Exothermic welding apparatus and method
    1.
    发明授权
    Exothermic welding apparatus and method 失效
    放热焊接装置及方法

    公开(公告)号:US4889324A

    公开(公告)日:1989-12-26

    申请号:US128597

    申请日:1987-12-04

    IPC分类号: B23K23/00

    CPC分类号: B23K23/00

    摘要: An improved thermite reaction containment vessel and method of using the same includes a filter assembly which serves to filter the gases evolving from the thermite reaction and reduce the amount of smoke, fume and the like by-products emitted. In one preferred embodiment the filter assembly comprises a primary filter and a secondary filter. An air gap may be provided between the primary and secondary filter so as to provide additional cooling of the gases before they enter the secondary filter. The invention further provides a remote electrical ignition system which is capable of igniting thermite reaction materials without the use of a starting material. The ignition system may include an ignition fuse having an aluminum core and an outer coating comprising palladium and ruthenium or hot wire.

    摘要翻译: 改进的铝热反应容纳容器及其使用方法包括过滤器组件,其用于过滤从铝热反应产生的气体并减少烟雾,烟雾等副产物的排放量。 在一个优选实施例中,过滤器组件包括初级过滤器和次级过滤器。 可以在初级和次级过滤器之间提供气隙,以便在进入二次过滤器之前提供气体的附加冷却。 本发明还提供一种能够在不使用起始材料的情况下点燃铝热反应材料的远程电点火系统。 点火系统可以包括具有铝芯的点火保险丝和包含钯和钌或热丝的外部涂层。

    Exothermic welding apparatus including a baffle cover assembly
    2.
    发明授权
    Exothermic welding apparatus including a baffle cover assembly 失效
    放热焊接装置,包括挡板组件

    公开(公告)号:US4881677A

    公开(公告)日:1989-11-21

    申请号:US237080

    申请日:1988-08-29

    IPC分类号: B23K23/00

    CPC分类号: B23K23/00

    摘要: An improved thermite reaction containment vessel and method of using the same includes a crucible in which the exothermic material is contained and which is connected at its lower end via a tap hole to a weld chamber in which the parts to be welded are positioned. On top of the crucible is positioned a baffle assembly which includes a plurality of expansion chambers which allows the escaping gas to expand and be reduced in velocity. As the gases move from one expansion chamber to the next the gases change direction. The expansion, direction change and the large surface area of the baffle assembly allows the gases to slow and cool before being exhausted leaving behind molten metal spatter or flame and greatly reducing the amount of smoke exhausted since particulate matter is accumulated on the baffle interior surface. Several forms of baffle assembly are disclosed using inverted stacked metal cups. The baffle assembly may be used in conjucntion with a filter assembly and remote electrical ignition or without a filter assembly and conventional starting material, with such matrial being ignited through the top of the baffle assembly.

    摘要翻译: 改进的铝热反应容纳容器及其使用方法包括坩埚,其中容纳放热材料,并且其坩埚的下端通过分接孔连接到待焊接部件所在的焊接室。 在坩埚的顶部设置有挡板组件,该挡板组件包括多个膨胀室,其允许逸出的气体膨胀并且减小其速度。 当气体从一个膨胀室移动到下一个膨胀室时,气体改变方向。 挡板组件的膨胀,方向改变和大的表面积允许气体在排出之前减缓和冷却,留下熔融金属飞溅物或火焰,并且大大减少了由于颗粒物质积聚在挡板内表面上而排出的烟雾量。 使用倒置的堆叠金属杯公开了几种形式的挡板组件。 挡板组件可以与过滤器组件和远程电气点火结合使用,或者不使用过滤器组件和常规的起始材料,其中这种材料通过挡板组件的顶部点燃。

    Taper thread cutting machine and method
    3.
    发明授权
    Taper thread cutting machine and method 失效
    TAPER螺纹切割机及方法

    公开(公告)号:US5158404A

    公开(公告)日:1992-10-27

    申请号:US334333

    申请日:1989-04-07

    IPC分类号: B23G1/06 B23G5/10

    摘要: A machine for taper threading the end of a bar such as reinforcing bar used in concrete construction utilizes a power operated vice to clamp and feed the bar end axially into a rotary head which contains chaser tooling holders which open uniformly on the bar end as the head rotates. The rotary head is axially stationary but contains an axially movable key or linear cam which engages a readily removable transversely extending control rod assembly in turn moving the chaser holders. Axial movement of the power vice and thus the bar end at a controlled axial speed with respect to the rotary speed of the head moves the key to cause the movement of the chaser holders. The chaser holders in addition to supporting the thread cutting chasers also support ahead of the chaser an indexable triangular insert to pre-cone the bar end. To change the set-up of the machine for different bar sizes the control rod is removed and replaced, and a proper cutting speed for the bar is selected by adjusting the RPM of the head through a transmission. The extent of axial movement of the key may also be controlled to optimize the cycle time of the machine. In this manner all bar sizes may be threaded in a single pass and set-up from bar size to bar size is accomplished quite simply in a short period of time.

    Tapered thread cutting machine
    5.
    发明授权
    Tapered thread cutting machine 失效
    圆锥螺纹切割机

    公开(公告)号:US4526496A

    公开(公告)日:1985-07-02

    申请号:US391681

    申请日:1982-06-25

    IPC分类号: B23G5/10 B23G5/08

    摘要: A tapered thread cutting machine includes a multi-part rotary machining head, one part including a through-recess and another being a separable interior wear plate. Interacting chaser holders are mounted in the recess and include angled V-shaped slots in which block type chasers may be secured between clamps and locating pins enabling the chasers to be removed and replaced without removing the holders from the recess. The holders are driven by a linear cam for opening and closing movement through a thrust block mounted on a guide rod, such thrust block being fitted in a slot in one holder but otherwise not secured thereto so that binding in the opening and closing of tool holders is minimized.

    摘要翻译: 锥形螺纹切割机包括多部分旋转加工头,一部分包括通孔,另一部分为可分离的内部磨损板。 相互作用的追击器固定器安装在凹槽中,并且包括成角度的V形槽,其中块状刮板可以固定在夹具和定位销之间,使得可以移除和更换刮刀而不从凹槽移除夹持器。 保持器由用于通过安装在导杆上的推力块的开闭动作的线性凸轮驱动,该推力块装配在一个保持器中的狭槽中,但是不固定在其上,从而在刀架的打开和关闭中的装订 被最小化。