CN101695763B - Clamping force electro-hydraulic proportion control device with hydraulic lock - Google Patents
Clamping force electro-hydraulic proportion control device with hydraulic lock Download PDFInfo
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- CN101695763B CN101695763B CN2009101533303A CN200910153330A CN101695763B CN 101695763 B CN101695763 B CN 101695763B CN 2009101533303 A CN2009101533303 A CN 2009101533303A CN 200910153330 A CN200910153330 A CN 200910153330A CN 101695763 B CN101695763 B CN 101695763B
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- 239000007788 liquid Substances 0.000 description 9
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- 239000012530 fluid Substances 0.000 description 5
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- 238000000034 method Methods 0.000 description 3
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a clamping force electro-hydraulic proportion control device with a hydraulic lock, which comprises a hydraulic power chuck with a hydraulic lock, a hydraulic pump station and a signal acquisition control system, wherein the hydraulic pump station comprises an oil supply device and an oil pressure adjusting and monitoring device, the oil pressure adjusting and monitoring device is achieved by adopting two electro-hydraulic proportion reducing valves, two safety valves, two tee electromagnetic directional valves and two pressure relays; the signal acquisition control system comprises a controller, two relays controlling the tee electromagnetic directional valves, and a rotating speed transducer arranged at the rear end part of a lathe spindle, wherein electric signal ends of the rotating speed transducer, the electro-hydraulic proportion reducing valves and the pressure relays are respectively electrically connected with the controller, and input electric signal ends of the two relays are respectively electrically connected with the controller. When the lathe spindle changes the speed, the output oil pressure of the hydraulic pump station and the oil supply pressure of a rotating hydraulic cylinder can be infinitely adjusted, the clamping force of the hydraulic power chuck can be kept constant, and the clamping requirement of high-speed cutting of fine-finished or easily-deformed workpieces can be met.
Description
Technical field
The present invention relates to the clamping device of lathe, specifically relate to a kind of clamping force electric-hydraulic proportion control device of the hydraulic power chuck with hydraulic lock.
Background technology
The hydraulic power chuck of band hydraulic lock is the work piece holder of numerically controlled lathe, is made up of the rotating hydraulic cylinder and the power chuck of band hydraulic lock.The rotating hydraulic cylinder inside of band hydraulic lock carries the hydraulic lock of being made up of two hydraulic control one-way valves, and when the output oil feed line explosion of hydraulic power unit, hydraulic lock is to the rotating hydraulic cylinder pressurize of band hydraulic lock.The charge oil pressure of the rotating hydraulic cylinder of band hydraulic lock is regulated by manually adjustable pressure-reducing valve or overflow valve, after the initial setting of charge oil pressure, in the process of main axis rotation, keep invariable, rising along with rotating speed, the centrifugal force of claw increases, the clamping force of the outer bowlder of power chuck holding workpiece reduces, and the clamping force loss has limited the raising of hydraulic power chuck rotating speed.
Improving the initial charge oil pressure of the rotating hydraulic cylinder of band hydraulic lock, increase the initial clamping force of power chuck, allow power chuck still have enough clamping forces under high rotating speed, is a kind of effective ways that improve the hydraulic power chuck rotating speed of band hydraulic lock.But in fine finishining, excessive initial clamping force can be destroyed workpiece surface quality, and the material of easy deformation such as copper, aluminium, engineering plastics can be bad by folder under very big initial clamping force effect.When being with the hydraulic power chuck holding workpiece endoporus of hydraulic lock, clamping force increases along with the rising of rotating speed, excessive clamping force can be destroyed the workpiece of fine finishining and easy deformation equally, and low excessively initial charge oil pressure can cause the initial clamping force of power chuck low excessively again, and clamping is unreliable.
In the high-speed turning processing of high speed and precision turning processing and yielding workpiece, how to make the both reliable holding workpiece of hydraulic power chuck of band hydraulic lock, can reach high rotating speed again, be a difficult problem.
