JPH0134738B2 - - Google Patents
Info
- Publication number
- JPH0134738B2 JPH0134738B2 JP58201797A JP20179783A JPH0134738B2 JP H0134738 B2 JPH0134738 B2 JP H0134738B2 JP 58201797 A JP58201797 A JP 58201797A JP 20179783 A JP20179783 A JP 20179783A JP H0134738 B2 JPH0134738 B2 JP H0134738B2
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- coating layer
- hard coating
- brazed
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005520 cutting process Methods 0.000 claims description 29
- 239000011247 coating layer Substances 0.000 claims description 26
- 238000005229 chemical vapour deposition Methods 0.000 claims description 7
- 238000005240 physical vapour deposition Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229910000997 High-speed steel Inorganic materials 0.000 claims description 3
- 229910001315 Tool steel Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 238000005219 brazing Methods 0.000 description 20
- 239000010410 layer Substances 0.000 description 13
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 238000005553 drilling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000010730 cutting oil Substances 0.000 description 3
- 239000012495 reaction gas Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000007733 ion plating Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005480 shot peening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000669 Chrome steel Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- -1 iron group metals Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 102220259718 rs34120878 Human genes 0.000 description 1
- 102200082816 rs34868397 Human genes 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
Description
【発明の詳細な説明】
この発明は、ろう付けにより結合された表面被
覆焼結硬質合金チツプ（以下、被覆超硬合金チツ
プという）を具備する切削工具の製造法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cutting tool having surface-coated sintered hard alloy chips (hereinafter referred to as coated cemented carbide chips) bonded together by brazing.
従来、硬質相が主として元素周期律表の4a、
5a、および6a族金属の炭化物および窒化物のう
ちの１種または２種以上で構成され、一方結合相
が主として鉄族金属のうちの１種または２種以上
で構成された焼結硬質合金で製造されたチツプ
（以下、超硬合金チツプという）を、工具鋼や高
速度鋼などで製造された切削工具本体の所定個所
にろう付けしてなる超硬合金チツプろう付け切削
工具が提案され、その一部が実用に供されている
ことはよく知られるところである。 Traditionally, the hard phase was mainly 4a of the periodic table of elements,
A sintered hard alloy composed of one or more carbides and nitrides of group 5a and 6a metals, while the binder phase is mainly composed of one or more iron group metals. A cutting tool with brazed cemented carbide chips has been proposed in which manufactured chips (hereinafter referred to as cemented carbide chips) are brazed to predetermined locations on a cutting tool body made of tool steel, high-speed steel, etc. It is well known that some of them are in practical use.
一方、近年、加工能率の向上をはかる目的で、
切削速度の高速化が強く要望されるようになつて
いるが、上記の超硬合金チツプろう付け切削工具
は、耐摩耗性に劣るために前記の要望を十分満足
するものではなく、高速切削には適さないもので
あり、また、これを、例えば穴加工を行なうツイ
ストドリルやガンドリル、さらにはリーマなどと
して適用した場合には、周速の速いマージン部や
ガイドパツト部の摩耗が激しく、この結果仕上面
の劣化や切削抵抗の増大などをきたして十分満足
する性能が得られないばかりでなく、きわめて使
用寿命の短かいものであつた。 On the other hand, in recent years, with the aim of improving processing efficiency,
Although there is a strong demand for higher cutting speeds, the above-mentioned cemented carbide chip brazed cutting tools do not fully satisfy the above demand due to their inferior wear resistance, and are not suitable for high-speed cutting. Also, when this is used as a twist drill, gun drill, or even reamer for drilling holes, the margin parts and guide parts where the circumferential speed is high are subject to severe wear, resulting in poor finishing. Not only did it not provide satisfactory performance due to surface deterioration and increased cutting resistance, but it also had an extremely short service life.
