scholarly journals Finite-element Analysis and Optimization for the Column of Numerically Controlled Triaxial Deep Hole Drilling Machine

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Dezhong Kong ◽  
Jingfeng Shen ◽  
Baohui Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hole Drilling ◽  
Drilling Machine ◽  
Deep Hole ◽  
Element Analysis ◽  
Deep Hole Drilling

scholarly journals Closed-form solutions of hole distortion for use in deep-hole drilling measurements of residual stress in orthotropic plates

2016 ◽  
Vol 52 (2) ◽  
pp. 77-82 ◽  
Author(s):  
Carlos Garza ◽  
Anton Shterenlikht ◽  
Martyn J Pavier ◽  
David J Smith
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Closed Form ◽  
Hole Drilling ◽  
Shear Stresses ◽  
Deep Hole ◽  
Element Analysis ◽  
Deep Hole Drilling ◽  
Closed Form Solutions

The measurement of residual stress using the deep-hole drilling method relies on the evaluation of the distortion of a hole in a plate under the action of far-field direct and shear stresses. While closed-form solutions exist for the isotropic materials, in previous work for orthotropic materials, finite element analysis has been used to find the distortion. In this technical note, Lekhnitskii’s analysis is used to find closed-form solutions for the distortion of a circular hole in an orthotropic plate. The results are compared with those of finite element analysis for a range of material properties with excellent agreement.

scholarly journals FINITE ELEMENT ANALYSIS OF TOOLS FOR DEEP DRILLING TECHNOLOGY

2021 ◽  
Author(s):  
Natal'ya Turkina ◽  
Aleksandr Chukarin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Software Package ◽  
Hole Drilling ◽  
Deep Hole ◽  
Ansys Software ◽  
Deep Drilling ◽  
Element Analysis ◽  
Drilling Technology ◽  
Modern Tool

Using the ANSYS software package, the issues of strength of the drill head and temperature distribution were considered, the design of a modern tool for deep hole drilling was analyzed, and modal analysis was carried out to exclude possible resonance phenomena.

Deep Hole Drill Residual Stress Measurement Technique Experimental Validation

2006 ◽  
Vol 524-525 ◽  
pp. 549-554 ◽  
Author(s):  
W.R. Mabe ◽  
W.J. Koller ◽  
A.M. Holloway ◽  
P.R. Stukenborg
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Test Specimen ◽  
Experimental Validation ◽  
Stress Measurement ◽  
Reference Solution ◽  
Deep Hole ◽  
Element Analysis ◽  
Validation Test

This paper presents the results of an experimental validation of the deep hole drill residual stress measurement method. A validation test specimen was fabricated and plastically loaded to impose a permanent residual stress field within the specimen. The validation test specimen was designed to provide a variety of stress profiles as a function of location within the specimen. A finite element analysis of the validation test specimen was performed in order to provide a reference solution for comparison to the deep hole drill experimental results. Results from experimental testing of the validation test specimen agree well with the finite element analysis reference solution, thereby providing further validation of the deep hole drill method to measure residual stresses.

Finite element analysis of calibration factors for the modified incremental strain method

2003 ◽  
Vol 38 (1) ◽  
pp. 45-51 ◽  
Author(s):  
B-W Hwang ◽  
C-M Suh ◽  
S-H Kim
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Boundary Conditions ◽  
Reference Model ◽  
Strain Relaxation ◽  
Hole Drilling ◽  
Element Analysis ◽  
Bending Load ◽  
Incremental Strain ◽  
Strain Method

To modify the incremental strain method used to evaluate non-uniform residual stress, a finite element analysis (FEA) of the reference model used to describe a hole-drilling test was conducted. The calibration factors for the x and y directions were obtained from the analysis and then their differences were compared under various loading conditions. A hole-drilling test using a steel plate as the reference specimen was introduced, and under the pure bending load, strain relaxation was measured at each hole-drilling step to determine the calibration factors. Although the calibration factors in the x and y directions varied with the boundary conditions used in the FEA, their differences were reduced to zero for all depths when the prescribed loads as the boundary conditions in the x and y directions became the same. In addition, it was analytically and experimentally confirmed that the calibration factors did not vary with the direction. Accordingly, by making the calibration factors equal in the x and y directions in the modified equation for the incremental strain method, no singularity is produced in the stress calculations.

