US3672100A - Speed control device - Google Patents
Speed control device Download PDFInfo
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 32
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 27
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 239000012190 activator Substances 0.000 description 5
- 230000000644 propagated effect Effects 0.000 description 2
- 241001446467 Mama Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
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
- 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)
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)
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)
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 |
-
1970
- 1970-02-25 GB GB1256815D patent/GB1256815A/en not_active Expired
- 1970-02-27 DE DE19702009363 patent/DE2009363A1/de active Pending
- 1970-02-27 US US14907A patent/US3672100A/en not_active Expired - Lifetime
- 1970-03-03 FR FR7007573A patent/FR2037549A5/fr not_active Expired
Patent Citations (4)
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)
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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