阅读说明：本技术 一种不锈钢厚壁直缝焊管渐进式多步折弯成形装置 (Progressive multi-step bending forming device for stainless steel thick-wall straight welded pipe ) 是由 张芳萍 楚志兵 桂海莲 帅美荣 赵晓东 李岩 于 2021-09-10 设计创作，主要内容包括：一种不锈钢厚壁直缝焊管渐进式多步折弯成形装置,属于直缝不锈钢焊管生产技术领域,本成形装置共有8个数控轴,采用六缸式电液伺服同步数控液压板料成形,工作精度由数控系统、高性能伺服液压控制电液同步控制系统及光栅尺来保证,本成形装置包括成形主机、模具、升降辊道、前托料架、前推料机、后托料架、后推料机和侧出料机。本发明采用渐进式多步折弯成形的方法,利用折弯装置的上模圆弧模头将不锈钢板经多次压弯成多边形近似于圆的端面形状,然后对圆管开口处进行焊接,成为直缝焊管。本装置可使不锈钢板变形均匀,残余应力小,表面不产生划伤,可拓展管材的规格范围,既可生产大口径高强度厚壁管,也可生产小口径大壁厚不锈钢管。(The utility model provides a progressive multistep forming device that bends of stainless steel thick wall transversal joint pipe, belongs to transversal joint stainless steel welded tube production technical field, and this forming device total 8 numerical control axles adopt six jar formula electricity liquid servo synchronous numerical control hydraulic pressure sheet material to take shape, and the work precision is guaranteed by numerical control system, high performance servo hydraulic control electricity liquid synchronous control system and grating chi, and this forming device includes shaping host computer, mould, lift roll table, front stock support frame, preceding pusher, back stock support frame, back pusher and side discharge machine. The invention adopts a progressive multi-step bending forming method, an upper mould arc die head of a bending device is utilized to bend a stainless steel plate into a polygonal end surface shape similar to a circle for multiple times, and then the opening of a circular tube is welded to form a straight welded tube. The device can lead the stainless steel plate to deform uniformly, has small residual stress and no scratch on the surface, can expand the specification range of the pipe, and can produce large-caliber high-strength thick-walled pipes and small-caliber large-wall-thickness stainless steel pipes.)

1. The utility model provides a progressive multistep forming device that bends of stainless steel thick wall straight welded pipe which characterized in that: the forming device comprises a forming host (1), a die (2), a lifting roller way (3), a front material supporting frame (4), a front material pushing machine (5), a rear material supporting frame (6), a rear material pushing machine (7) and a side material discharging machine (8);

the mould (2) is installed on a forming main machine (1), a lifting roller way (3) is arranged on the front side of the forming main machine (1), a plurality of front support material racks (4) are arranged below the lifting roller way (3), a front pusher (5) is arranged between adjacent front support material racks (4), the lifting roller way (3) is located at an upper limit position in an initial state and is located at the same horizontal plane with a plate conveying roller way, when the plate conveying roller way conveys a plate into the lifting roller way (3), the lifting roller way (3) pushes the plate to be completely conveyed onto the lifting roller way (3), then the lifting roller way (3) descends to a lower limit position, and the plate falls on the front support material racks (4); the rear material supporting frames (6) are arranged on the rear side of the forming main machine (1), and the rear material pushing machine (7) is arranged on the rear side of the forming main machine (1) and corresponds to the front material pushing machine (5); a side discharging machine (8) is arranged at a discharging position at one side of the forming main machine (1);

the forming main machine (1) comprises a base (1.1), a left upright post (1.2), a right upright post (1.3), an upper cross beam (1.4), a sliding block (1.5), a hydraulic cylinder I (1.6), a workbench vertical plate (1.7) and a mechanical wedge block type convex workbench (1.8), wherein the base (1.1), the left upright post (1.2), the right upright post (1.3) and the upper cross beam (1.4) form a memorial archway type frame structure, the left upright post (1.2) and the right upright post (1.3) are oppositely arranged at the head and the tail sides of the base (1.1), the upper cross beam (1.4) is fixedly arranged in an inner frame corresponding to the left upright post (1.2) and the right upright post (1.3), and the sliding block (1.5) is arranged in the inner frame of the left upright post (1.2) and the right upright post (1.3); the hydraulic cylinders I (1.6) are uniformly distributed below the upper cross beam (1.4) in an even number and at least six hydraulic cylinders I (1.6) are vertically and downwards along the length direction, the plurality of workbench vertical plates (1.7) are horizontally arranged below the hydraulic cylinders I (1.6), piston rods of every two hydraulic cylinders I (1.6) are fixedly connected with the head end and the tail end of one workbench vertical plate (1.7), the hydraulic cylinders I (1.6) respectively drive the plurality of workbench vertical plates (1.7) to synchronously or independently move along the vertical direction, and the workbench vertical plates (1.7) positioned on the head side and the tail side are respectively and fixedly connected with corresponding sliding blocks (1.5); the mechanical wedge type convex workbench (1.8) is arranged on the base (1.1) and is positioned below the workbench vertical plate (1.7);

the die (2) comprises an upper die (2.1) and a lower die (2.2), the upper die (2.1) is installed below a vertical plate (1.7) of the workbench, the lower die (2.2) is installed on the base (1.1), the upper die (2.1) and the lower die (2.2) are arranged oppositely, and the mechanical wedge type convex workbench (1.8) penetrates through the lower die (2.2) and extends into a forming cavity;

the side discharging machine (8) comprises a discharging machine sliding rail (8.11), a side pushing discharging trolley (8.13) and a hydraulic follow-up jacking device (8.14), a sliding seat (8.12) is arranged below the side pushing discharging trolley (8.13), the discharging machine sliding rail (8.11) is arranged below the sliding seat (8.12), and the sliding seat (8.12) is matched with the discharging machine sliding rail (8.11); the rotor of the motor II (8.4) is connected with the power input shaft of the speed reducer II (8.5), the power output shaft of the speed reducer II (8.5) is connected with the rotating shaft (8.6), the chain wheel I (8.7) is installed on the rotating shaft (8.6), the chain wheel I (8.7) drives the chain wheel II (8.8) and the chain wheel III (8.9) to rotate together through the chain (8.10), the side-push discharging trolley (8.13) is driven to move along the sliding rail (8.11) in the moving process of the chain (8.10), and the bent stainless steel pipe is pushed out from the discharging position on one side of the forming host (1); the hydraulic follow-up jacking devices (8.14) are uniformly distributed in the lower die (2.2) along the length direction, each hydraulic follow-up jacking device (8.14) comprises a hydraulic cylinder III (8.14.1), a roller seat (8.14.2) and a discharging conveying roller (8.14.3), each discharging conveying roller (8.14.3) is installed on the corresponding roller seat (8.14.2), the hydraulic cylinders III (8.14.1) drive the roller seats (8.14.2) to drive the discharging conveying rollers (8.14.3) to vertically move upwards, and each hydraulic follow-up jacking device (8.14) is correspondingly provided with a hydraulic jacking roller (8.15).

2. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: the mechanical wedge type convex working table (1.8) is a deflection compensation working table, and 31 groups of lifting wedge blocks with inclined planes are arranged in the mechanical wedge type convex working table (1.8).

3. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: the hydraulic cylinder I (1.6) is provided with six, every two hydraulic cylinders I (1.6) are arranged into a group, a grating ruler is arranged at the position of each group of hydraulic cylinder I (1.6), and the numerical control system controls the six hydraulic cylinders I (1.6) to drive the three workbench vertical plates (1.7) to move by controlling the output flow of the three electro-hydraulic servo valves.

4. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: according to the thickness of the plate, a plurality of working platform vertical plates (1.7) are determined to synchronously or independently move along the vertical direction.

5. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: two sets of hydraulic follow-up material supporting mechanisms are arranged on the front side of the forming main machine (1).

6. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: the upper die (2.1) comprises a die head (2.1.1), an upper die base (2.1.2) and an upper die handle (2.1.3), the upper die base (2.1.2) is arranged below the upper die handle (2.1.3), the die head (2.1.1) is arranged on the upper die base (2.1.2), and the arc radius of the forming surface of the die head (2.1.1) is selected according to the diameter of a pipe blank to be formed; lower mould (2.2) include die holder (2.2.1), lower module (2.2.2) and opening regulating block (2.2.3), lower module (2.2.2) are installed on die holder (2.2.1), opening regulating block (2.2.3) set up in the inboard of lower module (2.2.2), opening regulating block (2.2.3) comprise the backing plate that a plurality of thickness are fixed, increase or reduce the quantity of backing plate according to the diameter of waiting to take shape the pipe.

7. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: the lifting roller way (3) comprises a hydraulic cylinder II (3.1), a sliding plate I (3.2), a motor I (3.3), a speed reducer I (3.4) and twelve lifting power rollers (3.5), the twelve lifting power rollers (3.5) are equally divided into four groups, the motor I (3.3) drives the lifting power rollers (3.5) to rotate through the speed reducer I (3.4), a piston rod of the hydraulic cylinder II (3.1) is hinged with the sliding plate I (3.2), and the hydraulic cylinder II (3.1) drives the sliding plate I (3.2) to drive the lifting power rollers (3.5) to move along the vertical direction.

8. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: the front material supporting frame (4) and the rear material supporting frame (6) adopt roller type structures, and the upper planes of the roller shafts on the front material supporting frame (4) and the rear material supporting frame (6) are 2mm higher than the upper plane of the lower die (2.2).

9. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: the front material pushing machine (5) is provided with two sets, the front material pushing machine (5) comprises a guide rail (5.1), a material pushing trolley (5.2) and a servo driving device, and the servo driving device drives the material pushing trolley (5.2) to slide along the guide rail (5.1) so as to push the plate materials into the lower die (2.2).

10. The progressive multi-step bending forming device for the stainless steel thick-wall straight welded pipe according to claim 1, characterized in that: the structure of the rear and rear pushers (7) is the same as that of the front pusher (5).

Technical Field

The invention belongs to the technical field of straight-seam stainless steel welded pipe production, and particularly relates to a progressive multi-step bending forming device for a stainless steel thick-wall straight-seam welded pipe.

Background

The stainless steel straight welded pipe is a stainless steel pipe made by bending and welding a stainless steel plate, and is mainly used in numerous fields with extremely high requirements on corrosion resistance, such as petrochemical industry, ocean engineering and the like. The pipe can be widely applied to the aspects of petrochemical industry, chemical industry, electric power industry, urban construction and the like, can convey liquid and gas, and can also be used as a pipe for piling, bridges, wharfs, roads and building structures.

The preparation process of the traditional thick-wall straight welded pipe mainly comprises two steps, namely, firstly, bending a steel plate into a U shape on a press machine, then, forming an O-shaped pipe barrel by using two semi-circles on an O-shaped forming press machine through die pressing, and finally, welding the O-shaped pipe barrel into the steel pipe. The method is difficult to produce the steel pipe with larger diameter due to the limitation of the plate width, and a large-scale press machine is needed, so the method has the defects of large equipment investment, complex manufacturing and maintenance and difficulty.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a progressive multi-step bending forming device for a stainless steel thick-wall straight welded pipe, which adopts six-cylinder electro-hydraulic servo synchronous numerical control hydraulic plate forming, is a powerful forming device in the production of the stainless steel thick-wall straight welded pipe and can produce various multi-specification thick-wall straight welded stainless steel pipes.

The invention is realized by the following technical scheme.

A progressive multi-step bending forming device for a stainless steel thick-wall straight welded pipe is provided, wherein the forming device comprises 8 numerical control shafts, and the working precision is ensured by a numerical control system, a high-performance servo hydraulic control electro-hydraulic synchronous control system and a grating ruler. The forming device comprises a forming host, a die, a lifting roller way, a front material supporting frame, a front material pushing machine, a rear material supporting frame, a rear material pushing machine and a side material discharging machine;

the mould is arranged on a forming host, a lifting roller way is arranged on the front side of the forming host, a plurality of front support material racks are arranged below the lifting roller way, a front pusher is arranged between adjacent front support material racks, the lifting roller way is positioned at an upper limit position in an initial state and is positioned at the same horizontal plane with a sheet material conveying roller way, when the sheet material conveying roller way conveys the sheet material into the lifting roller way, the lifting roller way pushes the sheet material to be completely conveyed onto the lifting roller way, then the lifting roller way descends to a lower limit position, and the sheet material falls on the front support material racks; the rear material supporting frames are arranged on the rear side of the forming main machine, and the rear material pushing machine is arranged on the rear side of the forming main machine and corresponds to the front material pushing machine in position; a side discharging machine is arranged at the discharging position at one side of the forming host machine;

