| 真空吸盘的选型 |
点击这返回总目录 |
| 1、吸盘的选定 |
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| 吸盘的理论吸吊力是吸盘内的真空度p与吸盘的有效吸着面积A的乘积。 |
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| 使用n个同一直径的吸盘吸吊物体，其吸盘直径D可按下式选定。 |
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标准吸盘直径mm |
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2 |
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4 |
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| 式中: |
D--吸盘直径，mm |
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6 |
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W--吸吊物重力，N |
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8 |
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t--安全系数，水平吊，t≥4；垂直吊，t≥8。 |
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10 |
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p--吸盘内的真空度,MP。 |
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13 |
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| SETP-1 |
确认使用条件 |
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16 |
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| ① |
物体质量M |
1 |
kg = |
9.8 |
N |
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20 |
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| ② |
安全系统t |
8 |
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25 |
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| ③ |
吸盘个数n |
30 |
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32 |
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| ④ |
真空度p |
0.06 |
Mpa |
（预设） |
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40 |
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| SETP-2 |
选择大致的吸盘尺寸 |
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50 |
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| ① |
请求出吸盘直径D |
7 |
mm |
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63 |
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| ② |
根据样本选择吸盘直径D |
6 |
mm |
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80 |
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| SETP-3 |
吸吊时所需真空度 |
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100 |
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p |
0.092 |
Mpa |
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125 |
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| 2、真空发生器及真空切换阀的选定 |
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| SETP-1 |
求吸着响应时间T |
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吸着响应时间是指从供给阀（或真空切换阀）换向开始，到吸盘内达到吸着工件所必须的真空 |
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| 度为止所需的时间。 |
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供给阀(或真空切换阀)换向后，吸盘内的真空度跟达到时间的关系如下图所示 |
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| ① |
按照产品样本，预选真空发生器能提供的最大真空度为: |
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Pmax= |
88 |
Kpa= |
0.088 |
Mpa |
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p/pmax= |
1.05 |
(根据上图，查出相应时间) |
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| ② |
按上图，查得 |
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T= |
1.41 |
T1=1s |
(一般要求响应时间T≤1s) |
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| SETP-2 |
求真空发生器(或真空切换阀)的平均吸入流量 |
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设吸盘内的压力从大气压降至真空度达63%pv的到达时间为T1，降至真空度达95%pv的到达时间 |
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| 为T2,有 |
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T1=60V/Q |
T2=3T1 |
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| 式中: |
T1(或T2)--吸着响应时间，s； |
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V--真空发生器(或真空切换阀)至吸盘的配管容积，L； |
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气管 |
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d--配管的内经，mm |
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外径（mm） |
4 |
4 |
6 |
8 |
10 |
10 |
12 |
12 |
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l--配管的长得，m |
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内径（mm） |
2 |
2.5 |
4 |
6 |
7.5 |
8 |
9 |
10 |
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配管内经d |
10 |
mm |
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配管长度l |
30 |
m |
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配管容积V |
0.1 |
L |
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平均吸入流量 Q |
8.46 |
L/min |
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| SETP-3 |
求真空发生器(或真空切换阀)的最大吸入流量 |
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最大吸入流量 Qmax |
16.92 |
L/min |
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| 可以选择真空发生器的指标是： |
最大真空度能达到 |
88 |
Kpa |
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最大吸入流量能达到 |
8.46 |
L/min |
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| SETP-4 |
根据样本选择真空发生器 |
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| 真空发生器的最大吸入流量为 |
29 |
L/min |
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实际响应时间 |
0.291724138 |
s |
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| SETP-5 |
校核 |
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根据右图，连接管的有效截面积为 |
8 |
mm2 |
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通过配管的平均吸入流量为 |
37.185 |
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是否合格 |
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(合格绿色，不合格红色) |
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| 最后对于其他附件的选择就比较容易了， 以下说明 3 条基本原则， 满足即可： |
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a.供给阀的有效面积 S 不得小于真空发生器喷嘴几何面积的４倍； |
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b.真空发生器供气管内径不宜小于喷嘴直径的４倍； |
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c.真空过滤器的吸入流量应比真空发生器最大流量大. |
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