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US3348338A - Apparatus for lapping and grinding balls - Google Patents

Apparatus for lapping and grinding balls Download PDF

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Publication number
US3348338A
US3348338A US351017A US35101764A US3348338A US 3348338 A US3348338 A US 3348338A US 351017 A US351017 A US 351017A US 35101764 A US35101764 A US 35101764A US 3348338 A US3348338 A US 3348338A
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US
United States
Prior art keywords
balls
magazine
lapping
discs
grooves
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.)
Expired - Lifetime
Application number
US351017A
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English (en)
Inventor
Messerschmidt Scbastian
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Individual
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Individual
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Publication date
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Publication of US3348338A publication Critical patent/US3348338A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B11/00—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
    • B24B11/02—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls
    • B24B11/04—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels
    • B24B11/06—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels acting by the front faces, e.g. of plane, grooved or bevelled shape

Definitions

  • Ciaims. (Ci. 51-3)
  • the invention relates to the lapping and grinding of balls lbetween counteracting discs with concentric grooves guiding the balls, the balls being fed at each revolution in continuous succession to one side of a magazine and again removed at the other side thereof.
  • Drum magazines do not separate the lapped, unlapped and more or less lapped balls, but mix these indiscriminately.
  • the result is that the balls are worked unequally, because only the -balls having the largest diameter are actually lapped, whereas the others revolve idly with the discs.
  • the unequal lball diameters result, however, in badly shaped grooves, which in turn impairs the work.
  • the objections to the use of the bucket elevator as magazine differ only slightly from those inherent to the rotary drum, because the balls are here not fed without exception to a common stock in the magazine but are divided up into quantities corresponding to the number of buckets. However the mixing of the ground and unground balls cannot be avoided.
  • the object of the invention is to provide an apparatus which will produce balls with considerably less expenditure but with a very greatly improved degree of accuracy.
  • the invention also provides that the balls in the individual paths of travel are transferred at each delivery to or removal from the magazine. Which possibility is preferred will depend to a great extent upon the circumstances of the case in question. Thereby the balls of each groove or group of grooves are guided into the next following groove or group of grooves with the next larger or next smaller radius, whereas the balls in the outermost or innermost groove or group of grooves are fed into the lirst or last, that is the innermost or outermost groove or group of grooves, passing over all other paths of travel.
  • the construction of an apparatus provides that the magazine has a number of compartments corresponding to the number of grooves 'or groups of grooves in the discs and is connected at both sides to the aperture of the discs by means of guide paths subdivided in a similar manner.
  • the invention assumes that it is known to remove the balls alternately from their path of travel Ibetween the discs and to reintroduce them into the machine in a dif- .ferent sequence or in different grinding grooves.
  • grooved paths of travel are provided Iwhich vform an extension of the aperture of the discs.
  • another feature consists in that one of the outer tracks of yone guide path leads in known manner to the other outer side of the guide path passing over or under the other tracks in the process.
  • the balls passing out from between the discs one after another are moved forward in the guide paths -by the motion imparted to them between the discs. If necessary, however, special motive elements may also be provided, particularly at the places where the guide paths ascend.
  • a particularly advantageous embodiment of the invention consists in the employment of a plate-shaped magazine surrounding the discs in the form of a ring.
  • a plate-shaped magazine surrounding the discs in the form of a ring.
  • Such a magazine can cooperate either with horizontally running discs or with vertically upright discs.
  • the plate can also be provided with a number of grooves corresponding to the grooves of the discs.
  • the plate it is also possible for the plate to have stationary concentrically arranged partition walls corresponding to the grooves or groups of grooves of the discs and forming an extension of the partition walls of the guide paths.
  • a magazine plate with partition walls between the individual paths of travel is aat-asas suitable chiefly for working balls of smaller diameter, in which case, however, it is advisable for several grooves to be assembled side by side on the discs and coordinated to a path of travel of the magazine subdivision.
  • FIG. 1 is a top plan view of the 1'irst embodiment
  • FIG. 2 a section on line II-II of FIG. 1,
  • FIG. 3 a top plan view of a second embodiment
  • FIG. 4 a part section of the embodiment of FIG. 3, and
  • FIG. 5 a part section through yet another embodiment.
  • FIGS. l to 4 a lapping disc arrangement provided with four rows of grooves is shown. This construction is, however, only an example which, as can be seen from FIG. 5, can be extended to discs with any desired number of grooves, but the diameter ofthe balls to be worked is the deciding factor. k
  • FIGS. l and 2 two concentrically arranged lapping discs are provided, the lower disc 1 of which rotates with its holder 2, while the upper disc 3 is stationary with its holder 4. While in the example illustrated the lower lapping disc 1 has four grooves 5 for guiding the balls 6, the upper lapping disc 3 has a fiat working surface 7.
  • the upper stationary lapping disc 3 has a sector-shaped aperture 8 corresponding to an angle of 70'a as shown in FIG. l.
