JPH05285820A - Barrel polishing workpiece and its manufacture - Google Patents
Barrel polishing workpiece and its manufactureInfo
- Publication number
- JPH05285820A JPH05285820A JP8724692A JP8724692A JPH05285820A JP H05285820 A JPH05285820 A JP H05285820A JP 8724692 A JP8724692 A JP 8724692A JP 8724692 A JP8724692 A JP 8724692A JP H05285820 A JPH05285820 A JP H05285820A
- Authority
- JP
- Japan
- Prior art keywords
- barrel polishing
- barrel
- workpiece
- surface roughness
- polishing
- 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
- 238000005498 polishing Methods 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 230000003746 surface roughness Effects 0.000 claims abstract description 42
- 238000005121 nitriding Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 abstract description 22
- 230000007423 decrease Effects 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000005219 brazing Methods 0.000 abstract 1
- 230000008774 maternal effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 21
- 239000000498 cooling water Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000007730 finishing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001337 iron nitride Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 101150000971 SUS3 gene Proteins 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229940056319 ferrosoferric oxide Drugs 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、素材を機械加工により
所定の表面粗さに加工されたバレル研摩工作物およびそ
の製造方法に係り、特に、バレル研摩加工により仕上げ
加工が施された、例えば小径の工作物に好適なバレル研
摩工作物およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrel-polished workpiece in which a material is machined into a predetermined surface roughness and a method for producing the same, and more particularly to a barrel-polished workpiece which is finished by barrel polishing. The present invention relates to a barrel-polished workpiece suitable for a small-diameter workpiece and a manufacturing method thereof.
【0002】[0002]
【従来の技術】一般に、素材に対して機械加工を施すと
ともに、バレル研摩によりその加工面の仕上げ程度を所
定の表面粗さとされた小径のバレル研摩工作物が、生産
効率と経済的負担等の理由により多用されている。2. Description of the Related Art In general, a small-diameter barrel-polished workpiece, which is machined on a raw material and whose finished surface is finished to a predetermined surface roughness by barrel-polishing, generally reduces production efficiency and economical burden. It is often used for a reason.
【0003】このようなバレル研摩工作物の具体例とし
て、VTR等に用いられる固定ガイドローラとワックス
型サーモスタットに用いられる駆動ピストンとを例示し
て説明する。As a concrete example of such a barrel polishing workpiece, a fixed guide roller used in a VTR or the like and a drive piston used in a wax type thermostat will be described as an example.
【0004】まず、VTR等に用いられる固定ガイドロ
ーラについて説明する。First, a fixed guide roller used in a VTR or the like will be described.
【0005】一般に、VTR等に用いられる磁気テープ
の走行系の構成部品には、磁気テープと磁気ヘッドとに
安定した接触状態を保持させるため、磁気テープに対し
て接触状態で用いられるとともに、非磁性金属により製
せられた小径のキャプスタン、固定ガイドローラ、ガイ
ドピン等が用いられている。そして、特に、固定ガイド
ローラは磁気テープに対して非回転状態で接触するよう
になっており、磁気テープは固定ガイドローラの外周面
を常に所望の張力をもって摺動している。In general, the components of the running system of a magnetic tape used in a VTR or the like are used in contact with the magnetic tape in order to keep the magnetic tape and the magnetic head in stable contact with each other, and A small diameter capstan made of magnetic metal, a fixed guide roller, a guide pin, etc. are used. In particular, the fixed guide roller contacts the magnetic tape in a non-rotating state, and the magnetic tape always slides on the outer peripheral surface of the fixed guide roller with a desired tension.
【0006】前記磁気テープは配向性ポリエチレンテレ
フタレート等の樹脂フィルムをベースとしており、この
樹脂フィルムは表面の傷、摩耗、永久伸び等によって寿
命の低下をきたす。The magnetic tape is based on a resin film of oriented polyethylene terephthalate or the like, and this resin film has a shortened life due to surface scratches, abrasion, permanent elongation and the like.
【0007】したがって、固定ガイドローラは磁気テー
プと接触する摺動面を極力滑らか(表面粗さを小さく)
とする必要がある。Therefore, the fixed guide roller makes the sliding surface in contact with the magnetic tape as smooth as possible (small surface roughness).
And need to.
【0008】以下、前記固定ガイドローラについて図9
を参照してさらに説明する。The fixed guide roller will be described below with reference to FIG.
Further description will be made with reference to.
【0009】この種の従来の固定ガイドローラ1は、S
US303等のステンレス丸鋼等の素材により製せられ
ており、図9に示すように、軸方向中央部が軸方向両端
部より小径とされた略円筒形状とされている。そして、
軸方向中央部の外周面は図示しない磁気テープと接触す
る摺動面2とされている。The conventional fixed guide roller 1 of this type is S
It is made of a material such as stainless steel such as US303, and as shown in FIG. 9, it has a substantially cylindrical shape with its axial center portion having a smaller diameter than its axial end portions. And
The outer peripheral surface of the central portion in the axial direction is a sliding surface 2 that contacts a magnetic tape (not shown).
【0010】また、前記固定ガイドローラ1は、前記素
材を旋盤等の適宜な工作機械により切削加工等を施し
て、所定の形状および寸法の中間加工品を形成し、この
中間加工品の表面を滑らかにするための最終仕上げとし
てバレル研摩を施して製造されている。Further, the fixed guide roller 1 is formed by cutting the material with an appropriate machine tool such as a lathe to form an intermediate processed product having a predetermined shape and size. Manufactured by barrel polishing as the final finish for smoothness.
【0011】つぎに、ワックス型サーモスタットに用い
られる駆動ピストンについて説明する。Next, the drive piston used in the wax type thermostat will be described.
【0012】一般に、自動車等のエンジンの冷却装置と
しては、主として水冷式が多用されており、エンジンを
冷却する冷却水はラジエータにより冷却されて循環利用
されている。この冷却水の水温を所定の温度に自動的に
コントロールするための機器としてサーモスタットが、
エンジンとラジエータとの間に配置されている。このサ
ーモスタットとしては、温度によって膨張および収縮す
る一般にワックスと称される適宜な膨縮部材によりバル
ブを開閉させるワックス型のサーモスタットが主流とさ
れている。Generally, a water-cooled type is mainly used as a cooling device for an engine of an automobile or the like, and cooling water for cooling the engine is cooled by a radiator and circulated. A thermostat is a device for automatically controlling the temperature of this cooling water to a predetermined temperature.
