Designed a Passive Grinding Test Machine to Simulate Passive Grinding Process

Liu, Peng-Zhan; Zhou, Wenjun; Jin, Peng; Song, Xudong; Xiao, Furen

doi:10.3390/pr9081317

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…In 1986, Tate, A. R. of MIT used robots to realize automatic grinding of welds, and controlled the maximum normal force at 40 N and the maximum frequency of reference force at 2.3 Hz [ 17 ]. Later, another researcher, Peng J et al [ 18 ], designed a passive grinding device, and studied the characteristics of the grinding process and the influence of the deflection angle in the passive grinding process. To meet the requirements of grinding complex parts, Guo Wanjin et al from Harbin Institute of Technology designed and developed a compound 5-Dof working robot having large dexterity in its working space and dexterity in its attitude adjustment [ 19 ].…”

Section: Development History Of Grinding Processmentioning

confidence: 99%

Analysis of Current Situation, Demand and Development Trend of Casting Grinding Technology

Liang

Qiao

2022

Micromachines

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Although grinding is essential in the production of castings, the casting grinding process in manufacturing is complicated and there are many difficulties, such as the large amount of noise in the grinding environment, non-structural casting entities, and the inclination in the overall shape–time variation. Even in the face of complex technology and a variety of difficulties, modern casting grinding technology still demands large-batch production, low cost, fast response, thin brittleness, high precision, etc. The grinding process has a long history. This paper focus on its development from a human-operated, mechanical job, to an automatic grinding task based on compliant control theory. However, the methods mentioned above can no longer satisfy the current production need. In recent years, researchers have proposed intelligent grinding methods to meet the needs of modern casting production, and provided various strategies and alternatives to the challenges of machining accuracy, machining efficiency, and surface consistency. The research direction of casting polishing has mainly focused on online robot detection, material removal prediction, constant grinding contact force control, and high-precision matching. Although applications for online detection and constant grinding contact force control exist in industry, there are challenges in material removal prediction and three-dimensional high-precision matching. This paper also compares and analyzes the advantages and disadvantages of different grinding methods, and puts forward some research directions for future work, so as to promote more intelligent and efficient grinding of complex castings in practical application.

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Section: Development History Of Grinding Processmentioning

confidence: 99%

Analysis of Current Situation, Demand and Development Trend of Casting Grinding Technology

Liang

Qiao

2022

Micromachines

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“…Исходя из теории резания единичным зерном [18][19][20] удаляемый слой металла при шлифовании определяется глубиной рисок, формируемых абразивными зернами и их количеством. В свою очередь, глубина рисок определяется силой прижатия шлифовального круга к обрабатываемой поверхности, а их количество -частотой вращения шлифовального круга.…”

Section: теоретические исследованияunclassified

Theoretical analysis of passive rail grinding

Ilinykh¹,

Banul²,

Vorontsov³

2022

Metal Working and Material Science

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Introduction. There are different rail machining technologies designed to eliminate defects on the tread surface and extend the life cycle of rails. The most used is the technology of grinding rails with rotating grinding wheels using rail-grinding trains. Its main disadvantage is the low working speed of the grinding train that requires the organization of track possessions with stopping the movement of trains along the haul. To perform preventive rail grinding with minimal metal removal from the rail head, passive grinding technologies using grinding wheels have become widespread in last years. Passive grinding is when there is no power on the grinding wheel to rotate it actively. Such methods make it possible to achieve high speeds of the grinding train, and the work can be carried out in the train schedule without closing the stage. Currently, passive grinding technologies are relatively new and do not have the necessary scientific basis for optimizing the machining process. The aim of the work is to perform theoretical studies of kinematic and force analyzes of two methods of rail passive grinding: the periphery and the end face of the grinding wheel. Methodology of the work is kinematic and power calculations of rail grinding schemes. Results and discussion. Within the framework of theoretical studies, a kinematic and force analysis of two methods of passive grinding are carried out, on the basis of which the optimal conditions for its implementation are determined. It is established that the method of passive grinding by the periphery of the wheel has a 20 % higher productivity and energy efficiency of the process before end passive grinding due to the higher rotation speed of the grinding wheel with equal forces of pressing it to the rail. At the same time, passive grinding with the end of the wheel is distinguished by a twice greater range of change in both the speed of the grinding wheel rotation and the force of its pressing that makes it possible to achieve greater metal removal at equal speeds of the grinding trains. In conclusion, promising tasks for further research in the field of passive rail grinding are formulated.

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“…Heavy-duty grinding wheels made of phenolic resin binder are frequently required to execute grinding operations on rails in the rail grinding process [5,6]. However, grinding wheels are typically required to grind rails at high grinding pressures, and environmental protection concerns prohibit the use of coolants during rail grinding [7,8]. In consequence, rail grinding wheels are frequently subjected to extreme grinding squeezing, grinding impact behavior, and high grinding temperatures when grinding rails [9,10].…”

Section: Introductionmentioning

confidence: 99%

Study on the Preparation and Performance of Silicone-Modified Phenolic Resin Binder for Rail Grinding Wheels

et al. 2023

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A scheme for manufacturing heavy-duty rail grinding wheels with silicone-modified phenolic resin (SMPR) as a binder in the field of rail grinding is presented to improve the performance of grinding wheels. To optimize the heat resistance and mechanical performance of rail grinding wheels, an SMPR for industrial production of rail grinding wheels was prepared in a two-step reaction using methyl-trimethoxy-silane (MTMS) as the organosilicon modifier by guiding the occurrence of the transesterification and addition polymerization reactions. The effect of MTMS concentration on the performance of silicone-modified phenolic resin for application in rail grinding wheels was investigated. The molecular structure, thermal stability, bending strength, and impact strength values of the SMPR were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and mechanical property testing, and the effect of MTMS content on the resin properties was investigated. The results indicated that MTMS successfully improved the performance of the phenolic resin. The thermogravimetric weight loss temperature of the SMPR modified by MTMS with 40% phenol mass at 30% weight loss is 66% higher than that of common phenolic resin (UMPR), exhibiting the best thermal stability; in addition, its bending strength and impact strength were enhanced by approximately 14% and 6%, respectively, compared with those of common UMPR. This study utilized an innovative Bronsted acid as a catalyst and simplified several intermediate reactions in the conventional silicone-modified phenolic resin technology. This new investigation of the synthesis process decreases the manufacturing cost of the SMPR, liberates it from the restrictions of grinding applications, and enables the SMPR to maximize its performance in the rail grinding industry. This study serves as a reference for future work on resin binders for grinding wheels and the development of rail grinding wheel manufacturing technology.

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Designed a Passive Grinding Test Machine to Simulate Passive Grinding Process

Cited by 7 publications

References 32 publications

Analysis of Current Situation, Demand and Development Trend of Casting Grinding Technology

Analysis of Current Situation, Demand and Development Trend of Casting Grinding Technology

Theoretical analysis of passive rail grinding

Study on the Preparation and Performance of Silicone-Modified Phenolic Resin Binder for Rail Grinding Wheels

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