WO2019116480A1 - Structure d'appui indirect à deux étages - Google Patents

Structure d'appui indirect à deux étages Download PDF

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Publication number
WO2019116480A1
WO2019116480A1 PCT/JP2017/044810 JP2017044810W WO2019116480A1 WO 2019116480 A1 WO2019116480 A1 WO 2019116480A1 JP 2017044810 W JP2017044810 W JP 2017044810W WO 2019116480 A1 WO2019116480 A1 WO 2019116480A1
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WO
WIPO (PCT)
Prior art keywords
working chamber
piston member
piston
seating
workpiece
Prior art date
Application number
PCT/JP2017/044810
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English (en)
Japanese (ja)
Inventor
井納繁幸
水谷大輔
赤津典孝
Original Assignee
株式会社Ｆｕｊｉ
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 株式会社Ｆｕｊｉ filed Critical 株式会社Ｆｕｊｉ
Priority to PCT/JP2017/044810 priority Critical patent/WO2019116480A1/fr
Priority to JP2019559478A priority patent/JP7018962B2/ja
Publication of WO2019116480A1 publication Critical patent/WO2019116480A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools

Definitions

  • the present invention relates to a two-stage indirect seating structure for checking the seating of a workpiece on a chuck.
  • Patent Document 1 discloses an invention relating to a seating confirmation means using air.
  • an air flow path is formed in the main body of the chuck device, and is communicated with the air discharge port opened in the seating surface. Therefore, if the work comes into contact with the seating surface, the release of the air sent to the air discharge port is limited and the back pressure in the flow path becomes high, while if the work is not seated, the air is discharged from the air discharge port The back pressure is lowered by this. Therefore, in the seating detection device, the determination as to whether the seating of the work is appropriate or not is made by measuring the back pressure.
  • the seating confirmation of the work is judged by the air leak of a slight gap. Therefore, as in the conventional example, in the direct seating structure in which the seating confirmation is performed by the work directly blocking the air discharge port, an accurate determination may not be made depending on the case. If the rigidity of the workpiece is low, the workpiece will bend due to the gripping load at the time of clamping, and even though the chuck is gripping the workpiece properly, the workpiece will float from the seating surface due to the slight distortion. It is. And in such a case, even if the amount of clearance is small, the correct determination may not be made due to air leakage.
  • an object of this invention is to provide the two-stage-type indirect seating structure which performs determination by air leak by movement of the rod applied to a workpiece
  • the two-stage indirect seating structure is a chuck portion that holds a work by a plurality of chuck claws, and a first working chamber and a second working chamber formed continuously in the direction with respect to the work
  • a first piston member inserted into the first working chamber so that the rod portion protrudes outward from the chuck portion, and a second piston member inserted into the second working chamber such that the rod portion is pressed against the first piston member;
  • a second piston member axially formed with a through hole, a biasing member inserted into the second working chamber, and biasing the second piston member toward the first piston member, and the second working chamber And a through hole of the second piston member, and an air flow passage communicating with an open hole formed on the side of a pressing portion for pressing the first piston member of the first working chamber.
  • the second piston member of the second working chamber is biased by the biasing member with respect to the first piston member in the first working chamber which protrudes the rod portion outside the chuck portion, and the rod portion is The first piston member in the working chamber is pressed against the first piston member. Therefore, the dimension of the gap between the rod portion of the second piston member and the first piston member becomes smaller than the amount by which the first piston member is pushed into the work, and the through hole in the second working chamber and the second piston member The flow rate of air discharged from the open hole can be reduced.
  • FIG. 1 is a view schematically showing, from the side, an internal structure of a spindle chuck in a state in which a workpiece is gripped.
  • FIG. 2 is a front view showing the spindle chuck from the direction of gripping the work.
  • the spindle chuck 1 is rotatably incorporated in a spindle device of a machine tool, and rotates while holding a workpiece W to be processed.
  • three chuck claws 3 are arranged at equal intervals in a circumferential direction with respect to a circular chuck body 2. Only one chuck jaw 3 is shown in FIG.
  • the three chuck claws 3 are integrally formed with the radially arranged chuck slides 4 and are configured to reciprocate in linear motion in synchronization with the radial direction.
  • the chuck jaws 3 move in the center direction, which enables the clamp gripping the work W as shown in FIG. 1, and the movement in the radial outward direction on the contrary makes it unclamp to release the work W.
  • the spindle chuck 1 is provided with three counter metals 5 between three chuck slides 4. When the spindle chuck 1 grips the workpiece W, for example, the workpiece W automatically conveyed by the autoloader is pressed against the counter metal 5 and gripped by the chuck claw 3 as described above.
  • FIG. 6 is a view schematically showing such a conventional indirect seating structure, in which A state, B state and C state are shown.
  • a cylinder in which a piston 102 slides in a counter metal 101 is configured, and a rod portion 121 integral with the piston 102 protrudes outward from a seating surface 111.
