JPS6228137A - End-mill holder - Google Patents
End-mill holderInfo
- Publication number
- JPS6228137A JPS6228137A JP60170351A JP17035185A JPS6228137A JP S6228137 A JPS6228137 A JP S6228137A JP 60170351 A JP60170351 A JP 60170351A JP 17035185 A JP17035185 A JP 17035185A JP S6228137 A JPS6228137 A JP S6228137A
- Authority
- JP
- Japan
- Prior art keywords
- end mill
- collet
- mill
- holder
- soft layer
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
- B23B31/201—Characterized by features relating primarily to remote control of the gripping means
- B23B31/202—Details of the jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/33—Elastomers, e.g. rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/20—Collet chucks
- B23B2231/2048—Collets comprising inserts
- B23B2231/2067—Soft inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Gripping On Spindles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はコレットなどのエンドミル保持具の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in end mill holders such as collets.
従来周知のエンドミル保持具は、第１図に示す通り、例
えばコレット２及びホルダ３から成り、エンドミルｌが
コレット２などを介してホルダ３に保持されており、コ
レット２はエンドミル１の挿着用部材として介在される
ものである。As shown in FIG. 1, a conventionally known end mill holder consists of, for example, a collet 2 and a holder 3. An end mill l is held by the holder 3 via the collet 2, etc., and the collet 2 is a member for inserting the end mill 1. It is something that is mediated as such.
第２図は、このコレット２の一例を示しており、（Ａ）
は正面図であり、（Ｂ）は側面図である。FIG. 2 shows an example of this collet 2, and (A)
is a front view, and (B) is a side view.
そして第３図はエンドミル１のコレット２に対する挿着
状態を表わしている。FIG. 3 shows the state in which the end mill 1 is inserted into the collet 2.
第２図によれば、円筒部４に鍔５を一体的に設け、この
鍔５はコレット２がボルダ３に定位置に固定されるべく
役目をはたしている。円筒部４及び鍔５には複数条の切
込み６が形成されているので、コレットの内径ｒの寸法
が若干自在に調整することができる。According to FIG. 2, a collar 5 is integrally provided on the cylindrical portion 4, and this collar 5 serves to fix the collet 2 to the boulder 3 in a fixed position. Since a plurality of notches 6 are formed in the cylindrical portion 4 and the collar 5, the inner diameter r of the collet can be adjusted somewhat freely.
しかしながら、エンドミル１とコレット２は第３図に示
す通り、エンドミル１のシャンク部７のうちポイントａ
又はその近傍で接触しているにすぎなく、シャンク部７
の側面全体がほぼ均一に接触しているものでない。或い
は第３図に示す以外、シャンク部７のポイントｂやボン
イトＣ又はそれぞれの近傍で接触することもありえる。However, as shown in FIG. 3, the end mill 1 and collet 2 have a
or the shank portion 7
The entire side surface of the surface is not in almost uniform contact. Alternatively, the contact may occur at point b or point C of the shank portion 7, or in the vicinity of each other, other than as shown in FIG.
従って、ホルダ３に加わる回転駆動力がエンドミル１に
対して局所的にしか伝達しないため、ボンイトａ、ｂ又
はＣを支点としてエンドミル１が振動を引き起こすこと
になり、エンドミルの切削性能を劣化せしめている。Therefore, the rotational driving force applied to the holder 3 is only locally transmitted to the end mill 1, which causes the end mill 1 to vibrate using the bolts a, b, or C as a fulcrum, which deteriorates the cutting performance of the end mill. There is.
そして、かかる問題を解決するためにシャンク部７の径
とコレット２の内径との嵌め合い公差を可及的に小さく
することも考えられるが、そのためにシャンク部７の側
面とコレット２の内面とに精緻な加工性が要求されるこ
とからして実用性に欠けるものである。In order to solve this problem, it is possible to reduce the fitting tolerance between the diameter of the shank part 7 and the inner diameter of the collet 2 as much as possible. It lacks practicality because it requires precise workability.
