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Truing and dressing of CBN/seeded gel hybrid wheels with emphasis on grinding process economics and quality.

机译:CBN /种子凝胶混合砂轮的修整和修整,着重于磨削工艺的经济性和质量。

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摘要

In this study, an analytical and experimental investigation of truing and dressing process of CBN/SG grinding wheels is described. An analytical model of the interaction between CBN wheel grits and truing diamond grits was developed for rotary disc parallel and perpendicular arrangements of wheel-truer axes. The model takes into account the truing parameters, the geometry and features of the grinding wheel and truing disc, and grit retention capabilities of both these tools. It was found that number of collisions between CBN grits and diamond grits is predominantly dependent on truer specification. From the truing process parameters, when preparing a grinding wheel surface, lead is the most influential, followed by speed ratio and truing depth.;Experiments confirmed the importance of the above truing parameters as predicted by the analytical model. The limiting factor governing the frequency of wheel truing has been shown to be due to loss of profile rather than volumetric wear. In addition, if the truing conditions produce a dull grinding wheel the steady-state level of grinding force will be at a higher level than for optimally trued wheels.;A comprehensive cost model of the entire grinding operation, including auxiliary activities, was also developed. It can be used for continuous and batch-type production including reoccurring jobs. The model accounts for different types of superabrasive wheels and conventional abrasive wheels, as well as for continuous dress operation. It takes into account costs of various pieces of the equipment used, performance characteristics of each process involved in the entire grinding operation, and cost of machine time. The model allows for calculation of cost-per-part as well as target costs for all pieces of the equipment. Optimal batch sizes can be calculated for different types of wheels. Simulation results using the cost model in industrial applications are also presented. It has been shown that contrary to widespread beliefs, CBN wheels can be very cost-efficient even when used for production in small batches. In environments characterized by a high labor cost, the time efficiency of truing, dressing and other auxiliary operations is crucial in reduction of total grinding costs.
机译:在这项研究中,对CBN / SG砂轮的修整过程进行了分析和实验研究。建立了CBN砂轮和金刚石砂轮相互作用的解析模型,用于砂轮-砂轮轴平行和垂直布置。该模型考虑了修整参数,砂轮和修整盘的几何形状和特征以及这两种工具的砂砾保持能力。已经发现,CBN砂粒和金刚石砂粒之间的碰撞次数主要取决于更真实的规格。从修整工艺参数来看,在准备砂轮表面时,铅的影响最大,其次是速比和修整深度。;实验证实了分析模型所预测的上述修整参数的重要性。已经显示出控制车轮转向频率的限制因素是由于轮廓损失而不是体积磨损。另外,如果整修条件使钝的砂轮磨削,则稳态磨削力水平将比最佳磨削砂轮的磨削力水平高。;还建立了包括辅助活动在内的整个磨削操作的综合成本模型。 。它可以用于连续和批量生产,包括重复性工作。该模型考虑了不同类型的超级砂轮和常规砂轮以及连续修整操作。它考虑了所使用的各种设备的成本,整个研磨操作中涉及的每个过程的性能特征以及机器时间的成本。该模型可以计算所有设备的单件成本以及目标成本。可以针对不同类型的车轮计算出最佳的批量大小。还介绍了在工业应用中使用成本模型的仿真结果。已经表明,与普遍的看法相反,即使用于小批量生产,CBN砂轮也可能具有很高的成本效益。在劳动成本高的环境中,整饰,修整和其他辅助操作的时间效率对降低总磨削成本至关重要。

著录项

  • 作者

    Prusak, Zbigniew.;

  • 作者单位

    University of Connecticut.;

  • 授予单位 University of Connecticut.;
  • 学科 Engineering Industrial.;Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 301 p.
  • 总页数 301
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:48:27

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