CA1178695A - Press speed control and indication system - Google Patents
Press speed control and indication systemInfo
- Publication number
- CA1178695A CA1178695A CA000410227A CA410227A CA1178695A CA 1178695 A CA1178695 A CA 1178695A CA 000410227 A CA000410227 A CA 000410227A CA 410227 A CA410227 A CA 410227A CA 1178695 A CA1178695 A CA 1178695A
- Authority
- CA
- Canada
- Prior art keywords
- speed
- flywheel
- clutch
- press
- meter
- 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
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 241000592503 Speea Species 0.000 description 2
- 241000950638 Symphysodon discus Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- HOQADATXFBOEGG-UHFFFAOYSA-N isofenphos Chemical compound CCOP(=S)(NC(C)C)OC1=CC=CC=C1C(=O)OC(C)C HOQADATXFBOEGG-UHFFFAOYSA-N 0.000 description 1
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/14—Control arrangements for mechanically-driven presses
- B30B15/148—Electrical control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Control Of Velocity Or Acceleration (AREA)
Abstract
ABSTRACT
The present invention relates to a speed control and indication system for a mechanical press (2).
In order to enable the press to operate at its full running speed on the first cycle thereof after actuation of the clutch (9), the flywheel (6) is driven at a speed higher than the set running speed so that as the mechanical inertia of the drive mechanism will cause the press to slow down to its set running speed.
The control circuit modifies the speed control voltage after actuation of the clutch so that the press continues to run at the set speed even after the mechanical inertia is overcome. The signal from the tachometer (24) to the speed meter (28) is modified before actuation of the clutch so that it provides a reading at the set running speed of the press even though the flywheel is running at a nigher speed. After the clutch is actuated, the true tachometer voltage is fed to the speed meter so that it continues to indicate the true running speed of the press.
The present invention relates to a speed control and indication system for a mechanical press (2).
In order to enable the press to operate at its full running speed on the first cycle thereof after actuation of the clutch (9), the flywheel (6) is driven at a speed higher than the set running speed so that as the mechanical inertia of the drive mechanism will cause the press to slow down to its set running speed.
The control circuit modifies the speed control voltage after actuation of the clutch so that the press continues to run at the set speed even after the mechanical inertia is overcome. The signal from the tachometer (24) to the speed meter (28) is modified before actuation of the clutch so that it provides a reading at the set running speed of the press even though the flywheel is running at a nigher speed. After the clutch is actuated, the true tachometer voltage is fed to the speed meter so that it continues to indicate the true running speed of the press.
Description
~ 6~ S
P~ESS SPEED CONTROL ~D INDICA~ION S~STEM
The present invention relates to a mechanical press, and in particular to a speed control and in-dication system or such a pxess.
Mechanical presses are well-k.nown and, in general, comprise a frame having a slide reciprocably guided therein wi~h at least one crankshaft rotatable in the crown portion or the frar~e and connected to the slide by a connection so that wh~n the crankshaft lD rotates, the slide is caused to reciprocate~ In or~er to provide suficient mechanical rotational inertia to the driva mechanism for the sliae, the press generally includes a massive flywheel wh~ch is driven by an electric motor ~hrough a clu~ch rnechanism. I~ is common to provide a variable speed ~oupling, such as an eddy current couplin~, between the mo~or and flywheel so that the running speed of the flywheel can be varied. The 1ywheel rotates continuously when the r,~tor is energizea, but the rotary motion is not coupled to the crankshaft as long as the clutch is aeenergized. When the clutch is energized, however, the rotary motion of the 1ywheel is cou~led to the cxankshaft, which generally runs at the same speed as the flywheel, although a gearing arrangement could be used to ~rovide a drive ratio which is greater or less than 1:1.
Presses which utilize a masslve flywheel or the storage o kinetic energy have a characteristic speed slowdown during engagement of the clutch hecause - 30 of the energy required to start the rotary and reciproca-ting parts in motion. ~s will be appreciated, the drive mechanism for a mechanical press is quite massiYe and there is a considerable amount of inertia which must be overcome. This results in a press speed which is lower than its set r~ning speed~ and it ofken requires several strokes before the r~mning speed .
~786~
can be attained~ Accordingly, the speed-time xelation-ship of the press is at i~s normal running level with tne clutch deenergize~ and the flywheel up to speed, then drops momentarily for several cycles o~ the press as the mechanical inextia of the ~rive mechanism is overcome, and then attains its no~mal running speed.
