Inner Burr Removal Knife for ERW Tube Mills
During high-frequency welding of steel tubes, excess weld material often forms along the inner seam, creating internal burrs that can interfere with downstream processes or product quality. The inner burr removal knife is a critical tool designed to trim and smooth these internal weld protrusions in-line during tube production, especially for applications requiring high inner surface quality—such as in automotive tubing, furniture, and fluid transport systems.
Working Principle
The inner burr knife is typically installed after the welding section and before sizing. A precision-guided support mechanism feeds the knife head into the inner diameter of the tube, aligning it directly under the weld seam. As the tube continuously moves forward, the knife scrapes or shaves off the burr along the weld line. Some knife heads feature oscillating or rotary action to enhance trimming efficiency. Removed burr particles are discharged and collected via an external extraction system.


Key Specifications (customizable upon request)
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Applicable Tube Diameter: Φ16 – Φ219 mm (larger sizes available)
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Wall Thickness Range: 1.0 mm – 8.0 mm
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Knife Material Options: Carbide steel, HSS (High-Speed Steel), Ceramic-coated
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Offset Adjustment Range: ±3 mm (to align with weld seam position)
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Knife Mounting System: Mechanical locking / Spring preload / Pneumatic-assisted
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Cooling Options: Air-cooled / Water-cooled / Dry-cutting (depending on application)
Common Questions & Answers
Q1: Is burr removal always necessary?
Not always. For light-wall or general-purpose tubing, internal deburring may not be required. However, it's recommended for structural or high-spec applications.
Q2: How long does the knife last?
The knife is a consumable. HSS or carbide blades typically last 1–3 weeks depending on speed, material, and maintenance. Keep spare sets available for continuous operation.
Q3: Does the knife require precise weld alignment?
Yes. Poorly aligned or inconsistent welds can cause blade deflection or breakage. Weld quality should be stable before applying internal burr removal.
Q4: Is the knife easy to replace?
Yes. Most knife holders are designed for quick change, with replacement typically taking just a few minutes.
Usage Tips
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Always align the knife precisely with the weld seam before operation.
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For automated lines, use seam-tracking systems to optimize blade positioning.
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If scratching or tube wall damage occurs, inspect blade sharpness and angle settings.
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When changing tube diameters, use matching knife heads or inserts for best results.


EQUIPAMENTO DE RELACIONAMENTO
Nós fornecemos todos os equipamentos para a seção de entrada do moinho de tubos:
Carro de bobina
Desbobinador de cabeça simples e dupla e desbobinador hidráulico e pneumático
Descascador e braço de rolo de retenção
Máquina de achatamento
Cortador automático e semiautomático e soldador de topo
Vertical Cage Accumulator & Horizontal Loop Accumulator & Landing Horizontal Spiral Loop Accumulator

SEÇÃO DE ACABAMENTO DE MOINHO DE TUBOS
We provides all equipment to tube mill Finishing section:
1. Eddy current machine
2. Seam annealing machine
3. Straightener machine
4. Chamfer and end facer machine
5. Hydro Tester machine
6. Threading machine
7. Painting and oil machine
8. Automatic bundle and package machine

PEÇAS DE REPOSIÇÃO PARA ESCOLHER
Nossas peças de reposição se aplicam:
1. Roller, Mould, Cr12, Cr12Mov material, D2,D3 material
2. Ferrite, Impeder, Fiberglass tube
3. HSS saw blades, TCT Saw blades, Friction saw blades
4. OD burr remove inserts, ID burr remover inserts
5. HF welder Induction Coil and other HF welder spare parts
6. Copper tube for induction Coil, PTFE pipe for Induction Coil
7. Mosfet, Boards
8. Steel pipe Strapping machine
9. Zinc Spray Machine, Zinc wire, Zinc spray gun

NOSSO CERTIFICADO

NOSSO SERVIÇO
Por que nos escolher?
Tecnologia de ponta, qualidade confiável, serviço excelente!
Design otimizado, seleção de materiais de alta qualidade!
Garantia do processo de tratamento térmico!
Engrenagem cônica espiral, acoplamento de engrenagem de tambor e cementação.
Têmpera dos dentes da engrenagem.
Sistema acionado estável, eficiente e usável com menor ruído.
Alta precisão, resistência ao desgaste e longa vida útil dos rolos.
Todos os tornos e ranhuras de máquinas são posicionados e fresados por CNC.

Nosso serviço
Serviço de pré-venda
1. We can provide machine running videos for reference
2. We will recommend the most suitable equipment according to the needs of customers
3. We can provide the layout of the factory
4. We welcome customers to visit our factory
Serviço pós-venda
1. Nós entregaremos a máquina e forneceremos os documentos a tempo para garantir que você possa obtê-la rapidamente
2. Quando você terminar as condições de preparação, nossa equipe de engenheiros de serviço pós-venda rápida e profissional irá até sua fábrica para instalar a máquina, fornecer o manual de operação e treinar seus funcionários até que eles possam operar bem a máquina.
3. Oferecemos garantia de um ano e suporte técnico vitalício.
4. Uma equipe bem treinada e experiente responderá a todas as suas perguntas em inglês e chinês
5,24 horas para resposta do engenheiro.
6. Seu relacionamento comercial conosco será confidencial para terceiros.
Controle de qualidade
Temos um único departamento de qualidade que garante que a matéria-prima seja boa e que a máquina funcione sem problemas.
