JPS6228105A - Cemented carbide solid drill and its manufacture - Google Patents
Cemented carbide solid drill and its manufactureInfo
- Publication number
- JPS6228105A JPS6228105A JP16717385A JP16717385A JPS6228105A JP S6228105 A JPS6228105 A JP S6228105A JP 16717385 A JP16717385 A JP 16717385A JP 16717385 A JP16717385 A JP 16717385A JP S6228105 A JPS6228105 A JP S6228105A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- cemented carbide
- solid
- die
- round bar
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/004—Article comprising helical form elements
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は穴あけ加工に用いられれる油穴付超硬ソリッド
ドリルとその製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid carbide drill with an oil hole used for drilling, and a method for manufacturing the same.
トリルは一般に螺旋状の刃を有するボディとシャンクと
からなっているが、穴あけ作業中切刃の温度上昇を防止
するとともに切りくずの排出を容易にするために、切削
油を注入する必要がある。Trills generally consist of a body with a spiral blade and a shank, but it is necessary to inject cutting oil to prevent the temperature of the cutting blade from rising during drilling operations and to facilitate chip evacuation. .
このため複数本の袖穴を有するドリルが市販されている
が、そのトリルは鋼製である。この鋼製のドリルは複数
本のストレートの穴を形成後、ボディを熱間でねじるこ
とにより得られる。このような方法は鋼のような延性の
ある材料では可能であるが、超硬合金のような脆性材料
では不可能であった。そこで従来超硬ドリルの場合、ド
リルにより形成された穴の入口から切削油を注入してい
たので、切刃の十分な冷却ができないのみならず切屑の
排出も不十分であった。For this reason, drills with multiple side holes are commercially available, but the drills are made of steel. This steel drill is obtained by hot twisting the body after forming multiple straight holes. Such a method is possible with ductile materials such as steel, but not with brittle materials such as cemented carbide. Therefore, in the case of conventional carbide drills, cutting oil was injected from the entrance of the hole formed by the drill, which not only did not allow sufficient cooling of the cutting edge but also insufficient discharge of chips.
最近、粘着力のある半流動性あるいは流動性の一時的結
合剤を添加したペースト状の超硬合金原料を螺旋状のガ
イドピンを有する押出用ダイから押し出すとともに、押
し出した部分に適当なねじりを加えることにより超硬刃
部を形成し、それをダイス１へドリル本体に接合してな
る先むくドリルが提案された（特開昭！５４−１５９７
９１号）。Recently, a paste-like cemented carbide raw material to which a sticky semi-fluid or fluid temporary binder has been added is extruded through an extrusion die with a helical guide pin, and the extruded part is given an appropriate twist. A pointed drill was proposed in which a carbide cutting part was formed by adding a carbide cutting part, and this was joined to the die 1 and the drill body (Japanese Patent Application Laid-Open No. 54-1597).
No. 91).
しかしながら、このような方法においてガイドピンによ
り形成される袖穴の精度は必ずしも十分でなく、ツイス
トトリル本体の袖穴と超硬刃部の袖穴とを正確に位置決
めして接合するのは極めて困難である。また超硬刃部が
接合されているのでドリルの強度は必ずしも満足ではな
い。その上、押出工程は押出速度とねしり速度を正確に
コントロールして行なわなければならず、実用上困難な
点が多くて生産性が悪いといわざるを得ない。However, in this method, the precision of the armhole formed by the guide pin is not necessarily sufficient, and it is extremely difficult to accurately position and join the armhole of the twist trill body and the armhole of the carbide blade. It is. Also, since the carbide cutting edge is joined, the strength of the drill is not necessarily satisfactory. Moreover, the extrusion process must be carried out by accurately controlling the extrusion speed and twisting speed, which is difficult in practice and has poor productivity.
上記特開昭５４−１５９７９１号の方法により超硬ソリ
ッドドリルを形成しようとしても、ガイドピンを成形品
から抜き取ることができないのでボディのみ成形し、そ
れをシャンクと接合するという方法に頼らざるを得す１
強度、生産性の点で満足でない。Even if an attempt is made to form a solid carbide drill using the method disclosed in JP-A-54-159791, the guide pin cannot be removed from the molded product, so the method of forming only the body and joining it to the shank has to be resorted to. Su1
Not satisfied with strength and productivity.
従って、本発明の目的は以上の様な問題点を解消させ従
来技術では困難であった超硬合金での袖穴付ソリッドト
リル及びその製法を提供することである。Therefore, an object of the present invention is to solve the above-mentioned problems and provide a solid trill with armholes made of cemented carbide, which has been difficult with the prior art, and a method for manufacturing the same.
本発明者は鋭意研究の結果、あらかじめ直線状の袖穴及
び溝を形成した超硬合金の丸棒を熱間で所定の断面形状
とねしれ角を有するダイスで加圧変形することにより、
螺旋状の袖穴を有するソリッドトリルを形成することが
できることを発見し、本発明を完成した。すなわち、本
発明の袖穴付ソリノ１へ１〜リルは、複数の螺旋状の刃
に沿って螺旋状に配置された袖穴を有することを特徴と
する。As a result of extensive research, the inventor of the present invention found that by hot deforming a cemented carbide round bar with linear arm holes and grooves formed therein using a die having a predetermined cross-sectional shape and helix angle,
The present invention was completed by discovering that it is possible to form a solid trill with a spiral armhole. That is, the solino with armholes 1 to 1 of the present invention is characterized by having armholes arranged spirally along a plurality of spiral blades.
また、本発明の油穴付超硬ソリッドドリルの製法は、ス
（−レートな複数本の袖穴を有する丸棒に所定の断面形
状となるようストレートな溝を複数形成し、二九を窩温
下で所定の断面形状とねじれ角を有するダイスで加圧変
形させドリルとしてのねじれ角を与えることを特徴とす
る。In addition, the manufacturing method of the solid carbide drill with an oil hole of the present invention involves forming a plurality of straight grooves to have a predetermined cross-sectional shape on a round bar having a plurality of straight sleeve holes, and It is characterized in that it is deformed under pressure with a die having a predetermined cross-sectional shape and helix angle under heat to give it a helix angle as a drill.
以下、本発明の実施例として２枚方ドリルを製造する場
合につき図面を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a case of manufacturing a two-sided drill as an embodiment of the present invention will be described with reference to the drawings.
まず第１図に示すように２本のストレートな袖穴１を有
する超硬合金素材からなる丸棒２を製作する。この丸棒
の製作にあたっては、超硬合金の粉末に可塑剤を添加し
、ペースト状としたものを押し出す。このような押し出
し成形が最も好ましいが、特に押し出し成形に限定され
るものでなく。First, as shown in FIG. 1, a round bar 2 made of a cemented carbide material and having two straight sleeve holes 1 is manufactured. To make this round bar, a plasticizer is added to cemented carbide powder and the paste is extruded. Although such extrusion molding is most preferred, it is not particularly limited to extrusion molding.
プレス体を仮焼結した後、穴加工を施したものでもよい
。次にこの押し出し体を８００°Ｃ位で仮焼結した後、
第２図に示すごとく砥石でストレートな溝３を入れ、焼
結を行なう。精度を上げるためには溝入れを焼結後に行
なってもよい。The press body may be pre-sintered and then drilled with holes. Next, after pre-sintering this extruded body at around 800°C,
As shown in FIG. 2, a straight groove 3 is made with a grindstone and sintering is performed. To increase precision, grooving may be performed after sintering.
第３図は高温での塑性変形装置の概略図である。FIG. 3 is a schematic diagram of a high temperature plastic deformation device.
４はヒータを、５はモールドを、６はダイスを示す。4 indicates a heater, 5 indicates a mold, and 6 indicates a die.
ヒータ４としては、超硬合金が容易に塑性変形する温度
まで昇温し得るものであれば何でも使用することができ
、特に高周波加熱が好ましい。As the heater 4, any heater can be used as long as it can raise the temperature to a temperature at which the cemented carbide is easily plastically deformed, and high frequency heating is particularly preferred.
モールド５は中央に２棒案内用のキャビティ７を有する
。モールド５は成形した丸棒２の取り出しを容易にする
ために２つ割りの構造とすることができるが、成形品を
回転しながら取り出す場合は一体品でもよい。モールド
５は耐熱性の観点から炭素製のものが好ましい。The mold 5 has a cavity 7 in the center for guiding two rods. The mold 5 may have a two-part structure to facilitate taking out the molded round bar 2, but it may be a single piece if the molded product is taken out while rotating. The mold 5 is preferably made of carbon from the viewpoint of heat resistance.
ダイス６は、第３図及び第４図に示すように、成形品と
対応する断面形状及びねじれ角を有するキャビティ８を
有する。後述するようにダイス６は、熱間で加圧下にて
超硬合金の成形を行なうので耐熱性及び高温強度の高い
セラミックにより形成するのが好ましい。また、潤滑性
、耐熱性の点で炭素を使用することもできる。ダイス６
は、中央部にガイド７と同程度の穴を有する土台９の上
面凹部に取り付けられている。土台９もモールド５と同
様に炭素で形成すのが好ましい。As shown in FIGS. 3 and 4, the die 6 has a cavity 8 having a cross-sectional shape and a helix angle corresponding to the molded product. As will be described later, the die 6 is preferably made of ceramic having high heat resistance and high temperature strength since the cemented carbide is formed under hot pressure. Furthermore, carbon can also be used in terms of lubricity and heat resistance. Dice 6
is attached to a recess on the upper surface of the base 9, which has a hole of the same size as the guide 7 in the center. It is preferable that the base 9 is also made of carbon like the mold 5.
次に、上記装置を用いて袖穴付ソリッドドリルの製造方
法について説明する。Next, a method for manufacturing a solid drill with armhole using the above-mentioned apparatus will be explained.
ストレートな溝３の入った焼結した丸棒２をモールド５
の案内キャビティ７内に入れ、約１１００℃〜１３００
℃の温度範囲にて矢印Ａで示すように上部より加圧する
。加圧は丸棒２の上端を単に加圧するだけでもよいが、
丸棒２を成形中回転させる時は、丸棒２の上端を適当な
冶具で保持し。A sintered round bar 2 with a straight groove 3 is molded into a mold 5.
into the guide cavity 7 of the
Pressure is applied from the top as shown by arrow A in the temperature range of °C. Pressure may be applied simply by applying pressure to the upper end of the round bar 2, but
When rotating the round bar 2 during molding, hold the upper end of the round bar 2 with a suitable jig.
冶具を下方に押圧しながら回転させる。ダイス６のキャ
ビティ８の構造は第３図及び第４図に示す通り所望のド
リルボディの断面形状を有するとともに所望のねじれ角
で螺旋状になっているので焼結体２は、所望のドリルボ
ディの形状に変形していく。変形後の外観を第５図に示
す。丸棒２はダイス成形中ずれを起こすことなく均一に
変形するので、第５図に示すように袖穴１はボディ１０
内にお゛いてきれいに螺旋状に延在する。袖穴は通常ラ
ント部内に位置しなければならないので、袖穴の位置が
ずれないことは非常に有利である。以上、本発明を実施
例を用いて説明したが、本発明は上述の実施例に限定さ
れるものではなく、各種の断面形状、例えば３枚刃以上
のものにも可能なことは当然である。Rotate the jig while pressing it downward. The structure of the cavity 8 of the die 6 has the cross-sectional shape of the desired drill body as shown in FIGS. 3 and 4, and is spiral at the desired helix angle, so that the sintered body 2 can be formed into the desired drill body. It transforms into the shape of. Figure 5 shows the appearance after deformation. Since the round bar 2 is deformed uniformly without any deviation during die molding, the sleeve hole 1 is aligned with the body 10 as shown in FIG.
It extends inside in a neat spiral shape. Since the cuff hole must normally be located within the runt, it is very advantageous that the cuff hole remains in position. Although the present invention has been described above using examples, the present invention is not limited to the above-mentioned examples, and it is of course possible to apply various cross-sectional shapes, for example, three or more blades. .
なお、本明細書において使用した用語「袖穴」は、ドリ
ル内を貫通する穴であって、いかなる種類の切削液にも
利用しうるちのを意味することを理解すべきである９
〔発明の効果〕
本発明によれば、超硬合金ソリッドドリルで複数の袖穴
を螺旋状の切刃に沿って、螺旋状の配置で正確にドリル
内を貫通したもののｘ作が可能である。かくして、出来
上がったソリッドドリルは簡単な耐摩加工で製品とする
ことができる。そして穴あけ使用時には、刃先先端まで
袖穴があるので刃先への十分な冷却やスムーズな切肩排
出が可能となり、高性能なソリッドドリルを提供するこ
とができる。It should be noted that the term "side hole" used in this specification should be understood to mean a hole that passes through a drill and that can be used with any type of cutting fluid. Effects] According to the present invention, it is possible to accurately penetrate a plurality of armholes into the drill in a spiral arrangement along the spiral cutting edge using a cemented carbide solid drill. In this way, the completed solid drill can be made into a product by simple wear-resistant processing. When used for drilling, the sleeve hole extends to the tip of the cutting edge, allowing for sufficient cooling of the cutting edge and smooth removal of the cut shoulder, making it possible to provide a high-performance solid drill.
