US3083751A - Ring coiling and cut-off machine - Google Patents
Ring coiling and cut-off machine Download PDFInfo
- Publication number
- US3083751A US3083751A US745869A US74586958A US3083751A US 3083751 A US3083751 A US 3083751A US 745869 A US745869 A US 745869A US 74586958 A US74586958 A US 74586958A US 3083751 A US3083751 A US 3083751A
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- United States
- Prior art keywords
- stock
- die
- cut
- ring
- machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/30—Making other particular articles wheels or the like wheel rims
Definitions
- the present invention while generally indicated as relating to a ring coiling and cut-off machine, relates more especially to a machine and method for making drop-center wheel rims from preformed stock.
- the invention comprises the features hereinafter fully described and particularly pointed out in the claims, the following description and the annexed drawings setting forth in detail a certain illustrative embodiment of the invention, this bein indicative, however, of but one of the various ways in which the principle of the invention may be employed.
- FIG. 1 is a side elevation view showing a preferred setup for producing drop-center wheel rims from a coil of fiat strip stock, an uncoiler being shown at the right, a roll-forming machine being shown at the middle, and a ring ceiling and cut-otf machine being shown at the left;
- FIG. 2 is a top plan view of the ring coiling and cutoff machine herein and of the last roll stand from which the preformed stock is longitudinally pushed into the ring ceiling and cut-off machine;
- FIG. 3 is a side elevation view of the ring coiling and cut-off machine, the machine being shown in its normal operating position with the end of the preformed stock being bent to form a ring;
- FIG. 4 is a side elevation View similar to FIG. 3, except showing the machine in open position with the cut-off ring stripped from the curved dies;
- FIG. 5 is a cross-section view taken substantially along the line 55, FIG. 3;
- FIG. 6 is a cross-section view taken substantially along the line 6-6, FIG. 3;
- FIG. 7 is a fragmentary top plan view as viewed substantially along the line 77, FIG. 3;
- FIG. 8 is a crosssection view taken substantially along the line 3-8, FIG. 6.
- THE RIM-FORMING SETUP AS A WHOLE (FlGS. 1 and 2) Basically, the setup as shown in FIGS. 1 and 2 includes an uncoiler l on which a coil C of flat stri stock S is rotatably mounted.
- the flat strip stock S is unwound from the coil C and passes through a guide 2 and thence through a roll-forming mill 3 which may comprise a series of roll stands 4 each equipped with power-drive-n roll sets 5 to progressively transform the stock S from list form to final desired cross-section shape.
- the number of roll stands 4 required depends, of course, on the intricacy of the cross-section shape to which the stock S is to be rolled and in the case of stock to be used in making drop-center whee-l rims, as herein, it has been found that a line of about twelve roll stands 4 is adaquate to form (see FIG. 6) the longitudinally extending rib 6 which, in the finished wheel rim, constitutes the dropcenter well and to form the rim flanges 7 against which the tire beads are adapted to be seated. From the last roll stand 4 the formed stock S is pushed longitudinally into the ring coiling and cut-off machine 8.
- RING COILING AND CUT-OFF MACHINE (FIGS. 3 to 8) (a) The Base and Die Blocks The ring coiling and cut-01f machine 8 is built on an open front box-like base 9 including upstanding end Walls 10 and 11, an upstanding rear wall 12, and a top wall 14.
- the end wall 11 has welded thereto a bracket 15 to which a die holder 16 is pivotally mounted on pin 17.
- a die shoe r block 18 which is formed with an arcuate die face 19 which is of radial cross-section conforming with the crosssection of the preformed strip S.
- the die block 18 is the male die and fits in between the rim flanges 7 and in the well or tunnel 6 of the preformed stock S.
- FIG. 3 the die block 18 and its holder 16 are shown in operating position with one end of the arcuate die face 19 tangent to the longitudinal path of travel of the preformed stock S.
- the holder 16 is locked in this position by means of the toggle linkage 20 of which the top and bottom links are pivotally mounted respectively to the die holder 16 by the pin 21 and to a bracket 23 on the base 9 by the pin 24.
- the die holder -16 is swung down to the FIG. 4 open position as by means of the hydraulic cylinder 25 having its piston rod 26 linked to the knee joint 27 of the toggle linkage 20, the cylinder 25 being mounted on trunnions 28 on the end wall 10 of the base 9.
- the cylinder 25 When the cylinder 25 is extended, as shown in FIG.
- the toggle linkage 20 is in locked position thereby immovably securing the die holder 16 and the die block 18 in operating position.
