1. In order to ensure the precis秒短ion of precision machining. 購道A large number of workpieces 村姐are subjected to cutting force廠制, clamping force, and hea自學t generation, so rough m技內achining and finishing 但是should be carried out separat媽店ely. Due to rough machining. It is好鄉 easy to cause surface hardening, and t了舞here is a large internal對飛 stress inside the workpi姐子ece. If the finishing事吧 and roughing are continuous fi了時nishing, the precision of 光店the precision parts will be re著還distributed with the stress頻什 and will soon be lost長刀. For some parts with high ma要筆chining accuracy. Low temperature annea話資ling or aging treatment should be民數 carried out after rough mac玩影hining and before finish愛市ing to eliminate inter業水nal stress. Precision machini空說ng

     2. 工做The main process of roug火拍hing is to cut off most of the 要店machining allowance, a購村nd the roughing machine only needs h木知igh-power and low-prec金草ision processing. Finishing requires 在鐘more precise machine tools. Rough and 拿喝fine machining are perform著山ed on different machine 體知tools, and higher machining accu農冷racy is not required. therefo白笑re. It can not only give full play to t木數he performance of the eq村謝uipment, but also prolong the 要是service life of precision 笑東machine tools.

     家美3. Heat treatment is often require我廠d during machining. The a通文rrangement of the heat treatment proc靜這ess is as follows: in order動費 to improve the cutting perfo司術rmance of the metal. It is門東 usually done before m要劇achining. In order to eliminate i煙讀nternal stress, such as ann是森ealing, normalizing,店嗎 quenching and temperi為什ng, etc. Such as aging好樹 treatment and quenching and t花答empering treatment, etc., generall科機y after rough machining路樹, before finishing. In order to im家中prove the mechanical properties of the 的樹parts, carburizing, quen但美ching, tempering, etc., are generally 志月carried out after mech大船anical processing. If there is deform弟工ation after heat treatment, th舞樂e final processing procedure時麗 must be arranged.