CN204413763U - Machine tool chief axis vibration detection device - Google Patents
Machine tool chief axis vibration detection device Download PDFInfo
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- CN204413763U CN204413763U CN201520036671.3U CN201520036671U CN204413763U CN 204413763 U CN204413763 U CN 204413763U CN 201520036671 U CN201520036671 U CN 201520036671U CN 204413763 U CN204413763 U CN 204413763U
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Abstract
The utility model discloses a kind of machine tool chief axis vibration detection device, involving vibrations sensor, signal receiver, A/D converter and data collecting card.Machine tool chief axis vibration detection device disclosed in the utility model, during work in-process heart spindle operation, vibration acceleration collection, record transmit main shaft rotate instruction value can be carried out to front-end of spindle bearing, contribute to regulating the speed of mainshaft, make the steady processing that main shaft carries out in reasonable vibration values, realize the adaptation function of main shaft, avoid main shaft to work in resonance region, reduce machine failure rate, the machine tool functional components such as available protecting main shaft, extend its service life, improve workpiece surface finish; The error of the mould and die accuracy that Digit Control Machine Tool causes because of spindle vibration in Mould Machining can be solved, better Mould Machining is provided to the running status of high-quality, while guarantee Mould Machining precision and fineness, significantly improve working (machining) efficiency, realize the high speed to mould and high fine finishining.
Description
Technical field
The utility model relates to a kind of checkout gear being applied to numerical control machining center, specifically a kind of machine tool chief axis vibration detection device.
Background technology
Lathe is the tap of equipment manufacture, is the basis of mechanical industry.Along with the develop rapidly of Chinese national economy, greatly have stimulated the quick growth of lathe and Die & Mould Market demand, old industrial bases in Northeast China and strategy to develop western regions bring the new opportunities of development to machine tool mould industry simultaneously.In the face of new international economic environment, China's machine tool mould industry will incorporate world's competition tide, meanwhile, China's heavy machine tool by high-grade numerical control with more meet the multi-functional of user's technological requirement and complete set technology development, and drives supporting for it functional part new breakthrough.The demand of market to high-grade, digitally controlled machine tools is undisputable fact, and key is that can domestic manufacturing enterprise develop and produce the high-end product meeting user's needs.We not only will accomplish the biggest in the world in Digit Control Machine Tool specification, accomplish the limit, more will improve constantly in machine tool accuracy, reliability and technical advance, make achievements.Can Machine Tool Development trend capture domestic market, is just to meet on the key equipment of user's needs.
In recent years, along with the adjustment of the industrial structure in industry, increasing processing object is tending towards miniaturized, height is refined.Particularly die industry, the requirement of user to product improves increasingly, and former mould product is after Digit Control Machine Tool processing, need through manual polishing, remove surface of the work burr and knife mark, if polishing makes mistakes, also need repair welding, and then be passed to lower link and carry out matched moulds.But now along with the lifting of Digit Control Machine Tool process technology, as long as after user processes mould product on lathe, manual polishing need not be carried out again, directly be passed to lower link and carry out matched moulds trial-production, eliminate intermediate steps, save a large amount of time and human cost, better ensure that machining accuracy and the fineness of die surface.Some electrical type enterprise, particularly do the enterprise of 3C series products, they process small-sized metal piece on lathe, are exactly directly product, and without the need to reprocessing, product is assembled subsequently, such as handset shell, Wristwatch case etc.Lathe is in the breakthrough of mold machining technology just, the technological process of product is reduced, develops towards high speed and super precisionization.For ensureing mould product moral quality and precision, the Digit Control Machine Tool as processing machine tool is had higher requirement.While guarantee machine tool structure is stable, the feature of Mould Machining must be studied, improve the processing characteristics of Digit Control Machine Tool from control aspect faster and betterly, meet the requirement of lathe to Mould Machining.
