WO2006059739A1 - 素材把持装置、素材ガイド装置及び自動旋盤 - Google Patents
素材把持装置、素材ガイド装置及び自動旋盤 Download PDFInfo
- Publication number
- WO2006059739A1 WO2006059739A1 PCT/JP2005/022230 JP2005022230W WO2006059739A1 WO 2006059739 A1 WO2006059739 A1 WO 2006059739A1 JP 2005022230 W JP2005022230 W JP 2005022230W WO 2006059739 A1 WO2006059739 A1 WO 2006059739A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chuck
- force
- cylindrical element
- drive
- driving force
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
- B23B31/201—Characterized by features relating primarily to remote control of the gripping means
- B23B31/207—Characterized by features relating primarily to remote control of the gripping means using mechanical transmission through the spindle
- B23B31/2072—Axially moving cam, fixed jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B13/00—Arrangements for automatically conveying or chucking or guiding stock
- B23B13/02—Arrangements for automatically conveying or chucking or guiding stock for turning-machines with a single working-spindle
- B23B13/021—Feeding device having intermittent movement
- B23B13/022—Feeding device having intermittent movement being placed in the spindle
- B23B13/024—Feeding device having intermittent movement being placed in the spindle including two collets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B7/00—Automatic or semi-automatic turning-machines with a single working-spindle, e.g. controlled by cams; Equipment therefor; Features common to automatic and semi-automatic turning-machines with one or more working-spindles
- B23B7/02—Automatic or semi-automatic machines for turning of stock
- B23B7/06—Automatic or semi-automatic machines for turning of stock with sliding headstock
-
- 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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
- B23Q1/76—Steadies; Rests
- B23Q1/763—Rotating steadies or rests
Definitions
- the present invention relates to a material gripping device that is incorporated in a machine tool and grips a workpiece (that is, a workpiece).
- the present invention also provides a machine tool.
- the present invention relates to a material guide device that supports a workpiece to be processed in the vicinity of the processing site. Furthermore, Akira Honda relates to an automatic lathe equipped with a material gripping device or material guiding device. book
- a material gripping device having a gripper that can be opened and closed and an operating mechanism that opens and closes the gripping part of the chuck is incorporated in order to securely hold the workpiece during the machining process.
- machine tools that can perform automatic turning such as NC lathes (collectively referred to as automatic lathes in this application), have a hollow cylindrical body with an elastically deformable slit structure gripping part.
- a chuck (generally called a collet chuck) is installed concentrically in the inner front end region of the main spindle of an automatic lathe, and an operating mechanism that elastically deforms the chuck gripping part under the automatic control of the drive part
- a material gripping device incorporated in a main shaft is well known.
- the operating mechanism is generally a hollow cylindrical operating member installed in the main shaft so as to be movable in the axial direction, and the output of the drive unit is used as an axial thrust in the operating member.
- a drive mechanism that moves the operating member from an open position that opens the gripping portion of the chuck to a closed position that closes the gripping portion of the chuck, and And a return spring that elastically biases the member from the closed position to the open position (for example, Japanese Patent No. 2 5 6 6 5 7 0 (JP—B— 2 5 6 6 5 7 0))
- the actuating member moves in the axial direction along the main shaft by driving the drive mechanism in a state where the rod-shaped workpiece material is fed into the main shaft and the actuating member from the rear of the main shaft.
- the gripping portion of the chuck is elastically deformed (ie, closed) to receive a pressing force on the frustoconical pressure receiving surface provided on the outer periphery thereof, so that the inner diameter size is reduced (ie, the diameter is reduced).
- the driving force of the driving mechanism is reversed or released from this state, the operating member moves in the reverse direction along the main shaft by the elastic biasing force of the return spring.
- the pressing force to the gripping part of the chuck is released, and the gripping part is elastically restored (that is, opened) so that the inner diameter dimension is expanded (that is, expanded), and the workpiece material is released.
- the operation member is moved in the axial direction with respect to the chuck stationaryly disposed in the spindle, and the operation member is connected to the chuck in the spindle together with the chuck.
- Any of the configurations that move in the axial direction is adopted as appropriate (for example, JP-A 2 0 0 0-2 4 6 5 2 2 (JP — A-2 0 0 0 — 2 4 6 5 2 2 See)).
- the operating member concentrically accommodated and supported by the main shaft accommodates and supports the chuck concentrically in the front end region of the main shaft, and on the annular portion of the operating member surrounding the chuck, A frustoconical working surface is formed that can be engaged with the pressure receiving surface.
- the gripping force is obtained by moving the working member in the direction of pushing out from the main shaft with respect to the chuck and pressing the working surface against the pressure receiving surface.
