CN210108574U - Four-pressure head assembly suitable for measuring non-isometric residual stress - Google Patents
Four-pressure head assembly suitable for measuring non-isometric residual stress Download PDFInfo
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- CN210108574U CN210108574U CN201920919693.2U CN201920919693U CN210108574U CN 210108574 U CN210108574 U CN 210108574U CN 201920919693 U CN201920919693 U CN 201920919693U CN 210108574 U CN210108574 U CN 210108574U
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Abstract
The utility model provides a four pressure head subassemblies suitable for measure non-equiaxial residual stress, includes linear electric motor, keysets, 4 load cell and 4 Knoop's pressure heads, linear electric motor fixes on portable appearance of impressing, the keysets is connected with the linear electric motor transfer line, 4 load cell are connected to the keysets below, the Knoop's pressure head is connected in load cell below, 4 Knoop's pressure head major axes become 0 degree, 45 degrees, 90 degrees and 135 degrees with the reference datum line respectively. The utility model provides an avoid manual adjustment, simplified operation, the higher four pressure head subassemblies that are applicable to of efficiency of software testing non-isometric residual stress, compare with the single pressure head subassembly of current commercial instrument of impressing, the utility model discloses a four pressure head subassemblies become 45 degrees each other, only need can acquire current single pressure head subassembly through once impressing and carry out the data such as 4 times and impress that test could obtain, avoid relapse the dismouting pressure head to the save time cost improves efficiency of software testing.
Description
Technical Field
The utility model relates to a pressure head subassembly for instrumented indentation test is particularly useful for adopting instrumented indentation appearance to measure non-isometric residual stress's Knoop pressure head subassembly.
Background
On the surface of the engineering material in service, non-equiaxial residual stress always exists, and further the mechanical property and service life of the engineering material are influenced. In order to detect non-isometric residual stresses, a method of detecting 4 impressions on the surface of a material using a knoop indenter currently exists. In the 4 pressing processes, the method must ensure that the long axis of the Knoop indenter and the datum line respectively form 0 degree, 45 degrees, 90 degrees and 135 degrees, and further obtain the main stress magnitude and direction of the non-equiaxial residual stress. However, according to the method, the single pressure head assembly using the existing commercial pressure instrument needs to be pressed in for 4 times, the pressure head needs to be repeatedly disassembled and assembled during pressing in each time, the angle between the long axis of the Knoop pressure head and the reference datum line is manually adjusted, the process is complicated, and the testing efficiency is greatly reduced.
Disclosure of Invention
In order to overcome the angle of the needs 4 times of having single pressure head subassembly to impress, relapse manual adjustment knoop pressure head major axis and datum line, greatly reduce efficiency of software testing not enough, the utility model provides an avoid manual adjustment, simplified operation, the higher four pressure head subassemblies that are applicable to of efficiency of software testing non-isometric residual stress compare with the single pressure head subassembly of current commercial instrument of impressing, the utility model discloses a four pressure head subassemblies each other become 45 degrees, only need can acquire current single pressure head subassembly through once impressing and carry out 4 times and impress whole loads that the test could obtain, data such as degree of depth, avoid relapse the dismouting pressure head to save time cost improves efficiency of software testing.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a four pressure head subassemblies suitable for measure non-equiaxial residual stress, includes linear electric motor, keysets, 4 load cell and 4 Knoop's pressure heads, linear electric motor fixes on portable appearance of impressing, the keysets is connected with the linear electric motor transfer line, 4 load cell are connected to the keysets below, the Knoop's pressure head is connected in load cell below, 4 Knoop's pressure head major axes become 0 degree, 45 degrees, 90 degrees and 135 degrees with the reference datum line respectively.
Furthermore, a grating ruler is arranged in the linear motor and used for measuring the displacement and the press-in depth of the transmission rod of the linear motor.
And furthermore, the adapter plate is connected with the linear motor transmission rod through a threaded hole.
Furthermore, the lower part of the adapter plate is provided with 4 threaded rods for connecting load sensors, and the 4 load sensors are connected with the threaded rods through threaded holes.
Preferably, the knoop indenter is connected below the load cell by a coupling.
The beneficial effects of the utility model are that: the angle between the long axes of the 4 Knoop indenters and the reference datum line can be locked to form 45 degrees, 4 residual indentations are obtained on the surface of the service engineering material through one-time pressing, the long axes of the residual indentations and the reference datum line respectively form 0 degree, 45 degrees, 90 degrees and 135 degrees, all data which can be obtained only through 4 pressing tests of the existing single indenter assembly are obtained, and test data support is provided for solving non-isometric residual stress. The utility model discloses compare with the single pressure head subassembly of commercial instrument, have simple to operate, test quick characteristics, can effectively improve efficiency of software testing, practice thrift the time cost of test.
