Wednesday, October 24, 2007

怎样对不锈钢进行铰孔?www.tool-tool.com

Bewise Inc. www.tool-tool.com Reference source from the internet.

对不锈钢铰孔时,经常遇到的问题是:孔表面容易划出沟槽,粗糙度差,孔径超差,呈喇叭口,铰刀易磨损等。不同种类不锈钢的切削加工性不同,在铰孔中所表现 出的问题也不一样,如对1Cr18Ni9Ti等奥氏体不锈钢和耐浓硝酸不锈钢铰孔时,主要是铰刀磨损问题;而对2Cr13等马氏体不锈钢铰孔时,主要是不 容易保证铰孔的粗糙度和尺寸精度问题。为了避免这些问题,应注意以下事项:

1) 合理选择铰刀和铰削用量,是保证铰孔顺利进行的关键。

2)提高预加工工序质量,防止预加工孔出现划沟、椭圆、多边形、锥度或喇叭口、腰鼓形状、轴心线弯曲、偏斜等现象。

3) 保持工件材质硬度适中,尤其对2Cr13马氏体不锈钢,调质处理后的硬度在HRC28以下为宜。

4) 正确安装铰刀和工件,铰刀必须装正,铰刀轴线应和工件预加工孔的轴线保持一致,以保证各刀齿均匀切削。

5) 选用合适的切削液,可以解决不锈钢的切屑粘附问题,并使之顺利排屑,从而降低孔表面粗糙度和提高刀具耐用度。一般以使用硫化油为宜,若在硫化油中添加 10%~20%CCl4或在猪油中添加20%~30%CCl4,对降低表面粗糙度有显著的效果。由于CCl4对人体有害,宜采用硫化油85%~90%和煤 油10%~15%的混合液。铰刀直径较大时,可采用内冷却方式。

6) 认真注意铰孔的过程,严格检查刀齿的跳动量,是获得均匀铰削的关键。在铰削过程中,注意切屑的形状,由于铰削余量小,切屑呈箔卷状或呈很短的螺卷状。若切 屑大小不一,有的呈碎末状、有的呈小块状,说明铰削不均匀。若切屑呈条的弹簧状,说明铰削余量太大。若切屑呈针状、碎片状,说明铰刀已经磨钝。还要防止切 屑堵塞,应勤于观察刀齿有无粘屑,以避免孔径超差。使用硬质合金铰刀铰孔时,会出现孔收缩现象,为防止退刀时将孔拉毛,可采取加大主偏角来改善这种情况。

BW Bewise Inc. Willy Chen willy@tool-tool.com bw@tool-tool.com www.tool-tool.com skype:willy_chen_bw mobile:0937-618-190 Head &Administration Office No.13,Shiang Shang 2nd St., West Chiu Taichung,Taiwan 40356 TEL:+886 4 24710048 / FAX:+886 4 2471 4839 N.Branch 5F,No.460,Fu Shin North Rd.,Taipei,Taiwan S.Branch No.24,Sec.1,Chia Pu East Rd.,Taipao City,Chiayi Hsien,Taiwan

Welcome to BW tool world! We are an experienced tool maker specialized in cutting tools. We focus on what you need and endeavor to research the best cutter to satisfy users demand. Our customers involve wide range of industries, like mold & die, aerospace, electronic, machinery, etc. We are professional expert in cutting field. We would like to solve every problem from you. Please feel free to contact us, its our pleasure to serve for you. BW product including: cutting toolaerospace tool .HSS Cutting toolCarbide end millsCarbide cutting toolNAS Cutting toolCarbide end millAerospace cutting toolФрезерыCarbide drillHigh speed steelMilling cutterCVDD(Chemical Vapor Deposition Diamond )PCBN (Polycrystalline Cubic Boron Nitride) Core drillTapered end millsCVD Diamond Tools Inserts’PCD Edge-Beveling Cutter(Golden Finger’PCD V-Cutter’PCD Wood tools’PCD Cutting tools’PCD Circular Saw Blade’PVDD End Mills’diamond tool Single Crystal Diamond Metric end millsMiniature end millsСпециальные режущие инструменты Пустотелое сверло Pilot reamerFraisesFresas con mango PCD (Polycrystalline diamond) FreseElectronics cutterStep drillMetal cutting sawDouble margin drillGun barrelAngle milling cutterCarbide burrsCarbide tipped cutterChamfering toolIC card engraving cutterSide cutterNAS toolDIN toolSpecial toolMetal slitting sawsShell end millsSide and face milling cuttersSide chip clearance sawsLong end millsStub roughing end millsDovetail milling cuttersCarbide slot drillsCarbide torus cuttersAngel carbide end millsCarbide torus cuttersCarbide ball-nosed slot drillsMould cutterTool manufacturer.

Bewise Inc. www.tool-tool.com

BW специализируется в научных исследованиях и разработках, и снабжаем самым высокотехнологичным карбидовым материалом для поставки режущих / фрезеровочных инструментов для почвы, воздушного пространства и электронной индустрии. В нашу основную продукцию входит твердый карбид / быстрорежущая сталь, а также двигатели, микроэлектрические дрели, IC картонорезальные машины, фрезы для гравирования, режущие пилы, фрезеры-расширители, фрезеры-расширители с резцом, дрели, резаки форм для шлицевого вала / звездочки роликовой цепи, и специальные нано инструменты. Пожалуйста, посетите сайт www.tool-tool.com для получения большей информации.

BW is specialized in R&D and sourcing the most advanced carbide material with high-tech coating to supply cutting / milling tool for mould & die, aero space and electronic industry. Our main products include solid carbide / HSS end mills, micro electronic drill, IC card cutter, engraving cutter, shell end mills, cutting saw, reamer, thread reamer, leading drill, involute gear cutter for spur wheel, rack and worm milling cutter, thread milling cutter, form cutters for spline shaft/roller chain sprocket, and special tool, with nano grade. Please visit our web www.tool-tool.com for more info.

No comments: