CN106370490B - A kind of test specimen initial crack reproducing unit and method - Google Patents
A kind of test specimen initial crack reproducing unit and method Download PDFInfo
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- CN106370490B CN106370490B CN201610766354.6A CN201610766354A CN106370490B CN 106370490 B CN106370490 B CN 106370490B CN 201610766354 A CN201610766354 A CN 201610766354A CN 106370490 B CN106370490 B CN 106370490B
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
- B26D1/157—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis
- B26D1/18—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable carriage
-
- 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
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The present invention relates to a kind of test specimen initial crack reproducing unit and methods, belong to test field of measuring technique.The device is for precrack and is copied to other testpieces, mainly includes mechanical shoulder cut-off knife tool (5), is used for circumgyration incision test specimen；Regulating mechanism, including transverse bar (2) and longitudinal rod (3), it is respectively used to adjust movement of the mechanical shoulder cut-off knife tool (5) on transverse direction and longitudinal direction direction, is provided with scale on the transverse bar (2) and longitudinal rod (3)；Bindiny mechanism, for mechanical shoulder cut-off knife tool to be rotatably connected on the adjustment structure., can be accurately by crackle batch duplicating to several testpieces by the crackle reproducing unit, duplication result is accurate, and efficiency is higher.
Description
Technical field
The invention belongs to test field of measuring technique, and in particular to a kind of test specimen initial crack reproducing unit and method.
Background technique
It is the accuracy of guarantee test result in carrying out verification experimental verification, needs to be tested using a large amount of testpieces,
A biggish sample size with same or similar structure is namely needed, to guarantee the accuracy of statistical analysis.Than
Such as in the damage tolerance performance test to the test specimen with crackle, if only tried a testpieces with the crackle
It tests, often because other reasons cause result error very big, for this reason, it may be necessary to damage to a large number of experiments part with identical crackle
Hurt tolerance test, finally obtains its damage tolerance performance by statistical analysis.
In the crack expansion test of test specimen, it is prefabricated not that the dispersibility of test result is largely due to initial crack
When related, especially flaw size feature is difficult accurately to be replicated.
Summary of the invention
To solve the above-mentioned problems, The present invention gives a kind of precracks, and the crackle is copied on other test specimens
Device and method.
Present invention firstly provides a kind of test specimen initial crack reproducing units, specifically include that
Mechanical shoulder cut-off knife tool, is used for circumgyration incision test specimen；
Regulating mechanism, including transverse bar and longitudinal rod are respectively used to adjust the mechanical shoulder cut-off knife tool in transverse direction and longitudinal direction
Movement on direction is provided with scale on the transverse bar and longitudinal rod；
Bindiny mechanism, for mechanical shoulder cut-off knife tool to be rotatably connected on the adjustment structure.
Preferably, it is provided with sliding rail on the transverse bar and longitudinal rod, one end of sliding block is placed in the sliding rail of transverse bar
Interior, the other end is placed in the sliding rail of longitudinal rod, and sliding rail is engaged with sliding block gear, and the transverse bar is horizontally placed on the test specimen
Side, the longitudinal rod connect mechanical shoulder cut-off knife tool by bindiny mechanism, and can when the mechanical shoulder cut-off knife has rotation,
Longitudinal rod is kept to be in plumbness.
In above scheme preferably, the diameter that the axis of the longitudinal rod has with the mechanical shoulder cut-off knife in parallel, and
Be arranged fluted on the longitudinal rod, the bindiny mechanism includes the bearing part for being built in the groove, the bearing part it is interior
Circle connects the rotation axis of the mechanical shoulder cut-off knife tool.
Preferably, one end of the longitudinal rod connects the mechanical shoulder cut-off knife by bearing and has, and sets on longitudinal rod
It is equipped with external screw thread, is adapted to connection with the band internal thread casing being set in outside it, described sleeve pipe is fixed on one end of transverse bar,
And the movement of described sleeve pipe in the horizontal direction is driven by transverse bar.