Vibration is the factor had the greatest impact to Mould Machining, and is one of the most scabrous problem.Because vibration produce a lot of because have, have the institutional vibration of lathe, add the resonance, the main shaft that cause man-hour and rotate vibration of the bearing that overload causes etc.The vibration acceleration of bearing is the important indicator weighing bearing mnanufacture level, and use instrumentation can quantitative measurment.Because bearing mnanufacture is imperfect, all bearings all can have certain measured value.Usual people wish that the vibration acceleration value of bearing is the smaller the better, particularly require the long-life equipment of low noise.According to bearing diameter size, different vibration acceleration levels can be specified, can with the expression such as Z1, Z2, Z3, Z4, Z1 vibration acceleration level higher than Z2, by that analogy.Such as: plain bearing requires to reach Z1 level, and Z4 level will be referred to as " quiet bearing ".The requirement if vibration acceleration level is above standard, illustrate that problem has appearred in bearing, internal cause may be: steel ball or and raceway circularity, percent ripple and roughness are defective, cleannes are poor, insufficient lubrication etc., external cause may be: Rig up error, pollution, supplemental lubrication are bad, load unbalance loading or overload, frame resonance etc.The vibration acceleration of bearing is the whether good overall target of the centering of the cooperation of quality and the axle directly reflecting that bearing runs and axle.
Wherein, main shaft bearing vibration is to one of unfavorable factor that Mould Machining has the greatest impact.If because main shaft rotate time due to assembling or machined parameters improper, bearing can be caused to beat, thus cause beating of cutter, cause surface of the work uneven.And the vibration of bearing is invisible, do not hear to only have and by the time process that rear discovery mold surface finish is defective just can be found yet, at this moment just cause damage.In addition, unmatched cutting parameter also can cause main shaft bearing to vibrate, because different workpieces material and processing curve, needs different cutting parameters, if the cutting parameter that use is blindly identical, also can affect the fineness on Mould Machining surface.Therefore, how effectively to detect and the vibration reducing main shaft bearing just seems very necessary.
Summary of the invention
Technical problem to be solved in the utility model is: for the deficiencies in the prior art; a kind of machine tool chief axis vibration detection device is provided; during work in-process heart spindle operation; vibration acceleration collection, record transmit main shaft rotate instruction value can be carried out to front-end of spindle bearing, contribute to regulating the speed of mainshaft, realize the adaptation function of main shaft; reduce machine failure rate; the machine tool functional components such as available protecting main shaft, extend its service life, improve surface of the work machining accuracy and fineness.
The utility model solves the problems of the technologies described above adopted technical scheme: machine tool chief axis vibration detection device, involving vibrations sensor, signal receiver, A/D converter and data collecting card; Described vibrating sensor is arranged on the outer ring of end bearing before machine tool chief axis, and the vibration acceleration of the radial direction occurred when being rotated by the front-end of spindle bearing detected is converted into current signal and transfers to described signal receiver by sensor cable; The current signal received amplifies and filtering by described signal receiver, and filtered signal is passed through signal receiver cable transmission to described A/D converter; Current signal is converted into digital quantity signal and by A/D converter cable transmission to described data collecting card by described A/D converter; Preset in described data collecting card and preserve standard vibration accekeration, the digital quantity signal received and described standard vibration accekeration are compared rear transmission main shaft rotate instruction value by described data collecting card, complete the detection of machine tool chief axis vibration.Front-end of spindle bearing near cutter, vibration frequency herein and vibration cutting frequency the most close, therefore vibrating sensor is arranged on the outer ring of end bearing before machine tool chief axis, the accuracy of machine tool chief axis vibration detection result can be guaranteed, reduce metrical error.
Described vibrating sensor is two, and vibrating sensor described in two symmetry is arranged on the outer ring of end bearing before described machine tool chief axis.Before machine tool chief axis end bearing outer ring on symmetrical installation two vibrating sensors are set, make machine tool chief axis vibration detection result more accurate.
Described vibrating sensor is the VSA001 type vibrating sensor of German IFM company production or the electric vortex type vibrating sensor of Bently Nevada company of U.S. production.The sensor can observe directly the axle or target surface displacement that various vibration, displacement, rotating speed and time (as phase place) measures, have multiple end diameter and thread size is available and combination, its measurement category is little of 200 microinch, greatly to 1 inch.
Described A/D converter is the VSE001 type A/D converter of German IFM company production or the AT104 type A/D converter of Japan's FA NUC company production.Analog signals is converted into digital quantity signal by above-mentioned A/D converter energy fast accurate ground.Analog signals can be the signal of telecommunication such as voltage, electric current, also can be the non-electrical signals such as pressure, temperature, humidity, displacement, sound.But before A/D conversion, the input signal being input to A/D converter first must convert voltage signal through various sensor to corresponding physical quantity.