また、上記の超硬合金チツプの表面に、化学蒸
着法を用い、元素周期律表の4a、5a、および6a
族の金属、並びにAlの炭化物、窒化物、硼化物、
および酸化物、さらにこれらの２種以上の固溶体
からなる群のうちの１種の単層または２種以上の
複層で構成された硬質被覆層を0.5〜15μｍの平均
層厚で被覆してなる被覆超硬合金チツプがスロー
アウエイチツプとして用いられているが、この被
覆超硬合金チツプは、切削工具本体の所要個所に
取り換え自在に機械的に取り付けて用いられるも
のであり、このチツプが切削工具本体にろう付け
により取付けられて使用されることはない。これ
は、前記被覆超硬合金チツプを切削工具本体にろ
う付けにより取り付けた場合、正確な寸法精度を
得ることができず、このため寸法出しのための研
削が必要となり、この結果前記研削によつて硬質
被覆層の一部が除去されてしまい、所望の耐摩耗
性を確保することができないという理由によるも
のである。 In addition, chemical vapor deposition was used to coat the surface of the cemented carbide chip with elements 4a, 5a, and 6a of the periodic table.
group metals, as well as carbides, nitrides, borides of Al,
and oxide, and a hard coating layer composed of a single layer or a multilayer of two or more of these solid solutions with an average layer thickness of 0.5 to 15 μm. A coated cemented carbide chip is used as a throw-away chip, and this coated cemented carbide chip is mechanically attached to the required location of the cutting tool body so that it can be replaced. It is not used by being attached to the main body by brazing. This is because when the coated cemented carbide chip is attached to the cutting tool body by brazing, accurate dimensional accuracy cannot be obtained, and therefore grinding is required to obtain the dimensions. This is because a part of the hard coating layer is removed, making it impossible to secure the desired wear resistance.
そこで、本発明者等は、上述のような観点か
ら、正確な寸法精度を有し、かつ耐摩耗性のすぐ
れた被覆超硬合金チツプろう付け切削工具を製造
すべく研究を行なつた結果、予め化学蒸着法によ
り形成した平均層厚：0.5〜15μｍの硬質被覆層を
有する被覆超硬合金チツプを、工具鋼または高速
度鋼製切削工具本体の所定個所にろう付けした
後、寸法出しを行なうための研削を施し、引続い
て物理蒸着法を用い、ろうの溶融点以下の温度
で、前記チツプの表面に、さらに平均層厚：0.5
〜10μｍの硬質被覆層を形成すると、前記研削に
よつて除去された硬質被覆層の部分は、物理蒸着
法により形成された硬質被覆層で被覆されるの
で、耐摩耗性を失うことなく、すぐれた耐摩耗性
が保持され、また化学蒸着法により形成された硬
質被覆層の残存部分は物理蒸着法により形成され
た硬質被覆層にて積層被覆されるので、一段とす
ぐれた耐摩耗性をもつようになり、しかも上記の
研削によつて正確な寸法精度が確保されるという
知見を得たのである。 Therefore, from the above-mentioned viewpoint, the present inventors conducted research in order to manufacture a coated cemented carbide tip brazed cutting tool that has accurate dimensional accuracy and excellent wear resistance. A coated cemented carbide chip having a hard coating layer with an average layer thickness of 0.5 to 15 μm, formed in advance by chemical vapor deposition, is brazed to a designated location on the main body of a cutting tool made of tool steel or high-speed steel, and then the dimensions are determined. Then, using a physical vapor deposition method, a further layer with an average thickness of 0.5 is applied to the surface of the chip at a temperature below the melting point of the solder.
When a hard coating layer of ~10 μm is formed, the portion of the hard coating layer removed by the grinding is covered with a hard coating layer formed by physical vapor deposition, so it has excellent wear resistance without losing wear resistance. Furthermore, since the remaining portion of the hard coating layer formed by chemical vapor deposition is covered with a hard coating layer formed by physical vapor deposition, it has even better wear resistance. Moreover, they found that the grinding described above ensures accurate dimensional accuracy.
この発明は、上記知見にもとづいてなされたも
のであつて、以下に実施例により具体的に説明す
る。 This invention was made based on the above findings, and will be specifically explained below using Examples.
