Rolling formation method for large and medium size solid plate-shape forge piece

Abstract

The invention discloses a method for rolling and forming a large and medium-sized solid disk-shaped forging. The rolling process is: deformed metal bar material → heating → upsetting (press machine) → cake blank → pressing (press machine) → solid disk blank →heating→installation positioning (rolling machine)→axial rolling (rolling machine)→size measurement→solid disc forging. The axial rolling force of rolling is 2×105kg~5×105kg, and the widening speed is 5mm / s~15mm / s. The dimensions of the rolled disc forgings are: outer diameter Φ800mm~Φ3000mm, axial thickness 30mm~250mm. And by changing the shape and size of the cone surface of the cone roll, disc-shaped forgings with different disc surfaces and cavities can be rolled. This method can realize the continuous local plastic deformation forming of disc-shaped forgings, and use small equipment to dry large forgings.

Description

technical field

[0001] The invention relates to a rolling forming method of forgings, in particular to a rolling forming method of large and medium-sized solid disc-shaped forgings. Background technique

[0002] Large and medium-sized disc-shaped forgings, such as compressor discs and turbine discs for heavy-duty ground gas turbines, are currently mainly used in the world for heavy-duty hydraulic presses for die forging or free forging. Large and medium-sized disc forgings are formed by hydraulic press forging due to the following shortcomings It is difficult to forge and promote the application of disc forgings:

[0003] The tonnage required for the equipment is large. For general deformed metal materials such as structural steel, stainless steel and other disc-shaped forgings, 5×10 7 kg (50,000 tons) heavy-duty hydraulic presses can be forged; for disc-shaped forgings of hard-to-deform metal materials such as hard-to-deform high-temperature alloys, even 1×10 8 The heavy-...

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