CN106312816A - Grinder spindle axial thermal error detection device - Google Patents
Grinder spindle axial thermal error detection device Download PDFInfo
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- CN106312816A CN106312816A CN201510369073.2A CN201510369073A CN106312816A CN 106312816 A CN106312816 A CN 106312816A CN 201510369073 A CN201510369073 A CN 201510369073A CN 106312816 A CN106312816 A CN 106312816A
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- axial thermal
- thermal error
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 230000011664 signaling Effects 0.000 claims description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 12
- 229910001651 emery Inorganic materials 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 3
- 238000000034 method Methods 0.000 description 10
- 230000004323 axial length Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
- B24B49/105—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means using eddy currents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Control Of Machine Tools (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention belongs to the technical field of machine tool error compensation and particularly relates to a grinder spindle axial thermal error detection device. The invention provides the grinder spindle axial thermal error detection device accurate in measurement and convenient to use. The grinder spindle axial thermal error detection device comprises a transverse slide way and is structurally characterized in that one end of the transverse slide way is connected with the upper end of a machine tool Y axis; the lower end of the machine tool Y axis is arranged on a machine tool Y axis track; the other end of the transverse slide way is connected with the upper end of a bracket inclined towards the front side; the lower end of the bracket is connected with the back end of a transverse linear stepping motor; the front-end driving output end of the linear stepping motor is connected with an electrical vortex sensor; the machine tool Y axis is provided with a machine tool Z axis which can move up and down; the front end of the machine tool Z axis is connected with the back end of a machine tool machining spindle; the front end of the machine tool machining spindle is provided with a vertical grinding wheel; and the electrical vortex sensor is arranged above the machine tool machining spindle and behind the vertical grinding wheel.
Description
Technical field
The invention belongs to machine tool error compensation technique field, particularly relate to a kind of grinding machine spindle Axial Thermal error detecting apparatus.
Background technology
At present, the main path and the both economical method that improve machine finish are installation grating scales on main shaft, are compensated the error caused due to elements such as leading screws by closed loop control.But owing to grating scale feedack is change of (including that leading screw changes) part within leading screw, main shaft and main shaft institute band cutter etc. can not be done closed-loop process, so being not complete proper closed loop control.In workpiece process, owing to the high speed rotating of main shaft and consequent heat can cause the thermal expansion of main shaft itself, the error thereby resulted in, current closed loop control can not be compensated.
When CNC working host uses main shaft to cut (grinding machine is also the same reason) action, expansion elongation during spindle operation can cause surface cut precision to change, main cause has two: the centrifugal forces affect caused along with the rising of rotating speed during operating, can make hilt stretch downward, Another reason then rises, for temperature during operating, the thermal expansion caused.In a word, the elongation of spindle operation is to be caused plus the time difference of temperature by the impact of centrifugal force.Actual cut adds the centrifugal force difference caused by man-hour, different hilts and different rotating speeds at the scene, and main shaft elongation is the most different；Meanwhile, when tool contact to workpiece, different cutting force can offset centrifugal forces affect relatively.Have tried in the past use the relation between temperature sensor or application Temperature calculating main shaft temperature and variable quantity, elongate axis amount of deciding compensates, achieve certain effect, but cannot conscientiously grasp the essence of problem, reason is that the elongation of main shaft is not a constant, containing including opposing factors (practical service environment etc.).
Summary of the invention
The present invention is aiming at the problems referred to above, it is provided that a kind of measure grinding machine spindle Axial Thermal error detecting apparatus accurate, easy to use.
For achieving the above object, the present invention adopts the following technical scheme that, the present invention includes transverse slipway, and its structural feature transverse slipway one end is connected with lathe Y-axis upper end, and lathe Y-axis lower end is arranged on lathe Y-axis track；The pedestal upper end that the transverse slipway other end tilts with forward side is connected, and pedestal lower end is connected with the rear end of horizontal linear stepping motor, and the front-end driven outfan of linear stepping motor is connected with current vortex sensor；Being provided with machine Z-axis moving up and down in described lathe Y-axis, the front end of machine Z-axis is connected with the rear end of machine tool spindle, and the front end of machine tool spindle is provided with vertical emery wheel；Described current vortex sensor is placed in the top of machine tool spindle, the rear of vertical emery wheel.
