JPH0790470B2 - Manufacturing method of drive bit for driving machine - Google Patents
Manufacturing method of drive bit for driving machineInfo
- Publication number
- JPH0790470B2 JPH0790470B2 JP1247715A JP24771589A JPH0790470B2 JP H0790470 B2 JPH0790470 B2 JP H0790470B2 JP 1247715 A JP1247715 A JP 1247715A JP 24771589 A JP24771589 A JP 24771589A JP H0790470 B2 JPH0790470 B2 JP H0790470B2
- Authority
- JP
- Japan
- Prior art keywords
- drive bit
- tip
- manufacturing
- bit
- driving machine
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/02—Percussive tool bits
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は釘打機等の打込機用ドライブビットの製造法に
関するもので、ドライブビットの耐摩耗性を向上させる
ようにしたものである。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a drive bit for a driving machine such as a nail driving machine, which is intended to improve the wear resistance of the drive bit. .
打込機用ドライブビットは、ガスまたは圧縮空気等によ
って駆動されるピストンに固着され、ピストンと共に駆
動されて釘やステープル等の止具を木材や石膏ボード等
に打込むものである。The drive bit for a driving machine is fixed to a piston driven by gas, compressed air, or the like, and is driven together with the piston to drive fasteners such as nails and staples into wood, gypsum board, or the like.
かかるドライブビットにおいて、ビット先端と止具の打
撃接触は避けられない。このためビット先端は使用時間
と共に必然的に摩耗し、著しい場合には打込み品質及び
作業性の低下を招いていた。このことから、耐摩耗性に
優れたドライブビットの開発が望まれていた。また、木
材等を介して鉄板を打撃することにより、止具の先端を
曲げ再び木材へ打込ませるクリンチ作業においては、ド
ライブビットに著しい打込み反力が作用するためドライ
ブビット先端に欠けを生じ易い。In such a drive bit, hitting contact between the bit tip and the stopper is unavoidable. For this reason, the tip of the bit inevitably wears over the time of use, and in a remarkable case, the driving quality and workability are deteriorated. Therefore, it has been desired to develop a drive bit having excellent wear resistance. Also, in the clinching work in which the tip of the stopper is bent and hammered into the wood again by striking the iron plate through the wood etc., the drive bit tip is likely to be chipped because a significant driving reaction force acts on the drive bit. .
このため、耐摩耗性に優れ、かつ曲りにくいと共に折損
しにくいドライブビットの開発が強く望まれていた。Therefore, there has been a strong demand for the development of a drive bit which is excellent in wear resistance, hard to bend, and hard to break.
本発明の目的は、上記した従来技術の欠点をなくし、ド
ライブビット全体の靱性向上と先端部の耐摩耗性向上を
図るようにしたドライブビットの製造法を提供すること
である。It is an object of the present invention to provide a method of manufacturing a drive bit, which eliminates the above-mentioned drawbacks of the prior art and improves the toughness of the entire drive bit and the wear resistance of the tip.
本発明は、0.4〜2.2％のの炭素を含む鉄または鉄系合金
からなる鋼材で形成すると共に全体を焼入れ焼戻し等の
熱処理によって、ビッカース硬さ400〜750に調質した
後、先端のみを１秒以下で焼入れすることにより、調質
部と焼入部の間の軟化部を2mm以下として全体の靱性向
上と先端部の耐摩耗性向上を図るようにしたものであ
る。The present invention is formed of a steel material made of iron or an iron-based alloy containing 0.4 to 2.2% of carbon, and the whole is heat treated such as quenching and tempering to obtain Vickers hardness of 400 to 750, and then only the tip is 1 By quenching in seconds or less, the softened portion between the tempered portion and the quenched portion is set to 2 mm or less to improve overall toughness and wear resistance of the tip portion.
