CN106018082A - Method for applying tension load to special-shaped profile sectional material - Google Patents

Method for applying tension load to special-shaped profile sectional material Download PDF

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Publication number
CN106018082A
CN106018082A CN201610322350.9A CN201610322350A CN106018082A CN 106018082 A CN106018082 A CN 106018082A CN 201610322350 A CN201610322350 A CN 201610322350A CN 106018082 A CN106018082 A CN 106018082A
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China
Prior art keywords
special
bar
shaped
tensile load
alloy
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CN201610322350.9A
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CN106018082B (en
Inventor
赵占文
苏雁飞
陈军
侯瑞
李军贵
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Xian Aircraft Design and Research Institute of AVIC
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Xian Aircraft Design and Research Institute of AVIC
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001Type of application of the stress
    • G01N2203/0003Steady
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0017Tensile

Abstract

The invention relates to a method for applying a tension load to a special-shaped profile sectional material and belongs to the field of airplane structure intensity testing. The method comprises the steps of arranging a tension angle box firstly to be used for accommodating the end of the special-shaped profile sectional material; conducting fixation with low-melting-point alloy, wherein the melting point of the alloy is lower than that of the special-shaped profile sectional material and that of the tension angle box and higher than the highest temperature during tension testing; finally applying the tension load to the tension angle box after the alloy is solidified. By the adoption of the method, tension loads can be applied to various profile sectional materials without additionally designing a butt joint part, the adopted low-melting-point alloy and the designed tension angle box can be repeatedly used, and then test cost is reduced.