  • the two lapping discs 1 and 3 are arranged eccentrically within a ring-shaped plate magazine 9, the centres of the discs 1 and 3 on the one hand and of the ringshaped magazine 9 on the other hand being mutually displaced by an amount x on the diamater which forms the angle bisector of the aperture S of the upper lapping disc 3.
  • the direction in which the lapping disc 1 rotates is indicated by the arrow 11.
  • the ring-shaped magazine 9 rotates in the opposite direction as indicated by the arrow 12.
  • the drives for the rotary lapping disc 1 and the ringshaped magazine 9 are not shown in detail as they are well known.
  • the ring-shaped magazine 9 is subdivided corresponding to the number of grooves of the lapping disc 1 into four paths of travel 13, 14, and 16, the path 13 having the smallest and the path 16 the largest radius.
  • These paths 13 to 16 are formed by partition walls 17 which are supplemented by the outer wall 13 rotating with the ring-shaped magazine 9 and the stationary inner wall 19.
  • the concentric partition walls 17 are also stationary and held by the supports 20. As can be seen from FIG. 2, the partition walls 17 terminate at a short distance from the bearing surface 21 of the magazine ring 9.
  • the paths of travel 13 to 16 of the ring-shaped magazine 9 are connected at one end to one side of the aperture 8 in the upper disc 3 by guide paths designated as aY whole by 22 and at the other end to the other side of this aperture by guide paths designated as a whole by 23.
  • the guide paths 22 and 23 are subdivided in a manner corresponding to the magazine 9 and the subdivision of grooves in the lapping disc 1.
  • the partition walls 17 are bent through an angle of 180 at their ends in a plane common with the ring-shaped magazine 9 and the lapping discs 1 and 3, so that in the case of the guide path 22 first three paths are formed which are designated by 24, 25 and 26.
  • the path 26 is bordered on the outer side by a stationary curved piece 27 which extends to the outer wall 18 of the magazine ring 9.
  • Coordinated to the groove 5 of the lapping disc 1 with the smallest radius is a groove 2S in the guide path 22 of U-shaped cross-section which ascends from its outlet point 29 in such a way that it finally crosses the paths 24 to 26 of the guide paths 22 before leading into the path of travel 13 of the magazine 9 which also has the smallest radius.
  • the guide path 23 is constructed like the guide path 22 at the other cross-over from the lapping discs 1, 3 to the magazine 9. VIn this case only the ends of the partition walls 17 are bent through an angle of 180 parallel to each other so that the individual tracks or paths 31, 32, 33 and 34 are formed and another curved piece 35 serves as boundary for the path 34 and is arranged stationary corresponding to the curved piece 27 on the other sidc so that it terminates in the proximity of the outer wall oi the ring magazine 9.
  • the path of travel 13 of the maga zine 9 with the smallest radius passes over the guide path 31 to the groove of the lapping disc 1 with the largest radius.
  • the path of travel 16 of the magazine 9 with the largest radius passes over from the guide path 34 to the groove 5 of the lapping disc 1 with the smallest radius.
  • FIG. 3 corresponds in principle to that shown in FIGS. 1 and 2.
  • the balls in the magazine travel in clockwise direction and in the zone of the lapping discs in anticlockwise direction, whereas in the embodiment shown in FIG. 3 the direction of travel remains the same.
  • the guide paths designated by '38 and 39 cross each other.
  • the guide path 38 is formed by the parallel partition walls 40 which extend in a plane parallel to the ring magazine 9.
  • the guides 41, 42, 43 and 44 are thus formed which conduct the balls, not shown, between the lapping discs 1 and 3.
  • the guide path 39 is composed of four parallel grooves 46, 47, 48 and 49 which commencing at the point 45 ascend as a whole and thereby cross the guide path 38.
  • the groove or path 46 corresponding to the inner groove 5 of the lapping disc 1 leads to the second path of travel 14 of the magazine 9 seen from the inner side, while the guide or groove 49 of the guide 39 crosses the inner tracks 46, 47 and 48 and :at S0 leads into the path of travel 13 of the ring magazine 9 with the smallest diameter. In this manner the balls are always transferred to the next following path of travel on completing each revolution.
  • the concentric subdivisions of the ring magazine instead of being formed by the partition walls 17 of the embodiment shown in FIGS. 1 and 2, are formed by grooves 51 the construction, arrangement and number of which corresponds to those of the grooves S in the lapping disc 1.
  • FIG. 5 shows diagrammatically a form of construction which is intended for working balls of smaller diameter.
  • a separate path f travel is not provided on the guides 22, 23 or 38, 39 for each individual groove 52 of the lapping disc 53, but these grooves 52 are assembled in groups, the number of groups corresponding to the subdivision of the ring magazine which in this construction is subdivided into four paths of travel 13 to 16 in the manner shown in FIG. 1.
  • Apparatus for lapping and grinding a plurality of balls comprising in combination:
  • magazine means including an annular rotatable base eccentrically arranged with respect to said discs, said magazine also including means dening a plurality of guiding channels for the balls to be ground and lapped, the number of channels being equal to the number of grooves in said disc;
  • said magazine including means for leading balls out of one groove on said disc, around one of said guiding channels, reinserting said balls in a different one of said grooves in sequential progression so that each ball travels the same path length around each groove between said discs and through the channels in said magazine and each ball traverses each of said grooves and channels in succession.
  • said means defining said guide channels in said magazine comprises a plurality of ⁇ annular concentrically arranged partitions stationarily disposed above and contiguous to said 15 base.
  • Apparatus as defined by claim 1 in which said means defining said guide channels in said magazine comprises a plurality of annular concentrically arranged grooves in the upper surface of said annular rotatable base.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US351017A 1963-03-15 1964-03-11 Apparatus for lapping and grinding balls Expired - Lifetime US3348338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM56126A DE1215549B (de) 1963-03-15 1963-03-15 Leiteinrichtung fuer eine Vorrichtung zum Laeppen und Schleifen von Kugeln

