CN103335907A - Quasi-static constraint cutting experiment device based on loading technology of material testing machine - Google Patents
Quasi-static constraint cutting experiment device based on loading technology of material testing machine Download PDFInfo
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- CN103335907A CN103335907A CN2013102457765A CN201310245776A CN103335907A CN 103335907 A CN103335907 A CN 103335907A CN 2013102457765 A CN2013102457765 A CN 2013102457765A CN 201310245776 A CN201310245776 A CN 201310245776A CN 103335907 A CN103335907 A CN 103335907A
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Abstract
The invention discloses a quasi-static constraint cutting experiment device based on the loading technology of a material testing machine. The quasi-static constraint cutting experiment device comprises a cutting support, a cutting slide rail, a cutting tool and a cutting sample constraint member, wherein a cutting operation space is formed at the center of the cutting support; the cutting slide rail is mounted in a longitudinal mounting hole of the cutting support in a slideable manner; one end of the cutting slide rail extends into the cutting operation space, and a cutting sample is mounted at the end; the other end of the cutting slide rail is located outside the cutting support so as to transfer the loading force of the material testing machine; the cutting tool is mounted in a transverse mounting hole of the cutting support, and a tool bit of the cutting tool is located on the cutting path at the front end of the cutting sample; and the cutting sample constraint member clings to the side surface of the front part of the cutting sample. The device disclosed by the invention has a simple structure and is convenient to operate; the material can generate serious plastic deformation by once cutting, and the degree of the plastic deformation is controllable; corresponding problems of the prior art are solved; and the device is an ideal experimental tool for studying the rule between different degrees of plastic deformation and the microstructural evolution of the material at low strain rate.
Description
Technical field
The present invention relates to the preparation experiment device of super fine crystal material, particularly the quasistatic based on the Material Testing Machine loading technique retrains the cutting experiment device.
Background technology
Material is under the severe plastic deformation condition, and material internal crystal grain can access refinement, even can produce ultra-fine grain or nanocrystal; This ultra-fine grain or nanocrystal material have the mechanical property of many excellences, as: high strength, high-fracture toughness and raising plasticity etc.The plastic yield degree direct influence the material grains degree of refinement, and then influences the mechanical property of material.In order to obtain being applied to the material with different mechanical properties under the different operating modes, just require to understand fully the plastic yield degree is how to influence the material heterogeneous microstructure, and then understand fully how to influence material mechanical performance.At present, not clear about plastic yield degree role in the microstructure of material develops, this has seriously restricted ultra-fine grain or nanocrystal Development of Materials.In order to understand the effect of plastic yield degree in ultra-fine grain or nanocrystal manufacture of materials better, be badly in need of the development of effective laboratory facilities and come the microstructure evolution rule of research material under the different plastic degree.
Passage extruding, high pressure torsion, accumulations such as traditional severe plastic deformation method has are rolled and are closed and reciprocating extrusion.These severe plastic deformation methods need repeatedly plastic history to produce big plastic yield at material internal; For the material of some high strength and high rigidity, can not utilize these traditional severe plastic deformation methods at room temperature to make the material production severe plastic deformation.Free cutting can make the material production severe plastic deformation as a kind of method that produces severe plastic deformation in a deformation process.But free cutting can't realize the control to the plastic yield degree in the working angles effectively; Simultaneously, the temperature rising that produces in the working angles under the high rate of strain can cause the grain growth in the material after the grain refinement again.Therefore, need the new experimental provision of development to study the relation between the different plastic degree and material microstructure evolution under the low rate of strain.
Summary of the invention
Problem at the prior art existence, the objective of the invention is to propose a kind of quasistatic constraint cutting experiment device based on the Material Testing Machine loading technique, to be implemented under the low rate of strain prerequisite, carry out the constraint cutting experiment of different plastic degree, for the relation between research different plastic degree and the material microstructure evolution creates conditions.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of quasistatic constraint cutting experiment device based on the Material Testing Machine loading technique, it is characterized in that: it comprises the cutting bearing, the cutting slide rail, cutting tool and cutting sample attaching means, the center of described cutting bearing offers the cutting operation space, and offer the horizontal mounting hole and the vertical mounting hole that lead to the cutting operation space on its horizontal vertical both direction respectively, described cutting slide rail is slidably mounted in vertical mounting hole, the one end stretches in the cutting operation space, and at this end the cutting sample is installed, the other end places outside the cutting bearing, to be used for transmitting the loading force of Material Testing Machine, described cutting tool is installed in the horizontal mounting hole directly or indirectly, its cutter head stretches in the cutting operation space, and place on the cutting path of cutting sample front end, described cutting sample attaching means is arranged on the cutting bearing directly or indirectly, and be close to the side of cutting the sample front portion, to prevent that cutting sample departs from cutting path because of stress deformation in working angles.
