JPH11198084A - Fluid pressure chuck for low speed opening and closing motion - Google Patents

Fluid pressure chuck for low speed opening and closing motion

Info

Publication number
JPH11198084A
JPH11198084A JP1827298A JP1827298A JPH11198084A JP H11198084 A JPH11198084 A JP H11198084A JP 1827298 A JP1827298 A JP 1827298A JP 1827298 A JP1827298 A JP 1827298A JP H11198084 A JPH11198084 A JP H11198084A
Authority
JP
Japan
Prior art keywords
fluid pressure
film
piston
closing motion
low speed
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
Application number
JP1827298A
Other languages
Japanese (ja)
Inventor
Masahiko Suzuki
雅彦 鈴木
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.)
Kondo Seisakusho KK
Original Assignee
Kondo Seisakusho 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 Kondo Seisakusho KK filed Critical Kondo Seisakusho KK
Priority to JP1827298A priority Critical patent/JPH11198084A/en
Publication of JPH11198084A publication Critical patent/JPH11198084A/en
Pending legal-status Critical Current

Links

Landscapes

  • Jigs For Machine Tools (AREA)
  • Manipulator (AREA)

Abstract

PROBLEM TO BE SOLVED: To stably carry out opening and closing motion without causing a stick slip phenomenon by forming a film of a crystalline substance of nickel phosphide on a metal surface of a cylinder part and making this film impregnated with a tetrafluoride resin the friction coefficient of which is extremely small. SOLUTION: A fluid pressure chuck is constituted of a pair of master jaws 3a, 3b to connect a body 1 having a cylinder part and a guide part and a guide rod 4 having a piston load track part to each other. Pistons 2a, 2b are respectively inserted in two pieces of the cylinder parts in positions facing each other, the piston 2a starts moving to the right as fluid pressure is applied from a first pressure port 7a, and the piston 2b starts moving to the left respectively. A film of a crystalline substance of nickel phosphide is formed on a metal surface of the cylinder part, and a tetrafluoride resin the friction coefficient of which is extremely low is impregnated into this surface. Consequently, it is possible to stably carry out opening and closing motion even at the time of low speed working.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する分野】本発明は、低速でのクランプを必
要とする被保持体のクランプに使用される流体圧チャッ
クに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic chuck used for clamping an object to be held which requires a low-speed clamping.

【0002】[0002]

【従来の技術】従来、ガラス等の壊れやすい部品や変形
しやすい部品をチャックでクランプする場合爪の動作速
度が速いと、クランプ時に生じる衝撃により部品を破損
してしまう為、低速でのクランプが必要になり、速度調
整弁により流体圧流量を調整することでマスタージョウ
の開閉速度の設定を行っている。
2. Description of the Related Art Conventionally, when a fragile or deformable part such as glass is clamped with a chuck, if the operating speed of the nail is high, the part is damaged by an impact generated at the time of clamping. When necessary, the opening and closing speed of the master jaw is set by adjusting the fluid pressure flow rate with a speed adjusting valve.

【0003】現在、流体圧チャックの部品は軽量化を目
的としてアルミニウムが多く使用されているが、アルミ
ニウムは加工表面が酸化しやすいため陽極酸化処理を行
い耐摩耗性および耐蝕性に優れた酸化アルミニウム皮膜
を生成させた後、封孔処理を行い更に耐蝕性を向上させ
た部品が一般的に使用されている。
At present, aluminum is often used as a component of a fluid pressure chuck for the purpose of weight reduction. However, since aluminum is easily oxidized on a processing surface, aluminum is subjected to anodizing treatment and aluminum oxide having excellent wear resistance and corrosion resistance is used. After the film is formed, a part which is subjected to a sealing treatment to further improve the corrosion resistance is generally used.

【0004】前記酸化アルミニウム皮膜は耐摩耗性と耐
蝕性に優れた特性を持つが、金属表面の摺動性の向上を
図る特性はなく、クランプ時に被保持体に働く衝撃によ
る破損を防ぐために速度調整弁により流体圧流量を絞っ
ていき、ピストンの移動速度を遅くすることでマスター
ジョウの開閉速度を遅くしていくと、ある速度を下回っ
た時点でピストン始動時のピストンシールとシリンダ内
壁との摺動抵抗が動き出したあとの摺動抵抗より大きく
なることによる飛び出し現象の繰り返し、いわゆるステ
ィックスリップ現象を誘発する原因となり、安定した低
速開閉動作をする事ができなくなってしまう。
[0004] The aluminum oxide film has excellent properties of abrasion resistance and corrosion resistance, but has no property to improve the slidability of the metal surface. If the opening and closing speed of the master jaw is slowed down by reducing the fluid pressure flow rate by the adjusting valve and slowing the moving speed of the piston, when the speed falls below a certain speed, the clearance between the piston seal and the inner wall of the cylinder at the time of starting the piston is reduced. The repetition of the popping-out phenomenon caused by the sliding resistance being larger than the sliding resistance after the movement starts, which causes a so-called stick-slip phenomenon, makes it impossible to perform a stable low-speed opening / closing operation.

