CN103170679A - DWTT sample herringbone notch machining equipment - Google Patents
DWTT sample herringbone notch machining equipment Download PDFInfo
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- CN103170679A CN103170679A CN2011104402950A CN201110440295A CN103170679A CN 103170679 A CN103170679 A CN 103170679A CN 2011104402950 A CN2011104402950 A CN 2011104402950A CN 201110440295 A CN201110440295 A CN 201110440295A CN 103170679 A CN103170679 A CN 103170679A
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Abstract
DWTT sample herringbone notch machining equipment comprises a clamp part, a working part and a control system. The working part comprises a saw beam, a saw beam guide track and a saw blade. The saw beam guide track is fixedly arranged relative to the clamp part. The saw beam is arranged on the saw beam guide track in a sliding mode. The saw blade is arranged on the saw beam. The clamp part is arranged relative to the saw blade. The control system comprises a saw blade advance control system which is connected with a power system of the saw blade. According to the DWTT sample herringbone notch machining equipment, machining accuracy of a sample notch is guaranteed, a displacement zero point is automatically judged in an advance control process of the saw blade, and therefore practical width of a sample does not need to be considered, operation is simple, working efficiency is improved, and labor intensity is lowered.
Description
Technical field
The invention belongs to machinery manufacturing technology field, relate to the chevron shaped breach process equipment of a kind of pipe line steel DWTT sample.
Background technology
Along with the development of world oil gas industry, just towards the future development of major diameter, large wall thickness, high-pressure delivery, this just requires pipe line steel to have high strength and high tenacity in the construction of long-distance transport pipes.DWTT (DWTT) is a kind of important method for evaluation brittle fracture and ductile fracture performance, for obtaining to have the crack arrest characteristic pipe line steel of good ductility fracture, provides important inspection and test foundation.pipe line steel DWTT test standard commonly used has API RP 5L3-1996 (THIRD EDITION) at present, 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), according to each standard code, the sample break form comprises press type and chevron shaped breach, the press type breach adopts the speciality steel push type broach with regulation blade angle to suppress, chevron shaped breach adopts 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 tubulation enterprise substantially all adopts the press type breach to carry out the DWTT test, be on the one hand lower due to before this general grade of steel toughness of pipe line steel, wall thickness is thinner, processing press type breach can be hammered the sample that breaks fully into shape under the drop weight test of 50000J energy; On the other hand, the press type breach is easy to process, and present domestic tubulation enterprise adopts the mode of artificial handsaw to carry out to the breach processing of chevron shaped notched specimen usually, and the method labour intensity is large, operating efficiency low and the breach machining accuracy is poor.But along with the raising of pipeline steel strength and toughness, and the continuous increase of wall thickness, DWTT is also more and more higher to the requirement of testing equipment and test level.The Drop Weight Tear Tester design maximum ability of present domestic pipe line steel is 50000J, and so high energy can be hammered disconnected most of samples into shape, but tests for the submerged pipeline DWTT of some high-strength and high ductility heavy walls, or existing problems.For example, domestic certain submerged pipeline Project design pressure is up to 23.9MPa at present, be rare high-pressure natural gas conveyance conduit in world wide, the design wall thickness of sea pipe is up to 31.8mm, grade of steel reaches X70, in the project implementation process, when adopting the press type breach to test, following situation appearred on ceiling capacity is the testing machine of 50000J:
1) when adopting press type breach total wall thickness sample to test, due to the high-intensity high-tenacity of material, often appearance can't be hammered the phenomenon of disconnected sample into shape.
2) according to standard-required, can adopt the attenuate sample and reduce the method that temperature compensates and test, but due to the impact that is subjected to discontinuity of materials, ductile-brittle transition temperature, Percentage of Shear Fracture For Fracture Surface evaluation method and attenuate sample processing method, the actual performance that the method can not the complete reaction material.
3) when the limit capacity that adopts testing machine is tested, hammer sword and two phenomenons that bearing damages of this equipment often appear.
