CN101487780A - Method and apparatus for detecting non-work directional performance of medium plate - Google Patents
Method and apparatus for detecting non-work directional performance of medium plate Download PDFInfo
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- CN101487780A CN101487780A CNA2008100802242A CN200810080224A CN101487780A CN 101487780 A CN101487780 A CN 101487780A CN A2008100802242 A CNA2008100802242 A CN A2008100802242A CN 200810080224 A CN200810080224 A CN 200810080224A CN 101487780 A CN101487780 A CN 101487780A
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Abstract
The invention relates to a method and a device for detecting the performance of a medium-heavy plate in the non-working direction, belonging to the technical field of a detection method and a detection device. The proposal of the invention aims at providing a method which can detect the non-working direction performance of the medium-heavy plate and a detection mould. The method comprises the following steps of: cutting out a rectangular specimen vertical to the surface direction from a medium-heavy plate; putting the specimen into a shear testing device; starting the shear device to shear and cut the specimen off; shearing the specimens in different positions and thickness; and measuring the shearing force and calculating the shearing resistance. The detection mould consists of a fixed shearing base and a movable shearing plate; a horizontal specimen slot is arranged in the middle part of the fixed shearing base; one end of the specimen slot is connected with a vertical shearing plate sliding groove; the shearing plate sliding groove is matched with the movable shearing plate; and a compression bolt is communicated with the upper part of the specimen slot. The invention discloses a new method for detecting the medium-heavy plate material; the method can quantitatively evaluate the performance of the medium-heavy plate in the non-working direction; and the detection mould used is simple and practical and also convenient for popularization.
Description
Technical field
The present invention relates to a kind of method of cut deal non-work directional performance and pick-up unit that this method is used of detecting, belong to detection method and checkout equipment technical field.
Background technology
Cut deal is meant thickness greater than 5 millimeters steel plate, and the ga(u)ge of plate directional performance is called Z to performance in some file, just non-work directional performance.The standard of China's mensuration cut deal thickness directional properties has only one at present---and Z is to (thickness direction) performance steel plate.This standard code behind the thickness direction of steel plate intercepting sample, through making tensile sample, is carried out tension test, and measures reduction of area on the tensile sample rupture surface, reach 15% as reduction of area, then is called Z15.Following state appears in such steel plate under many circumstances: the conventional mechanical property check is all qualified, but occurs scrapping owing to thickness directional properties is defective in process.This phenomenon explanation, the conventional mechanical property index can not determine usability fully.
The non-work directional performance of construction material refers to scantling and is not the main stress direction in shape, for example for line, bar along the diametric(al) of its transversal section, the thickness direction of sheet material, the interlayer bonding position of laminar composite etc.Have under many situations,, or do not reach expected life because the non-work directional performance of material far below conventional mechanical property, makes material or the member can not trouble free service.Also do not detect the method for non-work directional performance at present for ferrous materials, this is related to correct evaluating material and correct selection material.With regard to cold heading technique, cold upset forming is the important method of metal forming.The production process of product such as widely used fastener bolt in Aero-Space, machinery, instrument and equipment and engineering structure.The check of this performance does not have other examinaing method at present except the cold upsetting test method of steel.For medium plate, have only standard of GB/T5313 " thickness directional properties steel plate ", measure material non-work directional performance aspect and also lack appropriate means.Existing measurement conventional mechanical property method often not only can not provide the correct evaluation in non-work directional performance aspect, even also often does the conclusion that makes mistake.
In addition, the understanding of metal flow problem when the right cylinder sample compresses is not exclusively correct so far.Most typical situation is the conclusion of calculating with finite element strain analysis method.This conclusion points out that during right cylinder compression deformation, each unit makes right cylinder become bulge shape through similar distortion in the metal.But in fact to the dissection and analysis explanation of the sample inner clamps foreign material of jumping-up, the distortion of snotter in most cases, snotter occurs significantly folding and separates, or moves to the edge.