【0005】この為必要とする開閉速度が更に低速であ
っても安定した動作を得るためにスティックスリップ現
象の起きない速度域にて使用しなければならず、クラン
プ時の衝撃により被保持体が破損するなどの問題があっ
た。
For this reason, even if the required opening / closing speed is even lower, in order to obtain a stable operation, it must be used in a speed range in which the stick-slip phenomenon does not occur. There were problems such as damage.

【0006】[0006]

【発明が解決しようとする課題】本発明は、低速開閉動
作時においてもスティックスリップ現象を起こすことな
く安定した開閉動作する事ができ、被保持体に衝撃を与
える事なくクランプすることの出来る流体圧チャックを
提供することを目的とする。
SUMMARY OF THE INVENTION The present invention relates to a fluid that can be stably opened and closed without causing a stick-slip phenomenon even at the time of low-speed opening and closing operation, and can be clamped without giving an impact to a held body. It is an object to provide a pressure chuck.

【0007】[0007]

【課題を解決するための手段】シリンダー部の金属表面
に、鉄系金属に限らずアルミなどの軽金属にも生成する
ことのできるリン化ニッケルの結晶体の皮膜を形成させ
る。
On the metal surface of the cylinder portion, a film of a crystal of nickel phosphide which can be formed not only on iron-based metals but also on light metals such as aluminum is formed.

【0008】さらにリン化ニッケルの結晶体の皮膜に摩
擦係数の極めて小さい四弗化樹脂を含浸させることで摺
動性に優れた表面にできる。
Further, by impregnating the nickel phosphide crystal film with a tetrafluoride resin having an extremely small friction coefficient, a surface having excellent slidability can be obtained.

【0009】リン化ニッケルの結晶体皮膜は金属表面の
ニッケルリン皮膜を熱処理して生成する為、硬さを向上
させ耐摩耗性に優れた表面にすることができる。
The nickel phosphide crystalline film is formed by heat-treating the nickel phosphorus film on the metal surface, so that the surface can be improved in hardness and excellent in wear resistance.

【0010】またニッケルリン皮膜は耐蝕性に優れた性
質をもっている。
[0010] The nickel phosphorus film has excellent corrosion resistance.

【0011】[0011]

【発明の実施の形態】図1,図2に本発明の実施例を示
す。
1 and 2 show an embodiment of the present invention.

【0012】本実施例は、シリンダ部とガイド部を有す
るボディ1とピストンロットとラック部を有するガイド
ロット4を連結する一対のマスタージョウ3a,3bか
らなり、2個のシリンダー部には対抗する向きでそれぞ
れピストン2a,2bが挿入されており、第1圧力ポー
ト7aより流体圧が加わることでピストン2aが図面右
へ、ピストン2bが図面左へそれぞれ移動を開始する。
This embodiment comprises a pair of master jaws 3a and 3b connecting a body 1 having a cylinder portion and a guide portion, a guide lot 4 having a piston lot and a rack portion, and opposes two cylinder portions. The pistons 2a and 2b are inserted in the respective directions, and when the fluid pressure is applied from the first pressure port 7a, the piston 2a starts moving rightward in the drawing and the piston 2b starts moving leftward in the drawing.

【0013】ピストンはマスタージョウによりガイドロ
ットと連結されており、ガイドロット4にはラック部が
形成され、そのラック部がボディ本体1の中心軸線上に
配置されるピニオン5と噛合しピニオンが回動する事で
マスタージョウを同期させる構造となっている。
The piston is connected to the guide lot by a master jaw. A rack portion is formed in the guide lot 4, and the rack portion meshes with a pinion 5 arranged on the center axis of the body 1 so that the pinion rotates. It has a structure that synchronizes the master jaw by moving.

