CN103170679B - A kind of process equipment of the chevron shaped breach of DWTT sample - Google Patents
A kind of process equipment of the chevron shaped breach of DWTT sample Download PDFInfo
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- CN103170679B CN103170679B CN201110440295.0A CN201110440295A CN103170679B CN 103170679 B CN103170679 B CN 103170679B CN 201110440295 A CN201110440295 A CN 201110440295A CN 103170679 B CN103170679 B CN 103170679B
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- saw blade
- sample
- chevron shaped
- dwtt
- process equipment
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Abstract
A kind of process equipment of the chevron shaped breach of DWTT sample, including clamping portion, work portion and control system, described work portion includes sawing beam, saw beam guide rail and saw blade, described saw beam guide rail is fixedly installed relative to the described portion of clamping, described saw beam is arranged at described saw beam slide on rails, and described saw blade is arranged on described saw beam；The described portion that clamps is oppositely arranged with described saw blade, and described control system includes that saw blade traveling control system, described saw blade traveling control system are connected with the dynamical system of described saw blade.This invention ensures that the machining accuracy of sample break, due to saw blade automatic decision zero displacement point during traveling control of the present invention, therefore without considering further that the developed width of sample；Simple to operate, improve work efficiency；Reduce labor intensity.
Description
Technical field
The invention belongs to machinery manufacturing technology field, relate to a kind of pipe line steel DWTT sample chevron shaped breach process equipment.
Background technology
Along with the development of world oil gas industry, the construction of long-distance transport pipes is just defeated towards major diameter, big wall thickness, high pressure
The direction sent is developed, and this just requires that pipe line steel has high intensity and high tenacity.DWTT (DWTT) is a kind of for commenting
Determine brittle fracture and the important method of ductile fracture performance, for obtaining the crack arrest characteristic pipe line steel with good ductility fracture, it is provided that
Important inspection and test basis.The most conventional pipe line steel DWTT test standard has API RP 5L3-1996 (THIRD
EDITION), Recommended Practice for Conducting Drop-Weight Tear Test on Line Pipe,
GB/T8363-2007 (ferritic steel tubes DWTT method) and SYT 6476-2007 (conveying steel pipe DWTT
Method), specify according to each standard, sample break form includes press type and chevron shaped breach, and press type breach uses has regulation
The speciality steel push type broach of blade angle suppresses, and chevron shaped breach uses the mode of line cutting or sawing to obtain.
The problem that current pipeline steel DWTT common test method and sample processing mode exist:
In prior art, each pipe enterprise the most all uses press type breach to carry out DWTT test, is on the one hand due to pipe before this
Line steel general grade of steel toughness is relatively low, wall thickness is relatively thin, and it is disconnected that processing press type breach is entirely capable of hammer under the drop weight test of 50000J energy
Sample；On the other hand, press type breach is easy to process, and the breach of chevron shaped notched specimen is processed by current domestic pipe enterprise,
Generally using the mode of artificial handsaw to carry out, the method labor intensity is big, work efficiency low and breach machining accuracy is poor.But with
The raising of pipeline steel strength and toughness, and the continuous increase of wall thickness, DWTT is to testing equipment and test level
Require more and more higher.The Drop Weight Tear Tester design maximum ability of current domestic pipe line steel is 50000J, the highest energy
Disconnected most of samples can be hammered into shape, but the submerged pipeline DWTT for some high-strength and high ductility heavy walls tests, or existing problems.Such as,
Certain submerged pipeline Project design pressure the most domestic is up to 23.9MPa, for high-pressure natural gas conveyance conduit rare in world wide,
The design wall thickness of sea pipe is up to 31.8mm, and grade of steel reaches X70, in the project implementation process, uses press type breach at ceiling capacity
During for testing on the testing machine of 50000J, following situation occurred:
1) when using press type breach total wall thickness sample to test, due to the high-intensity high-tenacity of material, often occurring cannot
The phenomenon of the disconnected sample of hammer.
2) according to standard-required, thinning sample can be used and reduce the method that temperature compensates and test, but due to by material
Material inhomogeneities, ductile-brittle transition temperature, Percentage of Shear Fracture For Fracture Surface evaluation method and the impact of thinning sample processing method, the method
Can not the actual performance of reaction material completely.