Summary of the invention
Therefore the objective of the invention is to propose a kind of clamping force electric-hydraulic proportion control device of the hydraulic power chuck with hydraulic lock, the clamping force that realizes the hydraulic power chuck of band hydraulic lock keeps invariable when lathe spindle rotates, during the oil feed line explosion of rotating hydraulic cylinder of band hydraulic lock, hydraulic lock still can be to the rotating hydraulic cylinder pressurize.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention includes the hydraulic power chuck of band hydraulic lock, regulate the hydraulic power unit that monitoring device is formed, signal acquisition control system by fueller, oil pressure;
1) described oil pressure is regulated monitoring device: comprise two electro-hydraulic proportional reducing valves, two safety valves, two three-way solenoid valves and two pressure switches; The oil-in of first electro-hydraulic proportional reducing valve is connected with the high pressure oil-out of fueller, its oil-out is connected with the high pressure oil-in of first three-way solenoid valve and the oil-in of first safety valve, its oil return opening is connected with fuel tank, the oil-out of first safety valve is connected with fuel tank, the oil return opening of first three-way solenoid valve is connected with fuel tank, and the output oil port of first three-way solenoid valve is connected with the oil-in of first pressure switch and first oil inlet and outlet of the rotating hydraulic cylinder of band hydraulic lock;
The oil-in of second electro-hydraulic proportional reducing valve is connected with the high pressure oil-out of fueller, its oil-out is connected with the high pressure oil-in of second three-way solenoid valve and the oil-in of second safety valve, its oil return opening is connected with fuel tank, the oil-out of second safety valve is connected with fuel tank, the oil return opening of second three-way solenoid valve is connected with fuel tank, and the output oil port of second three-way solenoid valve is connected with the oil-in of second pressure switch and second oil inlet and outlet of the rotating hydraulic cylinder of band hydraulic lock;
2) described signal acquisition control system: comprise controller, rotating speed transmitter and two relays; The rotating speed transmitter is installed in the rearward end of lathe spindle, and its signal of telecommunication end is electrically connected with controller; The output signal of telecommunication end of first relay is connected with the signal of telecommunication end of first three-way solenoid valve, the output signal of telecommunication end of second relay is connected with the signal of telecommunication end of second three-way solenoid valve, and the input electrical signal end of first relay and second relay is connected with controller respectively; The control signal of telecommunication end of first electro-hydraulic proportional reducing valve and second electro-hydraulic proportional reducing valve is electrically connected with controller respectively; First pressure switch and the second pressure switch signal of telecommunication end are electrically connected with controller respectively.
The electric-hydraulic proportion control device of described a kind of hydraulic power chuck clamping force with hydraulic lock, it is characterized in that: first pressure transmitter is installed on the oil-out of described first electro-hydraulic proportional reducing valve, second pressure transmitter is installed on the oil-out of second electro-hydraulic proportional reducing valve, and the signal of telecommunication end of first pressure transmitter and second pressure transmitter is electrically connected with controller respectively.
The surperficial installing force sensor of the claw of described hydraulic power chuck, on the outer circumference surface of claw wireless signal transmitter is installed, the signal of telecommunication end of power sensor is connected with the signal of telecommunication end of wireless signal transmitter, wireless signal receiver is in the face of wireless signal transmitter, it accepts the signal that wireless signal transmitter sends, and the signal of telecommunication end of wireless signal receiver output is connected with controller.
Described electro-hydraulic proportional reducing valve is direct action type electrohydraulic proportional two logical pressure-reducing valves, pilot-operated type electric-hydraulic proportion two logical pressure-reducing valve, direct action type electrohydraulic proportional three-way pressure reducing valve or pilot-operated type electric-hydraulic proportion three-way pressure reducing valves.
The beneficial effect that the present invention has is:
In the process of lathe spindle acceleration and deceleration, but the charge oil pressure of the rotating hydraulic cylinder of the output oil pressure of step-less adjustment hydraulic power unit and band hydraulic lock, the clamping force of the hydraulic power chuck of retainer belt hydraulic lock is invariable, when clamping finishing workpiece or yielding workpiece, can realize reliable clamping, can realize high rotating speed again, satisfy the requirement of high-speed cutting; Adopt pressure feedback control and clamping force FEEDBACK CONTROL, can improve the control accuracy of hydraulic power chuck clamping force; During the high pressure output oil pipe explosion of hydraulic power unit, utilize three-way solenoid valve that the oil feeding line of the rotating hydraulic cylinder of band hydraulic lock is communicated with fuel tank, guarantee that hydraulic lock can be to the normal pressurize of high pressure chest inner fluid of the rotating hydraulic cylinder of being with hydraulic lock.
Description of drawings
Fig. 1 is the structural principle schematic diagram of first embodiment of the invention.
Fig. 2 is the structural principle schematic diagram of second embodiment of the invention.
Among the figure: 1. bar-shaped workpieces, 2. claw, 3. power chuck, 4. lathe spindle, 5. trombone slide, 6. counter flange, 7. be with the rotating hydraulic cylinder of hydraulic lock, 8. hydraulic lock, 9. oil return cover, 10. support, 11. fuel tanks, 12. filters, 13. variable pump, 14. motors, 15. accumulators, 16. Pressure gauge, 17. check valves, 18. accurate filters, 19,20. electro-hydraulic proportional reducing valve, 21,22. pressure transmitter, 23,24. Pressure gauge, 25,26. safety valve, 27,28. three-way solenoid valve, 29,30. pressure switch, 31. power sensors, 32. wireless signal transmitter, 33. wireless signal receiver, 34. rotating speed transmitters, 35. controllers, 36,37. relay, 1 '. disk type work.
The specific embodiment
The invention will be further described by drawings and Examples.
Embodiments of the invention the present invention includes the hydraulic power chuck of band hydraulic lock as shown in Figure 1, regulate the hydraulic power unit that monitoring device is formed, signal acquisition control system by fueller, oil pressure.
The hydraulic power chuck of band hydraulic lock is made up of the rotating hydraulic cylinder 7 of power chuck 3 and band hydraulic lock, the inside of the rotating hydraulic cylinder 7 of band hydraulic lock carries the hydraulic lock of being made up of two hydraulically-controlled one-way valves 8, power chuck 3 links to each other with the front end of lathe spindle 4, the rotating hydraulic cylinder 7 of band hydraulic lock links to each other with the tail end of lathe spindle 4 by counter flange 6, the two ends of trombone slide 5 link to each other with the piston rod of the rotating hydraulic cylinder 7 of being with hydraulic lock and the wedge-catch system of power chuck 3 respectively, the rotating hydraulic cylinder 7 of band hydraulic lock drives power chuck 3 clampings or unclamps workpiece 1 by trombone slide 5, the cylinder body of the rotating hydraulic cylinder 7 of band hydraulic lock and piston rod are with lathe spindle 4 rotations, and the oil return cover 9 of the rotating hydraulic cylinder 7 of band hydraulic lock is fixed on the body of lathe bed by support 10.
The fueller of hydraulic power unit comprises fuel tank 11, filter 12, hydraulic pump 13, motor 14, accumulator 15, Pressure gauge 16, includes the accurate filter 18 of check valve 17, the hydraulic pump 13 of hydraulic power unit is under the driving of motor 14, from 12 oil suctions of fuel tank 11 process filters, the hydraulic oil of hydraulic pump 13 outputs outputs to the high pressure oil-out of fueller after accumulator 15 voltage stabilizings, accurate filter 18 filter, Pressure gauge 16 is measured the outlet pressure of hydraulic pump.
