CN104949889A - Whole flexural testing method and device of ultrathin grinding wheel - Google Patents
Whole flexural testing method and device of ultrathin grinding wheel Download PDFInfo
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- CN104949889A CN104949889A CN201510322860.1A CN201510322860A CN104949889A CN 104949889 A CN104949889 A CN 104949889A CN 201510322860 A CN201510322860 A CN 201510322860A CN 104949889 A CN104949889 A CN 104949889A
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Abstract
The invention relates to a whole flexural testing method and a device of an ultrathin grinding wheel. The method comprises the steps that the to-be-tested grinding wheel is horizontally placed; pressure is progressively applied in an axial direction of the to-be-tested grinding wheel; annular flexural force testing is performed; and pressure and displacement of the grinding wheel during fracture are detected. Whole annular flexural testing is performed on the ultrathin grinding wheel, so that the whole flexural performance of the ultrathin grinding wheel can be reflected. In addition, stress of the to-be-tested grinding wheel adopts an annular plane bearing support structure and is closer to annular falling in a using process of the ultrathin grinding wheel, so that evaluation on the whole flexural performance of the ultrathin grinding wheel can be simulated.
Description
Technical field
The present invention relates to the overall anti-folding method of testing of a kind of ultra-thin emery wheel and device.
Background technology
Rupture strength test is the Testing index that the relevant rudimentary such as materialogy, mechanics field is commonly used.Rupture strength basic test method mainly contains cantilever beam type and at present across beam type two kinds of methods, test material is normally made into the bar-shaped sample such as right cylinder or square body according to the requirement of testing tool by its sample, by carrying out the intrinsic mechanical property of test material across the anti-folding of beam or overhanging beam bending test.
As the emery wheel of heterogeneous material, in order to be applicable to the requirement of high-speed grinding, safe handling, the test of examination bar rupture strength can not be simply adopted to carry out the security performance test of alternative finished grinding wheel.For the singularity of emery wheel rupture strength test, in industry, the main test of emery wheel revolving strength and the side impact strength of adopting tests two kinds.The test of emery wheel revolving strength is mainly used in the detection of emery wheel centrifugal intensity, and the test of emery wheel side impact strength is mainly used in cymbals abrasive wheel and fiber enhanced resin cutting grinding wheel carries out the detection of side direction impact resistance, and these are all unsuitable for the test of ultra-thin emery wheel rupture strength.
Ultra-thin Sand wheel has thickness thin (usually at 0.01-1.00mm), uses the features such as rotating speed high (usually at 5000-60000rpm), is mainly used in the accurate scribing of telecommunications industry parts, cutting and grooving.But because emery wheel is thin, intensity is low, in use often there is otch deflection, the technical matterss such as even emery wheel is broken, ring-type comes off.Patent document 201020675792.X, 201420012990.6 etc. solves the test of Ultra-thin Sand wheel abrasive material and basal body binding force well, but the method adopts single-point afterburning, test point random selecting, truly can not reflect the overall spillout technique problem of the ring-type of emery wheel.
Prior art needs a kind of method that can be used for the overall rupture strength test of ultra-thin emery wheel and device of practicality badly.
Summary of the invention
The object of this invention is to provide the overall anti-folding method of testing of a kind of ultra-thin emery wheel and device, in order to solve the deficiency of prior art.
For achieving the above object, the solution of the present invention comprises:
The overall anti-folding method of testing of a kind of ultra-thin emery wheel, comprises the following steps:
1) prepare: according to emery wheel model to be tested, specification, size design make/select suitable planar annular bearing and circular flat pressure head;
2) adjust: emery wheel to be tested is placed on planar annular bearing, cylindrical snap is also positioned over the center of rotating disk together, circular flat pressure head is installed on pressing head seat, moves up and down adjusting seat and make circular flat movable press head to distance emery wheel to predetermined altitude;
3) test: start electric pushrod and press down work, shut down when force sensor measuring value mutation reaches reservation threshold;
4) reset: electric pushrod resets, test terminates, and enters data processing link.
Further, circular flat pressure head is positioned at below pressing head seat, and pressing head seat is positioned at below force snesor, and force snesor is arranged on below electric pushrod, and electric pushrod is arranged on and can moves up and down, below the adjusting seat that adjusts up and down for circular flat pressure head; Emery wheel to be measured is placed on planar annular bearing, and planar annular bearing is placed on rotating disk, and rotating disk is placed on support; Laser displacement sensor is also positioned on rotating disk.
