Apparatus for broaching cylindrical surfaces of a workpiece, in
particular of a crankshaft
    45.
    发明授权
    Apparatus for broaching cylindrical surfaces of a workpiece, in particular of a crankshaft 失效
    用于拉削工件,特别是曲轴的圆柱形表面的装置

    公开(公告)号:US4768904A

    公开(公告)日:1988-09-06

    申请号:US906821

    申请日:1986-09-12

    申请人: Karl-Heinz Schmid

    发明人: Karl-Heinz Schmid

    IPC分类号: B23D37/00 B23D37/14

    摘要: Apparatus for broaching a cylindrical surface of a workpiece, in which at ast one broaching tool is mounted on a tool carrier rotatable about its axis and about the axis of the cylindrical surface of the workpiece clamped in a stationary position. The broaching tool is independently rotatable about its own axis, and the rotary motion of the tool is superimposed on the rotation of the carrier and consequently the revolving motion of the broaching tool. Since the workpiece is stationary during broaching, very high cutting speeds can be achieved. The broaching tool can be of small and lightweight construction so that it is especially suitable for an automatic tool change. In a preferred form, a plurality of broaching tools are utilized, the axes of which are spaced outwardly from and circumferentially about the axis of the workpiece.

    摘要翻译: 用于拉削工件的圆柱形表面的装置,其中至少一个拉削工具安装在可围绕其轴线旋转的工具架上并且围绕被夹紧在静止位置的工件的圆柱形表面的轴线。 拉削工具可以围绕其自身的轴线独立地旋转,并且工具的旋转运动叠加在载体的旋转上,并因此与拉削工具的旋转运动重叠。 由于工件在拉削期间是静止的,所以可以实现非常高的切割速度。 拉削工具可以是小而轻的结构,使其特别适用于自动换刀。 在优选形式中,使用多个拉削工具,其轴线相对于工件的轴线向外周向地周向隔开。

    Alkylene oxide block polymers usable as defoamers
    46.
    发明授权
    Alkylene oxide block polymers usable as defoamers 失效
    可用作消泡剂的环氧烷嵌段聚合物

    公开(公告)号:US4745231A

    公开(公告)日:1988-05-17

    申请号:US893756

    申请日:1986-08-06

    摘要: Block polymers usable as defoamers have the following formula ##STR1## in which R represents a glycerol or polyglycerol function having a degree of polymerization x of from 1 to 6 and the indices y is equal to (x-z+2), z is equal to (x-y+2), a is equal to 1 to 15, b is equal to 50 to 200 c is equal to 1 to 15, d is equal to 20 to 150 and e is equal to 1 to 15, with the proviso that the sums (a+c+e) is equal to 2 to 20, (b+d) is equal to 50 to 250 and (c+e) is equal to 1 to 15, and y has a value of at least 1.The block polymers are prepared by reaction of glycerol or polyglycerol having a degree of polymerization x with ethylene oxide, then with propylene oxide and, finally, again with ethylene oxide, preferably in the presence of alkaline etherification catalysts.

    摘要翻译: 可用作消泡剂的嵌段聚合物具有下式(IMAGE),其中R表示聚合度x为1至6且指数y等于(x-z + 2)的甘油或聚甘油官能团,z等于 至(x-y + 2),a等于1至15,b等于50至200c等于1至15,d等于20至150,e等于1至15,其中 条件是(a + c + e)之和等于2至20,(b + d)等于50至250,(c + e)等于1至15,y至少为 嵌段聚合物通过具有聚合度x与环氧乙烷然后与环氧丙烷的甘油或聚甘油反应制备,最后再次与环氧乙烷反应,优选在碱性醚化催化剂的存在下进行。