CN102004021B - Static stiffness testing method for horizontal machining centre - Google Patents
Static stiffness testing method for horizontal machining centre Download PDFInfo
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- CN102004021B CN102004021B CN2010105212662A CN201010521266A CN102004021B CN 102004021 B CN102004021 B CN 102004021B CN 2010105212662 A CN2010105212662 A CN 2010105212662A CN 201010521266 A CN201010521266 A CN 201010521266A CN 102004021 B CN102004021 B CN 102004021B
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Abstract
The invention relates to a static stiffness testing method for a horizontal machining center, which comprises the following steps of: simulating the working state of a main bearing under the action of cutting force when a machine tool works, loading the head of a spindle of the horizontal machining centre through a loader, arranging three detection points on the head of the spindle and the left and right sides of the upper part of a gantry frame, and positioning the spindle at a central position of the gantry frame of the machine tool, and eight limiting positions on the left, right, upper and lower sides and opposite angles of the central position; and detecting deformation values of different parts of the machine tool, arranging the loader on a work bench, reading the magnitude of the loading force by using a measuring cell arranged on the loader, and completing the strain detection by adopting a laser interferometer. The eight-point static stiffness testing method is designed and generated on the basis of a statistical average rule, has high practicability and accuracy, is convenient to operate, has a simple experimental scheme and low requirement on experimental facilities.
Description
Technical field
The present invention relates to a kind of quiet stiffness test method of numerically-controlled machine, especially a kind of quiet stiffness test method of horizontal Machining centers.
Background technology
The quiet rigidity of machining center is to the vibration resistance of system, the limit of stability important influence of the dynamic stiffness of system and autovibration, and then influence the working (machining) efficiency and the surface quality of part.Tell us by Elasticity knowledge: wonder the quiet rigidity of machining center, must apply it must external force, records its corresponding strain under this external force effect, thereby calculate the quiet rigidity of machining center by constitutive equation.For the method for testing of the quiet rigidity of ordinary machine tool, study more deep, but for the quiet rigidity test of numerical control machining center (Fig. 1,2), study less relatively, also desirable without comparison measuring method aspect measuring simultaneously.At present, in the test of the quiet rigidity of portal frame of box structure, the method for testing operability is relatively poor in to case, and test result is not ideal enough.
Summary of the invention
The quiet stiffness test method operability that the present invention is directed to present numerical control machining center is relatively poor; The dissatisfactory shortcoming of test result; Practical structures characteristics in conjunction with box structure machining center in the case; And a kind of quiet stiffness test method of horizontal Machining centers is provided, this method of testing not only can be applied on the horizontal Machining centers with box structure in the case, but also can be applied on the horizontal Machining centers with analog structure.
For realizing above-mentioned purpose, technical scheme of the present invention is:
A kind of quiet stiffness test method of horizontal Machining centers the steps include:
1. main shaft bore the cutting force working condition when simulated machine tool was worked
Through the main shaft handle of a knife imposed load of loader to horizontal Machining centers; And arranged on left and right sides is set up three check points on the top of spindle nose and gantry frame; And main shaft is positioned at one place, center of the gantry frame of lathe; Left, right, up, down, center and diagonal angle eight place's extreme positions
2. detect the deformation values of lathe different parts
Loader is installed on the worktable, and the size of loading force is read through the dynamometer that is installed on the loader, is given off laser beam by laser interferometer; Through being divided into two-way light behind the optical splitter; One road light is returned through the optical splitter back reflection, and another road light is returned by the mirror reflects that is installed in the check point place, and the light beam that two-way reflects at the laser interferometer place produces interference fringe; Under the situation of loaded load; Interference fringe produces light and shade and changes change frequency by rolling counters forward, is converted into the displacement of distortion through computer system, is presented on the screen.
Loader adopts indicator indicating type steel loop dynamometer, and its heap(ed) capacity should confirm that its numerical values recited is read by the dynamometer dial plate according to the actual cut operating mode of machining center; Displacement deformation detect to adopt two-frequency laser interferometer, the height of its installation with should be in same horizontal level with catoptron, to guarantee accurate sending and receiving light.
The invention has the beneficial effects as follows; Rule design that the present invention adopts 9 quiet rigidity test methods to be based on statistical average produces and comes, and has stronger practicality and higher accuracy.
1. this method is for the quiet rigidity of column; Particularly the test of the quiet rigidity of column of big volume is more suitable; Can carry out application of force operation through choosing nine feature locations; Feature locations is generally chosen extreme position and center, owing to chosen nine suitable feature positions, thus well test integrally-built quiet rigidity situation.
In this method the required power that applies by the mobile generation of the worktable of lathe own.Loader is installed on the worktable, and its heap(ed) capacity can be read (on display screen, reading after also can adopting force transducer by Computer Processing) through dynamometry table on the dynamometer, its size depend on worktable amount of movement what.
3. the strain detecting in this method is used two-frequency laser interferometer, because laser has better monochromaticity and coherence, can detect extremely small strain, guarantees precision of test result.
4. this method all has general applicability to the horizontal Machining centers of T-shape structural arrangement; Loaded load power produces through moving of the worktable of lathe own, and is easy to operate, do not need other load to produce equipment; Adopt laser interferometer to detect stress deformation, handle through computer data, show its numerical value by display screen, data read conveniently, strong operability, and accuracy is higher.