It is located between the engine and the radiator. As this thermostat, a wax-type thermostat in which a valve is opened and closed by an appropriate expansion / contraction member generally called wax that expands and contracts depending on temperature is mainly used.
【0013】前記ワックス型サーモスタット3は、図1
0に示すように形成されている。最外側には、帯状の適
宜な素材により図中略山形に形成された第1外側部材5
aと、同様の素材により下方端部に環状の開口4aを有
するように形成された第2外側部材5bとを、径方向内
側に環状の弁座7aが形成されている弁座部材7を介し
て、相互に固着するようにして外側部材5が形成されて
いる。この外側部材5内には、軸方向の一端部に開口4
bを有する有底円筒形状の内側部材6が、互いの開口4
a,4bを相反する方向に向けるとともに、前記外側部
材5の開口4aに内側部材6が遊嵌状態で配置されてい
る。前記内側部材6の開口4b側の外周近傍には環状の
バルブ8が適宜な支持部材9に固着されて径方向外側に
向けて突設されている。また、前記弁座7aとバルブ8
とは、前記外側部材5の開口4a近傍と前記内側部材6
に配置した支持部材9との間に介在させた付勢ばね10
により、所望の付勢力で当接されている。そして、この
状態においては、第1外側部材5a側と第2外側部材5
b側とが、バルブ8を閉じることにより遮断されて、冷
却水の流路が閉状態とされている。The wax type thermostat 3 is shown in FIG.
It is formed as shown in 0. On the outermost side, a first outer member 5 formed in a substantially mountain shape in the figure by an appropriate band-shaped material
a and a second outer member 5b formed of the same material so as to have an annular opening 4a at the lower end, and a valve seat member 7 having an annular valve seat 7a formed radially inward. The outer member 5 is formed so as to be fixed to each other. The outer member 5 has an opening 4 at one end in the axial direction.
b has a bottomed cylindrical inner member 6 having openings 4
The inner members 6 are arranged in a loosely fitted state in the openings 4a of the outer member 5 while the a and 4b are oriented in opposite directions. An annular valve 8 is fixed to an appropriate support member 9 in the vicinity of the outer periphery of the inner member 6 on the side of the opening 4b so as to project radially outward. In addition, the valve seat 7a and the valve 8
Means the vicinity of the opening 4a of the outer member 5 and the inner member 6
Urging spring 10 interposed between the supporting member 9 and the supporting member 9
Are abutted with a desired biasing force. Then, in this state, the first outer member 5a side and the second outer member 5 side
The b side is shut off by closing the valve 8, and the flow path of the cooling water is closed.
【0014】また、前記内側部材6の内側には、所望の
金具11に固着されたゴム様弾性体により製せられた略
有底円筒形状のスリーブ12が、その軸心部に設けられ
た開口13を前記内側部材6の開口4bと同一方向に向
けて内装されているとともに、前記金具11は内側部材
6の開口4b近傍の内側において固着されている。ま
た、前記内側部材6の内周面14と前記スリーブ12の
外周面15との間には、所望の間隙が設けられており、
この間隙には、適宜なワックス16が密封状態で充填さ
れている。Inside the inner member 6, a sleeve 12 having a substantially bottomed cylindrical shape and made of a rubber-like elastic material fixed to a desired metal fitting 11 is provided at the center of the sleeve. 13 is installed so as to face the same direction as the opening 4b of the inner member 6, and the metal fitting 11 is fixed inside the inner member 6 near the opening 4b. A desired gap is provided between the inner peripheral surface 14 of the inner member 6 and the outer peripheral surface 15 of the sleeve 12.
An appropriate wax 16 is hermetically filled in this gap.
【0015】また、前記スリーブ12の内側には、小径
の略円柱形状に形成された駆動ピストン17がスリーブ
12に対して軸方向摺動自在に装着されており、この駆
動ピストン17の外方端は前記第1外側部材5aの内側
に形成された所定の形状の凹部18と当接されている。Inside the sleeve 12, a driving piston 17 formed in a small-diameter columnar shape is mounted so as to be slidable in the axial direction with respect to the sleeve 12, and the outer end of the driving piston 17 is mounted. Is in contact with a recess 18 having a predetermined shape formed inside the first outer member 5a.
【0016】前記ワックス型のサーモスタット3の動作
を説明すると、このワックス型のサーモスタット3は、
前記内側部材6の外周部近傍にある冷却水の水温が約7
0〜80℃になると、図11に示すように、前記ワック
ス16の体積が膨張し、前記スリーブ12を径方向内側
に向けて収縮させる。すると、スリーブ12の内側から
駆動ピストン17が排除され、結果として内側部材6が
前記外側部材5の開口4aの方向へ移動するとともに、
弁座7aよりバルブ8が離間され、図中矢印で示すよう
に、冷却水の流路が開状態とされる。The operation of the wax-type thermostat 3 will be described below.
The temperature of the cooling water near the outer peripheral portion of the inner member 6 is about 7
When the temperature becomes 0 to 80 ° C., as shown in FIG. 11, the volume of the wax 16 expands, and the sleeve 12 contracts inward in the radial direction. Then, the drive piston 17 is removed from the inside of the sleeve 12, and as a result, the inner member 6 moves toward the opening 4a of the outer member 5, and
The valve 8 is separated from the valve seat 7a, and the flow path of the cooling water is opened as shown by the arrow in the figure.
【0017】一方、冷却水の水温が約70〜80℃以下
になると、図10に示すように、前記ワックス16の体
積が収縮し、前記スリーブ12を径方向外側に向けて拡
径させる。すると、付勢ばね10の力によりスリーブ1
2内へ駆動ピストン17がもぐり込み、結果として内側
部材6が前記外側部材5の開口4aと反対側へ向かって
移動するとともに、弁座7aに対してバルブ8が当接さ
れ、冷却水の流路が閉状態とされる。On the other hand, when the temperature of the cooling water becomes about 70 to 80 ° C. or less, the volume of the wax 16 shrinks and the sleeve 12 expands radially outward, as shown in FIG. Then, the force of the biasing spring 10 causes the sleeve 1
2, the drive piston 17 slips into the inside, and as a result, the inner member 6 moves toward the side opposite to the opening 4a of the outer member 5, the valve 8 abuts against the valve seat 7a, and the flow of cooling water flows. The road is closed.
