CN111545812A - Method for machining large rotating shaft groove based on grating indexing closed-loop detection system - Google Patents
Method for machining large rotating shaft groove based on grating indexing closed-loop detection system Download PDFInfo
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- CN111545812A CN111545812A CN202010259313.4A CN202010259313A CN111545812A CN 111545812 A CN111545812 A CN 111545812A CN 202010259313 A CN202010259313 A CN 202010259313A CN 111545812 A CN111545812 A CN 111545812A
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- rotating shaft
- grating
- groove
- indexing
- machining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/28—Grooving workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
- B23Q15/14—Control or regulation of the orientation of the tool with respect to the work
-
- 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
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
Abstract
The invention discloses a method for processing a large-scale rotating shaft groove based on a grating indexing closed-loop detection system, which comprises the following steps: in the process of milling the groove on the rotating shaft, the angular rotation of the rotating shaft is controlled by the grating indexing device at the transmission end of the rotating shaft. The real-time monitoring of the rotating angle of the rotating shaft is measured by a grating measuring device. The method for processing the large-scale rotating shaft groove based on the grating indexing closed-loop detection system can realize numerical control accurate indexing when the large-scale rotating shaft processes the lower groove, meets the precision requirement of the lower groove indexing, greatly improves the reliability of numerical control indexing processing, avoids the error processing of the groove caused by the fault of a transmission end in the processing process, and improves the processing efficiency.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a technological method for machining a lower wire casing of a large-scale rotating shaft by using a grating indexing closed-loop numerical control detection system.
Background
The length of the rotating shaft body of the large nuclear power generator reaches 8.5m, 60 through-length lower line slots are distributed on the rotating shaft body, the structure of the lower line slots is as shown in figure 1, and the slots are high in symmetrical indexing and size precision.
When the lower wire slot is machined, a disc milling cutter or a rod milling cutter is needed to perform rough milling, semi-finish milling and finish milling according to a specific machining sequence, so that in the machining process, the rotating shaft needs to rotate for many times according to the position of the slot to be machined, and each slot faces the problem of angle precision caused by rotation. The precision of the rotating shaft rotating and indexing device is the key for ensuring the precision of the angle between each lower line groove.
The conventional milling groove indexing method comprises the following steps: one end of the rotating shaft is provided with an index plate for numerical control machining, after each groove is roughly/finely milled, the rotor is moved to the next position to be machined, and a positioning pin is inserted into the index plate for positioning; after each rotation, the marking pin on the other side of the body is used for checking the equally divided groove lines marked before machining, and the actual rotation angle is checked. The indexing accuracy of the positioning method depends on the machining accuracy of the indexing disc and the matching between the positioning pin and the hole, so that the indexing accuracy of the lower wire casing of the rotor is not high. In addition, the machining positioning method has the advantages of complex tool, complex operation and low machining efficiency.
How to realize that the indexing precision of each lower line groove meets the requirement when milling the groove, the prior process method has low precision, complex operation and low processing efficiency, and the processing process method must be improved to improve the indexing precision and the reliability of the lower line groove and simultaneously improve the processing efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for machining a large-scale rotating shaft groove based on a grating indexing closed-loop detection system.
The purpose of the invention is realized by the following technical scheme:
a method for processing a large-scale rotating shaft groove based on a grating indexing closed-loop detection system comprises the following steps: in the process of milling the groove on the rotating shaft, the angular rotation of the rotating shaft is controlled by the grating indexing device at the transmission end of the rotating shaft.
According to a preferred embodiment, the method for machining the large rotating shaft groove further comprises the following steps: in the process of milling the groove on the rotating shaft, the real-time monitoring of the rotating angle of the rotating shaft is measured by a grating measuring device.
According to a preferred embodiment, the method for machining the large rotating shaft groove further comprises the following steps: in the process of milling the groove of the rotating shaft, when the control system controls the transmission end to drive the rotating shaft to rotate by a preset angle alpha, the grating measuring device feeds back the rotation angle alpha 'measured in real time to the control system, and the control system finishes the control of the processing process based on the data relation between alpha and alpha'.
According to a preferred embodiment, when α ═ α ', or the difference between α and α' is within a preset error range, the control system controls the milling cutter to continue to perform the milling groove machining operation.
According to a preferred embodiment, when the difference between α and α' is out of the preset error range, the control system controls the milling cutter to suspend executing the milling groove processing operation, and displays or sends error reporting information to an operator.
According to a preferred embodiment, the grating measuring device is arranged at the driven end of the shaft.
According to a preferred embodiment, the grating graduation device and the grating measuring device are circular gratings.
According to a preferred embodiment, the angular indexing error of the grating indexing means and the grating measuring means is less than 0.5 "and the repeat positioning accuracy is less than 0.1".
The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.
