CN105388052A - Notch sample preparation device used for PENT test - Google Patents
Notch sample preparation device used for PENT test Download PDFInfo
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- CN105388052A CN105388052A CN201510725852.1A CN201510725852A CN105388052A CN 105388052 A CN105388052 A CN 105388052A CN 201510725852 A CN201510725852 A CN 201510725852A CN 105388052 A CN105388052 A CN 105388052A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The invention relates to the field of notch sample preparation devices and aims at providing a notch sample preparation device used for a PENT test. The notch sample preparation device used for the PENT test comprises a fixing component and a cutting component, the fixing component is used for fixing a sample through a sample clamping block, and the cutting component is used for conducting notching on the sample through an external tensile machine. According to the notch sample preparation device, the sample can be located in the two vertical directions of the horizontal plane through a sliding groove block, the sample clamping block, a front locating plate, a rear locating plate and locating screws, and position accuracy of a notch is guaranteed; the extending height of a blade of a notching knife is adjusted through a toolsetting screw, a dial gauge is used in a matched mode, adjustability and accuracy of the depth of the sample notch are guaranteed, and universality of the sample preparation device for samples of different sizes is enhanced.
Description
Technical field
The invention relates to otch sample preparation device field, particularly for the otch sample preparation device of PENT experiment.
Background technology
Polyethylene pipe good toughness, shock resistance, corrosion-resistant, and long service life, operation energy consumption and maintenance cost are low, obtain increasing application in fields such as oil, chemical industry, municipal administrations.Due to can the defects such as cut be caused unavoidably in production, work progress, make pipeline in normal service process, produce stress to concentrate, and polythene material has viscoelasticity property, therefore Slow Crack becomes the dominant failure mode of polyvinyl piping materials under normal service condition, and this failure mode is also the emphasis that scholars pay close attention to.
It is be main proposition with professor Brown of the University of Pennsylvania that PENT (PennsylvaniaNotchTest) tests, this method of testing has included U.S. material and test association criterion (ASTMF1473-11StandardTestMethodforNotchTensileTesttoMeasu retheResistancetoSlowCrackGrowthofPolyethylenePipesandRe sins) in, adopting the method can predict the anti-Slow Crack ability of polyvinyl piping materials comparatively quickly and efficiently, is one of main method of research Slow Crack.Describe PENT experimental technique in standard in detail, comprise the drawing materials of sample, size, otch pattern, the temperature of loading procedure and the control etc. of magnitude of load.Wherein, precision prepared by sample otch affects process and the result evaluation of whole experiment to a great extent, therefore has strict requirement to otch in standard.Size aspect, the sample of regulation different size has different notch depths, and notch depth control errors is at ± 0.01mm; Aspect, position, need control main otch and secondary otch at grade; Require that feed velocity is less than 0.25mm/min, and cutter thickness should be 0.2mm simultaneously.
Current breach sampling machine both domestic and external major part for be the preparation of impact experiment various sample breach, precision, stability and accuracy do not reach the sample requirement of PENT experiment, also do not have a kind of device can prepare the otch required in PENT experiment quickly and accurately.Therefore, invent a kind of can prepare and meet PENT and test the device that requires of otch completely newly, the research work for polyethylene pipe Slow Crack has great importance, thus provides technical guarantee for the safe operation of polyvinyl piping materials.
Summary of the invention
Fundamental purpose of the present invention is to overcome deficiency of the prior art, provides a kind of can being used for make the device that polyvinyl piping materials PENT tests otch quickly and accurately.For solving the problems of the technologies described above, solution of the present invention is:
Be provided for the otch sample preparation device of PENT experiment, comprise fixture and cutting member, fixture is used for utilizing sample fixture block to fix sample, cutting member carries out otch scribing for utilizing outside puller system to sample, and described fixture comprises runner block, lateral pressing screw, fixture connecting plate, lower clamp handle, prelocalization plate, rear position plate, front binder screw; Described runner block is connected with puller system base by fixture connecting plate, and fixture connecting plate is connected with puller system base by lower clamp handle; Runner block has groove, for moving up and down in groove for the sliding cutter block in cutting member;
Described runner block, prelocalization plate, rear position plate, sample fixture block are connected by screw, for coordinating fixing sample: runner block is connected with sample fixture block by screw, sample fixture block and prelocalization plate, rear position plate are connected by screw, and the center of sample fixture block and prelocalization plate all has internal thread hole, be respectively used to be inserted in lateral pressing screw, front binder screw, realize the accurate location to sample two mutual vertical planes, ensure the positional precision of otch;
Described cutting member comprises sliding cutter block, toolsetting skewback, indentation blade, dial gauge, jackscrew, dial gauge measuring unit, pressure knife block, toolsetting screw, upper chuck arbor, ball cup, ball-head cover, ball rod, mount pin, locking mother; Described ball rod is connected with upper chuck arbor by ball cup, ball-head cover, and upper chuck arbor is fixed with puller system crossbeam by mount pin, locking mother;
Described sliding cutter block is connected with ball rod, and sliding cutter block can be moved up and down with puller system crossbeam; Sliding cutter block has knife holder slot, for placing toolsetting skewback, pressure knife block, indentation blade; Described indentation blade has (being similar to) elliptical aperture, and utilizes screw by elliptical aperture, realizes the connection of indentation blade and sliding cutter block, indentation blade can be moved along elliptical aperture long axis direction, realize moving horizontally of indentation blade; (i.e. indentation blade longitudinally fixed by pressure knife block) is located by pressure knife block respectively in the both sides of indentation blade, and the knife back of indentation blade is by the contour localization (i.e. indentation blade laterally across toolsetting skewback location) of toolsetting skewback; Described toolsetting skewback realizes the movement (namely the lengthwise position of toolsetting skewback is regulated by toolsetting screw) on vertical direction by toolsetting screw, and by the inclined-plane of toolsetting skewback, the vertical motion of toolsetting skewback can be converted into moving horizontally of pressure knife block and indentation blade;
Described dial gauge is equipped with dial gauge measuring unit, and is fixed by jackscrew, ensure between dial gauge and dial gauge measuring unit without relative movement; Dial gauge stretches out height (i.e. pressure block and indentation blade move horizontally distance) for what determine indentation knife-blade, and then the notch depth of control indentation blade on sample; Dial gauge measuring unit directly contacts with indentation blade when measuring, for the protection of dial gauge (dial gauge only uses as survey instrument when finding range, and does not have fixed position).
As further improvement, between the lateral pressing screw of described sample fixture block and sample, be provided with lateral pressing cushion block, for ensureing that sample is not subject to outside destroy in otch preparation process.
As further improvement, on described indentation blade, the major axis of (being similar to) elliptical aperture and horizontal line exist that (angle, makes the movement along major axis be converted into and move horizontally; And this angle is at about 8 ° (preferably 8 °), move horizontally for ensureing to be converted into along the mobile energy major part of major axis.
As further improvement, after regulating toolsetting screw, the height that stretches out that can control bottom indentation knife-blade changes between 0 ~ 4mmm.
As further improvement, described sliding cutter block is provided with two graticules, be that indentation blade scribing sample workspace is (when sample fixture block top is at the moment in trace blade scribing sample workspace in graticule, the speed of puller system controls in 0.25mm/min, when sample fixture block top is at the moment outside trace blade scribing sample workspace, can suitably improve puller system speed, shorten the sample preparation time).
As further improvement, described otch sample preparation device also comprises sample fixture block, and when preparing the sample otch of different size, can change the sample fixture block of corresponding specification.