- the toggle linkage 20 is collapsed to swing the die holder 16 and die block 18 in a counterclockwise direction about the pin 17 to the position shown in FIG. 4.
- the die block 18 Opposite the die block 18 is the female die block or shoe 30 which is formed with an arcuate die face 31 concentric With the arcuate die face 19 and arranged to embrace the rim flanges 7 and well 6 of the preformed stock S.
- the complementary opposed arcuate die faces 19 and 31 of the respective die blocks 18 and 30 define therebetween an arcuate die cavity which is open at both ends and which has a cross-section the same as the cross-section of the preformed stock S.
- the die faces 19 and 3-1 have a radius of curvature which is the same as the radius of curvature of the finished wheel rim which is to be formed by the machine.
- the preformed stock S as it emerges from the last roll stand 4 will-be pushed longitudinally into the inlet end of the arcuate die cavity defined between the concentric die faces 19 and 31 of the die blocks 18 and 30.
- the stock S As the stock S is pushed longitudinally through the die cavity it will be bent to a radius corresponding with the radius of the die faces 19 and 31 and the free end will travel in a circular loop that approaches the inlet end of the die cavity.
- the free end of the loop after it emerges from the die cavity is guided by the rollers 32, 33, and 34 of which the last-mentioned roller 34 constitutes a pusher roll as hereinafter explained.
- the Die Block Indexing Mechanism The die block 30 is keyed to the front end of shaft 35 that is rotatably supported in a boss 36 of rear wall 12 of the base 9 about the axis of the die faces 19 and 31 for indexing of the die block 30 to three positions, viz., the operating position shown in FIG. 3, the rim cut-off position shown in dot-dash lines in FIG. 3, and the rim unload position shown in FIG. 4.
- a rotary fluid motor 37 and an indexing mechanism 38 operatively associated with the rear end of the shaft 35.
- the shaft 35 and die block 30 are held in the FIG. 3 operating position, as by means of a plunger 39 which is releasably engaged in a notch 40 formed in a collar 41 keyed on the shaft 35 by the hydraulic cylinder 42.
- the cylinder 42 is actuated to retract the plunger 39 toward the left as viewed in FIG. 8 whereupon the shaft 35 and die block 30 may be rotated clockwise as viewed in FIG. 3 (counterclockwise as viewed in FIG.
- the die block 30 carries a cut-off blade 50 which cooperates with a movable cutoff blade 51 to shear the preformed stock S after the end portion thereof has been formed into a ring.
- the movable cut-off blade 51 is carries by a slide block 52 which is vertically slidable in a guideway 53 formed in the die holder '16 and has a cutting edge 54 which moves in a path normal to the point of tangency of the curved stock and the adjoining unbent stock.
- Movement of the block 52 and blade 51 vertically is effected as by means of the hydraulic cylinder 56 and toggle linkage 57, of which one link 58 is pivotally connected to the block 52 by means of the pin 59 and of which the other link 60 is pivotally connected on a bracket 61 of the base 9 by pin 62, the knee joint 63 being pivotally secured at the end of the piston rod 64 of said hydraulic cylinder 56.
- the cylinder 56 is pivotally mounted by pin 65 to a bracket 67 extending inwardly from the adjacent end wall 11.
- the turning or indexing of the die block 30 from operating position to ring cut-off position as aforesaid is done by the free end of the curved loop.
- a limit switch 70 which, in turn, as to be explained in detail, causes the plunger 39 to be retracted from the notch 40.
- the shaft 35 and die block 30 are thus freed for clockwise movement by the free end of the loop of stock as it moves in contact with the right-hand side face of the blade 50.
- the cylinder '44 has been actuated to tend to force the plunger 43 inwardly whereupon, as soon as the other notch 45 is aligned with the plunger 43, the shaft 35 and die block 30 Will be locked in the indexed cut-off position in which the right-hand side 68 of the blade 50 is in alignment with the left-hand side 54 of the movable blade 51.
- the roller 34 previously referred to is mounted on a carrier 73 equipped with guide bars 74 that are slidable in hushed eyes 75 on bracket 15, the carrier 73 being reciprocated between the FIG. 3 and FIG. 4 positions by cylinder 76.
- the roller 34 constitutes a guide roller along with rollers 32 and 33 and when the roller 34 is shifted to the FIG. 4 position it constitutes a pusher roll to laterally shift the cut-off ring clear of the free end of the straight preformed stock S and to strip the cut-01f ring from the die block 30.
- the limit switch 72 also controls actuation of cylinder 76.
