GB2061788A - A method of shaping metal sheet - Google Patents
A method of shaping metal sheet Download PDFInfo
- Publication number
- GB2061788A GB2061788A GB8034973A GB8034973A GB2061788A GB 2061788 A GB2061788 A GB 2061788A GB 8034973 A GB8034973 A GB 8034973A GB 8034973 A GB8034973 A GB 8034973A GB 2061788 A GB2061788 A GB 2061788A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- metal sheet
- knurling
- width
- profile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/095—U-or channel sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/005—Edge deburring or smoothing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Metal Rolling (AREA)
Abstract
A method of shaping an elongate sheet 11 to make from it a channel-shaped profile (Fig. 7) comprises cold working the metal sheet successively (a) by rolling, e.g. by tapering its edges, to increase its width, (b) knurling the longitudinal edge or edges of the metal sheet with one or more rolls which at the same time reduce the width of the metal sheet to substantially its original value, and (c) roll-forming the sheet to the channel-shaped profile. <IMAGE>
Description
SPECIFICATION
A method of shaping metal
This invention relates to a method of shaping metal in the form of a parallel-sided elongate sheet to make from it a formed profile that is of uniform cross-section except that at least one longitudinal edge is worked to generate a repeating pattern along its length.
In accordance with the present invention, the method comprises cold working the metal sheet successively (a) by rolling to increase the width of sheet, (b) with one or more than one knurling wheel that generates the repeating pattern in the longitudinal edge or edges of the metal sheet and at the same time reduces the width of the metal sheet to substantially its original value, and (c) by rollforming to the said profile.
Preferably there are two knurling wheels, one for each longitudinal edge, and the rotation of the knurling wheels is synchronised.
Where there are more than two knurling wheels (e.g. in the case where there are four knurling wheels, two for each longitudinal edge) preferably the rotation of all the knurling wheels is synchronised.
Preferably the width of the sheet is increased by step (a) by tapering at least one longitudinal edge.
A preliminary operation prior to step (a) is preferably included in which the or each longitudinal edge of the metal sheet that is to be patterned in step (b) is pre-shaped by at least one knurling wheel.
Preferably the profile formed in step (c) is a channel of substantially U-shaped cross-section.
One important use of this method is to form a channel of the kind (for example sold by the
Applicants through their subsidiary BlCC Vantrunk Limited under the trade mark Leprack as
Leprack Channel) having in-turned flanges with grooves at the free ends of the limbs of the channel, to which fixings are commonly made by using a rectangular nut (usually with two rounded corners) having ribs in its bearing surface that can be passed through the open slot between the in-turned flanges and then rotated through 90 degrees to engage behind those flanges, the screw then being tightened so the ribs in the nut engage the grooves in the in-turned flanges, preventing the nut moving longitudinally in the slot. This type of screw-fixing is described in our UK Patent Applications 7918495 and 7921156.
This method has particular use when applied to a sheet of steel.
This invention also includes apparatus for carrying out the method as hereinbefore described.
The invention is now described with reference to the accompanying drawings in which:
Figure 1 is a block diagram of a method in accordance with the invention;
Figure 2 is a plan view of apparatus for carrying out another method in accordance with the invention;
Figure 3 is an end view of part of the apparatus shown in Fig. 2;
Figure 4 is a cross-sectional view on the line IV-IV in Fig. 2;
Figure 5 is a cross-sectional view on the line V-V in Fig. 2;
Figure 6 is a cross-sectional view on the line VI-VI in Fig. 2; and
Figure 7 is a perspective view of a channel formed by the apparatus shown in Fig. 2.
In the block diagram shown in Fig. 1 a metal sheet 1, of width W, is subjected to a rolling step 2 in which the width of the metal sheet is increased, the sheet is then subjected to a pattern generating and width reducing step 3, which reduces the width of the metal sheet to substantially its original value W, and at the same time form a pattern on the longitudinal edges 4, 5 of the metal sheet.
The metal sheet 1 is then subjected to a roliforming step 6, which rolls the sheet into a channel-shaped profile 7.
