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    来源:青岛东和科技    发布时间:2020-01-03http://www.doohe.com/ 16:06    阅读量:98

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      贝博体育app官方下载贝博体育app网页版贝博体育官方下载app在我们生活中有着非常重要的应用,那么大家是否了解贝博体育app官方下载贝博体育app网页版贝博体育官方下载app模具安装时需要注意什么吗?下面详细为大家介绍:

      (1)模具安装使用前应严格检查,清除脏物,检查模具的导向套和模具是否润滑良好。(2)定期对贝博体育官方下载app的转盘及模具安装底座进行检查,确保上下转盘的同轴精度。(3)按照模具的安装程序将凸凹模在转盘上安装好,保证凸凹模具的方向一致,特别是具有方向要求的(非圆形和正方形)模具更要用心,防止装错、装反。(4)模具安装完后,应检查模具安装底座各紧固螺钉是否锁紧无误。(5)贝博体育官方下载app模具的凸模和凹模刃口磨损时应停止使用,及时刃磨,否则会迅速扩大模具刃口的磨损程度,加速模具磨损,降低冲件质量和模具寿命。(6)对于批量生产所使用的通用模具,应有备份,以便轮换生产,保证生产所需。(7)冲压人员安装模具应使用较软的金属(如铜、铝等)制成操作工具,防止安装过程中敲、砸时损坏模具。(8)模具运送过程中要轻拿轻放,决不允许乱扔乱碰,以免损坏模具的刃口和导向。(9)模具使用后应及时放回指贝博体育官方下载app模具使用中常见问题:

      (1)凸模磨损太快

      主要原因:①模具间隙偏小,一般建议模具总间隙为材料板厚的20%~250700②凸凹模具的对中性不好,包括模座和模具导向组件及贝博体育app网页版镶套精度不足等原因造成模具对中性不好。③凸模温度过高,主要是由于同一模具连续长时间冲压造成冲头过热。④模具刃磨方法不当,造成模具退火,磨损加剧。⑤局部的单边冲切,如步冲、冲角或剪切时,侧向力会使冲头偏向一边,该边的间隙减小,造成模具磨损严重,如果机床模具安装精度不高,严重的会使冲头偏过下模,造成凸模和凹模损坏。

      (2)模具带料问题

      模具带料会造成废料反弹,其相关因素:

      ①模具刃口的锋利程度,刃口的圆角越大,越容易造成废料反弹。②模具的入模量,机床每个工位的入模量是一定的,模具入模量小,容易造成废料反弹。③模具的间隙是否合理,如果模具间隙不合适,容易造成废料反弹。④被加工板材表面是否存在较多的油物。⑤弹簧疲劳损坏。

      防止模具带料的方法:

      ①使用专用的防带料凹模。②模具经常刃磨保持锋利,并退磁处理。③增大凹模间隙。④采用斜刃口模具代替平刃口模具。⑤模具安装退料器。⑥合理增大模具的入模量。⑦检查模具弹簧或卸料套的疲劳强度。

      (3)模具对中性问题贝博体育app官方下载贝博体育官方下载app模具

      模具在使用中容易发生冲芯各侧位置的磨损量不同,有的部分有较大划痕,磨损较快,这种情况在细窄的长方模具上特别明显。该问题主要原因:

      ①机床贝博体育app网页版设计或加工精度不足,主要是上下转盘的模具安装座的对中性不好。②模具的设计或加工精度不能满足要求。③模具凸模的导套精度不够。④模具间隙选择不合适。⑤模具安装座或模具导套由于长期使用磨损造成对中性不好。

      为防止模具磨损不一致,应:

      ①定期采用对中芯棒对机床贝博体育app网页版和安装座进行对中性检查调整。②及时更换模具导套并选用合适间隙的凸凹模具。③采用全导程模具。④加强操作人员的责任心,发现后及时查找原因,避免造成更大损失。

      (4)特殊成形模具使用

      为满足生产需要,经常需要使用成形模具或特殊模具,主要有桥形模具、百叶窗模具、沉孔形模具、翻孔攻螺纹模具、凸台模具、拉伸模具、组合式模具等,使用特殊或成形模具可以大大提高生产效率,但是成形模具价格较高,通常【FS:PAGE】是普通模具的4~5倍。为避免失误,应注意和遵循以下原则:

      ①模具安装时进行方向检查,确保模具凸凹模安装方向一致。②根据要求正确调整模具的冲压深度,每次调整最好不超过0.15mmhttp://www.doohe.com/ 。③使用较低的冲切速度。④板材要平整无变形或翘起。⑤成形加工位置应尽量远离夹钳。⑥成形模具使用时应避免向下成形操作。⑦冲压时按照先普通模具冲压,最后使用成形模具。

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