Before choosing a solid carbide drill bit to process parts, you must first select the carbide type (P, M, K, S, N, etc.) according to the material of the part; secondly, according to the size and depth of the drilling hole , choose different drill bit sizes and structures, such as two-edged, three-edged, etc.; finally, select different cutting parameters according to the equipment and product accuracy.
(This article is selected from Chapter 5, Section 1 (6) Solid Carbide Drill Bits of " CNC Tool Selection Guide ")
7. Carbide three-edged TRS drill bit (Ouch machine)
(1) Product introduction. Compared with ordinary two-edged drill bits, the TRS carbide inner-cooled oil hole three-edged drill bit (see Figure 5-36) has a larger chip flute, which can break well when processing cast iron and cast aluminum materials. Cutting chips and maintain good and smooth chip evacuation. The three-edge TRS drill bit can achieve high feed, and the limit feed speed exceeds vf=5000mm/min, which can ensure superior hole accuracy while processing at high speed. WDⅠ coating can exert great power in the field of high-speed drilling.
Figure 5-36 Carbide 3-edge TRS drill bit
(2) Product features
) 120° equally divided land, reducing the generation of vibration during cutting and inhibiting the generation of burrs in the hole.
) The unique groove shape can segment the chips into fine pieces even under high feed processing conditions.
3) Suppress the occurrence of work hardening and improve the life of subsequent tools.
4) Adopt the most appropriate negative edge angle design to inhibit the occurrence of edge chipping.
(3) Application cases
) Tools used: TRS-HO-5D.
) Tool size: φ=8mm.
3) Processing material: FCD600.
4) Cutting parameters: vc=100m/min, hole depth L=40mm (through hole).
5) cutting fluid : water-soluble cutting fluid (external oil supply).
6) Machinery used: horizontal machining center.
7) Result: The number of holes processed by other companies' products is 500 holes, while the number of holes processed by the Oscillator carbide three-edged TRS drill bit is 2000 holes (see Table 5-11).
Table 5-11 Comparison of cutting conditions of products of different companies
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8. Enhanced series DC150 (Walter-Titex)
(1) Product introduction. The solid carbide drill bit (see Figure 5-37) has strong versatility and wear resistance. It is suitable for ISO workpiece material groups P, M, K, N, S, H, and O. The tool has external cooling or internal cooling and the drill shank There are various types of parts, suitable for all common tool holders in drilling processing, such as inclined side fixed tool holders, hydraulic tool holders, spring tool holders, thermal expansion tool holders and powerful tool holders. The tool economy is especially good when processing small and medium batches. protrude.
Figure 5-37 DC150
(2) Application examples
) Processed parts: connectors.
) Workpiece material: EN-GJS-600-3/0.7060/GGG60.
3) Machine tools used: vertical machining center , external cooling.
4) Tool: DC150-03-10.00A0-WJ30RE.
5) Hole depth: L=25mm.
6) Cutting parameters: vc=60m/min, n=1900r/min, f=0.2mm/r, vf=380mm/min.
7) Processing effect: 4960 holes, lifespan 124m.
9. C1/CX1, C2/CX2 composite drill bit (Seco)
(1) Product introduction. Seco's C1/CX1 and C2/CX2 series drill bits (see Figure 5-38) are specially designed for processing carbon fiber , glass fiber and aramid fiber composite materials.
Figure 5-38 C1/CX1, C2/CX2 composite drill bits
C1 series are carbide drill bits with Dura diamond coating, which have good wear resistance. The CX1 series is made of carbide welded PCD drill tips with the highest wear resistance. The drill tip designs of the two are similar, and the cutting edge is made of double angles. The C1 groove is used to process the entire composite material, and can also be used to process parts made of composite materials for export. It can effectively improve the problems of easy delamination and burring at the hole exit of composite materials.
C2 and CX2 series are Dura diamond coated carbide and welded PCD drill bits respectively. The tip designs of the two drills are similar. C2 geometry is suitable for processing laminated materials. That is, the composite material and the aluminum/titanium alloy are bonded together, and the outlet is a metal material. This groove shape improves chip breaking performance, facilitates chip breaking of aluminum alloys and titanium alloys, and ensures the surface quality of composite materials.
(2) Application examples
) Processing workpiece: wing parts.
) Workpiece material: carbon fiber composite material .
3) Hole diameter: φ6.36mm.
4) Hole depth: L=5~18mm.
5) Drill bit: standard CX1 drill bit, diameter φ6.36mm.
6) Processing parameters: vc=220m/min, f=0.08mm/r.
7) Summary: The aperture tolerance is guaranteed to be 6.35~6.375mm, without delamination and uncut fibers.
