CN103630340A - Middle-convex elliptic lathe fixture test bed and test method thereof - Google Patents
Middle-convex elliptic lathe fixture test bed and test method thereof Download PDFInfo
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- CN103630340A CN103630340A CN201310244565.XA CN201310244565A CN103630340A CN 103630340 A CN103630340 A CN 103630340A CN 201310244565 A CN201310244565 A CN 201310244565A CN 103630340 A CN103630340 A CN 103630340A
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Abstract
Provided are a middle-convex elliptic lathe fixture test bed and a test method thereof. The test bed and the test method comprise three parts: a test device, assembly and a test method. The test device comprises a measurement and control computer, a USB data acquisition instrument, a test bench, a fixture, a belt, a motor and a hydraulic station. The fixture is fixed on the test bench, and after a test piston is installed, a hydraulic oil cylinder is started and a pull rod is tightened, and the piston is fixed and clamped. A temperature sensor probe contacts and is fixed to the outer rings of a front bearing and a rear bearing of a belt shaft, and an ICP vibration sensor is installed at a shell of the front bearing of the belt shaft. A spindle motor is started, and dynamic simulation test is carried out in measurement and control software according to the preset rotation speed. During the whole process of dynamic operation, a main interface of a test monitoring program displays the rotation speed of the belt shaft, the temperature values of the front and rear bearings, the vibration value of the front bearing, the axial tension force and the testing time parameters in real time, stores the acquired data in a database of the computer and analyzes the data.
Description
Technical field _
The present invention relates to a kind of diesel engine piston processing with becoming oval turning attachment testing table and test method technical field, relate in particular to lathe major diameter and become oval fixture test macro and test method.
Background technology
Along with the fast development of large ship industry, piston, as the heart of engine of boat and ship, is designed to middle-convex and varying ellipse shape by Large-power High-Speed engine piston conventionally at normal temperatures.Because the profile of middle-bulged varying ellipse piston is complicated, make it be processed into the crucial difficult problem that piston is manufactured, since the nineties in 20th century, Europe, beautiful, day various countries are development and application a new generation Piston Machining lathe competitively, adopt high-power belt axle to drive piston rotation, the high speed development paces of piston machine tool have been accelerated, as the clamp body that becomes one of oval lathe critical component, also there is series of problems, as temperature rise and the vibration problem of fixture belt shaft bearing, rotary oil cylinder running accuracy problem, and the integrity problem of pitch brace, for the clamp body designing is tested, urgent need is set up testing table and the whole fixture that Piston Machining becomes oval turning attachment and is detected online test method.
At present, patent about the oval turning attachment testing table of high-power change have not been reported at home, and as follows about becoming the Patents of oval lathe square fixture face and signal testing acquisition system aspect, for example CN2298083Y provides a kind of change oval processing unit (plant), belong to turning machine annex, adopt the roller on rocking knife carrier to be pressed on imitative ellipse cam, by imitative type contact, work.CN202622437U discloses the oval lathe finish fixture of a kind of change, and pulling assembly is arranged on lathe spindle and can strains piston, by lathe tailstock clamping piston, is applicable to turning high-power medium seed diesel engine piston.Patent about collection aspect has CN102012948A to announce a kind of real time data acquisition and stocking system and method based on USB, has and uses volume little, and the advantage such as be easy to carry.CN1584511A has announced a kind of large rotating machinery device intelligence and has gathered monitoring device, based on dsp processor, and the hardware device of eight passage high-speed data acquisition.CN102128697A has announced a kind of proving installation for high-speed electric main shaft, and filter amplification circuit is connected with data collecting plate card, and data collecting plate card is connected with industrial computer, and this device solves high-speed electric main shaft and tests difficult problem.CN201653537U discloses a kind of vibration acquisition analyser, and the vibration signal of the tested rotating machinery that reception vibration transducer transmits, according to exporting with this channel attached vibration transducer type and sample requirement gating one tunnel vibration conditioned signal.
