U型钣金冷弯成型机
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DOA2?DOB2?221mm
折弯角度?2?43.0? 计算上辊扎的圆角半径R：
R?180?L2??2?kt?180??2.355?0.35?2?2.44mm
3.14?43??2.44?tan43??0.96mm
22?43?m?(R?t)?tan2?(2.44?2)?tan?1.75mm
22?n?R?tan?2b?L3?2m?94.4?2?1.75?97.9mm
b3?(L1?m)cos?2?5?(47.2?1.75)?cos43??5?40.8mm
a?L3?2n?94.4?2?0.96?96.32mm
D7?DOA2?2b3tan?2?221?2?40.8?tan43??297.09mm
D6?(DOA2?DOB2)?D7?20?(221?221)?297.09?20?124.91mmd?DOA2?D6221?124.91??51.52mm
2tan?22?tan43?
具体尺寸分布如图4-11：
U型钣金冷弯成型机
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图4-11第二道次轧辊尺寸图
4.4.3第三道次轧辊尺寸计算 第三道工作辊的驱动半径为：
DOA3?DOB3?221.5mm
折弯角度?3?61.1? 计算上辊扎的圆角半径R：
R?180?L2??3?kt?180??2.355?0.35?2?1.51mm
3.14?61.1??1.51?tan61.1??0.89mm
22?61.1?m?(R?t)?tan3?(1.51?2)?tan?2.07mm
22?n?R?tan?3b?L3?2m?94.4?2?2.07?98.54mm
b3?(L1?m)cos?3?(47.2?2.07)?cos61.1??5?28.81mm
a?L3?2n?94.4?2?0.89?96.18mm
U型钣金冷弯成型机
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D7?DOA3?2b3tan?3?221.5?2?11.58?tan61.1??325.88mmD7?DOA3?2b3tan?3?221.5?2?11.58?tan61.1??325.88mm
D6?(DOA3?DOB3)?D7?20?(221.5?221.5)?325.88?20?97.12mmd?DOA3?D6221.5?97.12??34.33mm
2tan?32?tan61.1?
具体尺寸分布如图4-12：
图4-12第三道次轧辊尺寸图
4.4.4第四道次轧辊尺寸计算
第四道工作辊的驱动半径为：
DOA4?DOB4?222mm
折弯角度?4?76.5? 计算上辊扎的圆角半径R：
R?
180?L2??3?kt?180??2.355?0.35?2?1.06mm
3.14?76.5?U型钣金冷弯成型机
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76.5??0.84mm
22?76.5?m?(R?t)?tan4?(1.06?2)?tan?2.41mm
22?n?R?tan?1.06?tan?4b?L3?2m?94.4?2?2.41?99.22mm
b3?(L1?m)cos?4?(47.2?2.41)?cos76.5??11.58mm
a?L3?2n?94.4?2?0.84?96.08mm
D7?DOA4?2b3tan?4?222?2?11.58?tan76.5??318.47mm
D6?(DOA4?DOB4)?D7?20?(222?222)?318.47?20?105.53mmd?DOA4?D6222?105.53??13.98mm
2tan?42?tan76.5?
具体尺寸分布如图4-13：
图4-13第四道次轧辊尺寸图
4.4.5第五道次轧辊尺寸计算 第五道工作辊的驱动半径为：
DOA5?DOB5?222.5mm
U型钣金冷弯成型机
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折弯角度?6?87.6? 计算上辊扎的圆角半径R：
R?180?L2??3?kt?180??2.355?0.35?2?0.84mm
3.14?87.6??1.06?tan87.6??0.81mm
22?87.6?m?(R?t)?tan5?(0.84?2)?tan?2.69mm
22?n?R?tan?5b?L3?2m?94.4?2?2.69?99.78mm
b3?(L1?m)cos?5?5?(47.2?2.69)?cos87.6??2.09mm
a?L3?2n?94.4?2?0.81?96.02mm
D7?DOA5?2b3tan?5?222.5?2?2.09?tan87.6??322.23mm
D6?(DOA5?DOB5)?D7?20?(222.5?222.5)?322.23?20?102.77mmd?DOA5?D6222.5?102.77??2.51mm
2tan?52?tan87.6?
具体尺寸分布如图4-14：