CN114378176A

CN114378176A - Flexible electromagnetic forming device

Info

Publication number: CN114378176A
Application number: CN202011117088.7A
Authority: CN
Inventors: 黄亮; 谢冰鑫; 李建军; 苏红亮; 徐佳辉; 王泽宇
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2022-04-22
Anticipated expiration: 2040-10-19
Also published as: CN114378176B

Abstract

The invention belongs to the technical field related to plastic processing of metal materials, and discloses a flexible electromagnetic forming device, which comprises: the workbench is provided with a clamping groove; two first cross beams respectively arranged at two end parts of the base in the X-axis direction; the second cross beam is bridged on the two first cross beams and is in sliding connection with the first cross beams in the Y-axis direction; the main shaft is connected with the second cross beam in a sliding mode and is arranged along the Z-axis direction, a trapezoidal lead screw is arranged on the main shaft, and the trapezoidal lead screw drives the main shaft to move up and down; the universal coil connecting structure is arranged at the end part of the main shaft, a rotating base is arranged on the universal coil connecting structure, and the rotating base comprises a rotating boss and a locking ring which rotate around a z axis; the rotary boss is connected with the coil through a universal shaft or fixedly connected with the translation beam, and the lower surface of the translation beam is connected with at least one coil. The device can meet the forming requirement of large-scale and high-performance structural members.

Description

Flexible electromagnetic forming device

Technical Field

The invention belongs to the technical field related to plastic processing of metal materials, and particularly relates to a flexible electromagnetic forming device.

Background

The high-end manufacturing fields such as aerospace and the like are developed rapidly, the performance requirements of the manufacturing of components are increasingly strict, and the trend of large-scale and integration is obvious. The large-size aluminum alloy plate and tube thin-wall lightweight component accounts for more than 30% of the total weight of the aerospace carrier, and the precision forming and manufacturing of the component have important significance for promoting the development of aerospace industry in China. However, the aluminum alloy has poor room temperature forming performance, and is easy to have the defects of instability, wrinkling, tension fracture and the like in the stamping process, and the forming quality is difficult to accurately control. The larger size and more complex structure also present challenges to equipment tonnage and mold manufacturing. The forming quality can be improved by a plurality of solutions such as hydroforming, superplastic forming, warm forming and the like developed on the basis of the traditional stamping forming, but the forming quality is also accompanied by the problems of complex equipment structure, increased cost, prolonged processing period and the like. In addition, a large number of local features such as protrusions, holes flanging and punching are usually present on many large-sized shell parts, the forming of the local features is not only influenced by the forming performance of the material, but also limited by tooling structures such as dies, and the like, so that the product performance and quality control difficulty are increased due to the machining, welding and other modes, and the yield of the product is low.

The electromagnetic forming technology is that a discharge loop is formed by a capacitor and a control switch, instantaneous current generates a strong magnetic field through a working coil, and simultaneously, induced current and a magnetic field are generated in a metal workpiece, so that the workpiece is formed under the action of the magnetic field force. At present, the electromagnetic forming technology is researched and explored more in a laboratory, and is limited in industrial popularization and application, wherein most of the reasons are lack of adaptation and integration of the process and an automatic forming platform.

The moving path of the coil is often controlled in a manual mode in the electromagnetic incremental forming process of the existing large-scale component, the automation degree is insufficient, the production efficiency is low, the size of the component is not large at present due to the limitation of the size and the technology of a platform and the like, and the maximum diameter formed at present is about 1m by taking the bottom of a rocket fuel storage tank as an example. In addition, the movement of the forming coil only has three degrees of freedom in space, and a few coils can deflect at a certain angle, but the structural rigidity of the forming coil is often insufficient, and the problems of low process flexibility, insufficient forming force and the like exist in local characteristic forming of a large thick-wall component.

Disclosure of Invention

Aiming at the defects or the improvement requirements of the prior art, the invention provides a flexible electromagnetic forming device, which carries out rapid flexible accurate plastic forming of a strong magnetic field by matching an electromagnetic forming technology with a flexible forming technology, enlarges the application range of the electromagnetic forming technology in different component shapes and sizes, obviously improves the forming efficiency, solves a series of problems of limiting the industrial application of the electromagnetic forming technology, particularly realizes the requirement of the coil on multi-directional movement in space by three independent supporting shafts and universal shafts which are vertical to each other, can expand the number of the coils, and carries out accurate automatic control on the directions of the three supporting shafts and the rotation direction of the coils by a control system.

To achieve the above object, according to one aspect of the present invention, there is provided a flexible electromagnetic forming apparatus, comprising: the workbench is provided with a clamping groove, and the clamping groove is used for fixing a piece to be formed; two first beams respectively arranged at two ends of the workbench in the X-axis direction; the second cross beam is bridged on the two first cross beams and is in sliding connection with the first cross beams in the Y-axis direction; the main shaft is connected with the second cross beam in a sliding mode and is arranged along the Z-axis direction, a trapezoidal lead screw is arranged on the main shaft, and the trapezoidal lead screw drives the main shaft to move up and down; the universal coil connecting structure is arranged at the end part of the main shaft, a rotating base is arranged on the universal coil connecting structure, and the rotating base comprises a rotating boss and a locking ring which rotate around a z axis; the rotary boss is connected with the coils through a universal shaft or fixedly connected with the translation beam, and the lower surface of the translation beam is connected with at least one coil.

Preferably, a slide way is arranged on the translation beam, and the coil is connected with the slide way through a rotating base.

Preferably, a ball screw is arranged in the slide way, and the rotating base is driven by the ball screw to move along the slide way so as to drive the coil to move.

Preferably, the first cross beam is provided with a first guide rail and a first ball screw along the X-axis direction, and the second cross beam moves along the first guide rail through the first ball screw.

Preferably, a second guide rail and a second ball screw are arranged on the second cross beam along the Y-axis direction, and the main shaft moves along the second guide rail through the second ball screw.

Preferably, the device further comprises a plurality of servo motors for respectively controlling the movement of the first ball screw, the second ball screw and the trapezoidal screw.

Preferably, the control end is further included and is used for controlling the movement of the plurality of servo motors.

Preferably, the rotation angle of the universal shaft ranges from-75 degrees to +75 degrees, and the universal shaft further comprises an angle fixing screw for fixing the rotation angle of the universal shaft.

Preferably, the second beam is of a double-beam structure, and the two beams are symmetrically arranged on two sides of the main shaft.

Preferably, each of said cross-members has a width and height dimension of at least 250mm and is made of Q235; the outer diameter of the trapezoidal lead screw is at least 40 mm.

Generally, compared with the prior art, the flexible electromagnetic forming device provided by the invention has the following beneficial effects:

1. the coil is driven to move by the first cross beam, the second cross beam and the main shaft which are perpendicular to each other, so that the requirement of multidirectional movement of the coil is met, and the movement position is flexible;

2. the trapezoidal lead screw is arranged on the main shaft, the trapezoidal lead screw has a motion direction locking function, namely, the rotary motion can be converted into the linear motion, the linear motion cannot be converted into the rotary motion, when the trapezoidal lead screw stops rotating, the motion is locked, at the moment, the main shaft can bear a certain load and cannot deviate from the original position, therefore, strong reaction force generated when the coil discharges is not transmitted to the motor driving the trapezoidal lead screw to rotate, and the motor is protected;

3. the end part of the main shaft is provided with a universal coil connecting structure, a rotating base is arranged below the structure, a rotating boss is arranged on the rotating base, the rotating boss can rotate 360 degrees around a Z axis, the rotating base can be directly connected with a coil through a universal shaft, the rotating direction of the coil can be further expanded, the forming of any angle of a workpiece can be realized, the rotating base can meet the requirements of the thickness and the deformation of various components, the rotating base can also be connected with a translation cross beam, a plurality of coils are arranged below the translation cross beam, the modular expansion of a universal coil clamp connecting device is realized, the number of the coils is increased on a mounting plate according to the forming requirements, and the forming efficiency is further improved;

