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ASSESSING THE ARC--Evaluating the methods for measuring large radii

机译:评估弧度-评估测量大半径的方法

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摘要

TUBING bent to a large radius is all around us. Take a look at the handles on a new refrigerator or the trim on an automobile-chances are you will see a few large-radius bends. These bends can be formed on many types of bending machine, such as a roll bender, stretch bender, or maybe a very large wipe bender. Regardless of how they are made, it's necessary to inspect the bent tube for quality control purposes. One critical dimension to be measured is the bend radius. When it comes to tight-radius bending (a bend in which the centerline bend radius is less than 3 times the tube's diameter, or CLR < 3xD), most fabricators pay little attention to the actual numerical value of the formed radius. For example, if you bend a 1-inch tube on a 2.50-in. center-line radius, and the actual measured centerline radius is 2.54 in., would you take the time to recut the bend die? Probably not. It's much easier to make adjustments elsewhere to compensate for any radial growth.
机译:弯曲成大半径的管道就在我们周围。看看新冰箱上的把手或汽车机具上的装饰,您会看到一些大半径的弯曲。可以在许多类型的折弯机上形成这些折弯,例如辊式弯管机,拉伸弯管机,或者是非常大的擦拭弯管机。无论如何制造,都必须检查弯管以进行质量控制。要测量的一个关键尺寸是弯曲半径。当进行小半径弯曲(弯曲时,中心线弯曲半径小于管子直径的3倍,或CLR <3xD)时,大多数加工商很少注意所形成半径的实际数值。例如,如果在2.50英寸上弯曲1英寸的管。中心线半径,而实际测量的中心线半径为2.54英寸,您是否会花时间重新切割折弯模具?可能不是。在其他位置进行调整以补偿任何径向的增长要容易得多。

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