US3253444A - Method and apparatus for straightening tubular members - Google Patents

Method and apparatus for straightening tubular members Download PDF

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US3253444A
US3253444A US294279A US29427963A US3253444A US 3253444 A US3253444 A US 3253444A US 294279 A US294279 A US 294279A US 29427963 A US29427963 A US 29427963A US 3253444 A US3253444 A US 3253444A
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driveshaft
tubular member
rollers
axis
rotation
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US294279A
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Richard F Dolan
Frederick B Hill
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Motors Liquidation Co
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Motors Liquidation Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/30—Finishing tubes, e.g. sizing, burnishing
    • 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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/04—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes skew to the path of the work

Definitions

  • Such shafts are formed from standard tube stock which must be straightened before it can be used.
  • contoured rollers traversing the tubular stock to straighten the tube relative to its longitudinal axis.
  • the rolls are generally power driven to drive the tube past the rollers and the process requires bending and reverse bending of the tube about its axis with rotation of the tube as the bending occurs.
  • the commonly employed method is slow and requires skilled and experienced operators to properly straighten the tube.
  • a large mechanical or hydraulic ram is required to [bend the tube and it is necessary to continue the process intermittently, measuring the eccentricity and concentricity following each ibending operation. With devices of this nature it is not possible to straighten the end sections of the tube, portions which may be particularly important in vehicle propeller shafts to prevent a disproportionate section of unbalance.
  • the method and device in which this invention is embodied comprises, generally, a machine for rotating the tubular member on its longitudinal axis and a plurality of rollers. disposed circumferentially about the tube and equidistant from the tube axis.
  • the rolls are generally H-shaped in longitudinal cross-section to provide two point contact with the tubular member. As the rolls traverse the length of the tube they locally deform the surface of the tube beyond its elastic limit and move the surface into the proper relationship with the centerline of the propeller shaft. The surf-ace material is actually displaced to establish a centerline coincident with the axis of rotation of the tubular member.
  • FIGURE 1 is a perspectiveview of a machine capable of performing the method and showing the relative position of the various parts of the apparatus;
  • FIGURE 2 is a cross-sectional view of a portion of the apparatus illustrated in FIGURE 1, taken substantially along the line 22 of FIGURE 1, and looking in the direction of the arrows to show the tubular member and the disposition of the rollers thereabout;
  • FIGURE 3 is a plan view of that portion of the apparatus shown in FIGURE 2, taken substantially along the line 3-3 of FIGURE 2, and looking in the direction of the arrows;
  • FIGURE 4 is a perspective view of a portion of a vehicle propeller shaft which has been straightened by the apparatus of FIGURES 1-3.
  • FIGURE 1 best illustrates a typical machine and apparatus for accomplishing the method.
  • a machine frame illustrated generally by the numeral 10, carries a suitable electric motor or other rotating device within the cabinet 12.
  • the motor turns a typical chuck or the like 14 and may be controlled by a suitable control panel 16.
  • tailstock assembly illustrated generally by the numeral 18; and connecting the engine cabinet and tailstock assembly are a plurality of machine rails 20.
  • a tubular member Disposed between the chuck 14 and the tailstock assembly 18 is a tubular member, illustrated generally by the numeral 22, which, in the drawing for illustrative purposes, is shown to be a vehicle propeller shaft having universal joint halves 6, 8 secured to the respective ends thereof.
  • a vehicle propeller shaft having universal joint halves 6, 8 secured to the respective ends thereof.
  • One of the universal joint halves 6 on the one end of the shaft is mounted in chuck 14 and the other universal joint half 8 at the opposite end is received and rotatable in the tailstock assembly 18.
  • Suitable adjustment means 24 for the tailstock 18 may be provided.
  • a carriage assembly illustrated generally by the numeral 26, is mounted on rails 20 and contains the roller mounting cage 28. As will become hereinafter more apparent, carriage 26 traverses along the rails 20 by the action of the rollers on the tubular member so that the carriage 26 need not be operated under power.
  • the roller supporting cage 28 may be formed in any suitable manner and is shown for illustration purposes in FIGURES 2 and 3 to comprise side members 30 and 32. Disposed between the' side members are plates 34 to which are adjustably secured the roller assemblies, illustrated generallyby the numeral 36. An open area in the side members 30 and 32, as shown in FIGURE 2 at the upper left portion, is provided so that the tubular member may be inserted therein.
