CN202656009U - Part processing accuracy online detection system facing numerically controlled lathe - Google Patents
Part processing accuracy online detection system facing numerically controlled lathe Download PDFInfo
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- CN202656009U CN202656009U CN 201220370978 CN201220370978U CN202656009U CN 202656009 U CN202656009 U CN 202656009U CN 201220370978 CN201220370978 CN 201220370978 CN 201220370978 U CN201220370978 U CN 201220370978U CN 202656009 U CN202656009 U CN 202656009U
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Abstract
The utility model provides a part processing accuracy online detection system facing a numerically controlled lathe. The detection system comprises a chuck, a workpiece and a lathe detection head, wherein the workpiece is installed on the chuck, the lathe detection head is installed besides the workpiece, and the signal output end of the lathe detection head is connected with a controller of the detection system. A detection method comprises the following steps of: (1) installing the lathe detection head besides the workpiece; (2) calibrating the lathe detection head; (3) planning a measurement path and code generation of a basic geometry part and a curved surface part; and (4) carrying out compensation and processing error analysis on a heat distortion temperature error of a part by the controller of the detection system. According to the utility model, the part processing accuracy online detection system does not need to leave a machine tool after the part is processed, a turning tool is changed into a contacting type detection head, the detection path of the detection head is automatically planned according to a geometric outline and a detection project of a processed workpiece to generate a detection code, and the detection code is driven through a communication interface of the numerically controlled lathe, thus automatically measuring the size, shape and position accuracy of the processed part and improving the detection accuracy and efficiency of the workpiece.
Description
Technical field
The utility model is a kind of part processing precision on-line detecting system of NC Machine lathe, especially a kind of machining accuracy of the revolving parts for having the free curve profile carries out fast detecting, have the on-line detecting system of processing parts on the numerically controlled lathe of automation measuring ability, belongs to the innovative technology of the part processing precision on-line detecting system of NC Machine lathe.
Background technology
Along with the raising of lathe in machining precision and curved profile working ability and perfect, further requirement has been proposed also for accuracy of detection, the detection efficiency of accessory size and contour shape.But in the Process of NC Machining, the detection of part processing precision mainly is to adopt hand dipping or off-line checking method at present, and its detection efficiency is low, detects poor stability, and length consuming time.
Summary of the invention
The purpose of this utility model is to consider the problems referred to above and provides a kind of reasonable in design, the part processing precision on-line detecting system of NC Machine lathe simple in structure.The utility model is easy and simple to handle, can improve the machining accuracy detection efficiency that the numerically controlled lathe batch workpiece is produced.
The technical solution of the utility model is: the part processing precision on-line detecting system of NC Machine lathe of the present utility model, include chuck, workpiece, lathe gauge head, wherein workpiece is installed on the chuck, the lathe gauge head is installed in the side of workpiece, and the signal output part of lathe gauge head is connected with the controller of detection system.
Above-mentioned lathe gauge head adopts touch trigger probe.
The controller of said detecting system is computer.
Compared with prior art, the utlity model has following advantage:
1) the utility model is easy and simple to handle, can automatically generate the gauge head detection and use numerical control code, can improve the machining accuracy detection efficiency that the numerically controlled lathe batch workpiece is produced.
2) the utility model can solve the problem that free curve Profile Parts machining accuracy is difficult to detect, and realizes automatic detection and the error assessment of contour machining precision.
3) the utility model solves that detection technique lags behind and the problem that affects in process of production Product Precision and production efficiency brought, improves the flexibility of production line processing.
The utility model is that a kind of design is ingenious, function admirable, the part processing precision on-line detecting system of convenient and practical NC Machine lathe.
Description of drawings
Fig. 1 be lathe gauge head of the present utility model at x to scheme of installation.
Fig. 2 be lathe gauge head of the present utility model at z to scheme of installation.
Fig. 3 is that the utility model is for the measuring route planing method in straight cylinder hole and the schematic diagram of detection of code generation.
Fig. 4 is that the utility model is for the schematic diagram of free curve Profile Parts measuring route planing method and detection of code generation.
Fig. 5 is online detection schematic diagram of the present utility model.
Fig. 6 is online overhaul flow chart of the present utility model.
In the drawings: 1, chuck, 2～5, workpiece, 6, the lathe gauge head, 7, probe location.
The specific embodiment
Embodiment:
Structural representation of the present utility model is shown in Fig. 1,2,3,4, the technical solution of the utility model is: the part processing precision on-line detecting system of NC Machine lathe of the present utility model, include chuck 1, workpiece, lathe gauge head 6, wherein workpiece is installed on the chuck 1, lathe gauge head 6 is installed in the side of workpiece, and the signal output part of lathe gauge head 6 is connected with the controller of detection system.Workpiece described in the utility model is respectively the workpiece 2～5 that marks among Fig. 1, Fig. 2, Fig. 3, Fig. 4, and workpiece 2～5 is respectively difform part.
