关 键 词：

说明书+CAD 铰链 固定 模具设计 说明书 CAD

资源描述：

购买设计请充值后下载，，资源目录下的文件所见即所得，都可以点开预览，，资料完整，充值下载可得到资源目录里的所有文件。。。【注】：dwg后缀为CAD图纸，doc,docx为WORD文档，原稿无水印，可编辑。。。具体请见文件预览，有不明白之处，可咨询QQ:12401814

内容简介：

外文翻译专 业 名 称 机械设计制造及其自动化班 级 学 号 078105232学 生 姓 名 冼 振 源指 导 教 师 陈 为 国填 表 日 期 2011 年 1 月 17 日General all-steel punching dies punching accuracyAccuracy of panel punching part is display the press accuracy of the die exactly. But the accuracy of any punching parts linear dimension and positional accuracy almost depend on the blanking and blanking accuracy,. So that the compound mould of compound punchings accuracy, is typicalness and representation in the majority.Analyse of the dies accuracy For the analyse of pracyicable inaccuracy during production of dies to inactivation, we could get the tendency when it is augmentation in most time. From this we could analyse the elements. When the new punch dies pt into production to the first cutter grinding, the inaccuracy produced called initial error; if the die grinding more than twenty times, until its discard, the inaccuracy called conventional error; and before the dies discard, the largest error of the last batch permit, called limiting error. at job site, the evidence to confirm life of sharpening is the higher of the blanking, punched hole or punched parts. Because all finished parts had been blanked ,so it is especially for the compound dies. Therefore, the analyse of burr and measurement is especially important when do them as enterprise standardization or checked with .The initial error usually is the minimal through the whole life of die. Its magnitude depend on the accuracy of manufacture, quality, measure of the punching part, thickness of panel, magnitude of gap and degree of homogeneity. The accuracy of manufacture depend on the manufacture process. For the 1 mm thicked compound punching part made in medium steel, the experimental result and productive practice all prove that the burr of dies which produced by spark cutting are higher 25%30% than produced by grinder ,NC or CNC. The reason is that not only the latter have more exact machining accuracy but also the value of roughness Ra is less one order than the formmer, it can be reached 0.025m. Therefore, the dies initial blanked accuracy depends on the accuracy of manufacture, quality and so on. The normal error of the punch die is the practicable error when the fist cutter grinding and the last cutter grinding before the die produce the last qualified product. As the increase of cutter grinding, caused the measure the nature wear of the dies are gradual increasing, the