CN109540380B - A method of it correcting single bolt torque angle method and tightens error - Google Patents
A method of it correcting single bolt torque angle method and tightens error Download PDFInfo
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- CN109540380B CN109540380B CN201811496283.8A CN201811496283A CN109540380B CN 109540380 B CN109540380 B CN 109540380B CN 201811496283 A CN201811496283 A CN 201811496283A CN 109540380 B CN109540380 B CN 109540380B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
- G01L25/003—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring torque
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Abstract
The invention discloses a kind of methods corrected single bolt torque angle method and tighten error, it is characterised in that has following steps: S1, establishing torque axis horn cupping correction angle formula:AndS2, bolt stiffness K is calculated1；S3, testing stand global stiffness K is establishedAlwaysWith connected piece stiffness K2Relational expression；S4, single bolt tighten emulation and solve KAlways；S5, connected piece stiffness K is calculated2；S6, the relative deformation Δ L that bolt and connected piece are calculated according to formula (2) calculate correction angle Δ θ according to formula (1).The present invention fully considers influence of the torque axis horn cupping corner to pretightning force and assembly performance, propose a kind of method corrected single bolt torque angle method and tighten error, the present invention is by being modified corner, to guarantee that bolt pretightening reaches reasonable value, to reduce pretightning force dispersibility.
Description
Technical field
The present invention relates to bolts to tighten field, specifically a kind of side corrected single bolt torque angle method and tighten error
Method.
Background technique
In recent years, China pays much attention to assembly tightening technology, but lacks the mechanism tightened to bolt due to domestic
Research, generally existing bolt tightens that assembly precision is not high, and working efficiency is low on the screw coupling member of important assembling link, warp
Often result in the problems such as assembling quality is unstable, assembling assembly dynamic stiffness dispersibility is big, structure durability is poor.It is crucial for assembly
Connecting portion special construction conducts a research to the Evolution Mechanism of pretightning force and the influence of assembly precision, can not only verify elder generation in advance
Into the reasonability of tightening technique, the application for automatic technology in post-digital Intelligent assembly line lays the foundation, while being also
Fastener establishes standard in manufacturing field and lays a good foundation.
Currently, assembly Bolt Screw Down Method is mainly calibrated wrench method and torque axis horn cupping, and the precision of torque axis horn cupping is better than
Calibrated wrench method, therefore torque axis horn cupping is mostly used in practical set.Torque axis horn cupping measurement parameter has input torque, bolt in test
Pretightning force and corner.Bolt pretightening is measured by turning round pull sensor, due to connected piece and sensing in measurement process
There are gaps to lead to experimental bench Stiffness for device, increases so as to cause the relative displacement between bolt and connected piece, and nut turns
Angle increases, and the test corner finally obtained is bigger than normal than actual rotational angle.If corner is excessive to be will cause in practical set rundown process
Pretightning force control is uneven, will lead to the bolt strained unevenness of connection, and individual bolts that connect are more than design load, cause to connect bolt
Group integral strength decline, assembling structure Joint failure；As it can be seen that bolt applies appropriate pretightning force, to the normal of guarantee assembly
Trouble free service has a very important significance.