第１（ａ）図は袖穴を有する超硬合金素材からなる丸棒
の平面図であり、第１（ｂ）図は第１（ａ）図の丸棒の
左側面図であり、第２（ａ）図は溝を形成した丸棒の平
面図であり、第２（ｂ）図は第２（ａ）図の丸棒の左側
面図であり、第３図はドリル成形用装置の断面概酩図で
あり、第４図は第３図において線分ｘ−ｘ′に沿って得
られる断面図であり、第５図は第３図の装置とにより得
られるソリッドドリルの正面図である。
１・・・袖穴 ２・・・丸棒 ３・・・溝４・
・・ヒータ ５・・・モールド
６・・・ダイス ８・・・キャビティ９・・土台
そ３）図FIG. 1(a) is a plan view of a round bar made of cemented carbide material having sleeve holes, FIG. 1(b) is a left side view of the round bar of FIG. 1(a), and FIG. (a) is a plan view of the round bar with grooves formed therein, FIG. 2(b) is a left side view of the round bar in FIG. 2(a), and FIG. 3 is a cross-sectional view of the drill forming device. FIG. 4 is a cross-sectional view taken along line segment x-x' in FIG. 3, and FIG. 5 is a front view of the solid drill obtained by the apparatus shown in FIG. 3. . 1... Sleeve hole 2... Round bar 3... Groove 4.
... Heater 5 ... Mold 6 ... Dice 8 ... Cavity 9 ... Base 3) Diagram
Claims (6)
穴を有する超硬ソリッドドリル。(1) A solid carbide drill with oil holes arranged spirally along a plurality of spiral blades.
の断面形状となるようにストレートの溝を形成した超硬
合金素材を熱間にて所定の断面形状とねじれ角を有する
ダイスで加圧変形させ、ねじれを与えることを特徴とす
る油穴付超硬ソリッドドリルの製法。(2) A cemented carbide material with straight grooves formed in a predetermined cross-sectional shape on a round bar with multiple thin straight holes is hot-processed using a die with a predetermined cross-sectional shape and helix angle. A method for producing a solid carbide drill with an oil hole that is characterized by pressure deformation and twisting.
ドリルの製法において、前記ストレートの溝を形成する
前に、前記超硬合金素材を焼結することを特徴とする製
法。(3) The method for manufacturing a solid carbide drill with an oil hole according to claim 2, characterized in that the cemented carbide material is sintered before forming the straight groove.
ドリルの製法において、前記ストレート溝を形成した後
に前記超硬合金素材を焼結することを特徴とする製法。(4) The method for manufacturing a solid carbide drill with an oil hole according to claim 2, characterized in that the cemented carbide material is sintered after the straight groove is formed.
載の油穴付超硬ソリッドドリルの製法において、前記ダ
イスはセラミックス製であることを特徴とする製法。(5) A method for manufacturing a solid carbide drill with an oil hole according to any one of claims 2 to 4, wherein the die is made of ceramics.
載の油穴付超硬ソリッドドリルの製法において、前記油
穴付丸棒を押し出しにより形成することを特徴とする製
法。(6) A method for manufacturing a solid carbide drill with an oil hole according to any one of claims 2 to 5, characterized in that the round bar with an oil hole is formed by extrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16717385A JPS6228105A (en) | 1985-07-29 | 1985-07-29 | Cemented carbide solid drill and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16717385A JPS6228105A (en) | 1985-07-29 | 1985-07-29 | Cemented carbide solid drill and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6228105A true JPS6228105A (en) | 1987-02-06 |
| JPH0471642B2 JPH0471642B2 (en) | 1992-11-16 |
Family
ID=15844770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16717385A Granted JPS6228105A (en) | 1985-07-29 | 1985-07-29 | Cemented carbide solid drill and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6228105A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7311479B2 (en) * | 2003-06-04 | 2007-12-25 | Seco Tools Ab | Rotatable tool and a blank |
| JP2008087088A (en) * | 2006-09-29 | 2008-04-17 | Denso Corp | Cutting tool and manufacturing method of the same |
-
1985
- 1985-07-29 JP JP16717385A patent/JPS6228105A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7311479B2 (en) * | 2003-06-04 | 2007-12-25 | Seco Tools Ab | Rotatable tool and a blank |
| JP2008087088A (en) * | 2006-09-29 | 2008-04-17 | Denso Corp | Cutting tool and manufacturing method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0471642B2 (en) | 1992-11-16 |
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