CN110261021B - Rotary pressure head assembly suitable for measuring anisometric residual stress - Google Patents
Rotary pressure head assembly suitable for measuring anisometric residual stress Download PDFInfo
- Publication number
- CN110261021B CN110261021B CN201910526364.6A CN201910526364A CN110261021B CN 110261021 B CN110261021 B CN 110261021B CN 201910526364 A CN201910526364 A CN 201910526364A CN 110261021 B CN110261021 B CN 110261021B
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- China
- Prior art keywords
- pressure head
- anisometric
- rotary
- residual stress
- adapter plate
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- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000007373 indentation Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 5
- RRLHMJHRFMHVNM-BQVXCWBNSA-N [(2s,3r,6r)-6-[5-[5-hydroxy-3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxypentoxy]-2-methyl-3,6-dihydro-2h-pyran-3-yl] acetate Chemical compound C1=C[C@@H](OC(C)=O)[C@H](C)O[C@H]1OCCCCCOC1=CC(O)=C2C(=O)C(C=3C=CC(O)=CC=3)=COC2=C1 RRLHMJHRFMHVNM-BQVXCWBNSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The rotary pressure head assembly suitable for measuring anisometric residual stress comprises a linear motor, an adapter plate, a rotary motor, a load sensor and a Knoop pressure head, wherein the linear motor is fixed on a portable press-in instrument, and the adapter plate is connected with a linear motor transmission rod; the rotating motor is fixedly connected with the adapter plate; the load sensor is connected with a movable shaft of the rotating motor; the knoop pressure head is connected with the load sensor. Compared with the fixed angle pressure head assembly of the existing commercial pressing instrument, the angle between the long axis of the Knoop pressure head and the reference datum line is accurately controlled by the rotating motor, so that angle errors caused by manual adjustment are avoided, and the testing efficiency is improved.
Description
Technical Field
The invention relates to a rotary pressure head assembly for instrumented indentation testing, in particular to a Knoop pressure head assembly for measuring anisometric residual stress by using an instrumented indentation instrument.
Background
The non-equiaxed residual stress on the surface of the service engineering material can obviously influence the mechanical property and service life of the service engineering material. There is currently a method for detecting anisometric residual stress by 4 presses on the surface of a material using a knoop indenter. During the 4 presses, the method must ensure that the knoop indenter long axis is at 0 degrees, 45 degrees, 90 degrees, and 135 degrees, respectively, from the reference line. Aiming at the method, the angle between the long axis of the Knoop pressure head and the reference line of the pressure head of the fixed angle pressure head assembly of the current commercial pressure instrument is required to be adjusted repeatedly, the error is large, the process is complex, and the testing efficiency is greatly reduced.
Disclosure of Invention
In order to overcome the defects of fixed angle and lower testing efficiency of the pressure head assembly in the prior art, the invention provides the rotary pressure head assembly which is adjustable in angle and higher in testing efficiency and is suitable for measuring anisometric residual stress.
The technical scheme adopted for solving the technical problems is as follows:
the rotary pressure head assembly suitable for measuring anisometric residual stress comprises a linear motor, an adapter plate, a rotary motor, a load sensor and a Knoop pressure head, wherein the linear motor is fixed on a portable press-in instrument, and the adapter plate is connected with a linear motor transmission rod; the rotating motor is fixedly connected with the adapter plate; the load sensor is connected with a movable shaft of the rotating motor; the knoop pressure head is connected with the load sensor.
Further, a grating ruler is arranged in the linear motor and used for measuring the pressing depth.
Still further, the keysets passes through the screw thread and is connected with linear electric motor transfer line.
Further, the rotating motor is connected with the adapter plate through screws.
Preferably, the load sensor is connected with the movable shaft of the rotating motor through threads.
The Knoop pressure head is connected with the load sensor through a coupling.
The beneficial effects of the invention are mainly shown in the following steps: the angle of impressing between accessible rotating electrical machines accurate control knoop pressure head major axis and the reference datum axis compares with the single pressure head subassembly of fixed angle on the current commercial appearance of impressing, has simple to operate, the reliable characteristics of test, can avoid the angle error that manual adjustment caused, improves test efficiency.
Drawings
Fig. 1 is an axial view of the present invention. Wherein 1 is a linear motor, 2 is an adapter plate, 3 is a rotary motor, 4 is a load sensor, and 5 is a knoop pressure head.
Fig. 2 is a schematic representation of the residual indentation of the surface of the pressed material according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a rotary pressure head assembly suitable for measuring anisometric residual stress comprises a linear motor 1, an adapter plate 2, a rotary motor 3, a load sensor 4 and a knoop pressure head 5, wherein the linear motor 1 is fixed on a portable press-in instrument, and a grating ruler is arranged in the linear motor 1 and is used for measuring the press-in depth; the adapter plate 2 is connected with a transmission rod of the linear motor 1 through threads; the rotating motor 3 is connected with the adapter plate 2 through screws; the load sensor 4 is connected with the movable shaft of the rotating motor 3 through internal threads; the knoop ram 5 is connected to the load cell 4 via a coupling.
The working process of the embodiment is as follows:
first, the linear motor 1, the adapter plate 2, the rotary motor 3, the load sensor 4, and the knoop indenter 5 are mounted on the portable press-in device as shown in fig. 1.
Secondly, the rotating motor 3 is controlled to rotate by using computer software, so that the Knoop indenter 5 rotates to a desired angle between the long axis and the reference line, and the data of the load, the depth and the like of the single test point are obtained.
