How to Choose the Suitable Tools for Metal Processing(一)

Below are some characteristics of common workpieces for reference.We give some suggestion to choose the suitable tools according to the properties.We hope suitable tools could help you to get high work efficiency and longer service life.

A1 Copper, copper alloy

●Easy to process
●Some copper alloys have certain hardness but low ductility
●Improve the rigidity of the machine tool and the heat dissipation system, and it is recommended to use water-soluble lubricating fluid
●Using tools with excellent sharpness, high-precision machining, it is recommended to cool down before finishing
A2 Aluminum, aluminum alloy (5 series or less)
●Low hardness but high viscosity
●Plastic deformation becomes large during processing
●Reasonable selection of cutting thickness and speed, using a small feed rate and entering angle, and using high-efficiency cutting fluid
●Use tools with high sharpness and large rake angle to reduce cutting deformation
A3 aluminum alloy (6 series 7 series), hard aluminum alloy castings
●The hardness is relatively high and the plasticity is low
●Not suitable for pressure processing, use tools with excellent wear resistance, sharp blades, anti-sticking, and smooth chip removal
A4 magnesium alloy
●Excellent processing performance, low tool wear
●Good thermal conductivity, but low ignition point
●Dry processing is possible, avoid using water-soluble coolant to avoid flammable phenomenon of knife hitting and small chips
●The tool parameters are between steel and aluminum, and better surface roughness can be obtained by using a tool with good sharpness
A5 Thermosetting plastic (epoxy resin, etc.)
●Have a certain degree of rigidity, poor thermal conductivity, fast tool wear and brittle fracture
●Use sharp and wear-resistant materials to control the cutting speed to prevent accumulated heat from accelerating tool wear and workpiece coking
A6 Thermoplastic (nylon, etc.)
●Large thermal expansion coefficient, low heat resistance and rigidity
●Choose a small cutting speed to avoid softening and sticking of the tool to affect the surface quality, and pay attention to the chips entangled the workpiece and the tool
B1 zinc alloy castings
●Uneven stress on local under-materials, strong toughness and poor heat dissipation
● Air gun cooling is mostly used, and the tool holder with better rigidity is used for clamping
●Using high helix angle R grooves and anti-vibration design, easy chip breaking and wear-resistant tools with good chip removal, avoiding work hardening
B2 Cast iron, cast steel (gray cast iron, nodular cast iron)
●Gray cast iron has low impact strength, is easier to cut, and has no chemical wear
●Nodular cast iron has poor thermal conductivity and relatively high toughness
●Improve the rigidity of tools and machinery
●Use stable and cost-effective coated tools
B3 Ordinary structural steel, ordinary carbon steel
●Good thermal processing and cutting performance
●The strength of carbon steel is average, and the hardness of low-alloy structural steel is slightly higher than that of carbon steel.
●Select appropriate cutting parameters according to different carbon steel materials and tools to avoid buildup and improve processing efficiency
B4 alloy steel, tool steel (~HRC30)
●High-strength alloy steel has good plasticity and toughness, work hardening and hot
The characteristic of high strength increases the cutting resistance, and the cutting is easy to accumulate heat and tumors
●Choose a tool with sufficient strength and choose a suitable front and rear angle of the tool
●Choose the appropriate cutting volume according to the actual working conditions of roughing and finishing