Technological method for fixing tungsten-copper rolled needle

The invention discloses a technological method for fixing a tungsten-copper rolled needle. Based on a principle of heat expansion and cold contraction, a fixing part is heated to a high temperature firstly; the width of a pre-fabricated strip-shaped groove is increased; then the rolled needle is inserted rapidly; next, the temperature is reduced; and the strip-shaped groove is contracted to clamp the tungsten-copper rolled needle. By virtue of the technological method, the advantages of simple steps, convenient production, high product quality, long service life and easy popularization and application, and the like are achieved. 本发明公开了种用于钨钢卷针固定的工艺方法，利用热胀冷缩的原理，先将固定件加热至高温，预先制作的条形凹槽宽度增大，然后将卷针迅速插入，随后温度降低，条形凹槽收缩，将钨钢卷针夹住。本发明具有步骤简单、生产方便、产品质量高、使用寿命长和易于推广使用等优点。