CN112485141A - Test head assembly in surface hardness testing device of metal workpiece - Google Patents
Test head assembly in surface hardness testing device of metal workpiece Download PDFInfo
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- CN112485141A CN112485141A CN202011265458.1A CN202011265458A CN112485141A CN 112485141 A CN112485141 A CN 112485141A CN 202011265458 A CN202011265458 A CN 202011265458A CN 112485141 A CN112485141 A CN 112485141A
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- test head
- connecting rod
- head assembly
- depression bar
- rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a test head assembly in a surface hardness test device of a metal workpiece, belonging to the technical field of machinery. It has solved prior art and has had the poor problem of stability. This test head subassembly among metal workpiece's surface hardness testing arrangement includes connecting rod, depression bar, the bolster that resets and test head, and the vertical setting of connecting rod and connecting rod upper end are used for being connected with the driving piece, and depression bar swing joint is in connecting rod lower extreme department, and above-mentioned bolster that resets is located between depression bar and the connecting rod and the depression bar has the trend that moves down under the effect of the buffering subassembly that resets, and above-mentioned test head links firmly in the frame and the test head is just right with the depression bar lateral part. The test head assembly in the surface hardness test device for the metal workpiece is high in stability.
Description
Technical Field
The invention belongs to the technical field of machinery, and relates to a test head assembly in a surface hardness testing device of a metal workpiece.
Background
Hardness is one of the most common indicators for evaluating mechanical properties of metallic materials. The essence of hardness is the ability of a material to resist being pressed in by another harder material. For the tested material, the hardness represents the comprehensive performance of various physical quantities such as elasticity, plasticity, strength, toughness, abrasion resistance and the like reflected under the action of a certain pressure head and a test force. The hardness test can reflect the performance difference of the metal material under different chemical compositions, tissue structures and heat treatment process conditions, so the hardness test is widely applied to the inspection of the metal performance, the supervision of the heat treatment process quality and the development of new materials.
The static test method is one of main means for detecting the surface hardness of the metal workpiece, and particularly, a test head is slowly moved downwards at a constant speed without impact and is contacted with the surface of the metal workpiece.
The surface hardness of the metal workpiece is mainly determined by the depth of the indentation, the projection area of the indentation or the gravure area of the indentation.
However, in the existing side-viewing device, the test head is directly in rigid contact with the surface of the metal workpiece, and the test head cannot be buffered, so that the stability of the test equipment is poor after the test equipment is used for a long time.
Disclosure of Invention
The present invention is directed to solve the above problems of the prior art, and an object of the present invention is to provide a test head assembly for a surface hardness testing apparatus of a metal workpiece, which has high stability and a compact structure.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a test head subassembly among metal work's surface hardness testing arrangement, metal work's surface hardness testing arrangement includes the frame, have in the frame and be used for placing the operation panel by test work, connect in the frame and the test head subassembly is located operation panel upper portion department by the test head subassembly, a serial communication port, this test head subassembly includes the connecting rod, the depression bar, bolster and test head reset, the vertical setting of connecting rod and connecting rod upper end are used for being connected with the driving piece, depression bar swing joint is in connecting rod lower extreme department, above-mentioned bolster that resets is located between depression bar and the connecting rod and the depression bar has the trend that moves down under the effect that resets buffering subassembly, above-mentioned test head links firmly in the frame and the test head just right with the depression bar lateral.
The test head assembly is creatively connected with a pressure lever at the lower end of the connecting rod, and meanwhile, a reset buffer piece is arranged between the pressure lever and the connecting rod.
In the initial state, the pressure lever can have the trend of moving downwards under the action of the reset buffer piece.
Since the metal workpiece to be tested is placed at the work table, the ram is located directly above the work table. After the driving piece drives the connecting rod and the pressing rod to move downwards, the pressing rod can be stably contacted with the tested workpiece.
And corresponding indentation is acted on the workpiece through the pressure lever.
