US2257760A - Formation of metal coils - Google Patents

Description

Oct. 7, 1941. 5 R 2,257,760

FORMATION OF METAL QCOILS Filed July 12 1939 s Sheets-Sheet 1 33% flaw/ a Oct. 7, 1941. ;'s. NY ERG FORMATION OF METAL COILS Filed July 12, 1939 3 Sheets-Slfeet 2 Oct. 7, 1941. NYBERG 2,257,760

FORMATION OF METAL 'COILS I Filed July 12, 1939 s sheets-sheet z (Kai/o 0 o 137/0 0 o o o {60 6 00 00:00 a0 a0 00 as 00 00 01/35 7 0. '0 0 L 57% Q, g 0

Patented Oct. 7, 1941 2,257,760 FORMATION OF METAL COILS Stone Nyberg, Dover, Ohio, assignor to Agnes J.

Reeves Greer, Morgantown, W. Va.

Application July 12, 1939, Serial No. 284,058 Claims. (01. 153-4) The invention relates to the coiling of metal coils preparatory to pickling the coils and is especially adapted for properly preparing the coils for pickling in pickling machines of the general type disclosed in Greer Patent No. 2,091,921, issued August 31, 1937; Shoemaker Patent No. 2,120,843, issued June 14, 1938; and Greer application Serial No. 249,484 filed January 5, 1939, now Patent No. 2,196,210, issued April 9, 1940; and the present invention pertains to the method and apparatus for forming the coils and to the coils thus formed.

The general type of pickling machines above referred to diifer from the continuous strip pickling machines in which the metal is uncoiled and passed through the pickling machine in strip form, in that the pickling machines referred to provide means for pickling the coil without uncoiling the same, this being accomplished by supporting the coils upon mandrels which suspend the coils in the pickling and washing solutions, the mandrels being rotated in order to rotate the coils within the solutions.

For this purpose it is necessary that the convolutions of the coils be opened up or separated while in the pickling bath so that none of the convolutions will remain in contact with each other in the bath, thus giving the pickling acid free access to every portion of the surfaces of the metal, as otherwise the pickled metal will be marred by black spots or marks where the acid has not had access to the surface of the metal.

In the patents and application above referred to the coil shown is a conventional spiral comprising a continuous curve from the center to the outside of the coil. This frequently results in two of the convolutions of a coil contacting with each other for some distance while the coil is in the pickling solution, thus, preventing the acid from properly contacting the opposed surfaces of these convolutions of the coil and resulting in an improperly pickled coil having black spots upon the surfaces which are thus not properly exposed to the action of the acid. S

Greer Patent No. 2,191,463 for Method and apparatus for recoiling metal coils, dated February 2'7, 1940, discloses a method and apparatus for forming coils having projections in the form of angular bends in the convolutions of the coil to keep the same properly spaced or separated while in the pickling solution, and has been found to work entirely satisfactorily in use for pickling in machines such as the above mentioned patents.

The present invention is in the nature of an improvement upon or addition to the disclosure in said Greer Patent No. 2,191,463 and contemplates the formation of a coil having projections in the form of buttons or ribs formed in the convolutions 'of the coil to hold the same separated or spaced'from each other, and this invention is applicable not only to coils to be pickled in machines such as the above mentioned patents, but may also be used for separating the convolutions of the coil to be pickled by the old method which is still in use in many small plants, wherein the convolutions of the coil are separated by short bent rods or hairpins, as they are familiarly called, which are inserted between convolutions of the coil which is then placed on end in a tub or tank in which either the coil or pickling acid is agitated.

One object of the invention is to provide a new method and apparatus for forming a metal coil of such shape that none of the convolutions of the coil will remain in contact with each other.

- Another object is to v provide for the formation of a coil of continuous spiral form excepting for slight projections in the form of buttons or ribs formed around each convolution to space adjacent convolutions therefrom.

A further object is the provision of such a coil in which -the projections may be irregu- -larly spaced around each convolution thereof.

A still further object is the provision of such a coil in which the projections may be oppositely disposed and uniformly spaced throughout the length of the metal strip forming the coil whereby when the coil is suspended upon a mandrel the uniformly spaced, oppositely disposed projections in the convolutions above the mandrel will cooperate with each other in the manner of gear teeth so as to prevent each convolution of the coil from moving relative to adjacent convolutions whereby the convolutions will be prevented from winding or tightening up.

,Another object is the provision 'ofmeans for forming the projections in a metal strip and then winding the formed strip into a substantially spiral coil.

A still further object is the provision of a machine for forming the projections in the coil with means for adjusting the machine so as to provide projections of any desired shape 'in any desired position upon'the coil.

