CN116861584A - Overflow tool safety checking method based on Workbench simulation analysis - Google Patents
Overflow tool safety checking method based on Workbench simulation analysis Download PDFInfo
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- CN116861584A CN116861584A CN202310780043.5A CN202310780043A CN116861584A CN 116861584 A CN116861584 A CN 116861584A CN 202310780043 A CN202310780043 A CN 202310780043A CN 116861584 A CN116861584 A CN 116861584A
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- 238000004088 simulation Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004458 analytical method Methods 0.000 title claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 68
- 238000013461 design Methods 0.000 claims abstract description 37
- 238000004364 calculation method Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention belongs to the technical field of simulation, and provides a security check method of an overrun tool based on Workbench simulation analysis, which is technically characterized by comprising the following steps: determining that the tool use state is brand new or reused; establishing or optimizing a tooling entity model by using three-dimensional modeling software such as NX and the like; performing strength simulation calculation on the tool model by using Workbench software; checking whether the gasket and the locking plate meet the strength design requirement or not; checking whether other parts of the tool meet the strength design requirement; checking whether the axial support reaction force of the tool meets the test requirement. The invention provides a complete safety check method before the over-rotation tool test, and provides corresponding requirements or notes for a key process. The checking method is favorable for finding out weak points of the test design of the over-rotation tool and optimizing and improving the weak points, and avoids damage to test equipment or test parts caused by damage in the process of the tool test, so that the safety and reliability of the over-rotation tool in the test are improved, and the smooth completion of the over-rotation test is ensured.
Description
Technical Field
The invention belongs to the technical field of tool over-rotation safety check, and particularly relates to a method for checking the safety of an over-rotation tool based on Workbench simulation analysis, in particular to a method for performing simulation on the over-rotation tool before an experiment by utilizing Workbench software and optimizing and improving the over-rotation tool according to a simulation result.
Background
For most of the over-rotation speed tests, the test working conditions are severe, and the safety requirements on the test tools are relatively high. If the test tool has a design weak point, the tool in the test process can be damaged, so that the test equipment or the test piece is damaged. Therefore, the safety of the over-rotation tool needs to be checked before the over-rotation test.
At present, the national special checking method aiming at the security of the over-rotation tool has less research, lacks a complete and strict checking flow, has no chapter and can circulate from simulation modeling and grid division to load application, and has no compliance with the checking standard.
Disclosure of Invention
The invention solves the technical problems that: the invention aims to solve the problem of providing a Workbench software-based security check method for an overrun tool, which simulates the strength and other characteristics of the overrun tool by using a numerical simulation method, finds out a design weak point and provides guarantee for the security development of overrun tests. In order to solve the technical problem, the technical scheme provided by the invention is as follows:
a security check method of an overrun tool based on Workbench simulation analysis comprises the following steps:
1) Determining the state of the overrun tool: a brand new overrun tool or a reused overrun tool;
2) For the brand new tool in the step 1), building an overrun tool entity model by using three-dimensional modeling software;
3) Performing intensity simulation calculation on the over-rotation tool entity model in the step 2) by using Workbench software;
4) Checking whether the gasket and the locking plate in the over-rotation tool meet the strength design requirement according to the simulation calculation result of the step 3);
if the strength of the steel plate cannot be met, discarding the gasket and the locking plate, and performing strength simulation calculation by using Workbench software to execute the step 5);
if the strength of the gasket and the locking plate cannot be met, the gasket and the locking plate can be replaced, and the steps 3) to 4) are repeated until the replaced gasket and the replaced locking plate meet the strength design requirement;
5) Checking whether other parts except the gasket and the locking plate in the over-rotation tool meet the strength design requirement according to the simulation calculation result of the step 3);
if the strength design requirements cannot be met, optimizing the physical model of the overrunning tool, and repeating the steps 3) to 5) until other parts except the gasket and the locking plate in the overrunning tool meet the strength design requirements;
6) Checking whether the axial support reaction force of the over-rotation tool meets the test requirement according to the simulation calculation result of the step 3;
if the axial support reaction force cannot be met, increasing the axial pre-tightening force of the tool, and repeating the steps 3) to 6) until the axial support reaction force of the over-rotation tool meets the test requirement;
finally, the overrun tool which meets the test requirement in theory is obtained.
