【文章內(nèi)容簡(jiǎn)介】 +34+20+55+5415=188 有上數(shù)可知,則所選則的壓力機(jī)符合要求。五、模具總裝圖 7. 內(nèi)六角螺釘 . 內(nèi)六角螺釘 工作原理：該模具為倒裝復(fù)合摸，沖壓時(shí)可自動(dòng)送料，板料由卸料板5上的活動(dòng)擋料銷6擋料送進(jìn)。 工作時(shí)上模下行，由凸凹模（21）、落料凹模（20）、沖孔凸模（119）完成落料沖孔，使工件成型，工作完成后上模上行，當(dāng)滑塊碰到上死點(diǎn)時(shí)，打桿和推板開(kāi)始工作，將工件從凹模內(nèi)推出落下，沖孔廢料從工作臺(tái)孔內(nèi)直接落下。六、模具材料的選用利用模具生產(chǎn)制品零件，其模具質(zhì)量的好壞，壽命的長(zhǎng)短，直接關(guān)系到產(chǎn)品制造精度、性能和成本。模具的質(zhì)量、使用壽命、制造精度及合格率很大程度上取決于設(shè)計(jì)時(shí)對(duì)模具材料的選用、熱處理工藝要求、模具零件配合精度及公差等級(jí)的選擇和表面質(zhì)量要求。冷沖模在工作中承受沖擊、拉深、壓縮彎曲、疲勞磨擦等機(jī)械的作用。模具常常發(fā)生脆斷、堆塌、磨損、啃傷和軟化等形成的失效。因此，作為冷沖模主要材料的鋼材，應(yīng)具有的性能。1. 應(yīng)具有較高的變形抗力：主要抗力指標(biāo)包括淬火、回火抗壓強(qiáng)度、彎強(qiáng)度等。其中硬度是模具注意重要的抗力指標(biāo)，高的硬度是保持模具耐磨性的必要條件。工作零件熱處理后的硬度在60HRC強(qiáng)度和抗彎強(qiáng)度才能保證模具具有較高的變形能力。2. 應(yīng)具有較高的斷裂抗主要抗力指標(biāo)有材料的抗沖擊性能抗壓強(qiáng)度、抗彎強(qiáng)度 斷裂抗力和沖擊載荷下抵抗模具裂紋產(chǎn)生一個(gè)特性，也是作為防止斷裂的一個(gè)重要依據(jù)。其基體中碳含量越高沖擊韌性越高。故對(duì)韌性的要求應(yīng)依據(jù)載荷較大的冷沖鐓及剪切模易受偏心彎曲載荷細(xì)長(zhǎng)凸?；蛴袘?yīng)力集中的模具，都需要有較高的韌性。3. 應(yīng)具有較高的耐磨性和抗疲勞性能：對(duì)于在一定條件下工作的模具鋼，為了提高耐磨性，需要在硬度高的基體上均勻分布有大量細(xì)小硬的碳化物 相同硬度下，提高鋼的性能是模具在交變應(yīng)力條件下產(chǎn)生的疲勞破壞，如模具長(zhǎng)期使用有刮痕凹槽等4. 應(yīng)具有較好的冷、熱加工工藝性：鋼材的加工性能包括可鍛性、可加工性、淬透性、淬硬性較小的脫碳敏感性和較小變形傾向等，以方便模具的加工，易于成形及防止熱處理后變形等?？偵纤觯和?、凹模采用工作部分局部淬火材料也用淬火變形小的Cr12MoV模具鋼。七、結(jié) 論這次的畢業(yè)設(shè)計(jì)是大學(xué)學(xué)習(xí)中的最后一個(gè)環(huán)節(jié)，是對(duì)三年的學(xué)習(xí)生活中所學(xué)的知識(shí)一個(gè)匯總和概括，使我們每個(gè)人都能總合運(yùn)用所學(xué)的知識(shí)。在校期間，開(kāi)設(shè)有《機(jī)械設(shè)計(jì)》、《機(jī)械制造》等課程，這些課程有電子的，有專業(yè)課程設(shè)計(jì)的，對(duì)我們搞好這次畢業(yè)設(shè)計(jì)有很大的幫助。即將畢業(yè)的我，在以后的工作中難免會(huì)遇到一些問(wèn)題或麻煩，這時(shí)就要靠自己以前所學(xué)的知識(shí)和積累的經(jīng)驗(yàn)去解決它。此外，我們應(yīng)該樹(shù)立良好的設(shè)計(jì)思想，重視對(duì)自己進(jìn)行機(jī)械設(shè)計(jì)能力的培養(yǎng)；繼續(xù)加強(qiáng)設(shè)計(jì)方面的知識(shí)的學(xué)習(xí)。因水平有限，設(shè)計(jì)中必然有許多不足之處，還望老師批評(píng)指正。參考文獻(xiàn)[1]..[2]..[3]..[4]..[5].，機(jī)械工業(yè)出版社 1998[6]..[7]..[8]..[9]..[10].[11]..[12]..為你提供優(yōu)秀的畢業(yè)論文參考資料，請(qǐng)您刪除以下內(nèi)容，O(∩_∩)O謝謝?。?！A large group of tea merchants on camels and horses from Northwest China39。s Shaanxi province pass through a stop on the ancient Silk Road, Gansu39。s Zhangye city during their journey to Kazakhstan, May 5, 2015. The caravan, consisting of more than 100 camels, three horsedrawn carriages and four support vehicles, started the trip from Jingyang county in Shaanxi on Sept 19, 2014. It will pass through Gansu province and Xinjiang Uygur autonomous region, and finally arrive in Almaty, formerly known as AlmaAta, the largest city in Kazakhstan, and Dungan in Zhambyl province. The trip will cover about 15,000 kilometers and take the caravan