3 results about "Recoating" patented technology

The present invention relates to a method for partial recoating of a ceramic layer system (1), wherein a recess (16) is first created in the ceramic layer system (1) by means of a coating removal method, wherein the ceramic coating is partially and completely removed and the metal coating is partially and at least partially removed, wherein a metal adsorbent layer (7) is then applied, wherein a protective portion (19) is preferably used around the recess (16), and after the metal adsorbent layer (7') is fully applied or repaired, material is removed obliquely in the edge region within the recess (16) in such a way as to remove the material of the ceramic layer (10) in a stepped manner around the recess (16), and then, in a final step, new ceramic material (31) is applied to the repaired recess (16').

The invention belongs to the technical field of micro-drill de-coating, and discloses a micro-drill de-coating method and a micro-drill de-coating device. The micro drill coating removing method is used for removing a coating on a coating surface of a micro drill and comprises the following steps: determining the thickness of the coating; judging whether the thickness of the coating is less than or equal to 1 [mu] m or not, if so, executing the step of scanning the coating layer by layer by using ultrafast laser generated by an ultrafast laser generator until the coating is completely removed, and if not, scanning the coating layer by layer by using nanosecond laser generated by a nanosecond laser generator until the thickness of the coating is 0.08-0.12 [mu] m, and then scanning the coating layer by layer by using nanosecond laser generated by a nanosecond laser generator until the thickness of the coating is 0.08-0.12 [mu] m; and then ultrafast laser generated by an ultrafast laser generator is adopted to scan the coating layer by layer until the coating is completely removed. The micro-drill de-coating device comprises a fixing device, a nanosecond laser generator and an ultrafast laser generator. The micro-drill de-coating method and the micro-drill de-coating device provided by the invention have better de-coating effect and higher de-coating efficiency.

An additive manufacturing apparatus with multiple powder feeding and recoating units, and an additive manufacturing method. The apparatus comprises a scanning device, a control device, a substrate and a plurality of powder feeding and recoating units. The scanning device is used for performing scan melting on a powder material according to a preset path and process parameters. The substrate is used for bearing the powder material and a workpiece formed by the melting, the whole working area of the upper surface of the substrate that is used for the powder recoating and the scan melting being divided into a plurality of sub-working areas. The control device is used for controlling the scanning device to perform scan melting on some sub-working areas among all the sub-working areas, and simultaneously controlling the powder feeding and recoating units to recoat other sub-working areas with a powder. The present application allows powder recoating and scanning to be simultaneously and independently carried out, that is, powder recoating does not occupy the scanning time of the apparatus, thereby improving the printing efficiency of the apparatus to the maximum extent.