CN103308143B - Improve the plaster mold frock of acoustic part of automobile sound-absorbing test result reliability - Google Patents
Improve the plaster mold frock of acoustic part of automobile sound-absorbing test result reliability Download PDFInfo
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- CN103308143B CN103308143B CN201310275223.4A CN201310275223A CN103308143B CN 103308143 B CN103308143 B CN 103308143B CN 201310275223 A CN201310275223 A CN 201310275223A CN 103308143 B CN103308143 B CN 103308143B
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- plaster mold
- tested sample
- mold frock
- frock
- sound
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Abstract
The invention provides a kind of plaster mold frock improving acoustic part of automobile sound-absorbing test result reliability, the described upper surface of plaster mold frock and the mating shapes of tested sample, when making tested sample be positioned over plaster mold frock upper surface and the upper surface of plaster mold frock fit tightly; The upper surface of tested sample is the sound-absorbing face needing test, needs to place upward.The lower surface of described plaster mold frock is plane.This plaster mold tool structure is simple, and result of use is good, substantially improves test result.
Description
Technical field
The present invention relates to a kind of frock, specifically a kind of plaster mold frock improving acoustic part of automobile sound-absorbing test result reliability.
Background technology
Along with developing rapidly of Domestic Automotive Industry, the demand being suitable for the auto parts and components goods of various dissimilar and class increases increasingly.Have many for irregularly shaped in auto parts and components, if directly erose tested sample is placed in and carries out sound-absorbing test on the ground, then because there is air layer on irregular tested sample and ground, and have cavity unavoidably between the sound insulating material that covers of the tested sample back side and exemplar, thus the accuracy of impact to the test result in the sound-absorbing face of tested sample.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of plaster mold frock improving acoustic part of automobile sound-absorbing test result reliability, tested sample and this plaster mold frock being made to fit tightly when testing, thus improve the reliability of test.The technical solution used in the present invention is:
A kind of plaster mold frock improving acoustic part of automobile sound-absorbing test result reliability, the described upper surface of plaster mold frock and the mating shapes of tested sample, when making tested sample be positioned over plaster mold frock upper surface and the upper surface of plaster mold frock fit tightly;
The lower surface of described plaster mold frock is plane.
Advantage of the present invention: this plaster mold tool structure is simple, and result of use is good.Substantially improve test result.
Accompanying drawing explanation
Fig. 1 is plaster mold frock schematic diagram of the present invention.
Fig. 2 is tested sample schematic diagram.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 1 and Figure 2:
Improve a plaster mold frock for acoustic part of automobile sound-absorbing test result reliability, its upper surface adds the mating shapes of building site and tested sample.When tested sample being placed in plaster mold frock, tested sample completely and the upper surface of plaster mold frock fit tightly, do not leave a blank chamber in centre.The upper surface of tested sample is the sound-absorbing face needing test, needs to place upward.The lower surface of described plaster mold frock is plane.
Therefore and fit very well between ground when testing, first plaster mold frock is placed on ground smooth in reverberation chamber, the lower surface due to plaster mold frock is flat, can not have air layer.Then tested sample is placed in plaster mold frock upper surface according to the die cavity correspondence of plaster mold, periphery sound insulating material bound edge, can prevents sound from entering between plaster mold frock upper surface and tested sample further.
The reverberation time utilizing testing software to measure microphone when adding tested sample to receive; Then tested sample is taken out, test the reverberation time received by microphone when not adding tested sample, by sound-absorbing computing formula, obtain sound-absorption coefficient.
Claims (1)
1. one kind is improved the plaster mold frock of acoustic part of automobile sound-absorbing test result reliability, it is characterized in that: the described upper surface of plaster mold frock and the mating shapes of tested sample, when making tested sample be positioned over plaster mold frock upper surface and the upper surface of plaster mold frock fit tightly;
The lower surface of described plaster mold frock is plane;
Therefore and fit very well between ground when testing, first plaster mold frock is placed on ground smooth in reverberation chamber, the lower surface due to plaster mold frock is flat, can not have air layer; Then tested sample is placed in plaster mold frock upper surface according to the die cavity correspondence of plaster mold, periphery sound insulating material bound edge, prevents sound from entering between plaster mold frock upper surface and tested sample;
The reverberation time utilizing testing software to measure microphone when adding tested sample to receive; Then tested sample is taken out, test the reverberation time received by microphone when not adding tested sample, by sound-absorbing computing formula, obtain sound-absorption coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275223.4A CN103308143B (en) | 2013-07-02 | 2013-07-02 | Improve the plaster mold frock of acoustic part of automobile sound-absorbing test result reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275223.4A CN103308143B (en) | 2013-07-02 | 2013-07-02 | Improve the plaster mold frock of acoustic part of automobile sound-absorbing test result reliability |
Publications (2)
| Publication Number | Publication Date |
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| CN103308143A CN103308143A (en) | 2013-09-18 |
| CN103308143B true CN103308143B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310275223.4A Active CN103308143B (en) | 2013-07-02 | 2013-07-02 | Improve the plaster mold frock of acoustic part of automobile sound-absorbing test result reliability |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565191A (en) * | 2012-02-17 | 2012-07-11 | 重庆长安汽车股份有限公司 | Device for evaluating sound insulation and absorption performance of automobile body part |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662719B (en) * | 2008-08-29 | 2013-11-06 | 深圳富泰宏精密工业有限公司 | Isolation box for audio-frequency test |
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- 2013-07-02 CN CN201310275223.4A patent/CN103308143B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565191A (en) * | 2012-02-17 | 2012-07-11 | 重庆长安汽车股份有限公司 | Device for evaluating sound insulation and absorption performance of automobile body part |
Non-Patent Citations (2)
| Title |
|---|
| 不规则工件的新型加工方法;马光等;《现代机械》;20111231(第4期);第3-7、48页 * |
| 不规则工件的装夹;卢笛;《铁道机车车辆工人》;19951231(第7期);第31页 * |
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| CN103308143A (en) | 2013-09-18 |
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