Method for manufacturing suspension bridge tie rod

The invention provides a method for manufacturing a suspension bridge tie rod. The method comprises the following steps of: (1) arranging a blank on a machine tool and roughly cutting the tie rod by using a forming tool; (2) tempering and aligning; (3) roughly cutting tooth form of the tie rod by using the forming tool; and (4) finely extruding the tie rod tooth form to obtain the tie rod workpiece. The completely new method for manufacturing the suspension bridge tie rod of the invention has the advantages of high glossiness of the extrusion, high fineness of the tooth form and easiness of cutting of a material by threading, guarantees the quality and also improves the efficiency. The method is a preferred scheme for manufacturing the type of tie rods with diameter of more than phi 50 and long radius ratio of between 20 and 30; and the method grantees the quality, has high manufacturing capacity and high efficiency and is suitable for large-scale use and popularization.