実施例 １
第１図に斜視図で示される被覆超硬合金チツプ
ろう付けドリルを製造した。すなわち、まず、
Co；９％、TiC；10％、TaC；10％、WC；残
りからなる組成（以上重量％）をもつた所定形状
の超硬合金チツプを用意し、この超硬合金チツプ
における切削工具本体へのろう付け面をセラミツ
クス製保護板で覆つて硬質被覆層が形成されない
ようにした状態で化学蒸着装置内に装入し、
TiCl4：３％、N2：37％、H2：60％からなる組
成（以上容量％）を有する反応ガスを流しなが
ら、1000℃の反応温度で３時間の反応を行なうこ
とによつて、前記超硬合金チツプの表面に、
TiNからなる平均層厚：3μｍの硬質被覆層を形
成し、この被覆超硬合金チツプ１を図示されるよ
うに、SNCM−８製切削工具本体２に、ろうの
溶融温度以上の800℃の温度でろう付けし、シヨ
ツトピーニングを施した後、前記被覆超硬合金チ
ツプ１のマージン部（最外周面部）１ａを研削し
て正確な外径寸法出しを行なうと共に、逃げ面１
ｂを研削して正確な逃げ角とし、（図中１ｃはす
くい面を示す）さらに刃先にホーニングを施し、
ついで、この結果の被覆超硬合金チツプろう付け
ドリルを物理蒸着装置の１つであるイオンプレー
テイング装置に入れ、N2：80％、H2：20％から
なる組成（以上容量％）の反応ガスを導入してプ
ラズマを発生させ、ろうの溶融温度以下の温度で
ある500℃にて６時間の反応を行なうことによつ
てTiNからなる平均層厚：3μｍの硬質被覆層を
形成した。Example 1 A coated cemented carbide tip brazed drill shown in perspective view in FIG. 1 was manufactured. That is, first, a cemented carbide chip of a predetermined shape with a composition (by weight %) consisting of Co: 9%, TiC: 10%, TaC: 10%, and WC: the remainder is prepared. The surface to be brazed to the cutting tool body is covered with a ceramic protection plate to prevent the formation of a hard coating layer, and the cutting tool is loaded into a chemical vapor deposition equipment.
By conducting a reaction for 3 hours at a reaction temperature of 1000°C while flowing a reaction gas having a composition (volume %) of TiCl 4 : 3%, N 2 : 37%, H 2 : 60%, On the surface of the cemented carbide chip,
A hard coating layer made of TiN with an average layer thickness of 3 μm is formed, and this coated cemented carbide chip 1 is placed on a cutting tool body 2 made of SNCM-8 at a temperature of 800°C above the melting temperature of the wax. After brazing and shot peening, the margin portion (outermost peripheral surface) 1a of the coated cemented carbide chip 1 is ground to obtain an accurate outer diameter dimension, and the flank surface 1 is ground.
b is ground to obtain an accurate clearance angle (1c in the figure indicates the rake face), and the cutting edge is honed.
Next, the resulting coated cemented carbide chip brazing drill was placed in an ion plating device, which is one of the physical vapor deposition devices, to react with a composition (volume %) consisting of 80% N 2 and 20% H 2 . A gas was introduced to generate plasma, and a reaction was carried out for 6 hours at 500° C., which was below the melting temperature of the wax, to form a hard coating layer of TiN with an average layer thickness of 3 μm.
この結果得られた本発明被覆超硬合金チツプろ
う付けドリルと、硬質被覆層の形成がない以外は
同一の条件で製造した従来超硬合金チツプろう付
けドリルについて、
被削材 ：S45C（硬さ：HB240）、
切削速度：80ｍ／min、
送 り ：0.3mm／回、
切削油 ：使用、
の条件で切削試験を行ない、使用寿命に至るまで
の穿孔長さを測定したところ、本発明被覆超硬合
金チツプろう付けドリルは、17ｍの穿孔長さで寿
命に至つたのに対して、従来超硬合金チツプろう
付けドリルは８ｍで寿命となるものであつた。 As for the coated cemented carbide tip brazing drill of the present invention obtained as a result, and the conventional cemented carbide tip brazing drill manufactured under the same conditions except that no hard coating layer was formed, workpiece material: S45C (hardness : H B 240), Cutting speed: 80m/min, Feed rate: 0.3mm/times, Cutting oil: When the cutting test was conducted under the following conditions, and the drilling length until the end of the service life was measured, it was found that the present invention The coated cemented carbide tip brazing drill reached the end of its life after a drilling length of 17 m, whereas the conventional cemented carbide tip brazing drill had a life of 8 m.
