JP3466976B2 - Method for crowning a sliding member and apparatus used for the method - Google Patents

Method for crowning a sliding member and apparatus used for the method

Info

Publication number
JP3466976B2
JP3466976B2 JP31512499A JP31512499A JP3466976B2 JP 3466976 B2 JP3466976 B2 JP 3466976B2 JP 31512499 A JP31512499 A JP 31512499A JP 31512499 A JP31512499 A JP 31512499A JP 3466976 B2 JP3466976 B2 JP 3466976B2
Authority
JP
Japan
Prior art keywords
sliding
axis
polishing
sliding member
crowning
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 - Fee Related
Application number
JP31512499A
Other languages
Japanese (ja)
Other versions
JP2001129751A (en
Inventor
洋二 大西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Motors Ltd
Original Assignee
Kawasaki Jukogyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Jukogyo KK filed Critical Kawasaki Jukogyo KK
Priority to JP31512499A priority Critical patent/JP3466976B2/en
Publication of JP2001129751A publication Critical patent/JP2001129751A/en
Application granted granted Critical
Publication of JP3466976B2 publication Critical patent/JP3466976B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、エンジンの弁装置
に用いられるタペットのような摺動部材の摺動面を滑ら
かに湾曲した凸面状に形成するクラウニング加工方法と
これに用いる装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crowning method for forming a sliding surface of a sliding member such as a tappet used in an engine valve device into a smoothly curved convex surface, and an apparatus used therefor. is there.

【0002】[0002]

【従来の技術および発明が解決しようとする課題】例え
ば4サイクルエンジンにおけるカムと接するタペットの
摺動面は、中央部が外周部よりも高い湾曲した凸状面と
なるようにクラウニング加工を施している。このような
凸状面を形成すれば、運転中にカムの回転駆動に伴いタ
ペットがその軸心回りに回転するので、タペットの摺動
面の偏摩耗を防止できる。このクラウニング加工を行う
にあたって、従来では、旋盤を用いたり、平面砥石また
は線形砥石を用いている。しかし、このような従来の方
法では、滑らかな凸状面を形成するのに熟練を要する。
2. Description of the Related Art For example, a sliding surface of a tappet, which is in contact with a cam in a four-cycle engine, is crowned so that a central portion thereof has a curved convex surface higher than an outer peripheral portion thereof. There is. If such a convex surface is formed, the tappet rotates around its axis along with the rotational driving of the cam during operation, so uneven wear of the sliding surface of the tappet can be prevented. Conventionally, a lathe, a flat grindstone, or a linear grindstone is used to perform the crowning process. However, such a conventional method requires skill to form a smooth convex surface.

【0003】そこで本発明の目的は、熟練を要すること
なく、滑らかな凸状面を形成することができるクラウニ
ング加工方法とこれに用いる装置を提供することにあ
る。なお、関連技術を示す例として実開昭63−267
03号がある。
Therefore, an object of the present invention is to provide a crowning method capable of forming a smooth convex surface without requiring skill and an apparatus used therefor. In addition, as an example showing a related technique
There is No. 03.

【0004】[0004]

【課題を解決するための手段】上記目的を達成するた
め、請求項1記載のクラウニング加工方法は、回転する
研磨材の前面となる一側端面が他側端面寄りの回転軸心
上に頂点を持つ円錐面からなる研磨面に摺動部材を、
その軸心回りに回転させながら、軸心が前記円錐面と直
交する姿勢で押し付けて摺動面を形成する。
In order to achieve the above object, the crowning method according to claim 1 is such that the one end face which is the front face of the rotating abrasive material has its rotation axis centered on the other end face.
A sliding member is attached to the polishing surface consisting of a conical surface with an apex on top .
While rotating about the axis, the axis is pressed in a posture orthogonal to the conical surface to form a sliding surface.

【0005】請求項2記載のクラウニング加工装置は、
前面となる一側端面が他側端面寄りに頂点を持つ円錐面
からなる研磨面を有し、研磨面の軸心回りに回転する研
磨材と、前記研磨面に摺動部材を、その軸心回りに回転
させながら、軸心が前記円錐面と直交する姿勢で押し付
けて摺動面を形成させる回転押圧機とを備えている。
A crowning apparatus according to claim 2 is
An abrasive having a conical surface whose one end face as the front surface has a vertex near the other end face , and an abrasive that rotates around the axis of the polishing surface, and a sliding member on the polishing surface A rotary pressing machine that presses in a posture in which the axis is orthogonal to the conical surface while rotating around to form a sliding surface.

