CNC Four Corner Crimping Machine, LM4-CNC-100*1800*3000 Four-head corner combining machine CNC for aluminum door and window(Vertical) 1. Automatic hydraulic crimping of all 4 corners in one operation. 2. The crimping heads can be positioned exactly by a 3-axis control (both vertical axis are working synchronously) 3. Depth of each crimping head is individually adjustable. 4. Vertical configuration of the machinery facilities enormously the handling of the pre-assembled and completely crimped elements. 5. The imported controlling CNC system with high quality ensures the speed and accuracy. 6. Ball screw ensure moving precision.