CN201945855U - Thermal error compensating device based on numerical controlling working table - Google Patents
Thermal error compensating device based on numerical controlling working table Download PDFInfo
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- CN201945855U CN201945855U CN2010206242020U CN201020624202U CN201945855U CN 201945855 U CN201945855 U CN 201945855U CN 2010206242020 U CN2010206242020 U CN 2010206242020U CN 201020624202 U CN201020624202 U CN 201020624202U CN 201945855 U CN201945855 U CN 201945855U
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Abstract
The utility model relates to a thermal error compensating device based on a numerical controlling working table, which comprises a serial temperature sensing unit distributed on the numerical controlling working table, a temperature collecting controlling unit connected with the serial temperature sensing unit and an error calculating compensating unit connected with the temperature collecting controlling unit. The thermal error compensating device is characterized in that the temperature sensing unit comprises at least two temperature sensors which are connected to be at least one group and then connected with the temperature collecting controlling unit, and temperature information of each temperature sensor is transmitted to the temperature collecting controlling unit in a digital quantity and time sharing mode. The thermal error compensating device has the advantages of being simple in structure and convenient to connect, and occupying few ports.
Description
Technical field
The utility model belongs to the heat error compensation technical field, relates in particular to the heat error compensation technical field of numerical control table, NC table.
Background technology
Along with the development of precision and Ultraprecision Machining and the automaticity of processing and manufacturing improve constantly, people have higher requirement to the machining precision of numerical control table, NC table.Studies show that in a large number hot error has become the maximum error source of numerical control processing apparatus, therefore become the NC machining device to improve the gordian technique of machining precision hot error Control.Now, we utilize many modes to reduce the hot error of numerical control processing apparatus, and can be divided into two kinds of methods substantially: error prevents method and error compensation method.Error prevents that method relies on the method or direct realization of improving improvement hardware such as numerical control processing apparatus structural design temperature controlling is reduced hot error, this method can reduce thermal source temperature rise, balanced temperature rise to a certain extent and reduce the numerical control processing apparatus thermal deformation is effectively, but it can increase the cost of structural design and manufacturing.Error compensation method is exactly the error estimation that obtains numerical control processing apparatus by analysis modeling, utilizes the diverse ways suitable compensation then, eliminates or reduce the error of system, be a kind of not only effectively but also the means of economic raising numerical control processing apparatus machining precision.So, currently generally adopted convenience, economy and effectively set up the method that hot error model carries out heat error compensation.Error compensation method is a kind of not only effective but also economic means that improve the numerical control processing apparatus machining precision, has become one of important technology pillar of domestic and international modern precision engineering at present.
Be used in now that temperature sensor in the serial temperature sensing unit of heat error compensation system in the production reality is most to be analog sensor, and all be connected with the temperature acquisition control module by parallel form.There is following deficiency in this connected mode: (1) at first, because its temperature sensor of existing heat error compensation technology adopts parallel mode to arrange, each temperature sensor must be connected with the temperature acquisition controller by independent line, so a plurality of temperature sensors and wiring complexity after the temperature acquisition control module is connected.(2) secondly, because its temperature sensor of existing heat error compensation technology adopts analog quantity to transmit, thereby cause the antijamming capability of heat error compensation device to descend, the robustness of error compensation model and versatility are good inadequately; (3) once more, because existing heat error compensation device adopts serial ports to be connected with digital control system, and revise the parameter of system indirectly by the PLC module in the digital control system, because the data rate of serial ports itself is slower, add the temperature detection and the identification time loss of heat error compensation device, make compensation produce hysteresis phenomenon, can not be desirable finish compensation.
The utility model content
The purpose of this utility model is to have proposed a kind of heat error compensation device based on numerical control table, NC table in order to simplify the wiring complexity of serial temperature sensing unit in the existing heat error compensation device.
