CN108917552B - On-site measurement system and method for workpiece surface profile - Google Patents
On-site measurement system and method for workpiece surface profile Download PDFInfo
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- CN108917552B CN108917552B CN201810765399.0A CN201810765399A CN108917552B CN 108917552 B CN108917552 B CN 108917552B CN 201810765399 A CN201810765399 A CN 201810765399A CN 108917552 B CN108917552 B CN 108917552B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
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Abstract
本发明公开了一种工件表面轮廓在位测量系统及方法，其中，系统包括：位移测量模块，包括两个位移传感器,用于测量被测量工件表面轮廓的变化量；固定支撑模块，包括两个测量臂，用于夹持位移传感器，以使位移传感器垂直工件表面沿所述被测量工件轴线方向滑动；数据采集模块，用于获取被测量工件表面轮廓的变化量；数据处理模块，用于根据被测量工件表面轮廓的变化量得到被测量工件的当前轮廓，并实时存储被测量工件的当前轮廓。该系统测量过程简单快捷，测量精度高且价格低廉，安装方便且开放性好。
The present invention discloses an in-situ measurement system and method for the surface profile of a workpiece, wherein the system comprises: a displacement measurement module, comprising two displacement sensors, for measuring the variation of the surface profile of the workpiece to be measured; a fixed support module, comprising two measuring arms, for clamping the displacement sensor, so that the displacement sensor slides perpendicular to the workpiece surface along the axis direction of the workpiece to be measured; a data acquisition module, for obtaining the variation of the surface profile of the workpiece to be measured; a data processing module, for obtaining the current profile of the workpiece to be measured according to the variation of the surface profile of the workpiece to be measured, and storing the current profile of the workpiece to be measured in real time. The system has a simple and fast measurement process, high measurement accuracy and low price, and is easy to install and has good openness.
Description
Technical Field
The invention relates to the technical field of mechanical measurement, in particular to a workpiece surface profile in-situ measurement system and method.
Background
For shaft workpieces with surface profile accuracy requirements, measuring surface profile accuracy after machining is essential. Currently, there are two main methods for measuring the surface profile of a workpiece, namely in-situ measurement and off-line measurement. In-situ measurement refers to the measurement of the surface profile of a workpiece without leaving the machine tool, using the machine tool's own measurement system. The measuring method has the advantages of high measuring speed, no need of disassembling and assembling workpieces during measurement, limited measuring precision, difficult extraction of original data, poor system openness and incapability of synchronous measurement with other processing state signals (processing vibration, power signals and the like). Moreover, the workpiece surface profile measuring system of the machine tool is expensive, so that the common machine tool does not have the workpiece surface profile measuring system. Off-line measurements the workpiece is mounted on a special surface profiler to make surface profile measurements. The measuring mode has high precision, but the measuring time is long, and the instrument is expensive. For large-sized workpieces, measurements with a surface profiler are generally not available. Therefore, the in-situ measuring system for the surface profile of the workpiece, which is low in cost, convenient to install and good in openness, is developed and has important significance in the field of machining.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, one purpose of the invention is to provide an in-situ measuring system for the surface profile of a workpiece, which has the advantages of simple and rapid measuring process, high measuring precision, low cost, convenient installation and good openness.
Another object of the invention is to propose a method for in-situ measurement of the surface profile of a workpiece.
To achieve the above object, in one aspect, an embodiment of the present invention provides an in-situ measurement system for a surface profile of a workpiece, including: the displacement measurement module comprises two displacement sensors and is used for measuring the variation of the surface profile of the measured workpiece; the fixed support module comprises two measuring arms and is used for clamping the two displacement sensors so that the two displacement sensors slide along the axis direction of the measured workpiece perpendicular to the surface of the workpiece; the data acquisition module is used for acquiring the variation of the surface profile of the measured workpiece; and the data processing module is used for obtaining the current profile of the measured workpiece according to the change amount of the surface profile of the measured workpiece and storing the current profile of the measured workpiece in real time.
According to the workpiece surface profile on-site measuring system, the two displacement sensors are clamped by the two measuring arms and slide along the axis direction of the measured workpiece perpendicular to the surface of the workpiece, the current profile of the measured workpiece is obtained through the collected variation of the surface profile of the measured workpiece and stored in real time, and the workpiece surface profile on-site measuring system has the advantages of being simple and rapid in measuring process, high in measuring precision, low in price, convenient to install and good in openness.