Cut deal is after clod wash processing, the situation that stratiform striped or performance inconsistency lattice appear in the side also detects under the standard compliant situation at traditional performance and occurs, and non-work directional performance is defective just causes.
The nonaffine deformation of microcosmos area often appears in metal material when distortion, this also is one of reason that causes non-work directional performance decline.
On sample, can prove the weak phenomenon of non-work directional performance with simple test.With the circular cone pressure head of certain angle, be pressed into the top of round steel sample, obtain an impression, when compression distance is enough big, at weak part (the perhaps closer place of the isolated edge) cracking of round steel.When same test was carried out in the side of sheet material, although impression is closer from the edge of sheet material, the place of cracking was not at plate surface around the impression, but along the length direction of sheet material, outwards expanded from indentation edge.Crackle has illustrated the difference of non-work directional performance and traditional performance in the multi-form trend in impression next door.
Also begin to give significant concern for non-work directional performance in the world at present.The instrumentation detection technique is also constantly prepared to include in the various standards to apply.It is many to be used to study the work of doing aspect the binding ability check of compound substance in field of compound material, but does not also form the systematic research scale, does not therefore also have corresponding results and test method, equipment to come out.
Summary of the invention
Technical matters to be solved by this invention provides a kind of method and pick-up unit that can detect the cut deal non-work directional performance easily.
The technical scheme that solves the problems of the technologies described above is:
A kind of method that detects the cut deal non-work directional performance, it adopts following steps to carry out:
(1). intercepting is perpendicular to the rectangular specimen of surface direction on cut deal;
(2). rectangular specimen is put into shearing test device clamp, be fixed on the shearing work platform, the inoperative direction of rectangular specimen is perpendicular to accurate shear direction;
(3). start shear, shear cutlery from rectangular specimen being sheared and cut off perpendicular to rectangular specimen inoperative direction;
(4). measure and record shearing force data, calculate the shearing drag, i.e. shear resistance.
The method of above-mentioned detection cut deal non-work directional performance, the computing formula of described shearing drag is:
In the formula, σ
Xy-shear resistance, unit is MPa; P-used the load of shearing separating sample, unit is N; The area of S-sample bearing load, unit are mm
2A-sample thickness, unit are mm; B-specimen width, unit are mm.
A kind of employed pick-up unit of method of above-mentioned detection cut deal non-work directional performance, it is by deciding Cut Block and moving shear plate is formed, decide on the worktable that Cut Block is fixed on shear, moving shear plate is installed in the mobile shearing anchor clamps of shear, there is the sample jack of horizontal direction at the middle part of deciding Cut Block, the width of sample jack is corresponding with the cross section of rectangular specimen with height, one end of sample jack connects vertical shear plate sliding tray, shear plate sliding tray and moving shear plate are complementary, and are communicated with to compress the hold-down bolt that sample is used above the sample jack.
The another kind of method that detects the cut deal non-work directional performance of the present invention, it adopts following steps to carry out:
(1). intercepting is perpendicular to the rectangular specimen of surface direction on cut deal;
(2). rectangular specimen is put into awl forge test unit, be fixed on the worktable, the inoperative direction face (sheet material side) of rectangular specimen is relative with the cone pressing mold that awl is forged test;
(3). start the awl forging device, make the cone pressing mold be pressed into the inoperative direction face of rectangular specimen;
(4). measure load and the compression distance apply, and the stress of crackle to occur corresponding with the sample side;
(5). to begin to occur the load N and the impression surface area mm of crackle correspondence
2Ratio, the quantitative evaluation test findings.
The employed pick-up unit of method of above-mentioned detection cut deal non-work directional performance, it is made up of pressure stand and pressure mould, the pressure stand comprises stand, pressure handle, pressure detection and display device, pressure mould chuck, worktable, its improvements are, pressure mould is the cone pressing mold, and the coning angle θ of cone pressing mold working end is 30 °-120 °.