Summary of the invention
It is single to propose a kind of amendment for the corner problems of too occurred in bolt torque angle method rundown process by the present invention
The method that bolt torque angle method tightens error can make pretightning force control of the bolt in rundown process in the reasonable scope,
To reduce the dispersibility of assembly pretightening power.The technological means that the present invention uses is as follows:
A method of it correcting single bolt torque angle method and tightens error, it is characterised in that there are following steps:
S1, torque axis horn cupping correction angle formula is established:
Wherein Δ L is the relative deformation of bolt and connected piece, and P is lead, θIt surveysTo survey corner, Δ θ is correction angle, and
Wherein Δ F is the difference of pretightning force target and torque axis horn cupping starting torque pretightning force, K1For bolt rigidity, K2For quilt
Connector rigidity；
S2, bolt stiffness K is calculated1；
S3, testing stand global stiffness K is establishedAlwaysWith connected piece stiffness K2Relational expression；
S4, single bolt tighten emulation and solve KAlways；
S5, connected piece stiffness K is calculated2；
S6, the relative deformation Δ L that bolt and connected piece are calculated according to formula (2) calculate correction angle Δ according to formula (1)
θ。
Specific step is as follows by the step S2:
Bolt stiffness K is calculated according to bolt actual size1, as shown in formula (3):
Wherein E1For the elasticity modulus of bolt, LiFor bolt piecemeal length, AiFor bolt piecemeal sectional area；
Specific step is as follows by the step S3:
Emulate pretightning force and angle relation slope of a curve KIt is imitativeMeet following formula:
Wherein F1For pretightning force, θ is emulation corner；
Testing stand global stiffness KAlwaysMeet following formula:
Wherein δ experimental bench deflection；
θ and δ meet following formula:
It obtains:
And then obtain testing stand global stiffness KAlwaysWith connected piece stiffness K2Relational expression:
Specific step is as follows by the step S4:
Emulation is tightened by the mono- bolt of Ansys, certain input torque is set, the parameters such as coefficient of friction obtain emulation and pre-tighten
Power and angle relation curve calculate its slope and obtain KIt is imitative, and then obtain KAlways。
Specific step is as follows by the step S5:
The K that will be obtainedAlwaysIt substitutes into formula (8) and obtains K2。
Beneficial effects of the present invention:
The present invention fully considers influence of the torque axis horn cupping corner to pretightning force and assembly performance, proposes a kind of amendment
The method that single bolt torque angle method tightens error, the present invention is by being modified corner, to guarantee that bolt pretightening reaches
Reasonable value, to reduce pretightning force dispersibility.
The present invention can be widely popularized in the bolt field of tightening for the above-mentioned reasons.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that the preload of bolt simulation model in a specific embodiment of the invention is tried hard to.
Fig. 2 is the load diagram of bolt simulation model in a specific embodiment of the invention.
Fig. 3 is that pretightning force and angle relation figure are emulated in a specific embodiment of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
A method of it correcting single bolt torque angle method and tightens error, it is characterised in that there are following steps:
S1, torque axis horn cupping correction angle formula is established:
Wherein Δ L is the relative deformation of bolt and connected piece, and P is lead, θIt surveysTo survey corner, Δ θ is correction angle, and
Wherein Δ F is the difference of pretightning force target and torque axis horn cupping starting torque pretightning force, K1For bolt rigidity, K2For quilt
Connector rigidity；
S2, bolt stiffness K is calculated1:
Bolt stiffness K is calculated according to bolt actual size1, as shown in formula (3):
Wherein E1For the elasticity modulus of bolt, LiFor bolt piecemeal length, AiFor bolt piecemeal sectional area；
The present embodiment is carried out for M10 bolt, obtains K1=2.50905 × 108N/m；
S3, testing stand global stiffness K is establishedAlwaysWith connected piece stiffness K2Relational expression:
Emulate pretightning force and angle relation slope of a curve KIt is imitativeMeet following formula:
Wherein F1For pretightning force, θ is emulation corner；
Testing stand global stiffness KAlwaysMeet following formula:
Wherein δ experimental bench deflection；
θ and δ meet following formula:
It obtains:
And then obtain testing stand global stiffness KAlwaysWith connected piece stiffness K2Relational expression:
