US2233547A - Strip coiling machine - Google Patents

Description

March 4, 1941.

R. J. MILLER. ETAL STRIP COILING MACHINE Filed June 13, 1939 3 Sheets-Sheet 1 gwwmws RALPH :r. MILLER RUSSELL T. TODD March 4, 1941. R. J. MILLER ETAL STRIP COILING MACHINE 5 Sheets-Sheet 2 Filed June l5,v 1939 grave/whom RALPH I MILLER RUSSELL T. TODD March 4, 1941. R. J. MILLER ETAL STRIP COILING MACHINE Filed June 13, 1939 3' Sheets-Sheet 3 JrvuQ/IVbOf/S RALPH J. MILLER RUSSELL T. TODD Gum/nan able Patented Mar. 4, 1941 UNITED s'rA'rss PATENT orrici-z Ohio, assignors Youngstown,

to McKay Machine Company, Ohio, a corporation of Ohio Application June 13, 1939, Serial No. 278,856

Claims- .speed of operation is desired and the coiling machine at'the end of the assembly must therefore 5 be capable of coiling the strip stock rapidly.

' Heretofore, inmachines'for the purpose stated,

considerable difflculty has been encountered in satisfactorily guiding the rapidly-moving stock as it assumes the coil form. To provide a satis- 29 factory coll which may be expeditiously handled by machines in subsequent processes, the side edges of the strip constituting the coil must be reasonably aligned and this requires considerable 28 pressure on one or the other of the side edges of the strip depending on the direction of movement taken by the particular strip increment. The arrangements heretofore used to. guide the side edges of the strip into proper alignment caused considerable damage to the side edges by so tearing and bending and the guide surfaces themselves, being subjected to excessive wear by action or the strip, required frequent replacement. Therefore, the primary object of the invention as is the provision of metal strip guiding means for use in conjunction will enable an accurate edges of the strip of the coil to be maintained without injury to the side edge of the strip, and without excessive wear of the guiding surfaces employed.

Another object of the invention is the provision of an arrangement for the purposes stated which iseconomical to construct, rugged and dependin service, and which does not require any substantial changes in thedesign of acceptable machines well suited for the purpose of coiling strip.

A further so a strip guiding device These and the invention will become apparent from a consideration of the following. detailed specification and'the accompanying -win s wherein there is u specifically disclosed a preferred embodiment of alignment of the side object of the invention is to provide improved. design.

with a strip coiler which other objects "and advantages of the invention as applied to a strip coiling machine of the pyramid bender type.

In the drawings: Figure 1 is a plan view of a strip coiling machine embodying the principles and teachings of the invention; Figure 2 is a cross-sectional view'of the machine of Figure 1, the section being taken alongthe line 2-2 of Figure l;

Figure 3 is a fragmentary sectional view taken along the line 3-: of e 1; and Figure 4 is a plan view. partly in section, on a. portion of the machine of Figure 1. Y The machine illustrating the invention consists essentially of a. trio of bending rolls it, a pair of coil supporting cradle rolls It, and a siidins v assembly including a pair of rot side guidw i2 and an abutment it which engages the coil to eject the same upon completion of thecoiling operation. A pair of pinch rolls it are provided to engage and feed the strip through the bending I rolls and the lower roll of .this pair, together with the two lower bending rolls, are journaled in suitable vertically movable chocks i5 and G6, respectively, for the purpose of varying the pressure exerted by the pinch rolls M and the radius of bending by the bending rolls iii. Cradle rolls I I, upper pinch and bending rolls and the checks mentioned are suitably supported in the parallel housings it which in turn are secured to and supported by a base assembly it. The rolls thus provided are driven by a suitable motor 20, also mounted on the base It, through suitable gearing (not shown) housed within gear case 2!. Flexible couplings 22 connect the gear. drive with the various rolls mentioned, thereby nabling the lower of the pinch rolls and the two lower bend-- ing rolls to be'adjusted vertically at will.

