Tube inside Scarfing Inserts

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.

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Specification
 
 

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.

Read More About remove weld seam 

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Read More About remove weld seam

Key Specifications (customizable upon request)

  • Applicable Tube Diameter: Φ16 – Φ219 mm (larger sizes available)

  • Wall Thickness Range: 1.0 mm – 8.0 mm

  • Knife Material Options: Carbide steel, HSS (High-Speed Steel), Ceramic-coated

  • Offset Adjustment Range: ±3 mm (to align with weld seam position)

  • Knife Mounting System: Mechanical locking / Spring preload / Pneumatic-assisted

  • 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

  • Always align the knife precisely with the weld seam before operation.

  • For automated lines, use seam-tracking systems to optimize blade positioning.

  • If scratching or tube wall damage occurs, inspect blade sharpness and angle settings.

  • When changing tube diameters, use matching knife heads or inserts for best results.

 

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Read More About remove weld seam

EQUIPEMENT DE RELATION

Nous fournissons tout l'équipement pour la section d'entrée du laminoir à tubes :

Voiture à bobine

Dérouleur à tête simple et double et dérouleur hydraulique et pneumatique

Bras d'éplucheur et de maintien du rouleau

Machine à aplatir

Cisailleuse et soudeuse bout à bout automatique et semi-automatique

Vertical Cage Accumulator​ & Horizontal Loop Accumulator & Landing Horizontal Spiral Loop Accumulator

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SECTION DE FINITION DU LAMINEUR À TUBES

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

tube mill finishing section machine

PIÈCES DE RECHANGE AU CHOIX

Nos pièces de rechange s'appliquent :

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

ferrite impeder hss tct saw blade

NOTRE CERTIFICAT

Read More About what is a ferrite rod

NOTRE SERVICE

Pourquoi nous choisir?

Technologie de pointe, qualité fiable, excellent service !

Conception optimisée, sélection de matériaux de haute qualité ! 

Garantie du processus de traitement thermique !

Engrenage conique hélicoïdal, accouplement à tambour et cémentation.

Trempe des dents d'engrenages.

Système d'entraînement stable, efficace et portable avec moins de bruit.

Haute précision, résistance à l'usure et longue durée de vie des rouleaux.

Tous les tours mécaniques, les rainures de clavette sont positionnés et fraisés par CNC.

ais machinery exhibition attend

Notre service

Service avant-vente

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 

 

Service après-vente

1. Nous livrerons la machine et fournirons les documents à temps pour nous assurer que vous pouvez obtenir la machine rapidement

2. Lorsque vous avez terminé les conditions de préparation, notre équipe d'ingénieurs du service après-vente rapide et professionnel se rendra dans votre usine pour installer la machine, vous remettre le manuel d'utilisation et former votre employé jusqu'à ce qu'il puisse bien utiliser la machine.

3. Nous offrons une garantie d'un an et un support technique à vie.

4. Un personnel bien formé et expérimenté répondra à toutes vos demandes en anglais et en chinois

5,24 heures pour l'intervention de l'ingénieur.

6. Votre relation commerciale avec nous sera confidentielle envers tout tiers.

Contrôle de qualité

Nous disposons d'un département de qualité unique, qui garantit que le matériau des matières premières est bon et garantit le bon fonctionnement de la machine.

ais machinery after service and quality control

 

 

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What are Tube Inside Scarfing Inserts used for?

It is used to scrape the inner wall weld of steel pipe and remove the internal burrs.

What is the difference between yellow and black Tube inside Scarfing Inserts?

They have different coatings, yellow is titanium plating, and black is black crystal steel.

What models are available for Tube inside Scarfing Inserts?

It has many models, which can be selected according to the size of the steel pipe.

Why do you need Tube inside Scarfing Inserts?

The application of Tube inside Scarfing Inserts can make the steel pipe look smoother and more beautiful, meet national standards, and extend the service life of the steel pipe.

What is the quality of Tube inside Scarfing Inserts?

Our Tube inside Scarfing Inserts are alloy steel ring knives with good quality, but attention should be paid to the correct use method to ensure its service life.

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