CN108445833B - Intelligent track correction system and method in finish machining - Google Patents
Intelligent track correction system and method in finish machining Download PDFInfo
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- CN108445833B CN108445833B CN201810209929.3A CN201810209929A CN108445833B CN 108445833 B CN108445833 B CN 108445833B CN 201810209929 A CN201810209929 A CN 201810209929A CN 108445833 B CN108445833 B CN 108445833B
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- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
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Abstract
The correction system at least comprises an operation interface, a detection module, a correction module, a processing module and a storage module, wherein the storage module is connected to the operation interface, the detection module, the correction module and the processing module, the correction module is connected to the processing module, the storage module can comprise a motion track generation part, the processing module comprises a control information generation part and a driving signal transmission part, the detection module comprises a detection unit and a signal processing unit for detecting the track of a cutter, and the correction module at least comprises a correction unit for generating correction data and providing the correction data for the control information generation part of the processing module for data compensation.
Description
Technical Field
The invention relates to the technical field of fine machining, in particular to an intelligent track correction system and method in fine machining.
Background
Today, numerically controlled machines have replaced completely or gradually the usual machines in a considerable field, the process of machining parts of which is carried out completely automatically, without manual intervention during the machining process. Therefore, all information of the workpiece to be machined, including a technological process, a tool motion track and a feeding direction, a displacement, technological parameters (a spindle rotation speed, a feeding amount and a cutting depth), auxiliary actions (tool changing, speed changing, cooling, clamping and loosening) and the like, must be firstly compiled into a correct numerical control machining program according to a machining sequence by adopting standard or specified program instructions, then the program instructions are input into a control system of a numerical control device, and then the control system controls the numerical control machine to machine the part according to the requirements of the numerical control program. In the numerical control machining, due to the change of the track in the machining process, the actual machining track can be deviated, when the deviation amount reaches a certain value, the qualified rate of the machined product cannot meet the requirement, and particularly in the precision machining (such as national defense material machining, engine rotor crankshaft machining and the like), the machining precision is easy to reduce and the machining requirement is not met.
Therefore, in view of the above-mentioned drawbacks, the present inventors have conducted extensive research and design to overcome the above-mentioned drawbacks by designing and developing an intelligent track correction system and method for finishing work, which combines the experience and results of related industries for many years.
Disclosure of Invention
The invention aims to provide an intelligent track correction system and method in finish machining, which can overcome the defects of the prior art, intelligently control a machining track and effectively improve the machining precision.
In order to solve the problems, the invention discloses an intelligent track correction system in finish machining, which at least comprises an operation interface, a detection module, a correction module, a machining module and a storage module, wherein the storage module is connected to the operation interface, the detection module, the correction module and the machining module, and the correction module is connected to the machining module, and is characterized in that:
the storage module may include a motion trajectory generation unit that generates and stores a machining motion trajectory of the tool from an input machining trajectory, and the machining module includes a control information generation unit that generates trajectory data of the tool in three axis directions and a drive signal transmission unit that transmits a drive signal;
the detection module comprises a detection unit and a signal processing unit, the detection unit comprises a motor angle detector, the motor angle detector is used for detecting the rotation angle of the driving motor, the signal processing unit correspondingly comprises a signal processor connected to the angle detector, the correction module at least comprises a correction unit, the correction unit reads processing track data and real-time detection data, the comparison unit is used for comparing and judging, correction data is generated according to the difference between the processing track data and the real-time detection data, and the correction data is provided for a control information generation part of the processing module to perform data compensation.
Wherein: the driving signal transmitting part comprises an X-direction driving signal transmitting part, a Y-direction driving signal transmitting part and a Z-direction driving signal transmitting part, and the X-direction driving signal transmitting part, the Y-direction driving signal transmitting part and the Z-direction driving signal transmitting part respectively transmit track data to an X-axis driving motor, a Y-axis driving motor and a Z-axis driving motor which drive the cutter to move in three directions.
Wherein: the detection unit comprises an X-axis motor angle detector, a Y-axis motor angle detector and a Z-axis motor angle detector which are used for detecting the rotation angle of the driving motor, and the signal processing unit correspondingly comprises an X-axis signal processor, a Y-axis signal processor and a Z-axis signal processor which are respectively connected to the shaft angle detectors.
Wherein: the correction module at least comprises an X-axis correction unit, the X-axis correction unit comprises an X-axis comparison unit and an X-axis correction data generation unit, the X-axis comparison unit respectively reads X-axis track data and X-axis detection information, the X-axis comparison unit compares and judges the X-axis track data and the X-axis detection information, the X-axis correction data generation unit generates X-axis correction data according to the difference value between the X-axis track data and the X-axis detection information, and the X-axis correction data are provided for a control information generation part of the processing module to perform data compensation in the.
