CN102759579B - Test block for testing sound transmission performance of axles - Google Patents
Test block for testing sound transmission performance of axles Download PDFInfo
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- CN102759579B CN102759579B CN201110106228.5A CN201110106228A CN102759579B CN 102759579 B CN102759579 B CN 102759579B CN 201110106228 A CN201110106228 A CN 201110106228A CN 102759579 B CN102759579 B CN 102759579B
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- groove
- test block
- sound absorption
- transmission performance
- axles
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- 238000012360 testing method Methods 0.000 title claims abstract description 67
- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 229910052721 tungsten Inorganic materials 0.000 claims 1
- 239000010937 tungsten Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910002114 biscuit porcelain Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of test block for testing sound transmission performance of axles, belong to rolling stock detection technique field. This test block has the block of cuboid, and four sides that described block extends are along its length shaped with respectively the next-door neighbour's groove extending along its length, and are with length direction the uniform sound absorption groove that X-shaped intersects; In described groove and sound absorption groove, fill after metal dust, surface coverage has coat. Adopt after the present invention, can substantially eliminate test block side to hyperacoustic reflection, thereby improve the degree of accuracy of axletree entrant sound testing result.
Description
Technical field
The present invention relates to a kind of rolling stock parts Non-Destructive Testing apparatus, especially a kind of test block for testing sound transmission performance of axles, belongs to rolling stock detection technique field.
Background technology
The test of axletree sound translative performance is a kind of method of the ultrasonic wave penetrability reflection axletree interior tissue situation by test axletree. The Chinese patent application file that its test philosophy can be 99201174.4 referring to application number. In the time carrying out this test, need to be taking reference block as benchmark, by relatively drawing test result.
Existing standard test block is simple in structure, by forming with the metal derby of material with axletree. But, applicant's discovery in the time carrying out precision measurement, the offside reflection ripple of this reference block also can be reflected on tester, thereby affects test result. Retrieval finds, name is called Chinese patent that " standard test block of no-damage testing ", application number are 200720100284.7 and discloses a kind of test block of multidiameter shape. The test of the inapplicable axletree of this test block, does not provide the method for eliminating back wave yet.
Summary of the invention
The object of the invention is to: the problem existing for above-mentioned prior art, proposes a kind of test block for testing sound transmission performance of axles that can substantially eliminate offside reflection ripple, thereby improve the degree of accuracy of axletree entrant sound testing result.
In order to reach above object, test block for testing sound transmission performance of axles of the present invention has the block of cuboid, and four sides that described block extends are along its length shaped with respectively the groove extending along its length, and are with length direction the sound absorption groove that X-shaped intersects; In described groove and sound absorption groove, fill metal dust.
When test, the groove of test block side and sound absorption groove make to incide ultrasonic wave multiple reflections in groove of test block side, and every secondary reflection metal dust that all some energy is filled absorbs. After multiple reflections, the ultrasonic energy major part that incides test block side is absorbed by side, reflexes to energy in test block few, has therefore obviously reduced the interference to test result, thereby has improved the degree of accuracy of test.
The present invention further improves: the cross section of described groove and/or sound absorption groove is V-arrangement, fills metal dust rear surface and be coated with coat in groove. When filling, conventionally tungsten powder and putty are evenly mixed, brush is in groove, until fill up groove and and sound absorption groove, finally surface brush paint covering again. Cross section is that groove and/or the sound absorption groove of V-arrangement can be realized the multiple reflections of ultrasonic wave in side, and manufacture craft is convenient and simple; The coat of surface coverage facilitates taking of test block, metal dust is had to certain protective effect simultaneously. It is substantial smooth that putty can make tungsten powder fill in groove and sound absorption groove, is uniformly distributed.
Due to the metal powder material of selecting acoustic characteristic impedance substantially to mate with ultrasonic probe wafer acoustic characteristic impedance, (acoustic characteristic impedance of conventional ultrasonic probe wafer is 20～30 × 106kg/m2S, it is generally acknowledged that material acoustic characteristic impedance is coupling between 0.5～1.5 times of wafer acoustic characteristic impedance), now metal dust has higher acoustical absorptivity. Because the damping absorbability of pulverous metal pair sound wave is very strong, the acoustic wave energy that therefore enters metal bisque is absorbed very soon, thereby reaches acoustically effective again. Through test, while adopting 100～200 object tungsten powder, ultrasonic acoustic absorption coefficient is the highest, the strongest to the absorbability of ultrasonic energy, can reach best effects.
