CN115283559B

CN115283559B - Edge rolling method

Info

Publication number: CN115283559B
Application number: CN202210873500.0A
Authority: CN
Inventors: 刘殿福; 司磊; 张东强; 董茂; 刘旭光; 李寅; 袁占江; 施朋朋; 王佳莹; 杨侠; 胡国雨; 李俊峰
Original assignee: Exquisite Automotive Systems Co Ltd
Current assignee: Exquisite Automotive Systems Co Ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2024-05-31
Anticipated expiration: 2042-07-22
Also published as: CN115283559A

Abstract

The invention provides a binding method which comprises a pre-pressing process, a plurality of re-pressing processes and a final pressing process which are sequentially arranged. Each procedure adopts two pressing wheels rolling along the first flanging to roll the first flanging, wherein the first flanging comprises an overlapping part and a part to be bent which is higher than the second flanging; in the pre-pressing procedure, the two pressing wheels clamp the part to be bent, so that the part to be bent bends an included angle which forms a pre-pressing angle with the overlapped part; in the re-pressing and final-pressing processes, the two pressing wheels are positioned on one side of the first flanging, which is opposite to the second flanging, and respectively press against the overlapped part and the part to be bent so as to press the part to be bent to gradually bend and finally press the part to be bent on the second flanging. According to the flanging method, the prepressing process and the multiple re-pressing processes mean that the bending part to be bent is rolled successively in multiple processes, deformation generated when the bending amount of one time is large can be restrained, and meanwhile, the first flanging is rolled by the two pressing surfaces in a matched mode, so that the flanging and flanging processing molding effect is improved.

Description

Edge rolling method

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to a binding method.

Background

With the development of the automobile industry, the production efficiency of automobiles is required to be higher and higher, and an automobile top cover is one of the components of the automobiles and is usually fixedly arranged at the top of an automobile body, so that the functions of sealing a cab and protecting passengers in the automobile are achieved.

For the edging of automobile roof, a edging process is generally adopted. Specifically, hemming is one type of hemming, and a product part is finished to finish final hemming, generally through two processes, namely pre-hemming and final hemming. The edging is to use rollers (generally driven by a robot arm) to act on the inner flange of the skylight, gradually fold the inner and outer plates through a plurality of rounds (generally 4 to 6 times) by using plastic deformation of metal, tightly connect the inner and outer plates together through the effect of steel plate flanging glue in the inner and outer flanging areas, and realize the assembly purpose. Compared with a die flanging mode, the die flanging mode has the advantages of being flexible, smaller in pressure and capable of controlling quality point by point through a robot program.

The automobile top cover belongs to 180-degree edge wrapping, the standard robot edge wrapping method generally comprises the steps of completing edge wrapping in six orders, completing edge wrapping of 30 degrees in each order, and therefore, the production takt is long, in order to meet the production process requirement of high takt, stations can only be added for realizing, the production preparation period is long, and quality optimization is difficult.

Disclosure of Invention

In view of the above, the present invention aims to provide a trimming method to facilitate improving the forming effect of the flanging trimming process.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

The edge rolling method comprises the steps of bending a first flanging at the edge part of a first plate in a rolling manner, overlapping a second flanging at the edge part of a second plate on the inner side of the first flanging, and wrapping the bent first flanging on the second flanging; the edge rolling method comprises a pre-pressing process, a plurality of re-pressing processes and a final-pressing process which are sequentially arranged, wherein each process adopts two pressing wheels rolling along the first flanging to roll the first flanging; the first flanging comprises an overlapping part which is overlapped with the second flanging and a part to be bent, which is higher than the second flanging; in the pre-pressing procedure, the two pressing wheels clamp the to-be-bent part, so that the to-be-bent part bends towards one side of the second flanging and forms an included angle of a pre-pressing angle with the overlapped part; in the re-pressing step and the final-pressing step, the two pressing wheels are both positioned on one side of the first flanging opposite to the second flanging and respectively abutted against the overlapped part and the to-be-bent part so as to abut against the to-be-bent part to gradually bend and finally press the second flanging.

Further, the pre-pressing angle is 140-160 degrees.

