CN101256125B - Method for aligning rod bundle checkout sample - Google Patents
Method for aligning rod bundle checkout sample Download PDFInfo
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- CN101256125B CN101256125B CN2008100194054A CN200810019405A CN101256125B CN 101256125 B CN101256125 B CN 101256125B CN 2008100194054 A CN2008100194054 A CN 2008100194054A CN 200810019405 A CN200810019405 A CN 200810019405A CN 101256125 B CN101256125 B CN 101256125B
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- sample
- aligning
- test sample
- straightening
- rod bundle
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Abstract
The invention provides a straightening process of bull rod test sample, which includes the following steps: at first straightening holding parts on double ends of the bull rod test sample and holding it in one central line as much as possible, then fastening the holding parts on double ends of the bull rod test sample tightly on the stretching equipment, loading and stretching, decelerating tension speed when approach to flat, stopping loading as soon as the test sample is straightening, controlling the loaded load below the yield load of the test sample strictly. Using the straightening method, can overcome the defects existing in the bull rod test sample straightening process, the straightening effect is good, straightening efficiency is high, and the method has little affects on the performance of the test sample.
Description
Technical field
The invention belongs to the physical and chemical inspection field, relate in particular to a kind of method for aligning of rod bundle checkout sample.
Background technology
When carrying out gren rod, cold-drawn wire rod, cold rolling rod bundle checkout, often need will the wire rod sample could check behind the aligning, weigh sample etc. of the wire rod that for example need survey sample, every meter weight of survey of wire rod tensile sample, the wire rod cold bend test of length growth rate all must be aligned.Method with wire rod sample aligning mainly contains wooden mallet aligning method and pressing machine aligning method at present.
Wooden mallet aligning method is exactly that the artificial wooden mallet that uses knocks the wire rod sample straight.The shortcoming of this aligning method is: (1) can only align the wire rod sample than minor diameter, and sample can not knock sample straight than diameter strength big, personnel selection when intensity is higher; (2) labour intensity is big, and is straight by manually striking fully, takes a lot of work very much when sample quantities is very big, requires great effort; (3) influence to sample performance is bigger, strikes and directly can cause the inhomogeneous and local deformation of distortion excessive, and the performance of sample is exerted an influence; (4) leveling effect is bad, and the flatness of aligning back sample is often relatively poor.
Pressing machine aligning method utilizes various pressing machinees with wire rod sample concora crush aligning progressively exactly, and the shortcoming of this aligning method is; (1) efficient is low, need operating personnel the last branch of pressing machine, a part with wire rod sample straightening; (2) leveling effect is bad, and the flatness of aligning back sample is relatively poor.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method for aligning of rod bundle checkout sample, this method can overcome the shortcoming that present rod bundle checkout sample method for aligning exists, leveling effect is good, aligning efficient height, less to the influence of sample performance, can be used for the aligning of hot rolling, cold-drawn, cold-rolled steel rod bundle checkout sample.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is: at first the retained part at wire rod sample two ends is aligned and remained on the same center line as far as possible, the aligning of retained part can adopt the pressing machine aligning, pulls methods such as straight on bench vice; Retained part with wire rod sample two ends clamps on stretcher then, load to stretch, and should slow down draw speed when straight, should stop immediately loading behind the sample aligning, and the load of strict control loaded is lower than the yield load of sample.Good sample gets final product to take off aligning after the unloading.
With the retained part aligning at wire rod sample two ends and remain on the same center line as far as possible, be the clamping when stretching before the tension straingtening, the unbalance loading when also helping reducing to stretch.To be lower than the yield stress ReL1 (Rp0.2) of sample be in order to reduce the influence of sample work hardening to the service check result to strict control loaded stress during stretching.
Adopt method for aligning of the present invention, can overcome the shortcoming that present rod bundle checkout sample method for aligning exists, leveling effect is good, aligning efficient height, less to the influence of sample performance.
Embodiment
Choose the low-carbon steel rod bundle of φ 9mm, by method aligning back check tensile property of the present invention, assay sees Table 1.The tensile property assay of also having listed wooden mallet aligning method, pressing machine aligning method in the table 1 and not aligned the sample of Direct Test.As seen from Table 1, the inventive method and pressing machine aligning method are very little to the influence of aligning back ruggedness test result, and be very approaching with the intensity of not aligning the Direct Test sample.The result is lower for wooden mallet aligning method ruggedness test, this is because the distortion on the sample cross section of employing wooden mallet aligning is uneven, do not enter the cross section in sclerosis stage for existing local plastic deformation, be equivalent to reduce cross-sectional area, thereby make the yield stress Rp0.2 of mensuration lower, this and work hardening phenomenon be contradiction not.The inventive method is not only little to performance impact, also has aligning good straightness degree, the high advantage of aligning efficient.
