JPH0574716U - Hardened structure of spindle taper hole - Google Patents
Hardened structure of spindle taper holeInfo
- Publication number
- JPH0574716U JPH0574716U JP2250292U JP2250292U JPH0574716U JP H0574716 U JPH0574716 U JP H0574716U JP 2250292 U JP2250292 U JP 2250292U JP 2250292 U JP2250292 U JP 2250292U JP H0574716 U JPH0574716 U JP H0574716U
- Authority
- JP
- Japan
- Prior art keywords
- spindle
- taper hole
- hole
- main shaft
- hardened structure
- 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
Landscapes
- Jigs For Machine Tools (AREA)
- Gripping On Spindles (AREA)
- Turning (AREA)
Abstract
(57)【要約】
【目的】 主軸テーパ穴の傷防止を図ると共に品質の安
定化を図る。
【構成】 主軸テーパ穴に複合無電解ニッケルメッキ層
を形成する。また、主軸を低膨脹材で形成する。
【効果】 打痕,傷の防止が図れると共に、耐摩耗性の
向上、コストダウンが図れる。
(57) [Abstract] [Purpose] To prevent damage to the spindle taper hole and to stabilize the quality. [Structure] A composite electroless nickel plating layer is formed in a spindle tapered hole. Further, the main shaft is made of a low expansion material. [Effect] It is possible to prevent dents and scratches, improve wear resistance, and reduce costs.
Description
【0001】[0001]
本考案は、工作機械の主軸のようにツールホルダの挿着される主軸テーパ穴の 硬化構造に関する。 The present invention relates to a hardened structure of a spindle taper hole into which a tool holder is inserted like a spindle of a machine tool.
【0002】[0002]
例えば、工作機械の主軸のテーパ穴内には各種工具が挿着され、かつ自動工具 交換により挿脱される。そのため、主軸のテーパ穴および工具のツールホルダは 硬化処理され、耐摩耗性を向上すると共に、打痕等の発生を防止する。従来一般 に採用されている主軸テーパ穴の硬化構造としては主軸のテーパ穴の表面を窒化 処理すると共に、ツールホルダ側は滲炭焼入,高周波焼入等により硬化するもの が上げられる。また、主軸テーパ穴の表面処理に関する公知技術として、例えば 、特開平3−3707号公報が上げられる。該公報に開示される主軸テーパ面の 表面処理方法は、まず、窒化鋼からなるからなる主軸の全体を窒化処理した後、 テーパ穴の内面のみを研削しショット処理をする。次に、テーパ穴を硬質クロム メッキし該メッキ層を仕上研削してテーパ穴を所定寸法に仕上げるものである。 For example, various tools are inserted into the taper hole of the spindle of a machine tool, and are inserted and removed by automatic tool exchange. Therefore, the taper hole of the spindle and the tool holder of the tool are hardened to improve wear resistance and prevent dents and the like from occurring. The hardened structure of the spindle taper hole that has been generally adopted in the past is to nitrid the surface of the taper hole of the spindle and harden the tool holder by carburizing and induction hardening. Further, as a known technique relating to the surface treatment of the spindle taper hole, for example, JP-A-3-3707 can be cited. In the surface treatment method for a spindle tapered surface disclosed in this publication, first, the entire spindle made of nitrided steel is nitrided, and then only the inner surface of the tapered hole is ground and shot. Next, the tapered hole is plated with hard chrome, and the plated layer is finish ground to finish the tapered hole to a predetermined size.
【0003】[0003]
テーパ穴を窒化処理し、ツールホルダを滲炭焼入,高周波焼入等により硬度上 げしたものでは、ツールホルダ側に生じた打痕や付着した切粉によりテーパ穴に 傷が生ずる場合が多い。特に、自動工具交換により工具を着脱する工作機械にお いてはツールホルダ側に打痕が生ずる頻度が高く、かつ切粉も付着し易い。テー パ穴に傷が生ずると、その手直しが簡単に出来ず、主軸等を取り外して再加工し なければならない問題点が生ずる。一方、特開平3−3707号公報の表面処理 方法の場合には、硬質クロムメッキのテーパ穴と滲炭焼入等によるツールホルダ との組合わせになるが、両者の硬度差が余りなく、かつクロム層の層厚を厚くす ることが出来ないため、テーパ穴側に傷が発生する場合が依然として生じ易い。 また、以上の従来技術の場合には、主軸の材料として窒化鋼や合金鋼が使用され るため、主軸自体の材料費が高価になると共に、熱膨脹率を低減することが出来 ない問題点もある。 When the taper hole is nitrided and the tool holder is hardened by carburizing or induction hardening, the taper hole is often scratched by the dents or chips adhering to the tool holder. Particularly, in a machine tool in which a tool is attached and detached by automatic tool change, a dent is frequently generated on the tool holder side, and chips are also easily attached. If the taper hole is damaged, it cannot be easily repaired, and there is a problem in that the spindle must be removed and reworked. On the other hand, in the case of the surface treatment method disclosed in JP-A-3-3707, a combination of a taper hole of hard chrome plating and a tool holder by carburizing and quenching, etc. is used, but there is no significant difference in hardness between the two, and chromium is used. Since it is not possible to increase the layer thickness, it is still easy for scratches to occur on the tapered hole side. Further, in the case of the above-mentioned conventional technology, since nitride steel or alloy steel is used as the material of the spindle, the material cost of the spindle itself becomes expensive and there is a problem that the coefficient of thermal expansion cannot be reduced. ..
【0004】 本考案は、以上の問題点を解決するもので、テーパ穴に打痕,傷等の発生がな く、耐摩耗性が向上すると共に、主軸自体を低膨脹材から形成し、コストダウン および熱変位の低減を図るようにした主軸テーパ穴の硬化処理構造を提供するこ とを目的とする。The present invention solves the above-mentioned problems, in which there are no dents, scratches, etc. in the tapered hole, wear resistance is improved, and the spindle itself is formed of a low expansion material, which reduces the cost. It is an object of the present invention to provide a hardening treatment structure for a taper hole of a spindle designed to reduce down and thermal displacement.
【0005】[0005]
本考案は、以上の目的を達成するめに、ツールホルダの挿着される主軸のテー パ穴が、その表面に複合無電解ニッケルメッキ層を形成してなる硬化構造を構成 すると共に、主軸を低熱膨脹材を形成するようにした主軸テーパ穴の硬化構造を 特徴とするものである。 In order to achieve the above object, the present invention forms a hardened structure in which the taper hole of the main shaft into which the tool holder is inserted has a composite electroless nickel plating layer formed on the surface thereof, and the main shaft is lowered. It is characterized by a hardened structure of the spindle taper hole so as to form a thermal expansion material.
【0006】[0006]
主軸のテーパ穴の表面に複合無電解ニッケルメッキ層を形成することにより高 硬度層が形成される。それにより、テーパ穴の打痕,傷等の発生を低減すること が出来る。また、主軸自体を高価の材料から形成する必要がなく低膨脹材が使用 されるためコストダウンと熱変位の低減による品質の安定化が図れる。 A high hardness layer is formed by forming a composite electroless nickel plating layer on the surface of the tapered hole of the main shaft. As a result, it is possible to reduce the occurrence of dents and scratches on the tapered hole. In addition, since it is not necessary to form the main shaft itself from an expensive material and a low expansion material is used, cost reduction and quality stabilization can be achieved by reducing thermal displacement.
【0007】[0007]
以下、本考案の一実施例を図面に基づき説明する。図1はツールホルダ4を有 する工具5が挿着される工作機械の主軸まわりの概要構造を示す。主軸2には内 方に向かって縮径するテーパ穴3が形成されると共に貫通穴8が軸線方向に形成 される。貫通穴8内にはツールホルダ4のプルスタッド7を把持するための把握 爪9およびプッシュロッド10が挿着されている。主軸2は軸受11を介しクイ ル12に枢支され、クイル12は主軸台13にその軸線方向に沿って摺動自在に 支持される。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic structure around a spindle of a machine tool into which a tool 5 having a tool holder 4 is inserted. The main shaft 2 is formed with a tapered hole 3 whose diameter is reduced inward and a through hole 8 is formed in the axial direction. A grasping claw 9 and a push rod 10 for grasping the pull stud 7 of the tool holder 4 are inserted into the through hole 8. The main shaft 2 is pivotally supported by a quill 12 via a bearing 11, and the quill 12 is slidably supported by a headstock 13 along its axial direction.
