JPS6080510A - Soldered cutting tool - Google Patents

Abstract

PURPOSE:To improve soldering strength by forming connection end faces between an edge member and a shank member into surfaces perpendicular to the axis of a tool, providing key ways in the end faces and soldering both members including the key surfaces to transmit cutting torque with a key. CONSTITUTION:A shank member 2 made of high speed steel or the like is formed with an end face perpendicular to the axis and having a key way 3 provided. Also, an edge member (not shown) made of sintered hard alloy or the like is provided in the same position as the above with a key way to be soldered to said shank member with silver solder or the like sandwiching copper plate. A key 4 may be at the same time soldered, while it may be soldered previously to the key way 3 in either the edge member 1 or shank member 2 to ease the operation. Further, when the solder is fused while a light torsional torque is applied in the direction of cutting torque in the soldering, the torque transmitting strength is improved.

Description

【発明の詳細な説明】 この発明は、刃部材と柄部材をそれぞれ超硬合金と合金
鋼あるいは高速度工具鋼と合金鋼というふうに異種材料
製とし、これをろう接ぎによって接合したドリル、リー
マなどの切削工具に関する０ これらのろう接ぎ切削工具は高価な刃部材を節約し、工
具コストを引き下げるため有効であるがしかし切削中に
工具が受ける大きな切削トルクに　。Detailed Description of the Invention The present invention provides drills and reamers in which the blade member and handle member are made of different materials such as cemented carbide and alloy steel, or high-speed tool steel and alloy steel, and these are joined by brazing. Regarding cutting tools such as 0. These brazing cutting tools are effective in saving expensive blade members and lowering tool costs, but due to the large cutting torques that the tool is subjected to during cutting.

耐えるには軸に直角な単純な平面でろう付けすると加工
が容易で製作コストは下けられる利点はあるが、著しい
強度不足を生じるという欠点も避けることかできない。For durability, brazing on a simple plane perpendicular to the axis has the advantage of being easier to process and lowering manufacturing costs, but it also has the disadvantage of significantly lacking strength.

そこで、ろう伺は強度改善のため、第１図の概略図に示
すように、刃部４Ｊ１１１と柄部材（２）のいずれか一
方にＶ形凹状切欠き（５）を設け、これに対応してかみ
合うように他方にＶ形凸部（６）を設け、これらをかみ
合せてろうイ」けにより接合した。また、図示しないが
一方の部材に凹状円錐面を、他方の部材に凸状の円錐１
ｎ」を形成し、両日錐面を組合せて、凹凸の端面でろう
イ」け接合もった工具である。Therefore, in order to improve the strength of the brazing machine, a V-shaped concave notch (5) is provided on either the blade part 4J111 or the handle member (2), as shown in the schematic diagram in Figure 1. A V-shaped protrusion (6) was provided on the other side so as to engage with each other, and these were engaged and joined by soldering. Although not shown, one member may have a concave conical surface, and the other member may have a convex conical surface.
This is a tool with a concave and convex end surface that forms a "n" shape, combines both conical surfaces, and has a brazing joint on the uneven end surface.

かくして円錐形状やＶ形状のため阜刃部拐（１）と柄部
材（２）のろう伺は接着面が切削トルクに耐えるように
なり、さらに加えて、■形かみ合せなどによって機構的
に強度が向上された。しかし、これら従来品は刃部材柄
部材のそれぞれの端面に凹Ｖ形切欠きと、凸Ｖ形、また
は凹円錐と凸円錐に加工しなければならず、加工困難と
コスト高になった。しかも、凹凸の両部材端間の加工梢
厩（例えはＶ形の角度などすが高いことが必要である。In this way, due to the conical or V-shape, the adhesive surfaces of the blade part (1) and the handle member (2) can withstand cutting torque, and in addition, the mechanical strength is increased by the interlocking of the shapes. has been improved. However, in these conventional products, each end face of the blade handle member must be machined to have a concave V-shaped notch, a convex V-shape, or a concave cone and a convex cone, making machining difficult and increasing costs. Moreover, it is necessary that the processed height (for example, a V-shaped angle) between the ends of the two uneven members be high.

