20200227103734031.pdf - 第110页

参考资料 Reference information D D 01 刀具寿命的修正参数 CORRECTION FACTOR FOR THE LIFETIME OF TOOLS 1 2 在切削加工中，为了进一步提高刀具的使用寿命，或者提高金属切除率，可以通过下表对刀具的寿命，及切削速度进行计算和调整： In order to further increase the lifetime of the tools and the cutti…

A guide to the applications of cemented

carbide brazed tips

The structure of brazed tips tools should be tough enough

Enough toughness shall be guaranteed by the maximum allowable sizes of the tips

and by using a rather strong steel grade and heat treatment.

Cemented carbide tips should be strongly fixed securely

The cemented carbide tips should have a secure xation and it is guaranteed by

the Flutes of the tool holders and the quality in welding, so the utes of the tools holders

must be selected based on the shapes and the geometrical parameters of the tips.

Before welding of the tips to the tool holders, a check must be done on the tips And

the tool holders. An initial check must be done to ensure that there is no serious bending

on the support surface of the tips. There shall be no serious carbulization on the welding

surface of the tips and at the same time the contaminants on the surface of the tips and

in the utes of the tools holders must be eliminated to ensure the quality of a secure

welding.

There are requirements for the welding materials

In order to endure the toughness of the welding, a suitable welding material must

be selected. During the welding, good wettability and owability must be guaranteed and

the air bulbs must be got ridden of in order to ensure the sufcient contact of the welding

material and the surface of the tips to be welded leaving nothing to be welded.

There are requirements for the flux in the welding process

It is recommended that industrial borax is to be used. Before the use of the borax, it

should be dewatered in a drying oven and then milled and sieved to get rid of the foreign

objects.

During the welding of cemented carbide tips of ne grain size with high titanium and

low cobalt content and long and thin cemented carbide tips it will be recommended that

compensation shims of a thickness of 0.2-0.5mm or similar shims with holes of l-2mm in

order to reduce the stress in the welding process.

As cemented carbide tips are rather brittle and are most sensitive to the formation

of cracks. excessive heating or rapid cooling must be prevented in the grinding of the

tools and at the same time, grinding wheels with an appropriate grain size and hardness

must be selected and a proper grinding technique to avoid cracks in the grinding of the

edges of the tips and not to affect the lifetime of the tools.

When the tools are installed, the length of the tips outstretching the tools must be

as less as possible, as otherwise the vibration of the tools will occur thus damaging the

cemented carbide tips.

When the tools come to a normal bluntness, they must be reground. The edges

and the radius of the edges must be ground with oilstones after the tools are ground to

increase the lifetime and reliability of the tools.

硬质合金焊接刀片

Cemented Carbide Brazed Tips

参考资料

Reference information

刀具寿命的修正参数

CORRECTION FACTOR FOR THE LIFETIME OF TOOLS

在切削加工中，为了进一步提高刀具的使用寿命，或者提高金属切除率，

可以通过下表对刀具的寿命，及切削速度进行计算和调整：

In order to further increase the lifetime of the tools and the cutting efciency, the lifetime of the

tools and cutting speeds can be calculated & adjusted based on the following table:

工件材料硬度( HB)与切削速度修正系数,如果工件材料的硬度值与表中的

硬度值有差异，那么切削速度应乘以表中的修正系数。

The correcion factor of the hardness of the workpiece(HB)and the cutting speed.If the value

of hardness of the workpiece is differs from he value of hardness in the table, then the cutting

speed should be multiplied by the correction factor.

例如：如果推荐切削速度Vc=214m/min，那么当需保证刀具寿命45分钟时，其计算切削速度为

14x0.72=154m/min

注：当增加进给量时，要根据表中推荐的切削参数应适当降低切削速度。

Example: If the recommended cutting speed is Vc=214mm/min. the cutting speed can be calculated by the

formula 214x0.72=154m/min to ensure a lifetime of 45 minutes for the tool

Note: When the feed is increased. the cutting speed should be suitably decreased as per the

recommended cutting parameters in the table.

刀具寿命（分）

Lifetime of tools(min)

10 15 20 25 30 45 60

校正系数

Correction factor

1.11 1.0 0.93 0.87 0.81 0.72 0.66

ISO 分类

HB -60 -40 -20 0 +20 +40 +60 +80 +100

180 1.44 1.25 1.11 1.0 0.91 0.84 0.77 0.72 0.67

180 1.42 1.24 1.11 1.0 0.91 0.84 0.78 0.73 0.68

200 1.10 1.13 1.06 1.0 0.95 0.90 0.86 0.82 0.79

例如：如用YT14合金刀片切削硬度值HB180的GCr15钢时其切削参数为：Vc=150m/min、f=0.2mm/r、

ap=2.0mm．那么在给定的硬度值HB180与HB200间的差值是+20．此时表中的值正系数是0.91，那么

HB200的调整切削速度应为：150m/minX0.91=136.5m/min.

Example: If inserts of grade YT14 are used to machining GCr15 steel with a hardness of Hb180 & the cutting

parameters are: Vc=150mm. min. f=0.2mm. ap=2.0mm. then difference between the given

hardness value of HB180 and HB200 is +20. The correction factor in the table is 0.91 and the

adjusted cutting speed shall be : 150m/min.x0.91=136.5m/min .

参考资料

Reference information

材料

类别

中国美国法国德国日本英国

GB SAE AISI NF DIN JIS B.S

Super quality carbon structuralsteel

优质碳素结构钢

05F 1006 C1006 En2A/1

08 1008 C1008 S9CK En2A/1

08F 1006 C1006 SPCH1 En2A

10 1010 C1012 XC10 C10,CK10 S10C En2A

10F 1010 C1010 SPH2 En2E

15 1015 C1015 XC12 C15,CK15 S15C En2B

15F En3A

20 1020 C1020 XC18 C20,C22 S20C En2C

20F 1020 C1020 SPH3 En3

25 1025 C1025 C25 S25C En4

30 1030 C1030 XC32 S30C En8A

35 1035 C1035 XC35 C35,CK35 S35C En6

40 1040 C1040 XC42 S40C En8D

45 1045 C1045 XC45 C45,CK45 S45C En43J

50 1050 C1050 XC48 C50,CK53 S50C En9K

55 1055 C1055 XC55 Cf56 S55C En43D

60 1060 C1060 C60,DK60 En42B

65 1065 C1065 XC65 CK67 En42C

70 1070 C1070 XC70 CK70 En42T

75 1074 C1074 C75 En32B

80 1078 C1078 XC80 En3C

85 1085 C1085 En3B

15Mn 1016 C1016 En5

20Mn 1022 C1022

25Mn 1026 C1026 En8

30Mn 1033 C1033 En43B

35Mn 1037 C1037 En43A

40Mn 1039 C1039 40Mn4

45Mn 1046 C1046

50Mn 1050 C1050

Spring steel

弹簧钢

65Mn 1055 1055 En49A

55MnSi 53MnSi4

55SiMn 6254 6254 55Si7

60SiMn 65SiMn5

55Si2Mn 9255 9255 55S6 55Si7 En45

60SiMnA 9260 9260 65Si7 SUP7 En45A

63Si2MnA 66Si7

60Si2CrA 9262 9262 67SiCr5

50CrMn SUP9

50CrVA 6150 6150 50CV4 50CrV4 SUP10 En47,En50

50CrMnVA

钢材对照表

COMPARISON TABLE OF STEEL

Material