Furthermore, the step 1) determines the state of the over-rotation tool, and for the repeated use of the over-rotation tool, the strength check is completed when the over-rotation tool is used for the first time, and the test only needs to carry out flaw detection, so that the condition that the over-rotation tool has no crack defect in the use process is ensured.
Further, the step 2) establishes an overrunning tool entity model to ensure that the assembly of each part of the overrunning tool and the assembly of the overrunning tool and the test piece meet the test drawing and technical requirements.
Furthermore, the step 3) is performed with the simulation calculation of the physical model strength of the overrun tool, and the nut and the bolt or the nut and the connecting shaft are in binding contact, and the interference fit of the fit surface is provided with the radius interference, and other contacts are all standard contacts.
Furthermore, the step 3) of performing over-rotation tool model strength simulation calculation, and performing grid refinement on a stress concentration area, wherein the stress concentration area at least comprises a bolt, a bolt hole, a pin and a pin hole.
Furthermore, the step 3) of performing simulation calculation on the strength of the over-rotation tool model, wherein the load to be considered comprises a pre-tightening load, an interference load and a centrifugal force load, the interference load is preloaded, then the other two loads are loaded according to the two load steps, the pre-tightening load is applied in the first step, and the pre-tightening load is locked and the centrifugal force load is applied in the second step, so that the accurate extraction of the axial support reaction force of the over-rotation tool is ensured.
Further, the step 4) checks whether the gasket and the locking plate meet the strength design requirement, and the checking standard of the gasket and the locking plate requires that the equivalent stress of the gasket or the locking plate is lower than the yield limit of the material of the gasket and the locking plate.
Further, step 5) checks whether other parts of the over-rotation tool meet the strength design requirement, and the checking standard requires that the equivalent stress of other parts is lower than the yield limit of the material.
Further, step 6) checks whether the axial support reaction force of the over-rotation tool meets the test requirement, and the axial support reaction force of the over-rotation tool in the test process of the check standard requirement is more than or equal to 2000N.
The invention has the beneficial effects that: by adopting the security checking technology of the overrun tool in the process, a structural simulation model consistent with an engineering experiment is established, and the assembly and the test of the overrun tool are respectively simulated by adopting a step-by-step loading mode, so that the structural stress and the axial support reaction force of the overrun tool in the assembly and test process are obtained, the design weak point of the overrun tool is intuitively reflected, and the design weak point is optimized and improved, so that the damage of test equipment or test pieces caused by the tool damage in the test process is effectively avoided.
Drawings
Fig. 1 is a schematic flow chart of an overspin tool security check method based on Workbench simulation analysis provided by the embodiment of the invention;
fig. 2 is a schematic diagram of an overrunning tool and an impeller geometric model according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings, but the scope of the invention is not limited by the embodiments:
example 1
The Workbench software is widely used structure analysis software at present, and physical models of the Workbench are confirmed by engineering, so that the stress, deformation and vibration problems of structural components can be accurately simulated.
The embodiment of the invention provides a security checking method for an overrun tool based on Workbench software, and necessary optimization and improvement are carried out on the overrun tool according to a checking result so as to ensure that overrun tests are carried out smoothly.
As shown in fig. 1, the method specifically includes:
1) Determining the state of the tool, and for the repeated use of the tool, detecting the tool by flaw detection (magnetic powder or fluorescence) without problems, and then using the tool for an overrun test; for a brand new tool, tool drawings and test parameters are required to be prepared.
2) And (3) establishing or optimizing a tooling entity model according to the tooling drawing in the step (1), and assembling all parts of the tooling, the tooling and the test piece together according to the test technical conditions.