As a kind of preferred version, the pedestal upper end that the transverse slipway other end of the present invention is tilted with forward side by steering lock mechanism is connected.
As another kind of preferred version, steering lock mechanism of the present invention includes being embedded in slideway the steering ball rotated that can slide in slideway, and steering ball is connected with described pedestal upper end；Transverse slipway outer end is fixed with vertical connector upper end, and vertical connector lower end is provided with horizontal inserted link, and horizontal inserted link outer end is provided with external screw thread；On described support, described horizontal inserted link is provided with jack；Jack is multiple, arranges along stent length direction.
As another kind of preferred version, the front-end driven outfan of linear stepping motor of the present invention is connected with the vertical sheet that is connected by vertically connecting the lower cross-drilled hole of sheet, and vertical connection sheet upper end is connected with described current vortex sensor by vertically connecting the upper cross-drilled hole of sheet.
As another kind of preferred version, the detection signal output port of current vortex sensor of the present invention is connected with the detection signal input port of signaling conversion circuit, the detection signal output port of signaling conversion circuit is connected with the detection signal input port of CPU, the keyboard signal input port of CPU is connected with the keyboard signal output port of keyboard, the display signal output port of CPU is connected with the display signal input port of display, the motor drive signal output port of CPU is connected with the driving signal input mouth of linear stepping motor driver, the PORT COM of CPU is connected with the PORT COM of host computer.
As another kind of preferred version, signaling conversion circuit of the present invention includes LM324 chip, 1 foot of LM324 chip respectively with the detection signal input port of CPU, first resistance one end is connected, the first resistance other end respectively with 3 feet of LM324 chip, second resistance one end is connected, the second resistance other end respectively with the first electric capacity, the detection signal input port of signaling conversion circuit is connected, the first electric capacity other end respectively with 2 feet of LM324 chip, 3rd resistance one end is connected, the 3rd resistance other end respectively with the 4th resistance one end, second electric capacity one end is connected, the second electric capacity other end is connected with 4 feet of LM324 chip, the 4th resistance other end is connected with detection signal input port.
As another kind of preferred version, linear stepping motor driver of the present invention uses optocoupler driver.
As another kind of preferred version, the PORT COM of CPU of the present invention is connected with the PORT COM of CNC system.
Secondly, the step-length of linear stepping motor of the present invention is 0.001524mm, a size of 68 × 35mm, and weight is 162g, and thrust is 12kg.
It addition, lower end, lathe Y-axis track side of the present invention is provided with grating scale.
Beneficial effect of the present invention.
The present invention, based on practical service environment, does not considers the reason causing main shaft to change, and only starts with consideration from main shaft variable quantity.Recording main shaft real-time change amount in processing workpiece fabrication, current vortex sensor is sent owing to variations in temperature causes, and the signal linear with the change of grinding machine spindle axial length；Detection data, the main shaft that variations in temperature is caused change are provided to accomplish to compensate control, improve machine finish for real-Time Compensation.
The present invention provides the hardware foundation of a kind of grinding machine spindle Axial Thermal error detecting apparatus.
Current vortex sensor position adjustments of the present invention is realized by transverse slipway, support, linear stepping motor, can distance between high-precision adjustment sensor and the tested position of grinding machine spindle, the distance being realized mm or μm level by linear stepping motor is adjusted.
Accompanying drawing explanation
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.Scope is not only limited to the statement of herein below.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the 1-1 position enlarged drawing in Fig. 1.
Fig. 3 is the 2-2 position enlarged drawing in Fig. 2.
Fig. 4 is slideway of the present invention and steering lock mechanism section structural representation.
Fig. 5 is the 3-3 sectional view in Fig. 4.
Fig. 6 is the 4-4 position enlarged drawing in Fig. 4.
Fig. 7 is schematic block circuit diagram of the present invention.
In figure: 1. lathe Y-axis track；2. lathe Y-axis；3. machine Z-axis；4. machine tool spindle；5. emery wheel；6. power supply and holding wire；7. current vortex sensor；8. connect sheet；9. linear stepping motor；10. support；11. slideways；12. steering lock mechanisms；13. linear stepping motor power supply and control lines；14. controllers；15. grating scales；16. lathe X-axis tracks；17. workpiece fixtures；18.X axle；19. controller CPU(8051)；20. display；21. keyboards；22. from the holding wire of eddy current sensor；23. linear stepping motor drivers；24. signaling conversion circuits；25. steering balls；26. through holes；27. external screw threads.
