CN1228155C - Method and apparatus for forming two flanges on a metal sheet - Google Patents

Abstract

The invention relates to a method for forming two opposite flanges on a metal sheet, in particular a tapered sheet, for building purposes using a rollformer (1), in which a first flange is formed at a first side of the rollformer (1), and a second flange is formed at a second side of the rollformer (1). According to the invention, the metal sheet is moved from a front end (5) to a back end (6) of the rollformer (1) to provide the sheet with its first flange during its movement, and subsequently the metal sheet is moved from the back end (6) to the front end (5) of the rollformer to provide the sheet with its second flange during its movement. The invention also relates to a rollformer (1) with which it is possible to carry out the above method.

Description

Method and apparatus for forming two flanges on sheet metal

technical field

The present invention relates to a method of forming two opposing flanges on a metal sheet, in particular a wedge-shaped sheet, for construction use using a roll former, in which method a first flange is formed on a first side of the roll former, A second flange is formed on a second side of the roll former. The invention also relates to an apparatus for forming two opposing flanges on a sheet metal for construction purposes.

Background technique

Many buildings today, especially their roofs, are constructed of sheet metal. The longitudinal sides of the metal plates are bent upwardly to form opposing flanges to define a standing seam formed by a flange of one plate and the opposing flange of an adjacent plate.

Most plates used for construction purposes are straight, rectangular sheets on which two flanges are formed using a roll former with rolls on either side of the roll former, using which the sheet passes through the roll former simultaneously Two flanges are formed.

However, modern buildings are often designed with more complex forms, such as pyramidal forms. Straight plates cannot be used for this type of form, and wedge-shaped plates must be manufactured. In order to form opposing flanges on a wedge-shaped sheet, it is not possible to use conventional roll formers for straight sheets.

For forming a flange on a wedge-shaped sheet it is known to use a roll former with a first forming roll on one side and a second forming roll on the other side, by making the first side of the wedge-shaped sheet The first flange can be formed on the wedge-shaped sheet by moving from the start end through the first forming roll to the terminal end, and the sheet can be retrieved by moving the second side of the wedge-shaped sheet from the start end through the second forming roll to the terminal end. A second flange is formed on the sheet.

This makes it possible to form the wedge-shaped sheet into the desired two flanges, but this method is time consuming.

Contents of the invention

It is an object of the present invention to provide a method of forming flanges, especially on wedge-shaped metal sheets, which is faster than existing methods and which at the same time is easy to use.

Another object of the present invention is to provide a device with which flanges can be formed, in particular on wedge-shaped metal sheets, faster than with known devices.

The technical solution according to the first aspect of the present invention is as follows: A method of forming two opposing flanges using a roll former on a sheet metal for construction purposes, in which method the first flange is The first side is formed while the second flange is formed on the second side of the roll forming machine, characterized in that the metal sheet is moved from the front end to the rear end of the roll forming machine so that the sheet has its first flange during its movement , and then the metal sheet is moved from the rear end of the roll former to the front end so that the sheet has its second flange during its movement, and the metal sheet with the first flange is formed between the first and second flanges Move to one side.

One of these objects can be achieved using the method according to the invention, in which the metal sheet is moved from the front end to the rear end of the roll forming machine so that its first flange is formed on the sheet during its movement, and the metal sheet is subsequently The sheet moves from the rear end to the front end of the roll former to form its second flange on the sheet during its movement.

Using this method it is no longer necessary to retrieve the sheet metal with the first flange back to the front end of the roll former. On its way back to the front end of the roll former, the second flange can now be made directly, as soon as the sheet has passed through all the forming rolls of the roll former, the forming of the flange has been completed. A considerable saving of time is achieved by using the method according to the invention, since it is no longer necessary to transfer the metal sheet from the back end to the front end of the roll former, also wedge shaped sheets can easily be 20 meters or more in length.

According to a preferred method, between the forming of the first and second flanges, the metal sheet with the first flange is shifted to one side in order to be able to form the second flange on the second forming roll of the roll former.

