CN105352715B - A kind of method of testing of drilling tool load pressure bending separation - Google Patents
A kind of method of testing of drilling tool load pressure bending separation Download PDFInfo
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- CN105352715B CN105352715B CN201510825193.9A CN201510825193A CN105352715B CN 105352715 B CN105352715 B CN 105352715B CN 201510825193 A CN201510825193 A CN 201510825193A CN 105352715 B CN105352715 B CN 105352715B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
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Abstract
A kind of method of testing of drilling tool load pressure bending separation, first with equidistantly choosing on cylindrical bar cross section of the drilling tool with size at 3 points, and strain transducer measurement axial strain is placed respectively, place a strain transducer measurement direction strain in other directions at any point, then by establishing screw thread rod model, cylinder rod model in finite element emulation software, the shearing stress ratio of difference, drilling tool and the cylindrical bar of drilling tool axial tension stress and cylindrical bar axial tension stress on same inclined-plane is obtained, the axle power, moment of flexure, moment of torsion of drilling tool is finally calculated.The present invention is compared with prior art using drilling tool as the product after being superimposed screw thread with the cylindrical bar of size with drilling tool, by measuring the strain at the axial strain and any point at 3 points on other directions, realize the separation test of the axle power of combined load, moment of flexure and moment of torsion, have method it is simple, accurately and reliably the advantages of.
Description
Technical field
The present invention relates to mechanical engineering field, particularly a kind of method of testing of drilling tool load pressure bending separation.
Background technology
The industries such as drilling apparatus is widely used in oil and geological prospecting, building and mine are mined, drill bit in drilling process
With the drilling tool of drilling rod composition can simultaneously by the effect of axial compressive force (referred to as " axle power "), moment of flexure and moment of torsion, three kinds of parameters it is big
It is small to be related to the smooth degree of drilling process and the height of drilling efficiency.
Existing research method or technology mainly concentrate measurement moment of flexure and the compound action of moment of torsion, axle power and moment of torsion, such as
Moment of flexure under combined deformation is detected with moment of torsion with ohmer, axle power moment of torsion is measured, this method of testing will not
The power of axle power, moment of flexure and moment of torsion three's coupling is loaded into capable separation, therefore lacks a kind of above-mentioned three power of drilling rod under actual condition
Learn the method for testing of parameters separated.
The content of the invention
Present invention solves the technical problem that it is：Overcome the deficiencies in the prior art, there is provided a kind of by measuring on the outside of drilling rod
Face is located in the case of the strain on other directions at axial strain and any point in same interface at 3 points realizes combined load
The method of testing of the drilling tool load pressure bending separation of axle power, moment of flexure and moment of torsion separation test.
The present invention technical solution be：A kind of method of testing of drilling tool load pressure bending separation, comprises the following steps：
(1) three point A, B that equidistantly distributed is taken on circumference are being handed over cylindrical bar cross section and the side of size with drilling tool
And C, place strain transducer 1, strain transducer 2, strain transducer 3 respectively on point A, B and C, where A points side and with
Axially a strain transducer 4 is placed in γ angular positions；
(2) respectively using the axle at strain transducer 1, strain transducer 2, the corresponding measurement point of A, B, C tri- of strain transducer 3
To strain, and ε is designated as respectivelyA、εB、εC, A points place side is measured and with being in axially answering for γ angular direction using strain transducer 4
Become εγ；
(3) drilling tool length, external diameter, internal diameter, screw wing height, width, pitch, head are inputted in finite element emulation software
Number, establishes screw thread rod model, then input material, material characteristic parameter, load, the way of restraint, obtains drilling tool side any point
Axial stress, input and drilling tool establish cylindrical bar with cylinder pole length, external diameter, the internal diameter of size in finite element emulation software
Model, then input material, material characteristic parameter, load and the way of restraint, are obtained any with drilling tool side on cylindrical bar side
The axial stress of point position identical point, and two axial stresses are made the difference to obtain drilling tool axial tension stress and cylindrical bar axial stress
The difference DELTA of value；
(4) drilling tool length, external diameter, internal diameter, screw wing height, width, pitch, head number are inputted to finite element emulation software,
Screw thread rod model is established, then input material, material characteristic parameter, load, the way of restraint, draws the shear Stress Distribution of drilling tool,
Cylinder rod model is established with cylinder pole length, external diameter, the internal diameter of size with drilling tool to finite element emulation software input, it is then defeated
Enter material, material characteristic parameter, load, the way of restraint, obtain the shear Stress Distribution of cylindrical bar, and then obtain drilling tool with being in axially
Shearing stress ratio k of the shearing stress, cylindrical bar of γ angular direction side with axial direction in γ angular direction side；
(5) the axle power F of drilling tool is calculatednFor
Moment M is
Torque T is
Wherein, S is the cylindrical bar cross section with drilling tool with size, and E is the Young's modulus of elasticity of drilling tool material, and R is and brill
Have the cylindrical bar cross sectional radius with size, IzFor the moment of inertia with drilling tool with the cylindrical bar of size, sin (2 γ)=a, μ is brill
Have the Poisson's ratio of material, cos (2 γ)=b.
Described finite element emulation software is ANSYS.
Described material characteristic parameter includes density, modulus of elasticity, Poisson's ratio, yield strength.
The present invention compared with prior art the advantages of be：
(1) at the axial strain and any point that the present invention is located in same interface at 3 points by measuring drilling rod lateral surface
Strain on other directions, so that it may realize that the separation of the axle power, moment of flexure and moment of torsion of combined load is tested, solve axle power, moment of flexure
Carry separation problem with the power of moment of torsion three's coupling, have method it is simple, accurately and reliably the advantages of；
(2) present invention carries separation by the power of axle power, moment of flexure and moment of torsion three's coupling, solves in Practical Project and bores
Has the problem of complex load decoupling test, application includes cylinder drilling rod, pipe drilling rod, screw thread column drilling rod, threaded tubular
The structures such as drilling rod, have can on-line real-time measuremen the advantages of；
(3) present invention compared with prior art, using drilling tool as the production after being superimposed screw thread with the cylindrical bar of size with drilling tool
Thing, obtains drilling tool, the axial stress of cylindrical bar, shear strain are distributed correction by simulation software, and then obtains drilling tool axle power, curved
Square and moment of torsion solution.
Brief description of the drawings
Fig. 1 is cylindrical bar force diagram in a kind of method of testing of drilling tool load pressure bending separation of the present invention；
Fig. 2 is strain transducer position force diagram in a kind of method of testing of drilling tool load pressure bending separation of the present invention, should
Become sensor 1, strain transducer 2, strain transducer 3 to be used for surveying drilling rod axial strain, strain transducer 4 is used for surveying to be passed with strain
Strain of the sensor 3 into γ angular direction.
Embodiment
The present invention in view of the shortcomings of the prior art, it is proposed that one kind based on strain monitoring realize to drilling tool axle power, moment of flexure and
The method of moment of torsion separation test, by same size cylindrical bar strain monitoring, realizing the separation of its combined load mechanics parameter, so
Correction is obtained by emulating afterwards, and then realizes the separation to screw rod mechanics parameter, below in conjunction with the accompanying drawings to the inventive method
It is described in detail.
First, the separation of cylindrical bar mechanics parameter
As shown in figure 1, equidistantly divide handing over to take on circumference with side with the cylindrical bar cross section of size with drilling apparatus
Three point A, B and C of cloth, center of circle O, as shown in Figure 2 invention introduces 4 strain transducers, wherein three (strain transducers
1st, strain transducer 2, strain transducer 3) it is affixed on A, B, C respectively in axial direction at 3 points, 3 axial stresses of note are respectively σA、σΒ、
σC, any point (such as A points) place side and axial direction in 3 points of A, B, C are in γ angular direction one strain transducer 4 of patch, then cylinder
Axle power F suffered by barnIt is respectively with moment M
Wherein, R, S=π R2And Iz=π R4/ 4 be respectively section radius, sectional area and the moment of inertia of cylindrical bar, and AO is with treating for note
The central angle of lateral bending square force couple role point line is α α, then
A, strain transducer detection object axially placed at the point of B, C tri- is strain, A, B, C, remembers that axially should at 3 points at 3 points
It is respectively ε to becomeA、εB、εC, the Young's modulus of elasticity of drilling tool material is E, and the position can be obtained using the relation of stress and strain
Stress value, it is respectively
σA=E εA (4)
σB=E εB (5)
σC=E εC (6)
Recycling formula (1) and formula (2), the axle power F of cylindrical bar can be isolatednAnd moment M.
Meanwhile 3 points of stress can also use axle power FnRepresented with moment M：
Note shearing stress is τ, then the torque T for being applied to cylindrical bar is
T=τ Wρ (10)
Wherein, WρFor Torsion Section coefficient.
The shearing stress τ of the lower cylindrical bar of pure torsion effect is directly proportional to shear strain, and its ratio is shear modulus, but in compound load
Under lotus effect, the relation of shearing stress τ and shear strain meets generalized Hooke law.
