US2005718A - Grinding - Google Patents

Grinding Download PDF

Info

Publication number
US2005718A
US2005718A US571188A US57118831A US2005718A US 2005718 A US2005718 A US 2005718A US 571188 A US571188 A US 571188A US 57118831 A US57118831 A US 57118831A US 2005718 A US2005718 A US 2005718A
Authority
US
United States
Prior art keywords
grinding
polishing
lens
grinder
tool
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
US571188A
Other languages
English (en)
Inventor
Desenberg Josef
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2005718A publication Critical patent/US2005718A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made

Definitions

  • the grinding grains are thus mainly distributed over such lines which (lines) never appear as intersecting curves both on the lens and on the grinder simultaneously inasmuch as the speed etc of the lens and grinder do not co-incide.
  • the method of executing the work is such that in coarse or fine grinding (also smoothing or pre-polishing) firstly one makes very short grinding strokes on the lens and then when finally polishing (or smoothing or pre-polishing) either short polishing strokes on the grinder or by oscillation etc special spiral or oscillatory curve strokes.
  • the procedure to effect comparatively-short point lines simultaneously upon the lens and upon the grinder can also be effected by giving a greater angular velocity (and thereby the main action) to the smaller lens surface on its rotating spindle while using the larger grinder-surface with less angular velocity (and thereby subsidiary action) in conjunction.
  • the effect of this difference in the action of grinder and lens creates definite (and comparatively short) spiral point lines on the lens-surface. Transferring the main work to-the lens has the advantage of making quicker and more precise workmanship.
  • the various grinding and polishing tools in concentric form separate from one another.
  • an automatically consecutive grinding and polishing service is considerably facilitated.
  • the change of tools can be, for example, so efiected that the grinders which work in a. group together (concentric, mutually interacting) are mounted on spin es so arranged that various grinders come into ction automatically one after another (by means of a capstan or such like).
  • Figure I is a diagrammatic view showing the outline of a lens and by a curved line the point path of a grinding grain over the face of the lens.
  • Figure II is similar to Figure I but showing a relatively long point path with numerous intersections.
  • Figure III is a central sectional detail view, partly broken away, of a grinding device adapted to carry out my invention.
  • Figure IV is a detail central sectional view of a modified form of device showing two grinding tools and their holders.
  • Figure V is a detail central sectional view of a further modified device showing a lens, polisher and the supporting means therefor and Figures VI, VII and VIII are views similar to Figures I and II but showing point paths of different forms.
  • Fig. III the lens is fastened on the holder 2 which is supported by the hollow rotating spindle 3.
  • the spindle 3 is mounted on two ballbearings 4 and 5 which are mounted in the casting 6' and are adjusted with this to an invisible vertical axisdirection through spindle 3 to grinder-spindle I (i. e. adjusted to the central point P of the working surface) so that the two spindles 3 and I cut at every desired angle of axis in the optical centre "0 (below or above the working surface).
  • the tool-spindle I carries on its mandrel-guide 8 (with conical head 9) the tool-holder III with the annular grinding tool.
  • a coupling-clutch I2 is provided, which looks with the opposing teeth of the disc I 3,' so that the speed of the tool II is governed by the rotation of the disc I3 on spindle I.
  • the bush' I4 by means of a key governs spindle I and is driven by its pulley II. Spindle 3 is driven from the pulley I6.
  • a spherical seating with the distance of the grinding-surface from the axial point of intersection as radius, must be created with mathematical exactitude (even when the shape of the parts originally chosen varies) and must be attributed to the fact that both grinding pieces wear themselves away or work themselves down until complete surfacecontact is achieved, which is only rendered possible by the spherical seating referred to.
  • a change in. the various grinding and polishing tools for the above process can be carried out as in Fig. IV which is particularly applicable to automatic machines by a mechanical device e. g. the tool holder I 0 is lowered by spindle 1 until the flange-ring I8 rests on the transport-plate II. A sideways motion of the transport-plate I I is made and the succeeding tool II' comes into the position left by the tool taken out of action. The spindle I thus disengages from the teeth I2 of the tool I I andengages again when II is above it.
  • Fig. V is intended to show that the lower grinder II when smoothing or polishing can remain fixed to its holder III on spindle 1.
  • the tool II (next to be used) is fixed over the grinder II and the teeth I2 are engaged in the teeth of the holder I0.
  • Either of these or other following tools can be fitted (when necessary) with a guard to prevent splashing of grinding grains.
  • the two tools shown in the diagram V do not come simultaneously into contact with the lens. Either the grinder on the hatlike carrier II or the grinder II, but not both at once.
  • Disconnccting, removing, engaging and fastening of. the grinding disc I I which is responsible for the grinding accuracy, is not necessary at every stage of the process nor by altering the course of the grinding-grains, as can be seen by Fig. V so that a saving is secured in working methods and precise fixing in the position.
  • the lessening or absence of interruptions in the work to change tools of variousdegrees or groups of grinding lines when grinding, smoothing, prepolishing or finally polishing is very advantageous in the application of the above process with automatic or semi-automatic machines with fixed (not ball-jointed) spindles. If necessary, the mounting and dismounting of the polishing head II can take place quite automatically without stopping the spindles.
  • Fig. VII is to illustrate a number of grinding strokes which go throughthe middle of the surface of the lens or grinder and make short transits.
  • the grinding or smoothing tool ll consists of a small grinding ring.
  • the polishing tool consists of a complete polishing disc or a wide polishing segment.
  • Fig. VIII is to illustrate a spiral point-line, which goes through the middle of the surface of the lens and makes comparatively short transit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US571188A 1930-10-29 1931-10-26 Grinding Expired - Lifetime US2005718A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1930D0029530 DE552316C (de) 1930-10-29 1930-10-29 Schleifen und Polieren vorzugsweise sphaerischer Flaechen bei Polflaechenberuehrung mittels umlaufender, auf sich schneidenden Achsen sitzender Werkstueck- und Werkzeugtraeger
GB26982/31A GB391470A (en) 1930-10-29 1931-09-28 Grinding and polishing lenses and the like