In the operation process, the pressure rod can generate proper buffer relative to the connecting rod under the action of the reset buffer piece. Effectively avoiding the connecting rod from receiving the reaction force of transition and ensuring the stability of the testing device.
Meanwhile, the test head can also detect the upward movement amount of the pressure lever relative to the connecting rod. In the actual test operation, the specific hardness of the workpiece is obtained according to the tested upward displacement of the pressure lever and the comprehensive calculation of the indentation of the surface of the metal workpiece.
In the test head assembly in the surface hardness testing device for the metal workpiece, the lower end of the connecting rod is provided with a concave connecting hole, a blocking edge protruding towards the inner side is arranged at the lower end opening of the connecting hole, the upper end of the pressure rod penetrates through the connecting hole, the upper end of the pressure rod is in threaded connection with a limiting nut, and the limiting nut is abutted against the upper part of the blocking edge.
Because limit nut connects on the depression bar, and limit nut supports and leans on keeping off the edge, such structure can guarantee depression bar and connecting rod stable connection, can not drop between the two.
In the test head assembly in the device for testing the surface hardness of the metal workpiece, the blocking edge and the connecting rod are of an integrated structure.
This suitably improves the compactness of the assembly.
In the test head assembly in the device for testing the surface hardness of the metal workpiece, the spring is arranged in the connecting hole, two ends of the spring are respectively acted on the connecting rod and the pressure rod, and the limiting nut has the tendency of abutting against the blocking edge under the elastic force action of the spring.
The lower limiting nut is abutted against the blocking edge under the action of the elastic force of the spring, and the structure ensures that the pressing rod always has the trend of moving downwards.
In the test head assembly in the device for testing the surface hardness of the metal workpiece, the side part of the connecting rod is provided with a through adjusting notch, and the limiting nut is positioned at the adjusting notch.
The instrument can be pressed on limit nut after stretching into the connecting hole by adjusting the breach, can change the initial position of depression bar after rotating the depression bar to improve the suitability of subassembly.
In the testing head assembly in the device for testing the surface hardness of the metal workpiece, the height of the adjusting notch is 5-8 times of the thickness of the limiting nut.
In the test head assembly in the device for testing the surface hardness of the metal workpiece, the middle part of the pressure rod is provided with a convex shoulder, and the test head assembly further comprises a buffer gasket, wherein the buffer gasket is sleeved on the pressure rod and is tightly pressed between the connecting rod and the convex shoulder.
The buffer washer is limited between the shoulder and the lower end of the connecting rod, and the buffer washer is sleeved on the pressure rod, so that the structure can ensure that the buffer washer is stably connected to the pressure rod.
In the test head assembly in the device for testing the surface hardness of the metal workpiece, the buffer washer is made of a rubber material.
In the test head assembly in the surface hardness testing device for the metal workpiece, the test head assembly further comprises a positioning cylinder, an adjusting rod and a lock pin, wherein the positioning cylinder is fixedly connected to the rack, the upper end of the adjusting rod penetrates through the positioning cylinder, the lock pin is connected to the positioning cylinder, and the adjusting rod is in positioning connection with the positioning cylinder through the lock pin.
After the lock pin is loosened, the adjusting rod can move up and down along the positioning cylinder, and after the position of the adjusting rod is adjusted, the adjusting rod is connected with the lock pin of the positioning cylinder through the lock pin again. Because the test head is connected at the lower end of the adjusting rod, the position of the test head is finally changed. The applicability of the assembly is effectively improved.
In the test head assembly in the device for testing the surface hardness of the metal workpiece, the lock pin is in threaded connection with the positioning cylinder.
The lockpin is in threaded connection with the positioning cylinder, so that the inner end of the lockpin can stably abut against the adjusting rod, and finally the adjusting rod is stably connected with the positioning cylinder.
