Figure 8 mold assembly
The high strength of the closed bed ensures the precision stability required for stamping.
As shown in Figure 7, the middle part is the main cylinder, which is connected with the lead screw and the guide rail, and the lower end is connected with the striking head. One end of the lead screw is connected with a servo motor (Y1 shaft), and the servo motor drives the main cylinder and the striking head to move on the guide rail. , select the lower mold position, ready to punch.
Below the striking head is a mold library, which is driven by a Y2 axis servo motor to perform mold position positioning, and is matched with the X-direction sheet feeding position to complete the hole position positioning. After positioning, punching work can be performed.
The lower hopper is located in the bed, the waste falls onto the lowermost conveyor conveyor, and the waste is collected by the chip conveyor into the waste trolley outside the bed.
4. Mold library
The mold library consists of upper and lower mold bases and 20 sets of molds. Through three movements, the mold selection, punching position and punching work are completed. The first is the Y2 movement of the mold library. This movement completes the positioning of the mold along the width direction of the board. Then the Y1 of the main cylinder moves, so that the main cylinder moves to the top of the selected mold, ready for punching. Finally, the mold is selected and the mold is in the mold. There are 2 rows of molds before and after, and each has 1 set of selected mold cylinders and selected mold blocks. Each time the mold is selected, only one mold block extends above one upper mold, indicating that the mold is selected.
The mold assembly is mainly composed of a punching punch, upper and lower die holders for the upper and lower molds, motors, guide rails, lead screws and a frame for carrying these components. The connection between the upper and lower mold bases is rigid, and they can be moved together with the upper and lower molds; the gap between the lower mold base and the base is maintained, and the lower mold base is connected with the slider through the connecting plate, and the base is connected with the guide rails. In this way, the relative sliding of the base and the lower mold base is realized by the sliding of the slider and the guide rail. The punching force is carried by the base, and the guide rail and the slider are not subjected to the punching force to protect the guide rail and the slider from damage.
In the normal state (without punching), the gap between the connecting plate and the transition plate is maintained by the tension of the disc spring, which is larger than the gap between the base and the lower die holder. At the moment of punching, when the downforce is increased enough to offset the tension of the disc spring, the clearance between the base and the lower die holder is eliminated, and the gap between the connecting plate and the transition plate is reduced from large to large; when the downward pressure becomes small to disappear, the mode is The seat rises under the action of the disc spring tension until the gap between the connecting plate and the transition plate becomes small and large, and the gap between the base and the lower mold base is restored. Such a structure allows the punching force to be borne by the base, and the guide rail and the slider are not subjected to the punching force. This structure facilitates automatic mold selection and protects the rails and sliders from damage.
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