【0008】 主軸2のテーパ穴3の表面には複合無電解ニッケルメッキ層1が形成される。 一方、ツールホルダ4のテーパ状の外周には滲炭硬化層又は高周波焼入層等の硬 化層6が形成される。複合無電解ニッケルメッキはニューセラメッキとも呼ばれ るもので、硬質クロームメッキ異なる表面硬化処理技術であり、その処理技術は 公知のものである。すなわち、無電解ニッケルメッキ浴中に炭化ケイ素,窒化ホ ウ素等々のニューセラミックスの各種微粉、又は金属微粉等を適量添加し、メッ キと同時にこれらの微粉をメッキ皮膜内に析出,複合させる表面処理技術である 。その特徴としては、耐摩耗性,耐食性,摺動性等の点で優れ、部品の形状の如 何に拘らず膜厚が均一となる。また、通常のニューセラメッキは約Hv750の 硬度が得られ、300℃の熱処理を施す場合にはHv1400の硬度が得られ、 硬質クロームメッキより高硬度になる。また、高荷重でも焼付きが生じない。更 に、動摩擦係数としては硬質クロム対鋼のものに較べかなり小さくなる。以上の 特性により、ニューセラメッキをテーパ穴3内に施すことにより、ツールホルダ 4の打痕や、それに付着した切粉等の異物によりテーパ穴3内には傷等が全く発 生しない。また、耐摩耗性を有するため、高頻度の工具交換に対しても十分に耐 えることが出来る。A composite electroless nickel plating layer 1 is formed on the surface of the tapered hole 3 of the main shaft 2. On the other hand, a hardened layer 6 such as a carburizing hardened layer or an induction hardening layer is formed on the tapered outer periphery of the tool holder 4. The composite electroless nickel plating, which is also called Nucera plating, is a surface hardening treatment technology different from hard chrome plating, and the treatment technology is known. That is, an appropriate amount of various fine powders of new ceramics such as silicon carbide, boron nitride, etc., or metal fine powders are added to the electroless nickel plating bath, and at the same time as plating, these fine powders are deposited and combined in the plating film. It is a processing technology. Its features are excellent in abrasion resistance, corrosion resistance, slidability, etc., and the film thickness is uniform regardless of the shape of the parts. Further, the usual Nucera plating has a hardness of about Hv750, and when subjected to a heat treatment at 300 ° C, a hardness of Hv1400 is obtained, which is higher than that of the hard chrome plating. Moreover, seizure does not occur even under a high load. Furthermore, the coefficient of dynamic friction is considerably smaller than that of hard chrome vs. steel. Due to the above characteristics, by performing the Nucera plating in the taper hole 3, scratches or the like do not occur in the taper hole 3 due to a dent on the tool holder 4 or foreign matter such as chips adhering to the dent. Further, since it has wear resistance, it can sufficiently withstand frequent tool changes.
【0009】 主軸2の材料としては、前記したように窒化鋼や合金鋼のような高価な材料が 使用される。それ等の材料を用いることにより主軸2のテーパ穴3の硬化処理が 可能になる。一方、本実施例のように、テーパ穴3に複合無電解ニッケルメッキ 層1を形成する場合には、主軸2自体の硬化処理が不必要になる。そのため、特 別の材料を使用しなくてもよい。以上のことから、従来の主軸には採用し得なか った低熱膨脹材で主軸形成することが出来る。低熱膨脹材としてはニッケルの含 有量の比較的多い。鋼材が使用される。主軸2と低熱膨脹材で形成することによ り主軸2の熱変位が低減される。As the material of the main shaft 2, an expensive material such as nitrided steel or alloy steel is used as described above. By using these materials, the taper hole 3 of the spindle 2 can be hardened. On the other hand, when the composite electroless nickel plating layer 1 is formed in the tapered hole 3 as in the present embodiment, the hardening treatment of the spindle 2 itself becomes unnecessary. Therefore, it is not necessary to use a special material. From the above, it is possible to form a spindle with a low thermal expansion material that could not be used for the conventional spindle. Nickel content is relatively high as a low thermal expansion material. Steel material is used. By forming the main shaft 2 and the low thermal expansion material, the thermal displacement of the main shaft 2 is reduced.
