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1. 发明授权

US06779375B1 Method and apparatus for producing tubes and hollow shafts 有权
标题翻译：用于生产管和空心轴的方法和装置
公开(公告)号：US06779375B1
公开(公告)日：2004-08-24
申请号：US10397651
申请日：2003-03-26
申请人： Randall L. Alexoff
发明人： Randall L. Alexoff
IPC分类号： B21C122
CPC分类号： B21C37/16 , B21C1/24 , B21C1/28
摘要： A method and apparatus for producing an end connection by which a tube of variable wall thickness can be formed by being drawn between a die and a mandrel. The end of tubular stock is reduced and its wall thickness increased by being extruded into the space between a reducing die and a mandrel located within the tube, the mandrel having a plug that forms the inner surface of the formed tube as the mandrel and die are retraced from the end. A screw thread is formed on the inner surface of the formed tube and is engaged by a screw thread on a pull pin adapted for attachment to an actuating cylinder that applies a force tending to pull the tube through the die and mandrel.
摘要翻译：一种用于制造端部连接的方法和装置，通过该端部连接可以通过在模具和心轴之间拉伸而形成可变壁厚度的管。管状原料的末端减少，并且其壁厚通过挤压到位于管内的还原模和心轴之间的空间中而增加，心轴具有形成作为心轴和模具的成形管的内表面的塞子从最后回溯。在成形管的内表面上形成螺纹，并且通过螺纹接合在适于附接到致动缸的拉销上，该螺纹施加倾向于将管拉出模具和心轴的力。

2. 发明授权

US4616500A Method for producing tubing of varying wall thickness 失效
标题翻译：生产不同壁厚管材的方法
公开(公告)号：US4616500A
公开(公告)日：1986-10-14
申请号：US704755
申请日：1985-02-25
申请人： Randall L. Alexoff
发明人： Randall L. Alexoff
IPC分类号： B21C1/24 , B21C37/16
CPC分类号： B21C1/24 , B21C37/16
摘要： A method for producing tubing of variable wall thickness, and particularly for producing double-butted tubing, wherein the wall thickness or gage at the ends of the tube is greater than that in the intermediate portion of the tube. This is accomplished by threading the tube over a mandrel, usually having a removable plug at one end thereof, until a portion of the plug passes through a necked-down end of the tube, pushing the tube and the mandrel through a die, and thereafter pulling the removable plug and the tube from the mandrel while causing the outer periphery of the tube to pass through a die.
摘要翻译：一种用于生产可变壁厚管道的方法，特别是用于生产双对接管道的方法，其中管端部处的壁厚或量规大于管的中间部分中的壁厚或量规。这通过将管穿过心轴，通常在其一端具有可移除的塞子，直到塞子的一部分穿过管的颈缩端，将管和心轴推过模具，然后在使芯管的外周通过模具的同时从心轴拉动可移除的塞子和管子。

3. 发明授权

US06807837B1 Method and apparatus for producing variable wall thickness tubes and hollow shafts 有权
标题翻译：用于生产可变壁厚管和空心轴的方法和装置
公开(公告)号：US06807837B1
公开(公告)日：2004-10-26
申请号：US10397983
申请日：2003-03-26
申请人： Randall L. Alexoff
发明人： Randall L. Alexoff
IPC分类号： B21D122
CPC分类号： B21C1/00
摘要： A method and apparatus for draw forming, from a tubular workpiece, a tube or hollow shaft having a variable wall thickness, using a reducing die without an internal mandrel. A tension force is applied to the workpiece at one axial side of the die and a compression force is applied at the opposite axial side of the die. Changing the relative magnitudes of the tensile and compressive forces produces corresponding changes in the wall thickness as the workpiece passes through the die.
摘要翻译：一种用于使用没有内部心轴的还原模具从管状工件，具有可变壁厚的管或中空轴拉伸成形的方法和装置。在模具的一个轴向侧向工件施加张力，并且在模具的相对的轴向侧施加压缩力。当工件通过模头时，改变拉伸和压缩力的相对大小产生相应的壁厚变化。

4. 发明授权

US4799412A Method for severing the ends of tubing 失效
标题翻译：切断管端的方法
公开(公告)号：US4799412A
公开(公告)日：1989-01-24
申请号：US918143
申请日：1986-10-14
申请人： Randall L. Alexoff
发明人： Randall L. Alexoff
IPC分类号： B23D21/14
CPC分类号： B23D21/14 , Y10T82/16016 , Y10T82/16639 , Y10T83/0596 , Y10T83/386 , Y10T83/387 , Y10T83/392 , Y10T83/397 , Y10T83/398
摘要： Method for severing the ends of tubing by feeding the end of a tube through a die such that its end to be sheared extends beyond the die while presenting a shear blade with a pointed end in the interior of the tube end. After the shear blade is inserted into the tube, relative vertical movement between the shear blade and the tube is effected to cause the pointed end to initially puncture the tube wall adjacent the die. The shearing blade is thereafter shifted laterally and vertically to shear remaining portions of the tube wall.
摘要翻译：通过将管的端部通过模头进行切断以使其待剪切的端部延伸超过模头而呈现具有尖端的剪切刀片在管端内部的方法。在将剪切刀片插入管中之后，剪切刀片和管子之间的相对垂直运动被实现，使得尖端最初刺穿邻近管芯的管壁。此后，剪切刀片横向和垂直地移动以剪切管壁的剩余部分。

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