実施例 ２
第２図ａおよびｂにそれぞれ平面図および側面
図で示される被覆超硬合金チツプろう付け突切り
バイトを製造した。すなわち、まず、Co；９％、
TiC；10％、TaC；10％、WC；残りからなる組
成（以上重量％）を有する所定形状の超硬合金チ
ツプを用意し、この超硬合金チツプを、実施例１
におけると同様にろう付け面に硬質被覆層が形成
されないようにした状態で、化学蒸着装置に装入
し、TiCl4：２％、CH4：1.5％、H2：96.5％から
なる組成を有する反応ガスを流しながら、1000℃
の反応温度で２時間の反応を行なつて、前記超硬
合金チツプの表面にTiCからなる平均層厚：3μｍ
の内層としての硬質被覆層を形成し、さらに反応
ガス組成を、AlCl3：２％、CO2：３％、H2：95
％からなるものとし、かつ反応温度を990℃とし
て1.5時間の反応を行なうことによつて前記内層
の上にさらにAl2O3からなる平均層厚：1μｍの外
層としての硬質被覆層を形成し、このようにして
得られた被覆超硬合金チツプ１を、図示されるよ
うに、SCM−４製切削工具本体２に、実施例１
におけると同様にろう付けし、シヨツトピーニン
グを施した後、前記被覆超硬合金チツプ１の側面
１ｄを研削して正確な溝寸法が得られるように
し、（図中１ｂ：逃げ面、１ｃ：すくい面を示す）
引続いて、この結果の被覆超硬合金チツプろう付
け突切りバイトを、物理蒸着装置の１つであるイ
オンプレーテイング装置に装入し、実施例１にお
けると同一の条件でTiNからなる平均層厚：3μ
ｍの硬質被覆層を形成することによつて本発明被
覆超硬合金チツプろう付け突切りバイトを製造し
た。Example 2 A coated cemented carbide chip brazed parting tool shown in plan and side view in FIGS. 2a and b, respectively, was manufactured. That is, first, Co; 9%,
A cemented carbide chip of a predetermined shape having a composition (by weight %) consisting of TiC: 10%, TaC: 10%, and WC: the rest was prepared, and this cemented carbide chip was
The material was charged into a chemical vapor deposition apparatus in a state in which no hard coating layer was formed on the brazing surface, and had a composition of TiCl 4 : 2%, CH 4 : 1.5%, H 2 : 96.5%. 1000℃ while flowing reaction gas
The reaction was carried out for 2 hours at a reaction temperature of
A hard coating layer was formed as an inner layer, and the reaction gas composition was changed to AlCl 3 : 2%, CO 2 : 3%, H 2 : 95.
%, and by conducting the reaction for 1.5 hours at a reaction temperature of 990°C, a hard coating layer as an outer layer made of Al 2 O 3 with an average thickness of 1 μm was further formed on the inner layer. The coated cemented carbide chip 1 thus obtained was placed in a cutting tool body 2 made of SCM-4 as shown in Example 1.
After brazing and shot peening in the same manner as in Figure 1, the side surface 1d of the coated cemented carbide chip 1 is ground to obtain accurate groove dimensions (1b: flank surface, 1c: flank surface in the figure). (indicates rake face)
Subsequently, the resulting coated cemented carbide chip brazing parting tool was loaded into an ion plating device, which is one of the physical vapor deposition devices, and an average layer of TiN was formed under the same conditions as in Example 1. Thickness: 3μ
A coated cemented carbide chip brazed parting tool of the present invention was manufactured by forming a hard coating layer of m.
この結果得られた本発明被覆超硬合金チツプろ
う付け突切りバイトは、その被覆超硬合金チツプ
における逃げ面１ｂとすくい面１ｃが、TiC：3μ
ｍ、Al2O3：1μｍ、およびTiN：3μｍからなる積
層の硬質被覆層で被覆され、一方その側面１ｄが
TiN：3μｍからなる硬質被覆層で被覆されるも
のであつた。 The coated cemented carbide chip brazing parting tool of the present invention obtained as a result has a flank face 1b and a rake face 1c of the coated cemented carbide chip of TiC: 3μ
m, Al 2 O 3 : 1 μm, and TiN: 3 μm.
It was coated with a hard coating layer of TiN: 3 μm.
上記本発明被覆超硬合金チツプろう付け突切り
バイトと、硬質被覆層の形成を全く行なわない以
外は同一の条件で製造した従来超硬合金チツプろ
う付け突切りバイトを、材質がSCM−４（硬さ：
HB140）からなる直径：15mmφの丸棒の突切り加
工に用いたところ、前者の突切りバイトは4000個
を加工することができたのに対して、後者の突切
りバイトは1000個しか加工することができないも
のであつた。 The coated cemented carbide chip brazed parting tool of the present invention described above and the conventional cemented carbide chip brazed parting tool manufactured under the same conditions except that no hard coating layer was formed were made of SCM-4 ( Hardness:
When used to cut off a round bar with a diameter of 15 mmφ made of H B 140), the former cut-off bit was able to cut 4000 pieces, while the latter cut-off bit could only cut 1000 pieces. It was something that could not be processed.
実施例 ３
第３図に正面図で示される被覆超硬合金チツプ
ろう付けサイドカツタを製造した。すなわち、
Co；８％、TiC；12％、TaC；６％、WC；残り
からなる組成（以上重量％）を有する所定形状の
超硬合金チツプを用意し、この超硬合金チツプの
ろう付け面を除く表面部分に実施例１におけると
同一の条件で、TiNからなる平均層厚：3μｍの
硬質被覆層を形成し、ついでこの結果得られた被
覆超硬合金チツプ１を、図示されるようにSCM
−４製切削工具本体２に同じく実施例１における
と同一の条件でろう付けした後、被覆超硬合金チ
ツプ１の逃げ面１ｂを研削して寸法出しを行ない
（図中１ｃはすくい面を示す）、さらに0.1mmの面
取り（チヤンフアホーニング）を施し、引続いて
物理蒸着装置の１つであるスパツタリング装置を
用い、ろうの溶融点以下の温度である300℃にて
スパツタ反応を起さしめることによつて、前記被
覆超硬合金チツプ１の表面にTiNからなる平均
層厚：2μｍの硬質被覆層を形成した。Example 3 A coated cemented carbide tip brazed side cutter shown in front view in FIG. 3 was manufactured. That is,
Prepare a cemented carbide chip of a predetermined shape with a composition (more than % by weight) consisting of Co: 8%, TiC: 12%, TaC: 6%, WC: remainder, and remove the brazed surface of this cemented carbide chip. A hard coating layer made of TiN with an average layer thickness of 3 μm was formed on the surface portion under the same conditions as in Example 1, and then the coated cemented carbide chip 1 obtained as a result was subjected to SCM as shown in the figure.
After brazing to the cutting tool body 2 made of A-4 under the same conditions as in Example 1, the flank face 1b of the coated cemented carbide chip 1 was ground to obtain dimensions (1c in the figure indicates the rake face). ), and then a 0.1 mm chamfer (chamfer honing) is applied, followed by a sputtering reaction using a sputtering device, which is a type of physical vapor deposition device, at a temperature of 300°C, which is below the melting point of the wax. Specifically, a hard coating layer made of TiN and having an average layer thickness of 2 μm was formed on the surface of the coated cemented carbide chip 1.
この結果得られた本発明被覆超硬合金チツプろ
う付けサイドカツタと、硬質被覆層を形成しない
以外は同一の条件で製造した従来超硬合金チツプ
ろう付けサイドカツタを、
被削材：S55C、
切削速度：100ｍ／min、
切込み：２mm、
送り：0.23mm／刃、
切削油：使用、
の条件での切削試験に供したところ、本発明被覆
超硬合金チツプろう付けサイドカツタは、100分
の切削後、熱クラツクの発達によりチツピングが
生じ寿命に至つたのに対して、従来超硬合金チツ
プろう付けサイドカツタは、40分の切削後、すく
い面摩耗の進行によつてチツプ（切刃）が脱落
し、使用寿命に至るものであつた。 The coated cemented carbide tip brazed side cutter of the present invention obtained as a result and the conventional cemented carbide tip brazed side cutter manufactured under the same conditions except that no hard coating layer was formed were as follows: Work material: S55C, Cutting speed: When subjected to a cutting test under the following conditions: 100 m/min, depth of cut: 2 mm, feed rate: 0.23 mm/blade, cutting oil: In contrast to conventional side cutters with brazed cemented carbide tips, the chips (cutting edges) would fall off due to progressive wear on the rake face after 40 minutes of cutting, leading to the end of the service life due to chipping due to the development of cracks. It amounted to .
実施例 ４
第４図ａおよびｂにそれぞれ平面図および側面
図で示される被覆超硬合金チツプろう付けガンド
リルを製造した。すなわち、まず、Co；６％、
WC；残りからなる組成（以上重量％）を有する
所定形状の超硬合金チツプを用意し、この超硬合
金チツプを、ろう付け面をセラミツク板で覆つた
状態で化学蒸着装置に装入し、実施例２における
と同一の条件にてTiCからなる平均層厚：3μｍの
硬質被覆層を前記超硬合金チツプの表面に形成
し、この結果得られた被覆超硬合金チツプ１を、
図示されるようにクロム鋼製切削工具本体２に実
施例１におけると同一の条件でろう付けした後、
被覆超硬合金チツプ１の最外周面部１ｅおよびパ
ツト部外面１ｆを研削して正確な穴径が確保でき
るようにし、さらに逃げ面１ｂも研削して寸法出
しを行ない（図中１ｃはすくい面を示す）、引続
いて、このガンドリルをスパツタリング装置に装
入し、実施例３におけると同一の条件にて、その
表面にTiNからなる平均層厚：2μｍの硬質被覆
層を形成した。EXAMPLE 4 A coated cemented carbide tip brazed gun drill, shown in plan and side view, respectively, in FIGS. 4a and 4b was manufactured. That is, first, Co; 6%,
Prepare a cemented carbide chip of a predetermined shape having a composition (the above weight %) consisting of WC; and load this cemented carbide chip into a chemical vapor deposition device with the brazing surface covered with a ceramic plate, A hard coating layer made of TiC with an average layer thickness of 3 μm was formed on the surface of the cemented carbide chip under the same conditions as in Example 2, and the coated cemented carbide chip 1 obtained as a result was
As shown in the figure, after brazing to the chrome steel cutting tool body 2 under the same conditions as in Example 1,
The outermost peripheral surface 1e and the outer surface 1f of the pad part of the coated cemented carbide chip 1 are ground to ensure an accurate hole diameter, and the flank surface 1b is also ground to obtain dimensions (in the figure, 1c is the rake surface). Subsequently, this gun drill was placed in a sputtering device, and under the same conditions as in Example 3, a hard coating layer made of TiN and having an average layer thickness of 2 μm was formed on its surface.
この結果得られた本発明被覆超硬合金チツプろ
う付けガンドリルと、硬質被覆層の形成を全く行
なわない以外は同一の条件で製造した従来超硬合
金チツプろう付けガンドリルを、
被削材 ：FC25（硬さ：HB210）、
切削速度：90ｍ／min、
送 り ：0.02mm／rev.、
穴 径 ：15mm（公差：３／100mm）、
穴 長 ：100mm、
切削油 ：使用、
の条件での切削に供し、穴径に寸法公差不良が発
生するまでの加工穴数を測定したところ、本発明
被覆超硬合金チツプろう付けガンドリルは700穴
を加工することができたのに対して、従来超硬合
金チツプろう付けガンドリルは250穴の加工で寿
命に至つた。 The coated cemented carbide tip brazed gun drill of the present invention obtained as a result and a conventional cemented carbide tip brazed gun drill manufactured under the same conditions except that no hard coating layer was formed were used as work material: FC25 ( Hardness: H B 210), cutting speed: 90m/min, feed: 0.02mm/rev., hole diameter: 15mm (tolerance: 3/100mm), hole length: 100mm, cutting oil: used, under the following conditions. When the number of holes machined until a dimensional tolerance defect occurred in the hole diameter was measured, the coated cemented carbide tip brazed gun drill of the present invention was able to machine 700 holes, whereas it was faster than the conventional one. The hard metal chip brazed gun drill reached the end of its life after drilling 250 holes.
上述のように、この発明の方法によれば、寸法
精度が高く、かつ耐摩耗性にすぐれた被覆超硬合
金チツプろう付け切削工具を製造することがで
き、したがつて、これを実用に供した場合には、
すぐれた切削性能を著しく長期に亘つて発揮する
などの工業上有用な効果がもたらされるのであ
る。 As described above, according to the method of the present invention, a coated cemented carbide tip brazed cutting tool with high dimensional accuracy and excellent wear resistance can be manufactured, and therefore it is possible to put this into practical use. If you do,
Industrially useful effects such as excellent cutting performance for a long period of time are brought about.
