CN102778345A - Test device for simulating loading of main shaft of working condition - Google Patents
Test device for simulating loading of main shaft of working condition Download PDFInfo
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- CN102778345A CN102778345A CN2012100299283A CN201210029928A CN102778345A CN 102778345 A CN102778345 A CN 102778345A CN 2012100299283 A CN2012100299283 A CN 2012100299283A CN 201210029928 A CN201210029928 A CN 201210029928A CN 102778345 A CN102778345 A CN 102778345A
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Abstract
The invention relates to a metal-cut numerically-controlled machine tool in the technical field of machinery, in particular to a test device for simulating the loading of a main shaft of a working condition and the dynamic performance of the main shaft of a machine tool. The device comprises an axial eddy current sensor and two radial eddy current sensors, wherein the radial eddy current sensors are arranged on a shaft shoulder of the main shaft through a sensor bracket; the angle formed between the radial eddy current sensors is 90 degrees; a servo motor is connected with a belt pulley on the front end part of a main shaft unit through a belt; and radial and axial loading measuring heads are fixedly arranged on a test platform through a radial or axial loading nut base and a radial or axial guide base. The metal-cut numerically-controlled machine tool has the advantages that various operation load conditions, such as milling, drilling, expanding and boring, of the main shaft can be simulated, a dynamic rotary precision test is performed through the combination of the eddy current sensors which are vertical to each other in the radial simulation working condition, the axial simulation working condition, or the radial and axial mixed simulation working condition, the reliability of the working condition of the numerically-controlled machine tool can be estimated, and the test device has the advantages of high dynamic performance test precision and low measurement cost.
Description
Technical field
The gold that the present invention relates in the field of mechanical technique is cut numerically-controlled machine, and the main shaft that specifically relates to a kind of simulated condition loads the machine tool chief axis dynamic performance and testing.
Background technology
Main shaft is the chief component of lathe, and the quality of main shaft dynamic property is the principal element that influences the serviceability of lathe, and especially crudy and the production efficiency to workpiece has direct influence.Main shaft load test under the simulated condition is a kind of important means of reflection spindle unit performance index, but and analog main shaft mill, loading condition under the various ruuning situations such as brill, expansion, boring.Through single radially, axially and radially, the axial load test under the hybrid analog-digital simulation operating mode, for the weak link of finding main shaft dynamic property aspect in the manufacturing and designing of present numerically-controlled machine, improve the performance of spindle unit, important basis is provided.Therefore the test of main shaft dynamic property is very important, yet lathe producer also is in the starting stage for the research of this respect, along with numerically-controlled machine at a high speed, high-precision, compoundization direction develops, test of machine tool spindles simulation loading and device are indispensable.
Summary of the invention
The present invention be directed to the problem of above-mentioned existence, a kind of main shaft loading test device that is used for main shaft of numerical control machine tool dynamic performance testing usefulness, simulated condition is provided.
The main shaft loading test device of a kind of simulated condition of the present invention is achieved through following technical proposals: a kind of main shaft loading test device of simulated condition comprise main axle unit, belt, servomotor, radial force guide holder, radial loaded screw rod, radial loaded handwheel, radial loaded nut seat, radial force sensor, radial loaded gauge head, axially load handwheel, axially load screw rod, axially load nut seat, axial force guide holder, axial force transducer, axially load gauge head, load test handle of a knife, axial radially current vortex sensor, main axle unit bearing, belt pulley, loading cover, rolling bearing, force application rod of current vortex sensor, sensor stand, 2; Data transmission and disposal system; Described axial current vortex sensor and be arranged on be mutually 90 ° on the shaft shoulder of main shaft 2 radially current vortex sensors through sensor stand; And with the coupling of data transmission and disposal system; Servomotor is fixedly installed on the test platform of simulated condition, and servomotor is connected with the belt pulley of main axle unit rearward end through belt; Main axle unit is fixed on the test platform through the main axle unit bearing, and the test handle of a knife is arranged on the main axle unit leading section; Described radial loaded gauge head is arranged in the hole at test force application rod center; The radial force sensor is arranged between inboard shoulder of radial loaded gauge head and the test force application rod end; And with the coupling of data transmission and disposal system; Test force application rod and radial force guide holder are through key connecting, and the radial loaded screw rod is threaded with the radial loaded nut seat, and the radial loaded handwheel is arranged on the outer end of radial loaded screw rod; Described radial loaded screw rod is fixed on the test platform through radial loaded nut seat and radial force guide holder with the radial loaded gauge head and tests the vertical side of handle of a knife with loading, and makes radial loaded gauge head and radial loaded screw coaxial; Described axial loading gauge head is arranged in the hole at test force application rod center; Axial force transducer is arranged between inboard shoulder of axial loading gauge head and the test force application rod end; And with the coupling of data transmission and disposal system; Test force application rod and axial force guide holder axially load screw rod and are threaded with axially loading nut seat through key connecting, axially load the outer end that handwheel is arranged on axial loading screw rod; Described axial loading screw rod and axial loading gauge head are fixed on the test platform through axial loading nut seat and axial force guide holder tests the handle of a knife end with loading, and it is coaxial to make axial loading gauge head and axial loading screw rod and loading test handle of a knife.
