Kinematics and trajectory of both-sides cylindrical lapping process in planetary motion type

Yuan, Julong; Yao, Weifeng; Zhao, Ping; Lyu, Binghai; Chen, Zhixiang; Zhong, Mingjun

doi:10.1016/j.ijmachtools.2015.02.004

Cited by 60 publications

(13 citation statements)

References 14 publications

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“…The kinematics of lapping machines has also been the object of research. Paper [14] proposes a system of simultaneous two-sided lapping in the planetary motion of the cylindrical surfaces of bearing rollers. The conclusion showed that the rolling speed of rollers only depends on the rotation speed of the lower plate rather than on that of the upper plate.…”

Section: Principle Of Lapping and Related Workmentioning

confidence: 99%

Developing an Analytical Model and Computing Tool for Optimizing Lapping Operations of Flat Objects Made of Alloyed Steels

Deaconescu

2020

Materials

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Lapping is a finishing process where loose abrasive grains contained in a slurry are pressed against a workpiece to reduce its surface roughness. To perform a lapping operation, the user needs to set the values of the respective lapping conditions (e.g., pressure, depth of cut, the rotational speed of the pressing lap plate, and alike) based on some material properties of the workpiece, abrasive grains, and slurry, as well as on the desired surface roughness. Therefore, a mathematical model is needed that establishes the relationships among the abovementioned parameters. The mathematical model can be used to develop a lapping operation optimization system, as well. To this date, such a model and system are not available mainly because the relationships among lapping conditions, material properties of abrasive grains and slurry, and surface roughness are difficult to establish. This study solves this problem. It presents a mathematical model establishing the required relationships. It also presents a system developed based on the mathematical model. In addition, the efficacy of the system is also shown using a case study. This study thus helps systematize lapping operations in regard to real-world applications.

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Section: Principle Of Lapping and Related Workmentioning

confidence: 99%

Developing an Analytical Model and Computing Tool for Optimizing Lapping Operations of Flat Objects Made of Alloyed Steels

Deaconescu

2020

Materials

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“…The trajectory of lapping/grinding grits plays a determinant role in the material removal characteristics, surface quality, and dimensional accuracy of lapped workpieces. It has been revealed that the more uniform the trajectory of grinding grits, the higher the MRR and surface integrity of ground and lapped surfaces of sapphire [14,15]. Hence, trajectory analysis not only promises an understanding of the difference in the performance of abrasive tools during sapphire lapping, but also provides a useful reference for the design of lapping plates, especially the arrangement of abrasive blocks.…”

Section: Trajectory Analysis and Pattern Designmentioning

confidence: 99%

Removal Characteristics of Sapphire Lapping using Composite Plates with Consciously Patterned Resinoid-Bonded Semifixed Diamond Grits

Wang

Huang

et al. 2020

Crystals

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Sapphire lapping is of key importance for the successful planarization of wafers that are widely present in electronic devices. However, the high hardness of sapphire makes it extremely challenging to improve its material removal rate during the lapping process without compromising surface quality and dimensional accuracy. In this work, a novel composite lapping plate consisting of a rigid resin frame and flexible sol–gel balls was fabricated with consciously designed patterns. Through lapping experiment, it was revealed that the diamond grits imbedded in the sol–gel balls can effectively lap the sapphire at a promising material removal rate (MRR), without the formation of undesirable scratches and loss of surface integrity. Moreover, by designing the arrangement patterns of sol–gel balls, the total thickness variation (TTV) can also be ensured for lapped sapphire substrates. The implications of experimental results were also discussed based on the trajectory analysis and contact mechanics of lapping grits in order to demonstrate the potential of the newly developed composite abrasive tools for sapphire-lapping applications.

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“…In the work [4], there is considered the process of double-side lapping of cylindrical surfaces with a help of planetary mechanism used in the machine's drive. The analysis of influence of the rolling speed of rollers on the quality of the treated surface is carried out.…”

Section: Review Of Modern Information Sources On the Subject Of The Pmentioning

confidence: 99%

Substantiation of inertial, stiffness and excitation parameters of vibratory lapping machine with linear oscillations of laps

Kuzio¹,

Zakharov²,

Korendiy³

2018

Ukr. j. mech. eng. mater. sci.

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Problem statement. Designing and manufacturing of efficient resonant vibratory lapping machines with linear oscillations of laps demand an accurate and detailed calculation of parameters of their elastic systems and electromagnetic drives. Purpose. The main objective of this research consists in derivation of analytical dependencies for calculating the stiffness and excitation parameters of mechanical oscillatory system of vibratory finishing machine in order to ensure its resonance operation mode. Methodology. The technique of the research is based on fundamental concepts of engineering mechanics, strength of materials and theory of mechanical vibrations. Findings (results). The design diagram of mechanical oscillatory system of vibratory finishing machine with linear oscillations of laps is considered and corresponding equations of motion are presented. Analytical dependencies for calculating stiffness and excitation parameters of the system are deduced. The example of parameters calculation is given and time dependencies of the system's motion are constructed. Originality (novelty). The mathematical model of linear oscillations of the three-mass mechanical system of vibratory finishing machine was developed. The possibilities of performing the laps dressing using "lap over lap" method were substantiated. Practical value. The results of the performed investigations can be used during designing new designs and improving existing structures of vibratory finishing machines for lapping flat surfaces of cylindric and prismatic parts. Scopes of further investigations. In further investigations, it is necessary to analyse the influence of the viscous damping on the system's motion. In order to substantiate (justify) the obtained theoretical results, the experimental investigations should be carried out.

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Kinematics and trajectory of both-sides cylindrical lapping process in planetary motion type

Cited by 60 publications

References 14 publications

Developing an Analytical Model and Computing Tool for Optimizing Lapping Operations of Flat Objects Made of Alloyed Steels

Developing an Analytical Model and Computing Tool for Optimizing Lapping Operations of Flat Objects Made of Alloyed Steels

Removal Characteristics of Sapphire Lapping using Composite Plates with Consciously Patterned Resinoid-Bonded Semifixed Diamond Grits

Substantiation of inertial, stiffness and excitation parameters of vibratory lapping machine with linear oscillations of laps

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