JPS6346170Y2 - - Google Patents
Info
- Publication number
- JPS6346170Y2 JPS6346170Y2 JP1983052382U JP5238283U JPS6346170Y2 JP S6346170 Y2 JPS6346170 Y2 JP S6346170Y2 JP 1983052382 U JP1983052382 U JP 1983052382U JP 5238283 U JP5238283 U JP 5238283U JP S6346170 Y2 JPS6346170 Y2 JP S6346170Y2
- Authority
- JP
- Japan
- Prior art keywords
- collet
- circumferential surface
- handle
- twisted
- inner circumferential
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
Landscapes
- Gripping On Spindles (AREA)
Description
【考案の詳細な説明】
本考案は回転用工具保持装置の内周面に挿入保
持され、刃具柄部を握持するコレツト、主として
外周面及び内周面がストレート状（非テーパ状）
に形成されたコレツトに関する。[Detailed description of the invention] The present invention is a collet that is inserted and held in the inner peripheral surface of a rotating tool holding device and grips the handle of the cutting tool, and the outer peripheral surface and the inner peripheral surface are mainly straight (non-tapered).
Concerning the collection formed in
まず本考案の第１図を利用して一般的な工具保
持装置及びストレートコレツトの構造について説
明すると、工具保持装置はチヤツク筒１と、柄部
２と、締付ナツト３と、連結リング４と、締付テ
ーパ筒５よりなつている。柄部２はチヤツク筒１
の後端に一体形成されると共に、工作機械の回転
主軸６の挿入孔７に嵌合接続され、例えば軸方向
と平行なボルト等により後方へ締め付けられてい
る。テーパ筒５はその外周面が前開きテーパ状に
形成されると共に、内周面８がストレート状（非
テーパ状）に形成されている。テーパ筒５の前端
部は連結リング４に係合し、連結リング４と共に
軸方向移動自在となつている。締付ナツト３は、
連結リング４に対して回動可能かつ連結リング４
と共に軸方向移動可能となるように、ボール１０
を介して連結リング４に連結されている。締付ナ
ツト３はチヤツク筒１の外側に螺合している。 First, the structure of a general tool holding device and straight collet will be explained using FIG. 1 of the present invention. The tightening taper tube 5 is arranged as follows. Handle part 2 is chuck tube 1
It is integrally formed at the rear end of the machine tool, and is fitted and connected to the insertion hole 7 of the rotating main shaft 6 of the machine tool, and is tightened rearward with, for example, a bolt parallel to the axial direction. The tapered tube 5 has an outer circumferential surface tapered to open toward the front, and an inner circumferential surface 8 formed straight (non-tapered). The front end of the tapered cylinder 5 engages with the connecting ring 4 and is movable in the axial direction together with the connecting ring 4. The tightening nut 3 is
Rotatable with respect to the connecting ring 4 and connecting ring 4
The ball 10 is movable in the axial direction with the ball 10.
It is connected to the connecting ring 4 via. A tightening nut 3 is screwed onto the outside of the chuck tube 1.
ストレートコレツト１２は内周面１３及び外周
面１４が共にストレート状に形成されており、上
記テーパ筒５のストレート内周面８に挿入され
る。コレツト１２には軸心方向と平行な複数本の
縮径用割溝１７（第３、第４図）が、円周方向に
等間隔を隔てて形成されている。 The straight collet 12 has an inner circumferential surface 13 and an outer circumferential surface 14 both formed in a straight shape, and is inserted into the straight inner circumferential surface 8 of the tapered cylinder 5. A plurality of diameter reducing grooves 17 (FIGS. 3 and 4) parallel to the axial direction are formed in the collet 12 at equal intervals in the circumferential direction.
刃具１５は例えば後方から見て右刃右ねじれの
構造を有しており、その柄部１６がコレツト内周
面１３に挿入されている。 The cutter 15 has, for example, a right-handed blade with a right-handed twist when viewed from the rear, and a handle 16 thereof is inserted into the inner circumferential surface 13 of the collet.