- the chuck is concentrically accommodated and supported in the front end region of the main shaft, and the operating member is concentrically accommodated and supported in the chuck rear region of the main shaft, and the gripping portion is provided on the front end annular portion of the main shaft surrounding the chuck.
- a frustoconical action surface that can be engaged with the pressure receiving surface on the outer periphery is formed.
- the gripping force is obtained by displacing the operating member with the chuck in the direction of pulling it into the spindle and pressing the pressure receiving surface against the working surface. .
- the type that obtains the grip and force of the chuck by displacing the working member in the main shaft in the pushing direction is called ⁇ working member push-out mold '', and the chuck is obtained by displacing the working member in the pulling direction in the main shaft.
- the type that obtains the gripping force is called the “working member retractable type”.
- the chacks In the above-described working member push-out type material gripping device, the chacks usually have a contact surface that comes into contact with a cap attached to the front end of the main shaft at the front portion in the axial direction. It is held stationary in the main shaft against the axial component of the pressing force received from the shaft.
- the chuck in the above-described working member retractable type material gripping device, the chuck usually has a connecting structure (for example, a thread structure) that is detachably connected to the front end of the working member at the rear portion in the axial direction. .
- the structure of the chuck is naturally different depending on the operation method of the actuating member.
- the chuck equipped on the material gripping device of the working member push-out type is referred to as “stationary chuck”, and the chuck equipped on the material gripping device of the working member retracting type is referred to as “moving chuck”. Called.
- a material guide device is generally configured to include a cylindrical guide bush having a hollow cylindrical material support portion that can be opened and closed, and an adjustment mechanism that adjusts the radial dimension of the material support portion of the guide bush.
- the material guide device In the conventional material guide device, there is a fixed type configuration in which a guide push is fixedly arranged with respect to a workpiece that rotates at high speed, and a rotary type configuration in which the guide bush rotates at high speed together with the workpiece. Either is adopted as appropriate. Regardless of the configuration, the material guide device supports the workpiece material so that there is no vibration at the additional part during turning by the material support part of the guide bush, thereby processing the product with high precision. Make it possible to do.
- the material guide device is attached to the material support part of the guide bush in either the fixed type or the rotary type.
- the workpiece In a state where the workpiece is centered and supported (that is, supported so that the workpiece axis is aligned with the rotation axis), the workpiece can be supported while accurately guiding the workpiece in the axial direction by moving the spindle in the axial direction. ing.
- the work material is inserted into the guide bush before starting the machining operation. Then, by operating the adjusting mechanism, the material support of the guide bush is elastically displaced, and its inner diameter is adjusted to match the outer diameter of the workpiece (round bar, square bar).
- this adjuster includes an actuating member that opens and closes the material support part of the guide push, a drive mechanism that moves the actuating member from the open position to the close position, and the actuating member is elastically attached from the close position to the open position. It is configured with a positive spring.
- the operating member push-out type material guide device with a stationary guide bush see JP-B-2 7 5 0 3 5 6
- the operation with a movable guide bush A retractable material guide device see JP-B-2 5 6 6 5 70
- the working member extrusion type material gripping device described above is configured such that the chuck does not move in the axial direction during the opening and closing operation thereof, the workpiece material gripped by the chuck is dragged by the closing operation of the gripping portion of the chuck. Therefore, movement in the axial direction is also reliably prevented. Therefore, an automatic lathe equipped with a material gripping device of an actuating member extrusion type ensures a high level of machining dimensional accuracy in the axial direction of the workpiece.
- the parting surface of the rod-shaped workpiece material can be used as it is as one end surface of the product, which eliminates the need for an end surface finishing process and shortens the cycle time of the machining process. Cutting amount can be reduced.
- the operating member retractable material gripping device described above is the main component of an automatic lathe.
- the chuck When assembled on the shaft, the chuck only accommodates the chuck in the front end area of the main shaft so that it can be slid relative to the main shaft, ensuring rigidity in the front end area of the main shaft, and preventing deterioration in rotational accuracy and accompanying reduction in machining accuracy. can do.
- the chuck since the chuck moves slightly in the axial direction during the opening and closing operation, the workpiece to be gripped by the chuck moves in the axial direction by being dragged by the closing operation of the gripping part of the chuck. As a result, the dimensional accuracy of the workpiece material in the axial direction tends to decrease.
- the parting surface of the rod-shaped workpiece is directly used as one end surface of the product. This is inconvenient and requires an end surface finishing process, which may increase the cycle time of the machining process and the amount of material cut.
- the conventional material gripping device has respective advantages and disadvantages corresponding to the operation method (extrusion die and retractable die) of the actuating member, and the machine tool (for example, an automatic lathe) to be mounted.
- the machine tool for example, an automatic lathe
- one of the operation methods selected in advance is adopted. Therefore, in the past, when trying to perform various types of machining on workpiece material under different conditions, two machine tools equipped with material gripping devices with different operation methods of the operating members are prepared.