In some tooling applicatlons, it is important that the press attain running speed on the firs~ stroke after engagement o~ the clutch thereby making it neces-sary to prevent the drop in press speed discus,sedabove. Since ~he amount o s~eed drop is proportional to the rotational ener~y of the press parts which must be accelerated to running speed from a st~tic condition, and since this energy is taken ~rom the flywheel, the slowaown effect could be eliminated by increasin~ the flywneel speed by a proportional amount. After the inertia is overcome, the press speed must be maintained at its normal running level.
The press speed control and indication system of the pxesen~ invention enables the press to be started and operated on its first stroke at its predetermined running speed by providing a control voltage to the sp~ed yreater than its normal running speed when the clutch is deenergized. ~nen the alutch is eneryized, the press will immediately drop to its normal running speed so that the proper speed will be realized on the first stroke of tne slide. In order to enable the opera~or ~o set the press speed at the normal level, the control voltage to the speed meter is modified so that it indicates a speed lower than tha actual speed of the flywheel during the time that the clutch is deenergized.
When the clutch is energized and the inertia of the press drive mechanism is being overcome, the ~ctual flywheel speed will drop to its norma~ running , ~86~S
speed, and at this time, the speed control voltage is modified so that the flywheel speed stays at th~
normal running speed, rather than increasing to th~
overspeed condition as it otherwise would once the drive mechanism is accelerated. In oraer that the meter not read a speed which i5 now too low, the control voltag~ from the ~lywheel tachometer is no longer modified so that the meter reads the actual 1ywheel speed, which is now rotating at its pre~etermlned running speed.
Specifically, the present invention concerns a mechanical press having a slide, a mechani~al drive train for reciprocatin~ the slide~ a motor and drive connection drivinglv connec~ed to a flywheel for continu-ously rotating the flywheel when the motor and driveconnaction is energized, and a drive means including a clutch or coupling the rotation o~ the ~lywheel to the mechanical drive train when the clutch is energiz-ed. A speed control provicles a variable speed control voltage to the motor and drive connection to control the speed oI the flywheel, and a tachometer generator is mechanically coupled to the ~l~wheel and p~ovi~es to a speed meter a meter energizing voltage indlcative of the speed o the ~lywheel. The invention is characte-rized by a first means activated only when the clutchis not energized or modi~ying the mater enex~izing voltage so that the meter reads a given normal running speed of the press even though the press is running at a speed higher than the normal r~nning speea, and a second means activated only when the clutch is energiz-ed ~or modifying the speed control voltage so that the ~lywheel is driven at the normal r~lning speed.
The sacond means enables the speed control voltage to cause the flywheel to be driven at higher than 35 its normal running speed as long as the clutch is not energized.
78~5 ~ he method according to the present lnvention concerns the pres~ aescribed above and incluaes the steps o causing the flywheel to run at a speed hlgher than its normal running spee~ when the clutch is deenerg-izea and then run at its normal running speed whenthe clutch is energized; causing the meter to indicate the flywheel speed as heing the normal running speed when the clutch is deener(3ized even though the flywheel is run~ing at a higher speed; and causing the meter to indicate ~he ~rue 1ywheel speed when the clutch is ener~iæ~d.
Figure l is a diagral~matic view o a press incorpor-ating the speed control and indication circuit of the present invention; and lS Figure ~ is a schematic diagram o the press speed control and indication circuit of the present invention.
The speed control and indication system shown in Figure 2 is intended to be incorporated with a mechanical press 2 tFigure 1) which may be of the conventional variety, and incluaes a reciprocating slide 3 mechanically driven by a suitable drive asse~bly 4, such as a crank~haft and conneation assem~ly~
The crankshaft 5 is connecked to a massive fly~7heel 6, which in turn is belt driven by an electxic motor 7 through a variable speed drive mechanism 8. For example~ the speed at which motor output sha~t is driven may be controlled by an eddy current coupling 7. As is conventional, the flywheel 6 is rotated continuously by khe motor 7 at a speed selected by the press operator, and the cranksha~t 5 is rotated only when the clutch 9 is energized thereb~ mechanically ~oupling the rotational energy of the flywheel 6 to the crankshaft 5, which in turn reciprocates .the slide through the connections.
: , . . . .
' . '- ~ . :
., ~ .
:- ~ .............