上記構成の工具保持装置等において、締付ナツ
ト３を締め付けることにより、連結リング４を介
してテーパ筒５を後方へ押し込み、テーパ筒５及
びコレツト１２を縮径させ、コレツト内周面１３
で刃具柄部１６を握持するのである。 In the tool holding device or the like having the above structure, by tightening the tightening nut 3, the tapered cylinder 5 is pushed rearward through the connecting ring 4, the diameter of the taper cylinder 5 and the collet 12 is reduced, and the inner circumferential surface 13 of the collet is reduced.
The handle 16 of the cutter is gripped with the handle 16.
このように保持される刃具１５を後方から見て
右回転させてワークを切削する場合には、刃具１
６に対してワークから切削抵抗力がかかる。この
切削抵抗力を円周方向分力と軸方向分力とに分解
すると、上記の右刃右ねじれの刃具１５では、左
回転方向への円周方向分力と、刃具１５を前方へ
抜き出す方向への軸方向分力になる。一方チヤツ
ク筒１から刃具柄部１６へは、テーパ筒内周面８
とコレツト外周面１４間の摩擦伝達力と、コレツ
ト内周面１３と刃具柄部１６間の摩擦伝達力を介
して回転力が伝えられているのであるが、コレツ
ト内周面１３と刃具柄部１６間の摩擦面積の方が
テーパ筒内周面８とコレツト外周面１４間の摩擦
面積よりも小さいことから、前述の切削抵抗力に
よりコレツト内周面１３と刃具柄部１６間で軸方
向及び円周方向にスリツプが生じ、切削精度に影
響を与えることが多い。 When cutting the workpiece by rotating the cutting tool 15 held in this way clockwise when viewed from the rear, the cutting tool 1
Cutting resistance force is applied from the workpiece to 6. If this cutting resistance force is broken down into a circumferential force and an axial force, in the case of the above-mentioned right-handed cutting tool 15 with a right-handed twist, there is a circumferential force in the counterclockwise rotation direction and a direction in which the cutting tool 15 is pulled out forward. becomes the axial component of force. On the other hand, from the chuck tube 1 to the cutter handle 16, there is a tapered tube inner circumferential surface 8.
The rotational force is transmitted through the frictional transmission force between the collet outer peripheral surface 14 and the frictional transmission force between the collet inner peripheral surface 13 and the cutter handle 16. 16 is smaller than the friction area between the inner circumferential surface 8 of the tapered cylinder and the outer circumferential surface 14 of the collet. Slips often occur in the circumferential direction and affect cutting accuracy.
本考案は上述のスリツプ現象、特に軸方向のス
リツプ現象を大幅に減少させ、切削精度を向上さ
せることを目的としており、その要旨は、コレツ
ト内周面に、作業時に刃具にかかる切削抵抗力の
スラスト方向分力に対抗する分力を与えうる方向
にねじれたねじれ溝を形成したことである。以下
図面により本考案を説明する。 The purpose of this invention is to significantly reduce the above-mentioned slip phenomenon, especially the axial slip phenomenon, and improve cutting accuracy. This is because a twisted groove is formed that is twisted in a direction capable of applying a component force that counteracts the thrust direction component force. The present invention will be explained below with reference to the drawings.
第２図において、刃具１５が後方から見て右刃
右ねじれの構造を有している場合には、コレツト
１２のストレート状内周面１３には後方から見て
右ねじれのねじれ溝２０が形成されている。ねじ
れ溝２０は刃具柄部１６に当接しうるコレツト内
周面１３の軸方向全範囲Ｌ１にわたつて形成され
ている。ねじれ溝２０の断面形状は、例えば半円
形状に形成されている。 In FIG. 2, when the cutting tool 15 has a right-handed helical structure when viewed from the rear, a right-handed helical groove 20 is formed in the straight inner circumferential surface 13 of the collet 12. has been done. The twisted groove 20 is formed over the entire axial range L1 of the inner circumferential surface 13 of the collet that can come into contact with the blade handle 16. The cross-sectional shape of the twisted groove 20 is, for example, semicircular.