The present invention has following beneficial effect compared with prior art: the present invention be to main shaft carry out single radially, axially and radially, axial loading and sound rigidity and the dynamic rotation accuracy test under the hybrid analog-digital simulation operating mode; Main axle unit is installed on the test bench; Through the driven by motor main axis rotation; The test handle of a knife connects through spindle taper hole with main shaft and strains; The test handle of a knife with load overcoat and isolate through rolling bearing, charger can radially, axially manually carry out the loading of different big or small load what load overcoat, radially, axially loading force big I through radially, the transmission of axle pressure sensing data and disposal system confirm.Carry out radially simultaneously, axial displacement monitoring, and be implemented in the dynamic stiffness detection the simulation loading state under.Under situation about not loading, main shaft is rotated, under different rotating speeds through axially carrying out the measurement of axial displacement under the main shaft different rotating speeds, dynamic rotation precision with 2 current vortex sensors that radially are mutually 90 °.All devices pass through screw retention on test platform.
The present invention works in the following manner; On the shaft shoulder of main shaft, settle be mutually 90 ° 2 radially current vortex sensors and axial current vortex sensor; On the test platform of simulated condition; The test handle of a knife rotation that servomotor drives main axle unit and is attached thereto; Through the radial loaded handwheel or axially load handwheel rotating band radius vector to loading screw rod or axially loading screw rod, imposed load passes in the radial loaded gauge head through force application rod or axially loads gauge head, and magnitude of load can be through radial force sensor or axial force transducer output; And through data transmission and disposal system demonstration; Load gauge head again with load respectively or simultaneously from axial, radial loaded in the test handle of a knife, the test handle of a knife is owing to adopt 7008 rolling bearing outer shrouds and load the structure that cover matches and can the high speed rotating of main shaft be converted into static the loading, apply under the different rotating speed different loads can through 2 radially current vortex sensors monitor with axial current vortex sensor; And with data transmission and processing, record axially, radial displacement, record the dynamic rate of main shaft.Or under situation about not loading, main axle unit rotates, through axial current vortex sensor and 2 radially current vortex sensor with data transmission to the processing system, can record the dynamic rotation precision of main shaft.
Technological merit of the present invention be can analog main shaft mill, loading condition under the various ruuning situations such as brill, expansion, boring; Through single radially, axially and radially, axial load test and sound rigidity and the dynamic rotation accuracy test under the hybrid analog-digital simulation operating mode; Can evaluate the reliability of numerically-controlled machine; It is high to have the dynamic performance testing precision, measures the low advantage of cost.
Description of drawings
The main shaft loading test device of a kind of simulated condition of the present invention has following accompanying drawing:
Fig. 1 is the main shaft loading test device structural representation of a kind of simulated condition of the present invention;
Fig. 2 loads test Knife handle structure synoptic diagram for the main shaft loading test device of a kind of simulated condition of the present invention;
Fig. 3 is the main shaft loading test device charger structural representation of a kind of simulated condition of the present invention.
Fig. 4 is the main shaft loading test device data transmission and the disposal system structural representation of a kind of simulated condition of the present invention.