以下本発明を実施例図面を参照して説明する。第１図は
ドライブビット１の全体構成を示し、該ドライブビット
１は、周知の如く、本体部２、止具打込用先端部３及び
ピストン取付端５からなり、0.4〜2.2％のの炭素を含む
鉄または鉄系合金からなる鋼材により形成される。本体
部２は焼入れ焼戻し等の熱処理によりビッカース硬さ40
0〜750に調質され、先端部３は１〜30MHzの高周波、レ
ーザまたは電子ビーム加熱により焼入れされてビッカー
ス硬さ750〜1100の硬質部とされる。なお４は先端部３
を硬質部とする際に高温焼戻しされて軟質となった軟化
部である。The present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the overall structure of the drive bit 1. The drive bit 1 is composed of a main body portion 2, a stopper driving tip portion 3 and a piston mounting end 5 as is well known, and contains 0.4 to 2.2% carbon. It is formed of a steel material made of iron or an iron-based alloy containing. The main body 2 has a Vickers hardness of 40 by heat treatment such as quenching and tempering.
The tip portion 3 is tempered by high frequency of 1 to 30 MHz, laser or electron beam heating to be a hard portion having Vickers hardness of 750 to 1100. 4 is the tip 3
Is a softened part that has been softened by high temperature tempering when forming a hard part.
ドライブビット１を形成する鉄系材料の炭素量を0.4〜
2.2％としたのは、0.4％以下では先端部３の耐摩耗性向
上のために必要な硬さが得られないためであり、2.2％
以下としたのは、これ以上では硬さの上昇が期待でき
ず、また耐折損性を損うためである。The carbon content of the iron-based material forming drive bit 1 is 0.4 to
The reason why 2.2% is set is that if 0.4% or less, the hardness necessary for improving the wear resistance of the tip portion 3 cannot be obtained, and 2.2% is set.
The reason for setting below is that the hardness cannot be expected to increase further and the breakage resistance is impaired.
次に、全体の硬さをビッカース硬さ400〜750としたの
は、ビッカース硬さ400以下ではドライブビット１のく
り返し打撃により塑性変形が生じ易く使用に耐えにくく
なるためであり、またビッカース硬さ750以上では靱性
が低下し、使用時に発生した傷やドライブビット１の肉
厚変化部等を起点として割れが発生し易いためである。Next, the overall hardness is set to Vickers hardness of 400 to 750 because if the Vickers hardness is 400 or less, plastic deformation easily occurs due to repeated impact of the drive bit 1 and it becomes difficult to withstand use. This is because when the hardness is 750 or more, the toughness is lowered, and cracks are likely to occur from scratches generated during use, a portion where the wall thickness of the drive bit 1 changes, and the like.
先端部３の焼入硬さをビッカース硬さ750〜1100とした
理由は、ビッカース硬さ750以下では、従来、市販され
ているドライブビット同様耐摩耗性が乏しいためであ
り、ビッカース硬さ1100以下としたのは本発明において
推奨する鉄または鉄系合金材の範囲で、後述する処理法
によって得られる最高硬さがビッカース硬さ1100となる
ためである。The reason why the quenching hardness of the tip portion 3 is set to Vickers hardness of 750 to 1100 is that the Vickers hardness of 750 or less is poor in wear resistance like the drive bits that have been commercially available in the past, and the Vickers hardness of 1100 or less. The reason is that the maximum hardness obtained by the treatment method described later becomes Vickers hardness 1100 in the range of iron or iron-based alloy material recommended in the present invention.
前記先端部３の範囲を１〜4mmとしたのは、打込機本体
の構造によっても異なるが、通常ドライブビット１の先
端部３より10〜15mmの部分に、曲げ応力の作用する点が
あり、この部位と先端部３を焼入れした際に生じる軟化
部４が重なることを避けることが望ましいこと、また1m
m以下では、使用時の打撃により先端部３に割れが発生
し易いと共に先端部３が摩耗して消失してしまうと摩耗
が急速に進展すること等の理由からである。Although the range of the tip portion 3 is set to 1 to 4 mm, it depends on the structure of the driving machine main body, but there is a point that bending stress acts on the portion 10 to 15 mm from the tip portion 3 of the drive bit 1 normally. , It is desirable to avoid overlapping of this part and the softened part 4 that occurs when the tip part 3 is quenched, and 1m
This is because when the length is m or less, the tip portion 3 is likely to be cracked by the impact during use, and when the tip portion 3 is worn and disappears, the wear rapidly progresses.