' ' ' 8~gS
Tu~ning now to Figure 2 r the motor, clutch and flywheel assembly 10 is controlled by a conventional speed control 12, wherein the flywheel 6 rot~tes continu-ously at the preset speed. The control voltage or speed control 12 is generatea by potentiometer 14 and connected to input 16 by line 18; terminal 17 and line l9 carry the bias voltage, With the motor 7 ana flywheel 6 running and the clutch 9 deener~ized, relay contacts 20 are closed by flywheel coil ll thereby shorting out poten,tiometer 22 and applying to input 16 the appropriate voltage to cause speed control 1~ ~o operate the motor 7 and flywheel 6 at an overspeed condition, In this particular en~odiment of the invention, a hi~her than normal voltage will be applied to input 16 over line 13 with potentiometer 22 shortea out.
Tachometer generator 24 produce~ an output voltage on line ~6 which is proportional to the actual speed of flywheel 6 which, when the flywheel 6 is running but the clutch 9 i~ not yet en~rgized, will be higher than the nonmal operating speed of the press 2~ When the press operator is operatiny the press 2, this would normally necessitate that he set the press speed hi~her than the eventual running ~peed so that when the press slows down as the clutch 9 is ener,~ized, the first stroke o the press wil} be at the proper r~nning spe~. This involves either estimatin~ the amount of overspeed necessary to cause th~ press to operate at its normal running speed on ~he first st.roke or re~uires the operator to refer to a table for the proper conversion. According to the present invention, however, press speea meter 28 is causea to read the desired running speed o~ the press at all til~es, whether clutch 9 is energized or not. This is accomplishea by pvtentiometer 30 conneated in parallel with normally , ;' ~86~5 open con~acts 32 between the output ~6 of tachometer generator 24 and ~he input 34 of speed meter 28.
Contacts 32 are open when c~utch 9 is deen~rgized and functlon to decrease the voltage at input 34 so that meter 2~ will xea~ low. Thus, even though ~lyw~eel - 6 may be rotating at its ovexspeed level, poten~iometer 30 causes meter 28 to indicate to the operator that the press is set properly for an eventual press running speed at the desired level.
10Potentiometer 22 is adiustable for the amount of inertial slow down associated with the press 2, and potentio~eter 14 is set for the proper overspeed level necessary to compensate ~or this inertial slowdown.
In operation, before Glutch 9 is energiæed, potentiometer 22 is shorted out and the high voltage on line 18 causes flywheel 6 to be rotated in an overs~eed conditi-on. Since contacts 32 are open, potentiometer 30 causes meter 28 to indicate the preset speed that the potentiometer 14 is set ~or. ~hen clutch 9 is engaged, however, relay contacts 20 are opened and relay contacts 32 are closed. This results in placing potentiometer 22 in series with line 1$ so that a lower voltage is applied at input 16 thereby causin~
~peed control 12 to run rlywheel 6 at a lower speed~
which speed is the normal running speed of the press tha~ is desired ~or that particular operation. Since contacts 32 are now closed~ potentiometer 30 is shorted out and meter 28 is controlled by the actual voltage developed on the output 26 of tachometer generator 24, w~ich voltage corresponds ~o the actual running speed of 1ywheel 6. By timing the opening o contac~s
P~ESS SPEED CONTROL ~D INDICA~ION S~STEM
The present invention relates to a mechanical press, and in particular to a speed control and in-dication system or such a pxess.
Mechanical presses are well-k.nown and, in general, comprise a frame having a slide reciprocably guided therein wi~h at least one crankshaft rotatable in the crown portion or the frar~e and connected to the slide by a connection so that wh~n the crankshaft lD rotates, the slide is caused to reciprocate~ In or~er to provide suficient mechanical rotational inertia to the driva mechanism for the sliae, the press generally includes a massive flywheel wh~ch is driven by an electric motor ~hrough a clu~ch rnechanism. I~ is common to provide a variable speed ~oupling, such as an eddy current couplin~, between the mo~or and flywheel so that the running speed of the flywheel can be varied. The 1ywheel rotates continuously when the r,~tor is energizea, but the rotary motion is not coupled to the crankshaft as long as the clutch is aeenergized. When the clutch is energized, however, the rotary motion of the 1ywheel is cou~led to the cxankshaft, which generally runs at the same speed as the flywheel, although a gearing arrangement could be used to ~rovide a drive ratio which is greater or less than 1:1.
