CBN tool, cubic boron nitride tool, is an ultra-hard cutting tool used for processing high hardness materials. The following is a detailed introduction to CBN tools:
1. Composition and structure
CBN is an ultra-hard artificial material, its hardness is second only to diamond. It is composed of nitrogen and boron atoms, forming a cubic crystal structure that gives it extreme hardness and thermal stability. CBN cutting tools are usually made of CBN particles through high temperature and high pressure sintering technology, and then combined with a metal die.
2. Features
High hardness: The hardness of CBN is close to that of diamond, allowing it to effectively cut high hardness materials such as hardened steel, cast iron and superalloys.
Wear resistance: Due to its high hardness and stable crystal structure, CBN cutting tools have excellent wear resistance and long service life in processing high hardness materials.
Thermal stability: CBN cutting tools remain stable at high temperatures and are suitable for high-speed cutting and dry cutting.
Chemical Stability: CBN is chemically inert to iron group metals, preventing it from chemically reacting with the workpiece when processing iron-based materials.
3. Request
CBN cutting tools are widely used in processing situations that require high hardness and wear resistance, including:
Hardened Steel: In automobile manufacturing and mold processing, CBN tools are used to machine high hardness steel after quenching.
Cast iron: suitable for precision machining of gray cast iron, ductile iron and other materials.
Powder metallurgy materials: used for processing cemented carbide and powder metallurgy parts.
Superalloys: Used in the aerospace industry to process nickel and cobalt-based superalloys.
4. Type
CBN cutting tools are mainly divided into the following categories based on their uses and manufacturing processes:
CBN turning tool: used for turning the outer circle, inner hole and end face of high hardness materials.
CBN milling cutter: used for milling flat surfaces and grooves in hard materials.
CBN boring tool: used for precision boring processing.
5. Precautions for use
Optimization of cutting parameters: The appropriate cutting speed and feed rate should be selected according to the hardness and characteristics of the material being processed to avoid excessive cutting temperature and tool wear.
Cooling and lubrication: Although CBN tools are suitable for dry cutting, in some high-temperature machining, proper use of coolant can extend tool life.
Clamping system: ensures the clamping rigidity of the tool and workpiece, reduces vibration and improves processing stability and precision.
6. CBN Tools Application Industry
1. Automotive industry
Context of the application
In the automotive industry, especially when machining engine and transmission parts, hard materials such as hardened steel and cast iron must be processed.
Application case
Engine block processing: CBN tools are used to process the cylinder bore of the engine block, which improves the processing efficiency and surface quality.
Gear Machining: When hard turning transmission gears, CBN tools significantly extend tool life and reduce machining downtime.
2. Aerospace industry
Context of the application
High temperature alloys and titanium alloys are widely used in the aerospace industry. These materials are difficult to process and require high tool performance.
Application case
Turbine blade processing: CBN tools are used to process high-temperature alloy materials of turbine engine blades, which improves the cutting efficiency and precision of parts.
Structural parts processing: CBN tools perform well in processing titanium alloy structural parts, reducing the frequency of tool replacement and improving production efficiency.
3. Mold manufacturing industry
Context of the application
Mold manufacturing involves a large amount of processing of carbide and high hardness steel, requiring tools with high wear resistance and long service life.
Application case
Injection mold processing: CBN tools are used for hard turning and grinding of injection molds, which greatly improves the processing precision and surface finish.
Stamping mold processing: In precision stamping mold processing, the use of CBN tools extends the life of the mold and reduces maintenance costs.
4. Heavy industry
Context of the application
The machining industry needs to process various materials with high hardness and difficult to machine, such as hardened steel, powder metallurgy materials, etc.
Application case
Bearing processing: CBN tools are widely used in hard turning of bearing races, improving the processing efficiency and service life of bearings.
Powder metallurgy parts processing: CBN tools perform well in powder metallurgy parts processing, effectively reducing tool wear and improving production efficiency.
5. Energy industry
Context of the application
The energy industry involves the processing of a large number of high hardness and wear-resistant materials, such as parts for oil drilling equipment and wind power equipment.
Application case
Oil drilling equipment: CBN cutting tools are used to process wear-resistant parts of oil drilling equipment, which greatly improves the processing efficiency and durability of parts.
Wind power equipment: When processing gears and bearings of wind power equipment, the use of CBN tools improves the precision and life of the parts.
6. Medical device manufacturing
Context of the application
The manufacturing of medical devices requires high precision and surface quality, and the materials used, such as titanium alloys and stainless steel, place high demands on cutting tools.
Application case
Orthopedic Implant Processing: CBN tools are used to process titanium alloy and stainless steel orthopedic implants, improving surface finish and dimensional accuracy.
Dental instrument processing: In the precision processing of dental instruments, the use of CBN tools greatly improves production efficiency and product quality.
These cases demonstrate the wide application and benefits of CBN tools in various industries. Through reasonable selection and use of CBN tools, processing efficiency, part quality and tool life can be significantly improved, and production costs can be reduced.
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