3) when the limit capacity using testing machine is tested, hammer sword and the phenomenon of two bearing damages of this equipment often occurs.
Therefore, for the pipe line steel that toughness is higher, ordinary priority selects chevron shaped breach (Cheveron Notch) sample to carry out
Test, chevron shaped nicked form is as it is shown in figure 1, this breach can eliminate at the beginning of relevant too much of the pipe line steel higher with some toughness
Beginning energy.Such as, for " grade of steel used by West-east Gas engineering is X70, wall thickness be 14.6mm pipe line steel from the point of view of, its summer
Charpy merit measured value is generally 260～460 joules, use chevron shaped breach carry out DWTT required for hammer break energy
Than use pressed notch carry out DWTT required for hammer break energy reduce 3000～4000 joules.For 25.4mm wall
Thick above material, does not has data to illustrate in standard, but inhales about the impact of Charpy v-notch standard size impact specimen from each standard
From the point of view of receiving the near-sighted graph of a relation that merit absorbs energy with pressed notch, chevron shaped breach DWTT, its capacity volume variance can be bigger.Therefore,
Chevron shaped breach is used not only to decrease the processing hardening that v-notch occurs in pressing process, the reduction of energy and required hammer breaks
The service life of equipment can be improved.
Therefore, the hammer needed for using press type breach based on Hi-grade steel thick-wall pipeline steel DWTT sample of the prior art has broken energy
Exceed domestic tubulation industry maximum drop hammer tester design energy, and pipe enterprise uses manual mode to process chevron shaped breach mostly
Situation, be badly in need of inventing a kind of chevron shaped breach process equipment, with the utilization rate of guarantee test equipment, reduce labor intensity and carry
High labor efficiency.
Summary of the invention
It is an object of the invention to design the process equipment of a kind of novel chevron shaped breach of DWTT sample, solve the problems referred to above.
To achieve these goals, the technical solution used in the present invention is as follows:
The process equipment of a kind of chevron shaped breach of DWTT sample, including clamping portion, work portion and control system, described work portion wraps
Including saw beam, saw beam guide rail and saw blade, described saw beam guide rail is fixedly installed relative to the described portion of clamping, and described saw beam is at described saw beam
Slide on rails is arranged, and described saw blade is arranged on described saw beam；The described portion that clamps is oppositely arranged with described saw blade, described control
System includes that saw blade traveling control system, described saw blade traveling control system are connected with the dynamical system of described saw blade.
The described portion of clamping includes fixture and sample fixation screw silk, and described fixture includes sample fixing, the groove of described sample fixing
Wall is provided with sample fixation screw hole, and described sample fixation screw silk matches with described sample fixation screw hole.
The described portion of clamping also includes that base and latch, described base are provided with vertical rotary hole, and described fixture is arranged on described base
Upper surface on, the bottom of described fixture is fixed with vertical rotary post, described vertical rotary post inserts described vertical rotary hole,
Being equipped with pin hole on the correspondence position in described vertical rotary post and described vertical rotary hole, described latch matches with described pin hole
Close.
Described pin hole on described vertical rotary hole runs through described base.
Described pin hole is square opening, and described latch is square latch.
Described sample fixation screw silk and described sample fixation screw hole are at least provided with two groups.
Described sample fixation screw silk and described sample fixation screw hole are provided with two groups, and are respectively positioned on described sample fixing the same side
Cell wall on.
Described saw blade traveling control system includes that saw blade flexural deformation detection device is defeated with the simulation that saw overall process cut by the described saw blade of monitoring
Entering output module, described saw blade flexural deformation detection device is connected with described simulation input/output module.
Described simulation input/output module includes feedback module, and described feedback module is for detecting device by described saw blade flexural deformation
When the described saw blade detected starts to produce flexural deformation because of painstaking, the progress point at described saw blade place is set to the row of described saw blade
Enter zero displacement point.
Described simulation input/output module also includes threshold module, and described threshold module is at described saw blade flexural deformation detection dress
Put the described saw blade that detects when producing, because of painstaking, the threshold values that flexural deformation reaches described set-up of control system, reduce described saw blade
Gait of march or close the traveling of described saw blade.