Presses which utilize a masslve flywheel or the storage o kinetic energy have a characteristic speed slowdown during engagement of the clutch hecause - 30 of the energy required to start the rotary and reciproca-ting parts in motion. ~s will be appreciated, the drive mechanism for a mechanical press is quite massiYe and there is a considerable amount of inertia which must be overcome. This results in a press speed which is lower than its set r~ning speed~ and it ofken requires several strokes before the r~mning speed .
~786~
can be attained~ Accordingly, the speed-time xelation-ship of the press is at i~s normal running level with tne clutch deenergize~ and the flywheel up to speed, then drops momentarily for several cycles o~ the press as the mechanical inextia of the ~rive mechanism is overcome, and then attains its no~mal running speed.
In some tooling applicatlons, it is important that the press attain running speed on the firs~ stroke after engagement o~ the clutch thereby making it neces-sary to prevent the drop in press speed discus,sedabove. Since ~he amount o s~eed drop is proportional to the rotational ener~y of the press parts which must be accelerated to running speed from a st~tic condition, and since this energy is taken ~rom the flywheel, the slowaown effect could be eliminated by increasin~ the flywneel speed by a proportional amount. After the inertia is overcome, the press speed must be maintained at its normal running level.
The press speed control and indication system of the pxesen~ invention enables the press to be started and operated on its first stroke at its predetermined running speed by providing a control voltage to the sp~ed yreater than its normal running speed when the clutch is deenergized. ~nen the alutch is eneryized, the press will immediately drop to its normal running speed so that the proper speed will be realized on the first stroke of tne slide. In order to enable the opera~or ~o set the press speed at the normal level, the control voltage to the speed meter is modified so that it indicates a speed lower than tha actual speed of the flywheel during the time that the clutch is deenergized.
When the clutch is energized and the inertia of the press drive mechanism is being overcome, the ~ctual flywheel speed will drop to its norma~ running , ~86~S
speed, and at this time, the speed control voltage is modified so that the flywheel speed stays at th~
normal running speed, rather than increasing to th~
overspeed condition as it otherwise would once the drive mechanism is accelerated. In oraer that the meter not read a speed which i5 now too low, the control voltag~ from the ~lywheel tachometer is no longer modified so that the meter reads the actual 1ywheel speed, which is now rotating at its pre~etermlned running speed.
Specifically, the present invention concerns a mechanical press having a slide, a mechani~al drive train for reciprocatin~ the slide~ a motor and drive connection drivinglv connec~ed to a flywheel for continu-ously rotating the flywheel when the motor and driveconnaction is energized, and a drive means including a clutch or coupling the rotation o~ the ~lywheel to the mechanical drive train when the clutch is energiz-ed. A speed control provicles a variable speed control voltage to the motor and drive connection to control the speed oI the flywheel, and a tachometer generator is mechanically coupled to the ~l~wheel and p~ovi~es to a speed meter a meter energizing voltage indlcative of the speed o the ~lywheel. The invention is characte-rized by a first means activated only when the clutchis not energized or modi~ying the mater enex~izing voltage so that the meter reads a given normal running speed of the press even though the press is running at a speed higher than the normal r~nning speea, and a second means activated only when the clutch is energiz-ed ~or modifying the speed control voltage so that the ~lywheel is driven at the normal r~lning speed.
The sacond means enables the speed control voltage to cause the flywheel to be driven at higher than 35 its normal running speed as long as the clutch is not energized.
78~5 ~ he method according to the present lnvention concerns the pres~ aescribed above and incluaes the steps o causing the flywheel to run at a speed hlgher than its normal running spee~ when the clutch is deenerg-izea and then run at its normal running speed whenthe clutch is energized; causing the meter to indicate the flywheel speed as heing the normal running speed when the clutch is deener(3ized even though the flywheel is run~ing at a higher speed; and causing the meter to indicate ~he ~rue 1ywheel speed when the clutch is ener~iæ~d.
Figure l is a diagral~matic view o a press incorpor-ating the speed control and indication circuit of the present invention; and lS Figure ~ is a schematic diagram o the press speed control and indication circuit of the present invention.