- a machine element incorporating a material gripping device for example, a headstock of an automatic lathe
- a material gripping device for example, a headstock of an automatic lathe
- An object of the present invention is to appropriately configure the structure of the chuck operating mechanism in consideration of the machine configuration of the machine tool, the material of the workpiece to be machined, the required machining accuracy, etc. in the material gripping apparatus incorporated in the machine tool. It is an object of the present invention to provide a versatile material gripping device that can be easily changed and can prevent an increase in equipment costs and an increase in the burden on workers.
- Another object of the present invention is to provide a guide bush in consideration of the machine configuration of the machine tool, the material of the workpiece to be machined, the required machining accuracy, etc. in the material guide device incorporated in the machine tool.
- the purpose of the present invention is to provide a versatile material guide device that can easily and appropriately change the configuration of the adjustment mechanism, and that can prevent an increase in equipment costs and an increase in the burden on workers.
- Still another object of the present invention is to provide an automatic lathe capable of easily changing the opening / closing operation method of the material gripping device or the material guide device in the automatic lathe provided with the material gripping device or the material guide device.
- the present invention is a material gripping device, which is a cylindrical chuck having a gripping portion that can be opened and closed, an operating member that opens and closes the gripping portion, and a pressing force on the operating member.
- Work piece on the gripping part A driving mechanism that moves between a closing position for gripping the material and an opening position for releasing the pressing force to release the workpiece material, and the driving mechanism closes the operating member from the opening position.
- a material gripping device comprising a bidirectional driving member that alternatively applies a forward driving force to move to a position and a reverse driving force to move the operating member from a closed position to an open position.
- the material gripping device described above is a stationary type chuck that receives a pressing force on the gripping portion while the operating member moves from the opening position to the closing position, and the operating member moves from the opening position to the closing position.
- a movable chuck that moves together with the actuating member and receives the pressing force on the gripping portion can be provided so as to be exchangeable with each other.
- the actuating member is a first cylindrical element that selectively receives the forward driving force and the reverse driving force from the bidirectional driving member of the driving mechanism, and is attached to the movable chuck so as to be removable.
- the first cylindrical element can be replaced with a movable chuck, and it can be attached to the first cylindrical element so as to be detachable by aligning in the axial direction, and the stationary chuck is relatively moved in the axial direction.
- a second cylindrical element that can be supported.
- the positive direction driving force of the drive mechanism for closing the gripping part of the stationary chuck and the positive direction driving force of the driving mechanism for closing the gripping part of the movable chuck are in opposite directions. It can be the thrust applied to the actuating member.
- the drive mechanism can position the actuating member at an intermediate position between the closed position and the open position, and when the actuating member is at the intermediate position, the gripping part of the chuck pushes the gripping part to grip the workpiece.
- the workpiece can be configured to be held under a second pressing force that is smaller than the pressure.
- the drive mechanism operates in a direct motion with respect to the bidirectional drive member, thereby selectively exerting forward drive force and reverse drive force on the bidirectional drive member.
- the bidirectional drive member converts the linear motion of the linear motion member into a swing motion, and selects the forward drive force and the reverse drive force for the operating member by the action of the lever. Can be configured to be added automatically.
- the present invention further provides an automatic lathe having a spindle incorporating the material gripping device described above.
- the present invention further relates to a material guide device, a cylindrical guide bush having a material support portion that can be opened and closed, an operating member that opens and closes the material support portion, and an operating member under a pressing force. It is equipped with a drive mechanism that moves between a closed position for centering and supporting the work material on the material support part and an open position for releasing the work material on the material support part by releasing the pressing force. The mechanism alternatively applies a forward direction driving force that moves the actuating member from the open position to the closed position and a reverse direction driving force that moves the actuating member from the closed position to the open position.
- a material guide device including a driving member is provided.
- the present invention further provides an automatic lathe in which the material guide device described above is installed in the vicinity of the processing position of the material to be processed.
- FIG. 1 is a cross-sectional view showing a material gripping device according to a first embodiment of the present invention equipped with a stationary chuck incorporated in a main spindle of an automatic lathe, showing a state in which an operating member is in an open position,
- Fig. 2 is a cross-sectional view of the material gripping device of Fig. 1 equipped with a stationary chuck, showing the operating member in the closed position,
- Fig. 3 shows a cross section of the material gripping device of Fig. 1 equipped with a movable chuck.
- the figure which shows the state in which an action
- Fig. 4 is a cross-sectional view of the material gripping device of Fig. 1 equipped with a movable chuck, showing the operating member in the closed position,
- Fig. 5 A is a cross-sectional view of the stationary chuck installed in the material gripping device of Fig. 1.