In above scheme preferably, the transverse bar passes through the through-hole being arranged on bracket, and the bracket is used to support institute
State test specimen initial crack reproducing unit.
In above scheme preferably, the through-hole is provided with internal screw thread, and the transverse bar is provided with external screw thread, the cross
It is connect to bar with described sleeve pipe bearing.
Another aspect of the present invention provides a kind of test specimen initial crack clone method, multiple using above-mentioned test specimen initial crack
Device processed carries out initial crack duplication, comprising the following steps:
S1, the top that the test specimen initial crack reproducing unit is placed in the test specimen with initial crack, make the disk
The bottom end of cutting tool is placed in the starting point of the initial crack, then makes the mechanical shoulder cut-off knife tool along the streakline of the crackle
Horizontal movement, meanwhile, adjusting longitudinal rod makes the mechanical shoulder cut-off knife tool contact of a curve with the line depths of crackle always, record cross
To the reading of bar and longitudinal rod, to obtain the transverse direction and longitudinal direction size of initial crack；
S2, the test specimen initial crack reproducing unit is placed in crackle to be copied test specimen top, and by described initial
The transverse direction and longitudinal direction movement of the tool of mechanical shoulder cut-off knife described in the transverse direction and longitudinal direction size Control of crackle, while starting mechanical shoulder cut-off knife tool
Rotation control motor, cut mechanical shoulder cut-off knife tool to test specimen.
The present invention has the advantages that
Device is easy to operate, can quickly replicate to crackle；
The level and longitudinal movement for adjusting mechanical shoulder cut-off knife tool can be completed by control mechanism, it is only necessary to will initially be split
The function of the laterally and longitudinally size relationship of line is placed in control mechanism, portable good, the crackle high reliablity of duplication.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram of a preferred embodiment of test specimen initial crack reproducing unit of the present invention.
Fig. 2 is the apparatus structure schematic diagram of another preferred embodiment of test specimen initial crack reproducing unit of the present invention.
Wherein, 1 is test specimen, and 2 be transverse bar, and 3 be longitudinal rod, and 4 be sliding block, and 5 have for mechanical shoulder cut-off knife, and 6 be bracket.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.Under
Face is described in detail the embodiment of the present invention in conjunction with attached drawing.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as protecting the present invention
The limitation of range.
Present invention firstly provides a kind of test specimen initial crack reproducing units, for precrack and are copied to other
On testpieces, the test specimen initial crack reproducing unit includes:
Mechanical shoulder cut-off knife tool 5, is used for circumgyration incision test specimen；
Regulating mechanism, including transverse bar 2 and longitudinal rod 3 are respectively used to adjust the mechanical shoulder cut-off knife tool 5 lateral and vertical
Movement on direction is provided with scale on the transverse bar 2 and longitudinal rod 3；
Bindiny mechanism, for mechanical shoulder cut-off knife tool to be rotatably connected on the adjustment structure.
Embodiment 1,
As shown in Figure 1, given in the schematic diagram under the two states of test specimen initial crack reproducing unit with test specimen 1
Positional diagram.
In the present embodiment, test specimen initial crack reproducing unit mainly includes transverse bar 2, longitudinal rod 3, sliding block 4 and disk
Cutting tool 5.Wherein, 2 level of transverse bar is placed in the surface for needing to replicate cracks of test specimen 1, fixed, longitudinal
Bar 3 is vertical with transverse bar 2 always, and longitudinal rod 3 drive mechanical shoulder cut-off knife tool 5 transversely bar 2 graduation mark movement.
It should be noted that even if when mechanical shoulder cut-off knife tool 5 is in 3 side-to-side movement of rotation status or longitudinal rod, it is longitudinal
Bar 3 remains vertical state, for this purpose, the present embodiment solves the connection between longitudinal rod and transverse bar by sliding block 4, and passes through
Bindiny mechanism solves the connection of longitudinal rod and mechanical shoulder cut-off knife tool 5, specific as follows:
(1) connection of transverse bar 2 and longitudinal rod 3
It is provided with sliding rail on the transverse bar 2 and longitudinal rod 3, one end of sliding block 4 is placed in the sliding rail of transverse bar 2, separately
One end is placed in the sliding rail of longitudinal rod 2, and sliding rail is engaged with 4 gear of sliding block.
It is understood that the sliding rail inner wall of transverse bar 2 and longitudinal rod 3 can be with sliding block 4 and be smoothly connected, it can also
To be that gear engages, sliding block 4 is i-shaped beams structure, and upper and lower siding is located in two sliding rails, in the present embodiment, by
It is fixed in transverse bar, therefore the transverse movement in the sliding rail of transverse bar 2 of sliding block 4 can be pushed, and sliding block 4 is in longitudinal rod 3
It is confined in interior transverse direction, therefore longitudinal rod can be pushed to make its transversely bar scale direction movement；Similarly, vertical
To on direction, original sliding block 4 is can to move in the sliding rail of longitudinal rod 3, however due to the fixed transverse bar 2 of sliding block 4
The freedom of motion of longitudinal direction is limited, so when the relative motion in longitudinal rod 3 of sliding block 4, actually about 3 longitudinal rod
Movement.Above-mentioned connection type ensure that longitudinal rod can horizontal movement and vertical movement.
It should be noted that sliding block 4 is traditionally arranged to be gear, together to enable the movement of sliding block 4 preferably to be controlled
Reason, transverse bar and longitudinal rod inner wall are provided with rack gear, by way of engagement, ensure that longitudinal rod in the vertical and horizontal directions
Movement have adjustability, stability.It is understood that when 4 both ends of sliding block are set as gear, with the aforementioned work
The web of the sliding block of word girder construction can be set to bearing connection, i.e., the described web is arranged to cylindrical structure, the both ends point of cylinder
It does not cover on the inner ring of two bearings, and the outer ring of bearing is then arranged to match the gear of rack gear.
Further, the present embodiment is also provided with control mechanism, the bearing rotation at sliding block both ends can be controlled, to make
The level of longitudinal rod is controllable with the movement of vertical direction.
(2) connection of longitudinal rod 3 and mechanical shoulder cut-off knife tool 5
Foregoing description has been realized in the level and the movement of vertical direction of longitudinal rod 3, and wherein purpose of the invention it
One be to have by mechanical shoulder cut-off knife it is 5 prefabricated to carry out crackle, as long as therefore mechanical shoulder cut-off knife tool 5 is arranged on longitudinal rod 3,
And can rotate cutting when not influence longitudinal rod and with longitudinal rod movement and move.For this purpose, in the present embodiment,
It is socketed a bearing part in the rotation axis of mechanical shoulder cut-off knife tool 5, is then fixed to the outer ring of the bearing part on longitudinal rod 3 i.e.
Can, specifically, the axis of the longitudinal rod 3 has 5 diameter with the mechanical shoulder cut-off knife in parallel, and set on the longitudinal rod 3
It is equipped with groove, the bindiny mechanism includes the bearing part for being built in the groove, and the inner ring of the bearing part connects the disk
The rotation axis of cutting tool 5, outer ring are fixed on the inner wall of the groove.
It is understood that mechanical shoulder cut-off knife tool 5 is the cutting tool with gear shape, trying it by high-speed rotation
Crackle is manufactured on part, rotation axis passes through motor control.
Embodiment 2,
It is similar to Example 1, except that:
With reference to Fig. 2, in the present embodiment, test specimen initial crack reproducing unit mainly includes transverse bar 2, longitudinal rod 3 and circle
Disk cutting tool 5, wherein the end of transverse bar 2 is provided with casing, and transverse bar 2 can be vertical with side-to-side movement, casing axis
, longitudinal rod 3 can move up and down in casing, and the bottom end of longitudinal rod 3 is connected with mechanical shoulder cut-off knife tool 5, so as to guarantee
Movement of the mechanical shoulder cut-off knife tool 5 on laterally and longitudinally direction.
