Because the lead screw is a single piece production, the requirements are higher, so the processing process is strictly in accordance with the principle of process division stage, the whole process is divided into five stages: preparation and pre heat treatment stage, rough processing stage, semi finishing stage, finishing stage, final processing stage.

为了xiao除残余应力，整个工艺过程安排了残余应力的热处理，并严格规定机械加工和热处理后不准冷校直，以防止产生残余应力。为了xiao除加工过程中的变形，每次加工后工件应垂直吊放，并采用留加工余量分层加工的方法，经过多道工序逐步加工过程中引起的变形

In order to eliminate the residual stress, the heat treatment for eliminating the residual stress is arranged in the whole process, and it is strictly stipulated that cold straightening is not allowed after machining and heat treatment, so as to prevent the generation of residual stress. In order to eliminate the deformation in the process of machining, the workpiece should be hoisted vertically after each machining, and the method of layered machining with machining allowance should be adopted to gradually eliminate the deformation in the process of machining through multiple processes

1、传统的内螺纹检测都是用螺纹塞规、螺纹校对量规对中径进行综合测量。也就是按照螺纹检测的泰勒原则要求，用通规和止规分别控制螺纹的作用中径和单一中径不超过大、小实际边界。但这种方法只能判断螺纹是否合格，而给不出被测单一中径和作用中径的实际值，因此在内螺纹的加工制造过程中，不易掌握具体尺寸导向，容易产生废品。

1. The traditional internal thread inspection is to measure the pitch diameter with thread plug gauge and thread check gauge. In other words, according to the Taylor principle of thread detection, the through gauge and stop gauge are used to control the effective pitch diameter and single pitch diameter of the thread respectively, which do not exceed the actual boundaries of large and small. However, this method can only judge whether the thread is qualified or not, and can not give the actual value of single pitch diameter and action pitch diameter. Therefore, it is not easy to grasp the specific size guidance in the process of internal thread manufacturing, and it is easy to produce waste products.

2、为了保证螺纹工作环规的可靠性，生产中要配备好几种校对量规对其校对。这对于生产批量不是很大，而品种规格多的螺纹件的生产，是很不经济的。在这种情况下，用中径量化法检测，取代螺纹校对规无疑是种好方法。特别是对于大尺寸的螺纹，更可以节省较贵的校对量规，也更为有利。

2. In order to ensure the reliability of the screw working ring gauge, several kinds of checking gauges should be equipped in production to check it. This is very uneconomic for the production of threaded parts with small batch size and many varieties and specifications. In this case, it is a good method to replace thread checking gauge with pitch diameter quantitative method. Especially for the large size thread, it can save more expensive proofing gauge and is more advantageous.

3、用量化法检测可以把螺纹测量的量值统一起来，使螺纹检测更加严格、规范。

3. The quantitative method can unify the measurement value of thread and make the thread detection more strict and standard.

4、对于某些军工产品，其标准要求仅用螺纹量规检测还不够，必须用量化检测方法对个参数进行单项检测。

4. For some military products, it is not enough to only use thread gauge to test according to the standard requirements, and it is necessary to use quantitative testing method to test each parameter individually.