公开(公告)号：US3912151A

公开(公告)日：1975-10-14

申请号：US50661974

申请日：1974-09-16

Applicant: ALUMINUM CO OF AMERICA

Inventor： MARTIN GUY E ,  FAHNESTOCK MELVIN R ,  COUCHMAN RICHARD ,  MAHAN GUY W ,  BUNDY HUGH R ,  PAHL ROBERT C

IPC: B21C1/00 ,  B23K9/02 ,  B23K9/028 ,  B23K31/02

CPC classification number: B23K9/0282

Abstract: A method of joining the abutting ends of tubes together in a manner that provides a weld having good pulling, bending and thickness reduction capabilities. The method comprising the steps of providing the tube ends with complementary angle cuts, the angle of each cut being less than 90* with respect to the axes of the tubing; placing and maintaining the cut ends of the tubes in mating, abutting relationship, the abutting ends providing an interface therebetween that is disposed at the same angle, with respect to the tubes axes, as that of the angle cuts; disposing said interface adjacent a welding head; and welding the tubes together along the mating, abutting ends.

公开(公告)号：US3862286A

公开(公告)日：1975-01-21

申请号：US29601372

申请日：1972-10-10

Applicant: ALUMINUM CO OF AMERICA

Inventor： COUCHMAN RICHARD

IPC: B22F3/20 ,  B22F7/06

CPC classification number: B22F7/06 ,  B22F3/20

Abstract: Method of fabricating improved terminal end configurations for composite multi-metallic extrusion billets that provides a reservoir of cladding metal for the initially extrudable portions thereof by selective introduction of metal powders into discrete core and cladding cavities within a deformable shell followed by isostatic compaction thereof.

Abstract translation: 制造改进的复合多金属挤压坯料的终端构造的方法，其通过选择性地将金属粉末引入可变形壳体内的分立的芯和包层空腔中，然后进行等静压缩，从而为其初始可挤出部分提供包层金属的储存器。

公开(公告)号：US3902381A

公开(公告)日：1975-09-02

申请号：US42746173

申请日：1973-12-26

Applicant: ALUMINUM CO OF AMERICA

Inventor： COUCHMAN RICHARD

IPC: B21K5/20 ,  B23P15/24

CPC classification number: B21K5/20 ,  B23P15/24

Abstract: A forging die having an irregularly shaped cavity and a method of making the same. A cylindrical die has a calculated interference fit in a cylindrical shrink ring which is applied to it without welding or fusing, so as to prestress the material of the die, without detailed calculations of the stresses induced in the die by the ring and without making allowances for distortion of the cavity by the ring. Thereafter the irregular cavity is cut or sunk into the die. During the sinking of the cavity, stresses in the ring are partially relieved and distortion of the cavity is machined out as the machining proceeds. At such time, compressive stresses developing in the corners of the cavity will be limited by plastic deformation to the yield strength of the material. The compressive stresses remaining after the cavity is sunk provide a working stress range of about twice the range which would be available without the prestressing.

Abstract translation: 具有不规则形状的腔体的锻造模具及其制造方法。 圆柱形模具在圆柱形收缩环中具有计算的过盈配合，其在没有焊接或熔合的情况下被施加到其上，以便对模具的材料进行预应力，而没有详细计算环中在模具中引起的应力并且不给予余量 用于环形变形。 此后，将不规则腔切割或沉入模具中。 在腔体下沉期间，环中的应力被部分缓解，并且随着机械加工的进行，空腔的变形被加工出来。 在这种时候，在空腔的角落处产生的压缩应力将受到材料的屈服强度的塑性变形的限制。 空腔沉没后剩余的压缩应力提供大约是没有预应力的可用范围的两倍的工作应力范围。

公开(公告)号：US3868841A

公开(公告)日：1975-03-04

申请号：US34626473

申请日：1973-03-30

Applicant: ALUMINUM CO OF AMERICA

Inventor： COUCHMAN RICHARD

IPC: B21C23/21 ,  B21C25/08

CPC classification number: B21C25/08 ,  B21C23/217

Abstract: A method and apparatus for extruding metallic tubes or pipe of varying wall thickness so as to maintain proper tube dimensions at the time of changing from one wall thickness to another during the extrusion operation. The apparatus includes an extrusion press having a ram with a mandrel slidably mounted therein and a stationary die. The mandrel has a stepped tip which is adapted to enter an opening in the die, and the maximum diameter of the mandrel is the same as the diameter of the die opening. The ram is advanced to extrude the flowable charge while one stepped portion of the mandrel tip is disposed within the die opening, but the ram is stopped while the mandrel is moved to present a different stepped portion of its tip to the die opening. At such time, the mandrel alone is moved to extrude the flowable material, and the mandrel is moved at a speed which is the same as the speed of the material, whereby at the time of the changeover the extrusion ratio of material flow to the speed of the mandrel is maintained at unity.

Abstract translation: 一种用于挤出不同壁厚的金属管或管的方法和装置，以便在挤出操作期间在从一个壁厚变化到另一个壁厚时保持适当的管尺寸。 该设备包括具有可滑动地安装在其中的心轴和固定模具的压头的挤压机。 心轴具有适于进入模具中的开口的阶梯状末端，并且心轴的最大直径与模具开口的直径相同。 挤压机被推进以挤压可流动的料料，同时心轴尖端的一个阶梯部分设置在模具开口内，但是当心轴移动以使其顶端的不同阶梯部分到模具开口时，冲头停止。 此时，心轴单独移动以挤出可流动材料，并且心轴以与材料速度相同的速度移动，由此在将材料流的挤出比转换为速度时 心轴保持一致。