Chocks it are vertically guided in the housings l8 and are supported by screws 24 which extend downwardly into bores provided in the housings. Worm wheels'23 internally threaded to receive screws 24 and driven by worms 25 are rovided to raise and lower chocks 18. The worms 25 are carried on a shaft 26 which is driven by 45 hand wheel 2'! through chain 28. A similar arrangement including a shaft 29 is provided to.

raise and lower chock l5. Slidably mounted on the housings llin suitable guides (not shown) is the transverse member 30 having an arcuately shaped abutment i3 and a transversely extending barll provided with laterally extending flanges 32 for a purpose to be later descrl Member 30 is moved longitudinally. along the ousings It by cylinder supported by a strut 36 spanning the upper ends of extensions 38 of the housings I8. Guide pins 40 are secured tomember 30 and pass through bushed apertures and strut 36 to aid in guiding member 30 along the path of travel. A pair of closed guide carriers 4| are slidably mounted on the bar 3| and extend out over the rolls mentioned and rotatably support adjacent their free ends the rotary guides I2. As shown in Figures 2' and 3, members 4| are provided with recesses 42 into which the flanges 32 of the bar 3| are received to provide means to guide and maintain the alignment of guide carriers '4l'. The latter are adapted ,to be moved along the bar 3| by the screws 44 which are journaled attheir inner ends in the bearing block 45 supported on bar 3| and at their outerends in the reduction gear .casings 46. Screws 44 are rotated by the motors 41 through suitable reduction gearing housed within the casings 46' and since screw threaded connections are provided between screws 40 and carriers 4| rotation of the screws resultsdn sliding movement of the carriers toward or away from each other to accommodate strips and coils of different widths.

. coiling machine.

Referring now to Figure 4, the improved strip uiding means of the invention consists of a pair ofdisk-like rotary guide members l2 each having a conically shaped outer surface 50. Each of the guides I2 is carried by a spindle 52 which is journaled in antifriction bearings 53.

carried by the housing 54 suitably secured to carrier 4|. The axes of the spindles 52 and consequently the axes of rotation of the rotary guides carried thereby are angularly disposed in relation to the parallel axes of the rolls and a line connecting the high center points of the surfaces to provide, in effect, movable guiding incremental surfaces which move toward each other as they approach a horizontal plane extending to one side of the line connecting the two center high points of the conical surfaces 50. Theoretically, therefore, a coil or other ob- -ject having plane parallel side surfaces positioned between the, surfaces 50 and contacting the latter surfaces will contact such surfaces only along two spaced parallel. lines which are indicated on Figure 4 by the latter P. This arrangement is. accomplished by rotating the axis of rotation of the rotary members l2 about verticallines-and through the angles indicated at Q. In the figure the line C- C' connects the center high points of the surfaces 50 and is parallel with the axes-of the various rolls of the Line D-D' represents the axis of rotation of one, of the rotary'guides.

In operation, strip material is fed into the machine through the pinch rolls l4 and by means of suitableguides 55 is guided through the bendrolls III. A small idling roll 55 in contact with one of-the cradle rolls H is provided to guide the bent material away from such cradle roll in the manner shown. The material moves upwardly and backwardly and. as its leading end approaches the theoretical plane bounded by the lines CC. andP it will engage the surfaces 50 if it has not already done so causing such surfaces to freely revolve about with the side edges of the --material. Due to the converging action of the surfaces '50 the side edges of th material will be progressively slowly brought into proper alignment reaching its final stage when the lines P Rare reached. Because of the progressive nature of the aligning process an to move said member.

the bent stock from engaging adjacent roll II V which by reason of the fact that it rotates in a clockwise direction, as viewed in Figure 2, would present a surface moving in the opposite direction to that of the stock thereby resulting in excessive wear and damage to the surface of the stock. As the coil is formed between the'guides l2 it rests on the cradle rolls II and the center supporting plate 58 and upon completion of the coiling operation of the particular length of strip, cylinder '35 is actuated thereby sliding abutment l3 along housings l8 and moving the formed sofl to the end of the housing where it will fall from between the guides I2.

The above specifically. described embodiment of the invention should be considered as illustrative only as obviously many changes may be made therein without departing from the spirit or scope of the invention.