Therefore, for the higher pipe line steel of toughness, ordinary priority selects chevron shaped breach (Cheveron Notch) sample to test, chevron shaped breach form as shown in Figure 1, this breach can be eliminated the too much primary power relevant with the higher pipe line steel of some toughness.For example, for " West-east Gas engineering grade of steel used is that X70, wall thickness are the pipe line steel of 14.6mm; its Charpy-V impact power measured value is generally 260～460 joules, adopts chevron shaped breach to carry out the disconnected energy of the needed hammer of DWTT and carries out 3000～4000 joules of the disconnected energy minimizings of the needed hammer of DWTT than adopting pressed notch.For the material more than the 25.4mm wall thickness, there is no data declaration in standard, but from each standard about the summer than v-notch standard size impact specimen impact absorbing energy and pressed notch, the endergonic near-sighted graph of a relation of chevron shaped breach DWTT, its capacity volume variance can be larger.Therefore, adopt chevron shaped breach not only to reduce the work hardening that v-notch occurs in pressing process, and the reduction of the disconnected energy of the required hammer service life that can improve equipment.
Therefore, adopt the disconnected energy of the required hammer of press type breach to surpass the maximum drop hammer tester design energy of domestic tubulation industry based on high grade of steel thick-wall pipeline steel DWTT sample of the prior art, and tubulation enterprise adopts the situation of the chevron shaped breach of manual mode processing mostly, be badly in need of a kind of chevron shaped breach process equipment of invention, with the utilization rate of guarantee test equipment, reduce labour intensity and raise labour efficiency.
Summary of the invention
The object of the invention is to design a kind of process equipment of the novel chevron shaped breach of DWTT sample, address the above problem.
To achieve these goals, the technical solution used in the present invention is as follows:
The process equipment of the chevron shaped breach of a kind of DWTT sample, comprise the section of clamping, operate portions and control system, described operate portions comprises saw beam, saw beam guide rail and saw blade, described saw beam guide rail is fixedly installed with respect to the described section of clamping, the setting of sliding on described saw beam guide rail of described saw beam, described saw blade is arranged on described saw beam; Describedly clamp section and described saw blade is oppositely arranged, described control system comprises the saw blade control system of advancing, and the described saw blade control system of advancing is connected with the dynamical system of described saw blade.
The described section of clamping comprises fixture and sample fixation screw silk, and described fixture comprises sample fixing, and the cell wall of described sample fixing is provided with the sample fixation screw hole, and described sample fixation screw silk matches with described sample fixation screw hole.
The described section of clamping also comprises base and latch, described base is provided with the vertical rotary hole, described fixture is arranged on the upper surface of described base, be fixed with the vertical rotary post on the bottom of described fixture, the described vertical rotary post described vertical rotary of insertion hole, be 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.
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 provided with two groups at least.
Described sample fixation screw silk and described sample fixation screw hole are provided with two groups, and all are positioned on the cell wall of described sample fixing the same side.
Described saw blade advance control system comprise saw blade flexural deformation sniffer and the monitoring described saw blade cut the saw overall process the analog input output module, described saw blade flexural deformation sniffer is connected with described analog input output module.
Described analog input output module comprises feedback module, described feedback module be used for described saw blade flexural deformation detection to described saw blade because of painstaking when beginning to produce flexural deformation the progress point at described saw blade place be set to the zero displacement point of advancing of described saw blade.
Described analog input output module also comprises threshold module, described threshold module be used for described saw blade flexural deformation detection to described saw blade during because of the threshold values that produces painstakingly flexural deformation and reach described set-up of control system, the gait of march of the described saw blade of reduction or close advancing of described saw blade.
Beneficial effect of the present invention can be summarized as follows:
1, the working depth of breach of the present invention can realize the self-regulating function of control automatically and cutting speed after program setting, has guaranteed the machining accuracy of sample break;
2, according to standard code, the precision of specimen width is 76.2 ± 3mm or 76.2 ± 1.5mm (each standard is slightly different to the requirement of sample precision), therefore the maximum difference of the width of qualified sample can reach 6mm, but due to saw blade of the present invention automatic decision zero displacement point in the control procedure of advancing, therefore need not to consider again the developed width of sample;
3, the present invention only need set parameter of wall thickness for the procedure of same specification (thickness) sample, and is simple to operate;
4, sample of the present invention only needs a clamping, after cutting saw sample breach on one side, after 180 °, rotation sample, directly at the same position machining gap of sample opposite side, need not centering again, has improved operating efficiency;
5, need not too many manually-operated in sample process of the present invention, reduced labour intensity, improved operating efficiency.
