JPS5877435A - Drill grinding machine - Google Patents
Drill grinding machineInfo
- Publication number
- JPS5877435A JPS5877435A JP17597081A JP17597081A JPS5877435A JP S5877435 A JPS5877435 A JP S5877435A JP 17597081 A JP17597081 A JP 17597081A JP 17597081 A JP17597081 A JP 17597081A JP S5877435 A JPS5877435 A JP S5877435A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- grinding
- ground
- grindstones
- grindstone
- 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.)
- Pending
Links
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
- B24B3/26—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は２枚の砥石を用いて研削するドリル研削盤に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drill grinding machine that performs grinding using two grindstones.
通常のドリル研削盤は１枚の砥石によってドリルの先端
の切刃を研削しており、ドリル又は砥石の一方に首振り
運動を与えて主切れ刃につづく主逃げ面を形成させてい
たが、自動でこの運動を行なわせるためには複雑な機構
を必要とし部品点数が多くなってコスト高となることを
まぬがれなかった〇
従って本発明は上記に鑑みなされたもので構造を簡単に
すべく種★検討がなされた結果被研削ドリルを軸方に送
りながら１００°前後回転させるのみで所要の研削が完
了する研削盤を創作する目的を達成することができたも
のである。A normal drill grinder uses a single grindstone to grind the cutting edge at the tip of the drill, and gives an oscillating motion to either the drill or the grindstone to form the main flank that follows the main cutting edge. In order to perform this movement automatically, a complicated mechanism is required, which increases the number of parts and increases the cost. Therefore, the present invention was created in view of the above, and a variety of types were developed to simplify the structure. ★As a result of the study, we were able to achieve the objective of creating a grinding machine that can complete the required grinding by simply rotating the drill to be ground by 100° while feeding it in the axial direction.
本発明の要旨は同方向に回転する２個の同形の砥石を互
の研削面端が極く僅かに間隔をあけ対称で且互の研削面
でなす角が被研削ドリルの先端角に等しい角度となるよ
うに２個の砥石軸心を同一平面内で平行又は傾斜して配
置し、前記平面内で被研削ドリルを砥石の対称軸上に案
内する部材を設けたことを特徴とするものである。The gist of the present invention is to use two grinding wheels of the same shape that rotate in the same direction, the edges of their grinding surfaces are symmetrical with a very slight distance between them, and the angle formed by the grinding surfaces is equal to the tip angle of the drill to be ground. The axes of the two grinding wheels are arranged in parallel or inclined in the same plane so that be.
以下本発明の第１実施例を＃！ＩＩＩ内至第２Ｉ！ｉに
もとづき説明する・ 筐体１の天板２に２個の砥石軸筒
３が僑直に所定距離隔て一平行に配設固定されている。The first embodiment of the present invention is described below! III to 2nd I! The explanation will be based on i. Two grindstone shaft cylinders 3 are directly arranged and fixed in parallel on the top plate 2 of the housing 1 at a predetermined distance apart.
該砥石軸筒３は下端にプーリ４を又天板２より突出し
た上端に砥石５を固定した砥石軸６が回転可能に軸承さ
れている。 そして２個の該砥石はドレッシングを省略
できるボラゾン若しくはダイヤモンド砥石が用いられ同
形の平板状で研削面は外周の一部を斜めと゛した等しい
円錐台の円錐面５ａで形成され、両砥石は対称に配され
るとともに円錐面５＆の砥石軸心を含む平面上の研削面
の交角は被研削ドリルの先端角に等しくなるような円錐
角を有している。 又砥石の直径は、砥石軸間距離より
極く儀か小さいものが使用され研削両端間隔が０．１〜
ｏ、 ｓ’１ｍ１ｍ好ましくはＱ、２ｍＷ′となる寸法
に作られたものを用いる。 なお砥石材質は必ずしも前
記に限定されるものではない。The whetstone shaft cylinder 3 has a pulley 4 at its lower end, and a whetstone shaft 6 on which a whetstone 5 is fixed at its upper end, which protrudes from the top plate 2, is rotatably supported. The two grinding wheels are Borazon or diamond grinding wheels that can omit dressing, and are of the same flat plate shape, and the grinding surfaces are formed by conical surfaces 5a of the same truncated cone with a part of the outer periphery diagonally bent, and both grinding wheels are symmetrical. The intersection angle of the grinding surface on the plane containing the grinding wheel axis of the conical surface 5& has a conical angle equal to the tip angle of the drill to be ground. Also, the diameter of the grinding wheel is much smaller than the distance between the grinding wheel axes, and the distance between both ends of the grinding wheel is 0.1~
o, s' 1 m 1 m, preferably Q, 2 mW' is used. Note that the material of the grindstone is not necessarily limited to the above.
