Performance of a pressurized internal-cooling slotted grinding wheel system
Performance of a pressurized internal-cooling slotted grinding wheel system
复制标题
加压内冷开槽砂轮系统的性能
DOI：
10.1007/s00170-017-1014-6
复制
发表时间：
2017
影响因子：
3.4
通讯作者：
唐新姿
中科院分区：
文献类型：
--
作者：
彭锐涛;黄晓芳;唐新姿
内冷却技术是磨削难切削材料时降低磨削区温度，避免磨削烧蚀的有效冷却方法。为了克服磨削过程中磨削热产生的拉伤、烧伤、表面粘接等工艺难题，提出了一种新型的加压内冷却方法来加强磨削弧区的散热。首先，采用数值模拟的方法设计了一种具有规则晶粒分布的加压内冷槽砂轮，并通过3D打印模型进行了验证。随后，对砂轮及其支撑夹具的各个零件进行了准备和装配。最后，在相同的磨削参数下，分别采用加压内冷法和外冷法磨削镍基高温合金。结果表明：与传统外冷方式或仅依靠离心力的内冷方式相比，所提出的加压内冷方式具有更高的换热效率、更低的磨削温度和更低的表面粗糙度以及更好的表面完整性。
Internal-cooling technology is an effective cooling method to reduce the temperature in grinding zone and avoid grinding burn for grinding hard-to-cut materials. In order to overcome the technological difficult problems generated by grinding heat in grinding process, such as pull, burns, and surface bonding, a novel method of pressurized internal-cooling was proposed to strengthen the heat dissipation of grinding arc zone. Initially, a pressurized internal-cooling slotted grinding wheel with regular grain distribution was delicately designed with numeric simulation and further validated with a 3D printing model. Subsequently, various parts of the grinding wheel and its supporting fixture were prepared and assembled. Finally, pressurized internal-cooling method and external-cooling method were utilized in grinding nickel-based superalloy, respectively, under the same grinding parameters. The results indicate that the proposed pressurized internal-cooling method, compared with the traditional external-cooling method or other internal-cooling method which only rely on centrifugal force, offers higher heat transfer efficiency, lower grinding temperature and surface roughness, and better surface integrity.