Further, the re-pressing step includes a first re-pressing step and a second re-pressing step that are sequentially performed, and in the two re-pressing steps, the re-pressing angle between the portion to be bent and the overlapping portion that is pressed and bent is sequentially reduced.

Further, the re-pressing angle in the first re-pressing step is 80-100 degrees, and the re-pressing angle in the second re-pressing step is 20-40 degrees.

Further, in the final pressing step, the portion to be bent, which is pressed and bent, is pressed against the second flange, and a final pressing angle between the portion to be bent and the overlapping portion is 0 °.

Further, before the pre-pressing step, the first plate and the second plate which are overlapped together are first fixed on the top table surface of the tire mold, the surface of the first flanging opposite to the second flanging is aligned with the side reference surface of the tire mold, and the pressing wheel which is pressed against the overlapped part is simultaneously pressed against the side reference surface.

Further, the two pinch rollers are respectively a roller with a first pinch surface and a base roller with a second pinch surface; in the pre-pressing process, the base wheel is positioned at one side of the first flanging, which is opposite to the second flanging, and the first pressing surface and the second pressing surface clamp the part to be bent; in the back pressing step and the final pressing step, the second pressing surface is pressed against the overlapping portion.

Further, a third pressing surface rolled on the overlapping part is further arranged on the base wheel in the pre-pressing procedure.

Further, before rolling in each process, the base wheel approaches the first flanging from a position spaced by a certain distance from the first flanging and is abutted against the first flanging.

Further, in the re-pressing step and the final-pressing step, the roller is located above the portion to be bent, and before rolling, the roller approaches the portion to be bent from a position spaced from the portion to be bent by a certain distance, and abuts against the portion to be bent.

According to the edge rolling method, the first flanging of the first plate can be wrapped on the second flanging of the second plate by utilizing the pre-pressing process and the multiple re-pressing processes, the pre-pressing process and the multiple re-pressing processes mean that the bending parts to be rolled are sequentially processed through multiple processes, deformation generated when the bending quantity of one time is large can be restrained, and meanwhile, the first flanging is rolled through the two pressing surfaces in a matched mode, so that the forming effect of flanging rolling is improved.

In addition, compared with the prior art, the four working procedures consisting of the pre-pressing working procedure and the three re-pressing working procedures can save working procedures required by edging, and can obviously improve the production efficiency of edging forming.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention, wherein the words of front and back, top and bottom, etc. are used to indicate relative position and are not intended to limit the invention unduly. In the drawings:

FIG. 1 is a product diagram of a piping method according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an unwrapped product in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a product according to an embodiment of the present invention in a wrapped state;

FIG. 4 is a cut-in state diagram of a pre-compaction process of the piping method according to an embodiment of the present invention;

FIG. 5 is a diagram showing a state of completion of the pre-pressing step of the binding method according to the embodiment of the present invention;

FIG. 6 is a cut-in state diagram of a first back pressure process of the trimming method according to the embodiment of the present invention;

FIG. 7 is a diagram showing a state of completion of a first back pressure process of the trimming method according to the embodiment of the present invention;

FIG. 8 is a cut-in state diagram of a second back pressure process of the piping method according to an embodiment of the present invention;

FIG. 9 is a diagram showing a second back pressure process of the trimming method according to the embodiment of the present invention;

FIG. 10 is a cut-in state diagram of the final press process of the trimming method according to the embodiment of the present invention;

FIG. 11 is a diagram illustrating a final press process of the trimming method according to the embodiment of the present invention;

fig. 12 is a diagram showing a completed state of a final pressing process of the trimming method according to the embodiment of the present invention.

Reference numerals illustrate:

1. A first plate; 10. a first flanging; 100. an overlapping portion; 101. a portion to be bent; 2. a second plate; 20. a second flanging; 30. a first roller; 300. a first pressing surface; 301. a first rotating seat; 302. a first scroll wheel; 31. a first base wheel; 310. a second pressing surface; 311. a third pressing surface; 32. a second roller; 320. a second rotating seat; 321. a second scroll wheel; 33. a third roller; 330. a third rotating seat; 331. a third scroll wheel; 34. a fourth roller; 340. a fourth rotating seat; 341. a fourth scroll wheel; 35. a second base wheel; 7. a moulding bed; 70. a top mesa; 71. a side datum plane.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the present invention, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in combination with specific cases.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

