CN202648935U - Cylindrical grinding machine grinding carriage main shaft rigidity measuring device - Google Patents
Cylindrical grinding machine grinding carriage main shaft rigidity measuring device Download PDFInfo
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- CN202648935U CN202648935U CN 201220278843 CN201220278843U CN202648935U CN 202648935 U CN202648935 U CN 202648935U CN 201220278843 CN201220278843 CN 201220278843 CN 201220278843 U CN201220278843 U CN 201220278843U CN 202648935 U CN202648935 U CN 202648935U
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- hydraulic cylinder
- grinding
- force application
- main shaft
- application rod
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000011068 load Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Abstract
The utility model relates to a cylindrical grinding machine grinding carriage main shaft rigidity measuring device including a current vortex displacement sensor, a hydraulic cylinder driver, a force application rod, a hydraulic cylinder controller, a force transducer, and a thrust rod. The force application rod is arranged under the main shaft of a grinding carriage, the thrust rod and the hydraulic cylinder driver are connected under the force application rod, the hydraulic cylinder driver is connected to the signal output end of a computer via a hydraulic cylinder controller, the force transducer is arranged between the force application rod and the thrust rod, the current vortex displacement sensor is arranged on the grinding carriage, the current vortex displacement sensor and the force transducer are respectively connected to the signal input end of an A/D acquisition card via a current vortex displacement sensor signal processor and a force transducer signal processor, and the signal output end of the A/D acquisition card is connected with the signal input end of the computer. The rigidity measuring device can conveniently measure the rigidity of the different grinding carriage main shafts and can analyze the dynamic characteristics of the different grinding carriage main shafts by comparing the testing results, as well as can effectively improve the grinding efficiency and quality of grinding workpieces.
Description
Technical field
The utility model relates to a kind of machine tool chief axis stiffness measurement device, especially a kind of measurement mechanism for the Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness.
Background technology
Along with the development of modern precision Grinding Technology, more and more higher to the rigidity requirement of each parts of lathe.The grinding carriage system is the weak link of whole lathe, and its main shaft is the critical component of grinding carriage system.Experimental study shows, no matter be running-in test, exciter test or grinding test, the rigidity size that its result all shows main shaft of grinding carriage has very large impact to the dynamic instability of whole cylindrical grinder.At present, the Dynamic Characteristic Modeling analysis is carried out in to foreign round grinding of lot of domestic and international scholar, and wherein main shaft of grinding carriage rigidity is important parameter in the model.In the actual grinding process, because grinder structure is complicated, main shaft of grinding carriage rigidity size often is difficult to accurate acquisition.Rigidity is the ability of mechanical component and member resistance to deformation, is to act on the increment of power on the flexible member or moment and the ratio of the increment of corresponding displacement or angular displacement.Main shaft of grinding carriage rigidity size can directly affect the working ability of lathe, with chatter phenomenon in the grinding process direct relation is arranged.
Therefore, how effectively Measurement accuracy grinder wheel frame main axis stiffness size is significant for accurate analysis grinding dynamic perfromance, raising workpiece grinding quality and grinding efficiency.
Summary of the invention
The utility model is that a kind of Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism will be provided, this device can be convenient for measuring out the size of different main shaft of grinding carriage rigidity, go out the dynamic perfromance of different main shaft of grinding carriages by the comparison test test result analysis, but the grinding efficiency of effective supply grinding work piece and grinding quality.
The technical solution of the utility model is: a kind of Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism, comprise eddy current displacement sensor, hydraulic cylinder drive, force application rod, current vortex sensor signal processor, force sensor signals processor, hydraulic cylinder control device, power sensor, distance rod, A/D capture card and computing machine, be characterized in: force application rod is housed below the main shaft of grinding carriage, be connected with distance rod and hydraulic cylinder drive below the force application rod, hydraulic cylinder drive is connected with the Computer signal output terminal by hydraulic cylinder control device; Be provided with the power sensor between force application rod and the distance rod, be provided with eddy current displacement sensor above the main shaft of grinding carriage, eddy current displacement sensor and power sensor are connected with A/D capture card signal input part with the force sensor signals processor by the current vortex sensor signal processor respectively, and A/D capture card signal output part is connected with the Computer signal input end.