筐体１には砥石軸６．６と平行な回転軸を有して２個の
砥石軸間を底辺とする２等辺三角形の頂点の位置にモー
タ７が固着されている。 該モータ７の回転軸の下端に
はプーリ８が固着されていてプーリ４との間に平ベルト
９が掛けられ、砥石軸６．６は同方向に必要な回転数で
駆動される。A motor 7 is fixed to the casing 1 at the apex of an isosceles triangle having a rotation axis parallel to the grindstone shafts 6.6 and whose base is between the two grindstone shafts. A pulley 8 is fixed to the lower end of the rotating shaft of the motor 7, and a flat belt 9 is hung between the pulley 8 and the pulley 4, and the grindstone shaft 6.6 is driven in the same direction at a required number of rotations.
天板２にはブラケット１０が砥石５．５をまたいで固着
されており、砥石軸心を含む平面上で且砥石軸間の２等
分線即ち対称軸上に被研削ドリルを挿通する穴１１＆を
有する治具１１が取替え可能に設けられている。 又必
要により治具に替えチャックとしてチゼル角度旋回させ
る手段を付加するものである。A bracket 10 is fixed to the top plate 2 across the grindstone 5.5, and a hole 11 through which the drill to be ground is inserted is formed on a plane including the grindstone axis and on the bisector between the grindstone axes, that is, on the axis of symmetry. A replaceable jig 11 is provided. Also, if necessary, means for rotating the chisel angle may be added as a chuck in place of the jig.
このように構成された本発明のドリル研削盤で研削する
には治具１１の穴１１＆がドリル径に合ったものに取替
えモータ７を駆動して砥石５，５を回転させたあとドリ
ルを治具１１の穴１１＆に挿入し軸方向に送り先端が研
削面５ａ、５ｍに接触する時点からドリルを半回転以下
９０°〜１５０°の範囲内でチーＶ＃角分旋關させる。To perform grinding with the drill grinder of the present invention configured as described above, the hole 11& of the jig 11 must be replaced with one that matches the diameter of the drill, the motor 7 must be driven to rotate the grinding wheels 5, and the drill must be fixed. The drill is inserted into the hole 11& of the tool 11, and from the time when the tip of the feed contacts the grinding surfaces 5a and 5m in the axial direction, the drill is rotated by half a turn or less within the range of 90° to 150°.
ドリルは砥石で主切れ刃が研削形成されたあと主逃
げ面が研削され同時に両研削両端でシンニングも行なわ
れる。After the main cutting edge of the drill is ground with a grindstone, the main flank is ground, and at the same time, thinning is performed at both ends of the grinding process.
２個の砥石の研削面端は０．２の隙間があるためドリル
先端のチゼルエツジが形成される。 この隙間が零にな
るとチゼルエツジが消失してしまうのでこの間隙はチゼ
ルエツジ形成に重要な働きを有している。Since there is a gap of 0.2 between the edges of the grinding surfaces of the two grindstones, a chisel edge at the tip of the drill is formed. If this gap becomes zero, the chisel edge will disappear, so this gap plays an important role in forming the chisel edge.
次に第２の実施例を第１ＩＩに示す。 この実施例は平
砥石の研削面を８錘面とせず外周の円筒面となしたもの
であって、砥石軸心を同一平面内にてドリル先端角と等
しい角度でドリルと反対側で交差させたもので、ベル）
の方向を途中で変換するカウンタ１−りが設けられてい
る。 この場合は砥石に特肩な成形を要せず研削面の各
部の周速が等しい利点がある。Next, a second embodiment is shown in Section 1II. In this embodiment, the grinding surface of the flat whetstone is not an 8-pointed surface, but a cylindrical surface on the outer periphery, and the axes of the whetstone are crossed on the opposite side from the drill at an angle equal to the drill tip angle in the same plane. Bell)
A counter is provided to change the direction of the image midway. In this case, there is an advantage that no special shaping of the grindstone is required and the circumferential speed of each part of the grinding surface is equal.
次に第３の実施例を第４図に示す。 この実施例は研削
面な砥石の側両外縁近くに形成したもので、砥石軸心は
同じ平面上でドリル先端角と同じ角度でドリル側で交差
させたものである。Next, a third embodiment is shown in FIG. In this embodiment, the grinding surface is formed near the outer edges of both sides of the grindstone, and the grindstone axes intersect on the drill side at the same angle as the drill tip angle on the same plane.