Several patents above can find out, the oval lathe major part of current high-power change is external import, the domestic oval turning attachment of low power change of can producing at present, and the installation way of fixture is also not quite similar, and conventionally usings tailstock as support, and structure is comparatively complicated.Test acquisition system be take PCI or USB capture card as main, acquisition channel is few, synchronous parallel gathers less, mostly adopt poll collection, for vibration acquisition aspect, conventionally adopt fore-lying device, the shortcomings such as the test acquisition system that can directly connect in vibration transducer is less, causes wiring too much, and system is huge.Not yet find at present the relevant report about major diameter variable ellipse piston fixture test platform, about becoming the fixture detection test method of one of oval lathe critical component, just more lack.
This patent variable ellipse piston fixture experiment table and test method adopt 24bits A/D high-precision multi-path Acquisition Instrument, integrated temperature and ICP vibration transducer can be directly connected in Acquisition Instrument, omit pre-amplification circuit, be conducive to accuracy and the convenience of test data.Whole experiment table consists of cast iron, and adopts axle hung type clamping, can bear larger weight and rotatory inertia, has guaranteed the reliability of fixture and the stability that variable ellipse piston adds man-hour, has reduced the vibration that the High Rotation Speed due to belt shaft brings.At present, country there is no test method for the oval fixture of high-power change, Performance Detection field for fixture belongs to blank, can only carry out real-world operation in industry spot, by service data, fixture is analyzed, seriously affected the design of fixture, improve, particularly argosy is all very large by the Installation and Debugging expense of the oval fixture of change, the reliability and stability of fixture directly affect the safe handling of machining tool, this patent test method is convenient to pinpoint the problems early, improve design, reduce adjustment and installation expense, guaranteed the qualification rate that fixture dispatches from the factory, ensured the safe handling of lathe.
Summary of the invention
The object of this invention is to provide the oval turning attachment experiment table of a kind of applicable change and test method.For achieving the above object, patent of the present invention is achieved by the following technical programs:
The oval turning attachment experiment table of described change, mainly consists of Measurement &control computer, usb data Acquisition Instrument, acquisition software, test-bed, fixture, heavy-duty motor, temperature sensor, vibration transducer, Hydraulic Station.High-power piston fixture mainly consists of hydraulic jack, belt main shaft, pull bar terminal pad, clamp body, slide block, draw ring, pin-and-hole pull bar; Because large-power marine diesel engines Piston Machining is larger with becoming the related product cylinder diameter of oval lathe, weight is heavier, only single clamp weight is 680 kilograms, add piston blank quality, need experimental stand stable support quality to do High Rotation Speed at the piston of 800 kilograms of left and right, the self-centering of necessary warranty test stand, solid and reliable, require has certain adjustment leeway, position simultaneously, so that the installation of temperature and vibration transducer.
Described variable ellipse piston fixture experimental stand adopts axle hung type clamping, by main shaft holder, the oval fixture of change is fixed on experimental stand, and whole experimental stand consists of cast iron, experiment table bottom adopts the design of muscle board wing type, the every face of experiment table has the 2 batten wings, the totally 8 batten wings, have reduced the vibration that the High Rotation Speed due to fixture belt shaft brings, and have guaranteed the reliability and stability of fixture in detecting.
Described variable ellipse piston fixture experiment table USB formula Acquisition Instrument adopts synchronous 24 8 Channel Synchronous Parallel Designs, the gain error of each passage and zero drift can be eliminated by the fine setting of DAQ controller independently, and this Acquisition Instrument can dock in Central China numerical control system, there is higher functional reliability and stability and practicality.
Described variable ellipse piston fixture experiment table adopts 1 ICP formula vibration transducer, sensitivity is 100mV/g, adopt 3 integrated type temperature sensors to survey, temperature-measuring range is-50 ℃-300 ℃, two kinds of sensors all adopt integrated chip, saved old-fashioned prime amplifier, can directly be connected with Acquisition Instrument, for whole fixture test macro has been saved space.
Described variable ellipse piston fixture test experimental bed and test method realize by following steps, first by foot bolt, test-bed is fixed on level ground, adjust main shaft holder position, by coupling bolt, be fixed on test-bed column, fixture belt shaft outward flange is alignd with main shaft holder, rapidly seize cover is fixed on main shaft holder by coupling bolt.By pull bar spanner bayonet socket sectional fixture pull bar and hydraulic cylinder, adjust belt pulley and motor to same level height, belt is installed, according to the diameter of machining piston, select clamp body, after mounting clamp is concrete, tighten pull bar screw, the piston outward flange that placement will be processed aligns with the outward flange of clamp body, and pin-and-hole pull bar is installed, primer fluid cylinder pressure is strained pull bar, completes the clamping of piston; Integrated temperature sensor is threaded and is directly measured front bearing outer ring temperature, rear bearing outer ring temperature with front bearing, rear bearing and the temperature probe of main shaft by M12, and ICP vibration transducer adopts screw thread to install and is positioned over belt shaft front bearing shell place.Complete the clamping of piston, startup Measurement &control computer and signal sampler after piston clamping completes, start observing and controlling acquisition software, start spindle motor, in TT&C software, according to the rotating speed setting in advance, carry out dynamic analog test, in whole dynamic operation process, the test main interface of watchdog routine shows the rotating speed of belt shaft in real time, the temperature value of front and back bearings, the vibration values of front bearing, axial tightening power, test period parameter, and above-mentioned parameter is kept in the database of computing machine, in process of the test as occur abnormal conditions, by computer monitoring program, send and report to the police and auto stop, after off-test, shut down, by hydraulic jack, loosen pull bar, lay down replaceable piston after piston draw ring, carry out lower battery of tests.
Owing to adopting technical scheme as mentioned above, the present invention compared with prior art tool has the following advantages:
1, this becomes oval fixture test experimental bed, the eight batten wings are arranged at bottom, can bear larger weight and rotatory inertia, improved experiment table stability, when whole experiment table imitation lathe base adopts cast iron to be formed in main shaft rotation, can reduce the vibration that rotation brings, more approach lathe truth.
2, integrated 8 100Ksps24bits A/D converters on signal sampler, independently high speed and precision operational amplifier and accurate attenuation filter network form programme-controlled gain passage with 8, on plate with 32K X16BYTES FIFO, the maximum sampling depth of passage is unrestricted, can realize the continuous huge storage capacity recording function of high-precision signal, guarantee high precision and the stability of collection signal, and this Acquisition Instrument can dock in Central China numerical control system, there is good development prospect and realistic meaning.
3, this becomes oval fixture test experimental bed use integral type temperature sensor and ICP vibration transducer, sensor can directly be connected with Acquisition Instrument, won more installing space, the intermediate links such as pre-amplification circuit have been saved, the less interference of signal, has guaranteed the degree of accuracy of collection signal.
4, this becomes oval fixture test experimental bed observing and controlling analysis software, control panel is the Chinese Graphic interface of virtual instrument style, integrated real-time monitoring, automatic alarm stops, data analysis function, operation support XP/WIN7 operating system, supports hyperchannel file layout, experimental waveform packing storage, guarantees data integrity.
5, the parameters that test method of the present invention is tested by Computer Automatic Monitor record, by detection of dynamic, temperature detection, data analysis, for the design of high-power piston fixture is laid a good foundation.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram that the present invention becomes oval fixture testing table; In figure 1, Measurement &control computer 2, usb data Acquisition Instrument 3, test-bed 4, fixture 5, belt 6, motor 7, Hydraulic Station.
Fig. 2 is the whole three-dimensional plot axonometric drawing of test-bed of the present invention and fixture; In figure 301, the stand plate wing 302, digital temperature sensor 303, ICP vibration transducer 401, hydraulic jack 5, belt 6, motor.