Specifically, one end of the longitudinal rod 3 connects the mechanical shoulder cut-off knife tool 5 by bearing, bearing and implementation herein
Example 1 is similar, it is only necessary to bearing outer ring is fixed to the end of longitudinal rod 3, inner ring is set in the rotation axis of mechanical shoulder cut-off knife tool 5
?.
To overcome gravity to influence, the movement of the vertical direction of longitudinal rod 3 needs to control, for this purpose, in the present embodiment, longitudinal rod
It is provided with external screw thread on 3, connection is adapted to the band internal thread casing being set in outside it, therefore work as in casing vertical direction not
When dynamic, the movement in its vertical direction can be realized by rotating longitudinal rod 3, it is to be understood that guarantee longitudinal rod 3 certainly
When body rotates, the end connecting with mechanical shoulder cut-off knife tool 5 will not influence the rotation of mechanical shoulder cut-off knife tool 5, the end of longitudinal rod 3
Portion is traditionally arranged to be two bearings or similarity piece, and one is the bearing of the rotation axis of the clutch disk cutting tool 5 of foregoing description
Part, another structure are the structural member that guarantees the end and will not rotate with 3 own rotation of longitudinal rod, and structure can also be simple at this
It is set as two inside and outside lantern rings that can be rotatablely connected, inside and outside lantern ring smooth contact.
With reference to Fig. 2, described sleeve pipe is fixed on one end of transverse bar 2, and drives described sleeve pipe in the horizontal direction by transverse bar 2
On movement.The transverse bar 2 passes through the through-hole being arranged on bracket 6, and it is multiple that the bracket 6 is used to support the test specimen initial crack
Device processed.It is understood that the present embodiment difference from example 1 is that, the present embodiment bracket 6 is fixed, transverse bar
Movement, and transverse bar is different in embodiment 1, no bracket 6.
In the present embodiment, internal screw thread has also been can be set in the through-hole on the bracket 6, and the transverse bar 2 is provided with outer spiral shell
Line, the transverse bar 2 are connect with described sleeve pipe bearing, i.e., move it in the horizontal direction by rotation transverse bar 2, simultaneously
Will not influence casing because of its own rotation again vertically puts form.
In the present embodiment, transverse bar is completed with longitudinal rod own rotation by control mechanism.
In embodiment 1 and embodiment 2, control mechanism built-in can control program, and the control program includes at least disk
Function of the cutting tool 5 relative to the positional relationship of transverse bar and longitudinal rod.
The function can be following form, when mechanical shoulder cut-off knife tool 5 is located at the position of a certain scale value of transverse bar 2
When, mechanical shoulder cut-off knife tool 5 needs the position of the correspondence scale value positioned at longitudinal rod 3.
For this purpose, being tried the present invention also provides a kind of test specimen initial crack clone method using described in above-described embodiment
Part initial crack reproducing unit carries out initial crack duplication, includes the following steps:
S1, the top that the test specimen initial crack reproducing unit is placed in the test specimen with initial crack, make the disk
The bottom end of cutting tool 5 is placed in the starting point of the initial crack, then makes the mechanical shoulder cut-off knife tool 5 along the line of the crackle
Line horizontal movement, meanwhile, adjusting longitudinal rod 3 makes the mechanical shoulder cut-off knife tool 5 contact of a curve with the line depths of crackle always, note
The reading for recording transverse bar 2 and longitudinal rod 3, to obtain the transverse direction and longitudinal direction size of initial crack；
S2, the test specimen initial crack reproducing unit is placed in crackle to be copied test specimen top, and by described initial
The transverse direction and longitudinal direction movement of the tool of mechanical shoulder cut-off knife described in the transverse direction and longitudinal direction size Control of crackle 5, while starting mechanical shoulder cut-off knife
The rotation of tool 5 controls motor, so that the mechanical shoulder cut-off knife is had 5 pairs of test specimens and cuts.