Description of drawings
Fig. 1 is the machining center schematic perspective view of box structure in the typical case;
Fig. 2 is the machining center schematic perspective view of typical T-shape structural arrangement;
Fig. 3 is a horizontal Machining centers method for detecting static rigidity synoptic diagram;
Fig. 4 is the charger synoptic diagram;
Fig. 5 is 9 loading position synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
The quiet stiffness test method of horizontal Machining centers of the present invention:
(1) through the spindle nose imposed load of 1 pair of horizontal Machining centers of loader, main shaft bears the cutting force working condition during simulated machine tool work.Set up three check points at spindle nose and gantry frame (column) top and arranged on left and right sides, detect the deformation displacement value of three places after stressed.Given off laser beam by laser interferometer 5, through being divided into two-way light behind the optical splitter 4, one road light is returned through the optical splitter back reflection; Another road light is returned by the catoptron that is installed in the check point place 3; The light beam that reflects at laser interferometer 5 place's two-way produces interference fringe, and under the situation of loaded load, interference fringe produces light and shade and changes change frequency by rolling counters forward; Be converted into the displacement of distortion through computer system 6, be presented on the screen.Referring to Fig. 3, Fig. 4.
(2) for the actual situation of being out of shape man-hour that adds of better prediction lathe meaning travel position in office; When measuring, main shaft is positioned at specific position on the lathe (center left and right; Upper and lower and diagonal angle eight place's extreme positions and center, a place); Recording the deformation values of lathe different parts, thereby can analyze lathe rigidity everywhere accurately, referring to Fig. 5.
Loader 1 adopts indicator indicating type steel loop dynamometer 2, and its heap(ed) capacity should confirm that its numerical values recited is read by the dynamometer dial plate according to the actual cut operating mode of machining center; Displacement deformation detects and adopts two-frequency laser interferometer, and the height of its installation should be in same position with catoptron, to guarantee accurate sending and receiving light.
Claims (2)
1. the quiet stiffness test method of a horizontal Machining centers is characterized in that, the steps include:
Main shaft bore the cutting force working condition when (one) simulated machine tool was worked
Through loader (1) spindle nose of horizontal Machining centers is added load; And arranged on left and right sides is set up three check points on the top of spindle nose and gantry frame; And main shaft is positioned at one place, center of the gantry frame of lathe; Left, right, up, down, center and diagonal angle eight place's extreme positions;
(2) deformation values of detection lathe different parts
Loader (1) is installed on the worktable, and the size of loading force is read through the dynamometer (2) that is installed on the loader (1), is given off laser beam by laser interferometer (5); Through being divided into two-way light behind the optical splitter (4); One road light is returned through optical splitter (4) back reflection, and another road light is returned by the catoptron that is installed in the check point place (3), locates the light beam generation interference fringe that two-way reflects in laser interferometer (5); Under the situation of loaded load; Interference fringe produces light and shade and changes change frequency by rolling counters forward, is converted into the displacement of distortion through computer system (6), is presented on the screen.
2. the quiet stiffness test method of horizontal Machining centers according to claim 1; It is characterized in that: loader (1) used in the above-mentioned steps adopts indicator indicating type steel loop dynamometer (2); Its heap(ed) capacity confirms that according to the actual cut operating mode of machining center its numerical values recited is read by the dynamometer dial plate; Displacement deformation detect to adopt two-frequency laser interferometer, the height of its installation with should and catoptron (3) be in same position, to guarantee accurate sending and receiving light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105212662A CN102004021B (en) | 2010-10-27 | 2010-10-27 | Static stiffness testing method for horizontal machining centre |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105212662A CN102004021B (en) | 2010-10-27 | 2010-10-27 | Static stiffness testing method for horizontal machining centre |
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| Publication Number | Publication Date |
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| CN102004021A CN102004021A (en) | 2011-04-06 |
| CN102004021B true CN102004021B (en) | 2012-03-21 |
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| CN2010105212662A Expired - Fee Related CN102004021B (en) | 2010-10-27 | 2010-10-27 | Static stiffness testing method for horizontal machining centre |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158033B (en) * | 2011-12-09 | 2015-08-12 | 大族激光科技产业集团股份有限公司 | A kind of testing arrangement for Digit Control Machine Tool |
| CN103862328B (en) * | 2014-03-14 | 2016-06-22 | 华中科技大学 | The test device of a kind of lathe end three-dimensional Static stiffness and method of testing |
| CN105203342B (en) * | 2014-06-19 | 2017-11-28 | 北京强度环境研究所 | Space conveys piping slow test displacement load realization device |
| CN105181364A (en) * | 2015-07-13 | 2015-12-23 | 济南大学 | Machine tool static rigidity testing system |
| CN108645337B (en) * | 2018-04-27 | 2019-06-11 | 北京理工大学 | A kind of depth inside pipe wall Surface Location Error on-line measurement and compensation method |
| CN111975392B (en) * | 2020-08-18 | 2022-04-12 | 山东理工大学 | Tandem type bidirectional constant machining force workbench for cutting machining |
| CN113960960B (en) * | 2021-12-22 | 2022-03-18 | 沈阳机床(集团)有限责任公司 | Method for testing and analyzing rigidity of semi-closed loop servo feeding system of numerical control machine tool |
| CN116067692B (en) * | 2023-04-06 | 2023-06-16 | 山东普鲁特机床有限公司 | High-speed turning and milling composite machining center performance test bed |
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Effective date of registration: 20160505 Address after: 200433 No. 128 Xiang Yin Road, Shanghai, Yangpu District Patentee after: USTT Technology Transfer Co., Ltd. Address before: 200093 Shanghai military road, Yangpu District, No. 516 Patentee before: University of Shanghai for Science and Technology Patentee before: Shanghai Machine Tool Works No.3 |
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Granted publication date: 20120321 Termination date: 20201027 |
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