Wherein: the correction module at least comprises a Y-axis correction unit, the Y-axis correction unit comprises a Y-axis comparison unit and a Y-axis correction data generation unit, the Y-axis comparison unit is used for respectively reading Y-axis track data and Y-axis detection information, comparing and judging the Y-axis track data and the Y-axis detection information, the Y-axis correction data generation unit is used for generating Y-axis correction data according to the difference value between the Y-axis track data and the Y-axis detection information, and the Y-axis correction data are provided for a control information generation part of the processing module to perform data compensation in the.
Wherein: the correction module at least comprises a Z-axis correction unit, the Z-axis correction unit comprises a Z-axis comparison unit and a Z-axis correction data generation unit, the Z-axis comparison unit respectively reads Z-axis track data and Z-axis detection information, the Z-axis track data and the Z-axis detection information are compared and judged through the Z-axis comparison unit, the Z-axis correction data generation unit generates Z-axis correction data according to a difference value between the Z-axis track data and the Z-axis detection information, and the Z-axis correction data are provided for a control information generation part of the processing module to perform data compensation.
Also discloses an intelligent track correction method in finish machining, which is characterized by comprising the following steps:
the method comprises the following steps: inputting a processing track and generating processing track data in a preset cycle period;
step two: controlling a driving motor to move according to the processing track data in a cycle period;
step three: obtaining real-time track data in each axial direction at the end of the cycle period;
step four: comparing the machining track data with the real-time track data to obtain correction data in each axial direction;
step five: respectively carrying out compensation correction on the track data in each axial direction through the correction data in each axial direction;
step six: and repeating the second step to the fifth step until the processing tracks in all the cycle periods are completely finished.
By the structure, the intelligent track correction system and method in finish machining have the following effects:
1. real-time correction in the processing process is provided, and the processing efficiency and the processing excellent rate are effectively improved;
2. the control is simple and reliable, and the processing information can be monitored at any time in the processing process;
3. the operator can read the control signal and the correction signal from the interface at any time, and know the abnormity in the processing process in time, which is beneficial for the operator to monitor at any time.
The details of the present invention can be obtained from the following description and the attached drawings.
Drawings
FIG. 1 shows a schematic diagram of the intelligent track correction system in finishing according to the present invention.
Fig. 2 shows a schematic diagram of the intelligent track correction method in finishing according to the present invention.
Detailed Description
Referring to fig. 1, the intelligent track correction system in finishing according to the present invention is shown.
The track intelligent correction system in finish machining at least comprises an operation interface, a detection module, a correction module, a machining module and a storage module, wherein the storage module is connected to the operation interface, the detection module, the correction module and the machining module, and the correction module is connected to the machining module.
The control interface can be a touch control interface, and can also be an aggregate of a display screen and a control keyboard, so that the operator can set a processing track and the like of a tool in the process of processing a workpiece through the control interface, and can also display corresponding track information and correction information in the processing process, the storage module can comprise a motion track generating part, and the motion track generating part generates and stores the processing motion track of the tool according to the input processing track.
The processing module is used as a control part for processing, in the common numerical control processing, a cutter can move on at least three axes, therefore, the processing module can comprise a control information generating part, an X-direction driving signal transmitting part, a Y-direction driving signal transmitting part and a Z-direction driving signal transmitting part, the control information generating part reads the processing motion track of the tool stored in the storage module and generates track data (X-axis track data, Y-axis track data and Z-axis track data) of the tool in three axial directions, the track data can be generally divided into different stages according to different processing stages, such as the first movement of the tool, the first feeding, the first retracting, the second movement of the tool, the second feeding, the second retracting, etc., different trajectory data can be generated at each of the different stages corresponding to the stage.
The X-direction driving signal sending part, the Y-direction driving signal sending part and the Z-direction driving signal sending part respectively send track data to an X-axis driving motor, a Y-axis driving motor and a Z-axis driving motor which drive the cutter to move in three directions, so that the cutter can respectively move correspondingly to the control driving motor, and three-dimensional movement of the cutter is realized.
The detection module comprises a detection unit and a signal processing unit, wherein the detection unit can detect the track of the cutter, the detection unit can comprise an X-axis motor angle detector, a Y-axis motor angle detector and a Z-axis motor angle detector which detect the rotation angle of a driving motor, the signal processing unit correspondingly comprises an X-axis signal processor, a Y-axis signal processor and a Z-axis signal processor which are respectively connected to the shaft angle detectors, and each signal processor can comprise a signal amplification part and a filtering part, so that the signals of the shaft detectors are respectively processed to generate X-axis detection information, Y-axis detection information and Z-axis detection information, and thus, three-dimensional real-time detection signals in the track of the cutter are provided.