【0018】このように、駆動ピストン17とスリーブ
12とは摺動するものであるので、駆動ピストン17と
スリーブ12との摺動抵抗(摩擦抵抗)は、ワックス型
サーモスタット3の応答性に対して重要なパラメータと
なり、この摺動抵抗が小さければ小さいほど応答性が向
上し、迅速な動作をさせることができる。As described above, since the drive piston 17 and the sleeve 12 slide, the sliding resistance (friction resistance) between the drive piston 17 and the sleeve 12 depends on the responsiveness of the wax-type thermostat 3. It becomes an important parameter, and the smaller the sliding resistance, the higher the responsiveness and the quicker the operation.
【0019】したがって、駆動ピストン17はスリーブ
12と接触する摺動面19(表面)を極力滑らか(表面
粗さを小さく)とする必要がある。Therefore, it is necessary for the drive piston 17 to make the sliding surface 19 (surface) in contact with the sleeve 12 as smooth as possible (the surface roughness is small).
【0020】以下、前記駆動ピストン17について図1
2を参照してさらに説明する。Hereinafter, the drive piston 17 will be described with reference to FIG.
Further description will be given with reference to FIG.
【0021】この種の従来の駆動ピストン17は、SU
S304等のステンレス丸鋼等の素材により製せられて
おり、図12のaに示すように、旋盤等の適宜な加工装
置によって略円柱形状に切削加工を施された後に、図1
2のbに示すように、軸方向両端部に丸みを形成させる
ための粗・中バレル研摩を施されている。そして、図1
2のcに示すように、真円度並びに外径寸法の精度を向
上させるためのセンタレス研摩を施した後に、図12の
dに示すように、表面を滑らかにするための最終仕上げ
としてバレル研摩が施されている。A conventional drive piston 17 of this type is SU
It is made of a material such as S304 such as stainless round steel, and as shown in FIG. 12A, after being cut into a substantially cylindrical shape by an appropriate processing device such as a lathe,
As shown in 2b), both ends in the axial direction are subjected to rough / medium barrel polishing for forming roundness. And FIG.
As shown in 2c, after performing centerless polishing for improving the roundness and accuracy of the outer diameter dimension, barrel polishing is performed as a final finish for smoothing the surface as shown in d of FIG. Has been applied.
【0022】[0022]
【発明が解決しようとする課題】しかしながら、前述し
た従来の固定ガイドローラ1においては、軸方向両端の
外径寸法が軸方向中央部に形成された摺動面2の外径寸
法より大径とされているために、センタレス研摩、スパ
ーフィニッシュ等の加工方法を用いることができず、バ
レル研摩により、その摺動面の表面粗さを小さくさせざ
るを得ず、このバレル研摩による表面粗さは、バレル加
工の時間を長くしてもRmax1.0μm以下とするこ
とができないという問題点があった。However, in the above-mentioned conventional fixed guide roller 1, the outer diameter of both axial ends is larger than the outer diameter of the sliding surface 2 formed at the central portion in the axial direction. Therefore, processing methods such as centerless polishing and spar finish cannot be used, and the surface roughness of the sliding surface must be reduced by barrel polishing. However, there is a problem in that even if the barrel processing time is lengthened, the Rmax cannot be set to 1.0 μm or less.
【0023】また、前述した従来の駆動ピストン17に
おいては、センタレス研摩、スパーフィニッシュ等の装
置を用いた加工方法により摺動面19の表面粗さをRm
ax1.0μm以下とすることができるものの、このよ
うな装置により製せられる工作物を大量に製造するに
は、極めて多量の装置と場所が必要となり、生産効率が
悪く、経済的負担が増加するという問題点があった。Further, in the above-mentioned conventional drive piston 17, the surface roughness of the sliding surface 19 is Rm by a processing method using a device such as centerless polishing and spar finish.
Although the ax can be set to 1.0 μm or less, an extremely large amount of equipment and space are required to produce a large number of workpieces produced by such an apparatus, resulting in poor production efficiency and increased economic burden. There was a problem.
【0024】本発明はこれらの点に鑑みてなされたもの
であり、前述した従来のものにおける問題点を克服し、
簡単な構造で、バレル研摩を施すことにより表面粗さを
小さくさせることを可能としたバレル研摩工作物および
その製造方法を提供することを目的とする。The present invention has been made in view of these points, and overcomes the above-mentioned problems of the conventional ones.
It is an object of the present invention to provide a barrel-polished workpiece and a method for manufacturing the same, which has a simple structure and can reduce the surface roughness by performing barrel polishing.
【0025】[0025]
【課題を解決するための手段】前述した目的を達成する
ため請求項1に記載の本発明のバレル研摩工作物は、バ
レル研摩を施すことにより仕上げ加工されたバレル研摩
工作物において、工作物の少なくとも表面に軟窒化処理
による硬化層を形成させた後にバレル研摩を施して、表
面粗さをRmax1.0μm以下とすることを特徴とし
ている。In order to achieve the above-mentioned object, the barrel-polished workpiece of the present invention according to claim 1 is a barrel-polished workpiece finished by barrel-polishing. At least the surface is formed with a hardened layer by soft nitriding, and then barrel polishing is performed to make the surface roughness Rmax 1.0 μm or less.
【0026】また、請求項2に記載のバレル研摩工作物
の製造方法は、工作物に軟窒化処理を施して、少なくと
も工作物の表面に硬度の高い硬化層を形成した後に、バ
レル研摩により仕上げ加工を施すことを特徴としてい
る。In the method of manufacturing a barrel-polished workpiece according to a second aspect of the present invention, the workpiece is soft-nitrided to form a hardened layer having a high hardness on at least the surface of the workpiece and then finished by barrel polishing. It is characterized by being processed.
【0027】[0027]
【作用】本発明のバレル研摩工作物を本発明のバレル研
摩工作物の製造方法にしたがって製することにより、素
材の少なくとも表面に変形を伴わずに硬度の高い硬化層
を形成した後に、バレル研摩を施すことができるので、
バレル研摩を施した加工表面の表面粗さを小さくさせ、
所定値とすることができる。The barrel polishing work of the present invention is manufactured according to the method of manufacturing a barrel polishing work of the present invention to form a hardened layer having a high hardness without deformation on at least the surface of the raw material, and then the barrel polishing is performed. Can be applied,
Reduces the surface roughness of the barrel-polished processed surface,
It can be a predetermined value.
