(完整版)钣金中的展开计算.docx

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10、的计算方法概论钣金零件的工程师和钣金材料的销售商为保证最终折弯成型后零件所期望的尺寸，会利用各种不同的算法来计算展开状态下备料的实际长度。 其中最常用的方法就是简单的 “掐指规则 ”，即基于各自经验的算法。 通常这些规则要考虑到材料的类型与厚度， 折弯的半径和角度， 机床的类型和步进速度等等。总结起来，如今被广泛采纳的较为流行的钣金折弯算法主要有两种，一种是基于折弯补偿的算法，另一种是基于折弯扣除的算法。为了更好地理解在钣金设计的计算过程中的一些基本概念，先了解以下几点：1、折弯补偿和折弯扣除两种算法的定义，它们各自与实际钣金几何体的对应关系2、折弯扣除如何与折弯补偿相对应，采用折弯扣除算法的

11、用户如何方便地将其数据转换到折弯补偿算法3、K 因子的定义，实际中如何利用K 因子，包括用于不同材料类型时K因子值的适用范围二、折弯补偿法为更好地理解折弯补偿，请参照图 1中表示的是在一个钣金零件中的单一折弯。图 2是该零件的展开状态。折弯补偿算法将零件的展开长度(LT) 描述为零件展平后每段长度的和再加上展平的折弯区域的长度。展平的折弯区域的长度则被表示为 “折弯补偿”值(BA) 。因此整个零件的长度就表示为方程 (1) ：LT=D1+D2+BA(1)折弯区域（图中表示为淡黄色的区域）就是理论上在折弯过程中发生变形的区域。简而言之，为确定展开零件的几何尺寸， 让我们按以下步骤思考：1、将折弯

12、区域从折弯零件上切割出来2、将剩余两段平坦部分平铺到一个桌子上3、计算出折弯区域在其展平后的长度4、将展平后的弯曲区域粘接到两段平坦部分之间，结果就是我们需要的展开后的零件of backbone backbone role; to fullstrengtheningmembers youthwork, full play youthemployees in companydevelopment in theof force role; toimprove inde pende nt Commission against corruptionwork level, strengthening o

13、n enterprisebusiness key link of effectiveness monitored. , And maintain staconfidence. Future development opportunities, we more exciting fight more spirited.Employees, let us together across 2013 full of challenges and opportunitie s, to create a green, low-cost operation, full of humanecare of a

14、world-class power generation company and work hard! The occasion of the Sbility. To furtherstrengthen publicity and education, improvetheoverall legal system. We must strengthensafety management, establish and improve theeducation, supervision, and evaluation asone of the traffic safety management m

15、echanism.o conscientiously sumup the Olympic se curitycontrols,promoting integrated management to a higher level, higher standards, ahigher l evel of development. Employees, today is lunarcalendaron December 24, the oxBell is about to ring, at this timeof year, we clearly feel thepul se of the XX po

16、wer generation companyto flourish, to more clearly hearXX power generation companies mature andsymmetry breathing. Recalling pastone another across a railing, w e are enthusiastic and full ofpring Festival, my sincere wish that you and the familiesof the staff in the new year, good health,happy,happ

17、yWe will continue to improve the companys internalcontrol system, and steady improvement in ability to manage andcontrol, optimize businessprocesses, to ensure smoothprocesses, responsibilities inplace; to further strengthen internalcontrols,play a controlpost i ndepende nt oversight roleof evaluati

18、oncomplying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accorda nce with law. Deepe ning the information management to ensure fullcommunication zero resistance.o c

19、onstantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources share d; to expand Portal system application of breadth and depth, play information systemon enterpriseand SCM, technology appli catio

20、nof training, improve employees appli cation information system of capacity and level. Humanisticcare to ensure zero.To strengthening Humanities care,continue s to foster company wind clear, and gas are, and heart Shun of culture atmosphere;stre ngthening lovehel ped trapped,care difficult employees

21、;carriedout style activities, rich employees life;strengtheninghealth a nd la bour protection, organization career health medical, controlcareer against; continues to implementation psychological warningprevention system, training employees health of character, a nd stable of mood and e nterprising

