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在天平修理中,更换精密天平的刀子,一般都是从横梁上卸下刀盒,然后用酒精灯烧烤刀盒或将刀盒浸泡在丙酮溶液中,待粘合剂软化后退出刀子。这样虽然达到目的,但对调修极为不便。我们通过实践,采用在刀槽与刀子结合部进行局部加温的方法,能快速更换天平刀子,其具体做法如下: 选好新刀待用;准备一把功率较小的(20w～40w)电烙铁;加工一根长约40mm,端面比刀子端面略小一点的硬质木棒和一块厚度约40mm,长、宽均为50mm的木块。在木块上垫放一层3～5mm的胶皮,胶皮和木块上加工一个比刀子稍大一点的三角或圆的穿孔。卸下横梁后倒置,用烙铁尖部烤烫刀盒两端刀子与刀槽结合处。待粘合剂熔化后,立即将横梁平放在胶皮上,使刀子对准孔洞中央,然后用木棒推出刀子(如果刀槽是压配合的应
In the balance repair, replace the precision balance knife, usually remove the knife box from the beam, and then use alcohol lamp grill knife box or the box soaked in acetone solution, until the binder softens and then exit the knife. Although this can achieve the goal, it is extremely inconvenient for the repair. We practice through the use of knives and knives in the Ministry of the Ministry of local heating method, the knife can quickly replace the balance, the specific practices are as follows: Select a new knife stand-by; prepare a smaller power (20w ~ 40w) electricity Iron; machining a length of about 40mm, the end surface of the knife slightly smaller than the end of the hard sticks and a piece of wood about 40mm in thickness, length, width 50mm. Put a layer of wood 3-5 ~ 5mm rubber, rubber and wood processing a slightly larger than the knife on the triangle or round perforation. After removing the beam upside down, with a hot iron tip scalpel knife at both ends of the knives combined with the knife groove. Immediately after the adhesive has melted, place the crossbar flat on the rubber and align the knife to the center of the hole, then push the knife with a stick (if the groove is press-fitted