公开(公告)号：US4329864A

公开(公告)日：1982-05-18

申请号：US176956

申请日：1980-08-11

Applicant: Harry C. Ledebur

Inventor： Harry C. Ledebur

IPC: B21B31/12

CPC classification number: B21B31/12

Abstract: Disclosed is a vertical stand of a sizing mill for rolling seamless tube in which each roll of the mill is contained in and supported by a yoke moveable both transversely of the product passline and axially of the roll axis, the latter adjustment being performed by an elevator arranged normally at the bottom of the mill for moving both yokes as a unit with their rolls, i.e. a yoke-roll set, through the top of the stand to a roll changing position where both yokes are transferred as a unit to one of two in-lined arranged side shifting carriages supported by the stand, the arrangement being such that when a used yoke-roll set is moved away from the stand at the top thereof by one of the carriages a replacement yoke-roll set is positioned above the stand of the other carriage in readiness to be received and lowered into the stand by the elevator.

Abstract translation: 公开了一种用于轧制无缝管的上浆机的立式机架，其中轧机的每一卷被容纳在横向于产品通行线和辊轴的轴向两者上运动的轭架中，后者的调整由电梯 通常布置在磨机的底部，用于将两个轭作为一个单元与它们的辊（即，轭辊组）一起通过支架的顶部移动到两个轭作为一个单元转移到两个 由支架支撑的线性排列侧移动支架，该布置使得当使用的轭架组在其顶部通过一个托架移动离开支架时，替换的轭 - 辊组位于 另一台车厢随时可以被电梯接收和下放到车站内。

公开(公告)号：US07225660B1

公开(公告)日：2007-06-05

申请号：US11127722

申请日：2005-05-13

Applicant: Harry C. Ledebur

Inventor： Harry C. Ledebur

IPC: B21D41/02 ,  B21D39/20 ,  B21D3/02

CPC classification number: B21D41/02 ,  B21D39/20

Abstract: A method of expanding a diameter of a tube includes the steps of positioning the tube with one end abutting a stop member, extending a mandrel through an interior passageway of the tube, and expanding a diameter of an expandable head connected to the mandrel as the mandrel is moved in a direction toward the stop member. The diameter of the tube expands in correspondence with the expansion of the diameter of the mandrel. A longitudinal axial force is applied to the tube in a direction toward the stop member as the expandable head expands the diameter of the tube.

Abstract translation: 一种扩大管直径的方法包括以下步骤：将管的一端邻接止挡件定位，将芯棒延伸穿过管的内部通道，并且将连接到心轴的可扩张头的直径扩大为心轴 沿朝向止挡构件的方向移动。 管的直径与心轴的直径的膨胀相对应地膨胀。 当可扩张头扩大管的直径时，纵向轴向力沿朝向止挡构件的方向施加到管。

公开(公告)号：US5315854A

公开(公告)日：1994-05-31

申请号：US897010

申请日：1992-06-11

Applicant: Harry C. Ledebur

Inventor： Harry C. Ledebur

IPC: B21C37/18 ,  B21D41/04 ,  B21J7/18 ,  B21D7/00 ,  B21D11/08 ,  B21D37/14

CPC classification number: B21D41/04 ,  B21C37/18 ,  B21J7/18

Abstract: An apparatus for tapering a tube having a frame, a tube receiving end connected to the frame, a variable-orifice die arranged so as to be movable relative to the frames, and an axial tension cylinder connected to the tube receiving end so as to apply tension forces to the tube. The variable-orifice die includes a stand having a housing and a plurality of die segments arranged within the housing. The die segments contain a circular groove of varying radius. The die segments define an orifice having an entry plane and an exit plane. The exit plane and the entry plane are offset from the plane of rotation of the die segments. The orifice is truly round in a plane parallel to and offset from the plane of rotation. A motion control processer is interactively connected with the die stand and with the axial tension cylinder for controlling a position of the axial tension cylinder relative to a rate of reduction of the diameter of the tube.

Abstract translation: 一种用于使具有框架的管锥形的装置，连接到框架的管接收端，被布置成可相对于框架移动的可变孔模，以及连接到管接收端的轴向张力筒，以便施加 对管的张力。 可变孔模具包括具有壳体和布置在壳体内的多个模具段的支架。 模具段包含具有不同半径的圆形凹槽。 模具段限定具有入口面和出口平面的孔口。 出口平面和进入平面偏离模具段的旋转平面。 孔口在与旋转平面平行并偏离的平面中是真正的圆形。 运动控制处理器与模座和用于控制轴向拉力缸相对于管直径减小速率的轴向张力缸交互地连接。

公开(公告)号：US3945547A

公开(公告)日：1976-03-23

申请号：US464542

申请日：1974-04-26

Applicant: Harry C. Ledebur

Inventor： Harry C. Ledebur

IPC: B21C1/30 ,  B65G37/00 ,  B65H17/24

CPC classification number: B65G37/005 ,  B21C1/30 ,  B65G2201/0217 ,  B65G2207/14

Abstract: Tractive apparatus for longitudinally moving elongated material providing opposed tractive assemblies for gripping material therebetween by opposed and balanced gripping forces. Each tractive assembly provides a plurality of tractive members in end-to-end relation confined to circulation in a closed path and the apparatus is characterized by the provision of means for holding the tractive members in abutting relationship at least during the time they grip the material.The apparatus is further characterized by the reduction of frictional forces on the tractive members by forcing the latter against the elongated material by sets of rolling bodies, each set of which circulates in a closed path within a respective tractive member path. Each tractive member has a material gripping face and each face is maintained in assembled relation with its tractive member by magnetic attraction to provide for ready removal and replacement of such faces.

Abstract translation: 用于纵向移动细长材料的牵引装置，提供相对的牵引组件，用于通过相对和平衡的夹紧力夹持材料。 每个牵引组件提供多个限制在封闭路径中循环的牵引构件，该装置的特征在于提供用于将牵引构件保持在邻接关系中的装置，至少在它们握住材料时 。