JPS624424Y2 - - Google Patents
Info
- Publication number
- JPS624424Y2 JPS624424Y2 JP12300983U JP12300983U JPS624424Y2 JP S624424 Y2 JPS624424 Y2 JP S624424Y2 JP 12300983 U JP12300983 U JP 12300983U JP 12300983 U JP12300983 U JP 12300983U JP S624424 Y2 JPS624424 Y2 JP S624424Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- processing machine
- support member
- main body
- cylinder
- 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
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 230000035939 shock Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 2
- 238000013459 approach Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001595 contractor effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Landscapes
- Milling Processes (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Description
【考案の詳細な説明】
(従来分野)
本考案は、加工機における油圧緩衝器、特に、
加工機本体と刃具支持機構との間に挿設される加
工機用の油圧緩衝装置に関する。[Detailed description of the invention] (Conventional field) The present invention relates to a hydraulic shock absorber for a processing machine, in particular,
The present invention relates to a hydraulic shock absorber for a processing machine that is inserted between a processing machine main body and a cutting tool support mechanism.
(従来技術)
内燃機関のシリンダヘツドにおけるバルブシー
トのシート面は、一般に高い真円性とバルブガイ
ドのステム穴に対する同心性とが要求され、この
要求を実現するための加工手段については従来よ
り種々提案されていて、本件出願人も特願昭56−
31937号及び特願昭56−51162号等において第1図
イに見られるような加工装置を提案してきてい
る。(Prior Art) The seat surface of the valve seat in the cylinder head of an internal combustion engine is generally required to have high roundness and concentricity with the stem hole of the valve guide, and various processing methods have been used to achieve this requirement. The applicant has also filed a patent application in 1982.
31937 and Japanese Patent Application No. 56-51162, etc., a processing device as shown in FIG. 1A has been proposed.
この装置は、中心部にバルブガイドgのステム
穴を仕上げるためのリーマ1を備え、中央部外周
にはバルブシートVsを加工するカツタなどの刃
物cを備えた刃物ホルダaをスピンドルsに自在
継手jなどを介して屈折自在に連結し、他方、多
軸頭Hから前方に張出したガイドバーGには、リ
ング状のサポートプレートPを摺動可能に吊持
し、このサポートプレートPの前面には、放射方
向に進退動し刃物ホルダaの周面に当接してその
状態を保つようにロツクされる3個以上のサポー
トピンbを備えたサポート筒dを配設し、加工に
当つては、スピンドルsを回転させながら多軸頭
Hを前進させてリーマ1をバルブガイドgのステ
ム穴に挿入し、同図ロに示すようにリーマ1をス
テム穴位置に適合させながら進行させ、リーマ1
が充分にステム穴に倣い終つた時点で、刃物ホル
ダaの周面に当接した複数のサポートピンbのそ
れぞれを油圧によりその状態でロツクし、かくて
刃物cの前後をバルブガイドgとサポートピンb
とで軸支状態となして真円性とステム穴に対する
同心性を維持しつつ刃物cによりバルブシート
Vsを加工するようにされ、また、バルブシート
Vsに対する所定の加工を終えて、多軸筒Hが後
退動作に移ると、図示しない油圧回路機構が応動
し、サポートピンbの背面に位置する油室を開放
してサポートピンbを外方に移動させ、刃物ホル
ダaに対する支持状態を解いて刃物cの後方へ移
動できるようにしている。 This device is equipped with a reamer 1 in the center for finishing the stem hole of a valve guide g, and a blade holder a equipped with a cutter c such as a cutter for machining a valve seat Vs on the outer periphery of the center, and a universal joint attached to a spindle s. On the other hand, a ring-shaped support plate P is slidably suspended from a guide bar G extending forward from a multi-axis head H. is provided with a support cylinder d equipped with three or more support pins b that move back and forth in the radial direction and are locked in contact with the circumferential surface of the blade holder a to maintain that state. , insert the reamer 1 into the stem hole of the valve guide g by advancing the multi-axis head H while rotating the spindle s, and move the reamer 1 while adjusting it to the stem hole position as shown in FIG.
