US20080196472A1 - Apparatus and method for forming inside surface of tube stock - Google Patents
Apparatus and method for forming inside surface of tube stock Download PDFInfo
- Publication number
- US20080196472A1 US20080196472A1 US11/511,871 US51187106A US2008196472A1 US 20080196472 A1 US20080196472 A1 US 20080196472A1 US 51187106 A US51187106 A US 51187106A US 2008196472 A1 US2008196472 A1 US 2008196472A1
- Authority
- US
- United States
- Prior art keywords
- tube
- arbor
- shaped
- forming
- rolls
- Prior art date
- 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.)
- Abandoned
Links
Images
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
- B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
-
- 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
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/06—Corrugating tubes transversely, e.g. helically annularly
-
- 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
- B21D53/16—Making other particular articles rings, e.g. barrel hoops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
- B21H1/12—Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/64—Special methods of manufacture
Definitions
- This invention relates generally to metal forming and more particularly to preparing tubing for manufacture of outer races for tapered roller bearings.
- outer bearing races for tapered roller bearings.
- they involve using a seamless tube made of steel and cross-cutting it into rings followed by machining the rings to form a smooth cylindrical outside diameter (O.D.) and a conical I.D.
- One of the known ways to cut the tube into rings is to use a gang saw as disclosed in U.S. Pat. No. 5,293,794 issued to Mosey et al. on Mar. 15, 1994. That saw provides an advantage over prior saws in that the amount of tube material lost due to the kurf of sawblades with prior equipment was reduced, so that more rings can be produced from a length of tubing. There remains an interest in optimizing the production of useful parts from a length of tubing.
- Another feature is roll forming of the shape.
- Another feature of the present invention is forming the interior surface of the tube into a shape similar to the desired shape for the bearing cup I.D.
- Another feature of the present invention is roll forming of the shape.
- FIG. 1 is a cross-sectional view showing the one embodiment of the invention.
- FIG. 2 is a schematic showing the orientation of the tool of the two rolls.
- a pair of rolls 11 and 12 in a tube rolling mill are shown having received a pierced seamless tube shell 13 between them.
- An arbor 14 is provided inside the tube.
- the rolls themselves are conical from their ends toward a circular crown area such as 16 , and are skewed as show at 11 A in FIG. 2 for the roll 11 and 12 A for roll 12 . Therefore, as the leading end of tube 13 along with the leading of arbor 14 are introduced simultaneously in the direction of arrow between the rotating rolls, they will advance the tube in the direction of arrow of 17 .
- the shaped arbor 14 is introduced into the trailing end of a pierced seamless tube shell heated to 2,250 degrees Fahrenheit.
- the arbor length will be the length of the tube plus approximately 20% projecting out the tail end of the tube because, as the tube is processed through the rolls, it will become elongated.
- the shell In an elongating mill or like mill and setting the roll gap smaller than the shell outside diameter (O.D.), the shell is forced down onto the shaped arbor.
- the arbor is circular about a longitudinal axis 18 which is also the axis of the tube 13 .
- the shell will go into the rolls round and be squeezed oval as the rolls rotate it and move it against the arbor at the gap, rotating the arbor along with the tubing.
- the tubing exits the roll gap, it expands radially to its original O.D. or slightly less. This results in an air gap 19 created between the outer surface of the arbor and the inner surface of the shell as the shell exits the rolls.
- the arbor can be removed by simply pulling it out of the tube.
- the completed tube can then be cross-cut at 21 , 22 and 23 , for example, to make two O-rings having conical inside faces which can then be lightly machined and ground or otherwise treated for finishing into a bearing cup.
- the arbor is shaped for a succession of generally conical faces in alternate directions of taper relative to the axis 18 to provide a series of alternating conical inside faces of the tube shell which can then be converted readily to bearing cup rings.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
A method for forming a smooth cylindrical inside wall of a tube is described. The tube is heated and a shaped arbor is inserted into the tube. The tube is forced against the arbor to shape the interior of the tube in general conformity to the arbor and the arbor is removed. The tube may be cut into several sections shaped to be useful as tapered roller bearing cups.
Description
- This application claims the benefit of U.S. Provisional Application Ser. No. 60/715,340 filed Sep. 8, 2005.
- This invention relates generally to metal forming and more particularly to preparing tubing for manufacture of outer races for tapered roller bearings.
- Various ways are known to make outer bearing races (usually referred to as “cups”) for tapered roller bearings. Typically they involve using a seamless tube made of steel and cross-cutting it into rings followed by machining the rings to form a smooth cylindrical outside diameter (O.D.) and a conical I.D. One of the known ways to cut the tube into rings is to use a gang saw as disclosed in U.S. Pat. No. 5,293,794 issued to Mosey et al. on Mar. 15, 1994. That saw provides an advantage over prior saws in that the amount of tube material lost due to the kurf of sawblades with prior equipment was reduced, so that more rings can be produced from a length of tubing. There remains an interest in optimizing the production of useful parts from a length of tubing.
- According to one feature of my invention, instead of a smooth cylindrical inside wall of the tube, it is treated to reduce the amount of material removal which would otherwise occur in the machining of the bearing cups produced from the tube. Another feature is forming the interior surface of the tube into a shape similar to the desired shape for the bearing cup I.D.
- Another feature is roll forming of the shape.
