Development of Non-Destructive Inspection System for Grinding Burn - An Application of the Grinding Burn Detecting Technique to Evaluate Residual Stress

2013 ◽  
Vol 797 ◽  
pp. 307-312
Author(s):  
Ryo Ito ◽  
Takayuki Azuma ◽  
Tomoyuki Kasuga ◽  
Shinji Soma ◽  
Shinji Murakami ◽  
...  
Keyword(s):  
Residual Stress ◽  
Low Cost ◽  
Detection Technique ◽  
Inspection Time ◽  
Current Sensor ◽  
Inspection System ◽  
Work Piece ◽  
Surface Residual Stress ◽  
Grinding Burn ◽  
Non Destructive

This study was performed to develop a non-destructive inspection system to detect grinding burn, which is capable of quantitative 100% inspection inside a production line. An eddy current sensor, which has advantages of short inspection time and low cost, was used. It was shown that the grinding burn detection technique had been developed and is possible to detect grinding burn by using this technique, in the 1st report1) and the 2nd report2). In this report, we have attempted to apply the grinding burn detection technique to evaluate the residual stress of work piece surface. Residual stress of work piece surface is affected by both thermal and mechanical effects. It is shown that the residual stress is possibly evaluated in the case of the thermal effect is dominant.

Development of Non-Destructive Inspection System for Grinding Burn-in-Process Detection of Grinding Burn

2014 ◽  
Vol 1017 ◽  
pp. 135-140 ◽  
Author(s):  
Ryo Ito ◽  
Naomasa Mukaide ◽  
Takayuki Azuma ◽  
Shinji Soma ◽  
Shinji Murakami ◽  
...  
Keyword(s):  
Eddy Current ◽  
Detection Technique ◽  
Inspection Time ◽  
Current Sensor ◽  
Inspection System ◽  
Work Piece ◽  
Grinding Burn ◽  
Eddy Current Sensor ◽  
Process Detection ◽  
Non Destructive

This study was performed to develop a non-destructive inspection system to detect grinding burn, which is capable of quantitative 100% inspection inside a production line. An eddy current sensor, which has advantages of short inspection time and low cost, was used. It was shown that the grinding burn detection technique had been developed and is possible to detect grinding burn by using this technique, in the 1st report1) and the 2nd report2). In this report, an experiment of in-process detection of grinding burn was conducted, by applying the grinding burn detection technique which we have developed. The eddy current sensor has been combined with an in-process gauge in order to keep the clearance between the sensor probe and the work piece constant. It was shown that grinding burn can be detected successfully during cylindrical machining.

Non-destructive Surface Residual Stress Profiling by Multireflection Grazing Incidence X-Ray Diffraction: a 7050 Al Alloy Study

2020 ◽  
Vol 60 (4) ◽  
pp. 475-480
Author(s):  
V. A. N. Righetti ◽  
T. M. B. Campos ◽  
L. B. Robatto ◽  
R. R. Rego ◽  
G. P. Thim
Keyword(s):  
Residual Stress ◽  
Grazing Incidence ◽  
Al Alloy ◽  
X Ray Diffraction ◽  
Surface Residual Stress ◽  
X Ray ◽  
Non Destructive

Role of Quantitative NDE Techniques in Life Management of Gas Turbine Components

2006 ◽  
Author(s):  
Michael Gorelik ◽  
Waled T. Hassan ◽  
Harry Kington
Keyword(s):  
Residual Stress ◽  
Stress Gradient ◽  
Surface Residual Stress ◽  
Major Barrier ◽  
Near Surface ◽  
Life Management ◽  
Surface Residual Stresses ◽  
Engine Components ◽  
Nondestructive Measurements ◽  
Non Destructive

A number of earlier publications discussed the benefits of probabilistic analysis and probabilistic lifing in application to critical rotating engine components. One of the important variables in both probabilistic and deterministic lifing analysis is the level of residual stress in the component. Near surface residual stresses directly influence the fatigue life of critical engine rotating components. Depending on sign and magnitude a near surface residual stress gradient can either inhibit or accelerate fatigue initiation and crack propagation. A major barrier to introducing subsurface residual stress information into the life calculation process is the necessity to make accurate and reliable nondestructive measurements on as produced hardware. The paper reviews several NDE technologies that could be candidates for both production and in-service non-destructive residual stress measurements. The importance of having accurate residual stress information and its use in the probabilistic design and life management process is illustrated on several examples. A linkage with several ongoing industry R&D programs is discussed.