- Fig. 5B is a cross-sectional view of the movable chuck installed in the material gripping device of Fig. 1.
- Fig. 6 is a cross-sectional view of the material gripping device of Fig. 1 equipped with a stationary rod chuck, showing the state where the actuating member is in an intermediate position,
- Fig. 7 is a cross-sectional view of the material gripping device of Fig. 1 equipped with a movable chuck, and shows a state where the actuating member is in an intermediate position
- Figure 8 shows the material holding apparatus according to the second embodiment of the present invention equipped with a stationary chuck, a cross sectional view illustrating incorporated in the automatic lathe spindle, the Jo 1 state the actuating member is in the opening-position Figure,
- Fig. 9 is a cross-sectional view of the material gripping device of Fig. 8 equipped with a stationary chuck, and shows a state in which the operating member is in the closed position
- Fig. 10 is a cross-sectional view of the material gripping device of Fig. 8 equipped with a movable chuck, and shows a state in which the operating member is in the open position
- Fig. 11 is a cross-sectional view of the material gripping device of Fig. 8 equipped with a movable chuck, showing the operating member in the closed position,
- Fig. 12 is a cross-sectional view of the material gripping device of Fig. 8 equipped with a stationary chuck, showing the operating member in an intermediate position.
- Fig. 13 is a cross-sectional view of the material gripping device of Fig. 8 equipped with a movable chuck, and shows a state where the actuating member is in an intermediate position.
- Fig. 14 is a cross-sectional view showing a material guide device according to an embodiment of the present invention equipped with a stationary guide bush incorporated in the main spindle of an automatic lathe, showing the operating member in the open position.
- Fig. 15 is a cross-sectional view of the material guide device of Fig. 14 equipped with a stationary guide bush, showing the operating member in the closed position
- Fig. 1 6.
- Fig. 14 is a cross-sectional view of the material guide device of Fig. 14 equipped with a guide bush, showing the operating member in the open position.
- Fig. 17 shows the material guide of Fig. 14 equipped with a movable guide bush.
- Fig. 18 is a cross-sectional view of the device showing the operating member in the closed position.
- Fig. 18 is a cross-sectional view of the material guiding device of Fig. 14 equipped with a stationary guide bush. 2 Diagram showing ⁇ ! Inu, in the closed position, and
- FIG. 19 is a cross-sectional view of the material guide device of FIG. 14 equipped with a movable guide bush, showing the state that the actuating member is in the second closed position.
- FIGS. 3 and 4 show a material gripping device 10 equipped with a movable chuck 14 B.
- the material gripping device 10 opens and closes a cylindrical chuck 14 having a gripping portion 16 that can be opened and closed (collectively referring to chucks 14 A and 14 B) and a gripping portion 16 of the chuck 14
- the operating member 1 8 to be moved and the operating member 1 8 to be gripped by releasing the pressing force from the closed position (FIGS.
- the drive mechanism 20 includes a forward drive force F 1 that moves the actuating member 18 from the open position to the close position, and a reverse drive force F 2 that moves the actuating member 18 from the close position to the open position. Both the forward drive force F 1 and the reverse drive force F 2 can be selected and applied to the actuating member 18.
- the spindle 12 is a hollow cylindrical body having a central axis 1 2 a, and is rotatably mounted on a spindle head 2 2 of an automatic lathe via a bearing device 2 4, and is driven to rotate such as a servomo Connected to a source (not shown) (Fig. 1, Fig. 3).
- a rod-shaped workpiece material W (hereinafter referred to as “bar material W”) is fed in the axial direction from the rear end (right end in the figure) of the main shaft 1 2,
- the main shaft 12 is rotationally driven by the rotational driving source about the axis 12a while the bar W is firmly gripped by the chuck 14 by the operation.
- the main shaft 12 functions as a cylindrical support member (a constituent element of the material gripping device 10) that accommodates and supports the operating member 18 of the material gripping device 10 so as to be relatively movable in the axial direction.
- the chuck 14 (14 A and 14 B) is a hollow cylindrical body that can receive the bar W supplied to the main shaft 12 therein, and has a cylindrical body 2 having a central axis 26a. 6 and an elastically deformable gripping portion 16 that is provided coaxially adjacent to the cylindrical body 26 in the axial direction (Fig. 5A, Fig. 5) 5 B).
- a plurality of (3 in the illustrated embodiment) slits 28 extending in the axial direction from the axial front end face 16 a to a desired length are formed on the gripping portion 16 of the chuck 14.
- the gripping portion 16 is provided with a slit structure that can elastically change the inner diameter with reference to the central axis 26 a of the cylindrical body 26.
- a substantially cylindrical bar gripping surface 30 having a smaller diameter than the inner peripheral surface of the cylindrical body 26 is formed as the inner peripheral surface of the slit structure.