Description

A kind of method that special-shaped section section bar applies tensile load
Technical field
The invention belongs to aircraft structure strength test field, particularly relate to a kind of special-shaped section section bar and apply to draw The method stretching load.
Background technology
When carrying out various section section bar or various section section bar docking tensile strength test, the most generally use Method be that design docking bogusware and tension test part are by stretching dock applying on bogusware after being mechanically connected Load, but for some section shapes and the section bar of complexity thereof, it is called for short contoured cross section section bar, cause docking The design of bogusware and complexity thereof, even for the section bar that some sections are less and complex-shaped, it is impossible to by setting Meter docking bogusware carries out being mechanically connected applying tensile load.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of special-shaped section section bar and apply the side of tensile load Method.Concrete, the method for the invention includes:
S1, arranging stretching angle box, described stretching angle box is provided with an opening surface and tensile load loading end, When tensile load acts on described tensile load loading end, the line of force of described tensile load is along described opening surface Center point to the center of described stretching angle box;
S2, the end of described special-shaped section section bar is placed in the box of described stretching angle, and described special-shaped profile There is between the section centre of form and the described line of force of material certain eccentric distance e, wherein, described eccentric distance e big Little obtain according to demand eccentric load during tension test;
S3, melted alloy of casting in the box of described stretching angle, described alloy melting point is less than described special-shaped section Section bar and the fusing point of described stretching angle box, and described alloy melting point is higher than the highest temperature during tension test Degree;
S4, until described alloy solidify after, to described stretching angle box apply tensile load.
Preferably, described alloy be fusing point be the bismuth alloy of 70 °.
In such scheme preferably, by described contoured cross section section bar along being perpendicular to described special-shaped section section bar Section is divided into some flat square strips, and the axis of the section being perpendicular to described special-shaped section section bar is described The length direction of special-shaped section section bar, limit longer on section is the width of described special-shaped section section bar, Limit shorter on section is the thickness degree direction of special-shaped section section bar, and described eccentric distance e is more than or equal to 0, and Width less than or equal to the longest flat square strip of described special-shaped section section bar.
Compared with prior art: the one that the present invention proposes carries out abnormal shape by casting low-melting point metal alloy Section bar is fixed thus the method that applies tensile load, it is not necessary to additional designs docking bogusware again, to various sections Section bar all can apply tensile load, and the stretching angle box of the low-melting point metal alloy simultaneously selected and design can weigh Multiple application, reduces experimentation cost.
Accompanying drawing explanation
Fig. 1 is the stretching that abnormal shape section section bar of the present invention applies a preferred embodiment of the method for tensile load Angle box and special-shaped section section bar position relationship schematic diagram.
Fig. 2 is the stretching angle box of embodiment illustrated in fig. 1 and schematic diagram fixed by special-shaped section section bar.
Fig. 3 is the special-shaped section section bar centre of form and the relation signal of stretching box center, angle of embodiment illustrated in fig. 1 Figure.
Wherein, 1 is the first special-shaped section section bar, and 2 is the second special-shaped section section bar, and 3 is stretching angle box, 4 For alloy.
Detailed description of the invention
Clearer, below in conjunction with the present invention for the purpose making the present invention implement, technical scheme and advantage Accompanying drawing in embodiment, is further described in more detail the technical scheme in the embodiment of the present invention.Attached In figure, the most same or similar label represents same or similar element or has same or like The element of function.Described embodiment is a part of embodiment of the present invention rather than whole enforcement Example.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to be used for explaining the present invention, and It is not considered as limiting the invention.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under not making creative work premise, broadly falls into present invention protection Scope.Below in conjunction with the accompanying drawings embodiments of the invention are described in detail.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " horizontal stroke To ", "front", "rear", "left", "right", " vertically ", " level ", " top ", Orientation or the position relationship of the instruction such as " end " " interior ", " outward " are based on orientation shown in the drawings or position Put relation, be for only for ease of and describe the present invention and simplify description rather than instruction or the dress of hint indication Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that Limiting the scope of the invention.
Below by embodiment, the present invention is described in further details.
The invention provides a kind of method that special-shaped section section bar applies tensile load, mainly include following step Rapid:
S1, arranging stretching angle box, described stretching angle box is provided with an opening surface and tensile load loading end, When tensile load acts on described tensile load loading end, the line of force of described tensile load is along described opening surface Center point to the center of described stretching angle box;
S2, the end of described special-shaped section section bar is placed in the box of described stretching angle, and described special-shaped profile There is between the section centre of form and the described line of force of material certain eccentric distance e, wherein, described eccentric distance e big Little obtain according to demand eccentric load during tension test;
S3, melted alloy of casting in the box of described stretching angle, described alloy melting point is less than described special-shaped section Section bar and the fusing point of described stretching angle box, and described alloy melting point is higher than the highest temperature during tension test Degree;
S4, until described alloy solidify after, to described stretching angle box apply tensile load.
In the present embodiment, described alloy be fusing point be the bismuth alloy of 70 °.
Firstly the need of explanation, in the present embodiment, contoured cross section section bar is mostly irregular strip, fixed The axis that straight line is described contoured cross section section bar at the longer place, limit of the irregular strip of justice, or length side To, as it is shown in figure 1, two ends that strip two ends are described contoured cross section section bar, between both ends Line is the length direction of contoured cross section section bar, and vertically cutting the face that this length direction obtains is described contoured cross section The section of section bar.
Above-mentioned section can be divided into the flat square strip of some rules, or it is to be understood that described different Shape section section bar is divided into some flat square strips, such as figure along the section being perpendicular to described special-shaped section section bar The section that being positioned in 3 stretches within angle box 3 can be divided into two rectangles and a semicircle, this reality Execute in example, owing to semicircular structure accounts for smaller, semicircle can be equivalent to the length of side equal to semicircle radius Square structure, wherein, the width of rectangular a length of described contoured cross section section bar, rectangular width Thickness direction for described contoured cross section section bar.
As it is shown in figure 1, the present embodiment be used for judging the first special-shaped section section bar 1 and with the first special-shaped section Bonding strength between the second special-shaped section section bar 2 that section bar 1 connects, due to two special-shaped section section bars End face is irregular, if directly use tensioning member to carry out tension test, tensile load cannot act on uniformly On end face, to this end, first the present embodiment gives a stretching angle box 3, as shown in Figures 1 and 2, The end face of stretching angle box 3 is uncovered, and the volume of tensile load enough lays the end of described special-shaped section section bar Portion, meanwhile, stretching angle box 3 is additionally provided with stretching end, such as arranges auricle, screw etc., its be used for Stretching pressurized strut is attached, and when connecting stretching pressurized strut, stretching pressurized strut it is applied pulling force, draws The direction of power is the center pointing to stretching angle box from the center of open face, in an alternate embodiment, draws The straight line at power place can also be other parallel and center of open face and the line of centres stretching angle box.
In the present embodiment, after the described second special-shaped section section bar 2 is placed in stretching angle box 3, such as Fig. 2 Shown in, it is built in the alloy 4 of low melting point to described stretching angle box 3, it is to be understood that prioritizing selection is low Melting metal alloys includes selecting "dead", fusing point higher than maximum temperature during tension test and less than examination Test the low-melting point metal alloy of part fusing point, be cast to the low-melting point metal alloy of fusing stretch in the box of angle, directly Solidify to low-melting point metal alloy, finally the testpieces poured being installed on testing machine applies stretching and carries Lotus.
In the present embodiment, the end of described special-shaped section section bar is placed in the box of described stretching angle, and described different The section centre of form of type profile section bar deviates described line of force certain distance, concrete, as it is shown on figure 3, described from Line hands over described stretching angle box in C point, and O point is the section centre of form of described contoured cross section section bar, this distance e Scope is generally: described eccentric distance e is more than or equal to 0, and in general, described eccentric distance e is also less than equal to The width of the longest flat square strip of described special-shaped section section bar.
It should be noted that owing to the end of special-shaped section section bar may be irregular structure, the most not Regular texture, in addition in irregular shape as described section, also includes that it can the most not parallel and institute Stating section, i.e. it is rough structure, thus, when described special-shaped section section bar is divided into several During flat square strip, the length of each flat square strip may be different.
It is understood that the size of eccentric distance e is obtained according to demand eccentric load during tension test, when When test is made without applying eccentric load, eccentric distance e is 0, when needs carry out applying eccentric load, First the size of eccentric distance e is calculated according to FEM (finite element) model, afterwards according to the size of e to stretching angle box 3 Be designed so that its meet can accommodate described contoured cross section profiled ends while, have enough spaces The section centre of form making special-shaped section section bar deviates the distance of described line of force e.
Compared with prior art: the one that the present invention proposes carries out abnormal shape by casting low-melting point metal alloy Section bar is fixed thus the method that applies tensile load, it is not necessary to additional designs docking bogusware again, to various sections Section bar all can apply tensile load, and the stretching angle box of the low-melting point metal alloy simultaneously selected and design can weigh Multiple application, reduces experimentation cost.
Last it is noted that above example is only in order to illustrate technical scheme, rather than right It limits.Although the present invention being described in detail with reference to previous embodiment, the common skill of this area Art personnel it is understood that the technical scheme described in foregoing embodiments still can be modified by it, Or wherein portion of techniques feature is carried out equivalent;And these amendments or replacement, do not make corresponding The essence of technical scheme departs from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (3)