Detailed description of the invention
As it can be seen, the present invention includes transverse slipway, its structural feature transverse slipway one end is connected with lathe Y-axis upper end, and lathe Y-axis lower end is arranged on lathe Y-axis track；The pedestal upper end that the transverse slipway other end tilts with forward side is connected, and pedestal lower end is connected with the rear end of horizontal linear stepping motor, and the front-end driven outfan of linear stepping motor is connected with current vortex sensor；Being provided with machine Z-axis moving up and down in described lathe Y-axis, the front end of machine Z-axis is connected with the rear end of machine tool spindle, and the front end of machine tool spindle is provided with vertical emery wheel；Described current vortex sensor is placed in the top of machine tool spindle, the rear of vertical emery wheel.
The pedestal upper end that the described transverse slipway other end is tilted with forward side by steering lock mechanism is connected.
Described steering lock mechanism includes being embedded in slideway the steering ball rotated that can slide in slideway, and steering ball is connected with described pedestal upper end；Transverse slipway outer end is fixed with vertical connector upper end, and vertical connector lower end is provided with horizontal inserted link, and horizontal inserted link outer end is provided with external screw thread；On described support, described horizontal inserted link is provided with jack；Jack is multiple, arranges along stent length direction.Multiple jack is set and is easy to the adjustment of current vortex sensor position.
Described horizontal inserted link can pass jack, is fixed together with slideway by support with nut.Constitute a triangular structure, keep support to fix.
The front-end driven outfan of described linear stepping motor is connected with the vertical sheet that is connected by vertically connecting the lower cross-drilled hole of sheet, and vertical connection sheet upper end is connected with described current vortex sensor by vertically connecting the upper cross-drilled hole of sheet.
The detection signal output port of described current vortex sensor is connected with the detection signal input port of signaling conversion circuit, the detection signal output port of signaling conversion circuit is connected with the detection signal input port of CPU, the keyboard signal input port of CPU is connected with the keyboard signal output port of keyboard, the display signal output port of CPU is connected with the display signal input port of display, the motor drive signal output port of CPU is connected with the driving signal input mouth of linear stepping motor driver, and the PORT COM of CPU is connected with the PORT COM of host computer.
Described signaling conversion circuit includes LM324 chip, 1 foot of LM324 chip respectively with the detection signal input port of CPU, first resistance one end is connected, the first resistance other end respectively with 3 feet of LM324 chip, second resistance one end is connected, the second resistance other end respectively with the first electric capacity, the detection signal input port of signaling conversion circuit is connected, the first electric capacity other end respectively with 2 feet of LM324 chip, 3rd resistance one end is connected, the 3rd resistance other end respectively with the 4th resistance one end, second electric capacity one end is connected, the second electric capacity other end is connected with 4 feet of LM324 chip, the 4th resistance other end is connected with detection signal input port.The analog quantity signal of current vortex sensor is amplified, removes and make an uproar and be converted to digital quantity signal proportional therewith by signaling conversion circuit, finally sends, to facilitate host computer or CNC control unit to directly invoke.
Described linear stepping motor driver uses optocoupler driver.
The PORT COM of described CPU is connected with the PORT COM of CNC system.
The step-length of described linear stepping motor is 0.001524mm, a size of 68 × 35mm, and weight is 162g, and thrust is 12kg.
Lower end, described lathe Y-axis track side is provided with grating scale.
The work process of the present invention is described below in conjunction with the accompanying drawings.
1, lathe is to cutter.
During beginning, it is ensured that detection device is positioned at the position not hindering machine tool chief axis to move.Now, lathe passes through X, Y, Z axis each track, automatically adjusts Y-axis, and the position of Z axis makes emery wheel be in optimum position relative with the workpiece on fixture, and the origin position of each system of lathe determines.
2, eddy current sensor position is adjusted.
Manual coarse adjustment: by slideway and steering lock mechanism, manually make the distance of current vortex sensor and detection site within the specific limits.Now, current vortex sensor is the least with the distance of detection site, manually adjusts and will become difficulty.Then by the position of the locked support of steering lock mechanism, make support generally in locking state, it is impossible to enough to carry out any movement again.
