| 摘要 |
The present specification discloses a tool head for use in machining timber trunks into beams and/or planks. The tool head is in the form of a truncated cone, hacking blades being attached to its periphery and extending over a generating line of the cone. Finishing blades which are provided on and project from the smaller area end of the conical head, are arranged in groups, the cutting edges of the finishing blades in a group being aligned substantially parallel to each other and a group of finishing blades being located between each two hacking blades. The tool head can be rotatably driven about its longitudinal axis, the finishing blades in each group being graduated along the axis of the tool head in such a way that each successive finishing blade when used on a timber trunk, is closer to the timber trunk than the preceding finishing blade taken in the direction of rotation of the tool head. The hacking blades process the side segments of a timber trunk as the trunk is passed over the smaller area end of the rotating tool head, in a direction perpendicular to the rotational axis of the tool head and the finishing blades smooth the even surface produced on the timber trunk. |