The speed control and indication system shown in Figure 2 is intended to be incorporated with a mechanical press 2 tFigure 1) which may be of the conventional variety, and incluaes a reciprocating slide 3 mechanically driven by a suitable drive asse~bly 4, such as a crank~haft and conneation assem~ly~
The crankshaft 5 is connecked to a massive fly~7heel 6, which in turn is belt driven by an electxic motor 7 through a variable speed drive mechanism 8. For example~ the speed at which motor output sha~t is driven may be controlled by an eddy current coupling 7. As is conventional, the flywheel 6 is rotated continuously by khe motor 7 at a speed selected by the press operator, and the cranksha~t 5 is rotated only when the clutch 9 is energized thereb~ mechanically ~oupling the rotational energy of the flywheel 6 to the crankshaft 5, which in turn reciprocates .the slide through the connections.
: , . . . .
' . '- ~ . :
., ~ .
:- ~ .............
' ' ' 8~gS
Tu~ning now to Figure 2 r the motor, clutch and flywheel assembly 10 is controlled by a conventional speed control 12, wherein the flywheel 6 rot~tes continu-ously at the preset speed. The control voltage or speed control 12 is generatea by potentiometer 14 and connected to input 16 by line 18; terminal 17 and line l9 carry the bias voltage, With the motor 7 ana flywheel 6 running and the clutch 9 deener~ized, relay contacts 20 are closed by flywheel coil ll thereby shorting out poten,tiometer 22 and applying to input 16 the appropriate voltage to cause speed control 1~ ~o operate the motor 7 and flywheel 6 at an overspeed condition, In this particular en~odiment of the invention, a hi~her than normal voltage will be applied to input 16 over line 13 with potentiometer 22 shortea out.
Tachometer generator 24 produce~ an output voltage on line ~6 which is proportional to the actual speed of flywheel 6 which, when the flywheel 6 is running but the clutch 9 i~ not yet en~rgized, will be higher than the nonmal operating speed of the press 2~ When the press operator is operatiny the press 2, this would normally necessitate that he set the press speed hi~her than the eventual running ~peed so that when the press slows down as the clutch 9 is ener,~ized, the first stroke o the press wil} be at the proper r~nning spe~. This involves either estimatin~ the amount of overspeed necessary to cause th~ press to operate at its normal running speed on ~he first st.roke or re~uires the operator to refer to a table for the proper conversion. According to the present invention, however, press speea meter 28 is causea to read the desired running speed o~ the press at all til~es, whether clutch 9 is energized or not. This is accomplishea by pvtentiometer 30 conneated in parallel with normally , ;' ~86~5 open con~acts 32 between the output ~6 of tachometer generator 24 and ~he input 34 of speed meter 28.
Contacts 32 are open when c~utch 9 is deen~rgized and functlon to decrease the voltage at input 34 so that meter 2~ will xea~ low. Thus, even though ~lyw~eel - 6 may be rotating at its ovexspeed level, poten~iometer 30 causes meter 28 to indicate to the operator that the press is set properly for an eventual press running speed at the desired level.
10Potentiometer 22 is adiustable for the amount of inertial slow down associated with the press 2, and potentio~eter 14 is set for the proper overspeed level necessary to compensate ~or this inertial slowdown.
In operation, before Glutch 9 is energiæed, potentiometer 22 is shorted out and the high voltage on line 18 causes flywheel 6 to be rotated in an overs~eed conditi-on. Since contacts 32 are open, potentiometer 30 causes meter 28 to indicate the preset speed that the potentiometer 14 is set ~or. ~hen clutch 9 is engaged, however, relay contacts 20 are opened and relay contacts 32 are closed. This results in placing potentiometer 22 in series with line 1$ so that a lower voltage is applied at input 16 thereby causin~
~peed control 12 to run rlywheel 6 at a lower speed~
which speed is the normal running speed of the press tha~ is desired ~or that particular operation. Since contacts 32 are now closed~ potentiometer 30 is shorted out and meter 28 is controlled by the actual voltage developed on the output 26 of tachometer generator 24, w~ich voltage corresponds ~o the actual running speed of 1ywheel 6. By timing the opening o contac~s
2~ with the energization of clu~ch 9, as soon as the press speed is slowed down, the lower ~oltage input on l;ne 18 causes press speed control 12 to maintain ~L7~
the speed o fly~iheel 6 at the slowdown level ~rom that point on, rather than permitting the system -to speed up again ~o its overspeed condition~ Assuming that the system i5 operating properly, meter 12 will always indicate the preset running speed of the press, regardless o whether flywheel 6 is rota~ing at its overspeed or normal running speed. This makes it ~asy for the operato~ to see and adjust the actuai speed of -the press to that the proper continuous speed can be maintainea once clutch 9 has been energized.