To achieve these goals, the technical solution of the utility model provides a kind of heat error compensation device based on numerical control table, NC table, comprise the serial temperature sensing unit that is distributed on the numerical control table, NC table, temperature acquisition control module that is connected with the serial temperature sensing unit and the Error Calculation compensating unit that is connected with the temperature acquisition control module, it is characterized in that, described temperature sensing unit comprises at least two temperature sensors, be connected with the temperature acquisition control module after described temperature sensor connects at least one group by serial mode, and transmit separately temperature information respectively to the temperature acquisition control module with the form timesharing of digital quantity.
Many groups structure after the said temperature sensor connects connects by adapter.
The beneficial effects of the utility model are: (1) the utility model is to adopt serial mode to connect a plurality of serial temperature sensing units, can the digital quantity of the temperature information of a plurality of serial temperature sensing units directly be transferred to the temperature acquisition control module by one group of cable, so complexity of simplified wiring, and be easy to increase point for measuring temperature, when numerical control table, NC table point for measuring temperature number changes, the number that only need reset the temperature acquisition point in the temperature acquisition control module just can be finished the temperature detection of different situations, therefore the utlity model has simple in structure, easy to connect, take advantages such as interface is few.(2) serial temperature sensing unit of the present utility model adopts digital quantity to transmit, and has improved the anti-interference of system greatly.The scene temperature that is suitable for rugged surroundings is measured.(3) the utility model is based on the heat error compensation device of single shaft digital-controlled worktable exploitation, and lathe can be regarded the combination of the different worktable of specification as, so this system goes for various high-precision motions, therefore, use versatility of the present utility model is good.(4) Error Calculation compensating unit of the present utility model adopts the Ethernet mode to communicate by letter with communicating by letter of digital control system, compare with the mode of finishing data processing by single-chip microcomputer or PLC in the prior art, communication capacity of the present utility model is stronger, and the correlation parameter of digital control system can directly be visited and revise to the Error Calculation compensating unit by the mode of ethernet communication, and operation is reliable more, quick like this.
Description of drawings
Fig. 1 is a structural principle synoptic diagram of the present utility model.
Fig. 2 is the distribution schematic diagram of numerical control table, NC table point for measuring temperature in the utility model specific embodiment.
Fig. 3 is serial temperature sensing unit and the temperature acquisition control module syndeton synoptic diagram of the utility model embodiment 1.
Fig. 4 is serial temperature sensing unit and the temperature acquisition control module syndeton synoptic diagram of the utility model embodiment 2.
Description of reference numerals: serial temperature sensing unit 1, grounding pin 11, supply voltage pin 12, data line pin 13, temperature sensor 14, temperature acquisition control module 2, data encapsulation module 21, first serial communication interface 22, second serial communication interface 23, Error Calculation compensating unit 3, serial communication interface 31, Ethernet interface 32, heat error compensation computing module 33, error compensation execution module 34, numerical control table, NC table 4, slide block 41, slide block 42, slide block 43, slide block 44, leading screw bearing 45, leading screw bearing 46, feed screw nut 47, work top 48, guide rail 49, worktable bracing frame 410, displacement transducer 411, digital control system 5, Ethernet interface 51, first measuring control point 61, second measuring control point 62, the 3rd measuring control point 63, the 4th measuring control point 64, the 5th measuring control point 65, the 6th measuring control point 66, the 7th measuring control point 67, adapter 7.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Embodiment 1: as shown in Figure 1, a kind of heat error compensation device based on numerical control table, NC table, comprise the serial temperature sensing unit 1 that is distributed on the numerical control table, NC table 4, temperature acquisition control module 2 that is connected with serial temperature sensing unit 1 and the Error Calculation compensating unit 3 that is connected with temperature acquisition control module 2, temperature sensing unit 1 comprises seven temperature sensors 14, temperature sensor 14 is connected with temperature acquisition control module 2 after connecting into one group by serial mode, and transmits separately temperature information with the form timesharing of digital quantity respectively to temperature acquisition control module 2.