Publications (1)

Publication Number Publication Date
US3348338A true US3348338A (en) 1967-10-24

Family

ID=7308506

Family Applications (1)

Application Number Title Priority Date Filing Date
US351017A Expired - Lifetime US3348338A (en) 1963-03-15 1964-03-11 Apparatus for lapping and grinding balls

Country Status (6)

Country Link
US (1) US3348338A (xx)
AT (1) AT248274B (xx)
CH (1) CH420901A (xx)
DE (1) DE1215549B (xx)
GB (1) GB986187A (xx)
SE (1) SE311838B (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579911A (en) * 1968-06-05 1971-05-25 Floyd Steinmetz Ball bearing lapping machine
US3660942A (en) * 1970-10-27 1972-05-09 Sebastian Messerschmidt Ball lapping device
US3841029A (en) * 1972-03-29 1974-10-15 Shionogi & Co Apparatus for chamfering tablets
US5315791A (en) * 1991-06-18 1994-05-31 Tsubakimoto Precision Products Co., Ltd. Steel ball machining apparatus capable of eliminating foreign matter
US5353550A (en) * 1991-06-18 1994-10-11 Isubakimoto Precision Products Co. Ltd. Steel ball polishing apparatus
US6110023A (en) * 1998-04-02 2000-08-29 Nsk Ltd. Sphere grinding apparatus
CN101249624B (zh) * 2008-03-26 2010-06-23 河南省星彩滚动体有限责任公司 曲面型铲球板
US20130017763A1 (en) * 2009-12-01 2013-01-17 Kazushige Takaishi Wafer polishing method
CN103567853A (zh) * 2012-08-07 2014-02-12 安顺市虹翼特种钢球制造有限公司 立式研磨机用舌式导流板

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123551C2 (de) * 1981-06-13 1983-04-07 Kernforschungsanlage Jülich GmbH, 5170 Jülich Vorrichtung zum Abtragen der Außenschale von Kugeln
HUT47878A (en) * 1987-05-08 1989-04-28 Magyar Goerdueloecsapagy Mueve Ball lapping machine for fine surfacing bearing balls