  • Roller assemblies 36 are shown to include a mounting plate 38, side plates 40 and rollers 42 which are rotatably secured in the side plates by pivot pins 44. It is important that the roller assemblies 36 be adjustable toward andaway from the tubular member 22 for purposes that will become hereinafter more apparent.
  • This device includes a pair of dowel pins or locating pins 46 which are secured in the mounting plate 38 and received in suitable apertures in the cage cross member 34.
  • a threaded bolt 48 and locking nut 50 are received on the cross members 34, the bolt 48 extending through the cross member 34 to engage the mounting plate 38. Rotation of the bolt 48 will obviously cause radial movement of the roller assembly 36 with respect to the'axis tubular member 22.
  • the rollers 42 are of generally H shape in their longitudinal cross-section, that is, the center portion 52 of the roller 42 is cylindrical, terminating in enlarged ends 54 which bear against the tubular member 22.
  • the longitudinal axis 56 of each roll is angularly disposed or skewed with respect to the longitudinal axis 58 .of the tubular member 22.
  • the amount of skew or angular displacement may be of any value but it has been determined that an angle of approximately 5 is most ellicient.
  • the four roller assemblies 42 are equally spaced about the circumference of the tubular member 22 and the axis of each roller 42 is equidistant from the tube centerline 58.
  • the universal joint halves 6, 8 of the tubular member or driveshaft 22 are secured in the machine by means of the chuck 14 and the tailstock 18.
  • the carriage 2 6 is disposed adjacent one end of the tubular memher and the rollers 42 are adjusted so that the flanges 54 just engage the surface of the tube or shaft 22. Point contact is established between each flange of each roller and the tube.
  • the chuck 14 is then rotated and thus the propeller shaft along with it, and the carriage 26 traverses the length of the propeller shaft 22 on the rails 20. This is caused by the skew of the rollers 42 relative to the axis of the propeller shaft 22.
  • the surface is deformed beyond its elastic limit at the local portions of eccentricity. Finite increments of the tube surface are deformed and displaced to the proper concentric position about the established axis of rotation of the tube. Since there is point contact of the rolls with the surface of the tube, greater unit pressures may be applied to the tube than has been heretofore possible with available straightening equipment.
  • the rolls and carriage 26 traverse the length of the tube deforming and moving the eccentric portions of the tube surface and thus straightening the tube. At the end of the tube the direction of rotation may be reversed for a second traverse of the length of the propeller shaft and additional deformation and realignment of the tube material.
  • FIGURE 4 illustrates a portion of a typical propeller shaft after the method above described has been applied.
  • a series of helical depressions 60 are formed, much the same as a thread formed on a bolt or the like.
  • the number of helical depressions is dependent upon the number of roller flanges and more or less than eight as above described may be found tobe desirable.
  • a method and apparatus for straightening a tubular member which is more economical and efficient than presently available equipment generally in use.
  • the straightening process is through local plastic deformation and realignment of the material from which the tube is made, to establish the proper centerline coincident with the axis of rotation of the tubular member.
  • the point contact provided by the rolls in traversing the length of the tubular member permits greater unit pressure or local pressures to be applied for the proper deformation and movement of surface material.
  • a method of straightening a tubular driveshaft comprising the steps of:
  • rollers placing two pairs of rollers about said tubular member and in point contact engagement therewith, said rollers being equidistant from the axis of said tubular member and movable inwardly toward said axis of said tubular member and having axes angularly disposed relative to the axis of said tubular member;
  • each of said rollers being substantially H-shaped in longitudinal cross-section to have two point contact with said tubular member, and said rollers having axes equidistant from the axis of said tubular member and angularly disposed with respect thereto;
  • Apparatus for straightening a tubular member having a longitudinal axis comprising:
  • rollers disposed circumferentially about said tubular member and equidistant from said axis, said rollers being substantially H-shaped in longitudinal cross-section to have two point contact with said tubular member, said rollers having axes angularly disposed relative to said axis of said tubular member and being movable radially inwardly toward said axis of said tubular member, said angularly disposed axes of said roller causing said rollers to be moved longitudinally along said tubular member by contact with and rotation of said tubular member; whereby said rollers traverse the length of said tubular member upon rotation thereof and locally deform eccentric portions of said tubular member beyond the elastic limit thereof and into concentricity with said axis of said tubular member.
  • rollers placing a plurality of rollers circumferentially disposed equidistance from the center of rotation of said end members at one end of said tubular member, said rollers having axes angularly disposed from the center of rotation;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Description