The correction module at least comprises an X-axis correction unit, a Y-axis correction unit and a Z-axis correction unit, wherein the X-axis correction unit comprises an X-axis comparison unit and an X-axis correction data generation unit which respectively read X-axis track data and X-axis detection information, compare and judge the X-axis track data and the X-axis detection information through the X-axis comparison unit, generate X-axis correction data through the X-axis correction data generation unit according to the difference between the X-axis track data and the X-axis detection information, provide the X-axis correction data to a control information generation part of the processing module for data compensation in the X-axis direction, the Y-axis correction unit comprises a Y-axis comparison unit and a Y-axis correction data generation unit which respectively read Y-axis track data and Y-axis detection information, compare and judge the Y-axis track data and the Y-axis detection information through the Y-axis comparison unit, generate Y-axis correction data through the Y-axis correction data generation, the Z-axis correction unit comprises a Z-axis comparison unit and a Z-axis correction data generation unit, and the Z-axis comparison unit respectively reads Z-axis track data and Z-axis detection information, compares and judges the Z-axis track data and the Z-axis detection information, generates Z-axis correction data according to the difference value between the Z-axis track data and the Z-axis detection information, and provides the Z-axis correction data to a control information generation part of the processing module to perform data compensation in the Z-axis direction.
Therefore, the control signal of the driving motor can be adjusted in real time, the machining precision is better guaranteed, and the storage module stores corresponding data, so that automatic correction in finish machining can be realized through correction and control of the modules.
Therefore, the invention can ensure real-time control and correction in the processing process by simultaneously compensating and correcting the workpiece and the cutter, and can feed back the compensated correction data in time through the control interface, thereby being beneficial to the real-time monitoring of an operator.
The invention also relates to an intelligent track finishing correction method, which can be realized by the intelligent track finishing correction system, and the correction method can comprise the following steps:
the method comprises the following steps: inputting a processing track and generating processing track data in a preset cycle period;
specifically, the trajectory data of the tool in the X, Y, Z axial direction can be generated according to the input machining trajectory, and the trajectory data can be divided according to a predetermined cycle to form the machining trajectory data in each cycle;
step two: controlling a driving motor to move according to the processing track data in a cycle period;
specifically, the trajectory data may be sent to the driving motors in each axial direction (X, Y, Z axes) in a cycle period, and each driving motor may be controlled to realize the trajectory movement in each axial direction in the cycle period;
step three: obtaining real-time track data in each axial direction at the end of the cycle period;
specifically, the movement data in each axial direction (X, Y, Z axes) can be detected to obtain X-axis detection information, Y-axis detection information, and Z-axis detection information, thereby providing three-dimensional real-time trajectory data in the tool trajectory.
Step four: comparing the machining track data with the real-time track data to obtain correction data in each axial direction;
specifically, real-time comparison is performed according to the machining track data and the real-time track data in each axial direction, and correction data in each axial direction is obtained according to a difference value after comparison and an empirical parameter, namely a ═ B-C ═ D, where a is the correction data, B is the machining track data, C is the real-time track data, and D is the empirical parameter, and the empirical parameter is obtained in consideration of the temperature and the machining object.
Step five: respectively carrying out compensation correction on the track data in each axial direction through the correction data in each axial direction;
step six: and repeating the second step to the fifth step until the processing tracks in all the cycle periods are completely finished.
By the method, the whole processing step is divided into a plurality of cycle periods, and real-time correction is carried out in each cycle period, so that the processing smoothness is ensured, and a better correction effect can be provided.
The cycle period may be preset according to a processing track of the tool, for example, the tool should perform multiple cutting processes in sequential processing, each cutting process may be divided into tool movement, tool feeding and tool retracting, and each tool movement, tool feeding and tool retracting may be regarded as one cycle period, and those skilled in the art may understand that the selection of the cycle period is not limited thereto.
Therefore, the invention has the advantages that:
1. real-time correction in the processing process is provided, and the processing efficiency and the processing excellent rate are effectively improved;
2. the control is simple and reliable, and the processing information can be monitored at any time in the processing process;
3. the operator can read the control signal and the correction signal from the interface at any time, and know the abnormity in the processing process in time, which is beneficial for the operator to monitor at any time.
It should be apparent that the foregoing description and illustrations are by way of example only and are not intended to limit the present disclosure, application or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.