The oil pressure of hydraulic power unit is regulated monitoring device and is comprised two electro-hydraulic proportional reducing valves 19 and 20, two Pressure gauges 23 and 24, two safety valves 25 and 26, two three- way solenoid valves 27 and 28, two pressure switches 29 and 30; The oil-in of first electro-hydraulic proportional reducing valve 19 is connected with the high pressure oil-out of fueller, its oil-out is connected with the high pressure oil-in of first three-way solenoid valve 27 and the oil-in of first safety valve 25, its oil return opening is connected with fuel tank 11, the oil-out of first safety valve 25 is connected with fuel tank 11, the oil return opening of first three-way solenoid valve 27 is connected with fuel tank 11, the output oil port of first three-way solenoid valve 27 is connected with the oil-in of first pressure switch 29 and first oil inlet and outlet of the rotating hydraulic cylinder 7 of band hydraulic lock, and the oil-in of first Pressure gauge 23 is connected with the oil-out of first electro-hydraulic proportional reducing valve 19.
The oil-in of second electro-hydraulic proportional reducing valve 20 is connected with the high pressure oil-out of fueller, its oil-out is connected with the high pressure oil-in of second three-way solenoid valve 28 and the oil-in of second safety valve 26, its oil return opening is connected with fuel tank 11, the oil-out of second safety valve 26 is connected with fuel tank 11, the oil return opening of second three-way solenoid valve 28 is connected with fuel tank 11, the output oil port of second three-way solenoid valve 28 is connected with the oil-in of second pressure switch 30 and second oil inlet and outlet of the rotating hydraulic cylinder 7 of band hydraulic lock, whether the output oil pressure of monitoring hydraulic power unit is higher than the minimum charge oil pressure that rotating hydraulic cylinder 7 requires, and the oil-in of second Pressure gauge 24 is connected with the oil-out of second electro-hydraulic proportional reducing valve 20.
Signal acquisition control system comprises controller 35 (controller can adopt PLC controller or industrial computer), rotating speed transmitter 34, two relays 36,37, two pressure transmitters 21 and 22, power sensor 31, wireless signal transmitter 32, wireless signal receiver 33, rotating speed transmitter 34 is installed in the rearward end of lathe spindle 4, its signal of telecommunication end is electrically connected with controller 35, first pressure transmitter 21 is on the oil-out of first electro-hydraulic proportional reducing valve 19, second pressure transmitter 22 is installed on the oil-out of second electro-hydraulic proportional reducing valve 20, the signal of telecommunication end of first pressure transmitter 21 and second pressure transmitter 22 is electrically connected with controller 35 respectively, power sensor 31 is installed in the surface of claw 2 of hydraulic power chuck (in the three-jaw power chuck, a power sensor can be installed on a claw, also a power sensor can be installed respectively on each claw), wireless signal transmitter 32 is installed on the outer circumference surface of claw 2, the signal of telecommunication end of power sensor 31 is connected with the signal of telecommunication end of wireless signal transmitter 32, wireless signal receiver 33 is in the face of wireless signal transmitter 32, it accepts the signal that wireless signal transmitter 32 sends, the signal of telecommunication end of wireless signal receiver 33 outputs is connected with controller 35, two pressure switches 29 and 30 signal of telecommunication end are electrically connected with controller 35 respectively, two electro-hydraulic proportional reducing valves 19 and 20 control signal of telecommunication end are electrically connected with controller 35 respectively, the output signal of telecommunication end of first relay 36 and second relay 37 is connected with the signal of telecommunication end of first three-way solenoid valve 27 and second three-way solenoid valve 28 respectively, and two relays 36 are connected with controller 35 respectively with 37 input electrical signal end.