なおねじれ溝２０の断面形状としては矩形状等
各種考えられる。 The cross-sectional shape of the twisted groove 20 may be various, such as a rectangular shape.
刃具１５を後方から見て右回転させてワークを
切削する場合において、ワークによる切削抵抗力
の円周方向分力に対しては、ねじれ溝２０による
柄部１６の油膜面破断作用によつて摩擦係数が増
加することと、割溝１７の円周方向端縁（エツ
ジ）が柄部１６へ噛み付くことにより、充分に耐
持（耐久保持）でき、円周方向のスリツプ現象を
防止することができる。ワークによる切削抵抗力
の軸方向分力、即ち刃具１５を前方へ引き抜こう
とする分力に対しては、ねじれ溝２０の軸方向端
縁（エツジ部）の噛み付きにより耐持し、軸方向
のスリツプ現象を防止することができる。 When cutting a workpiece by rotating the cutting tool 15 clockwise when viewed from the rear, the circumferential component of the cutting resistance force due to the workpiece is counteracted by friction due to the oil film surface breaking action of the handle 16 caused by the helical groove 20. By increasing the coefficient and by causing the circumferential edges of the grooves 17 to bite into the handle 16, sufficient durability (durable retention) can be achieved and circumferential slip phenomenon can be prevented. . The axial component of the cutting resistance force by the workpiece, that is, the component force that tries to pull out the cutting tool 15 forward, is supported by the biting of the axial edges (edges) of the helical groove 20, and the axial slip occurs. This phenomenon can be prevented.
なお刃具１５が右刃左ねじれの構造を有するも
のであつて、右回転することによりワークから後
方への軸方向分力がかかるような場合には、例え
ば第５図に示すように、左ねじと同様なねじれ方
向のねじれ溝２０′をコレツト１２の内周面１３
に形成する。 Note that if the cutting tool 15 has a structure with a right-hand edge and a left-hand twist, and when it rotates to the right, an axial component of force is applied backward from the workpiece, for example, as shown in FIG. A helical groove 20' in a similar torsional direction is formed on the inner circumferential surface 13 of the collect 12.
to form.
また本考案は第６図に示すように、刃具柄部１
６を握持するコレツト内周面１３の軸方向幅Ｌ１
が短い場合には、実用的効果が大きい。 In addition, as shown in FIG.
Axial width L1 of the inner circumferential surface 13 of the collet that grips the collet 6
When is short, the practical effect is large.
以上説明したように本考案は、回転用工具保持
装置の内周面８に挿入保持され、刃具柄部１６を
握持するコレツトにおいて、刃具柄部１６を押圧
するコレツト内周面１３に、作業時に刃具１５に
かかる切削抵抗力のスラスト方向分力（軸方向分
力）に対向する分力を与えうる方向にねじれたね
じれ溝２０を形成しているので、ねじれ溝２０の
軸方向端縁（エツジ）の刃具柄部１６への噛付に
より、刃具柄部１６のコレツト１２に対する軸方
向のスリツプ現象を確実に防止することができ、
またねじれ溝２０による刃具柄部１６の油膜面破
断作用によつて、コレツト内周面１３と刃具柄部
１６間の摩擦係数を増加させ、円周方向のスリツ
プ防止にも充分に役立つ。従つて切削精度が向上
するのは勿論のこと、工作機械の動力損失を大幅
に減少させることができる。 As explained above, in the present invention, in the collet that is inserted and held in the inner circumferential surface 8 of the rotating tool holding device and grips the cutter handle 16, the inner circumferential surface 13 of the collet that presses the cutter handle 16 is Since the twisted groove 20 is formed to be twisted in a direction that can provide a force that is opposite to the thrust direction component (axial component) of the cutting resistance force applied to the cutting tool 15, the axial end edge of the twisted groove 20 ( By biting the blade (edge) into the blade handle 16, it is possible to reliably prevent the blade handle 16 from slipping in the axial direction with respect to the collet 12.