Study on Grinding Crack of Premium Thread Gauge Material 9Mn2V

2013 ◽  
Vol 589-590 ◽  
pp. 252-257
Author(s):  
Ming Chen ◽  
Da Peng Dong ◽  
Guo Qiang Guo ◽  
Qing Long An
Keyword(s):  
Residual Stress ◽  
Surface Integrity ◽  
Heat Affected Zone ◽  
Surface Grinding ◽  
Surface Residual Stress ◽  
Specific Grinding Energy ◽  
Grinding Burn ◽  
Metallographic Structure

This paper investigates the surface integrity of premium thread gauge material 9Mn2V in reciprocating surface grinding using SG abrasive, which includes metallographic structure for grinding crack, specific grinding energy and surface residual stress. The specific grinding energy and the surface residual stress can be reduced after the workpiece gets tempered, so small grinding depth can lead to the generation of cracks when the workpiece is not tempered. Otherwise, the depth of heat affected zone increases with the increase of grinding depth, but not increases proportionally. After 9Mn2V is tempered, the occurrence of grinding burn and grinding cracks can be improved.

A Study on Identification of Bubble Movements in an Automatic Wheel Leakage Detection System

2006 ◽  
Vol 326-328 ◽  
pp. 453-456
Author(s):  
Kwang Suck Boo ◽  
Hyun Ho Yook ◽  
Jong Il Lee ◽  
Woo Seong Che
Keyword(s):  
Detection System ◽  
Low Cost ◽  
Die Casting ◽  
Casting Process ◽  
Mirror Image ◽  
Inspection Time ◽  
Inspection System ◽  
Light Sources ◽  
Cooling Period ◽  
Wheel Rim

This paper describes a method to detect leaks on the surface of a wheel rim manufactured by aluminum die casting and forging. Leaks in the wheel rim may be caused by temperature gradient differences during the cooling period, impurities, or flowing air bubbles in the die casting process. We developed a new low-cost approach to detect leaks that only required a short inspection time by observing the movement of soap bubbles on the wheel rim surface. We designed new light sources to minimize mirror image effects and irregular luminance distributions on the curved wheel rim surface. A preprocessing procedure for image processing was also developed to determine the bubble configurations using threshold and morphology techniques. A series of experiments were conducted to evaluate the performance of the inspection system. The results demonstrated that leaks generated during the wheel rim manufacturing process could be accurately detected even under various environmental lighting conditions.

Non-destructive Neutron Surface Residual Stress Analysis

2019 ◽  
Vol 38 (3) ◽  
Author(s):  
J. Rebelo Kornmeier ◽  
M. Hofmann ◽  
W. M. Gan ◽  
J. Gibmeier ◽  
J. Saroun
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
Surface Residual Stress ◽  
Residual Stress Analysis ◽  
Non Destructive

The Machined Surface Residual Stress of Nano-Ceramics with Two-Dimensional Ultrasonic Vibration Assisted Grinding

2010 ◽  
Vol 455 ◽  
pp. 637-642 ◽  
Author(s):  
X.Q. Zhang ◽  
Chong Yang Zhao ◽  
Bao Yu Du
Keyword(s):  
Residual Stress ◽  
Ultrasonic Vibration ◽  
Wear Particle ◽  
Surface Plastic Deformation ◽  
Work Piece ◽  
Surface Plastic ◽  
Two Dimensional ◽  
Surface Residual Stress ◽  
Machined Surface ◽  
Ultrasonic Grinding

Surface plastic deformation form and residual stress distribution of nano-ceramics machined by ordinary grinding and two-dimensional ultrasonic grinding respectively were investigated. The obtained results show that machined surface residual stress in the two grinding modes is extrusion stress, and it decreased with the increasing of grinding depth. But the decrease of residual stress under two-dimensional ultrasonic grinding is less than that under normal grinding. In addition, under the same grinding parameters, the surface residual stress on two-dimensional ultrasonic vibration grinding is larger than that on ordinary grinding, and if other parameters unchanged, it is increased with the increase of wear particle granularity in the two grinding modes. It is produced by the reason that ductile regime of ceramic grinding become larger under ultrasonic grinding, so that material is still removed by plastic form at great depth. Plastic removal mode will produce greater surface extrusion stress, so with the increasing of grinding depth, the decreasing of residual stress under two-dimensional ultrasonic vibration grinding is less than that under the normal grinding. At the same time, the regular separating between wear particle and work piece improves the heat emission condition, which is also one of the reasons that the surface residual stress under two-dimensional ultrasonic grinding is larger than that under ordinary grinding.

The Development for Green Channel Cargo Inspection System

2012 ◽  
Vol 152-154 ◽  
pp. 1736-1740
Author(s):  
Yuan Ping Shi ◽  
Jing Sheng Yu ◽  
Li Qin Zhang ◽  
Hong Qiang Sun ◽  
Pu Hao
Keyword(s):  
Low Cost ◽  
Inspection System ◽  
Non Destructive Testing ◽  
Standard Samples ◽  
Destructive Testing ◽  
Green Channel ◽  
Manual Inspection ◽  
Cargo Inspection ◽  
Inspection Systems ◽  
Non Destructive

We designed a set of non-destructive system which is based on ray inspection systems, it mainly used to detect the Green Channel Cargo, and the result will be given out within 30 seconds. The ray coefficient of the Green Channel Cargo are different from the other transport cargo, so we can measure the absorption coefficient and compare it with the standard samples which is pre-built. The moved radioactive source and detector are designed, in order to prevent the mixed goods, we designed the removable radioactive sources and detectors, so the goods can be scanned up and down and around. Once the goods are mixed together, the ray coefficient which is calculated synchronously will be abnormal, parking and manual inspection is a supplementary means, so as to achieve a low-cost non-destructive testing.

Effect of EDM Conditions on Surface Residual Stress of Cr12MoV Steel

2011 ◽  
Vol 697-698 ◽  
pp. 171-175
Author(s):  
Xiao Song Li ◽  
An Hui Cai ◽  
Ji Jie Zeng
Keyword(s):  
Residual Stress ◽  
Electrode Materials ◽  
Cooling Capacity ◽  
Pulse Interval ◽  
Work Piece ◽  
Tool Electrode ◽  
Layer By Layer ◽  
Surface Residual Stress ◽  
High Temperature Heat Treatment ◽  
Processing Power

In this paper, surface residual stress in the cold working tool steel (Cr12MoV) by EDM was investigated by X-350 X-ray residual stress analyzer and method of DJP-2 electrolytic polishing instrument to remove layer by layer in the different EDM conditions. The results show that the distribution of surface residual stress generated not only by the peak discharge current and pulse width, but also by pulse interval. The same depth from the surface, residual stress of material after hardening is larger than the residual stress after annealing, With the different combination of tool electrode and work-piece material, the form of the discharge between two electrodes and the proportion of energy put between two electrodes are different, surface residual stress are also different. Different processing liquid for processing, the depth of residual stress generated is much the same, but closer to the surface, the worse the cooling capacity (quench degrees) and surface physical properties of processing fluids, the greater the residual stress. EDM, the generation and control of the surface residual stress depends on the choice such as processing power criteria, work-piece material, electrode materials and processing liquid. Surface residual stress after processing can be used to eliminate high-temperature heat treatment.

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