Wherein: 1, main axle unit; 2, belt; 3, servomotor; 4, guide holder; 5, radial loaded screw rod; 6, handwheel; 7, radial loaded nut seat; 8, radial force sensor; 9, radial loaded gauge head; 10, handwheel; 11, axially load screw rod; 12, axially load nut seat; 13, guide holder; 14, axial force transducer; 15, axially load gauge head; 16, load the test handle of a knife; 17, axial current vortex sensor; 18, sensor stand; 19, current vortex sensor I radially; 20, current vortex sensor II radially; 21, main axle unit bearing; 22, belt pulley; 23, load cover; 24,7008 rolling bearings; 25, force application rod; 26, extend cable; 27, power supply; 28, front device; 29, data display equipment; 30, analog-digital commutator.
Embodiment
Below in conjunction with accompanying drawing and embodiment the main shaft loading test device technical scheme of a kind of simulated condition of the present invention is further described.
Like Fig. 1-shown in Figure 4; A kind of main shaft loading test device of simulated condition comprise main axle unit 1, belt 2, servomotor 3, radial force guide holder 4, radial loaded screw rod 5, radial loaded handwheel 6, radial loaded nut seat 7, radial force sensor 8, radial loaded gauge head 9, axially load handwheel 10, axially load screw rod 11, axially load nut seat 12, axial force guide holder 13, axial force transducer 14, axially load gauge head 15, load test handle of a knife 16, axially current vortex sensor 17, sensor stand 18, radially current vortex sensor I 19, radially current vortex sensor II 20, main axle unit bearing 21, belt pulley 22, load cover 23, rolling bearing 24, force application rod 25, extend cable 26, power supply 27, front device 28, data display equipment 29, analog-digital commutator 30; Described axial current vortex sensor 17 and 2 radially current vortex sensor 19,20 be arranged on through sensor stand 18 on the shaft shoulder of main shaft and be mutually 90 °; And link with data transmission and disposal system; Servomotor 3 is arranged on the test platform of simulated condition, and servomotor 3 is connected with the belt pulley 22 of main axle unit 1 rearward end through belt 2; Main axle unit 1 is fixed on the test platform through main axle unit bearing 21, and test handle of a knife 16 is arranged on main axle unit 1 rearward end; Described radial loaded gauge head 9 is arranged in the hole at test force application rod 25 centers; Radial force sensor 8 is provided with between radial loaded gauge head 9 inboard shoulders and test force application rod 25 ends; Test force application rod 25 and radial force guide holder 4 are connected through key; Radial loaded screw rod 5 is threaded with radial loaded nut seat 7; Radial loaded handwheel 6 is arranged on the outer end of radial loaded screw rod 5, and described radial loaded screw rod 5 is fixed on the test platform through radial loaded nut seat 7 and radial force guide holder 4 with radial loaded gauge head 9 and tests handle of a knife 16 vertical sides and make radial loaded gauge head 9 coaxial with radial loaded screw rod 5 with loading; Described axial loading gauge head 17 is arranged in the hole at test force application rod 25 centers; Axial force transducer 14 is provided with between axial loading gauge head 17 inboard shoulders and test force application rod 25 ends; Test force application rod 25 and axial force guide holder 13 are connected through key; Axially loading screw rod 11 is threaded with the axial nut seat 12 that loads; Axially load the outer end that handwheel 10 is arranged on axial loading screw rod 11, described axial loading screw rod 11 with axially load gauge head 15 and be fixed on the test platform and load test handle of a knife 16 ends and make axial loading gauge head 15 and axially load screw rod 11 and load that to test handle of a knife coaxial through axial loading nut seat 12 and axial force guide holder 13.
Described radial force guide holder 4 is provided with force application rod 25 with axial force guide holder 13.
Described data transmission and disposal system comprise axial force transducer 14; Radial force sensor 8; Current vortex sensor 17,19,20; Extend cable 26, front device 28, power supply 27 and data display equipment 29, analog-digital commutator 30, described current vortex sensor 17,19,20 is connected with front device 28 input ends through extending cable 26; Described power supply 27 is connected with front device 28, axial force transducer 14 and radial force sensor 8 power interfaces, and described data display equipment 29 is connected with front device 28, analog-digital commutator 30 output interfaces.
Embodiment 1.