~ ~ .
the speed o fly~iheel 6 at the slowdown level ~rom that point on, rather than permitting the system -to speed up again ~o its overspeed condition~ Assuming that the system i5 operating properly, meter 12 will always indicate the preset running speed of the press, regardless o whether flywheel 6 is rota~ing at its overspeed or normal running speed. This makes it ~asy for the operato~ to see and adjust the actuai speed of -the press to that the proper continuous speed can be maintainea once clutch 9 has been energized.
~ ~ .
Claims (3)
1. A mechanical press having a slide (3), a mechanical drive train for reciprocating the slide, a motor and drive connection drivingly connected to a flywheel (6) for continuously rotating the flywheel when the motor and drive connection is energized, drive means including a clutch (9) for coupling the rotation of the flywheel to the mechanical drive train when the clutch is energized, a speed control (12) for providing a variable speed control voltage to the motor and drive connection to control the speed of the flywheel, and a tachometer generator (24) mechani-cally coupled to the flywheel to provide to a speed meter (28) a meter energizing voltage indicative of the speed of the flywheel, characterized by: first means (20, 22) activated only when the clutch is not energized for modifying the meter energizing voltage so that the meter indicates a given normal running speed of the press even though the press is running at a speed higher than the normal running speed, and second means (30, 32) activated only when the clutch is energized for modifying the speed control voltage so that the flywheel is driven at the normal running speed, the second means enabling the speed control voltage to cause the flywheel to be driven at higher than its normal running speed as long as the clutch is not energized.
2. The press of Claim 1 characterized in that the first and second modifying means are potentiometers (22, 30) and indude respective relay contacts (20, 32) connected to outputs of said potentiometers, said contacts being always in opposite states of opened or closed.
3. In a mechanical press having a slide (3), a mechanical drive train for reciprocating the slide a motor and drive connection (7) drivingly connected to a flywheel (6) for continuously rotating the flywheel when the motor and drive connection is energized, drive means including a clutch (9) for coupling the rotation of the flywheel to the mechanical drive train when the clutch is energized, a speed control (12 for providing a variable speed control voltage to the motor and drive connection to control the speed of the flywheel, and a tachometer generator (24) mechani-cally coupled to the flywheel to provide to a speed meter (28) a meter energizing voltage indicative of the speed of the flywheel, the method of controlling the speed of the flywheel and indicating to the press operator the speed thereof characterized by: causing the flywheel to run at a speed higher than its normal running speed when the clutch is deenergized and then run at its normal running speed when the clutch is energized, causing the meter to indicate the flywheel speed as being the normal running speed when the clutch is deenergized even though the flywheel is running at a higher speed, and causing the meter to indicate the true flywheel speed when the clutch is energized.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29973581A | 1981-09-08 | 1981-09-08 | |
| US299,735 | 1981-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1178695A true CA1178695A (en) | 1984-11-27 |
Family
ID=23156066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000410227A Expired CA1178695A (en) | 1981-09-08 | 1982-08-26 | Press speed control and indication system |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0074250B1 (en) |
| JP (1) | JPS6018520B2 (en) |
| BR (1) | BR8205272A (en) |
| CA (1) | CA1178695A (en) |
| DE (1) | DE3272145D1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0561604B1 (en) * | 1992-03-16 | 1996-01-24 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Power transmission for mechanical press |
| CN102303419B (en) * | 2011-08-23 | 2013-12-18 | 山东理工大学 | Numerical control method for process curve of crank press |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3407724A (en) * | 1967-02-28 | 1968-10-29 | Danly Machine Corp | Power press acceleration control system |
-
1982
- 1982-08-26 CA CA000410227A patent/CA1178695A/en not_active Expired
- 1982-09-02 DE DE8282304619T patent/DE3272145D1/en not_active Expired
- 1982-09-02 EP EP19820304619 patent/EP0074250B1/en not_active Expired
- 1982-09-07 JP JP15473782A patent/JPS6018520B2/en not_active Expired
- 1982-09-08 BR BR8205272A patent/BR8205272A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0074250A2 (en) | 1983-03-16 |
| DE3272145D1 (en) | 1986-08-28 |
| JPS6018520B2 (en) | 1985-05-10 |
| EP0074250A3 (en) | 1984-05-09 |
| JPS5884698A (en) | 1983-05-20 |
| BR8205272A (en) | 1983-08-16 |
| EP0074250B1 (en) | 1986-07-23 |
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