ARCHING METALLIC PROFILES IN CONTINOUS IN-LINE PROCESS
A method and apparatus for manufacturing an arched metallic profile, in a continuous in-line process. The method comprises forming the metallic profile; and arching the formed metallic profile in a continuous in-line process. The apparatus includes a roll forming station configured to receive flat metallic composition and output a given profile. An arching device is configured to receive the metallic profile and bend the metallic profile having a desired radius of curvature wherein a portion of the arching device is displaced with respect to said roll forming station vertically and/or horizontally.
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This application claims priority to U.S. Provisional Application No. 61/012,929 filed Dec. 12, 2007 which is herein incorporated by reference in its entirety.
BACKGROUND1. Field of the Invention
The present invention generally relates to a method and apparatus for roll forming steel. More particularly, the present invention relates to a process and machine for forming arch configurations of metallic profiles from roll-formed steel during a continuous in-line process.
2. Discussion of Related Art
Continuous in-line processing of steel provides an efficient and relatively quick method for transforming flat strip steel into steel profiles to accommodate high volume production with greater uniformity and consistency. This continuous in-line process is well known in the art as disclosed in, for example, U.S. Pat. Nos. 3,122,114 and 3,696,503, both to Krengel et. al.; 3,468,145 to Ostrowski; and 3,667,095 to Ostrowski et. al., the disclosures of which are incorporated herein by reference. In particular, U.S. Pat. No. 3,122,114 disclosed the continuous formation of steel profiles and the galvanized treatment of the external surfaces of the formed profiles. U.S. Pat. No. 3,696,503 disclosed a method for continuously galvanizing strip steel in which a forming roll operation, a galvanizing section and a reforming roll operation were used to produce steel profile having all exposed surface areas of the strip steel galvanized. In U.S. Pat. No. 3,468,145, a method is disclosed for processing steel having a relatively thick cross-section and producing steel having a desired cross-section by moving the stock through a mill multiple times. U.S. Pat. No. 3,667,095 disclosed an apparatus for the continuous forming, galvanizing and application of a protective coating to steel profiles.
Generally, a continuous in-line process first forms strip steel into a desired profile having a cross-section configuration, for example, C-shaped, “U” shaped, etc. The particular steel profile is formed as straight pieces within a continuous in-line machine and cut to a desired length. If the cut steel profiles require a particular radius of curvature, the cut profile sections undergo a separate secondary process to form arched sections using, for example, a standard three roll bending machine. However, several drawbacks are associated with performing the arching process after cutting. First, this additional arching step of the formed and cut profile sections requires additional labor, separate process machines and consumes valuable process time. Secondly, if the steel profiles are produced with a plurality of equally spaced mounting holes along its longitudinal axis, the subsequent arching process may produce undesirable hole elongation along the bend radius area. Thirdly, warping may occur along the bend profile of the steel profile once sections are arched. Moreover, the cross-section at the end of the steel profile may change after the steel is bent. For example, a steel profile having a “U” shaped cross-section essentially comprises a pair of vertically opposed wall members connected by a lower transverse member. At each longitudinal (i.e. lengthwise) end portion of the steel profile, these vertically opposed wall members ideally have a common transverse plane. Once this “U” shaped profile is arched, one of the vertically opposed wall members extends beyond this transverse plane. An additional cutting step is required to ensure that each of the “U” shaped wall members ends on the same transverse plane. This adds labor, time and unwanted material waste to the manufacturing process. Thus, there is a need for a method and apparatus for manufacturing roll formed steel into a particular profile, arching the formed profile and cutting the arched profile all within a continuous in-line process.
SUMMARY OF THE INVENTIONExemplary embodiments of the present invention are directed to an apparatus and method for manufacturing arched metallic profiles, particularly steel profiles, using a continuous in-line process. The method includes forming the metallic profile; and arching the formed metallic profile in a continuous in-line process. The apparatus includes a roll forming station configured to receive flat metallic composition and output a given profile. An arching device is configured to receive the metallic profile and bend the metallic profile having a desired radius of curvature wherein a portion of the arching device is displaced with respect to the roll forming station vertically and/or horizontally.
