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鋼絲螺套底孔尺寸選擇
[ 時(shí)間:2014-10-26 點(diǎn)擊:7495 ]
鋼絲螺套安裝過(guò)程中,鋼絲螺套底孔尺寸加工要考慮到孔徑與孔深等問(wèn)題。攻螺紋前的底孔直徑應(yīng)能使攻螺紋后的螺紋內(nèi)徑符合安裝鋼絲螺套用的螺紋內(nèi)徑的規(guī)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(hù)套底孔直徑應(yīng)能使攻螺紋后的螺紋內(nèi)徑符合安裝鋼絲螺套用的螺紋內(nèi)徑的規(guī)定(HB5515-96 或 GJB119.3-86)
選擇螺紋護(hù)套底孔鉆頭直徑時(shí)應(yīng)考慮不同材料鉆孔及攻絲時(shí)可能產(chǎn)生產(chǎn)差異。
在沒(méi)有標(biāo)準(zhǔn)資料的情況下也可參照下列公試計(jì)算選擇鉆頭直徑
用表中所列標(biāo)準(zhǔn)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(yán)重的鉆頭,切屑不要掉入可能會(huì)引起損壞的地方賀德克濾芯。鉆孔后允許去毛刺性質(zhì)的锪孔,锪孔不應(yīng)超過(guò)0.4P深度,因?yàn)檫^(guò)大的锪孔不利于鋼絲螺套的旋入和引起不適應(yīng)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(guī)格 | 鉆頭直徑( mm) | 螺紋規(guī)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 |