【正文】 即沖孔、落料、彎曲三個工位。2．1 工序分析 該彎曲件結(jié)構(gòu)簡單，分析滿足普通沖裁要求，可采取沖孔，切廢，落料，彎曲來完成。4） 該工件形狀對稱,適合采用對稱彎曲。3） 該工件材料為08號優(yōu)質(zhì)碳素結(jié)構(gòu)鋼，已退火，具有較好的抗剪，抗拉強度，沖件有三處彎曲，可以看做是三次U型彎曲。 1） 該沖件尺寸齊全,無精度要求,選經(jīng)濟精度IT14級。3）該工件圖上要切掉直徑為4的兩個孔廢料,據(jù)彎曲線距離比較遠(yuǎn),所以加工過程中不會造成料的變形,所以綜上,該工件適于沖裁工藝加工。2）工件圖尺寸齊全，無精度要求，選用經(jīng)濟精度IT14級，該沖件材料為08號優(yōu)質(zhì)碳素結(jié)構(gòu)鋼，材料狀態(tài)為已退火，抗剪強度為260～60,抗拉強度為280～420,伸長率為32%，屈服強度為200。 該工件圖尺寸標(biāo)注齊全，有三次彎曲，未注圓角。通過對護(hù)板模具的設(shè)計，讓我們更透徹了解其結(jié)構(gòu)與作用，為以后設(shè)計級進(jìn)模具有重要參考價值。它可以防止碎石彈射到引擎上引發(fā)故障，坡路起伏路段上可以保護(hù)發(fā)動機，雨雪天氣也可以防銹，裝在汽車上還有隔音的功能。 progressive die。實踐證明：該模具結(jié)構(gòu)可靠，能保證產(chǎn)品質(zhì)量，對此類零件的級進(jìn)模設(shè)計有重要參考價值。護(hù)板的應(yīng)用在很多地方，比如說發(fā)動機護(hù)板，吉他護(hù)板，底盤護(hù)板…護(hù)板的工藝編程與設(shè)計制作過程是融會多種知識的綜合實踐活動，能夠鍛煉和提高我們的知識應(yīng)用能力及實踐創(chuàng)新能力。裝個了還有個隔音的功能。 選題意義：護(hù)板在保護(hù)汽車方面起到了很大作用。為什么現(xiàn)在的汽車在經(jīng)歷了一些沖撞了以后，破損不是特別大，這個就是汽車護(hù)板起到了舉足輕重的作用了。越來越多的高速公路高架橋開始投入修筑。標(biāo)題要簡明有概括性，目錄正確整齊，中、英文摘要和前言， 正文與參考文獻(xiàn)及目錄；排版格式及具體要求查看格式與要求。 this year JanuaryJune, vehicles management section and license archives management section total accepted the motor vehicle registration business 42,543 car times, which registered registration 6,905 car times, and transfer registration 3,592 car times, and change registration 1033 car times, and mortgage registration 696 car times, and cancellation registration 187 car times, and into business 980 car times, and Archives corrections 81 pieces times, and issued test qualified logo 25,429 car times, and other vehicles business 3,640 car times。 II is established motor vehicle test regulatory platform, achieved motor vehicle test full process video, and data remote regulatory。 to improve the daytoday operation and maintenance operation record of promoting causes and transfer system。evaluation of scientific development. 　　Nature security typenature security is to maintenance people of health value for target, through strengthening security based management, and risk management, and equipment management and technology supervision, ensure production in the people, and real, and system, and system, elements security reliable, and harmony unified, full control various against factors, achieved thought no slack, and management no empty document, and equipment no hidden, and system no blocked, and unit zero nonstopped. 　　Quality and efficiencyquality benefit is to adhere to the enterprise survival, profit and development business truth, adhere to the all activity is economic activity, all costs can be controlled, money should not be wasted management philosophy, management analysis, to improve management quality, improve cost control capacity and market petitiveness. 　　Innovation of science and technologyscience and technology innovation is to play the role of science and technology as the primary productive force, active use of new technologies, new materials, new processes, new equipment, increase investment in science and technology, strengthening scientific and technological training, speeding up transforming scientific and technological achievements, forming a number of proprietary technology, enhancing core petitiveness. Resourcesavingtheresources saving enterprise was to reduce coal consumption, water consumption, electricity at the core, enhance the operation of lean management to realize low consumption, high efficiency, reduce production costs. 　　Second is to strengthen the business, financial, material, information and the optimization of organization and management, saving the internal transaction costs. Harmonious development of harmonious developmentis to construct a foreign environment for development. XING refers to the internal security firm and internal management of the internal management measures are effective, harmonious. 　　Foreign currency means Enterprise coordinating development of homeopathy