It is illustrated by taking the test specimen initial crack reproducing unit of embodiment as an example.
Before carrying out initial crack duplication, it is necessary first to flaw size is recorded, including any on crackle bottom curve
The transverse and longitudinal coordinate of a bit.
When carrying out crackle duplication, with reference to Fig. 1, the transverse bar 2 of test specimen initial crack reproducing unit is placed in test first
On part 1, the mechanical shoulder cut-off knife tool 5 is adjusted, it is tangent with starting point on the left of crackle to make it, at this point, be reference point with sliding block 4, it is horizontal
It is consistent with the starting spot size of the initial crack of record to bar 2 and the scale value on longitudinal rod 3；
Control sliding block 4 makes it that longitudinal axis 3 be driven to move right certain distance, which is generally mechanical shoulder cut-off knife tool 5
Corresponding longitudinal rod scale is checked according to the scale of the transverse bar 2 after movement at this time, according to longitudinal rod in the 1/10~1/5 of radius
Scale, control sliding block 4 drives longitudinal axis to move downward, cuts slight crack, until longitudinal rod is moved down into designated position, Zhi Hou
It is restored in vertical direction, continues the 1/10~1/5 of radius for making mechanical shoulder cut-off knife tool 5 move right mechanical shoulder cut-off knife tool 5, then control
Rounding disk cutting tool 5 moves downward, repeatedly, until mechanical shoulder cut-off knife tool 5 is moved right to end point.
It should be noted that in the motion process of mechanical shoulder cut-off knife tool 5, circumgyration incision test specimen always.
In the present embodiment, when the diameter of mechanical shoulder cut-off knife tool 5 is far longer than the most deep size of crackle, disk can control
Cutting tool 5 moves simultaneously on lateral shaft and longitudinal axis direction, first makes in its transverse direction without as described above
It is moved to designated position, then is carried out longitudinally cutting.
In the present embodiment, the program for controlling slide block movement contains at least one movement function, with the transverse bar of initial crack
Coordinate system, fitting function are established with longitudinal rod having a size of the longitudinal axis having a size of horizontal axis, so that control structure be made to directly read the letter
Number, and by the sliding of function control sliding block.At this time, it is only necessary to by test specimen initial crack reproducing unit when being installed on new test specimen
Size and initial test specimen on to install the size of the device corresponding consistent.
For the structure of embodiment 2, control method is consistent with foregoing description, it is only necessary to be arranged to control mechanism
The rotation of transverse bar and longitudinal rod is controlled, if controlled certainly by computer program, it is also necessary to consider bar
Rotation and bar linear motion relationship.
Finally it is noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, the essence for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Mind and range.
Claims (5)
1. a kind of test specimen initial crack clone method carries out initial crack duplication using test specimen initial crack reproducing unit, is used for
Precrack is simultaneously copied on other testpieces, and the test specimen initial crack reproducing unit includes:
Mechanical shoulder cut-off knife has (5), is used for circumgyration incision test specimen；
Regulating mechanism, including transverse bar (2) and longitudinal rod (3), be respectively used to adjust the mechanical shoulder cut-off knife tool (5) laterally and
Movement on longitudinal direction is provided with scale on the transverse bar (2) and longitudinal rod (3)；
Bindiny mechanism, for mechanical shoulder cut-off knife tool to be rotatably connected on the adjustment structure；
It is provided with sliding rail on the transverse bar (2) and longitudinal rod (3), one end of sliding block (4) is placed in the sliding rail of transverse bar (2)
Interior, the other end is placed in the sliding rail of longitudinal rod (2), and sliding rail is engaged with sliding block (4) gear, and the transverse bar (2) is horizontally placed at institute
It states above test specimen, the longitudinal rod (3) connects the mechanical shoulder cut-off knife tool (5) by bindiny mechanism, and can be in the disk
When cutting tool (5) rotates, longitudinal rod (3) are kept to be in plumbness, which is characterized in that test specimen initial crack duplication side
Method includes:
S1, the top that the test specimen initial crack reproducing unit is placed in the test specimen with initial crack cut the disk
The bottom end of cutter (5) is placed in the starting point of the initial crack, then makes the mechanical shoulder cut-off knife tool (5) along the line of the crackle
Line horizontal movement, meanwhile, adjusting longitudinal rod (3) makes the mechanical shoulder cut-off knife tool (5) the curve phase with the line depths of crackle always
It cuts, the reading of transverse bar (2) and longitudinal rod (3) is recorded, to obtain the transverse direction and longitudinal direction size of initial crack；
S2, the test specimen initial crack reproducing unit is placed in crackle to be copied test specimen top, and press the initial crack
Transverse direction and longitudinal direction size Control described in mechanical shoulder cut-off knife tool (5) transverse direction and longitudinal direction movement, while start mechanical shoulder cut-off knife tool
(5) rotation controls motor, cuts the mechanical shoulder cut-off knife tool (5) to test specimen.