The above objects together with others which will be apparent from the drawings and following description, or which may be later referred of the coil to may be attained in the manner illustrated in the accompanying drawings in which- Figure 1 is a sectional elevation of a machine for forming projections upon a coil in the manner above stated in general terms;

. Fig. 2, a front elevation of the machine shown in Fig. 1;

Fig. 3, a detail perspective view of a portion of one of the rolls of the machine showing the manner of connecting the die blocks thereto;

Fig. 4, an elevation of a coil formed in accordance with the invention showing the same suspended upon a mandrel;

Fig. 5, a view similar to Fig. 4 showing a different form of projections upon the coils;

Fig. 6, a plan view of a portion of an uncoiled strip with projections thereon such as shown in the coil of Fig. 4;

Fig. 7, a similar view showing projections such as shown in the coil of Fig. 5;

Fig. 8, a similar view showing projections at opposite side edges of the strip;

Fig. 9, a similar view showing the projections in the form of buttons staggered alternately across the strip;

Fig. 10 asimilar view showing the projections in the form of short ribs staggered across the strip; and

Fig. 11 a similar view showing the projections in the form of ribs extending transversely across the strip;

Similar numerals refer to throughout the several views.

The metal coil to be recoiled for pickling in accordance with the'present invention is uncoiled and may be fed through a machine such as illustrated in Figs. 1 and 2 for forming projections upon the metal and recoiling the same, the projections spacing apart the several convolutions of the coil.

The machine .may include spaced housings l within which are journaled a-lower roll II and a cooperating, vertical, adjustable upper roll l2.

These rolls are provided with complemental projections and recesses around their exteriors for the purpose of forming the projectionsin the metal coil.

In order that projections of any desired shape or kind may be formed in the coil either through the center thereof or near or at the edges or in various other arrangements, these projections and recesses upon the rolls may be formed upon removable'die blocks 13 adapted to be adjustsimilar parts ably mounted in longitudinal grooves I 4 provided in the rolls.

As shown in the drawings each of these die blocks may be of dove-tail shape so as to fit the correspondingly inclined side wall l5 of the groove at one side and the correspondingly shaped side wall l6 of the clamping and retaining strip I! on the other side.

The abutting sides of the die block and strip ll may be serrated as at l8 so as to hold each die block tightly clamped in any desired adjusted position when the screws I9 are located through the strip I1 and into the roll as best shown in Fig. 3.

The metal may be fed to the rolls I2 by means of a pair of feedrOlIs 20 and for the purpose of breaking or loosening any scale which may be present upon the surfaces of the metal a vertically adjustable roll 2| may cooperate with the feed rolls 20.

In order that the upper roll l2 may be vertically adjusted relat to the lower roll 20 to accommodate varying thicknesses of metal, these rolls may be geared together in the manner shown in Fig. 2 in which shafts 22 may be connected as by universal joints 23 to the spin- I Fig. '2 for producing substantially button-like projections 3| at irregularity spaced intervals throughout the center of the metal 32 in the manner indicated in Fig. 6. It should be understood that the dies may be arranged to place these button-like projections at uniformly spaced intervals throughout the center of the strip, if desired, or by properly positioning two die blocks in each groove ll of the rolls H and I2, these projections may be formed near opposite edges of the metal strip and may be either irregularly or uniformly spaced as desired.

In Fig. '7 is shown a portion of a. metal strip in which the projections are oppositely disposed as at 33 and 34 so that when the metal is recoiled to form a coil as indicated generally at 35 in Fig. 5 the oppositely disposed projections 33 and 34 will be arranged throughout the convolutions of the coil in the manner illustrated in said figure.

In Fig. 8 is shown the manner in which substantially half-round projections 36 may be formed in opposite edges of the metal strip and these projections may be either uniformly or irregularly spaced, as desired.

Fig. 9 shows another arrangement of the button-like projections 3| located in staggered arrangement across the metal strip, and Fig. 10

shows a similar arrangement of slightly elongated or rib-like projections 31.

If desired, the projections may be in the form of ribs 38 extending entirely across the strip.

As the projections are formed in the metal strip the same is wound into a substantially spiral coil upon the drum 39, the projections being located around each convolution of the coil thus formed spacing the convolutions apart.

The drum 39 may be jourhaled in a suitable bearing upon the standard 43, from which radiate several spokes 44 to the outer portions of which is connected a concentric semi-cylindric guard plate 45, at one end of which is located the hooked stop 40. I

If desired, the coil may be opened up to any desired extent by engaging the loose outer end thereof in the stop 40 and rotating the coiling drum 39 in reverse direction until the desired result is obtained.

It will be obvious that upon this reverse rotation of the drum the curved plate 45 will guide the outer end of the coil onto the stop 40, which will hold the outer end of the coil against movement as the drum is rotated in reverse direction, and the guard plate will cooperate with the stop to limit the expanding movement of the outside of the coil while the reverse rotation of the drum will open up the convolutions of the coil so that they will be separated from each other whereby relative movement between adjacent convolutions of the coil will be obtained.

The coil thus produced may then be placed upon a mandrel, indicated generally at H in means for passing a metal strip Fig. 4, in such position that the coil is suspended within a pickling tank 42 and the mandrel may be rotated by any suitable means for rotating the coil around the same.