y 1966 R. F. DOLAN ETAL 3,253,444
METHOD AND APPARATUS FOR STRAIGHTENING TUBULAR MEMBERS Filed July 11, 1963 INVENTOR.
% gaff ATTORNEY United States Patent 3,253,444 METHOD AND APPARATUS FOR STRAIGHTEN- ENG TUBULAR MEMBERS Richard F. Dolan, Mount Clemens, and Frederick B. Hill, Utica, Mich, assignors to General Motors Corporation, Detroit, Mich, a corporation of Delaware Filed July 11, 1963, Ser. No. 294,279 Claims. (Cl. 72-107) This invention relates to a method and apparatus for straightening metal tubes.
In the design, manufacture and operation of many devices it is necessary to have a metal tubular member which is as nearly as possible concentric about its longitudinal axis. Typical of such devices is a motor vehicle which has a propeller shaft or driveshaft constructed of a tubular member with universal joints at opposite ends. In such an instance, it is desirable to have the tubular driveshaft as nearly concentric about the longitudinal axis as possible to provide true running, proper [balancing and little vibration.
Such shafts are formed from standard tube stock which must be straightened before it can be used. In the past it has been common to use contoured rollers traversing the tubular stock to straighten the tube relative to its longitudinal axis. The rolls are generally power driven to drive the tube past the rollers and the process requires bending and reverse bending of the tube about its axis with rotation of the tube as the bending occurs. The commonly employed method is slow and requires skilled and experienced operators to properly straighten the tube. Generally speaking, a large mechanical or hydraulic ram is required to [bend the tube and it is necessary to continue the process intermittently, measuring the eccentricity and concentricity following each ibending operation. With devices of this nature it is not possible to straighten the end sections of the tube, portions which may be particularly important in vehicle propeller shafts to prevent a disproportionate section of unbalance.
The method and device in which this invention is embodied comprises, generally, a machine for rotating the tubular member on its longitudinal axis and a plurality of rollers. disposed circumferentially about the tube and equidistant from the tube axis. The rolls are generally H-shaped in longitudinal cross-section to provide two point contact with the tubular member. As the rolls traverse the length of the tube they locally deform the surface of the tube beyond its elastic limit and move the surface into the proper relationship with the centerline of the propeller shaft. The surf-ace material is actually displaced to establish a centerline coincident with the axis of rotation of the tubular member.
This method and apparatus avoids most of the disadvantages of the presently known tube straightening equipment. With apparatus of this nature the workpiece is rotated rather than the roller members and the roller members are thus free to turn at will to provide the proper material movement. Straightening the tubular member is accomplished by plastic deformation of the metal in the area of contact between the tube and the roll in those parts of the tube that are eccentric relative to the tube axis.
These and other advantages Will become more apparent from the following description and drawing, in which:
FIGURE 1 is a perspectiveview of a machine capable of performing the method and showing the relative position of the various parts of the apparatus;
FIGURE 2 is a cross-sectional view of a portion of the apparatus illustrated in FIGURE 1, taken substantially along the line 22 of FIGURE 1, and looking in the direction of the arrows to show the tubular member and the disposition of the rollers thereabout;
3,253,444 Patented May 31, 1966 FIGURE 3 is a plan view of that portion of the apparatus shown in FIGURE 2, taken substantially along the line 3-3 of FIGURE 2, and looking in the direction of the arrows; and
FIGURE 4 is a perspective view of a portion of a vehicle propeller shaft which has been straightened by the apparatus of FIGURES 1-3.
Referring more particularly to the drawing, FIGURE 1 best illustrates a typical machine and apparatus for accomplishing the method. A machine frame, illustrated generally by the numeral 10, carries a suitable electric motor or other rotating device within the cabinet 12. The motor turns a typical chuck or the like 14 and may be controlled by a suitable control panel 16.
At the opposite end of frame 10 is a tailstock assembly, illustrated generally by the numeral 18; and connecting the engine cabinet and tailstock assembly are a plurality of machine rails 20.
Disposed between the chuck 14 and the tailstock assembly 18 is a tubular member, illustrated generally by the numeral 22, which, in the drawing for illustrative purposes, is shown to be a vehicle propeller shaft having universal joint halves 6, 8 secured to the respective ends thereof. One of the universal joint halves 6 on the one end of the shaft is mounted in chuck 14 and the other universal joint half 8 at the opposite end is received and rotatable in the tailstock assembly 18. Suitable adjustment means 24 for the tailstock 18 may be provided.
A carriage assembly, illustrated generally by the numeral 26, is mounted on rails 20 and contains the roller mounting cage 28. As will become hereinafter more apparent, carriage 26 traverses along the rails 20 by the action of the rollers on the tubular member so that the carriage 26 need not be operated under power.
The roller supporting cage 28 may be formed in any suitable manner and is shown for illustration purposes in FIGURES 2 and 3 to comprise side members 30 and 32. Disposed between the' side members are plates 34 to which are adjustably secured the roller assemblies, illustrated generallyby the numeral 36. An open area in the side members 30 and 32, as shown in FIGURE 2 at the upper left portion, is provided so that the tubular member may be inserted therein.
Roller assemblies 36 are shown to include a mounting plate 38, side plates 40 and rollers 42 which are rotatably secured in the side plates by pivot pins 44. It is important that the roller assemblies 36 be adjustable toward andaway from the tubular member 22 for purposes that will become hereinafter more apparent.
Any suitable adjustment means may be provided, and for purposes of illustration the device shown in FIGURE 3 will be described. This device includes a pair of dowel pins or locating pins 46 which are secured in the mounting plate 38 and received in suitable apertures in the cage cross member 34. A threaded bolt 48 and locking nut 50 are received on the cross members 34, the bolt 48 extending through the cross member 34 to engage the mounting plate 38. Rotation of the bolt 48 will obviously cause radial movement of the roller assembly 36 with respect to the'axis tubular member 22.
As noted in FIGURES 2 and 3, the rollers 42 are of generally H shape in their longitudinal cross-section, that is, the center portion 52 of the roller 42 is cylindrical, terminating in enlarged ends 54 which bear against the tubular member 22. The longitudinal axis 56 of each roll is angularly disposed or skewed with respect to the longitudinal axis 58 .of the tubular member 22. The amount of skew or angular displacement may be of any value but it has been determined that an angle of approximately 5 is most ellicient.
As noted in FIGURE 2, the four roller assemblies 42 are equally spaced about the circumference of the tubular member 22 and the axis of each roller 42 is equidistant from the tube centerline 58.