4. the ball screw drives the first cross beam, the second cross beam and the main shaft to move, so that the positioning precision is high, the abrasion is small, the service life is long, the friction force is small, the internal consumption driving force is small, the loads in the up-down and left-right directions can be borne simultaneously, the lubrication is simple and effective, and the maintenance is easy;

5. the movement of each ball screw is controlled by a plurality of servo motors, and the plurality of servo motors are controlled by a control end in a unified way, so that the electromagnetic forming machine is electromechanical integrated equipment integrating numerical control technology, logic control technology and mechanical manufacturing technology, is combined with a high-speed electromagnetic forming process, adopts numerical control system codes to accurately edit coil tracks, fully embodies the characteristics of flexibility, rapidness, precision, low manufacturing and the like of electromagnetic forming, and greatly improves the production efficiency;

6. the movement of the first cross beam, the second cross beam and the main shaft can be controlled by a servo motor and can also be manually controlled by a hand pulse generator, when a large-sized component is formed progressively, the track formation of a forming coil can be accurately controlled by programming, the progressive forming efficiency is obviously improved, and the local characteristic of a complex component can be manually and accurately positioned when formed, so that the movement of the first cross beam, the second cross beam and the main shaft can realize the movement of a 0.01mm input unit, the working accuracy, the positioning accuracy, the accuracy retentivity and the working stability are high, the accurate forming can be realized, and the high accuracy requirement of aerospace components can be particularly met;

7. the size of the workbench is not limited, workpieces with various sizes below 4200mm in diameter can be installed, the forming requirement of a large component is met, a lower die is only required to be installed and fixed on a clamping groove of a fixed-load workbench during forming, accurate and efficient positioning of a forming area is achieved through a three-axis system and a universal coil structure, a flexible coil replaces a traditional male die to achieve non-contact high-speed forming, and the surface quality of the component can be well guaranteed;

8. the second beam and the trapezoidal lead screw which adopt the double-beam structure can bear the coil discharge reaction force of 10T, so that a large-size high-strength component can be formed.

Drawings

FIG. 1 schematically illustrates a block diagram of a flexible electromagnetic forming device according to an embodiment of the present disclosure;

FIG. 2 schematically illustrates a block diagram of a gimbal coil connection structure that is a monocoil, in accordance with an embodiment of the present disclosure;

FIG. 3 schematically illustrates a structural schematic of a rotating base according to an embodiment of the present disclosure;

FIG. 4 schematically illustrates a block diagram of a gimbal coil connection structure that is a dual coil in accordance with an embodiment of the present disclosure;

fig. 5A schematically illustrates a motion trajectory diagram of a spindle according to embodiment 1 of the present disclosure;

FIG. 5B schematically shows a block diagram at the start of forming according to embodiment 1 of the present disclosure;

FIG. 5C schematically shows a block diagram of a forming process according to embodiment 1 of the present disclosure;

FIG. 5D schematically shows a block diagram at the end of forming according to embodiment 1 of the present disclosure;

figure 6 schematically illustrates a forming schematic according to embodiment 2 of the present disclosure;

figure 7 schematically illustrates a forming schematic according to embodiment 3 of the present disclosure.

The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:

1-workbench, 2-clamping groove, 3-upright column, 4-first beam, 5-second beam, 6-main shaft, 7-universal coil connecting structure, 91-first ball screw, 101-first guide rail, 81, 82, 83-servo motor, 71-rotating base, 71 a-fixed ring, 71 b-locking ring, 71 c-rotating boss, 72-translation beam, 73-universal shaft, 12-coil, a-mould, b-workpiece and c-edge pressing device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, the present invention provides a flexible electromagnetic forming apparatus, which includes a worktable, a first beam, a second beam, a main shaft, a universal coil connecting structure, and a coil. The whole device adopts a viaduct type gantry frame.