When the blade has sufficiently followed the stem hole, each of the plurality of support pins b in contact with the circumferential surface of the blade holder a is locked in that state by hydraulic pressure, and the front and rear of the blade c are connected to the valve guide g and supported. pin b
While maintaining the roundness and concentricity with the stem hole, the valve seat is fixed with the cutter c.
Vs is made to be machined and also the valve seat
When the multi-axis cylinder H moves backward after completing the predetermined machining for Vs, a hydraulic circuit mechanism (not shown) responds to open the oil chamber located on the back of the support pin b and move the support pin b outward. The blade is moved to release the state of support from the blade holder a so that the blade can be moved to the rear of the blade c.
ところがこのような構造では、刃物cの外径と
刃物ホルダaの外径との間に差があまりないよう
な場合、加工時間を短縮すべく加工後に加工機本
体を急速に後退させると、バルブガイドgの軸線
に沿つて後退した刃物cが、油圧を解かれて緩や
かに後退動するサポートピンbと接触することに
なつて、互いに損傷をきたすといつた不具合が生
じる。 However, with such a structure, if there is not much difference between the outer diameter of the cutter c and the outer diameter of the cutter holder a, if the processing machine body is rapidly retreated after processing to shorten the processing time, the valve The blade c, which has retreated along the axis of the guide g, comes into contact with the support pin b, which is released from hydraulic pressure and moves slowly backward, resulting in mutual damage.
(目的)
本考案は、このような問題を解消すべくなされ
たもので、その目的とするところは、加工機本体
の移動初期においては本体と支持部材との相対的
移動を少なくすることにより、支持部材が刃物ホ
ルダ等を開放するに要する時間を稼ぎ、もつて装
置を損傷させることなく加工機本体を高速で後退
させることのできる新たな油圧緩衝器を提供する
ことにある。(Purpose) The present invention was made to solve such problems, and its purpose is to reduce the relative movement between the main body and the support member at the beginning of the movement of the processing machine main body. It is an object of the present invention to provide a new hydraulic shock absorber capable of buying time required for a support member to release a cutter holder, etc., and capable of retracting a processing machine main body at high speed without damaging the device.
(構成)
そこで、以下に本考案の詳細を図示した実施例
に基づいて説明する。(Structure) Therefore, details of the present invention will be described below based on illustrated embodiments.
第2図は、内燃機関のバルブシート面の加工装
置に施された本考案装置の概要を、第3、4図
は、その詳細をそれぞれ示している。 FIG. 2 shows an outline of the device of the present invention applied to a processing device for a valve seat surface of an internal combustion engine, and FIGS. 3 and 4 show its details, respectively.
図において、符号1、2は、サポートプレート
Pの中央部に取付けられた油室を構成する前後の
シリンダで、ワーク側に位置する前部シリンダ1
は、その内径が後述するピストン5の外径とほぼ
等しいかわずかに大きく形成され、また、多軸頭
H(加工機本体)側に位置する後方のシリンダ2
は、前部シリンダ1のそれより幾分大きな内径を
有するように形成されている。そして、これら両
シリンダ1、2によつて境界部に段部を有し、か
つ全長が多軸頭Hのストロークより長く形成され
たシリンダ内には、一端が多軸頭Hに固定された
ロツド3が貫通し、さらにこのロツド3には、多
軸頭Hが加工位置へ前進したときピストン5が前
部シリンダ1の最前部に位置するように取付けら
れている。 In the figure, numerals 1 and 2 are the front and rear cylinders that constitute the oil chamber attached to the center of the support plate P, and the front cylinder 1 is located on the work side.
is formed so that its inner diameter is approximately equal to or slightly larger than the outer diameter of the piston 5, which will be described later, and the rear cylinder 2 is located on the multi-axis head H (processing machine main body) side.
is formed to have an inner diameter somewhat larger than that of the front cylinder 1. Inside the cylinder, which has a step at the boundary between these two cylinders 1 and 2 and whose overall length is longer than the stroke of the multi-axis head H, is a rod whose one end is fixed to the multi-axis head H. 3 passes through the rod 3, and a piston 5 is attached to the rod 3 so as to be located at the forefront of the front cylinder 1 when the multi-axis head H advances to the machining position.