22、of attitude, created friendly fraternity of Humanities environment.o stre ngthen risk management, ensure that the busi ness of zero risk. To strengthened business plans management, will businessbusiness plans cover to all level,ensure thebusito implementation State-owned asset s method, furtherspe c

23、ification business financi al management; to perfect risk tubecontrol system, achieved risk recognition, and measure, and assessment, and report, andcontrol feedbackof closed ring management, improve risk prevention ca pacity.To further standardize trading, and strive to achieve according to law, st

24、andardize and fair. Innovation of performance management, to ensure thatpotential employees zero fly. To stre ngthe n performance management, proce ss control, enhance employee evaluation a nd levels of effective communication to improve performance management. To further quantify and refine employe

25、e standards . Work, full playparty, and branch, and members in five type Enterprise construction in theof core r ole, and fighting fortress role and pione er model role; tocontinues to strengthe ning four good leadershipconstruction, full play levelscadre s in enterprisedevel opment in the图 15. K-因子

26、法K- 因子是描述钣金折弯在广泛的几何形状参数情形下如何弯曲/ 展开的一个独立值。也是一个用于计算在各种材料厚度、折弯半径/ 折弯角度等广泛情形下的弯曲补偿 (BA) 的一个独立值。图 4和图 5将用于帮助我们了解 K-因子的详细定义。of backbone backbone role; to fullstrengthening members youthwork, full play youthemployees incompanydevelopment iconfidence. Future development opportunitie s, we more exciting figh

27、t more spirited.Employees, let us together an theof force role; toimprove inde pende nt Commission against corruptionwork level, strengthening on enterprisebusiness key link of effectiveness monitored. , A nd maintain stability. To furtherstrengthen publicity and education, improvetheoverall legal s

28、ystem. We must strengthensafety management, establish and improve theeducation, supervision, and evaluation asone of the traffic safety management mechanism.o conscientiously sumup t he Olympic securitycontrols,promoting integrated management to a higher level, higher standards, ahigher l evel of de

29、velopment. Employees, today is lunarcalendaron December 24, the oxBell is about to ring, at this timeof year, we clearly feel thepulse of the XX power generation companyto flourish, to more clearly hearXX power generation companies mature andsymmetry breathing. Recalling pastone another across a rai

30、ling, w e are enthusiastic and full ofcross 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humanecare of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the familiesof the staff in the

31、new year, good health,happy,happyWe will continue to improve thecompanys internal control system, and steady improvement in a bility to manage andcontr ol, optimize businessprocesse s, to ensure smooth processes, responsibilities in pla ce; to further strengthen internalcontr ols,play a control post

32、 independent oversight roleof evaluationcom plying with third-party responsibility; to actively make useof internal audit tools detect potential management, streamline, standardize related transactions, strengtheningoperations in accordance with law. Deepening the information management to ensure fu

33、llcommunicationzero resistance.o constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system appli cationof breadth and depth, play information system on enterpr

34、ise of Assistant role; to perfect daily rand SCM, technology applicationof training, improve employees appli cation informationsystem of capacity and level. Humanistic care to e nsure zero.To strengtheningHumanities care,continues to foster company wind clear, and gas are, and heart Shun of culture

35、atmosphere; strengthening lovehelped trapped,care difficult employees; carried out style activities, rich employees life; strengtheni ng hea lth and labourprotection,organizati oncareer health medi cal, controlcareer against; continues t o implementation psychological warning prevention system, trai

36、ning employees health of character, a nd stable of mood and enterprising of attitude,created friendly fraternity of Humanities environment. To stre ngthe n risk management, ensure that the businessof zero risk. To stre ngthened business plans management, willbusiness businessplanscover to all level,

37、 ensure thebusi ness canto implementation State-owned assets method, furtherspe cification business financi al management; to perfect risk tubecontrol system, achieved risk recognition, and measure, and assessment, and report, andcontrol feedbackof closed ring management, improve risk prevention cap

38、acity.To further standardize trading, and strive to achieve according to law, standardize and fair. Innovation of performance management, to ensure thatpotential employees zero fly. To strengthen performance management, proce ss control, enhance employee evaluation and levels of effective communicat