Compared with the prior art, the test head assembly in the surface hardness testing device for the metal workpiece has the advantages that proper buffering can be generated between the compression bar and the connecting rod in the testing process, so that the driving piece in the test assembly is prevented from being prematurely damaged due to the reaction force, and the stability of the test head assembly is effectively improved.
Meanwhile, the joint of the compression bar and the connecting bar is coated by the buffer washer, and the test head is close to the compression head, so that the structure is compact and the practical value is high.
Drawings
FIG. 1 is a schematic structural view of a test head assembly in the surface hardness testing apparatus for a metal workpiece.
In the figure, 1, a frame; 2. an operation table; 3. a connecting rod; 3a, connecting holes; 3a1, blocking edge; 3b, adjusting the gap; 4. a pressure lever; 4a, a shoulder; 5. a test head; 6. a limit nut; 7. a spring; 8. a cushion washer; 9. a positioning cylinder; 10. adjusting a rod; 11. and (4) locking pins.
Detailed Description
As shown in fig. 1, the surface hardness testing apparatus for a metal workpiece includes a frame 1 having a table 2 on which a workpiece to be tested is placed, a head assembly to be tested being attached to the frame 1 and the head assembly being located at an upper portion of the table 2.
This test head subassembly among metal workpiece's surface hardness testing arrangement includes connecting rod 3, depression bar 4, the bolster that resets and test head 5, 3 vertical settings of connecting rod and connecting rod 3 upper ends are used for being connected with the driving piece, depression bar 4 swing joint is in connecting rod 3 lower extreme department, above-mentioned bolster that resets is located between depression bar 4 and the connecting rod 3 and depression bar 4 has the trend that moves down under the effect of the cushion subassembly that resets, above-mentioned test head links firmly in frame 1 and test head 5 is just right with the 4 lateral parts of depression bar.
The lower end of the connecting rod 3 is provided with a concave connecting hole 3a, the lower port of the connecting hole 3a is provided with a baffle edge 3a1 protruding inwards, the upper end of the pressure lever 4 is arranged at the connecting hole 3a in a penetrating way, the upper end of the pressure lever 4 is connected with a limit nut 6 in a threaded way, and the limit nut 6 is abutted against the upper part of the baffle edge 3a 1.
The blocking edge 3a1 and the connecting rod 3 are of an integral structure.
The connecting hole 3a is internally provided with a spring 7, two ends of the spring 7 respectively act on the connecting rod 3 and the pressure rod 4, and the limiting nut 6 has the tendency of abutting against the blocking edge 3a1 under the elastic force action of the spring 7.
The side of the connecting rod 3 is provided with a through adjusting notch 3b, and the limit nut 6 is positioned at the adjusting notch 3 b.
The height dimension of the adjusting gap 3b is 5-8 times of the thickness dimension of the limiting nut 6.
The middle part of the pressure lever 4 is provided with a convex shoulder 4a, and the pressure lever also comprises a buffer gasket 8, the buffer gasket 8 is sleeved on the pressure lever 4, and the buffer gasket 8 is tightly pressed between the connecting rod 3 and the shoulder 4 a.
The buffer gasket 8 is made of rubber material.
The automatic adjusting device is characterized by further comprising a positioning cylinder 9, an adjusting rod 10 and a lock pin 11, wherein the positioning cylinder 9 is fixedly connected to the rack 1, the upper end of the adjusting rod 10 penetrates through the positioning cylinder 9, the lock pin 11 is connected to the positioning cylinder 9, and the adjusting rod 10 is in positioning connection with the positioning cylinder 9 through the lock pin 11.
The lock pin 11 is in threaded connection with the positioning cylinder 9.
The test head assembly is creatively connected with a pressure lever at the lower end of the connecting rod, and meanwhile, a reset buffer piece is arranged between the pressure lever and the connecting rod.
In the initial state, the pressure lever can have the trend of moving downwards under the action of the reset buffer piece.