The present embodiment relates to a hemming method, and more particularly, to a hemming method, as shown in fig. 1 to 3, in which a first flange 10 at an edge portion of a first plate 1 is bent in a rolling manner, and a second flange 20 at an edge portion of a second plate 2 is overlapped on an inner side of the first flange 10, and the bent first flange 10 is wrapped on the second flange 20. In the overall design, the edge rolling method comprises a pre-pressing process, a plurality of re-pressing processes and a final-pressing process which are sequentially arranged, and each process adopts two pressing wheels rolling along the first flanging 10 to roll the first flanging 10.

Wherein the first flange 10 includes an overlapping portion 100 overlapping the second flange 20, and a portion to be bent 101 higher than the second flange 20. As will be described with reference to fig. 2, an included angle is formed between the first flange 10 and the first plate 1, and the second plate 2 is disposed in the area of the included angle, and since the second plate 2 has the second flange 20, as shown in fig. 2, the first flange 10 and the second flange 20 on the second plate 2 are partially overlapped, that is, the above-mentioned overlapped portion 100, and the length of the first flange 10 is greater than the length of the second flange 20, and the remaining length of the first flange 10 relative to the second flange 20 is the above-mentioned portion 101 to be bent.

As shown in fig. 4 and 5, in the pre-pressing step, the two pressing wheels clamp the portion to be bent 101, so that the portion to be bent 101 is bent towards the second flanging side 20, and an included angle between the portion to be bent 101 and the overlapping portion 100 is formed by pre-pressing angles.

Specifically, the two pressing wheels are a roller with a first pressing surface 300 and a base wheel with a second pressing surface 310 respectively. In the pre-pressing process, the base wheel is positioned at one side of the first flanging 10 opposite to the second flanging 20, and the first pressing surface 300 and the second pressing surface 310 clamp the to-be-bent part 101; in the back pressing step and the final pressing step, the second pressing surface 310 is pressed against the overlapping portion 100.

In the pre-pressing process, the pinch roller includes a pivotable first base wheel 31 that can be driven to move and a pivotable first roller 30 that can be driven to move. Accordingly, the pressing surfaces include a first pressing surface 300 on the first roller 30 as in fig. 4, and a second pressing surface 310 on the first base roller 31. The first base wheel 31 is located at a side of the first flange 10 facing away from the second flange 20, and a third pressing surface 311 rolled on the overlapping portion 100 is further disposed on the first base wheel 31. Here, the first base wheel 31 is horizontally arranged, and the first roller 30 is inclined with respect to the first base wheel 31.

In addition, the trimming method of the present embodiment further includes a tire film as a placement reference of the first plate 1 and the second plate 2 to facilitate positioning and trimming of the first plate 1 and the second plate 2. Specifically, the overall tire membrane is rectangular, the vertical surface of the tire membrane serves as a side reference surface 71 of the tire membrane, and the top of the tire membrane is provided with an inclined top table 70 so as to be attached to the outer contour of the first plate 1, so that the first flanging 10 is in a vertical state for subsequent processing.

In the present embodiment, it is preferable that the first base wheel 31 has a cylindrical shape, the second press surface 310 is specifically a cylindrical outer wall of the first base wheel 31, that is, the second press surface 310 is a vertical surface, and the third press surface 311 is an inclined surface formed on the first base wheel 31, and it is preferable that the inclination angle of the third press surface 311 with respect to the vertical horizontal line is 30 °. Of course, the first base wheel 31 may be rectangular, and when the first base wheel 31 is rectangular, the first base wheel 31 does not rotate, but in order to ensure the edging effect and prevent the first base wheel 31 from wearing the outer wall of the first plate 1, the first base wheel 31 in this embodiment is selected to be cylindrical.

