| 摘要 |
<p>The invention relates to a boring machine attachable to a workpiece to be bored and suitable for internal or external build-up welding precisely on the boring point, the machine performing automatically or semi-automatically all said operations, and comprising: a cylinder (1) inside which there may be inserted a rod guided by a driving bushing which allows the rotation and longitudinal movement of the tool-holder rod (3); a handle for the transport; three motoreducers (14, 16 and 21) supplied with direct current and placed inside the housing; three motors for the tool-holder rod rotation, for the forward and the backward advance of the rod in the boring stage and for the build-up welding of some parts which may possibly need to be re-machined allowing the rotation of the torch (5) together with the welding electrode, at very small rotations which may be ellectronically varied; a screw (67) placed on the tool-holder head for the manual advance of the tool; a rotatable device for connecting the torch.</p> |
