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2. 发明授权

US3888146A Contour machining 失效
标题翻译：轮廓加工
公开(公告)号：US3888146A
公开(公告)日：1975-06-10
申请号：US46737474
申请日：1974-05-06
申请人： BULLARD CO
发明人： TOMENCEAK ARTHUR A
IPC分类号： B23Q35/10 , B24B19/09 , B23B3/00 , B23B27/10
CPC分类号： B24B19/09 , B23Q35/103 , Y10T82/10 , Y10T82/122 , Y10T82/125 , Y10T408/455
摘要： The disclosure relates to techniques in equipment for the machining with single point tooling of non-ciruclar shapes and contours. The procedure according to the invention involves the use of a rotary cutting head, carrying one or more cutting tools, arranged to be advanced axially to accomplish internal boring or external turning of non-circular shapes. The cutting head, which may be considered either a boring head or a turning head, depending on whether the cut is taken internally or externally, is mounted for controlled advancing and retracting movements along its rotational axis. The curring tools themselves, which are carried by the cutting head, are mounted for controlled radial extending and retracting movements as a function of the rotational position of the spindle. The extending and retracting movements of the cutting tool or tools is controlled by means of a pre-shaped contour cam mounted in fixed relation to the workpiece. During each rotation of the spindle, the cutting tools are extended and retracted according to the pattern of the contour cam, resulting in a contoured, non-circular, cutting or boring of the workpiece. Because the tool-carrying spindle rotates, while the work remains stationary, the centrifugal force created by the spindle rotation is used to great advantage to assist in controlling movement of the tool slide in accordance with the path determined by the contour cam. The process and apparatus of the invention can be utilized to outstanding advantage in connection with the machining of epitrochoidal chambers for rotary combustion (e.g., Wankel) engines. Significant process aspects of the invention are directed to that end. In this connection, the invention involves the two-stage machining of an epitrochoidal chamber, with the spindle axis of the machine offset a predetermined distance from the plane dividing the two principal lobes of the chamber. In accordance with an important aspect of the invention, by offsetting the spindle axis along the major axis of the chamber, to be located a short, predetermined distance from the transverse dividing plane, an entire half of the epitrochoidal chamber may be machined in one pass of the spindle, using single point cutting tools. The spindle axis is then symmetrically repositioned in offset relation on the opposite side of the dividing plane, to effect machining in a single pass of the other half of the chamber. This extraordinary technique permits exceptional time economies to be realized in the machining of the combustion chamber while at the same time achieving much greater levels of accuracy than has been obtainable with conventional machining processes.
摘要翻译：本公开涉及用于用非点击式形状和轮廓的单点加工进行加工的设备中的技术。根据本发明的方法涉及使用旋转切割头，其携带一个或多个切割工具，其被布置成轴向前进，以实现非圆形的内部镗孔或外部转动。根据切割是在内部还是外部进行切割，切割头可以被认为是钻头或转头，用于沿其旋转轴线进行控制的前进和后退运动。由切割头携带的卷曲工具本身被安装成作为主轴的旋转位置的函数的受控的径向延伸和缩回运动。刀具或刀具的伸缩运动通过预先形状的轮廓凸轮进行控制，该轮廓凸轮与工件固定。在主轴的每次旋转期间，根据轮廓凸轮的图案，切割工具被延伸和缩回，导致工件的轮廓，非圆形，切割或钻孔。由于工具主轴旋转，工作保持静止时，由主轴旋转产生的离心力可大大有利于根据由轮廓凸轮确定的路径来帮助控制工具滑块的移动。

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