error of punching part increase also, so the parts are blew proof. And the die will be unused. The hole on the part and inner because the measure of wear will be small and small gradually, and its outside form will be lager in the same reason. Therefore, the hole and inner form in the part will be made mould according to one-way positive deviation or nearly equal to the limit max measure. In like manner, the punching parts appearance will be made mould according to one-way negative deviation or nearly equal to limit mini measure. For this will be broaden the normal error, and the cutter grinding times will be increased, the life will be long. The limit error in punching parts are the max dimension error which practicable allowed in the parts with limit error. This kind of parts usually are the last qualified products before the die discard.For the all classes of dies, if we analyse the fluctuate, tendency of increase and decrease and law which appeared in the dies whole life, we will find that the master of the error are changeless; the error that because the abrade of the cutter and impression will be as the cutter grinding times increased at the same time. And that will cause the error oversize gradually; and also have another part error are unconventional , unforeseen. Therefore, every die s error are composed of fixed error, system error, accident error and so on. 1. fixed error At the whole process when the New punching die between just input production to discard, the changeless master error that in qualified part are called fixed error. Its magnitude is the deviation when the die production qualified products before the first cutter grinding. Also is the initial error, but the die have initial punching accuracy at this time. Because of the abrade of parts, the die after grinding will be change the dimension error. And the increment of deviation will oversize as the times of cutter grinding. So the punching accuracy after cutter grinding also called “grinding accuracy” and lower tan initial accuracy. The fixed error depend on the elements factor as followed :(1) the material , sorts, structure, (form) dimension, and thick of panelthe magnitude of punching gap and degree of homogeneity are have a important effect for the dimension accuracy. Different punching process, material, thick of panel, have completely different gap and punching accuracy. A gear H62 which made in yellow brass with the same mode number m=0.34, 2mm thick and had a center hole, when the gap get C=0.5%t (single edge) , and punched with compound punching die, and the dimension