阅读说明：本技术 多道次滚压式板材柔性翻边成形方法 (Multi-pass rolling type plate flexible flanging forming method ) 是由 程旋 赵亦希 李�杰 于 2021-09-02 设计创作，主要内容包括：一种多道次滚压式板材柔性翻边成形方法,通过翻边成形控制系统将滚轮移动至与原始板料的翻边线相切位置后以规划得到的滚轮绕切线旋转角度以及滚轮径向运动距离进行翻边件快速精确成形。本发明显著提高了带翻边钣金结构件的成形质量及成形效率,简单可行,生产效率高。(A multi-pass rolling type flexible flanging forming method for plates is characterized in that a flanging piece is quickly and accurately formed by planning the rotation angle of a tangent line of a roller and the radial movement distance of the roller after the roller is moved to a position tangent to a flanging line of an original plate through a flanging forming control system. The forming method obviously improves the forming quality and the forming efficiency of the sheet metal structural part with the flanging, and is simple, feasible and high in production efficiency.)

1. A multi-pass rolling type flexible flanging forming method for plates is characterized in that a flanging part is quickly and accurately formed by planning the rotation angle of a tangent line of a roller and the radial movement distance of the roller after the roller is moved to a position tangent to a flanging line of an original plate by a flanging forming control system;

the planning is as follows: with the lower flat of the original plateEstablishing a three-dimensional rectangular coordinate system by taking the surface as a reference surface and the circle center of the original plate as an origin, and obtaining the inner diameter R of the original plate according to the measurement₀Length L of the planar portion of the target flanged member₁Calculating the radius r of the transition fillet, the opening angle alpha of the flanging of the target flanging piece and the thickness d of the original plate to obtain the radius of the flanging line Then the displacement of the spinning wheel from the initial position to the radius of the flanging line is obtained by calculating according to the tangent length I from the tangent point to the axis of the spinning wheelAnd finally, according to the flanging opening angle alpha of the target flanging piece, setting n times of flanging forming, and calculating to obtain the rotation angle of the roller around the tangent line and the radial movement distance w of the roller during each time of forming.

2. The multi-pass rolling type flexible flanging forming method of plates according to claim 1, characterized in that the flanging forming control system comprises: turn-ups workstation, compress tightly gyro wheel mechanism, turn-ups gyro wheel mechanism, information receiving module, information contrast calculation module and motion control module, wherein: the target flanging piece is positioned on the flanging workbench, the pressing rotary wheel mechanism and the flanging roller mechanism are respectively positioned on the inner side and the outer side of the target flanging piece, the information receiving module transmits theoretical position information of the pressing rotary wheel mechanism and the flanging roller mechanism, the information comparison and calculation module obtains local adjustment displacement according to the position information, the motion control module respectively controls the pressing rotary wheel mechanism to press a plate and the flanging roller mechanism according to the local adjustment displacement information, multi-pass flanging forming of a piece to be formed is realized, and flanging steps are carried out in a circulating mode until a qualified flanging part is formed.

3. The multi-pass rolling type flexible flanging forming method of plates according to claim 2, characterized in that the pressing roller mechanism comprises: first machine joint mechanism and gyro wheel that links to each other with it, wherein: the spinning wheel is in contact with the inner side of the target flanging member.

4. The method of claim 3, wherein the radius of the roller is the same as the radius of the transition fillet of the target flanging member.

5. The multi-pass rolling type flexible flanging forming method for sheet materials according to claim 2, wherein the flanging roller mechanism comprises: second machine joint structure, third machine joint structure, gyro wheel and gyro wheel, wherein: the second machine joint structure is fixed with the roller in a screwed mode, the third machine joint structure is fixed with the roller in a screwed mode, and the roller are symmetrically distributed on two sides of the pressing rotary wheel mechanism.

6. The multi-pass rolling type flexible flanging forming method of sheet material according to claim 5, wherein the first to third mechanical joint mechanisms each comprise: displacement control sensor reduction gear shaft coupling and connecting rod.

