How to Make a Hydraulic Forging Press Dies

Forging is a metalworking technique in which gradual pressure is applied to a die containing metal and squeezed with slow strokes to form desired shapes without sudden impacts from power hammers.

Mechanical presses utilize flywheel and screw systems to convert rotary energy into linear force, and some include knockout/liftout pins in their die to quickly expel any forging from the machine.

Frame

A forging press's frame is designed to evenly and efficiently distribute pressure from its ram, as well as protect its operator. Safety features in a forging press include safety doors, correction gates, limit switches and manual control valves for operator protection. A hydraulic cylinder applies unidirectional stroke force while an oil tank stores hydraulic fluid. Finally, its ram can move between die and anvil for shaping metal parts either openly or closedly allowing uniform plastic deformation of workpieces.

Forged metals offer both superior strength and corrosion resistance. Prior to forging, they are heated so as to optimize grain structure and decrease porosity, with forging costs being relatively expensive and heavy equipment required for forging processes. While forging can create complex shapes not achievable through other techniques, forging cannot create complex exterior designs and must only be performed using limited metals.

Servo motor forging relies on precise control to minimize waste and enhance quality in finished products, saving energy, increasing die life span, increasing productivity and speeding up forging operations when compared with conventional mechanical presses. This technology also eliminates lubrication needs allowing faster forging than its counterpart.

A forging press is a machine that applies gradual, controlled pressure to a die holding the workpiece during its formation process. It provides more precise results than traditional drop forging methods involving repeated blows from hammers; its slow stroke movement allows more metal to enter deeper into its die and undergo uniform plastic deformation.

There are various types of forging presses, including friction drives, gear drives and direct electric drive forging presses. Friction drives rely on a flywheel and gear assembly to generate force while gear drive forging presses use a screw equipped with a slipping clutch to reverse rotation direction. A direct electric drive forging press features an integral reversible electric motor designed specifically to reverse direction - such a configuration could also provide sufficient reversing power if necessary.

Forging press dies are constructed of materials capable of withstanding high temperatures and stresses associated with forging, such as stainless steel or titanium alloys. These hard yet resilient alloys often make great forging press dies. Stainless steel boasts superior corrosion resistance and high strength, but is more difficult to work than other materials because its melting temperature needs to be higher in order to form new forms. Titanium stands out as one of the strongest metals, both in terms of weight-to-strength ratio and strength-to-density. Unfortunately, its brittle nature makes forging more challenging; nonetheless, a forging press may still be used to produce it; preheating must occur before use in order to preserve integrity and optimize grain flow properties. Aluminum is more costly than other materials and must therefore usually be combined with other metals when forging it, and must also be heat treated to reduce its natural ductility to prevent breaking or tearing under excessive squeezing forces imposed by forging presses.