the forming main machine comprises a base, a left upright post, a right upright post, an upper cross beam, a sliding block, a hydraulic cylinder I, a workbench vertical plate and a mechanical wedge block type convex workbench, wherein the base, the left upright post, the right upright post and the upper cross beam form a memorial archway type frame structure; the hydraulic cylinders I are uniformly distributed below the upper cross beam in an even number and at least six hydraulic cylinders I are vertically downward along the length direction, the plurality of workbench vertical plates are horizontally arranged below the hydraulic cylinders I, piston rods of every two hydraulic cylinders I are fixedly connected with the head end and the tail end of one workbench vertical plate, the hydraulic cylinders I respectively drive the plurality of workbench vertical plates to synchronously or independently move along the vertical direction, and the workbench vertical plates positioned on the head end and the tail end are respectively and fixedly connected with corresponding sliding blocks; the mechanical wedge type convex workbench is arranged on the base and is positioned below the workbench vertical plate;

the die comprises an upper die and a lower die, the upper die is arranged below a vertical plate of the workbench, the lower die is arranged on the base, the upper die and the lower die are arranged oppositely, and the mechanical wedge type convex workbench penetrates through the lower die and extends into the forming cavity;

the side discharging machine comprises a discharging machine sliding rail, a side pushing discharging trolley and a hydraulic follow-up jacking device, wherein a sliding seat is arranged below the side pushing discharging trolley, the discharging machine sliding rail is arranged below the sliding seat, and the sliding seat is matched with the discharging machine sliding rail; the rotor of the motor II is connected with the power input shaft of the speed reducer II, the power output shaft of the speed reducer II is connected with the rotating shaft, the chain wheel I is installed on the rotating shaft, the chain wheel I drives the chain wheel II and the chain wheel III to rotate together through a chain, the side-push discharging trolley is driven to move along the sliding rail in the chain movement process, and the bent stainless steel pipe is pushed out from the discharging position on one side of the forming host; a plurality of hydraulic servo jacking devices are uniformly distributed in the lower die along the length direction, each hydraulic servo jacking device comprises a hydraulic cylinder III, a roller seat and a discharge conveying roller, the discharge conveying roller is mounted on the roller seat, the hydraulic cylinder III drives the roller seat to drive the discharge conveying roller to vertically move upwards, and a hydraulic jacking roller is correspondingly arranged at the position of each hydraulic servo jacking device.

Furthermore, the mechanical wedge type convex workbench is a deflection compensation workbench, and a set of lifting type wedge blocks with inclined surfaces are installed in the mechanical wedge type convex workbench.

Furthermore, the hydraulic cylinders I are provided with six hydraulic cylinders, every two hydraulic cylinders I are set into a group, a grating ruler is arranged at the position of each group of hydraulic cylinders I, and the numerical control system controls the six hydraulic cylinders I to drive the three workbench vertical plates to move by controlling the output flow of the three electro-hydraulic servo valves.

And further, determining that the plurality of workbench vertical plates synchronously or independently move in the vertical direction according to the thickness of the plate.

Furthermore, two sets of hydraulic follow-up material supporting mechanisms are arranged on the front side of the forming main machine.

Further, the upper die comprises a die head, an upper die holder and an upper die handle, the upper die holder is arranged below the upper die handle, the die head is arranged on the upper die holder, and the arc radius of a die head forming surface is selected according to the diameter of the pipe blank to be formed; the lower die comprises a lower die base, a lower die block and an opening adjusting block, the lower die block is installed on the lower die base, the opening adjusting block is arranged on the inner side of the lower die block, the opening adjusting block is composed of a plurality of backing plates with fixed thicknesses, and the number of the backing plates is increased or reduced according to the diameter of a pipe blank to be formed.

Furthermore, the lifting roller way comprises a hydraulic cylinder II, a sliding plate I, a motor I, a speed reducer I and twelve lifting power rollers, the twelve lifting power rollers are equally divided into four groups, the motor I drives the lifting power rollers to rotate through the speed reducer I, a piston rod of the hydraulic cylinder II is hinged to the sliding plate I, and the hydraulic cylinder II drives the sliding plate I to drive the lifting power rollers to move along the vertical direction.

Furthermore, the front material supporting frame and the rear material supporting frame adopt roller type structures, and the upper planes of the upper roller shafts of the front material supporting frame and the rear material supporting frame are 2mm higher than the upper plane of the lower die.

Furthermore, the front material pushing machines are provided with two sets, each front material pushing machine comprises a guide rail, a material pushing trolley and a servo driving device, and the servo driving devices drive the material pushing trolleys to slide along the guide rails so as to push the plates into the lower die.