Be illustrated in figure 2 as the utility model concrete a kind of scene of using, numerical control table, NC table 4 comprises slide block 41,42,43,44 among the figure, leading screw bearing 45,46, feed screw nut 47, work top 48 (among the figure shown in the dotted line), guide rail 49 and worktable bracing frame 410.Can be slide block 41,42,43,44, leading screw bearing 45,46 and feed screw nut 47 these members respectively as measuring control point 61-67 (because these measuring control points are identical with the position of member 41-47, therefore do not mark among the figure), and on member mounting temperature sensor 14, earlier that ground wire, power lead and data line is corresponding with temperature sensor 14 respectively grounding pin 11, power pins 12 and data line pin 13 are connected, and tie point carried out insulation processing, then temperature sensor 14 is bonded in each measuring control point surface.These measuring control points are the key points that support numerical control table, NC table 4.When numerical control table, NC table turned round, under the synergy of two leading screw bearings 45,46 and feed screw nut 47, leading screw (not drawing among the figure) temperature rose, thereby leading screw is bent; Temperature rise owing to slide block 41,42,43,44 may different cause each slide block deformation difference again, makes work top 48 that deflection may take place; Simultaneously since feed screw nut 47 and leading screw friction generates heat when engagement that temperature is risen, increase friction thereby expand; Comprehensive numerical control table, NC table 4 hot errors as can be known have three translational error and three rotation errors on the coordinate direction.
In the present embodiment, point for measuring temperature 61,62 ..., 67 places the mode of temperature sensor 14 by serial line interface be connected on one group of data bus.Carry out the data message communication by one group of data bus and temperature acquisition control module 2, temperature acquisition control module 2 is visited certain or some temperature sensors 14 by certain protocol, thereby realizes selection of temperature signal.Temperature sensor 14 has three pins, is respectively grounding pin 11, power pins 12 and data line pin 13, and each pin is corresponding respectively to be connected on ground wire, power lead and the data line of cable.Each temperature sensor 14 inside is divided into four parts: sequence number, ram in slice, data-switching and temperature sensing part.Because each temperature sensor 14 all has one only one sequence number, therefore can on one group of data bus, connect a plurality of temperature sensors 14, thereby realize the real-time collection and the signal transmission of a plurality of temperature spots.RAM in the sheet is used for the temporary transient storage of temperature data, promptly is used for internal calculation and data access, and data will be lost when power down or electrification reset.Data-switching is used for will obtaining the temperature signal of digital quantity after temperature sensor 14 obtains switching signal.
In the present embodiment, temperature sensor 14 is connected with temperature acquisition control module 2 with first serial communication interface 22 of bus mode by temperature acquisition control module 2, temperature acquisition control module 2 adopts the controller of AT91SAM7, the position that Error Calculation compensating unit 3 reads today's numerical control worktable 4 in the digital control system 5 by the mode of ethernet communication, the position of worktable 4 is obtained by displacement transducer 411.
With embodiment 1 course of work of the present utility model is described below: in data acquisition, realized the temperature sensor on each measuring control point 14 is monitored in real time by 2 controls of temperature acquisition control module, the temperature signal utilization bus that then temperature sensor 14 is obtained is by first serial communication interface, 22 input temp acquisition controlling unit 2.In compensation process, by the 21 packaged data of data encapsulation module in the temperature acquisition control module 2, be transported in the heat error compensation computing module 33 of Error Calculation compensating unit 3 by second serial communication interface 23 and serial communication interface 31 with the RS232 serial mode, heat error compensation computing module 33 calculates compensation rate by temperature data and numerical control table, NC table 4 position signallings; Read in digital control system 5 numerical control table, NC table 4 current positional value in the mode of Ethernet by Ethernet interface 32 and Ethernet interface 51 with calculation of error compensating unit 3, the positional error compensation of finishing numerical control table, NC table 4 then in Error Calculation compensating unit 3 calculates; Numerical value after will compensating again writes digital control system 5 by the mode of ethernet communication, has finally realized numerical control table, NC table 4 hot real-time error compensation.
The quantity of said temperature sensor 14 can be arranged arbitrarily as required, generally in order to reach result of use, will arrange two at least, usually temperature sensor 14 is arranged in rubbing surface place or thermal deformation key point place.
