| 摘要 |
<p>The method comprises passing a transmissive test medium through an opening of a work piece, directing a beam from an electromagnetic radiation source (31) to an ridge of the work piece, rounding the ridge with the beam and measuring a flow rate of the test medium through the opening, and switching off the beam when predetermined flow rate of the test medium is achieved through the opening. The beam has a power density that is larger than a partial rounding of a burr of the work piece. The electromagnetic radiation source includes a pulsed laser. The method comprises passing a transmissive test medium through an opening of a work piece, directing a beam from an electromagnetic radiation source (31) to a ridge of the work piece, rounding the ridge with the beam and measuring a flow rate of the test medium through the opening, and switching off the beam when predetermined flow rate of the test medium is achieved through the opening. The beam has a power density that is larger than a partial rounding of a burr of the work piece. The electromagnetic radiation source includes a pulsed laser or a label laser having a controllable beam deflection unit. The beam is directed to the ridge of the work piece for heating, melting or evaporating a partially rounded surface of the ridge. The method further comprises processing the work piece, performing a constant angular shift of 180[deg] /n, where n is the number of processing steps. The beam at a location of the opening has a diameter that is larger than a smallest diameter of the opening. The power density of beam in the burr is larger to cause the rounding of the ridge. The test medium is passed at a predetermined pressure and a predetermined temperature. The test medium includes a liquid such as water, a non-flammable oil, or a gas including nitrogen or inert gas. An independent claim is included for a device for adjusting a flow through an opening of a work piece.</p> |