【0028】[0028]
【実施例】以下、本発明の実施例を図1から図8につい
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
【0029】図1は本発明のバレル研摩工作物を固定ガ
イドローラに適用した実施例の要部を示す縦断面図であ
る。FIG. 1 is a longitudinal sectional view showing the main part of an embodiment in which the barrel polishing work of the present invention is applied to a fixed guide roller.
【0030】図1に示すように、本実施例の固定ガイド
ローラ20の少なくとも摺動面21を含む表面には、塩
浴軟窒化処理による硬化層22が形成されている。この
硬化層22の厚さ(深さ)は、仕上げとしてのバレル研
摩を施す前の状態において、10μm程度とすることが
望ましい。As shown in FIG. 1, a hardened layer 22 formed by salt bath nitrocarburizing is formed on at least the surface including the sliding surface 21 of the fixed guide roller 20 of this embodiment. The thickness (depth) of the hardened layer 22 is preferably about 10 μm in the state before barrel polishing for finishing is performed.
【0031】なお、この硬化層22の深さは、バレル研
摩により研磨された後の工作物の表面状態の仕様および
使用目的等により変更させることができ、特に、本実施
例に限定されるものではない。The depth of the hardened layer 22 can be changed depending on the specifications of the surface condition of the workpiece after being polished by barrel polishing and the purpose of use, and is particularly limited to this embodiment. is not.
【0032】つぎに、本実施例の固定ガイドローラ20
の製造方法を説明する。Next, the fixed guide roller 20 of the present embodiment.
The manufacturing method of will be described.
【0033】本実施例の固定ガイドローラは、SUS3
03等のステンレス丸鋼等の素材に対して、従来と同様
に、旋盤等の適宜な工作機械により切削加工等を施し
て、所望の形状および寸法の第1中間加工品を形成す
る。そして、この第1中間加工品に対して、中バレル研
摩を約5時間施して、図2に示すような、第2中間加工
品23を形成する。さらに、この第2中間加工品23に
どぶ付け等の方法で塩浴軟窒化処理を施すことにより硬
化処理品を形成する。さらにまた、この硬化処理品に仕
上げ加工としてバレル研摩を施して、本実施例の固定ガ
イドローラ20の製造が完了する。The fixed guide roller of this embodiment is SUS3.
A material such as stainless round steel such as 03 is cut by a suitable machine tool such as a lathe to form a first intermediate processed product having a desired shape and size in a conventional manner. Then, the first intermediate processed product is subjected to middle barrel polishing for about 5 hours to form a second intermediate processed product 23 as shown in FIG. Further, a salt bath soft nitriding treatment is applied to the second intermediate processed product 23 by a method such as a bumping process to form a hardened product. Furthermore, barrel hardening is applied to this cured product as a finishing process to complete the manufacture of the fixed guide roller 20 of this embodiment.
【0034】つぎに、前述した本実施例の固定ガイドロ
ーラ20の製造方法において、従来例と対比させながら
作用を図3および図4により説明する。Next, the operation of the method for manufacturing the fixed guide roller 20 of the present embodiment described above will be described with reference to FIGS.
【0035】図3は塩浴軟窒化処理を施した硬化処理品
の表面からの深さと硬度との関係を示す線図であり、図
4はバレル研摩の加工時間と表面粗さとの関係を示す線
図である。FIG. 3 is a diagram showing the relationship between the depth from the surface and the hardness of the cured product subjected to the salt bath nitrocarburizing treatment, and FIG. 4 shows the relationship between the barrel polishing processing time and the surface roughness. It is a diagram.
【0036】図3に示すように、SUS303を素材と
して塩浴軟窒化処理を施した硬化処理品の表面の硬化層
の硬度は約Hmv(マイクロビッカース硬度)1200
となり、塩浴軟窒化処理(表面硬化処理)を施さない従
来の前記中間加工品の表面の硬度は、素材の硬度と同等
の約Hmv200であり、硬化処理品の表面硬度を中間
加工品の表面硬度の約6倍と飛躍的に向上させることが
できる。As shown in FIG. 3, the hardness of the hardened layer on the surface of the hardened product obtained by subjecting SUS303 to the salt bath soft nitriding treatment is about Hmv (micro Vickers hardness) 1200.
Therefore, the hardness of the surface of the conventional intermediate processed product not subjected to the salt bath nitrocarburizing treatment (surface hardening treatment) is about Hmv200, which is equivalent to the hardness of the material, and the surface hardness of the cured product is the surface of the intermediate processed product. It can be dramatically improved by about 6 times the hardness.
【0037】また、塩浴軟窒化はどぶ付け等により、第
2中間加工品23どうしが接触した状態においても、品
質を均一とさせることができ、一度に大量の製品を、簡
単に、効率よく硬化処理することができる。他のガス窒
化、イオン窒化では、第2中間加工品23の表面に必ず
ガスが接触するように、第2中間加工品23が他のもの
と接触しないように配置した上で硬化処理を行わなけれ
ばならず、第2中間加工品23の配置作業に手間が係
り、生産効率が悪い。Further, the salt bath nitrocarburizing makes it possible to make the quality uniform even when the second intermediate processed products 23 are in contact with each other by rushing, so that a large number of products can be easily and efficiently processed at one time. It can be cured. In other gas nitriding or ion nitriding, the second intermediate processed product 23 must be arranged so that the gas always contacts the surface of the second intermediate processed product 23, and the second intermediate processed product 23 does not come into contact with any other material, and then the hardening treatment must be performed. Inevitably, it takes time and effort to arrange the second intermediate processed product 23, resulting in poor production efficiency.
【0038】また、塩浴軟窒化処理による表面硬化法
は、他の表面硬化法、例えば浸炭焼入れ、高周波焼入れ
等の焼入れによるものではないので、処理温度が低く、
熱処理歪が極めて小さく、硬化処理による寸法および形
状の変化を確実に防止することができる。Further, the surface hardening method by the salt bath nitrocarburizing treatment does not depend on other surface hardening methods such as carburizing quenching and induction hardening, so that the treatment temperature is low.