このピストン5は、シリンダ1、2とともにダ
ツシユポツトとしての機能、つまり加工位置への
移動の際は小さな抵抗が、後退動の際には大きな
抵抗がかかるように構成されている。すなわち、
この実施例では、周囲に多数の孔52……を有す
るピストン本体51をロツド3に固定するととも
に、このピストン本体51の後面、つまり多軸頭
Hの面に、ピストン本体51の孔52……を塞ぐ
ようにしてオリフイス54を有するリング状のチ
エツクバルブ53を当接した上、これをロツクナ
ツト56によつて支持したウエーブワツシヤ55
により押圧するようにして、多軸頭Hが加工位置
へ向けて前進動する場合には、ピストン5の前方
にある液体がピストン本体51の孔52を経てピ
ストン本体51とチエツクバルブ53の間から抵
抗なくピストン5の後方へ流出し、多軸頭Hが後
退動する場合には、ピストン5の後方にある液体
がチエツクバルブ53に設けたオリフイス54に
より縮流作用を受けつつピストン本体51の孔5
2を経てピストン5の前方へ流出するようにし
て、多軸頭Hが前進動する際には小さな抵抗を、
後退動する際には大きな抵抗を付与するように構
成されている。 This piston 5, together with the cylinders 1 and 2, functions as a doss pot, that is, it is constructed so that it encounters a small resistance when moving to a processing position and a large resistance when moving backward. That is,
In this embodiment, a piston body 51 having a large number of holes 52 around its periphery is fixed to the rod 3, and the holes 52... A wave washer 55 abuts against a ring-shaped check valve 53 having an orifice 54 so as to close it, and is supported by a lock nut 56.
When the multi-axis head H moves forward toward the machining position, the liquid in front of the piston 5 passes through the hole 52 in the piston body 51 and flows out from between the piston body 51 and the check valve 53. When the liquid flows out to the rear of the piston 5 without resistance and the multi-axis head H moves backward, the liquid at the rear of the piston 5 is subjected to a flow contraction effect by the orifice 54 provided in the check valve 53 and flows through the hole in the piston body 51. 5
2 to the front of the piston 5 to create a small resistance when the multi-axis head H moves forward.
It is configured to provide a large amount of resistance when moving backward.
なお、一例としてピストン本体51の周囲に8
個の孔52を等間隔に設け、チエツクバルブ53
に4個のオリフイス54を不等間隔に設ければ、
第5図に見られるようにチエツクバルブ53がど
のように回転しても常に1つのオリフイス54が
ピストン本体51の孔52と連通するような緩衝
器用ピストンが構成できる。 In addition, as an example, there are 8 holes around the piston body 51.
The check valve 53 is provided with several holes 52 at equal intervals.
If four orifices 54 are provided at uneven intervals,
As shown in FIG. 5, a shock absorber piston can be constructed in which one orifice 54 always communicates with the hole 52 of the piston body 51 no matter how the check valve 53 rotates.
上述した実施例において、加工位置へ向けて
(図中左方向)多軸頭Hを前進させると、ロツド
3に固着されたピストン5も後部シリンダ2から
前部シリンダ1側へと移動するが、この前進行程
においてはピストン本体51の後方に設けられた
チエツクバルブ53はピストン本体51の後面か
ら離れるため、ピストン5は何ら抵抗を受けるこ
となく前進し、刃物cがバルブシートVsに当接
した加工状態においては、小径をなす前部シリン
ダ1の前端付近に達する。 In the embodiment described above, when the multi-axis head H is advanced toward the processing position (leftward in the figure), the piston 5 fixed to the rod 3 also moves from the rear cylinder 2 to the front cylinder 1 side. During this forward movement, the check valve 53 provided at the rear of the piston body 51 separates from the rear surface of the piston body 51, so the piston 5 moves forward without any resistance, and the cutting tool c comes into contact with the valve seat Vs. In this state, it reaches near the front end of the front cylinder 1 which has a small diameter.
