US3186204A - Ball rolling apparatus - Google Patents

Ball rolling apparatus Download PDF

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Publication number
US3186204A
US3186204A US270711A US27071163A US3186204A US 3186204 A US3186204 A US 3186204A US 270711 A US270711 A US 270711A US 27071163 A US27071163 A US 27071163A US 3186204 A US3186204 A US 3186204A
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United States
Prior art keywords
bar
discs
disc
rolled
spiral
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Expired - Lifetime
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US270711A
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English (en)
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Kikuchi Takefusa
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Individual
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Individual
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Classifications

    • 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
    • B21H1/14—Making articles shaped as bodies of revolution balls, rollers, cone rollers, or like bodies

Definitions

  • steel balls have been manufactured by die or stamp forging with such forging apparatus of a large size, such as drop hammers, crank presses or upsetting machines.
  • trimming machines are also necessary to cut off fins, which are inevitably generated between the joint of a pair of dies. The fins thus cut off, are then scrapped, causing loss of material.
  • the process requires skilled forging technique.
  • This invention can eliminate all defects of conventional forging process and affords an efficient and precise ball rolling apparatus.
  • FIG. 1 is the front view
  • FIG. 2 is the side view of the ball rolling apparatus.
  • FIG. 3 shows the sectional view along the line IIIIII in FIG. 1, FIG. 4, the sectional view along the line IV-IV in FIG. 3, FIG. 5, the developed sectional view along the line VV in FIG. 4, and FIG. 6 and FIG. 7, the sectional view along the line VI-VI and VII-VII respectively in FIG. 5.
  • FIG. 8 shows how a round bar is rolled and changes to a ball.
  • FIG. 9-FIG. 12 show another embodiment of this invention. The description of this embodiment will be given later.
  • the rolling apparatus consists mainly of a pair of circular rolling discs 1 and 2, which have respectively a ridge 3 and 4, each being of a constantly increasing height and of a same shape and size as represented in FIGS. 3, 6 and 7. Each of these ridges forms a spiral of an equal form on the surface of the discs 1 and 2 as shown in the FIGS. 1, 3, 4 and 5.
  • a spiral groove 5 and a spiral groove 6 are formed respectively on the surfaces of the discs 1 and 2, as shown in FIGS. 2, 3, 4, 6 and 7.
  • the disc I and disc 2 which are rotatively supported concentrically through their respective axles 11 and 12, by their respective bearings 9 and It), are arranged so that the discs face parallel with each other as shown in FIG. 1, FIG. 2 and FIG. 3, and that the spiral ridges and grooves as above described to face with each other against the horizontal axis IIIIII as shown in FIG. 1.
  • the height of the spiral ridge 3 becomes gradually higher from its beginning point a on the circumference of the disc 1 to its maximum height b near the disc center and then maintains this height up to a point 0, the end of the spiral 3.
  • the height of the spiral ridge 4 on the disc 2 is the same as that of the spiral ridge 3, while a, b and c on the ridge 4 correspond to a, b and c on the ridge 3 respectively.
  • the shape of the groove is maintained semicircular in cross section, where the height of the ridge is kept constant at its maximum height.
  • the discs 1 and 2 with the spiral ridges 3 and 4 and the spiral grooves 5 and 6 respectively are placed face to face and parallel with each other as already described, so that the tips of the highest parts of ridges contact each other, and so that the ridges and circular grooves of two discs make a compiete circular tunnel at the rolling point.
  • the two discs 1 and 2 being so arranged as above described, are rotated at the same speed in the opposite direction by suitable rotating means 20, where disc I, as represented in FIG. 4, rotates counterclockwise and disc 2 rotates clockwise.
  • the axle 11 of the disc 1 is a hollow shaft having a hole 13 therethrough, as shown in FIGS. 2, 3 and 4, through which the rolled balls are discharged out of the apparatus.
  • a red heated bar 7 is inserted into the apparatus between the two discs, which are rotating in the opposite direction, as shown in FIGS. 1, 2 and 3.
  • the bar 7 is caught by the spiral ridges 3 and 4 at or near their beginning points a and a and at the same time a depression 8 begins to be indented, in the heated bar 7, and the bar is driven to rotate and is rolled between two discs by the ridges and grooves of the discs.
  • FIG. 8(2b) shows the rolled state at the end of the 1st revolution of the discs.
  • FIG. 8(2b) shows the rolled state at the beginning of 2nd revolution.
  • the depressions S and 8 are indented deeper by the ridges 3 and 4 of the revolving discs, till at last, at the end of 2nd revolution, the bar is rolled to a form as shown by FIG. 8(2e).