7. The multi-pass rolling type flexible flanging forming method for the sheet material according to any one of claims 1 to 5, which is characterized by comprising the following steps of:

the method comprises the following steps that firstly, a target flanging piece is divided into a plane part and a flanging part according to the part characteristics of the target flanging piece; measuring to obtain the inner diameter R of the original plate₀1200mm, thickness d 2mm, radius r of the roller and the roller_wIs 24mm, the flange opening angle alpha of the target flange piece is 120 degrees, the radius r of the transition fillet is 10mm, and the length L of the plane part₁100mm and the length L2 of the flanging part is 32 mm; establishing a three-dimensional rectangular coordinate system by taking the lower plane of the original plate as a reference surface and the center of a circle of the original plate as an original point, and calculating to obtain the radius of the flanging line

Secondly, moving the roller and the roller to any position tangent to the flanging line of the original plate shown in the figure 3, measuring to obtain the length I of the tangent line from the tangent point to the axis of the rotating wheel, and calculating to obtain the displacement of the rotating wheel from the initial position to the radius of the flanging lineSetting 6-pass flanging forming according to the condition that the flanging opening angle alpha of the target flanging piece is 120 degrees; during each forming, the roller rotates 10 degrees around the tangent line, and the radial movement distance w between the roller and the roller during each forming is calculated₁～w₆Then, moving the roller to a position tangent to a flanging line of the original plate by a flanging forming control system, and then rapidly and accurately forming the flanging piece by planning the obtained rotation angle of the roller around the tangent line and the radial movement distance of the roller;

during each forming pass, the radial movement distance w between the roller and the roller₁～w₆The method specifically comprises the following steps:

the first time:

and (3) a second pass:

and a third step:

and a fourth pass:

and a fifth pass:

and a sixth pass:

Technical Field

The invention relates to a technology in the field of sheet metal part manufacturing, in particular to a multi-pass rolling type sheet material flexible flanging forming method.

Background

The sheet metal flanging component has wide application in the aerospace field. However, because of many varieties and few batches, the sheet metal flanging parts are mostly flanged in a manual hammering mode at present, and the production efficiency and the manufacturing quality are difficult to meet the continuously changing product requirements and the continuously accelerated production takt. Therefore, a new sheet metal flanging process is urgently to be developed to solve the manufacturing problem of the sheet metal flanging structural member at present.

Disclosure of Invention

The invention provides a multi-pass rolling type flexible flanging forming method for a sheet metal structural part, which is simple and feasible and has high production efficiency, and obviously improves the forming quality and forming efficiency of the sheet metal structural part with the flanging.

The invention is realized by the following technical scheme:

the invention relates to a multi-pass rolling type flexible flanging forming method for a plate, which is characterized in that a flanging piece is quickly and accurately formed by planning the rotation angle of a tangent line of a roller and the radial movement distance of the roller after the roller is moved to a position tangent to a flanging line of an original plate through a flanging forming control system.

The planning is as follows: establishing a three-dimensional rectangular coordinate system by taking the lower plane of the original plate as a reference surface and the circle center of the original plate as an original point, and obtaining the inner diameter R of the original plate according to measurement₀Length L of the planar portion of the target flanged member₁Calculating the radius r of the transition fillet, the opening angle alpha of the flanging of the target flanging piece and the thickness d of the original plate to obtain the radius of the flanging line Then the displacement of the rotary wheel from the initial position to the radius of the flanging line is obtained by calculating according to the tangent length l from the tangent point to the axis of the rotary wheelAnd finally, according to the flanging opening angle alpha of the target flanging piece, setting n times of flanging forming, and calculating to obtain the rotation angle of the roller around the tangent line and the radial movement distance w of the roller during each time of forming.

The flanging forming control system comprises: turn-ups workstation, compress tightly gyro wheel mechanism, turn-ups gyro wheel mechanism, information receiving module, information contrast calculation module and motion control module, wherein: the target flanging piece is positioned on the flanging workbench, the pressing rotary wheel mechanism and the flanging roller mechanism are respectively positioned on the inner side and the outer side of the target flanging piece, the information receiving module transmits theoretical position information of the pressing rotary wheel mechanism and the flanging roller mechanism, the information comparison and calculation module obtains local adjustment displacement according to the position information, the motion control module respectively controls the pressing rotary wheel mechanism to press a plate and the flanging roller mechanism according to the local adjustment displacement information, multi-pass flanging forming of a piece to be formed is realized, and flanging steps are carried out in a circulating mode until a qualified flanging part is formed.

