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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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.

 

Read More About remove weld seam

Read More About remove weld seam

関係機器

当社はチューブミル入口セクションに必要なすべての機器を提供します:

コイルカー

シングルヘッドおよびダブルヘッドアンコイラーと油圧式および空気圧式アンコイラー

ピーラーとロールアームの押さえ

平坦化機

自動および半自動せん断機と突合せ溶接機

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

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チューブミル仕上げセクション

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

選択できるスペアパーツ

当社のスペアパーツの適用範囲:

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

当社の証明書

Read More About what is a ferrite rod

当社のサービス

当社を選ぶ理由

最先端の技術、信頼できる品質、優れたサービス!

最適化されたデザイン、高品質の素材を選択! 

熱処理工程保証!

スパイラルベベルギア、ドラムギアカップリング、浸炭処理。

ギア歯の焼入れ。

駆動システムは安定性、効率性、装着性、低ノイズを実現。

高精度の耐摩耗性とローラーの長寿命。

すべての機械旋盤、キー溝は CNC によって位置決めおよびフライス加工されます。

ais machinery exhibition attend

当社のサービス

事前販売サービス

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 

 

アフターサービス

1.機械を迅速にお届けできるよう、機械を納品し、書類を時間通りにご提供します。

2. 準備条件が完了すると、当社の迅速かつ専門的なアフターサービスエンジニアチームがお客様の工場に出向き、機械を設置し、操作マニュアルをお渡しし、従業員が機械をうまく操作できるようになるまでトレーニングを行います。

3. 1 年間の保証と生涯にわたる技術サポートを提供します。

4. 十分な訓練を受けた経験豊富なスタッフが英語と中国語ですべてのお問い合わせにお答えします。

エンジニアの対応には5~24時間かかります。

6. お客様と当社とのビジネス関係はいかなる第三者に対しても秘密にされます。

品質管理

当社には、原材料の品質を保証し、機械がスムーズに稼働することを保証する単一の品質管理部門があります。

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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