Further, the oil film surface breakage of the cutter handle 16 by the helical groove 20 increases the coefficient of friction between the inner circumferential surface 13 of the collet and the cutter handle 16, which is also effective in preventing slips in the circumferential direction. Therefore, not only the cutting accuracy is improved, but also the power loss of the machine tool can be significantly reduced.
本考案の利点をより詳しく説明すると：
軸心方向と平行な縮径用割溝を有し、刃具柄部
を半径方向内方に押圧して押圧面の摩擦力だけで
柄部を保持してトルク伝達するコレツトであり、
このようなコレツトにおいて、コレツト内周面１
３に、該内周面１３の軸方向略全範囲Ｌ１にわた
るねじれ溝２０を形成し、ねじれ溝２０は作業時
に刃具にかかる切削抵抗力のスラスト方向分力に
対向する分力を与えうる方向にねじれると共に、
ねじれ溝間にコレツト内周面１３部分を押圧面と
して残存させており、これによりコレツト内周面
１３の摩擦による握持力自体を直接向上させてい
るのである。 To explain the advantages of the present invention in more detail: It has a diameter-reducing groove parallel to the axial direction, presses the blade handle radially inward, and holds the handle only by the frictional force of the pressing surface. It is a collet that transmits torque.
In such a collet, the inner circumferential surface 1 of the collet
3, a twisted groove 20 is formed over substantially the entire axial range L1 of the inner circumferential surface 13, and the twisted groove 20 is oriented in a direction capable of applying a force opposite to the thrust direction component of the cutting resistance force applied to the cutting tool during operation. As it twists,
A portion of the inner circumferential surface 13 of the collet remains between the helical grooves as a pressing surface, thereby directly improving the gripping force itself due to the friction of the inner circumferential surface 13 of the collet.
即ちねじれ溝２０のエツジの噛付により軸方向
のスリツプを防止し、ねじれ溝２０によるコレツ
ト内周面の油膜破断作用並びに割溝１７のエツジ
の噛み付きによりコレツト内周面１３の摩擦係数
を増加させて、円周方向のスリツプを防止してい
るのである。 That is, axial slippage is prevented by the biting of the edges of the helical grooves 20, and the friction coefficient of the inner circumferential surface 13 of the collet is increased by the action of the torsional grooves 20 to break the oil film on the inner circumferential surface of the collet and the biting of the edges of the split grooves 17. This prevents slips in the circumferential direction.
なお刃具１５としてはエンドミル、リーマ等の
各種回転切削工具が考えられる。またコレツト１
２が保持される工具保持装置としては、第１図に
示すような装置に限定されるものではなく、例え
ばニードルローラ等を介して締付ナツト３等がチ
ヤツク筒１に嵌合するような工具保持装置に適用
することもできる。 Note that the cutting tool 15 may be various rotary cutting tools such as an end mill or a reamer. Also collection 1
The tool holding device in which the chuck 2 is held is not limited to the device shown in FIG. It can also be applied to holding devices.
第１図は本考案によるコレツトを備えた工具保
持装置の部分縦断面図、第２図は第１実施例を示
す第１図の要部拡大図、第３図は第２図の矢視
図、第４図は第２図の矢視図、第５、第６図は
それぞれ第２、第３実施例を示す要部の部分縦断
面図である。１３……コレツト内周面、１５……
刃具、１６……刃具柄部、２０……ねじれ溝。
Fig. 1 is a partial vertical sectional view of a tool holding device equipped with a collet according to the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1 showing the first embodiment, and Fig. 3 is a view taken in the direction of the arrow in Fig. 2. , FIG. 4 is a view in the direction of the arrow in FIG. 2, and FIGS. 5 and 6 are partial vertical sectional views of essential parts showing the second and third embodiments, respectively. 13... Collet inner peripheral surface, 15...
Cutting tool, 16... Cutting tool handle, 20... Twisted groove.