The heat treatment distortion is extremely small, and it is possible to reliably prevent changes in size and shape due to curing treatment.
【0039】つぎに、中バレル研摩を5時間施した第2
中間加工品23を従来品とし、この第2中間加工品23
に塩浴軟窒化を施した硬化処理品を本発明品として、仕
上げ加工であるバレル研摩を行い、加工時間と表面粗さ
との関係を調査する比較試験を行った。Next, the second barrel which was subjected to middle barrel polishing for 5 hours
This second intermediate processed product 23 is used as the intermediate processed product 23.
Using the cured product obtained by subjecting the salt bath nitrocarburizing to the product of the present invention, barrel polishing, which is a finishing process, was performed, and a comparative test was performed to investigate the relationship between the processing time and the surface roughness.
【0040】なお、前記第2中間加工品23の表面粗さ
は、約Rmax1.5μm程度であった。The surface roughness of the second intermediate processed product 23 was about Rmax 1.5 μm.
【0041】図4に前記比較試験結果を示す。この比較
試験結果は試料数10個の平均で表示してあり、この試
験結果からも明白なように、従来品はバレル研摩開始後
約1時間で表面粗さが約Rmax1.1μmとなり最小
値を示し、それ以後は、バレル研摩開始後約7時間で約
Rmax1.25μm、バレル研摩開始後約20時間で
約Rmax1.2μmとなる。これは、従来品は表面の
硬度が低い(約Hmv200)ために、バレル研摩を長
時間継続させると、表面が研磨されるとともに、バレル
研摩に用いる図示しないメディア(研摩材)による”た
たかれ”現象によって表面が凹凸となり表面粗さが一定
になるものと推考される。FIG. 4 shows the results of the comparative test. The results of this comparative test are shown as an average of 10 samples. As is clear from this test result, the surface roughness of the conventional product was about Rmax 1.1 μm about 1 hour after the start of barrel polishing, and the minimum value was After that, after about 7 hours after the start of barrel polishing, the Rmax becomes 1.25 μm and after about 20 hours after the start of barrel polishing, the Rmax becomes 1.2 μm. This is because the conventional product has a low surface hardness (about Hmv200), so that when the barrel polishing is continued for a long time, the surface is polished and is hit by a medium (abrasive material) (not shown) used for barrel polishing. It is presumed that the phenomenon causes the surface to become uneven and the surface roughness to become constant.
【0042】前記従来品に対して本発明品は、バレル研
摩開始後約1時間で約Rmax0.9μmと急激に小さ
くなり、それ以後も徐々に表面粗さが小さくなり、バレ
ル研摩開始後約7時間で約Rmax0.7μm、バレル
研摩開始後約20時間で約Rmax0.5μmと表面粗
さが継続して減少する傾向を示す。これは、本発明品の
表面の硬化層の硬度が高い(約Hmv1200)ため、
前記メディアによる”たたかれ”現象の影響を受けず、
研摩作用が継続して行われるものと推考される。In contrast to the conventional product, the product of the present invention sharply decreased to about Rmax 0.9 μm about 1 hour after the start of barrel polishing, and the surface roughness gradually decreased thereafter, and about 7 after the start of barrel polishing. The surface roughness tends to continuously decrease to about Rmax 0.7 μm in time and about Rmax 0.5 μm about 20 hours after the start of barrel polishing. This is because the hardness of the hardened layer on the surface of the product of the present invention is high (about Hmv1200),
Not affected by the "tap" phenomenon of the media,
It is assumed that the polishing action will continue.
【0043】また、軟窒化処理による硬化層22を設け
た本発明品において、バレル研摩開始後約1時間で表面
粗さが急激に小さくなるのは、軟窒化処理による硬化層
22を形成すると、本発明品の表面から約1μm程度が
化学反応により、クロム酸化物およびクロム窒化物等に
スケール化され、このスケール化されたものが簡単に脱
落するためである。よって、このスケール化はバレル研
摩による表面粗さの向上(表面粗さを小さくする)に多
大に寄与している。In the product of the present invention provided with the hardened layer 22 by the soft nitriding treatment, the surface roughness sharply decreases about 1 hour after the start of the barrel polishing. This is because about 1 μm from the surface of the product of the present invention is scaled into chromium oxide, chromium nitride and the like by a chemical reaction, and the scaled substance is easily dropped off. Therefore, this scaling greatly contributes to the improvement of the surface roughness (to reduce the surface roughness) by barrel polishing.
【0044】したがって、本実施例の固定ガイドローラ
20によれば、従来と異なり、バレル研摩により、表面
の表面粗さを極めて小さくすることができるので、図示
しない磁気テープと接触する摺動面21を極めて滑らか
にすることができる。そして、前記摺動面21と磁気テ
ープとの摺動抵抗を減少させるとともに、磁気テープの
摩耗を減少させ、磁気テープの永久伸びおよび表面の傷
の発生を確実に減少させて、磁気テープの寿命を確実に
向上させることができる。Therefore, according to the fixed guide roller 20 of the present embodiment, unlike the prior art, the surface roughness of the surface can be made extremely small by barrel polishing, so that the sliding surface 21 that comes into contact with a magnetic tape (not shown). Can be made extremely smooth. Then, the sliding resistance between the sliding surface 21 and the magnetic tape is reduced, the wear of the magnetic tape is reduced, and the permanent elongation of the magnetic tape and the occurrence of surface scratches are surely reduced, and the life of the magnetic tape is reduced. Can be surely improved.
【0045】図5は本発明のバレル研摩工作物を駆動ピ
ストンに適用した実施例の要部を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing a main part of an embodiment in which the barrel polishing workpiece of the present invention is applied to a drive piston.
【0046】図5に示すように、本実施例の駆動ピスト
ン24の少なくとも摺動面25を含む表面には、塩浴軟
窒化処理による硬化層26が形成されている。この硬化
層26の厚さ(深さ)は、仕上げとしてのバレル研摩を
施す前の状態において、10μm程度とすることが望ま
しい。As shown in FIG. 5, a hardened layer 26 formed by a salt bath nitrocarburizing treatment is formed on at least the surface including the sliding surface 25 of the drive piston 24 of this embodiment. The thickness (depth) of the hardened layer 26 is preferably about 10 μm before barrel polishing as a finish.