When the present invention main shaft is carried out single radially, axially and radially, axial loading and sound rigidity and the dynamic rotation accuracy test under the hybrid analog-digital simulation operating mode; Main axle unit 1 is installed on the test bench; Drive main axis rotation through servomotor 3; Test handle of a knife 16 connects through spindle taper hole with main shaft 1 and strain, test handle of a knife 16 with load overcoat 23 and pass through rolling bearing 24 isolation, charger can loading overcoat 23 radially, axially manually carry out the loading of different big or small load; Radially, axially the big I of loading force, outputs to data display equipment 29 and shows the loading forces size through analog-digital commutator 30 through radial force sensor 8 or axial force transducer 14.Current vortex sensor 17,19,20 carries out radially, axial displacement monitoring, and the dynamic stiffness that can be implemented in the simulation loading state under detects, output to data display equipment 29 demonstrations radially, axial displacement and dynamic stiffness.Under situation about not loading; Main shaft is rotated under different rotating speeds; Through shaft position sensor 17; 2 are mutually radially that 90 ° current vortex sensors 19,20 can carry out dynamic rotation accuracy detection under the main shaft different rotating speeds, axial displacement detects, and output to data display equipment 29 and carry out data or graphic presentation.All devices pass through screw retention on test platform.
The present invention works in the following manner, when respectively to main shaft axially or during the radial loaded test: settle radially current vortex sensor 19,20 of the axial current vortex sensor 17 that is mutually 90 ° and 2 on the shaft shoulder at main shaft.On the test platform of simulated condition; Test handle of a knife 16 rotations that servomotor 3 drives 1 yuan of main shaft list and is attached thereto; Through radial loaded handwheel 6 or axially load handwheel 10 rotation radial loaded screw rods 5 or axially load screw rod 11; Imposed load passes in radial loaded gauge head 9 through force application rod 25 or axially loads gauge head 15, and magnitude of load can output to data display equipment 29 and show the loading forces size through radial force sensor 8 or axial force transducer 14 through analog-digital commutator 30.Radial loaded gauge head 9 or axially load gauge head 15 again with load respectively from axially, radially or with load from axially, radially load on simultaneously the test handle of a knife 16; Test handle of a knife 16 is because the structure that adopts rolling bearing 26 outer shrouds to match with loading cover 23 can be converted into the high speed rotating of main shaft static the loading; Applying different loads under the different rotating speed can be through axial current vortex sensor 17 and 2 radially current vortex sensor 19,20 detection; Output to that data display equipment 29 shows radially, axial displacement and dynamic stiffness, 2 radially the radial displacement data that output on the data display equipment 29 of current vortex sensor 19,20 get the maximum.
In the time need axially and radially carrying out the dynamic performance testing of main shaft simultaneously: on the test platform in simulated condition to main shaft; Test handle of a knife 16 rotations that servomotor 3 drives main axle unit and is attached thereto; Reach axially loading screw rod 11 through radial loaded handwheel 6 and the axial handwheel 10 rotation radial loaded screw rods 5 that load; Imposed load passes in radial loaded gauge head 9, axially loads gauge head 15 through force application rod 25; Magnitude of load can output to data display equipment 29 and show the loading forces size through radial force sensor 8 and axial force transducer 14 through analog-digital commutator 30.Through radial loaded gauge head 9, axially load gauge head 15; Load is loaded on test handle of a knife 16 simultaneously from axial-radial; Test handle of a knife 16 is because the structure that adopts rolling bearing 24 outer shrouds to match with loading cover 23 can be converted into the high speed rotating of main shaft static the loading; Apply under the different rotating speed different loads can through axial current vortex sensor 17 and radially current vortex sensor 19,20 record dynamic rotation accuracy detection under the main shaft different rotating speeds, axial displacement and detect, and output to data display equipment 29 and carry out data or graphic presentation.