Claims (3)
1. The utility model provides a track intelligence correction system in finish machining, is at least including controlling the interface, detecting the module, revising the module, processing module and storage module, storage module is connected to and controls the interface, detects the module, revises the module and processes the module, revise the module and be connected to processing module, its characterized in that:
the storage module can comprise a motion track generating part, the motion track generating part generates and stores a processing motion track of the tool according to the input processing track, the processing module comprises a control information generating part, an X-direction driving signal transmitting part, a Y-direction driving signal transmitting part and a Z-direction driving signal transmitting part, the control information generating part reads the processing motion track of the tool stored in the storage module and generates track data of the tool in three axial directions, the track data is generally divided into different stages according to different processing stages, and different track data can be generated corresponding to the stages in each different stage;
the detection module comprises a detection unit and a signal processing unit, the detection unit comprises a motor angle detector, the motor angle detector is used for detecting the rotation angle of the driving motor, the signal processing unit correspondingly comprises a signal processor connected to the angle detector, the correction module at least comprises a correction unit, the correction unit is used for reading processing track data and real-time detection data, comparing and judging the processing track data and the real-time detection data through the comparison unit, generating correction data according to the difference between the processing track data and the real-time detection data, and providing the correction data for a control information generation part of the processing module to perform data compensation;
the detection unit comprises an X-axis motor angle detector, a Y-axis motor angle detector and a Z-axis motor angle detector which are used for detecting the rotation angle of the driving motor, the signal processing unit correspondingly comprises an X-axis signal processor, a Y-axis signal processor and a Z-axis signal processor which are respectively connected to the shaft angle detectors, the correction module comprises an X-axis correction unit, a Y-axis correction unit and a Z-axis correction unit, the X-axis correction unit comprises an X-axis comparison unit and an X-axis correction data generation unit which are respectively used for reading X-axis track data and X-axis detection information, comparing and judging the X-axis track data and the X-axis detection information through the X-axis comparison unit, generating X-axis correction data through the X-axis correction data generation unit according to the difference value between the X-axis track data and the X-axis correction data, providing the X-axis correction data to a control information generation part of the processing module for data compensation in the X-axis direction, and, the Z-axis correction unit comprises a Z-axis comparison unit and a Z-axis correction data generation unit, the Z-axis comparison unit respectively reads Z-axis track data and Z-axis detection information, the Z-axis correction data generation unit generates Z-axis correction data according to the difference between the Z-axis track data and the Z-axis detection information, the Z-axis correction data generation unit generates the Z-axis correction data according to the difference between the Z-axis track data and the Z-axis detection information, and the Z-axis correction data is provided for the control information generation unit of the processing module to perform data compensation in the Z-axis direction.
2. The system for intelligently correcting a track in finish machining according to claim 1, wherein: the driving signal transmitting part comprises an X-direction driving signal transmitting part, a Y-direction driving signal transmitting part and a Z-direction driving signal transmitting part, and the X-direction driving signal transmitting part, the Y-direction driving signal transmitting part and the Z-direction driving signal transmitting part respectively transmit track data to an X-axis driving motor, a Y-axis driving motor and a Z-axis driving motor which drive the cutter to move in three directions.
3. An intelligent correction method for a track during finish machining of an intelligent correction system for a track during finish machining as claimed in claim 1 or 2, characterized in that the correction method comprises the following steps:
the method comprises the following steps: inputting a processing track and generating processing track data in a preset cycle period;
step two: controlling a driving motor to move according to the processing track data in a cycle period;
step three: obtaining real-time track data in each axial direction at the end of the cycle period;
step four: comparing the machining track data with the real-time track data to obtain correction data in each axial direction;
step five: respectively carrying out compensation correction on the track data in each axial direction through the correction data in each axial direction;
step six: and repeating the second step to the fifth step until the processing tracks in all the cycle periods are completely finished.
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| JP2002312006A (en) * | 2001-04-13 | 2002-10-25 | Mitsubishi Electric Corp | Control device and control system |
| CN102059583B (en) * | 2010-11-10 | 2013-06-26 | 国营险峰机器厂 | Finish machining method for large parts difficult to cut |
| KR101673618B1 (en) * | 2010-12-06 | 2016-11-07 | 두산공작기계 주식회사 | Tool Path Part Program Correction System of NC Machine Tool |
| CN102554690A (en) * | 2010-12-14 | 2012-07-11 | 西安众智惠泽光电科技有限公司 | Fully automatic machine tool for special-shaped structure piece |
| CN102147600B (en) * | 2011-04-30 | 2012-09-19 | 上海交通大学 | Numerical control interpolation system for real-time generation of curvature-continuous path |
| DE102013011941A1 (en) * | 2013-07-17 | 2015-01-22 | The Gleason Works | Method and device for fine machining a toothed workpiece and program for its control |
| CN105108215B (en) * | 2015-07-27 | 2017-04-12 | 华中科技大学 | Method for predicting and compensating cutter back-off error in free-form surface micro milling |
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| CN205111454U (en) * | 2015-10-10 | 2016-03-30 | 郭敏强 | Novel digit control machine tool trajectory control system |
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| CN107608310B (en) * | 2017-10-18 | 2019-11-05 | 中国水利水电第十工程局有限公司 | The temperature compensation system and its method of numerically-controlled machine tool machining spindle |
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