It is preferred that the flanged sides remain aligned with the roll former at least as the metal sheet enters the roll former. This ensures that the height of the formed flange is uniform over its entire length.

According to a second aspect of the present invention there is provided an apparatus or roll forming machine capable of forming two opposing flanges on sheet metal for construction purposes, particularly on wedge-shaped sheets, the apparatus having a front end, a rear end and a joint Two sides of a continuous array of forming rolls, wherein a first forming roll is provided on a first side of the apparatus to form a first flange on a sheet metal and a second forming roll is provided on a second side of the apparatus to form a bead on the sheet metal Forming the second flange on the sheet metal, characterized in that forming rolls are provided on a first side of the apparatus for forming the first flange starting at the front end of the apparatus, and forming rolls are provided on a second side of the apparatus Used to form a second flange starting at the rear end of the unit.

This equipment can be used in the method described above to form flanges on sheet metal faster than using known equipment. A first forming roll is provided in a conventional manner on a first side of the roll former to progressively form the first flange as the sheet metal moves through the roll former from the front end to the rear end. However, the second forming roll is arranged so as to gradually form the second side edge of the metal sheet as the metal sheet moves through the roll former from the rear end to the front end. The order of the second rolls is therefore reversed when compared with conventional roll formers for wedge-shaped sheet metal. Although the roll former is designed for wedge-shaped sheets, it can of course also be used to form flanges on straight, rectangular sheets.

Preferably, the apparatus comprises a central longitudinal frame having support shafts protruding on two sides of the frame for the forming rolls, the supporting shafts protruding on the first side of the frame supporting the first forming rolls, and on the second side of the frame The supporting shaft protruding from both sides supports the second forming roll.

Thus, the elongated roll forming machine is provided with a longitudinal frame with drive elements, and supporting shafts with forming rolls projecting on both sides of the frame. This configuration also allows quick and easy changing of the forming rolls when sheet metal with flanges of different heights is required.

According to a preferred embodiment, the shafts are mounted in pairs vertically aligned in line, while all upper and/or lower shafts are adjustable in height. To form flanges of different heights, at least all of the upper or all of the lower shafts should be height adjustable to provide the required intermediate distance between the shafts forming a pair.

It is preferred to provide a central gearbox in order to synchronize all shafts.

In a preferred embodiment, an entry table is provided at the front end of the equipment to guide the metal sheet. It is preferred that the entry table is provided with a guide device, such as a guide roller, and a pushing device, such as a pneumatic cylinder, to force the metal sheet to be pressed. Rests on guides aligned in line with the first forming roll.

An entry table is positioned at the front end of the roll former to support the sheet metal before and during forming the first side of the sheet metal in the roll former. In order to be able to move the sheet metal, the entry table will have backup rollers or other movable support means. Since the first side of the sheet metal must be aligned with the first forming roll, it is preferred to provide guide means, such as rollers, to guide the sheet. In order to force the web against the guide rollers, a thrusting device is provided, which must be movable since the wedge-shaped web varies in width.

Preferably a transfer table is provided at the rear end of the apparatus to guide the sheet metal as it moves from the first side of the apparatus to the second side, preferably the moving table is provided with guide means, such as guide rollers , and pushing means, such as pneumatic cylinders, so as to force the metal sheet to be pressed against the guide means aligned in line with the second forming roll.

This transfer table serves the same purpose as the entry table, but it is at the rear end of the roll former so that the second side of the sheet metal is aligned with the second forming roll, and in addition, the transfer table is designed configured to provide lateral movement of the sheet metal from a first side to a second side of the roll former after forming the first flange.

Preferably, the guides of the transfer table are retractable below the surface of the transfer table. In this way, the transfer table can remain in its position, while the sheet metal can be pushed from the first side to the second side when the guide rollers are retracted, after which the guide rollers are reset to guide the sheet metal. Alternatively, the guide rolls are not retractable, but the transfer table with the sheet metal thereon moves as a unit from the first side of the roll former to the second side.

