when the forming die bends the plate, the pressing sleeve elastically slides to keep the clamping plate clamped on the side edge of the plate; simultaneously, the clamping mechanism moves along the machine body to the direction close to the cavity through the bottom plate under the traction of the deformation of the plate.

4. A steel structure rapid prototyping apparatus as claimed in claim 3 wherein: the top of the pressing sleeve is provided with a roller, and the pressing sleeve is suitable for being matched with the forming die through the roller; and when the clamping mechanism moves along the machine body in a direction approaching to the cavity, the pressing sleeve is suitable for rolling along the forming die through the roller.

5. A steel structure rapid prototyping apparatus as claimed in claim 3 wherein: the bottom plate performs plate feeding at a first position of the machine body; the distance from the first position to the cavity is adjustable.

6. A steel structure rapid prototyping apparatus as claimed in any one of claims 3 to 5 wherein the support mechanism comprises:

a jack-up member; the jacking component is rotatably arranged at the side part of the workbench, which is close to the cavity, and comprises a convex section higher than the workbench and a flush section which is flush with or lower than the workbench; and

a trigger assembly; the trigger component is arranged on the workbench and is suitable for being matched with the forming die;

when the forming die bends the plate, the trigger assembly is suitable for driving the jacking component to rotate under the extrusion of the forming die, and then the jacking component jacks up and bends the plate section to be bent of the plate through the protruding section;

when the forming die finishes bending the plate, the jacking component rotates until the flush section corresponds to the plate, so that the forming die flattens the plate section, which is not bent, of the plate.

7. The steel structure rapid prototyping apparatus of claim 6 wherein: the workbench is provided with accommodating grooves on two sides of the cavity; the jacking component is a cam roller, and the cam roller is rotatably arranged in the accommodating groove through a rotating shaft; the surface of the cam roller in the circumferential direction comprises a long stroke section and a short stroke section which are arc-shaped; the distance from the long travel section to the center of the rotating shaft is larger than the vertical distance from the workbench to the center of the rotating shaft; the distance from the short stroke section to the center of the rotating shaft is smaller than or equal to the vertical distance from the workbench to the center of the rotating shaft; the long stroke section forms the convex section and the short stroke section forms the flush section.

8. The steel structure rapid prototyping apparatus of claim 7 wherein: the trigger assembly comprises a toothed plate and a gear set; the rack plate is vertically and elastically slidably arranged on the machine body, the input end of the gear set is suitable for being meshed with the rack section on the rack plate, and the output end of the gear set is suitable for being in transmission connection with the rotating shaft;

when the forming die bends the plate, the toothed plate vertically moves under the extrusion of the forming die, and then the rotating shaft is driven to drive the cam roller to rotate through the engagement of the rack section and the gear set.

9. A steel structure rapid prototyping apparatus as claimed in claim 2 wherein: the forming die comprises an extrusion part and a core which are fixedly connected from top to bottom; the mold core is of a T-shaped structure, the mold core is suitable for being matched with the cavity through the middle part, and two sides of the mold core extend to be suitable for extrusion covering of the mounting position of the supporting mechanism; the pressing portion is adapted to cooperate with the clamping mechanism and the supporting mechanism.

10. A rapid forming process of a steel structure, applied to the rapid forming equipment of the steel structure as claimed in any one of claims 1 to 9, characterized by comprising the following steps:

s1, positioning a plate, namely placing the plate on a workbench, starting a bending mechanism, driving a clamping mechanism to clamp and position two sides of the plate when the bending mechanism acts, and realizing plate positioning through the clamping mechanism until the plate bending process is finished;

s2, pre-bending, namely pre-bending the positioned plate by matching with the supporting mechanism when the bending mechanism gradually acts;

s3, performing formal bending forming, namely performing formal bending on the plate along with the continuous action of the bending mechanism, wherein a section of gap is reserved between the plate and the workbench while the plate is pre-bent by the supporting mechanism in advance, so that the pre-bent plate section is not contacted with the top end of the side part of the cavity in the bending process.