What we claim is:

1. In a machine for coiling metal strip, the combination of a base, a pair of spaced housings mounted on said base, strip bending rolls spanning and journaled in said housings, a pair of spaced parallel cradle rolls positioned above said bending rolls and spanning and journaled in said housings, a frame member spanning said housings and adapted to move longitudinally therealong and normal to the axes of rotation of said rolls, a pair of spaced supports adjustably carried by said member in preselected spaced relation, a guide comprising a disk having a conically-shaped inner surface freely rotatably carried-by the inner side of each of said supports, the relation of the parts being such that when said member is in its normal retracted position a line connecting the center high points of said surfaces will be parallel with, substantially midway of and above the axes of said cradle rolls, the axes of rotation of said guides being angularly related to said line, means to rotate said .rolls, and means 2.. In a machine for coiling metal strip, the combination of a base, strip bending rolls rotatably supported on said base, a pair of spaced parallel cradle rolls positioned above said bending rolls, strip guiding means carried by said base compris- .a pair of opposed freely rotatable disks each having a conically-shaped inner surface, said disks being so mounted that during the normal coiling operation of the machine, a line connecting the center high points of said surfaces will be parallel with, substantially midway of, and above the axes of said cradle rolls, the axes of rotation of said,

disks being angularly related to said line,- and means ,to rotate said rolls.

. 3. In a machine. for coiling metal strip, the

combination of a base, continuous strip bending means supported on said base,-=a pairof spaced 1 parallel cradle rolls for the rotatable'support of the coil being formed supported on said base, a

pair of spaced guiding disks rotatably supp rted for free rotation-above said, cradle rolls, said disks having conically-shaped opposing surfaces and combination of a base, continuous strip bending means supported on said base, a pair of spaced parallel cradle rolls for the rotatable support of necting the center high points of said surfaces will the coil being formed supported on said base, a pair of spaced guiding disks supported for free rotation above said cradle rolls, said disks having sonically-shaped opposing surfaces and being so mounted that a line connecting the center high points of said surfaces will normally be substantiallyparallelwith, midway of, and above the axes of rotationof said cradle rolls, the axes of rotation of said disks being angularly related to said line whereby a plane including said line will intersect said surfaces along two spaced and substantially parallel-lines. n

5. In a machine for coiling metal strip, the combination of a base, continuous strip bending means supported on said base, means on said base to rotatably support the coil being formed, and means to engage and guide the side edges of the strip as it mova into the coil comprising a rotatable disk. positioned on either side oi. said coil supporting means, each of said disks being mounted for tree rotation having 'a conicallyshaped inner surface, saiddisks being mounted in such manner that a plane including a line conintersect said surfaces along two spaced substantlally parallel lines. 6. A guiding assembly for a metal strip coiling lflmachinea'pair oi spaceddiskseach having aconically-shapeddnner surface, said pleted coil from its support.

disks being mounted for free rotation in such manner that a plane including the line connecting the center high points of said surfaces will intersect'said surfaces along two spaced substantially parallel lines. v

'7. Apparatus according to claim 6 further including means to move said disks along said first mentioned line. a

i 8. Apparatus according to claim 6 further including a support below the space between said disks for the coil being formed, and meansto move said disks in a horizontal direction relative to said support.

9. Apparatus according to claim 6 further including a support below the space between said disks for thecoil being formed, means to move said disks individually along said last mentioned line,

and means to move said disks together in a horizontal direction relative to said support.- a

10. In a machine for coiling metal strip, the combination of abase, means supported on said base to impart a continuous bend to strip continuously fed into said machine, means to support the coils formed by the bending means, a movable frame member having a coil engaging abutment and a pair of spaced supporting elements mounted on said base, a freely rotatable guide carried by each of said supporting elements, said guides being positioned on either side of said coil support and being provided with conically shaped inner faces, the axis of rotation of said guides being angularly arranged whereby a plane including a line interconnecting the high points of the inner surfaces of said guides will intersect said inner surfaces along spaced parallel lines, means to move said guides toward and away from each other, and means to move said member in a direction normal to said line to move the com- RALPH J. MILLER. acsssu. r. Tom).

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