【0006】クラウニング加工時に、摺動部材は、その
摺動面が研磨材の前面となる一側端面が他側端面寄り
に頂点を持つ円錐面からなる研磨面に、これと直交する
姿勢で押し付けられる。これにより、研磨面である円錐
面と接触する摺動面の外周部位が、回転する円錐面によ
り研削される。このとき、摺動部材は回転するので、前
記円錐面と接触する摺動面が、湾曲した円錐面により、
滑らかな凸状で、かつ軸対称形に研削される。
During the crowning process, the sliding surface of the sliding member is such that the one end surface serving as the front surface of the abrasive is closer to the other end surface.
It is pressed against a polishing surface consisting of a conical surface having an apex at a position orthogonal to this. As a result, the outer peripheral portion of the sliding surface that contacts the conical surface that is the polishing surface is ground by the rotating conical surface. At this time, since the sliding member rotates, the sliding surface in contact with the conical surface is a curved conical surface,
It has a smooth convex shape and is ground to be axisymmetric.

【0007】[0007]

【発明の実施の形態】以下、本発明の好ましい実施形態
について図面を参照しながら説明する。図1は、本発明
にかかるクラウニング加工装置の概略的な側面図であ
る。この装置は、研磨材1を設けた研削盤2と、研磨材
1の研磨面11にタペット(摺動部材)3を回転させな
がら押し付けて、その頂面に湾曲した凸面状の摺動面3
1を形成させる回転押圧機4を備えている。
Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a crowning device according to the present invention. This apparatus comprises a grinder 2 provided with an abrasive material 1, and a tappet (sliding member) 3 that is pressed against a polishing surface 11 of the abrasive material 1 while rotating the same, and a convex sliding surface 3 having a curved top surface.
1 is provided with a rotary pressing machine 4.

【0008】前記研削盤2は、研磨材1を焼き付け手段
などにより固着したベース部材21と、これから突設し
た回転軸22を把持するチャック23と、このチャック
23から延びて軸受26で支持されたチャック軸24を
回転させるモータ25を備えている。また、前記研磨材
1は、中心に開口10を有する筒状に形成され、その前
面となる一側端面1aには研磨材1の軸心C1と同心
で、かつ研磨材1の他側端面1b寄りに頂点Pを持つ円
錐面からなる研磨面11を形成している。このように研
磨面11を円錐面とすれば、その母線11aが直線であ
るから、ダイヤモンドバイトなどを用いて、前記研磨面
11のドレッシングを容易に行える。
The grinding machine 2 is supported by a base member 21 to which the abrasive material 1 is fixed by a baking means, a chuck 23 for holding a rotary shaft 22 projecting therefrom, and a bearing 26 extending from the chuck 23. A motor 25 for rotating the chuck shaft 24 is provided. Further, the abrasive 1 is formed in a cylindrical shape having an opening 10 in the center, and one end face 1a which is the front face thereof is concentric with the axis C1 of the abrasive 1 and the other end face 1b of the abrasive 1 is formed. A polishing surface 11 formed of a conical surface having an apex P is formed near the edge. When the polishing surface 11 is thus a conical surface, the generatrix 11a is a straight line, so that the polishing surface 11 can be easily dressed using a diamond cutting tool or the like.

【0009】前記回転押圧機4は、タペット3を把持す
るチャック41と、このチャック41から延びるチャッ
ク軸42を回転させるモータ43と、これら全体をチャ
ック軸42と平行に研磨面11側に移動させるボールネ
ジのような送り手段44を備えている。この回転押圧機
4は、前記研磨面11と直交する方向に傾けて配置され
ており、その全体を移動させて前記タペット3を研磨面
11に押し付けるとき、タペット3はその軸心C2が研
磨面11に対して直交する方向に押し付けられる。研磨
面11の幅Wは、タペット3の摺動面31の直径φdよ
りも大きく設定されている。前記タペット3は、図2の
概略正面図に示す研磨材1の回転方向R1と同方向R2
または逆方向R3のいずれの方向に回転させても良い。
The rotary pressing machine 4 holds a chuck 41 that holds the tappet 3, a motor 43 that rotates a chuck shaft 42 extending from the chuck 41, and moves the whole of them to the polishing surface 11 side in parallel with the chuck shaft 42. The feeding means 44 such as a ball screw is provided. The rotary pressing machine 4 is disposed so as to be inclined in a direction orthogonal to the polishing surface 11, and when the tappet 3 is pressed against the polishing surface 11 by moving the whole, the tappet 3 has its axis C2 as the polishing surface. It is pressed in a direction orthogonal to 11. The width W of the polishing surface 11 is set larger than the diameter φd of the sliding surface 31 of the tappet 3. The tappet 3 is rotated in the same direction R2 as the rotation direction R1 of the abrasive 1 shown in the schematic front view of FIG.
Alternatively, it may be rotated in any direction of the reverse direction R3.

【0010】次に、以上の装置によりタペット3をクラ
ウニング加工するときの手順について説明する。先ず、
図1の研削盤2のモータ25で研磨材1を回転させ、ま
た回転押圧機4のモータ43によりタペット3を回転さ
せながら、この回転押圧機4の全体を送り手段44によ
り研磨材1側に移動させる。こうして、研磨材1の円錐
面からなる研磨面11に、この面と直交する姿勢でタペ
ット頂部の摺動面31を押し付ける。タペット3の摺動
面31となる頂面は、研磨前であるから、湾曲していな
い平坦面である。したがって、図2に示すタペット3の
軸心C2と直交する摺動面31の左右外周部位a,b
が、図3に示すように、研磨面11の円錐面と接触し、
この外周部位a,bが回転する研磨面11により研削さ
れる。このとき、タペット3は回転押圧機4により回転
されるので、前記円錐面からなる研磨面11と接触する
摺動面31の外周部位a,bが、全周にわたって均一に
研削される。
Next, a procedure for crowning the tappet 3 with the above apparatus will be described. First,
While the abrasive 25 is rotated by the motor 25 of the grinder 2 shown in FIG. 1 and the tappet 3 is rotated by the motor 43 of the rotary press 4, the entire rotary press 4 is moved to the abrasive 1 side by the feeding means 44. To move. In this way, the sliding surface 31 of the top of the tappet is pressed against the conical polishing surface 11 of the polishing material 1 in a posture orthogonal to this surface. The top surface, which is the sliding surface 31 of the tappet 3, is a flat surface that is not curved because it is not ground. Therefore, the left and right outer peripheral parts a and b of the sliding surface 31 orthogonal to the axis C2 of the tappet 3 shown in FIG.
, As shown in FIG. 3, comes into contact with the conical surface of the polishing surface 11,
The outer peripheral parts a and b are ground by the rotating polishing surface 11. At this time, since the tappet 3 is rotated by the rotary pressing machine 4, the outer peripheral portions a and b of the sliding surface 31 that comes into contact with the polishing surface 11 formed of the conical surface are uniformly ground over the entire circumference.

【0011】このように、タペット3の摺動面31を研
磨面11に押し付けながら研削作業を続けることによ
り、摺動面31が外周部位から中心側へと順次研削され
て、最終的には、図4のように、中央部分が高くて外周
部分が低い、滑らかに湾曲した凸面状の摺動面31が形
成される。この摺動面31は、軸心C2の回りに軸対称
な形状である。
In this way, by continuing the grinding work while pressing the sliding surface 31 of the tappet 3 against the polishing surface 11, the sliding surface 31 is sequentially ground from the outer peripheral portion to the center side, and finally, As shown in FIG. 4, a smoothly curved convex sliding surface 31 having a high central portion and a low outer peripheral portion is formed. The sliding surface 31 has an axially symmetrical shape around the axis C2.

【0012】このような研削作業時に、研磨材1は通常
カーボンスチールで形成されているので、研磨面11と
摺動面31の摩擦抵抗により火花が発生する。タペット
3が所定量送られて、摺動面31が正確に研削された後
には、前記摩擦抵抗が小となって火花の発生が停止する
ので、これを確認して研削作業を終了する。このよう
に、研磨材1の研磨面11に、これと直交する方向にタ
ペット3を押し付けるだけであるから、熟練を要するこ
となく容易に、滑らかな摺動面31の研削が行える。
During such a grinding operation, since the abrasive 1 is usually made of carbon steel, sparks are generated due to the frictional resistance between the abrasive surface 11 and the sliding surface 31. After the tappet 3 has been fed by a predetermined amount and the sliding surface 31 has been accurately ground, the frictional resistance becomes small and the generation of sparks stops, so that this is confirmed and the grinding operation ends. As described above, since the tappet 3 is merely pressed against the polishing surface 11 of the polishing material 1 in the direction orthogonal to the polishing surface 11, the smooth sliding surface 31 can be easily ground without requiring skill.

【0013】このとき、例えば図1に示すように、研磨
材1における摺動面31の軸心C2と交わる位置の直径
φDが400mm、摺動面31の直径φdが26mmで
ある場合、この摺動面31に形成するクラウニング量
(図4に示す中心と周縁の高さの差)eが5×10-3
m(5μm)、つまり、クラウニング比=5×10-3
26の湾曲面を有する摺動面31を形成するには、研磨
材1における研磨面11の母線11aの、軸心C1と直
交する面に対する傾斜角度θを約1°とすれば良い。
At this time, for example, as shown in FIG. 1, when the diameter φD of the position where the sliding surface 31 of the abrasive 1 intersects the axis C2 is 400 mm and the diameter φd of the sliding surface 31 is 26 mm, this sliding The amount of crowning formed on the moving surface 31 (difference in height between the center and the peripheral edge shown in FIG. 4) e is 5 × 10 −3 m
m (5 μm), that is, the crowning ratio = 5 × 10 −3 /
In order to form the sliding surface 31 having 26 curved surfaces, the inclination angle θ of the generatrix 11a of the polishing surface 11 of the polishing material 1 with respect to the surface orthogonal to the axis C1 may be set to about 1 °.