In operation the universal joint halves 6, 8 of the tubular member or driveshaft 22 are secured in the machine by means of the chuck 14 and the tailstock 18. The carriage 2 6 is disposed adjacent one end of the tubular memher and the rollers 42 are adjusted so that the flanges 54 just engage the surface of the tube or shaft 22. Point contact is established between each flange of each roller and the tube. The chuck 14 is then rotated and thus the propeller shaft along with it, and the carriage 26 traverses the length of the propeller shaft 22 on the rails 20. This is caused by the skew of the rollers 42 relative to the axis of the propeller shaft 22. As the flanges 54 of the rollers 42 traverse an eccentric portion of the tubular member, the surface is deformed beyond its elastic limit at the local portions of eccentricity. Finite increments of the tube surface are deformed and displaced to the proper concentric position about the established axis of rotation of the tube. Since there is point contact of the rolls with the surface of the tube, greater unit pressures may be applied to the tube than has been heretofore possible with available straightening equipment. The rolls and carriage 26 traverse the length of the tube deforming and moving the eccentric portions of the tube surface and thus straightening the tube. At the end of the tube the direction of rotation may be reversed for a second traverse of the length of the propeller shaft and additional deformation and realignment of the tube material.
FIGURE 4 illustrates a portion of a typical propeller shaft after the method above described has been applied. As noted, a series of helical depressions 60 are formed, much the same as a thread formed on a bolt or the like. The number of helical depressions is dependent upon the number of roller flanges and more or less than eight as above described may be found tobe desirable.
Thus, a method and apparatus for straightening a tubular member is provided which is more economical and efficient than presently available equipment generally in use. The straightening process is through local plastic deformation and realignment of the material from which the tube is made, to establish the proper centerline coincident with the axis of rotation of the tubular member. The point contact provided by the rolls in traversing the length of the tubular member permits greater unit pressure or local pressures to be applied for the proper deformation and movement of surface material.
What is claimed is:
1. A method of straightening a tubular driveshaft comprising the steps of:
mounting the driveshaft for rotation about its axial centerline;
placing several pairs of rollers about said driveshaft such that each roller has two point contact with said driveshaft, said rollers being equidistant from the centerline of said driveshaft and having axes of rotation angularly disposed with respect to said centerline;
and rotating said driveshaft to cause said rollers to traverse the length thereof and to locally deform the surface of said driveshaft beyond the elastic limit thereof and displace the eccentric portions of said driveshaft, said angularly disposed axes of said rollers causing said rollers to be moved longitudinally along said driveshaft by contact with and rotation of said driveshaft into concentricity with the centerline of said driveshaft.
2. The method of straightening a tubular member having a longitudinal axis comprising the steps of:
mounting the tubular member for rotation about said axis;
placing two pairs of rollers about said tubular member and in point contact engagement therewith, said rollers being equidistant from the axis of said tubular member and movable inwardly toward said axis of said tubular member and having axes angularly disposed relative to the axis of said tubular member;
and rotating said tubular member to cause said rollers to traverse the length thereof and to locally deform said tubular member beyond its elastic limit and displace the eccentric portions thereof into concentricity with the axis of said tubular member, said angularly disposed axes of said rollers causing said rollers to be moved longitudinally along said tubular member by contact with and rotation of said tubular member.
3. The method of straightening a tubular member having a longitudinal axis and concentric and eccentric portions relative .to said axis, comprising the steps of:
mounting the tubular member for rotation about said axis;
placing four rollers about said tubular member and equally spaced about the circumference of said tubular member, each of said rollers being substantially H-shaped in longitudinal cross-section to have two point contact with said tubular member, and said rollers having axes equidistant from the axis of said tubular member and angularly disposed with respect thereto;
moving said rollers radially inwardly toward the axis of said tubular member a distance adequate to deform the eccentric portions of said tubular member;
and rotating said tubular member to cause said rollers to traverse the length thereof and to locally deform the eccentric portions of said tubular member beyond the elastic limit thereof into concentricity with the axis of said tubular member, said angularly disposed axes of said rollers causing said rollers to be moved longitudinally along said tubular member by contact with and rotation of said tubular member.
4. Apparatus for straightening a tubular member having a longitudinal axis comprising:
means for mounting and rotating said tubular member about .said axis; a plurality of rollers disposed circumferentially about said tubular member and equidistant from said axis, said rollers being substantially H-shaped in longitudinal cross-section to have two point contact with said tubular member, said rollers having axes angularly disposed relative to said axis of said tubular member and being movable radially inwardly toward said axis of said tubular member, said angularly disposed axes of said roller causing said rollers to be moved longitudinally along said tubular member by contact with and rotation of said tubular member; whereby said rollers traverse the length of said tubular member upon rotation thereof and locally deform eccentric portions of said tubular member beyond the elastic limit thereof and into concentricity with said axis of said tubular member. 5. A method of straightening a drive shaft assembly having a tubular driveshaft member and a universal joint member secured to each end of said tubular member, whereby the axis of said tubular member is to be made concentric with the axis of said end members, comprising the steps of:
mounting the driveshaft assembly for rotation about the axial center of rotation of said end members;
placing a plurality of rollers circumferentially disposed equidistance from the center of rotation of said end members at one end of said tubular member, said rollers having axes angularly disposed from the center of rotation;
moving said rollers radially inwardly toward the axial center of rotation of said end member a distance ade- 5 6 quate to deform the eccentric portions of said drive- References Cited by the Examiner d h ft b1 UNITED STATES PATENTS rotating sa1 rives a assem y; 1 E 7 33 I and moving said rollers longitudinally along the length 313 gggggz z of said tubular member, said angularly disposed axes 5 2:991:67Q 7/1961 Meyer of said rollers causing said rollers to be moved lon- 3,137,926 6/1964 Barlow gitudinally along said tubular members by such rotation and by contact with said tubular member, and FOREIGN PATENTS locally deforming the eccentric portions of said drive- 10 34,713 10/1394 yshaft beyond the elastic limit thereof and aligning I the axis of said drive shaft with the axis of said end CHARLES LANHAM Pr'mary Exammer' member. H. D. HOINKES, Assistant Examiner.