Theory and practice proves, the A/F of best described groove is 1 ± 0.1 millimeter, now groove interior reflective surface width is 1/2～1 times of conventional frequency ultrasonic wave wavelength, thereby make test block both there is the groove interior reflective surface of sufficient amount, there is again comparatively reasonably reflecting surface width, thereby the ultrasonic wave of horizontal proliferation is produced to desirable groove internal reflection effect. Sound absorption channel opening width is 1 ± 0.5 millimeter, and spacing is 10 ± 1 millimeters, can produce desirable groove internal reflection effect to a small amount of longitudinal diffusion ultrasonic wave like this. The spacing of sound absorption groove is too small, distribute overstockedly, can reduce test block side length direction groove reflecting surface, through test, better to the erasure effect of longitudinal diffusion acoustic beam when sound absorption separation is 10mm left and right.
The cross section of described groove and sound absorption groove is V-arrangement, and the base angle of V-arrangement is preferably 60 °. Base angle is excessive, and length direction ditch groove width is and shallow, and groove internal reflection effect is bad; Base angle is too small, and groove is close and dark, makes inconvenience. 60 ° of base angles had both made groove internal reflection satisfactory for result, and processing technology is convenient simultaneously. And easily make acoustic beam laterally or longitudinal diffusion incide test block side ultrasonic wave in groove through multiple reflections, fully absorbed by metal powder. And the groove of the each side of test block of the present invention and sound absorption groove connect mutually, therefore formed sound absorption network structure, can fully absorb acoustic wave energy, produce very good noise elimination effect, thereby substantially eliminate test block side to hyperacoustic reflection, greatly improve the degree of accuracy of axletree sound translative performance test result.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is the structural representation (intectate state) of one embodiment of the invention.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the partial enlarged drawing of Fig. 2.
Fig. 4 is the partial enlarged drawing of the embodiment of the present invention two.
Detailed description of the invention
Embodiment mono-
The test block for testing sound transmission performance of axles of the present embodiment as shown in Figures 1 to 3, block 1 is the cuboid steel identical with axletree material, four sides of extending are along its length shaped with respectively the next-door neighbour's groove 1-1 extending along its length, its cross sectional shape is 60 °, the base angle V-arrangement that forms surface saw tooth ripples, A/F is 1 millimeter, and the both sides and the opening edge that form V-arrangement form equilateral triangle. The middle part of each side has lost direct reflecting surface completely, and limit portion leaves narrower safe edge 1-4. In addition, each side is shaped with respectively the X-shaped that is 45 ° of angles of cut with length direction and intersects uniform sound absorption groove 1-2, and the A/F of sound absorption groove is also 1 millimeter, and spacing is 10 millimeters, its cross sectional shape is also 60 °, base angle V-arrangement, and both sides and the opening edge of formation V-arrangement also form equilateral triangle. . The tungsten powder 1-5 that fills 150 orders (100 order～200 orders all can) in groove 1-1 and sound absorption groove 1-2, surface applies paint 1-3 as covering coat, and metal tungsten powder is remained in groove. Next-door neighbour's groove and uniform sound absorption groove can play and make the ultrasonic wave energy that incides test block side play the absorbed effect of energy. (next-door neighbour's groove and uniform sound absorption groove make to incide the ultrasonic wave of each position, test block side can be in groove multiple reflections. )
The results showed again, because the metal powder acoustic impedance of filling in groove and sound absorption groove is mated with ultrasonic probe wafer acoustic impedance, therefore there is good acoustic energy absorption effect, the groove of the each side of test block and sound absorption groove have formed sound absorption network structure, no matter laterally or after the acoustic beam incident of longitudinal diffusion all in groove when multiple reflections, energy is fully absorbed by metal tungsten powder, thereby effectively eliminates test block side to hyperacoustic reflection, significantly improves the degree of accuracy of axletree entrant sound testing result.
Embodiment bis-
The test block for testing sound transmission performance of axles basic structure of the present embodiment is identical with embodiment mono-, difference is that block left and right both ends of the surface footing is that the vee-cut of 60 ° is unsymmetric structure, form V-arrangement two domatic in, one domatic and angle test block side is to be less than the acute angle (being preferably 55 °-45 °) of 60 °, and another domatic and angle test block side are to be greater than the acute angle (being preferably 65 °-75 °) of 60 °. Like this, when multiple reflections after acoustic beam incident, tester is exerted an influence hardly, thus the degree of accuracy that improves axletree entrant sound testing result.
Embodiment tri-
The test block for testing sound transmission performance of axles basic structure of the present embodiment is identical with embodiment mono-, and difference is that the vee-cut of block is unsymmetric structure, and V-arrangement disappear sound absorption groove be symmetrical structure.
Embodiment tetra-
The test block for testing sound transmission performance of axles basic structure of the present embodiment is identical with embodiment mono-, and difference is that the vee-cut of block is symmetrical structure, and V-arrangement disappear sound absorption groove be unsymmetric structure.
