US3672100A - Speed control device - Google Patents

Speed control device Download PDF

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Publication number
US3672100A
US3672100A US14907A US3672100DA US3672100A US 3672100 A US3672100 A US 3672100A US 14907 A US14907 A US 14907A US 3672100D A US3672100D A US 3672100DA US 3672100 A US3672100 A US 3672100A
Authority
US
United States
Prior art keywords
speed
output
advancing mechanism
grinding machine
grinding wheel
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
US14907A
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English (en)
Inventor
Manlio Pesante
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.)
SKF Industrie SpA
Original Assignee
RIV Officine di Villar Perosa SpA
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 RIV Officine di Villar Perosa SpA filed Critical RIV Officine di Villar Perosa SpA
Application granted granted Critical
Publication of US3672100A publication Critical patent/US3672100A/en
Anticipated expiration legal-status Critical
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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load

Definitions

  • 6s.17 means 11mmd [51] lnt.Cl ..B24b49/08 support fluid 0f the hydrostatic spindle when Srindinfl 5s Fleld 61 Search ..51/l65.74, 165.75, 165.76, wheel contacts the workpiece supported on the spindle Speed 5 5 77 1553
  • 55 9 1 532 1 3 changing means are provided, responsive to the output of the detector means, for effecting a change in the speed of the ad- [56] References Cited vancing mechanism of the grinding wheel.
  • the changeover from the speed of approach to the working speed preferably occurs at the moment at which the wheeljust touches the workpiece in order to reduce to a minimum the period during which the wheel is inoperative.
  • a hydrostatic spindle generally indicated at 2 is shown supporting a workpiece 3.
  • the spindle 2 has its axis parallel to that of the wheel 1 and is so positioned in relation to the wheel 1 that the advancing movement of the wheel 1 is along a line joining the axes of the wheel I and the spindle 2.
  • the differential manometer 9 transduces any differences of pressure in the fluid in the tubes 7 and 8 into an electrical output signal, the amplitude of which is proportional to the difference in pressure of the fluid in the tubes 7 and 8.
  • Electronic devices for transducing pressure differences into electric signals are many; for example, among the most commonly used are electrical transducers called strain gauges" and pick-ups, with inductive and capacitative proximity, with a differential transformer.
  • the electrical output signal of the differential manometer 9 passes to an amplifier l0, and thence to an electronic trigger II with an adjustable threshold.
  • the trigger ll triggers a power amplifier 12 which feeds an activator 13 which drives the parts of the advancing mechanism 14 to control the speed of advance of the wheel I.
  • the device works in the following manner:
  • the differential manometer 9 has a sensitivity of the order of l/5,000 of an atmosphere.
  • the output of the difierential manometer 9 is, as has already been said, an electrical signal of amplitude proportional to the value of the differential pressure, which is amplified by the amplifier 10.
  • the amplified signal acts on the trigger" ll which has an adjustable threshold. This makes it possible to determine the level of pressure above which the speed changeover must occur.
  • first amplifier means for amplifying the output of said differential manometer

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
US14907A 1969-03-04 1970-02-27 Speed control device Expired - Lifetime US3672100A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5083869 1969-03-04

Publications (1)

Publication Number Publication Date
US3672100A true US3672100A (en) 1972-06-27

Family

ID=11273962

Family Applications (1)

Application Number Title Priority Date Filing Date
US14907A Expired - Lifetime US3672100A (en) 1969-03-04 1970-02-27 Speed control device

Country Status (4)

Country Link
US (1) US3672100A (enrdf_load_stackoverflow)
DE (1) DE2009363A1 (enrdf_load_stackoverflow)
FR (1) FR2037549A5 (enrdf_load_stackoverflow)
GB (1) GB1256815A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863400A (en) * 1972-06-06 1975-02-04 Finike Italiana Marposs Device for controlling the approach speed in machine tools particularly grinding machines
US3897660A (en) * 1973-09-17 1975-08-05 Kenji Chijiiwa Apparatus for automatically removing fins of castings
US3994098A (en) * 1974-06-06 1976-11-30 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Apparatus for regulating the lapping pressure during lapping of two bevel gears in a lapping machine
US4186527A (en) * 1978-08-07 1980-02-05 Hausermann Abrading Process Company Apparatus for shaping electrodes
US4535570A (en) * 1982-05-04 1985-08-20 Tokyo Shibaura Denki Kabushiki Kaisha Machine for beveling
US4648210A (en) * 1984-06-30 1987-03-10 Saint-Gobain Vitrage Apparatus for controlling position of grinding tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639562A (en) * 1950-02-09 1953-05-26 Landis Tool Co Precision locating device
US2802312A (en) * 1953-11-13 1957-08-13 Cincinnati Milling Machine Co Grinding machine
US2961808A (en) * 1958-03-10 1960-11-29 Machinery Electrification Inc Machine tool with load control
US2984952A (en) * 1958-04-29 1961-05-23 Landis Tool Co Pressure operated feed control for grinding machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639562A (en) * 1950-02-09 1953-05-26 Landis Tool Co Precision locating device
US2802312A (en) * 1953-11-13 1957-08-13 Cincinnati Milling Machine Co Grinding machine
US2961808A (en) * 1958-03-10 1960-11-29 Machinery Electrification Inc Machine tool with load control
US2984952A (en) * 1958-04-29 1961-05-23 Landis Tool Co Pressure operated feed control for grinding machines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863400A (en) * 1972-06-06 1975-02-04 Finike Italiana Marposs Device for controlling the approach speed in machine tools particularly grinding machines
US3897660A (en) * 1973-09-17 1975-08-05 Kenji Chijiiwa Apparatus for automatically removing fins of castings
US3994098A (en) * 1974-06-06 1976-11-30 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Apparatus for regulating the lapping pressure during lapping of two bevel gears in a lapping machine
US4186527A (en) * 1978-08-07 1980-02-05 Hausermann Abrading Process Company Apparatus for shaping electrodes
US4535570A (en) * 1982-05-04 1985-08-20 Tokyo Shibaura Denki Kabushiki Kaisha Machine for beveling
US4648210A (en) * 1984-06-30 1987-03-10 Saint-Gobain Vitrage Apparatus for controlling position of grinding tool

Also Published As

Publication number Publication date
DE2009363A1 (de) 1971-01-21
FR2037549A5 (enrdf_load_stackoverflow) 1970-12-31
GB1256815A (enrdf_load_stackoverflow) 1971-12-15

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