Fig. 3 is the three-dimensional axonometric drawing of test-bed of the present invention; In figure 301, the stand plate wing 302, digital temperature sensor 303, ICP vibration transducer 304, seize cover 305, seize cover attachment screw 306, main shaft holder attachment screw 307 stand foot bolt.
Fig. 4 is the three-dimensional axonometric drawing of fixture of the present invention, in figure 401, hydraulic jack 402, main shaft belt shaft 403 main shaft thermometer hole 404 belt main shafts 405, piston draw ring 406, clamp body
Fig. 5 is fixture sectional view of the present invention, in figure 401, hydraulic jack 402, main shaft belt shaft 404 belt main shafts 405, piston draw ring 406, clamp body 407, pin-and-hole pull bar 408, piston 409, pull bar spanner bayonet socket 410, pull bar 411, attachment screw
Embodiment
In order to make patent examiner and the public can more be expressly understood technical spirit of the present invention and beneficial effect, applicant elaborates the mode with embodiment below by reference to the accompanying drawings, but to the description of embodiment, be not all the restriction to the present invention program, any according to the present invention design, done only for pro forma but not substantial equivalence changes, all should be considered as technical scheme category of the present invention.
Please refer to accompanying drawing 1-5, by foot bolt 307, test-bed 3 is fixed on level ground, adjust main shaft holder 308 positions, by coupling bolt 306, be fixed on test-bed column 309, fixture belt shaft 404 outward flanges are alignd with main shaft holder 308, rapidly seize cover 304 is overlapped to coupling bolt 305 by seize and be fixed on main shaft holder 308.By pull bar spanner bayonet socket 409 sectional fixture pull bars 410 and hydraulic cylinder 401, adjust belt pulley 402 and arrive same level height with motor 6, belt 5 is installed, according to the diameter of machining piston 408, selecting clamp body 406 materials is ZG310-570, after mounting clamp concrete 406, tighten pull bar screw 411, piston 408 outward flanges that placement will be processed align with the outward flange of clamp body 406, pin-and-hole pull bar 407 is installed, pin-and-hole pull bar 407 is weldment, the main part of pin-and-hole pull bar 407 is Cold-rolled fine seamless steel tube, the main part two ends of pin-and-hole pull bar are furnished with support column to strengthen its intensity, primer fluid compressing cylinder 401 is strained pull bars 410, completes the clamping of piston, integrated temperature sensor 302 is threaded and is directly measured front bearing outer ring temperature, rear bearing outer ring temperature with front bearing, rear bearing and the temperature probe of belt shaft 404 by M12, and ICP vibration transducer 303 adopts screw thread to install and is positioned over belt shaft 404 front bearing shell places, complete the clamping of piston, startup Measurement &control computer 1 and signal sampler 2 after piston clamping completes, start observing and controlling acquisition software, start spindle motor 6, in TT&C software, according to the rotating speed setting in advance, carry out dynamic analog test, in whole dynamic operation process, the test main interface of watchdog routine shows the rotating speed of belt shaft 404 in real time, the temperature value of front and back bearings, the vibration values of front bearing, axial tightening power, test period parameter, and above-mentioned parameter is kept in the database of computing machine, in process of the test as occur abnormal conditions, by computer monitoring program, send and report to the police and auto stop, after off-test, shut down, by hydraulic jack 401, loosen pull bar 410, lay down the rear replaceable piston 408 of piston draw ring 407, carry out lower battery of tests.
The belt shaft rotating speed that fixture testing table of the present invention uses can change within the scope of 100-2000r/min, and has automatic checkout system, can detect in real time vibration and the temperature of belt shaft, the variation of vibration values and temperature value in analysis Piston Machining.
The fixture range of work of the present invention is wide, not only can process the enlarged bore piston that diameter is Φ 550mm, and can use a machine tool to process different types of piston, saved enterprise cost, filled up the blank of domestic this technology, to greatly improve the hierarchy of skill of the high-power domestic piston machine tool of China, there are very high social value and wide market outlook.
Claims (4)
1. middle-convex and varying ellipse turning attachment experiment table and a test method, is characterized in that: this testing table and test method comprise test unit, assembling and test method three partial contents;
I, test unit
Test unit is by Measurement &control computer (1), usb data Acquisition Instrument (2), test-bed (3), fixture (4), belt (5), motor (6), Hydraulic Station (7);
Described test-bed (3) includes the stand plate wing (301), digital temperature sensor (302), ICP vibration transducer (303), seize cover (304), seize cover attachment screw (305), main shaft is fixedly connected with screw (306), stand foot bolt (307);
Described fixture (4) includes hydraulic jack (401), spindle pulley (402), main shaft thermometer hole (403), belt main shaft (404), piston draw ring (405), clamp body (406), pin-and-hole pull bar (407), piston (408), pull bar spanner bayonet socket (409), pull bar (410), attachment screw (411);
II, assembling
By foot bolt (307), test-bed (3) is fixed on level ground, adjust main shaft holder (308) position, by coupling bolt (306), be fixed on (309) on test-bed column, fixture belt shaft (404) outward flange is alignd with main shaft holder (308), rapidly seize cover (304) is overlapped to coupling bolt (305) by seize and be fixed on main shaft holder (308), by pull bar spanner bayonet socket (409) sectional fixture pull bar (410) and hydraulic cylinder (401), adjust belt pulley (402) and arrive same level height with motor (6), belt (5) is installed, according to the diameter of machining piston (408), selecting clamp body (406) material is ZG310-570, mounting clamp is tightened pull bar screw (411) after concrete (406), the piston that placement will be processed (408) outward flange aligns with the outward flange of clamp body (406), pin-and-hole pull bar (407) is installed, pin-and-hole pull bar (407) is weldment, the main part of pin-and-hole pull bar (407) is Cold-rolled fine seamless steel tube, the main part two ends of pin-and-hole pull bar are furnished with support column to strengthen its intensity, primer fluid compressing cylinder (401) is strained pull bar (410), completes the clamping of piston, integrated temperature sensor (302) is threaded and is directly measured front bearing outer ring temperature, rear bearing outer ring temperature with front bearing, rear bearing and the temperature probe of belt shaft (404) by M12, and ICP vibration transducer (303) adopts screw thread to install and is positioned over belt shaft (404) front bearing shell place, complete the clamping of piston, piston clamping completes,
III, test method
Start Measurement &control computer (1) and signal sampler (2), start observing and controlling acquisition software, start spindle motor (6), in TT&C software, according to the rotating speed setting in advance, carry out dynamic analog test, in whole dynamic operation process, the test main interface of watchdog routine shows the rotating speed of belt shaft (404) in real time, the temperature value of front and back bearings, the vibration values of front bearing, axial tightening power, test period parameter, and above-mentioned parameter is kept in the database of computing machine, in process of the test as occur following abnormal conditions, as fixture belt shaft bearing under different rotating speeds temperature lift-off value over 25 ℃, bearing vibration value surpasses 6g, when axial tightening hydraulic jack tightening force is less than 2000N, by computer monitoring program, send and report to the police and auto stop, after off-test, shut down, by axial hydraulic oil cylinder (401), loosen pull bar (410), lay down after piston draw ring (407), change piston (408), and data and the image of different periods of above-mentioned parameter are carried out to computer data processing, finally make the evaluation conclusion of fixture under high speed dynamic analog test.
2. a kind of middle-convex and varying ellipse turning attachment experiment table as claimed in claim 1 and test method, it is characterized in that: the eight batten wings (301) are arranged at test-bed (3) bottom, can bear larger weight and rotatory inertia, improved experiment table stability, when whole experimental stand imitation lathe base adopts cast iron to be formed in main shaft rotation, can reduce the vibration that rotation brings, more approach lathe truth.
