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首页> 外文期刊>The tube & pipe journal >Getting a grip
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Getting a grip

机译：抓紧时间

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摘要

Clamping is one of the key operations in the rotary draw tube bending process. The other operations are limited in their capacity to compensate for insufficient clamping. Poor clamping-that is, clamping that allows the tube to slip during bending-results in the loss of process control. Getting it right is fundamental to a sound bending process. Clamping fixes the position of the lead tangent of a tube bend so that the trailing portion of the tube is under constant tension as it is drawn through the line of tangency and formed into the arc of the bend. Secure clamping of the lead tangent to the bend die does this. If the position of the lead tangent is not fixed relative to the remainder of the tube, the bend will be formed under variations in tension. These variations, depending on the counteracting effects of the pressure die, can manifest themselves as wrinkles and even ruptures in the bend.
机译：夹紧是旋转汲取管弯曲过程中的关键操作之一。其他操作在补偿不足夹紧力方面的能力有限。夹紧不良（即，使管在弯曲过程中打滑的夹紧）会导致过程控制丢失。正确处理是声音弯曲过程的基础。夹紧可固定弯管的前切线的位置，以使弯管的尾部通过切线被拉出并形成弯管的弧形时，其尾部处于恒定张力下。将引线切线牢固地夹紧在弯曲模具上即可。如果引线切线的位置相对于管的其余部分未固定，则弯曲将在张力变化的情况下形成。这些变化取决于压模的反作用，可表现为折皱甚至弯曲处的破裂。

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