2. test specimen initial crack clone method as described in claim 1, it is characterised in that: the axis of the longitudinal rod (3) is flat
The capable diameter with mechanical shoulder cut-off knife tool (5), and it is arranged on the longitudinal rod (3) fluted, the bindiny mechanism includes
It is built in the bearing part of the groove, the inner ring of the bearing part connects the rotation axis of the mechanical shoulder cut-off knife tool (5).
3. test specimen initial crack clone method as described in claim 1, it is characterised in that: one end of the longitudinal rod (3) is logical
It crosses bearing and connects mechanical shoulder cut-off knife tool (5), and be provided with external screw thread on longitudinal rod (3), and be set in having outside it
The casing of internal screw thread is adapted to connection, and described sleeve pipe is fixed on one end of transverse bar (2), and drives described sleeve pipe by transverse bar (2)
Movement in the horizontal direction.
4. test specimen initial crack clone method as claimed in claim 3, it is characterised in that: the transverse bar (2) passes through bracket
(6) through-hole being arranged on, the bracket (6) are used to support the test specimen initial crack reproducing unit.
5. test specimen initial crack clone method as claimed in claim 4, it is characterised in that: the through-hole is provided with internal screw thread,
The transverse bar (2) is provided with external screw thread, and the transverse bar (2) connect with described sleeve pipe bearing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610766354.6A CN106370490B (en) | 2016-08-29 | 2016-08-29 | A kind of test specimen initial crack reproducing unit and method |
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| CN201610766354.6A CN106370490B (en) | 2016-08-29 | 2016-08-29 | A kind of test specimen initial crack reproducing unit and method |
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| CN106370490B true CN106370490B (en) | 2019-08-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102006013609B4 (en) * | 2006-03-22 | 2014-03-27 | Karl Eugen Fischer Gmbh | Cutting device and method for cutting strip material, in particular textile or steel cord strips |
| CN101140206B (en) * | 2007-10-12 | 2010-09-15 | 浙江工业大学 | Connecting mechanism used for T type cuniform spread out load application sample prefabricated endurance crack |
| CN101561459A (en) * | 2009-06-04 | 2009-10-21 | 中国航空工业集团公司西安飞机设计研究所 | Damage-tolerance testing method for lower wall panel of airplane outboard wing |
| CN203606240U (en) * | 2013-06-28 | 2014-05-21 | 西安科技大学 | Assembled type shearing instrument |
| CN204772736U (en) * | 2015-06-03 | 2015-11-18 | 山西省交通科学研究院 | Bituminous mixture's test piece cutting device |
| CN104897353A (en) * | 2015-06-23 | 2015-09-09 | 中国航空工业集团公司西安飞机设计研究所 | Member damage detection method |
| CN105345937B (en) * | 2015-11-23 | 2017-06-30 | 河南理工大学 | Prepare the experimental provision and its operating method in Brazilian disc herringbone crack |
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