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- Classification and application of shield cutting tools
- Tool shape and its functionThe shape of the cutting tool must adapt to the characteristics of construction geology, and its functions and requirements are different at different positions of the cutting section. Therefore, the cutting tool should be designed.① The cutting efficiency of cutting tool···
- What are the advantages of using pipe jacking technology?
- The excavation engineering technology completely solves the problems such as the damage to urban buildings and the congestion of road traffic in the pipeline laying construction, and highlights its advantages in stabilizing soil layer and environmental protection. This is very important for cities w···
- Analysis of pick loss and its influencing factors
- Pick is a cutter installed on the working mechanism of shearer and roadheader for direct cutting of coal and rock. In the process of coal production, a large amount of pick consumption not only increases the cost per ton of coal and affects the economic benefits of coal production, but also reduces ···
- Study on wear life of high speed cutting tools
- Since the 1980s, due to the breakthrough in the design and manufacturing technology of functional components such as spindle and feed system of NC machine tool, the spindle speed and feed speed of NC machine tool have been greatly improved. Driven by the comprehensive progress of modern manufacturin···
- Cause analysis of cracks in welding tools
- 1. Mechanism and type of crack formation of welding knife1) Effect of heating on crack formation of cemented carbideThe thermal expansion coefficient of cemented carbide blade is quite different from that of steel (tool bar), and the thermal conductivity of the alloy is also worse than that of the t···
- Main wear forms of shearer pick and application of surfacing technology
- When cutting coal and rock, the shearer pick will bear high intermittent impact load, and the hard micro bumps on the surface of the shearer pick will deform. Repeated extrusion will lead to plastic flow on the nearby soft surface and accumulation in the sub surface layer of the shearer pick.At the ···