Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1982-03-23
1984-12-18
Levy, Stuart S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
226187, 226190, B21C 4702, B65H 1720
Patent
active
044886888
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to metallurgical production of hardware and, more specifically, to coiling apparatus for long-size products.
BACKGROUND ART
At the present time, improvement of industrial manufacture of long-size products is not possible without modification of the equipment serving for multihole drawing and coiling that would provide for fabrication of long-size products with residual stresses distributed symmetrically relative to the axis thereof, and, hence, for improvement of the fatigue life thereof. It is likely that most promising in this respect is a coiling apparatus designed for rectilinear drawing of the long-sized product coiled in such a manner that the moment of forces acting upon the product in a drawing-bending process should not exceed a certain critical value whereat a bending plastic strain begins.
However, the prior-art coilers widely in use do not preclude plastic bending of the long-size product during the drawing-bending process.
The coilers of the above-mentioned design are difficult to manufacture and labor-consuming in handling.
In addition, the prior-art coiling apparatus cannot provide for even drawing of the long-size product, with heavy vibration and operating instability occurring when a drawing speed of more than 60 to 70 m/min is reached, with the result that malfunctions are rather frequent.
Also known in the art is a coiling apparatus for long-size products (cf., U.S. Pat. No. 3,587,993, Cl. 242-80, dated July 10, 1971) comprising an assembly for drawing long-sized products and an assembly for coiling long-size products that are disposed separately in the direction of movement of the long-size products. In said apparatus, the assembly for drawing the long-size products comprises two rigidly-coupled shafts wherebetween the long-size product is passed.
The coiling apparatus of the foregoing design draws the long-size product by compressing it with the rolls thereof, with the result that the long-size product experiences plastic strains.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide a coiling apparatus for long-size products, the construction of the assembly for drawing long-size products whereof will permit precluding plastic strains of the long-size products.
This object is accomplished in a coiling apparatus for long-size products comprising an assembly for drawing long-size products and an assembly for coiling long-size products disposed separately in the direction of movement of the long-size products, wherein, according to the invention, the assembly for drawing the long-size products incorporates at least one drive shaft and at least one spring-loaded roll wherebetween the long-size product is moved, and also comprises a fork carrying the spring-loaded roll, and a guide rack wherein the fork is inserted.
It is preferable that the drive shaft should be provided with principal flutes shaped identically to the long-size product, with the flute depth exceeding 1/2 of the long-size product thickness, and with the number of the flutes equal to the number of the spring-loaded rolls.
It is expedient that for drawing two long-size products pressed against the drive shaft with one spring-loaded roll, the drive shaft should be furnished with auxiliary flutes shaped identically to the long-size product, with the depth thereof exceeding 1/2 of the long-size product thickness, and with the number thereof equal to the number of the principal flutes.
For prolonging fatigue life, it is furthermore expedient that the drive shaft should carry a set of rings, the number whereof is equal to the number of spring-loaded rolls, with the surface of each ring provided with a principal flute shaped identically to the long-size product and having a depth exceeding 1/2 of the long-size product thickness.
For drawing two long-size products pressed against the ring by one spring-loaded roll, it is preferable that the surface of each ring be provided with an auxiliary flute shaped identically to the long-size product and having a
REFERENCES:
patent: 2292851 (1942-08-01), Tykal
patent: 2668615 (1954-02-01), Sampatacos
patent: 2704794 (1955-03-01), Hanson
patent: 3119536 (1964-01-01), Berkeley
patent: 3550830 (1970-12-01), Lagogue
patent: 3587993 (1971-06-01), Tradler
patent: 3674194 (1972-07-01), Moesser
patent: 3675837 (1972-07-01), Gerould
patent: 4043494 (1977-08-01), Bickford et al.
Denisov Petr I.
Fomin Georgy M.
Petrov Pavel E.
Polyakov Mikhail G.
Pomelnikov Petr P.
Levy Stuart S.
Vsesojuzny Nauchno-Issledovatelsky Institut Metiznoi Promyshlenn
Werner David
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