【0047】なお、この硬化層26の深さは、バレル研
摩により研磨された後の工作物の表面状態の仕様および
使用目的等により変更させることができ、特に、本実施
例に限定されるものではない。The depth of the hardened layer 26 can be changed according to the specifications of the surface condition of the workpiece after being polished by barrel polishing and the purpose of use, and is particularly limited to this embodiment. is not.
【0048】つぎに、本実施例の駆動ピストンの製造方
法を説明する。Next, a method of manufacturing the drive piston of this embodiment will be described.
【0049】本実施例の駆動ピストンは、約3.8mm
とされたSUS304等のステンレス丸鋼およびSS4
1等の丸鋼材の素材に対して、従来と同様に旋盤等の適
宜な工作機械により切削加工等を施して、所望の形状お
よび寸法の第1中間加工品を形成する。そして、この第
1中間加工品に対して、粗バレル研摩を約20分、中バ
レル研摩を約5時間施して、図6に示すような、第2中
間加工品27を形成する。さらに、この第2中間加工品
27にどぶ付け等の方法で塩浴軟窒化処理を施すことに
より硬化処理品を形成する。さらにまた、この硬化処理
品に仕上げ加工としてバレル研摩を施して、本実施例の
駆動ピストン24の製造が完了する。The drive piston of this embodiment has a length of about 3.8 mm.
Round stainless steel such as SUS304 and SS4
A round steel material such as No. 1 is subjected to cutting processing by an appropriate machine tool such as a lathe as in the conventional case, and a first intermediate processed product having a desired shape and size is formed. Then, the first intermediate processed product is subjected to rough barrel polishing for about 20 minutes and medium barrel polishing for about 5 hours to form a second intermediate processed product 27 as shown in FIG. Further, a salt bath soft nitriding treatment is applied to the second intermediate processed product 27 by a method such as a bumping process to form a hardened product. Furthermore, barrel hardening is applied to this cured product as a finishing process to complete the manufacture of the drive piston 24 of this embodiment.
【0050】つぎに、前述した本実施例の駆動ピストン
24の製造方法において、従来例と対比させながら作用
を図7および図8により説明する。Next, the operation of the method of manufacturing the drive piston 24 of the present embodiment described above will be described with reference to FIGS.
【0051】図7は塩浴軟窒化処理を施した硬化処理品
の表面からの深さと硬度との関係を示す線図であり、図
8はバレル研摩の加工時間と表面粗さとの関係を示す線
図である。FIG. 7 is a diagram showing the relationship between the depth from the surface and the hardness of the cured product subjected to the salt bath nitrocarburizing treatment, and FIG. 8 shows the relationship between the processing time of barrel polishing and the surface roughness. It is a diagram.
【0052】図7に示すように、SUS304を素材と
して塩浴軟窒化処理を施した硬化処理品の表面の硬化層
の硬度は約Hmv1200となり、塩浴軟窒化処理(表
面硬化処理)を施さない従来の前記中間加工品の表面の
硬度は素材の硬度と同等の約Hmv190であり、硬化
処理品の表面の硬化層の硬度を中間加工品の表面の硬度
の約6倍と飛躍的に向上させることができる。また、S
S41を素材として塩浴軟窒化処理を施した硬化処理品
の表面の硬化層の硬度は約Hmv550となり、塩浴軟
窒化処理(表面硬化処理)を施さない従来の前記中間加
工品の表面の硬度は素材の硬度と同等の約Hmv140
であり、硬化処理品の表面硬度を中間加工品の表面硬度
の約4倍と飛躍的に向上させることができる。As shown in FIG. 7, the hardness of the hardened layer on the surface of the hardened product obtained by subjecting SUS304 to the salt bath soft nitriding treatment is about Hmv1200, and the salt bath soft nitriding treatment (surface hardening treatment) is not applied. The hardness of the surface of the conventional intermediate processed product is about Hmv190, which is equivalent to the hardness of the material, and the hardness of the hardened layer on the surface of the cured product is dramatically improved to about 6 times that of the surface of the intermediate processed product. be able to. Also, S
The hardness of the hardened layer on the surface of the hardened product subjected to the salt bath soft nitriding treatment using S41 as a material is about Hmv550, and the surface hardness of the conventional intermediate processed product not subjected to the salt bath soft nitriding treatment (surface hardening treatment). Is about Hmv140, which is equivalent to the hardness of the material
Therefore, the surface hardness of the cured product can be dramatically improved to about 4 times the surface hardness of the intermediate processed product.
【0053】また、この第2中間加工品27に施される
塩浴軟窒化処理の利点は前記実施例と同様である。The advantages of the salt bath nitrocarburizing treatment applied to the second intermediate processed product 27 are the same as those in the above-mentioned embodiment.
【0054】つぎに、粗バレル研摩を約20分、中バレ
ル研摩を5時間施した第2中間加工品を従来品とし、こ
の第2中間加工品に塩浴軟窒化を施した硬化処理品を本
発明品として、仕上げ加工であるバレル研摩を行い、加
工時間と表面粗さとの関係を調査する比較試験を行っ
た。Next, the second intermediate processed product subjected to rough barrel polishing for about 20 minutes and medium barrel polishing for 5 hours was used as a conventional product, and a cured product obtained by subjecting the second intermediate processed product to salt bath nitrocarburizing was used. As a product of the present invention, barrel polishing, which is a finishing process, was performed, and a comparative test was conducted to investigate the relationship between the processing time and the surface roughness.
【0055】なお、前記第2中間加工品27の表面粗さ
は、SUS303を素材としたものは約Rmax1.5
μm程度であり、SS41を素材としたものは約Rma
x1.7μm程度であった。The surface roughness of the second intermediate processed product 27 is about Rmax1.5 for the product made of SUS303.
Approximately Rm for SS41 material
It was about 1.7 μm.