Test unit provided by the invention can be measured on the various devices of loading parameters with existing Material Testing Machine or other at an easy rate and realize detecting cut deal and other compound substance non-work directional performance.
The method of detection cut deal non-work directional performance of the present invention is to carry out pure shear in the surperficial parallel direction of cut deal, and the cone that utilizes certain taper is pressed into the inoperative direction face of cut deal, analyze the performance of materials such as cut deal in the inoperative direction with this, can obtain through these tests: the distortion of materials rule, deformation velocity, deformation extent, corresponding relation between the die parameters, further conclude the relation of bringing up between conventional mechanical property and the non-work directional performance, thereby set up the method and the standard that detect the cut deal non-work directional performance, improve the evaluation of material system, give full play to the material property potentiality.The present invention has opened up the new method that detects the cut deal material, can the quantitative evaluation cut deal in the performance of inoperative direction, employed detection mould is simple and practical, be convenient to promote the use of.
Description of drawings
Fig. 1 is the apparatus structure synoptic diagram of the detection cut deal non-work directional performance of shear test use of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the device synoptic diagram that awl of the present invention is forged the detection cut deal non-work directional performance of test use;
Fig. 4 is that awl of the present invention is forged the cone pressing mold synoptic diagram that test is used.
Mark is as follows among the figure: hold-down bolt 1, sample pressure strip 2, sample jack 3, rectangular specimen 4, decide Cut Block 5, moving shear plate 6, moving shear plate chute 7, cone pressing mold 8
Embodiment
Core technology of the present invention is to adopt shearing test method, detects ga(u)ge of plate directional performance or non-work directional performance.Cut deal is not good owing to thickness directional properties in brake forming or process, produce layering or cracking, its main cause be the thickness direction upper strata with layer between combine strong inadequately, in BENDING PROCESS, be subjected to shearing force to cause inefficacy, must determine anti-shear ability on the cut deal thickness direction at such failure mode.
The present invention from thickness greater than the rectangular specimen of 5 millimeters cut deal intercepting perpendicular to the surface of steel plate direction, with sample holder in deciding the sample jack of Cut Block, requirement with clipped position clamps sample, moving shear plate is put into the moving shear plate chute of deciding Cut Block, adopt universal testing machine, imposed load.Accurately measure the load that applies in the process of the test, obtain shear resistance divided by load with the sectional area of sample.
Change rectangular specimen, shear at the different parts of rectangular specimen, measure and record shearing force data, data illustrate the anti-shear ability difference of cut deal along thickness direction respectively; Also the rectangular specimen of replaceable different-thickness is sheared according to the method described above, measures and record shearing force data; So that the foundation of sample thickness is determined in conduct when the standardization in future is checked; To each sample and each time Calculation of Shear go out to shear drag, i.e. shear resistance.
When intercepting sample on cut deal, rolling direction is directions X, and thickness direction is the Z direction.The size of sample, thickness a and width b are the major parameters in the shear test.We fix the width b of sample generally speaking, change the thickness a of sample, by measuring, calculate then to shear between drag and the thickness and concern.If shearing the used load of separating sample is P, then the area S of sample bearing load obtains the sample shear resistance thus
This index can be used for judging or estimate the difference of cut deal at the Z directional performance.In the formula, σ
Xy-shear resistance, unit is MPa; P-used the load of shearing separating sample, unit is N; The area of S-sample bearing load, unit are mm
2A-sample thickness, unit are mm; B-specimen width, unit are mm.
The present invention adopts two kinds to detect the device of cut deal non-work directional performance and the non-work directional performance of two groups of mould test material.