Above-mentioned lathe gauge head 6 adopts touch trigger probe.
The detection method of the part processing precision on-line detecting system of the utility model NC Machine lathe comprises the steps:
1) at the side of workpiece lathe gauge head 6 is installed;
2) demarcation of lathe gauge head 6;
3) measuring route of planning basic body part and curved surface part and code generate;
4) controller of detection system compensates the Part Thermal Deformation temperature error and carries out Error analysis of machining.
Above-mentioned steps 1) method of lathe gauge head 6 is installed as follows: the probe location 7 of lathe gauge head 6 is arranged on X axis and Z radially, X axis be tool axis to, Z radially is knife rest radially.
Above-mentioned steps 2) scaling method of lathe gauge head 6 is as follows:
21) at first go out a size with the lathe tool finish turning and can accurately measure the annulus of concentric inner circle or concentric cylindrical as demarcating annulus;
22) internal diameter that measure to demarcate annulus and external diameter and initial accurate measured value are compared draw error;
23) X-direction of obtaining lathe gauge head 6 is from negative correction value t1 and run-out modification value e1 when just moving; The X-direction of obtaining lathe gauge head 6 is being from just to negative correction value t2 and run-out modification value e2 when mobile, and it is write out in the machine tool error compensation, compensates when machine tool motion.
Above-mentioned steps 3) method of the measuring route of planning basic body part and curved surface part is as follows in, because the part of lathe in machining is revolving body, measuring route is as long as plan at two dimensional surface, trigger the principle of measuring by normal direction, according to the position of the pattern detection point that obtains, the measured surface direction of normal in the measured place, automatically generate measuring route;
31) for standard primitives, the detection of straight cylinder hole internal diameter, the measurement key element is diameter of bore, obtain parts measurement initial with the terminating point coordinate, the input diameter of bore needs sampled point number and velocity variations point height, automatically generates the measurement numerical control code;
32) for the part with free curve profile, each point curvature is different on the profile, detect the sampled point direction of normal also different, when generating detection of code, utilize the AutoCAD instrument to obtain the vertical line that detects sampled point, wherein measure the vertical line end points, the measuring point coordinate can obtain by crawl acquisition or automatic traversal, gauge head velocity transformation point coordinates is by calculating apart from workpiece contact point height L that the operator sets, and establishing the velocity transformation point coordinates is (Z
T, X
T), in obtaining the pattern detection point process, obtain simultaneously gauge head rectilinear motion peak (11) and minimum point (12) is respectively (Z
n, X
n) and (Z
N-1, X
N-1), simultaneous equations
With
, wherein,
, calculate velocity transformation point coordinates (Z
T, X
T), generation detection path 11 → 12 → 13 → ... → 21 → 22.
Above-mentioned steps 4) method that in the Part Thermal Deformation temperature error is compensated is as follows:
Because the online part temperature that detects is higher, can cause the DATA REASONING deviation, therefore need to carry out precomputation to the heat distortion amount of part, measurement result is compensated, concrete grammar is as follows:
Calculation expression for processing column axial workpiece heat distortion amount has:
, wherein, D
0, h
0For the diameter of cylinder axial workpiece, highly, α is material thermal expansion coefficient,
Be the temperature difference before and after the processing,
, ρ is density of material, E
0Initial elastic modulus, α
EBe the temperature coefficient of elastic modelling quantity, if the volume of cylinder axis is V before the variations in temperature
0, after temperature changed, the physical dimension of axle changed, and its diameter, length are respectively D
1And h
1, and
, the volume of variations in temperature rear axle is V
1, because the coefficient of cubical expansion
, therefore have
, in measured value analytical calculation process, this thermal deformation errors value complement is repaid in measured processing parts diameter, obtain the actual value of part under operating temperature;
Above-mentioned steps 3) in, for the point that occurs interfering or colliding, adopting increases the method that transition point is crossed interference point when test point is set.
Above-mentioned steps 4) in, also there are flatness, circularity, the multinomial mismachining tolerance of axiality such as part, the controller of detection system is by obtaining the measured value that the lathe gauge head returns from the RS232 interface, then measured value is carried out flatness or the processing of axiality data, determine flatness, circularity, the coaxiality error of measurand.
In this example, the controller of said detecting system is computer.