バルブシートVsに対する所要の加工が終了し
て多軸頭Hが後退行程に移ると、前部シリンダ1
の前端付近に位置していたピストン5もこれに伴
なつて図中右方向への移動を開始する。しかしな
がら、この行程においてチエツクバルブ53はピ
ストン本体51の後面に密着して孔52を閉塞す
るから、ピストン5には、前部シリンダ1の内壁
との間の狭いクリアランスとオリフイス54の径
の和に相当する減衰力が発生し、大きな抵抗を受
けて前部シリンダ1内での移動はわずかとなる。
このため、多軸頭Hが後退を続けると、ピストン
5は、前部シリンダ1を介してサポートプレート
Pをスプリングeに抗して後退させ、この小さな
相対的移動の期間にサポートピンbを外側に移動
させて刃物ホルダaの拘束を解し時間を稼ぐ。 When the required machining for the valve seat Vs is completed and the multi-axis head H moves to the backward stroke, the front cylinder 1
Along with this, the piston 5, which was located near the front end of the piston 5, also starts moving rightward in the figure. However, in this stroke, the check valve 53 comes into close contact with the rear surface of the piston body 51 and closes the hole 52, so the piston 5 has a narrow clearance between the inner wall of the front cylinder 1 and the sum of the diameter of the orifice 54. A corresponding damping force is generated and the displacement within the front cylinder 1 is small due to the large resistance.
Therefore, when the multi-axis head H continues to retreat, the piston 5 causes the support plate P to retreat through the front cylinder 1 against the spring e, and during this small relative movement, the support pin b is moved outward. to free the blade holder a and buy time.
多軸頭Hの後退がさらに続いてピストン5がや
がて小径の前部シリンダ1から脱すると、後部シ
リンダ2との間のクリアランスが急激に増大し、
これに伴なつて抵抗も減少するから、これまでピ
ストン5に追従して後退を続けていたサポートプ
レートPはスプリングeに付勢されて図中左方向
に移動し、治具Jの表面に突出するガイドポスト
K(第1図)に当接して一連の行程が終了する。 When the multi-axis head H continues to retreat further and the piston 5 eventually disengages from the small diameter front cylinder 1, the clearance between it and the rear cylinder 2 increases rapidly.
Along with this, the resistance also decreases, so the support plate P, which had previously continued to retreat following the piston 5, is urged by the spring e and moves to the left in the figure, protruding onto the surface of the jig J. The series of strokes ends when the guide post K (Fig. 1) is contacted.
(効果)
以上述べたように本考案によれば、加工機本体
の後退方向に段階的に内径を大きくしたシリンダ
と、後退時に流体の抵抗作用を受けるピストンを
介して、先端に刃物支持部材を備えた加工機本体
と、軸受部材を備えた軸受支持部材を結合したの
で、加工後に加工機本体を急速に後退させても、
そ後退動の初期において、加工機本体と一体をな
すピストンがその抵抗作用によりシリンダを介し
て軸受支持部材を後退動させ、この間の加工機本
体と軸受支持部材とのわずかな相対的移動により
軸受部材が刃物支持部材を十分に釈放する時間を
稼いで、軸受部材と刃物との接触により生じる損
傷を未然に防止することができる。(Effects) As described above, according to the present invention, the blade support member is attached to the tip through a cylinder whose inner diameter is gradually increased in the backward direction of the processing machine body, and a piston that is subjected to the resistance of the fluid during backward movement. Since the processing machine main body equipped with a bearing member and the bearing support member equipped with a bearing member are combined, even if the processing machine main body is rapidly retreated after processing,
At the beginning of the backward movement, the piston, which is integral with the processing machine body, moves the bearing support member backward through the cylinder due to its resistance, and the slight relative movement between the processing machine body and the bearing support member during this period causes the bearing to move backward. It is possible to buy time for the member to sufficiently release the blade support member, thereby preventing damage caused by contact between the bearing member and the blade.
