How to Process Cone on Ordinary Horizontal Lathe

  • Taper parts are widely used in machine tools, tools, and pipe threads. Examples can be seen everywhere. The main reasons for the wide application of taper fit are as follows:
    1. When the taper is small, it has a self-locking function and can transmit a lot of torque;
    2. The conical surface is easy to assemble and disassemble, and has high concentricity.
    3. Conical pipe thread also has a self-sealing function.

    In addition to the dimensional accuracy, form and position accuracy and surface roughness, the machining of the conical workpiece should also pay attention to the accuracy requirements of angle tolerance and taper. Now there are several ways to process cone on an ordinary lathe

    Wide blade CNC turning method. This method uses a relatively large forming tool, a method of direct processing. This method is simple and convenient to operate, but it is only suitable for a small number of workpieces with no accuracy requirements.

    The angle machining method of rotating small carriage. This machining method is easy to operate and has a wide range of adjusting angles, which is suitable for turning short workpieces. This method is slow to find the taper at the beginning, fast to process after alignment, and can ensure a certain accuracy. In addition, the accuracy of the small carriage itself and the height of the tool clamping also have a great impact on the final product.

    Tailstock offset method. One way to use the lathe tailstock lateral fine-tuning function is to hold the workpiece at both ends with the center, and the large carriage automatically feeds the tool, so that the surface roughness of the workpiece can be ensured, and the long workpiece can be processed. But it also has a big disadvantage, that is, because the two centers are not at the same center point, the center and the center hole are very worn, which is only suitable for one-time processing of the workpiece. In addition, this method is affected by the offset of the tailstock, so it can't process the workpiece with a large angle, and it can't process the inner cone hole.

    Mold profiling method. In short, it is a method of processing by using the existing taper template. Because I have never seen it, let alone done it, I can't say why.

    Bed head offset method. It is estimated that this method is not liked by mainstream engineers. Up to now, I have not seen any record of this method, but this method was very popular here a few years ago. That is to say, relative to the centerline of the bed surface, offset the head of the bed by an angle, so that no operation mode is changed, and the processed workpiece is a cone. When processing products in large quantities, this is a very effective method. For example, the conical pipe thread fittings mentioned above are processed on such a lathe, and the benefit is very considerable. But after the lathe head offset, in addition to readjust back, after basically can't process other products.