CN1008248B - Sequential prediction error-compensating apparatus for multi-spindle machine tool - Google Patents
Sequential prediction error-compensating apparatus for multi-spindle machine toolInfo
- Publication number
- CN1008248B CN1008248B CN 85102868 CN85102868A CN1008248B CN 1008248 B CN1008248 B CN 1008248B CN 85102868 CN85102868 CN 85102868 CN 85102868 A CN85102868 A CN 85102868A CN 1008248 B CN1008248 B CN 1008248B
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- China
- Prior art keywords
- error
- workpiece
- processing
- machine tool
- compensating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Automatic Control Of Machine Tools (AREA)
Abstract
The present invention has a fundamental principle that the processing dimension of each part is measured by an automatic measurement instrument in the process of processing parts. The dimension is stored into a microcomputer after A/D conversion, and is formed into a time sequence. Besides, a mathematical model representing various system errors and random errors is the process of processing parts is established. The formed mathematical model is used to forecast the most possible error value of the next processing part, and drive a compensation cutter frame for compensation.
Description
Invention belongs to the automatic control and the compensation field of machine tool.
Though gang tool is highly efficient in productivity, but because in process, exist many errors (as transposition, tool wear, thermal deformation, lathe wearing and tearing and random error), so machining accuracy is more much lower than general fine turning lathe, thereby the bigger scope of application that limits gang tool.But it is higher that numerous parts often has only one, two dimension precision requirement actually, if being set, the automatic compensating cutting tool carriage of an On-line Control eliminates its most of error on corresponding station, just can improve the machining accuracy of part greatly, therefore enlarge the range of application of gang tool.
In order to improve the machining accuracy of gang tool, West Germany Ji Demei company (Gildemeister) the seventies later stage is provided with automatic compensating cutting tool carriage on horizontal six-spindle bar automatic lathe.It has measurement mechanism and control device.Its method is to measure position shifter error when new machine dispatches from the factory, and once mixes up, and in use can not change.Can't adjust when lathe uses the actual position shifter error in back to change, mismachining tolerance is bigger.When the error accumulation of tool wear is adjusted once when to a certain degree exceeding maximum value or minimum value again, thereby error is also bigger.Other error can not compensate.
It is a kind of error-compensating apparatus with checkout gear and A/D converter to United States Patent (USP) (US-4214191, open day 1980,7,22).It is by turret head, the measuring instrument of measuring workpieces, the automatic administrative unit of cutter life, A/D and D/A converter, servomotor, compositions such as tool offset accumulator.This patent is the cutter life automated management system, detects the tool wear in the processing automatically.Determine the tool offset amount according to the tool wear situation, make the tool feeding position compensation, and just simple accumulation tool wear value, when accumulated value reaches the value of pre-determining, change cutter.This method can only detect automatically to the part of present processing and compensation automatically, and it can not forecast the mismachining tolerance that may occur in the next part processing, and proposes compensation.
Wisconsin-Madison university adopts forecasting method of time series, and compensation is because machine tool chief axis and off-centre of device own or the caused main shaft Radial Motion Error of deviation from circular from value in cylindrical grinder processing.
Task of the present invention provides a kind of new equipment that adopts time series forecasting error compensation on gang tool.It can constantly measure each part processing size automatically in process, and can forecast the error that next processing work most probable produces, eliminate its most of error by the automatic compensating cutting tool carriage of the On-line Control that is provided with on the gang tool, improve the machining accuracy of part greatly, enlarge the range of application of gang tool.
The present invention has designed a kind of sequential prediction error-compensating apparatus for multi-spindle machine tool.It has Workpiece detecting device, A/D converter, calculation control device, electric supply installation and compensating cutting tool carriage.Workpiece detecting device is by camshaft (1), gage outfit (4), and electromagnetic pneumatic reversal valve (5), inductance amesdial (6) and travel switch (12,13) are formed.Calculation control device is the processing dimension of storage each workpiece that Workpiece detecting device is surveyed, and constitutes a time sequence, gives the microcomputer (9) of the issuable error amount of the next processing parts of newspaper according to this sequential.Electric supply installation is made up of power supply (11), power amplifier (10).Compensating cutting tool carriage has stepper motor (2).