Distance rod is fixedly connected with the power sensor by bolt with force application rod.
The force application rod upper end is provided with V-shaped groove, and is connected with the main shaft of grinding carriage contact by V-shaped groove.
Be equipped with Chebyshev I type digital filter in current vortex sensor signal processor and the force sensor signals processor, be used for the data that gather are carried out low-pass filtering treatment.
The beneficial effects of the utility model are:
Pass through the utility model, can effectively measure main shaft of grinding carriage rigidity size, go out the dynamic perfromance of different main shaft of grinding carriages by the comparison test test result analysis, in actual Grinding Process, can regulate the grinding grinding process parameters according to this main shaft of grinding carriage dynamic perfromance, significant to improving workpiece grinding surface quality and grinding efficiency.
Description of drawings
Fig. 1 is Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism structural representation;
Fig. 2 is the force application rod structural representation.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism forms by apply power apparatus and force signal device and displacement signal harvester to main shaft.It comprises eddy current displacement sensor 3, hydraulic cylinder drive 6, force application rod 7, current vortex sensor signal processor 9, force sensor signals processor 10, hydraulic cylinder control device 11, power sensor 14, distance rod 15, A/D capture card 12 and computing machine 13 etc.
Be positioned at and force application rod 7 be housed below the main shaft of grinding carriage 2 of main shaft of grinding carriage case 1 front end, be connected with distance rod 15 and hydraulic cylinder drive 6 below the force application rod 7, hydraulic cylinder drive 6 is by hydraulic cylinder drive control line 8 connecting fluid cylinder pressure controllers 11, and hydraulic cylinder control device 11 is connected with computing machine 13 signal output parts; Be provided with power sensor 14 between force application rod 7 and the distance rod 15, be provided with eddy current displacement sensor 3 above the main shaft of grinding carriage 2, eddy current displacement sensor 3 is connected with the power sensor respectively to be connected with the force sensor signals output line to be connected with the force sensor signals processor with current vortex sensor signal processor 9 by current vortex sensor output line 4 and is connected, current vortex sensor signal processor 9 is connected defeated number output terminal and is connected with A/D capture card 12 signal input parts respectively with the force sensor signals processor, A/D capture card 12 signal output parts are connected with computing machine 13 signal input parts.
Applying power apparatus is to send signal by computing machine 13, through hydraulic cylinder control device 11 control hydraulic cylinder drive minute movement about in the of 6, by distance rod 15, power sensor 14, force application rod 7 with loading force
Be applied on the main shaft of grinding carriage 2.Wherein distance rod 15 is to be fixedly connected with power sensor 14 by the bolt mode with force application rod 7.As shown in Figure 2, force application rod 7 upper ends are provided with V-shaped groove, and are connected with main shaft of grinding carriage 2 contacts by V-shaped groove.Force application rod 7 shapes can realize in the measuring process in imposed load power
Main shaft of grinding carriage 2 is also rotatable simultaneously.
Data acquisition: as shown in Figure 1, the sample frequency of setting calibrate AE sensor signal A/D capture card 12 is
, after debugging, guarantee whole measurement mechanism normal operation, after the experiment beginning, start main shaft of grinding carriage 2 with rotating speed
Choosing turns, and records eddy current displacement sensor signal initial value
With the force sensor signals initial value
, then control hydraulic cylinder drive 6 with loading force by computing machine 13
Be applied on the main shaft of grinding carriage 2 of choosing dress, wait eddy current displacement sensor and force sensor signals stable after, record the eddy current displacement sensor signal value
With the force sensor signals value
Data filtering is processed: in order to remove the high-frequency interferencing signals such as environment temperature and electromagnetic environment to the impact of experimental measurements, this patent uses Chebyshev I type digital filter that the data that gather are carried out low-pass filtering treatment, and its concrete grammar principle is as follows.