accuracy reached IT7, the part have a flat surface ,the verticality of tangent plane reached 89.5, its roughness Ra magnitude are 12.5m, height of burr are 0.10mm; and the punching part are punched with progressive die, the gap C=7%t (single edge) , initial accuracy are IT11, and have an more rough surface, even can see the gap with eyes. In the usual situation, flushes a material and its thickness t is theselection punching gap main basis. Once the designation gap haddetermined flushes the plane size the fixed error main body; Flushesthe structure rigidity and the three-dimensional shape affects itsshape position precision.(2) punching craft and molder structure typeUses the different ramming craft, flushes a precision and the fixederror difference is really big. Except that the above piece gearexample showed, the essence flushes the craft and ordinary punching flushes a precision and the fixed error differs outside a magnitude,even if in ordinary punching center, uses the different gap punching, thefixed error difference very is also big. For example material thickt=1.5mm H62 brass punching, selects C = the 40%t unilateral I kind ofsmall gap punching compared to select C 4mm flushes, the size precision can lower some. Different dies structure type, because is suitable the rammingmaterial to be thick and the manufacture precision difference, causesto flush a fixed error to have leaves. Compound die center, multi-locations continuous type compound die because flushes continuously toduplicate the localization to add on the pattern making error to bebigger, therefore it flushes a fixed error compound punching die to wantcompared to the single location Big 1 2 levels (3) the craft of punching dies manufacturethe main work of punching die namely are raised, the concave moldprocessing procedure, to operates on the specification not to behigh, can time form a more complex cavity. But its processing surfaceapproximately is thick 0.03 0.05mm is the high temperatureablation remaining furcated austenite organization, degree ofhardness may reach as high as HRC67 70, has the micro crack, easilywhen punching appears broke the cutter or flaking. The Italian CorradaCorporations related memoir called the line cut the processing contruction to have the disadvantageous influence to the superficialgold, in fact already changed the gold contruction. We must use theJingang stone powder to grind or the numerical control continual pathcoordinates rub truncate (cut to line) to make the precision work . In recent years country and so on Switzerland and Japan, has conductedthe