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News Detail

机械手表机芯中的红宝石有什么作用?是越多越好吗?

119
Issuing time:2019-03-14 10:44

"为什么要在手表里镶红宝石?"




技术原因


机械腕表的重要组成部分,主要是那些运动机械,像齿轮传动链,摆轮和擒纵结构。早期,这些结构精巧的枢轴会直接钻出孔,并变成了被支柱分开的两片黄铜片。为了让装配和修理过程更简易,之后,上层黄铜片被别的元件所取代,此元件叫做"杆"(根据支架的数量,也可叫做"桥"或"棍")。


在枢轴另一末端的旋转点,下层黄铜片(叫做“底片”)被钻出了一些小孔。这些孔带有小油槽,从这里,油会流入孔中来润滑枢轴。然而,随着时间地推移,空气中的灰尘聚集到了油槽中。结果,这个油和灰尘的混合形成了具有磨蚀作用的物质,其作用就和砂纸一样。慢慢地,它会挫掉片上较软的黄铜,在某种程度上,甚至会挫掉较硬的钢制枢轴。伴随着手表的使用,油灰混合物的摩擦同枢轴的旋转的“合奏”,使得这些孔变成了椭圆形。之后,手表开始不能正常工作,直到停止。


通过这些观察,让表匠们意识到,需要找到一种比黄铜坚硬的材料,它可以经受住枢轴的磨损。这种材料就是红宝石,它是一种硬度仅次于钻石的材料。




许多朋友喜爱问手表有多少钻,由于他们觉得手表钻数越多,机芯就越好,这是一个过错的概念。手表的钻数,指的就是红宝石轴承,其实机芯上的红宝石大都情况下都是人工的,又名功用钻,实践的价值并不高。手表的钻数经常被标作XXJEWELS或许XXJ,刻于手表的机芯或许底盖上。


相对说来,宝石轴承越多代表机芯越杂乱。一般咱们把25钻之内的都成为功用钻,大都机芯除了这25钻外其他的都是没有实践功用的装修钻。比方下面这个机芯,它主动陀上标了100JEWELS,但从外观上来看,它明显不算是一个制造精巧的机芯。




宝石轴承其实是用宝石等硬质资料制成的滑动轴承。宝石具有冲突数小、硬度高、耐腐蚀、热膨胀系数小、抗压强度的优异功能。但天然红宝石产值较低且有杂质,所以绝大大都腕表都选用人工合成红宝石,基本成分三氧化二铝,参加氧化铬可让其出现天然红宝石的赤色。




在机芯运用红宝石之前,擒纵轮的旋轴、擒纵叉、摆轮轴杆以及行轮系的轮子都被旋入在黄铜夹板的孔洞中。长时刻磨擦既会带来磨损,所发生的金属屑又会影响润滑油的功能,成果滚动的旋轴压力和高速带来的冲突损害,令机芯难以承受。表匠发现硬度仅次于钻石的红宝石能够饱尝住纽带的磨损,确保手表正常作业。




红宝石轴承中有很多滚动的齿轮,它们耐磨抗压,由于有它们的存在,使得手表在运作中减少了许多冲突力。齿轮越轻松地工作,手表就能更长时刻地运作,贮存的动力也就相应越多。感谢观看!



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