Further, the structure of the rear and rear pushers is the same as that of the front pushers.

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

the invention provides a progressive multi-step bending and forming device for a stainless steel thick-wall straight welded pipe, which adopts a progressive multi-step bending and forming method, and mainly utilizes an upper die arc die head of a bending device to bend a stainless steel plate into a polygonal end surface shape similar to a circle for multiple times, and then welds an opening of a circular pipe to form the straight welded pipe. The method can lead the stainless steel plate to deform uniformly, has small residual stress and no scratch on the surface, can expand the specification range of the pipe, can produce large-caliber high-strength thick-walled pipes and small-caliber large-wall-thickness stainless steel pipes, and meets the requirement of large forming force.

Drawings

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

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic structural view of a side discharging machine;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 3 at position A;

FIG. 5 is a left side view of the present invention;

FIG. 6 is a partially enlarged schematic view of the hydraulic follow-up jacking device at position B in FIG. 5;

FIG. 7 is a schematic view of a partially enlarged structure at the position C (conveying lifting roller bed) in FIG. 5;

FIG. 8 is a schematic view of the mold assembly;

FIG. 9 is a partially enlarged view of the structure at the position D in FIG. 8;

in the figure:

1 is a forming host, 1.1 a base, 1.2 is a left upright, 1.3 is a right upright, 1.4 is an upper beam, 1.5 is a sliding block, 1.6 is a hydraulic cylinder I, 1.7 is a workbench vertical plate, and 1.8 is a mechanical wedge block type convex workbench;

2 is a die, 2.1 is an upper die, 2.1.1 is a die head, 2.1.2 is an upper die base, and 2.1.3 is an upper die handle; 2.2 is a lower die, 2.2.1 is a lower die base, 2.2.2 is a lower die block, and 2.2.3 is an opening adjusting block;

3, a lifting roller way, 3.1, a hydraulic cylinder II, 3.2, a sliding plate I, 3.3, a motor I, 3.4, a speed reducer I and 3.5, a lifting power roller;

4 is a front material supporting frame;

5 is a front pusher, 5.1 is a guide rail, and 5.2 is a pushing trolley;

6 is a rear material supporting frame, 6.1 is a fine forming rolling mill I, 6.2 is a fine forming rolling mill II, and 6.3 is a fine forming rolling mill III;

7 is a rear pusher;

8 is side discharger, 8.1 is adjusting bolt, 8.2 is slide II, 8.3 is fixing bolt, 8.4 is motor II, 8.5 is speed reducer II, 8.6 is the axis of rotation, 8.7 is sprocket I, 8.8 is sprocket II, 8.9 is sprocket III, 8.10 chain, 8.11 discharger slide rail, 8.12 is the slide, 8.13 is the side ejection of compact dolly, 8.14 is hydraulic pressure follow-up jacking system, 8.14.1 is pneumatic cylinder III, 8.14.2 is the roller seat, 8.14.3 is ejection of compact conveying roller, 8.15 is hydraulic pressure jacking gyro wheel.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the examples follow conventional experimental conditions. In addition, it will be apparent to those skilled in the art that various modifications or improvements can be made to the material components and amounts in these embodiments without departing from the spirit and scope of the invention as defined in the appended claims.

Fig. 1 to 9 show a progressive multi-step bending forming device for a stainless steel thick-wall straight welded pipe, which comprises a forming main machine 1, a die 2, a lifting roller way 3, a front material supporting frame 4, a front material pushing machine 5, a rear material supporting frame 6, a rear material pushing machine 7 and a side material discharging machine 8;

the die 2 is installed on a forming main machine 1, a lifting roller way 3 is arranged on the front side of the forming main machine 1, a plurality of front support material racks 4 are arranged below the lifting roller way 3, a front material pushing machine 5 is arranged between adjacent front support material racks 4, the lifting roller way 3 is located at an upper limit position in an initial state and is located on the same horizontal plane with a plate conveying roller way, when the plate conveying roller way conveys a plate into the lifting roller way 3, the lifting roller way 3 pushes the plate to be completely conveyed onto the lifting roller way 3, then the lifting roller way 3 descends to a lower limit position, and the plate falls on the front support material racks 4; the rear material supporting frames 6 are arranged on the rear side of the forming main machine 1, and the rear material pushing machine 7 is arranged on the rear side of the forming main machine 1 and corresponds to the front material pushing machine 5 in position; a side discharging machine 8 is arranged at the discharging position at one side of the forming main machine 1; the auxiliary machine matched with the forming main machine 1 consists of a lifting roller table 3, a front material supporting frame 4, a front material pushing machine 5, a rear material supporting frame 6, a rear material pushing machine 7 and a side material discharging machine 8. The feeding, stripping and jacking discharging operations can be automatically completed under the control of a computer.

