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D-Straight drill form class

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E-Knife round bottom line

EA-BOWL & TRAY BIT
EB-COVE BOX BIT
EC-ROUND NOSE BIT
ED-ROUND CARVING BIT
EE-TRIM BIT
EF-LONG BLADE ROUND NOSE BIT

F-Convex half circular knife

FA-CORNER ROUND BIT
FB-BEARING BIT
FC-FINGER NAIL TYPE BIT
FD-CONVEX EDGING BIT
FE-HALF ROUND SIDE CUTTER BIT
FF-BULL NOSE RADIUS BIT
FG-TRIM BIT

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刀具涂层原理及可行性分析

发布时间:2013-08-08

   根据金属切削原理,在正常切削时,刀具的磨损主要包括以下几种:后刀面磨损;前刀面磨损,即月牙洼磨损;前后刀面同时磨损。

    刀具涂层是指在强度和韧性较好的硬质合金或高速钢(HSS)基体表面上,利用气相沉积方法涂覆一薄层耐磨性好的难熔金属或非金属化合物,涂层作为一个化学屏障和热屏障,减少了刀具与工件间的扩散和化学反应,从而减少了月牙洼磨损。涂层刀具具有表面硬度高、耐磨性好、化学性能稳定、耐热耐氧化、摩擦因数小和热导率低等特性。如图为欧瑞康巴尔查斯(OerlikonBalzers)所做的涂层刀具与未涂层刀具的切削状况示意图。  

    未涂层刀具与涂层刀具切削微观示意图

    未涂层刀具,因摩擦系数大等原因存在严重的积屑瘤

涂层后的刀具,摩擦系数小,无明显积屑瘤

    物理气相沉积(PVD)是一种物理气相反应生长法。沉积过程是在真空或低气压气体放电条件下,即在低温等离子体中进行的。涂层的物质源是固态物质,经过“蒸发或溅射”后,在工件表面生成与基材性能完全不同的新的固态物质涂层。PVD涂层材料主要为TiN,TiCN,CrN,TiAlN,AlTiN,AlCrN,WC/C,DLC和金刚石等成份,不同的应用领域,需选用不同的涂层材料。涂层的厚度通常只有几个微米,硬度却是钢铁的2到5倍。欧瑞康巴尔查斯(OerlikonBalzers)涂层公司发明了用铬元素取代钛元素的涂层技术,并于2004年推出了商品名为“BalinitAlcorna”的单层AlCrN涂层。AlCrN涂层的高红硬性使其在极高的热负荷下仍可保持性能稳定,在高速切削、干式(或准干式)切削加工条件应用试验证明性能优异,涂层的高硬度和抗磨损性使得可切削材料硬度达到HRC70。

    贯通轴产品材料为49CrMo4,热处理技术要求为:感应淬火效硬化层深度5-7mm,表面硬度50-55HRC,心部为调质组织,硬度要求35-40HRC。从理论上分析完全可以应用该涂层刀具切削热后贯通轴。

    选用花键滚刀,在经欧瑞康巴尔查斯(OerlikonBalzers)涂层后,进行工艺试验。工艺方法为:热前磨外圆C—滚花键D——热后C处校直——热后滚花键B,将原滚花键工序转移至热后进行加工。

    在原来切削参数不变(S=250r/minF=13m/min)的情况下,加工噪音明显降低。对加工出产品进行了质量跟踪,将任意抽检10件贯通轴花键跳动及M值变动量,从记录数据可以看出,应用涂层刀具热后滚切贯通轴加工精度完全符合图纸要求,该精度要求可以取消偏离。M值变动量减小后提高了与凸缘装配后侧隙变动量,从而提高了装配精度。



H-Classical linear decorative knives

HA-CLASSICAL MOULDING BIT
HB-CLASSICAL MOULDING BIT WITHOUT BEARING
HB-Bilateral double R line knife
HC-CURVED LING BIT
HD-CLASSICAL BIT
HE-CLASSICAL BIT WITHOUT BEARING
HF-DOUBLE ROMAN BIT
HG-DOUBLE ROMAN BIT WITHOUT BEARING
HH-ROMAN OGEE BIT
HI-ROMAN OGEE BIT WITHOUT BEARING
HJ-CLASSICAL OGEE BIT
HK-CLASSICAL OGEE BIT
HL-WAVY EDGE BIT
HM-WAVY EDGE BIT WITHOUT BEARING
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HO-CLASSICAL BIT
HP-CLASSICAL BIT
HQ-Magic Knife
HR-Butterfly knife
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HT-CLASSICAL MOULDING BIT WITHOUT BEARING
HU-CLASSICAL MOULDING BIT
HV-CLASSICAL MOULDING BIT WITHOUT BEARING

I-Beaded Curve Knife

IA-DOUBLE BEADING BIT
IB-DOUBLE BEADING BIT
IC-DOUBLE BEADING BIT
ID-DRAGON BALL BIT
IE-A TYPE DRAWING LINE BIT
IF-DOUBLE DRAGON BALL BIT
IG-DRAGON BALL BIT

J-Crown curve decoration knives

JA-EDGE MOULDING BIT
JB-PALACE TYPE BIT
JC-CROWN MOULDING BIT
JD-CROWN MOULDING BIT
JE-CROWN MOULDING BIT
JF-CROWN MOULDING BIT

K-Architectural decorative knives streamlined

KA-DOUBLE ROUND NOSE BIT
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KD-FISH HANDRAIL BIT
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KF-VARIABLE-BEADING BIT
KG-CROWN MOULDING BIT
KH-HANDRAIL BIT

L-Rail line/line Knife

LA-TABLE EDGE BIT
LB-TABLE OGEE BIT
LC-TABLE CORNER BIT
LD-HANDRAIL CLASSICAL BIT
LE-TABLE CURVED ROUND BIT
LF-TRADITIONAL BIT
LG-15Degree HORSE NOSE BIT
LH-ROMAN CLASSICAL BIT
LI-TRADITIONAL BIT
LJ-TABLE EDGE BIT

M-Combination of high handrail Knife Bottle

MA-HANDRAIL BIT
MB-HANDRAIL BIT
MC-HANDRAIL BIT

N-Polymorphic classical Knife

NA-VERTICAL BIT
NB-RAISED PANEL BIT
NC-PANEL BIT
ND-15 degrees plate type knife
NE-45 Degree PANEL BIT
NF-UNDERMOUNT BOWL BIT
NG-S-TYPE BIT

O-Knife nail-like model lines

OA-FINGER GRIP BIT
OB-DOUBLE FINGER BIT
OC-A TWO SLOPES FINGERNAIL BIT
OD-SIDE FINGER NAIL TYPE BIT
OE-ARCH TYPE ROUTER BIT
OF-ARCH TYPE ROUTER BIT
OG-FINGER NAIL BIT

P-T-tenon Knife

PA-DRAWER LOCK BIT
PB-T-TYPE SLOTTING CUTTER
PC-KEYHOLE BIT
PD-T-SLOT ROUTER BIT
PE-T-TYPE BIT WITH BEARING
PF-HINGE BIT
PG-JOINT BIT
PH-MITER BIT
PI-T-SLOT ROUTER BIT
PK-Long households knife

Q-T-tenon cutter combination of class

QA-BEAD & FLUTE BITS
QB-TONGUE & GROOVE BITS
QC-STYLE & RAIL ASSEMBLES
QD-STYLE & RAIL ASSEMBLES
QE-STYLE & RAIL ASSEMBLES
QF-STYLE & RAIL ASSEMBLES
QG-TONGUE & GROOVE BITS

R-Door Knife

RA-Tanaka knife
RB-Oblique arc knife
RC-Cascade knife
RD-Curved knife
RE-Feng cutter
RF-Qingping knife
RG-Type clever knife
RH-Thin round knife
RI-Liu knife edge
RJ-Kocho knife
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RL-CLASSICAL PLUNGE BIT
RM-CLASSICAL PLUNGE BIT
RN-CLASSICAL PLUNGE BIT
RO-15Degree HORSE NOSE BIT
RP-10Degree HORSE NOSE BIT
RQ-OPEN-END CARVING BIT
RR-FLAT BOTTOM CUTTER

T-Solid Carbide cutting knives

TCT-SOLID CARBIDE STRAIGHT BIT

U-Other series

UA-Spindle machine flat knife, four planing knives
UB-Finger Joint Cutter Series
UC-Circular knife
UD-Speaker Knife
UE-A knife series
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UI-Wallboard knife
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