Application of plasma surfacing technology in the field of construction machinery

       Construction machinery is a general term for all types of construction machinery used in engineering construction, which are widely used in construction, electric power, water conservancy, roads, mines, ports, municipalities, national defense and other engineering fields. Construction machinery has a large volume and a wide range. The use of plasma surfacing technology can greatly increase the service life, and can also realize the remanufacturing of parts, saving resources and exerting greater economic benefits.



1. Shield cutter

With the extension of the urban subway rail network and the increase in construction, the working area of the shield machine not only needs to pass through the common weak stratum, but also needs to pass through some hard rock sections. It is generally believed that the scraper is suitable for soil and some soft rocks, and the disc hob is suitable for hard rock. Among them, the single-edged hob needs to work in the rock with high strength (above 200 MPa). In order to extend the service life of the hob, plasma surfacing technology is usually used to surfacing high-strength cemented carbide materials on the surface of the hob ring, which can greatly improve the wear resistance and compression resistance of the parts, extend the time for tool replacement, and improve the working surface. The excavation efficiency.

2. Rotary excavator picks

Rotary excavators are widely used in industrial and civil construction due to their characteristics of no soil squeezing, low vibration, low noise, low pollution, high degree of automation, fast drilling speed, safety and environmental protection and high efficiency in the process of forming holes. The pressure of the pressurization system of the rotary excavator is transmitted through the drill pipe, so that the bucket picks cut into the rock and soil. Plasma arc surfacing of wear-resistant alloy materials at the tip end of the pick can effectively improve the overall strength of the pick, and it is a very effective surface strengthening process.

3. Plunger

The plunger is an important structural part of the plunger valve and has a wide range of applications in construction machinery. The cooperation of the plunger and the cylindrical sleeve is a general cooperation of power transmission, which drives the connecting rod to complete the movement. Plasma surfacing technology is used to surfacing a layer of wear-resistant alloy material on the surface of the plunger, which can effectively improve its wear resistance and is an important guarantee for the stable and long-lasting operation of construction machinery.