- In one embodiment of the present invention, instead of a smooth cylindrical inside wall of the tube, it is treated to reduce the amount of material removal which would otherwise occur in the machining of the bearing cups produced from the tube.
- Another feature of the present invention is forming the interior surface of the tube into a shape similar to the desired shape for the bearing cup I.D.
- Another feature of the present invention is roll forming of the shape.
-
FIG. 1 is a cross-sectional view showing the one embodiment of the invention. -
FIG. 2 is a schematic showing the orientation of the tool of the two rolls. - For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings, and specific language will be used to describe that embodiment. It will nevertheless be understood that no limitation of the scope of the invention is intended. Alterations and modifications in the illustrated device, and further applications of the principles of the invention as illustrated therein, as would normally occur to one skilled in the art to which the invention relates are contemplated, are desired to be protected. In particular, although the invention is discussed in terms of a blood glucose meter, it is contemplated that the invention can be used with devices for measuring other analytes and other sample types. Such alternative embodiments require certain adaptations to the embodiments discussed herein that would be obvious to those skilled in the art.
- Referring now to the attached drawing, a pair of
rolls 11 and 12 in a tube rolling mill are shown having received a pierced seamless tube shell 13 between them. Anarbor 14 is provided inside the tube. The rolls themselves are conical from their ends toward a circular crown area such as 16, and are skewed as show at 11A inFIG. 2 for the roll 11 and 12A forroll 12. Therefore, as the leading end of tube 13 along with the leading ofarbor 14 are introduced simultaneously in the direction of arrow between the rotating rolls, they will advance the tube in the direction of arrow of 17. - Briefly stated, the
shaped arbor 14 is introduced into the trailing end of a pierced seamless tube shell heated to 2,250 degrees Fahrenheit. The arbor length will be the length of the tube plus approximately 20% projecting out the tail end of the tube because, as the tube is processed through the rolls, it will become elongated. In an elongating mill or like mill and setting the roll gap smaller than the shell outside diameter (O.D.), the shell is forced down onto the shaped arbor. The arbor is circular about alongitudinal axis 18 which is also the axis of the tube 13. As the rolls turn and being skewed as they are, advance the tube shell, the shell will go into the rolls round and be squeezed oval as the rolls rotate it and move it against the arbor at the gap, rotating the arbor along with the tubing. As the tubing exits the roll gap, it expands radially to its original O.D. or slightly less. This results in anair gap 19 created between the outer surface of the arbor and the inner surface of the shell as the shell exits the rolls. After the entire tube has passed through the rolls, the arbor can be removed by simply pulling it out of the tube. - The completed tube can then be cross-cut at 21, 22 and 23, for example, to make two O-rings having conical inside faces which can then be lightly machined and ground or otherwise treated for finishing into a bearing cup. Thus it is seen that the arbor is shaped for a succession of generally conical faces in alternate directions of taper relative to the
axis 18 to provide a series of alternating conical inside faces of the tube shell which can then be converted readily to bearing cup rings. - U.S. Pat. No. 5,406,820 issued to me on Apr. 18, 1995 discloses an organization of gripping rolls and material feed into such rolls. Other arrangements may also be used.
- While the invention has been illustrated and described in detail in the drawings and foregoing description, the description is to be considered as illustrative and not restrictive in character. Only the preferred embodiment, and certain other embodiments deemed helpful in further explaining how to make or use the preferred embodiment, have been shown. All changes and modifications that come within the spirit of the invention are desired to be protected.
Claims (2)
1. A method of forming a smooth cylindrical inside wall of a tube useful for preparing tapered roller bearing cups, comprising:
providing a tube heated to an elevated temperature sufficient to allow forming of the tube by pressing against a shaped arbor;
inserting a shaped arbor into the tube;
forcing the tube against the arbor to shape the interior of the tube in general conformity with the shaped arbor; and
removing the shaped arbor from the tube.
2. The method of claim 1 and which further comprises cutting the tube into several sections shaped to be useful as tapered roller bearing cups.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/511,871 US20080196472A1 (en) | 2005-09-08 | 2006-08-29 | Apparatus and method for forming inside surface of tube stock |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US71534005P | 2005-09-08 | 2005-09-08 | |
US11/511,871 US20080196472A1 (en) | 2005-09-08 | 2006-08-29 | Apparatus and method for forming inside surface of tube stock |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080196472A1 true US20080196472A1 (en) | 2008-08-21 |
Family
ID=39705508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/511,871 Abandoned US20080196472A1 (en) | 2005-09-08 | 2006-08-29 | Apparatus and method for forming inside surface of tube stock |
Country Status (1)
Country | Link |
---|---|
US (1) | US20080196472A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5293794A (en) * | 1993-03-01 | 1994-03-15 | Mosey George N | Turning and boring machine for rings |
US5406820A (en) * | 1992-03-23 | 1995-04-18 | Mosey; George N. | Piercing mill for seamless tube manufacture |
-
2006
- 2006-08-29 US US11/511,871 patent/US20080196472A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5406820A (en) * | 1992-03-23 | 1995-04-18 | Mosey; George N. | Piercing mill for seamless tube manufacture |
US5293794A (en) * | 1993-03-01 | 1994-03-15 | Mosey George N | Turning and boring machine for rings |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MOSEY MANUFACTURING CO., INC., INDIANA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOSEY, GEORGE N.;REEL/FRAME:018395/0279 Effective date: 20061012 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |