JB/T 8004.1-1999 机床夹具零件及部件 带肩六角螺母
作者:标准资料网 时间:2024-05-04 03:25:27 浏览:9105
来源:标准资料网
基本信息
| 标准名称： | 机床夹具零件及部件 带肩六角螺母 |
| 英文名称： | The parts and units of jigs and fixtures - Hexagon nut with shoulder |
| 中标分类： |
机械 >>
工艺装备 >>
一般卡具 |
| ICS分类： |
综合、术语学、标准化、文献 >>
词汇 >>
电气工程 (词汇)
|
| 替代情况： | JB/T 8004.1-1995(原标准号GB/T 2148-1991) |
| 发布部门： | 机械科学研究院 |
| 发布日期： | 1999-08-06 |
| 实施日期： | 2000-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 归口单位： | 机械科学研究院 |
| 出版日期： | 1900-01-01 |
| 页数： | 2 页 |
| 批文号： | 国机管[1999]433号 |
适用范围
JB/T 8004.1-1999 本标准是对 JB/T 8004.1-95《机床夹具零件及部件 带肩六角螺母》的修订，修订时仅按有关规定作了编辑性修改，技术内容没有改变。 本标准规定了普通螺纹规格为 M5～M48、细牙螺纹规格为 M8×M48×1.5 的带肩六角螺母。 本标准于 1981 年以 GB 2148-80 首次发布，于 1991年 4 月 30 日第一次修订为 GB/T 2148-91，于 1996 年 4 调整为 JB/T 8004.1-95。
前言
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目录
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引用标准
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所属分类： 机械 工艺装备 一般卡具 综合 术语学 标准化 文献 词汇 电气工程 (词汇)
【英文标准名称】:PreparingPlasticFilmSpecimensforaRound-RobinStudy
【原文标准名称】:循环研究用塑料薄膜样品的制备
【标准号】:ASTMD4204-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:试样;工艺;塑料;准备;箔
【英文主题词】:processes;foil;testspecimens;preparation;plastics
【摘要】:
【中国标准分类号】:G31
【国际标准分类号】:83_140
【页数】:
【正文语种】:英语
Product Code:SAE JA1000/1
Title:Reliability Program Standard Implementation Guide
Issuing Committee:G-11r, Reliability Committee
Scope:The importance of reliability in design engineering has significantly grown since the early Sixties. Competition has been a primary driver in this growth. The three realities of competition today are: world class quality and reliability, cost-effectiveness, and fast time-to-market. Formerly, companies could effectively compete if they could achieve at least two of these features in their products and product development processes, often at the expense of the third. However, customers today, whether military, aerospace, or commercial, have been sensitized to a higher level of expectation and demand products that are highly reliable, yet affordable. Product development practices are shifting in response to this higher level of expectation. Today, there is seldom time, or necessary resources to extensively test, analyze, and fix to achieve high quality and reliability. It is also true that the rapid growth in technology prevents the accumulation of historical data on the field performance of their products. Unfortunately, some reliability methods have depended upon the availability of historical data, other experiential information, or learning through extensive and time consuming tests. Unfortunately, some reliability methods have depended upon the availability of historical data, other experiential information, or learning through extensive and time consuming tests.To enable this transition, reliability efforts must be directed toward anticipating problems and designing-in features that assure the achievement of quality and reliability, concurrent with the development process, instead of trying to assess quality and reliability downstream. The gains in time-to-market and cost savings from such an approach can be significant. More recent reliability programs tend not to prescribe reliability tasks or methods to be performed by suppliers. Rather, suppliers are considered equal partners in the effort to produce a reliable product and work with the companies in deciding which reliability methods provide most value in achieving objectives.Nevertheless, developing reliable products and achieving reliability goals often requires different approaches for various product sectors. For example, in the defense/aerospace sector, the number of customers is relatively small. The product development cycle may span several years, while the product life cycle may last from mere minutes to as long as decades. Furthermore, it is not unusual for several design iterations of technologically different hardware and software to be developed before the final version is incorporated into the production product. Production volumes may range from rates of less than ten to hundreds per year. Also, the reliability discipline in this sector is generally a separate activity from the design discipline. The commercial sector, in contrast to the defense/aerospace sector, usually has a higher number of different customers. Development cycles could range from months to a few years while life cycles are often measured in years. Production volumes may run up to thousands per day. The reliability discipline is treated usually as an integral part of the up-front design process rather than a separate activity. Thus, developing a reliability implementation guide to meet the needs of all industry sectors is a formidable challenge. It recognized that this Guide will not strictly apply to all situations or industries. The suggestions made in this Guide must be interpreted in the context of the industry, its accepted practices, and unique company policies. This point cannot be overemphasized and this document does not attempt to prescribe any given method or set of methods. There is no right answer that will apply across the board to every organization or every product development. Suppliers and customers need to determine which methods are most applicable to their specific product developments."