1. the method that a special-shaped section section bar applies tensile load, it is characterised in that including:
S1, arranging stretching angle box, described stretching angle box is provided with an opening surface and tensile load loading end, When tensile load acts on described tensile load loading end, the line of force of described tensile load is along described opening surface Center point to the center of described stretching angle box;
S2, the end of described special-shaped section section bar is placed in the box of described stretching angle, and described special-shaped profile There is between the section centre of form and the described line of force of material certain eccentric distance e, wherein, described eccentric distance e big Little obtain according to demand eccentric load during tension test.
S3, melted alloy of casting in the box of described stretching angle, described alloy melting point is less than described special-shaped section Section bar and the fusing point of described stretching angle box, and described alloy melting point is higher than the highest temperature during tension test Degree;
S4, until described alloy solidify after, to described stretching angle box apply tensile load.
2. the method that special-shaped section section bar as claimed in claim 1 applies tensile load, it is characterised in that: Described alloy be fusing point be the bismuth alloy of 70 °.
3. the method that special-shaped section section bar as claimed in claim 1 applies tensile load, it is characterised in that: Described contoured cross section section bar is divided into some flat square along the section being perpendicular to described special-shaped section section bar Strip, the axis of the section being perpendicular to described special-shaped section section bar is the length side of described special-shaped section section bar To, limit longer on section is the width of described special-shaped section section bar, and limit shorter on section is special-shaped The thickness degree direction of section section bar, described eccentric distance e is more than or equal to 0, and less than or equal to described special-shaped section The width of the longest flat square strip of section bar.
CN201610322350.9A 2016-05-16 2016-05-16 A kind of method that abnormal shape section profile applies tensile load Active CN106018082B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239733B2 (en) * 1982-04-16 1990-09-06 Daido Metal Co
CN1119564A (en) * 1994-05-25 1996-04-03 吉田桂一郎 Upestting forger for working wire with iso-section
CN2455999Y (en) * 2001-01-02 2001-10-24 王玉生 Sectional material
JP3960951B2 (en) * 2003-06-18 2007-08-15 トヨタ自動車株式会社 Evaluation method of die casting mold release agent or lubricant
CN201218785Y (en) * 2007-01-31 2009-04-08 韩国线材株式会社 End enclosure forming mold used for steel cable fracture test
KR20130066089A (en) * 2011-12-12 2013-06-20 현대중공업 주식회사 Mold device for quality testing of casting
CN203869945U (en) * 2014-04-30 2014-10-08 淮北中成检测有限公司 Tension destruction test fixture for steel wire rope
CN105004591A (en) * 2015-08-03 2015-10-28 中钢集团郑州金属制品研究院有限公司 Steel wire rope breaking and stretching casting object and device of casting test method thereof
CN105928790A (en) * 2016-07-12 2016-09-07 攀钢集团研究院有限公司 Steel strand tensile test method

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0239733B2 (en) * 1982-04-16 1990-09-06 Daido Metal Co
CN1119564A (en) * 1994-05-25 1996-04-03 吉田桂一郎 Upestting forger for working wire with iso-section
CN2455999Y (en) * 2001-01-02 2001-10-24 王玉生 Sectional material
JP3960951B2 (en) * 2003-06-18 2007-08-15 トヨタ自動車株式会社 Evaluation method of die casting mold release agent or lubricant
CN201218785Y (en) * 2007-01-31 2009-04-08 韩国线材株式会社 End enclosure forming mold used for steel cable fracture test
KR20130066089A (en) * 2011-12-12 2013-06-20 현대중공업 주식회사 Mold device for quality testing of casting
CN203869945U (en) * 2014-04-30 2014-10-08 淮北中成检测有限公司 Tension destruction test fixture for steel wire rope
CN105004591A (en) * 2015-08-03 2015-10-28 中钢集团郑州金属制品研究院有限公司 Steel wire rope breaking and stretching casting object and device of casting test method thereof
CN105928790A (en) * 2016-07-12 2016-09-07 攀钢集团研究院有限公司 Steel strand tensile test method

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