The forming main machine 1 comprises a base 1.1, a left upright post 1.2, a right upright post 1.3, an upper cross beam 1.4, a sliding block 1.5, a hydraulic cylinder I1.6, a workbench vertical plate 1.7 and a mechanical wedge block type convex workbench 1.8, wherein the base 1.1, the left upright post 1.2, the right upright post 1.3 and an upper cross beam 1.4 form a memorial archway type frame structure, the left upright post 1.2 and the right upright post 1.3 are oppositely arranged at the head and tail sides of the base 1.1, the upper cross beam 1.4 is fixedly arranged in an inner frame corresponding to the left upright post 1.2 and the right upright post 1.3, and the sliding block 1.5 is arranged in the inner frame of the left upright post 1.2 and the right upright post 1.3; the memorial archway type frame structure has the main functions of meeting the technological characteristics and performance requirements of a powerful forming machine and has the characteristics of low manufacturing cost, small installation space and simplicity in assembly and adjustment. An even number of at least six hydraulic cylinders I1.6 are uniformly distributed below an upper cross beam 1.4 vertically and downwards along the length direction, a plurality of workbench vertical plates 1.7 are horizontally arranged below the hydraulic cylinders I1.6, piston rods of every two hydraulic cylinders I1.6 are fixedly connected with the head end and the tail end of one workbench vertical plate 1.7, the hydraulic cylinders I1.6 respectively drive the plurality of workbench vertical plates 1.7 to synchronously or independently move along the vertical direction, and the workbench vertical plates 1.7 positioned at the head end and the tail end are respectively and fixedly connected with corresponding sliding blocks 1.5; the mechanical wedge type convex workbench 1.8 is arranged on the base 1.1 and is positioned below the workbench vertical plate 1.7;

the die 2 comprises an upper die 2.1 and a lower die 2.2, the upper die 2.1 is arranged below a vertical plate 1.7 of the workbench, the lower die 2.2 is arranged on a base 1.1, the upper die 2.1 and the lower die 2.2 are arranged oppositely, and the mechanical wedge type convex workbench 1.8 penetrates through the lower die 2.2 and extends into a forming cavity;

the side discharging machine 8 comprises a discharging machine slide rail 8.11, a side pushing discharging trolley 8.13 and a hydraulic follow-up jacking device 8.14, a slide seat 8.12 is arranged below the side pushing discharging trolley 8.13, the discharging machine slide rail 8.11 is arranged below the slide seat 8.12, and the slide seat 8.12 is matched with the discharging machine slide rail 8.11; the rotor of the motor II 8.4 is connected with the power input shaft of the speed reducer II 8.5, the power output shaft of the speed reducer II 8.5 is connected with the rotating shaft 8.6, the chain wheel I8.7 is installed on the rotating shaft 8.6, the chain wheel I8.7 drives the chain wheel II 8.8 and the chain wheel III 8.9 to rotate together through the chain 8.10, the side-push discharging trolley 8.13 is driven to move along the slide rail 8.11 in the moving process of the chain 8.10, and the bent stainless steel pipe is pushed out from the discharging position on one side of the forming main machine 1; the plurality of hydraulic follow-up jacking devices 8.14 are uniformly distributed in the lower die 2.2 along the length direction, each hydraulic follow-up jacking device 8.14 comprises a hydraulic cylinder III 8.14.1, a roller seat 8.14.2 and a discharging conveying roller 8.14.3, the discharging conveying roller 8.14.3 is mounted on the roller seat 8.14.2, the hydraulic cylinder III 8.14.1 drives the roller seat 8.14.2 to drive the discharging conveying roller 8.14.3 to vertically move upwards, a hydraulic jacking roller 8.15 is correspondingly arranged at the position of each hydraulic follow-up jacking device 8.14, six sets of hydraulic jacking rollers 8.15 are arranged in the embodiment, and the hydraulic jacking rollers 8.15 mainly have the function of avoiding the friction between the plate materials and the upper surface of the lower die 2.2 when the plate materials enter the die.

