我们在修理直角尺和百分表套筒松动的过程中,采用氧化铜和磷酸粘接的办法。经多次实验,证明效果很好,比用有机粘结剂粘接强度高、工艺简便、成本低,在常温下就可进行,不需加压等优点。具体方法是: 将直角尺长边的配合部位用锉刀锉,最好锉3-4道沟槽、光洁度一般应在▽_1～▽_3范围内,以增加粘接面积。粘接面的配合间隙(即粘层厚度)取0.1～0.2毫米为宜。若间隙过小,粘结剂难以进入配合表面,起不到粘接作用;若间隙过大,则因粘结剂较脆,势必导致粘接强度降低。 We used copper oxide and phosphoric acid bonding methods to repair the looseness of the square and dial indicator sleeves. After many experiments, it has proved that the effect is very good. Compared with organic binders, it has high bonding strength, simple process, low cost, and can be carried out at room temperature without the need of pressure. The specific method is: Use a trowel to knives the long edge of the square. The best 锉 3-4 grooves, finish is generally within the range of ▽ 1 ~ ▽ _ 3, in order to increase the bonding area. Adhesive surface fit clearance (ie, thickness of the adhesive layer) is preferably 0.1 to 0.2 mm. If the gap is too small, it is difficult for the adhesive to enter the mating surface and no adhesive effect is obtained. If the gap is too large, the adhesive is relatively brittle and the adhesive strength is bound to decrease.