CN109623490A - A kind of the Thermal Error measuring system and method for lathe - Google Patents
A kind of the Thermal Error measuring system and method for lathe Download PDFInfo
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- CN109623490A CN109623490A CN201811538981.XA CN201811538981A CN109623490A CN 109623490 A CN109623490 A CN 109623490A CN 201811538981 A CN201811538981 A CN 201811538981A CN 109623490 A CN109623490 A CN 109623490A
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- thermal error
- temperature
- displacement
- lathe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
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Abstract
The invention discloses a kind of Thermal Error measuring system of lathe, which includes at least one displacement sensor, displacement signal conditioning module, data acquisition controller, main control computer and at least one main temperature sensor；The displacement signal of at least one displacement sensor acquisition is transmitted to the data acquisition controller after the processing of institute's displacement signal conditioning module；The output signal of the data acquisition controller is transferred to the main control computer；The temperature signal of at least one main temperature sensor acquisition is transmitted to the host computer through the data acquisition controller.The present invention can measure hobboing cutter during Z axis feeding, and for the X between hob head and workpiece to Y-direction Thermal Error, the Thermal Error changing rule for research gear-hobbing machine provides more direct, accurate, abundant test data.
Description
Technical field
The present invention relates to digit ctrol machine tool fields, and in particular to a kind of the Thermal Error measuring system and method for lathe.
Background technique
There are biggish gaps in the advanced product of precision aspect and foreign countries for domestic numerical control gear machine, and Thermal Error is numerical control
The key element of machine tool accuracy loss, directly affects the teeth directional precision of workpiece gear.The research and work of gear machine Thermal Error
The basis of Cheng Yingyong is, accurate to measure temperature gradient distribution and thermal deformation changing rule.Numerical control gear machine tool thermal error embodies
In hob head and the big core end of workbench two, and existing similar triangles method can only obtain big column deformation where hobboing cutter, nothing
Method measures Thermal Error between hobboing cutter and workbench.
Summary of the invention
In view of this, to solve the above-mentioned problems, the present invention provides the Thermal Error measuring system and method for a kind of lathe.
To achieve the above object and other purposes, the present invention provide a kind of Thermal Error measuring system of lathe, the measurement system
System includes at least one displacement sensor 1, displacement signal conditioning module 2, data acquisition controller 4, main control computer 6 and at least
One main temperature sensor 10；
The displacement signal of at least one displacement sensor acquisition transmits after the processing of institute's displacement signal conditioning module
To the data acquisition controller；The output signal of the data acquisition controller is transferred to the main control computer；
The temperature signal of at least one main temperature sensor acquisition is transmitted to described through the data acquisition controller
Host computer.
Optionally, the data acquisition controller includes temperature signal collection module 7 and voltage acquisition module 3, the temperature
Degree signal acquisition module is connect at least one described main temperature sensor；The analog voltage acquisition module and the displacement are believed
The electrical connection of number conditioning module.
Optionally, which further includes at least one auxiliary temperature sensors 9, with the temperature signal collection module
The data of electrical connection, the temperature signal collection module acquisition are transferred to the main control computer.
Optionally, the output signal of the output signal of the temperature signal collection module and the analog voltage acquisition module
The main control computer is transmitted to through gateway 5.
Optionally, the temperature signal collection module uses 3 line RTD modes and 24 analog-digital converters；The voltage is adopted
Collect module and uses 16 analog-digital converters, the acquisition of 8 Channel Synchronous.
To achieve the above object and other purposes, the present invention also provides a kind of method for measuring thermal error of lathe, this method
Are as follows:
With table spindle to for Z-direction, the direction of hobboing cutter forward or backward is Y direction, both perpendicular to Y direction
Direction with Z-direction is X-axis；
1 eddy current displacement sensor is respectively arranged in XZ planar radial and YZ planar radial, for obtaining hobboing cutter and work
Thermal Error between platform；
2 eddy current displacement sensors are being placed equidistant in XZ planar radial direction, in the equidistant cloth in YZ planar radial direction
2 eddy current displacement sensors are set, for obtaining the Thermal Error of platen.
Optionally, the main control computer obtains Z axis position in real time, the Thermal Error measured in conjunction with current vortex describe hobboing cutter with
The distribution of Thermal Error between workbench along Z axis.
Optionally, temperature sensor setting hobboing cutter spindle motor shell, hobboing cutter axle bearing, coolant liquid inlet/outlet pipe,
The big column of lathe, table motor shell, workbench side, at lathe bed heat-sensitive component and table surface, work piece holder
With the position of worktable rotary, environment temperature, measurement measuring point temperature.
By adopting the above-described technical solution, the present invention has the advantage that:
Precision machine tool main shaft performance test system proposed by the present invention has real-time temperature collection and displacement, automatic guarantor
The function of deposit data has stronger anti-interference ability, high-precision and extremely strong expansion capability；Develop the temperature of multichannel and more
The synchronization detection system of channel Thermal Error, the synchro measure of the two miss the changing rule of research thermal characteristic of machine tools to heat is disclosed
Difference and temperature between relation of interdependence and Thermal Error along lathe Z-direction distribution important in inhibiting.Relative displacement measurement
Method can not only measure the hot pitch angle of radial direction and radial hot deflection angle of workbench, can also measure hobboing cutter and feed along Z axis
In the process, to Y-direction Thermal Error, the Thermal Error changing rule for research gear-hobbing machine provides more the X between hob head and workpiece
For test data direct, accurate, abundant.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
The detailed description of one step:
Fig. 1 heavy duty machine tools Thermal Error measuring system structural schematic diagram；
Fig. 2 Relative Displacement Method instrumentation plan.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
It should be noted that the basic conception that only the invention is illustrated in a schematic way is illustrated provided in the present embodiment,
Then only shown in schema with it is of the invention in related component rather than component count, shape and size when according to actual implementation draw
System, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel can also
It can be increasingly complex.
Fig. 1,2 are please referred to, the present invention provides a kind of Thermal Error measuring system of lathe, which includes at least one
Displacement sensor 1, displacement signal conditioning module 2, data acquisition controller 4, main control computer 6 and at least one main temperature sensing
Device 10；
The displacement signal (error in teeth directional direction) of at least one displacement sensor acquisition is through institute's displacement signal tune
The data acquisition controller is transmitted to after reason resume module；The output signal of the data acquisition controller is transferred to described
Main control computer；
The temperature signal of at least one main temperature sensor acquisition is transmitted to described through the data acquisition controller
Host computer.Main temperature sensor measurement is the temperature of machine tool chief axis key point, including is arranged outside hobboing cutter spindle motor
The temperature-sensitives such as shell, hobboing cutter axle bearing, coolant liquid inlet/outlet pipe, the big column of lathe, table motor shell, workbench side, lathe bed
Feel component at and environment temperature and measurement measuring point temperature.
The main control computer is realized realizes that machine Z-axis position is extracted on PC, display, analysis and the preservation number of data
According to the functions such as acquisition equipment condition monitoring.
In an embodiment, the data acquisition controller includes temperature signal collection module 7 and voltage acquisition module 3,
The temperature signal collection module is connect at least one described main temperature sensor；The analog voltage acquisition module with it is described
The electrical connection of displacement signal conditioning module.Optionally, the temperature signal collection module is turned using 3 line RTD modes and 24 moduluses
Parallel operation；The voltage acquisition module uses 16 analog-digital converters, the acquisition of 8 Channel Synchronous.
In an embodiment, which further includes at least one auxiliary temperature sensors 9, is adopted with the temperature signal
Collect module electrical connection, the data of the temperature signal collection module acquisition are transferred to the main control computer.Auxiliary temperature passes
Sensor 9 is arranged in table surface, work piece holder etc. with the position of worktable rotary.The temperature being connect with auxiliary temperature sensors 9
Degree signal acquisition module can use wireless type temperature signal collection module 8.The wireless type temperature signal collection module 8 acquires
The signal of the output of auxiliary temperature sensors 9 simultaneously establishes TCP communication by WiFi and gateway 5 and main control computer, and lathe is worked
Temperature data on platform is sent to main control computer 6.
The main temperature sensor 10 is connect by temperature signal terminal with temperature signal collection module；The displacement sensing
Device 1 accesses the input terminal of displacement signal conditioning module 2, the output end of displacement signal conditioning module 2 by BNC connector with connect；
The data acquisition controller connect computer with gateway by cable, carries out independent isolating filtering to every road displacement input
And 16 A/D conversions, it is quantization displacement data by sensor analog signals discrete sampling, it will be warm by slave computer acquisition software
Degree/displacement data is sent to main control computer 6.
Referring to Fig. 2, a kind of method for measuring thermal error of lathe, is missed using the heat of Relative Displacement Method measurement axis system
Difference.
With table spindle to for Z-direction, the direction of hobboing cutter forward or backward is Y direction, both perpendicular to Y direction
Direction with Z-direction is X-axis；
Specifically,
It arranges that 2 eddy current displacement sensors are fixedly connected with hob head, measures wherein S5Mandrel diameter is directed toward in XZ plane
To direction, S6Mandrel radial direction is directed toward in YZ plane；
It arranges that 4 eddy current displacement sensors are fixedly connected with lathe bed, the Thermal Error of workbench is obtained, in XZ planar radial
2 displacement sensor S are arranged in direction2And S4, 2 displacement sensor S are placed equidistant in YZ planar radial direction1And S3, obtain rolling
The Thermal Error of tooth machine worktable, wherein S1With S3And S2With S4Distance is L=200mm.
The main temperature sensor is arranged in hobboing cutter spindle motor shell, hobboing cutter axle bearing, coolant liquid inlet/outlet pipe, lathe
At the heat-sensitive components such as big column, table motor shell, workbench side, lathe bed and environment temperature and measurement measuring point temperature
Degree, the auxiliary temperature sensors are arranged in table surface, work piece holder etc. with the position of worktable rotary.
