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A suitable process is offered it can make material of the quartz glass .

论述了粉碎加工方式及分级方法对硅砂晶形及粒度分布的影响,提出了一套适合制备石英玻璃原料的硅石加工工艺。

The main research content is: Using the experimental of cutting force and roughness of high speed face milling cutter and high speed end milling cutter mill aluminium alloy and cast iron, analyze the rules of the high speed milling velocity, feed rate per tooth, milling depth and milling width to high speed processing. Use multiple linear regression method, set up surface roughness and the cutting force fluctuation models. Certify the regression model notability, and provide a reliable guarantee for the accuracy of function optimization. Based on the targets of productivity, manufacturing cost, surface roughness, cutting force fluctuation optimization model, according to research of the high speed milling parameters selecting restrict of work piece, machine, tool and safety, set up high speed milling parameters multi-object optimization system.

本文以已有的高速铣削机理及高速刀具技术研究成果为基础,结合高速铣削试验,进行了基于遗传算法的高速铣削参数优化研究与系统开发,主要的研究内容为:通过高速面铣刀和高速立铣刀加工铝合金和铸铁等材料的切削力和表面粗糙度试验,进行了铣削速度、每齿进给量、铣削深度和铣削宽度对高速铣削加工过程影响的研究;采用多元线形回归的方法,建立了切削力及其振幅和表面粗糙度模型,并对模型的显著性进行验证,为高速铣削参数优化模型的建立奠定了基础。

Milling offers the additional advantage of providing methods of repetitively creating accurate parts for interchangeable manufacture.

铣加工对于精确的互换性零件的加工提供了更优越的方法。

The key technical problem of roughcast in the virtual machining environment is to handle three-dimensional shape, which includes the method of setting up geometrical model of three-dimensional shape of roughcast , the data structure that displays three-dimensional shape, process compiling three-dimensional shape, etc.

在虚拟加工环境中,毛坯的三维图形处理主要包括毛坯三维图形的几何建模方法、三维几何图形的显示数据结构和三维图形的编译处理等,提出了一种能够满足虚拟加工环境的三维图形的数据结构,给出了实现方案,实现了三维图形的环境调入和毛坯的对接等功

A saddle-shaped hole grooving machine for pressure vessel was introduced. A method for processing saddle groove and the designing of a technical background were put forward.

摘要介绍了一种压力容器壳体开孔马鞍形坡口加工机械的设计背景技术,给出了马鞍形坡口加工的一种实现方法。

Three different populations of diploid potato were employed to study chip color in this experiment. Seven different processing traits among the three populations were analyzed. According to a certain program of chip processing, all genotypes in three populations were evaluated strictly on their chip colors. The molecular markers of chip color genes were studied with the method of Bulked Segregant Analysis.

本研究选用了3个不同组合的二倍体马铃薯炸片群体材料,在群体间对7个不同的加工性状进行了比较分析,按照一定的炸片加工程序对3个群体所有单株进行了炸片颜色鉴定,并采用混合分组分析方法进行了马铃薯炸片颜色基因的RAPD标记。

How to calculate the intersection point between line and CSV is a core problem in NC machining process simulation techniques. This paper presents a noval intersection algrithm by decomposing the CSV into several simple surfaces and the intersection point is found by solving the scalar equation.

论文中针对数控加工几何仿真中存在的几个难点问题,提出了以下的处理方法: 1利用包络理论计算多轴加工中刀具运动所形成的刀具扫描体,算法精确,简单,计算量小,运算速度快。

The deformation of the slideway will reduce the precision of the installation of the machine tool,and will cause the change of the beeline and angular magnitude which can reduce the manufacturing precision of the machine tool.

机床床身导轨热变形后会破坏机床安装调试的精度,引起部件移动的直线度和角度变化而降低机床的加工精度;通过几种运用不同的方法建立导轨热变形的数学模型,能够为数控机床的编程带来方便,保证和提高工件的加工质量。

The definite purpose is to promote the processing trade competitiveness and give certain reference to the regional district.

目的在于寻求度量和比较地区加工贸易竞争力的有效方法,进以对各地区提升加工贸易竞争力起到一定的借鉴作用。

Through the comparison of the five means which can machine the twist drill flute,we have gotten that the highest precise method is grinding.

文中通过分析五种加工麻花钻螺旋槽的方法,得出了加工精度最高的是磨制法。

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And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47:5 法老对约瑟说,你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法,同时,采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。

Hey Big Raven, The individual lies dont matter anymore - its ALL a tissue of lies in support of...

嘿大乌鸦,个别谎言的事不要再-其所有的组织的谎言,在支持。