The projections 3| upon each convolution of the coil will thus prevent the several convolutions from contacting with each other while in the pickling solution, thus, permitting free access of the pickling acid to the entire surfaceof the coil. Should any of the projections 3| contact with the surfaces of the adjacent convolutions of the coil, due to the tightening of the convolutions caused by rotation upon the mandrel this will not prevent the pickling solution from contacting the surface of the coil at these points, since the rotation of the coil around the mandrel causes a continual movement of the convolutions of the coil relative to each other and these slight points of contact are continuously changing their positions.

The type of oppositely and 34 shown in Figs. 5 and 'I is especially designed to prevent any considerable winding movement or tightening of the convolutions of the coil relative to each other.

As illustrated in Fig. 5 this is accomplished by the oppositely disposed projections of the different convolutions engaging each other in the portion of the coil above the mandrel. The action is somewhat similar to a plurality of ring gears, the downwardly disposed projections-34 of each convolution having only in either direction between the upwardly disposed projections 33 of the next adjacent convolution.

According to the provisions of the patent statutes I have explained the principle of my inventionand described one embodiment thereof, but I desire to have it understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically illustrated and described, the invention residing in the formation of projections in the convolutions of the coil to hold the convolutions spaced from each other in the pickling solution, regardlessof whether these projections are of the particular conformation of the projections illustrated and 1.'\Means for forming a coil of metal and separating the convolutions oi the coil, comprising a pair or cooperating rolls, projections on one roll and corresponding depressions in the other roll, through said rolls so as to form projections thereon, a drum located beyond said rolls and having means for receiving the leading end of-. the metal strip, means for rotating the drum in one direction for coiling the metal thereon to Iorm'a coil the convolutions of which have spaced projections therein, means for rotating the drum in the opposite direction and means comprising a concentric guard plate and a stop adjacent to the drum for engaging and holding the outer end of the coil against movement and producing relative movement between adjacent convolutions of coil to disposed projections 33 a slight movement separate the convolutions so that the projections of adjacent convolutions will be spaced from each other.

2. Means for forming a coil of metal and separating the convolutions of the coil, comprising a pair of cooperating rolls, projections on one roll and corresponding depressions in the other roll, means for passing a metal strip through said rolls so as to form irregularly spaced projections thereon, a drum located beyond said rolls and having means for receiving the leading end of the metal strip, means for rotating the drum in one direction for coiling the metal thereon to form a coil the convolutions of which have spaced projections therein, means for rotating the drum in the opposite direction and means comprising a concentric guard plate and a stop adjacent to the drum for engaging and holding the outer end of the coil against movement and producing relative movement between adjacent convolutions of coil to separate the convolutions so that the projections of adjacent convolutions will be spaced from each other.

3. Means for forming a coil of metal and separating the convolutions of the coil, comprising a .pair of cooperating rolls, projections on one roll and corresponding depressions in the other roll, means for passing a metal strip through said rolls so as to form projections upon the central portion only thereof, a drum located beyond said rolls and having means for receiving the leading end of the metal strip, means for rotating the drum in one direction for coiling the metal thereon to form a coil the convolutions of which have spaced projections therein, means for rotating the drum in the opposite direction and means comprising a concentric guard plate and a stop adjacent to the drum for engaging and holding the outer' end of the coil againstmovement and producing relative movement between adjacent convolutions of coil to separate the convolutions so that the projections of adjacent convolutions will be spaced from each other.

4. Means for forming a coil of metal and separating the convolutions of the coil, comprising a pair of cooperating rolls, projections on one roll and corresponding depressions in the other roll, means for passing a metal strip through said rolls so as to form projections upon the edge portions only thereof, a drum located beyond said rolls and having means for receiving the leading end oi! the metal strip, means for rotating the drum in one direction for.coiling the metal thereon to form a coil the convolutions of which have spaced projections therein, means for rotating the drum in the opposite direction and means comprising a concentric guard plate and a stop adjacent to the drum the outer end of the coil against movement and producing relative movement between adjacent convolutions of 'coil to separate the convolutions so that the projections of adjacent convolutions will be spaced from each other. i

5. Means for forming a coil of metal and separating the convolutions of the coil, comprising a pair of cooperating rolls, projections on one roll and corresponding depressions in the other roll, means forpassing a metal strip through said rolls so as to form projections in zig-zag arrangement thereon, a drum located beyond said rolls and having means for receiving the leading end of the metal strip, means for rotating the drum in one direction for coiling the metal thereon.to form a coil the convoluilons of which have spaced projections therein, means for rotating the drum in the opposite direction and means comprising a concentric guard plate and a stop adjacent to the drum for engaging and holding the outer end of the coil against movement and producing relative movement between adjacent convolutions of coil to separate the convolutions so that the projections of'adjacent convolutions will be spaced from each other.

' STONE NYBEIiG.

for engaging and holding

Images