GB934887A - Device for stepwise speed control of low-speed change-speed gears - Google Patents
Device for stepwise speed control of low-speed change-speed gearsInfo
- Publication number
- GB934887A GB934887A GB4143260A GB4143260A GB934887A GB 934887 A GB934887 A GB 934887A GB 4143260 A GB4143260 A GB 4143260A GB 4143260 A GB4143260 A GB 4143260A GB 934887 A GB934887 A GB 934887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- shift
- contacts
- switches
- switch
- 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
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/0405—Programme-control specially adapted for machine tool control and not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/12—Mechanical drives with means for varying the speed ratio
- B23Q5/14—Mechanical drives with means for varying the speed ratio step-by-step
- B23Q5/147—Mechanical drives with means for varying the speed ratio step-by-step electrically-operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2705/00—Driving working spindles or feeding members carrying tools or work
- B23Q2705/02—Driving working spindles
- B23Q2705/06—Mechanical drives with means for varying the speed ratio
- B23Q2705/062—Mechanical drives with means for varying the speed ratio for lathes
- B23Q2705/068—Mechanical drives with means for varying the speed ratio for lathes electrically controlled
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Gear-Shifting Mechanisms (AREA)
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
- Keying Circuit Devices (AREA)
Abstract
934,887. Change speed control. ZAVODY PRESNEHO STROJIRENSTRI GOTTWALDOV NARODNI PODNIK. Dec. 1, 1960 [Dec. 18, 1959], No. 41432/60. Class 80 (2). A change speed control for low speed gears used for driving the feed mechanism in machine tools comprises a shift rod 4 fast with the armature 5 of twin electromagnets 1, 1<SP>1</SP> which are selectively connected by a change-over switch 7 either to parallel preselector switches 12, 12<SP>1</SP> or to parallel programme control switches 8, 8<SP>1</SP>. For a preselected shift the change-over switch 7 is positioned so that contacts 11, 11<SP>1</SP>, 17 are closed and one (e.g. 12) of the two preselector switches 12, 12<SP>1</SP> is closed to preselect a ratio which is established by closing a pushbutton operated switch 18 to energize a relay 13 which closes a switch 13a to complete the circuit from the electromagnet 1 through contacts 3, 11, 12, 13a and a relay 9. The resistance of the relay 9 is such that the current in the circuit is too weak to effect the shift, but energization of the relay closes switches 9a, 9b to respectively energize a relay 10 and to maintain the relay 13 energized after the pushbutton switch 18 is opened. The relay 10 closes switches 10a, 10b, the latter bridging the relay 9 and providing an increase of current to the electromagnet 1 which moves the armature 5 and rod 4 left to establish the selected ratio. The leftward movement of the rod 4 opens the switch 3 and closes 3<SP>1</SP>, the former breaking the previously energized circuit and all the relays return to their initial positions. Condensers 14, 16 in parallel with the relays 10, 13 and a resistor 15 in series with the relay 10, delay the de-energization of the relays 10, 13. If the gear teeth are not positioned for precise engagement and prevent establishment of the preselected ratio during the period of increased current, the delayed de-energization of the relay 13 keeps the contact 13a closed after the relay 10 is de-energized and the contacts 10a, 10b open, whereupon a weak current in the circuit re-energizes the relay 9 and the cycle is repeated until the shift is established. For a programme shift the change-over switch 7 is positioned to close contacts 6, 6<SP>1</SP> and open contacts 11, 11<SP>1</SP>, 17. Closure of one of the switches 8, 8<SP>1</SP> (e.g. 8) completes the circuit from the electromagnet 1 through the contacts 3, 6, 8 and relay 9, the latter of which is energized to close the contact 9a and energize relay 10 which in turn closes the contact 10b to bridge the relay 9 and provide an increased current to the electromagnet 1 which establishes the shift. If the shift is not completed during the period of increased current the cycle is repeated until the shift is established.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS736659 | 1959-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB934887A true GB934887A (en) | 1963-08-21 |
Family
ID=5422666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4143260A Expired GB934887A (en) | 1959-12-18 | 1960-12-01 | Device for stepwise speed control of low-speed change-speed gears |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH387406A (en) |
| GB (1) | GB934887A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161047A (en) * | 2020-07-14 | 2021-01-01 | 引力波数控设备有限公司 | Servo automatic gear shifting speed change system of AMT (automated mechanical Transmission) numerical control lathe |
-
1960
- 1960-11-04 CH CH1235460A patent/CH387406A/en unknown
- 1960-12-01 GB GB4143260A patent/GB934887A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161047A (en) * | 2020-07-14 | 2021-01-01 | 引力波数控设备有限公司 | Servo automatic gear shifting speed change system of AMT (automated mechanical Transmission) numerical control lathe |
Also Published As
| Publication number | Publication date |
|---|---|
| CH387406A (en) | 1965-01-31 |
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