Principle of work of the present invention: fixture is positioned two of sample surface level vertical direction by binder screw, ensure that cut-out direction is parallel with bottom sample and lead, side otch is at same plane; Blade realizes the accurate control to blade projecting height by toolsetting screw and dial gauge, thus ensures that the dimensional accuracy of sample otch meets standard-required.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention realizes the location in two vertical direction on sample surface level by runner block, sample fixture block, front and back location-plate and dog screw, ensures the positional precision of otch;
2, front and back location-plate is threaded with sample fixture block, can conveniently sample, setting-out;
3, sample fixture block is threaded with runner block, can realize preparing the otch of different size sample by the specification changing sample fixture block;
4, indentation blade stretches out height by toolsetting screw adjustment blade, and coordinates dial gauge to use, and ensures adjustability and the accuracy of sample notch depth, adds the versatility of sample preparation device to different size sample;
5, indentation blade is threaded with sliding cutter block, easy disassembly;
6, whole otch sample preparation device coordinates puller system to use, and can ensure that the scribing speed of cutter meets below the 0.25mm/min of standard-required.
Accompanying drawing explanation
Fig. 1 is the structural representation of the specific embodiment of the invention.
Fig. 2 is left view of the present invention in Fig. 1.
Fig. 3 is the sample fixture block schematic diagram that sample 50 × 25 × 10mm is corresponding.
Fig. 4 is the sample fixture block schematic diagram that sample 100 × 10 × 10mm is corresponding.
Reference numeral in figure is: chuck arbor on 1; 2 mount pins; 3 lockings are female; 4 ball cups; 5 ball-head covers; 6 ball rods; 7 runner blocks; 8 sample fixture blocks; 9 samples; 10 lateral pressing cushion blocks; 11 lateral pressing screws; 12 sliding cutter blocks; 13 toolsetting skewbacks; 14 indentation blades; 15 dial gauges; 16 jackscrews; 17 dial gauge measuring units; 18 pressure knife blocks; 19 toolsetting screws; 20 fixture connecting plates; 21 lower clamp handles; 22 prelocalization plates; 23 rear position plates; Binder screw before 24; 25 hex screws.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
The following examples can make professional and technical personnel's comprehend the present invention of this specialty, but do not limit the present invention in any way.
Sample to be detected: according to ASTMF1473-11 requirement, can be formed by tygon starting material pressing mold, and also axially can cut sample along polyvinyl piping materials, typical sample is of a size of 50 × 25 × 10mm.
The otch sample preparation device for PENT experiment as shown in Figure 1 and Figure 2 comprises fixture and cutting member, and fixture is used for fixing sample 9, and cutting member is used for carrying out otch scribing to sample 9.
Fixture comprises runner block 7, lateral pressing screw 11, fixture connecting plate 20, lower clamp handle 21, prelocalization plate 22, rear position plate 23, front binder screw 24, sample fixture block 8.Described runner block 7 is connected with puller system base by fixture connecting plate 20, and fixture connecting plate 20 is connected with puller system base by lower clamp handle 21.Runner block 7 has groove, for moving up and down in groove for the sliding cutter block 12 in cutting member.
Described runner block 7, prelocalization plate 22, rear position plate 23, sample fixture block 8 are connected by screw, for coordinating fixing sample 9: runner block 7 is connected with sample fixture block 8 by screw, sample fixture block 8 is respectively connected by two screws with prelocalization plate 22, rear position plate 23, and the center of sample fixture block 8 and prelocalization plate 22 all has internal thread hole, be respectively used to be inserted in lateral pressing screw 11, front binder screw 24, realize the accurate location to sample 9 two mutual vertical planes, ensure the positional precision of otch.Lateral pressing cushion block 10 is also provided with, for ensureing that sample 9 is not subject to outside destroy in otch preparation process between the lateral pressing screw 11 of sample fixture block 8 and sample 9.
Sample fixture block 8 has plurality of specifications, and when sample 9 change in size, sample fixture block 8, Fig. 3 and the Fig. 4 that need change different size are the sample fixture block that two kinds of gauge coupons (50 × 25 × 10mm and 100 × 10 × 10mm) are corresponding respectively.The laying method of sample 9 is, unclamps the screw on prelocalization plate 22, can pull down prelocalization plate 22, puts into sample 9.
