Adjustable diameter spindle uncoiler apparatus for uncoiling wound sheet metal webs
An uncoiler apparatus for uncoiling coils of wound sheet metal web material is provided with a spindle having an adjustable diameter. An inflatable member is wound about the spindle, and covered with a thin expansible coil. Upon positioning of a coil of wound sheet metal web material over the spindle, the inflatable member is inflated, and the expansible coil expands to engage the inner surface of the inner diameter of the coil of wound sheet metal web material. In an embodiment of the invention, the uncoiler apparatus is capable of being moved, in the direction of the axis of the spindle, and structures are provided for resisting static and dynamic pivoting moments imposed on the uncoiler by the weight and rotational mass inertia (acceleration/deceleration) of the coil.
Not Applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENTNot Applicable.
REFERENCE TO A “MICROFICHE APPENDIX”Not Applicable.
BACKGROUND OF THE DISCLOSURE1. The Technical Field
The present invention relates to apparatus for the handling, paying out, coiling and/or uncoiling of wound sheet metal webs and methods for uncoiling wound sheet metal webs using such apparatus.
2. The Prior Art
In order to facilitate the handling and transportation of flat strip sheet metal material, continuous sheet metal webs are typically wound into coils, after having been cast in a continuous casting process. Typically, after slitting, the metal web has a width which is several multiples of the widths of the sheet metal strips that are used in the ultimate fabrication processes to which the sheet metal strips are subjected. The individual strips, into which a whole- or half-width coil is cut, are often called “mults” in the art, in particular when the several mults are still arranged side-by-side as a unit.
When the wound metal webs are delivered to a fabricator, the metal web must be unwound before any further fabrication processes can be applied to it.
Accordingly, mechanisms have been developed for rotatably supporting a coil of wound sheet metal web material, as it is unwound and straightened, during the process of being fed to downstream fabrication devices.
SUMMARY OF THE INVENTIONThe present invention comprises, at least in part, an apparatus for supporting, handling and uncoiling at least one coil of wound sheet metal web material. The uncoiler apparatus includes a base; a frame, cooperatively associated with the base; and a spindle structure, rotatably retractably supported by the frame, and operably configured to receive, and grippingly and rotatably support a coil of wound sheet metal web material.
The spindle structure may include a spindle shaft, having an inner portion rotatably mounted in the frame, and an outer portion configured to receive and support a coil of wound sheet metal web material. The outer portion of the spindle shaft may include a coil gripping mechanism, with an inflatable hose helically wrapped around the spindle shaft, and a resilient expansible gripping member, surrounding the hose, and wrapping around the spindle shaft for an arc length of greater than one circumference of the spindle shaft. The coil gripping mechanism may be operably configured so that upon positioning of a coil of wound sheet metal web material over the outer portion of the spindle shaft, inflation of the hose causes expansion of the resilient coil to grippingly bear against an inner diameter of the positioned coil of wound sheet metal web material.
The frame may be configured for reciprocating lateral movement, parallel to a longitudinal axis of the spindle shaft, relative to the base.
The uncoiler apparatus may further comprise a roller support mechanism operably disposed between the base and the frame, including front and back roller support structures, formed from interlocking plates, disposed on the stationary base and movable frame, having trapped between them rolling elements. The interlocking plates and rolling elements are arranged in such a fashion that are capable of withstanding compression and separation forces acting upon them.
The uncoiler apparatus may further comprise a propulsion mechanism for selectively moving the frame relative to the base.
A hydraulic motor/pump is, in an embodiment of the invention, provided to impart rotational force to the spindle shaft. In drive mode, the motor threads-up the coil leading edge toward the subsequent processing apparatus, and in pump mode provides the web back tension.
The spindle shaft, in an embodiment of the invention, is rotatably supported, at a medial position there along, by a spindle shaft center bearing set. The spindle shaft center bearing set, in an embodiment of the invention, comprises at least three cam follower members disposed at circumferentially spaced apart locations about the spindle shaft, and mounted on eccentric adjustment shafts.
The uncoiler apparatus may further comprise a passageway extending through the spindle shaft, and operably connected to an end of the inflatable hose proximate an outermost end of the spindle shaft. A rotatable fitting may be disposed on an innermost end of the spindle shaft, in communication with the passageway. A selectively actuable source of pressurized fluid/air may be connected to the fitting.