Referring to Figs. 2 to 5 of the drawings the apparatus comprises two substantially identical knurling machines 8A, 8B. Each knurling machine 8A, 813 comprises two knurling wheels 9, 10 and means for guiding a metal sheet 11 through the machine in the form of two guide wheels 1 2, 13 which surround the knurling wheels 9, 10. The knurling wheels 9, 10 are inter-connected by a belt 14 and pulley arrangement. One of the knurling wheels 9 is connected through its spindle 15 and a gear wheel 16 to an independent gear wheel 17. The belt 14 passes round a pulley 1 8 mounted on the same spindle 19 as the independent gear wheel 17.
and a pulley 20 mounted on the spindle 21 of knurling wheel 10. The tension in the belt 14 is regulated by passing the belt over a roller 22 which is pulled against the belt by a spring 23.
The metal sheet 11 moves through each machine 8A, 88 in the direction X. Guide wheels 12, 1 3 keep the longitudinal edges 24, 25 of the sheet 11 perpendicular to the rotational axis of the knurling wheels 9, 10.
Guide blocks 26, 27 prevent the metal sheet 11 buckling while it passes between the knurling wheels 9, 10. The knurling wheels 9, 10 knurl grooves 28 in the longitudinal edges 24, 25 of the metal sheet 11. The belt 14 Lob. and pulley arrangement synchronises the rotation of the two knurling wheels 9, 10 so that a groove is knurled in each longitudinal edge 24, 25 at the same time, the grooves being directly opposite.
Each machine 8A, 8B also includes an adjustor 29 for varying the separation of the knurling wheels 9, 10 allowing metal sheets of varying width to be knurled on each machine. The adjustor 29 comprises a plate 30 attached to the spindle 15 of the knurling wheel 9 and to pin 31. The knurling wheel 9 is moved by rotating adjusting screws 32 mounted on the side of each machine 8A, Be so that the knurling wheel 9 pivots about the pin 31.
Situated between the knurling machines 8A, 8B is a pair of rollers 33 (Fig. 6) between which the metal sheet 11 passes. The rollers 33 increase the width of the metal sheet 11 by tapering each longitudinal edge 24, 25.
Cam followers 34 are positioned at the input to the first knurling machine 8A to act as guides for the metal sheet 11.
The arrangement is such that the knurling wheels 9, 10 of the first knurling machine 8A knurl grooves 28 in the longitudinal edges 24, 25 of the metal sheet 11 to approxi- mately half the depth required. The rollers 33 put a taper on both corners of each longitudinal edge 24, 25 and slightly increase the width, of the metal sheet 11. The knurling wheels 9, 10 of the second knurling machine 8B knurl grooves 28 of the required depth in the longitudinal edges 24, 25 and reduce the width of the metal sheet 11 to its original value.
The knurling wheels 9, 10 of the first knurling machine 8A are driven at a slightly slower rate than the rate at which the rollers 33 rotate. Therefore in use when a metal sheet 11 is fed into the apparatus the knurling wheels 9, 10 of the first knurling machine 8A initially drive the metal sheet 11 through the machine 8A until the sheet reaches the rollers 33, at which time the rollers take over and pull the sheet through the first knurling machine 8A, and drive it towards and through the second knurling machine 88. The knurling wheels 9, 10 of the second knurling machine 8B are free-wheeling.
A roll-forming machine 35 is positioned at the output of the second knurling machine 8B. On passing through this machine 35 the metal sheet 11 is rolled into the profile of a channel 36 (Fig. 7) of substantially U-shaped cross-section, with the free ends of the limbs 37, 38 turned inwards to define flanges 39, 40 the grooves 28 formed by the knurling machines 8A, 88 being directed towards the base 41 of the channel.
This invention has the advantage that plain channel and channel with patterned edges can be made to the same size from the same width of strip:
Although this invention has been described for rolling a metal sheet into a channel-shape profile, this invention is not restricted to this particular arrangement, but could also be used for forming any other profile that is of uniform cross-section.
Claims (10)
1. A method of shaping metal in the form of a parallel-sided elongate sheet to make from it a formed profile that is of uniform cross-section except that at least one longitudinal edge is worked to generate a repeating pattern along its length comprising cold work, ing the metal sheet successively (a) by rolling to increase the width of the sheet, (b) with one or more than one knurling wheel that generates the repeating pattern in the longitudinal edge or edges of the metal sheet and at the same time reduces the width of the metal sheet to substantially its original value, and (c) by roll-forming to the said profile.