As shown in Figure 1, the periphery of power chuck 3 clamping rod workpiece 1.When hydraulic power unit is not opened, two three-way solenoid valves 27 and all energisings of control coil of 28, three- way solenoid valve 27 and 28 all is operated in position, a left side, and two pressure chambers of the rotating hydraulic cylinder 7 of band hydraulic lock communicate with fuel tank 11.After motor 14 is opened, the oil-out of two electro-hydraulic proportional reducing valves 19,20 is exported minimum pressure respectively, controller 35 output control signals are operated in right position through first three-way solenoid valve 27 commutations of first relay, 36 controls, the fluid of first electro-hydraulic proportional reducing valve, 19 outputs enters the right chamber of the rotating hydraulic cylinder 7 of band hydraulic lock through first three-way solenoid valve 27, piston rod drives the periphery that power chuck 3 clamps bar-shaped workpieces 1, and controller 35 output signals improve the oil-out pressure of first electro-hydraulic proportional reducing valve 19 to initial pressure.After lathe spindle 4 begins rotation, the speed of mainshaft that rotating speed transmitter 34 records feeds back to controller 35, rising along with lathe spindle 4 rotating speeds, controller 35 output signals are controlled the right cavity pressure that first electricity liquid ratio relief valve 19 improves the oil-out pressure of first electro-hydraulic proportional reducing valve 19 and is with the rotating hydraulic cylinder 7 of hydraulic lock, increase piston rod pulling force left, remedy power chuck 3 is lost by centrifugal action because of claw 2 clamping force, keep the clamping force of power chuck 3 invariable.The workpiece cutting finishes, lathe spindle 4 rotating speeds begin to reduce, controller 35 output control signals are operated in right position through 28 commutations of second three-way solenoid valve of second relay, 37 controls, the fluid of second electro-hydraulic proportional reducing valve, 20 outputs enters the left chamber of the rotating hydraulic cylinder 7 of band hydraulic lock through second three-way solenoid valve 28, continuous reduction along with rotating speed, improve the oil liquid pressure of second electro-hydraulic proportional reducing valve, 20 outputs gradually, the power output of the rotating hydraulic cylinder 7 of band hydraulic lock reduces gradually, offset the clamping force that power chuck 3 reduces to increase because of claw centrifugal force, keep the clamping force of power chuck 3 invariable.After lathe spindle 4 stops operating, controller 35 output control signals are operated in position, a left side through first three-way solenoid valve 27 commutations of first relay, 36 controls, and improve the oil liquid pressure of second electro-hydraulic proportional reducing valve 20 output, the piston rod of the rotating hydraulic cylinder 7 of band hydraulic lock drives power chuck 3 and unclamps bar-shaped workpieces 1, controller 35 output control signals reduce the oil liquid pressure of second electro-hydraulic proportional reducing valve, 20 outputs to minimum pressure, controller 35 output control signals are operated in position, a left side through 28 commutations of second three-way solenoid valve of second relay, 37 controls, begin the next workpiece of clamping again.Rotated 4 o'clock at lathe spindle, if the output oil pressure of first three-way solenoid valve 27 reduces to zero suddenly because of reasons such as oil pipe explosions, first pressure switch 29 outputs signal to controller 35, controller 35 output control signals are operated in position, a left side through 28 commutations of second three-way solenoid valve of second relay, 37 controls, the output oil port of second three-way solenoid valve 28 communicates with fuel tank, guarantees hydraulic lock 8 operate as normal.The output fluid of two safety valves 25 and 26 restriction hydraulic power units are not higher than the maximum charge oil pressure that the rotating hydraulic cylinder 7 of be with hydraulic lock is permitted usefulness.