これが悪くなると、両部材がかみ合されろう付けされた
際すき間が不均一となる。恨言すればろう材の厚みに不
均一が生じ、ろう付は強度の１氏いものが作られること
になった。いずれにせよ切削トルクをろう材の接廃面だ
けで受けさせると強度不足が避けられないという欠点が
あった。If this worsens, the gaps will become uneven when both members are engaged and brazed. Unfortunately, the thickness of the brazing material was uneven, and the brazing strength was poor. In any case, if the cutting torque is applied only to the contact surface of the filler metal, there is a drawback that insufficient strength is inevitable.

本発明はこれらの不都合を解決するため刃部材と柄部材
のろう付は接合面に１−ｊたは複数個のキーを用い、切
削トルクはこのキーによって伝達させるような構造にし
たものである。以下図面によって本発明の詳細な説明す
る。第２図ａ、ｂ、ｃはいずれもろう付は接合ドリルの
実施例を示す。刃部材（１）は例えば超硬合金製で柄部
口（２）は高速度工具鋼製である。第２図では、この柄
部材（２）の端面端面も柄部材（２）に対応して同位置
にキーを受け人動 れる凹溝（３）（以下キー溝と称する）を設けである。In order to solve these inconveniences, the present invention has a structure in which the blade member and handle member are brazed using 1-j or a plurality of keys on the joint surface, and the cutting torque is transmitted by the keys. . The present invention will be explained in detail below with reference to the drawings. Figures 2a, b, and c all show examples of brazed joint drills. The blade member (1) is made of cemented carbide, for example, and the handle opening (2) is made of high-speed tool steel. In FIG. 2, the end face of the handle member (2) is also provided with a recessed groove (3) (hereinafter referred to as a key groove) at the same position corresponding to the handle member (2), through which a key can be received and moved.

このようにして刃部材（１）と柄部材（２）は各端面に
設けられたキーみぞ（３）に第３図に示す共通のキー（
４）を介してろう付は接合される。キー（４）の形状は
、第２図（ａ）　（ｂ）に対しては第３図の（ａｌのタ
イプが、また、第２図（Ｃ）に対しては第３図（ｂ）の
タイプが２ケ所に組み込まれる。キーみぞ（３）の形状
を矩形断面にすることもでき、その場合は第３図（Ｃ１
のようなタイプのキー（４）が用いられる。In this way, the blade member (1) and handle member (2) are inserted into the key groove (3) provided on each end face with the common key (
4) The soldering is performed via brazing. The shape of the key (4) is the type (al) in Figure 3 for Figures 2(a) and (b), and the type (al) in Figure 3(b) for Figure 2(C). The type is incorporated in two places.The shape of the key groove (3) can also be made into a rectangular cross section, in which case the key groove (3)
A type of key (4) is used.

ろう付は接合の作業については、従来の方法とまったく
同じで銅板サンドウィッチの銀ろう付けなどを用いてよ
い。キー（４）は同時ろう付けしてもよいが、あらかじ
め刃部材（１）、または柄部口（２）のいずれか一方の
キーみぞ（３）にろう付けしておくと作業がやり易い。As for brazing, the joining process is exactly the same as the conventional method, such as silver brazing of a copper plate sandwich. The key (4) may be brazed at the same time, but the work will be easier if the key (4) is brazed in advance to the key groove (3) on either the blade member (1) or the handle opening (2).