Beneficial effects of the present invention can be summarized as follows:
1, the working depth of the breach of the present invention can realize automatically controlling after program setting and cutting speed from
Regulatory function, it is ensured that the machining accuracy of sample break；
2, specifying according to standard, the precision of specimen width is that (each standard is to sample precision for 76.2 ± 3mm or 76.2 ± 1.5mm
Requirement be slightly different), the width maximum difference of the most qualified sample is up to 6mm, but owing to the saw blade of the present invention exists
Automatic decision zero displacement point during traveling control, therefore without considering further that the developed width of sample；
3, the present invention only needs to set one parameter of wall thickness for the processor of same specification (thickness) sample, simple to operate；
4, the sample of the present invention only needs once to clamp, after the breach cutting saw sample, after rotating 180 ° of sample,
Directly at the same position machining gap of sample opposite side, it is not necessary to centering again, improve work efficiency；
5, without too many manual operation in the sample course of processing of the present invention, reduce labor intensity, improve work effect
Rate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of chevron shaped nicked form in prior art；
Fig. 2 is the structural representation that the master of present clip regards；
Fig. 3 is the structural representation of the side-looking of present clip；
Fig. 4 is the structural representation of side-looking of the present invention；
Fig. 5 is to install the main structural representation regarded in portion in the present invention additional.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with accompanying drawing and
Embodiment, is further elaborated to the present invention.Should be appreciated that specific embodiment described herein is only in order to explain
The present invention, is not intended to limit the present invention.
The process equipment of a kind of chevron shaped breach of DWTT sample as shown in Figures 2 to 5, including clamping portion, work portion and control
System, described work portion includes sawing beam 7, saw beam guide rail 12 and saw blade 8, and described saw beam guide rail 12 is solid relative to the described portion of clamping
Fixed arranging, described saw beam 7 slides setting on described saw beam guide rail 12, and described saw blade 8 is arranged on described saw beam 7；Described
The portion that clamps is oppositely arranged with described saw blade 8, and described control system includes saw blade traveling control system 11, and described saw blade is advanced and controlled
System 11 is connected with the dynamical system of described saw blade 8；
The described portion of clamping includes that fixture 3, sample fixation screw silk 5, base 1 and latch, described fixture 3 include sample fixing 6,
The cell wall of described sample fixing 6 is provided with sample fixation screw hole, described sample fixation screw silk 5 and described sample fixation screw hole phase
Coordinating, described sample fixation screw silk 5 and described sample fixation screw hole are provided with two groups and are respectively positioned on described sample fixing 6 together
On the cell wall of side；Described base 1 is provided with vertical rotary hole 9, and described fixture 3 is arranged on the upper surface of described base 1,
Being fixed with vertical rotary post 10 on the bottom of described fixture 3, described vertical rotary post 10 inserts described vertical rotary hole 9, described
Pin hole 4, the institute on described vertical rotary hole 9 it is equipped with on the correspondence position in vertical rotary post 10 and described vertical rotary hole 9
Stating pin hole 4 and run through described base 1, described latch matches with described pin hole 4, and described pin hole 4 is square opening, institute
Stating latch is square latch；
Described saw blade traveling control system 11 includes that the mould of saw overall process cut by saw blade flexural deformation detection device and the described saw blade 8 of monitoring
Intending input/output module, described saw blade flexural deformation detection device is connected with described simulation input/output module, described simulation input
Output module includes feedback module, and described feedback module is for the described saw blade described saw blade flexural deformation detection arrived
The progress point at 8 described saw blade 8 places when starting to produce flexural deformation because of painstaking is set to the traveling zero displacement point of described saw blade 8；
Described simulation input/output module also includes threshold module, and described threshold module is for visiting at described saw blade flexural deformation detection device
When the described saw blade 8 measured produces, because of painstaking, the threshold values that flexural deformation reaches described set-up of control system, reduce described saw blade 8
Gait of march or close the traveling of described saw blade 8.
Base 1 and fixture 3 structure as in figure 2 it is shown, equipment overall diagram as shown in Figure 3.
