US 12,479,046 B2
Devices for producing roughened surfaces
Gerhard Flores, Ostfildern (DE); Martin Freitag, Nürtingen (DE); and Oliver Bey, Ostfildern (DE)
Assigned to GEHRING TECHNOLOGIES GMBH + CO. KG, Ostfildern (DE)
Appl. No. 17/435,282
Filed by GEHRING TECHNOLOGIES GMBH + CO. KG, Ostfildern (DE)
PCT Filed Feb. 28, 2020, PCT No. PCT/EP2020/055326
§ 371(c)(1), (2) Date Aug. 31, 2021,
PCT Pub. No. WO2020/178189, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10 2019 105 295.5 (DE), filed on Mar. 1, 2019.
Prior Publication US 2022/0152734 A1, May 19, 2022
Int. Cl. B23K 26/10 (2006.01); B23K 26/03 (2006.01); B23K 26/14 (2014.01); B23K 26/352 (2014.01); B23K 37/02 (2006.01)
CPC B23K 26/106 (2013.01) [B23K 26/032 (2013.01); B23K 26/14 (2013.01); B23K 26/3584 (2018.08); B23K 37/0276 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An apparatus for laser treatment, the laser treatment being directed to surfaces of a plurality of workpiece openings that are spaced at a distance from one another, the workpiece openings being one of surfaces of cylinder bores or of a single cylinder bore, the apparatus comprising:
a. at least a work station, wherein the work station comprises at least one laser treatment module having a module axis, and a positioning device via which a relative movement between a workpiece arranged in the work station for treatment and the laser treatment module can be effected,
b. wherein the laser treatment module comprises beam guiding optics which are designed to guide a laser beam for the treatment of the surface in a discharge direction that is inclined relative to the module axis and a plane which is orthogonal to the module axis onto the surface to be treated, and
c. wherein the laser treatment module is designed and arranged in order to rotate the laser beam about the module axis, the laser treatment module comprising a rotation device having a direct drive being designed as a hollow shaft drive and a rotor of the hollow shaft drive rotatable about an axis of rotation which corresponds to the module axis,
d. wherein, the beam guiding optics comprises a collimator unit for collimation of the laser beam coming from a radiation source and a focusing unit for focusing the collimated laser beam, which is held via a sleeve-like element which extends into the rotor and is connected to the housing, and a discharge direction-defining beam deflecting device which deflects the laser beam for the treatment of the surface from a main optical direction extending along the module axis in the discharge direction, the rotation device adapted to rotate the discharge direction-defining beam deflecting device relative to the collimator unit or relative to the collimator unit and the focusing unit about the module axis in order to effect the rotation of the exiting laser beam about the module axis,
e. wherein, the laser treatment module comprises a first further beam deflecting device in the optical path upstream of the discharge direction-defining beam deflecting device, and upstream of the focusing unit, which beam deflecting device deflects the laser beam in the main optical direction, and
f. wherein the laser treatment module comprises a process gas flow path comprising an outlet opening and a portion extending along the main optical direction, the portion being arranged between the first further beam deflecting device and the discharge direction-defining beam deflecting device, and the process gas exiting at the outlet opening, wherein the process gas flow path is designed such that the process gas flows along the outside of the sleeve-like element, which is used to hold the focusing unit.