The workbench 1 is used for bearing and supporting a to-be-formed piece, a first cross beam, a second cross beam, a main shaft and other equipment. A clamping groove 2 is formed in the working table surface, the clamping groove 2 is used for fixing a to-be-formed piece, and the clamping groove 2 is preferably a T-shaped groove in shape. For convenience of description, as shown in fig. 1, the width direction of the table 1 is set as the X-axis direction, the length direction of the table 1 is set as the Y-axis direction, and the direction perpendicular to the table 1 is set as the Z-axis direction.

The number of the first beams 4 is two, and the two first beams are disposed at two ends of the workbench 1. as shown in fig. 1, four columns 3 are disposed at an upper portion of the workbench 1 for supporting the first beams 4, and the first beams 4 are parallel to the X-axis direction. The first beam 4 is provided with a first guide rail 101 for positioning and carrying the second beam 5 along the X-axis direction and a first ball screw 91 parallel to the first guide rail 101. The first ball screw 91 of each first beam 4 is driven by a servo motor 81, and the servo motor 81 is preferably provided at the end of the corresponding first beam 4. The second cross beam 5 is bridged over the two first cross beams 4 and is connected with the first ball screw 91 through a nut, so that the servo motor 81 drives the first ball screw 91 to rotate, and the second cross beam 5 moves under the driving of the first ball screw 91.

The second cross beam 5 is a parallel double-cross-beam structure, the width and height of each cross beam are at least 250mm, preferably 250-350 mm, the length is at least 4000mm, preferably 4000 mm-4500 mm, the structure can bear larger processing reaction force, the deformation of the cross beam of the machine frame during processing is reduced, the performance of the equipment is reliable, the stability is high, and the high precision is guaranteed. Each beam is provided with a second ball screw and a second guide rail, each second ball screw is controlled by a servo motor 82, and the second ball screws are connected with the main shaft 6 along the Z-axis direction through nuts, so that the main shaft 6 can move under the driving of the second ball screws. The main shaft 6 is arranged in the middle of the double-beam structure of the second beam 5, so that the two beams are symmetrically arranged relative to the main shaft 6. The material of the double beam structure is preferably high strength structural steel Q235.

The main shaft 6 is arranged along the Z axis, a trapezoidal lead screw is arranged in the main shaft 6, the outer diameter of the trapezoidal lead screw is at least 40mm, the preferred length is 40-70 mm, the trapezoidal lead screw has a self-locking function, the trapezoidal lead screw can only convert rotary motion into linear motion, the linear motion can not be converted into rotary motion, the servo motor 83 drives the trapezoidal lead screw, the trapezoidal lead screw drives the main shaft to move up and down, when the servo motor 83 stops rotating, the lead screw is self-locked, further the main shaft can bear certain load, the original position can not be deviated, therefore, strong reaction force generated when a coil discharges can not be transmitted to the motor, and the motor protection effect is achieved.

The width of the second cross beam 5 on the workbench 1 is larger than 4m, a workpiece with the size of more than 4m can be realized, the forming requirement of a large-scale component can be realized, meanwhile, the sectional area of the cross beam is larger than 250mm, high-strength Q235 structural steel is adopted, the outer diameter of the trapezoidal lead screw is larger than or equal to 40mm, the bearing strength is high, and the load of the workbench 1 is as high as 10T/m²The thickness of the formable workpiece is 1-10 mm, and the formable workpiece can meet the requirementsThe forming requirement of large members.