Automatic fine tuning: by keyboard, makes linear stepping motor move to test section displacement.The distance that linear stepping motor moves can be micron order, it is assumed that controller 15 pulses of output represent linear stepping motor and move 1.5 microns, then inputting corresponding pulses number on keyboard just can be by the displacement of driver control motor.Meanwhile, can be at the upper real-time display distance of display (led shows liquid crystal display screen).So, the distance between controlled vortex flow sensor and cutter (emery wheel) can just be reached in the reasonable scope by display and keyboard.
3, work pieces process.
After the distance of current vortex sensor and detection site (emery wheel) meets the measurement area requirement of current vortex sensor (250-500 μm), grinding machine just can carry out machined of workpiece according to default program.Along with the passage of process time, spindle motor heat to be produced, simultaneously heat to be produced between emery wheel and workpiece, this two-part heat will gradually be transmitted on main shaft, and make main shaft temperature increase, thus cause main shaft to expand.Current vortex sensor detects the axial length variable quantity of main shaft in real time, then the analog signals of variable quantity is delivered to controller and processes further and become digital quantity signal.Controller can be with CNC real-time communication, the signal just can uploaded with controller in CNC program, carries out the compensation of swell increment on main shaft axial length, thus reaches to improve the purpose of processing workpiece accuracy.
4, lathe resets and removes detection device.
After process finishing, CNC system resets.Support is unlocked, then current vortex sensor moves on to not affect by support and slideway the place of lower part, and locks support.Finally take off the workpiece after processing.
Owing to this device is to use on grinding machine, practical situation is complex, and particularly residing environment space ratio is narrow, it is desirable to package unit can not be too big, especially current vortex sensor and the entirety both linear stepping motor, it is desirable to the smaller the better.So the linear electric motors used in this device are high accuracy linear stepping motor (step-length 0.001524mm), size less (68 × 35mm), weight the least (162g), but thrust is very big (12kg).
Controller in this device is in outside lathe, and one is easy for operation, and two is above said narrow space problem.Whole controller by the driver of linear stepping motor, with real-time Communication for Power circuit, keyboard and display circuit all centralized integration of CNC to together with, input the detection signal into current vortex sensor, be output as the travel distance of linear stepping motor.
It is understandable that, above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to the technical scheme described by the embodiment of the present invention, it will be understood by those within the art that, still the present invention can be modified or equivalent, to reach identical technique effect；Needs are used, all within protection scope of the present invention as long as meeting.
Claims (10)
1. grinding machine spindle Axial Thermal error detecting apparatus, including transverse slipway, it is characterised in that transverse slipway one end is connected with lathe Y-axis upper end, and lathe Y-axis lower end is arranged on lathe Y-axis track；The pedestal upper end that the transverse slipway other end tilts with forward side is connected, and pedestal lower end is connected with the rear end of horizontal linear stepping motor, and the front-end driven outfan of linear stepping motor is connected with current vortex sensor；Being provided with machine Z-axis moving up and down in described lathe Y-axis, the front end of machine Z-axis is connected with the rear end of machine tool spindle, and the front end of machine tool spindle is provided with vertical emery wheel；Described current vortex sensor is placed in the top of machine tool spindle, the rear of vertical emery wheel.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 1, it is characterised in that the pedestal upper end that the described transverse slipway other end is tilted with forward side by steering lock mechanism is connected.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 2, it is characterised in that described steering lock mechanism includes being embedded in slideway the steering ball rotated that can slide in slideway, and steering ball is connected with described pedestal upper end；Transverse slipway outer end is fixed with vertical connector upper end, and vertical connector lower end is provided with horizontal inserted link, and horizontal inserted link outer end is provided with external screw thread；On described support, described horizontal inserted link is provided with jack；Jack is multiple, arranges along stent length direction.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 1, it is characterized in that the front-end driven outfan of described linear stepping motor is connected with the vertical sheet that is connected by vertically connecting the lower cross-drilled hole of sheet, vertical connection sheet upper end is connected with described current vortex sensor by vertically connecting the upper cross-drilled hole of sheet.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 1, it is characterized in that the detection signal output port of described current vortex sensor is connected with the detection signal input port of signaling conversion circuit, the detection signal output port of signaling conversion circuit is connected with the detection signal input port of CPU, the keyboard signal input port of CPU is connected with the keyboard signal output port of keyboard, the display signal output port of CPU is connected with the display signal input port of display, the motor drive signal output port of CPU is connected with the driving signal input mouth of linear stepping motor driver, the PORT COM of CPU is connected with the PORT COM of host computer.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 5, it is characterized in that described signaling conversion circuit includes LM324 chip, 1 foot of LM324 chip respectively with the detection signal input port of CPU, first resistance one end is connected, the first resistance other end respectively with 3 feet of LM324 chip, second resistance one end is connected, the second resistance other end respectively with the first electric capacity, the detection signal input port of signaling conversion circuit is connected, the first electric capacity other end respectively with 2 feet of LM324 chip, 3rd resistance one end is connected, the 3rd resistance other end respectively with the 4th resistance one end, second electric capacity one end is connected, the second electric capacity other end is connected with 4 feet of LM324 chip, the 4th resistance other end is connected with detection signal input port.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 5, it is characterised in that described linear stepping motor driver uses optocoupler driver.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 5, it is characterised in that the PORT COM of described CPU is connected with the PORT COM of CNC system.