Claims (3)
1. the main shaft loading test device of a simulated condition; Comprise main axle unit (1), belt (2), servomotor (3), radial force guide holder (4), radial loaded screw rod (5), radial loaded handwheel (6), radial loaded nut seat (7), radial force sensor (8), radial loaded gauge head (9), axially load handwheel (10), axially load screw rod (11), axially load nut seat (12), axial force guide holder (13), axial force transducer (14), axially load gauge head (15), load test handle of a knife (16), axially current vortex sensor (17), sensor stand (18), radially current vortex sensor I (19), radially current vortex sensor II (20), main axle unit bearing (21), belt pulley (22), load cover (23), rolling bearing (24), force application rod (25), extend cable (26), power supply (27), front device (28), data display equipment (29), analog-digital commutator (30); It is characterized in that: described axial current vortex sensor (17) and 2 radially current vortex sensor (19), (20) are arranged on through sensor stand (18) on the shaft shoulder of main shaft and are mutually 90 °; Servomotor (3) is arranged on the test platform of simulated condition, and servomotor (3) is connected with the belt pulley (22) of main axle unit (1) rearward end through belt (2); Main axle unit (1) is fixed on the test platform through main axle unit bearing (21), and test handle of a knife (16) is arranged on main axle unit (1) leading section; Described radial loaded gauge head (9) is arranged in the hole at test force application rod (25) center; Radial force sensor (8) is provided with between inboard shoulder of radial loaded gauge head (9) and test force application rod (25) end; Test force application rod (25) passes through key connecting with radial force guide holder (4); Radial loaded screw rod (5) and radial loaded nut seat (7) thread connection; Radial loaded handwheel (6) is arranged on the outer end of radial loaded screw rod (5), and described radial loaded screw rod (5) is fixed on the test platform through radial loaded nut seat (7) and radial force guide holder (4) with radial loaded gauge head (9) and tests the vertical side of handle of a knife (16) and make radial loaded gauge head (9) coaxial with radial loaded screw rod (5) with loading; Described axial loading gauge head (17) is arranged in the hole at test force application rod (25) center; Axial force transducer (14) is provided with between inboard shoulder of axial loading gauge head (17) and test force application rod (25) end; Test force application rod (25) passes through key connecting with axial force guide holder (13); Axially load screw rod (11) and axially load nut seat (12) thread connection; Axially load the outer end that handwheel (10) is arranged on axial loading screw rod (11), described axial loading screw rod (11) with axially load gauge head (15) through axially load nut seat (12) and axial force guide holder (13) be fixed on the test platform with load test handle of a knife (16) end and make axial loading gauge head (15) and axial loading screw rod (11) and loading test handle of a knife coaxial.
2. the main shaft loading test device of simulated condition according to claim 1, it is characterized in that: described radial force guide holder (4) and axial force guide holder (13) are provided with force application rod (25).
3. the main shaft loading test device of simulated condition according to claim 1; It is characterized in that: described current vortex sensor test macro comprises axial force transducer (14), radial force sensor (8), axial radially current vortex sensor (19), (20) of current vortex sensor (17), 2; Extend cable (26), front device (28), power supply (27) and data display equipment (29); Analog-digital commutator (30); Described axial current vortex sensor (17), 2 radially current vortex sensor (19), (20) are connected with front device (28) input end through extending cable (26); Described power supply (27) and front device (28) and axial force transducer (14), radial force sensor (8) power interface are connected, and described data display equipment (29) is connected with front device (28) and analog-digital commutator (30) output interface.
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| CN103616180A (en) * | 2013-10-21 | 2014-03-05 | 浙江大学 | Bearing radial dynamic loading fault simulation diagnosis test bed |
| CN104019986A (en) * | 2014-06-24 | 2014-09-03 | 沈阳机床(集团)有限责任公司 | Reliability loading testing device and method for main shaft of numerically controlled lathe |
| CN104123879A (en) * | 2014-07-22 | 2014-10-29 | 南京理工大学 | Drilling simulating experiment device |
| CN104614176A (en) * | 2015-02-15 | 2015-05-13 | 邵阳学院 | Electric spindle performance testing bench |
| CN104776987A (en) * | 2015-03-20 | 2015-07-15 | 浙江大学 | Main shaft performance testing platform and testing method of testing platform |
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| CN105716845A (en) * | 2016-02-01 | 2016-06-29 | 吉林大学 | Typical condition simulated loading type power knife rest detecting monitoring method and device |
| CN106181575A (en) * | 2015-04-29 | 2016-12-07 | 武汉重型机床集团有限公司 | A kind of heavy duty high-speed electric main shaft on-line loaded platform and using method thereof |
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