The present invention will be described with reference to an exemplary embodiment.

Description of drawings

Figure 1 shows a schematic top view of the plant according to the invention together with wedge-shaped sheets at different stages of production.

FIG. 2 shows a side view of the device of FIG. 1 .

Detailed ways

FIG. 1 shows a plan view of a roll forming machine 1 according to the invention, with an entry table 10 and a transfer table 20 . As shown, a wedge-shaped sheet metal with a flange in 4 sites I, II, III, IV of its manufacturing process. FIG. 2 shows a side view of the roll forming machine 1 and the tables 10 , 20 .

The roll former 1 has a first support shaft 2 and a second support shaft 3 supported by a frame 4 with a front end 5 and a rear end 6 , a first side 7 and a second side 8 . The support shafts are in pairs, for example 2a, 2b are installed, as shown in Figure 2. Forming rolls (not shown) are installed on the support shafts 2,3. A different pair of first forming rolls is mounted on each pair of first support shafts 2 . From the front end 5 to the rear end 6 of the roll forming machine 1, a pair of forming rolls arranged in pairs form a flange on the first side edge of the metal sheet from a flat state. Similarly, different pairs of second forming rolls are installed on each pair of second support shafts 3, and the different pairs of second forming rolls arranged in pairs from the rear end 6 to the front end 5 make the second side of the thin plate Form the flange from a flat state.

The entry table 10 is placed at the front end 5 of the roll former 1 and has support means for the sheet metal such as backup rolls (not shown), and guide rolls 11 placed in line with the frame 4 of the roll former 1, so The sheet metal enters the roll former 1 with its first side aligned with the forming rolls. Installed in the entry table are three pushing devices, the pushing rollers 12 of which are shown. These push rollers are connected, for example, to pneumatic cylinders which continuously push the metal sheet against the guide rollers, even when the width of the sheet varies, as is the case with wedge-shaped sheets.

The same applies to the transfer table 20 with guide rollers 21 and pressure rollers 22 , taking into account appropriate changes in detail. However, the transfer table must also allow a lateral movement of the metal sheet from the first side 7 to the second side 8 of the roll former 1 . For this, it is possible to move the transfer table 20 as a whole. Alternatively, it is possible for the sheet metal to move on the transfer table 20 while the transfer table remains stationary in its position. To be able to do this, the guide rollers 21 must be able to retract below the table surface so as not to impede the movement of the sheet from the first side 7 to the second side 8 of the roll former.

The forming of the sheet metal of the second opposing flange will be described hereinafter.

In Figure 1, the wedge-shaped metal sheet is shown at its forming site I, where the sheet is still flat. The sheet is placed on the entry table 10 and its first side is pushed against the guide rollers 11 by push rollers 12 .

The sheet metal then moves in direction A into the roll former 1 and in direction B through the roll former. During the movement of the web on the entry table 10, the push rollers 12 move the guide rollers 11 in direction P, since the width of the wedge-shaped web becomes smaller towards the end of the web.

A first forming roll on the first side 7 of the roll former 1 continuously forms a first flange on the metal sheet as the sheet is moved through the roll former 1 .

After the sheet has left the first side of the roll former 1 , the metal sheet is at its location II where the sheet has a first flange on its first side.

The metal sheet is then moved sideways in direction C on the transfer table 20 until it is at the second side 8 of the roll forming machine 1 . There the sheet metal is pressed against guide rollers 21 by push rollers 22 . This is Venue III for sheet metal.

Thereafter, the sheet metal moves in direction D into the roll former 1 and in direction E through the roll former. During the movement of the veneer on the transfer table 20, the push rollers 22 are moved away from the guide rollers 21 in direction P, since during this movement the width of the wedge-shaped veneer increases towards the extremity of the veneer.

A second forming roll on the second side 8 of the roll former 1 continuously forms a second flange on the metal sheet as the sheet moves through the roll former 1 .

When the sheet leaves the roll former 1 it has reached its fourth and final station IV and can be removed in direction F.