Embodiment 2: as shown in Figure 4, present embodiment is to be connected by adapter after temperature sensor 14 connects into two groups with the difference of embodiment 1 again.In the present embodiment, first measuring control point 61, second measuring control point 62, the 3rd measuring control point 63 connect into one group by data bus, then the 4th measuring control point 64, the 5th measuring control point 65, the 6th measuring control point 66 are connected other one group by another data bus, by adapter 7 two groups of data buss are coupled together again, be connected on the controller at last.So just can be by the real-time control of a temperature acquisition control module 2 realizations to a plurality of numerical control table, NC tables 4.Above-mentioned adapter 7 has an input adapter, wherein comprises three line ends that are used to connect ground wire, power lead and data line; Have one or more out splice going splices, each out splice going splice comprises and is used to connect three line ends that ground wire, power lead and data line are connected.Therefore can pass through the simultaneous temperature collection of a plurality of deliveries realizations of adapter to a plurality of numerical control table, NC tables 4, complexity that like this can simplified wiring, and be easy to increase the number of point for measuring temperature or numerical control table, NC table 4, when numerical control table, NC table 4 numbers change, only need connect the multi-group data bus by adapter, reset capture program in the temperature acquisition control module 2 then and just can finish the temperature detection of different situations, so just make simple in structure, easy to connect, to take interface few.Fen Zu quantity can be set arbitrarily as required simultaneously.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help reader understanding's principle of the present utility model, should to be understood that protection domain of the present utility model is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from the utility model essence according to disclosed these technology enlightenments of the utility model, and these distortion and combination are still in protection domain of the present utility model.
Claims (2)
1. heat error compensation device based on numerical control table, NC table, comprise the serial temperature sensing unit that is distributed on the numerical control table, NC table, temperature acquisition control module that is connected with the serial temperature sensing unit and the Error Calculation compensating unit that is connected with the temperature acquisition control module, it is characterized in that, described temperature sensing unit comprises at least two temperature sensors, be connected with the temperature acquisition control module after described temperature sensor connects at least one group by serial mode, and transmit separately temperature information respectively to the temperature acquisition control module with the form timesharing of digital quantity.
2. a kind of heat error compensation device based on numerical control table, NC table according to claim 1 is characterized in that, the many groups structure after temperature sensor connects connects by adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206242020U CN201945855U (en) | 2010-11-25 | 2010-11-25 | Thermal error compensating device based on numerical controlling working table |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206242020U CN201945855U (en) | 2010-11-25 | 2010-11-25 | Thermal error compensating device based on numerical controlling working table |
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| CN201945855U true CN201945855U (en) | 2011-08-24 |
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| CN2010206242020U Expired - Fee Related CN201945855U (en) | 2010-11-25 | 2010-11-25 | Thermal error compensating device based on numerical controlling working table |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081377A (en) * | 2010-11-25 | 2011-06-01 | 电子科技大学 | Thermal error compensation device on basis of numerical control workbench |
| CN107511714A (en) * | 2016-06-17 | 2017-12-26 | 崴立机电（苏州）有限公司 | A kind of method for Digit Control Machine Tool temperature rise compensation |
| CN110073297A (en) * | 2017-01-27 | 2019-07-30 | 欧姆龙株式会社 | Slave device, the control method of slave device, host-are from machine control system and message handling program |
-
2010
- 2010-11-25 CN CN2010206242020U patent/CN201945855U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081377A (en) * | 2010-11-25 | 2011-06-01 | 电子科技大学 | Thermal error compensation device on basis of numerical control workbench |
| CN107511714A (en) * | 2016-06-17 | 2017-12-26 | 崴立机电（苏州）有限公司 | A kind of method for Digit Control Machine Tool temperature rise compensation |
| CN110073297A (en) * | 2017-01-27 | 2019-07-30 | 欧姆龙株式会社 | Slave device, the control method of slave device, host-are from machine control system and message handling program |
| US11762359B2 (en) | 2017-01-27 | 2023-09-19 | Omron Corporation | Slave apparatus, control method of slave apparatus, master-slave control system, and recording medium that records information processing program |
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| 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: 20110824 Termination date: 20131125 |