The different method for aligning aligning of table 1 after stretching service check result
| Method for aligning | Sample quantities | Statistical item | Tensile property | ||
| Rp0.2MPa | Rm?MPa | Agt％ | |||
| The inventive method | 50 | Minimum value | 330 | 479 | 16.5 |
| Maximal value | 365 | 493 | 19.5 | ||
| Mean value | 344 | 489 | 17.0 | ||
| Pressing machine aligning method | 50 | Minimum value | 330 | 480 | 16.0 |
| Maximal value | 360 | 495 | 19.0 | ||
| Mean value | 344 | 488 | 17.5 | ||
| Wooden mallet aligning method | 50 | Minimum value | 293 | 470 | 16.5 |
| Maximal value | 338 | 485 | 19.0 | ||
| Mean value | 323 | 477 | 18.0 | ||
| Do not align Direct Test | 50 | Minimum value | 326 | 476 | |
| Maximal value | 352 | 504 | |||
| Mean value | 343 | 491 | |||
Claims (2)
1. the method for aligning of a rod bundle checkout sample, it is characterized in that, at first the retained part at described sample two ends is aligned and remained on the same center line as far as possible, retained part with described sample two ends clamps on stretcher then, load and stretch, should slow down draw speed when straight, should stop immediately loading behind the described sample aligning, the load of strict control loaded is lower than the yield load of described sample.
2. the method for aligning of rod bundle checkout sample according to claim 1 is characterized in that, described stretcher is a cupping machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100194054A CN101256125B (en) | 2008-01-02 | 2008-01-02 | Method for aligning rod bundle checkout sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100194054A CN101256125B (en) | 2008-01-02 | 2008-01-02 | Method for aligning rod bundle checkout sample |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101256125A CN101256125A (en) | 2008-09-03 |
| CN101256125B true CN101256125B (en) | 2011-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100194054A Expired - Fee Related CN101256125B (en) | 2008-01-02 | 2008-01-02 | Method for aligning rod bundle checkout sample |
Country Status (1)
| Country | Link |
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| CN (1) | CN101256125B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699143B (en) * | 2016-02-18 | 2018-08-14 | 航天精工股份有限公司 | A kind of mechanics coupon producing device and preparation method thereof |
| CN108957134A (en) * | 2017-05-20 | 2018-12-07 | 广东韶钢松山股份有限公司 | A kind of measurement method of copper clad steel gren rod conductivity |
| CN111982627A (en) * | 2020-08-21 | 2020-11-24 | 无锡隆达金属材料有限公司 | Processing method of small-caliber coil pipe room-temperature tensile sample |
| CN112378757A (en) * | 2020-11-12 | 2021-02-19 | 张家港荣盛特钢有限公司 | Coiled steel bar tensile test method without artificial aging |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5515294A (en) * | 1994-06-10 | 1996-05-07 | L & P Property Management Company | Method and apparatus for testing coiled materials |
| CN2408452Y (en) * | 2000-02-22 | 2000-11-29 | 熊华业 | Tension tester |
| CN2909231Y (en) * | 2006-05-31 | 2007-06-06 | 武汉钢铁(集团)公司 | Chuck of metal wire torsion testing machine |
-
2008
- 2008-01-02 CN CN2008100194054A patent/CN101256125B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5515294A (en) * | 1994-06-10 | 1996-05-07 | L & P Property Management Company | Method and apparatus for testing coiled materials |
| CN2408452Y (en) * | 2000-02-22 | 2000-11-29 | 熊华业 | Tension tester |
| CN2909231Y (en) * | 2006-05-31 | 2007-06-06 | 武汉钢铁(集团)公司 | Chuck of metal wire torsion testing machine |
Non-Patent Citations (4)
| Title |
|---|
| 张贺宗 等.碳结钢盘条力学性能测试方法研究.理化检验-物理分册32 6.1996,32(6),48-49. |
| 张贺宗 等.碳结钢盘条力学性能测试方法研究.理化检验-物理分册32 6.1996,32(6),48-49. * |
| 曾强国 等.高速线材冷镦试验样品制备方法的研究.物理测试 3.2003,(3),39-40、36. |
| 曾强国 等.高速线材冷镦试验样品制备方法的研究.物理测试 3.2003,(3),39-40、36. * |
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| Publication number | Publication date |
|---|---|
| CN101256125A (en) | 2008-09-03 |
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