九十度弯头放样怎么放

2024-12-29 08:12:28
推荐回答(5个)
回答1:

                任意度数弯头料展开计算

【放样】

    是将一个二维形体对象作为沿某个路径的剖面,而形成复杂的三维对象。同一路径上可在不同的段给予不同的形体。我们可以利用放样来实现很多复杂模型的构建。工程上用于把图纸上的方案“搬挪”到实际现场。

回答2:

九十度的弯头放样
还有比这复杂的展开放样
都能用这软件
钢构CAD
几秒钟内就可以轻松自动化展开放样整体出下料图
三通大小头天圆地方
都可以

回答3:

这个简单

手机上都是弯的放样程序

还免费

NALS

回答4:

目前90度弯头在弯头是十分的常见,所以,在进行制图时,90度弯头放样是很多人寻问的问题,只有了解这些知识,才能更好的处于问题,所以,我们将为大家讲解90度弯头放样的步骤,另外,弯头的规格及尺寸也是有严格的要求的,可望而了解这样,才能了解学习更多的弯头知识。 

90度弯头放样步骤:
1、弯度90度,直径300MM,是这样下料:划一根直线长为∏(d-t),其中d为圆管外径,t为板厚。
2、把该线段16等分,两节等径直角弯头放样计算式:Yn=r cosα,当0°≤αn≤90°时,Yn=1/2(d-2t)cosα;当90°<αn≤180°时,Yn=1/2dcosα。
3、弯头放样计算式中Yn——展开图圆周长度等分点至曲线坐标值,r---辅助圆半径,d---圆管外径,t---板厚,αn---辅助圆周等分角度、直径为300mm的管。
4、n可选16α1=360°/16=22.5°α2=45°α3=67.5°α4=90°α5=112.5°α6=135°α7=157.5°α8=180°
5、弯头放样计算式:Y0=1/2(d-2t)cos0°=0.5(d-2t)
Y1=1/2(d-2t)cos22.5°=0.4619(d-2t)
Y2=1/2(d-2t)cos45°=0.3536(d-2t)
Y3=1/2(d-2t)cos67.5°=0.1913(d-2t)
Y4=1/2(d-2t)cos90°=0
Y5=1/2 dcos112.5°=-0.1913d
Y6=1/2 dcos135°=-0.3536d
Y7=1/2 dcos157.5°=-0.4619d
Y8=1/2 dcos180°=-0.5d
6、因为弯头放样式中Y0为正值,在XX轴0处是向上0.5(d-2t),Y1-Y3都是向上,Y4是0正好在X轴,而Y5-Y8为负值,因此向下作线段。
7、然而把这九个点连接起来,出现二个曲线,这是一半,另一半与其相同。这样做出的样板是90度弯头的一半。
弯头规格尺寸及标准:
1、在管道支路上弯头可以作为改变方向的一种管件,常见的弯头采用材质为碳钢、合金、不锈钢、低温钢、高性能钢、铸钢、ASTM/ASME、ASTM/ASME,而卫生级弯头可以用于饮料、食品、乳品行业,所以必须采用达到卫生标准的不锈钢材料来制作,标准弯头角度分为90°(90度长弯头或90度短弯头)、45°(等径弯头或异径弯头)、180°弯头及非标弯头等,依据现代生产工艺为焊接、冲压、推制、铸造弯头。
2、卫生级弯头标准有国标:(GB/T12459-2005、GB/T13401-2005、GB/T14383、GB/T17185-1995)电标(GB2000、DL/T515-93、D-GD87-1101)化标(HGJ514、HGJ528、HGJ10、HGJ529、HGJ-44-76-91、HG20592-20635)船标(GB/T10752-1995、CB/T3590-94)中石油标准(SY/T0510-1998、SY/T5257-2004、02S403)、中石化标准(SH3406 -1996、SH3408 -1996、SH3409-1996、SH3410 -1996、SH3065-1994)、美标(ASME/ANSI B16.9、ASME/ANSI B16.11、ASME/ANSI B16.28、ASME B16.5、MSS SP-43、MSS SP-79、MSS SP-83、MSS SP-97)日标(JIS B2311、JIS B2312、JIS B2313、JIS B2316)。
通过上文的介绍,相信大家对于弯头的尺寸规格有了更进一步的了解一般来说,弯头的尺寸规格都是有严格规定的,这一点一定要事先去了解,另外,90度弯头放样也不可盲目的操作,对于不了解操作的,可以采用上文所说的方法,希望能给大家带来帮助。

回答5:

板金展开图样一般都采用相贯线法放样,没有计算公式.制图软件绘制比较方便.多节的弯头叫作“虾米腰”.手工放样步骤:(以一节为例,其余方法相同)1)先按实际尺寸画出弯头侧面投影.包括接缝线.2)按线把每一个封闭线框图形分割成独立的图形.(可以裁剪,也可以单独再画.3)取一个图样,(将中心线垂直的设置)画在另一张纸上,沿图样高度画两条上下平行的横线,并与中心线垂直,长度正好是图样直径的圆周长.(封闭的长方形)4)将图样垂直方向作等分,并作好标记,然后将这些等分线垂直的画到刚才画的展开的长方形内,注意展开图上的点一定要对应投影图样上的点.5)将图样上斜线沿水平方向作等分.并平行的拉到展开的图样上,并对应相应的点.把展开样上得到的交点圆滑连接,就是展开的曲线.等分作的越密,曲线越准.6)放出咬口的量,和板厚处理.弯头下料必须知道弯曲半径,厚度、几节.

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