Claims (1)

1. A METHOD OF STRAIGHTENING A TUBULAR DRIVESHAFT COMPRISING THE STEPS OF: MOUNTING THE DRIVESHAFT FOR ROTATION ABOUT ITS AXIAL CENTERLINE; PLACING SEVERAL PAIRS OF ROLLERS ABOUT SAID DRIVESHAFT SUCH THAT EACH ROLLER HAS TWO POINT CONTACT WITH SAID DRIVESHAFT, SAID ROLLERS BEING EQUIDISTANT FROM THE CENTERLINE OF SAID DRIVESHAFT AND HAVING AXES OF ROTATION ANGULARLY DISPOSED WITH RESPECT TO SAID CENTERLINE; AND ROTATING SAID DRIVESHAFT TO CAUSE SAID ROLLERS TO TRAVERSE THE LENGTH THEREOF AND TO LOCALLY DEFORM THE SURFACE OF SAID DRIVESHAFT BEYOND THE ELASTIC LIMIT THEREOF AND DISPLACE THE ECCENTRIC PORTIONS OF SAID DRIVESHAFT, AND ANGULARLY DISPOSED AXES OF SAID ROLLERS CAUSING SAID ROLLERS TO BE MOVED LONGITUDINALLY ALONG SAID DRIVESHAFT INTO CONCENTRICITY WITH AN ROTATION OF SAID DRIVESHAFT INTO CONCENTRICITY WITH THE CENTERLINE OF SAID DRIVESHAFT.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040231381A1 (en) * 2001-08-20 2004-11-25 Juranitch James C Shaft truing system
US20040231121A1 (en) * 2001-08-20 2004-11-25 Juranitch James C True vehicle running center shaft assembly system
US20080041201A1 (en) * 2006-02-22 2008-02-21 Hess Engineering, Inc. Vertical spinner
US9616477B2 (en) * 2013-10-15 2017-04-11 Ellwood National Investment Corp. Open containment frame for roller applied deep compression treatment of shaft products