Since the metal workpiece to be tested is placed at the work table, the ram is located directly above the work table. After the driving piece drives the connecting rod and the pressing rod to move downwards, the pressing rod can be stably contacted with the tested workpiece.
And corresponding indentation is acted on the workpiece through the pressure lever.
Claims (9)
1. The utility model provides a test head subassembly among metal work's surface hardness testing arrangement, metal work's surface hardness testing arrangement includes the frame, have in the frame and be used for placing the operation panel by test work, connect in the frame and the test head subassembly is located operation panel upper portion department by the test head subassembly, a serial communication port, this test head subassembly includes the connecting rod, the depression bar, bolster and test head reset, the vertical setting of connecting rod and connecting rod upper end are used for being connected with the driving piece, depression bar swing joint is in connecting rod lower extreme department, above-mentioned bolster that resets is located between depression bar and the connecting rod and the depression bar has the trend that moves down under the effect that resets buffering subassembly, above-mentioned test head links firmly in the frame and the test head just right with the depression bar lateral.
2. The head assembly of claim 1, wherein the connecting rod has a lower end having a concave connecting hole, the lower port of the connecting hole has a flange protruding inward, the upper end of the pressing rod is inserted into the connecting hole, and the upper end of the pressing rod is screwed with a limit nut which abuts against the upper part of the flange.
3. The test head assembly of claim 2, wherein the retaining rim is of a unitary construction with the connecting rod.
4. The head assembly of claim 3, wherein the connecting hole has a spring, the two ends of the spring respectively act on the connecting rod and the pressing rod, and the limiting nut has a tendency to abut against the stop edge under the elastic force of the spring.
5. The head assembly of claim 4, wherein the side of the connecting rod has an adjustment notch extending therethrough, and the limit nut is located at the adjustment notch.
6. The test head assembly of claim 5, wherein the height dimension of the adjustment notch is 5 to 8 times the thickness dimension of the limit nut.
7. The head assembly of claim 6, wherein the middle portion of the pressing rod has a convex shoulder, and further comprising a buffer washer, the buffer washer is sleeved on the pressing rod, and the buffer washer is tightly pressed between the connecting rod and the shoulder.
8. The test head assembly of claim 7, wherein the cushion washer is a rubber material.
9. The apparatus for testing surface hardness of metal workpieces of claim 8, further comprising a positioning cylinder, an adjusting rod and a lock pin, wherein the positioning cylinder is fixedly connected to the frame, the upper end of the adjusting rod is inserted into the positioning cylinder, the lock pin is screwed onto the positioning cylinder, the adjusting rod is positioned with the positioning cylinder through the lock pin, the test head is a CCD camera, and the test head is fixedly connected to the lower end of the adjusting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265458.1A CN112485141A (en) | 2020-11-13 | 2020-11-13 | Test head assembly in surface hardness testing device of metal workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265458.1A CN112485141A (en) | 2020-11-13 | 2020-11-13 | Test head assembly in surface hardness testing device of metal workpiece |
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| Publication Number | Publication Date |