more than one year to plete. The caravan is expected to return to Jingyang in March 2016. Then they will e back, carrying specialty products from Kazakhstan A small art troupe founded six decades ago has grown into a household name in the Inner Mongolia autonomous region. In the 1950s, Ulan Muqir Art Troupe was created by nine young musicians, who toured remote villages on horses and performed traditional Mongolian music and dances for nomadic families. The 54yearold was born in Tongliao, in eastern Inner Mongolia and joined the troupe in says there are 74 branch troupes across Inner Mongolia and actors give around 100 shows every year to local nomadic people. I can still recall the days when I toured with the troupe in the early 39。80s. We sat on the back of pickup trucks for hours. The sky was blue, and we couldn39。t help but sing the folk songs, Nasun says. The vastness of Inner Mongolia and the lack of entertainment options for people living there, made their lives lonely. The nomadic people were very excited about our visits, Nasun recalls. We didn39。t have a formal stage. The audience just sat on the grass. Usually, the performances became a big party with local people joining in. For him, the rewarding part about touring isn39。t just about sharing art with nomadic families but also about gaining inspiration for the music and dance. Ulan Muqir literally translates as red burgeon, and today39。s performers of the troupe still tour the region39。s villages and entertain nomadic families, but their fame has spread around the world. On May 16 and 17, nearly 100 singers and dancers from the troupe performed at Beijing39。s Poly Theater. Their show, titled Ulan Muqir on the Grassland, depicted the history and development of the art troupe. Being from the region allowed me to embrace the culture of Inner Mongolia and being a member of the troupe showed me where I belonged, Nasun, the art troupe39。s president, who is also a renowned tenor, tells China Daily. During a tour in 1985, he went to a village and met an elderly local man, who told him a story about his friendship with a solider from Shenyang, capital of Northeast China39。s Liaoning province, decades ago. The solider gave the old man a handmade saddle when they bid farewell. The story inspired Nasun to write Carved Saddle, a song that later became one of his most popular numbers. Now, every year, Nasun recruits young singers and dancers for the troupe. The troupe has also designed a new repertoire, which is mostly based on the daily lives of Mongolian people, especially the lives of nomadic families,