Compared with prior art, the utility model has the advantage of: machine tool chief axis vibration detection device disclosed in the utility model, during work in-process heart spindle operation, vibration acceleration collection, record transmit main shaft rotate instruction value can be carried out to front-end of spindle bearing, contribute to regulating the speed of mainshaft, make the steady processing that main shaft carries out in reasonable vibration values, realize the adaptation function of main shaft, main shaft is avoided to work in resonance region, reduce machine failure rate, the machine tool functional components such as available protecting main shaft, extend its service life, improve workpiece surface finish; The error of the mould and die accuracy that Digit Control Machine Tool causes because of spindle vibration in Mould Machining can be solved, better Mould Machining is provided to the running status of high-quality, while guarantee Mould Machining precision and fineness, significantly improve working (machining) efficiency, realize the high speed to mould and high fine finishining.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of embodiment machine tool chief axis vibration detection device;
Fig. 2 is the installation design sketch of vibrating sensor in embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
Machine tool chief axis vibration detection device as shown in the figure, comprises two vibrating sensors 1, signal receiver 2, A/D converter 3 and data collecting card 4; Because cutter (not shown) is arranged on main shaft swivel joint 6, front-end of spindle bearing 5 is near cutter, vibration frequency herein and vibration cutting frequency the most close, therefore before two vibrating sensor 1 symmetries being threaded in machine tool chief axis end bearing 5 outer ring on, the vibration acceleration of radial direction occurred when the front-end of spindle bearing 5 detected rotates by two vibrating sensors 1 is converted into current signal and transfers to signal receiver 2 by sensor cable; The current signal received amplifies and filtering by signal receiver 2, and filtered signal is passed through signal receiver cable transmission to A/D converter 3; Current signal is converted into digital quantity signal and by A/D converter cable transmission to data collecting card 4 by A/D converter 3; Preset in data collecting card 4 and preserve standard vibration accekeration, the digital quantity signal received and standard vibration accekeration are compared rear transmission main shaft rotate instruction value by data collecting card 4, complete the detection that machine tool chief axis 7 vibrates.
In above embodiment, the VSA001 type vibrating sensor that vibrating sensor 1 adopts German IFM company to produce, the VSE001 type A/D converter that A/D converter 3 adopts German IFM company to produce.Signal receiver 2 and data collecting card 4 can select the electric elements of various commercially available conventional applicable model.
To process aluminum component on machine tool chief axis, adopt two angle of throat tools of Φ 6mm, the speed of mainshaft is set to respectively several grades listed by table 1, by above-mentioned machine tool chief axis vibration detection device, detect and the vibration acceleration value that data collecting card receives under recording main shaft no-load running situation, in table 1; Then respectively under same rotating speed, to run main shaft under cutting-in 0.1mm, feed rate F=5000mm/min condition, processing aluminum component, by above-mentioned machine tool chief axis vibration detection device, the vibration acceleration value that in record process, data collecting card receives, in table 2.
Vibration acceleration value during the lower main axis no-load running of table 1 different rotating speeds
| The speed of mainshaft, rpm | Vibration acceleration value, m/s 2 |
| 4000 | 0.000012 |
| 4500 | 0.000012 |
| 5000 | 0.000016 |
| 5500 | 0.000018 |
| 6000 | 0.000018 |
| 6500 | 0.000022 |
| 7000 | 0.000025 |
| 7500 | 0.000034 |
Vibration acceleration value during table 2 different rotating speeds lower main axis processing aluminum component
| The speed of mainshaft, rpm | Vibration acceleration value, m/s 2 |
| 4000 | 0.000018 |
| 4500 | 0.000019 |
| 5000 | 0.000022 |
| 5500 | 0.000027 |
| 6000 | 0.000027 |
| 6500 | 0.000032 |
| 7000 | 0.000035 |
| 7500 | 0.000038 |
Vibration acceleration value in table 2 during different rotating speeds lower main axis processing aluminum component is kept in data collecting card, as the standard vibration accekeration of other work pieces process follow-up.Such as, after machine tool chief axis is installed above-mentioned machine tool chief axis vibration detection device, when lathe the speed of mainshaft be 4500rpm, cutting-in 0.1mm, process steel part under feed rate F=5000mm/min condition time, after testing, its vibration acceleration is obviously large than the aluminum component under same operating mode, namely data collecting card transmits main shaft rotate instruction value, and main shaft will progressively reduce its rotating speed automatically, until the vibration acceleration value detected reaches the standard value 0.000019m/s preset
2time (error can be controlled in 5% in), the steady processing that main shaft will carry out with rotating speed now in reasonable vibration values, thus the adaptation function of main shaft is accomplished.