39、ion to improve performance management. To further quantify and refine employee standards . Work, full playparty, a nd branch, and members in five type Enterprise construction in theof core role, and fighting fortress role and pione er model role; to continues to strengthening four good leadershipcon

40、struction, full play levelscadres in enterprise development in the 无锡职业技术学院毕业设计说明书（论文）我们可以肯定在钣金零件的材料厚度中存在着一个中性层或轴，钣金件位于弯曲区域中的中性层中的钣金材料既不伸展也不压缩， 也就是在折弯区域中唯一不变形的地方。 在图 4和图 5中表示为粉红区域和蓝色区域的交界部分。在折弯过程中， 粉红区域会被压缩， 而蓝色区域则会延伸。如果中性钣金层不变形，那么处于折弯区域的中性层圆弧的长度在其弯曲和展平状态下都是相同的。所以，BA(折弯补偿 ) 就应该等于钣金件的弯曲区域中中性层的圆弧的长度。该

41、圆弧在图 4中表示为绿色。钣金中性层的位置取决于特定材料的属性如延展性等。假设中性钣金层离表面的距离为 “t”，即从钣金零件表面往厚度方向进入钣金材料的深度为 t 。因此，中性钣金层圆弧的半径可以表示为 (R+t). 利用这个表达式和折弯角度， 中性层圆弧的长度 (BA) 就可以表示为：BA = Pi*(R+T)A/180为简化表示钣金中性层的定义， 同时考虑适用于所有材料厚度， 引入 k-因子的概念。具体定义是： K-因子就是钣金的中性层位置厚度与钣金零件材料整体厚度的比值，即：K = t/T因此， K 的值总是会在 0和 1之间。一个 k- 因子如果为 0.25 的话就意味着中性层位于零件

42、钣金材料厚度的 25%处，同样如果是 0.5 ，则意味着中性层即位于整个厚度 50%的地方，以此类推。综合以上两个方程，我们可以得到以of backbone backbone rol e; to full strengthe ning members yout h work, fullplay youth empl oyees in company developme nt in the of force role; to improve inde pe nde nt Commission against corruption work level,strengthe ningon enter

43、prise business key linkof effectivenessmonitored. , And maintain stability. To further strengthe n publicity and education, improve the overall legal system. We must strengthen safety management, establish a nd im prove the education, supervision, and evaluation asone of the traffic safety managemen

44、t mechanism.o conscientiously sum up the Olympic se curity controls, promoting integrated management to ahigher level, higher standards, a higher level of developme nt. Employees, today is lunar calendar onDecem ber 24, the ox Bell is about to ring, at this timeof year, we cle arly feel the pulse of

45、 the XX power generation company to flouri sh, to moreclearly hear XX power generation compa nies mature and symmetry breathing. Recalling pastone a not her across a railing, we are enthusiastic and full ofconfi dence. Future developme nt opportunitie s, we more exciting fight more spirited.Employee

46、s, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humanecare of a world-class power generation company and work har d! The occasion of the Spring Festival, my sincere wish that you and the familiesof the staff in the new year, good he

47、alth,happy,happy 3We will continue to improve the companys internalcontrol system, and steady improvement in ability to manage andcontrol, optimize businessprocesses, to ensure smoothprocesses, responsibilities inplace; to further strengthen internalcontrols,play a controlpost i ndepende nt oversigh

48、t roleof evaluationcomplying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accorda nce with law. Deepe ning the information management to ensure fullcommunication ze

49、ro resistance.o constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources share d; to expand Portal system application of breadth and depth, play information systemon enterpriseand SCM, techn

50、ology appli cationof training, improve employees appli cation information system of capacity and level. Humanisticcare to ensure zero.To strengthening Humanities care,continue s to foster company wind clear, and gas are, and heart Shun of culture atmosphere;stre ngthening lovehel ped trapped,care di

51、fficult employees;carriedout style activities, rich employees life;strengtheninghealth a nd la bour protection, organization career health medical, controlcareer against; continues to implementation psychological warningprevention system, training employees health of character, a nd stable of mood and e nterprising of attitude, created friendly fraternity of Humanities environment.o stre ngthen risk management, ensure that the busi ness of zero risk. T