面对制造业结构调整及产业转型升级的加快、智能制造技术迅速提升、学生对自身职业发展的多层次、多样性需求,以及高职扩招生源构成多样化和多类型生源差异化等现状,传统"以教为中心"的人才培养方式已不能适应新时代职业教育发展要求.高职院校特别是"双高"建设院校和专业群,应践行"以生为本""以学为中心"的教学理念,创新学生多元发展的人才培养方案,构建多层次课程体系,深化"三教"改革,创新校企协同育人,开展多样化评价,为制造业培养智能制造产业链急需的复合型、创新型高素质技术技能人才.

为了解决因汽车颤振引起驾乘者不舒适感的问题,对汽车起步或换档时产生颤振的成因以及影响因素进行了研究.首先,分析了颤振产生的原因和表征,建立了自诱发振动模型和受力振动模型;然后,对汽车颤振进行了实际测试和仿真,分析了汽车产生自诱发颤振和压力诱发颤振的条件、机理;最后,讨论了各种因素对汽车颤振的影响.研究结果表明:颤振只发生在离合器滑磨阶段,摩擦片负摩擦系数梯度会产生汽车自诱发颤振,发动机绝对转速、离合器从动盘与压盘的转速差、变速箱转速和曲轴轴向振动的变化会产生压力诱发颤振;通过增大摩擦片的摩擦系数梯度、内置一个柔软的波形片、合理限制产品公差、装配中预紧、提高传动系阻尼等可以有效减少汽车颤振,提高汽车的驾乘舒适性,从而为离合器的设计和制造提供改进方向.

如何培养学生的方法能力、社会能力、专业能力,使学生具备可持续发展能力,是这个日新月异、终身学习时代对高职教育工作者提出的最新要求.为解决高职教育教学没有形成真正的项目化教学、没有树立能力本位教学理念等问题,浙江机电职业技术学院率先引入德国职教专家胡格教学模式,在机械制造与自动化专业对基于能力本位的学年项目制教学模式做了有益的探索与实践,取得了显著的成效.

浙江机电职业技术学院借助国家示范性高职院校重点专业建设的东风,坚持校企合作办学模式,依托产学合作站,建立校外实习基地,大力开展顶岗实习,探索工学结合教育模式,积极为企业提供技术服务和职业培训,校企合作,携手育人,旨在为浙江省乃至全国制造业培养懂工艺、会操作、具备工艺实施能力和数控操作能力的高素质技能型专门人才。

校外实习基地建设是工学结合人才培养模式改革的重要环节。本文通过分析校外实习基地建设的现状,探索校外实习基地建设的新思路,充分发挥校外实习基地应有的作用。

In order to solve the problem of data explosion during disassembly sequencing for products that have complex structure,disassembly features of typical mechanical components were analyzed,valid intersections of freedom of a part were regarded as its possible disassembly directions.Applying the principle of constraint eliminating,disassembly sequencing was realized by heuristic algorithms.To further improve computation efficiency and practicability of the disassembly sequence,a hierarchical construction model was introduced to downgrade assembly depth of a product.By means of structural decomposing,computation reduction was realized since that was unnecessary to determine the disassembly sequence for any single part of the entire product.The disassembly sequencing procedure was illustrated by a vehicle model.The result indicates that the amount of computation during disassembly sequencing is significantly reduced by the hierarchical construction model-based constraint eliminating,and therefore data explosion for complex products is controlled.

It's very difficult to machine titanium alloy because of its features of small deformation coefficient, low thermal conductivity, small elastic modulus and large chemical activity. In this paper, we take titanium alloy TC4 as an example; using the finite element method (FEM) for the physical simulation of milling process, analyze the impact of some tool geometric parameters, such as rake angle, relief angle, rounded cutting edge radius etc., on chip form, cutting force, cutting temperature distribution of cutting tool and the maximum cutting temperature of rake face etc.. On this basis, we choose the best tool geometries, which can be taken as a theoretical reference for developing process plans of titanium alloy to reduce the number of tests and costs of field trials and to improve productivity.