【0014】なお、以上の実施形態ではタペットについ
て説明したが、本発明は、これ以外にも、湾曲した凸状
頂面を有するバルブリフター、ロッカーアーム等の摺動
部材のクラウニング加工にも適用できる。
Although the tappet has been described in the above embodiments, the present invention is also applicable to the crowning process of sliding members such as valve lifters and rocker arms having a curved convex top surface. .

【0015】[0015]

【発明の効果】以上のように、本発明によれば、熟練を
要することなく、摺動部材の摺動面に滑らかな凸状面を
形成することができる。
As described above, according to the present invention, a smooth convex surface can be formed on the sliding surface of the sliding member without requiring skill.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施形態に係るクラウニング装置を
概略的に示す側面図である。
FIG. 1 is a side view schematically showing a crowning device according to an embodiment of the present invention.

【図2】同装置を示す概略正面図である。FIG. 2 is a schematic front view showing the device.

【図3】図2のIII−III線断面図で、研磨作業初期の状
態を示す。
FIG. 3 is a sectional view taken along the line III-III in FIG. 2, showing a state at the initial stage of polishing work.

【図4】研磨作業の終了状態を示す図3に対応した断面
図である。
FIG. 4 is a cross-sectional view corresponding to FIG. 3, showing a finished state of a polishing operation.

【符号の説明】[Explanation of symbols]

1…研磨材、2…研削盤、11…研磨面、3…摺動部材
(タペット)、31…摺動面、4…回転押圧機、C1…
研磨面の軸心、C2…摺動部材の軸心
DESCRIPTION OF SYMBOLS 1 ... Abrasive material, 2 ... Grinding machine, 11 ... Polishing surface, 3 ... Sliding member (tapet), 31 ... Sliding surface, 4 ... Rotary pressing machine, C1 ...
Polishing surface axis, C2 ... Sliding member axis

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 摺動部材の摺動面を滑らかに湾曲した凸
状面に形成する方法であって、 回転する研磨材の前面となる一側端面が他側端面寄りの
回転軸心上に頂点を持つ円錐面からなる研磨面に、前記
摺動部材を、その軸心回りに回転させながら、軸心が前
記円錐面と直交する姿勢で押し付けて、摺動面を形成す
る摺動部材のクラウニング加工方法。
1. A method for forming a sliding surface of a sliding member into a smoothly curved convex surface, wherein one end face which is a front face of a rotating abrasive material is closer to the other end face.
A sliding surface is formed by pressing the sliding member around a conical surface having an apex on the axis of rotation while rotating the sliding member around the axis while the axis is perpendicular to the conical surface. A method for crowning a sliding member.
【請求項2】 摺動部材の摺動面を滑らかに湾曲した凸
状面に形成する装置であって、前面となる一側端面が他側端面寄りに頂点を持つ 円錐面
からなる研磨面を有し、研磨面の軸心回りに回転する研
磨材と、 前記研磨面に前記摺動部材を、その軸心回りに回転させ
ながら、軸心が前記円錐面と直交する姿勢で押し付けて
摺動面を形成させる回転押圧機とを備えたクラウニング
加工装置。
2. A device for forming a sliding surface of a sliding member into a smoothly curved convex surface, wherein a polishing surface is formed by a conical surface whose one end face serving as a front face has an apex toward the other end face. And a polishing material that rotates about the axis of the polishing surface, and slides the sliding member on the polishing surface while pressing it around the axis while pressing the axis in a posture orthogonal to the conical surface. A crowning device having a rotary pressing machine for forming a surface.
JP31512499A 1999-11-05 1999-11-05 Method for crowning a sliding member and apparatus used for the method Expired - Fee Related JP3466976B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31512499A JP3466976B2 (en) 1999-11-05 1999-11-05 Method for crowning a sliding member and apparatus used for the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31512499A JP3466976B2 (en) 1999-11-05 1999-11-05 Method for crowning a sliding member and apparatus used for the method

Publications (2)

Publication Number Publication Date
JP2001129751A JP2001129751A (en) 2001-05-15
JP3466976B2 true JP3466976B2 (en) 2003-11-17

Family

ID=18061704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31512499A Expired - Fee Related JP3466976B2 (en) 1999-11-05 1999-11-05 Method for crowning a sliding member and apparatus used for the method

Country Status (1)

Country Link
JP (1) JP3466976B2 (en)

Also Published As

Publication number Publication date
JP2001129751A (en) 2001-05-15

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