Winding – tensioning – or guiding – Strand guide – Oscillatable or reciprocable
Reexamination Certificate
1999-11-02
2001-12-25
Mansen, Michael R. (Department: 3653)
Winding, tensioning, or guiding
Strand guide
Oscillatable or reciprocable
C242S447200, C242S483300, C072S144000
Reexamination Certificate
active
06332583
ABSTRACT:
FIELD OF THE INVENTION
This invention concerns a device to form spirals in a coiling machine for rolled stock, such as bars, plate, or rods (smooth or ribbed) of hot-rolled metal material, with a cross-section either round, square, rectangular, hexagonal or otherwise.
To be more exact, the invention concerns a device to guide the formation of the spirals of a coil of rolled stock, wherein each coil consists of a plurality of super-imposed and coaxial layers of helical spirals.
BACKGROUND OF THE INVENTION
The state of the art includes a device to form spirals wherein a curved element is arranged inside a containing cylinder, in which the spirals are formed and accumulate, and is kept substantially parallel to the inner surface of the containing cylinder.
In this device, while the containing cylinder is made to rotate, the curved element is made to gradually advance, parallel to the axis of rotation of the cylinder, and is removed from inside the coil when the latter has been completed.
Although this device facilitates the formation of the spirals of the coil, it does not ensure that a compact coil is formed, since the reciprocal movement of the spiralforming tool and the containing cylinder is quite uncontrolled and since the stock which is being coiled is not subjected to a controlled tension.
The U.S. Pat. No. 4,664,329 discloses a coiler to wind a wire around a central mandrel which is rotated by means of a belt contacting the mandrel outer surface and disposed around a plurality of pulleys, one of which is connected to a motor. In this device the wire to be wound is horizontally moved by a first traverse assembly mounted slidable on fixed bars parallel to the rotational axis of the mandrel and is vertically moved by a plate connected to an actuator and independent from the traverse assembly. On such a plate is also mounted one of the pulleys which control the movement of the belt. This device has the disadvantage that the wire to be wound arrives in the proximity of the mandrel not always perpendicular to the rotational axis of the mandrel, but with an inclination which is more or less accentuated in accordance with the position of the traverse assembly with respect to the mandrel; consequently the different coils on a same layer are not uniformly distributed.
The present applicant has designed, tested and embodied this invention to overcome the shortcomings of the state of the art and to obtain further advantages.
SUMMARY OF THE INVENTION
The device to form spirals in a coiling machine for rolled stock according to the invention is set forth and characterised in the main claim, while the dependent claims describe other characteristics of the invention.
The main purpose of the invention is to provide a device to form the spirals in a coiling machine for rolled stock, wherein the formation of the spirals is constantly controlled and wherein each spiral is at a pre-set distance from the adjacent spiral, so that the packing of the coil can also be pre-set.
In accordance with this purpose, the device to form the spirals in a coiling machine for rolled stock according to the invention comprises a guide element suitable to guide the rolled stock in a segment between the drawing rollers in a rolling train located upstream of the coiling machine, which comprises a reel rotating around its own axis of rotation. To be more exact, the device according to the invention is provided with first translating means which are suitable to cooperate with the guide element to displace at least one end of the latter in a direction substantially parallel to the axis of rotation of the reel of the coiling machine.
A second purpose of the invention is to provide a device to form the spirals in a coiling machine for rolled stock which will hold the rolled stock under tension and will control the resistant traction of each rolled product while it is being coiled.
A third purpose of the invention is to provide a device to form the spirals in a coiling machine for rolled stock which will allow to process rolled stock of metallic material of any type, such as bars, plate, or rods (smooth or ribbed), with a cross section of any shape: round, square, rectangular, hexagonal or otherwise; and with diameters of between 8 and 52 mm or, in the case of bars or plate, with a section of between 60 mm
2
(for example, 20 mm by 3 mm) and 1400 mm
2
(for example, 70 mm by 20 mm), without there being any particular wear on the guide organs suitable to distribute the spirals on the coiling machine.
A further purpose of the invention is to provide a device to form the spirals in a coiling machine for rolled stock travelling at very high speeds, more than 40 metres per second and wherein the distribution of the spirals of the coil will be guided in a transverse direction as well, that is to say, ring after ring or layer after layer, so as to obtain a compact coil.
REFERENCES:
patent: 1797331 (1931-03-01), Dale
patent: 3589641 (1971-06-01), Lawrence
patent: 3815846 (1974-06-01), Biewer
patent: 3833184 (1974-09-01), Hara et al.
patent: 4421284 (1983-12-01), Pan
patent: 4592521 (1986-06-01), Hallikas
patent: 4664329 (1987-05-01), Pali
patent: 4756489 (1988-07-01), De Varennes
patent: 0821666 (1951-11-01), None
patent: 0226547 (1987-06-01), None
patent: 2 058 703 (1981-04-01), None
Patent Abstracts of Japan, vol. 14, No. 196, Apr. 20, 1990 for JP 2037913, published Feb. 07, 1990.
Bordignon Giuseppe
De Luca Andrea
Poloni Alfredo
Danieli & C. Officine Meccaniche SpA
Mansen Michael R.
Stevens Davis Miller & Mosher LLP
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