摘要：Inordertominimizethenormalerrorsoftheprofileofthecylindercam,thatarebroughtinbytools'radialerrorsinthemachiningprocess,anewmachiningmethod,optimalcontrolmethod,***followerasanexample,thenormalerrorsofthecamprofilearisingfromtheoptimalcontrolmachiningprocessisdiscussedbyusingspatialmeshingtheory,andasimpleandconciseapproximateformulatocalculatenormalerro

摘要：This paper presents a strategy to generate interference-free tool paths for machining sculptured surfaces. The strategy proposed here is first to determine the tool path topology. The values of the step length and the path interval are then calculated based on the machining tolerance requirements. After detecting and eliminating the tool interference, the interference-free tool path is generated. The effectiveness of the developed algorithm is demonstrated through simulation and actual cutting tests.

摘要：A vital part of enhancing the ability of students to learn about advanced fabrication techniques is identifying the barriers to the student’s entry and excelling in the manufacturing field. In the Manufacturing and Mechanical Technology fields, there exists an intimidating experience gap or barrier between professionals and novice students. The students’ participation in the design and fabrication of a fixture for manufacturing a mechanical part will aid in eliminating this barrier by making fuel cell’s bipolar plates production accessible to inexperienced technology students. The process of manufacturing a fixture for the production of hydrogen fuel cell and hydrogen purifier plates required a careful planning and step-by-step methodological implementation. Through the use of our designed fixture, it is now possible to teach students how to use a CNC milling machine with relative ease while also allowing for precision part machining. The setup of the fixture allows students to observe the necessary measures to properly machine a part while also teaching them the benefits of fixtures in the manufacturing industry. In summary, the purpose of this paper is to provide the students with applied learning experience through involving them in the design and fabrication of a multi-disciplinary mechanical fixture and the utilization of practice oriented teaching resources in a full scale learning environment.

摘要：A compound machine tool was designed, which combined rotary ultrasonic assisted grinding, electrical discharge machining(EDM) and multi-axis milling. Experimental results indicated that its positioning accuracy was less than 5.6 μm and its repetitive positioning accuracy was less than 1.8 μm; the vibration amplitude of ultrasonic grinding system was uniform and stable, and the EDM system worked well and stably.A smooth surface of K9 optical glass component was achieved by the grinding method.

摘要：运用ANSYS Workbench集成研发平台,对某种高速立式加工中心主轴箱进行自由模态分析,提取主轴箱的前12阶频率,查看(7～12)阶频率对应的振形图,结果显示出了主轴箱各部分结构振动的强弱分布以及抗振薄弱区,据其评价主轴箱的抗振性能,为高速立式加工中心主轴箱结构设计和优化提供前提依据。

摘要：CNC系统轮廓控制最主要的问题是如何减小数控加工的轮廓误差。根据切线轮廓误差坐标理论,分析了数控加工中切线轮廓误差形成机理,提出了优化切线轮廓误差估算方法,推导了自由曲线优化轮廓误差模型,为提高CNC系统轮廓控制精度提供了一定的理论依据。

摘要：分析了五轴联动数控中心加工不锈钢叶轮的技术难点,并运用仿真技术加以解决。提出了仿真方法和仿真流程,并基于VERICUT仿真平台,以某型号叶轮的加工过程为例,实际进行了仿真。仿真结果显示加工刀具、加工参数对叶轮质量有重要影响。分析了仿真出现的问题,通过改变刀具、优化加工方案,最终完成了加工。实践证明,仿真技术有利于提高不锈钢叶轮的加工成功率,改进加工质量。

摘要：针对闭式整体构件电解加工间隙流场分布不均匀的,基于电解加工间隙流场,设计了阴极过水孔工作端面,比较了不同背压条件下电解加工间隙流场,分析了间隙流场空穴、涡流现象.研究结果表明,通过改变过水孔分的疏密,孔径的大小和形状,增加背压,消除了间隙流场中低流速区域,电解液较低流速区域的速度由0.239 7m/s提升至0.508 5m/s,减少了空穴和涡流现象的发生,优化了阴极结构.