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.

為了xiao除殘余應(yīng)力，整個工藝過程安排了殘余應(yīng)力的熱處理，并嚴(yán)格規(guī)定機械加工和熱處理后不準(zhǔn)冷校直，以防止產(chǎn)生殘余應(yīng)力。為了xiao除加工過程中的變形，每次加工后工件應(yīng)垂直吊放，并采用留加工余量分層加工的方法，經(jīng)過多道工序逐步加工過程中引起的變形

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、傳統(tǒng)的內(nèi)螺紋檢測都是用螺紋塞規(guī)、螺紋校對量規(guī)對中徑進行綜合測量。也就是按照螺紋檢測的泰勒原則要求，用通規(guī)和止規(guī)分別控制螺紋的作用中徑和單一中徑不超過大、小實際邊界。但這種方法只能判斷螺紋是否合格，而給不出被測單一中徑和作用中徑的實際值，因此在內(nèi)螺紋的加工制造過程中，不易掌握具體尺寸導(dǎo)向，容易產(chǎn)生廢品。

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、為了保證螺紋工作環(huán)規(guī)的可靠性，生產(chǎn)中要配備好幾種校對量規(guī)對其校對。這對于生產(chǎn)批量不是很大，而品種規(guī)格多的螺紋件的生產(chǎn)，是很不經(jīng)濟的。在這種情況下，用中徑量化法檢測，取代螺紋校對規(guī)無疑是種好方法。特別是對于大尺寸的螺紋，更可以節(jié)省較貴的校對量規(guī)，也更為有利。

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、用量化法檢測可以把螺紋測量的量值統(tǒng)一起來，使螺紋檢測更加嚴(yán)格、規(guī)范。

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

4、對于某些軍工產(chǎn)品，其標(biāo)準(zhǔn)要求僅用螺紋量規(guī)檢測還不夠，必須用量化檢測方法對個參數(shù)進行單項檢測。

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.