模具的安装与l护
1?/span>安装模具Ӟ务必保证上下模的寸与方位一_(d)其是异形模Q否则会(x)造成模具的损坏?/span>
2?/span>应对模具各滑动面{加适当机a(b)润滑?/span>
3?/span>上模一定要安装CQ以免{盘旋转中模具撞滑块?/span>
4?/span>下模固定螺钉要拧紧,防止冲压中松动而啃模?/span>
5?/span>冲压板厚应和模具冲裁间隙盔R用?/span>
6?/span>避免冲头冲切刃口长度于d口长度的一半,此时模具受严重的偏裁力。容易损坏(y刃、折断等Q?/span>
7?.5mm以上板厚止步冲步距于板厚?/span>
8?/span>模具刃口用钝后要?qing)时刃磨。实验表明合理地刃磨可以使模L(fng)寿命廉数倍?/span>
①何时刃:(x)
a)当上下模刃口产生半径?/span>0.25mm左右的圆角时?/span>
b)(g)查冲孔质量,当出现较大毛刺时?/span>
c)冲孔产生异常噪音时?/span>
②刃方法:(x)使用刃磨机时Q参照刃机说明书?/span>
a)定期刃磨Q保证质量。刃时使用冷却涌Ӏ?/span>
b)采用烧结_合氧化铝砂轮,粒寸46~60Q硬?/span>D~J?/span>
c)上下q给?/span>0.03~0.08mmQ横向进l量0.13~0.25mm,U向q给?/span>2.5~3.8m/min.
d)刃磨后退处理?/span>
e)刃磨后用油石轻轻打磨成型0.03~0.05圆角?/span>
一般每ơ刃量应控制在0.1~0.2mm。模具冲头d量一般在5mm左右Q下模在2mm左右。模具刃后注意保持正确的入模量?/span>