The invention has the beneficial effects that: the method for processing the large-scale rotating shaft groove based on the grating indexing closed-loop detection system can realize numerical control accurate indexing when the large-scale rotating shaft processes the lower groove, meets the precision requirement of the lower groove indexing, greatly improves the reliability of numerical control indexing processing, avoids the error processing of the groove caused by the fault of a transmission end in the processing process, and improves the processing efficiency.
Drawings
FIG. 1 is a schematic structural view of a lower wire chase;
FIG. 2 is a schematic view of the positioning of the milling grooves of the rotating shaft according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that, in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations and positional relationships that are conventionally used in the products of the present invention, and are used merely for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, it should be noted that, in the present invention, if the specific structures, connection relationships, position relationships, power source relationships, and the like are not written in particular, the structures, connection relationships, position relationships, power source relationships, and the like related to the present invention can be known by those skilled in the art without creative work on the basis of the prior art.
Example 1:
the invention discloses a method for machining a large-scale rotating shaft groove based on a grating indexing closed-loop detection system. The method for machining the large-scale rotating shaft groove comprises the following steps: in the process of milling the groove on the rotating shaft, the angular rotation of the rotating shaft is controlled by the grating indexing device at the transmission end of the rotating shaft. Therefore, by the grating indexing device at the transmission end, the indexing during the processing of the rotating shaft groove can meet the precision requirement.
Preferably, the method for machining the large rotating shaft groove further comprises the following steps: in the process of milling the groove on the rotating shaft, the real-time monitoring of the rotating angle of the rotating shaft is measured by a grating measuring device.
Further, the grating measuring device is arranged at the driven end of the rotating shaft, as shown in fig. 2. The grating measuring head at the tail end or the driven end of the rotating shaft is used as feedback to form closed-loop control with set data, so that the risk of error processing caused by rotation failure of a transmission side, relative displacement generated by a clamping position or manual misoperation is avoided.
Preferably, the grating indexing device and the grating measuring device are circular gratings. Further, the angular indexing error of the grating indexing device and the grating measuring device is less than 0.5", and the repeated positioning precision is less than 0.1". Thereby ensuring the precision requirement of the lower slot indexing.
Preferably, the method for machining the large rotating shaft groove further comprises the following steps: in the process of milling the groove of the rotating shaft, when the control system controls the transmission end to drive the rotating shaft to rotate by a preset angle alpha, the grating measuring device feeds back the rotation angle alpha 'measured in real time to the control system, and the control system finishes the control of the processing process based on the data relation between alpha and alpha'.
Further, when the alpha is equal to the alpha ', or the difference value between the alpha and the alpha' is within a preset error range, the control system controls the milling cutter to continue to perform the groove milling operation.
Further, when the difference value between the alpha and the alpha' is out of the preset error range, the control system controls the milling cutter to suspend executing the milling groove machining operation, and displays or sends error reporting information to an operator.
That is, the grating measuring head or the grating measuring device at the tail end feeds back the actually rotated angle of the rotating shaft after controlling the rotating shaft to rotate by the preset angle every time, and the numerical control system can continue to execute the processing program only when the feedback data is equal to the preset angle or the difference value is within the allowable error range, so that the risk of processing error due to the fact that the actually rotated angle of the rotating shaft is not in place due to the problems of system faults and the like is avoided.
The method for processing the large-scale rotating shaft groove based on the grating indexing closed-loop detection system can realize numerical control accurate indexing when the large-scale rotating shaft processes the lower groove, meets the precision requirement of the lower groove indexing, greatly improves the reliability of numerical control indexing processing, avoids the error processing of the groove caused by the fault of a transmission end in the processing process, and improves the processing efficiency.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will. Numerous combinations will be known to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A method for processing a large-scale rotating shaft groove based on a grating indexing closed-loop detection system is characterized by comprising the following steps: in the process of milling the groove on the rotating shaft, the angular rotation of the rotating shaft is controlled by the grating indexing device at the transmission end of the rotating shaft.
2. The method for machining the large rotating shaft groove based on the grating indexing closed-loop detection system according to claim 1, wherein the method for machining the large rotating shaft groove further comprises the following steps: in the process of milling the groove on the rotating shaft, the real-time monitoring of the rotating angle of the rotating shaft is measured by a grating measuring device.
3. The method for machining the large rotating shaft groove based on the grating indexing closed-loop detection system according to claim 2, wherein the method for machining the large rotating shaft groove further comprises the following steps:
in the process of milling the groove on the rotating shaft, when the control system controls the transmission end to drive the rotating shaft to rotate by a preset angle alpha, the grating measuring device feeds back the rotation angle alpha' measured in real time to the control system,
and the control system completes the control of the machining process based on the data relation between alpha and alpha'.
4. The method for machining the large-scale rotating shaft groove based on the grating graduation closed-loop detection system according to claim 3,
and when the alpha is equal to the alpha ', or the difference value of the alpha and the alpha' is within a preset error range, controlling the milling cutter to continuously perform the milling groove machining operation by the control system.