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| CN112485141A true CN112485141A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011265458.1A Pending CN112485141A (en) | 2020-11-13 | 2020-11-13 | Test head assembly in surface hardness testing device of metal workpiece |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB927141A (en) * | 1959-10-02 | 1963-05-29 | Ericsson Telefon Ab L M | Instrument for hardness testing |
| CN202420996U (en) * | 2011-12-15 | 2012-09-05 | 张天宝 | Electric Vickers hardness tester |
| CN103308405A (en) * | 2012-03-13 | 2013-09-18 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| CN204228550U (en) * | 2014-12-08 | 2015-03-25 | 国家林业局泡桐研究开发中心 | Hand-held pawpaw hardness-testing device |
| CN107247004A (en) * | 2017-06-12 | 2017-10-13 | 浙江农林大学 | Hardness of wood measuring instrument |
| CN206848096U (en) * | 2017-05-26 | 2018-01-05 | 湖北工程学院 | A kind of transfer head, indenter device and Brinell hardness tester |
| CN206906168U (en) * | 2017-05-18 | 2018-01-19 | 东莞市展鹏电子仪器有限公司 | A kind of band table Bareol hardness meter |
| CN109238890A (en) * | 2018-09-04 | 2019-01-18 | 东华理工大学 | A kind of rock multifunctional test system |
| CN208432469U (en) * | 2018-06-08 | 2019-01-25 | 湖北广建建筑有限公司 | A kind of construction materials quality hardness detecting instrument |
| CN109668776A (en) * | 2019-02-15 | 2019-04-23 | 新乡职业技术学院 | A kind of construction material rigidity detection device |
| CN209326547U (en) * | 2019-03-22 | 2019-08-30 | 广州市众道汽车有限公司 | A kind of automobile instrument disc detector that relevance grade is high |
| CN209470994U (en) * | 2019-01-16 | 2019-10-08 | 重庆荣亿精密机械有限公司 | A kind of hardness-testing device convenient for operation |
| CN210690255U (en) * | 2019-05-28 | 2020-06-05 | 贵州远东传动机械有限公司 | Bearing fatigue resistance detection device |
| CN111366460A (en) * | 2020-04-10 | 2020-07-03 | 湘潭大学 | Micro-nano indentation testing device and method |
| CN211652407U (en) * | 2019-10-14 | 2020-10-09 | 东莞材料基因高等理工研究院 | Portable indentation method mechanical properties is at active service tester |
-
2020
- 2020-11-13 CN CN202011265458.1A patent/CN112485141A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB927141A (en) * | 1959-10-02 | 1963-05-29 | Ericsson Telefon Ab L M | Instrument for hardness testing |
| CN202420996U (en) * | 2011-12-15 | 2012-09-05 | 张天宝 | Electric Vickers hardness tester |
| CN103308405A (en) * | 2012-03-13 | 2013-09-18 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| CN204228550U (en) * | 2014-12-08 | 2015-03-25 | 国家林业局泡桐研究开发中心 | Hand-held pawpaw hardness-testing device |
| CN206906168U (en) * | 2017-05-18 | 2018-01-19 | 东莞市展鹏电子仪器有限公司 | A kind of band table Bareol hardness meter |
| CN206848096U (en) * | 2017-05-26 | 2018-01-05 | 湖北工程学院 | A kind of transfer head, indenter device and Brinell hardness tester |
| CN107247004A (en) * | 2017-06-12 | 2017-10-13 | 浙江农林大学 | Hardness of wood measuring instrument |
| CN208432469U (en) * | 2018-06-08 | 2019-01-25 | 湖北广建建筑有限公司 | A kind of construction materials quality hardness detecting instrument |
| CN109238890A (en) * | 2018-09-04 | 2019-01-18 | 东华理工大学 | A kind of rock multifunctional test system |
| CN209470994U (en) * | 2019-01-16 | 2019-10-08 | 重庆荣亿精密机械有限公司 | A kind of hardness-testing device convenient for operation |
| CN109668776A (en) * | 2019-02-15 | 2019-04-23 | 新乡职业技术学院 | A kind of construction material rigidity detection device |
| CN209326547U (en) * | 2019-03-22 | 2019-08-30 | 广州市众道汽车有限公司 | A kind of automobile instrument disc detector that relevance grade is high |
| CN210690255U (en) * | 2019-05-28 | 2020-06-05 | 贵州远东传动机械有限公司 | Bearing fatigue resistance detection device |
| CN211652407U (en) * | 2019-10-14 | 2020-10-09 | 东莞材料基因高等理工研究院 | Portable indentation method mechanical properties is at active service tester |
| CN111366460A (en) * | 2020-04-10 | 2020-07-03 | 湘潭大学 | Micro-nano indentation testing device and method |
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Application publication date: 20210312 |