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention, however, may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like numbers refer to like elements throughout.
The present invention is directed to a method and apparatus for manufacturing an arched or curved steel profile as part of a continuous in-line forming process. As such, the method roll forms a steel profile from strip steel and bends this formed steel profile during the continuous movement of the steel through the in-line process in a desired cross-section configuration. Applications of the present continuous in-line process include, for example manufacture of profiles for storage buildings, greenhouses, boat hulls, canopies, awnings, garages, ponds, swimming pool, structural enclosure elements, furniture, etc.
The step of bending or arching the steel profile includes utilizing Turkshead 202, Turkshead 204 and cutoff guide 206. The step of shearing or cutting 300 the bent steel profile is accomplished using, for example, a flying cutoff assembly 302. As will be described in more detail below with reference to
Once the steel has been formed into a desired profile, a pair of Turksheads 202 and 204 are disposed between the last roll forming stand 115N and the cutoff assembly 302. The Turksheads 202 and 204 define an arch forming device (200B of
Turksheads 202 and 204 may also be configured to be displaced angularly a distance in direction X off the central axis “A” formed by the roll forming stands 1151 . . . 115N in process line 10 as described in greater detail with reference to
The Turkshead 202 and/or 204 may also include a forming device 200B to provide support and/or restrain the desired profile in critical locations during the arching process. In particular, when the arching process engages the movement of Turkshead 204 while Turkshead 202 remains stationary, the stress on the profile about its bend point may compromise the integrity of the formed profile. Thus, a support guide or guide plate is used to alleviate these bend forces incident on the formed profile. For example, a guide plate or a Turkshead guide roll cut device has the corresponding shape of profile 111N undergoing the arching process and may be positioned within Turkshead 202. This device is used to support the steel profile during arching while avoiding damage to the given cross-section of the profile as it passes through the process line. In this manner, the forming device (200B) is positioned to best enhance the structural integrity of the steel profile and provides a stabilizing effect while the steel profile is being arched or bent. These forming devices may be provided in specified shapes, or contact along specified locations of the steel profile and are generally used in the formation of bends in open profiles, such as being shaped to fit in, and conform to, a given internal space within the steel profile. This forming device 200B may be separate from or incorporated into the Turkshead(s) to contribute to the forming of the prescribed curve while maintaining the desired profile. Alternatively, the forming device 200B may be part of or in juxtaposition to cutoff assembly 302 to contribute to the forming of the prescribed curve while maintaining the desired profile and to promote the unimpeded operation of the cutoff assembly 302. For example, a forming device may be used in bending a C-shape in conjunction with a Turkshead by providing a resistive force to pull against the inside of the C-shape during bending, e.g., having four rolls providing pressure on a side member of the steel profile to force it in a certain direction while minimizing wrinkles in the steel profile.
The degree of bend or arch within the steel profile is determined by the vertical and/or angular displacement of Turkshead 202 and/or Turkshead 204. Representative bends include, for example, arch ranges in radius from about 3 meters to about 24 meters. As seen in
During the in-line continuous process the arched steel profile is cut or severed by assembly 302 after the steel profile has been arched. This avoids drawbacks associated with prior methods where the steel profiles were first cut to length and then arched or bent to a desired radius of curvature pursuant to a secondary process. Accordingly, the method and apparatus of the present invention forms a bent steel profile product continuous in-line at high production rates. Representative production rates include, for example, from about 50 ft/min to about 500 ft/min, with rates of from about 60 ft/min to about 2040 ft/min preferred, and rates from about 60 ft/min to about 90 ft/min most preferred. Supports at the cutoff assembly may be located on the side rail to move the weight load of the steel profile off of the blade. Additionally, these supports may be used to push at the bottom or top of the steel profile to reduce twist, or increase the arch. Although steel profiles are preferred and referred to herein, other metallic compositions may be used in the formed profiles to be arched. For example, when aluminum profiles are manufactured, formed profiles may result from an extrusion process prior to being bent in the continuous in-line process. Other metals may be used, which are generally designed as specific functional components.
While the present invention has been disclosed with reference to certain embodiments, numerous modifications, alterations and changes to the described embodiments are possible without departing from the sphere and scope of the present invention, as defined in the appended claims. Accordingly, it is intended that the present invention not be limited to the described embodiments, but that it has the full scope defined by the language of the following claims, and equivalents thereof.
Claims
1. A method for manufacturing an arched metallic profile in a continuous in-line process comprising the steps of:
- forming the metallic profile; and,
- arching the formed metallic profile.
2. The method of claim 1, further comprising the step of stabilizing the steel profile.
3. The method of claim 2, wherein the step of stabilizing the steel profile is preformed in conjunction with a Turkshead.
4. The method of claim 2, wherein the step of stabilizing the steel profile is preformed in conjunction with a cutoff assembly.
5. The method of claim 1, further comprising the step of:
- forming holes within the strip steel prior to forming the steel profile.
6. The method of claim 1, wherein the metallic profile is selected from the group of a steel profile, and aluminum profile, and combinations thereof.
7. The method of claim 6, wherein the step of forming the metallic profile includes the step of:
- forming a steel profile from a strip steel in a continuous roll forming process.
8. The method of claim 6, wherein the bent formed steel profile forms multiple arches.
9. The method of claim 6, wherein the bent formed steel profile forms multiple arches within two or more distinct planes.
10. The method of claim 9, wherein the bent formed steel profile forms different arches in the same direction.
11. The method of claim 9, wherein the bent formed steel profile forms different arches in different directions.
12. The method of claim 1, further comprising the step of:
- cutting the bent steel profile within the in-line continuous process.
13. An apparatus for bending metallic profiles within a continuous in-line process comprising:
- a roll forming station configured to receive flat metallic composition and output a given profile; and
- an arching device configured to receive said metallic profile and bend the metallic profile having a desired radius of curvature wherein a portion of said arching device is displaced with respect to said roll forming station.
14. The apparatus for bending metallic profiles of claim 13 wherein said roll forming station comprises a plurality of roll stations, each of said roll stations including rollers configured to receive the metallic composition and successively bend the composition into the given profile.
15. The apparatus for bending metallic profiles of claim 13 wherein said arching device comprises at least one Turkshead.
16. The apparatus for bending metallic profiles of claim 13 further comprising a cutting assembly configured to receive said arched profile and cut said profile into particular lengths.
17. The apparatus for bending metallic profiles of claim 15 further comprising a support guide disposed within said Turkshead about which said metallic profile is arched.
18. The apparatus for bending metallic profiles of claim 13 wherein said arching device is displaced linearly with respect to said roll forming station.
19. The apparatus for bending metallic profiles of claim 13 wherein said arching device is displaced angularly with respect to said roll forming station.
20. The apparatus for bending metallic profiles of claim 15 wherein said Turkshead is a first Turkshead, said arching device further comprising a second Turkshead disposed between said first Turkshead and said roll forming station.
21. The apparatus for bending metallic profile of claim 20 wherein said second Turkshead includes an insert roller device corresponding to a shape of said profile, said insert roller device configured to equalize a longitudinal stress incident on the profile during arching.
Type: Application
Filed: Dec 12, 2008
Publication Date: May 31, 2012
Applicant: ALLIED TUBE & CONDUIT CORPORATION (Harvey, IL)
Inventors: Jack Curless (Peoria, AZ), William Smyth (Harlingen, TX), John Martinez (Glendale, AZ), Dan Nelson (Brookfield, CT), William Cromer (Phoenix, AZ), Theodore Thomas Wilk (Phoenix, AZ)
Application Number: 12/811,593
International Classification: B21B 1/08 (20060101); B21D 43/28 (20060101); B21D 31/00 (20060101);