Whole fixture 3 width is 310mm, (standard-required sample width as the sample maximum deviation width qualified with processing dimension
Degree is 305 ± 5mm)；Saw blade 8 thickness is less than 1mm, is 45 ° with vertical direction, it is ensured that the width of machining gap and angle
Meet the requirements；Being the sample of t for wall thickness, the Bottom Runby of saw blade 8 is: 0.5t+5mm, and the motion mode of saw blade 8 uses
One direction is moved continuously, it is ensured that breach surface quality.After the breach completion of processing of sample 2 side, extract from pin hole 4
Latch, along Plane Rotation fixture 3180 °, reinserts latch and fixes fixture 3, start to process another side breach.
The simulation input/output module of saw blade traveling control system 11, is monitored the overall process cutting saw: sawing machine increases saw blade
The feedbacks of 8 deformation, set breach working depth in the controls as 0.5t+5mm, are occurring saw blade 8 for the first time because of painstakingly
When producing diastrophic feedback, system automatic decision saw blade 8 has contacted sample 2, sets and advances displacement for saw blade 8 herein
Zero point, during until saw blade 8 descending displacement reaches 0.5t+5mm, it is judged that sample 2 side breach is machined complete, and saw blade 8 is automatic
Exit；Meanwhile, during processing, the valve thresholding of setup control saw blade 8 bending, in whole cutting process, by right
The continuous feedback of saw blade 8 deflection, when saw blade 8 bends to the valve thresholding of system, system reduces speed or closes feeding,
Thus realize the self-adaptative adjustment cutting saw speed, it is ensured that breach surface quality.
The specific implementation process of pipe line steel DWTT sample chevron shaped breach process equipment is as follows:
1) being positioned in fixture 3 by the sample 2 treating gap, the specimen width of standard-required is 305 ± 5mm, fixture 3
Width design is 310mm, therefore by the distance at the two ends of range estimation fixture 3 with sample 2 two ends, Ke Yi great placing when
Cause to judge whether sample 2 aligns, then tighten two fixed screws；
2) being inserted through by Fixed latches in the square opening of fixture 3 swingle and base 1, stationary fixture 3 can not rotate；
3) in the control program that saw blade 8 is advanced, input t value, start program, start the breach of processing sample 2 side；
4), after the breach completion of processing of sample 2 side, Fixed latches is extracted, after rotary clamp 3 reaches 180 °, then will be solid
Determine latch and insert in square opening, start program, until the breach completion of processing of sample 2 opposite side, sample 2 can be taken off.
Describe in detail the present invention above by concrete with preferred embodiment, but it will be understood by those skilled in the art that this
Invention is not limited to embodiment described above, all within the spirit and principles in the present invention, any amendment, the equivalent made are replaced
Change, should be included within the scope of the present invention.
Claims (9)
1. the process equipment of the chevron shaped breach of DWTT sample, it is characterised in that: include the portion that clamps, work portion and control system,
Described work portion includes sawing beam, saw beam guide rail and saw blade, and described saw beam guide rail is fixedly installed relative to the described portion of clamping, described saw
Beam is arranged at described saw beam slide on rails, and described saw blade is arranged on described saw beam；Described clamp that portion is relative with described saw blade to be set
Putting, described control system includes that saw blade traveling control system, described saw blade traveling control system connect with the dynamical system of described saw blade
Connect；
The described portion of clamping includes that fixture, base and latch, described base are provided with vertical rotary hole, and described fixture is arranged on described
On the upper surface of base, the bottom of described fixture being fixed with vertical rotary post, described vertical rotary post inserts described vertical rotary
Hole, the correspondence position in described vertical rotary post and described vertical rotary hole is equipped with pin hole, described latch and described pin hole
Match.
The process equipment of the chevron shaped breach of DWTT sample the most according to claim 1, it is characterised in that clamp portion described in:
Including sample fixation screw silk, described fixture includes that sample fixing, the cell wall of described sample fixing are provided with sample fixation screw hole,
Described sample fixation screw silk matches with described sample fixation screw hole.
The process equipment of the chevron shaped breach of DWTT sample the most according to claim 1, it is characterised in that: described vertical rotation
The described pin hole turned on hole runs through described base.
