Thermal deburring by BENSELER

Thermal deburring - also known as explosion deburring - is used at BENSELER to deburr parts with hard-to-reach edges as set or bulk material quickly, economically and reliably. This technology is primarily used for parts whose deburring quality significantly influences the function of the end products. This method uses an oxygen-fuel gas mixture in the deburring chamber to burn off all burrs on the workpiece. The combustion process only takes a few milliseconds and takes place without removing any material from the component surface. The parts are only heated minimally: depending on the geometry and material, they are heated to between 80 and 160 degrees, while higher temperatures are also possible in the edge area.

The oxide layers that are deposited on the surface of the components during burning are then removed using special cleaning processes at BENSELER. The parts then appear almost metallically bright. A gray haze usually remains on steel and cast iron materials. If a surface coating or heat treatment is then applied, there may be no need for post-treatment. Thermal deburring therefore offers a very good basis for achieving industrial requirements in terms of technical cleanliness. The quality of thermal deburring depends on the size of the burr and the material: part-specific devices can be used to prevent impact marks and protect vulnerable areas on the component.

The biggest advantage of thermal deburring is high process reliability and absolute removal of burrs: In thermal deburring, absolute removal of all burrs means the removal of all loose burrs or flitter burrs on the component, so that no burr comes loose in most applications under "hydraulic-pneumatic conditions". The process is particularly suitable for the requirements of complex components. All deburring points on the workpiece (loose burrs or flitter burrs) are deburred and the burr roots are sealed.

• Stabilizes and seals the burr edges
• Suitable for steel, cast iron, stainless steels, aluminum, zinc die-casting Process-safe deburring on the entire component
• absolutely burr-free under "hydraulic-pneumatic conditions" (e.g. Loose burrs/flitter burrs and Sealing of burr root)
• Deburring in inaccessible areas such as bore intersections

Thermal deburring is mainly used in the automotive industry and for hydraulic and pneumatic applications. Among other things, valve housings, housings for injection pumps or oil pumps, control blocks, hubs and gear wheels are deburred here.

Subsequently, the combustion residues on the surface of the components are removed using special cleaning processes. The post-treatment is carried out on an aqueous basis with subsequent preservation and thus provides a very good basis for technical cleanliness with regard to metallic particles.

In addition to thermal deburring, BENSELER offers the following customer services:

• Electrochemical machining (ECM + PECM)
• High-pressure water jet deburring (HDW)
• Chemical deburring (CBE)
• Cryogenic deburring (KRE)
• Selective Laser Melting includig finishing (SLM)
• Industrial parts cleaning