Taking clutch diaphragm spring as example, the models for processing cost of diaphragm spring are studied. Different models for the relation between processing cost and processing tolerance are adopted for the processing of different parts of spring. Then based on these models combined with dimension segment and its processing tolerance or accuracy, a probabilistic optimization model for the dimension discrete range of spring is established and a probabilistic optimization is performed with the expected pass rate of spring as constraint and the minimum manufacturing cost as objective. Finally a dimension tolerance is obtained, which has a minimum relative processing cost with a pass rate meeting the constraint.

以工学结合人才培养模式带动专业建设,改革课程体系和教学内容,改革教学方法和教学手段,是国家示范性高等职业院校建设的重要内容。三年来通过对工学结合、顶岗实习模式的全方位探索、实践,总结出了"产学合作工作站"、"企业学院"、"区域集中、企业分散"三种主要模式,取得了显著成效。

Analysis on the static rigidity,maximum stress at the place of weak section and the inherent frequency of the being designed jiggle platform based on flexible hinges was carried out in this paper.The modelling of platform was carried out by the use of finite element method.The discrepancies between value of the static rigidity and the maximum stress of the platform educed from simulation and the calculated results were respectively 2.5 % and 3.1%.The inherent frequency and static rigidity of platform have been tested in the experiment and an ideal result was gained as well.It can be seen that there exists feasibility for analyzing the characteristics of jiggle platform through formulae,thus provided a kind of reference for the characteristics research of jiggle platform.

This paper studied on free curved surface reconstruction of hand-drawing with reverse technology and point-surface CAD model reconstruction.The paper suggested that using points-projected and edge-character methods to reconstruction dense point cloud on hand-drawing maple leaf picture.

The performance of paper delivery mechanism in a printer is crucial to the color process resolution of the whole machine.In order to ameliorate the dynamic characteristic of a high speed paper delivery system,a three-dimensional model is established and simplified.In addition,the torque fluctuation,transverse vibration as well as torsional vibration generated by AC motor are analyzed and elaborated in this paper.Further more,the electromechanical equation of a paper delivery system is set up.After careful analysis and consideration,it is concluded that several factors such as the torque fluctuation of an AC motor drive system will have significant impact on the dynamic performance of the mechanism and its relationship with drive system parameter and structural parameter.Therefore it could ameliorate and improve the dynamic characteristic of paper delivery system in a printer.

According to Almen-Laszlo equation of load vs deformation for diaphragm spring clutch,actual operating characteristics of the diaphragm spring clutch were analyzed in detail.Based on the analysis,measures that should be taken in the designing and manufacturing of the diaphragm spring clutch are presented.

Module partition influences the design of product family in modular product design.Fuzzy clustering based on partition criteria with functional and structural correlation is proposed so as to keep function independent between modules.Module partition is determined by setting the threshold value.Variant parts are designed on the basis of module partition above to compose product family so that a design approach for personalized requirement of customer is provided.

As a key part of diaphragm spring clutch, diaphragm spring determines the load characteristics of the clutch by its load-distortion properties that are sensitive to the dimension of diaphragm spring. In order to predict or determine the probability of normal performance under desired working condition to control qualified rate of products, calculus of probability model for load-distortion properties of diaphragm spring by means of mathematical statistics was established. Based on the model, the standard deviation was calculated by applying normal distribution algebra, first order second moment method and Monte Carlo simulation. The standard deviation is relatively less by normal distribution algebra; bigger by first order second moment method, and fluctuant along with false random sample by Monte Carlo simulation. These three methods all satisfied design precision of automobile clutch diaphragm spring.

文章从培养"专业知识扎实、技术能力突出、综合素质优良"的高素质技能型专门人才的高职人才培养特色出发,对《金属切削原理与刀具》课程改革教学内容、改进教学方法、采用现代化教学技术,从而激发学生学习兴趣,提高教学效果,培养学生动手能力和职业技能、创新能力。