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五金冲压模模具寿命影响因素的分析


MOJUCAILIAODUIMOJUSHOUMINGDEYINGXIANGSHICAILIAOZHONGLEI、HUAXUECHENGFEN、ZUZHIJIEGOU、YINGDUHEYEJINZHILIANGDENGZHUGANGSUODEZONGHEFANYING。BUTONGCAIZHIDEMOJUSHOUMINGWANGWANGBUTONG。WEICI,DUIYUCHONGMOGONGZUOLINGJIANCAILIAOTICHULIANGXIANGJIBENYAOQIU:①CAILIAODESHIYONGXINGNENGYINGJUYOUGAOYINGDU(58~64HRC)HEGAOQIANGDU,BINGJUYOUGAODENAIMOXINGHEZUGOUDERENXING,RECHULIBIANXINGXIAO,YOUYIDINGDEREYINGXING;②GONGYIXINGNENGLIANGHAO。CHONGMOGONGZUOLINGJIANJIAGONGZHIZAOGUOCHENGYIBANJIAOWEIFUZA.YINERBIXUJUYOUDUIGEZHONGJIAGONGGONGYIDESHIYINGXING,RUKEDUANXING、KEQIEXUEJIAGONGXING、CUIYINGXING、CUITOUXING、CUIHUOLIEWENMINGANXINGHEMOXUEJIAGONGXINGDENG。TONGCHANGGENJUCHONGYAJIANDECAILIAOTEXING、SHENGCHANPILIANG、JINGDUYAOQIUDENG,XUANZEXINGNENGYOULIANGDEMOJUCAILIAO,TONGSHIJIANGUQIGONGYIXINGHEJINGJIXING。

澳门足彩 5 REJIAGONGGONGYI

实践证明.模具的热加工质量对五金冲压模具的性能与使用寿命影响甚大。从模具失效原因的分析统计可知,因热处理不当所引发模具失效“事故”约占40%以上。模具工作零件的淬火变形与开裂,使用过程的早期断裂,均与摸具的热加工工艺有关。

(1)锻造工艺,这是模具工作零件制造过程中的重要环节。对于高合金工具钢的模具,通常对材料碳化物分布等金相组织提出技术要求。此外,还应严格控制锻造温度范围,制定正确的加热规范,采用正确的锻造力法,以及锻后缓冷或及时退火等。
(2)预备热处理。应视模具工作零件的材料和要求的不同分别采用退火、正火或调质等预备热处理工艺, 以改善组织,消除锻造毛坯的组织缺陷,改善加工工艺性。高碳合金模具钢经过适当的预备热处理可消除网状二次渗碳体或链状碳化物,使碳化物球化、细化,促进碳化物分布均匀性。这样有利于保证淬火、回火质量,提高模具寿命。
(3)淬火与回火。这是模具热处理中的关键环节。若淬火加热时产生过热,不仅会使工件造成较大的脆性,而且在冷却时容易引起变形和开裂,严重影响模具寿命。冲模淬火加热时特别应注意防止氧化和脱碳,应严格控制热处理工艺规范,在条件允许的情况下,可采用真空热处理。淬火后应及时回火,并根据技术要求采用不同的回火工艺。
(4)消应力退火。模具工作零件在粗加工后应进行消应力退火处理,具目的是消除粗加工所造成的内应力,以免淬火叫产生过大的变形和裂纹。对于精度要求高的模具,在磨削或电加工后还需经过消应力回火处理,有利于稳定模具精度,提高使用寿命。

澳门足彩 6 JIAGONGBIAOMIANZHILIANG

澳门足彩 MOJUGONGZUOLINGJIANJIASHANGBIAOMIANZHILIANGDEYOULIEDUIYUMOJUDENAIMOXING、KANGDUANLIENENGLIJIKANGZHANZHENENGLIDENGYOUZHESHIFENMIQIEDEGUANXI,ZHIJIEYINGXIANGMOJUDESHIYONGSHOUMING。YOUQISHIBIAOMIANCUCAODUZHIDUIMOJUSHOUMINGYINGXIANGHENDA,RUOBIAOMIANCUCAODUZHIGUODA,ZAIGONGZUOSHIHUICHANSHENGYINGLIJIZHONGXIANXIANG,BINGZAIQIFENG、GUJIANRONGYICHANSHENGLIEWEN,YINGXIANGCHONGMODENAIYONGDU,HAIHUIYINGXIANGGONGJIANBIAOMIANDENAISHIXING,ZHIJIEYINGXIANGCHONGMODESHIYONGSHOUMINGHEJINGDU,WEICI,YINGZHUYIYIXIASHIXIANG:①MOJUGONGZUOLINGJIANJIAGONGGUOCHENGZHONGBIXUFANGZHIMOXUESHAOSHANGLINGJIANBIAOMIANXIANXIANG,YINGYANGEKONGZHIMOXUEGONGYITIAOJIANHEGONGYIFANGFA(RUSHALUNYINGDU、LIDU、LENGQUEYE、JINJILIANGDENGCANSHU);②JIAGONGGUOCHENGZHONGYINGFANGZHIMOJUGONGZUOLINGJIANBIAOMIANLIUYOUDAOHEN.JIACENG、LIEWEN、ZHUANGJISHANGHENDENGHONGGUANQUEXIAN。ZHEIXIEQUEXIANDECUNZAIHUIYINQIYINGLIJIZHONG,CHENGWEIDUANLIEDEGENYUAN,ZAOCHENGMOJUZAOQISHIXIAO;③CAIYONGMOXUE、YANMOHEPAOGUANGDENGJINGJIAGONGHEJINGXIJIAGONG,HUODEJIAOXIAODEBIAOMIANCUCAODUZHI,TIGAOMOJUSHIYONGSHOUMING。