  • FIG. 8(3b) shows the rolled state of the bar, where the ridges have just gripped the bar and have begun to indent a 3rd depression 8 and to roll a 3rd portion 7 As the discs rotate further, the portions 7 7 and '7 are rolled further, and depressions 8 8 and 8 are indented deeper and deeper, till at last the 1st portion 7 reaches the :points b and b of the discs, where the ridges 3 and 4 become highest and the grooves 5 and 6 become semicircle in the cross section.
  • the resultant rolled sphere 7 will then further be driven towards the centre and to be discharged out of the apparatus through the discharging hole 13, as shown in FIGS. 1, 2, 3 and 4.
  • FIGS. 9, 10, 11 and 12 show another embodiment of this invention which eliminate such pulling of the bar as described above.
  • FIG. 9 is the front view
  • FIG. 10 is the side view
  • FIG. 11 is the sectional view along the line XIXI
  • FIG. 12 shows the relative movement of a round bar and the apparatus as shown in FIGS. 9, 10, and 11, showing how the former is rolled by the latter.
  • axles of the discs 1 and 2 are arranged to be eccentric with respect to each other.
  • FIGS. 9, 10, 11 and 12, 0 and 0 0 being respectively the center lines of axles of the discs 1 and 2, are eccentrically located at a distance 6 from one another and are parallel with respect to each other; 0 0 is a straight line which lies between and at an equal distance 6/ 2 from the center lines and therefore is in one plane with these two centre lines.
  • the bar 7 is inserted between the discs 3 and 4, so that its longitudinal center line coincides with the straight line 0 0
  • These center lines 0 0 0 and 0 0 intersect the surface which contains the tip of the spiral ridge 3 at 0 0 and 0 respectively.
  • these center lines 0 0 0 0 and 0 0 intersect another surface which contains the tip of the spiral ridge 4 at 0 0 and 0 (These 3 points are not shown in the drawings)
  • the tips of these two ridges are very close and touch each other at their highest regions, and therefore it may practically be assumed that these surfaces are plane, and that three points 0 0 and 0 coincide respectively with 0 0 and 0 in one plane.
  • P is the point of contact at which the spiral ridge 3 touches with the circumference of the bar 7;
  • NN is a straight line parallel to the bar passing through the point of contact P;
  • TT is a line normal to the line P0 p is the distance between the point 0 and the point of contact P;
  • V is the peripheral speed of the bar 7 when the disc 1 rotates at an angular velocity (0 V and V are, respectively, the components of the velocity V towards directions T1 and NN; 0 is the angle between the velocity V and TI;
  • P is the contacting point at which the bar 7 contacts the ridge 4 of the disc 2; and V; and V, V and V correspond respectively to V, V, and V of the point P as already described.
  • the disc 1 rotates counterclockwise at angular velocity to around its center 0 and the disc 2 rotates around its center 0 clockwise at the same angular velocity.
  • the apparatus as well as the process are very simple, and many finished balls may be rolled successively and automatically out of a heated bar, with high production efficiency, eliminating wastes in bar material, in heating, in labor and in the investment in the apparatus.
  • the halls thus manufactured are not only of high accuracy but also of super quality because the bar is gradually rolled to a finished ball without cutting its fibers. Therefore, the fibres structure of balls, which are thus rolled out of a bar with parallel fibre structure, becomes very nearly concentric around its center. Such fibre structure as symmetrical to the center is the ideal, which gives the best mechanical properties to a ball.
  • the apparatus above described is adapted to roll spherical balls. It is also possible within the scope of the invention to provide apparatus with discs having spiral ridges and grooves of other shapes in cross section to roll pieces of any other surfaces of revolution.
  • An apparatus for roll forming balls comprising a first circular disc having on its working surface a spiral ridge of gradually increasing height and decreasing Width from its periphery to the center thereof defining an adjacent spiral groove of gradually increasing depth and increasing width, a second circular disc positioned in facing relationship to said first circular disc, said second disc having the same size and shape as said first disc, means rotatively supporting said discs in facing spaced relationship so that the tips of the highest regions of said spiral ridges approach contact with each other, and means to rotate said discs in opposite directions at equal angular velocities.
  • spiral ridges begin at a point inside the periphery of said circular disks, said ridges having zero height at said periphery and a height equal to the radius of the balls to be roll formed at said tips of said highest regions of said spiral ridges, said tips just touching each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Metal Rolling (AREA)
US270711A 1962-07-26 1963-04-04 Ball rolling apparatus Expired - Lifetime US3186204A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3170662 1962-07-26

