US3356302A - Grinding operations - Google Patents

Grinding operations Download PDF

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Publication number
US3356302A
US3356302A US441743A US44174365A US3356302A US 3356302 A US3356302 A US 3356302A US 441743 A US441743 A US 441743A US 44174365 A US44174365 A US 44174365A US 3356302 A US3356302 A US 3356302A
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US
United States
Prior art keywords
media
grinding
chamber
pieces
cylindrical
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
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US441743A
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English (en)
Inventor
Podmore Henry Leveson
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.)
William Boulton Ltd
Podmore and Sons Ltd
Original Assignee
William Boulton Ltd
Podmore and Sons Ltd
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 William Boulton Ltd, Podmore and Sons Ltd filed Critical William Boulton Ltd
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Publication of US3356302A publication Critical patent/US3356302A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/14—Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting
    • 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
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • 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
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • B24B31/073—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers involving a bowl being ring- or spiral-shaped

Definitions

  • This invention relates to grinding operations in which the material to be processed, which may be either in the form of a suspension in liquid or as dry powder is fed into a chamber containing media of specific shape and subjected to controlled compound vibration.
  • the media In vibration grinding mills at present in use the media is usually spherical giving a comparatively large volume of voids between the spheres and providing only point contact to effect the grinding operation. It is found in practice that the volume of voids between spherical media approximates to 40% of the total volume of media and charge. As a result of many experiments I have found the grinding efiiciency and the rate of grinding to be greatly enhanced if the volume of voids between the media is substantially reduced.
  • the present invention consists in the use of a grinding chamber containing cylindrical pieces of grinding media which are made to orient themselves into a generally parallel relationship so that a rolling or rubbing action in line or face contact is created between the adjacent cylindrical surfaces of the pieces of media under the vibrational movement of the grinding chamber.
  • This predetermined orientation of the cylindrical pieces of media can best be achieved by subjecting the grinding chamber and its contents to compound rotational vibrations about an approximately vertical axis.
  • the two or more vibratory systems must be capable of phase adjustment and control so as to produce and maintain near optimum packing density for the media and charge of process material.
  • phased compound vibratory system The purpose of the phased compound vibratory system is to provide conditions which will facilitate free rotation of the pieces of media which are not aligned but which will not disturb the alignment of those pieces which are packed to give maximum packing density. Under such conditions and after a sufficient interval of time, all the media will be aligned to give the optimum packing density and will then provide line and face contact but no point contact.
  • FIGURE 1 is a side elevation of a grinding mill.
  • FIGURE 2. is a plan.
  • FIGURE 3 is a vertical section.
  • FIGURE 4 is a perspective view showing the grouping of the grinding media desired, drawn to a larger scale.
  • the grinding chamber 10 should be of cylindrical shape with its axis approximately vertical.
  • the grinding chamber may include an outer cylindrical wall 10* and an inner cylindrical wall 10 both concentric about a vertical axis, so that as viewed in plan the chamber is of annular shape.
  • Parallel alignment of the grinding media is facilitate by having the base 11 of the grinding chamber in the shape of a semi toroid.
  • FIGURE 4 it will be appreciated that once the cylindrical media M, FIGURE 4 is packed to give maximum density as shown then the degree of pressure reduction required to facilitate rotation of the cylindrical pieces of media is considerably greater than is necessary to produce parallel alignment and hence it the amplitude is correctly adjusted aligned media will remain so aligned.
  • the annular grinding chamber in conjunction with the type of vibratory action referred to, is calculated to promote a circulation of the media around the grinding chamber, but without upsetting the prescribed orientation of the media as a whole.
  • grinding chamber 10 is mounted on an annular series of springs 12 carried by a base 13 and is subjected to the necessary compound vibrations by means of out-of-balance masses 14 carried by a vertical spindle 15 mounted on the vertical axis of the grinding chamber and subjected to rotation by an electric motor 16 giving the high frequency compound vibration having the desired rotational and upward and downward component; the angle of lead between the two weights 14 being capable of adjustment so as to correctly phase the two vibratory systems.
  • grinding is used herein broadly to include polishing or de-burring operations.
  • Method of grinding and similar operations comprising the steps of placing cylindrical pieces of grinding media into a grinding chamber, feeding the material to be treated in the chamber, subjecting the grinding chamher to controled compound vibrational movements, thereby causing the grinding media to orient into a generally parallel relationship, and thus creating rolling and rubbing action in contact between adjacent surfaces of the pieces of media.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Crushing And Grinding (AREA)
US441743A 1964-04-06 1965-03-22 Grinding operations Expired - Lifetime US3356302A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14135/64A GB1026718A (en) 1964-04-06 1964-04-06 Improvements relating to grinding operations

