【導(dǎo)讀】技術(shù)自從出現(xiàn)以來(lái)，去的了迅速的發(fā)展，現(xiàn)已廣泛應(yīng)用于工業(yè)行業(yè)。修復(fù)技術(shù)平臺(tái)，加上現(xiàn)代先進(jìn)制造、快速成型等理念，則發(fā)展成為激光再造技術(shù)。目前，不少科研單位和公司對(duì)

　　

【正文】 位于環(huán)形通道的中線上，且要盡可能沿切向切入，圖 所示，使粉末在載氣的作用下首先在環(huán)形通道內(nèi)充分混合，最后均勻地沿著環(huán)形錐道噴出。 工程學(xué)院畢業(yè)設(shè)計(jì)（論文） 第 31 頁(yè)，共 49 頁(yè) 圖 通過(guò)送粉頭零部件的設(shè)計(jì)，最終完成送粉頭的總圖設(shè)計(jì)如下圖 ： 圖 工程學(xué)院畢業(yè)設(shè)計(jì)（論文） 第 32 頁(yè)，共 49 頁(yè) 參考文獻(xiàn) 【 1】 閆毓禾，鐘敏霖 .高功率激光加工及其應(yīng)用 [M].天津 :天津科學(xué)技術(shù)出版社， 1994. 【 2】 羅濤 .載氣式超細(xì)粉末送粉器的研制 [J].天津工業(yè)大學(xué)碩士學(xué)位論文 .2020. 【 3】 劉常樂(lè) .載氣式激光熔覆送粉器的研制 [J].天津工業(yè)大學(xué)碩士學(xué)位論文 .2020. 【 4】 關(guān)振中主編 .激光加工手冊(cè) [M].北京 :中國(guó)計(jì)量出版社， 1998 【 5】 梅遂生 .德美固體激光器研究一撇 .激光與紅外 [M].1993 【 6】 99:125131 Hu S Y,LiＹＬ，Ｍ unz D,Yang Y,Y. Thermal stresses incoated structures .in laser surface handening of a medium carbon and Coatings Technoligy,1988. 【 7】 27:12401244 Piliz M, Rsidual stess induced by laser coatings。Pehenimenological analysis and Ｓ 【 8】 28:56845692 Chiu ChinChen .A method for measuring tenpwraturedependent stress and thermal expansin of 【 9】 濮良貴，紀(jì)名剛 .機(jī)械設(shè)計(jì)第八版 [M].北京 :高等教育出版社 .2020 【 10】 李柱，席紅卓 .互換性與技術(shù)測(cè)量第三版 [M].武漢 :華中科技大學(xué)出版社 .1998 【 11】 大連理工大學(xué)工程圖書(shū)教研室編 .機(jī)械制圖第六版 [M].大連 :高等教育出版社 .2020 【 12】 孫桓， 陳作模 .機(jī)械原理第七版 [M].高等教育出版社 .2020 【 13】 付水根 .機(jī)械自造工藝基礎(chǔ)第二版 [M].清華大學(xué)出版社 .2020 工程學(xué)院畢業(yè)設(shè)計(jì)（論文） 第 33 頁(yè)，共 49 頁(yè) 【 14】 楊昂岳，周湘軍 .機(jī)械制造工程學(xué) [M].國(guó)防科技大學(xué)出版社 .2020 【 15】 高淑英 .用于激光再制造的同軸送粉嘴的設(shè)計(jì)及研究 [J].天津工業(yè)大 學(xué) 碩士學(xué)位論文。 【 16】 崔海濤，李強(qiáng) .武強(qiáng) .激光快速成型及其送粉特性 [J].北京工業(yè)大學(xué)學(xué)報(bào)， 2020,28（ 3）： 341344 【 17】 徐灝 .機(jī)械設(shè)計(jì)手冊(cè) [M].北京 :機(jī)械工業(yè)出版社， 1991 【 18】 金慶同 .特種加工 [M].北京 :航空工業(yè)出版社， 2020 【 19】 朱啟業(yè) .激光精密加工 [M].北京 :機(jī)械工業(yè)出版社， 1990工程學(xué)院畢業(yè)設(shè)計(jì)（論文） 第 34 頁(yè)，共 49 頁(yè) 謝辭 本設(shè)計(jì)是在指導(dǎo)老師何彬老師和張培陽(yáng)的悉心指導(dǎo)下完成的。何老師嚴(yán)謹(jǐn)務(wù)實(shí)的治學(xué)態(tài)度、忘我的敬業(yè)精神、淵博的專(zhuān)業(yè)知識(shí)讓我獲益匪淺，對(duì)我今后的工作和學(xué)習(xí)都有極大的指導(dǎo)意義，在本次設(shè)計(jì)過(guò)程當(dāng)中，無(wú)論學(xué)習(xí)還是生活以及設(shè)計(jì)的完成過(guò)程中，他都給予我無(wú)微不至的關(guān)心和幫助，在這里對(duì)何老師表示最衷心的感謝。 同時(shí)，四年來(lái)給予我極大幫助和鼓舞周榮安老師、羅金亮老師、彭慶林老師在這里向他們表示衷心的感謝。 工程學(xué)院畢業(yè)設(shè)計(jì)（論文） 第 35 頁(yè)，共 49 頁(yè) 附錄 1 英文原文 Mechanical Design and Manufacturing Processes Mechanical design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs. It is a vast field of engineering technology which not only concerns itself with the original conception of the product in terms of its size, shape and construction details, but also considers the various factors involved in the manufacture, marketing and use of the product. People who perform the various functions of mechanical design are typically called designers, or design engineers. Mechanical design is basically a creative activity. However, in addition to being innovative, a design engineer must also have a solid background in the areas of mechanical drawing, kinematics, dynamics, materials engineering, strength of materials and manufacturing processes. As stated previously, the purpose of mechanical design is to produce a product which will serve a need for man. Inventions, discoveries and scientific knowledge by themselves do not necessarily benefit people。 