また、ろう付けの際に、その切削工具が受ける切削トル
クの方向に、軽く捩りのトルクを加えながらろう材を溶
融させると刃部材（１）と柄部材（２）がキー（４）を
介してそれぞれのキーみぞ（３〕の受圧面で接触し、接
合後の実際の切削において切１’ｌ１１　）ルクをキー
（４）に伝達しろう付は面そのもののトルク伝達強度よ
りもはるかに強い結果が得られた。実験結果の一例を示
すと、φ１０超硬ろう接ぎドリルでは、第１図に示した
Ｖ形および円錐接合のものでねじり破壊トルクは２００
〜１５０しなかった。なおサンドウィンチ銅板はキーみ
ぞ（３）内でその有無にかかわらず破壊トルクに差はみ
られなかった。Also, when brazing, if the brazing metal is melted while applying a slight twisting torque in the direction of the cutting torque that the cutting tool receives, the blade member (1) and handle member (2) will be connected through the key (4). The pressure-receiving surface of each key groove (3) contacts each other, and in the actual cutting after joining, the cutting torque is transmitted to the key (4), and the brazing is much stronger than the torque transmission strength of the surface itself. The results were obtained. An example of the experimental results is that for a φ10 carbide soldered drill, the torsional breaking torque is 200 for the V-shaped and conical joint shown in Figure 1.
It wasn't ~150. In addition, no difference was observed in the fracture torque of the sand winch copper plate within the key groove (3) regardless of its presence or absence.

適用寸法について述べると、第２図（ａ）は外径の比較
的小さいものや油穴付きドリルなどに諧）　、　（Ｃ）
は外径の比較的大きなものや、高剛性ドリルなどに適用
される。Regarding applicable dimensions, Fig. 2 (a) is suitable for those with relatively small outer diameters and drills with oil holes, etc.), (C)
is applied to drills with relatively large outer diameters and high rigidity.

この発明は、上述のように刃部材と柄部材の接合端面を
工具の軸に直角な面に形成すると共に、該端面にキー溝
を設け、該溝にキーを挿入してキー表面を含み両部材を
ろう付けしたので、両部材の接合端面の加工と両部材の
ろう付は作業がきわめて容易となった。しかも、加工精
度が高いのでろう材の厚みが均一となシろう付は強度が
高くなシ、キーの耐切削トルク性能と相俟ちきわめて強
度の大きなろう接ぎ切削工具を実現した。In this invention, as described above, the joining end surface of the blade member and the handle member is formed into a surface perpendicular to the axis of the tool, and a key groove is provided on the end surface, and a key is inserted into the groove so that both sides including the key surface are formed. Since the members were brazed, processing the joint end faces of both members and brazing the two members became extremely easy. Furthermore, due to the high machining accuracy, brazed brazing with a uniform thickness of the brazing material has high strength, and this combined with the key's cutting torque resistance has resulted in an extremely strong brazed cutting tool.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来品の接合状態を示す概略図、第視図である
。 １・・・・・・刃部材 ２・・・・・柄部口 ３・・・・・・キー溝 ４・・・・・キー 代理人　弁理士　河　内　潤　二 第３図FIG. 1 is a schematic diagram and a perspective view showing the bonded state of a conventional product. 1...Blade member 2...Handle opening 3...Keyway 4...Key agent Patent attorney Jun Kawachi 2Figure 3

Claims (1)

【特許請求の範囲】[Claims] （１）刃部材と柄部材とを異種材料により形成し、両部
材をろう接ぎした切削工具において、両部材の接合端面
を工具の軸に直角な面に形成すると共に該端面にキー溝
を設け、該溝にキーを挿入してキー表面を含み両部材を
ろう付けしたろう接ぎ切削工具。 （２〕前記ろう付けは、切削トルクのかかる方向に軽い
捩りトルクを作用させて行う特許請求の範囲第１項記載
のろう接ぎ切削工具。(1) In a cutting tool in which a blade member and a handle member are made of different materials and both members are brazed together, the joining end surfaces of both members are formed into a surface perpendicular to the axis of the tool, and a key groove is provided in the end surface. , a brazing cutting tool in which a key is inserted into the groove and both parts including the key surface are brazed. (2) The brazing cutting tool according to claim 1, wherein the brazing is performed by applying a light torsional torque in the direction in which the cutting torque is applied.