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    • 8. 发明公开
    • PEAK TORQUE LOWERING COMPOSITION, PART WITH SLIDING PART USING THE COMPOSITION, AND PRESS-FITTING METHOD USING THE COMPOSITION
    • ZUSAMMENSETZUNG ZUR SPITZENDREHMOMENTERNIEDRIGUNG,TEIL MIT GLEITTEIL AUS DIESER ZUSAMMENSETZUNG
    • EP1386982A1
    • 2004-02-04
    • EP02769213.6
    • 2002-05-08
    • Citizen Watch Co. Ltd.
    • AKAO, YujiKOIKE, Masayuki
    • C23C26/00G04B13/02F16D7/02
    • F16D7/021C10M141/10C10M2203/0206C10M2203/045C10M2203/065C10M2207/0406C10M2207/287C10M2207/289C10M2223/041C10M2223/049C10N2230/06C10N2240/06C10N2250/121C23C2/04C23C26/00C23F11/10F16D7/02G04B13/023
    • The peak-torque descending composition of the present invention contains a certain amount of an extreme pressure agent comprising at least neutral phosphate esters and/or neutral phosphite esters in a solvent comprising hydrocarbons and/or ethers. Further, a certain corrosion inhibitor may be contained. The part having a sliding portion of the present invention is surface-treated with the above composition. The process for producing a component or precision machine having a sliding portion comprises immersing a part having a sliding portion in the above composition to adhere or absorb the composition onto the surface of the part, then immediately, taking out the part from the composition, followed by drying, and subsequently assembling a component or precision machine using the part. The press fit method of the present invention comprises in pressing a metal shaft into a metal plate, preliminarily immersing the metal plate or the metal shaft in the peak-torque descending composition to adhere or absorb the composition onto an inner surface of a hole for press fit of the metal plate or the surface of the shaft, then immediately, taking out the metal plate or the shaft from the composition, and drying.
      According to the process for the production of a component or precision machine having a sliding portion of the present invention, the peak-torque descending composition of the invention is used as the surface treating agent, so that the gearwheel body having a slip mechanism which can be made from metallic materials with a simple structure wherein a large peak torque does not produce in an initial stage when slipped and wheel teeth of the gearwheel are not chipped even when the plastic gearwheel is used, can be efficiently produced. According to the present invention, there can be provided a press fit method wherein the occurrence of a burr phenomenon is prevented when the shaft is pressed into the metal plate.
    • 本发明的峰值扭矩下降组合物含有一定量的极压剂,其在包含烃和/或醚的溶剂中至少包含中性磷酸酯和/或中性亚磷酸酯。 此外,可以含有某种腐蚀抑制剂。 具有本发明滑动部分的部分用上述组成进行表面处理。 用于制造具有滑动部件的部件或精密机器的方法包括将具有滑动部分的部件浸入上述组合物中以将组合物粘附或吸收到部件的表面上,然后立即从组合物中取出部件,随后 通过干燥,然后组装使用该部件的部件或精密机器。 本发明的压入方法包括将金属轴压入金属板中,将金属板或金属轴预先浸入峰值扭矩下降组合物中以将组合物粘附或吸收到压制孔的内表面上 金属板或轴的表面,然后立即从组合物中取出金属板或轴,并干燥。 根据本发明的具有滑动部件的部件或精密机械的制造方法,使用本发明的峰值扭矩下降组合物作为表面处理剂,使得齿轮体具有 滑动机构可以由具有简单结构的金属材料制成,其中即使当使用塑料齿轮时,在滑动时初始阶段不产生大的峰值扭矩并且齿轮的轮齿也不会碎裂,可以有效地产生。 根据本发明,可以提供一种压配合方法,其中当轴被压入金属板时,防止产生毛刺现象。