集成电路引线脚成形模设计

以QFP44L产品为例 ,介绍一种新型滚轮打弯π形引线脚成形模具 ,模具采用轴承滚轮机构 ,无擦伤 ,回弹小 ,并与QFP44L切筋模、分离模、90°折弯模、切边、整形模同时在1台冲切机上工作 ,辅以自动送料机构 ,完成全自动冲切。

Taking QFP44L products as a example, a new type of trolley bending-extension mould for π shaped leading wire feet forming was introduced in this paper. Bearing trolley mechanism was applied in the mould. As a result, there was no abrasion and little spring-back during the forming process. Moreover, it could work together with rib-cutting mould, separating mould, 90°bending mould, and shearing-trimming mould on the same punch at the same time. Assisted by auto-delivering mechanism, full auto-punch process could be accomplished.