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE84713C (en) *
US1901516A (en) * 1929-11-14 1933-03-14 Kellogg M W Co Method and machine for rolling fins on tubes
US2103574A (en) * 1934-06-12 1937-12-28 John B Wintercorn Positively controlled tube bore mandrel for tube forming machines
US2991672A (en) * 1958-05-16 1961-07-11 Maag Zahnraeder & Maschinen Ag Machine for the cold form generating of cylindrical workpieces
US3137926A (en) * 1957-04-02 1964-06-23 Fairey Eng Formation of fins on metal bar or tube stock

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE84713C (en) *
US1901516A (en) * 1929-11-14 1933-03-14 Kellogg M W Co Method and machine for rolling fins on tubes
US2103574A (en) * 1934-06-12 1937-12-28 John B Wintercorn Positively controlled tube bore mandrel for tube forming machines
US3137926A (en) * 1957-04-02 1964-06-23 Fairey Eng Formation of fins on metal bar or tube stock
US2991672A (en) * 1958-05-16 1961-07-11 Maag Zahnraeder & Maschinen Ag Machine for the cold form generating of cylindrical workpieces

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040231381A1 (en) * 2001-08-20 2004-11-25 Juranitch James C Shaft truing system
US20040231121A1 (en) * 2001-08-20 2004-11-25 Juranitch James C True vehicle running center shaft assembly system
US7162903B2 (en) * 2001-08-20 2007-01-16 Veri-Tek International Corporation Shaft truing system
US7275295B2 (en) * 2001-08-20 2007-10-02 Veri-Tek International Corporation True vehicle running center shaft assembly system
US20080041201A1 (en) * 2006-02-22 2008-02-21 Hess Engineering, Inc. Vertical spinner
US7963199B2 (en) * 2006-02-22 2011-06-21 Hess Industries, Inc. Vertical spinner
US9616477B2 (en) * 2013-10-15 2017-04-11 Ellwood National Investment Corp. Open containment frame for roller applied deep compression treatment of shaft products

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