- the carrier 73 actuates a limit switch 78 to extend the hydraulic cylinder 79 which has its piston rod 80 guided in a bracket 81 at the-top of the base '9 and linked to a horizontally slidable shaft 82-which carries a downwardly extending arm 83 provided with a bearing 8410 support the free end of the shaft 35 on which the die block 30 is mounted.
- the arm 83 has an ejector finger 85 which draws the wheel rim axially toward the open front of the machine base 9 for dropping clear of the die blocks '18 and 30.
- the cylinder 79 is actuated to bring the arm 83 back so that its bearing 84 supports the free end of the shaft 35 and so that the ejector finger-85 is to the rear of the next wheel rim to be formed; the pusher roll 34 is retracted to the FIG. 3 position; the shaft 35 and die block 30 are turned counterclockwise to the FIG. 3 position by rotary fluid motor 37; and the cylinder 25 is actuated to move the piston rod 26 toward the right to lock up the toggle linkage 20 thereby bringing the die holder !16 and die block 18 to operating position.
- the roll forming machine 3 may be actuated an instant before the shifting of die block 18 to push the free end of the preformed stock S into the die cavity entrance to form the next rim.
- the actuation of the switch 72 also causes the top die block 30 to rotate through the action of the rotary fluid motor 37 in a direction away from the forming mill 3, to the position shown in FIG. 4, and the cylinder 76 is actuated to cause the pusher roll 34 to shift the severed ring toward the left to thus strip it from the top die block 30.
- the cylinder 79 is actuated to move the ejector finger axially outward with respect to the die blocks 18 and 30 to allow the severed ring to drop clear of the machine ready for performance of the butt-weldingoperation to form a completed drop center wheel rim.
- the limit switches may have "multiple contacts to operate one or more of the valves at the same time or, if preferred, the limit switches may be arranged to energize relay coils to move contactors that open and close the circuits through the valve solenoids. Insofar as the time delay periods are concerned these may be in the form of dashpots in the switches or 7 separate timing devices connected either in the electrical circuit or in the hydraulic circuit.
- rings such as wheel rims
- rings may be rapidly and accurately formed without scrap loss, or without the spinning or press-forming operations heretofore performed in the manufacture of drop-center wheel rims, or without flattening operations as required when preformed stock is hclically coiled, or without requiring trimming or cropping of unbent ends as results from ordinary ring rolling operations wherein straight strip stock is passed between a series of staggered rollers.
- the present apparatus is simple in comparison wi h p e s a p nn n l n s n r quires less floor space with fewer operating personnel. Specifically, the number of personnel may be cut down to about one-third with the present method and apparatus to achieve a specified rate of production of wheel rims.
- the machine of claim 1 including means operative relatively to move said die blocks away from one an.- other to facilitate insertion of the leading end of the stock into said cavity and toward one another to define said cavity and to curve the leading end of the stock thus inserted into said one end of said cavity.
- one die block is mounted for movement radially away from the other die 1 991; to strip said one die block from the severed ring, wherein said other die block is mounted for rotation about the axis of said opposed arcuate die faces to a position such that its arcuate face is circumferentially ofifset with respect to the arcuate face of said one die block, and wherein means are provid d to laterally shift the severed ring to radially strip it from said other die block and to clear the freeend of the adipining stock,
- ejector means are effective to axially shift the severed ring from between said die blocks when in radially separated and circumferentially offset positions as aforesaid.
- the machine of claim 8 including a movable rim ejector effective to displace axially the freed rim from between said die blocks.
- toggle linkages are provided for achieving locking of said other block in fixed operating position with respect to said one die block and for achieving a great mechanical advantage in the stock cutting movement of said movable blade.
- toggle linkages are actuated by uid motors operatively connected to the knee joints of said toggle linkages.
- an uncoiler from which flat strip stock is unwound from a coil a forming mill including a series of roll stands through which the stock is passed longitudinally and progressively formed to a cross-section shape conforming generally with the radial cross-section of a drop-center wheel rim and the like; and a coiling and cut-off machine provided with an open ended arcuate die cavity that has a transverse cross-section generally the same as that of the stock as it emerges from the last roll stand, the formed stock being pushed by the forming mill into one end of said cavity to form a full circle rim and being cut-off at the point of tangency of the curved stock and the adjoining stock immediately in advance of said cavity; and means operative to interrupt the operation of said forming mill during the cut-off operation,
- ejector means are provided to axially displace the cut-otf rim and o ein t a op ra o f s i min m p io to br i o t e ppo d a e w rd ach ot e e y t e ead n nd of h for St k i P h d in between such faces and bent to curved form as said faces are moved toward each other.
- apparatus for forming rings from continuous lengths of elongated stock including means for advancing such stock longitudinally and a die disposed to receive such stock and form it in a circle as such stock is thus advanced; cut-oil means operative to cut oft" a ring thus formed from the leading end portion of such stock, said cut-01f means being located closely adjacent the entrance end of said die and severing such stock substantially normal thereto.
- the apparatus of claim 16 including ejection means operative to eject such severed ring from said die.
- said die comprises two cooperating opposed arcuate die members, means operative intermittently to move said die members relatively further apart, and ejection means thereupon operative to eject such severed ring laterally from between said die members.
- said die comprises two cooperating opposed arcuate die members, means operative intermittently to move said die members relatively further apart, means operative to shift such severed ring in the direction of travel of the uncircularized stock, and ejection means thereupon operative to eject such severed ring laterally from between said die members.
- said die comprises two cooperating opposed arcuate die members, means operative intermittently to move said die members relatively further apart, and said cut-off means comprises one blade mounted on one of said die members and a second blade mounted for reciprocation relative thereto.
- said die comprises two cooperating opposed arcuate die members, means operative intermittently to move said die members relatively further apart, said stock advancing means being operative to advance the leading end of the cut off uncircularized stock a short distance between said die members prior to return of said die members into stock circularizing relationship, and means operative thus to return said die members to such relationship to press the leading end portion of the stock to curved form.
- apparatus for forming rings from continuous lengths of elongated stock including means for advancing such stock longitudinally and a die disposed to receive such stock and form it in a circle as thus advanced; cut-01f means operative to cut oil a ring thus formed from the leading end portion of such stock, said cut-off means being located at the entrance end of said die, said die comprising two cooperating opposed arcuate die members, means operative intermittently to move said die members relatively apart and ejection means thereupon operative to eject such severed ring laterally from between said die members.
- the apparatus of claim 22 including means operative to shift such severed ring in the direction of travel of the uncircularized stock.
- cut-off means comprises one blade mounted on one said die member and a second blade mounted for reciprocation relative thereto in a plane passing through the center of such coiled stock.
- apparatus for forming rings from continuous lengths of elongated stock including means for advancing such stock longitudinally; a die comprising two cooperating opposed arcuate die members disposed to receive such stock and form it in a circle as such stock is thus advanced, cut-ofi means operative to sever a ring thus formed from the leading end portion of such stock, and means operative to move said die members apart axially to clear such ring from said die members, and means axially to eject such ring.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US745869A US3083751A (en) | 1958-07-01 | 1958-07-01 | Ring coiling and cut-off machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US745869A US3083751A (en) | 1958-07-01 | 1958-07-01 | Ring coiling and cut-off machine |
Publications (1)
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US3083751A true US3083751A (en) | 1963-04-02 |
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US745869A Expired - Lifetime US3083751A (en) | 1958-07-01 | 1958-07-01 | Ring coiling and cut-off machine |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3662940A (en) * | 1969-05-13 | 1972-05-16 | Grotnes Machine Works Inc | Method and apparatus for forming cylinders from strip material |
FR2332079A1 (en) * | 1975-11-21 | 1977-06-17 | Holland Mechanics Bv | PROCESS FOR FORMING CIRCULAR ELEMENTS, ESPECIALLY RIMS, FROM A STRAIGHT PROFILED METAL TAPE, AND APPARATUS FOR ITS IMPLEMENTATION |
US20100011829A1 (en) * | 2006-08-23 | 2010-01-21 | Metform International Ltd. | Roll-forming machine for forming smooth curves in profiled panel sections and method of forming curved panels |