The process equipment of the chevron shaped breach of DWTT sample the most according to claim 1, it is characterised in that: described pin hole
For square opening, described latch is square latch.
The process equipment of the chevron shaped breach of DWTT sample the most according to claim 2, it is characterised in that: described sample is solid
Determine screw and described sample fixation screw hole at least provided with two groups.
The process equipment of the chevron shaped breach of DWTT sample the most according to claim 5, it is characterised in that: described sample is solid
Determine screw and described sample fixation screw hole is provided with two groups, and be respectively positioned on the cell wall of described sample fixing the same side.
7. according to the process equipment of claim 1 to 6 one of the arbitrarily described chevron shaped breach of DWTT sample, it is characterised in that:
Described saw blade traveling control system includes that the simulation that saw overall process cut by saw blade flexural deformation detection device and the described saw blade of monitoring inputs defeated
Going out module, described saw blade flexural deformation detection device is connected with described simulation input/output module.
The process equipment of the chevron shaped breach of DWTT sample the most according to claim 7, it is characterised in that: described simulation is defeated
Entering output module and include feedback module, described feedback module is for the described saw described saw blade flexural deformation detection arrived
When bar starts to produce flexural deformation because of painstaking, the progress point at described saw blade place is set to the traveling zero displacement point of described saw blade.
The process equipment of the chevron shaped breach of DWTT sample the most according to claim 8, it is characterised in that: described simulation input
Output module also includes threshold module, and described threshold module is for the described saw arrived in described saw blade flexural deformation detection
When bar produces, because of painstaking, the threshold values that flexural deformation reaches described set-up of control system, reduce gait of march or the closedown of described saw blade
The traveling of described saw blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110440295.0A CN103170679B (en) | 2011-12-23 | 2011-12-23 | A kind of process equipment of the chevron shaped breach of DWTT sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110440295.0A CN103170679B (en) | 2011-12-23 | 2011-12-23 | A kind of process equipment of the chevron shaped breach of DWTT sample |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103170679A CN103170679A (en) | 2013-06-26 |
| CN103170679B true CN103170679B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110440295.0A Expired - Fee Related CN103170679B (en) | 2011-12-23 | 2011-12-23 | A kind of process equipment of the chevron shaped breach of DWTT sample |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105092335B (en) * | 2015-08-26 | 2017-12-01 | 中国石油天然气集团公司 | A kind of sample for avoiding DWTT abnormal fractures and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3825152A1 (en) * | 1988-07-23 | 1990-01-25 | Festo Kg | Method of cutting tubes to length as well as an apparatus for carrying out the method |
| CN201645535U (en) * | 2010-03-26 | 2010-11-24 | 唐山市致富塑料机械有限公司 | Tube cutting machine |
| CN201760670U (en) * | 2010-09-14 | 2011-03-16 | 李德昌 | Automatic tube cutting machine |
| CN201997799U (en) * | 2011-02-23 | 2011-10-05 | 浙江天兴管业有限公司 | Angle-adjustable pipe cutting machine |
| CN202411542U (en) * | 2011-12-23 | 2012-09-05 | 北京隆盛泰科石油管科技有限公司 | Machining equipment for herringbone notches of DWTT (drop-weight tear test) samples |
-
2011
- 2011-12-23 CN CN201110440295.0A patent/CN103170679B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3825152A1 (en) * | 1988-07-23 | 1990-01-25 | Festo Kg | Method of cutting tubes to length as well as an apparatus for carrying out the method |
| CN201645535U (en) * | 2010-03-26 | 2010-11-24 | 唐山市致富塑料机械有限公司 | Tube cutting machine |
| CN201760670U (en) * | 2010-09-14 | 2011-03-16 | 李德昌 | Automatic tube cutting machine |
| CN201997799U (en) * | 2011-02-23 | 2011-10-05 | 浙江天兴管业有限公司 | Angle-adjustable pipe cutting machine |
| CN202411542U (en) * | 2011-12-23 | 2012-09-05 | 北京隆盛泰科石油管科技有限公司 | Machining equipment for herringbone notches of DWTT (drop-weight tear test) samples |
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| CN103170679A (en) | 2013-06-26 |
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