次に先端部３の硬化法として、周波数１〜30MHzの超高
周波数装置、レーザまたは電子ビームを用いた理由は、
焼入時に生じる軟化部４を2mm以下とするためには加熱
時間を１秒以下にする必要があり、この時間内で焼入れ
に必要な温度を得る手段としてこれらの手法が最適であ
るためである。なお、軟化部４は2mm以下ではこの部位
より曲りが発生し易く、できる限り少ないことが望まし
い。Next, the reason for using an ultrahigh frequency device having a frequency of 1 to 30 MHz, a laser or an electron beam as a hardening method for the tip portion 3 is as follows.
This is because it is necessary to set the heating time to 1 second or less in order to reduce the softened portion 4 generated during quenching to 2 mm or less, and these methods are optimal as means for obtaining the temperature required for quenching within this time. . If the softened portion 4 is 2 mm or less, bending tends to occur from this portion, and it is desirable that the softened portion 4 be as small as possible.
以上述べたいくつかの要因の中で最適と考え推奨する条
件は、材質:0.5〜0.8％の炭素を含む鉄系合金材料、本
体部２の硬さ：ビッカース硬さ500〜600、先端部３の硬
さ：ビッカース硬さ900〜1000である。また、この場合
の先端部３の硬さを得るための条件としては、ドライブ
ビット１の形状、質量にもよるが、３〜13MHzの高周波
装置により出力５〜7Kwで0.2〜0.5秒の加熱が望まし
い。Among the several factors mentioned above, the optimum conditions are recommended: Material: iron-based alloy material containing 0.5 to 0.8% carbon, hardness of main body 2: Vickers hardness 500 to 600, tip 3 Hardness: Vickers hardness is 900-1000. The condition for obtaining the hardness of the tip portion 3 in this case depends on the shape and mass of the drive bit 1, but a high frequency device of 3 to 13 MHz can heat the output for 5 to 7 Kw for 0.2 to 0.5 seconds. desirable.
第３図に本発明によって製造されたドライブビットと市
販ドライブビットを用い、屋根用仕上げ材として使用さ
れているアスファルトシングル材へのステープラ打込み
試験を行った場合の先端部３の摩耗量の比較を示す。本
発明製造法に従って製造されたドライブビットは、従来
の市販ドライブビットに比較し約５倍の摩耗寿命が得ら
れた。FIG. 3 shows a comparison of the wear amount of the tip portion 3 when a stapler driving test is performed on an asphalt single material used as a roof finishing material by using the drive bit manufactured according to the present invention and a commercially available drive bit. Show. The drive bit manufactured according to the manufacturing method of the present invention has about 5 times the wear life as compared with the conventional commercial drive bit.
また、38mmのステープラを用い、30mmのベニア合板の下
に鉄板を敷き、クリンチ打込みを行った結果では、第４
図に示すように、従来の市販ドライブビットは、先端部
３より10〜15mmの範囲で曲がりが発生し作動しなくなる
ものが８本中３本に認められたが、本発明製造法に従っ
て製造されたドライブビットでは何等問題は認められな
かった。Also, using a 38 mm stapler, laying an iron plate under the 30 mm veneer plywood, and performing clinching,
As shown in the figure, in the conventional commercially available drive bit, bending out of 10 to 15 mm from the tip portion 3 occurred and it became inoperable in 3 out of 8, but it was manufactured according to the manufacturing method of the present invention. There was no problem with the drive bit.