第１図は被覆超硬合金チツプろう付けドリルの
斜視図、第２図は被覆超硬合金チツプろう付け突
切りバイトを示し、ａは正面図、ｂは側面図、第
３図は被覆超硬合金チツプろう付けサイドカツタ
の正面図、第４図は被覆超硬合金チツプろう付け
ガンドリルを示し、ａは正面図、ｂは側面図であ
る。図面において、
１……被覆超硬合金チツプ、１ａ……マージン
部（最外周面部）、１ｂ……逃げ面、１ｃ……す
くい面、１ｄ……側面、１ｅ……最外周面部、１
ｆ……パツト部の外面、２……切削工具本体。
Figure 1 is a perspective view of a coated carbide tip brazing drill, Figure 2 is a coated carbide tip brazing cut-off bit, a is a front view, b is a side view, and Figure 3 is a coated carbide tip brazing drill. FIG. 4 shows a coated cemented carbide tip brazing gun drill, in which a is a front view and b is a side view. In the drawings, 1...Coated cemented carbide chip, 1a...Margin part (outermost circumferential surface), 1b...Fleet surface, 1c...Rake face, 1d...Side surface, 1e...Outermost circumferential surface, 1
f... Outer surface of the part, 2... Cutting tool body.
Claims (1)
有する表面被覆焼結硬質合金チツプを、工具鋼ま
たは高速度鋼製切削工具本体の所定個所にろう付
けした後、寸法出しを行なうための研削を施し、
引続いて、物理蒸着法を用い、ろうの溶融点以下
の温度で、前記チツプの表面に、さらに硬質被覆
層を積層形成することを特徴とする表面被覆硬質
合金チツプをろう付けした切削工具の製造法。1 A surface-coated sintered hard alloy chip having a hard coating layer formed in advance by chemical vapor deposition is brazed to a predetermined location on a cutting tool body made of tool steel or high-speed steel, and then ground for dimensioning. ,
Subsequently, a hard coating layer is further laminated on the surface of the chip using a physical vapor deposition method at a temperature below the melting point of the solder. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20179783A JPS6094232A (en) | 1983-10-27 | 1983-10-27 | Method of manufacturing cutting tool which is brazed with surface covering sintered hard alloy tip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20179783A JPS6094232A (en) | 1983-10-27 | 1983-10-27 | Method of manufacturing cutting tool which is brazed with surface covering sintered hard alloy tip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6094232A JPS6094232A (en) | 1985-05-27 |
| JPH0134738B2 true JPH0134738B2 (en) | 1989-07-20 |
Family
ID=16447089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20179783A Granted JPS6094232A (en) | 1983-10-27 | 1983-10-27 | Method of manufacturing cutting tool which is brazed with surface covering sintered hard alloy tip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6094232A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006068877A (en) * | 2004-09-06 | 2006-03-16 | Osg Corp | Double-margin drill |
| JP4707414B2 (en) * | 2005-03-04 | 2011-06-22 | ユニタック株式会社 | Drill head |
| JP2006346739A (en) * | 2005-06-20 | 2006-12-28 | Daia Tool Kogaku Kk | Rotary cutting tool |
| JPWO2014006718A1 (en) * | 2012-07-05 | 2016-06-02 | 有限会社クローバーテック | Cutting tool manufacturing method and cutting tool using the same |
| JP6180043B2 (en) * | 2015-11-09 | 2017-08-16 | 康平 谷 | Metal joining method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119337A (en) * | 1980-02-23 | 1981-09-18 | Taisuke Kakiuchi | Production of chisel for chipping building stone or the like |
| JPS56166370A (en) * | 1980-05-27 | 1981-12-21 | Mitsubishi Metal Corp | Surface coated tool member of superior abrasion resistance and corrosion resistance |
-
1983
- 1983-10-27 JP JP20179783A patent/JPS6094232A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119337A (en) * | 1980-02-23 | 1981-09-18 | Taisuke Kakiuchi | Production of chisel for chipping building stone or the like |
| JPS56166370A (en) * | 1980-05-27 | 1981-12-21 | Mitsubishi Metal Corp | Surface coated tool member of superior abrasion resistance and corrosion resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6094232A (en) | 1985-05-27 |
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