The lower end of the main shaft 6, i.e. the end facing the table 1, is provided with a universal coil connection structure 7. As shown in fig. 2, the gimbal coil connecting structure 7 includes a rotating base 71, and as shown in fig. 3, the rotating base 71 includes a rotating boss 71c, a locking ring 71b, and a fixing ring 71 a. The rotary boss 71c can make 360 ° rotation about the z-axis. The locking ring 71b is disposed on the periphery of the rotary boss 71c, and plays a locking role, when the rotary boss 71c is adjusted to a proper angle, the locking ring 71b is locked, and the rotary boss 71c is rigidly connected with the fixing ring 71a, so that the position of the rotary boss 71c is fixed. The fixing ring 71a is used for fixedly connecting with an external device. As shown in fig. 2, the rotating boss 71c may be directly connected to the coil 12 through a cardan shaft 73, the cardan shaft 73 preferably rotates at an angle of-75 ° to +75 °, and the cardan shaft 73 further includes an angle fixing screw that fixes the coil 12 when the coil 12 is wound at a fixed angle. As shown in fig. 4, the rotating boss 71c may further be connected to a translation beam 72, and a plurality of rotating bases 71 as described above may be further disposed under the translation beam 72, and the rotating bases 71 are connected to the coils 12, so that the number of the coils 12 may be expanded. Specifically, be equipped with the slide on translation crossbeam 72, one coil 12 through a rotating base 71 with the slide is connected, be equipped with ball in the slide, rotating base 71 is in ball's drive is followed the slide motion and then is driven coil 12 moves. With the above design, a single coil form as shown in fig. 2 and a multi-coil form as shown in fig. 4 can be realized. The slide way is also provided with a fixing screw, and when the slide way moves to a designated position, the rotating base 71 can be fixed at the designated position of the translation cross beam 72 by tightening the fixing screw. Similarly, the control of the ball screw in the slide and the control of the rotation angle of the universal shaft 73 can be automatic control or manual control.

The device still includes the control end, and this control end can carry out the operation orbit that accurate programming realized first ball 91, second ball, trapezoidal screw etc. and then realizes the automatic operation of first ball 91, second ball, trapezoidal screw etc.. The control end further comprises a hand-operated pulse generator, so that manual control of the first ball screw 91, the second ball screw, the trapezoidal screw and the like is achieved. The invention can realize that when a large member is formed progressively, the track formation of a forming coil can be accurately controlled by programming, the progressive forming efficiency is obviously improved, and the local characteristic of a complex member can be manually and accurately positioned when formed, so that the movement of the first beam, the second beam and the main shaft can realize the movement of a 0.01mm input unit, the working precision, the positioning precision, the precision retentivity and the working stability are high, the precise forming can be realized, and the high-precision requirement of aerospace members can be particularly met.

In the working process, a forming lower die a is placed on a workbench 1, the die a is connected with the workbench 1 through bolts on a clamping groove 2 so as to fix the die a, an original workpiece b is placed on the die a, and the workpiece is fixed through a blank holder c; assembling the coil 12 on the gimbal coil connection structure 7; the control end is provided with the motion tracks of the first beam 4, the second beam 5 and the main shaft 6, the coil 12 is moved to a position where a workpiece b is to be formed, the locking ring 71b is locked after the rotating base 71 of the universal coil connecting structure 7 reaches a required direction, the angle of the coil 12 is rotated, and the angle adjusting screw is used for positioning and locking after the coil 12 reaches the required angle. And controlling the electromagnetic forming machine, wherein the capacitor bank is charged and then is instantaneously discharged through the coil 12, and the workpiece b is subjected to high-speed plastic deformation under the action of strong pulse magnetic field force, so that the formed workpiece c can be obtained.

Example 1

In the embodiment, the piece to be formed is a propellant tank of a carrier rocket, the propellant tank of the carrier rocket is a key part in a rocket body structure, the oval tank bottom is a typical large-scale complex curved surface member, and due to the limitations of coil size, structural strength, equipment energy and the like, the large-scale plate is difficult to form in one-time discharge by the traditional electromagnetic forming method, so that the electromagnetic flexible incremental forming technology is adopted.

The electromagnetic flexible incremental forming technology adopts the discharge coil to replace a rigid tool head of a single-point incremental forming device, gradually moves to each local position of a large plate according to a certain three-dimensional space track under the control of a computer, generates electromagnetic force through coil discharge, enables the plate in the area to deform, and finally obtains a deformed integral component.