以上のように本発明によれば、クリンチ作業においても
曲がりや折損の発生がなく、かつ従来のドライブビット
に比較し数倍の耐摩耗性を有する長寿命のドライブビッ
トを提供できるようになる。As described above, according to the present invention, it is possible to provide a long-life drive bit that does not bend or break even during clinch work and has several times the wear resistance as compared with a conventional drive bit.
第１図は本発明製造法に従って製造されたドライブビッ
トの一実施例を示す平面図及び側面図、第２図は本発明
及び従来のドライブビットの硬さ分布比較図、第３図は
本発明及び従来のドライブビットのステープラ打込数に
対する摩耗量の比較グラフ、第４図は本発明及び従来の
ドライブビットのクリンチ打込を行った際の先端の曲が
りを示す断面図である。 図において、１はドライブビット、２は本体部、３は先
端部、４は軟化部、５はピストン取付端である。FIG. 1 is a plan view and a side view showing an embodiment of a drive bit manufactured according to the manufacturing method of the present invention, FIG. 2 is a hardness distribution comparison diagram of the present invention and a conventional drive bit, and FIG. 3 is the present invention. FIG. 4 is a comparative graph of the wear amount with respect to the number of driven staplers of the conventional drive bit, and FIG. 4 is a sectional view showing the bending of the tip when the drive bit of the present invention and the conventional drive bit is clinched. In the figure, 1 is a drive bit, 2 is a body part, 3 is a tip part, 4 is a softening part, and 5 is a piston mounting end.
Claims (2)
なる鋼材により形成した打込機用ドライブビットであっ
て、 全体を調質した後、先端部分のみを１〜30MHzの高周
波、レーザ、または電子ビームを用い、１秒以下の加熱
時間で焼入れし、かつ焼入れによって生じる調質部分と
焼入部分の間の軟化部の幅を2mm以下としたことを特徴
とする打込機用ドライブビットの製造法。1. A drive bit for a driving machine, which is formed of steel having a carbon content of 0.4 to 2.2% and made of iron or an iron-based alloy, and after the whole is tempered, only the tip portion has a high frequency of 1 to 30 MHz, Using a laser or an electron beam, quenching for a heating time of 1 second or less, and the width of the softened portion between the tempered portion and the quenching portion caused by quenching is set to 2 mm or less Drive bit manufacturing method.
硬さを400〜750及び焼入れした先端部のビッカース硬さ
を750〜1100とし、かつ先端部の焼入れ範囲をビット先
端より１〜4mmとしたことを特徴とする請求項１記載の
打込機用ドライブビットの製造法。2. The tempered main body has a Vickers hardness of 400 to 750 and the hardened tip has a Vickers hardness of 750 to 1100, and the hardened range of the tip is 1 to 4 mm from the tip of the bit. The method for manufacturing a drive bit for a driving machine according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1247715A JPH0790470B2 (en) | 1989-09-22 | 1989-09-22 | Manufacturing method of drive bit for driving machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1247715A JPH0790470B2 (en) | 1989-09-22 | 1989-09-22 | Manufacturing method of drive bit for driving machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03111180A JPH03111180A (en) | 1991-05-10 |
| JPH0790470B2 true JPH0790470B2 (en) | 1995-10-04 |
Family
ID=17167593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1247715A Expired - Fee Related JPH0790470B2 (en) | 1989-09-22 | 1989-09-22 | Manufacturing method of drive bit for driving machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0790470B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009132079A3 (en) * | 2008-04-23 | 2010-01-07 | Longyear Tm, Inc. | Bi-steel percussive drill rod |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0640049A (en) * | 1992-03-02 | 1994-02-15 | Seikosha Co Ltd | Printing wire brazing structure and its brazing method |
-
1989
- 1989-09-22 JP JP1247715A patent/JPH0790470B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009132079A3 (en) * | 2008-04-23 | 2010-01-07 | Longyear Tm, Inc. | Bi-steel percussive drill rod |
| US7900719B2 (en) | 2008-04-23 | 2011-03-08 | Longyear Tm, Inc. | Bi-steel percussive drill rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03111180A (en) | 1991-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |