CN102773768B - On-line measurement device for part processing of machine tool - Google Patents
On-line measurement device for part processing of machine tool Download PDFInfo
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Abstract
The invention provides an on-line measurement device for part processing of a machine tool and belongs to the technical field of machining. The on-line measurement device can be used for solving the problems that the size of a part can not be measured when an existing machine tool is used for processing. The measurement device comprises a shooting unit, an image display unit, a marking unit, a measurement unit and a distance display unit, wherein the shooting unit is installed on the machine tool, moves along with a work table of the machine tool, and is used for shooting parts which are static relative to the work table in real time; the image display unit is connected with the shooting unit and is used for displaying the shot images in real time; the marking unit is used for marking a reference coordinate point of the image display unit; the measurement unit is installed on the machine tool, and moves along with the work table, two characteristic points displayed on the image display unit pass through the reference coordinate point due to the movement of the work table, the movement distance of the work table at the moment is measured; and the distance display unit is connected with the measurement unit and is used for displaying the measured distance in a visualization manner, and the distance is the size value of the part needing to be measured. The on-line measurement device has the advantages of high precision and simplicity in operation.
Description
Technical field
The invention belongs to machined field, relate to a kind of measurement mechanism, particularly a kind of on-line measurement device of machine tooling part.
Background technology
Along with the raising that people require product miniaturization, high-performance etc., the required precision of product parts is also more and more higher.If utilize lathe itself, realize higher precision in conjunction with present measuring technique simultaneously, it is a modern machined industry difficult problem to be solved.
Because the cost of lathe is higher, directly can waste larger manpower and materials and financial resources to lathe update, therefore people wish to improve machining accuracy usually under the condition of existing lathe.Such as the Mould Machining of the powder metallurgy parts in automobile absorber, i.e. the valve line of the mould parts such as piston, compression valve seat, compression valve body, usually require that valve line dimensional tolerance suitable for reading is for ± 0.02mm, bottom size tolerance is ± 0.02mm.
Adopt electric spark play, export license wants 3-4, and the precision of size not easily ensures, and valve line is owing to processing through overdischarge, and the loss of electrode all can produce fillet, and it is not very attractive in appearance that valve line is worked it out.And if adopt common lathe process, owing to there is no comparatively ideal checkout gear, be difficult to process the satisfactory product of tolerance by drawing, qualification rate is very low.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of on-line measurement device of machine tooling part.
Object of the present invention realizes by following technical proposal: a kind of on-line measurement device of machine tooling part, and the accessory size of required measurement obtains by the distance of wherein two characteristic points measuring described part, and described on-line measurement device comprises:
Shooting unit, to be arranged on lathe and with the movable workbench of lathe, for carrying out captured in real-time to the part static relative to workbench;
Image-display units, is connected with described shooting unit and is shown in real time by taken image;
Indexing unit, is used for the reference coordinate point of marking image display unit;
Measuring unit, is arranged on described lathe and with movable workbench, the movement of workbench makes described image-display units to show described two characteristic points successively through described reference coordinate point, measures the displacement of now workbench;
Distance display unit, is connected with described measuring unit and distance measured by visual display, and described distance is the accessory size value of required measurement.
In above-mentioned on-line measurement device, described shooting unit comprises ccd video camera.
In above-mentioned on-line measurement device, described shooting unit also comprises the video frequency collection card be connected with described ccd video camera.
In above-mentioned on-line measurement device, described image-display units comprise computer monitor and image digitization that described video frequency collection card is collected be shown as the software processing elements of image.
In above-mentioned on-line measurement device, described indexing unit is cross hairs generator, and the cross hairs that described cross hairs generator generates is positioned at the center of described image-display units.
In above-mentioned on-line measurement device, described measuring unit is grating scale.
In above-mentioned on-line measurement device, described measuring unit comprises along the x-axis grating scale of lathe x-axis traverse measurement and the y-axis grating scale along the traverse measurement of lathe y-axis, and certainty of measurement is 0.001mm.
In above-mentioned on-line measurement device, described distance display unit is the digital display meter be connected with described grating scale.
In above-mentioned on-line measurement device, described machine tooling part is have valve line to realize the valve body sealed, and the accessory size of required measurement is the diameter of each valve line.
In above-mentioned on-line measurement device, the precision of the accessory size of required measurement is not higher than the certainty of measurement of described measuring unit.
Compared with prior art, the present invention utilizes shooting unit and image-display units to make the clear picture of part to be measured be convenient to catch, operating personnel can find the required size characteristic point measured according to image, platen is moved between this characteristic point, and rely on the measuring unit being used for lathe to measure displacement, the size of part can be learnt, there is the advantages such as simple to operate, measurement is accurate, the process-cycle is short.
Accompanying drawing explanation
Fig. 1 is the structural representation of the on-Line Monitor Device of machine tooling part of the present invention;
Fig. 2 is the structural representation of a wherein machine tooling part;
Fig. 3 is the image of part shown in Fig. 2 shown by image-display units.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
The present invention relates to a kind of on-line measurement device of machine tooling part, so-called on-line measurement, namely after part is completed by machine tooling, need not take out or take to laboratory measurement, directly can measure each size of this part on lathe, to judge whether the requirement meeting product size and machining accuracy.Here accessory size is the parameter that directly can characterize the size of part, such as length, diameter, groove depth, groove width etc.Such as measure diameter, the distance by two end points (also namely forming two characteristic points of diameter) measuring a diameter of this part records.Part of the present invention, for valve body, is the required accessory size measured with the valve line sealed of this valve body, the structure of on-line measurement device of the present invention, using method and effect thereof is described.
As shown in Figure 2, its end face has two circle valve lines to the part 6 i.e. structure of valve body, and wherein as shown in the figure, dimensional tolerance suitable for reading is ± 0.02 to the design size of a circle valve line, and bottom size tolerance is ± 0.02.Making the valve body processed meet Design Requirement Drawing, needing the valve line to processing to measure.Because valve line live width is less than 3mm, the survey tools such as slide measure are directly utilized to be difficult to measure accurately; And adopt grating scale, although there is very high precision, how determining starting point and the terminal of measurement, is also a difficult problem.
Given this, the present invention proposes a kind of on-line measurement device of machine tooling part, be used for wherein two characteristic points measuring part distance thus obtain the accessory size that will measure.This measurement mechanism comprises shooting unit 1, image-display units 2, indexing unit 3, measuring unit and distance display unit 5 as shown in Figure 1.
Wherein, shooting unit 1 to be arranged on lathe and with the movable workbench of lathe, for carrying out captured in real-time to the part 6 static relative to workbench.Usually, workbench can move along the x-axis of lathe, y-axis under the drive of the transmission mechanisms such as screw mandrel.Mounting cutter on workbench, is used for processing part 6.Geo-stationary on the Workpiece clamping head that part 6 is fixed on lathe.Shooting unit 1 can be any instrument or equipment that can carry out taking to object imaging, and preferred ccd video camera in the present invention can also be computer camera, digital camera etc. certainly.Certainly, for the ease of the image taken by ccd video camera is proceeded in computer, also need to configure the video frequency collection card be connected with described ccd video camera.
Video frequency collection card transfers image to numerical data and inputs to computer, and these numerical datas are converted into visual image by running corresponding software processing elements by computer, and are shown by computer monitor.Therefore, computer, above-mentioned software processing elements and computer monitor then constitute image-display units 2, are used for and take unit 1 and be connected and shown in real time by taken image.
In order to make, valve line that computer monitor shows is more clear more easily to be recognized, preferably before shooting unit, increase image enlarging unit such as magnifying glass, what shooting unit was collected is the image of valve line after amplifying, so that operator better more easily recognizes suitable for reading, the end opening of valve line from the image shown by computer monitor.
Valve line shown by image-display units 2 as shown in Figure 3, clearly can find out suitable for reading, end opening totally four outline lines of two valve lines and every bar valve line from figure.So, how to measure the size of these four outline lines and judge whether its machining accuracy meets the requirements, just needing indexing unit, measuring unit and the distance display unit that will talk about below relying on.
Indexing unit 3 as shown in Figure 1, Figure 3, be used for the reference coordinate point of marking image display unit 2, this reference coordinate point can be computer monitor or other any suitable any points on display screen of the present invention, as long as shown by this point by certain symbol or figure, and this point is the reference point static relative to display screen.Conventional indexing unit 3 is cross hairs generators, and in the present embodiment, the intersection point P of the cross hairs that cross hairs generator generates is positioned at the center of described image-display units.Certainly, intersection point P also can be positioned at other any points on display screen, can set according to actual needs.
Therefore, when taking unit 1 and moving along x-axis and y-axis along with workbench, taken image also will move on a display screen.If need to measure the size of valve line, only need measure the diameter of four outline lines, with O in scheming
1, O
2an outline line suitable for reading at place is example, measure the diameter of this outline line, only need measure two characteristic points of this outline line of formation, namely at same two end points O diametrically
1, O
2between distance.Travelling table and shooting unit 1, image moves thereupon, makes from end points O
2rise to end points O through reference coordinate point P
1measure the distance of movable workbench around here through P point, the diameter of this outline line can be learnt.