7 BIAOMIANQIANGHUACHULI

为提高五金冲压模具性能和使用寿命,模具工作零件表面强化处理应用越来越广。常用的表而强化处理方法有:液体碳氮共渗、离子渗氮、渗硼、渗钒和电火花强化,以及化学气相沉积法(CVD)、物理气相沉积法(PVD)和在盐浴中向工件表面浸镀碳化物法(TD)等。此外,采用高频淬火,液压、喷丸等表面强化处理,使模具工作零件表面产生压应力,提高其耐疲劳强度,有利于模具寿命的提高。

澳门足彩 8 XIANQIEGEBIANZHICENGDEKONGZHI

澳门足彩 CHONGMORENKOUDUOCAIYONGXIANQIEGEJIAGONG。YOUYUXIANQIEGEJIAGONGDEREXIAOYINGHEDIANJIEZUOYONG,SHIMOJUJIAGONGBIAOMIANCHANSHENGYIDINGHOUDUDEBIANZHICENG,ZAOCHENGBIAOMIANYINGDUJIANGDI,CHUXIANXIANWEILIEWENDENG,ZHISHIXIANQIEGEJIAGONGDECHONGMOYIFASHENGZAOQIMOSUN,ZHIJIEYINGXIANGMOJUCHONGCAIJIANXIDEBAOCHIJIRENKOURONGYIBENGREN,SUODUANMOJUSHIYONGSHOUMING。YINCI,ZAIXIANQIEGEJIAGONGZHONGYINGXUANZEHELIDEDIANGUIZHUN,JINLIANGJIANSHAOBIANZHICENGSHENDU。

澳门足彩 9 ZHENGQUESHIYONGHEHELIWEIHU

WEILEBAOHUZHENGCHANGSHENGCHAN,TIGAOCHONGYAJIANZHILIANG,JIANGDICHENGBEN,YANZHANGCHONGMOSHOUMING,BIXUZHENGQUESHIYONGHEHELIWEIHUMOJU,YANGEZHIXINGCHONGMO“SANJIANCHA”ZHIDU(SHIYONGQIANJIANCHA,SHIYONGGUOCHENGZHONGJIANCHAYUSHIYONGHOUJIANCHA),BINGZUOHAOCHONGMOYUWEIHUJIANXIUGONGZUO。QIZHUYAOGONGDINGZUOBAOKUOMOJUDEZHENGQUEANZHUANGYUDIAOSHI;YANGEKONGZHITUMOJINRUAOMOSHENDU;KONGZHIXIAOZHENGWANQU、LENGJI、ZHENGXINGDENGGONGXUSHANGMODEXIAZHIDIANSHENZHI;JISHIFUMO、YANGUANGQIJURENKOU;ZHUYIBAOCHIQIJUDEQINGJIEHEHELIDERUNHUADENG。MOJUDEZHENGQUESHIYONGHEHELIWEIHU,DUIYUTIGAOMOJUSHOUMINGSHIGUANZHONGDA。 ZONGZHI,ZAIMOJUSHEJI、ZHIZAO、SHIYONGHEWEIHUQUANGUOCHENGZHONG,YINGYONGXIANJINZHIZAOJISHUHESHIXINGQUANMIANZHILIANGGUANLI,SHITIGAOMOJUSHOUMINGDEYOUXIAOBAOZHENG,BINGQIEZHILIYUFAZHANZHUANYEHUASHENGCHAN,JIAQIANGMOJUBIAOZHUNHUAGONGZUO,CHULINGJIANBIAOZHUNHUAWAI,HAIYOUSHEJICANSHUBIAOZHUNHUA、ZUHEXINGSHIBIAOZHUNHUA、JIAGONGFANGFABIAOZHUNHUADENG,BUDUANTIGAOMOJUSHEJIHEZHIZAOSHUIPING,YOULIYUTIGAOMOJUSHOUMING。

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