Manufacturing process of connecting rod of steering axle

Abstract

The invention discloses a manufacturing process of a connecting rod of a steering axle. According to the manufacturing method, an alloy steel bar comprises the following chemical components in percentages by mass: C greater than or equal to 1.57% but less than or equal to 2.54%, Si greater than or equal to 1.25% but less than or equal to 1.35%, Mn greater than or equal to 0.35% but less than or equal to 0.65%, Mg greater than or equal to 0.45 but less than or equal to 0.65%, P greater than or equal to 0.025 % but less than or equal to 0.035%, Al greater than or equal to 1.3% but less than or equal to 1.6%, S greater than or equal to 0.012% but less than or equal to 0.025%, T greater than or equal to 0.20% but less than or equal to 0.35%, Mo greater than or equal to 0.025% but less than orequal to 0.040%, Ni greater than or equal to 0.1% but less than or equal to 0.2%, V greater than or equal to 0.012% but less than or equal to 0.024% and the balance of Fe and inevitable impurities. Aforge piece produced by the process method is small in allowance, the utilization ratio of the material can be improved effectively, the integrity of a metal flow line of the forge part is guaranteedand the mechanical properties of tissues of the forge part are enhanced; the pressure required by forging is also relatively small, and the forging period of the forge piece is shortened effectively.

Description

technical field [0001] The invention mainly relates to the technical field of steering axles, in particular to a manufacturing process of steering axle connecting rods. Background technique [0002] In the prior art, the forging of the steering axle is usually produced by free forging or traditional die forging. However, the forgings produced by free forging have low material utilization rate, poor heat treatment hardenability, basically cut off the metal flow line, and the mechanical properties and uniformity of the structure cannot be guaranteed. Traditional die forging methods include upsetting, punching, die forging and other processes. Forgings produced by traditional die forging methods must have punching core materials, and because the inner and outer walls of forgings have a large draft angle, the forging allowance Large, so there is also the problem of low material utilization; in addition, the metal flow line will be cut off during the process of machining forging...

AI Technical Summary

Problems solved by technology

However, the forgings produced by free forging have low material utilization rate, poor heat treatment hardenability, basically cut off the metal flow line, and the mechanical properties and uniformity of the structure cannot be guaranteed.

Traditional die forging methods include upsetting, punching, die forging and other processes. Forgings produced by traditional die forging methods must have punching core materials, and because the inner and outer walls of forgings have large draft angles, the forging allowance Large, so there is also the problem of low material utilization; in addition, the metal flow line will be cut off during the process of machining forgings, the processing technology is more cumbersome, the production efficiency is not high, and there is a large draft on the side wall of the forging When the inclination is increased, the flow resistance of the metal in the forging mold cavity increases, and greater equipment pressure is required during forging

[0003] The steering axle for forklift is one of the main parts on the steering axle of the forklift. It can make the forklift drive stably and transmit the driving direction sensitively. The mass production of this product requires a lot of labor for the operator, and the product quality depends entirely on human control and labor-intensive. process, it is not suitable to use this process, the production efficiency is very low