【0014】本実施例は、流体圧チャックのシリンダ部
の金属表面にリン化ニッケルの結晶体の皮膜を生成さ
せ、この表面に摩擦係数の極めて低い四弗化樹脂を含浸
させる事で低速作動時においてもスティクスリップ現象
を起こすことなく円滑な開閉動作が可能となる。
In this embodiment, a nickel phosphide crystal film is formed on the metal surface of the cylinder portion of the fluid pressure chuck, and this surface is impregnated with a tetrafluoride resin having an extremely low coefficient of friction to operate at low speed. In this case, a smooth opening / closing operation can be performed without causing a stick-slip phenomenon.

【0015】なお、本発明はシリンダ部に処理を施す方
式である為、平行タイプ、支点タイプ及び駆動方式など
に影響されることなく同様の効果がえられる。
Since the present invention is a system for processing a cylinder portion, the same effect can be obtained without being affected by a parallel type, a fulcrum type, a driving system, and the like.

【0016】[0016]

【発明の効果】アルミニウム部品の場合加工表面が酸化
しやすいため、陽極酸化処理を施し酸化アルミニウム皮
膜を生成させ、耐蝕性の向上を図った部品を使用するの
が一般的であり、低速での開閉動作を必要としない使用
条件であればスティックスリップ現象などの問題もなく
使用できる。
In the case of aluminum parts, since the processed surface is easily oxidized, it is common to use parts which have been subjected to anodic oxidation treatment to form an aluminum oxide film to improve the corrosion resistance. If the use condition does not require the opening and closing operation, it can be used without any problem such as the stick-slip phenomenon.

【0017】しかし衝撃による破損をおこしやすい被保
持体をクランプするためには低速で安定した開閉動作が
必要とされるため、速度調整弁により流体圧流量を絞り
スティックスリップ現象の発生しない限界の速度に設定
し、マスタージョウが10mm移動するのにどれだけの
時間をかけて移動する事ができるか測定を行った。
However, since a stable opening and closing operation at a low speed is required in order to clamp an object which is liable to be damaged by an impact, a speed regulating valve is used to reduce the fluid pressure flow rate and limit the speed at which the stick-slip phenomenon does not occur. Was set, and how long it took for the master jaw to move 10 mm was measured.

【0018】その結果、アルミニウムの表面処理として
一般的な陽極酸化処理を施し酸化アルミニウム皮膜を生
成させた部品を使用した場合、10mm移動するのにか
けられる最長時間は3秒であることが実測により求めら
れた。
[0018] As a result, when using a component which has been subjected to a general anodic oxidation treatment as an aluminum surface treatment to form an aluminum oxide film, the maximum time required for moving 10 mm is 3 seconds by actual measurement. Was done.

【0019】これに対し、本発明の流体圧チャックは部
品の金属表面にリン化ニッケル皮膜の結晶体の皮膜を生
成させ、そのリン化ニッケルの結晶体を形成した金属表
面に摩擦係数の極めて小さい四弗化樹脂を含浸させるこ
とにより、従来アルミニウム部品に一般的に行われてい
る陽極酸化処理を施した流体圧チャックに較べ速度調整
弁により流体圧流量を更に絞った状態であっても、ステ
ィックスリップ現象を起こす事無く低速で安定した開閉
動作をする事ができる。
On the other hand, in the fluid pressure chuck of the present invention, a nickel phosphide film is formed on the metal surface of the component, and the friction coefficient is extremely small on the metal surface on which the nickel phosphide crystal is formed. By impregnating with tetrafluoride resin, even if the fluid pressure flow rate is further reduced by the speed control valve compared to the fluid pressure chuck that has been subjected to anodizing treatment commonly performed on aluminum parts, even if the fluid pressure flow rate is further reduced. A stable opening and closing operation can be performed at a low speed without causing a slip phenomenon.

【0020】本発明を実施した流体圧チャックを使い従
来の流体圧チャックに行ったのと同様に10mm移動す
るのにかけられる最長時間の測定をすると、従来の流体
圧チャックが3秒であったのに対し本発明の流体圧チャ
ックはスティックスリップ現象を起こすことなく30秒
もの時間をかけ安定した開閉動作をすることができる事
が実測により明かになった。
Using the fluid pressure chuck embodying the present invention and measuring the longest time required to move by 10 mm in the same manner as performed on the conventional fluid pressure chuck, the conventional fluid pressure chuck was 3 seconds. On the other hand, it has been clarified by actual measurement that the fluid pressure chuck of the present invention can perform a stable opening / closing operation over 30 seconds without causing a stick-slip phenomenon.

