Manufacturing process of corrosion-resistant piston rod of shock absorber for vehicle

Abstract

The invention discloses a manufacturing process of a corrosion-resistant piston rod of a shock absorber for a vehicle, comprising the following steps of: (1) blanking; (2) straightening for the first time; (3) grinding for the first time; (4) quenching; (5) tempering; (6) straightening for the second time; (7) grinding for the second time; (8) finely turning; (9) punching a mounting hole; (10) finely grinding; (11) polishing a resin grinding wheel; (12) supergrinding; (13) checking poriness; (14) automatically plating an upper suspension of a chrome wire workpiece; (15) electrolytic degreasing before the plating: carrying out the electrolytic degreasing on the workpiece as an anode in a lye tank; (16) etching the anode; (17) microcrack hard chrome plating: enabling a plating solution to flow from bottom to top in a plating tank till the plating solution overflows out of the plating tank; (18) cleaning; (19) automatically plating a lower suspension of the chrome wire workpiece; (20) removing hydrogen; and (21) supergrinding after the plating. The invention can effectively enhance the corrosion resistance of the piston rod, ensure the finished product ratio and prevent from generating hydrogen embrittlement, thereby enhancing the safety of the piston rod.

Description

technical field [0001] The invention relates to a manufacturing process for a piston rod of an automobile shock absorber. Background technique [0002] With the development of the automobile industry, higher requirements are put forward for the corrosion resistance of automobile piston rods, so as to adapt to a wide range of climate environments, especially marine environments, and to meet the various performances of automobiles without corrosion of piston rods, resulting in shock absorbers The oil seal is damaged, the oil leakage of the shock absorber fails, the vibration of the car increases, the stability and comfort of the car are affected, and in severe cases, the car is damaged, and even casualties are caused; [0003] At present, in order to improve the corrosion resistance of the piston rod of the shock absorber, its manufacturing process includes the following steps: 1) blanking: select 45# carbon steel; 2) straightening: straightness ≤ 0.1mm; 3) grinding ;4) Qu...