Description of drawings
Fig. 1 is the schematic diagram of chevron shaped breach form in prior art;
Fig. 2 is the structural representation that the master of fixture of the present invention looks;
Fig. 3 is the structural representation of the side-looking of fixture of the present invention;
Fig. 4 is the structural representation of side-looking of the present invention;
Fig. 5 installs the structural representation that the master of section looks additional in the present invention.
The specific embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As the process equipment of Fig. 2 to the chevron shaped breach of a kind of DWTT sample shown in Figure 5, comprise the section of clamping, operate portions and control system, described operate portions comprises saw beam 7, saw beam guide rail 12 and saw blade 8, described saw beam guide rail 12 is fixedly installed with respect to the described section of clamping, the setting of sliding on described saw beam guide rail 12 of described saw beam 7, described saw blade 8 is arranged on described saw beam 7; Describedly clamp section and described saw blade 8 is oppositely arranged, described control system comprises the saw blade control system 11 of advancing, and the described saw blade control system 11 of advancing is connected with the dynamical system of described saw blade 8;
The described section of clamping comprises fixture 3, sample fixation screw silk 5, base 1 and latch, described fixture 3 comprises sample fixing 6, the cell wall of described sample fixing 6 is provided with the sample fixation screw hole, described sample fixation screw silk 5 matches with described sample fixation screw hole, and described sample fixation screw silk 5 and described sample fixation screw hole are provided with two groups and all be positioned on the cell wall of described sample fixing 6 the same sides; Described base 1 is provided with vertical rotary hole 9, described fixture 3 is arranged on the upper surface of described base 1, be fixed with vertical rotary post 10 on the bottom of described fixture 3, described vertical rotary post 10 inserts described vertical rotary hole 9, be equipped with pin hole 4 on the correspondence position in described vertical rotary post 10 and described vertical rotary hole 9, described pin hole 4 on described vertical rotary hole 9 runs through described base 1, described latch matches with described pin hole 4, described pin hole 4 is square opening, and described latch is square latch;
Described saw blade advance control system 11 comprise saw blade flexural deformation sniffer and the monitoring described saw blade 8 cut the saw overall process the analog input output module, described saw blade flexural deformation sniffer is connected with described analog input output module, described analog input output module comprises feedback module, described feedback module be used for described saw blade flexural deformation detection to described saw blade 8 because of painstaking when beginning to produce flexural deformation the progress point at described saw blade 8 places be set to the zero displacement point of advancing of described saw blade 8; Described analog input output module also comprises threshold module, described threshold module be used for described saw blade flexural deformation detection to described saw blade 8, reduce the gait of march of described saw blade 8 or close advancing of described saw blade 8 when producing the threshold values that flexural deformation reaches described set-up of control system because of painstaking.
The advance analog input output module of control system 11 of saw blade, the overall process of cutting saw is monitored: sawing machine increases the feedback to saw blade 8 distortion, setting the breach working depth in control system is 0.5t+5mm, saw blade 8 is appearring for the first time when producing diastrophic feedback painstakingly, system's automatic decision saw blade 8 has contacted sample 2, set herein and to advance zero point of displacement for saw blade 8, until 8 times line displacements of saw blade are when reaching 0.5t+5mm, judgement sample 2 one side breach are completion of processing, and saw blade 8 withdraws from automatically; Simultaneously, in the process of processing, the valve thresholding of setup control saw blade 8 bendings, in whole cutting process, by the continuous feedback to saw blade 8 deflections, when saw blade 8 bendings reached the valve thresholding of system, system underspeeded or closes feeding, thereby realize guaranteeing the breach surface quality to cutting the self adaptation adjustment of saw speed.
The specific implementation process of the chevron shaped breach process equipment of pipe line steel DWTT sample is as follows:
1) sample 2 that will treat gap is positioned in fixture 3, the specimen width of standard-required is 305 ± 5mm, fixture 3 width designs are 310mm, therefore the distance at the two ends by range estimation fixture 3 and sample 2 two ends when placing, can judge roughly that whether sample 2 aligns, and then tightens two fixed screws;
2) Fixed latches is inserted through in the square opening of fixture 3 swingles and base 1, stationary fixture 3 can not rotate;
3) input t value in the control program that saw blade 8 is advanced, start-up routine, the breach of beginning processing sample 2 one sides;
4) after sample 2 one side breach completion of processing, extract Fixed latches, after rotary clamp 3 reaches 180 °, then Fixed latches is inserted in square opening, start-up routine is until the breach completion of processing of sample 2 opposite sides can be taken off sample 2.