3. a kind of middle-convex and varying ellipse turning attachment experiment table as claimed in claim 1 and test method, it is characterized in that: signal sampler (2) is integrated 8 100Ksps24bits A/D converters, independently high speed and precision operational amplifier and accurate attenuation filter network form programme-controlled gain passage with 8, on plate with 32K X16BYTES FIFO, the maximum sampling depth of passage is unrestricted, can realize the continuous huge storage capacity recording function of high-precision signal, guarantee high precision and the stability of collection signal, and this Acquisition Instrument can carry out data docking in Central China numerical control system, use integral type temperature sensor (302) and ICP vibration transducer (303), sensor can directly be connected with Acquisition Instrument (2), won more installing space, the intermediate links such as pre-amplification circuit have been saved, the less interference of signal, guaranteed the degree of accuracy of collection signal.
4. a kind of middle-convex and varying ellipse turning attachment experiment table as claimed in claim 1 and test method, it is characterized in that: observing and controlling analysis software, control panel is the Chinese Graphic interface of virtual instrument style, the parameters that automatic monitoring record are tested in real time, there is detection of dynamic, temperature detection, data analysis function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310244565.XA CN103630340B (en) | 2013-06-09 | 2013-06-09 | A kind of test method of middle-convex and varying ellipse turning attachment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310244565.XA CN103630340B (en) | 2013-06-09 | 2013-06-09 | A kind of test method of middle-convex and varying ellipse turning attachment |
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| Publication Number | Publication Date |
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| CN103630340A true CN103630340A (en) | 2014-03-12 |
| CN103630340B CN103630340B (en) | 2016-04-27 |
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| CN201310244565.XA Expired - Fee Related CN103630340B (en) | 2013-06-09 | 2013-06-09 | A kind of test method of middle-convex and varying ellipse turning attachment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132572A (en) * | 2017-06-14 | 2017-09-05 | 四川大学 | The test platform tested for rock masses fracturing microseism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL160595B2 (en) * | 1989-11-28 | 1993-03-31 | Fatique testing apparatus | |
| WO2003062769A1 (en) * | 2002-01-18 | 2003-07-31 | Spm Instrument Ab | An analysis system for analysing the condition of a machine |
| CN101625284A (en) * | 2009-07-30 | 2010-01-13 | 燕山大学 | Tribological performance evaluation testing machine of overloading impact of bearing |
| CN102053015A (en) * | 2009-10-30 | 2011-05-11 | 中国石油化工股份有限公司 | Tester for thrust bearing |
| CN202622437U (en) * | 2012-05-25 | 2012-12-26 | 广州柴油机厂股份有限公司 | Finish turning fixture for external convex and varying ellipse of piston of diesel |
| CN102962706A (en) * | 2012-11-16 | 2013-03-13 | 安阳鑫盛机床股份有限公司 | Oval turning lathe fixture for use in piston processing of marine diesel engine |
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2013
- 2013-06-09 CN CN201310244565.XA patent/CN103630340B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL160595B2 (en) * | 1989-11-28 | 1993-03-31 | Fatique testing apparatus | |
| WO2003062769A1 (en) * | 2002-01-18 | 2003-07-31 | Spm Instrument Ab | An analysis system for analysing the condition of a machine |
| CN101625284A (en) * | 2009-07-30 | 2010-01-13 | 燕山大学 | Tribological performance evaluation testing machine of overloading impact of bearing |
| CN102053015A (en) * | 2009-10-30 | 2011-05-11 | 中国石油化工股份有限公司 | Tester for thrust bearing |
| CN202622437U (en) * | 2012-05-25 | 2012-12-26 | 广州柴油机厂股份有限公司 | Finish turning fixture for external convex and varying ellipse of piston of diesel |
| CN102962706A (en) * | 2012-11-16 | 2013-03-13 | 安阳鑫盛机床股份有限公司 | Oval turning lathe fixture for use in piston processing of marine diesel engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132572A (en) * | 2017-06-14 | 2017-09-05 | 四川大学 | The test platform tested for rock masses fracturing microseism |
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