5. The method for machining the large-scale rotating shaft groove based on the grating indexing closed-loop detection system as claimed in claim 3, wherein when the difference value between α and α' is out of the preset error range, the control system controls the milling cutter to suspend the groove milling operation, and displays or sends error reporting information to an operator.
6. The method for machining the slot of the large-scale rotating shaft based on the grating-based indexing closed-loop detection system according to claim 2, wherein the grating measuring device is arranged at the driven end of the rotating shaft.
7. The method for machining the large-scale rotating shaft groove based on the grating-indexing closed-loop detection system according to claim 6, wherein the grating indexing device and the grating measuring device are circular gratings.
8. The method for machining the large-scale rotating shaft groove based on the grating graduation closed-loop detection system as claimed in claim 7, wherein the angular graduation error of the grating graduation device and the grating measurement device is less than 0.5", and the repeated positioning precision is less than 0.1".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010259313.4A CN111545812A (en) | 2020-04-03 | 2020-04-03 | Method for machining large rotating shaft groove based on grating indexing closed-loop detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010259313.4A CN111545812A (en) | 2020-04-03 | 2020-04-03 | Method for machining large rotating shaft groove based on grating indexing closed-loop detection system |
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| CN111545812A true CN111545812A (en) | 2020-08-18 |
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| CN202010259313.4A Pending CN111545812A (en) | 2020-04-03 | 2020-04-03 | Method for machining large rotating shaft groove based on grating indexing closed-loop detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399721A (en) * | 2021-07-01 | 2021-09-17 | 中国航发贵州黎阳航空动力有限公司 | Method for milling squirrel cage window |
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| CN2803608Y (en) * | 2005-04-29 | 2006-08-09 | 东方汽轮机厂 | Working bearing indexing means for wheel slot of turbine rotor |
| CN202305562U (en) * | 2011-06-08 | 2012-07-04 | 中北大学 | Calibration system for rotating shaft and phase difference thereof |
| CN102672537A (en) * | 2012-05-23 | 2012-09-19 | 北京理工大学 | Precise shafting circular grating optical indexing method |
| DE102011076263A1 (en) * | 2011-05-23 | 2012-11-29 | Mitsubishi Electric Corp. | Rotational angle-positioning device for positioning pivot shaft of turning lathe spindle at predetermined angular position, has command value-correction unit correcting command value for angles to determine corrected command value |
| CN103143759A (en) * | 2013-03-18 | 2013-06-12 | 四川长征机床集团有限公司 | Indexing processing device and method of large axle-liked workpiece |
| CN203185065U (en) * | 2013-03-18 | 2013-09-11 | 四川长征机床集团有限公司 | Dividing device of large-scale nuclear power rotor |
| CN107263207A (en) * | 2017-06-21 | 2017-10-20 | 德阳市中恒重工机械有限公司 | The processing method that generator amature, the inserting slot of main shaft utilize numerical control borer and digital-controlled scaling unit |
| CN110514119A (en) * | 2019-09-29 | 2019-11-29 | 河南科技大学 | A kind of gear global error measuring apparatus and method based on double Circular gratings |
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2020
- 2020-04-03 CN CN202010259313.4A patent/CN111545812A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2803608Y (en) * | 2005-04-29 | 2006-08-09 | 东方汽轮机厂 | Working bearing indexing means for wheel slot of turbine rotor |
| DE102011076263A1 (en) * | 2011-05-23 | 2012-11-29 | Mitsubishi Electric Corp. | Rotational angle-positioning device for positioning pivot shaft of turning lathe spindle at predetermined angular position, has command value-correction unit correcting command value for angles to determine corrected command value |
| CN202305562U (en) * | 2011-06-08 | 2012-07-04 | 中北大学 | Calibration system for rotating shaft and phase difference thereof |
| CN102672537A (en) * | 2012-05-23 | 2012-09-19 | 北京理工大学 | Precise shafting circular grating optical indexing method |
| CN103143759A (en) * | 2013-03-18 | 2013-06-12 | 四川长征机床集团有限公司 | Indexing processing device and method of large axle-liked workpiece |
| CN203185065U (en) * | 2013-03-18 | 2013-09-11 | 四川长征机床集团有限公司 | Dividing device of large-scale nuclear power rotor |
| CN107263207A (en) * | 2017-06-21 | 2017-10-20 | 德阳市中恒重工机械有限公司 | The processing method that generator amature, the inserting slot of main shaft utilize numerical control borer and digital-controlled scaling unit |
| CN110514119A (en) * | 2019-09-29 | 2019-11-29 | 河南科技大学 | A kind of gear global error measuring apparatus and method based on double Circular gratings |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399721A (en) * | 2021-07-01 | 2021-09-17 | 中国航发贵州黎阳航空动力有限公司 | Method for milling squirrel cage window |
| CN113399721B (en) * | 2021-07-01 | 2022-06-03 | 中国航发贵州黎阳航空动力有限公司 | Method for milling squirrel cage window |
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Application publication date: 20200818 |