Chebyshev I mode filter
Rank amplitude square function is following formula (1)
（1）
Wherein:
, the degree of amplitude fluctuation in the expression passband;
Be cut-off frequecy of passband; And
That wave filter is at cutoff frequency
Magnification.
The rank Chebyshev polynomials, as shown in the formula (2) and formula (3):
；
（3）
By to the displacement signal of collection and the radio-frequency component analysis of force signal, determine the cutoff frequency of low-pass filter
, parameter
And exponent number
4) by above-mentioned experimental data collection analysis, calculate main shaft of grinding carriage rigidity size, its computing method are as shown in the formula shown in (4).
（4）
Can calculate measured main shaft of grinding carriage rigidity size by above-mentioned (4), go out the dynamic perfromance of different main shaft of grinding carriages by the comparison test test result analysis, in actual Grinding Process, can regulate the grinding grinding process parameters according to this main shaft of grinding carriage dynamic perfromance, improve grinding efficiency and the grinding quality of processing work.
Claims (4)
1. Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism, comprise eddy current displacement sensor (3), hydraulic cylinder drive (6), force application rod (7), current vortex sensor signal processor (9), force sensor signals processor (10), hydraulic cylinder control device (11), power sensor (14), distance rod (15), A/D capture card (12) and computing machine (13), it is characterized in that: force application rod (7) is housed below the main shaft of grinding carriage (2), be connected with distance rod (15) and hydraulic cylinder drive (6) below the force application rod (7), hydraulic cylinder drive (6) is connected with computing machine (13) signal output part by hydraulic cylinder control device (11); Be provided with power sensor (14) between force application rod (7) and the distance rod (15), be provided with eddy current displacement sensor (3) above the main shaft of grinding carriage (2), eddy current displacement sensor (3) is connected 14 with the power sensor) be connected 10 by current vortex sensor signal processor (9) with the force sensor signals processor respectively) be connected with A/D capture card (12) signal input part, A/D capture card (12) signal output part is connected with computing machine (13) signal input part.
2. Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism according to claim 1, it is characterized in that: described distance rod (15) is fixedly connected with power sensor (14) by bolt with force application rod (7).
3. Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism according to claim 1 is characterized in that: be provided with V-shaped groove on the described force application rod (7), and be connected with main shaft of grinding carriage (2) contact by V-shaped groove.
4. Wheel Head of A Universal Cylindrical Grinding Machine main axis stiffness measurement mechanism according to claim 1, it is characterized in that: be equipped with Chebyshev I type digital filter in described current vortex sensor signal processor (9) and the force sensor signals processor (10), be used for the data that gather are carried out low-pass filtering treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278843 CN202648935U (en) | 2012-06-14 | 2012-06-14 | Cylindrical grinding machine grinding carriage main shaft rigidity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278843 CN202648935U (en) | 2012-06-14 | 2012-06-14 | Cylindrical grinding machine grinding carriage main shaft rigidity measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN202648935U true CN202648935U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220278843 Expired - Fee Related CN202648935U (en) | 2012-06-14 | 2012-06-14 | Cylindrical grinding machine grinding carriage main shaft rigidity measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202648935U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692321A (en) * | 2012-06-14 | 2012-09-26 | 上海理工大学 | Rigidity measuring device for grinding carriage spindle of cylindrical grinding machine |
| CN103273387A (en) * | 2013-06-18 | 2013-09-04 | 上海理工大学 | Stiffness-measurement-based optimization method for cylindrical grinding process parameters |
-
2012
- 2012-06-14 CN CN 201220278843 patent/CN202648935U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692321A (en) * | 2012-06-14 | 2012-09-26 | 上海理工大学 | Rigidity measuring device for grinding carriage spindle of cylindrical grinding machine |
| CN103273387A (en) * | 2013-06-18 | 2013-09-04 | 上海理工大学 | Stiffness-measurement-based optimization method for cylindrical grinding process parameters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20130614 |