When the two punches are squeezed, the blank metal is evenly deformed, and no pit phenomenon occurs. It can reduce the process force of the small end punch (protrusion), reduce the possibility of early failure of the small end punch, effectively extend the life of the mold, and improve the internal quality of the formed spiral bevel gear. The precision forging small cone angle spiral bevel gear double-action mold is characterized by multiple actions such as horizontal split mold clamping, upper and lower punch punching, mold opening and unloading on a universal single-action press. Dynamic closed mold.
When the press slider is at the top dead center, the springs are relaxed, the guide opening and closing wedge plates are connected to the upper and lower molds, and the wider lower end is open to the left and right locking mold slots), the spring is compressed, and the lower mold is at the highest point. The limit block of the upper mold is disengaged from the upper mold base-distance, and the mold is in an open state. The preform is loaded into the lower mold, and the press slider is activated to carry the upper punch. The guiding opening and closing wedge plate and the limiting block descending, the upper mold, hitting the lower mold, and the narrow section of the rear guiding opening and closing wedge plate enters between the left and right locking mold slots, and the left and right locking grooves are pushed by the spring ' The plates are closed and the upper and lower molds are locked to form a closed cavity. The press slider continues to descend, compressing successively and lowering the punch. And on the punch. The preform is then squeezed until the lower die holder touches the lower die of the lower die plate and the upper and lower punches reach the end point. The press slider stops and the workpiece is formed. The return of the press slide is raised, the guide opening and closing wedge plate/opening the left and right clamping groove plate with the oblique wedge surface), the upper mold is disengaged from the workpiece, and when the upper mold reaches the top dead center with the slider, the topping mechanism is started. The ejector rod 0 ejects the workpiece and completes a work cycle. At the top of the top bar 0 punch. During the unloading process, there is relative rotation between the workpiece and the punch, which is also necessary for the unloading of the precision forged spiral bevel gear.
Conclusion The design and manufacture of double-action closed molds forging forged spiral bevel gears on general-purpose presses is suitable for general use in general factories and has a good economic prospect.
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