Selecting the appropriate piercing tool and understanding its components are crucial for efficient and high-quality seamless steel pipe production. Proper use and maintenance of the roller, guide, and head ensure optimal deformation, accurate diameter control, and improved overall productivity. The piercing tool used for seamless steel pipes consists of the following components.
1. Roller
The roller is the primary drive deformation tool, typically composed of three parts: the inlet cone, rolling belt (also called compression belt), and outlet cone. Its functions include:
Inlet Cone: Guides the tube blank into the perforation process.
Rolling Belt: Acts as a transition between the inlet cone and the outlet cone.
Outlet Cone: Reduces the wall thickness, levels the surface of the capillary tube, ensures uniform wall thickness, and completes the capillary return process.
2. Guide
The guide is a fixed external deformation tool. It not only guides the tube blank and the capillary tube, ensuring a stable rolling line, but also plays a crucial role in controlling the diameter of the capillary tube by limiting its lateral deformation (expanding diameter). The guide plate has a shape similar to the roller, with three sections: inlet, transition, and outlet.
Inlet Section: Introduces the tube blank.
Transition Section: Facilitates the transition.
Outlet Section: Guides the capillary tube out and limits its expansion.
3. Head
The head is a critical deformation tool within the puncher, equivalent to the inner roll of a steel ring mill. It is fixed in the axial position of the deformation zone by the support of the top bar. The head is responsible for transforming the tube blank from solid to hollow, with its piercing cone expanding the inner diameter to the required size. It consists of four sections: the nose, the perforated cone, the flat belt, and the reverse taper belt.
Nose: Aligns with the blank centering hole during piercing, making it easier to work on and applying axial force to the center of the tube to prevent the preformed cavity.
Perforated Cone: Handles the perforation of the tube and reduces the capillary tube's wall thickness.
Flat Belt: With a cone angle equal to the taper angle at the roll exit, it ensures the entire wall thickness of the capillary tube and flattens it.
Reverse Taper Belt: Prevents internal scratches when the capillaries detach from the head.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
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