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鋼絲螺套底孔尺寸選擇
[ 時間:2014-10-26 點擊:7505 ]
鋼絲螺套安裝過程中,鋼絲螺套底孔尺寸加工要考慮到孔徑與孔深等問題。攻螺紋前的底孔直徑應能使攻螺紋后的螺紋內徑符合安裝鋼絲螺套用的螺紋內徑的規定。
安裝鋼絲螺套前鋼絲螺套底孔的加工
鋼絲螺套底孔孔徑的選擇
攻螺紋前的螺紋護套底孔直徑應能使攻螺紋后的螺紋內徑符合安裝鋼絲螺套用的螺紋內徑的規定(HB5515-96 或 GJB119.3-86)
選擇螺紋護套底孔鉆頭直徑時應考慮不同材料鉆孔及攻絲時可能產生產差異。
在沒有標準資料的情況下也可參照下列公試計算選擇鉆頭直徑
用表中所列標準鉆頭鉆孔,鉆孔深度大于或等于L2;注意不要將孔鉆成錐形,不宜選用磨損嚴重的鉆頭,切屑不要掉入可能會引起損壞的地方賀德克濾芯。鉆孔后允許去毛刺性質的锪孔,锪孔不應超過0.4P深度,因為過大的锪孔不利于鋼絲螺套的旋入和引起不適應的裝配。When drilling with the standard drill bitslisted in the table, the drilling depth is more than or equal to L2. Don’tdrill holes into tapered shape or choose seriously wearing drill or make scrapsfall into the place may cause the damage. Spot-facing with deburring functioncan be used after drilling hole, and its depth shouldn’t more than 0.4P,because oversized spot-facing isn’t suitable for wire thread inserts to screwin or may cause improper assembly.
螺紋規格 | 鉆頭直徑( mm) | 螺紋規格 | 鉆頭直徑( mm) |
M2x0.4 | 2.1 | M8x1 | 8.3 |
M2.5x0.45 | 2.6 | M10x1 | 10.3 |
M3x0.5 | 3.1 | M10x1.25 | 10.3 |
M4x0.7 | 4.2 | M12x1.25 | 12.3 |
M5x0.8 | 5.2 | M12x1.5 | 12.4 |
M6x1 | 6.3 | M12x1 | 12.3 |
M7x1 | 7.3 | M13x1.25 | 13.3 |
M8x1.25 | 8.3 | M14x1.5 | 14.4 |
M10x1.5 | 10.4 | M14x1.25 | 14.3 |
M11x1.5 | 11.4 | M16x1.5 | 16.4 |
M12x1.75 | 12.4 | M18x1.5 | 18.4 |
M14x2 | 14.5 | M20x1.5 | 20.4 |
M16x2 | 16.5 | M20x2 | 20.5 |
M18x2.5 | 18.6 | M22x2 | 22.5 |
M20x2.5 | 20.6 | M22x1.5 | 22.4 |