• 专利标题:   Manufacture of watch component, e.g. non-magnetic pivot axis, by producing blank of timepiece component comprising parts consisting of silicon carbide by machining raw part, and finishing by precision machining.
  • 专利号:   WO2022223477-A1
  • 发明人:   JACOT P, CALDERON I
  • 专利权人:   ACROTEC R D SA
  • 国际专利分类:   B23K026/0622, G04B001/14, G04B013/02, G04B015/14, G04B017/06, G04B031/08
  • 专利详细信息:   WO2022223477-A1 27 Oct 2022 G04B-017/06 202298 Pages: 28 French
  • 申请详细信息:   WO2022223477-A1 WOEP060144 14 Apr 2022
  • 优先权号:   EP169379

▎ 摘  要

NOVELTY - The method involves manufacturing a raw part of a timepiece component (1) comprising a part (2) consisting of silicon carbide. A blank of the component comprising the part is produced by machining the raw part. The part is finished by precision machining without force to obtain the finished part. A layer of graphene is formed on an outer surface of the portion consisting of the finished silicon-carbide. The machining is carried out by removal of material or by cutting. The graphene layer (4) is deposited by depositing the graphene layer, which has a thickness of 0.5-20 nm. USE - Timepiece component e.g. non-magnetic pivot axis and precision axis, for use in a timepiece movement i.e. mechanical watch movement. ADVANTAGE - The method allows extremely simple and economical production of the timepiece component. The use of graphene on the surface of the part makes it possible to greatly improve the properties of rigidity and the elastic limit of the component, compared with known timepiece components. In addition, the dynamic coefficient of friction of graphene is very low, and the part, and pivot can have a dynamic coefficient (≤ 0.2) without lubrication. The silicon carbide is non-magnetic and graphene has high corrosion resistance and all the performance of a current nonmagnetic pivot pin is improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a pivot of pivot axis. 1Timepiece component 2Part 4Graphene layer