3) Importing the tooling entity model in the step 2) into Workbench software, defining the parts materials, setting contact parameters, dividing grids, applying test load, and performing strength simulation calculation.
4) Checking whether the gasket and the locking plate meet the strength design requirement according to the strength simulation result data of the step 3), and when the gasket and the locking plate can not meet the strength design requirement, suggesting to discard the gasket and the locking plate or replace the gasket and the locking plate, and repeating the steps 3) to 4); when the gasket and the locking plate can meet the strength design requirement, the strength of other parts of the tool is checked.
5) Checking whether other parts of the tool meet the strength design requirement according to the strength simulation result data of the step 3), and when the other parts cannot meet the strength design requirement, optimizing the relevant tool parts, and repeating the steps 2) to 5); when other parts can meet the strength design requirement, checking whether the axial support reaction force of the tool meets the test requirement.
6) Checking whether the axial support reaction force of the tool meets the test requirement according to the strength simulation result data of the step 3), and increasing the axial pretightening force of the tool when the axial support reaction force of the tool cannot meet the test requirement, and repeating the steps 3) to 6); and when the axial support reaction force of the tool can meet the test requirement, finishing the security check of the key item of the over-rotation tool.
In the step 1), for the reusable tool, since the strength check is completed when the reusable tool is used for the first time, it is necessary to ensure that flaw detection (magnetic powder or fluorescence) has no crack defect before the experiment. For a brand new tool, a tool structure diagram, an assembly clearance or interference requirement, an assembly mode, a load of the assembly mode, a rotating speed load and the like are required to be prepared.
In the step 2), a tooling entity model is established, and the tooling parts which do not meet the strength requirement are subjected to subsequent checking and optimization improvement. Interference fit is adopted in the model, interference (magnitude) load is reflected in subsequent simulation contact setting.
In the step 2), only the polished rod part is limited in bolt strength check, the screw thread check refers to a related theoretical calculation formula, and the screw thread feature in the model is replaced by a cylindrical surface.
In the step 2), the weight block components may be omitted.
In step 2), a preload surface is created in advance on the bolt shank or the connecting shaft by means of surface cutting or the like.
In the step 3), the density ρ, the elastic modulus E and the Poisson's ratio μ are input into the part material parameters, the strength of the corresponding material is calculated, and the yield limit of the material is further obtained.
In step 3), when the contact of the parts is set, the nut (female) and the bolt (connecting shaft) are set to be binding contacts (bound), and other contacts are generally set to be standard friction contacts (friction).
For interference fits, the mating surface contact sets a radius interference (Offset).
In the step 3), the grids of the test piece are roughly divided, the grids of the tool are finely divided, and finer grid division is adopted for the bolts, the bolt holes, the pins, the pin holes and some chamfer areas with concentrated stress.
In the step 3), two load steps are adopted for loading the rotating speed and the pretightening force load, wherein the pretightening force load is applied to the first load step, the pretightening force load is locked to the second load step, and the rotating speed load is applied at the same time. The pre-tightening force is applied to the pre-tightening force loading surface created in the step 2), and the pre-tightening force calculation formula is as follows:
F＝M/(K×d)
m-tightening moment
F-axial pretension
k-tightening moment coefficient, refer to the table below.
d-nominal diameter (i.e. thread major diameter)
Tightening torque coefficient meter
In the step 3), in order to extract the axial support force of the tool, the nodes Forces in Output Controls need to be activated during Output setting.
In the step 4), when checking the gasket and the locking plate, extracting the equivalent stress value of the first load step, and requiring the stress value to be lower than the yield limit of the material. When the gasket and the locking plate can not meet the strength design requirement, the gasket and the locking plate are not recommended or replaced, the steps 3) to 4) are repeated, and the simulation calculation is performed again.