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190708541A (en) * 1907-04-12 1908-04-09 William Hillman Improvements in Machines for Grinding Balls.
US947249A (en) * 1909-07-29 1910-01-25 New Departure Mfg Co Grinding-machine.
US949912A (en) * 1908-07-23 1910-02-22 New Departure Mfg Co Ball-grinding machine.
US967918A (en) * 1909-01-27 1910-08-23 Carl Albert Hirth Ball-grinding machine.
US1166264A (en) * 1915-02-16 1915-12-28 Hoffman Mfg Company Ltd Machine for grinding balls.
US1548563A (en) * 1922-10-06 1925-08-04 Blanchard Machine Company Means for handling articles
US1767416A (en) * 1922-06-27 1930-06-24 New Departure Mfg Co Grinding machine and interchanger therefor
US1772365A (en) * 1923-09-28 1930-08-05 New Departure Mfg Co Abrading machine
US2766556A (en) * 1950-11-28 1956-10-16 Messerschmidt Sebastian Work piece storage place for lapping machines
US2828582A (en) * 1954-02-15 1958-04-01 Messerschmidt Sebastian Magazines for lapping machines

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE228786C (xx) *
DE284561C (xx) *
DE294871C (xx) *
DE349405C (de) * 1918-10-07 1922-03-02 Skf Svenska Kullagerfab Ab Maschine zum Schleifen der Mantelflaechen kegeliger Rollen
US1418887A (en) * 1920-10-15 1922-06-06 Fafnir Bearing Co Ball-lapping machine
DE392939C (de) * 1923-03-08 1924-04-02 August Burchardt Kugelschleifmaschine nach Patent 370201 mit Zwischenring
DE1059313B (de) * 1957-01-10 1959-06-11 Sebastian Messerschmidt Kugelschleifmaschine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190708541A (en) * 1907-04-12 1908-04-09 William Hillman Improvements in Machines for Grinding Balls.
US949912A (en) * 1908-07-23 1910-02-22 New Departure Mfg Co Ball-grinding machine.
US967918A (en) * 1909-01-27 1910-08-23 Carl Albert Hirth Ball-grinding machine.
US947249A (en) * 1909-07-29 1910-01-25 New Departure Mfg Co Grinding-machine.
US1166264A (en) * 1915-02-16 1915-12-28 Hoffman Mfg Company Ltd Machine for grinding balls.
US1767416A (en) * 1922-06-27 1930-06-24 New Departure Mfg Co Grinding machine and interchanger therefor
US1548563A (en) * 1922-10-06 1925-08-04 Blanchard Machine Company Means for handling articles
US1772365A (en) * 1923-09-28 1930-08-05 New Departure Mfg Co Abrading machine
US2766556A (en) * 1950-11-28 1956-10-16 Messerschmidt Sebastian Work piece storage place for lapping machines
US2828582A (en) * 1954-02-15 1958-04-01 Messerschmidt Sebastian Magazines for lapping machines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579911A (en) * 1968-06-05 1971-05-25 Floyd Steinmetz Ball bearing lapping machine
US3660942A (en) * 1970-10-27 1972-05-09 Sebastian Messerschmidt Ball lapping device
US3841029A (en) * 1972-03-29 1974-10-15 Shionogi & Co Apparatus for chamfering tablets
US5315791A (en) * 1991-06-18 1994-05-31 Tsubakimoto Precision Products Co., Ltd. Steel ball machining apparatus capable of eliminating foreign matter
US5353550A (en) * 1991-06-18 1994-10-11 Isubakimoto Precision Products Co. Ltd. Steel ball polishing apparatus
US6110023A (en) * 1998-04-02 2000-08-29 Nsk Ltd. Sphere grinding apparatus
CN101249624B (zh) * 2008-03-26 2010-06-23 河南省星彩滚动体有限责任公司 曲面型铲球板
US20130017763A1 (en) * 2009-12-01 2013-01-17 Kazushige Takaishi Wafer polishing method
US8900033B2 (en) * 2009-12-01 2014-12-02 Sumco Corporation Wafer polishing method
CN103567853A (zh) * 2012-08-07 2014-02-12 安顺市虹翼特种钢球制造有限公司 立式研磨机用舌式导流板

Also Published As

Publication number Publication date
AT248274B (de) 1966-07-25
GB986187A (en) 1965-03-17
SE311838B (xx) 1969-06-23
CH420901A (de) 1966-09-15
DE1215549B (de) 1966-04-28

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