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    • 3. 发明授权
    • Pipe-bending apparatus
    • 管弯装置
    • US4265106A
    • 1981-05-05
    • US41845
    • 1979-05-24
    • Tom McMasterThomas Reid
    • Tom McMasterThomas Reid
    • B21D7/06B21D7/03
    • B21D7/06
    • A pipe-bending apparatus comprises an elongate structure having a longitudinal work surface at, or adjacent to, opposite ends of which clamping means and a former are respectively mounted. The former is held fast on the work surface, and the clamping means is power-driven towards and away from it by a double-acting hydraulic ram. A series of formers are provided, each having, in plan, a semi-circular anvil mountable to face the clamping means. The anvils are each of concave vertical cross-section and of different radius from one another, with peripheral walls to locate a pipe in position in the anvil during a bending operation. The ram is supplied from a tank containing a hydraulic fluid tank which--together with the necessary hydraulic pump and electric motor--is mounted beneath the work surface.
    • 管弯曲装置包括细长结构,其具有位于其相对端或邻近其相对端的纵向工作表面,夹紧装置和前者分别安装在其上。 前者在工作表面上保持快速,并且夹紧装置通过双作用液压柱塞向着远离它的动力驱动。 提供了一系列成形器,每个成形器均具有可安装成面向夹紧装置的半圆形砧。 砧座各自具有凹入的垂直横截面并且彼此具有不同的半径,其中外围壁在弯曲操作期间将管定位在砧座中的适当位置。 压头由包含液压油箱的油箱提供,该液压油箱与必要的液压泵和电动马达一起安装在工作表面下方。
    • 4. 发明授权
    • Process and apparatus for bending two tubes with one extending through
the other
    • 用于弯曲两个管的方法和装置,一个延伸穿过另一个管
    • US4137743A
    • 1979-02-06
    • US823831
    • 1977-08-11
    • Rigobert Schwarze
    • Rigobert Schwarze
    • B21D7/024B21D3/16B21D7/025B21D7/03B21D9/00B21D9/07B21D9/05
    • B21D9/073Y10T29/49879
    • To fabricate a bent assembly of two metal tubes with one extending through and radially spaced within the other, the bending is done by inserting the smaller through the larger tube producing a tubular work assembly, clamping a leading work portion onto a bending forming die with the inner tube eccentric in the region to be bent against the die-adjacent inner wall portion of the outer tube, bending the region trailing the clamped portion by wrapping onto the bending die, while at (and immediately preceding) the point of feed onto the die the tubes are supported against collapse by a cylindrical mandrel in the smaller tube and a mandrel of crescent cross-section interposed between the large and small tube, in the plane of bending providing reaction support by a slideshoe bearing against the outer tube diametrically remote from the die; the mandrels being axially shiftably supported.
    • 为了制造两个金属管的弯曲组件,其中一个延伸穿过并在另一个中径向间隔开的金属管,弯曲通过将较小的管插入较大的管中来产生管状工作组件,将引导工作部分夹紧到弯曲成形模上, 所述区域内的内管偏心地抵靠外管的模具相邻的内壁部分,通过在进给到模具上的位置(并且紧接在之前)包裹到弯曲模具上来弯曲夹紧部分的区域 管被支撑在较小管中的圆柱形心轴和插入在大管和小管之间的新月形横截面的心轴,在弯曲平面中,通过滑动轴承抵靠外径远离 死; 心轴可轴向移动地支撑。