Drawings
Fig. 1 is an axial view of the present invention. Wherein, 1 is linear electric motor, 2 is the keysets, 3 is load cell, and 4 is the Knoop pressure head.
Fig. 2 is a front view of the present invention.
Fig. 3 is a schematic view of the residual indentation pressed into the surface of the engineering material in service.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, the four-pressure head assembly suitable for measuring non-isometric residual stress comprises a linear motor 1, an adapter plate 2, 4 load sensors 3 and 4 knoop pressure heads 4, wherein the linear motor 1 is fixed on a portable indentation instrument, and a grating ruler is arranged in the linear motor and used for measuring the displacement and indentation depth of a transmission rod of the linear motor 1; the adapter plate 2 is connected with a transmission rod of the linear motor 1 through a threaded hole, 4 threaded rods are arranged below the adapter plate 2, and 4 load sensors 3 are connected with the threaded rods through threaded holes; the number of the Knoop indenters 4 is 4, the Knoop indenters are respectively connected below the 4 load sensors 3 through couplers, and the long axes of the 4 Knoop indenters form 0 degree, 45 degrees, 90 degrees and 135 degrees with a reference datum line.
The working process of the embodiment is as follows:
firstly, a linear motor 1, an adapter plate 2, a load sensor 3 and a Knoop indenter 4 are arranged on a pressing instrument according to the figure 1, and the long axes of the 4 Knoop indenters 4 form 0 degree, 45 degrees, 90 degrees and 135 degrees with a reference datum line respectively.
Secondly, a residual stress service engineering material is pressed in, 4 groups of data such as load, depth and the like are obtained, and test data support is provided for solving the non-isometric residual stress.
According to the scheme of the embodiment, the angles between the long axes of the 4 Knoop indenters and the reference datum line are locked to form 45 degrees, 4 residual indentations are obtained on the surface of the service engineering material through one-time pressing, the long axes of the residual indentations and the reference datum line form 0 degree, 45 degrees, 90 degrees and 135 degrees respectively, all data which can be obtained only through 4 pressing tests of the existing single indenter assembly are obtained, and test data support is provided for solving the non-isometric residual stress. The utility model discloses compare with the single pressure head subassembly of commercial instrument, have simple to operate, test quick characteristics, can effectively improve efficiency of software testing, practice thrift the time cost of test.
Claims (5)
1. The utility model provides a four pressure head subassemblies suitable for measure non-equiaxial residual stress, its characterized in that, four pressure head subassemblies include linear electric motor, keysets, 4 load sensors and 4 Knoop pressure heads, linear electric motor fixes on portable indentation appearance, the keysets is connected with the linear electric motor transfer line, 4 load sensors are connected to the keysets below, the Knoop pressure head is connected in the load sensor below, 4 Knoop pressure head major axes become 0 degree, 45 degrees, 90 degrees and 135 degrees with the reference datum line respectively.
2. A four ram assembly adapted for measuring non-isometric residual stress according to claim 1 wherein the linear motor includes a grating scale therein for measuring linear motor actuator rod displacement and plunge depth.
3. A four ram assembly adapted for measuring non-isometric residual stresses as claimed in claim 1 or claim 2 wherein said adapter plate is connected to the linear motor drive link by a threaded hole.
4. A four ram assembly adapted for measuring non-isometric residual stresses according to claim 1 or claim 2 wherein the adapter plate contains 4 threaded rods beneath it for connection to load cells, the 4 load cells being connected to the threaded rods by threaded holes.
5. A four ram assembly adapted for measuring non-isometric residual stresses as claimed in claim 1 or claim 2 wherein the knoop ram is coupled below the load cell by a coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920919693.2U CN210108574U (en) | 2019-06-18 | 2019-06-18 | Four-pressure head assembly suitable for measuring non-isometric residual stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920919693.2U CN210108574U (en) | 2019-06-18 | 2019-06-18 | Four-pressure head assembly suitable for measuring non-isometric residual stress |
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| CN210108574U true CN210108574U (en) | 2020-02-21 |
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| CN201920919693.2U Active CN210108574U (en) | 2019-06-18 | 2019-06-18 | Four-pressure head assembly suitable for measuring non-isometric residual stress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261020A (en) * | 2019-06-18 | 2019-09-20 | 浙江工业大学 | Suitable for measuring four pressure head components of nonequiaxial residual stress |
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2019
- 2019-06-18 CN CN201920919693.2U patent/CN210108574U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261020A (en) * | 2019-06-18 | 2019-09-20 | 浙江工业大学 | Suitable for measuring four pressure head components of nonequiaxial residual stress |
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