Cutting member comprises sliding cutter block 12, toolsetting skewback 13, indentation blade 14, dial gauge 15, jackscrew 16, dial gauge measuring unit 17, pressure knife block 18, toolsetting screw 19, upper chuck arbor 1, ball cup 4, ball-head cover 5, ball rod 6, mount pin 2, locking female 3.Described ball rod 6 is connected with upper chuck arbor 1 by ball cup 4, ball-head cover 5, and upper chuck arbor 1 is fixed with puller system crossbeam by mount pin 2, locking female 3.Described sliding cutter block 12 is connected with ball rod 6, and sliding cutter block 12 can be moved up and down with puller system crossbeam.
Sliding cutter block 12 has knife holder slot, for placing toolsetting skewback 13, pressure knife block 18, indentation blade 14.Described indentation blade 14 has sub-elliptical hole, and cunning cutter block 12 and indentation blade 14 are connected together by this hole by screw, indentation blade 14 can be moved along hole long axis direction, realize moving horizontally of indentation blade 14, is also convenient to dismounting simultaneously.The both sides of indentation blade 14 are located by pressure knife block 18 respectively, and namely the longitudinal direction of indentation blade 14 is fixed by pressure knife block 18, the knife back of indentation blade 14 by the contour localization of toolsetting skewback 13, i.e. the locating laterally across toolsetting skewback 13 of indentation blade 14.Described toolsetting skewback 13 realizes the movement on vertical direction by toolsetting screw 19, namely the lengthwise position of toolsetting skewback 13 is regulated by toolsetting screw 19; And by the inclined-plane of toolsetting skewback 13, the vertical motion of toolsetting skewback 13 can be converted into moving horizontally of pressure knife block 18 and indentation blade 14, and the stretching out height that can control bottom indentation blade 14 blade changes between 0 ~ 4mmm.Sliding cutter block 12 is provided with two graticules, during scribing, upper graticule arrives at sample fixture block 8 top to lower graticule and arrives in the interval at sample fixture block 8 top, for workspace, in this region, the speed of puller system controls in 0.25mm/min, outside this region, can suitably improve puller system speed, shorten the sample preparation time.
Described dial gauge 15 is equipped with dial gauge measuring unit 17; without relative movement between both being ensured by jackscrew 16; dial gauge measuring unit 17 and indentation blade 14 directly contact to protect dial gauge 15; dial gauge 15 for determine indentation blade 14 blade stretch out height; the i.e. distance that moves horizontally of pressure block 18 and indentation blade 14, and then control the notch depth of indentation blade 14 on sample 9.
In the present embodiment, the preparation of sample 9 otch is implemented according to following steps:
(1) the main otch of scribing: putting of sample 9 should be longitudinally 25mm, horizontal 10mm, after sample 9 is put well, tighten the lateral pressing screw 11 on sample fixture block 8, ensure that sample 9 is laterally fixing, the prelocalization plate 22 pulled down is fixed by screws on sample fixture block 8, tightens the front binder screw 24 on prelocalization plate 22, realize fixing in the horizontal plane in two vertical direction of sample 9.
Rotate toolsetting screw 19, coordinate the use of dial gauge 15, ensure to stretch out 3.5mm bottom indentation blade 14 blade.Start puller system, control puller system and be less than 0.25mm/min in perform region speed, sample 9 is carried out to the scribing of main otch.After pull-up process terminates, the screw outwarded winding on prelocalization plate 22, takes out sample 9, cunning cutter block 12 is down to elemental height with puller system crossbeam.
(2) the secondary otch of scribing: the method before following reapposes sample 9, now its disposing way is longitudinally 10mm, horizontal 25mm, and stretching out bottom adjustment indentation blade 14 blade is highly 1mm, sample 9 is carried out to the scribing of secondary otch.After scribing terminates, take out sample 9 with reference to the method in step (1); Reappose, need sample 9 to rotate 180 ° on the basis of a upper position; Fixing sample 9, the secondary otch of scribing another side.