（発明の目的〕
本発明は上記事情に鑑みて完成され、その目的はエンド
ミル自体が有する切削特性を維持せしめて長寿命且つ高
信頼性のエンドミルと成るためのエンドミル保持具を提
供することにある。(Object of the Invention) The present invention was completed in view of the above circumstances, and its purpose is to provide an end mill holder that maintains the cutting characteristics of the end mill itself and provides a long-life and highly reliable end mill. .
本発明によれば、エンドミルが挿着される保持具の、エ
ンドミルのシャンク部との当接面に、該エンドミルを構
成する材料よりも軟質な層が形成されていることを特徴
とするエンドミル保持具が提供される。According to the present invention, the end mill holder is characterized in that a layer softer than the material constituting the end mill is formed on the contact surface of the holder into which the end mill is inserted, which contacts the shank portion of the end mill. Equipment will be provided.
以下、第１図及び第２図に示した如き、エンドミルがコ
レットなどのエンドミル挿着用部材を介してホルダに挿
着された場合を例にとって詳細に説明する。Hereinafter, a case in which an end mill is inserted into a holder through an end mill insertion member such as a collet as shown in FIGS. 1 and 2 will be described in detail.
第４図は本発明に係るコレット２ａを示しており、第５
図はこのコレット２ａに対するエンドミルの挿着状態を
示している。FIG. 4 shows a collet 2a according to the present invention.
The figure shows how the end mill is inserted into the collet 2a.
本発明によれば、コレット２ａの内面に、エンドミルよ
りも軟質な層８を適当な厚みで形成することが重要であ
る。According to the present invention, it is important to form a layer 8 having an appropriate thickness on the inner surface of the collet 2a, which is softer than the end mill.
即ち、エンドミル１は一般的にハイス、超硬、サーメッ
ト及びセラミックスより選択された材料から成っている
ので、この軟質層８には、例えばプラスチック、ゴム、
金属などを用いるのが望ましく、この層はメッキなどの
薄膜形成技術、焼き嵌め、塗布、接着などにより形成さ
れる。これによりシャンク部７の側面とコレット２ａの
内面とを、その全面に亘って偏りなく均等に密着させて
、ホルダ３に加わる回転駆動力をエンドミル１へ確実に
伝達させることができる。そして、エンドミル１とコレ
ット２ａとの接着面が大きくなると共に軟質層８がエン
ドミル１の振動を吸収するために、従来のエンドミルに
発生した振動は皆無となった。その結果、後述の実施例
が示す通り、長寿命化が達成できた他に、高精度の要求
される切削性に対してもその性能を長期に亘って維持す
ることができる。That is, since the end mill 1 is generally made of a material selected from high speed steel, carbide, cermet, and ceramics, the soft layer 8 may include, for example, plastic, rubber,
It is preferable to use metal or the like, and this layer is formed by a thin film forming technique such as plating, shrink fitting, coating, adhesion, etc. Thereby, the side surface of the shank portion 7 and the inner surface of the collet 2a can be evenly and closely contacted over the entire surface thereof, and the rotational driving force applied to the holder 3 can be reliably transmitted to the end mill 1. Since the adhesive surface between the end mill 1 and the collet 2a becomes larger and the soft layer 8 absorbs the vibrations of the end mill 1, the vibrations that occur in conventional end mills are completely eliminated. As a result, as shown in the examples described below, not only a longer life can be achieved, but also the cutting performance required for high precision can be maintained over a long period of time.
更に本発明によれば、軟質層８の厚みはその材質とも関
係するが、０．００５〜０．１ｍｍの範囲に設定するの
が望ましい。しかしながら、この範囲以外の厚みに設定
しても何ら差支えなく、例えば軟質層８の材質を変える
ことによって種々の変更は可能である。Furthermore, according to the present invention, the thickness of the soft layer 8 is preferably set in the range of 0.005 to 0.1 mm, although it is also related to its material. However, there is no problem even if the thickness is set outside this range, and various changes can be made by changing the material of the soft layer 8, for example.