Publications (1)

Publication Number Publication Date
US3356302A true US3356302A (en) 1967-12-05

Family

ID=10035635

Family Applications (1)

Application Number Title Priority Date Filing Date
US441743A Expired - Lifetime US3356302A (en) 1964-04-06 1965-03-22 Grinding operations

Country Status (7)

Country Link
US (1) US3356302A (de)
BE (1) BE661915A (de)
DE (1) DE1285851B (de)
ES (1) ES311418A1 (de)
FR (1) FR1427591A (de)
GB (1) GB1026718A (de)
NL (1) NL6504338A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387539A (en) * 1981-03-30 1983-06-14 The Hutson Corporation Vibratory actuator
JPS6316052A (ja) * 1986-07-07 1988-01-23 川崎重工業株式会社 振動ミル
US20110233314A1 (en) * 2008-10-09 2011-09-29 Imerys Grinding method
CN111546226A (zh) * 2020-04-30 2020-08-18 中国航发哈尔滨东安发动机有限公司 机匣型腔/油路振动抛磨装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414795B2 (de) * 1972-04-17 1979-06-09
DE3446906C2 (de) * 1984-12-21 1989-11-23 Rösler Gleitschlifftechnik, Maschinenbau und technische Keramik GmbH, 8623 Staffelstein Schallschluckdeckel für Gleitschliffmaschinen
EP0441995A1 (de) * 1990-02-12 1991-08-21 Technoimportexport Vibrations-Brech- und -Mahlvorrichtung
EP0942783B1 (de) * 1996-10-23 2002-03-27 Rocklabs Limited Verfahren und vorrichtung zum zerkleinern und pulverisieren
US6247659B1 (en) 1999-04-20 2001-06-19 Rocklabs Limited Milling and pulverising apparatus and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983454A (en) * 1959-01-07 1961-05-09 Jr William Podmore Method of vibratory grinding and apparatus therefor
US3008656A (en) * 1958-10-07 1961-11-14 Fred H Jowsey Grinding
US3215254A (en) * 1964-01-15 1965-11-02 Eldon W Otto Ladder and elevator
US3295768A (en) * 1964-02-07 1967-01-03 Us Stoneware Inc Method of vibratory-milling

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE735244C (de) * 1938-12-07 1943-05-10 Ig Farbenindustrie Ag Rohrschwingmuehle
DE716457C (de) * 1940-07-12 1942-01-21 Krupp Fried Grusonwerk Ag Muldenschwingmuehle
FR940226A (fr) * 1945-01-16 1948-12-07 Stavsborgs Aktiebolag Moulin broyeur à vibration
DE1103730B (de) * 1959-01-02 1961-03-30 Podmores Engineers Ltd Schwingmuehle
US3100088A (en) * 1960-11-19 1963-08-06 Podmore And Sons Ltd W Vibration mills

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3008656A (en) * 1958-10-07 1961-11-14 Fred H Jowsey Grinding
US2983454A (en) * 1959-01-07 1961-05-09 Jr William Podmore Method of vibratory grinding and apparatus therefor
US3215254A (en) * 1964-01-15 1965-11-02 Eldon W Otto Ladder and elevator
US3295768A (en) * 1964-02-07 1967-01-03 Us Stoneware Inc Method of vibratory-milling

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387539A (en) * 1981-03-30 1983-06-14 The Hutson Corporation Vibratory actuator
JPS6316052A (ja) * 1986-07-07 1988-01-23 川崎重工業株式会社 振動ミル
US20110233314A1 (en) * 2008-10-09 2011-09-29 Imerys Grinding method
US8783589B2 (en) 2008-10-09 2014-07-22 Imerys Grinding method
CN111546226A (zh) * 2020-04-30 2020-08-18 中国航发哈尔滨东安发动机有限公司 机匣型腔/油路振动抛磨装置
CN111546226B (zh) * 2020-04-30 2022-04-01 中国航发哈尔滨东安发动机有限公司 机匣型腔/油路振动抛磨装置

Also Published As

Publication number Publication date
DE1285851B (de) 1968-12-19
NL6504338A (de) 1965-10-07
FR1427591A (fr) 1966-02-04
BE661915A (de) 1965-08-02
ES311418A1 (es) 1965-07-16
GB1026718A (en) 1966-04-20

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