【0056】図8に前記比較試験結果を示す。この比較
試験結果は試料数10個の平均で表示してあり、この試
験結果からも明白なように、従来品はバレル研摩開始後
約1時間で表面粗さが約Rmax1.1μmとなり最小
値を示し、それ以後は、バレル研摩時間が長くなると表
面粗さが悪く(大きく)なる。これは、従来品は表面の
硬度が低い(約Hmv190)ために、バレル研摩を長
時間継続させると、表面が研磨されるとともに、バレル
研摩に用いるメディア(研摩材)による”たたかれ”現
象によって表面が凹凸となり表面粗さが一定あるいは悪
くなるものと推考される。FIG. 8 shows the results of the comparative test. The results of this comparative test are shown as an average of 10 samples. As is clear from this test result, the surface roughness of the conventional product was about Rmax 1.1 μm about 1 hour after the start of barrel polishing, and the minimum value was After that, the surface roughness becomes worse (larger) as the barrel polishing time becomes longer. This is because the conventional product has a low surface hardness (about Hmv 190), so if barrel polishing is continued for a long time, the surface will be polished and the "battering" phenomenon caused by the media (polishing material) used for barrel polishing will occur. It is assumed that the surface becomes uneven and the surface roughness becomes constant or deteriorates.
【0057】前記従来品に対してSUS304を素材と
した本発明品は、バレル研摩開始後約1時間で約Rma
x0.85μmと急激に小さくなり、それ以後も徐々に
表面粗さが小さくなり、バレル研摩開始後約7時間で約
Rmax0.6μmと表面粗さが継続して減少する傾向
を示す。これは、本発明品の表面の硬化層の硬度が高い
(約Hmv1200)ため、前記メディアによる”たた
かれ”現象の影響を受けず研摩作用が継続して行われる
ものと推考される。In contrast to the conventional product, the product of the present invention made of SUS304 is about Rma about 1 hour after the start of barrel polishing.
The surface roughness decreases sharply to 0.85 μm, and the surface roughness gradually decreases thereafter, and the surface roughness tends to continuously decrease to about Rmax 0.6 μm about 7 hours after the start of barrel polishing. It is considered that this is because the hardness of the hardened layer on the surface of the product of the present invention is high (about Hmv1200), and therefore the polishing action is continuously performed without being affected by the "battering" phenomenon of the medium.
【0058】また、SS41を素材とした本発明品は、
バレル研摩開始後約1時間で約Rmax0.95μmと
急激に小さくなり、それ以後も徐々に表面粗さが小さく
なり、バレル研摩開始後約7時間で約Rmax0.75
μmと表面粗さが継続して減少する傾向を示す。これ
は、本発明品の表面の硬化層の硬度が高い(約Hmv5
50)ため、前記メディアによる”たたかれ”現象の影
響を受けず研摩作用が継続して行われるものと推考され
る。The product of the present invention made of SS41 is
After about 1 hour from the start of barrel polishing, the Rmax suddenly decreased to 0.95 μm, and the surface roughness gradually decreased thereafter. About 7 hours after the start of barrel polishing, the Rmax became 0.75.
The surface roughness tends to decrease continuously in μm. This is because the hardness of the hardened layer on the surface of the product of the present invention is high (about Hmv5
Therefore, it is presumed that the polishing action is continued without being affected by the "striking" phenomenon of the medium.
【0059】また、軟窒化処理による硬化層26を設け
た本発明品において、バレル研摩開始後約1時間で表面
粗さが急激に小さくなるのは、軟窒化処理による硬化層
26を形成すると、本発明品の表面から約1μm程度が
化学反応により、SUS304を素材としたものはクロ
ム酸化物およびクロム窒化物等にスケール化され、この
スケール化されたものが簡単に脱落するためであり、S
S41を素材としたものは酸化鉄および窒化鉄等にスケ
ール化され、これらのスケール化されたものが簡単に脱
落するためである。よって、このスケール化はバレル研
摩による表面粗さの向上(表面粗さを小さくする)に多
大に寄与している。In the product of the present invention having the hardened layer 26 formed by the soft nitriding treatment, the surface roughness sharply decreases about 1 hour after the start of the barrel polishing. This is because about 1 μm from the surface of the product of the present invention is scaled into a chromium oxide, a chromium nitride or the like by a chemical reaction in a material made of SUS304, and the scaled material easily falls off.
This is because the material made of S41 is scaled to iron oxide, iron nitride and the like, and these scaled materials easily fall off. Therefore, this scaling greatly contributes to the improvement of the surface roughness (to reduce the surface roughness) by barrel polishing.
【0060】したがって、本実施例の駆動ピストン24
によれば、従来と異なり、バレル研摩により、表面の表
面粗さを極めて小さくすることができるので、前記スリ
ーブ12と接触する摺動面25を極めて滑らかにするこ
とができる。そして、前記摺動面25とスリーブ12と
の摺動抵抗を減少させるとともに、摩耗を減少させ、ワ
ックス型サーモスタット3の応答性を向上させて迅速な
動作をさせることができる。また、バレル研摩により表
面粗さを向上(小さく)させることができるので、生産
効率がよく、経済的負担を減少させることができる。Therefore, the drive piston 24 of this embodiment is
According to the method, unlike the prior art, the surface roughness of the surface can be made extremely small by barrel polishing, so that the sliding surface 25 that comes into contact with the sleeve 12 can be made extremely smooth. Then, the sliding resistance between the sliding surface 25 and the sleeve 12 can be reduced, wear can be reduced, and the responsiveness of the wax-type thermostat 3 can be improved to allow a quick operation. Moreover, since the surface roughness can be improved (decreased) by barrel polishing, the production efficiency is good and the economical burden can be reduced.
【0061】また、SS41を素材とした駆動ピストン
24は、従来のものでは冷却水により錆が発生し、使用
不可能であったが、本発明のように塩浴窒化処理による
硬化層26を表面に形成すると、この硬化層26は窒化
鉄等が主体となり、錆にくい特性を有し、使用可能とす
ることができる。そして、この表面には四三酸化鉄等の
皮膜処理を施すことができ、この皮膜処理を施すことに
よりステンレス鋼に匹敵する防錆効果を発揮させること
ができる。さらに、SS41の素材コストは従来のSU
S304の素材コストに対して約1/5であり、塩浴窒
化処理等のコスト上昇を勘案しても、従来より経済的負
担の少ないワックス型サーモスタット3の駆動ピストン
24を提供することができる。Further, the drive piston 24 made of SS41 was unusable because rust was generated by the cooling water in the conventional one, but the hardened layer 26 formed by the salt bath nitriding treatment was used as in the present invention. When it is formed, the hardened layer 26 is mainly made of iron nitride or the like, has a characteristic of being resistant to rust, and can be used. Then, this surface can be subjected to a film treatment such as ferrosoferric oxide, and by applying this film treatment, it is possible to exhibit an anticorrosion effect comparable to that of stainless steel. Furthermore, the material cost of SS41 is the same as that of conventional SU
The drive piston 24 of the wax-type thermostat 3 can be provided which is about 1/5 of the material cost of S304 and has a lower economical burden than the conventional one, even considering the cost increase of the salt bath nitriding treatment and the like.