Furthermore, the mechanical wedge type convex working table 1.8 is a deflection compensation working table, and 31 groups of lifting wedges with inclined planes are installed in the mechanical wedge type convex working table 1.8. The numerical control system automatically calculates the adding amount of the convex according to the forming force to control the moving amount of the wedge block, thereby obtaining accurate deflection compensation on the whole length of the workbench.

Furthermore, the number of the hydraulic cylinders I1.6 is six, every two hydraulic cylinders I1.6 are arranged into a group, a grating ruler is arranged at the position of each group of hydraulic cylinders I1.6, the numerical control system controls the six hydraulic cylinders I1.6 to drive the three workbench vertical plates 1.7 to move by controlling the output flow of the three electro-hydraulic servo valves, the workbench vertical plates 1.7 simultaneously push the sliding blocks 1.5 at the two sides to move, and the sliding blocks 1.5 realize accurate positioning at the stroke end points.

Further, according to the thickness of the plate, a plurality of working platform vertical plates 1.7 are determined to synchronously or independently move along the vertical direction. For stainless steel plates with not too large wall thicknesses, the hydraulic cylinder I1.6 adopts a group control workbench vertical plate 1.7 to independently move, so that the requirements can be met, and energy can be saved; in addition, the hydraulic cylinders I1.6 of the six hydraulic cylinders can also realize synchronous motion at the same time, and the strong bending working requirement on the thick-wall pipe is met.

Furthermore, two sets of hydraulic follow-up material supporting mechanisms are arranged on the front side of the forming main machine 1, and are used for supporting the plate in the bending process and the return process, so that the plate is prevented from falling and being collided with mechanical parts such as material supporting and the like to damage the surface quality of the plate.

Further, the upper die 2.1 comprises a die head 2.1.1, an upper die base 2.1.2 and an upper die handle 2.1.3, the upper die base 2.1.2 is arranged below the upper die handle 2.1.3, the die head 2.1.1 is arranged on the upper die base 2.1.2, and the arc radius of the forming surface of the die head 2.1.1 is selected according to the diameter of the pipe blank to be formed; the lower die 2.2 comprises a lower die base 2.2.1, a lower die block 2.2.2 and an opening adjusting block 2.2.3, the lower die block 2.2.2 is installed on the lower die base 2.2.1, the opening adjusting block 2.2.3 is arranged on the inner side of the lower die block 2.2.2, the opening adjusting block 2.2.3 is composed of a plurality of backing plates with fixed thicknesses, and the number of the backing plates is increased or reduced according to the diameter of the tube blank to be formed.

Further, the lifting roller bed 3 comprises a hydraulic cylinder II 3.1, a sliding plate I3.2, a motor I3.3, a speed reducer I3.4 and twelve lifting power rollers 3.5, wherein the twelve lifting power rollers 3.5 are equally divided into four groups, the motor I3.3 drives the lifting power rollers 3.5 to rotate through the speed reducer I3.4, a piston rod of the hydraulic cylinder II 3.1 is hinged with the sliding plate I3.2, and the hydraulic cylinder II 3.1 drives the sliding plate I3.2 to drive the lifting power rollers 3.5 to move along the vertical direction.

Furthermore, the front material supporting frame 4 and the rear material supporting frame 6 adopt roller type structures, and the upper planes of the roller shafts on the front material supporting frame 4 and the rear material supporting frame 6 are 2mm higher than the upper plane of the lower die 2.2, so that the plates can be conveniently pushed in. If the upper plane of the roll shaft is lower than the upper plane of the lower die 2.2, the material supporting frame can be adjusted to the required height.

Furthermore, the front material pushing machines 5 are provided with two sets, each front material pushing machine 5 comprises a guide rail 5.1, a material pushing trolley 5.2 and a servo driving device, and the servo driving device drives the material pushing trolley 5.2 to slide along the guide rails 5.1 so as to push the plates into the lower die 2.2.

Further, the structure of the rear and rear pushers 7 is the same as that of the front pusher 5.

