Carbide cutting tools
Tool processing is the most basic processing method in the machinery manufacturing industry. The processed parts have high requirements for dimensional accuracy and surface quality. Cutting refers to the use of carbide tools to remove excess material from machined parts. The use of carbide tools for cutting occupies an important position in the machining process.
Cutting tools are tools used for cutting in machine manufacturing. The vast majority of knives are machine-used, but there are also hand-used ones. Since the tools used in mechanical manufacturing are basically used to cut metal materials, the term "tool" is generally understood as a metal cutting tool. The knives used for cutting wood are called woodworking knives.
Type of cutting tools
There are many types of carbide cutting tools, and there are different classification methods.
■ Processing various external surface tools, including turning tools, planers, milling cutters, external surface broaches and files, etc.;
■ Hole processing tools, including drills, reaming drills, boring cutters, reamers and inner surface broaches, etc.;
■ Thread processing tools, including taps, dies, automatic opening and closing thread cutting heads, thread turning tools and thread milling cutters, etc.;
■ Gear processing tools, including hobs, gear shaping cutters, gear shaving cutters, bevel gear processing tools, etc.;
■ Cutting tools, including toothed circular saw blades, band saws, bow saws, cut-off turning tools, saw blade milling cutters, etc.
In addition, there are combined tools.
According to the cutting motion mode and the corresponding blade shape, cutting tools can be divided into three categories:
■ General tools, such as turning tools, planers, milling cutters (not including shaped turning tools, shaped planers and shaped milling cutters), boring cutters, drills, reamers, reamers and saws, etc.;
■ Forming tools, the cutting edge of this type of tool has the same or close to the same shape as the section of the workpiece to be processed, such as forming turning tools, forming planers, forming milling cutters, broaches, conical reamers and various thread processing tools, etc.;
■ Generating tools are used to process gear tooth surfaces or similar workpieces by the generative method, such as hobs, gear shapers, gear shaving cutters, bevel gear planers and bevel gear milling cutters, etc.
Cutting tools condition
Carbide cutting elements are represented by turning tools.The basic definition of the cutting part of carbide cutting tools and related terms are introduced.the analysis of carbide cutting geometry and the method of illustration are explained.
The material used to make the tool must have high high temperature hardness and wear resistance, necessary bending strength, impact toughness and chemical inertness, good manufacturability (cutting, forging, heat treatment, etc.), and not easy to deform.
Cutting tools process
Carbide cutting process refers to the process in which the carbide cutting tool cuts the excess metal layer from the workpiece through the cutting motion to form chips and the machined surface.
In this process, carbide cutting tool deforms and forms chips , Produce cutting force, cutting heat and temperature, cutting tool wear and many other phenomena.
Cutting tools application and features
Cutting tools are widely used in industrial production processes. Now that the level of the machining industry is improving day by day, the industry has put forward new requirements for cutting tools. In addition to the improvement of process technology, green and sustainable production has become a new trend
The diversity of cutting tools and the characteristics of the working conditions during use determine the difference in the choice of tool coatings. Turning and drilling are different, and the characteristics of intermittent impact should be considered for milling cutters.
In the metal cutting process, the carbide cutting tool part directly completes the cutting work. Its performance directly affects the quality of cutting tools and processing. The high end of cutting productivity and tool durability, the quality of parts processing accuracy and surface quality, etc., to a large extent depend on whether the choice of cemented carbide cutting tool materials is reasonable.
In the metal cutting process, cemented carbide cutting tools not only withstand large cutting forces and high temperatures, but also withstand impact loads and mechanical friction. Therefore, cemented carbide cutting tool materials must have high hardness, high wear resistance, sufficient strength and toughness, and good high temperature heat resistance, chemical stability and thermal conductivity.
Because carbide has better heat resistance and wear resistance than high-speed steel, cutting tools made of carbide materials are more suitable for cutting stainless steel.