しかも、その後に続く加工機本体の後退動によ
りこれと一体のピストンをシリンダの大径部に移
動させることができるため、刃物支持部材が軸受
部材から離れた段階で軸受支持部材を急速に原位
置に復帰させることができて、つぎの作動に備え
ることができる。 Moreover, the subsequent backward movement of the processing machine body allows the piston integrated with it to be moved to the large diameter part of the cylinder, so that the bearing support member can be quickly moved to its original position when the cutter support member is separated from the bearing member. It can be returned to normal state and ready for the next operation.
第1図イ,ロは、自動調心軸受を備えた内燃機
関のバルブシートの加工装置における加工前と加
工状態を示す一部切断側面図、第2図は、本考案
装置を施した同上装置の概要構成図、第3図は、
本考案の一実施例を示す装置の一部切断側面図、
第4図は、同上装置に適用されるピストンの斜視
図、第5図イ,ロは、ピストン及びチエツクバル
ブの孔の配置関係を示す図である。
1,2……シリンダ、3……ロツド、5……ピ
ストン、51……ピストン本体、53……チエツ
クバルブ、a……刃物ホルダ、b……サポートピ
ン、c……刃物、g……バルブガイド、H……多
軸頭、P……サポートプレート、s……スピンド
ル、Vs……バルブシート。
Figures 1A and 1B are partially cutaway side views showing before and after processing in a processing device for valve seats for internal combustion engines equipped with self-aligning bearings, and Figure 2 is a partially cutaway side view showing the processing state of the valve seat for an internal combustion engine equipped with a self-aligning bearing. The schematic configuration diagram, Figure 3, is
A partially cutaway side view of a device showing an embodiment of the present invention;
FIG. 4 is a perspective view of a piston applied to the above device, and FIGS. 5A and 5B are diagrams showing the arrangement relationship between the piston and the holes in the check valve. 1, 2... Cylinder, 3... Rod, 5... Piston, 51... Piston body, 53... Check valve, a... Cutler holder, b... Support pin, c... Cutler, g... Valve. Guide, H...Multi-axis head, P...Support plate, s...Spindle, Vs...Valve seat.
Claims (1)
て進退動する加工機本体と、上記刃物支持部材の
周面に接離して該支持部材の支持及び解放を行な
う軸受部材を備えかつ上記加工機本体に対してそ
の前進方向への付勢力を受けた状態で前後に可動
に配設された軸受支持部材と、上記軸受支持部材
上に固定されかつ上記加工機本体の後退方向に向
けて内径を段階的に大きくなした密閉シリンダ
と、上記加工機本体の一部に固定されかつ該加工
機本体の後退時に大きな流体抵抗作用を受けるよ
う上記シリンダ内に摺動可能に配設されたピスト
ンとを備えてなる加工機における油圧緩衝装置。 The above-mentioned processing machine has a main body of the processing machine, which has a cutter support member at its tip and moves forward and backward relative to the workpiece, and a bearing member which approaches and separates from the circumferential surface of the cutter support member to support and release the support member. a bearing support member disposed to be movable back and forth while receiving a biasing force in the forward direction of the main body; A sealed cylinder whose size is increased in stages, and a piston which is fixed to a part of the processing machine main body and is slidably disposed within the cylinder so as to receive a large fluid resistance when the processing machine main body retreats. Hydraulic shock absorber for processing machines.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12300983U JPS6031908U (en) | 1983-08-08 | 1983-08-08 | Hydraulic shock absorber in processing machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12300983U JPS6031908U (en) | 1983-08-08 | 1983-08-08 | Hydraulic shock absorber in processing machines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6031908U JPS6031908U (en) | 1985-03-04 |
JPS624424Y2 true JPS624424Y2 (en) | 1987-01-31 |
Family
ID=30280952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12300983U Granted JPS6031908U (en) | 1983-08-08 | 1983-08-08 | Hydraulic shock absorber in processing machines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6031908U (en) |
-
1983
- 1983-08-08 JP JP12300983U patent/JPS6031908U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6031908U (en) | 1985-03-04 |
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