Method for machining lip of hypersonic-speed low-noise wind tunnel nozzle

The invention discloses a method for machining a lip of a hypersonic-speed low-noise wind tunnel nozzle. The method includes the following steps that clamping is carried out, the thickness of the lipworkpiece is measured and the length L of the lip is determined, steps of the length L of the lip are roughly turned for the first time, the steps of the length L of the lip are roughly turned for thesecond time, the steps are removed after third-time rough turning, and fine turning is carried out. According to the method for machining the lip of the hypersonic-speed low-noise wind tunnel nozzle,the rigidity of the lip workpiece is improved through a step turning process, the problem that the lip workpiece easily deforms in the machining process is avoided, meanwhile, the machining efficiency is improved in the manner of increasing the bite, and the comprehensive machining efficiency is improved by 50%. 本发明公开了高超声速低噪声风洞喷管唇口加工方法。该方法包括以下步骤：装夹，测量唇口工件的厚度并确定唇口长度L，第一次粗车唇口长度L的阶梯台阶，第二次粗车唇口长度L的阶梯台阶，第三次粗车去掉台阶，精车。本发明的高超声速低噪声风