Precision machine tool main shaft performance test system proposed by the present invention has real-time temperature collection and displacement, automatic guarantor
The function of deposit data has stronger anti-interference ability, high-precision and extremely strong expansion capability；Develop the temperature of multichannel and more
The synchronization detection system of channel Thermal Error, the synchro measure of the two miss the changing rule of research thermal characteristic of machine tools to heat is disclosed
Difference and temperature between relation of interdependence and Thermal Error along lathe Z-direction distribution important in inhibiting.Relative displacement measurement
Method can not only measure the hot pitch angle of radial direction and radial hot deflection angle of workbench, can also measure hobboing cutter and feed along Z axis
In the process, to Y-direction Thermal Error, the Thermal Error changing rule for research gear-hobbing machine provides more the X between hob head and workpiece
For test data direct, accurate, abundant.
Calculate pitch angle
Deflection angle
L3 0Displacement sensor S when-original state3Radial distance between main shaft；L1 0Displacement sensor when-original state
S1Radial distance between main shaft；L1 iDisplacement sensor S in-main shaft operational process1Transient state radial displacement between main shaft；
L3 iDisplacement sensor S in-main shaft operational process3Transient state radial displacement between main shaft；D is sensor S1With S3Between distance.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Protection scope in.
Claims (8)
1. a kind of Thermal Error measuring system of lathe, which is characterized in that the measuring system includes at least one displacement sensor
(1), displacement signal conditioning module (2), data acquisition controller (4), main control computer (6) and at least one main temperature sensor
(10)；
The displacement signal of at least one displacement sensor acquisition is transmitted to institute after the processing of institute's displacement signal conditioning module
State data acquisition controller；The output signal of the data acquisition controller is transferred to the main control computer；
The temperature signal of at least one main temperature sensor acquisition is transmitted to the master control through the data acquisition controller
Computer processed.
2. an a kind of Thermal Error measuring system for lathe according to claim 1, which is characterized in that the data acquisition control
Device processed includes temperature signal collection module (7) and voltage acquisition module (3), the temperature signal collection module and described at least one
A main temperature sensor connection；The analog voltage acquisition module is electrically connected with institute's displacement signal conditioning module.
3. a kind of Thermal Error measuring system of lathe according to claim 2, which is characterized in that the measuring system further includes
At least one auxiliary temperature sensors (9), is electrically connected with the temperature signal collection module, and the temperature signal collection module is adopted
The data of collection are transferred to the main control computer.
4. a kind of Thermal Error measuring system of lathe according to claim 3, which is characterized in that the temperature signal collection
The output signal of module and the output signal of the analog voltage acquisition module are transmitted to the main control computer through gateway (5).
5. a kind of Thermal Error measuring system of lathe according to claim 2, which is characterized in that the temperature signal collection
Module uses 3 line RTD modes and 24 analog-digital converters；The voltage acquisition module uses 16 analog-digital converters, and 8 channels are same
Step acquisition.
6. the method that a kind of Thermal Error measuring system of lathe described in Claims 1 to 5 any one carries out Thermal Error measurement,
It is characterized in that, this method are as follows:
With table spindle to for Z-direction, the direction of hobboing cutter forward or backward is Y direction, both perpendicular to Y direction and Z
Axial direction is X-axis；
Respectively arrange 1 eddy current displacement sensor in XZ planar radial and YZ planar radial, for obtain hobboing cutter and workbench it
Between Thermal Error；
2 eddy current displacement sensors are being placed equidistant in XZ planar radial direction, equidistant placement 2, YZ planar radial direction
Eddy current displacement sensor, for obtaining the Thermal Error of platen.
7. a kind of method for measuring thermal error of lathe according to claim 6, it is characterised in that: the main control computer is real
When obtain Z axis position, the Thermal Error measured in conjunction with current vortex describes the Thermal Error between hobboing cutter and workbench along the distribution of Z axis.
8. a kind of method for measuring thermal error of lathe according to claim 6, it is characterised in that: the temperature sensor is set
It sets in hobboing cutter spindle motor shell, hobboing cutter axle bearing, coolant liquid inlet/outlet pipe, the big column of lathe, table motor shell, work
At platform side, lathe bed heat-sensitive component and table surface, work piece holder are with the position of worktable rotary, environment temperature, survey
Measuring point temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811538981.XA CN109623490A (en) | 2018-12-14 | 2018-12-14 | A kind of the Thermal Error measuring system and method for lathe |
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| CN201811538981.XA CN109623490A (en) | 2018-12-14 | 2018-12-14 | A kind of the Thermal Error measuring system and method for lathe |
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Citations (7)
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| CN101797704A (en) * | 2009-12-31 | 2010-08-11 | 重庆大学 | Method for thermal deformation error compensation of digital control gear hobbing machine |
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| CN101797704A (en) * | 2009-12-31 | 2010-08-11 | 重庆大学 | Method for thermal deformation error compensation of digital control gear hobbing machine |
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| CN105094053A (en) * | 2014-05-22 | 2015-11-25 | 山东理工大学 | Machine tool thermal error modeling method based on ant colony neural network |
| CN105397560A (en) * | 2015-12-22 | 2016-03-16 | 重庆大学 | Thermal deformation error compensation method for dry-cutting numerically-controlled gear hobbing machine tool and workpieces |
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Application publication date: 20190416 |