机电一体化技术在机械制造业的发展及应用

机械制造业的快速发展很大程度上依赖机电一体化技术的发展,机电一体化技术是机械制造业发展的技术基础。有了技术的支持,机械制造业的发展才是有的放矢,其目标和方向更为明确。本文开始论述了机电一体化技术的主要内容和在机械制造业的发展概况,然后分析了几个主要机电一体化技术在机械制造业的应用,和大家共同探讨,最后提出期望。     

刍议机电一体化的发展趋势

机电一体化发展趋势越来越明显,机电一体化技术对于改变整个机械制造业面貌所起的重要作用,本文就机电一体化的发展背景,提出机电一体化发展趋势。     

机电一体化发展与对策

自从电子技术与机械技术的结合后,机电一体化进程就开始逐渐加快了。机电一体化又称机械电子学,英语称为Mechatroni CS,它是由英文机械学Mechanics的前半部分与电子学E1ectronics的后半部分组合而成。机电一体化最早出现在1971年日本杂志《机械设计》的副刊上,随着机电一体化技术的快速发展,机电一体化的概念被我们广泛接受和普遍应用。随着计算机技术的迅猛发展和广泛应用,机电一体化技术获得前所未有的发展。现在的机电一体化技术,是机械和微电子技术紧密集合的一门技术,他的发展使冷冰冰的机器有了人性化,智能化。     

机电一体化技术支撑食品包装机械“绿”赢天下

我国食品包装机械制造正经历着重要的转变,食品包装机械正朝着高速、多功能化及机电一体自动化的方向发展,以适应市场的需求。针对食品生产机械追求包装加工机电一体化,研究了食品包装机械机电一体化的应用,介绍了机电一体化技术支撑食品包装机械的自动化、高效率化、节能化,同时指出了食品包装机械产业未来机电一体化发展的新趋势。     

机电一体化的应用及其发展方向

机电一体化技术是机械技术与微电子技术、信息技术互相渗透的产物,是机电工业发展的必然趋势。文章简述了机电一体化技术的主要应用领域及其发展趋势。     

论机电一体化技术及其发展

机电一体化是一种复合技术,是机械技术与微电子技术、信息技术互相渗透的产物,是机电工业发展的必然趋势。简述了机电一体化技术的基本结构组成及其发展情况。     

宁夏机电行业企业人才规格需求调查分析

20世纪90年代后期，开始了机电一体化技术向智能化方向迈进的新阶段，机电一体化进入深入发展时期。机电一体化技术广泛应用于国民经济的各个领域，并渗透到家庭日常生活用品中，机电一体化的专业人才供不应求。在近几年宁夏的用工市场中的信息可知，每一个单位都需要有机电产品的修理和维护的专业技术人员。所以结合我区经济发展现状，对机电一体化技术的专业人才需求进行了广泛地社会调研。     

机电一体化在矿山机械中的应用

现代机械设备已不是一个单纯的机械产品,而是机电一体化的集成产品,机电一体化技术的发展对机械制造模式及机械产品产生深刻的影响,同时,机械制造模式及机械产品也对机电液一体化技术提出更高的要求,机电一体化技术的历史沿革及我国发展现状工程机械液压系统的特点就是输出的力矩和功率大,而这依赖于高压系统,随着大型、特大型工程机械和矿山机械的出现,继续向高压发展是液压系统发展的一个趋势。     

论机电一体化与应用

机电一体化是机械技术与微电子技术、信息技术互相渗透的产物,是机电工业发展的必然趋势。随着微电子技术信息技术的迅速发展以及科学技术日益走向整体化、交叉化和数字化,机电一体化技术的应用也越来越广泛。本文简述了机电一体化技术的基本功能和主要应用领域,供参考。     

机电一体化技术的应用与发展前景

机电一体化是一种复合技术,是机械技术与微电子技术、信息技术互相渗透的产物,是机电工业发展的必然趋势。文章简述了机电一体化技术的基本结构组成和主要应用领域,并指出其发展趋势。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...