Preferably, above-mentioned quasistatic constraint cutting experiment device based on the Material Testing Machine loading technique also comprises the constraint fixed block, and described cutting tool is installed on this constraint fixed block, and this constraint fixed block is installed in the horizontal mounting hole of described cutting bearing.
Preferably, described cutting sample attaching means is made of limited block and spacer pin, and described limited block adjustable ground is installed on the described constraint fixed block, described spacer pin adjustable ground be installed on the described cutting bearing with described limited block over against horizontal mounting hole in.
Preferably, also be provided with the adjustment pad of regulating the two gap on the described constraint fixed block between cutting tool and limited block.
Preferably, described cutting bearing is cuboid.
Preferably, described cutting tool is provided with the sensor for detection of cutting force in the working angles.
Preferably, described cutting bearing is provided with for the camera head of measuring the working angles deformation field in real time.
The present invention obtains the cutting speed of 1 μ m/s～20 μ m/s by the loading speed of regulating Material Testing Machine, thereby can hang down the quasistatic cutting experiment of rate of strain, again by regulating the cutting tool plastic yield degree different with the spacing acquisition between cutting sample attaching means, thereby can utilize experimental provision of the present invention to hang down the quasistatic constraint cutting experiment of rate of strain, for the relation of research material between different plastic degree under the low rate of strain and material microstructure develop creates conditions, and then be able to research material and hanging down under the rate of strain different plastic degree to the influence of material mechanical performance.
The present invention is simple in structure, easy to operate, can just make the material production severe plastic deformation by cutting at one time, and the plastic yield degree is controlled, having solved the corresponding problem that prior art exists, is the gedanken experiment apparatus of research material rule between different plastic degree and material microstructure develop under the low rate of strain.
Description of drawings
Fig. 1 is the structural representation based on the quasistatic of Material Testing Machine loading technique constraint cutting experiment device of the embodiment of the invention;
Fig. 2 is the synoptic diagram of the quasistatic constraint cutting experiment device based on the Material Testing Machine loading technique shown in Figure 1 when placing Material Testing Machine to load.
Among the figure: 1, base; 2, guide rail; 3, load pressure head; 4, levelling joint; 5, cutting bearing; 6, load limit base; 7, cutting slide rail; 8, cutting sample; 9, spacer pin; 10, constraint fixed block; 11, cutting tool; 12, limited block; 13, adjust pad.
Embodiment
Hereinafter will be elaborated to embodiments of the invention by reference to the accompanying drawings.Need to prove that under the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.
Shown in Fig. 1～2, the quasistatic constraint cutting experiment device based on the Material Testing Machine loading technique of present embodiment comprises cutting bearing 5, cutting slide rail 7, cutting tool 11 and cutting sample attaching means, the center of cutting bearing 5 offers the cutting operation space, and offer the horizontal mounting hole and the vertical mounting hole that lead to the cutting operation space on its horizontal vertical both direction respectively, cutting slide rail 7 is slidably mounted in vertical mounting hole, the one end stretches in the cutting operation space, and at this end cutting sample 8 is installed, the other end places outside the cutting bearing 5, to be used for transmitting the loading force of Material Testing Machine, for making Material Testing Machine load more easy to operate to the power of cutting slide rail 7, can an end area be installed at the external end of cutting slide rail 7 and cut the bigger loading limit base 6 of slide rail 7, so both can having had bigger contact area to exert all one's strength because of the levelling joint 4 that loads limit base 6 and Material Testing Machine, load operation be easier carries out, and loading limit base 6 also can play effect spacing and that only stop to the constraint cutting when contacting with cutting bearing 5, cutting tool 11 is installed in the horizontal mounting hole directly or indirectly, its cutter head stretches in the cutting operation space, and place on the cutting path of cutting sample 8 front ends, cutting sample attaching means is arranged on the cutting bearing 5 directly or indirectly, and be close to the side of cutting sample 8 front portions, to prevent that cutting sample 8 departs from cutting path because of stress deformation in working angles.
Preferably, above-mentioned quasistatic constraint cutting experiment device based on the Material Testing Machine loading technique also comprises constraint fixed block 10, and cutting tool 11 is installed on this constraint fixed block 10, and this constraint fixed block 10 is installed in the horizontal mounting hole of cutting bearing 5.
For ease of installing and regulating, preferably, described cutting sample attaching means is made of limited block 12 and spacer pin 9, and limited block 12 adjustable grounds are installed on the described constraint fixed block 10, spacer pin 9 adjustable grounds be installed in the cutting bearing 5 on limited block 12 over against horizontal mounting hole in.