The original material used in the embodiment is aluminum alloy, the diameter is 3000mm, the thickness is 5mm, an ellipsoidal large-scale complex curved surface component needs to be formed, the defects of instability, wrinkling, tension fracture and the like easily occur to a workpiece in the traditional stamping forming process, the quality is difficult to control accurately, and the existing equipment tonnage and die manufacturing technology cannot form a plate with the large size and the thickness. The existing large-scale component electromagnetic incremental forming usually adopts a manual mode to control a coil moving path, has insufficient automation degree and lower production efficiency, and cannot form a component with the diameter of 3000mm due to the limitations of platform size, technology and the like. In addition, the movement of the forming coil only has three degrees of freedom in space, and a few coils can deflect at a certain angle, but the structural rigidity of the forming coil is often insufficient, a plate with the thickness of 5mm cannot be formed, the process flexibility is low, and the forming force is insufficient. The flexible electromagnetic forming device is adopted to carry out electromagnetic flexible incremental forming on the workpiece, the moving track of the main shaft 6 is shown in figures 5A-5C, the accurate control of the formed track is realized by programming the output control end, the discharging energy of the electromagnetic forming device is 53kJ, the discharging voltage is 10kV, the discharging energy in die attaching is 19kJ, and the die attaching discharging voltage is 6kV, as shown in figure 5D. The gaps between the formed component and the die are all between 0.1 mm and 0.3mm, the wall thickness is 4.50 +/-0.05 mm, the wall thickness is uniformly distributed, the use requirement is met, the surface quality is good, and the defects of microcracks, instability, wrinkling, tension cracking and the like are avoided.

Example 2

A large number of local features such as bulges, holes flanging, punching and the like are usually arranged on a plurality of large shell parts of an aerospace vehicle, the forming of the local features is not only influenced by the forming performance of materials, but also limited by tool structures such as molds and the like, the product performance and quality control difficulty is increased due to the machining, welding and other modes, and the yield of products is low. The embodiment adopts the flexible electromagnetic forming device in this application to make the local slant hole flanging scene of large-scale casing part.

The original material used in the embodiment is aluminum alloy, and the raw material is formed into an ellipsoid curved surface shell component, the radius of the long axis is 1000mm, the radius of the short axis is 700mm, the thickness is 8mm, and a plurality of flanging holes are required to be formed on the part of the inclined curved surface. The flexible electromagnetic forming device is adopted to carry out local electromagnetic forming on the workpiece. Local electromagnetic forming is shown in fig. 6, an ellipsoid curved surface shell component is placed on a workbench 1, a workpiece is fixed through 4 hydraulic blank holder oil cylinders, two lower dies a are placed in a characteristic region to be formed, a die seat a is connected with the workbench through bolts, and the positions of the dies are fixed. The flexible electromagnetic forming device adopts a multi-coil 12 mode, automatic forming is carried out according to a preset track, local accurate positioning is carried out by combining a manual mode, at the moment, the discharge energy of the flexible electromagnetic forming device is 12kJ, and the discharge voltage is 15 kV. The formed component flanging straight wall area is completely coated with the film, the die coating gaps are all between 0.1 mm and 0.2mm, the wall thickness is 5.60 +/-0.03 mm, the wall thickness is uniformly distributed, the fillet is not excessively thinned, the use requirement is met, the surface quality is good, and the defects of microcracks, burrs, tearing and the like are avoided.

Example 3

The flexible electromagnetic forming device in the application can also be used in a multi-point die, the multi-point die is utilized to disperse the traditional integral die into a series of regularly-ordered and height-adjustable basic bodies, and curved surfaces with different shapes and complex sizes can be processed only by adjusting the basic bodies.

The starting material used in this example was an aluminum alloy. Rectangular sheet material with the size of 2000mm multiplied by 1000mm and the thickness of 3mm needs to be processed into a complex hyperboloid member.

The processing process comprises the following steps: as shown in fig. 7, firstly, the sheet material is clamped in a vertically movable edge pressing device, one or more coils 12 discharge successively along the top profile of a multi-point die with complex curved surface characteristics in a preset processing track, the sheet material to be formed is attached to the top profile under the action of electromagnetic force until the sheet material is completely attached to the top profile, different profile characteristics are formed by adjusting the height of a basic body, and electromagnetic incremental forming of different profiles is performed until electromagnetic incremental flexible composite forming of the whole workpiece is completed.

