High-strength nitrogen spring production technology and method

Abstract

The invention discloses a high-strength nitrogen spring production technology and method which comprises the following operating steps: S1, forging: preheating at 380-400 DEG C, then, raising the temperature to 850-880 DEG C at the speed of 5-8 DEG C / min, carrying out thermal insulation for 20-30 minutes, then, raising the temperature to 1150-1200 DEG C at the speed of 3-5 DEG C / min, and carryingout thermal insulation for 1 to 2 hours; S2, die casting: adopting a press to carry out die casting on a heated cylinder block green body to enable the radial die casting deformation quantity of the cylinder block green body to be 20-25%; S3, cutting and polishing: cutting and polishing the cylinder block green body to obtain a round steel body for standby application; S4, lathing; S5, assemblingand S6, quality inspection. According to the high-strength nitrogen spring production technology and method, high temperature and high pressure forging treatment is carried out on the cylinder block green body, the cylinder block green body is prevented from the peroxidation phenomenon under the nitrogen protection, uniform martensite and austenite crystal can be formed in the cylinder block structure, the structural strength of the cylinder body green body can be effectively improved, the high pressure resistance of the cylinder block is improved to prevent the cylinder block from bursting, and the support strength of the nitrogen spring is improved.

Description

technical field [0001] The invention belongs to the technical field of nitrogen gas springs, and in particular relates to a production process and method of high-strength nitrogen gas springs. Background technique [0002] Nitrogen gas spring is a part that can realize functions such as support, buffer, brake, height and angle adjustment. In construction machinery, it is mainly used in covers, doors and other parts. The gas spring is mainly composed of a piston rod, a piston, a sealing guide sleeve, a filler, a pressure cylinder and a joint. The pressure cylinder is a closed cavity filled with an inert gas or an oil-gas mixture. times or dozens of times. Since the inside of the cylinder needs to maintain a high pressure, it will also form a reaction force on the cylinder. At present, the cylinder body of the nitrogen gas spring is usually directly processed by stainless steel. With the reduction of the thickness of the cylinder body or the increase of the internal pressure...

AI Technical Summary

Problems solved by technology

At present, the cylinder body of the nitrogen gas spring is usually directly processed by stainless steel. With the reduction of the thickness of the cylinder body or the increase of the internal pressure of the cylinder body, the long-term high pressure of the cylinder body will cause invisible deformation to the cylinder body. Thus affecting the airtightness of the cylinder and reducing the service life of the nitrogen spring