Further, electric pushrod is according to the motion process work of setting, displacement transducer is used for the displacement of automatic tracking and testing circular flat pressure head, and force snesor is for testing the stressed size of emery wheel test process to be measured, and computing machine is used for test data record, process and communication; Described electric pushrod, force snesor are connected with computing machine with displacement transducer.
Present invention also offers the overall anti-folding proving installation of a kind of ultra-thin emery wheel, comprise seaming chuck, the below of described seaming chuck is provided with planar annular bearing, and planar annular bearing is for placing ultra-thin emery wheel to be measured.
Further, the outside dimension of described planar annular bearing is consistent with the external diameter of ultra-thin emery wheel to be measured.
Further, described seaming chuck is coaxial with described planar annular bearing, pressure head plane and annular ledge plane parallel.
Further, described planar annular bearing is the tubular construction that axis extends along the vertical direction, and the upper surface of described planar annular bearing is plane.
Further, described seaming chuck arranges described force snesor, above pressure head, is provided with electric pushrod.
Further, below described annular ledge, be provided with rotating disk, rotating disk also have displacement transducer, organic frame below rotating disk.
Further, described bending test device comprises stand, stand is provided with adjusting seat moving up and down.
The present invention carries out bending test to ultra-thin emery wheel, can reflect the overall fracture resistance of emery wheel.
The stressed employing annular supporting structure of emery wheel to be measured, the annular in use occurred closer to ultra-thin emery wheel comes off truth, is conducive to the overall fracture resistance of the ultra-thin emery wheel of science simulation rational evaluation.
Accompanying drawing explanation
Fig. 1 is that the overall anti-device for folding of a kind of ultra-thin emery wheel implements schematic diagram;
Fig. 2 is pressure head, emery wheel, the annular ledge part-structure figure of Fig. 1;
1. support, 2. rotating disk, 3. planar annular bearing, 4. emery wheel to be measured, 5. circular flat pressure head, 6. pressing head seat, 7. force snesor, 8. electric pushrod, 9. adjusting seat, 10. displacement transducer, 11. measuring staffs, 12. computing machines.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
The overall anti-folding method of testing of a kind of ultra-thin emery wheel, the basic scheme of method is: by emery wheel horizontal positioned to be measured, to grinding wheel spindle to be measured to progressive applying pressure, carries out the test of anti-folding, detects pressure when fractureing.
So, integrated testability can be carried out to emery wheel, solve the defect of prior art bending test.
Further, when applying pressure to emery wheel to be measured, applying pressure at emery wheel zone line to be measured, forming annular brace in emery wheel outer region to be measured.The annular in use occurred closer to ultra-thin emery wheel like this comes off truth, is conducive to the overall fracture resistance of the ultra-thin emery wheel of science simulation rational evaluation.
Bearing can adopt planar annular bearing, or has the bearing of annular support surface.
Pressure head adopts plane pressure head.
The basic scheme of the overall anti-folding proving installation of ultra-thin emery wheel is: comprise seaming chuck, the below of described seaming chuck is provided with planar annular bearing, and planar annular bearing is for placing ultra-thin emery wheel to be measured.
The outside dimension of described planar annular bearing is consistent with the external diameter of ultra-thin emery wheel to be measured.
Described seaming chuck is coaxial with described planar annular bearing, pressure head plane and annular ledge plane parallel.
Described planar annular bearing is the tubular construction that axis extends along the vertical direction, and the upper surface of described planar annular bearing is plane.
Described seaming chuck is provided with pressure transducer, pressure transducer is provided with electric pushrod, electric pushrod is provided with adjusting seat.
Be provided with rotating disk below described annular ledge, rotating disk also have displacement transducer, organic frame below rotating disk.
Described bending test device comprises stand, stand is provided with adjusting seat moving up and down.
Concrete, as shown in Figure 1, circular flat pressure head (corresponding above-mentioned seaming chuck), planar annular bearing, emery wheel to be measured, electric pushrod, force snesor (i.e. pressure transducer), laser displacement sensor, measuring staff, pressing head seat, adjusting seat, rotating disk, support, computing machine etc. are comprised.
Circular flat pressure head is positioned at below pressing head seat, and pressing head seat is positioned at below force snesor, and force snesor is arranged on below electric pushrod, and electric pushrod is arranged on below adjusting seat, and adjusting seat can move up and down; Emery wheel to be measured is placed on planar annular bearing, and planar annular bearing is placed on rotating disk, and rotating disk is placed on support; Laser displacement sensor is also positioned on rotating disk.
The outside dimension of planar annular bearing equals the external diameter of emery wheel to be measured; The diameter of circular flat pressure head can design as the case may be or select.
Electric pushrod, circular flat pressure head, emery wheel to be measured and planar annular bearing are coaxially arranged; Spherical head plane and annular ledge plane parallel.
Electric pushrod, force snesor, displacement transducer and computing machine contact; Electric pushrod can according to control program work, and displacement transducer is used for the displacement of automatic tracking and testing spherical head, and force snesor is for testing the stressed size of emery wheel test process to be measured, and computing machine is used for test data record, process and communication.
Concrete, method of the present invention mainly comprises the following steps:
1) prepare: according to emery wheel model to be tested, specification, size, design and produce or select the circular flat pressure head for exerting pressure, and the planar annular bearing adapted with emery wheel outline to be tested;
2) adjust: emery wheel to be tested is placed on annular ledge, outline align with annular ledge and together be positioned over the center of rotating disk, pressure head and emery wheel to be tested are coaxial correspondingly to be arranged, and makes pressure head move down within emery wheel predetermined altitude to be measured;
3) test: start power supply, emery wheel to be measured pressed downwards by electric pushrod band dynamic head, until emery wheel fractures, records the data such as pressure, displacement simultaneously.
Implement the device of said method as shown in Figure 1 and Figure 2, Fig. 2 is pressure head, emery wheel to be measured and planar annular bearing schematic perspective view.Proving installation comprises circular flat pressure head 5, planar annular bearing 3, emery wheel to be measured 4, electric pushrod 8, force snesor 7, laser displacement sensor 10, measuring staff 11, pressing head seat 6, adjusting seat 9, rotating disk 2, support 1, computing machine 12 etc.
From top to bottom, be followed successively by adjusting seat 9, electric pushrod 8, force snesor 7, pressing head seat 6, circular flat pressure head 5, adjusting seat 9 can move up and down, and moves up and down adjustment for spherical head; Emery wheel to be measured is placed on annular ledge 3, and annular ledge 3 is placed on rotating disk 2, and rotating disk 2 is placed on support 1; Laser displacement sensor 10 is also positioned on rotating disk 2.
The outside dimension of planar annular bearing equals the external diameter of emery wheel to be measured; The diameter of plane pressure head can design as the case may be.Electric pushrod, plane pressure head, emery wheel to be measured and planar annular bearing are coaxially arranged; Spherical head plane and annular ledge plane parallel.
Electric pushrod is according to predetermined control program work, and displacement transducer is used for the displacement of automatic tracking and testing circular flat pressure head, and force snesor is for testing the stressed size of emery wheel test process to be measured, and computing machine is used for test data record, process and communication.
Example 1: the overall fracture resistence force of the ultra-thin emery wheel of test metallic bond 1A8 type D60T0.2H40mm.This emery wheel adopts D50mm flange to install in use.
2. design and make steel circular flat pressure head D50mm, annular ledge D60*H50mm;
2. be placed on planar annular bearing by ultra-thin for D60 emery wheel, cylindrical alignment is also positioned over the center of rotating disk together, adjusts its circle beat within 0.005mm with clock gauge;
3. install D50 circular flat pressure head on pressing head seat, mobile adjusting seat makes spherical head move down within emery wheel 2mm height to be measured;
4. start electric pushrod by preset program work, computer recording displacement transducer, force snesor related data, occur to quit work from electric pushrod when being up to minimum sudden change until pressure;
5. electric pushrod resets, and test terminates;
6. then use computer processing data, the overall fracture resistence force of ultra-thin emery wheel can be obtained.
Example 2: the overall stress and deformation curve of the ultra-thin emery wheel of test metallic bond 1A1R type D150T1.0H40mm.This emery wheel adopts D80mm flange to install in use.
2. count and make steel circular flat pressure head D80mm, annular ledge D150*T60*H140mm;
2. be placed into by D150 emery wheel on D150 planar annular bearing, cylindrical alignment is also positioned over the center of rotating disk together, adjusts its circle beat within 0.01mm with clock gauge;
3. install D80 circular flat pressure head on pressing head seat, mobile adjusting seat makes annular pressure head move down within emery wheel 2mm height to be measured;
4. start electric pushrod by preset program work, computer recording displacement transducer, force snesor related data, in time being displaced to 10mm, electric pushrod quits work;
5. electric pushrod resets, and test terminates;
6. then use computer processing data, the overall stress and deformation curve of ultra-thin emery wheel can be obtained.
The overall anti-folding measuring method of the ultra-thin emery wheel more than provided and device, directly can test inflection curves and the fracture resistance of circular ultra-thin emery wheel, fill up the deficiencies in the prior art.
The error amount provided in above specific embodiment is chosen, and preset height value is chosen, and is all determined by actual conditions, is not limited to above involved occurrence.
Be presented above concrete embodiment, but the present invention is not limited to described embodiment.Basic ideas of the present invention are sheet product planar annular force structure technical scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out embodiment without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (10)
1. the overall anti-folding method of testing of ultra-thin emery wheel, is characterized in that: comprise the following steps:
1) prepare: according to emery wheel model to be tested, specification, size design make/select suitable planar annular bearing and circular flat pressure head;
2) adjust: emery wheel to be tested is placed on planar annular bearing, cylindrical snap is also positioned over the center of rotating disk together, circular flat pressure head is installed on pressing head seat, moves up and down adjusting seat and make circular flat movable press head to distance emery wheel to predetermined altitude;
3) test: start electric pushrod and press down work, shut down when force sensor measuring value mutation reaches reservation threshold;
4) reset: electric pushrod resets, test terminates, and enters data processing link.
2. the overall anti-folding method of testing of ultra-thin emery wheel according to claim 1, it is characterized in that: circular flat pressure head is positioned at below pressing head seat, pressing head seat is positioned at below force snesor, force snesor is arranged on below electric pushrod, and electric pushrod is arranged on and can moves up and down, below the adjusting seat that adjusts up and down for circular flat pressure head; Emery wheel to be measured is placed on planar annular bearing, and planar annular bearing is placed on rotating disk, and rotating disk is placed on support; Laser displacement sensor is also positioned on rotating disk.
3. the overall anti-folding method of testing of ultra-thin emery wheel according to claim 1 and 2, it is characterized in that: electric pushrod is according to the motion process work of setting, displacement transducer is used for the displacement of automatic tracking and testing circular flat pressure head, force snesor is for testing the stressed size of emery wheel test process to be measured, and computing machine is used for test data record, process and communication; Described electric pushrod, force snesor are connected with computing machine with displacement transducer.
4. the overall anti-folding proving installation of ultra-thin emery wheel, comprise seaming chuck, it is characterized in that: the below of described seaming chuck is provided with planar annular bearing, planar annular bearing is for placing ultra-thin emery wheel to be measured.
5. the overall anti-folding proving installation of the ultra-thin emery wheel of one according to claim 4, is characterized in that: the outside dimension of described planar annular bearing is consistent with the external diameter of ultra-thin emery wheel to be measured.
6. the overall anti-folding proving installation of the ultra-thin emery wheel of one according to claim 5, is characterized in that: described seaming chuck is coaxial with described planar annular bearing, pressure head plane and annular ledge plane parallel.
7. the overall anti-folding proving installation of the ultra-thin emery wheel of one according to claim 4, it is characterized in that: described planar annular bearing is the tubular construction that axis extends along the vertical direction, the upper surface of described planar annular bearing is plane.
8. the overall anti-folding proving installation of the ultra-thin emery wheel of one according to claim 4, is characterized in that: described seaming chuck arranges described force snesor, is provided with electric pushrod above pressure head.
9. the overall anti-folding proving installation of the ultra-thin emery wheel of one according to claim 4, is characterized in that: be provided with rotating disk below described annular ledge rotating disk also having displacement transducer, organic frame below rotating disk.
10. the overall anti-folding proving installation of the ultra-thin emery wheel of the one according to claim 4-8 any one, is characterized in that: described bending test device comprises stand, stand is provided with adjusting seat moving up and down.
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| CN201510322860.1A CN104949889A (en) | 2015-06-12 | 2015-06-12 | Whole flexural testing method and device of ultrathin grinding wheel |
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| CN110618040A (en) * | 2019-10-30 | 2019-12-27 | 南京三超新材料股份有限公司 | High-precision ultrathin superhard material cutting grinding wheel bending strength detection device and method |
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Application publication date: 20150930 |