【正文】 需要大家齊心協(xié)力共同完成，這是一個(gè)過程，更是一個(gè)整 體。在經(jīng)過還原之后銅粉塊就成了純凈的無氧無雜質(zhì)的銅基粉塊了，之后對(duì)其進(jìn)行的是破碎處理，在破碎環(huán)節(jié)需開啟古風(fēng)機(jī)，破碎機(jī)，在破碎時(shí)同樣要注意下料的速度，不宜太快，否則容易燒壞電動(dòng)機(jī)導(dǎo)致生產(chǎn)中斷。 3 第 3 章 實(shí)習(xí)小結(jié) 一個(gè)月的實(shí)習(xí)看似短暫卻又不那么簡(jiǎn)單，時(shí)間雖然短，但卻使我收獲非常多，人生的第一份工作，第一次的工作經(jīng)歷，第一次面對(duì)老師學(xué)生這種單純師生關(guān)系以外的關(guān)系，這種經(jīng)歷，這種感覺真的只有當(dāng)你走過風(fēng)景時(shí)才能體會(huì)得到，以后的人生路也許很長(zhǎng)，所面對(duì)的工作也會(huì)相對(duì)穩(wěn)定并一成不變，但這一個(gè)月，卻 是我人生積淀的開始，從新開始，從新出發(fā)，我們需要感謝更需要銘記，有些逝去的風(fēng)景和旅途在下一站的航程里也許不會(huì)再見，所以相遇就當(dāng)懷念。盡管在某些場(chǎng)合，工件無承受情況下，使用移動(dòng)式裝備來實(shí)現(xiàn)加工，但大多數(shù)的機(jī)械加工是通過既支承工件又支承刀具的 裝備來完成。許多零件，如果用別的其他方法來生產(chǎn)屬于大批量生產(chǎn)的話，那么在機(jī)械加工中則是屬于低公差且又能滿足要求的小批量生產(chǎn)了。為了有效地加工，切削速度高低必須適應(yīng)特定的工件 —— 刀具配合。粗加工比起精加工來，吃刀深度較深。未變形切屑厚度的增加趨勢(shì)必導(dǎo)致通過工件的熱的總數(shù)上產(chǎn)生比例效應(yīng)，刀具和切屑仍保持著固定的比例，而切削溫度變化傾向于降低。該項(xiàng)技術(shù)是建立在高速鋼刀具截面金相顯微測(cè)試基礎(chǔ)上，目的是要建立顯微結(jié)構(gòu)變化與熱 變化規(guī)律圖線關(guān)系式。在大多數(shù)實(shí)際切削條件下，由于主前刀面先于副前刀面磨損，磨損到達(dá)足夠大時(shí)，刀具將實(shí)效，結(jié)果是制成不合格零件。 刀具的主后刀面磨損帶的 尾部是跟未加工過的工件表面相接觸，因此后刀面磨損比沿著磨損帶末端處更為明顯，那是最普通的。以下幾種現(xiàn)象之一均是刀具嚴(yán)重失效開始的特征：最普遍的是切削力突然增加，在工件上出現(xiàn)燒損環(huán)紋和噪音嚴(yán)重增加等 。因此，生產(chǎn)的最后階段，裝配因生產(chǎn)計(jì)劃、批量和產(chǎn)品設(shè)計(jì)的變更而顯得特別脆弱。最后，必須計(jì)算、調(diào)整、組裝可拆裝的或標(biāo)準(zhǔn)夾具元件的所需位置，以便使工件牢牢地被夾緊在夾具中。 9 The Introduction of Machining I. INTRODUCTION Have a shape as a processing method, all machining process for the production of the most monly used and most important method. Machining process is a process generated shape, in this process, Drivers device on the workpiece material to be in the form of chip removal. Although in some occasions, the workpiece under no circumstances, the use of mobile equipment to the processing, However, the majority of the machining is not only supporting the workpiece also supporting tools and equipment to plete. Machining know the process has two aspects. Small group of lowcost production. For casting, fing and machining pressure, every production of a specific shape of the workpiece, even a spare parts, almost have to spend the high cost of processing. Welding to rely on the shape of the structure, to a large extent, depend on effective in the form of raw materials. In general, through the use of expensive equipment and without special processing conditions, can be almost any type of raw materials, mechanical processing to convert the raw materials processed into the arbitrary shape of the structure, as long as the external dimensions large enough, it is possible. Because of a production of spare parts, even when the parts and structure of the production batch sizes are suitable for the original casting, Fing or pressure processing to produce, but usually prefer machining. Strict precision and good surface finish, Machining the second purpose is the establishment of the high precision and surface finish possible on the basis of. Many parts, if any other means of production belonging to the largescale production, Well Machining is a lowtolerance and can meet the requirements of small batch production. Besides, many parts on the production and processing of coarse process to improve its general shape of the surface. It is only necessary precision and choose only the surface machining. For instance, thread, in addition to mechanical processing, almost no other processing method for processing. Another example is the blacksmith pieces keyhole processing, as well as training to be conducted immediately after the mechanical pletion of the processing. Ⅱ . Primary Cutting Parameters Cutting the work piece and tool based on the basic relationship between the following four elements to fully describe : the tool geometry, cutting speed, feed rate, depth and peration of a cutting tool. Cutting Tools must be of a suitable material to manufacture, it must be strong, tough, hard and wearresistant. Tool geometry to the tip plane and cutter angle characteristics for each cutting process must be correct. Cutting speed is the cutting edge of work piece surface rate, it is inches per minute to show. In order to effectively processing, and cutting speed must adapt to the level of specific parts with knives. Generally, the more hard work piece material, the lower the rate. 10 Progressive Tool to speed is cut into the work piece speed. If the work piece or tool for rotating movement, feed rate per round over the number of inches to the measurement. When the work piece or tool for reciprocating movement and feed rate on each trip through the measurement of inches. Generally, in other conditions, feed rate and cutting speed is inversely proportional to. Depth of peration of a cutting tool to inches dollars is the tool to the work piece distance. Rotary cutting it to the chip or equal to the width of the linear cutting chip thickness. Rough than finishing, deeper peration of a cutting tool depth. Ⅲ . Wears of Cutting Tool We already have been processed and the rattle of the countless cracks edge tool, we learn that tool wear are basically three forms : flank wear, the former flank wear and VNotch wear. Flank wear occurred in both the main blade occurred vice blade. On the main blade, shoulder removed because most metal chip mandate, which resulted in an increase cutting force and cutting tem