Claims (1)
と共に、軸心方向と平行な縮径用割溝を有し、刃
具柄部を半径方向内方に押圧して押圧面の摩擦力
だけで柄部を保持し、トルク伝達するコレツトに
おいて、刃具柄部１６の外周面を半径方向内方側
に押圧するコレツト内周面１３に、該内周面１３
の軸方向略全範囲Ｌ１にわたるねじれ溝２０を形
成し、該ねじれ溝２０は作業時に刃具にかかる切
削抵抗力のスラスト方向分力に対向する分力を与
えうる方向にねじれると共に、ねじれ溝間にコレ
ツト内周面１３部分を押圧面として残存させてい
ることを特徴とするコレツト。 It is inserted and held in the inner peripheral surface of the rotating tool holding device, and has a diameter reduction groove parallel to the axial direction, and presses the cutting tool handle radially inward using only the frictional force of the pressing surface. In the collet that holds the handle and transmits torque, an inner circumferential surface 13 is attached to the inner circumferential surface 13 of the collet that presses the outer circumferential surface of the cutter handle 16 inward in the radial direction.
A twisted groove 20 is formed over substantially the entire axial range L1, and the twisted groove 20 is twisted in a direction capable of applying a force opposite to the thrust direction component of the cutting resistance force applied to the cutting tool during operation, and there is a gap between the twisted grooves. A collet characterized in that a portion of the inner peripheral surface 13 of the collet remains as a pressing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5238283U JPS59156713U (en) | 1983-04-07 | 1983-04-07 | Collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5238283U JPS59156713U (en) | 1983-04-07 | 1983-04-07 | Collection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59156713U JPS59156713U (en) | 1984-10-20 |
| JPS6346170Y2 true JPS6346170Y2 (en) | 1988-12-01 |
Family
ID=30182738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5238283U Granted JPS59156713U (en) | 1983-04-07 | 1983-04-07 | Collection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59156713U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10799992B2 (en) * | 2015-09-01 | 2020-10-13 | Vektek, Inc. | Clamping mechanism for hydraulic work support |
| JP2022001390A (en) * | 2020-06-22 | 2022-01-06 | 株式会社日研工作所 | Straight collet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5126191A (en) * | 1974-08-28 | 1976-03-03 | Hitachi Ltd | Sentatsuki no konhohoho |
-
1983
- 1983-04-07 JP JP5238283U patent/JPS59156713U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5126191A (en) * | 1974-08-28 | 1976-03-03 | Hitachi Ltd | Sentatsuki no konhohoho |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59156713U (en) | 1984-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20050161890A1 (en) | Hammerlock chuck | |
| EP0768930B1 (en) | Chuck | |
| JPH05185310A (en) | Tool chuck | |
| KR100254909B1 (en) | Keyless drill chuck | |
| US4726719A (en) | Drill chuck and tool for rotary drilling and rotary percussion drilling | |
| WO1998029212A1 (en) | Chuck with improved jaw bite | |
| JPS6346170Y2 (en) | ||
| US5680800A (en) | Socket drive extension grip | |
| US6022029A (en) | Chuck assembly | |
| JPH0632267Y2 (en) | Chip remover for drills | |
| US6505840B2 (en) | Quick change chuck | |
| WO1995007161A1 (en) | Chuck device | |
| JPH081763Y2 (en) | Chuck | |
| JPS6137446Y2 (en) | ||
| JPS61226177A (en) | Feeding device for welding wire | |
| JPH0340570Y2 (en) | ||
| JPH0225724B2 (en) | ||
| JP2601298Y2 (en) | Veneer lace chuck | |
| JPS6247653B2 (en) | ||
| CN2195990Y (en) | Gripping device for drilling machine | |
| JPH0592310A (en) | Chuck jaw | |
| JPH0224565Y2 (en) | ||
| JPS6232726Y2 (en) | ||
| JP3673865B2 (en) | Tap fastening structure | |
| FR2556264A1 (en) | Impact and/or rotary drilling tool |