As shown in Figure 2, the inner hole surface of power chuck 3 clamping disk type works 1 '.When hydraulic power unit is not opened, two three-way solenoid valves 27 and all energisings of control coil of 28, three- way solenoid valve 27 and 28 all is operated in position, a left side, and two pressure chambers of the rotating hydraulic cylinder 7 of band hydraulic lock communicate with fuel tank 11.After motor 14 is opened, the oil-out of two electro-hydraulic proportional reducing valves 19,20 is exported minimum pressure respectively, controller 35 output control signals are operated in right position through 28 commutations of second three-way solenoid valve of second relay, 37 controls, the fluid of second electro-hydraulic proportional reducing valve, 20 outputs enters the left chamber of the rotating hydraulic cylinder 7 of band hydraulic lock through second three-way solenoid valve 28, piston rod drives the inner hole surface of power chuck 3 stretching disk type works 1 ' to the right, and controller 35 output signals improve the oil-out pressure of second electro-hydraulic proportional reducing valve 20 to initial pressure.After lathe spindle 4 begins rotation, controller 35 output signals are operated in right position through 27 commutations of first relay, 36 control three-way solenoid valves, the speed of mainshaft that rotating speed transmitter 34 records feeds back to controller 35, rising along with lathe spindle 4 rotating speeds, controller 35 output signals are controlled first electricity liquid ratio relief valve 19 and are improved the oil-out pressure of first electro-hydraulic proportional reducing valve 19 and be with the oil liquid pressure in the rotating hydraulic cylinder 7 right chambeies of hydraulic lock, reduce piston rod thrust to the right, offsetting power chuck 3 increases the clamping force that improves because of claw centrifugal force, keeps the clamping force of power chuck 3 invariable.The workpiece cutting finishes, along with the rotating speed of lathe spindle 4 constantly reduces, controller 35 output signals are controlled the oil liquid pressure that first electro-hydraulic proportional reducing valve 19 reduces its output gradually, the thrust output of the rotating hydraulic cylinder 7 of band hydraulic lock improves gradually, remedy power chuck 3 because of claw centrifugal force reduce to reduce clamping force, keep the clamping force of power chuck 3 invariable.After lathe spindle 4 stops operating, controller 35 output control signals are operated in position, a left side through 28 commutations of second three-way solenoid valve of second relay, 37 controls, and improve the oil liquid pressure of first electro-hydraulic proportional reducing valve 19 output, the piston rod of the rotating hydraulic cylinder 7 of band hydraulic lock drives power chuck 3 left and unclamps disk type work 1 ', controller 35 output signals are controlled first electro-hydraulic proportional reducing valve 19 and are reduced the oil liquid pressure of its output to minimum pressure, first three-way solenoid valve 27 commutations are operated in position, a left side, begin the next workpiece of clamping again.Rotated 4 o'clock at lathe spindle, if the output oil pressure of second three-way solenoid valve 28 reduces to zero suddenly because of reasons such as oil pipe explosions, second pressure switch 30 outputs signal to controller 35, controller 35 output signals are operated in position, a left side through first three-way solenoid valve 27 commutations of first relay, 36 controls, the output oil port of first three-way solenoid valve 27 communicates with fuel tank, guarantees hydraulic lock 8 operate as normal.
