Wednesday, April 10, 2024
相对弯曲半径r/t大,则表示该变形区中()。A、回弹减小B、弹性区域大C、塑性区域大D、塑性区域小...
Wednesday, May 8, 2024
相对弯曲半径r/t大,则表示该变形区中()。A、回弹减小B、弹性区域大C、塑性区域大D、塑性区域小...
Saturday, April 20, 2024
Wednesday, April 10, 2024
Wednesday, May 8, 2024
Wednesday, May 8, 2024
Saturday, April 20, 2024
由于胀形时坯料处于双向受拉的应力状态,所以变形区的材料不会产生失稳现象,成形以后的冲件表面光滑、质量好。...
Wednesday, January 10, 2024
Wednesday, May 8, 2024
Wednesday, May 8, 2024
为了提高弯曲极限变形程度,对于较厚材料的弯曲,常采用()。A、清除毛刺后弯曲B、热处理后弯曲C、加热D、增加外力...
Saturday, April 20, 2024
冲裁排样按照材料经济利用程度来分是()。A、废料排样、少废料排样和无废料排样B、废料排样、直排法、斜排法C、直排法、斜排法、对排法D、混合排法、多排法和冲裁搭边法...
Wednesday, May 8, 2024
弯曲件的最小弯曲半径不宜大于最小弯曲半径,否则会造成变形区外层材料的破裂。...
Saturday, April 20, 2024
CAD/CAM技术的发展趋势主要是集成化、微型化、智能化。...
Wednesday, April 10, 2024
冲裁间隙过小时,冲裁件断面上出现较大的断裂带,使光亮带变小,毛刺和锥度较大,塌角有所增加,断面质量更差。...
Thursday, December 28, 2023
CAD/CAM技术的发展趋势主要是集成化、微型化、智能化。...
Wednesday, April 10, 2024
LINE是()绘制命令?A、多段线B、直线C、椭圆D、射线...
Wednesday, May 8, 2024
Wednesday, May 8, 2024
Wednesday, May 8, 2024
在弯曲变形区内,内缘金属的应力状态因受压而缩短,外缘金属受拉而伸长。...
Saturday, February 10, 2024