Publications (1)

Publication Number Publication Date
US3186204A true US3186204A (en) 1965-06-01

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ID=12338493

Family Applications (1)

Application Number Title Priority Date Filing Date
US270711A Expired - Lifetime US3186204A (en) 1962-07-26 1963-04-04 Ball rolling apparatus

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US (1) US3186204A (de)
CH (1) CH428640A (de)
DK (1) DK109029C (de)
GB (1) GB1012307A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000056480A1 (de) * 1999-03-24 2000-09-28 Wolfgang Jung Verfahren zur herstellung von stahlkugeln
US20070022795A1 (en) * 2005-07-26 2007-02-01 Kabushikikaisha Sanmei Seisakusho Rolling die and a method of making a rod with a ball portion
CN101590509B (zh) * 2009-06-08 2010-11-24 常熟市非凡金属制品有限公司 棒材轧球机的成球机构的导板与导板座的配合结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US385186A (en) * 1888-06-26 Die for rolling articles of metal
US672664A (en) * 1900-06-02 1901-04-23 Adolf Mandel Machine for manufacturing balls or other bodies.
US1665361A (en) * 1925-02-24 1928-04-10 Hodge George Orvil Machine for forming balls
US1691248A (en) * 1928-11-13 Canada
US1746671A (en) * 1928-01-16 1930-02-11 Alexander C Munro Ball-forming machine
DE512127C (de) * 1928-02-23 1930-11-27 Maier Johann Vorrichtung zum Walzen, insbesondere von vorgeballten Stahlkugeln, mit Hilfe von mit halbkreisfoermigen Rillen versehenen Walzwerkzeugen aus Stahl

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US385186A (en) * 1888-06-26 Die for rolling articles of metal
US1691248A (en) * 1928-11-13 Canada
US672664A (en) * 1900-06-02 1901-04-23 Adolf Mandel Machine for manufacturing balls or other bodies.
US1665361A (en) * 1925-02-24 1928-04-10 Hodge George Orvil Machine for forming balls
US1746671A (en) * 1928-01-16 1930-02-11 Alexander C Munro Ball-forming machine
DE512127C (de) * 1928-02-23 1930-11-27 Maier Johann Vorrichtung zum Walzen, insbesondere von vorgeballten Stahlkugeln, mit Hilfe von mit halbkreisfoermigen Rillen versehenen Walzwerkzeugen aus Stahl

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000056480A1 (de) * 1999-03-24 2000-09-28 Wolfgang Jung Verfahren zur herstellung von stahlkugeln
US20070022795A1 (en) * 2005-07-26 2007-02-01 Kabushikikaisha Sanmei Seisakusho Rolling die and a method of making a rod with a ball portion
US7278286B2 (en) * 2005-07-26 2007-10-09 Kabushikikaisha Sanmei Seisakusho Rolling die and a method of making a rod with a ball portion
CN101590509B (zh) * 2009-06-08 2010-11-24 常熟市非凡金属制品有限公司 棒材轧球机的成球机构的导板与导板座的配合结构

Also Published As

Publication number Publication date
GB1012307A (en) 1965-12-08
DK109029C (da) 1968-03-11
CH428640A (de) 1967-01-31

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