The processing dimension of on-line automatic each part of measurement in the process becomes numeral with this size and is stored in the microcomputer and constitutes a time series after A/D conversion.Utilize the theory of time series analysis then, set up the Mathematical Modeling of various systematic errors and random error in the representative processing.The Mathematical Modeling that utilize to constitute just can be given the error amount that the next processing parts most probable of newspaper produces, and is issued an order by microcomputer and to drive automatic compensating cutting tool carriage and compensate, thereby makes the mismachining tolerance of next workpiece reduce to minimum.
Compensation arrangement of the present invention is by camshaft (1), stepper motor (2), workpiece (3), gage outfit (4), electromagnetic pneumatic reversal valve (5), inductance amesdial (6), dc amplifier (7), A/D conversion equipment (8), microcomputer (9), power amplifier (10), power supply (11), travel switch (12,13) is formed.Automatically compensating cutting tool carriage is placed in the main carriage of III station, and when turning finished, the buting iron depression stroke switch (12) on the camshaft (1) made gage outfit (4) F.F. by magnetic valve (5).When gage outfit advanced to extreme position, depression stroke switch (13) sends signal made computer (9) sample, and makes gage outfit return the home position by magnetic valve simultaneously.Behind the computer sampling, send signal immediately and make compensating cutting tool carriage do the motion of micro-cutter relieving, in order to avoid knife rest scratches polished surface when returning.Constantly with the gage outfit (4) of automatic measuring instrument, measure the processing dimension of each part successively in the processing, computer carries out the compensation rate that newspaper calculated and determined knife rest of giving of next workpiece size according to time series then.When finishing, realizes the main carriage rewind down compensation and the feed of knife rest.This method can be eliminated position shifter error to greatest extent, cutter and lathe wear error, and thermal deformation errors and other random error minimize workpiece machining error, thereby can enlarge the range of application of gang tool.
Claims (1)
- A kind of sequential prediction error-compensating apparatus for multi-spindle machine tool, has Workpiece detecting device, A/D converter, calculation control device and electric supply installation and compensating cutting tool carriage, it is characterized in that Workpiece detecting device is by camshaft [1], gage outfit [4], electromagnetic pneumatic reversal valve [5], inductance amesdial [6] and travel switch [12,13] form, this calculation control device is the processing dimension of storage each workpiece that Workpiece detecting device is surveyed, and constitutes a time sequence, forecast the microcomputer [9] of the issuable error amount of next processing parts according to this sequential, its electric supply installation is by power supply [11], and power amplifier [10] is formed, and compensating cutting tool carriage has stepper motor [2].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102868 CN1008248B (en) | 1985-04-01 | 1985-04-01 | Sequential prediction error-compensating apparatus for multi-spindle machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102868 CN1008248B (en) | 1985-04-01 | 1985-04-01 | Sequential prediction error-compensating apparatus for multi-spindle machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102868A CN85102868A (en) | 1986-09-10 |
| CN1008248B true CN1008248B (en) | 1990-06-06 |
Family
ID=4792818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85102868 Expired CN1008248B (en) | 1985-04-01 | 1985-04-01 | Sequential prediction error-compensating apparatus for multi-spindle machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008248B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3792266B2 (en) * | 1994-06-16 | 2006-07-05 | 森精機興産株式会社 | Method and apparatus for correcting thermal displacement of machine tool |
| CN101196498B (en) * | 2006-12-06 | 2011-06-01 | 中国科学院计算技术研究所 | Method for predicting mass spectrum mass measurement error |
| CN103659465B (en) * | 2012-09-21 | 2016-03-09 | 财团法人工业技术研究院 | compensation control method for multi-axis machine |
| CN109283890B (en) * | 2018-11-20 | 2023-11-03 | 东莞市义信精密模具科技有限公司 | Automatic thermal error compensation device for numerical control machine tool supporting plate |
| CN111624944B (en) | 2020-06-16 | 2023-09-08 | 富联裕展科技(深圳)有限公司 | Cutter control device and method |
| CN112059726B (en) * | 2020-08-31 | 2022-05-24 | 西安精雕精密机械工程有限公司 | On-machine measurement and compensation processing method of workpiece with multiple reference characteristics |
-
1985
- 1985-04-01 CN CN 85102868 patent/CN1008248B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85102868A (en) | 1986-09-10 |
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