thorough research to the electrical finishing equipment and abigger improvement, makes function complete high accuracy NC and theCNC line cutter, the processing precision may reach 0.005 0.001mm,even is smaller. The processing surface roughness Ra value can achieve0.4 mu m. According to the recent years to the domestic 12 productionlines cutter factory investigation and study, the domesticallyproduced line cutter processing precision different factory differentmodel line cutter might reach 0.008 0.005mm, generally all in0.01mm or bigger somewhat, was individual also can achieve0.005mm, the processing surface roughness Ra value was bigger than1.6m. However, the electrical finishing ablation metal surface thus the change and the damage machined surface mental structure character can not change, only if with rubs truncates or other ways removes this harmful level. Therefore, merely uses electricity machining, including the spark cutting and the electricity perforation, achieves with difficulty punching, especially high accuracy, high life punching die to size precision and work components surface roughness Ra value request. With precisely rubs truncates the law manufacture punching die, specially makes the high accuracy, the high life punching die, such as: Thin material small gap compound punching die, multi- locations continuous type compound die and so on, has the size precision high, the work component smachined surface roughness Ra value is small, the mold life higher characteristic. Its processing craft at present changed the electrical fire by the past ordinary engine bed rough machining spark cutting or the electricity puncher rough machining, finally precisely rubs truncates, also from takes shape rubs, optics curve rubs, the manual grid reference rubs gradually filters the continual path grid reference to rub and NC and the CNC continual path grid reference rubs, Processing coarseness may reach 0.001 0.0005mm, the processing surface roughness Ra value may reach 0.1 0.025 mu m. Therefore, with this craft manufacture the die , regardless of the size precision, the work components surface roughness, all can satisfy die, each kind of compound request, the die is especially higher than the electrical finishing craft manufacture scale.