Finally, it should be noted that above what enumerate is only specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, a lot of distortion can also be had.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (6)
1. for the otch sample preparation device of PENT experiment, comprise fixture and cutting member, fixture is used for utilizing sample fixture block to fix sample, cutting member carries out otch scribing for utilizing outside puller system to sample, it is characterized in that, described fixture comprises runner block, lateral pressing screw, fixture connecting plate, lower clamp handle, prelocalization plate, rear position plate, front binder screw; Described runner block is connected with puller system base by fixture connecting plate, and fixture connecting plate is connected with puller system base by lower clamp handle; Runner block has groove, for moving up and down in groove for the sliding cutter block in cutting member;
Described runner block, prelocalization plate, rear position plate, sample fixture block are connected by screw, for coordinating fixing sample: runner block is connected with sample fixture block by screw, sample fixture block and prelocalization plate, rear position plate are connected by screw, and the center of sample fixture block and prelocalization plate all has internal thread hole, be respectively used to be inserted in lateral pressing screw, front binder screw, realize the accurate location to sample two mutual vertical planes, ensure the positional precision of otch;
Described cutting member comprises sliding cutter block, toolsetting skewback, indentation blade, dial gauge, jackscrew, dial gauge measuring unit, pressure knife block, toolsetting screw, upper chuck arbor, ball cup, ball-head cover, ball rod, mount pin, locking mother; Described ball rod is connected with upper chuck arbor by ball cup, ball-head cover, and upper chuck arbor is fixed with puller system crossbeam by mount pin, locking mother;
Described sliding cutter block is connected with ball rod, and sliding cutter block can be moved up and down with puller system crossbeam; Sliding cutter block has knife holder slot, for placing toolsetting skewback, pressure knife block, indentation blade; Described indentation blade has elliptical aperture, and utilizes screw by elliptical aperture, realizes the connection of indentation blade and sliding cutter block, indentation blade can be moved along elliptical aperture long axis direction, realize moving horizontally of indentation blade; The both sides of indentation blade are located by pressure knife block respectively, and the knife back of indentation blade is by the contour localization of toolsetting skewback; Described toolsetting skewback realizes the movement on vertical direction by toolsetting screw, and by the inclined-plane of toolsetting skewback, the vertical motion of toolsetting skewback can be converted into moving horizontally of pressure knife block and indentation blade;
Described dial gauge is equipped with dial gauge measuring unit, and is fixed by jackscrew, ensure between dial gauge and dial gauge measuring unit without relative movement; Dial gauge for determining stretching out highly of indentation knife-blade, and then controls the notch depth of indentation blade on sample; Dial gauge measuring unit directly contacts with indentation blade, for the protection of dial gauge when measuring.
2. otch sample preparation device according to claim 1, is characterized in that, is provided with lateral pressing cushion block between the lateral pressing screw of described sample fixture block and sample, for ensureing that sample is not subject to outside destroy in otch preparation process.
3. otch sample preparation device according to claim 1, is characterized in that, on described indentation blade, the major axis of elliptical aperture and horizontal line exist angle, the movement along major axis can be converted into and move horizontally.
4. otch sample preparation device according to claim 1, is characterized in that, after regulating toolsetting screw, the height that stretches out that can control bottom indentation knife-blade changes between 0 ~ 4mmm.
5. otch sample preparation device according to claim 1, is characterized in that, described sliding cutter block is provided with two graticules, is indentation blade scribing sample workspace in graticule.
6. the otch sample preparation device according to claim 1 to 5 any one, is characterized in that, described otch sample preparation device also comprises sample fixture block, and when preparing the sample otch of different size, can change the sample fixture block of corresponding specification.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725852.1A CN105388052B (en) | 2015-10-30 | 2015-10-30 | Otch sample preparation device for PENT experiments |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725852.1A CN105388052B (en) | 2015-10-30 | 2015-10-30 | Otch sample preparation device for PENT experiments |
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| CN105388052A true CN105388052A (en) | 2016-03-09 |
| CN105388052B CN105388052B (en) | 2017-11-24 |
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