【0062】なお、本発明は、前記実施例に限定される
ものではなく、必要に応じて変更することができる。The present invention is not limited to the above embodiment, but can be modified as necessary.
【0063】[0063]
【発明の効果】以上説明したように本発明のバレル研摩
工作物およびその製造方法によれば、バレル研摩による
仕上げ加工を行う前に、軟窒化処理による硬化層を工作
物の表面に形成することにより、バレル研摩による仕上
げ加工後の工作物の表面粗さを従来より小さくすること
ができるという極めて優れた効果を奏する。As described above, according to the barrel-polished workpiece and the method for manufacturing the same of the present invention, a hardened layer formed by soft nitriding is formed on the surface of the workpiece before finishing by barrel polishing. As a result, the surface roughness of the workpiece after finishing by barrel polishing can be made smaller than before, which is an extremely excellent effect.
【図1】本発明のバレル研摩工作物を固定ガイドローラ
に適用した実施例の要部を示す縦断面図FIG. 1 is a longitudinal sectional view showing a main part of an embodiment in which a barrel polishing workpiece of the present invention is applied to a fixed guide roller.
【図2】固定ガイドローラの中間加工品を示す正面図FIG. 2 is a front view showing an intermediate processed product of a fixed guide roller.
【図3】固定ガイドローラの中間加工品に塩浴軟窒化を
施した硬化処理品の表面からの深さと硬度との関係を示
す線図FIG. 3 is a diagram showing the relationship between the depth from the surface and the hardness of a cured product obtained by subjecting an intermediate processed product of a fixed guide roller to salt bath nitrocarburizing.
【図4】固定ガイドローラのバレル研摩の加工時間と表
面粗さとの関係を示す線図FIG. 4 is a diagram showing the relationship between the processing time of barrel polishing of a fixed guide roller and the surface roughness.
【図5】本発明のバレル研摩工作物を駆動ピストンに適
用した実施例の要部を示す縦断面図FIG. 5 is a vertical cross-sectional view showing a main part of an embodiment in which the barrel polishing workpiece of the present invention is applied to a drive piston.
【図6】駆動ピストンの中間加工品を示す正面図FIG. 6 is a front view showing an intermediate processed product of a drive piston.
【図7】駆動ピストンの中間加工品に塩浴軟窒化を施し
た硬化処理品の表面からの深さと硬度との関係を示す線
図FIG. 7 is a diagram showing the relationship between the hardness and the depth from the surface of a cured product obtained by subjecting an intermediate processed product of a drive piston to salt bath nitrocarburizing.
【図8】駆動ピストンのバレル研摩の加工時間と表面粗
さとの関係を示す線図FIG. 8 is a diagram showing the relationship between the processing time of barrel polishing of the drive piston and the surface roughness.
【図9】従来のバレル研摩工作物を固定ガイドローラに
適用した要部を示す縦断面図FIG. 9 is a vertical cross-sectional view showing a main part in which a conventional barrel polishing workpiece is applied to a fixed guide roller.
【図10】ワックス型のサーモスタットの閉状態を示す
縦断面図FIG. 10 is a vertical sectional view showing a closed state of a wax type thermostat.
【図11】ワックス型のサーモスタットの開状態を示す
縦断面図FIG. 11 is a vertical sectional view showing an open state of a wax type thermostat.
【図12】aからdは従来のバレル研摩工作物を駆動ピ
ストンに適用した場合の製造工程を示す図12A to 12D are views showing a manufacturing process when a conventional barrel polishing workpiece is applied to a drive piston.
20 固定ガイドローラ 21 摺動面 22 硬化層 24 駆動ピストン 25 摺動面 26 硬化層 20 Fixed Guide Roller 21 Sliding Surface 22 Hardened Layer 24 Drive Piston 25 Sliding Surface 26 Hardened Layer
Claims (2)
されたバレル研摩工作物において、工作物の少なくとも
表面に軟窒化処理による硬化層を形成させた後にバレル
研摩を施して、表面粗さをRmax1.0μm以下とす
ることを特徴とするバレル研摩工作物。1. A barrel-polished workpiece finished by barrel-polishing is subjected to barrel-polishing after forming a hardened layer by a soft nitriding treatment on at least the surface of the workpiece to obtain a surface roughness of Rmax1. A barrel polishing workpiece characterized by being 0 μm or less.
も工作物の表面に硬度の高い硬化層を形成した後に、バ
レル研摩により仕上げ加工を施すことを特徴とするバレ
ル研摩工作物の製造方法。2. A method for manufacturing a barrel-polished workpiece, which comprises subjecting the workpiece to a soft nitriding treatment to form a hardened layer having a high hardness on at least the surface of the workpiece, and then finishing by barrel polishing. ..
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8724692A JPH05285820A (en) | 1992-04-08 | 1992-04-08 | Barrel polishing workpiece and its manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8724692A JPH05285820A (en) | 1992-04-08 | 1992-04-08 | Barrel polishing workpiece and its manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05285820A true JPH05285820A (en) | 1993-11-02 |
Family
ID=13909450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8724692A Pending JPH05285820A (en) | 1992-04-08 | 1992-04-08 | Barrel polishing workpiece and its manufacture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05285820A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013001953A (en) * | 2011-06-16 | 2013-01-07 | Diamet:Kk | Method for manufacturing sintered alloy |
JP2013542858A (en) * | 2010-08-19 | 2013-11-28 | フェストアルピネ シュタール ゲーエムベーハー | Surface finishing method for hardened and corrosion-resistant steel plate members |
-
1992
- 1992-04-08 JP JP8724692A patent/JPH05285820A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013542858A (en) * | 2010-08-19 | 2013-11-28 | フェストアルピネ シュタール ゲーエムベーハー | Surface finishing method for hardened and corrosion-resistant steel plate members |
JP2013001953A (en) * | 2011-06-16 | 2013-01-07 | Diamet:Kk | Method for manufacturing sintered alloy |
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