But for different cutter and different workpieces material; its spindle vibration frequency adding man-hour is different; therefore the data acquisition of different operating mode lower main axis vibration; very necessary for critical components such as protection main shaft bearings; to gather for the data under different operating mode; record is carried out to the process data of some cutters of routine, in data collecting card, preserves corresponding standard vibration accekeration respectively, effectively realize the application of main shaft adaptation function.
Claims (4)
1. machine tool chief axis vibration detection device, is characterized in that involving vibrations sensor, signal receiver, A/D converter and data collecting card; Described vibrating sensor is arranged on the outer ring of end bearing before machine tool chief axis, and the vibration acceleration of the radial direction occurred when being rotated by the front-end of spindle bearing detected is converted into current signal and transfers to described signal receiver by sensor cable; The current signal received amplifies and filtering by described signal receiver, and filtered signal is passed through signal receiver cable transmission to described A/D converter; Current signal is converted into digital quantity signal and by A/D converter cable transmission to described data collecting card by described A/D converter; Preset in described data collecting card and preserve standard vibration accekeration, the digital quantity signal received and described standard vibration accekeration are compared rear transmission main shaft rotate instruction value by described data collecting card, complete the detection of machine tool chief axis vibration.
2. machine tool chief axis vibration detection device according to claim 1, is characterized in that described vibrating sensor is two, and vibrating sensor described in two symmetry is arranged on the outer ring of end bearing before described machine tool chief axis.
3. machine tool chief axis vibration detection device according to claim 1 and 2, is characterized in that described vibrating sensor is the VSA001 type vibrating sensor of German IFM company production or the electric vortex type vibrating sensor of Bently Nevada company of U.S. production.
4. machine tool chief axis vibration detection device according to claim 1 and 2, is characterized in that described A/D converter is the VSE001 type A/D converter of German IFM company production or the AT104 type A/D converter of Japan's FA NUC company production.
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| CN201520036671.3U CN204413763U (en) | 2015-01-20 | 2015-01-20 | Machine tool chief axis vibration detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647624A (en) * | 2016-11-03 | 2017-05-10 | 沈阳机床股份有限公司 | Machine tool vibration monitoring system and method based on LabView and single chip microcomputer |
| CN110873633A (en) * | 2018-09-03 | 2020-03-10 | 上海铼钠克数控科技股份有限公司 | Spindle vibration detection method and system |
| CN111050998A (en) * | 2017-10-12 | 2020-04-21 | 西铁城时计株式会社 | Abnormality detection device and machine tool provided with abnormality detection device |
| CN113732821A (en) * | 2021-08-30 | 2021-12-03 | 长春汽车工业高等专科学校 | Vibration frequency detection device of intelligent cutting tool |
-
2015
- 2015-01-20 CN CN201520036671.3U patent/CN204413763U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647624A (en) * | 2016-11-03 | 2017-05-10 | 沈阳机床股份有限公司 | Machine tool vibration monitoring system and method based on LabView and single chip microcomputer |
| CN111050998A (en) * | 2017-10-12 | 2020-04-21 | 西铁城时计株式会社 | Abnormality detection device and machine tool provided with abnormality detection device |
| US11256236B2 (en) | 2017-10-12 | 2022-02-22 | Citizen Watch Co., Ltd. | Abnormality detection device and machine tool including abnormality detection device |
| CN110873633A (en) * | 2018-09-03 | 2020-03-10 | 上海铼钠克数控科技股份有限公司 | Spindle vibration detection method and system |
| CN113732821A (en) * | 2021-08-30 | 2021-12-03 | 长春汽车工业高等专科学校 | Vibration frequency detection device of intelligent cutting tool |
| CN113732821B (en) * | 2021-08-30 | 2022-10-21 | 长春汽车工业高等专科学校 | Vibration frequency detection device of intelligent cutting tool |
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