ويركزمعهد بحوثالعامة لليمينغ الصناعة الثقيلةفي مجال البحوث وتطوير التكنولوجيا المتقدمة والمنتجات الموجهة لصالح العملاء، فضلا عن بناءالقدرة التنافسية الجوهريةليجعل يمينغالصناعة الثقيلةرائدةفي هذه الصناعة.من خلال توفيرنتائج البحوثالأساسية، ويدعم المعهديمينغالصناعة الثقيلةالتكنولوجيا والمنتجات لتكون أعلىمنهافي العالمالقائمة.
معهد بحوثالعامة لليمينغ الصناعة الثقيلةهيقسم البحث والتطويرالأوليةللبحوثالتقنيةوالإدارة التقنية. وهي مسؤولة عنتطوير التكنولوجياالمطبقة علىيمينغجميع المنتجات، وإجراء البحوث الفنيةمقدمةعلى المنتجات الجديدةووضعالمعايير؛البحثالاهتزاز، والأثر، والضوضاء، والتكنولوجيا الهيدروليكية، والمطابقة الطاقةوتوفير الطاقة، والمواد الجديدة، وأنظمة التحكم، وخلق تكنولوجياتمبتكرة ومنتجاتحمليوبناءمنصة علىشبكة خاصةوعامةللتجاربوالاختباراتوذلك لتبادل التجربةالعامة ونتائج الاختبار.
· VIBRATION MONITORING OF A GEAR GRINDING PROCESS A Thesis Presented to the Graduate School of Clemson University In Partial Fulfillment of the Requirements for the Degree Master of Science Mechanical Engineering by Nandeesh Kadengodlu August 2017 Accepted by: Dr Gregory Mocko, Committee Chair Dr Laine · By vibration measurement, a new alternative could be developed for monitoring the operating parameters in grinding Keywords Ball grinding, Vibration analysis, Power spectrum estimation, Principal component, Multiple regression INTRODUCTION Mechanical grinding emits strong vibration signals presented in the form of acoustic pressure variationsMonitoring grinding parameters by vibration signal
In this paper, three approaches are compared for vibration signal classification applied to regenerative chatter monitoring in centerless grinding: neural network, time domain KL and entropy function approach Such methods have been compared in their classification performances and computational loads The results show the better performancesMonitoring grinding parameters by vibration signal measurement a primary application Author links open overlay panel Yigen Zeng E ForssbergMonitoring grinding parameters by vibration signal
Proceeding Chatter Vibration Monitoring in the Surface Grinding Process through Digital Signal Processing of Acceleration Signal † Felipe Aparecido Alexandre 1, Wenderson Nascimento Lopes 1 · Thus, [9] proposes the monitoring of chatter using the ROP statistic to extract relevant information concerning the spectral content of vibration signals (PDF) Chatter Vibration Monitoring in the Surface Grinding
· Gear grinding is a process used to improve the surface finish of machined gears to increase their lifespan and decrease noise during their operation Large scale gear grinding produces finished gears at a competitive cost but tool wear plays an important factor in the final quality The objective of this research is to identify how process parameters during the gear On Line Monitoring Of Grinding Wheel Loading In Grinding Using Vibration Analysis a RJOHNSTEPHEN, b MSELVAM cSPALANI a,b,c Department of Mechanical Engineering, Vel Tech Multi Tech DrOn Line Monitoring Of Grinding Wheel Loading In
Vibration in grinding machine is hard to measure It is witnessed from the formation of waviness on the work piece and grinding wheel The major causes of vibration in grinding machine are · Monitoring systems for a grinding process should be capable to detect unexpected malfunctions in the process with high reliability so that the production of substandard parts can be minimized Major anomalies in the grinding process are chatter vibration, grinding burning and surface roughness deteriorationThese anomalies should beCondition monitoring of gear grinding processes
· By monitoring vibration produced during the grinding and wheel dressing operations a measure of expected workpiece quality can be obtained In order to use vibration monitoring effectively as a means of detecting adverse grinding and dressing conditions it is necessary to gain an insight into the dynamics of the process so that relevant · The grinding process is complex with many interrelated parameters, and an initially stable process can become unstable as grinding conditions naturally deteriorate Forced vibration from machine rotating elements and selfexcited vibration produce a relative radial movement between the wheel and workpiece during grinding and the wheel and diamond during Vibration Monitoring of the Internal Centreless Grinding
· Thus, [9] proposes the monitoring of chatter using the ROP statistic to extract relevant information concerning the spectral content of vibration signals while grinding AISI 1045 steel with anThe grinding process is a manufacturing process that is performed at the end of the machining chain In such step, the workpiece has a high addedvalue and therefore critical problems are not allowed, as they may lead to scrap and significant financial loss Regenerative chatter is the most common form of selfexcited vibration It can occur often because most metal cutting Chatter Vibration Monitoring in the Surface Grinding