(4) gap size and degree of homogeneity the flange and other sheet forming sgene rally all must first punching (fall material) the plate to launch the semi finished materials, after also has the forming to fall the material, the incision obtains the single end product to flush. Therefore punching the work, including is commonly used punching hole, the margin, cut side and so on, regarding each kind of sheet pressing partall is necessary. Therefore punching the gap to flushes a out form in chprecision to have the decisive influence. punching the gap small and is even, may cause punching the size gain high accuracy. Regarding drawability, is curving and so on mould, the gap greatly will decide increases flushes the oral area size error and the snapping back. The gapnon-uniformity can cause to flush a burr enlarges and incurs cutting edge the non-uniform attrition. (5) ramming equipment elastic deformation In the ramming process After the punch press load bearing can have the certain elastic deformation. Although this kind of distortion quantity according to flushes the pressure the size to change also to have the obvious directivity, but on the pressing part, mainly is to has the volume ramming archery target stamping, embosses, the equalization, the pressure is raised, the wave, flushes crowds, the shape, the flange, hits flatly, thinly changes draw ability and so on the craft work punching forming flushes, has the significant influence to its ramming aspect size precision普通全钢冲模的冲压精度分析板料冲压件的精度准确显示出其冲模的冲压精度。而任何冲件的线性尺寸精度与形位精度主要取决于冲模冲裁和立体成形冲压件展开平毛坯的落料精度。因此，多工步复合冲压的单工位复合模、多工位连续模的冲压精度，在普通冲压的众多种类与不同结构的冲模中，最具典型性和代表性。冲模的冲压精度分析对冲模投产至失效报废各个时期冲件的实际误差分析，可以看出其增大的时期及趋向，从而分析其增大的因素。新冲模投产至第一次刃磨前冲制冲件的误差即所谓的初始误差；冲模经过20次左右刃磨至失效报废前冲制的冲件误差称之为常规误差；而冲模失效报废前冲制的最后一批合格冲件的允许最大误差称之为极限误差。在现场，确定冲模刃磨寿命的依据是冲件冲孔与落料的毛刺高度。由于任何成形件都具有冲裁作业（毛坯落料或冲孔），对于复合模尤为如此。所以，冲件毛刺高度的触模检查和测量并按企业标准或JB4129-85冲压件毛刺高度对照检测就显得十分重要。冲模的初始误差通常是冲模整个寿命中冲件误差最小的。其大小主要取决于冲模的制造精度与质量及冲件尺寸、料厚以及间隙值大小与均匀度。冲模的制造精度及质量又取决于制模工艺。对于料厚t1mm的中碳钢复合冲裁模冲件，实验结果与生产实践都证明，电火花线切割制造的冲模冲件毛刺高度比用成型磨或NC与CNC连续轨迹座标磨即精密磨削工艺制造的冲模冲件要高25%30%。这是因为后者不仅加工精度高，而且加工面粗糙度Ra值要比前者小一个数量级，可达到0.025m。因此，冲模的制造精度与质量等因素决定了冲模的初始冲压精度，也造就了冲件的初始误差。冲件的常规误差是冲模经第一次刃磨到最后一次刃磨后冲出最后一个合格冲件为止，冲件实际具有的误差。随着刃磨次数的增加，刃口的自然磨损而造成的尺寸增量逐渐加大，冲件的误差也随之加大。当其误差超过极限偏差时，冲件就不合格，冲模也就失效报废。/冲件上孔与内形因凸模磨损尺寸会逐渐变小；其外形落料尺寸会因凹模磨损而逐渐增大。所以，冲件上孔与内形按单向正偏差标允差并依接近或几乎等于极限最大尺寸制模。同理，冲件外形落料按单向负偏差标注允差并依接近或几乎等于极限最小尺寸制模。这样就使冲件的常规误差范围扩大，冲模可刃磨次数增加，模具寿命提高。冲件的极限误差是具有极限偏差的冲件所具有的实际允许的最大尺寸误差。这类冲件通常是在冲模失效报废前冲制的最后一批合格冲件。对各类冲模冲件误差在冲模整个寿命中出现的波动、增减趋向及规律等进行全面分析便可发现：冲件误差的主导部分是不变的；因刃口或型腔的自然磨损而出现的误差增量随冲模刃磨冲数增加而使这部分误差逐渐加大；还有部分误差的增量是非常规的、不可预见的。所以，各类冲模冲件误差是由因定误差、渐增误差、系统误差及偶发误差等几部分综合构成。1、固定误差新冲模在指定的冲压设备上投入使用至失效报废的整个（总）寿命过程中，其合格冲件误差的主导部分固定不变即所谓固定误差。其大小就是新冲模第一次刃磨前冲制的合格冲件的偏差，也即冲模的初始误差，而此时的冲模具有初始冲压精度。刃磨后的冲模，因其工作零件（凸、凹模）磨损而改变尺寸误差，使冲件识差增量随刃磨次数增加而逐渐加大，故冲模刃磨后的冲压精度亦称“刃磨精度”比其初始精度要低。冲模冲件的固定误差取决于以下各要素：（1）冲件的材料种类、结构（形状）尺寸及料厚冲裁间隙的大小及其均匀度对冲裁件的尺寸精度有决定性的影响。不同冲裁工艺、不同材料种类与不等料厚，间隙相差悬殊，冲压精度差异很大。