The displacement of above-mentioned workbench, relies on measuring unit to record.In the present embodiment, measuring unit is grating scale, and comprise along the x-axis grating scale 4 of lathe x-axis traverse measurement and the y-axis grating scale 41 along the traverse measurement of lathe y-axis, certainty of measurement is 0.001mm.The mobile terminal of x-axis grating scale 4 is installed on the table, and the mobile terminal of y-axis grating scale 41 is then arranged on x-axis transmission mechanism.
Distance display unit 5 is connected with measuring unit and distance measured by visual display, the accessory size value of measurement needed for described distance is.Here when measuring, as end points O
2overlap with P point, setting now distance is 0; Travelling table makes O
1point overlaps with P point, reads the data on distance display unit 5, gets final product the diameter of the outline line suitable for reading of above-mentioned valve line.
Precision due to grating scale is 0.001mm, and valve line is suitable for reading, bottom size tolerance is ± 0.02mm, therefore, it is possible to whether the machining accuracy measuring this valve line exactly meets Design Requirement Drawing, and in time undesirable part is done over again, thus improve product percent of pass.Therefore, obtain and measure accurately and reach the required precision of expection, obviously, the precision of the accessory size of required measurement can not higher than the certainty of measurement of described measuring unit.In like manner, the present invention not only can be used to measure valve line, also can be used to each size such as height, length, width measuring part.
The present invention utilizes shooting unit and image-display units to make the clear picture of part to be measured be convenient to catch, operating personnel can find the required size characteristic point measured according to image, platen is moved between this characteristic point, and rely on the measuring unit being used for lathe to measure displacement, the size of part can be learnt, there is the advantages such as simple to operate, measurement is accurate, the process-cycle is short.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ the terms such as shooting unit, indexing unit, valve line, machine tooling herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (5)
1. an on-line measurement device for machine tooling part, the accessory size of required measurement obtains by the distance of wherein two characteristic points measuring described part, and it is characterized in that, described on-line measurement device comprises:
Shooting unit, to be arranged on lathe and with the movable workbench of lathe, for carrying out captured in real-time to the part static relative to workbench;
Image-display units, is connected with described shooting unit and is shown in real time by taken image;
Indexing unit, is used for the reference coordinate point of marking image display unit;
Measuring unit, is arranged on described lathe and with movable workbench, the movement of workbench makes described image-display units to show described two characteristic points successively through described reference coordinate point, measures the displacement of now workbench;
Distance display unit, is connected with described measuring unit and distance measured by visual display, and described distance is the accessory size value of required measurement; Described measuring unit is grating scale, described measuring unit comprises along the x-axis grating scale of lathe x-axis traverse measurement and the y-axis grating scale along the traverse measurement of lathe y-axis, certainty of measurement is 0.001mm, valve line is suitable for reading, bottom size tolerance is ± 0.02mm, described machine tooling part is have valve line to realize the valve body sealed, and the accessory size of required measurement is the diameter of each valve line; Described indexing unit is cross hairs generator, and the cross hairs that described cross hairs generator generates is positioned at the center of described image-display units; The precision of the required accessory size measured is not higher than the certainty of measurement of described measuring unit.
2. the on-line measurement device of a kind of machine tooling part according to claim 1, is characterized in that, described shooting unit comprises ccd video camera.
3. the on-line measurement device of a kind of machine tooling part according to claim 2, is characterized in that, described shooting unit also comprises the video frequency collection card be connected with described ccd video camera.
4. the on-line measurement device of a kind of machine tooling part according to claim 3, is characterized in that, described image-display units comprise computer monitor and image digitization that described video frequency collection card is collected be shown as the software processing elements of image.
5. the on-line measurement device of a kind of machine tooling part according to claim 1, is characterized in that, described distance display unit is the digital display meter be connected with described grating scale.
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| CN103009193A (en) * | 2012-12-10 | 2013-04-03 | 成都飞机工业（集团）有限责任公司 | Non-contact three-dimensional on-line measurement system for large structural member |
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| CN104741972A (en) * | 2013-12-27 | 2015-07-01 | 邹永康 | Online machining measuring instrument |
| CH711178A1 (en) * | 2015-06-11 | 2016-12-15 | Watch Out Sa | A machining module, an accessory assembly for a machining module, and a method for starting a machining module. |
| CN105855629B (en) * | 2016-05-25 | 2018-05-08 | 重庆大学 | It is automatic to repair file device and its repair file method |
| CN106584211A (en) * | 2016-12-15 | 2017-04-26 | 上海电气核电设备有限公司 | On-line CCD push-scanning measurement system and measurement method thereof |
| CN109894878A (en) * | 2019-04-09 | 2019-06-18 | 马鞍山瑞恒精密制造有限公司 | Metal iron-clad intelligent manufacturing system with on-line checking function |
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