The uncoiler apparatus may further comprise retention structures operably associated with the roller support mechanism, for resisting the overturning moments imposed on the uncoiler apparatus when a coil of wound sheet metal web material is loaded onto the spindle shaft. The retention structures may comprise one or more roller engagement members disposed on each of the at least one base and frame inboard support plates, wherein the one or more roller engagement members associated with the at least one frame inboard support plate extend below the at least one roller member associated therewith, and the one or more roller engagement members associated with the at least one base inboard support plate extend above the at least one roller member associated therewith, to prevent separation of the at least one base and frame inboard support plates, as a result of downwardly directed forces imposed on the spindle shaft by the weight of a coil of wound sheet metal web material placed thereon.
The uncoiler apparatus may further comprise an adjustable hold-down mechanism, for guiding a web of sheet material, subsequent to being peeled off of a coil of wound sheet metal web material. The adjustable hold-down mechanism may further comprise an extensible boom disposed adjacent to the outer portion of the spindle shaft, and extending transversely to the spindle shaft. A horizontal support member may be operably associated with the extensible boom, and extending parallel to the spindle shaft. A powered contact roll may be supported on the horizontal support member and configured for engaging in frictional contact with a web of sheet material, subsequent to being peeled off of a coil of wound sheet metal web material.
While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail, a preferred embodiment with the understanding that the present disclosure should be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment so illustrated.
To the extent that any measurements or other numerical values are described herein or illustrated in the Figures, they are provided for illustrative purposes only, and the invention is not intended to be limited thereby.
Spindle apparatus 10, while presently contemplated as being suited for use in slitting, roll-forming fabrication lines, is also believed to be adaptable for use in other applications, such as cut-to-length stamping operations, etc., by those of ordinary skill in the art, without departing from the scope of the present invention.
Referring generally to
Roller support structure 16 is shown in further detail in
Referring back to
Propulsion unit 24 may be any suitable powered linear actuator, such as a motor driven ballscrew or pneumatic/hydraulic cylinder and piston combination, interconnected between base 12 and frame 26, such that, when actuated by a suitable control mechanism (not shown), frame 26 may be made to move along the direction of the longitudinal axis X-X of spindle 27.
In an alternative, simplified embodiment (not shown) of uncoiler apparatus 10, traverse mechanism 14 and propulsion unit 24 may be omitted, and spindle 27 may be simply fixedly mounted relative to base 12.
Returning to
In order to provide rotational motive force to spindle 27 (see
Mandrel 42 (
When the hose 48 is inflated, the pressure caused thereby results in the hose 48 expanding outwardly against the inside surface of the overlying gripping member 50, which, in turn, unwinds slightly. See
As reflected in
Spindle apparatus 10 further includes a hold-down mechanism 60, as shown in
In practice, a coil 52, being carried by a movable cradle (not shown), is pushed over the spindle, when hose 48 is deflated. Once the coil 52 has been pushed sufficiently onto spindle 27, hose 48 is inflated, causing gripping member 50 to expand, and engage the inside surface of the aperture of the coil 52. The cradle (not shown) can then be lowered, and moved away from the spindle apparatus. Hold-down mechanism 60 will be lowered to position II of
Once the leading edge of the coil 52 has been successfully threaded through the downstream devices, the downstream devices will grip and pull upon the uncoiling web. Hold-down mechanism 60 will be raised away from the surface of the uncoiling web, and the role of motor/pump 34 will be switched, in that it will thereafter be driven by the uncoiling web, as the web exerts a pull, causing the rotating remainder of coil 52 to, in turn, force spindle 27 to rotate. In this mode, motor/pump 34 will be acting as a brake (through the resistance of the hydraulic fluid being pumped), and will serve to maintain desired back tension on the uncoiling web of metal.
In an embodiment of the invention, the driven roller 72 (see
When a coil 52 to be uncoiled has a width which is substantially equal to, or even slightly greater than the length of outer spindle shaft 46, all of the width of gripping member 50 engages the interior diameter of coil 52. However, when coil 52 has a width which is less than the width of gripping member 50, in order to prevent distortion and possible plastic deformation of gripping member 50, in the vicinity of the inner and/or outer ends of coil 52, uncoiler 10 may be suitably provided with a control to modulate the pressure of the fluid used to inflate hose 48, so as to reduce the outward pressure exerted by hose 48 onto gripping member 50.
It is believed that the adjustable diameter spindle construction of the present invention provides for a more distributed application of force to the inner surface of the inner diameter of a coil of wound sheet metal web material, so as to avoid localized pressure points, which may result in damage to the sheet metal web material. Furthermore, by distributing the contact surface area about the entire circumference of the spindle, increased frictional forces are created, resulting in the spindle having a greater “grip” on the coil.
The foregoing description and drawings merely explain and illustrate the invention, and the invention is not so limited as those skilled in the art who have the disclosure before them will be able to make modifications and variations therein without departing from the scope of the invention.