同一种模数m=0.34的2mm的料厚、中心有孔的H62黄铜材料片齿轮复合模冲件，当取间隙C=0.5%t（单边），用复合精冲模冲制，冲件尺寸精度达到IT7级，冲件平直无拱弯，冲切面垂直度可达89.5，其表面粗糙Ra值为0.2m；而用普通复合模冲制，间隙C=5%t（单边），冲件初始误差亦即冲模的初始冲压精度为1T9级，冲切面粗糙度Ra值为12.5m，毛刺高度为0.10mm；还是这个冲件用连续模冲制，间隙C=7%t（单边），初始冲件精度为IT11级，冲切面更粗糙，甚至有肉眼可见的台阶。通常情况下，冲件材料及其厚度t是选取冲裁间隙的主要依据。一旦选定间隙就确定了冲件的平面尺寸的固定误差的主体；冲件结构刚度及立体形状则影响其形位精度。（2）冲压工艺及冲模结构类型采用不同的冲压工艺，冲件的精度及固定误差相差甚大。除上述片齿轮实例说明，精冲工艺与普通冲裁的冲件精度与固定误差相差一个数量级之外，即便在普通冲裁中，采用不同间隙冲裁，固定误差相差也很大。例如料厚t=1.5mm的H62黄铜冲裁件，选用C40%t单边类小间隙冲裁比选用C8%t（单边）类大间隙冲裁，冲件固定误差将加大40%60%，精度至少降一级。此外，采有无搭边排样，冲件的误差要远大于有搭边排样冲件。无搭边排样冲件。无搭边排样冲件的精度低于IT12级，而多数有搭边排样的冲件精度在IT11IT9级之间，料厚t4mm的冲件，尺寸精度会更低一些。不同冲模结构类型，由于适用冲压料厚及制造精度的差异，导致冲件的固定误差有别。复合模中，多工位连续式复合模由于冲件连续重复定位加上制模误差较大，故其冲件的固定误差比单工位复合冲裁模要 大12级。（3）冲模制造工艺冲模主要工作零件即凸、凹模的加工程序，对操作上的技术要求不高，能够一次成形较复杂的模腔。但其加工表面约厚0.030.05mm为高温烧蚀的残余树枝状奥氏体组织，硬度可高达HRC6770，有显微裂纹，容易在冲裁时出现崩刃或剥落。意大利Corrada公司的有关研究报告称“线切割加工对表面金相结构产生不利的影响，实际上已经改变了金相结构。我们必须用金刚石粉研磨或数控连续轨迹坐标磨削（对线切割件）作精加工”。近年来瑞士和日本等国，对电加工设备进行了深入的研究和较大的改进，制造出功能齐全的高精度NC和CNC线切割机，加工精度可达0.0050.001mm，甚至更小。加工表面粗糙度Ra值能达到0.4m。根据近年对国内12家生产线切割机工厂的调研，国产线切割机加工精度各别厂家的各别型号线切割机可达0.0080.005mm，一般都在0.01mm或更大一些，个别也能达到0.005mm，加工表面粗糙度Ra值均大于1.6m。然而，电加工烧蚀金属表面从而改变和损坏加工面金相结构的特性不会改变，除非用磨削或其他加工法去除这一有害层。所以，仅仅用电加工法，包括电火花线切割与电穿孔，难以达到冲模，尤其高精度、高寿命冲模对尺寸精度与工作零件表面粗糙度Ra值要求。用精密磨削法制造冲模，特别是制造高精度、高寿命冲模，诸如：薄料小间隙复合冲裁模、多工位连续式复合模等，具有尺寸精度高、工作零件加工面粗糙度Ra值小、模具寿命高等特点。其加工工艺目前已由过去的普通机床粗加工改为电火花线切割或电穿孔机粗加工，最后精密磨削，也由成型磨、光学曲线磨、手动座标磨逐步过滤到连续轨迹座标磨及NC与CNC连续轨迹座标磨，加工粗度可达0.0010.0005mm，加工表面粗糙度Ra值可达0.10.025m。所以，用该工艺制造的冲模，无论尺寸精度、工作零件表面粗糙度，都能满足冲模，尤其各种复合模的要求，比电加工工艺制造的冲模高一个档次。（4）间隙的大小与均匀度拉深、弯曲、翻边及其他板料成形件一般都要先冲裁（落料）出平板展开毛坯，也有成形后落料、切开得到单个成品冲件。故冲裁作业，包括常用的冲孔、切口、切边等，对于每种板料冲压件都是必要的。所以冲裁间隙对冲件的外廓尺寸精度有决定性的影响。冲裁间隙小而均匀，可使冲裁尺寸获取更高精度。对于拉深、弯曲等成形模，间隙大定将增大冲件口部尺寸误差及回弹。间隙不均匀会使冲件毛刺加大并招致刃口的不均匀磨损。（5）冲压设备的弹性变形在冲压过程中，冲床承载后会产生一定的弹性变形。虽然这种变形量依冲压力的大小变化且具有明显的方向性，但就冲压件，主要是对具有体积冲压性质的压印、压花、校平、压凸、起波、冲挤、镦形、翻边、镦粗、打扁、变薄拉深等工艺作业冲制成形的冲件，对其冲压方面的尺寸精度有重大影响。上铰链固定板折V型模设计绪 论目前，我国冲压技术与工业发达国家相比还相当的落后，主要原因是我国在冲压基础理论及成形工艺、模具标准化、模具设计、模具制造工艺及设备等方面与工业发达的国家尚有相当大的差距，导致我国模具在寿命、效率、加工精度、生产周期等方面与工业发达国家的模具相比差距相当大。改革开放以来，随着国民经济的高速发展，市场对模具的需求量不断增长。近年来，模具工业一直以15左右的增长速度快速发展，模具工业企业的所有制成分也发生了巨大的变化，除了国有专业模具厂外，集体、合资、独资和私营也得到了快速的发展。浙江宁波和黄岩地区的模具之乡；广东一些大集团公司和迅速崛起的乡镇企业，科龙、美的、康佳等集团纷纷建立了自己的模具制造中心；中外合资和外商独资的模具企业现已有几千家。随着我国经济的迅速发展，采用模具的生产技术得到愈来愈广泛的应用。近年来，随着我国经济的腾飞和产品制造业的蓬勃发展，模具制造业也相应进入了高速发展的时期。据中国模具工业协会统计，1995年我国模具工业总产值约为145亿，而2003年已达450亿左右，年均增长14%。另据统计，我国（不含台湾、香港、澳门地区）现有模具生产厂点已超过20000家，从业人员有60万人，模具年产值在一亿以上的企业已达十多家。可以预见，我国经济的高速发展将对模具提出更为大量、更为迫切的需求，特别需要发展大型、精密、复杂、长寿命的模具。同时要求模具设计、制造和生产周期达到全新的水平。我国模具制造业面临着发展的机遇，无疑也面临着更大的挑战。大学三年的学习即将结束，毕业设计是其中最后一个实践环节，是对以前所学的知识及所掌握的技能的综合运用和检验。随着我国经济的迅速发展，采用模具的生产技术得到愈来愈广泛的应用。