2. A method of shaping metal in the form of a parallel-sided elongate sheet to make from it a formed profile that is of uniform cross-section except that each longitudinal edge is worked to generate a repeating pattern along its length, comprising cold working the metal sheet successively (a) by rolling to increase the width of the sheet, (b) with two knurling wheels that generate the repeating pattern in the longitudinal edges of the metal sheet and at the same time reduces the width of the metal sheet to substantially its original value, and (c) by roll-forming to the said profile.
3. A method as claimed in Claim 2, in which the rotation of the knurling wheels acting on the two longitudinal edges of the sheet is synchronised.
4. A method as claimed in any one of the preceding claims in which the profile formed in step (c) is a channel of substantially Ushaped cross-section.
5. A method as claimed in any one of the preceding claims in which the width of the sheet is increased in step (a) by tapering at least one longitudinal edge.
6. A method as claimed in any one of the preceding claims including a preliminary operation prior to step (a) in which the or each longitudinal edge of the metal sheet that is to be patterned in step (b) is pre-shaped by at least one knurling wheel.
7. A method as claimed in any one of the preceding claims when applied to a sheet of steel.
8. Apparatus for carrying out the method as claimed in any one of the preceding claims.
9. A method of making a channel profile with toothed edges as hereinbefore described with reference to Fig. 1 of the accompanying drawings.
10. A method of making a channel profile with toothed edges as hereinbefore described with reference to Figs. 2 to 7 of the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8034973A GB2061788B (en) | 1979-11-02 | 1980-10-30 | Method of shaping metal sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7938050 | 1979-11-02 | ||
GB8034973A GB2061788B (en) | 1979-11-02 | 1980-10-30 | Method of shaping metal sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2061788A true GB2061788A (en) | 1981-05-20 |
GB2061788B GB2061788B (en) | 1983-05-18 |
Family
ID=26273428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8034973A Expired GB2061788B (en) | 1979-11-02 | 1980-10-30 | Method of shaping metal sheet |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2061788B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2600920A1 (en) * | 1986-07-04 | 1988-01-08 | Metaux Ste Parisienne | Knob for eliminating the relief (clearance) resulting from cutting a metal strip |
EP0507296A1 (en) * | 1991-04-05 | 1992-10-07 | Hadley Industries Plc | A channel, manufacture of the channel and fastener for use with the channel |
FR2810727A1 (en) * | 2000-06-21 | 2001-12-28 | Valeo Thermique Moteur Sa | Heat exchanger tube for car radiator comprises metal strip which is bent over to form edges with space between, tube being folded inwards to form groove into which brazing flux is introduced |
GB2357453B (en) * | 1998-09-08 | 2003-08-20 | Group Ltd Ibs | Building frame and method of construction |
CN102728684A (en) * | 2012-06-12 | 2012-10-17 | 安徽众源新材料股份有限公司 | Trimming device and method for copper strip of transformer winding |
-
1980
- 1980-10-30 GB GB8034973A patent/GB2061788B/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2600920A1 (en) * | 1986-07-04 | 1988-01-08 | Metaux Ste Parisienne | Knob for eliminating the relief (clearance) resulting from cutting a metal strip |
EP0507296A1 (en) * | 1991-04-05 | 1992-10-07 | Hadley Industries Plc | A channel, manufacture of the channel and fastener for use with the channel |
GB2255297A (en) * | 1991-04-05 | 1992-11-04 | Hadley Ind Plc | Manufacture of a channel |
GB2255297B (en) * | 1991-04-05 | 1995-01-04 | Hadley Ind Plc | A channel,manufacture of the channel and fastener for the use with the channel |
GB2357453B (en) * | 1998-09-08 | 2003-08-20 | Group Ltd Ibs | Building frame and method of construction |
US6813919B1 (en) | 1998-09-08 | 2004-11-09 | Ibs Group Limited | Method of making a frame member into U-section and C-section panel profiles |
FR2810727A1 (en) * | 2000-06-21 | 2001-12-28 | Valeo Thermique Moteur Sa | Heat exchanger tube for car radiator comprises metal strip which is bent over to form edges with space between, tube being folded inwards to form groove into which brazing flux is introduced |
CN102728684A (en) * | 2012-06-12 | 2012-10-17 | 安徽众源新材料股份有限公司 | Trimming device and method for copper strip of transformer winding |
Also Published As
Publication number | Publication date |
---|---|
GB2061788B (en) | 1983-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 20001029 |