JPH0139847B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized by the fact that at least one longitudinal edge is machined so as to produce a repeating pattern along its length, so as to produce a forming profile of uniform cross-section. This invention relates to a method of forming metal in the form of an elongated plate with sides.

According to the invention, the method comprises: (a) flattening the metal sheet to increase its width; and (b) using one or more knurling wheels on one or both longitudinal edges of the metal sheet. (c) successively cold-working the metal sheet by rolling forming it to said contour; Tatsu.

There are preferably two knurling wheels, one for each longitudinal edge, and the rotation of the knurling wheels is synchronized.

If there is more than one knurling wheel (eg, four knurling wheels, two for each longitudinal edge), it is preferred to synchronize the rotation of all the knurling wheels.

Preferably, the width of the metal plate is increased in step (a) by tapering at least one longitudinal edge.

Preferably, a preliminary operation is carried out before step (a) in which each longitudinal edge of the metal sheet to be shaped in step (b) is preformed by at least one knurling wheel.

Preferably, the profile formed in step (c) is essentially a channel of U-shaped cross section.

One important application of this method is for the type of channels having an inverted flange with a groove in the free end of the rim of the channel (e.g. as a Replac channel), which the applicant uses in its small company's BICC band under the Reprac trademark. a rectangular shape having ribs on its supporting surface such that it passes through the open slot between the internally curved flanges and rotates 90° to engage the rear of these flanges. Fixtures to the channel are usually made by using a nut (usually with two rounded corners), the threads of which are then tightened so that the ribs of the nut engage the grooves in the concave flange. , prevents the nut from moving vertically within the slot. Screw fasteners of this type are described in our UK Patent Application Nos. 7918495 and 7921156.

This method is successfully used on steel plates.

The invention also includes an apparatus for carrying out the aforementioned method.

The invention will now be described with reference to the accompanying drawings.

In the block diagram shown in FIG. 1, a metal sheet 1 having a width W is subjected to a rolling treatment 2 to increase its width, and then to a molding and width reduction treatment 3, in which the metal sheet is effectively It is reduced to its original width and at the same time forms a mold on the edges 4, 5 of the metal plate. The metal sheet 1 then undergoes a rolling forming process 6 which rolls the metal sheet into a channel-shaped profile 7.

Referring to Figures 2-5, the apparatus consists of two virtually identical knurling machines 8A, 8B. Each knurling machine 8A, 8B has 2
knurling wheels 9', 10' or knurling wheels 9, 10;
two guide wheels 12, each surrounding the
13 and a device for guiding the metal sheet 11 through the machine. The knurling wheels 9', 10' or knurling wheels 9, 10 are interconnected by a belt 14 and a pulley arrangement. One of the knurling wheels 9'
or 9 is connected to an independent gear 17 through its spindle 15 and gear 16. The belt 14 passes around a pulley 18 mounted on the same spindle 19 as its independent gear 17 and around a pulley 20 mounted on the spindle 21 of the knurling wheel 10. Adjustment is achieved by placing the belt over a roller 22 which is pulled against the belt by a tension spring 23 of the belt 14.

The metal plate 11 moves in the X direction through each machine 8A, 8B. The guide wheels 12, 13 hold the longitudinal edges 24, 25 of the metal plates perpendicular to the rotation axis of the knurling wheels 9', 10' or of the knurling wheels 9,10. The guide blocks 26, 27 are made of metal plates with knurling wheels 9',
10' or knurling wheels 9, 10, the metal plate 11 is held so as not to buckle. The knurling wheels 9', 10' or the knurling wheels 9, 10 are attached to the longitudinal edges 2 of the metal plate 11.
Add jagged grooves 28 to 4 and 25. The belt 14 and the pulley arrangement synchronize the rotation of the two knurling wheels 9', 10' or the knurling wheels 9, 10 so that a knurling groove is created simultaneously on each directly opposite longitudinal edge 24, 25.

Each machine 8A, 8B also has an adjusting device for varying the knurling wheels 9', 10' or the spacing of the knurling wheels 9, 10, respectively, so that a metal plate of varying width is jagged by each machine. The adjusting device 29 is connected to the knurling wheel 9' or to the spindle 1 of the knurling wheel 9.
5 and a plate 30 attached to a pin 31. The knurling wheels 9', 9 are moved by rotating an adjustment screw 32 mounted on the side of each machine 8A, 8B so that it pivots about a pin 31.

A pair of rollers 33 (FIG. 6) is located between the knurling machines 8A and 8B, and the metal plate 11 moves between the rollers. The rollers 33 increase the width of the metal plate 11 by tapering each longitudinal edge 24,25.

The cam driven member 34 is the first knurling machine 8A.
It is located at the entrance to the metal plate 11 and acts as a guide for the metal plate 11.

