CN108747585B - Machine tool spindle clamping force on-line monitoring system - Google Patents
Machine tool spindle clamping force on-line monitoring system Download PDFInfo
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- CN108747585B CN108747585B CN201810731330.6A CN201810731330A CN108747585B CN 108747585 B CN108747585 B CN 108747585B CN 201810731330 A CN201810731330 A CN 201810731330A CN 108747585 B CN108747585 B CN 108747585B
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- main shaft
- driven rod
- rod
- secondary driven
- driven lever
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims description 18
- 238000005452 bending Methods 0.000 claims description 17
- 239000003381 stabilizer Substances 0.000 claims description 9
- 235000014676 Phragmites communis Nutrition 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 4
- 244000273256 Phragmites communis Species 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention discloses an online monitoring system for clamping force of a machine tool spindle, which comprises a spindle shell, wherein a pull rod is arranged in the spindle shell, and the online monitoring system is characterized in that: the utility model provides a be located the outside pull rod end of main shaft shell and be provided with a set of displacement and reduce the mechanism, displacement reduce the mechanism and include primary driven lever, secondary driven lever and be located a plurality of bracing pieces on primary driven lever and the secondary driven lever respectively, primary driven lever head end is fixed in pull rod tip side, and the end is connected secondary driven lever through the bracing piece, the end of secondary driven lever passes through the bracing piece setting on the up end of main shaft shell, be provided with a flexure strip between the front end of secondary driven lever and the up end of main shaft shell, one side of flexure strip is pasted and is fixed with piezoceramics film, and the opposite side is pasted and is fixed with giant magnetostrictive thin piece. The invention can ensure that the real-time recovery elasticity of the disc-shaped elastic sheet in the main shaft of the machine tool is monitored in the whole process in the working process of the machine tool, and the reliability of the main shaft clamping tool handle is improved.
Description
[ field of technology ]
The invention relates to the technical field of machine tool tools, in particular to an online monitoring system for clamping force of a machine tool spindle.
[ background Art ]
The main shaft of vertical machining center is tightly pressed from both sides and is pressed from both sides, and one is pressed from both sides tightly, and two kinds of clamping modes are all utilized the cooperation slip of wedge to realize pressing from both sides tightly, and wherein the main shaft structure that the pulling force pressed from both sides tightly is simpler, and this helps stabilizing main shaft assembly precision, guarantees the processability.
The tension clamping type main shaft is internally provided with a pull rod, tens of layers of disc-shaped elastic pieces are arranged on the pull rod, and the pull rod is used as the lifting clamping force of the knife handle Latin by means of the restoring elasticity of the disc-shaped elastic pieces. The machine tool spindle adopting the structure has the advantages that in the continuous use process, the recovery elasticity of the dish-shaped elastic sheet is in a descending trend, once the recovery elasticity of the dish-shaped elastic sheet is reduced to a certain value, the clamping of the spindle to the tool handle can be invalid, the hidden danger of processing accidents exists, and the processing precision can be reduced.
[ invention ]
The invention aims to solve the problems in the prior art, and provides an online monitoring system for the clamping force of a machine tool spindle, which can ensure that the real-time recovery elasticity of a dished elastic sheet in the spindle is monitored in the whole process in the working process of the machine tool, and the reliability of the spindle clamping tool handle is improved.
In order to achieve the above purpose, the invention provides an online monitoring system for clamping force of a machine tool spindle, comprising a spindle housing, wherein a pull rod is arranged in the spindle housing, a plurality of disc reeds are sleeved on the pull rod, the upper end of the pull rod passes through the spindle housing and is fixedly connected with an output shaft of a tool beating cylinder through a connecting sleeve, and the online monitoring system is characterized in that: the tie rod end outside the main shaft shell is provided with a group of displacement reduction mechanism, the displacement reduction mechanism comprises a primary driven rod, a secondary driven rod and a plurality of support rods respectively positioned on the primary driven rod and the secondary driven rod, the head end of the primary driven rod is fixed on the side surface of the end part of the tie rod, the tail end of the primary driven rod is connected with the secondary driven rod through the support rods, the tail end of the secondary driven rod is arranged on the upper end surface of the main shaft shell through the support rods, a bending piece is arranged between the front end of the secondary driven rod and the upper end face of the main shaft shell, one side of the bending piece is fixedly stuck with a piezoelectric ceramic film, the other side of the bending piece is fixedly stuck with a giant magnetostrictive film, and an eddy current coil with multiple turns is sleeved on the combination of the bending piece, the piezoelectric ceramic film and the giant magnetostrictive film; the utility model discloses a high-voltage ceramic piezoelectric ceramic device, including piezoelectric ceramic film, vortex coil's wire, signal amplifier, electrode line, transformer, voltage stabilizer, second wave filter and controller, the wire both ends of vortex coil connect in proper order on a signal amplifier, signal amplifier has connected gradually current stabilizer, first wave filter and controller's input, electrode line has connected gradually transformer, voltage stabilizer, second wave filter and controller's input on the two sides of piezoelectric ceramic film, the output of controller is connected with the solenoid valve through the wire, the solenoid valve is connected through the air duct with air pump and knife cylinder respectively.
Preferably, the tool striking cylinder is fixed at the upper end of the main shaft shell through a supporting frame.
Preferably, the joints of the primary driven rod, the secondary driven rod and the supporting rod of the displacement reduction mechanism are flexible hinge structures.
Preferably, the controller is a PMC controller of a FANUC system.
Preferably, the piezoelectric ceramic film and the giant magnetostrictive thin sheet are adhered to the bending sheet by epoxy resin.
The invention has the beneficial effects that: the invention monitors the elasticity of the disc reed on the main shaft pull rod in real time by arranging the detection module which is related to the movement of the main shaft pull rod at the upper end of the main shaft shell, creatively adopts a mode of combining the piezoelectric ceramic film and the giant magnetostriction thin sheet to detect on the basis of the main thought, and two groups of collected signals with different principles can be mutually evidence, thereby preventing the malicious misjudgment of obvious errors on the normal action of the main shaft and ensuring the working reliability of the main shaft.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
In the figure: 1-spindle housing, 2-disc reed, 3-pull rod, 4-tool driving cylinder, 5-support frame, 6-signal amplifier, 7-transformer, 8-current stabilizer, 9-voltage stabilizer, 10-first filter, 11-second filter, 12-controller, 13-solenoid valve, 14-air pump, 15-primary driven rod, 16-secondary driven rod, 17-bending piece, 18-piezoceramic film, 19-giant magnetostriction thin slice, 20-vortex coil.
[ detailed description ] of the invention
Referring to fig. 1 and 2, the invention relates to an online monitoring system for clamping force of a machine tool spindle, which comprises a spindle housing 1, wherein a pull rod 3 is arranged in the spindle housing 1, a plurality of disc reeds 2 are sleeved on the pull rod 3, the upper end of the pull rod 3 passes through the spindle housing 1 and is fixedly connected with an output shaft of a tool striking cylinder 4 through a connecting sleeve, and the online monitoring system is characterized in that: the end of the pull rod 3 positioned outside the main shaft housing 1 is provided with a group of displacement reduction mechanisms, each displacement reduction mechanism comprises a primary driven rod 15, a secondary driven rod 16 and a plurality of support rods positioned on the primary driven rod 15 and the secondary driven rod 16 respectively, the head end of the primary driven rod 15 is fixed on the side surface of the end part of the pull rod 3, the tail end of the primary driven rod is connected with the secondary driven rod 16 through the support rods, the tail end of the secondary driven rod 16 is arranged on the upper end surface of the main shaft housing 1 through the support rods, a bending piece 17 is arranged between the front end of the secondary driven rod 16 and the upper end surface of the main shaft housing 1, one side of the bending piece 17 is fixedly stuck with a piezoelectric ceramic film 18, the other side of the bending piece 17 is fixedly stuck with a giant magnetostrictive film 19, and a combination of the piezoelectric ceramic film 18 and the giant magnetostrictive film 19 is sleeved with a multi-turn eddy current coil 20; the two ends of the lead of the eddy current coil 20 are connected to a signal amplifier 6, the signal amplifier 6 is sequentially connected with a current stabilizer 8, a first filter 10 and the input end of a controller 12, electrode wires are respectively led out from two side surfaces of a piezoelectric ceramic film 18, the electrode wires are sequentially connected with the input ends of a transformer 7, a voltage stabilizer 9, a second filter 11 and the controller 12, the output end of the controller 12 is connected with an electromagnetic valve 13 through the lead, and the electromagnetic valve 13 is respectively connected with an air pump 14 and a knife cylinder 4 through an air duct. The tool striking cylinder 4 is fixed at the upper end of the main shaft shell 1 through a supporting frame 5. The joints of the primary driven rod 15, the secondary driven rod 16 and the supporting rod of the displacement reduction mechanism are flexible hinge structures. The controller 12 is a PMC controller of a FANUC system. The piezoelectric ceramic film 18 and the giant magnetostrictive thin sheet 19 are adhered to the bending sheet 17 by epoxy resin.