Thirdly, repeating the second step until four indentations as shown in fig. 2 are completed, and completing the acquisition of the load, depth and other data of all the test points, thereby providing data support for calculating anisometric stress.
According to the scheme of the embodiment, the pressing angle between the long shaft of the Knoop pressing head 5 and the reference datum axis is precisely controlled through the rotating motor 3, and compared with a single pressing head assembly with a fixed angle on an existing commercial pressing instrument, the device has the characteristics of convenience in installation and reliability in testing, so that angle errors caused by manual adjustment are avoided, and the testing efficiency is improved.
Claims (6)
1. The rotary pressure head assembly is suitable for measuring anisometric residual stress and is characterized by comprising a linear motor, an adapter plate, a rotary motor, a load sensor and a Knoop pressure head, wherein the linear motor is fixed on a portable press-in instrument, and the adapter plate is connected with a linear motor transmission rod; the rotating motor is fixedly connected with the adapter plate; the load sensor is connected with a movable shaft of the rotating motor; the knoop pressure head is connected with the load sensor.
2. A rotary indenter assembly adapted for measuring anisometric residual stress as recited in claim 1 wherein the linear motor contains a grating scale within the linear motor for measuring the depth of indentation.
3. A rotary indenter assembly adapted to measure anisometric residual stress as claimed in claim 1 or 2 wherein the adapter plate is threadably connected to a linear motor drive rod.
4. A rotary indenter assembly adapted to measure anisometric residual stress as claimed in claim 1 or 2 wherein the rotary motor is screwed to the adapter plate.
5. A rotary indenter assembly adapted to measure anisometric residual stress as recited in claim 1 or 2 wherein the load cell is threadably coupled to the rotating electrical machine moveable shaft.
6. The rotary indenter assembly of claim 1 or 2 adapted to measure anisometric residual stress wherein the knoop indenter is coupled to a load cell via a coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910526364.6A CN110261021B (en) | 2019-06-18 | 2019-06-18 | Rotary pressure head assembly suitable for measuring anisometric residual stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910526364.6A CN110261021B (en) | 2019-06-18 | 2019-06-18 | Rotary pressure head assembly suitable for measuring anisometric residual stress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110261021A CN110261021A (en) | 2019-09-20 |
| CN110261021B true CN110261021B (en) | 2024-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910526364.6A Active CN110261021B (en) | 2019-06-18 | 2019-06-18 | Rotary pressure head assembly suitable for measuring anisometric residual stress |
Country Status (1)
| Country | Link |
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| CN (1) | CN110261021B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176026B (en) * | 2021-03-16 | 2023-06-16 | 蒋文春 | Device for measuring residual stress by indentation method and using method thereof |
| CN113074852A (en) * | 2021-03-16 | 2021-07-06 | 蒋文春 | Portable residual stress testing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110057475A (en) * | 2009-11-24 | 2011-06-01 | (주)프론틱스 | Apparatus for indentation test involving micom and evaluating method of residual stress using the same |
| CN102288500A (en) * | 2011-05-09 | 2011-12-21 | 中国人民解放军装甲兵工程学院 | High-precision instrumented indenter and calculation method for indented-in-sample depth of diamond indenting head |
| CN105842095A (en) * | 2016-03-22 | 2016-08-10 | 中国科学院金属研究所 | Computer controlled metal material indentation load-displacement data measurement system |
| CN106238635A (en) * | 2015-06-10 | 2016-12-21 | 上海泛华紧固系统有限公司 | Pipe external screw thread rolling and processing method, module and equipment and pipe external screw thread production line |
| CN210108573U (en) * | 2019-06-18 | 2020-02-21 | 浙江工业大学 | Rotary pressure head assembly suitable for measuring non-isometric residual stress |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100416723B1 (en) * | 2002-04-04 | 2004-01-31 | (주)프론틱스 | Apparatus for determining residual stress, method for determining residual stress data using it, residual stress determining method using it and recording medium thereof |
| KR101152323B1 (en) * | 2007-02-06 | 2012-06-11 | (주)프론틱스 | Estimation of non-equibiaxial stress using instrumented indentation technique |
-
2019
- 2019-06-18 CN CN201910526364.6A patent/CN110261021B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110057475A (en) * | 2009-11-24 | 2011-06-01 | (주)프론틱스 | Apparatus for indentation test involving micom and evaluating method of residual stress using the same |
| CN102288500A (en) * | 2011-05-09 | 2011-12-21 | 中国人民解放军装甲兵工程学院 | High-precision instrumented indenter and calculation method for indented-in-sample depth of diamond indenting head |
| CN106238635A (en) * | 2015-06-10 | 2016-12-21 | 上海泛华紧固系统有限公司 | Pipe external screw thread rolling and processing method, module and equipment and pipe external screw thread production line |
| CN105842095A (en) * | 2016-03-22 | 2016-08-10 | 中国科学院金属研究所 | Computer controlled metal material indentation load-displacement data measurement system |
| CN210108573U (en) * | 2019-06-18 | 2020-02-21 | 浙江工业大学 | Rotary pressure head assembly suitable for measuring non-isometric residual stress |
Non-Patent Citations (2)
| Title |
|---|
| Modeling and Experimental Verification for Non-Equibiaxial Residual Stress Evaluated by Knoop Indentations;Young-Cheon Kim;《Metals and Materials International》;全文 * |
| 显微硬度压痕法估算铝合金2A12残余应力;周世友等;《工业技术创新》;第第5卷卷(第第4期期);全文 * |
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| Publication number | Publication date |
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| CN110261021A (en) | 2019-09-20 |
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