A strain transducer is pasted in any point (such as A points) place side in 3 points of A, B, C with axial direction in γ angular direction,
The strain measured is εγ, the Young's modulus of elasticity of note drilling tool material is E, Poisson's ratio μ, shearing stress
Remember sin (2 γ)=a, cos (2 γ)=b, cylindrical bar Torsion Section coefficient Wρ=π R3/ 2, this pattern (10) is changed into
To sum up, same position both direction strain detecting is passed through, it may be determined that the moment of torsion of the cylindrical bar position.
(1), (2) and (3) formula shows, determines same section and three point A, B, C of equidistantly distributed on bar side circumferential boundary lines
Locate axial strain and any point (such as：A points) any γ angular direction in place drilling rod side strain, can be achieved cylindrical bar in compound load
The separation of lotus effect lower axle power, moment of flexure and moment of torsion.
2nd, the separation of threaded drillpipe mechanics parameter
General drilling tool is external thread structure, considers that screw rod is complicated, its mechanics parameter is accurately described it is difficult to provide
The analytic expression of distribution, therefore, the strain value at limited node is measured, the value of drilling tool axle power, moment of flexure and moment of torsion can not be directly given.
It is the product that cylindrical bar is superimposed with screw thread to consider threaded rod, on the basis of cylindrical bar mechanics parameter expression formula, is led to
The approximate analytic solution of axle power, moment of flexure and moment of torsion on external spiral drilling rod can be obtained by crossing amendment.
On cylindrical bar basis, 3 axial stresses of A, B, C need to introduce correction amount after considering screw thread, with former stress
σA、σB、σcSuperimposed, note three is respectively σ 'A、σ'B、σ'C, obtained by (7), (8) and (9) formula
Axle power, moment of torsion and the moment of flexure of threaded drillpipe be respectively
Wherein, correction amount depends on helicitic texture and material, also relevant with α, and threaded rod axial stress is sought by emulation
Difference between value and cylindrical bar axial stress theoretical value, can obtain Δ.Equally, the shear Stress Distribution of auger stem is imitated
Very, ratio k of the stress with the equidirectional shearing stress τ theoretical values of same size cylindrical bar with being in axially γ angular direction side is tried to achieve,
(10) formula is modified to
It can be seen that the measure same section of threaded drillpipe and axial strain at three point A, B, C of equidistantly distributed in bar side boundary line,
(15) and (16) are utilized to may separate out axle power and moment of flexure in combined load；With reference to any point (such as：A points) place drilling rod side is any
The strain of γ angular direction, (17) formula is utilized, may separate out moment of torsion.Corresponding to being assigned for hollow drilling tool, in (15) and (16) formula
Sectional area and the moment of inertia, assign in (17) formula corresponding to Torsion Section coefficient, the separation of same achievable combined load.Work as change
During drilling tool structure, the thought of above-mentioned load separation is equally applicable, and simply correction amount and k have difference.
(such as ANSYS) inputs screw thread pole length, external diameter, internal diameter, screw wing height, width in finite element emulation software
Degree, pitch, head number, screw thread rod model is established, input cylinder pole length, external diameter, internal diameter, establishes cylinder rod model, input material
(such as 45 steel), material characteristic parameter (including density, modulus of elasticity, Poisson's ratio, yield strength), load and the way of restraint (example
As bar both ends freely-supported is fixed, front end applies 20Nm moments of torsion and 600N axial forces), draw the stress of threaded rod and cylindrical bar identical point
As a result, then the two is made the difference to obtain the difference DELTA between threaded rod axial tension stress and cylindrical bar axial stress theoretical value.
