摘要:
A METHOD AND APPARATUS FOR PRODUCING METAL OBJECTS HAVING A ROTATIONAL SURFACE OF A SPECIFIC CONFIGURATION BY MEANS OF EXERTING PRESSURE ON THE OBJECT IN AT LEAST TWO RADIAL DIRECTIONS BY TOOLS HAVING SHAPING SURFACES WHICH ARE ROLLED IN THE CIRCUMFERENTIAL DIRECTION ALONG THE OBJECT TO BE TREATED. THE OBJECTS ARE PLASTICALLY SHAPED IN A CYCLICAL MANNER WITH A PLURALITY OF SUCCESSIVELY REPEATED CYCLES TO PRODUCE THE INDIVDUAL SEGMENT OF ROTARY SURFACE OR SEGMENT OF INNER TOOTHING WHOSE THEORETICAL ROLLING SURFACE, TOGETHER WITH ITS PROLONGATION BEYOND THE TOOL, FORMS A CYLINDRICAL SURFACE WHICH IS INTERNALLY TANGENTIAL TO THE CYLINDRICAL ROLLING SURFACE OF THE TOOTH BEING WORKED. FOR EACH SUCCESSIVE PHASE OF EACH CYCLE, THE OBJECT BEING WORKED IS AXIALLY SHIFTED BY A FEED QUANTITY WITHIN THE TIME WHEN THE OBJECT IS OUT OF CONTACT WITH THE TOOLS.
摘要:
At least one swaging unit is provided, which defines a feed path along which a rod-shaped workpiece is axially movable in said unit. Each of said units comprises a frame, a plurality of guides spaced around said path and extending substantially radially with respect to said path and rotatably mounted in said frame on axes which extend transversely to said path, a plurality of dies which consist of connecting rods and are slidably mounted in respective ones of said guides, a plurality of eccentric shafts mounted in said frame and extending parallel to said path and operatively connected to respective ones of said dies to reciprocate the same in said guides, and oscillating means for imparting to each of said dies an oscillating pivotal movement about the axis of rotation of the respective guide.