More than by the detailed description of concrete and preferred embodiment the present invention; but those skilled in the art should be understood that; the present invention is not limited to the above embodiment; within the spirit and principles in the present invention all; any modification of doing, be equal to replacement etc., within protection scope of the present invention all should be included in.
Claims (10)
1. the process equipment of the chevron shaped breach of DWTT sample, it is characterized in that: comprise the section of clamping, operate portions and control system, described operate portions comprises saw beam, saw beam guide rail and saw blade, described saw beam guide rail is fixedly installed with respect to the described section of clamping, the setting of sliding on described saw beam guide rail of described saw beam, described saw blade is arranged on described saw beam; Describedly clamp section and described saw blade is oppositely arranged, described control system comprises the saw blade control system of advancing, and the described saw blade control system of advancing is connected with the dynamical system of described saw blade.
2. the process equipment of the chevron shaped breach of DWTT sample according to claim 1, it is characterized in that: the described section of clamping comprises fixture and sample fixation screw silk, described fixture comprises sample fixing, the cell wall of described sample fixing is provided with the sample fixation screw hole, and described sample fixation screw silk matches with described sample fixation screw hole.
3. the process equipment of the chevron shaped breach of DWTT sample according to claim 2, it is characterized in that: the described section of clamping also comprises base and latch, described base is provided with the vertical rotary hole, described fixture is arranged on the upper surface of described base, fix direct rotary rotary column in distress on the bottom of described fixture, described difficult direct rotary rotary column inserts described vertical rotary hole, is equipped with pin hole on the correspondence position in described vertical rotary post and described vertical rotary hole, and described latch matches with described pin hole.
4. the process equipment of the chevron shaped breach of DWTT sample according to claim 3 is characterized in that: the described pin hole on described vertical rotary hole runs through described base.
5. the process equipment of the chevron shaped breach of DWTT sample according to claim 3, it is characterized in that: described pin hole is square opening, described latch is square latch.
6. the process equipment of the chevron shaped breach of DWTT sample according to claim 3 is characterized in that: described sample fixation screw silk and described sample fixation screw hole are provided with two groups at least.
7. the process equipment of the chevron shaped breach of DWTT sample according to claim 6 is characterized in that: described sample fixation screw silk and described sample fixation screw hole are provided with two groups, and all are positioned on the cell wall of described sample fixing the same side.
According to claim 1 to 7 one of any chevron shaped breach of described DWTT sample process equipment, it is characterized in that: described saw blade advance control system comprise saw blade flexural deformation sniffer and the monitoring described saw blade cut the saw overall process the analog input output module, described saw blade flexural deformation sniffer is connected with described analog input output module.
9. the process equipment of the chevron shaped breach of DWTT sample according to claim 8, it is characterized in that: described analog input output module comprises feedback module, described feedback module be used for described saw blade flexural deformation detection to described saw blade because of painstaking when beginning to produce flexural deformation the progress point at described saw blade place be set to the zero displacement point of advancing of described saw blade.
10. the process equipment of the chevron shaped breach of DWTT sample according to claim 9, it is characterized in that: described analog input output module also comprises threshold module, described threshold module be used for described saw blade flexural deformation detection to described saw blade during because of the threshold values that produces painstakingly flexural deformation and reach described set-up of control system, the gait of march of the described saw blade of reduction or close advancing 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 |
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| CN103170679A true CN103170679A (en) | 2013-06-26 |
| CN103170679B 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092335A (en) * | 2015-08-26 | 2015-11-25 | 中国石油天然气集团公司 | Sample with DWTT (drop weight tear test) abnormal fracture preventing function and method for manufacturing sample |
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092335A (en) * | 2015-08-26 | 2015-11-25 | 中国石油天然气集团公司 | Sample with DWTT (drop weight tear test) abnormal fracture preventing function and method for manufacturing sample |
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| CN103170679B (en) | 2016-08-24 |
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