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Processing of precision double tube (phosphorus deoxidized copper tube/aluminum alloy tube) by expanding drawing

机译：扩大图纸加工精密双管（磷脱氧铜管/铝合金管）

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摘要

From the viewpoint of global environmental protection, the replacement of heavy products made of bar or plate materials by tubes processed by plastic working without deterioration of strength and rigidity, i.e., the characteristics of the former types of materials, while pursuing a light weight of the products. has attracted attention. However, to realize this, products must be manufactured precisely according to the designed values. In particular, the thickness deviation should be made as small as possible. In this study, the change of the thickness deviation was mainly examined for a phosphorous deoxidized copper tube and aluminum alloy tube subjected to precision double-tube processing by expanding drawing. Based on the experimental results. the following conclusions were obtained. 1) In order to obtain a precision double tube with small thickness deviation, a plug half-angle of 6°,13° or 20° can be used for a tube expansion rate of 5.5%. 14.7% or 18.7%. 2) Regarding the wall-thickness of the tube after double-tube processing, when the plug half-angle was constant at 20°, the wall-thickness of the inner tube (phosphorus deoxidized copper tube) decreased and that of the outer tube (aluminum alloy tube) increased for a tube expansion rate of 5.5%, 14.7% or 18.7%. 3) When the tube expansion rate in double-tube processing was 14.7%, the thickness deviation at the cladding of the inner tube (phosphorus deoxidized copper tube) decreased sharply, while that at the cladding of the outer tube (aluminum alloy tube) increased.
机译：从全球环境保护的角度来看，用塑性加工的管子代替条形或板状材料制成的重产品，而不会降低强度和刚度，即前一种材料的特性，同时又追求轻量化。产品。已引起关注。但是，要实现这一点，必须根据设计值精确地制造产品。特别地，应该使厚度偏差尽可能小。在这项研究中，主要通过扩大拉深，对经过精密双管加工的磷脱氧铜管和铝合金管的厚度偏差的变化进行了研究。根据实验结果。得到以下结论。 1）为了获得厚度偏差小的精密双管，可以使用6°，13°或20°的塞子半角，以使扩管率达到5.5％。 14.7％或18.7％。 2）关于双管加工后的管壁厚度，当塞子半角恒定在20°时，内管（磷脱氧铜管）的壁厚减小，而外管（铝合金管）的增加，使其膨胀率达到5.5％，14.7％或18.7％。 3）当双管加工的扩管率为14.7％时，内管（磷脱氧铜管）的壁厚偏差急剧减小，而外管（铝合金管）的壁厚偏差增大。 。

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