- a frustoconical pressure receiving surface 3 2 extending from the outer peripheral surface of the cylindrical body 26 is gradually formed as the outer peripheral surface of the slit structure.
- the gripping part 16 receives elastic pressure from the pressure receiving surface 3 2 uniformly inward in the radial direction, elastically pinching from the initial open position, and the bar gripping surface 30 is contracted.
- the bar W is firmly and firmly held by the holding surface 30.
- the stationary chuck 14 A (Fig. 5 A) exerts a gripping force by displacing the actuating member 1 8 in the main shaft 12 2 in the pushing direction (left side in Fig. 1).
- an annular groove 36 is provided in the chuck 14 A along the outer peripheral surface of the extended portion extending in the axial direction from the contact surface 34.
- the front end of the main spindle 1 2 (left end in Fig. 1) can be engaged with the contact surface 3 4 of the chuck 1 4 A.
- Annular cap with face 3 8 inside 4 0 force Removably attached.
- the chuck 14 A moves relative to the cap 40 in the axial direction via an annular stopper 42 fitted in the annular groove 36. It is connected so that it can move in the radial direction.
- the contact surface 3 4 of the chuck 14 A and the cap 40 are locked.
- the surface 3 8 is in intimate contact with the chuck, thereby moving the chuck member 18 from the open position to the closed position.
- annular stopper 4 2 may cause the chuck 14 A to be pulled into the main shaft 12 together with the actuating member 18 while the actuating member 18 is moved from the closed position to the open position. And prevent.
- Such pull-in operation is due to the fact that the chuck 14 A is acting like a wedge between the bar W and the actuating member 18 when the actuating member 18 is in the closed position.
- Annular Stopper 4 2 Force Ensure that this undesired retraction is prevented.
- the movable chuck 14 B (Fig. 5 B) exerts a gripping force by displacing the actuating member 18 in the main shaft 12 2 in the retracting direction (rightward in Fig. 3).
- a male screw 44 is formed on the outer peripheral surface adjacent to the opening at the rear end in the axial direction of 26 (right end in the figure).
- the male screw 4 4 is screwed onto a female screw 4 6 (FIG. 3), which will be described later, provided on the actuating member 18.
- the chuck 1 4 B is detachably attached to the actuating member 1 8.
- the chuck 14 B integrally follows the axial movement of the actuating member 18, It moves in the axial direction within the main shaft 1 2.
- the actuating member 18 includes a first cylindrical element 48 that selectively receives the forward drive force F 1 and the reverse drive force F 2 from the drive mechanism 20 (see Figs.
- the first cylindrical element 48 is a hollow cylindrical body that can receive the rod W supplied to the main shaft 12 in a non-contact manner, and has an axial front end (the left end in the figure).
- the above-described female screw 46 that can be screwed onto the male screw 44 of the movable chuck 14 B is formed.
- the first cylindrical element 48 is accommodated in a concentric arrangement so as to be axially movable on the main shaft 12, and a predetermined length portion 50 on the rear side in the axial direction (right side in the drawing) is disposed behind the main shaft 12. Projected from the end opening to the outside.
- the actuating member 18 further includes a second tubular element 5 2 that receives and supports the stationary chuck 14 A so as to be movable relative to the axial direction (FIG. 1).
- the second cylindrical element 52 is a hollow cylindrical body that can similarly receive the rod W received in the first cylindrical element 48 in a non-contact manner, and is at the rear end in the axial direction (the right end in the figure).
- a male screw 5 4 that can be screwed onto the female screw 4 6 of the first tubular element 48 is formed. That is, the male thread 54 of the second cylindrical element 52 has the same configuration as the male thread 44 of the movable chuck 14 B.
- the second cylindrical element 52 can be replaced with the movable chuck 14 B, and can be attached to the first cylindrical element 48 so as to be detachable by being aligned in the axial direction.
- the second cylindrical element 52 accommodates the static chuck 14'A cylindrical body 2 6 in the axially forward (leftward in the figure) area so that it can slide in the axial direction. .
- a frustoconical action that can be engaged with the pressure receiving surface 3 2 provided on the gripping portion 16 of the chuck 14 A
- Surfaces 5 and 6 are formed (FIG. 1).
- the working surface 56 extends from the front end of the second tubular element 52 with a gradually reduced diameter toward the rear in the axial direction.
- the inner diameter dimension of the large diameter end of the working surface 5 6 is slightly smaller than the outer diameter dimension of the large diameter end of the pressure receiving surface 3 2 of the pressure receiving surface 3 2 of the chuck 14 A.
- the working surface 56 constitutes a pressure surface that is brought into contact with the pressure receiving surface 32 at least in an annular shape.