First kind of device that detects the cut deal non-work directional performance can claim shearing test device, and the shearing die that is adopted is by deciding Cut Block 5 and moving shear plate 6 is formed.Decide the sample jack 3 that there is the horizontal direction of placing rectangular specimen 4 at Cut Block 5 middle parts, place rectangular specimen 4 in the sample jack 3 and clamp by the hold-down bolt 1 and the sample pressure strip 2 of top afterwards, so that moving shear plate 6 is sheared.The position that rectangular specimen 4 is sheared can be determined by the length that rectangular specimen 4 stretches out.Deciding Cut Block 5 has the moving shear plate chute 7 of vertical direction, can make shear plate 6 that sliding motion vertically takes place within it.Rectangular specimen 4 will move shear plate 6 and be pressed into along chute on deciding Cut Block 5 after the fixation, shear and also cut off sample, measure shearing force, calculate the shearing drag, or be called shear resistance.Shear can carry out shear test with universal testing machine, also can adopt other accurately to measure the device of imposed load.
Second kind of device that detects the cut deal non-work directional performance can claim awl to forge test unit, employing be cone pressing mold 8.Be pressed into the inoperative direction face of cut deal during test with the cone pressing mold 8 with coning angle θ, measure the load and the compression distance that apply, and the stress of crackle to occur corresponding with the sample face, load and related data that the quantitative evaluation test cracks.(vertex angle theta and pressure head compression distance by cone obtain the impression surface area).To begin to occur the load N and the impression surface area mm of crackle correspondence
2Ratio, the quantitative evaluation test findings;
Cone pressing mold 8 can be connected in the deck of compression section of universal testing machine easily, also can adopt other can accurately measure the device of imposed load.
Claims (5)
1. a method that detects the cut deal non-work directional performance is characterized in that, it adopts following steps to carry out:
(1). intercepting is perpendicular to the rectangular specimen of surface direction on cut deal;
(2). rectangular specimen is put into shearing test device clamp, be fixed on the shearing work platform, inoperative side's sentence of rectangular specimen is perpendicular to accurate shear direction;
(3). start shear, shear cutlery from rectangular specimen being sheared and cut off perpendicular to rectangular specimen inoperative direction;
(4). measure and record shearing force data, calculate shear resistance.
2. the method for detection cut deal non-work directional performance according to claim 1 is characterized in that, the computing formula of described shear resistance is:
In the formula, σ
Xy-shear resistance, unit is MPa; P-used the load of shearing separating sample, unit is N; The area of S-sample bearing load, unit are mm
2A-sample thickness, unit are mm; B-specimen width, unit are mm.
3. device of the employed detection cut deal of detection method non-work directional performance as claimed in claim 1 or 2, it is characterized in that, it is by deciding Cut Block [5] and moving shear plate [6] is formed, deciding Cut Block [5] is fixed on the worktable of shear, moving shear plate [6] is installed in the mobile shearing anchor clamps of shear, there is the sample jack [3] of horizontal direction at the middle part of deciding Cut Block [5], the width of sample jack [3] is corresponding with the cross section of rectangular specimen [4] with height, one end of sample jack [3] connects vertical shear plate sliding tray [7], shear plate sliding tray [7] is complementary with moving shear plate [6], is communicated with hold-down bolt [1] in the top of sample jack [4].
4. a method that detects the cut deal non-work directional performance is characterized in that, it adopts following steps to carry out:
(1). intercepting is perpendicular to the rectangular specimen of surface direction on cut deal;
(2). rectangular specimen is put into awl forge test unit, be fixed on the worktable, the inoperative direction face of rectangular specimen is relative with the cone pressing mold that awl is forged test;
(3). start the awl forging device, make the cone pressing mold be pressed into the inoperative direction face of rectangular specimen;
(4). measure load and the compression distance apply, and the stress of crackle to occur corresponding with the sample side;
(5). to begin to occur the load N and the impression surface area mm of crackle correspondence
2Ratio, the quantitative evaluation test findings.
