In pipeline welding preparation, the choice of beveling tools directly affects the beveling accuracy, work efficiency, and operational safety. Unlike thermal cutting methods (such as flame cutting), cold cutting and milling processes can preserve the original metallurgical properties of the material and avoid the heat-affected zone, which is crucial for meeting industrial welding standards. This article will provide a detailed introduction to various beveling tools, from manual to automated.
一. Core Materials of Bevel Processing Tools
Before understanding specific tools, it is necessary to first understand the material of the tool itself, as this determines what materials it can process and its service life.
High-Speed Steel (HSS, with cobalt): Suitable for carbon steel and stainless steel. Cobalt-containing high-speed steel (such as M35, M42) can maintain hardness at temperatures up to 600°C, suitable for medium-batch production.
Carbide (Tungsten Steel/Widia): Made by sintering tungsten carbide powder with a cobalt binder, it has extremely high hardness and excellent heat resistance. It is particularly suitable for processing difficult-to-cut materials, such as stainless steel, duplex steel, and Inconel.
PVD Coating: Coating materials like TiCN on the tool surface can reduce friction and chip adhesion, extending the tool life by 3-4 times.
二. How to Choose the Right Beveling Tool?
When selecting a tool, it is recommended to follow the four-step decision-making method below:
1. Clarify the pipe parameters and beveling requirements:
Size: What are the inner diameter (ID) and outer diameter (OD) of the pipe?
Wall thickness: What is the wall thickness and material grade (such as carbon steel, stainless steel, duplex steel)?
Bevel type: Do you only need a single V bevel? Or do you need a compound bevel (J-type or double-angle)? Is facing and counterboring also required?
2. Determine the clamping method and working environment:
Can you access the inside of the pipe? If so, internal clamping is preferred for better rigidity.
Is the pipe already installed, lined, or not allowed to be scratched inside? You must choose external clamping or split-type.
Does the working environment require explosion protection? You may need to choose pneumatic instead of electric.
3. Select the drive type and cutting tool:
Pneumatic: Suitable for most field operations, with high safety.
Electric: Convenient, does not require an air compressor, suitable for workshops or places with easy power access.
Hydraulic: High and constant torque, suitable for heavy-duty, large-diameter processing.
Cutting tools: Choose HSS or carbide blades according to the material.