【0010】 以上の実施例は工作機械の主軸2についての説明であるが、工具の挿脱される 主軸のテーパ穴にも同様に適用される。Although the above-described embodiments have been described with respect to the spindle 2 of the machine tool, the same applies to the taper hole of the spindle into which the tool is inserted and removed.
【0011】[0011]
本考案によれば、次のような効果が上げられる。 (1)主軸のテーパ穴が高硬度の複合無電解ニッケルメッキ層が形成されるため 、テーパ穴の打痕の発生や傷発生が防止される。 (2)セラミック溶射層の耐摩耗性から主軸の寿命が向上し、品質安定化が図れ る。 (3)主軸自体を低膨脹材から形成することにより、コストダウンが図れると共 に、熱変位が低減し、品質の安定化が図れる。 According to the present invention, the following effects can be obtained. (1) Since a composite electroless nickel plating layer having a high hardness is formed in the taper hole of the main shaft, dents and scratches in the taper hole are prevented. (2) The wear resistance of the ceramic sprayed layer improves the life of the spindle and stabilizes the quality. (3) By forming the main shaft itself from a low expansion material, cost can be reduced, thermal displacement can be reduced, and quality can be stabilized.
【図1】本考案の一実施例の一部軸断面図である。FIG. 1 is a partial axial sectional view of an embodiment of the present invention.
1 複合無電解ニッケルメッキ層 2 主軸 3 テーパ穴 4 ツールホルダ 5 工具 6 硬化層 7 プルスタッド 8 貫通穴 9 把持爪 10 プッシュロッド 11 軸受 12 クイル 13 主軸台 1 Composite Electroless Nickel Plating Layer 2 Spindle 3 Tapered Hole 4 Tool Holder 5 Tool 6 Hardened Layer 7 Pull Stud 8 Through Hole 9 Gripping Claw 10 Push Rod 11 Bearing 12 Quill 13 Headstock
Claims (2)
穴が、その表面に複合無電解ニッケルメッキ層を形成す
ることを特徴とする主軸テーパ穴の硬化構造。1. A hardened structure for a spindle taper hole, wherein the taper hole of the spindle into which the tool holder is inserted has a composite electroless nickel plating layer formed on the surface thereof.
なる請求項1に記載の主軸テーパ穴の硬化構造。2. The hardened structure of the spindle tapered hole according to claim 1, wherein the spindle is formed of a low thermal expansion material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2250292U JPH0574716U (en) | 1992-03-17 | 1992-03-17 | Hardened structure of spindle taper hole |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2250292U JPH0574716U (en) | 1992-03-17 | 1992-03-17 | Hardened structure of spindle taper hole |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0574716U true JPH0574716U (en) | 1993-10-12 |
Family
ID=12084525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2250292U Pending JPH0574716U (en) | 1992-03-17 | 1992-03-17 | Hardened structure of spindle taper hole |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0574716U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012513309A (en) * | 2008-12-23 | 2012-06-14 | ギューリング オッフェネ ハンデルスゲゼルシャフト | Tool system module manufacturing method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5620738B2 (en) * | 1977-10-26 | 1981-05-15 | ||
JPS6396311A (en) * | 1986-10-13 | 1988-04-27 | Agency Of Ind Science & Technol | High-speed rotary part |
-
1992
- 1992-03-17 JP JP2250292U patent/JPH0574716U/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5620738B2 (en) * | 1977-10-26 | 1981-05-15 | ||
JPS6396311A (en) * | 1986-10-13 | 1988-04-27 | Agency Of Ind Science & Technol | High-speed rotary part |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012513309A (en) * | 2008-12-23 | 2012-06-14 | ギューリング オッフェネ ハンデルスゲゼルシャフト | Tool system module manufacturing method |
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