In addition, the workpiece surface profile in-situ measurement system according to the above embodiment of the invention may further have the following additional technical features:
further, in one embodiment of the present invention, the measuring portions of the two displacement sensors are extended and contracted according to the change in the surface profile of the measured workpiece to obtain the amount of change in the surface profile of the measured workpiece.
Further, in one embodiment of the present invention, the two measuring arms include: the base is used for being magnetically adsorbed on the machine tool and stretched and fixed in any direction.
Further, in an embodiment of the present invention, the workpiece surface profile in-situ measurement system further includes: and the power supply module is used for supplying power.
Further, in one embodiment of the present invention, the two displacement sensors are mounted to be in vertical contact with the surface of the workpiece to be measured, and the measuring portions of the two displacement sensors are telescopic with the change of the surface profile of the workpiece to be measured, so as to ensure that the measuring portions can be in close contact with the surface of the workpiece to be measured.
Further, in one embodiment of the present invention, the data processing module is further configured to calculate a roundness of a section of the measured workpiece and a cylindricity of the measured workpiece, and display and save the roundness of the section and the cylindricity of the measured workpiece.
Further, in one embodiment of the present invention, the data processing module calculates the roundness of the section of the measured workpiece, the position of the displacement sensor is fixed at the position of a certain section of the measured workpiece, and the workpiece rotates one revolution.
Further, in one embodiment of the present invention, the data processing module, when calculating the surface profile of the measured workpiece and the cylindricity of the measured workpiece, moves the displacement sensor from one end of the measured workpiece to the other end in the axis direction of the measured workpiece while the measured workpiece rotates.
Further, in one embodiment of the present invention, the two displacement sensors are mounted in the same plane perpendicular to the workpiece axis, and the angle between the two displacement sensors is 90 degrees.
Further, in one embodiment of the invention, the distance between the measuring portions of the two displacement sensors is one quarter of the circumference of the measured workpiece.
In order to achieve the above objective, another embodiment of the present invention provides an in-situ measurement method for a surface profile of a workpiece.
The workpiece surface profile in-situ measurement method provided by the embodiment of the invention comprises the following steps: the two displacement sensors slide along the axis direction of the measured workpiece perpendicular to the surface of the workpiece, and simultaneously rotate the measured workpiece to measure the variation of the surface profile of the measured workpiece; and obtaining the current profile of the measured workpiece according to the change quantity of the surface profile of the measured workpiece, and storing the current profile of the measured workpiece in real time.
According to the workpiece surface profile on-site measurement method, the two displacement sensors are clamped by the two measurement arms and slide along the axis direction of the measured workpiece perpendicular to the surface of the workpiece, and the acquired change quantity of the surface profile of the measured workpiece is used for obtaining the current profile of the measured workpiece and storing the current profile in real time.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a workpiece surface profile in-situ measurement system according to one embodiment of the invention;
FIG. 2 is a flow chart of a method for in-situ measurement of a surface profile of a workpiece in accordance with an embodiment of the invention.
Reference numerals illustrate:
a machine tool 1; a shaft 2; a power supply module 3; a fixed support module 4; a measuring arm 41; a measuring arm 42; a displacement measurement module 5; a displacement sensor 51; a displacement sensor 52; a data acquisition module 6; a data processing module 7; a headstock 11; a bed 12; a pallet 13; a guide rail 14; tail stock 15.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the following, a workpiece surface profile in-situ measurement system and method according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a workpiece surface profile in-situ measurement system according to an embodiment of the invention.
As shown in fig. 1, the workpiece surface profile in-situ measurement system comprises: the device comprises a fixed support module 4, a displacement measurement module 5, a power supply module 3, a data acquisition module 6 and a data processing module 7.
In one embodiment of the invention, in combination with fig. 1, headstock 11, guide rail 14, tailstock 15 are mounted on machine tool 1. The pallet 13 is mounted on the guide rail 14 and can reciprocate on the guide rail 14. The shaft 2 is mounted on the machine tool by means of a headstock 11 and a tailstock 15 and can be rotated by the headstock 11.
Wherein the displacement measuring module 5 comprises a displacement sensor 51 and a displacement sensor 52; the power supply module 3 is connected with the displacement sensor 51 and the displacement sensor 52 and supplies power to the displacement sensor 51 and the displacement sensor 52.
Further, the fixed support module 4 includes a measuring arm 41, a measuring arm 42. The measuring arm 41 is used for clamping the displacement sensor 51, and the measuring arm 41 is provided with a magnetic adsorption base, can be adsorbed on the supporting plate 13 and can reciprocate along with the supporting plate 13. The measuring arm 41 can be extended and fixed in any direction. The measuring arm 42 is used for clamping the displacement sensor 52, and the measuring arm 42 is provided with a magnetic adsorption base, can be adsorbed on the supporting plate 13 and can reciprocate along with the supporting plate 13. The measuring arm 42 can be extended and fixed in any direction.
In one embodiment of the present invention, the displacement sensors 51, 52 are mounted in the same plane perpendicular to the axis of the shaft 2, and the angle between the displacement sensors 51, 52 is 90 degrees.
Further, the distance between the measuring portions of the displacement sensors 51, 52 is one quarter of the circumference of the measured shaft 2.
In one embodiment of the invention, the measuring portions of the displacement sensors 51, 52 are elastically stretchable. The displacement sensor 51 and the displacement sensor 52 are required to be vertically contacted with the surface of the shaft 2 when being installed, and along with the change of the surface profile of the shaft 2, the measuring parts of the displacement sensor 51 and the displacement sensor 52 can stretch out and draw back so as to ensure that the measuring parts can be closely contacted with the surface of the shaft 2. The displacement sensors 51 and 52 are slidable on the surface of the vertical shaft 2.
It will be appreciated that the data acquisition module 6 is connected to the signal output terminals of the displacement sensors 51 and 52, and is configured to acquire output signals of the displacement sensors 51 and 52.
The data processing module 7 is connected with the output end of the data acquisition module 6, and is used for receiving the signals acquired by the data acquisition module 6 and calculating the surface profile of the shaft 2 by using the received signals. The data processing module 7 may store and display the received signals and the calculated surface profile of the shaft 2 in real time.
The data processing module 7 may also calculate the roundness of a certain section of the shaft 2 and the cylindricity of the shaft 2, and display and save the calculated roundness of a certain section of the shaft 2 and cylindricity of the shaft 2.
When the data processing module 7 calculates the roundness of a certain section of the shaft 2, the positions of the displacement sensor 51 and the displacement sensor 52 are fixed at the position of the certain section of the shaft 2 when signals are acquired, and the shaft 2 rotates for one circle.
The data processing module 7 calculates the surface profile of the shaft 2 and the cylindricity of the shaft 2, and the displacement sensor 51 and the displacement sensor 52 move from one end to the other end of the shaft 2 along the axial direction of the shaft 2 when signals are acquired, and the shaft 2 rotates.
According to the workpiece surface profile on-site measuring system, the measuring arm clamps the displacement sensor and slides along the axis direction of the measured workpiece perpendicular to the surface of the workpiece, and the acquired change quantity of the surface profile of the measured workpiece is used for obtaining the current profile of the measured workpiece and storing the current profile in real time.
Next, an in-situ measurement method for a surface profile of a workpiece according to an embodiment of the invention will be described with reference to the accompanying drawings.
FIG. 2 is a flow chart of a method of in-situ measurement of a workpiece surface profile in accordance with one embodiment of the invention.
As shown in fig. 2, the workpiece surface profile in-situ measurement method comprises the following steps:
in step S101, the displacement sensor slides in the direction of the axis of the workpiece to be measured perpendicular to the surface of the workpiece to be measured while rotating the workpiece to be measured to measure the amount of change in the surface profile of the workpiece to be measured.
In step S102, the current profile of the measured workpiece is obtained according to the amount of change in the surface profile of the measured workpiece, and the current profile of the measured workpiece is stored in real time.
It should be noted that the foregoing explanation of the embodiment of the workpiece surface profile in-situ measurement system is also applicable to the workpiece surface profile in-situ measurement method of this embodiment, and will not be repeated herein.