The first roller 30 has a first rotating seat 301 having a cylindrical shape capable of rotating along its own center line, and a first rolling wheel 302 formed at an end of the first rotating seat 301. The first rolling wheel 302 is made into a butterfly shape, so that the first pressing surface 300 is a plane inclined relative to the outer wall of the first rotating seat 301, the first pressing surface 300 is disposed inclined relative to the vertical horizontal line, and the inclination angle of the first pressing surface 300 is preferably 30 °. In addition, the first pressing surface 300 and the third pressing surface 311 can be matched with each other, and the inclination angle of the first pressing surface 300 and the third pressing surface 311 is selected to represent the pre-pressing angle, which is the angle of the folded portion 101 relative to the overlapping portion 100, in this embodiment, the pre-pressing angle is 140 ° to 160 °, for example, 140 °,150 °,160 °, etc.

Specifically, in the pre-pressing step, the first plate 1 and the second plate 2 stacked together are first fixed to the top surface 70 of the tire mold 7, the surface of the first flange 10 facing away from the second flange 20 is aligned with the side reference surface 71 of the tire mold 7, and the second pressing surface 310 of the pressing overlap portion 100 is simultaneously pressed against the side reference surface 71.

In this embodiment, the initial position of the first roller 30 is located above the first flange 10, the first roller 30 moves down to the left side of the portion to be bent 101 first, then the first base roller 31 moves to the left, and the portion to be bent 101 is bent towards the first roller 30 under the pressure of the first base roller 31. Based on the position of the first roller 30 and the angle of the first pressing surface 300, the portion 101 to be bent is bent to the left by 30 °, that is, the pre-pressing angle is 150 °.

Then the first flange 10 is clamped by the first base wheel 31 and the first roller 30, the relative positions of the first base wheel 31 and the first roller 30 are kept unchanged, then the first plate 1 and the second plate 2 rotate clockwise or anticlockwise, the first base wheel 31 and the first roller 30 rotate along with the first base wheel, and the prepressing process is finished when the first plate 1 and the second plate 2 rotate for one circle. After the pre-pressing process is completed, the first roller 30 moves toward the upper left position in fig. 5 to exit the binding area, and the first base roller 31 moves horizontally to the right to exit the binding area. The first flanging 10 is rolled by adopting the cooperation of the two pressing wheels on the first base wheel 31 and the first roller 30, so that the processing and forming effects of the first flanging 10 are improved.

In this embodiment, the pre-pressing process is followed by the re-pressing process, and in each re-pressing process, two pressing wheels are located on one side of the first flange 10 opposite to the second flange 20 and respectively press against the overlapped portion 100 and the portion to be bent 101, and as each re-pressing process is performed, the re-pressing angle between the portion to be bent 101 and the overlapped portion 100, which are pressed and bent, gradually decreases. The pre-pressing angle and the re-pressing angle of each re-pressing procedure are gradually reduced, the pre-pressing angle and each re-pressing angle are between 0 and 180 degrees, the to-be-bent part 101 pressed and bent by the abutting and pressing procedure is pressed on the second flanging 20, and the final pressing angle between the to-be-bent part 101 and the overlapping part 100 is 0 degrees.

It should be noted that, in the back pressure process, the base wheel approaches the first flange 10 from a position spaced apart from the first flange 10, and presses against the first flange 10, that is, before the roller rolls, the base wheel moves and presses against the overlapping portion 100, and then the roller moves.

In this embodiment, the re-pressing process specifically includes a first re-pressing process and a second re-pressing process that are sequentially performed. In the first and second back pressing steps, different rollers are used in the subsequent final pressing step. In the first back pressing step, the first roller 30 exits the hemming region and is switched to the second roller 32, and at this time, the first base roller 31 is also switched to the second base roller 35. In the second back pressing process, the second roller 32 exits the binding area and is switched to the third roller 33, and the second base roller 35 is unchanged. In the final pressing step, the third roller 33 exits the trimming area and is switched to the fourth roller 34, and the second base roller 35 is unchanged.

Preferably, the re-pressing angle in the first re-pressing step is 80 ° to 100 °, preferably 90 °; the re-pressing angle in the second re-pressing step is 20 ° to 40 °, preferably 30 °.

As shown in fig. 6 and 7, when the first roller 30 exits the trimming area, the second roller 32 moves over the first turned-up edge 10 after the pre-pressing process, and the second base roller 35 moves from the right side in fig. 6 to the right side of the tire membrane.

The second roller 32 has a second rotating seat 320 capable of rotating along its own center line, and a second rolling wheel 321 formed at one end of the second rotating seat 320, in this embodiment, the second rolling wheel 321 is cylindrical as a whole. The second base wheel 35 is also cylindrical in shape as a whole, and the center line of the second roller 32 and the center line of the second base wheel 35 are perpendicular to each other.

Specifically, when the pre-pressing angle is 150 °, since the first flange 10 is already bent 30 ° after the pre-pressing process is completed, in order to facilitate bending the first flange 10 after the pre-pressing process is completed, the second roller 32 moves along the schematic position of the arrow in fig. 6 to press the first flange 10 at the beginning of the first re-pressing process, and at this time, the outer wall of the second base wheel 35 is pressed against the side reference surface 71 of the tire membrane. In the present embodiment, the second roller 32 applies pressure to the first flange 10 in a direction inclined downward and leftward by 60 °, and the first flange 10 is folded by the second roller 32, and the first re-pressing step is completed when the re-pressing angle of the first flange 10 with respect to the overlapped portion 100 is 90 °.

Because the first flange 10 has a certain angle after the pre-pressing process, the second roller 32 is pressed into the first flange 10 obliquely from the upper side of the first flange 10, so that the first flange 10 can be ensured to be bent smoothly, and deformation of other positions of the first flange 10 except for the bending position can be avoided.

Based on the positions of the second roller 32 and the second base wheel 35, the first plate 1 and the second plate 2 are rotated clockwise or counterclockwise at this time. If the first plate 1 and the second plate 2 are rotated clockwise in the above-mentioned pre-pressing process, the first plate 1 and the second plate 2 are preferably rotated counterclockwise in the first re-pressing process, so that the first flange 10 is formed conveniently.

The first back pressing step is followed by a second back pressing step, and the second back pressing step is specifically shown in fig. 8 and 9, and before entering the second back pressing step, the second roller 32 is withdrawn in the direction of the arrow in fig. 7, that is, in the upper right direction in the drawing, and then the third roller 33 is switched, and the position of the second base roller 35 is maintained.

It should be noted that the third roller 33 has a third rotating seat 330 having a cylindrical shape and capable of rotating along its own center line, and a third rolling wheel 331 formed at an end of the third rotating seat 330, the third rolling wheel 331 has two pressing surfaces, one of which is located at a front end of the third rolling wheel 331 and parallel to an outer wall of the third rotating seat 330, and the other of which is an inclined surface inclined toward the third rotating seat 330.

First, the front end of the third roller 33 abuts against the first flange 10 after the first re-pressing step is completed, at this time, the side reference surface 71 of the tire film abuts against the outer wall of the second base wheel 35, the overlapping portion 100 abuts against the outer wall of the second base wheel 35, then the third roller 33 presses down the first flange 10 in a downward and leftward inclined direction, the angle of inclination of the third roller 33 is preferably 5 °, and the first flange 10 is bent by one of the inclined pressing surfaces of the third roller 33. And the third roller 33 is inclined to press the first flange 10, which is beneficial to the forming of the first flange 10. In this process, the included angle between the portion to be bent 101 and the overlapping portion 100, that is, the re-pressing angle is between 20 ° and 40 °, for example, may be 20 °,30 °,40 °, and the like.

Based on the positions of the third roller 33 and the second base wheel 35, the first plate 1 and the second plate 2 are rotated clockwise or counterclockwise at this time. If the first plate 1 and the second plate 2 are rotated counterclockwise in the above-mentioned first re-pressing process, the first plate 1 and the second plate 2 are preferably rotated clockwise in the second re-pressing process, so that the first flange 10 is formed conveniently.

After the second re-pressing step, the first flange 10 can already partially cover the second edge, so that after the second re-pressing step, the final pressing step is used to perform final bending on the first flange 10, so that the first flange 10 completely covers the second flange 20.

The final pressing step is described below with reference to fig. 10 to 12, and before the final pressing step is started, the third roller 33 is retracted from the trimming area toward the upper right, and at this time, the second base roller 35 is moved horizontally rightward, and the fourth roller 34 is switched to the trimming area.

Specifically, the fourth roller 34 has a cylindrical fourth rotating seat 340 capable of rotating along its own center line, and a fourth rolling wheel 341 formed at the front end of the fourth rotating seat 340, where the fourth rolling wheel 341 has two inclined pressing surfaces, and the inclined directions of the two pressing surfaces are opposite to each other, so that the outer contour of the fourth rolling wheel 341 is V-shaped. At the beginning of the final pressing process, the fourth roller 34 is located right above the edge of the first turned-up edge 10, and then the second base wheel 35 moves horizontally to the left and presses against the side reference surface 71 of the tire membrane, while the fourth roller 34 moves downward to abut against the edge position of the first turned-up edge 10.

Then the fourth roller 34 moves horizontally to the right, and in the process of moving the fourth roller 34, the to-be-bent portion 101 on the first flange 10 is pressed to bend towards the direction of the second flange 20 until the to-be-bent portion 101 completely fits the second flange 20, at this time, the positions of the fourth roller 34 and the second base wheel 35 are kept unchanged, and the first plate 1 and the second plate 2 rotate clockwise for one circle, so that the edge rolling of the first plate 1 is completed, and the to-be-bent portion 101 completely covers the second plate 2. When the first flange 10 has a back pressure angle of 0 ° with respect to the overlapped portion 100, the final pressure process is completed.

After the finishing process is completed, the fourth roller 34 is withdrawn from the trimming area toward the upper left position so as not to damage the first plate 1, the inclined withdrawal angle of the fourth roller 34 may be 5 °, and simultaneously the second base roller 35 is moved horizontally rightward to withdraw from the trimming area, and the first plate 1 and the second plate 2 are thus completed.

In addition, the rotation of the first plate 1 and the second plate 2 described above may be performed by a robot, or by another form of rotation mechanism, as long as it is ensured that the first plate 1 and the second plate 2 can be rotated so that the first flange 10 is formed.

It should be noted that, when the edging method of the present embodiment is applied to a vehicle, the first plate 1 and the second plate 2 are formed into a vehicle roof with a sunroof after edging, that is, the first plate 1 is a roof outer plate, the second plate 2 is an inner plate, the first flange 10 of the first plate 1 is a sunroof inner flange, and the sunroof inner flange is wrapped at the edge position of the second plate 2 by rolling, so as to form the vehicle roof with a sunroof. The second plate 2 can be replaced according to the shape of the first plate 1, and thus can be applied to sunroofs of different types. Of course, the trimming method of the present embodiment may be applied to processes in other fields, and may be implemented in various other modes without limiting the specific embodiments, without departing from the gist or main characteristics thereof.

The trimming method of the present embodiment forms the portion to be bent 101 in four steps of the pre-pressing step and the three re-pressing steps, whereby the first flange 10 can be bent with high accuracy even from a state where there is no bending moment while suppressing deformation that occurs when the amount of bending at one time is large. The binding process is simplified, and the production efficiency of binding molding can be obviously improved.

Note that, the rollers of the present embodiment are the first roller 30, the second roller 32, the third roller 33, and the fourth roller 34; the base wheel comprises a first base wheel 31 and a second base wheel 35. The rollers and the base wheels are arranged in pairs in each procedure, the running route of the base wheels is taken as a reference route, the rollers follow the base wheels to run, and the rollers roll along the length direction of the first flanging 10 to finish rolling.

While the first roller 30, the second roller 32, the third roller 33 and the fourth roller 34 and the base wheels thereof in the paired arrangement may be simultaneously provided on one robot, the driving rotation mechanism provided on the robot is used to rotate the different rollers in each process, of course, the first roller 30, the second roller 32, the third roller 33 and the fourth roller 34 and the base wheels thereof in the paired arrangement may be provided on a plurality of robots, but in order to save stations, the first roller 30, the second roller 32, the third roller 33 and the fourth roller 34 are all provided on the same robot in a preferred embodiment. Accordingly, the first base wheel 31 and the second base wheel 35 may be disposed on the robot, or both the first base wheel 31 and the second base wheel 35 may be disposed on one robot, and the approaching motion of the first roller 30, the second roller 32, the third roller 33 and the fourth roller 34, the first base wheel 31 and the second base wheel 35 before rolling may be achieved by adding related mechanisms, for example, using cylinders to drive the movement of the first base wheel 31 and the second base wheel 35.