Operation principle of the present utility model is as follows: the purpose of this utility model is that numerically controlled lathe and contact-type detection are combined, developed towards the on-line automatic monitoring system of lathe processing parts, solved the rapid automatized test problems of part to be processed on the numerically controlled lathe.This system is after the part manufacturing procedure is finished, directly lathe tool is replaced by contact measuring head, geometric profile and test item according to work piece, automatically plan the detection path of gauge head, generate detection of code, by with the communication interface of numerically controlled lathe, drive detection of code, realize the automatic measurement of part to be processed size and the accuracy of form and position, thereby improve accuracy of detection and the efficient of processing work.
Concrete function of the present utility model comprises:
1. select the measurement code generating mode that is fit to according to the geometric properties of part: detect and generate towards the detection path of Free-form Surface Parts towards the basic macroprogram of geometric properties.
2. according to project and the required precision of piece test, the parameter of setting measurement system.
3. system plans that automatically gauge head detects the path, generates to detect and uses numerical control code.
4. detect path and detection of code by the RS232 communication interface, realize the communication of detection system and CNC system for lathe.
5. the measured value that returns is carried out the error calculation and evaluation, obtain the machining accuracy of geometric properties and curved profile part, the output measurement report.
6. the heat distortion amount of part to be processed carried out precomputation, and measurement result is compensated.
In addition, also there is multinomial mismachining tolerance in part.The utility model by obtaining the measured value that the lathe gauge head returns from the RS232 interface, then carries out flatness or the processing of axiality data to measured value by computer, can determine flatness, circularity, the axiality equal error of measurand.
The utility model is towards different parts and feature, realization towards the detection of code of geometric properties and the different test items of free curve profile automatically generate, the function such as measurement point data feedback, error analysis report generation and thermal distortion compensation, its concrete testing process is as shown in Figure 6.
Claims (3)
1. the part processing precision on-line detecting system of a NC Machine lathe, it is characterized in that including chuck (1), workpiece (2～5), lathe gauge head (6), wherein workpiece (2～5) is installed on the chuck (1), lathe gauge head (6) is installed in the side of workpiece (2～5), and the signal output part of lathe gauge head (6) is connected with the controller of detection system.
2. the part processing precision on-line detecting system of NC Machine lathe according to claim 1 is characterized in that lathe gauge head (6) adopts touch trigger probe.
3. the part processing precision on-line detecting system of NC Machine lathe according to claim 1, the controller that it is characterized in that said detecting system is computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220370978 CN202656009U (en) | 2012-07-30 | 2012-07-30 | Part processing accuracy online detection system facing numerically controlled lathe |
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| CN 201220370978 CN202656009U (en) | 2012-07-30 | 2012-07-30 | Part processing accuracy online detection system facing numerically controlled lathe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785128A (en) * | 2012-07-30 | 2012-11-21 | 广东工业大学 | On-line detection system and detection method of machining accuracy of parts for numerically controlled lathe |
| CN107433493A (en) * | 2016-05-27 | 2017-12-05 | 中村留精密工业株式会社 | Work piece processing method, main shaft angle means for correcting and compound lathe |
| CN108459557A (en) * | 2017-07-26 | 2018-08-28 | 华中科技大学 | Dimension Measurement evaluating method |
| CN113600995A (en) * | 2021-08-06 | 2021-11-05 | 大连理工大学 | Manufacturing equipment and method for ion beam polishing atoms for in-situ shape detection of quartz hemispherical harmonic oscillator |
-
2012
- 2012-07-30 CN CN 201220370978 patent/CN202656009U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785128A (en) * | 2012-07-30 | 2012-11-21 | 广东工业大学 | On-line detection system and detection method of machining accuracy of parts for numerically controlled lathe |
| CN102785128B (en) * | 2012-07-30 | 2016-01-20 | 广东工业大学 | The part processing precision on-line detecting system of NC Machine lathe and detection method |
| CN107433493A (en) * | 2016-05-27 | 2017-12-05 | 中村留精密工业株式会社 | Work piece processing method, main shaft angle means for correcting and compound lathe |
| CN107433493B (en) * | 2016-05-27 | 2021-07-27 | 中村留精密工业株式会社 | Workpiece machining method, spindle angle correction device, and compound lathe |
| CN108459557A (en) * | 2017-07-26 | 2018-08-28 | 华中科技大学 | Dimension Measurement evaluating method |
| CN108459557B (en) * | 2017-07-26 | 2021-11-19 | 华中科技大学 | Part machining size evaluation method |
| CN113600995A (en) * | 2021-08-06 | 2021-11-05 | 大连理工大学 | Manufacturing equipment and method for ion beam polishing atoms for in-situ shape detection of quartz hemispherical harmonic oscillator |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |