论刚性电引火药头技术的优势

文章通过对刚性药头和弹性药头两种结构工业电雷管引火元件的质量、生产工艺等方面的比较,介绍刚性电引火药头技术的优点和在国内民爆器材行业中的应用及发展前景。     

用苦味酸钾制造电引火元件

现在普遍使用的工业电雷管的发火可靠性和一致性并不理想,并带来安全隐患和环境污染,原因之一是采用KClO3-C-DDNP系列引火药剂制造电引火元件.通过理论分析对比和部分试验论证,从感度、安全性、燃烧精度、安定性、产品性能等方面,探讨研究了将苦味酸钾用于电引火元件的引火药剂可行性.结果表明在电引火元件制造中,采用苦味酸钾作为引火药剂的主要组分,具有热稳定性好,发火可靠性和一致性高,药头机械强度高、生产过程废品少,无环境污染的优点,在保证和控制产品质量、改善生产和使用的安全性、环境保护等方面都有明显改进,对提高电雷管的发火可靠性和一致性有利.     

铅丹-硅系电引火药头的研究

文中介绍了铅丹．硅系电引火药头的配方,通过试验对氯酸钾．木炭系电引火药头和铅丹一硅系电引火药头性能进行了对比分析。经试验和批量生产表明,铅丹．硅系引火药头性能优良,质量稳定可靠,发火同步性好。秒量精度高,安全系数高。用该引火药头装配的电雷管,产品质量达到了GB8031《工业电雷管》标准规定的要求。     

浅析桥丝沾锡珠对电雷管发火的影响

浅析桥丝沾锡珠对电雷管发火的影响１引言电引火头是电雷管引爆的初始元件，其中桥丝是将电能转化为热能的关键元件。焊桥丝质量的好坏直接影响电引火头的发人性能，进而影响电雷管的发火。为了保证串联起爆的齐发性好，生产中一般要求桥丝电阻值控制在一定范围。可是由于...     

国内外工业电雷管结构及引火药头部件的对比

文章主要对西欧工业发达国家的刚性化电雷管结构、引火药头部件和弹性化电雷管结构、引火药头部件进行对比分析,介绍了威力化工的刚性电雷管结构以及引火药头部件的特点.威力化工的刚性化电雷管技术有较高的自动化程度,生产成本低.     

论电引火元件对雷管质量的影响

文章着重论述了刚性电引火元件对雷管产品质量的影响,并分析了其原因,还详细阐述了提高刚性电引火元件质量要抓的5个环节.就今后刚性电引火元件的生产改进提出了自己的看法.     

电雷管桥丝沾硝棉漆能保证产品发火的一致性

目前,我国工业电雷管的引火元件大都是金属桥丝灼热式电引火头,也就是使用康铜丝或镍铬丝作为桥丝,桥丝外面沾(涂)有引火药头。这种结构的电引火元件,往往     

刚性电引火元件药球头部位生锈问题探讨

刚性电引火元件具有质量高,生产劳动强度低,实现机械半自动化生产等优势,现在是全国广泛的推广先进技术。我分公司引进该条生产线后由于没有掌握这条生产线的特性,出现过钢带锈蚀质量问题。结合3年来对刚性电引火元件实验、生产所掌握的情况对导致生锈的原因进行分析探讨。     

DCQH-9718多功能储能式桥丝自动焊接机及其应用

文章介绍一种适合于我国工业电雷管弹性引火元件桥丝自动焊接设备的工作原理,特点及其在生产中的应用,它的应用简化了工业电雷管引火元件制造工艺,改变了雷管桥丝焊接方式,对推动我国工业电雷管生产自动化进程具有一定的意义。     

一种新型复合电引火药头在秒延期电雷管生产中的应用

文中通过对木炭系，硫氰酸铅系电引火头的性能对比分析，提出了研制开发新型复合电引火区头的设想，并经过论证，试验，批量生产，证明这种新型复合电引火药头性能优良，质量稳定，用该药头装配成的秒延期电雷管，其性能完全达到ＧＢ８０３１《工业电雷管》标准的规定的要求。     

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.……     

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.     

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.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to