In the step 5), when other tooling parts are checked, larger equivalent stress values in the two load steps are extracted. The stress value is required to be below the yield limit of the material. When other parts cannot meet the strength design requirement, related tool parts are required to be improved, the steps 2) to 5) are repeated, and simulation calculation is performed again.
Specifically, the method for improving the relevant tooling parts comprises the following steps: parts using other materials, or increasing the strength of parts, etc.
In the step 6), the second load step counter force of a plurality of axial matching surfaces is extracted, and the minimum value is selected, so that the counter force is required to be larger than 2000N. And when the axial support reaction force of the tool does not meet the test requirement, increasing the axial pretightening force of the tool, repeating the steps 3) to 6), and carrying out simulation calculation again.
Example 2
1) And determining the state of the tool.
For the reusable tool, the tool can be used for an overrun test after flaw detection (magnetic powder or fluorescence) has no problem;
for a brand new tool, preparing tool drawings and test parameters;
2) Establishing or optimizing a tooling entity model according to the tooling drawing output in the step 1), and assembling all parts of the tooling and the tooling with a test piece according to test technical conditions, wherein the figure 2 is shown;
3) Importing the three-dimensional structure model of the over-rotation test output in the step 2) into Workbench software, defining the materials of parts, setting contact parameters, dividing grids, applying test load and carrying out simulation calculation;
4) Checking whether the gasket and the locking plate meet the strength design requirement according to the simulation result data output by the step 3), and when the gasket and the locking plate can not meet the strength design requirement, suggesting to discard the gasket and the locking plate or replace the gasket and the locking plate, and repeating the steps 3) to 4); when the gasket and the locking plate can meet the strength design requirement, checking the strength of other parts of the tool;
5) Checking whether other parts of the tool meet the strength design requirement according to the simulation result data output in the step 3), and when the other parts cannot meet the strength design requirement, optimizing relevant tool parts, and repeating the steps 2) to 5); when other parts can meet the strength design requirement, checking whether the axial support reaction force of the tool meets the test requirement;
6) Checking whether the axial support reaction force of the tool meets the test requirement according to the simulation result data output in the step 3), and increasing the axial pretightening force of the tool when the axial support reaction force of the tool cannot meet the test requirement, and repeating the steps 3) to 6); and when the axial support reaction force of the tool can meet the test requirement, the safety simulation check of the key item of the over-rotation tool is completed, and the over-rotation test can be carried out after flaw detection.
The invention has the beneficial effects that: by adopting the security checking technology of the overrun tool in the process, a structural simulation model consistent with an engineering experiment is established, and the assembly and the test of the overrun tool are respectively simulated by adopting a step-by-step loading mode, so that the structural stress and the axial support reaction force of the overrun tool in the assembly and test process are obtained, the design weak point of the overrun tool is intuitively reflected, and the design weak point is optimized and improved, so that the damage of test equipment or test pieces caused by the tool damage in the test process is effectively avoided.
The technical scheme has proved by a large number of engineering overrun tests, has feasible technology and reliable result, and can effectively solve the safety problem in the overrun tool test process.
Claims (9)
1. The method for checking the security of the over-rotation tool based on the Workbench simulation analysis is characterized by comprising the following steps of:
1) Determining the state of the overrun tool: a brand new overrun tool or a reused overrun tool;
2) For the brand new tool in the step 1), building an overrun tool entity model by using three-dimensional modeling software;
3) Performing intensity simulation calculation on the over-rotation tool entity model in the step 2) by using Workbench software;
4) Checking whether the gasket and the locking plate in the over-rotation tool meet the strength design requirement according to the simulation calculation result of the step 3);
if the strength of the steel plate cannot be met, discarding the gasket and the locking plate, and performing strength simulation calculation by using Workbench software to execute the step 5);
if the strength of the gasket and the locking plate cannot be met, the gasket and the locking plate can be replaced, and the steps 3) to 4) are repeated until the replaced gasket and the replaced locking plate meet the strength design requirement;
5) Checking whether other parts except the gasket and the locking plate in the over-rotation tool meet the strength design requirement according to the simulation calculation result of the step 3);
if the strength design requirements cannot be met, optimizing the physical model of the overrunning tool, and repeating the steps 3) to 5) until other parts except the gasket and the locking plate in the overrunning tool meet the strength design requirements;
6) Checking whether the axial support reaction force of the over-rotation tool meets the test requirement according to the simulation calculation result of the step 3);
if the axial support reaction force cannot be met, increasing the axial pre-tightening force of the tool, and repeating the steps 3) to 6) until the axial support reaction force of the over-rotation tool meets the test requirement;
finally, the overrun tool which meets the test requirement in theory is obtained.