Technical effects

The invention integrally solves the problems that the utilization rate of the dies in the prior flanging forming technology is low, each set of die is only suitable for forming a single flanging part with a flanging line radius and is difficult to form a flanging part with a larger arc opening angle;

compared with the prior art, the forming method can realize the forming of the flanging pieces with various flanging line radiuses by controlling the tangent position of the roller and the flanging line of the original plate; meanwhile, the springback compensation can be quickly realized by adjusting the rotation angle of the roller around the tangent line and the radial movement distance of the roller. Compared with the traditional method for manually flanging and forming a qualified part, the method is simple and feasible, only a few minutes are needed for completing a single part after process planning is completed, and the forming efficiency is greatly improved.

Drawings

FIG. 1 is a schematic diagram of an embodiment;

FIG. 2 is a view of a target trim piece;

FIG. 3 is a diagram of an original slab;

in the figure: the flanging device comprises a flanging workbench 1, a pressing rotary wheel mechanism 2, a flanging roller mechanism 3, a plane part 41, a flanging part 42, a first machine joint mechanism 21, a rotary wheel 22, a second machine joint structure 31, a third machine joint structure 32, a roller 33, a roller 34, a displacement control sensor 211, a speed reducer 212, a coupling 213, a connecting rod 214, a displacement control sensor 311, a speed reducer 312, a coupling 313, a connecting rod 314, a displacement control sensor 321, a speed reducer 322, a coupling 323, a connecting rod 324, a target flanging piece 4, a plane part 41 of the target flanging piece and a flanging part 42 of the target flanging piece.

Detailed Description

As shown in fig. 1, the present embodiment relates to a multi-pass rolling type flexible flanging forming system for sheet materials, which includes: turn-ups workstation 1, compress tightly gyro wheel mechanism 2, turn-ups gyro wheel mechanism 3, information receiving module, information contrast calculation module, motion control module, wherein: as shown in fig. 2, a target flanging member 4 is positioned on a flanging worktable 1, a pressing rotary wheel mechanism 2 and a flanging roller mechanism 3 are respectively positioned on the inner side and the outer side of the target flanging member 4, an information receiving module transmits theoretical position information of the pressing rotary wheel mechanism and the flanging roller mechanism, an information comparison and calculation module obtains local adjustment displacement according to the position information, and a motion control module controls the pressing rotary wheel mechanism to press a plate on one hand and controls the position and posture of the flanging roller mechanism on the other hand according to the local adjustment displacement information to realize multi-pass flanging forming of a to-be-formed member. The above process can be carried out in a circulating manner until a qualified flanged part is formed.

The pressing rotary wheel mechanism 2 comprises: a first machine articulation mechanism 21 and a swivel 22 connected thereto, wherein: the spinning wheel 22 is in contact with the inside of the target turnup 4.

The radius of the spinning wheel 22 is the same as the radius of the transition fillet of the target flanging member 4.

Turn-ups gyro wheel mechanism 3 include: a second machine joint structure 31, a third machine joint structure 32, a roller 33, and a roller 34, wherein: the second machine joint structure 31 is fixed with the roller 33 in a threaded manner, the third machine joint structure 32 is fixed with the roller 34 in a threaded manner, and the roller 33 and the roller 34 are symmetrically distributed on two sides of the pressing rotary wheel mechanism 2.

Each of the first to third machine joint mechanisms 21, 31, 32 includes: displacement control sensors 211, 311, 321, reducers 212, 312, 322, couplings 213, 313, 323, and links 214, 314, 324.

The reference point between the roller 33 and the roller 34 is the bottom circle center.

In the using process of the embodiment, according to the size of a plate and the actual forming requirement, the position relation between the pressing rotary wheel mechanism 2 and the flanging roller mechanism 3 is obtained through analysis, the poses of the pressing rotary wheel mechanism 2 and the flanging roller mechanism 3 are continuously adjusted, and forming force is applied to the part, to be flanged, of the plate to realize flexible flanging; the device has the advantages of simple operation, cooperative control among mechanisms, flexible structure and high degree of freedom, and can realize flexible flanging forming of original plates with different radiuses.