The working process of the invention comprises the following steps:
in the working process of the machine tool spindle clamping force on-line monitoring system, a controller 12 leads to high potential on an electromagnetic valve 13, the electromagnetic valve 13 is conducted, high-pressure gas in an air pump 14 enters into a return cavity of a tool driving cylinder 4, an output shaft of the tool driving cylinder 4 is contracted, a pull rod 3 is further moved upwards, the pull rod 3 is moved upwards, a disc reed 2 is pressurized and compressed, and as the pull rod 3 is moved upwards, the tail end of a primary driven rod 15 is driven to be pressed downwards, the tail end of a secondary driven rod 16 is driven to be pressed downwards, and bending pressure is generated on a bending piece 17; the piezoelectric ceramic film 18 receives pressure to generate electric charge, if the knife striking cylinder 4 continuously switches the telescopic state of the output shaft, continuous voltage can be generated at the piezoelectric ceramic film 18, meanwhile, the giant magnetostrictive thin sheet 19 is continuously switched to stretch and compress, the magnetic field transformation can enable continuous current to be generated in the eddy current coil 20, the two electric signals enter the controller 12 for checking and comparing after passing through respective processing circuits, the controller 12 is provided with a difference threshold value for judging, if the calculated pressure value deviation of the two electric signals is smaller than the set threshold value, the judging signal is valid, the elasticity validity of the disc reed 2 is judged according to the valid signal, on-line monitoring is realized, and if the disc reed 2 is judged to be invalid, the controller 12 enables the electromagnetic valve 13 to reset to stop further work of the knife striking cylinder 4.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (3)
1. The utility model provides a lathe main shaft clamping force on-line monitoring system, includes the main shaft shell, be provided with the pull rod in the main shaft shell, the cover is equipped with multi-disc dish reed on the pull rod, and the pull rod upper end passes the main shaft shell to through the output shaft fixed connection of connecting sleeve and tool driving jar, its characterized in that: the tie rod end outside the main shaft shell is provided with a group of displacement reduction mechanism, the displacement reduction mechanism comprises a primary driven rod, a secondary driven rod and a plurality of support rods respectively positioned on the primary driven rod and the secondary driven rod, the head end of the primary driven rod is fixed on the side surface of the end part of the tie rod, the tail end of the primary driven rod is connected with the secondary driven rod through the support rods, the tail end of the secondary driven rod is arranged on the upper end surface of the main shaft shell through the support rods, a bending piece is arranged between the front end of the secondary driven rod and the upper end face of the main shaft shell, one side of the bending piece is fixedly stuck with a piezoelectric ceramic film, the other side of the bending piece is fixedly stuck with a giant magnetostrictive film, and an eddy current coil with multiple turns is sleeved on the combination of the bending piece, the piezoelectric ceramic film and the giant magnetostrictive film; the two ends of a lead of the eddy current coil are connected to a signal amplifier, the signal amplifier is sequentially connected with a current stabilizer, a first filter and the input end of a controller, electrode wires are respectively led out from two side surfaces of the piezoelectric ceramic film, the electrode wires are sequentially connected with a transformer, the voltage stabilizer, a second filter and the input end of the controller, the output end of the controller is connected with an electromagnetic valve through a lead, and the electromagnetic valve is respectively connected with an air pump and a knife cylinder through an air duct; the tool beating cylinder is fixed at the upper end of the main shaft shell through a support frame; the joints of the primary driven rod, the secondary driven rod and the supporting rod of the displacement shrinking mechanism are flexible hinge structures.
2. The machine tool spindle clamping force on-line monitoring system of claim 1, wherein: the controller is a PMC controller of the FANUC system.
3. The machine tool spindle clamping force on-line monitoring system of claim 1, wherein: the piezoelectric ceramic film and the giant magnetostrictive thin sheet are adhered to the bending sheet by adopting epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810731330.6A CN108747585B (en) | 2018-07-05 | 2018-07-05 | Machine tool spindle clamping force on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810731330.6A CN108747585B (en) | 2018-07-05 | 2018-07-05 | Machine tool spindle clamping force on-line monitoring system |
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| Publication Number | Publication Date |
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| CN108747585A CN108747585A (en) | 2018-11-06 |
| CN108747585B true CN108747585B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810731330.6A Active CN108747585B (en) | 2018-07-05 | 2018-07-05 | Machine tool spindle clamping force on-line monitoring system |
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| CN113770808B (en) * | 2021-09-10 | 2023-07-14 | 衢州学院 | Multi-source information acquisition device and method for machine tool complete machine |
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| JPH09303450A (en) * | 1996-05-10 | 1997-11-25 | Akebono Brake Res & Dev Center Ltd | Break control system |
| CN1206865A (en) * | 1998-07-10 | 1999-02-03 | 清华大学 | Creeping type piezoelectric/electrostrictive microfeed positioner |
| RU2306621C1 (en) * | 2006-08-11 | 2007-09-20 | ЗАО "Нанотехнология-МДТ" | Two-coordinate micro-positioner |
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| CN203798360U (en) * | 2014-03-14 | 2014-08-27 | 上海交通大学 | Magnetoelectric coriolis force detection sensor |
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| CN105162355A (en) * | 2015-09-11 | 2015-12-16 | 浙江科技学院 | Functional material compound action based non-contact driving device and method |
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| CN108747585A (en) | 2018-11-06 |
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