Introduction of Kunshan Gaoli Seiko: How to choose the machining tool suitable for precision engraving machine?

Choosing a tool suitable for precision engraving machine to process die products, the core is to match the three dimensions of processing material characteristics, die processing technology and engraving accuracy requirements, and at the same time give consideration to tool durability and processing efficiency. The specific selection method is as follows:

Select tool materials according to machining materials.

Wood substrate (rubber board, density board): High speed steel (HSS) cutter or cemented carbide coated cutter is preferred. High-speed steel tool has good toughness, is not easy to break, and is suitable for complex paths such as slotting and hollowing. Carbide coated tools (such as TiN coating) have higher hardness and strong wear resistance, which is suitable for large-scale tool die processing and can reduce the frequency of tool change.

Metal substrate (aluminum plate, thin steel plate): carbide cutter or diamond coated cutter must be selected. Ordinary high-speed steel tools are easy to wear and cannot cope with metal cutting; The hardness of cemented carbide tools (such as tungsten steel) is above HRC90, which can efficiently process aluminum plates; Diamond coated tools are suitable for metals with slightly higher hardness, such as thin steel plates, and their service life is 3~5 times that of ordinary cemented carbide tools.

Composite plate (such as copper-clad plate cutter base material): select fine-tooth cemented carbide milling cutter to avoid delamination and burr during cutting.

Select the cutter type according to the machining process of the cutter die

Slot slotting: Choose double-edged spiral milling cutter or single-edged straight slot milling cutter. Double-edged spiral milling cutter has smooth chip removal, wood fiber is not easy to tear when cutting, and the processed groove wall is smooth, which is suitable for the groove processing of rubber plate die; Single-edge straight groove milling cutter has small cutting resistance, which is suitable for shallow groove machining of metal substrate and can reduce the risk of tool sticking.

Hollow-out/special-shaped contour machining: choose ball-end milling cutter or small-diameter flat-bottom milling cutter. Ball-end milling cutter is suitable for machining arc corners and special-shaped edges of cutter die to avoid edge collapse at sharp corners; Small-diameter flat-bottom milling cutter (φ0.5~φ3mm) can process fine hollowed-out patterns to meet the complex modeling requirements of gift boxes and high-end packaging knives.

Surface chamfering/chamfering: Choose chamfering cutter or conical milling cutter for chamfering the edge of the die to improve the feed smoothness during die cutting.

Selecting cutter parameters according to engraving accuracy and efficiency

Tool diameter: according to the cutter slot width, the cutter slot width = cutter diameter+0.01~0.02mm (reserved assembly allowance). For example, to process a 3mm wide tool bar slot, choose a milling cutter with a diameter of φ2.98~φ2.99mm; Small-diameter tools with φ0.5~φ2mm are selected for fine hollowing, and large-diameter tools with φ4~φ8mm are selected for large-size outer contour processing, so as to improve processing efficiency.

Tool length: follow the principle of "short and thick", give priority to short-handle tools, reduce vibration during cutting and improve machining accuracy. The extension length of the tool processed by the die should be 5~10mm longer than the processing depth to avoid the collision between the handle and the workpiece.

Number of cutting edges: multi-edge tools (3~4 blades) are selected for wood substrate, which can remove chips quickly and have high surface finish; The metal substrate is made of a 2-edged cutter, which has a large chip-containing space, which can effectively discharge metal chips and prevent the cutter from sticking.

Other key selection points

Adapting the spindle speed of engraving machine: the spindle speed of high-speed steel cutter is 10000 ~ 18000 r/min; The adaptive speed of cemented carbide tool is 15000~24000r/min, and too high speed will easily lead to overheating and wear of the tool.

Preferential selection of special die cutters: There are special milling cutters for die machining in the market, and their cutting edge angle and helix angle are optimized, which can better meet the machining requirements of cutter grooves and reduce the later grinding process.

Testing tool durability: before batch processing, try cutting with the same batch of materials, observe the wear of the cutting edge of the tool and the surface smoothness of the workpiece, and choose the tool model with slow wear and stable processing quality.