The working process of the device is as follows:

s1, feeding a pre-bent stainless steel plate material into a plate material pushing table from a feeding direction, wherein a lifting roller way 3 is positioned at an upper limit position and is positioned at the same horizontal plane with an output roller way of the previous process, when the stainless steel plate material is input into the lifting roller way, a lifting power roller 3.5 continues to push the stainless steel plate material to move forward until the stainless steel plate material completely falls into the lifting roller way 3, the lifting roller way 3 descends to a lower limit position at the moment, so that the plate material falls onto a front support material frame 4, the stainless steel plate material is pushed to the upper and lower die directions of a forming center by a front pusher 5, the accurate position of the plate material is determined by a positioning sensor positioned below the plate material pushing table, and the stainless steel plate material is bent by a forming host 1 after entering into a forming position;

s2, before bending and forming, the width of the lower die 2.2 is adjusted, the opening degree of the lower die 2.2 is determined according to the diameter of the formed pipe, and the pipe has a large diameter and a large opening degree; conversely, the diameter is small, and the opening degree is small. The opening degree is ensured by the opening adjusting block 2.2.3, and when the opening degree is required to be large, the backing plate of the opening adjusting block 2.2.3 is adjusted from the inner side of the die to the outer side; when the opening degree is required to be small, the backing plate of the opening adjusting block 2.2.3 is adjusted from the outer side to the inner side of the die, and the adjusting width of the opening degree is increased or decreased according to the thickness of the backing plate of the adjusting block. The die heads 2.1.1 have various specifications, and the die heads 2.1.1 with different specifications are mainly characterized in that the die heads 2.1.1 have different arc radiuses, and when a stainless steel pipe with a large diameter is pressed, the die head 2.1.1 with a larger arc radius is used; on the contrary, when pressing the stainless steel pipe with small diameter, the die head with smaller arc radius is used for 2.1.1.

S3, after the opening degrees of the upper die 2.1 die head 2.1.1 and the lower die 2.2 are determined, a grating ruler on the upper die 2.1 transmits signals to a control system, the control system determines whether the hydraulic cylinder I1.6 works independently or synchronously according to the thickness and the material of the stainless steel plate, and transmits the control signals to the hydraulic cylinder I1.6, so that the hydraulic cylinder I1.6 pushes the upper die handle 2.1.3 to drive the upper die base 2.1.2 and the die head 2.1.3 to move downwards, and the stainless steel plate is bent and formed, the thickness range of the generated stainless steel plate is 10-50 mm, and the maximum thickness can reach 50 mm.

In order to avoid friction between the stainless steel plate and the surface of the lower die 2.2 when the stainless steel plate enters the lower die 2.2 during forming and damage to the surface of the lower die 2.2, six hydraulic jacking rollers 8.15 and six sets of hydraulic follow-up jacking devices 8.14 are arranged in the lower die 2.2, the lower die is driven by a hydraulic cylinder III 8.14.1 below the lower die 2.2 during forming, so that a discharging conveying roller 8.14.3 on the lower die 2.2 is lowered, after the stainless steel plate is bent to a specified value, the upper die 2.1 is lifted up by a hydraulic cylinder I1.6, meanwhile, the hydraulic jacking rollers 8.15 are lifted up, the stainless steel plate is pushed to the next bending position by a material pushing device 5, and is positioned by a positioning sensor to carry out secondary bending, and the stainless steel plate is sequentially bent.

S4, when the stainless steel plate is pressed into a semicircle when seen from the side, the stainless steel plate is pushed to the other side of the forming main machine 1 by the material pushing device 5, the other side of the stainless steel plate is bent until the stainless steel plate is pressed into a circle with an opening on the upper surface when seen from the side, the discharging conveying roller 8.14.3 is lifted by the driving of the hydraulic cylinder III 8.14.1, the stainless steel pipe is lifted away from the lower die 2.2, discharging is carried out by the side discharging machine 8, the position of the sliding plate 8.2 is firstly adjusted by the adjusting bolt 8.1 during discharging, the position of the sliding plate 8.2 is determined by the tensioning degree of the chain 8.10, the sliding plate 8.2 is fixed by the fixing bolt 8.3 after the position is proper, and the chain wheel I8.7 is fixed on the sliding plate 8.2. After the position is adjusted properly, power is transmitted to a rotating shaft 8.6 through a speed reducer II 8.5 by a motor II 8.4, the rotating shaft 8.6 drives a chain wheel I8.7 to rotate, the chain 8.10 drives a chain wheel II 8.8 and a chain wheel III 8.9 to rotate together, and a side discharging trolley 8.13 is driven in the moving process of the chain 8.10 to push out the bent stainless steel pipe from the side surface through the relative movement of a sliding rail 8.11 and a sliding seat 8.12, so that the side discharging process is completed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.