  • the working chamber 103 in which the piston 102 moves is formed inside the counter metal 101, and the air flow path 201 which has passed through the inside of the spindle chuck on the pressing portion side 131 opposite to the rod portion 121 partitioned by the piston 102. Are in communication. Further, an open hole 105 for opening the pressure part side 131 of the working chamber 103 to the atmosphere is formed in the winning metal 101. Accordingly, in the case of the A state, when air is supplied into the working chamber 103 (pressurizing portion side 131) via the air flow path 201, the piston 102 is pressurized, and the rod portion 121 is moved from the seating surface 111. It will stick out. At this time, since the air supplied into the working chamber 103 is released to the atmosphere from the open hole 105, the back pressure in the air flow passage becomes a low value.
  • a two-stage indirect seating structure 10 is configured with respect to the counter metal 5 of the spindle chuck 1 as shown in the round frame of FIG.
  • FIGS. 3, 4 and 5 are enlarged cross-sectional views of the winning portion showing the two-stage indirect seating structure 10, corresponding to the A state, B state and C state of FIG.
  • All of the counter metals 5 provided at three positions of the spindle chuck 1 are fixed on the base 6 so as to protrude toward the workpiece W at the time of clamping, and a two-stage indirect seating structure 10 is constructed at all three positions. ing.
  • a first working chamber 11 and a second working chamber 12 are continuously formed in the inside of the metal block 5 and the base 6 in the direction (horizontal direction in the drawing) with respect to the work W, and the first piston 13 and the second piston 14 are formed. It is inserted.
  • a seating surface 21 is formed on a convex portion of the metal 5, and the rod portion 22 of the first piston 13 protrudes from the seating surface 21 through a rod hole 15 penetrating between the first working chamber 11 and the other.
  • the first working chamber 11 is opened at the end face of the block forming the hitch 5, and the second working chamber 12 is opened at the end face of the base 6 facing the hitter 5. Overlapping, both rooms are continuous.
  • the first piston 13 inserted into the first working chamber 11 is in a state where the rod portion 22 projects maximally, and the stop position of the head side stroke end shown in FIG.
  • the end face of the rod portion 22 is configured to be flush with the seating surface.
  • the dimension of the second working chamber 12 in the radial direction is larger than that of the first working chamber 11.
  • the position where the second piston 14 hits the block of the counter metal 5 is the rod side stroke end, and in that state, the rod portion 23 (see the inside of the round frame in FIG. It is intruding.
  • the second piston 14 is formed with an axially stepped through hole 24 and is always urged toward the rod portion 23 by a spring 16 inserted therein. Accordingly, as shown in FIG. 3, the second piston 14 is in a normal state in which the rod portion 23 has entered the first working chamber 11.
  • An air flow path 7 is formed in the spindle chuck 1 as shown in FIG. 1 and is in communication with the second working chamber 14.
  • an open hole 17 is formed between the block of the metal block 5 and the base 6 to open the pressurized portion side of the first working chamber 11 to the atmosphere. Therefore, in the spindle chuck 1, the air flow path 7 is in communication with the second working chamber 12, the through hole 24 of the second piston 14, the first working chamber 11 and the opening hole 17.
  • air is supplied to such a spindle chuck 1 via the air flow path 7, and the back pressure in each state of FIG. 3 to FIG. 5 is measured to determine the suitability of the workpiece W regarding seating. Is supposed to be done.
  • the seating detection device for example, air of a predetermined pressure is supplied from the air compressor toward the air flow path 7, and a pressure switch provided in the air pipe measures a back pressure for detecting the air pressure in the flow path. Then, air is normally supplied toward the second working chamber 12, and air pressure is applied to the first piston 13 of the first working chamber 11 through the through hole 24 of the second piston 14. Therefore, as shown in FIG. 3, the first piston 13 moves to the rod side stroke end, and the rod portion 22 protrudes from the seating surface 21. Thus, when the first piston 13 and the second piston 14 are separated, the air flowing into the first working chamber 11 is released to the atmosphere through the open hole 17.
  • the first piston 13 is not in contact with the second piston 14, and the air flowing into the first working chamber 11 is discharged to the atmosphere through the open hole 17.
  • the second piston 14 since the second piston 14 is in the first working chamber 11, the second piston 14 (when the first piston 13 is positioned between the stroke ends shown in FIGS. 3 and 4).
  • the gap D with the end face of the rod portion 23 is narrow. That is, the dimension of the gap D which discharges air and affects back pressure measurement is smaller than the dimension C of the first piston 13 when the workpiece W can not push back.
  • the two-stage indirect seating structure 10 causes the gap of the rod portion 23 of the second piston 14 to enter the first working chamber 11 as compared to the amount of movement of the first piston 13. D can be narrowed. Therefore, even if the movement amount is small without causing the work W to be distorted and the first piston 13 to be pushed in sufficiently, it is possible to determine the clampable state by machining because the gap D to the open hole 17 is narrow. It will be possible to put out.
  • the first working chamber 11 and the second working chamber 12 have a configuration in which the openings overlap each other, and the rod portion 23 is in the first working chamber 11 at the stroke end of the second piston 14.
  • the compact two-stage indirect seating structure 10 is provided. Further, the configuration in which the spring 16 is inserted into the through hole 24 of the second piston 14 makes the system more compact.
  • the two-stage indirect seating structure 10 configured on the spindle chuck 1 of the machine tool is shown in the embodiment, it may be configured on another chuck.
  • the biasing member which is the shape of the first and second working chambers 11, 2 and the first and second pistons 13, 14 or the spring 16 may be different from the above embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

La présente invention concerne une structure d'appui indirect à deux étages pour effectuer une évaluation à l'aide d'une fuite d'air avec le mouvement d'une tige qui est placée en contact avec une pièce à usiner, la structure comprenant : une première chambre de fonctionnement et une seconde chambre de fonctionnement, qui sont dans une unité formant mandrin qui serre une pièce à usiner avec de multiples griffes de mandrin et qui sont formées consécutivement dans la direction qui fait face à la pièce à usiner ; un premier élément piston, qui est inséré dans la première chambre de fonctionnement de telle sorte qu'une partie tige fait saillie vers l'extérieur de l'unité formant mandrin ; un second élément piston, qui est inséré dans la seconde chambre de fonctionnement de telle sorte qu'une partie tige est pressée contre le premier élément piston et dans laquelle un trou traversant est formé dans la direction axiale ; un élément de sollicitation, qui est inséré dans la seconde chambre de fonctionnement et est destiné à solliciter le second élément piston vers le premier élément piston ; et un canal d'écoulement d'air qui se raccorde de la seconde chambre de fonctionnement au trou traversant du second élément piston et un trou ouvert formé dans la première chambre de fonctionnement sur le côté d'une partie de mise sous pression qui met sous pression le premier élément piston.
PCT/JP2017/044810 2017-12-14 2017-12-14 Structure d'appui indirect à deux étages WO2019116480A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2017/044810 WO2019116480A1 (fr) 2017-12-14 2017-12-14 Structure d'appui indirect à deux étages
JP2019559478A JP7018962B2 (ja) 2017-12-14 2017-12-14 ２段式間接着座構造

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/044810 WO2019116480A1 (fr) 2017-12-14 2017-12-14 Structure d'appui indirect à deux étages

Publications (1)

Publication Number Publication Date
WO2019116480A1 true WO2019116480A1 (fr) 2019-06-20

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PCT/JP2017/044810 WO2019116480A1 (fr) 2017-12-14 2017-12-14 Structure d'appui indirect à deux étages

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JP (1) JP7018962B2 (fr)
WO (1) WO2019116480A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004122305A (ja) * 2002-10-03 2004-04-22 Matsumoto Kikai Kogyo Kk ホイール加工用チャック
JP2008006543A (ja) * 2006-06-29 2008-01-17 Nippei Toyama Corp 工作機械におけるワークのクランプ異常検出方法、及び工作機械
JP2011143531A (ja) * 2010-01-12 2011-07-28 Kosmek Ltd クランプ装置
JP2017042860A (ja) * 2015-08-26 2017-03-02 富士機械製造株式会社 チャック装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10202474A (ja) * 1997-01-20 1998-08-04 Suzuki Motor Corp 切削加工設備のワーク昇降装置
JP2005288610A (ja) 2004-03-31 2005-10-20 Shin Caterpillar Mitsubishi Ltd 位置検出方法、位置検出装置および位置決め装置
JP6304812B2 (ja) 2014-03-31 2018-04-04 パスカルエンジニアリング株式会社 ワーク検知装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004122305A (ja) * 2002-10-03 2004-04-22 Matsumoto Kikai Kogyo Kk ホイール加工用チャック
JP2008006543A (ja) * 2006-06-29 2008-01-17 Nippei Toyama Corp 工作機械におけるワークのクランプ異常検出方法、及び工作機械
JP2011143531A (ja) * 2010-01-12 2011-07-28 Kosmek Ltd クランプ装置
JP2017042860A (ja) * 2015-08-26 2017-03-02 富士機械製造株式会社 チャック装置

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JPWO2019116480A1 (ja) 2020-10-22
JP7018962B2 (ja) 2022-02-14

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