Although not shown, it will be apparent that the roll former according to the invention has moving means such as moving rollers for moving the sheet metal through the roll former and over the table.

In order to be able to form sheet metal with different flange heights, for example the upper support shaft is adjustable in the vertical direction so that forming rolls with different diameters can be used. All supporting shafts are synchronized using a central gearbox.

It will be appreciated that while the roll former is designed to form flanges on wedge-shaped sheet metal, the roll former can equally be used to form flanges on straight, rectangular sheet metal. It will also be clear that although the forming in Figure 1 is shown starting from the broad side of the wedge-shaped sheet, it is also possible to start from the narrow side.

Furthermore, it will be appreciated that modifications can be made to the design of the roll former without changing the concept of the roll former. For example it is possible to manufacture wide frames for roll formers and thus have the ends of the support shafts mounted on the left and right sides of the frame. In this way, the roll former looks like a traditional roll former for straight sheet in which the sheet had to be moved between the two sides of the roll former, but now the forming rolls are mounted differently and now the metal The sheet moves first against one side of the rollformer and then returns against the other side of the rollformer.

Claims (14)

1. in a kind of method that is used for using on the sheet metal of building occupancy two relative flanges of roll forming machine shaping, first flange forms in first side of roll forming machine in the method, and second flange forms in second side of roll forming machine, it is characterized in that sheet metal is moved to the rear end so that make thin plate have its first flange from the front end of roll forming machine its moving process, then sheet metal is moved to front end so that make thin plate have its second flange from the rear end of roll forming machine its moving process, between first and second flanges that are shaped with the sheet metal of first flange by to a side shifting.

2. according to the method for claim 1, it is characterized in that described sheet metal is a tapered sheet.

3. according to the method for claim 1 or 2, it is characterized in that at least the side that the sheet metal of flange is set keeps being aligned to straight line with the roll forming machine in sheet metal enters the process of roll forming machine.

4. at the equipment that is used for two relative flanges of shaping on the sheet metal of building occupancy, this equipment has a front end, one rear end, with two sides that have the forming rolls of arranging continuously one by one, first forming rolls on first side of equipment is configured to form first flange therein, and second forming rolls on second side of this equipment is configured to form second flange on sheet metal, it is characterized in that first forming rolls on first side of this equipment is provided so that the front end at this equipment begins to form first flange, and second forming rolls on this equipment second side is provided so that in the rear end of this equipment and begins to form second flange.

5. according to the equipment of claim 4, it is characterized in that this equipment comprises central longitudinal framing, this longitudinal framing has the bolster that is used for forming rolls that protrudes in framework two sides, support shaft supports first forming rolls that protrudes in framework first side, and support shaft supports second forming rolls that protrudes in framework second side.

6. according to the equipment of claim 5, it is characterized in that vertically aiming in pairs for described and point-blank install, axle above all and/or the axle below all in height are adjustable simultaneously.

7. according to the equipment of claim 5, it is characterized in that the centre tooth roller box is set so that all axles are synchronous.

8. according to the equipment of claim 6, it is characterized in that the centre tooth roller box is set so that all axles are synchronous.

9. according to any one equipment of claim 4-8, it is characterized in that front end at this equipment is provided with one and enters workbench so that sheet metal is led.

10. according to the equipment of claim 9, it is characterized in that entering workbench and be provided with guider and pressing device, pressing device is used for sheet metal is pressed against the guider that is aligned to straight line with first forming rolls.

11. according to any one equipment of claim 4-8, it is characterized in that the conversion work platform being set, so that move by side to from equipment first moving process of second side this sheet metal guiding at sheet metal in the rear end of this equipment.

12. according to the equipment of claim 11, it is characterized in that the conversion work platform is provided with guider and pressing device, pressing device is used for sheet metal is pressed against the guider that is aligned to straight line with second forming rolls.

13., it is characterized in that the guider of conversion work platform is collapsible to below the surface of this conversion work platform according to the equipment of claim 12.

14., it is characterized in that described equipment is the roll forming machine according to the equipment of claim 4.

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