only if they are incorporated into a designed product will a benefit be derived. It should be recognized, therefore, that a human need must be identified before a particular product is designed. Mechanical design should be considered to be an opportunity to use innovative talents to envision a design of a product, to analyze the system and then make sound judgments on how the product is to be manufactured. It is important to understand the fundamentals of engineering rather than memorize mere facts and equations. There are no facts or equations which alone can be used to provide all the correct decisions required to produce a good design. On the other hand, any calculations made must be done with the utmost care and precision. For example, if a decimal point is misplaced, an otherwise acceptable 工程學(xué)院畢業(yè)設(shè)計(jì)（論文） 第 36 頁(yè)，共 49 頁(yè) design may not function. Good designs require trying new ideas and being willing to take a certain amount of risk, knowing that if the new idea does not work the existing method can be reinstated. Thus a designer must have patience, since there is no assurance of success for the time and effort expended. Creating a pletely new design generally requires that many old and wellestablished methods be thrust aside. This is not easy since many people cling to familiar ideas, techniques and attitudes. A design engineer should constantly search for ways to improve an existing product and must decide what old, proven concepts should be used and what new, untried ideas should be incorporated. New designs generally have bugs or unforeseen problems which must be worked out before the superior characteristics of the new designs can be enjoyed. Thus there is a chance for a superior product, but only at higher risk. It should be emphasized that, if a design does not warrant radical new methods, such methods should not be applied merely for the sake of change. During the beginning stages of design, creativity should be allowed to flourish without a great number of constraints. Even though many impractical ideas may arise, it is usually easy to eliminate them in the early stages of design before firm details are required by manufacturing. In this way, innovative ideas are not inhibited. Quite often, more than one design is developed, up to the point where they can be pared against each other. It is entirely possible that the design which is ultimately accepted will use ideas existing in one of the rejected designs that did not show as much overall promise. Psychologists frequently talk about trying to fit people to the machines they operate. It is essentially the responsibility of the design engineer to strive to fit machines to people. This is not an easy task, since there is really no average person for which certain operating dimensions and procedures are optimum. Another important point which should be recognized is