Equally, screw thread pole length, external diameter, internal diameter, screw wing height, width, pitch, head number are inputted to finite element emulation software, established
Screw thread rod model, input cylinder pole length, external diameter, internal diameter establish cylinder rod model, and input material (such as 45 steel), material are special
Property parameter (including density, modulus of elasticity, Poisson's ratio, yield strength), load and the way of restraint (such as bar both ends freely-supported is fixed,
Front end applies 20Nm moments of torsion and 600N axial forces), the shear Stress Distribution to auger stem is drawn, tries to achieve threaded rod with being in axially γ
The shearing stress of angular direction side and the equidirectional shearing stress ratio k of same size cylindrical bar.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (3)
1. a kind of method of testing of drilling tool load pressure bending separation, it is characterised in that comprise the following steps：
(1) three point A, B and C that equidistantly distributed is taken on circumference are being handed over cylindrical bar cross section and the side of size with drilling tool,
Place strain transducer 1, strain transducer 2, strain transducer 3 respectively on point A, B and C, where A points side and with axial direction
A strain transducer 4 is placed in γ angular positions；
(2) respectively should using the axial direction at strain transducer 1, strain transducer 2, the corresponding measurement point of A, B, C tri- of strain transducer 3
Become, and be designated as ε respectivelyA、εB、εC, use side where the measurement A points of strain transducer 4 and the strain with being in axially γ angular direction
εγ；
(3) drilling tool length, external diameter, internal diameter, screw wing height, width, pitch, head number are inputted in finite element emulation software, is built
Vertical screw thread rod model, then input material, material characteristic parameter, load, the way of restraint, obtain drilling tool side any point and axially should
Power, input and drilling tool establish cylinder rod model, so with cylinder pole length, external diameter, the internal diameter of size in finite element emulation software
Input material, material characteristic parameter, load and the way of restraint afterwards, obtain on cylindrical bar side with drilling tool side any point position phase
With the axial stress put, and two axial stresses are made the difference to obtain the difference of drilling tool axial tension stress and cylindrical bar axial tension stress
Δ；
(4) drilling tool length, external diameter, internal diameter, screw wing height, width, pitch, head number are inputted to finite element emulation software, established
Screw thread rod model, then input material, material characteristic parameter, load, the way of restraint, draw the shear Stress Distribution of drilling tool, Xiang You
Xian Yuan simulation softwares are inputted with drilling tool with cylinder pole length, external diameter, the internal diameter of size, are established cylinder rod model, are then inputted material
Material, material characteristic parameter, load, the way of restraint, the shear Stress Distribution of cylindrical bar is obtained, and then obtain drilling tool with being in axially γ angles
The shearing stress ratio k of the sideways shearing stress in side, cylindrical bar with axial direction in γ angular direction side；
(5) the axle power F of drilling tool is calculatednFor
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Wherein, S is the cylindrical bar cross-sectional area with drilling tool with size, and E is the Young's modulus of elasticity of drilling tool material, and R is and brill
Have the cylindrical bar cross sectional radius with size, IzFor the moment of inertia with drilling tool with the cylindrical bar of size, sin (2 γ)=a, μ is brill
Have the Poisson's ratio of material, cos (2 γ)=b.
A kind of 2. method of testing of drilling tool load pressure bending separation according to claim 1, it is characterised in that：Described has
Xian Yuan simulation softwares are ANSYS.
A kind of 3. method of testing of drilling tool load pressure bending separation according to claim 1, it is characterised in that：Described material
Expect that characterisitic parameter includes density, modulus of elasticity, Poisson's ratio, yield strength.
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| CN106644566B (en) * | 2016-12-01 | 2019-04-09 | 北京卫星制造厂 | A kind of unmanned autonomically adaptive drilling method towards complicated lunar surface operating condition |
| CN109870259B (en) * | 2019-02-14 | 2021-02-09 | 五邑大学 | Device for measuring equivalent shear stress between shield spiral conveyor and modified muck |
| CN116659834B (en) * | 2023-05-24 | 2023-12-08 | 广东鼎泰高科技术股份有限公司 | Apparatus and method for evaluating drill performance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5044204A (en) * | 1990-07-09 | 1991-09-03 | Teledyne Industries, Inc. | Device with strain gaged threaded portion |
| CN1940514A (en) * | 2005-09-30 | 2007-04-04 | 比亚迪股份有限公司 | Force-measuring sensing method |
| JP5603550B2 (en) * | 2006-01-20 | 2014-10-08 | エクソンモービル アップストリーム リサーチ カンパニー | Method and system for evaluating screw connection group |
| US8453764B2 (en) * | 2010-02-01 | 2013-06-04 | Aps Technology, Inc. | System and method for monitoring and controlling underground drilling |
| CN102175357B (en) * | 2011-03-09 | 2013-03-27 | 上海交通大学 | Method for directly measuring bearing force based on structure micro-strain |
| CN102410011A (en) * | 2011-08-18 | 2012-04-11 | 上海大学 | Method for evaluating performance of drill pipe connector |
| CN102332047B (en) * | 2011-10-09 | 2013-05-22 | 西安交通大学 | Bolt finite element parametric modeling method capable of realizing hexahedron grid division |
| CN103954494B (en) * | 2014-05-12 | 2016-04-13 | 暨南大学 | A kind of canted coil spring mechanic property test method |
| CN104156498A (en) * | 2014-05-26 | 2014-11-19 | 北京宇航***工程研究所 | Finite element method and strength evaluation method for bolt |
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