在完成大学三年的课程学习和课程、生产实习，我熟练地掌握了机械制图、机械设计、机械原理等专业基础课和专业课方面的知识，对机械制造、加工的工艺有了一个系统、全面的理解，达到了学习的目的。对于模具设计这个实践性非常强的设计课题，我们进行了大量的实习。经过在新飞电器有限公司、在洛阳中国一拖、中信重型矿山机械厂的生产实习，我对于冷冲模具、塑料模具的设计步骤有了一个全新的认识，丰富和加深了对各种模具的结构和动作过程方面的知识，而对于模具的制造工艺更是有了全新的理解。在指导老师的细心指导下和在工厂师傅的讲解下，我们对于模具的设计和制造工艺有了系统而深刻的认识。同时在实习现场亲手拆装了一些典型的模具实体并查阅了很多相关资料，通过这些实践，我们熟练掌握了模具的一般工作原理、制造、加工工艺。通过在图书馆借阅相关手册和书籍，更系统而全面了细节问题。锻炼了缜密的思维和使我们初步具备了设计工作者应有的素质。毕业设计要达到的具体要求是：1.系统总结，巩固过去所学的基础知识和专业课知识。2. 运用所学知识解决模具技术领域内的实际工程问题，以此进行综合知识的训练。3.通过某项具体工程设计和实验研究，达到多种综合能力的培养，掌握设计和科研的基本过程和基本方法。4.提高和运用与工程技术有关的人文科学，价值工程和技术经济的综合知识。设计中，将充分利用和查阅各种资料，并与同学进行充分讨论，尽最大努力搞好本次毕业设计。 在设计的过程中，将有一定的困难，但有指导老师的悉心指导和自己的努力，相信会完满的完成毕业设计任务。由于学生水平有限，而且缺乏经验，设计中不妥之处在所难免，恳请各位老师指正。 设计者：张衍才 2007.04.01上铰链固定板折V型模设计摘要本设计题目为折型模设计，体现了典型折型模的设计要求、内容及方向，有一定的设计意义。通过对该零件模具的设计，进一步加强了设计者弯曲模设计的基础知识，为设计更复杂的弯曲模具做好了铺垫和吸取了更深刻的经验。本设计运用弯曲成型工艺及模具设计的基础知识，首先分析了板材的性能要求，为选取模具的类型做好了准备；然后计算了弯曲件的弯曲力，便于选取压力机吨位及确定压力机型号；最后分析了弯曲件的特征，确定模具的设计参数、设计要点及顶出装置的选取。本设计采用了单工序弯曲模成型型件。单工序模模具结构简单，成本低等特点，特别适合小批量单件生产。成型原理如下：，凸模与凹模共同作用成型形件；这种机构动作灵活可靠，设计方便，非常适合在本副模具中使用。单工序弯曲模的通用性能好，且制造简单。容易保证制件精度。关键词 单工序模 弯曲模 凸模 凹模 On the hinge plate packs V Modular DesignAbstractThe requirement ，content and direction of the design of the bending dies parts are embodied on this bending dies design. The designers foundation knowledge of the bending dies design is reinforced and is able to design more complex injection mould through the design. Through the foundation knowledge, firstly, the composion and the perfourmance of the flat sheet is analyzed to choose the type of the mould. Secondly, the volume of the bend is estimated to choose the press molding machine and to detemine the type press machine and tonnage of press. Lastly the character of the part is analyzed to determine the mould design parameter and design point and choose the ejection assembly. Single operation dies is used in this design to form the v part.the compound die can produce pierced blanks to close flatness and dimensional tolerances.So, it is adapted to be used on this mould extraordinarily.The single work preface curves the in general use function of the mold good, and the manufacturing is in brief.An accuracy of easy assurance system.Keywords Single operation dies bending dies punch matrix工件名称：上铰链固定板工件简图：如图所示生产批量：大批量材 料：45材料厚度：2.5 mm图1第1章 上铰链固定板件工艺性分析及工艺方案的确定1. 1上铰链固定板工艺性分析 此型工件为典型弯曲件。材料为Q235钢，具有良好的弯曲性能适合弯曲成型加工。工件结构简单，除了几个尺寸为公差等级IT14级有严格要求外其余尺寸均为自由公差，工件整体上看，尺寸精度较低，普通弯曲成型完全能满足要求。