Publications (1)

Publication Number Publication Date
US2005718A true US2005718A (en) 1935-06-25

Family

ID=10252260

Family Applications (1)

Application Number Title Priority Date Filing Date
US571188A Expired - Lifetime US2005718A (en) 1930-10-29 1931-10-26 Grinding

Country Status (5)

Country Link
US (1) US2005718A (en(2012))
BE (1) BE383540A (en(2012))
DE (1) DE552316C (en(2012))
FR (1) FR727494A (en(2012))
GB (1) GB391470A (en(2012))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419543A (en) * 1944-09-04 1947-04-29 American Optical Corp Means and methods of abrading
US2463698A (en) * 1943-05-31 1949-03-08 Micromatic Hone Corp Device for generating segmental spherical surfaces
US2475275A (en) * 1945-01-19 1949-07-05 Birchall Henry James Lens of variable focal power having surfaces of involute form
US2478698A (en) * 1945-09-26 1949-08-09 Rca Corp Light slit projection system with field flattening lens
US2643492A (en) * 1950-12-05 1953-06-30 Burroughs Optomat Inc Grinding machine and method
US2660006A (en) * 1950-02-25 1953-11-24 Gen Motors Corp Grinding machine
US2919523A (en) * 1951-09-04 1960-01-05 Bozena Marie Phillips Ophthalmic lenses and process and apparatus for producing the same
US3599377A (en) * 1968-07-22 1971-08-17 Bausch & Lomb Lens alignment using gas bearings
US3877177A (en) * 1972-07-17 1975-04-15 Canon Kk Device for machining spherical surfaces
US20100190415A1 (en) * 2009-01-13 2010-07-29 Schneider Gmbh & Co. Kg Device and a method for polishing lenses
CN115256123A (zh) * 2022-09-27 2022-11-01 中安洪信(江苏)健康科技有限公司 一种显微镜镜片的抛光装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084164B (de) * 1951-11-17 1960-06-23 Pierre Angenieux Vorrichtung zum Polieren sphaerischer Flaechen
NL248520A (en(2012)) * 1959-02-18
DE3125915A1 (de) * 1981-07-01 1983-01-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum herstellen einer vorratskathode und vorrichtung zur durchfuehrung des verfahrens
ES2184710T3 (es) 1999-04-01 2003-04-16 Gen Instrument Corp Generador de distorsion no lineal.
US20040052536A1 (en) 2002-09-17 2004-03-18 General Instrument Corporation Second order predistortion circuit
CN114178934A (zh) * 2021-12-07 2022-03-15 扬州市宝余光电有限公司 基于镜片厚度加工的铣磨装置及其使用方法

