以矩形盒外形鱼罐头拉延为研究对象,利用正交实验的方法,以最大减薄率为研究指标,使用冲压速度、压边力、模具间隙3个参数为影响因子,使用SolidWorks建立的三维模型建立,根据理论计算结果通过CAE软件Dynaform按照3水平3因素的实验方法进行仿真模拟,观察并记录各组仿真结果的成形质量,通过减薄率进行极差分析,得到最优工艺组合:压边力为31000 N,冲压速度为5000 mm/s,模具间隙为0.23 mm.并使用其工艺参数进行拉延仿真,得到结果无开裂和起皱缺陷,表面质量无缺陷,根据得出的结果指导实际生产,符合工艺要求,该方法简化了实际生产实践中所需要的多次调节步骤.

金枪鱼罐头盒完成取料、冲压、检测之后.罐头盒进行叠罐时,需要将水平放置的罐头盒摆放成竖直放置,以便于叠罐.文中以长度约为110 mm,宽度约为66 mm,高度约为29 mm的金枪鱼罐头盒为例,设计一套机械装置用来叠罐.该装置主要由分离机构、推盒机构、整列机构、传送机构、固定装置、光电传感器、导轨和气缸等组成.依据罐头盒和圆柱磁铁的摩擦力测试实验,得出罐头盒与圆柱磁铁的摩擦力和罐头盒数量的函数关系,根据M形机构的转动需求和气缸的长度,确定摇杆的长度X=28.6 mm.该装置基本实现了自动化控制,降低了员工的工作量,提升公司的生产效率,降低用人成本,满足了企业的需求.

脱壳是贻贝加工工艺中的重要工序,针对传统加工过程中存在的脱壳效率低、设备缺乏、得肉率低等问题,提出了一种新型贻贝单边脱壳装置,主要由定向、排序和脱壳三部分组成.装置采用热处理与机械加工组合脱壳技术,介绍了其主要部件的工作原理.为贻贝产业化单边脱壳提供新途径,有利于改变贻贝食品品种单一的现状,对开发贻贝新产品、振兴贻贝加工业具有重要意义.

舟山渔船水上交通事故频发,给社会造成了巨大损失.总结了传统救生设备的主要缺陷,基于智能救生设备的发展现状和特点优势,提出将水上智能救生设备应用于舟山渔船的解决办法,并分析其必要性.水上智能救生设备的应用,有利于提高舟山渔业装备安全技术水平,维护渔民生命安全,保持经济稳定发展.

6.红外脱壳法红外脱壳法即利用红外辐射破坏闭壳肌与贝壳之间的胶原连接,但这使得部分贝肉被熟制.因此对于红外辐射温度的控制是关键.红外辐射加热具有节能、加热效果好、容易控制等优点.根据贻贝加热时仅破坏闭壳肌的胶原蛋白而不蒸熟贻贝肉的要求,从红外吸收定律出发,结合试验测试,选择辐射源的最佳工作波段、工作温度、辐射时间和辐射距离.红外辐射技术应用及探索前景广阔,不足之处在于研发成本较高,故短时间内可能在国内得不到推广.

The heat of linear motor affects normal operation of the motor seriously. The accurate computation of temperature field will provide a theoretical foundation for the design and control of linear motor. A three-dimension finite element heat model of flat linear motor is created. As the linear motor is running back and forth in an adjustable speed,the average effective current of linear motor can be calculated firstly. On this basis,the calorific value of the linear motor is calculated. The heat transfer coefficient of linear motor in each surface is calculated. Then the thermal characteristic of the flat linear motor is calculated by ansys. The experimental research of the linear motor's thermal characteristic is completed when the linear motor is no load. Comparisons between the experiment analyses and finite element simulation showgood correlation.The thermal characteristic of the linear motor can be simulated accurately by the thermal model created in this paper.

Manual hydraulic pallet truck is the important logistics handling equipment , the frames are made of profiled sheet metal welded .In order to improve the welding quality and production efficien-cy , reduce labor intensity , the main welding stations using synchronous dual robot welding processing be imperative .Based on fully considering the welding deformation and motion interference , the mathematical model of dual robot simultaneous welding is establish by quantum behaved particle swarm optimization , simulation to approximate solution the global optimal solution of welding path , and do the simulation test-ed particle swarm optimization and quantum behaved particle swarm optimization .The results show that the quantum behaved particle swarm optimization can better search in the whole solution space , effective-ly solve the problem of dual robot simultaneous welding the truck frame in the main welding process to a certain extent .

The characteristics and transportation principle of bucket electromagnetic vibration feeder were introduced. The amplitude-influence factors and the choice of frequency ratios were analyzed by establishing a feeder dynamic model. Analyzing the influence of amplitude on transportation method and speed, the choice principle for optimum amplitude was obtained, and provided theoretical basis for feeder parameter design.

Aiming at the electromagnetic vibrating feeder on the difficulty of adjustment in transferring different materials with it.The theories of material slide and throwing were applied in the design and adjustment.A dynamic model of the electromagnetic vibrating feeder was analyzed,and a method choosing an appropriate working point based on amplitude was put forward.On the basis of the analysis of acting forces of the material,the relationships between the amplitude and the way of material movement were mainly studied,an equation of material movement was established,and the relationships between the amplitude and the average speed of the three material-supplying ways of forward slide,opposite slide,and throwing were obtained by solution of the equation.The research results show that the amplitude of electromagnetic vibration feeder not only decides the movement ways of the material,but also has a great effect on the delivering speed.

本文根据波状螺杆的结构特征,在形体分析的基础上对波状螺杆进行参数化建模,介绍了SolidWorks波状螺杆参数化建模的过程和技术要点,探索了参数化技术在螺杆快速设计、系列设计及变形设计中的应用。

The composition of electromagnetic vibration feeder and its operational principle were introduced,a vibration differential equation was established,the vibration displacement of hopper was obtained,and then its speed and acceleration were also obtained.Analyzing force and movement of material when hopper was vibrated,the movement differential equation of material relative to feeder trough was established,and average speed of material relative to feeder trough was obtained.Analyzing several factors influencing the average speed,the optimum amplitude and vibration direction angle of material and average rising angle of feeder trough when material continuously slipped was put forward,consequently it provided design basis for the weight of electromagnetic vibration feeder,air gap and voltage of electromagnetic iron,and stiffness of prime vibration spring.

The force status of the primer vibration system of electromagnetic vibration feeder is analyzed, and the operation frequency and natural frequency of the system are deduced from vibration force modeling and the calculation of electromagnet attraction and sprint stiffness. By comparison of three operation status, proposes how to select and adjust the operation point in the present paper, which is significant to the stability of electromagnetic vibration feeder.

The macro surface wear and micro structure of a 38CrMoAlA failure screw in injection molding machine were analyzed,the existing defects in the heat-treatment were pointed out,and finally a reasonable isothermal nitriding procedure was provided.

Withthegrowing importance ofgenomics, proteomics, andthediscovery ofnewdrugs, controlled transport offluids inmicroscale becomesan important andcrucial task. Micropump, asanimportant executive device ofmicrofluidic systems, plays averyimportant role inmicroflowcontrol. Theyaredivided into twotypes that arepumpswithvalves andthose without them. Ingeneral, micropumps withvalves areeasytobe controlled, andtheir manufacture and application areripe; howeverthesizelimitation of fabrication andtheproblem ofshort operating life have alwaysbeentrouble. By comparison, thevalveless micropump isnovel inmechanism, simple instructure, and suitable forminiaturization, andtherefore, ithasbecomethe focus ofmicropump research. Thispaper gives acomparative reviewofthetwo classes ofmicropumps andsome application examples.

A new economic and simple wind energy technology is presented, this technology is considered more efficient than the fixed-speed, constant-frequency wind power generation system and more economic than the variable-speed, constant-frequency wind power generation system. The turbine with this technology can generate constant-frequency electrical power among some rotor speeds of blades.

With the growing importance of genomics, proteomics, and the discovery of new drugs, controlled transport of fluids in microscale becomes an important and crucial task. Micropump, as an important executive device of microfluidic systems, plays a very important role in micro flow control. They are divided into two types that are pumps with valves and those without them. In general, micropumps with valves are easy to be controlled, and their manufacture and application are ripe; however the size limitation of fabrication and the problem of short operating life have always been trouble. By comparison, the valveless micropump is novel in mechanism, simple in structure, and suitable for miniaturization, and therefore, it has become the focus of micropump research. This paper gives a comparative review of the two classes of micropumps and some application examples

According to the guidance thought of current higher education innovation and development,surrounding closely the background of nation builded the manufacturing and information project,cooperating actively to build the base of zhejiang advanced manufacturing,combining the construct adjusted of modern machine specialty,aiming at intercrossed and compounded and applied person with ability,shaping the training idea with the wider caliber and deeper foundation and stronger innovating consciousness,coring of digital design and manufacturing,combining mechanism technology and electron technology and information technology and management discipline to main line,standing out knowledge integration and innovation capability,emphasizing the specialty practice and knowledge to be integrated effectually,the teaching reform and practice of machine specialty is implemented to have a definite object in view.

This paper summarized the differences between two-dimensional CAD technology and three-dimensional CAD technology,the background of three-dimensional CAD technology,and the essentiality of developments from two-dimensional CAD technology to three-dimensional CAD technology.The main benefits of using three-dimensional CAD software were introduced.Finally the main purpose of this paper is helping enterprises to know and to select three-dimensional CAD software correctly according to their own application needs.

从机械科技的发展,论述了现代机械学科广泛而深刻的内涵.从专业建设和发展角度出发,提出了广义"特色学科"的概念.分析了当前海洋院校中机械学科的现状,从多个方面阐述了机械学科在海洋院校中的地位和作用.

By practising of basic labs evaluation and studying on evaluation standards, the significances and actions of basic labs evaluation are expatiated and the necessity of adding new items to current evaluation standards is presented.