Design of Angle-changeble Supporting Block for Straightening of Light-wall Steel Tubes
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摘要: 为满足对薄壁高精度冷拔钢管的矫直精度要求,新设计出一种可以变化角度的矫直支撑块,该支撑块将传统的与钢管的平面接触改变为圆弧面接触,并可随矫直机压头压下量的不同,任意改变其与钢管接触面的角度。这种设计可使钢管在矫直过程中,与矫直支撑块的接触面积大大增加,从而有效避免因应力过度集中而造成的钢管变形。实践证明,采用此新型矫直支撑块可使钢管的矫直合格率由60%左右提高到90%以上,经济效益和生产效率都得到了明显提高。Abstract: To meet the requirement for the straightening accuracy of hi-precision light-wall steel tubes,an angle-changeble supporting-block is newly developed.With a new design,contact type of the supporting-block with the tube is changed from the conventional plane-contact into an arc surface-contact,and the angle of the contact surface with the tube can also be changed freely.Thanks to the said design,during the straightening process,the contact surface between the tube and the supporting-block is remarkably increased so as to effectively prevent possible deformation of the tube due to excessive stress concentration.Relevant operation practice shows that with the new type supporting-block,the straightening qualification rate can be enhanced from the original approxi.60% to over 90%,which would get both the economic benefit and the productivity increased obviously.
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Keywords:
- Cold-drawn steel tube /
- Straightener /
- Supporting-block /
- Design
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