Flattening and crack phenomenon happens constantly during the process of straightening , especially on thin tube.
圆形断面材料，尤其是薄壁管，在矫直过程中经常出现压扁和压纹现象。
The surface residual stress of tube and bar after drawing straightening and annealing, under different processing conditions, were measured by means of resistance strain gauge.
用电阻应变片法测试了管棒材拉拔、矫直和退火过程中产品表面残余应力，研究了管棒材残余应力随工艺参数变化的规律。
YW42 series hydraulic straightening machine is suitable for heat treatment plant, steel plant, the use of plants for tube industry.
YW42系列液压校直机适用于：热处理厂，钢管厂，制管厂等行业使用。
The invention relates to a method for straightening steel tubes with thickened end parts, and relates to the technical field of metal tube material processing in the metallurgy industry.
一种端部加厚钢管的矫直方法，涉及冶金工业中金属管材的加工技术领 域。
The invention relates to a method for straightening steel tubes with thickened end parts, and relates to the technical field of metal tube material processing in the metallurgy industry.
一种端部加厚钢管的矫直方法，涉及冶金工业中金属管材的加工技术领 域。
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