The main shaft space moving track is designed according to the required shape of the plate, the main shaft space moving track is input into a numerical control system in a programming mode, the accurate control of the stroke track is achieved, the discharging energy of the electromagnetic forming equipment is 34kJ, and the discharging voltage is 8 kV. After forming, the die-attaching gaps are all between 0.1 mm and 0.2mm, the wall thickness is 3 +/-0.02 mm, the wall thickness is uniformly distributed, the surface is smooth and continuous, the quality is good, the defects of micro-cracks, instability, wrinkling, tension fracture and the like are avoided, and the use requirements are met.

To sum up, this application can make the coil in the work of diversified multi-angle through setting up the independent back shaft of three direction and cardan shaft to the number of coil is expanded, realizes the flexibility and the efficiency of coil work, can resist powerful reaction force when the coil discharges through setting up two crossbeams of high strength structure and trapezoidal lead screw structure etc. realizes the preparation requirement to the maximization component.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A flexible electromagnetic forming apparatus, comprising:

the device comprises a workbench (1), wherein a clamping groove (2) is formed in the workbench (1), and the clamping groove (2) is used for fixing a piece to be formed;

two first cross beams (4) which are respectively arranged at two end parts of the workbench (1) and are along the X-axis direction;

a second beam (5) which is bridged on the first beam (4) and is connected with the first beam (4) in a sliding manner in the Y-axis direction;

the main shaft (6) is connected with the second cross beam (5) in a sliding mode and is arranged along the Z-axis direction, a trapezoidal lead screw is arranged on the main shaft (6), and the trapezoidal lead screw drives the main shaft (6) to move along the Z axis;

the universal coil connecting structure (7) is arranged at the end part of the main shaft (6), a rotating base (71) is arranged on the universal coil connecting structure (7), and the rotating base (71) comprises a rotating boss (71c) and a locking ring (71b) which rotate around the Z axis; the rotating boss (71c) is connected with the coil (12) through a cardan shaft (73) or fixedly connected with a translation cross beam (72), and the lower surface of the translation cross beam (72) is connected with at least one coil (12).

2. The flexible electromagnetic forming apparatus according to claim 1, wherein the translating beam (72) is provided with a slideway, and the coil (12) is connected with the slideway through a rotating base (71).

3. The flexible electromagnetic forming device according to claim 2, wherein a ball screw is arranged in the slideway, and the rotating base (71) is driven by the ball screw to move along the slideway so as to drive the coil (12) to move.

4. The flexible electromagnetic forming apparatus according to claim 1, wherein the first beam (4) is provided with a first guide rail (101) and a first ball screw (91), and the second beam (5) is moved along the first guide rail (101) by the first ball screw (91).

5. Flexible electromagnetic forming device according to claim 4, characterized in that the second cross beam (5) is provided with a second guide rail and a second ball screw, by means of which the main shaft (6) is moved along the second guide rail.

6. The flexible electromagnetic forming device according to claim 5, further comprising a plurality of servo motors for controlling the movements of the first ball screw (91), the second ball screw and the trapezoidal screw, respectively.

7. The flexible electromagnetic forming device of claim 6, further comprising a control end for controlling the movement of the plurality of servo motors.

8. The flexible electromagnetic forming apparatus according to claim 1, wherein the rotation angle of the cardan shaft (73) is-75 ° - +75 °, and the cardan shaft (73) further comprises an angle fixing screw for fixing the rotation angle of the cardan shaft (73).

9. The flexible electromagnetic forming device according to claim 1, wherein the second beam (5) is a double beam structure, and the two beams are symmetrically arranged on two sides of the main shaft (6).

10. The flexible electromagnetic forming device of claim 9, wherein each of the cross-beams has a width and a height dimension of at least 250mm and is made of Q235; the outer diameter of the trapezoidal lead screw is at least 40 mm.