2. The security check method for the over-rotation tool based on the Workbench simulation analysis according to claim 1, wherein the step 1) is to determine the state of the over-rotation tool, and for the repeated use of the over-rotation tool, the strength check is completed when the over-rotation tool is used for the first time, and the test only needs to perform flaw detection to ensure that the over-rotation tool has no crack defect in the use process.
3. The security check method for the over-rotation tool based on the Workbench simulation analysis according to claim 1, wherein the step 2) establishes an over-rotation tool solid model to ensure that the assembly of each part of the over-rotation tool and the assembly of the over-rotation tool and a test piece meet the test drawing and technical requirements.
4. The security checking method of the over-rotation tool based on the Workbench simulation analysis, according to claim 1, is characterized in that the strength simulation calculation of the over-rotation tool solid model in the step 3) is performed, the nut and the bolt or the nut and the connecting shaft are in binding contact, the radius interference is set for the interference fit of the contact surface, and the other contacts are all standard contacts.
5. The method for checking the safety of the over-rotation tool based on the Workbench simulation analysis according to claim 1, wherein the step 3) is characterized in that the intensity simulation calculation of the over-rotation tool model is performed, and grid refinement is performed on a stress concentration area, wherein the stress concentration area at least comprises areas where bolts, bolt holes, pins and pin holes are located.
6. The method for checking the safety of the over-rotation tool based on the Workbench simulation analysis is characterized in that the step 3) of performing the simulation calculation on the intensity of the over-rotation tool model comprises the steps of pre-tightening load, interference load and centrifugal force load, pre-loading the interference load, and loading the other two loads according to the two loads, wherein the pre-tightening load is applied in the first step, the pre-tightening load is locked in the second step, and the centrifugal force load is applied, so that the accurate extraction of the axial support reaction force of the over-rotation tool is ensured.
7. The method for checking the safety of the over-rotation tool based on the Workbench simulation analysis according to claim 1, wherein the step 4) is characterized in that whether the gasket and the locking plate meet the strength design requirement is checked, and the checking standard of the gasket and the locking plate requires that the equivalent stress of the gasket or the locking plate is lower than the yield limit of the material of the gasket and the locking plate.
8. The method for checking the safety of the over-rotation tool based on the Workbench simulation analysis according to claim 1, wherein the step 5) is to check whether other parts of the over-rotation tool meet the strength design requirement, and the checking standard requires that the equivalent stress of the other parts is lower than the yield limit of the material of the other parts.
9. The security check method for the overrun tool based on the Workbench simulation analysis according to claim 1, wherein the step 6) is characterized in that whether the axial support reaction force of the overrun tool meets the test requirement or not is checked, and the axial support reaction force of the overrun tool in the test process of the check standard requirement is more than or equal to 2000N.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117494353A (en) * | 2024-01-02 | 2024-02-02 | 航天精工股份有限公司 | Design checking integration-based forward design method for fastening connection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117494353A (en) * | 2024-01-02 | 2024-02-02 | 航天精工股份有限公司 | Design checking integration-based forward design method for fastening connection |
| CN117494353B (en) * | 2024-01-02 | 2024-03-26 | 航天精工股份有限公司 | Design checking integration-based forward design method for fastening connection |
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