| 摘要 |
The invention relates to a method and a device for producing annular, rotationally symmetrical workpieces, such as rings or cores for matrices, made of metal and/or ceramic powder, particularly for dies for pressing powder or massive forming of workpieces or components made of metal. Starting from the disadvantages of the known state of the art, a method is proposed allowing conversion to different qualities at short notice, and characterized by low process engineering effort. The invention proposes that a beam core 3 or a shaft-shaped element having at least one beam core is clamped into a rotatable clamping device 2, and is caused to rotate. The beam core is made of highly temperature-resistant material and has at least one segment 4, the outer diameter thereof corresponding to or being smaller than the inner diameter of the workpieces to be produced. Metal and/or ceramic powder is fused onto the jacket surface of the beam core 3 at a defined distance from the clamping fixture 2 by means of a laser head 1, and is applied in layers until the final wall thickness of the workpiece blank has been formed. After cooling, the beam core 3 is partially or completely removed from the workpiece blank 5, and the blank is machined on the inner and/or outer sides thereof to achieve the final dimension. The proposed method allows very economical production of rotationally symmetrical workpieces in short-run production. |