S4, single bolt tighten emulation and solve KAlways:
As depicted in figs. 1 and 2, emulation is tightened by the mono- bolt of Ansys, certain input torque, coefficient of friction etc. is set
Parameter obtains emulation pretightning force and angle relation curve, as shown in figure 3, calculating its slope obtains KIt is imitative, and then obtain KAlways=1.88
×108N/m；
S5, connected piece stiffness K is calculated2:
The K that will be obtainedAlwaysIt substitutes into formula (8) and obtains K2=7.50 × 108N/m；
S6, relative deformation Δ L=6.16 × 10 that bolt and connected piece are calculated according to formula (2)-5M, according to formula (1)
Calculate correction angle Δ θ=29.25 °.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (1)
1. a kind of method corrected single bolt torque angle method and tighten error, it is characterised in that have following steps:
S1, torque axis horn cupping correction angle formula is established:
Wherein Δ L is the relative deformation of bolt and connected piece, and P is lead, θIt surveysTo survey corner, Δ θ is correction angle, and
Wherein Δ F is the difference of pretightning force target and torque axis horn cupping starting torque pretightning force, K1For bolt rigidity, K2It is connected
Part rigidity；
S2, bolt stiffness K is calculated1:
Bolt stiffness K is calculated according to bolt actual size1, as shown in formula (3):
Wherein E1For the elasticity modulus of bolt, LiFor bolt piecemeal length, AiFor bolt piecemeal sectional area；
S3, testing stand global stiffness K is establishedAlwaysWith connected piece stiffness K2Relational expression:
Emulate pretightning force and angle relation slope of a curve KIt is imitativeMeet following formula:
Wherein F1For pretightning force, θ is emulation corner；
Testing stand global stiffness KAlwaysMeet following formula:
Wherein δ experimental bench deflection；
θ and δ meet following formula:
It obtains:
And then obtain testing stand global stiffness KAlwaysWith connected piece stiffness K2Relational expression:
S4, single bolt tighten emulation and solve KAlways:
Tighten emulation by the mono- bolt of Ansys, certain input torque be set, the parameters such as coefficient of friction obtain emulation pretightning force and
Angle relation curve calculates its slope and obtains KIt is imitative, and then obtain KAlways；
S5, connected piece stiffness K is calculated2:
The K that will be obtainedAlwaysIt substitutes into formula (8) and obtains K2；
S6, the relative deformation Δ L that bolt and connected piece are calculated according to formula (2) calculate correction angle Δ θ according to formula (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496283.8A CN109540380B (en) | 2018-12-07 | 2018-12-07 | A method of it correcting single bolt torque angle method and tightens error |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496283.8A CN109540380B (en) | 2018-12-07 | 2018-12-07 | A method of it correcting single bolt torque angle method and tightens error |
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| Publication Number | Publication Date |
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| CN109540380A CN109540380A (en) | 2019-03-29 |
| CN109540380B true CN109540380B (en) | 2019-11-26 |
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| CN110349469A (en) * | 2019-07-21 | 2019-10-18 | 李力 | A kind of boss bolt pretightning force controlled training system of HWIL simulation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106126765A (en) * | 2016-03-15 | 2016-11-16 | 重庆长安汽车股份有限公司 | A kind of Forecasting Methodology of the discrete pretightning force of bolt angle method |
| CN107341280A (en) * | 2016-11-25 | 2017-11-10 | 安徽江淮汽车集团股份有限公司 | A kind of computational methods of bolt angle method tightening technique |
| CN107621361A (en) * | 2017-08-02 | 2018-01-23 | 大连理工大学 | A kind of closed loop control method that testing machine is released based on accurate control bolt transverse load |
| CN108919151A (en) * | 2018-04-03 | 2018-11-30 | 西安空间无线电技术研究所 | A kind of microwave radiometer cross polarization error correcting method |
-
2018
- 2018-12-07 CN CN201811496283.8A patent/CN109540380B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106126765A (en) * | 2016-03-15 | 2016-11-16 | 重庆长安汽车股份有限公司 | A kind of Forecasting Methodology of the discrete pretightning force of bolt angle method |
| CN107341280A (en) * | 2016-11-25 | 2017-11-10 | 安徽江淮汽车集团股份有限公司 | A kind of computational methods of bolt angle method tightening technique |
| CN107621361A (en) * | 2017-08-02 | 2018-01-23 | 大连理工大学 | A kind of closed loop control method that testing machine is released based on accurate control bolt transverse load |
| CN108919151A (en) * | 2018-04-03 | 2018-11-30 | 西安空间无线电技术研究所 | A kind of microwave radiometer cross polarization error correcting method |
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