US20120193971A1 (en) * | 2011-02-01 | 2012-08-02 | Shimano Inc. | Bicycle rim and method of manufacture thereof |
Citations (13)
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US682070A (en) * | 1901-04-16 | 1901-09-03 | Hubert Chauncey Hart | Machine for making washers. |
US778472A (en) * | 1903-04-15 | 1904-12-27 | Bliss E W Co | Ring-making machine. |
US1437628A (en) * | 1921-09-09 | 1922-12-05 | Ezra H Wulff | Method of making tire rims |
US1698083A (en) * | 1929-01-08 | booth | ||
US1719250A (en) * | 1926-01-25 | 1929-07-02 | Elgin Butter Tub Company | Machine for making metal hoops |
US1762556A (en) * | 1927-06-01 | 1930-06-10 | Lewis C Marshall | Process and apparatus for making piston rings |
US1835589A (en) * | 1929-04-09 | 1931-12-08 | Owen Automatic Spring Machiner | Means for forming coil springs |
US2214025A (en) * | 1939-03-04 | 1940-09-10 | Western Electric Co | Wire forming apparatus |
US2353925A (en) * | 1942-05-18 | 1944-07-18 | Bohn Aluminium & Brass Corp | Apparatus for forming arcuate bearings |
US2393804A (en) * | 1944-06-09 | 1946-01-29 | Aircraft Screw Prod Co | Wire coiling machine |
GB637809A (en) * | 1947-04-23 | 1950-05-24 | Glacier Co Ltd | Improvements in the manufacture of part-cylindrical objects from sheet or strip material |
US2675849A (en) * | 1949-08-26 | 1954-04-20 | Budd Co | Machine for coiling wheel rim stock or the like |
US2698642A (en) * | 1952-09-23 | 1955-01-04 | Malina Frank | Metal strip bending machine |
-
1958
- 1958-07-01 US US745869A patent/US3083751A/en not_active Expired - Lifetime
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1698083A (en) * | 1929-01-08 | booth | ||
US682070A (en) * | 1901-04-16 | 1901-09-03 | Hubert Chauncey Hart | Machine for making washers. |
US778472A (en) * | 1903-04-15 | 1904-12-27 | Bliss E W Co | Ring-making machine. |
US1437628A (en) * | 1921-09-09 | 1922-12-05 | Ezra H Wulff | Method of making tire rims |
US1719250A (en) * | 1926-01-25 | 1929-07-02 | Elgin Butter Tub Company | Machine for making metal hoops |
US1762556A (en) * | 1927-06-01 | 1930-06-10 | Lewis C Marshall | Process and apparatus for making piston rings |
US1835589A (en) * | 1929-04-09 | 1931-12-08 | Owen Automatic Spring Machiner | Means for forming coil springs |
US2214025A (en) * | 1939-03-04 | 1940-09-10 | Western Electric Co | Wire forming apparatus |
US2353925A (en) * | 1942-05-18 | 1944-07-18 | Bohn Aluminium & Brass Corp | Apparatus for forming arcuate bearings |
US2393804A (en) * | 1944-06-09 | 1946-01-29 | Aircraft Screw Prod Co | Wire coiling machine |
GB637809A (en) * | 1947-04-23 | 1950-05-24 | Glacier Co Ltd | Improvements in the manufacture of part-cylindrical objects from sheet or strip material |
US2675849A (en) * | 1949-08-26 | 1954-04-20 | Budd Co | Machine for coiling wheel rim stock or the like |
US2698642A (en) * | 1952-09-23 | 1955-01-04 | Malina Frank | Metal strip bending machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3662940A (en) * | 1969-05-13 | 1972-05-16 | Grotnes Machine Works Inc | Method and apparatus for forming cylinders from strip material |
FR2332079A1 (en) * | 1975-11-21 | 1977-06-17 | Holland Mechanics Bv | PROCESS FOR FORMING CIRCULAR ELEMENTS, ESPECIALLY RIMS, FROM A STRAIGHT PROFILED METAL TAPE, AND APPARATUS FOR ITS IMPLEMENTATION |
US20100011829A1 (en) * | 2006-08-23 | 2010-01-21 | Metform International Ltd. | Roll-forming machine for forming smooth curves in profiled panel sections and method of forming curved panels |
US20120193971A1 (en) * | 2011-02-01 | 2012-08-02 | Shimano Inc. | Bicycle rim and method of manufacture thereof |
US8756814B2 (en) * | 2011-02-01 | 2014-06-24 | Shimano Inc. | Method of manufacturing a bicycle rim |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTERCOLE BOLLING CORPORATION, 5500 WALWORTH AVE., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:YODER COMPANY THE;REEL/FRAME:003953/0461 Effective date: 19811029 Owner name: INTERCOLE BOLLING CORPORATION, A CORP. OF OH, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YODER COMPANY THE;REEL/FRAME:003953/0461 Effective date: 19811029 |
|
AS | Assignment |
Owner name: MANUFACTURERS HANOVER TRUST COMPANY Free format text: SECURITY INTEREST;ASSIGNOR:INTERCOLE BOLLING CORPORATION;REEL/FRAME:004406/0261 Effective date: 19850416 Owner name: INTERCOLE ACQUISITION CORPORATION Free format text: SECURITY INTEREST;ASSIGNOR:INTERCOLE BOLLING CORPORATION;REEL/FRAME:004406/0261 Effective date: 19850416 |