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圆弧     
相关语句
  arc
    ERROR ANYLASIS OF TWIN DDA ALGORITHM FOR ARC INTERPOLATION
    双DDA圆弧插补公式误差分析
短句来源
    An Algorithm of Practical Arc Approach
    实用圆弧逼近算法
短句来源
    Design if Hobs for Machining Arc Planet Gears
    加工圆弧行星轮的滚刀设计
短句来源
    A Study on Hobbing Outline of New Type ARC Toothed Belt Pulley
    新型平顶圆弧齿同步带带轮滚刀齿廓的研究
短句来源
    A BECOMMENDED METHOD OE DOUBLE ARC ELLIPSE PASS DESIGN
    双圆弧椭圆孔型设计的新方法
短句来源
更多       
  circular arc
    The Application of the Least Square Metbod by Using Circular Arc in Circular Figure Analysis
    最小二乘圆弧法在圆图象分析中的应用
短句来源
    Analysis of the Finishing for the Outside of the ConnectingRods the Circular Arc
    连杆外圆弧表面精加工技术分析
短句来源
    Feasibility Studies on the Machining of Duplex Circular Arc Gears on Hobber
    滚齿机加工双向圆弧齿轮的可行性研究
短句来源
    Discussion on Circular Arc Programming about CNC Lathe Sinumerik-802s
    关于数控车床Sinumerik-802s系统圆弧编程探讨
短句来源
    The Scissors Iteration Method for Intersection between NURBS and Circular Arc
    NURBS曲线与圆弧求交的剪刀迭代法
短句来源
更多       
  the arc
    Methods for Measuring the Arc Radius of Cutter Point & Machining Accuracy Problems in CNC Programming
    CNC编程中刀尖圆弧半径的测量方法和加工精度
短句来源
    Parameter equations of the end section curve for front blade of standard twist drills and the arc instead of the end section curve are established.
    建立了普通麻花钻前刀面端截面曲线和用圆弧代替端截面曲线的参数方程,通过改变钻头结构参数,对用圆弧代替前刀面端截面曲线进行误差分析,进一步建立了三圆弧螺旋槽径向截形的数学模型;
短句来源
    (2)For the gear with the module m≤12,the arc gear cutter hob of same module is used for machining;
    (2 )模数m≤12的齿轮用同模数圆弧滚刀加工 ;
短句来源
    To Analyse the Method of Symbol Distinguish when the Arc TrackInsert Pass Through Guadrant with the Method of Comparing Spot by Spot
    逐点比较圆弧轨迹插补在过象限时用符号判别法的分析
短句来源
    NC Dresser on Which the Dressing Tool Can Turn Around the Arc Center
    修整工具能绕刃口圆弧圆心转动的数控砂轮修整器
短句来源
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  round arc
    The metal of the right angle isnt enough used of hot rolled equal and unequal angle steel Mean while,the right angle is easy producing stress concentration and difficult rolling Therefore,the section of angle steel was optimized,and a new section of round arc angle steel is put forward,which can be easily rolled,used and saved metal material over 5%
    热轧等边、不等边角钢直角处金属未被充分利用 ,易产生应力集中 ,且轧制难度大 ,因而对其断面进行了优化设计 ,提出一种新型圆弧角钢 ,其轧制容易 ,使用方便 ,可节约金属材料 5 %以上
短句来源

 

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  arc
Let Γ be a smooth compact convex planar curve with arc length dm and let dσ=ψ dm where ψ is a cutoff function.
      
The circulant digraphDCn(S) is a directed graph with vertex setZn and arc set {(i,i+s): i ∈ Zn, s ∈ S}.
      
ThenCn(S) is arc-transitive if and only if Xoacts transitively onS.
      
A packing of the complete directed symmetric graph DKv with m-circuits, denoted by (v,m)-DCP, is defined to be a family of arc-disjoint m-circuits of DKv such that any one arc of DKv occurs in at most one m-circuit.
      
It is proved that there is no chaotic group actions on any topological space with free arc.
      
更多          
  circular arc
In [3], a study was made of the generation and propagation of a wave from a bow front in the form of a circular arc.
      
Effect of non-equilibrium condensation of moist air on unsteady behaviour of shock waves around a circular arc blade
      
In the present study, the effect of non-equilibrium condensation of moist air on the self-excited shock wave oscillation on a circular arc blade was investigated numerically.
      
We consider a potential energy trough centered along a circular arc of radiusR.
      
We consider a problem for the Laplace equation in a circular sector wherein heat exchange takes place on the sides of the sector in accordance with Newton's law and a temperature distribution is specified on the circular arc.
      
更多          
  the arc
During welding, the separate distribution of slag on the weld pool results in the great constriction of arc spots, an increase in arc spot force, and an increase in Lorentz force within the arc and weld pool.
      
For flow around the arc of a parabola, with fully developed and partial cavitation, convenient finite formulas are obtained and numerical calculations are made.
      
The effect of conditions in the initial cross section of the calculation region of the arc on its characteristics is investigated and a numerical analysis of the heating and acceleration of conducting gas is carried out.
      
A study is made of the problem of a point electric source in a homogeneous gas stream and operating in the arc discharge regime.
      
Expressions are obtained for the temperature fields, the thickness of the arc, the current-voltage characteristics, and the power in the arc.
      
更多          
  其他


Specimens of A-cast high-C high-Cr tool steel were compressed along two perpendicular directions. Result of metallographic examination shows that there are two aspects to the breakdown of eutectic carbide structure: scattering of eutectic carbide network and breaking down of carbide particles. To break down the eutectic carbide network of A-cast structure with grain size 4-5 grade, tensile strain of 60% is needed. When the specimen is alternately deformed along two perpendicular directions, carbide particles...

Specimens of A-cast high-C high-Cr tool steel were compressed along two perpendicular directions. Result of metallographic examination shows that there are two aspects to the breakdown of eutectic carbide structure: scattering of eutectic carbide network and breaking down of carbide particles. To break down the eutectic carbide network of A-cast structure with grain size 4-5 grade, tensile strain of 60% is needed. When the specimen is alternately deformed along two perpendicular directions, carbide particles are smaller and more evenly distributed. Small ingots were drawn out into billets with various operations. The result shows that when cross sectional area of the ingot is reduced to one-tenth, eutectic carbide network beging to scatter. When cross-sectional area is reduced to one four teenth, carbide particles distribute somewhat like bands. When ingots were drawn out with flattening of breadth and height ratio more than 2 and flattening alternately on two perpendicular sides more than 3 times, the breakdown of eutectic carbide structure is more complete than that without flattening, especially in the central part.' Meanwhile there appears no band structure when ratio of reduction area is large. When ingot is upset at first, then drawn out with flattening, it is the most effective forging process to break down eutectic carbide structure. Result of impact testing with circular-arc notch shows that impact value of forged billet is closely related to the stages of breakdown of eutectic carbide structure. Hence it is suitable for evaluating the mechanical property of tool steels.

将铸态高铬模具钢试样经不同方向的反复变形试验后,结果表明共晶炭化物组织的破碎过程包括网状组织的分散和片状炭化物颗粒的折断两个方面。当铸志晶粒度力4~5级寸,破碎晶炭化物组织需要有60%以上的拉应变。不同方向的反复变形使网状组织分散得更好,炭化物颗粒断裂得更细小。 用不同方法将高铭模具钢小钢锭锻成钢材的试验指出,当锻比大于10时,网状共晶炭化物组织已经破碎,锻比大于14,会出现带状分布。采用走扁方的引伸,如扁方度大于2,不同方向的走扁方次数在三次以上时,和不走扁方的一般引伸方法比较,钢材达到同样的共晶炭化物破碎程度时锻比可以小些,中心部位破碎得较好。同时当锻比较大时,不出现带状组织。如将钢锭先经过墩粗,压下量大于50%,然后再用走扁方引伸成钢材,这是破碎共晶炭化物组织最有效的锻造方法。 用带圆弧缺口的冲击试验结果表明冲击值和钢材的共晶炭化物组织破碎程度有密切关系,可以作为性能指标。

This paper analyses and calculates the geometric parameters of the double arc ball slide.It provides the basis for parameter design, the method of reasonable design of parameter tolerances and also introducs the manufacturing technology of the slide.

本文对双圆弧截面滚珠导轨的几何参数进行了分析和计算。提供了参数设计的依据 和参数公差的合理制订方法。介绍了导轨的制造工艺。

The error in the X-ray stress measurement caused by the side declining angle, γ,

探讨了计数管扫描平面侧向倾角γ对X射线应力测量值的影响。该倾角所造成的应力测量值误差为: Δσ_X=-(σ_YSin~2γ+τ_(XY)sinγΣD_i sin2ψ_i)式中D_i=(Σsin~2ψ_i-nsin~2ψ_i)/(Σsin~2Ψ_i)~2-nΣsin~4ψ_i (n为ψ的个数) 对误差公式进行了试验验证,并利用该公式讨论了圆弧表面的轴向应力测量误差和某些X射线受到遮挡情况下的应力测定问题。

 
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