The robot may be a multi-joint robot including a robot arm and a main body base, the main body being rotatably fixed to the robot table, and the tip of the robot arm being rotatable and capable of freely exchanging the first roller 30, the second roller 32, the third roller 33, and the fourth roller 34. The movement tracks of the first roller 30, the second roller 32, the third roller 33 and the fourth roller 34 are moved and replaced by the robot according to a set program.

The robot is adopted to drive the pinch roller to advance, so that the processing technology difficulty of the first flanging 10 can be reduced, and the quality of edging is ensured. In addition, the robot is convenient to debug, the initial debugging time can be effectively shortened, the requirement of quick piece discharging in the initial debugging stage is guaranteed, meanwhile, the edging can be realized by using one robot, namely, the production requirement can be met by only one station, the production area is reduced, and the reduction of the development cost is also facilitated.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. A rolling method, wherein a first flanging (10) at the edge part of a first plate (1) is bent in a rolling manner, a second flanging (20) at the edge part of a second plate (2) is overlapped on the inner side of the first flanging (10), and the bent first flanging (10) is wrapped on the second flanging (20); the method is characterized in that:

The edge rolling method comprises a pre-pressing process, a plurality of re-pressing processes and a final-pressing process which are sequentially arranged, wherein each process adopts two pressing wheels rolling along the first flanging (10) to roll the first flanging (10);

the first flange (10) comprises an overlapping portion (100) overlapping the second flange (20), and a portion to be bent (101) higher than the second flange (20);

in the pre-pressing step, the two pressing wheels clamp the to-be-bent part (101), so that the to-be-bent part (101) bends towards one side of the second flanging (20) and forms an included angle of a pre-pressing angle with the overlapped part (100), and the pre-pressing angle is 140-160 degrees;

In the re-pressing step and the final-pressing step, the two pressing wheels are positioned on one side of the first flanging (10) opposite to the second flanging (20) and respectively pressed against the overlapped part (100) and the to-be-bent part (101) so as to press the to-be-bent part (101) to gradually bend and finally press the second flanging (20);

The re-pressing process comprises a first re-pressing process and a second re-pressing process which are sequentially carried out, wherein in the two re-pressing processes, the re-pressing angle between the to-be-bent part (101) and the overlapped part (100) which are pressed and bent gradually decreases, the re-pressing angle in the first re-pressing process is 80-100 degrees, and the re-pressing angle in the second re-pressing process is 20-40 degrees;

Before the pre-pressing step, the first plate (1) and the second plate (2) which are overlapped together are firstly fixed on a top table surface (70) of a tire mold (7), the surface of one side of the first flanging (10) opposite to the second flanging (20) is aligned with a side reference surface (71) of the tire mold (7), and the pressing wheel which is pressed against the overlapped part (100) is simultaneously pressed against the side reference surface (71);

The two pinch rollers are respectively a roller provided with a first pressing surface (300) and a base wheel provided with a second pressing surface (310), in the pre-pressing process, the base wheel is positioned on one side of the first flanging (10) opposite to the second flanging (20), the first pressing surface (300) and the second pressing surface (310) clamp the to-be-bent part (101), in the re-pressing process and the final pressing process, the second pressing surface (310) is abutted against the overlapped part (100), and in the pre-pressing process, a third pressing surface (311) rolled on the overlapped part (100) is further arranged on the base wheel.

2. The piping method according to claim 1, characterized in that:

In the final pressing step, the portion to be bent (101) is pressed against the second flange (20), and the final pressing angle between the portion to be bent (101) and the overlapping portion (100) is 0 °.

3. The piping method according to claim 1, characterized in that:

Before rolling in each process, the base wheel approaches the first flanging (10) from a position which is separated by a certain distance from the first flanging (10) and is pressed against the first flanging (10).

4. The piping method according to claim 1, characterized in that:

In the re-pressing step and the final-pressing step, the roller is located above the portion to be bent (101), and before rolling, the roller approaches the portion to be bent (101) from a position spaced from the portion to be bent (101) by a certain distance and abuts against the portion to be bent (101).