According to the workpiece surface profile on-site measurement method, the displacement sensor is clamped by the measurement arm and slides at will perpendicular to the surface of the workpiece, the current profile of the measured workpiece is obtained through the collected variation of the surface profile of the measured workpiece and stored in real time, and the workpiece surface profile on-site measurement method has the advantages of being simple and quick in measurement process, high in measurement precision, low in cost, convenient to install and good in openness.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (4)
1. A workpiece surface profile in-situ measurement system, comprising:
The machine tool is provided with a guide rail and a supporting plate, and the supporting plate is arranged on the guide rail and can slide along the axis direction of a measured workpiece;
The displacement measurement module comprises two displacement sensors which are used for measuring the variation of the surface profile of the measured workpiece, the two displacement sensors are arranged in the same plane perpendicular to the axis of the measured workpiece, and the angle between the two displacement sensors is 90 degrees;
a fixed support module including two measuring arms for holding the two displacement sensors so that the two displacement sensors vertically contact with the outer surface of the measured workpiece and slide in the axial direction of the measured workpiece, the measuring portions of the two displacement sensors having a distance on the surface of the measured workpiece of one quarter of the circumference of the measured workpiece; the two measuring arms comprise bases, are magnetically adsorbed on the supporting plate, and extend and fix in any direction;
the data acquisition module is used for acquiring the variation of the surface profile of the measured workpiece; and
The data processing module is used for obtaining the current profile of the measured workpiece according to the change amount of the surface profile of the measured workpiece and storing the current profile of the measured workpiece in real time;
The data processing module is also used for calculating the roundness of the section of the measured workpiece and the cylindricity of the measured workpiece, and displaying and storing the roundness of the section and the cylindricity of the measured workpiece;
the data processing module is used for calculating the roundness of the section of the measured workpiece, the positions of the two displacement sensors are fixed at the position of a certain section of the measured workpiece, and the measured workpiece rotates for one circle;
The data processing module calculates the surface profile of the measured workpiece and the cylindricity of the measured workpiece, and the two displacement sensors move from one end of the measured workpiece to the other end along the axis direction of the measured workpiece, and simultaneously the measured workpiece rotates.
2. The workpiece surface profile in-situ measurement system of claim 1, wherein the measurement portions of the two displacement sensors are telescoping in response to changes in the measured workpiece surface profile to obtain an amount of change in the measured workpiece surface profile.
3. The workpiece surface profile in-situ measurement system of claim 1, further comprising:
And the power supply module is used for supplying power.
4. A workpiece surface profile in-situ measurement method, implemented based on a workpiece surface profile in-situ measurement system as claimed in any one of claims 1-3, comprising the steps of:
mounting a supporting plate on a guide rail of a machine tool, wherein the supporting plate can slide along the axis direction of a measured workpiece;
the two measuring arms are magnetically adsorbed on the supporting plate through the base and extend and fix in any direction;
The two measuring arms clamp two displacement sensors, the two displacement sensors vertically contact the surface of the measured workpiece and slide along the axial direction of the measured workpiece, and simultaneously rotate the measured workpiece to measure the variation of the surface profile of the measured workpiece, wherein the two displacement sensors are arranged in the same plane vertical to the axial direction of the measured workpiece, the angle between the two displacement sensors is 90 degrees, and the distance between the measuring parts of the two displacement sensors on the surface of the measured workpiece is one quarter of the circumference of the measured workpiece;
and obtaining the current profile of the measured workpiece according to the change quantity of the surface profile of the measured workpiece, and storing the current profile of the measured workpiece in real time.
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| CN201810765399.0A CN108917552B (en) | 2018-07-12 | 2018-07-12 | On-site measurement system and method for workpiece surface profile |
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| CN201810765399.0A CN108917552B (en) | 2018-07-12 | 2018-07-12 | On-site measurement system and method for workpiece surface profile |
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| KR102204895B1 (en) * | 2019-06-14 | 2021-01-19 | (주)대호테크 | A measurement device and method of an forming device |
| CN110823165B (en) * | 2019-11-19 | 2022-03-25 | 文登恒润锻造有限公司 | Platform, method and device for measuring straightness of forged crankshaft blank and electronic equipment |
| US20220349916A1 (en) * | 2021-05-03 | 2022-11-03 | Optipro Systems, LLC | Nanoscale imaging systems and methods thereof |
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| CN100365384C (en) * | 2005-07-05 | 2008-01-30 | 北京航空航天大学 | Measuring device and method for spherical radius of large rib of inner ring of tapered roller bearing |
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| CN102890475B (en) * | 2012-09-21 | 2015-08-19 | 江苏高精机电装备有限公司 | Large revolving body piece surface profile errors is measured and real-time compensation method |
| CN104613922B (en) * | 2015-02-26 | 2017-08-29 | 中国科学技术大学 | The measuring system and method for a kind of contour of object |
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| US4653196A (en) * | 1984-11-15 | 1987-03-31 | Elgema Gmbh | Device for measuring the profile shape of cylindrical workpiece surfaces |
| CN101354239A (en) * | 2007-07-23 | 2009-01-28 | 鸿富锦精密工业（深圳）有限公司 | Measuring device and measuring method using the measuring device |
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