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    Method and apparatus for precisely contouring a workpiece imprecisely positioned on a supporting fixture
    2.
    发明授权
    Method and apparatus for precisely contouring a workpiece imprecisely positioned on a supporting fixture 失效
    用于精确构造在支撑位置上明确定位的工件的方法和装置

    公开(公告)号：US3633011A

    公开(公告)日：1972-01-04

    申请号：US3633011D

    申请日：1968-08-29

    Applicant: IBM

    Inventor： BEDERMAN SEYMOUR ,  LANKFORD LARRY G

    IPC: B23Q15/22 ,  G05B19/18 ,  G05B19/408 ,  G05D5/00 ,  B23Q5/22 ,  G06F15/18

    CPC classification number: G05B19/4083 ,  G05B19/408 ,  G05B2219/36503 ,  G05B2219/37193 ,  G05B2219/37196

    Abstract: Method and apparatus for manufacturing precisely dimensioned metal parts on a program-controlled machine tool having a workpiece-supporting fixture, without the necessity of precisely locating the workpiece on the fixture. The workpiece is first placed on the fixture in an approximate position within predetermined limits of a standard position. The actual position (i.e., location and orientation) of the workpiece on the fixture is then measured by means of a programmed measuring apparatus while the fixture is accurately located with respect to that apparatus. The machine tool is controlled by a standard program, based on a standard position of the workpiece on its fixture and an accurate location of the fixture on the machine tool. The data defining the actual position of the workpiece on the fixture are utilized to modify the program of the machine tool, so as to compensate for the difference between the standard position of the workpiece and its actual position. The measurement of the workpiece position is performed at a measuring station, and the fixture with the workpiece mounted thereon is then conveyed to a fabrication station, which is shown as including a numerically controlled five-axis machine tool. The position-defining data determined at the measuring station is associated with identifying data of the particular fixture and is stored in a memory. When that fixture arrives at the fabrication station, it is accurately located with respect to the machine tool, and is identified. The identifying data is used to retrieve from the memory the proper set of position-defining data, which is used to modify the machine tool program to produce the desired precisely dimensioned product.

    Abstract translation: 在具有工件支撑夹具的程序控制的机床上制造精确尺寸的金属部件的方法和装置，而不需要将工件精确地定位在固定装置上。

    Pattern and cavity electroerosion by repeated raster scanning
    3.
    发明授权
    Pattern and cavity electroerosion by repeated raster scanning 失效
    通过重复扫描扫描的图案和空穴电离

    公开(公告)号：US3591761A

    公开(公告)日：1971-07-06

    申请号：US3591761D

    申请日：1968-07-05

    Applicant: IBM

    Inventor： BEDERMAN SEYMOUR ,  LANKFORD LARRY G

    IPC: B23H7/26 ,  B23H7/20 ,  G05B19/18 ,  G05B19/27 ,  G05B19/4093 ,  B23P1/12 ,  B23P1/14

    CPC classification number: B23H7/20 ,  G05B19/188 ,  G05B19/27 ,  G05B2219/37405 ,  G05B2219/45221

    Abstract: A multiple axis machine tool control system is provided for removing layers of material from a workpiece. The system position controller repetitively moves the work element, in rectilinear parallel paths, in a scanning manner, back and forth across the workpiece between stored X- and Y-coordinate limits to remove incremental layers of material. Control of material removal in the Z-direction is dependent upon a current sensing arrangement whereby the magnitude of the current flow between the EDM work element and the workpiece is sensed and used to control the Zdirection position of the work element. The sensed current also acts to control the frequency of automatic calibration of the work element. With the EDM wire electrode stored on a reel a new section of electrode is automatically allowed to advance, during each calibration cycle, in dependence upon the amount of electrode wear.

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