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463698A (en) * 1943-05-31 1949-03-08 Micromatic Hone Corp Device for generating segmental spherical surfaces
US2419543A (en) * 1944-09-04 1947-04-29 American Optical Corp Means and methods of abrading
US2475275A (en) * 1945-01-19 1949-07-05 Birchall Henry James Lens of variable focal power having surfaces of involute form
US2478698A (en) * 1945-09-26 1949-08-09 Rca Corp Light slit projection system with field flattening lens
US2660006A (en) * 1950-02-25 1953-11-24 Gen Motors Corp Grinding machine
US2643492A (en) * 1950-12-05 1953-06-30 Burroughs Optomat Inc Grinding machine and method
US2919523A (en) * 1951-09-04 1960-01-05 Bozena Marie Phillips Ophthalmic lenses and process and apparatus for producing the same
US3599377A (en) * 1968-07-22 1971-08-17 Bausch & Lomb Lens alignment using gas bearings
US3877177A (en) * 1972-07-17 1975-04-15 Canon Kk Device for machining spherical surfaces
US20100190415A1 (en) * 2009-01-13 2010-07-29 Schneider Gmbh & Co. Kg Device and a method for polishing lenses
US8727834B2 (en) * 2009-01-13 2014-05-20 Schneider Gmbh & Co. Kg Device and a method for polishing lenses
CN115256123A (zh) * 2022-09-27 2022-11-01 中安洪信(江苏)健康科技有限公司 一种显微镜镜片的抛光装置

Also Published As

Publication number Publication date
GB391470A (en) 1933-04-28
DE552316C (de) 1932-06-13
BE383540A (en(2012)) 1931-11-30
FR727494A (fr) 1932-06-18

Similar Documents

Publication Publication Date Title
US2005718A (en) Grinding
US5149337A (en) Lens grinder and method of grinding lens
US1401831A (en) Method of and apparatus for grinding glass
US3117396A (en) Lens grinding apparatus and method
JP3620679B2 (ja) 遊離砥粒によるウエーハの面取装置及び面取方法
US4908996A (en) Method for machine polishing ophthalmic lenses to a translucent finish
CN101121250A (zh) 杯状砂轮修整器
US5551908A (en) Centerless grinder and wheel truing device therefor
US3816997A (en) Apparatus for simultaneously performing rough and fine grinding operations
US2187471A (en) Grinding
US2278314A (en) Apparatus for producing one-piece multifocal ophthalmic lenses
US2587926A (en) Process and apparatus for making lenses
CN1174110A (zh) 球面零件轨迹成型加工方法及装置
US6250992B1 (en) Mirror grinding method and glass lens
CN113580011A (zh) 一种双端面磨床修整装置
US946571A (en) Process for grinding bifocal lenses and other spherical surfaces.
US2329713A (en) Lens edging device
US2383131A (en) Apparatus for polishing optical flats
Van Ligten et al. Diamond grinding of aspheric surfaces on a CNC 4-axis machining centre
JPS62501277A (ja) 目直し工具を備えた研削機の心押し台
US2105175A (en) Method and means for abrading lenses
US2277696A (en) Abrading tool
US1347653A (en) Mechanism for making bifocal lenses
US2355345A (en) Optical device and method of making same
CN222661344U (zh) 砂轮以及铣磨机