Analysis and Optimization of the Deep-Hole Drilling Technique in Measuring Complex Residual Stress

2017 ◽  
Author(s):  
Gang Zheng ◽  
Sayeed Hossain ◽  
Feng Shen ◽  
Chris Truman
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Longitudinal Axis ◽  
Hole Drilling ◽  
Internal Diameter ◽  
Deep Hole ◽  
Element Analysis ◽  
Deep Hole Drilling ◽  
Drilling Technique ◽  
Technique Comparison

The aim of the present study was to utilize a complex residual stress generated within a welded circular disc to further investigate the standard deep-hole drilling (DHD) technique and the newly developed over-coring deep-hole drilling (oDHD) technique in accurately measuring residual stresses well over yield stress. Finite Element Analysis (FEA) was used to optimize and extend the deep-hole drilling technique and improve its accuracy. The standard DHD procedure involves 4 steps. (1) A reference hole is gun-drilled through the component. (2) The internal diameter of the reference hole is measured at different angular positions through the depth of the component. (3) A cylindrical section with the reference hole as its longitudinal axis is trepanned free from the component. (4) Finally, the relaxed internal diameter is re-measured at the same angular positions and the same depths. The drilling, trepanning procedures and the parameters of the deep-hole drilling technique were all studied in detail to optimize the technique. Comparison is made between the FEA predicted residual stress in the weld, the measurements and the reconstructed residual stresses of the measurements. The close correlations confirmed the suitability of new modifications made in the deep-hole drilling technique to account for plasticity when measuring near yield residual stresses present in a component.

Structural Optimization of Drilling Bed for Deep Hole Drilling Machine

2014 ◽  
Vol 599-601 ◽  
pp. 473-477 ◽  
Author(s):  
Yin Sai Guo ◽  
Yi Zhang ◽  
Ming Ke Cheng
Keyword(s):  
Structural Parameters ◽  
Dynamic Stiffness ◽  
Plate Thickness ◽  
Hole Drilling ◽  
Drilling Machine ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Object A ◽  
Design Variables ◽  
The Cost

Taking the drilling bed of Z8016 deep hole drilling machine as the research object, a modal analysis of drilling bed structure is performed by ANSYS software. Assuming that the low-order natural frequencies basically remain unchanged, the structure of the drilling bed is analyzed and modified so as to decrease its weight. The bed structure is selected based on ANSYS, that is to say, the structural parameters of the drilling bed are optimized in the condition of fundamental frequency constraints, which takes wall thickness, ribbed plate thickness and the diameter of ribbed plate holes of the drilling bed as design variables. Compared with the original one, the optimal drilling bed has better dynamic stiffness, reduces material consumption, lowers the cost of the drilling bed and achieves the optimal goal.

The Structure Improvement Design of Turbodrill Diversion Liner

2012 ◽  
Vol 472-475 ◽  
pp. 688-691
Author(s):  
Xin Mei Yuan ◽  
Si Zhu Zhou ◽  
Tian Cheng Huang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Drilling Fluid ◽  
Equivalent Stress ◽  
Hole Drilling ◽  
Original Structure ◽  
Element Analysis ◽  
Safety Coefficient ◽  
Fillet Radius ◽  
Maximum Equivalent Stress

In order to improve the work life and reliability of turbodrill diversion liner, the parametric finite element model for turbodrill diversion liner is established by using finite element analysis software, and the result of finite element analysis is shown that the maximum equivalent stress is bigger and the work safety coefficient is low. On the basis of the result of finite element analysis and the characteristics of diversion liner, the improvement scheme is put forward and the finite element analysis is carried out. The analysis result shows that the fillet radius of diversion hole drilling fluid inlet has an importance impact on the maximum equivalent stress. When the fillet radius is 9 millimeter, the maximum equivalent stress is least, the maximum equivalent stress is reduced by 34.82% compared with the original structure, and the safety coefficient reached 1.772, and the results meet the design requirement.

Simulation Study on Deep Hole Drilling Machine Hydraulic System Based on System Schematic Diagram

2010 ◽  
Vol 136 ◽  
pp. 144-147
Author(s):  
He Cao ◽  
Wei Hua Wu
Keyword(s):  
Hydraulic System ◽  
Simulation Method ◽  
Simulation Software ◽  
Hole Drilling ◽  
Schematic Diagram ◽  
Drilling Machine ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Modeling Process ◽  
Hydraulic System Design

Aiming at the issues of cumbersome modeling process and complicated programs, the hydraulic system simulation software automation studio is introduced, which is based on system schematic diagram. Taking the hydraulic system of deep hole drilling machine for example, by using automation studio, the motor’s input pressure and flow are simulated and studied, and this system is debugged on bosch rexroth experiment table, the parameter test results are basically the same with their simulation results. This simulation method can accurately simulate the system’s working state, simplify the process of modeling and parameter adjustment, and provide a good way for hydraulic system design and dynamic characteristic study.

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