第2章 主要工艺参数计算2.1工件毛坯坯料尺寸的计算 L= + 式中: L工件毛坯长度（mm）; 工件各直线段长度之和（mm）; 工件各部分（圆弧部分）应变中性层展开长度之和（mm）;图2 由图可知：L=L1+L2+L3式中：L1 第一段直线部分应变中性层长度（mm）L2中间圆弧部分应变中性层长度（mm）L3第二段直线部分应变中性层长度（mm） 其中：L1、 L3可以由制件得来L1=2mm, L3=18 mm查模具设计大典3得公式如下：L2=1.57式中：应变中性层的曲率半径（mm）；其中：= r+X t式中：X中性层位移系数，查冲压模具设计与制造教程，表3.4.1得X=0.26；所以：=1.5+0.252.5 =2.125mm所以：L2=1.572.125 =3.336 mm 毛坯长度：L=2 +3.336+18 =23.336 mm2.2 弯曲应力的计算该模具工件属于自由弯曲成型，所以形件弯曲力： = 式中：自由弯曲在冲压行程结束时的弯曲力(N); B弯曲件的宽度,B=22 mm; t 弯曲材料的厚度(mm); r 弯曲件的内弯曲半径(mm); 材料的抗拉强度(MPa); K安全系数,一般取K=1.3。 = =12065.625N 2.3 压料力的计算根据公式(3.5.4),如果弯曲模设有顶出装置或压料装置时,其顶出力可以近似取自由弯曲力的30% 80%即: =(0.3 0.8) 在此取: =0.6 =0.6 12065.625 =7239.375 N2.4 压力机公称压力的确定根据公式(3.5.5)即: (1.2 1.3) (+)考虑到弯曲工件板料较厚,而且板宽也较大,压力机公称压力应取值偏大为宜。在此取:1.3(+) =1.3(12065.625+7239.375) =25096.5 N根据计算结果,查表2-3初选压力机为：J23-10。第3章 折V型模工作部分设计归根到底,其设计为型弯曲种类,所以,其设计可按型件设计方法设计。3.1 凸、凹模间隙的计算由弯曲部分的知识可知：型件弯曲模的凸、凹模间隙是靠调整压力机的闭合高度来控制的，设计时可以不予考虑。而单面间隙计算如下：单面间隙为Z/2 Z/2=（1+n）t =(1+0.05) 2.5 =2.1mm（查表得n=0.05）3.2 凹模深度 底部最小厚度图3凹模深度过小,则坯料两端受压部分太多,工件回弹大,而且不平直,影响工件质量。如果过大,则浪费模具钢材,且需冲床有较大的工作行程。形件弯曲模：凹模深度L0及底部厚度可以查表3.9.1。但应该保证凹模开口宽度LA之值不能大于弯曲坯料展开长度的0.8倍。由前面计算可知弯曲件边长L=L1+L2+L3 =2+3.336+18 =23.336 mm据边长L=23.336 mm 查表19.3-18得: =15 mm h =22mm3.3 凸、凹模工作部分尺寸：3.3.1 凸、凹模宽度尺寸计算：L=(L-0.75) =(22-0.750.62) =21.535L=( L-Z) =(21.535-2.1) =19.435L22即，凹模的宽度应该不大于展开长度的0.8倍59。 所以符合要求。3.3.2 凸、凹模的圆角半径以及凹模的深度一般情况下，凸模的圆角半径因为, 值较小,所以取=r=0.5 mm查表可知：凹模的圆角半径r=10mm. 凹模的深度L=18mmV形凹模的底部可开退刀槽或取圆角半径r为：根据实际生产经验可知: 当t = 2 4 mm 时, =(2 3) t从保证制件精度要求考虑,特别是所设计的弯曲单工序模值不宜取大值。在此取：2 t22.55 mm 。第4章 模具总体设计4.1 模具类型的选择由冲压工艺性可知，采用单工序冲压，模具类型为单工序模。4.2 定位方式的选择为保证坯料在弯曲模内准确定位，也为在弯曲过程中坯料的偏移，提高定位精度，采用定位板和定位销。4.3 卸料出件方式的选择 此工件为等于的V形件，成形后留在凹模上，随凸模上行底部受压的弹簧弹性恢复推动顶杆而顶出制件。4.4 导向方式的选择模具属于单工序冲模，结构简单，导向精度通过凸、凹模就可以保证，所以采用无导向装置。 综上可设计此模具主要由，模柄、上模板、凸模、V形凹模、下模板等组成。 初步计算模具闭合高度模具闭合高度 H=155mm凹模座的外轮廓尺寸约计为125mm100mm根据上述公称压力的计算，选用公称压力是40KN的压力机就行了。但该工件凸、凹模长度较大，为了满足闭合高度的要求选择100KN的J23-10型号的压力机。第5章 设备的选定该零件所需的弯曲力 12.0655KN模具闭合高度 H=155mm模具外廓尺寸 130mm100mm 由前面压力机公称压力计算初选的压力机型号：J23-10，查模具实用技术手册表2-3得压力机主要技术参数如下：公称压力：100 KN ；滑块行程：45 mm ；最大闭合高度：180 mm ；最大装模高度：180 mm ；连杆调节长度：35 mm ；工作台尺寸（前后左右）：130 mm 200 mm ；垫板尺寸（厚度）：35 mm ；模柄孔尺寸：30 mm 60 mm ；最大倾斜角度： 根据模具闭合高度，弯曲力，外廓尺寸等数据选定J23-10型号此设备是合适的。 第6章 模具主要零部件的设计6.1 凸模部分 折V型模没有固定的结构形式，此工件结构简单，精度要求不高，所以可以设计比较简单一些，根据制件形状可以将凸模设计为整体式凸模。 L=20 mm r=0.5mm 制件宽度为22mm。取凸模高度为：L=h+h+t+h =20+40+0.5+30 =90.5 mm取95mm所以确定凸模尺寸为20mm100mm95mm 画草图如下： 图4 凸模草图 6.2 凹模部分 工件弯曲角度为901。考虑的回弹因素。即回弹角为2。取凹模底部圆角为88。凹模的圆角半径r=5mm. 凹模的深度L=18 mmV形凹模的底部可开退刀槽或取圆角半径r为：r=5 mm查表得V形端底部到凹模的底部的距离 h=22 mm，所以确定取凹模厚度H= h+15=37mm（取40） 凹模壁厚 C=35 mm 凹模宽度 :B=b+2c=22+70=92 mm 取标准值B=100 mm确定凹模尺寸为125 mm100 mm 40 mm根据凹模尺寸选定上、下模座尺寸分别为125mm100 mm40 mm和125mm100mm50 mm。 画草图如下： 图5 凹模 草图第7章 模具总装配图由以上设计，可得到如下图所示的模具总装图。 图6 模具总装图模具工作过程：坯料由定位板固定在凹模面上，压力机滑块带着上模下行，凸模下表面先接触毛坯料，使它弯曲成两直边成901的V形制件，当工件底部接触到顶杆，使底部弹簧受压。凸模回升时，依靠弹簧的