5. device as the employed detection cut deal of detection method non-work directional performance as described in the claim 4, it is characterized in that, it is made up of pressure stand and pressure mould, the pressure stand comprises stand, pressure handle, pressure detection and display device, pressure mould chuck, worktable, it is characterized in that, pressure mould is cone pressing mold [8], and the coning angle θ of cone pressing mold [8] working end is 30 °-120 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100802242A CN101487780A (en) | 2008-12-26 | 2008-12-26 | Method and apparatus for detecting non-work directional performance of medium plate |
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| CNA2008100802242A CN101487780A (en) | 2008-12-26 | 2008-12-26 | Method and apparatus for detecting non-work directional performance of medium plate |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502205A (en) * | 2014-12-17 | 2015-04-08 | 上海应用技术学院 | Rigid alloy soldered joint shearing property testing device |
| CN106289970A (en) * | 2016-07-28 | 2017-01-04 | 大唐微电子技术有限公司 | A kind of chip external force resistance test device and method of testing thereof |
| CN108982248A (en) * | 2018-07-19 | 2018-12-11 | 沪东中华造船(集团)有限公司 | A method of the Shear Strength of Composite Materials is test using experimental rig |
| CN110031344A (en) * | 2018-01-24 | 2019-07-19 | 中国科学院金属研究所 | A kind of material shear fatigue performance test methods |
| CN111351720A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for shearing detection of annular fuel assembly guide pipe |
| CN112665489A (en) * | 2020-12-15 | 2021-04-16 | 上海市建筑科学研究院有限公司 | Method for measuring position and size of wood joist in brick-wood structure building |
| CN112730045A (en) * | 2020-12-21 | 2021-04-30 | 中南大学 | Shearing clamp and application method thereof |
| CN112730024A (en) * | 2020-12-07 | 2021-04-30 | 西南交通大学 | Integrated device for testing compression and shearing performance of rock material |
| CN114184499A (en) * | 2021-12-09 | 2022-03-15 | 成都成维精密机械制造有限公司 | Brazing assembly mechanical property testing tool |
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- 2008-12-26 CN CNA2008100802242A patent/CN101487780A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502205A (en) * | 2014-12-17 | 2015-04-08 | 上海应用技术学院 | Rigid alloy soldered joint shearing property testing device |
| CN106289970A (en) * | 2016-07-28 | 2017-01-04 | 大唐微电子技术有限公司 | A kind of chip external force resistance test device and method of testing thereof |
| CN110031344A (en) * | 2018-01-24 | 2019-07-19 | 中国科学院金属研究所 | A kind of material shear fatigue performance test methods |
| CN108982248A (en) * | 2018-07-19 | 2018-12-11 | 沪东中华造船(集团)有限公司 | A method of the Shear Strength of Composite Materials is test using experimental rig |
| CN108982248B (en) * | 2018-07-19 | 2020-08-07 | 沪东中华造船(集团)有限公司 | Method for testing shear strength of composite material by using test device |
| CN111351720A (en) * | 2018-12-20 | 2020-06-30 | 中核北方核燃料元件有限公司 | Device and method for shearing detection of annular fuel assembly guide pipe |
| CN111351720B (en) * | 2018-12-20 | 2022-12-20 | 中核北方核燃料元件有限公司 | Device and method for shearing detection of annular fuel assembly guide pipe |
| CN112730024B (en) * | 2020-12-07 | 2022-05-17 | 川南城际铁路有限责任公司 | Integrated device for testing compression and shearing performance of rock material |
| CN112730024A (en) * | 2020-12-07 | 2021-04-30 | 西南交通大学 | Integrated device for testing compression and shearing performance of rock material |
| CN112665489A (en) * | 2020-12-15 | 2021-04-16 | 上海市建筑科学研究院有限公司 | Method for measuring position and size of wood joist in brick-wood structure building |
| CN112665489B (en) * | 2020-12-15 | 2023-11-21 | 上海市建筑科学研究院有限公司 | Method for measuring position and size of wood joist in brick-wood structure building |
| CN112730045A (en) * | 2020-12-21 | 2021-04-30 | 中南大学 | Shearing clamp and application method thereof |
| CN114184499A (en) * | 2021-12-09 | 2022-03-15 | 成都成维精密机械制造有限公司 | Brazing assembly mechanical property testing tool |
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