The knurling wheels 9', 10' of the first knurling machine 8A are adapted to knurl grooves 28 in the longitudinal edges 24, 26 of the metal sheet to approximately half the required width. The rollers 33 taper in both directions on each longitudinal edge 24, 25, slightly increasing the width of the metal plate 11. The knurling wheels 9, 10 of the second knurling machine 8B are provided with jagged grooves 2 at the required depth in the longitudinal edges 24, 25.
8 and narrow the width of the metal plate 11 to its initial value.

The knurling wheels 9', 10' of the first knurling machine 8A are driven at a rate slightly slower than the rotation rate of the roller 33. Therefore, in use, when the metal sheet 11 is fed into the device, the knurling wheels 9', 10' of the first knurling machine 8A are
First drive the metal sheet 11 through the machine 8A until it reaches the rollers 33, then
The rollers take over to pull the metal sheet past the first knurling machine 8A and drive it towards and through the second knurling machine 8B. The knurling wheels 9, 10 of the second knurling machine 8B rotate freely.

A rolling forming machine 35 is located at the outlet of the second knurling machine 8B. When passing through this machine 35, the metal sheet 11 is effectively rolled into the form of a channel 36 (FIG. 7) with a U-shaped cross-section, the free ends of the rims 37, 38 being bent inward to form a flange 39, 4
0 and the groove 28 formed by the knurling machines 8A, 8B faces the base 41 of the channel.

The invention has the advantage that flat channels and channels with shaped edges can be made of the same size from the same width of the strap.

Although the invention has been described with respect to rolling metal sheets into channel-type profiles, the invention is not limited to this example, but can also be used to form other profiles with uniform cross-sections. I can do it.

[Brief explanation of drawings]

1 is a block diagram of a method according to the invention, FIG. 2 is a plan view of an apparatus for carrying out another method according to the invention, and FIG. 3 is a part of the apparatus shown in FIG. FIG. 4 is a cross-sectional view taken along the - line in FIG. 2, FIG. 5 is a cross-sectional view taken along the - line in FIG. 2, and FIG. FIG. 3 is a cross-sectional view taken along the line - in FIG. 2; 7 is a perspective view of a channel formed by the apparatus shown in FIG. 2; FIG. 1...Metal plate, W...Width of metal plate, 2...Rolling treatment stage, 3...Width reduction treatment stage, 4, 5...
Vertical edge of metal plate, 6...Rolling forming stage, 7...
Channel shape profile, 8A, 8B... Knurling machine, 9, 9', 10, 10'... Knurling wheel, 11... Metal plate, 12, 13... Guide wheel, 14... Belt, 15... Spindle,
16...Gear, 17...Independent gear, 18...Pulley, 19...Spindle, 20...Pulley,
21...Spindle, 22...Roller, 23...
...Spring, 24, 25...Vertical edge, 26, 27...
...Guide block, 28...Groove, 28...Adjusting device, 30...Plate, 31...Pin, 32...
Adjustment screw, 33... roller, 35... rolling forming machine, 36... channel, 37, 38... rim.

Claims (1)

[Claims] 1. At least one vertical edge portion 4, 5, 24, 2
The shape of the elongate plate 1, 11 with parallel sides so as to produce a forming profile 7, 36 of uniform cross-section, except that 5 is worked to produce a repeating pattern 28 along its length. (a) rolling 2, 33 to increase the width of the metal plate;
(b) one or more knurling wheels 9, 10 produce a repeating pattern on one or both longitudinal edges of said metal plate and at the same time substantially reduce the width of said metal plate; A method for forming metal, characterized in that the metal sheet is continuously cold-worked by reducing it to an initial value and (c) rolling forming 6, 35 to said contour. 2 two longitudinal edges 4 of metal plates 1, 11;
2. A method for forming metal according to claim 1, characterized in that the rotation of the knurling wheels 9, 10 acting on the knurling wheels 5, 24, 25 is synchronous. 3. A method as claimed in claim 1 or 2, characterized in that the contours 7, 36 formed in step 3(c) are channels of substantially U-shaped cross section. 4. Claim 1, characterized in that the width of the metal plates 1, 11 is increased in step (a) by tapering at least one longitudinal edge 4, 5, 24, 25. The metal forming method according to any one of Items 1 to 3. 5 One or each vertical edge 4 of the metal plates 1, 11,
5, 24, 25, i.e., the edges to be shaped in step (b) are provided with at least one knurling set in front of step (a) in addition to that in step (b). According to any one of claims 1 to 4, characterized in that a preliminary operation is carried out before step (a), such as pre-shaping by wheels 9', 10'. Method of forming metals as described. 6. The metal forming method according to any one of claims 1 to 5, wherein a steel plate is used as the metal plate.