Claims
1. An apparatus for supporting, handling and uncoiling at least one coil of wound sheet metal web material, comprising:
- a base;
- a frame, cooperatively associated with the base; and
- a spindle structure, rotatably retractably supported by the frame, and operably configured to receive, and grippingly and rotatably support a coil of wound sheet metal web material,
- the spindle structure including a spindle shaft, having an inner portion rotatably mounted in the frame, and an outer portion configured to receive and support a coil of wound sheet metal web material,
- the outer portion including a coil gripping mechanism, with an inflatable hose helically wrapped around the spindle shaft, and a resilient expansible gripping member, surrounding the hose, and wrapping around the spindle shaft for an arc length of greater than one circumference of the spindle shaft;
- the coil gripping mechanism being operably configured so that upon positioning of a coil of wound sheet metal web material over the outer portion of the spindle shaft, inflation of the hose causes expansion of the resilient expansible gripping member to grippingly bear against an inner diameter of the positioned coil of wound sheet metal web material.
2. The uncoiler apparatus according to claim 1, wherein the frame is configured for reciprocating lateral movement, parallel to a longitudinal axis of the spindle shaft, relative to the base.
3. The uncoiler apparatus according to claim 2, wherein the uncoiler apparatus further comprises a roller support mechanism operably disposed between the base and the frame.
4. The uncoiler apparatus according to claim 3, wherein the roller support mechanism comprises:
- at least one inboard support plate disposed on the base, proximate an innermost end of the spindle shaft;
- at least one outboard support plate disposed on the base, proximate a medial region of the spindle shaft;
- at least one inboard support plate disposed on the frame, proximate an innermost end of the spindle shaft, and aligned with the at least one inboard support plate on the base;
- at least one outboard support plate disposed on the frame, proximate a medial region of the spindle shaft, and aligned with the at least one outboard support plate on the base; and
- at least one roller member disposed between each of the aligned at least one inboard base and frame support plates, and the aligned at least one outboard base and support frames, respectively.
5. The uncoiler apparatus according to claim 2, further comprising a propulsion mechanism for selectively moving the frame relative to the base.
6. The uncoiler apparatus according to claim 1, further comprising a hydraulic motor/pump for providing driving/braking torque to the spindle shaft.
7. The uncoiler apparatus according to the claim 1 wherein the spindle shaft is rotatably supported, at a medial position there along, by a spindle shaft center bearing set.
8. The uncoiler apparatus according to claim 7, wherein the spindle shaft center bearing set comprises at least three cam follower members disposed at circumferentially spaced apart locations about the spindle shaft, and mounted on eccentric adjustment shafts.
9. The uncoiler apparatus according to claim 1, further comprising:
- a passageway extending through the spindle shaft, and operably connected to an end of the inflatable hose proximate an outermost end of the spindle shaft;
- a rotatable fitting, disposed on an innermost end of the spindle shaft, in communication with the passageway;
- a selectively actuable source of pressurized fluid/air, connected to the fitting.
10. The uncoiler apparatus according to claim 4, further comprising retention structures operably associated with the roller support mechanism, for resisting compression/separation forces and overturning moments imposed on the uncoiler apparatus when a coil of wound sheet metal web material is loaded onto the spindle shaft.
11. The uncoiler apparatus according to claim 10, wherein the retention structures comprise one or more roller engagement members disposed on each of the at least one base and frame inboard support plates, wherein the one or more roller engagement members associated with the at least one frame inboard support plate extend below the at least one roller member associated therewith, and the one or more roller engagement members associated with the at least one base inboard support plate extend above the at least one roller member associated therewith, to prevent separation of the at least one base and frame inboard support plates, as a result of downwardly directed forces imposed on the spindle shaft by the weight of a coil of wound sheet metal web material placed thereon.
12. The uncoiler apparatus according to claim 1 further comprising an adjustable hold-down mechanism, for guiding a web of sheet material, subsequent to being peeled off of a coil of wound sheet metal web material.
13. The uncoiler apparatus according to claim 12, wherein the adjustable hold-down mechanism comprises:
- an extensible boom disposed adjacent to the outer portion of the spindle shaft, and extending transversely to the spindle shaft;
- a horizontal support member, operably associated with the extensible boom, and extending parallel to the spindle shaft; and
- a powered contact roll, supported on the horizontal support member, configured for engaging in frictional contact with a web of sheet material, subsequent to being peeled off of a coil of wound sheet metal web material.
Type: Application
Filed: Oct 18, 2007
Publication Date: Apr 23, 2009
Inventors: Tadeusz Marecki (Chicago, IL), Wanda Braner (Jupiter, FL)
Application Number: 11/975,322
International Classification: B65H 19/12 (20060101);