公开(公告)号：US5666846A

公开(公告)日：1997-09-16

申请号：US679361

申请日：1996-07-09

申请人： Chin-Fu Chen ,  Wen-Hwa Lu ,  Shan-Chang Chueh

发明人： Chin-Fu Chen ,  Wen-Hwa Lu ,  Shan-Chang Chueh

IPC分类号： B21C23/08 ,  B21C26/00 ,  B21C23/00

CPC分类号： B21C26/00 ,  B21C23/085

摘要： An apparatus and method for manufacturing seamless tubes from hollow billets that will not contain metal oxide, which may be introduced into the extruded metal tube from an oxide layer formed on the inner surface of the hollow billets, so as to improve the quality of the extruded product and extend the service life of the extrusion piercer rod. A de-oxide latch, which has a substantially circular disk shape and is dimensioned such that it is slightly larger than the inner diameter of the hollow billet, is placed in front of the piercer rod so as to remove the metal oxide layer formed on the inner surface of the hollow billet through an upsetting shearing force ahead of the normal stress generated by the forward movement of the extrusion stem. The extrusion apparatus also utilizes a screw and pierce doughnut combination to securely affix the piercer rod to the stem and to effectuate the extrusion of the hollow billet through an extrusion die to form seamless tubes. This arrangement allows an easy interchange between a piercer rod, which is used for extruding hollow billets, and a ram, which is used for extruding a solid billet, so as to improve the versatility of the extrusion apparatus and reduce the manufacturing cost.

摘要翻译： 从不会含有金属氧化物的中空坯料制造无缝管的装置和方法，其可以从形成在中空坯料的内表面上的氧化物层引入到挤出的金属管中，以提高挤出的质量 产品延长了挤压穿孔棒的使用寿命。 具有大致圆盘形状并且尺寸使得其略大于中空坯料的内径的去氧化物闩锁被放置在穿孔棒的前面，以便去除形成在中空坯料上的金属氧化物层 通过挤压杆的向前运动产生的正常应力之前的镦锻剪切力，中空坯料的内表面。 挤压设备还采用螺钉和穿孔甜甜圈组合，以将穿孔杆牢固地固定到杆上，并且通过挤压模具实现中空坯料的挤出以形成无缝管。 这种布置允许用于挤出中空坯料的穿孔杆和用于挤出固体坯料的冲头之间的容易的交换，以便提高挤出设备的通用性并降低制造成本。

公开(公告)号：US5533375A

公开(公告)日：1996-07-09

申请号：US275175

申请日：1994-07-14

申请人： Chin-Fu Chen ,  Wen-Hwa Lu ,  Shan-Chang Chueh

发明人： Chin-Fu Chen ,  Wen-Hwa Lu ,  Shan-Chang Chueh

IPC分类号： B21C23/08 ,  B21C26/00 ,  B21C23/00

CPC分类号： B21C26/00 ,  B21C23/085

摘要： An apparatus and method for manufacturing seamless tubes from hollow billets that will not contain metal oxide, which may be introduced into the extruded metal tube from an oxide layer formed on the inner surface of the hollow billets, so as to improve the quality of the extruded product and extend the service life of the extrusion piercer rod. A de-oxide latch, which has a substantially circular disk shape and is dimensioned such that it is slightly larger than the inner diameter of the hollow billet, is placed in front of the piercer rod so as to remove the metal oxide layer formed on the inner surface of the hollow billet through an upsetting shearing force ahead of the normal stress generated by the forward movement of the extrusion stem. The extrusion apparatus also utilizes a screw and pierce doughnut combination to securely affix the piercer rod to the stem and to effectuate the extrusion of the hollow billet through an extrusion die to form seamless tubes. This arrangement allows an easy interchange between a piercer rod, which is used for extruding hollow billets, and a ram, which is used for extruding a solid billet, so as to improve the versatility of the extrusion apparatus and reduce the manufacturing cost.

摘要翻译： 从不会含有金属氧化物的中空坯料制造无缝管的装置和方法，其可以从形成在中空坯料的内表面上的氧化物层引入到挤出的金属管中，以提高挤出的质量 产品延长了挤压穿孔棒的使用寿命。 具有大致圆盘形状并且尺寸使得其略大于中空坯料的内径的去氧化物闩锁被放置在穿孔棒的前面，以便去除形成在中空坯料上的金属氧化物层 通过挤压杆的向前运动产生的正常应力之前的镦锻剪切力，中空坯料的内表面。 挤压设备还采用螺钉和穿孔甜甜圈组合，以将穿孔杆牢固地固定到杆上，并且通过挤压模具实现中空坯料的挤出以形成无缝管。 这种布置允许用于挤出中空坯料的穿孔杆和用于挤出固体坯料的冲头之间的容易的交换，以便提高挤出设备的通用性并降低制造成本。