【0021】よって本発明の流体圧チャックはクランプ
時の衝撃により破損する可能性のある保持体であっても
安定した低速動作が可能なため衝撃を与える事なくクラ
ンプする事ができ、クランプ時の衝撃による被保持の破
損を防ぐ事が可能である。
Therefore, the fluid pressure chuck according to the present invention can perform a stable low-speed operation even if the holding member is likely to be damaged by the impact at the time of clamping, so that it can be clamped without giving an impact. It is possible to prevent the holding member from being damaged by the impact.

【0022】また、ニッケルリン皮膜は耐蝕性に優れた
性質をもっているため従来の処理の目的であるアルミニ
ウムの加工表面の耐蝕性の問題も解消することができ
る。
Further, since the nickel phosphorus film has excellent corrosion resistance, the problem of the corrosion resistance of the processed surface of aluminum, which is the object of the conventional treatment, can be solved.

【0023】更にリン化ニッケルの結晶体を形成させる
ために、ニッケルリン皮膜に熱処理をおこなっており、
この熱処理により表面硬度が硬くなるため耐摩耗性を向
上させることができるなどの効果も得る事ができる。
Further, in order to form a crystal of nickel phosphide, a heat treatment is performed on the nickel phosphorus film,
Since the surface hardness is increased by this heat treatment, it is possible to obtain effects such as improvement of wear resistance.

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

【図1】発明の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.

【図2】発明の実施例を示すピニオン部の部分断面図で
ある。
FIG. 2 is a partial cross-sectional view of a pinion portion showing the embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 ボディ 2a ピストン 2b ピストン 3a マスタージョウ 3b マスタージョウ 4 ガイドロット 5 ピニオン 6 支点軸 7a 第1圧力ポート 7b 第2圧力ポート 8 シリンダカバー Reference Signs List 1 body 2a piston 2b piston 3a master jaw 3b master jaw 4 guide lot 5 pinion 6 fulcrum shaft 7a first pressure port 7b second pressure port 8 cylinder cover

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 流体圧シリンダーの駆動力により開閉す
る複数のマスタージョウを備えた駆動部とガイド部より
構成される流体圧チャックにおいて、シリンダー部の金
属表面にリン化ニッケル結晶体の皮膜を形成し、この表
面組織に四弗化樹脂を含浸させた事を特徴とする流体圧
チャック。
1. A fluid pressure chuck comprising a drive unit having a plurality of master jaws which are opened and closed by a driving force of a fluid pressure cylinder and a guide unit, wherein a nickel phosphide crystal film is formed on a metal surface of the cylinder unit. A fluid pressure chuck characterized in that the surface structure is impregnated with a tetrafluoride resin.
JP1827298A 1998-01-12 1998-01-12 Fluid pressure chuck for low speed opening and closing motion Pending JPH11198084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1827298A JPH11198084A (en) 1998-01-12 1998-01-12 Fluid pressure chuck for low speed opening and closing motion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1827298A JPH11198084A (en) 1998-01-12 1998-01-12 Fluid pressure chuck for low speed opening and closing motion

Publications (1)

Publication Number Publication Date
JPH11198084A true JPH11198084A (en) 1999-07-27

Family

ID=11967027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1827298A Pending JPH11198084A (en) 1998-01-12 1998-01-12 Fluid pressure chuck for low speed opening and closing motion

Country Status (1)

Country Link
JP (1) JPH11198084A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003175431A (en) * 2001-12-11 2003-06-24 Tec Yasuda:Kk Hydraulic double-clamp fixture and grip vice for a plurality of workpieces
CN102049692A (en) * 2010-12-01 2011-05-11 宜昌中冶重工机械有限公司 Plate spring tensioning tool and machining method
CN103802123A (en) * 2014-02-26 2014-05-21 温州职业技术学院 Manipulator with three-dimensional elastic clamping paw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003175431A (en) * 2001-12-11 2003-06-24 Tec Yasuda:Kk Hydraulic double-clamp fixture and grip vice for a plurality of workpieces
CN102049692A (en) * 2010-12-01 2011-05-11 宜昌中冶重工机械有限公司 Plate spring tensioning tool and machining method
CN103802123A (en) * 2014-02-26 2014-05-21 温州职业技术学院 Manipulator with three-dimensional elastic clamping paw

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