Contact Information

The document provides detailed contact details for Pramet and Dormer Tools across multiple global regions including Europe, Americas, Asia, and Oceania. Each regional office listing includes telephone, fax, and email contacts for customer service and sales support, facilitating direct communication for technical assistance and ordering.

Introduction to Scarfing Tools

Scarfing, or weld seam trimming, is introduced as a critical cutting operation in welded steel tube production. The document emphasizes the significance of chip shape as a quality indicator, where clean, simple chip formation reflects reliable and high-quality cutting performance.

Product Categories

• Holders: Devices designed to secure cutting inserts for external scarfing operations.
• Inserts: Replaceable cutting inserts available in various sizes and grades tailored to different tube diameters and cutting radii.
• Cutting Rings: Specialized rings used in scarfing, characterized by specific diameters and working radii.
• Technical Part: Detailed technical specifications, dimensions, and drawings essential for correct tool selection and application.

Catalog Structure

The catalog is systematically organized into sections covering assortments of holders, inserts, and cutting rings, with references to product lines such as SNMX (sizes 15, 19, 25, 2512), SNMA 25, LDGN, and PSR. This structure supports efficient navigation and selection based on application needs.

Holders for External Scarfing

Comprehensive descriptions and specifications are provided for holders like types PXFNR/L and XLCDN. Information includes component details (shims, clamping levers, screws, rivets, mounting plugs, keys), precise dimensions in millimeters, weights, and spare parts references to aid maintenance and replacement.

Insert Specifications

Extensive tables list interchangeable cutting inserts by type and size, detailing dimensions (length, diameter, thickness), material grades, and compatible tube diameters. Stock availability is clearly indicated, distinguishing stocked items, first-choice recommendations, and non-stock assortments. Key insert series include:

• SNMX 15 and 19: Inserts with diameters 15.875 mm and 19.050 mm, available in multiple radius sizes for various tube diameters.
• SNMX 25 and 2512: Larger inserts with 25.400 mm diameter, detailed with radius options and tube compatibility.
• SNMA 25: Another 25.400 mm diameter series with specific radius sizes.
• LDGN: Inserts sized 60 mm length, 5 mm thickness, and 15 mm width, offered in various radius sizes.

Technical Details and Dimensions

The document includes precise technical drawings and dimensional data for holders and inserts, specifying critical parameters such as angles, lengths, widths, and radii necessary for proper tool selection and application in scarfing operations.

Stock and Spare Parts

Stock availability is clearly marked for each product, facilitating inventory management. Spare parts references for holders and inserts are provided to support maintenance, ensuring minimal downtime and sustained tool performance.

Overview of Scarfing of Corrosion-Resistant Steel

Scarfing is described as a specialized cutting process primarily used in manufacturing welded steel tubes and closed profiles. The process involves forming steel strips into circular shapes, welding them continuously without filler material via induction heating, and removing weld burrs externally or internally to ensure product quality. Subsequent steps include tube calibration, straightening, and cutting to length.

Applications and Materials

Welded steel tubes produced by this method are widely used in construction, water and gas distribution, furniture manufacturing, and automotive industries (notably exhaust pipes). Materials commonly processed include carbon steel (often surface-treated with zinc or aluminum), corrosion-resistant steel, and heat-resistant alloys.

Cutting Rings and Inserts

Cutting tools for scarfing are made from tough cemented carbide substrates with advanced coatings applied via Chemical Vapor Deposition (CVD) or Physical Vapor Deposition (PVD). These coatings provide exceptional thermal shock resistance, critical due to high heat loads and relatively low cutting speeds in scarfing. Key features include:

• Optimized cutting geometry for high-quality surface finishes.
• Durable substrate and coating combinations enhancing tool life and productivity.
• Designs that reduce tool change frequency, lowering operational costs.
• Availability in various dimensions and grades to match tube diameters and scarfing radii.

Technical Specifications of Cutting Rings

Cutting rings are classified by type, external diameter (6 mm to 55 mm), working radius, and material grade. The working radius is calculated based on internal diameter and ring rotation angle. The assortment includes both stocked and non-stocked items, with detailed dimensions and availability listed in the price list.

Grades and Coatings for Scarfing Tools

Process and Quality Considerations

The scarfing process requires tools capable of withstanding high thermal stresses while delivering consistent, high-quality surface finishes. The combination of advanced carbide substrates, specialized coatings, and optimized cutting edge geometry ensures reliable operation, reduces tool wear, and minimizes downtime.

Additional Components

• Finishing and roughing holders
• Cutting inserts
• Leading wheels for tube shaping
• Internal holders for internal scarfing

Contact and Support

Extensive contact information for Dormer Pramet offices worldwide is included, providing customers with access to technical advice and product supply across various regions.

Summary

This technical document serves as a comprehensive reference for scarfing tools and processes used in corrosion-resistant steel tube production. It highlights critical aspects such as tool materials, coatings, dimensions, and applications, emphasizing the importance of tool durability, cutting geometry, and coating technology to achieve high-quality tube surfaces and efficient manufacturing.