According to different forming requirements, the rotary wheels 22 with different sizes can be replaced, and the mechanism has good flexibility;

the invention obtains the inner diameter R of the original plate according to measurement₀Length L of the planar portion of the target flanged member₁Calculating the radius R of the transition fillet, the opening angle alpha of the flanging of the target flanging piece and the thickness d of the original plate to obtain the radius R of the flanging line₁And then the displacement of the rotary wheel from the initial position to the radius of the flanging line is calculated according to the tangent length from the tangent point to the axis of the rotary wheel, so that the position relation between the pressing rotary wheel mechanism 2 and the flanging roller mechanism 3 is obtained, the poses of the pressing rotary wheel mechanism 2 and the flanging roller mechanism 3 are continuously adjusted, multiple times of angle distribution and different positions of cut-in can be carried out on flanging pieces with different targets, and the flexible flanging forming of original plates with different radii is realized.

As shown in fig. 1, the present embodiment relates to a method for forming a flexible flange of a multi-pass rolling type plate by using the above apparatus, which includes:

firstly, dividing a target flanging piece 4 into a plane part 41 and a flanging part 42 according to the part characteristics of the target flanging piece; measuring to obtain the inner diameter R of the original plate₀1200mm, a thickness d of 2mm, a radius r of the roller 33 and the roller 34_wIs 24mm, the flange opening angle alpha of the target flange piece is 120 degrees, the radius r of the transition fillet is 10mm, and the length L of the plane part 41₁Is 100mm and the length L of the flanging part 42₂Is 32 mm; establishing a three-dimensional rectangular coordinate system by taking the lower plane of the original plate 5 as a reference plane and the circle center of the original plate 5 as an original point, and calculating to obtain the radius of the flanging line

Secondly, moving the roller 31 and the roller 33 to any positions tangent to the flanging line of the original plate 5 shown in FIG. 3, measuring the tangent length I from the tangent point to the axis of the rotary wheel 22 to 240mm, and calculating the displacement of the rotary wheel 22 from the initial position to the radius of the flanging lineSetting 6-pass flanging forming according to the condition that the flanging opening angle alpha of the target flanging piece is 120 degrees; during each forming pass, the roller 31 and the roller 33 rotate around the tangent line by 10 degrees, and the radial movement distance w between the roller 31 and the roller 33 during each forming pass is calculated₁～w₆And then, moving the roller to a position tangent to a flanging line of the original plate by a flanging forming control system, and then rapidly and accurately forming the flanging piece by planning the obtained rotation angle of the roller around the tangent line and the radial movement distance of the roller.

During each forming pass, the radial movement distance w between the roller 31 and the roller 33₁～w₆The method specifically comprises the following steps:

the first time:

and (3) a second pass:

and a third step:

and a fourth pass:

and a fifth pass:

and a sixth pass:

through specific experiments, the maximum transition fillet radius r of the flanging piece obtained by the method is 10.6mm, and the length L of the flanging part₂33.2 mm; the maximum transition fillet radius r of the flanging piece which is far lower than that of the flanging part obtained by the existing flanging forming technology is 13.6mm, and the length L of the flanging part₂34.9mm, a specific comparison is shown in the following table:

compared with the prior flanging technology, the time is 10 hours for one-time die repair, the die repair is required for multiple times, and different dies are required to be replaced aiming at different parts, so that the time is more time-consuming and labor-consuming, the forming time is only 0.3 hour, the dies are not required to be replaced according to the forming of different parts, the rapid forming of different parts can be realized by adjusting the rotation angle of the roller around the tangent line and the radial movement distance of the roller, and the forming efficiency is greatly improved; compared with the prior art that the maximum warping height of the flanging piece is 6.2mm and the maximum die-attaching clearance is 2.85mm, the method can ensure that the maximum transition fillet radius r of the flanging piece is 10.6mm and the length L of the flanging part is 10.6mm₂Is 33.2mm, and the forming quality is obviously improved.

The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.