In addition to the implementation, the present invention can also have other embodiments. All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1. a test block for testing sound transmission performance of axles, has the block of cuboid, and four sides that described block extends are along its length shaped with respectively the mutual next-door neighbour's groove extending along its length, and are with length direction the uniform sound absorption groove that X-shaped intersects; In described groove and sound absorption groove, fill metal powder, the metal powder acoustic impedance of filling in described groove and sound absorption groove is mated with ultrasonic probe wafer acoustic impedance; Described metal powder is granularity 100～200 object tungsten powders; The cross section of described groove and sound absorption groove is V-arrangement, fills metal powder rear surface and be coated with coat in groove; The base angle of described V-arrangement is 60 °.
2. test block for testing sound transmission performance of axles according to claim 1, is characterized in that: the two domatic limits and the opening edge that form described V-arrangement form equilateral triangle.
3. test block for testing sound transmission performance of axles according to claim 2, is characterized in that: the A/F of described groove is 1 ± 0.1 millimeter; Described sound absorption channel opening width is 1 ± 0.5 millimeter, and spacing is each other 10 ± 1 millimeters.
4. test block for testing sound transmission performance of axles according to claim 3, is characterized in that: described tungsten powder and putty evenly mix and fills up described groove and sound absorption groove, and described coat is skin of paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110106228.5A CN102759579B (en) | 2011-04-27 | 2011-04-27 | Test block for testing sound transmission performance of axles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110106228.5A CN102759579B (en) | 2011-04-27 | 2011-04-27 | Test block for testing sound transmission performance of axles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102759579A CN102759579A (en) | 2012-10-31 |
| CN102759579B true CN102759579B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110106228.5A Active CN102759579B (en) | 2011-04-27 | 2011-04-27 | Test block for testing sound transmission performance of axles |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051094Y (en) * | 2007-04-09 | 2008-04-23 | 山东济宁模具厂 | CSK-IA testing block |
| CN101509899A (en) * | 2009-03-18 | 2009-08-19 | 天津市电力公司 | Ultrasonic detecting method for electric power pylon steel angle |
| CN201392328Y (en) * | 2009-04-22 | 2010-01-27 | 济宁瑞祥模具有限责任公司 | High-pressure mainstay ceramic insulator and insulator ultrasonic-wave fault-detection standard test block |
| CN202159042U (en) * | 2011-04-27 | 2012-03-07 | 南车戚墅堰机车车辆工艺研究所有限公司 | Test block for testing sound transmission performance of axles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101163554B1 (en) * | 2010-11-08 | 2012-07-06 | 삼성중공업 주식회사 | Calibration block for phased-array ultrasonic inspection and verification |
-
2011
- 2011-04-27 CN CN201110106228.5A patent/CN102759579B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051094Y (en) * | 2007-04-09 | 2008-04-23 | 山东济宁模具厂 | CSK-IA testing block |
| CN101509899A (en) * | 2009-03-18 | 2009-08-19 | 天津市电力公司 | Ultrasonic detecting method for electric power pylon steel angle |
| CN201392328Y (en) * | 2009-04-22 | 2010-01-27 | 济宁瑞祥模具有限责任公司 | High-pressure mainstay ceramic insulator and insulator ultrasonic-wave fault-detection standard test block |
| CN202159042U (en) * | 2011-04-27 | 2012-03-07 | 南车戚墅堰机车车辆工艺研究所有限公司 | Test block for testing sound transmission performance of axles |
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| Publication number | Publication date |
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| CN102759579A (en) | 2012-10-31 |
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Address after: 213011 Wuyi Road, Jiangsu, Changzhou, No. 258 Applicant after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 81, No. Applicant before: CSR QISHUYAN INSTITUTE Co.,Ltd. |
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Effective date of registration: 20190724 Address after: 213000 Wuyi Road, Jiangsu, Changzhou, No. 258 Co-patentee after: China Railway Inspection and Certification (Changzhou) Locomotive and Vehicle Parts Inspection Station Co.,Ltd. Patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Jiangsu, Changzhou, No. 258 Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |
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Address after: 213000, No. 258, Wuyi Road, Changzhou City, Jiangsu Province Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Country or region after: China Patentee after: China Railway Inspection and Certification (Changzhou) Locomotive and Vehicle Parts Inspection Station Co.,Ltd. Address before: 213000, No. 258, Wuyi Road, Changzhou City, Jiangsu Province Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. Country or region before: China Patentee before: China Railway Inspection and Certification (Changzhou) Locomotive and Vehicle Parts Inspection Station Co.,Ltd. |