本発明に係る軟質層の材料には、エンドミルを構成する
材料よりも軟質であって、硬度ＨＲＡが９０以下のもの
がよく、望ましくはブリネル硬度（１８が４００以下の
範囲内で材料を選択すればよい。この材料には、後述す
る材料の他に、焼き入れ鋼、強化プラスチック、ＦＲＰ
樹脂、グラファイトなどがある。The material for the soft layer according to the present invention is preferably one that is softer than the material constituting the end mill and has a hardness HRA of 90 or less, preferably a Brinell hardness (18) of 400 or less. In addition to the materials mentioned below, this material includes hardened steel, reinforced plastic, and FRP.
There are resins, graphite, etc.
第１表に示す通り、超硬（ＪＩＳ規格に２０に相当する
）、サーメット（ＮｂＣ系ＴｉＣ−ＴｉＮ）、ハイス（
高速度ｗＡ） 、セラミックス（窒化珪素質焼結体）よ
り選ばれるエンドミル（φ６．２枚方エンドミル、切込
みアキシャル方向５ｍｍ、ラジアル方向１ ｍｍ。As shown in Table 1, carbide (equivalent to JIS standard 20), cermet (NbC TiC-TiN), high speed steel (
High speed wA), an end mill (φ6.2 Hirakata end mill, 5 mm in the axial direction, 1 mm in the radial direction) selected from ceramics (silicon nitride sintered body).
送りｆ ＝０．０３５ｍｍ／刃）に第４図に示す如き層
を形成してエンドミルの寿命特性を切削長さで判定した
。A layer as shown in FIG. 4 was formed at a feed rate f = 0.035 mm/blade), and the life characteristics of the end mill were determined based on the cutting length.
第１表より明らかな通り、軟質層を形成した保持具を用
いると比較例と比べて寿命を顕著に延ばすことができた
。As is clear from Table 1, using the holder with a soft layer formed thereon could significantly extend the life compared to the comparative example.
又、他の実施例として第６図に示す通り、コレットを介
在させずにエンドミルを挿着させた場合でもよく、シャ
ンク部との当接面に軟質Ｊｉ ８ ａが形成されたエン
ドミル保持具９が表してあり、ネジ１０によりエンドミ
ル１が固定されている。本発明者の実験により、上図の
エンドミル保持具であっても本発明の目的が達成できた
のを確認した。Further, as another embodiment, as shown in FIG. 6, the end mill may be inserted without intervening the collet, and the end mill holder 9 has a soft Ji 8 a formed on the contact surface with the shank part. is shown, and the end mill 1 is fixed by screws 10. Through experiments conducted by the present inventor, it was confirmed that the object of the present invention could be achieved even with the end mill holder shown in the above figure.
上述の通り、本発明のエンドミルを用いると、保持具に
加わる回転駆動力はエンドミルへ確実に伝達され、且つ
軟質層がエンドミルの振動を吸収するため長寿命且つ高
信頼性のエンドミルが提供できることになった。As mentioned above, when the end mill of the present invention is used, the rotational driving force applied to the holder is reliably transmitted to the end mill, and the soft layer absorbs vibrations of the end mill, making it possible to provide an end mill with long life and high reliability. became.
更に、本発明によれば、エンドミルの先端部にその中心
軸と直角方向から加わる衝撃力に対しても軟質層が緩衝
作用を有するため、エンドミルの切削性能を長期間に亘
って維持することができた。Furthermore, according to the present invention, the soft layer has a buffering effect against the impact force applied to the tip of the end mill from a direction perpendicular to its central axis, so that the cutting performance of the end mill can be maintained over a long period of time. did it.
尚、本発明は上記実施例に限らず、本発明の要旨を逸脱
しない範囲において、種々の変更や改良等は何ら差支え
ない。Note that the present invention is not limited to the above embodiments, and various changes and improvements may be made without departing from the gist of the present invention.
