• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (13): 225-232.doi: 10.3901/JME.2018.13.225

• 制造工艺与装备 • 上一篇    

单层磨料砂轮修整及修整阈值控制试验研究

冯克明1,2, 师超钰1,2, 朱建辉1,2, 赵金坠1,2   

  1. 1. 超硬材料磨具国家重点实验室 郑州 450001;
    2. 郑州磨料磨具磨削研究所有限公司 郑州 450001
  • 收稿日期:2017-08-19 修回日期:2018-02-10 出版日期:2018-07-05 发布日期:2018-07-05
  • 作者简介:冯克明,男,1963年出生,国务院特贴专家,教授级高级工程师,副总工程师。主要研究方向为磨削加工技术、超硬工具研发及应用,获部省级科技进步一等奖1项、二等奖3项、三等奖2项,获国家专利授权27项(其中发明5项),发表科研论文60余篇。E-mail:smfengkeming@163.com
  • 基金资助:
    国家自然科学基金(U1604254)、国家科技支撑计划(2015BAF31B00)和河南省重大科技专项(131100211000)资助项目。

Experimental Research of Dressing Amount Control and Quality Evaluation on Monolayer Abrasive Grinding Wheel

FENG Keming1,2, SHI Chaoyu1,2, ZHU Jianhui1,2, ZHAO Jinzhui1,2   

  1. 1. State Key Laboratory of Superabrasives, Zhengzhou 450001;
    2. Zhengzhou Research Institute for Abrasive & Grinding Co., Ltd., Zhengzhou 450001
  • Received:2017-08-19 Revised:2018-02-10 Online:2018-07-05 Published:2018-07-05

摘要: 针对粗粒度超硬磨料砂轮圆跳动难以检测技术问题,提出一种新的砂轮圆跳动检测方法,利用滑块组件与激光位移传感器有机结合,避免了砂轮表面高硬度磨料和粗糙形貌对传统量仪触头的机械干扰,排除了砂轮表面非均质材料及高陡坡磨粒的光学干扰,可实现粗粒度超硬磨料砂轮圆跳动的真实、稳定、高效、高精检测。在CNC8325数控外圆磨床上对粒度60#/70#电镀CBN砂轮进行了精密修整试验,依据“定量修整-砂轮检测-定量磨削-试件检测”循环测试方案,持续跟踪了电镀CBN砂轮圆跳动、磨削功率、试件表面质量、砂轮表面形貌渐变过程。结果表明:当电镀CBN砂轮初始圆跳动在10~20 μm时,砂轮已具有良好的综合磨削效果,可以不修整或微量修整;当砂轮表面高点区域部分磨粒去除量在磨料平均直径1/5以内时,仍可通过精密修整获取理想的砂轮表面;当砂轮表面高点区域部分磨粒去除量达1/4以上时,即使修整后砂轮圆跳动很好,也无法获得较好磨削效果,此时砂轮已不具备磨削能力。

关键词: 单层磨料砂轮, 控制, 修整, 阈值, 圆跳动

Abstract: Aiming at the difficulties in detecting radial circular run-out error of coarse-grained super-abrasive wheels, a new detection method for wheels' circular run-out error is proposed, which is based on the organic combination of a slider component and a laser displacement sensor. This method can remove mechanical disturbances on the probes of traditional instruments from high hardness abrasive and rough surface topography of wheels, and avoid optical interference on the laser sensor from heterogeneous material and steep slope grains on the wheels' surface, which help realize the actual, stability, high efficiency, high precision detection for radial circular run-out error of coarse-grained super-abrasive wheels. A precision dressing experiment, aimed at electroplated CBN wheel whose grain size is 60/70, is carried out on CNC cylindrical grinding machine. This experiment adopted the cycle test program of quantitative dressing, wheel measurement, regular grinding, and specimen workpiece inspection, at the same time, the whole changes process of the wheel run-out error, grinding power, grinding surface quality, and wheel surface topography, are kept on track. The results showed that, the electroplated CBN grinding wheel has a good overall grinding effect, which makes wheel require little or no dress, when the initial run-out error of wheel is about 10-20 μm; when the maximum removal amount of the abrasive wheel surface highest area grains is within 1/5 of grains average diameter, the desired grinding wheel surface can be obtained by precise dressing; when the maximum removal amount of the abrasive wheel surface highest area grains is within 1/4 of grains average diameter, the better grinding effect cannot be achieved even the dressed wheel run-out error is well, which has no more grinding ability.

Key words: controls, dressing, radial circular run-out error, single-layer abrasive grinding wheel, threshold value

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