以上詳述したように本発明は２個の等しい形状の砥石の
研削面端を備かに隔間をあけて対称に配し砥石軸心を含
む平面上での研削面の交角が被研削ドリルの先端角と等
しくなるように砥石軸心を同一平面上に設け、被研削ド
リルを砥石の対称軸上で送る案内手段を設けたから砥石
又はドリルの複軸な運動機構を一切必要とせず、研削盤
の構造が極めて単純となり大巾のコストダウンができる
とともに、ドリルを送りながら旋回させるのみで、主切
れ刃研削につづいて主逃げ面更にシンニングが簡単に成
形される。 而も２個の砥石が容易に対称につくられる
のでチゼルエツジのかたより、リツプハイシの不揃いが
少くドリルの研削精度が高いため良好な切れ味が得られ
穴精度がよく、加工物によってはり−マ仕上げを不要と
することができる。 又研削面端に隙間をもたせたので
正確なチゼルエツジ並びにシンニングを簡単に成形する
ことができ切削抵抗が少く小さな推力によって大明けが
できる数々の特徴を有する。As described in detail above, the present invention is characterized in that the edges of the grinding surfaces of two equally-shaped grindstones are arranged symmetrically with a gap between them, and the intersection angle of the grinding surfaces on a plane containing the grindstone axis is the same as that of the drill to be ground. The axis of the grinding wheel is set on the same plane so that it is equal to the tip angle of the grinding wheel, and a guide means is provided to send the drill to be ground on the axis of symmetry of the grinding wheel.Therefore, there is no need for a multi-axis movement mechanism for the grinding wheel or drill, and the grinding process can be easily performed. The structure of the disk is extremely simple, which can significantly reduce costs, and by simply rotating the drill while feeding, it is easy to grind the main cutting edge and then thin the main flank. Moreover, since the two grindstones can be easily made symmetrically, there is less unevenness in the lip height due to the chisel edge, and the grinding accuracy of the drill is high, resulting in good sharpness and hole accuracy, and depending on the workpiece, there is no need for finishing with a hammer. It can be done. In addition, since a gap is provided at the edge of the grinding surface, accurate chisel edges and thinning can be easily formed, and the cutting resistance is low and the cutting force can be cut with a small thrust force.
１１１図は研削盤の平面図
ｊ１２［１ｔｊ１１ ［１６Ａ−Ａ線ｔｊＮＩＡ第３図
は第２実施例の砥石とドリルの関係を示す図
＃Ｉ４図はｌＩ３実施例の砥石とドリルの関係を示す図
である。
５・・・砥石 ５＆・・・研削面６・・・砥石軸
７・・・モータ
１１・・・治具
「
第１ｒＩ！Ｊ
第４図Figure 111 is a plan view of the grinding machine. It is. 5... Grinding wheel 5 &... Grinding surface 6... Grinding wheel shaft 7... Motor 11... Jig "1rI!J Fig. 4
Claims (1)
転される２本の砥石軸の軸心が同一平面上に設けられか
つ前記２個の砥石は対称に配されていてその研削面は、
前記平面上での交角が被研削ドリルの先端角と等しい角
度になされるとともに該交角の頂点において前記研削面
端が僅かの隙間を有するように配され前記交角の頂点を
通る砥石の対称軸と同軸の被研削ドリルを索内する部材
を設けたことを特徴とするドリル研削盤 ―）砥石軸鏡平行であって砥石の外周の円錐面を研削面
としたものである特許請求の範囲第１項記載のド９＃研
１ｌＩＩＩ１１ （荀砥石軸心は被研削ドリル挿入側で交差していて砥石
側面が研削面である特許請求の範囲第１項記載のドリル
研削盤 し）砥石軸るは被研削ドリルの反対側で交差していて砥
石外周が研削面である特許請求の範囲第１項記載のドリ
ル研削盤。(1) The axes of two whetstone shafts, each having a whetstone of the same shape at the shaft end and rotating in the same direction, are provided on the same plane, and the two whetstones are arranged symmetrically. The grinding surface is
The intersection angle on the plane is equal to the tip angle of the drill to be ground, and the end of the grinding surface is arranged with a slight gap at the apex of the intersection angle, and the symmetry axis of the grindstone passes through the apex of the intersection angle. A drill grinding machine characterized by being provided with a member that holds a coaxial drill to be ground.) A grinding wheel axis is parallel to the mirror, and the conical surface on the outer periphery of the grinding wheel is used as the grinding surface.Claim 1 (Drill grinding machine according to claim 1, in which the grinding wheel axes intersect on the insertion side of the drill to be ground and the side surface of the grinding wheel is the grinding surface) The drill grinding machine according to claim 1, wherein the grinding wheels intersect on opposite sides of the grinding drill and the outer periphery of the grinding wheels is the grinding surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17597081A JPS5877435A (en) | 1981-11-02 | 1981-11-02 | Drill grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17597081A JPS5877435A (en) | 1981-11-02 | 1981-11-02 | Drill grinding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5877435A true JPS5877435A (en) | 1983-05-10 |
Family
ID=16005425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17597081A Pending JPS5877435A (en) | 1981-11-02 | 1981-11-02 | Drill grinding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5877435A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6456946U (en) * | 1987-10-03 | 1989-04-10 | ||
| JP2008114314A (en) * | 2006-11-01 | 2008-05-22 | Mareo Okada | Drill polishing machine |
-
1981
- 1981-11-02 JP JP17597081A patent/JPS5877435A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6456946U (en) * | 1987-10-03 | 1989-04-10 | ||
| JP2008114314A (en) * | 2006-11-01 | 2008-05-22 | Mareo Okada | Drill polishing machine |
| JP4496196B2 (en) * | 2006-11-01 | 2010-07-07 | 希雄 岡田 | Drill polishing machine |
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