 |
服务电话：0769-82956288
传真号码：0769-82956278
联系QQ：663900411 |
|
|
| F头计算 |
| 发布者： 发布时间：2009/12/23 阅读：41次 |
|
沉头厚度 (以下一般情况时请输入最大值) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
头径D= |
6 |
|
杆部径d= |
3 |
|
头厚H= |
1.75 |
|
c= |
0.25 |
|
|
|
|
|
|
|
|
|
|
|
|
| 根据图纸尺寸计算：tgA=((D-d)/2)/H= |
0.85714 |
|
|
上限 |
5.3 |
|
|
|
|
|
A≈ |
40.60 |
° |
|
|
下限 |
5.13 |
|
|
|
|
|
沉头度数K≈ |
81.20 |
° |
|
|
中心值 |
5.22 |
|
|
| 因c的存在，修正值为：tgA=((D-d)/2)/(H-c)= |
1 |
|
|
|
|
|
|
|
|
|
A≈ |
45.00 |
° |
|
|
|
|
|
|
|
|
|
沉头度数K≈ |
90.00 |
° |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 沉头螺丝头部厚度的测量方法 |
|
|
|
|
|
|
|
| 按JIS B 1122、JIS B 1013、GB/T-5279、ISO7721均规定沉头螺丝头部厚度的测量方法如下： |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 头部厚度是以螺纹外径的延长线与沉头斜面的交接点为起点测量的值 |
|
|
|
| 如下图头部厚度应为a，而非b。 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
| |
| |
|
|
|