The most according to claim 1, grinding machine spindle Axial Thermal error detecting apparatus, it is characterised in that the step-length of described linear stepping motor is 0.001524mm, a size of 68 × 35mm, weight is 162g, and thrust is 12kg.
Grinding machine spindle Axial Thermal error detecting apparatus the most according to claim 1, it is characterised in that lower end, described lathe Y-axis track side is provided with grating scale.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510369073.2A CN106312816B (en) | 2015-06-30 | 2015-06-30 | Grinding machine spindle Axial Thermal error detecting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510369073.2A CN106312816B (en) | 2015-06-30 | 2015-06-30 | Grinding machine spindle Axial Thermal error detecting apparatus |
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| CN106312816A true CN106312816A (en) | 2017-01-11 |
| CN106312816B CN106312816B (en) | 2018-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113524042A (en) * | 2021-09-16 | 2021-10-22 | 南通斯高蕊机械设备有限公司 | Grinding wheel vibration monitoring and alarming device for grinding machine and using method thereof |
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| US4509295A (en) * | 1981-04-01 | 1985-04-09 | Estel Hoesch Werke Aktiengesellschaft | Controlled grinding of rollers for elimination of cracks |
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| CN101972947A (en) * | 2010-09-26 | 2011-02-16 | 天津大学 | Test method of machine tool spindle thermal error test under simulated condition loading condition |
| CN102122146A (en) * | 2011-01-06 | 2011-07-13 | 上海交通大学 | Thermal-error real-time compensation system for high-speed precise machining and compensation method thereof |
| CN102759900A (en) * | 2012-06-29 | 2012-10-31 | 上海三一精机有限公司 | System and method for testing machine tool spindle thermal error |
| CN103659602A (en) * | 2012-09-25 | 2014-03-26 | 宁波工程学院 | Method and device for detecting cylindrical grinding surface roughness through data fusion technology |
| CN204725323U (en) * | 2015-06-30 | 2015-10-28 | 辽宁科技学院 | Grinding machine spindle Axial Thermal error detecting apparatus |
-
2015
- 2015-06-30 CN CN201510369073.2A patent/CN106312816B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509295A (en) * | 1981-04-01 | 1985-04-09 | Estel Hoesch Werke Aktiengesellschaft | Controlled grinding of rollers for elimination of cracks |
| CN2340558Y (en) * | 1997-04-29 | 1999-09-29 | 东风汽车公司 | Online monitoring system of internal grinder by monitoring courses |
| CN101972947A (en) * | 2010-09-26 | 2011-02-16 | 天津大学 | Test method of machine tool spindle thermal error test under simulated condition loading condition |
| CN102122146A (en) * | 2011-01-06 | 2011-07-13 | 上海交通大学 | Thermal-error real-time compensation system for high-speed precise machining and compensation method thereof |
| CN102759900A (en) * | 2012-06-29 | 2012-10-31 | 上海三一精机有限公司 | System and method for testing machine tool spindle thermal error |
| CN103659602A (en) * | 2012-09-25 | 2014-03-26 | 宁波工程学院 | Method and device for detecting cylindrical grinding surface roughness through data fusion technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113524042A (en) * | 2021-09-16 | 2021-10-22 | 南通斯高蕊机械设备有限公司 | Grinding wheel vibration monitoring and alarming device for grinding machine and using method thereof |
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