Apparently, limited block 12 can also be directly installed on the cutting bearing 5; The cutting sample attaching means that is made of limited block 12 and spacer pin 9 also can be substituted by the structural member of the one that is provided with cutting sample spacing hole or pilot hole.
For ease of regulating the gap of 12 of cutting tool 11 and limited blocks, cutting sample 8 is carried out the constraint cutting experiment of different plastic degree, preferably, cutting tool 11 and 12 of limited blocks also are provided with the adjustment pad 13 of regulating the two gap on the constraint fixed block 10, by changing the thickness of adjusting pad 13, can carry out the cutting experiment of different plastic degree to cutting sample 8.The thickness of adjusting pad 13 is more big, and the plastic yield degree that obtains is just more little, and when the thickness of adjusting pad 13 was enough big, the formation of 12 pairs of smear metals of limited block had not just influenced, and at this moment just has been equivalent to free cutting.
For ease of placing to retrain cutting experiment in Material Testing Machine, simultaneously for ease of processing, preferably, cutting bearing 5 adopts cuboid.
Preferably, described cutting tool 11 is provided with the sensor for detection of cutting force in the working angles.
Preferably, described cutting bearing 5 is provided with for the camera head of measuring the working angles deformation field in real time.The camera head of the whole working angles of record obviously, also can be installed in the appropriate location of Material Testing Machine.
The present invention can obtain cutting speed scope 1 μ m/s～20 μ m/s by regulating the loading speed of Material Testing Machine in use, thereby realizes the quasistatic cutting under the low rate of strain.
Enumerate several concrete cutting examples below in conjunction with Fig. 1～2:
Example 1
As shown in Figure 1, selecting thickness for use is that 15mm, rake face inclination angle are that 0 °, knife face inclination angle, back are that 5 ° cutting tool 11 is the limited block 12 of 15mm with thickness, selecting thickness is the adjustment pad 13 of 200 μ m, it is placed between cutting tool 11 and the limited block 12, and is fixed on together on the constraint fixed block 10.
Processing long 30mm, an xsect is the foursquare Al7075-T651 aluminium alloy cutting sample 8 of length of side 6mm, and will cut sample 8 be installed in the cutting slide rail 7 on, guarantee that by regulating spacer pin 9 and limited block 12 cutting depth between cutting tool 11 and the cutting sample 8 is 200 μ m, at last constraint fixed block 10 is fixed on by being threaded on the cutting bearing 5.
The loading speed of regulating Material Testing Machine is 600 μ m/min, is the quasistatic cutting experiment of 10 μ m/s to guarantee cutting speed.
As shown in Figure 2, the experimental provision integral body that installation is adjusted is placed on the worktable of Material Testing Machine, makes to load limit base over against the levelling joint 4 of Material Testing Machine.
Adjust the acquisition parameters of video camera, prepare the working angles of record quasistatic constraint cutting.
Start Material Testing Machine, begin to carry out quasistatic constraint cutting experiment.Load pressure head 3 by horizontal joint 4, load after limit base 6 and cutting slide rail 7 transmit loading forces, at last by cutting tool 11 cutting cutting samples 8, cutting sample 8 is with the gap outflow of chip formation via 12 of cutting tool 11 and limited blocks.Load after limit base 6 touches cutting bearing 5, the constraint working angles stops, and collects smear metal and also inlays sample, polishing, corrosion, observes under optical microscope, and the smear metal actual (real) thickness that obtains retraining cutting is 200 μ m, and material internal crystal grain obtains refinement.
Shear strain when being 200 μ m by retraining cutting shear strain formula and shear strain rate formula, obtaining retraining thickness is 2, and shear strain rate is 1S
-1
Example 2
Under the constant substantially situation of all the other parameters, changing the thickness of adjusting pad is 300 μ m, can realize that finally shear strain is 2.17 in keeping examples of implementation 1, and shear strain rate is about 1S
-1
Example 3
Under the constant substantially situation of all the other parameters, changing the thickness of adjusting pad is 400 μ m, can realize that finally shear strain is 2.5 in keeping examples of implementation 1, and shear strain rate is about 1S
-1
Example 4
Under the constant substantially situation of all the other parameters, changing the thickness of adjusting pad is 500 μ m, can realize that finally shear strain is 2.9 in keeping examples of implementation 1, and shear strain rate is about 1S
-1
Example 5
Under the constant substantially situation of all the other parameters, changing the thickness of adjusting pad is 600 μ m in keeping examples of implementation 1, and at this moment, limited block 12 has formed smear metal not to have been influenced, and has been the situation of free cutting.
It is to be noted: the structural parameters of each parts of the present invention and position relation are not limited to above example, can make corresponding adjustment according to the experiment needs of reality fully.
The present invention obtains the cutting speed of 1 μ m/s～20 μ m/s by the loading speed of regulating Material Testing Machine, thereby can hang down the quasistatic cutting experiment of rate of strain, again by regulating the cutting tool plastic yield degree different with the spacing acquisition between cutting sample attaching means, thereby can utilize experimental provision of the present invention to hang down the quasistatic constraint cutting experiment of rate of strain, for the relation of research material between different plastic degree under the low rate of strain and material microstructure develop creates conditions, and then be able to research material and hanging down under the rate of strain different plastic degree to the influence of material mechanical performance.
The present invention is simple in structure, easy to operate, can just make the material production severe plastic deformation by cutting at one time, and the plastic yield degree is controlled, having solved the corresponding problem that prior art exists, is the gedanken experiment apparatus of research material rule between different plastic degree and material microstructure develop under the low rate of strain.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the quasistatic based on the Material Testing Machine loading technique retrains the cutting experiment device, it is characterized in that: it comprises the cutting bearing, the cutting slide rail, cutting tool and cutting sample attaching means, the center of described cutting bearing offers the cutting operation space, and offer the horizontal mounting hole and the vertical mounting hole that lead to the cutting operation space on its horizontal vertical both direction respectively, described cutting slide rail is slidably mounted in vertical mounting hole, the one end stretches in the cutting operation space, and at this end the cutting sample is installed, the other end places outside the cutting bearing, to be used for transmitting the loading force of Material Testing Machine, described cutting tool is installed in the horizontal mounting hole directly or indirectly, its cutter head stretches in the cutting operation space, and place on the cutting path of cutting sample front end, described cutting sample attaching means is arranged on the cutting bearing directly or indirectly, and be close to the side of cutting the sample front portion, to prevent that cutting sample departs from cutting path because of stress deformation in working angles.
2. the quasistatic based on the Material Testing Machine loading technique as claimed in claim 1 retrains the cutting experiment device, it is characterized in that: it also comprises the constraint fixed block, described cutting tool is installed on this constraint fixed block, and this constraint fixed block is installed in the horizontal mounting hole of described cutting bearing.
3. the quasistatic based on the Material Testing Machine loading technique as claimed in claim 2 retrains the cutting experiment device, it is characterized in that: described cutting sample attaching means is made of limited block and spacer pin, described limited block adjustable ground is installed on the described constraint fixed block, described spacer pin adjustable ground be installed on the described cutting bearing with described limited block over against horizontal mounting hole in.
4. the quasistatic constraint cutting experiment device based on the Material Testing Machine loading technique as claimed in claim 3 is characterized in that: also be provided with the adjustment pad of regulating the two gap on the described constraint fixed block between cutting tool and limited block.
5. the quasistatic based on the Material Testing Machine loading technique as claimed in claim 1 retrains the cutting experiment device, and it is characterized in that: described cutting bearing is cuboid.
6. the quasistatic based on the Material Testing Machine loading technique as claimed in claim 1 retrains the cutting experiment device, and it is characterized in that: described cutting tool is provided with the sensor for detection of cutting force in the working angles.
7. the quasistatic based on the Material Testing Machine loading technique as claimed in claim 1 retrains the cutting experiment device, it is characterized in that: described cutting bearing is provided with for the camera head of measuring the working angles deformation field in real time.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109900534A (en) * | 2019-02-27 | 2019-06-18 | 北京市理化分析测试中心 | A kind of preparation method of carbon fiber boundling sample preparation device and carbon fiber boundling |
| CN114472560A (en) * | 2021-12-22 | 2022-05-13 | 中国电力科学研究院有限公司 | Wire single line drawbench |
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| JP2002310871A (en) * | 2001-04-19 | 2002-10-23 | Nitto Denko Corp | Cutting workability observing device for sheet-like object and cutting workability observing method for sheet-like object |
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| JP2002310871A (en) * | 2001-04-19 | 2002-10-23 | Nitto Denko Corp | Cutting workability observing device for sheet-like object and cutting workability observing method for sheet-like object |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900534A (en) * | 2019-02-27 | 2019-06-18 | 北京市理化分析测试中心 | A kind of preparation method of carbon fiber boundling sample preparation device and carbon fiber boundling |
| CN109900534B (en) * | 2019-02-27 | 2023-09-01 | 北京市理化分析测试中心 | Carbon fiber bundling sample preparation device and carbon fiber bundling preparation method |
| CN114472560A (en) * | 2021-12-22 | 2022-05-13 | 中国电力科学研究院有限公司 | Wire single line drawbench |
| CN114472560B (en) * | 2021-12-22 | 2023-12-08 | 中国电力科学研究院有限公司 | Wire single-wire drawing machine |
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