Vibration monitoring of grinding machines can help reduce delays in production, product rejections, late deliveries, and increased manufacturing costs It can also help to quickly identify the source of vibration If you are responsible for keeping Vibration monitoring of a gear grinding process By Nandeesh Kadengodlu Get PDF (3 MB) Abstract Gear grinding is a process used to improve the surface finish of machined gears to increase their lifespan and decrease noise during their operation Large scale gear grinding produces finished gears at a competitive cost but tool wear plays anVibration monitoring of a gear grinding process CORE
· times until grinding process was totally completed RESULTS Table I presents the results from the visual observation of the vibration grinding monitoring when aluminum scrap cable (5 mm ID, 1530 mm length and 30 grams weight) was under investigation The influence of the various grinding media has been studied · Monitoring Hand Arm Vibration This case study reports on an innovation introduced by Carl West of J West Engineering Company Limited to tackle the challenge of monitoring exposure to vibration in steel fabrication It could be considered for any type of industry where grinding disks are used for similar tasks, as Carl explains:Monitoring exposure to HandArm Vibration HSE
· optimizing the grinding and dressing cycles, reducing cycle time, reducing the total cost per part, etc Process Improvement: By inprocess monitoring, it can help us in studying the effects of changing the inputs such as coolants, abrasives, etc on the microscopic interactions and hence the part quality 113 Why grinding?The vibration amplitude, which is the characteristic that describes the severity of the vibration, can be quantified in several ways On the diagram, the relationship between the peaktopeak level, the peak level, the average level, and the RMS level of a sinewave is shownMeasuring Vibration: The Complete Guide Brüel & Kjær
· By monitoring vibration produced during the grinding and wheel dressing operations a measure of expected workpiece quality can be obtained In order to use vibration monitoring effectively as a means of detecting adverse grinding and dressing conditions it is necessary to gain an insight into the dynamics of the process so that relevant · The grinding process is complex with many interrelated parameters, and an initially stable process can become unstable as grinding conditions naturally deteriorate Forced vibration from machine rotating elements and selfexcited vibration produce a relative radial movement between the wheel and workpiece during grinding and the wheel and diamond during Vibration Monitoring of the Internal Centreless Grinding
The grinding process is a manufacturing process that is performed at the end of the machining chain In such step, the workpiece has a high addedvalue and therefore critical problems are not allowed, as they may lead to scrap and significant financial loss Regenerative chatter is the most common form of selfexcited vibration It can occur often because most metal cutting · times until grinding process was totally completed RESULTS Table I presents the results from the visual observation of the vibration grinding monitoring when aluminum scrap cable (5 mm ID, 1530 mm length and 30 grams weight) was under investigation The influence of the various grinding media has been studied Vibration grinding CORE
· Vibration measurement is done by different approaches This paper explains the vibration measurement done by Vibrometer The vibrations are minimized by introducing dampers, made of rubber The vibration is isolated due to the elasticity and energy absorbing property of rubber Keywords: grinding, vibration analysis, dampingChanging the die grinder for a highspeed unit to match the bit left the vibration unchanged, but the improved efficiency cut working time from 20 minutes to 2 minutes, reducing the risk by factor of three On a similar operation, simply ensuring the grinding bit was pushed fully into the chuck up reduced the level of vibration by a factor of x4NOISE & VIBRATION MONITORING Health and Safety
· Monitoring Hand Arm Vibration This case study reports on an innovation introduced by Carl West of J West Engineering Company Limited to tackle the challenge of monitoring exposure to vibration in steel fabrication It could be considered for any type of industry where grinding disks are used for similar tasks, as Carl explains:In recent years, there has been an increase in the rotation speed of grinding machine spindles and in the use of CBN grinding wheels The reason for this, is to obtain machines that are capable of achieving superior levels of surface finish With such levels of performance, the vibrations caused by the imbalance of rotating mechanical parts, in particular the grinding wheel support Technologies Balancing, Acoustic & Vibration Sensors
The vibration amplitude, which is the characteristic that describes the severity of the vibration, can be quantified in several ways On the diagram, the relationship between the peaktopeak level, the peak level, the average level, and the RMS level of a sinewave is shown · Vibration monitoring has now become a well accepted part of many planned maintenance regimes and relies on the well known characteristic vibration signatures which rolling bearings exhibit as the rolling surfaces degrade However, in most situations bearing vibration cannot be measured directly and so the bearing vibration signature is modifiedAn Overview of Bearing Vibration Analysis Schaeffler