Claims (4)
1. the clamping force electric-hydraulic proportion control device with the hydraulic power chuck of hydraulic lock comprises the hydraulic power chuck of being with hydraulic lock, regulates the hydraulic power unit that monitoring device is formed, signal acquisition control system by fueller, oil pressure; It is characterized in that:
1) described oil pressure is regulated monitoring device: comprise two electro-hydraulic proportional reducing valves (19,20), two safety valves (25,26), two three-way solenoid valves (27,28) and two pressure switches (29,30); The oil-in of first electro-hydraulic proportional reducing valve (19) is connected with the high pressure oil-out of fueller, its oil-out is connected with the high pressure oil-in of first three-way solenoid valve (27) and the oil-in of first safety valve (25), its oil return opening is connected with fuel tank (11), the oil-out of first safety valve (25) is connected with fuel tank (11), the oil return opening of first three-way solenoid valve (27) is connected with fuel tank (11), and the output oil port of first three-way solenoid valve (27) is connected with the oil-in of first pressure switch (29) and first oil inlet and outlet of the rotating hydraulic cylinder (7) of band hydraulic lock;
The oil-in of second electro-hydraulic proportional reducing valve (20) is connected with the high pressure oil-out of fueller, its oil-out is connected with the high pressure oil-in of second three-way solenoid valve (28) and the oil-in of second safety valve (26), its oil return opening is connected with fuel tank (11), the oil-out of second safety valve (26) is connected with fuel tank (11), the oil return opening of second three-way solenoid valve (28) is connected with fuel tank (11), and the output oil port of second three-way solenoid valve (28) is connected with the oil-in of second pressure switch (30) and second oil inlet and outlet of the rotating hydraulic cylinder (7) of band hydraulic lock;
2) described signal acquisition control system: comprise controller (35), rotating speed transmitter (34) and two relays (36,37); Rotating speed transmitter (34) is installed in the rearward end of lathe spindle (4), and its signal of telecommunication end is electrically connected with controller (35); The output signal of telecommunication end of first relay (36) is connected with the signal of telecommunication end of first three-way solenoid valve (27), the output signal of telecommunication end of second relay (37) is connected with the signal of telecommunication end of second three-way solenoid valve (28), and the input electrical signal end of first relay (36) and second relay (37) is connected with controller (35) respectively; The control signal of telecommunication end of first electro-hydraulic proportional reducing valve (19) and second electro-hydraulic proportional reducing valve (20) is electrically connected with controller (35) respectively; First pressure switch (29) and second pressure switch (30) signal of telecommunication end are electrically connected with controller (35) respectively.
2. the clamping force electric-hydraulic proportion control device of a kind of hydraulic power chuck with hydraulic lock according to claim 1, it is characterized in that: first pressure transmitter (21) is installed on the oil-out of described first electro-hydraulic proportional reducing valve (19), second pressure transmitter (22) is installed on the oil-out of second electro-hydraulic proportional reducing valve (20), and the signal of telecommunication end of first pressure transmitter (21) and second pressure transmitter (22) is electrically connected with controller (35) respectively.
3. the clamping force electric-hydraulic proportion control device of a kind of hydraulic power chuck with hydraulic lock according to claim 1 and 2, it is characterized in that: the surperficial installing force sensor (31) of the claw of described hydraulic power chuck (2), wireless signal transmitter (32) is installed on the outer circumference surface of claw (2), the signal of telecommunication end of power sensor (31) is connected with the signal of telecommunication end of wireless signal transmitter (32), wireless signal receiver (33) is in the face of wireless signal transmitter (32), it accepts the signal that wireless signal transmitter (32) sends, and the signal of telecommunication end of wireless signal receiver (33) output is connected with controller (35).
4. the clamping force electric-hydraulic proportion control device of a kind of hydraulic power chuck with hydraulic lock according to claim 1 and 2 is characterized in that: described electro-hydraulic proportional reducing valve is direct action type electrohydraulic proportional two logical pressure-reducing valves, pilot-operated type electric-hydraulic proportion two logical pressure-reducing valve, direct action type electrohydraulic proportional three-way pressure reducing valve or pilot-operated type electric-hydraulic proportion three-way pressure reducing valves.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101533303A CN101695763B (en) | 2009-10-15 | 2009-10-15 | Clamping force electro-hydraulic proportion control device with hydraulic lock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101533303A CN101695763B (en) | 2009-10-15 | 2009-10-15 | Clamping force electro-hydraulic proportion control device with hydraulic lock |
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| CN101695763A CN101695763A (en) | 2010-04-21 |
| CN101695763B true CN101695763B (en) | 2010-12-08 |
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| CN102990552A (en) * | 2012-11-19 | 2013-03-27 | 无锡市京锡冶金液压机电有限公司 | Method for arranging engine connecting rod clamping structure |
| CN112975529B (en) * | 2021-03-22 | 2021-09-14 | 玉环仪表机床制造厂 | Double-spindle machining machine tool and control method thereof |
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