本发明涉及汽车制造技术领域，公开了一种珋接复合模具及利用珋接复合模具的珋接方法，包括下底座和冲头座，所述下底座的内侧设有限位块，所述限位块的上侧设有凹模，所述凹模内设有定位块，所述冲头座的下端卡设外层冲头，所述外层冲头内可滑动设有中顶轴，所述外层冲头的下端连接有扩张块；包括如下实施步骤：预制珋接孔，安装复合模具，向下冲压冲头座。通过对高强板预制珋接孔，方便对复合模具的定位安装，避免珋接过程中对高强板的损伤；通过扩张块对铝合金板的径向作用，实现铝合金板与高强钢的无铆钉接复合。

The invention relates to a car manufacturing technology, the public a answered composite mould and using the method of composite mould , including the base and the punch holder, as described under the base of the medial has set blocks, described upper limit block have die, die described with positioning block, as described in the lower end of the punch holder set outer punch card, inside the outer punch can slip consists of shaft, The lower end of the outer punch is connected with an expansion block; It includes the following implementation steps: prefabricate hole, install composite die, press down punch holder. Through the prefabricated connection hole of the high strength plate, it is convenient to locate and install the composite mold, and avoid the damage to the high strength plate in the connection process of ; Through the radial action of the expansion block on the aluminum alloy plate, the rivetless bonding of aluminum alloy plate with high strength steel was realized.