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在变压器制造中,要弯制各种不同截面的冷却水道铜管,其中最大矩形截面达15×66×2.5毫米,需弯成圆弧形线。以前我们采用在铜管内灌砂、铁丸、铅等多种方法,均未达到理想的效果,弯曲后凹凸不平达3～5毫米,严重影响产品的外观质量。为此,我们通过分析和探讨,改用在铜管内熔灌明矾的方法,然后用模具进行弯曲,取得了理想的效果,表面不平度在0.5毫米以下,并且没有皱折现象。一、明矾的性能明矾为无机化合物,是硫酸钾和硫酸铝的含水复
In the manufacture of transformers, a variety of copper pipe cooling water channels of different cross-sections are to be made, of which the largest rectangular cross-section is 15 × 66 × 2.5 mm and must be curved into a circular arc. In the past, we used a variety of methods such as filling sand, iron pellets and lead in copper pipes, which failed to achieve the desired results. The irregularities after the bending were 3 to 5 mm, seriously affecting the appearance quality of the product. To this end, we through the analysis and discussion, instead of melting the alum in the copper tube method, and then use the mold bending, and achieved the desired results, the surface roughness of 0.5 mm or less, and no wrinkles phenomenon. First, the performance of alum Alum is inorganic compounds, potassium sulfate and aluminum sulfate is an aqueous complex