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客運汽車冷彎型鋼(GB/T6727-1986)
(表1～表4)
表1槽形型鋼的尺寸規格
H-高度A-腿長t-壁厚r-內圓弧半徑
| KQC205×70×5.5 | 205 | ±1.5 | 70 | ±20 | 5.5 | 13.965 | 17.790 |
表2方形空心型鋼的尺寸規格
A-邊長t-壁厚r-內圓弧半徑
| 代號 | 尺寸及允許偏差/mm | 理論質量/(kg/m) | 截面面積/cm2 | ||
| A | 允許偏差 | t | |||
| KQF30×30×1.5 | 30 | ±O.5 | 1.5 | 1.296 | 1.652 |
| KQF30×30×1.75 | 1.75 | 1.490 | 1.898 | ||
| KQF30×30×2.0 | 2.0 | 1.677 | 2.136 | ||
| KQF40×40×1.5 | 40 | ±0.7 | 1.5 | 1.767 | 2.252 |
| KQF40×40×1.75 | 1.75 | 2.039 | 2.598 | ||
| KQF40×40×2.0 | 2.0 | 2.305 | 2.936 | ||
| KQF50×1.5 | 50 | ±0.9 | 1.5 | 2.238 | 2.852 |
| KQF50×50×1.75 | 1.75 | 2.589 | 3.298 | ||
| KQF50×50×2.0 | 2.0 | 2.933 | 3.736 | ||
表3矩形空心型鋼的尺寸規格
| 代號 | 尺寸及允許偏差/mm | 理論質量/(kg/m) | 截面面積/cm2 | |||
| - | A | 允許偏差 | t | |||
| KQJ50×30×1.5 | 50 | 30 | ±0.9 | 1.5 | 1.767 | 2.252 |
| KQJ50×30×1.75 | 1.75 | 2.039 | 2.598 | |||
| KQJ50×30×2.O | 2.O | 2.305 | 2.936 | |||
| KQJ50×40×1.5 | 50 | 40 | 士O.9 | 1.5 | 2.O∞ | 2.552 |
| KQJ50×40×1.75 | 1.75 | 2.314 | 2.948 | |||
| KQJ50×40×2.O | 2.0 | 2.619 | 3.336 | |||
| KQJ55×25×1.5 | 55 | 25 | ±1.O | 1.5 | 1.767 | 2.252 |
| KQJ55×25×1.75 | 1.75 | 2.039 | 2.598 | |||
| KQJ55×25×2.O | 2.O | 2.305 | 2.936 | |||
| KQJ55×40×1.5 | 55 | 40 | ±1.0 | 1.5 | 2.121 | 2.702 |
| KQJ55×40×1.75 | 1.75 | 2.452 | 3.123 | |||
| KQJ50×30×1.5 | 50 | 30 | ±0.9 | 1.5 | 1.767 | 2.252 |
| KQJ55×40×2.O | 2.O | 2.776 | 3.536 | |||
| KQJ55×50×1.75 | 55 | 50 | ±1.O | 1.75 | 2.726 | 3.473 |
| KQJ55×50×2.O | 2.O | 3.090 | 3.936 | |||
| KQl80×40×2.0 | 80 | 40 | ±1.2 | 2.0 | 3.561 | 4.536 |
| KQJ80×40×2.5 | 2.5 | 4.387 | 5.589 | |||
| KQJ90×55×2.0 | 90 | 55 | 士1.2 | 2.0 | 4.346 | 5.536 |
| KlQJ90×55×2.5 | 2.5 | 5.368 | 6.839 | |||
| KIQJ95×50×2.0 | 90 | 50 | ±1.2 | 2.O | 4.346 | 5.536 |
| KQJ95×50×2.5 | 2.5 | 5.368 | 6.839 | |||
| KQJ120×50×2.5 | 120 | 50 | ±1.4 | 2.5 | 6.349 | 8.089 |
| KQJ160×60×3 | 160 | 60 | ±1.6 | 3 | 9.897 | 12.608 |
| KQJ160×60×4.5 | 160 | 60 | ±1.6 | 4.5 | 14.497 | 18.468 |
| KQJl80×65×4.5 | 180 | 65 | ±1.8 | 16.263 | 20.718 | |
表4彎曲角的內圓弧半徑
| 選用鋼種 | 內圓弧半徑r/mm | 選用鋼種 | 內圓弧半徑r/mm | ||
| t≤4 | 4≤t≤8 | t≤4 | 4≤t≤8 | ||
| 普通碳素結構鋼 | ≤1.5t | ≤2.0t | 低合金結構鋼 | ≤2.0t | ≤2.5t |
注：彎曲角度應呈90°，其允許偏差不得大于±1.5°。
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