CNC加工サイクルタイム短縮方法。加工パラメータの即座のCountersink Depth (mm), Drill Point Depth (mm)を取得。
悪い数値のコストは？典型的なジョブショップシナリオで計算してみましょう。もし 皿もみ深さ が15%攻撃的すぎる場合、 Gühring エンドミルを余分に買うだけでなく — 予期しないダウンタイム、手直し、納期遅れのコストを払っています。
| Premature Widia tool failures | $6,400/yr |
| Unplanned machine downtime | $12,200/yr |
| Rework / scrap parts | $8,700/yr |
| Excess Haimer holder wear | $2,100/yr |
| Total Annual Loss | $29,400/yr |
シナリオを逆にしてみましょう。 皿もみ深さ を最適化 — メーカー推奨の開始パラメータを特定の Gühring または Widia 工具に使用し、 Tesa プリセッターで検証 — することで年間約3万ドルを回収できます。これは新しい Makino 工具プローブまたは1年分の Gühring インサートに相当します。
ROIは即時。最初のパーツが最適化され、最初の節約日。
A countersink creates a conical recess for a flat-head fastener to sit flush with or below the surface. The depth depends on the head diameter of the screw and the countersink angle (typically 82 deg for inch fasteners, 90 deg for metric).
Historical convention. ANSI B18.6.3 specifies 82 deg for inch flat-head screws. ISO 7721 specifies 90 deg for metric. The difference is small enough that many shops use a 90 deg countersink for both -- it slightly undercuts the head but is functionally fine for most applications.
Use a countersink gauge (dial depth gauge with a conical tip) or a Deltronic pin method: place a known-diameter pin in the countersink and measure the height above the surface. Calculate depth from the pin diameter and protrusion. Alternatively, use the screw itself as a go/no-go gauge -- it should sit flush to 0.1 mm below the surface.
Yes, for small screw sizes (under M5 or #10) and light-duty applications. The 60 deg angle of a centre drill differs from standard countersink angles, so the screw head won't seat perfectly. For production, use the correct-angle dedicated countersink tool.
Enter the countersink diameter (screw head diameter) and the countersink angle. The calculator gives the depth to feed the countersink tool. Add 0.05-0.1 mm for flush seating; add 0.2-0.3 mm for below-flush (for filling or covering).
Continue with closely related tools from the machining calculator library.