第１図はエンドミルの挿着保持状態を示すエンドミル保
持具の一部断面図、第２図の（Ａ）及び（Ｂ）はそれぞ
れコレットの一部破断面正面図及び側面図、第３図は従
来のエンドミルのコレットに対する挿着状態を示す断面
図、第４図は本発明の実施例に示したコレットの破断面
図、第５図は第４図に示したコレットに対するエンドミ
ルの挿着状態を示した一部断面図、第６図は本発明の他
の実施例としてエンドミルの挿着保持状態を示すエンド
ミル保持具の破断面図である。
１・・・エンドミル ２＋２ａ”コレット３・・・ホ
ルダ ７・・・シャンク部８．８ａ・・・軟質層Fig. 1 is a partial sectional view of the end mill holder showing the state in which the end mill is inserted and held, Fig. 2 (A) and (B) are a partially broken front view and side view of the collet, respectively, and Fig. 3 is a partially cutaway front view and side view of the collet. FIG. 4 is a cross-sectional view showing how the conventional end mill is inserted into the collet, FIG. 4 is a broken sectional view of the collet shown in the embodiment of the present invention, and FIG. 5 is a cross-sectional view showing how the end mill is inserted into the collet shown in FIG. The partially sectional view shown in FIG. 6 is a broken sectional view of an end mill holder showing a state in which an end mill is inserted and held as another embodiment of the present invention. 1... End mill 2+2a" collet 3... Holder 7... Shank part 8.8a... Soft layer
Claims (1)
ク部との当接面に、該エンドミルを構成する材料よりも
軟質な材料から成る層が形成されていることを特徴とす
るエンドミル保持具。An end mill holder characterized in that a layer made of a material softer than the material constituting the end mill is formed on a surface of the holder into which the end mill is inserted, which comes into contact with a shank portion of the end mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60170351A JPH0741451B2 (en) | 1985-07-31 | 1985-07-31 | End mill holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60170351A JPH0741451B2 (en) | 1985-07-31 | 1985-07-31 | End mill holder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6228137A true JPS6228137A (en) | 1987-02-06 |
| JPH0741451B2 JPH0741451B2 (en) | 1995-05-10 |
Family
ID=15903318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60170351A Expired - Lifetime JPH0741451B2 (en) | 1985-07-31 | 1985-07-31 | End mill holder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741451B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010540262A (en) * | 2007-10-01 | 2010-12-24 | ミルコナ・アクチボラゲット | New products and their manufacturing methods within the scope of material processing |
| CN105834909A (en) * | 2016-05-30 | 2016-08-10 | 苏州微米光学科技有限公司 | Tight grinding fixture of glass column grinding device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023164U (en) * | 1973-06-27 | 1975-03-15 | ||
| JPS5870842U (en) * | 1981-11-09 | 1983-05-13 | 東芝機械株式会社 | Machine tool spindle structure |
| JPS5973211A (en) * | 1982-10-18 | 1984-04-25 | Nikken Kosakusho:Kk | Chuck |
-
1985
- 1985-07-31 JP JP60170351A patent/JPH0741451B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023164U (en) * | 1973-06-27 | 1975-03-15 | ||
| JPS5870842U (en) * | 1981-11-09 | 1983-05-13 | 東芝機械株式会社 | Machine tool spindle structure |
| JPS5973211A (en) * | 1982-10-18 | 1984-04-25 | Nikken Kosakusho:Kk | Chuck |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010540262A (en) * | 2007-10-01 | 2010-12-24 | ミルコナ・アクチボラゲット | New products and their manufacturing methods within the scope of material processing |
| CN105834909A (en) * | 2016-05-30 | 2016-08-10 | 苏州微米光学科技有限公司 | Tight grinding fixture of glass column grinding device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0741451B2 (en) | 1995-05-10 |
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