- the second cylindrical element 5 2 is connected to the first cylindrical element 4 8 of the actuating member 1 8 with the male screw.
- 5 4 is attached to the female screw 4 6 by screwing, and then the cylindrical body 2 6 of the chuck 14 A connected to the cap 40 via the annular stopper 4 2 is connected to the second cylindrical element 5 2.
- the cap 40 is attached to the main shaft 12 by, for example, screwing (FIG. 2) a male screw 58 provided at the front end of the main shaft 12 and a female screw 59 provided at the rear end of the cap 40.
- the chuck 14 A and the actuating member 1 8 (first cylindrical element 48 and second cylindrical element 14 5 2) is arranged concentrically with the main shaft 12, and the chuck 14 A is held stationary in the main shaft 12 in the axial direction while the actuating member 18 moves axially within the main shaft 12.
- a well-known detent is provided between the main shaft 1 2 and the second cylindrical elements 5 and 2 and between the second cylindrical element 5 2 and the chuck 14 A.
- the chuck 14 A The actuating member 1 8 rotates integrally with the main shaft 1 2.
- the chuck 1 4 B and the male screw 4 4 are connected to the female screw 4 6 to the first cylindrical element 48 of the actuating member 18. It is only necessary to attach it by screwing it onto.
- the second cylindrical element 5 2 of the actuating member 1 8 is not used, and the main shaft (ie, the supporting member) 1 2 is axially forward (left in the figure).
- the cylindrical body 2 6 of the movable chuck 14 B is accommodated in a concentric arrangement so as to be slidable in the axial direction.
- a frustoconical action surface 6 0 that can be engaged with the pressure receiving surface 3 2 provided on the gripping portion 16 of the chuck 14 B. Is formed (Fig. 3).
- the working surface 60 extends gradually from the front end of the main shaft 12 toward the rear in the axial direction.
- the inner diameter of the large-diameter end of the working surface 60 is determined by the gripping part 16 in the open state of the chuck 14 B.
- the pressure receiving surface 3 2 is slightly smaller than the outer diameter of the large diameter end, so that the working surface 60 constitutes a pressure surface that is at least annularly abutted against the pressure receiving surface 3 2. .
- the chuck 14 B and the actuating member 18 (first cylindrical element 4 8) are attached to the spindle 12.
- the chuck 14 4 B moves together with the actuating member 1 8 in the axial direction while the actuating member 18 moves in the axial direction within the main shaft 12.
- a well-known detent is provided between the main shaft 12 and the chuck 14 B so that the chuck 14 B and the actuating member 18 rotate integrally with the main shaft 12.
- the material gripping device 10 can be installed by appropriately replacing the stationary chuck 14 A and the movable chuck 14 B.
- the stationary chuck 14 A corresponds to the configuration of the actuating member push-out type
- the movable chuck 14 B corresponds to the configuration of the actuating member retracting type.
- the operation of the operating member for opening the chuck is changed as in the chuck operating mechanism in the material gripping device described in JP-B-2 5 6 6 5 70 described above.
- the configuration realized by when the stationary chuck and the moving chuck are replaced without changing the chuck operating mechanism, the chuck is closed with respect to one of the chucks. Therefore, the driving force of the actuating member depends on the elastic biasing force of the return spring, and it becomes difficult to stably obtain the necessary gripping force.
- the drive mechanism 20 is moved from the open position (that is, the material gripping position by the chuck 14) to the closed position (that is, the chuck 1). 4)
- the forward direction driving force F 1 to move to the material release position and the actuating member 1 8 are closed. It is possible to generate both the reverse drive force F 2 that moves from the moving position to the open position, and select either the forward drive force F 1 or the reverse drive force F 2 and apply it to the actuating member 18. It is structured so that it can be done.
- the forward driving force F 1 and the reverse driving force F 2 The drive mechanism 2 0 that selectively applies the pressure to the actuating member 1 8 closes the actuating member 18 from the open position for both the static chuck 14 A and the movable chuck 14 B.
- the positive direction driving force F 1 (moving in the opposite direction with respect to each of the chucks 14 A and 14 B) can be surely exerted.
- the necessary gripping force can be stably obtained in any of the chucks 14 A and 14 B. be able to.
- the drive mechanism 20 is a swingable bidirectional drive member 6 2 that selectively applies a forward drive force F 1 and a reverse drive force F 2 to the first cylindrical element 4 8 of the actuation member 18. And a linear motion member that allows the bidirectional drive member 62 to alternatively exert the forward direction drive force F 1 and the reverse direction drive force F 2 by moving linearly relative to the bidirectional drive member 62. 6 4 and a drive source 6 6 that reciprocates the linear motion member 6 4 in a direction along the axis of the first cylindrical element 48 (matching the axis 12a of the main shaft 12).
- a cylindrical mounting member 6 8 is fixedly installed so as to surround the protruding length portion 50 of the first cylindrical element 4 8 of the actuating member 1 8.
- the bidirectional driving member 62 and the linear motion member 64 are supported on the member 68 so as to be swingable and linearly movable. Further, the projecting long portion 50 of the first cylindrical element 48 of the actuating member 18 is partially surrounded by the mounting member 68. 0
- a cylindrical transmission member 70 that engages with the bidirectional driving member 62 and transmits the driving force to the first cylindrical element 48 is fixedly installed at the position where it is trapped.
- the bi-directional drive member 6 2 has an arm 7 2 that forms a force point at both ends 7 2 a and 7 2 b, and is protruded to one side substantially at the center of the arm 7 2, and a pair of projecting ends 7 4 a and 7 4 A substantially Y-shaped lever element that has a protrusion 7 4 that forms the point of action on b, and rotates to the mounting member 6 8 with a support shaft 7 6 installed at the center of the arm 7 2 as a fulcrum. Installed as possible.
- the mounting member 6 8 fixed to the main shaft 12 has a plurality of (two in the illustrated embodiment) cavities 7 8 penetrating in the radial direction, one for each of the cavities 7 8, both
- the direction drive member 62 is accommodated in a swingable manner.
- Each bidirectional drive member 62 has its arm 72 oriented parallel to the axis of the first cylindrical element 48 (that is, the axis 12a of the main shaft 12), and the protrusion 74 is the first cylindrical shape. Arranged towards the side close to element 48.
- each bidirectional drive member 62 has at least one end 7 2 a and 7 2 b of the arm 7 2 that is radially outward from the hollow portion 78 of the mounting member 6 8 according to the swinging motion thereof. In addition to projecting, either one of the ends 7 2 a and 7 2 b is completely drawn into the cavity 7 8.
- a driving force proportional to the swinging force (forward driving force F 1 and reverse driving force F 2) is selectively applied in the direction along the axis 1 2 a of the main shaft 12. available.
- the linear motion member 64 is a hollow cylindrical member that is supported so as to be reciprocally movable in the axial direction along the outer surface of the mounting member 68, and changes the inner diameter dimension along the axial direction on the inner peripheral surface thereof.
- a cylindrical cam surface 82 is formed.
- the cam surface 8 2 has a smooth main surface portion 8 2 a that maintains the same inner diameter dimension over a predetermined length in the middle of the axial direction, and the main surface portion toward the front end in the axial direction (the left end in the figure).
- the cam surface 8 2 of the linear motion member 6 4 surrounds the mounting member 6 8 in an annular shape and uniformly faces all the hollow portions 78, and at least the arms 7 2 of the individual bidirectional drive members 6 2 One end 7 2 a and 7 2 b are arranged to be slidably engaged.
- the linear motion member 64 is connected to the drive source 66 via a bearing device 84 so as to be relatively rotatable.
- the drive source 6 6 is composed of a hydraulic device, a cam device, a heat pump and the like, and the outer periphery of a mounting member 6 8 that fixes the linear member 6 4 to the main shaft 12 2 under the control of a control device (not shown). Move along the surface in the axial direction within a predetermined reciprocating range.
- each of the bidirectional drive members 62 converts the linear motion of the linear motion member 6 4 into the swing motion described above, and the transmission member 70 (that is, the actuation member) by the action of the lever.
- the forward direction driving force F 1 and the backward direction driving force F 2 are added alternatively to 1 8).
- the drive mechanism 20 having the above configuration rotates at high speed together with the main shafts 1 and 2 except for the drive source 6 6, the bidirectional drive member 6 2, the linear motion member 6 4, the mounting member 6 8, and the transmission member 7 0 is preferably arranged in a well-balanced manner around the axis 12 of the main shaft 12.
- each bidirectional drive member 6 2 engages the front end 7 2 a of each arm 7 2 with the main surface portion 8 2 a of the cam surface 8 2 of the linear motion member 6 4, and The rear end 7 2 b of 7 2 is disposed rearwardly away from the cam surface 8 2 (FIG. 1).
- each bidirectional drive member 62 has its rear protrusion 7 4 b abutted against the wall surface of the recess 80 of the transmission member 70, and thereby the transmission member 70.
- an axial rearward driving force (reverse driving force F 2) is applied.
- the transmission member 70 transmits the reverse driving force F 2 to the first cylindrical element 48 of the actuating member 1 8, so that the first cylindrical element 48 is integrated with the second cylindrical element 52.
- the actuating member 18 is disposed at the open position, and the gripping portion 16 of the chuck 14A is opened.
- the bar W is fed into the working member 1 8 from the rear of the spindle 1 2 and the desired length of the tip of the bar W is checked. Project from the opening of the front end of the gripping part 16 of A. From this state, the drive source 66 of the drive mechanism 20 is activated, and the linear motion member 64 is moved rearward in the axial direction along the outer peripheral surface of the attachment member 68.
- each bi-directional drive member 6 2 is separated from the main surface portion 8 2 a of the cam surface 8 2, while the rear end of the arm 7 2 of each bi-directional drive member 6 2 7 2 b
- the cam surface 8 2 is engaged with the main surface portion 8 2 a via the second tapered surface portion 8 2 c. Accordingly, the individual bidirectional driving members 6 2 are synchronized with each other, and the rear end 7 2 b of the arm 7 2 is attached to the mounting member 6 8 from the swinging position in FIG. Swings in the direction of being drawn into the cavity 7 8.
- each bi-directional drive member 62 is brought into contact with the wall surface of the recess 80 of the transmission member 70 at the front end 74a of the projection 74, and is transmitted under the action of the lever.
- Axial forward drive force on member 70 (forward drive force
- the transmission member 70 receives the positive direction driving force F 1 as the actuating member 1
- the chuck 14 A is disposed so as not to move in the axial direction with respect to the main shaft 12 by the cap 40 as described above. Therefore, the working surface 5 6 of the second cylindrical element 5 2 of the actuating member 1 8 is accurately pressed against the pressure receiving surface 3 2 of the chuck 14 A, and the required pressing force is applied to the pressure receiving surface 3 2. Added. As a result, the gripping portion 16 of the chuck 14 A elastically contracts as described above, and when the actuating member 18 reaches the closed position, the chuck 14 A moves to its bar gripping surface 3. At 0 (Fig. 5A), the bar W is firmly gripped with the required gripping force (Fig. 2). In this state, the spindle 1 2 rotates and the desired turning process is performed on the bar W.
- each bidirectional drive member 62 is synchronized with each other in the direction in which the front end 7 2 a of the arm 72 is drawn into the hollow portion 78 of the mounting member 68 from the swinging position of FIG. Swing.
- each bidirectional drive member 62 is brought into contact with the wall surface of the recess 80 of the transmission member 70 at the rear end 7 4 b of the projection 7 4, and under the action of the lever, A driving force (reverse driving force F 2) in the axial direction rearward is applied to the transmission member 70.
- the transmission member 70 transmits the reverse driving force F 2 to the first cylindrical element 4 8 of the actuating member 18 as it is, so that the first cylindrical element 48 is connected to the second cylindrical element 52. Moves backward in the axial direction within the main shaft 12 as a unit.
- each bidirectional driving member 6 2 engages the rear end 7 2 b of each arm 7 2 with the main surface portion 8 2 a of the force surface 8 2 of the linear motion member 6 4.
- the front end 7 2 a of the arm 7 2 is disposed so as to be spaced forward from the cam surface 8 2 (FIG. 3).
- each bidirectional drive member 62 has its front protrusion 7 4 a abutted against the wall surface of the recess 80 of the transmission member 70, and thereby the transmission member 70.
- a driving force forward in the axial direction (reverse driving force F 2) is applied.
- the transmission member 70 transmits the reverse direction driving force F 2 to the actuating member 1 8.
- ⁇ 1 The cylindrical element 48 is transmitted to the first cylindrical element 48 so that the first cylindrical element 48 is integrated with the chuck 14 B at the front end of the axial movement range in the main shaft 12.
- the actuating member 18 is placed in the open position, and the gripping portion 16 of the chuck 14B is opened.
- each bidirectional drive member 6 2 is moved in the axial direction along the outer peripheral surface of the mounting member 6 8. Then, the arm of each bidirectional drive member 6 2 is separated from the main surface portion 8 2 a of the cam surface 8 2, while the rear end 7 2 b of the arm 7 2 of each bidirectional drive member 62
- each bidirectional driving member 62 is brought into contact with the wall surface of the recess 80 of the transmission member 70 at the rear end 74b of the projecting member 74, and under the action of the lever, A driving force backward in the axial direction (forward driving force F 1) is applied to the transmission member 70.
- the transmission member 70 transmits the forward driving force F 1 as it is to the first cylindrical element 48 of the actuating member 18, so that the first cylindrical element 48 is integrated with the chuck 14 B. Moves backward in the axial direction within the main shaft 1 2.
- each bi-directional drive member 62 is brought into contact with the wall surface of the recess 80 of the transmission member 70 at the front end 7 4a of the projection 74, and is transmitted under the action of the lever.
- a driving force forward in the axial direction (reverse driving force F 2) is applied to the member 70.
- the transmission member 70 transmits the reverse driving force F 2 as it is to the first cylindrical element 48 of the actuating member 18, so that the first cylindrical element 48 is integrated with the chuck 14 B integrally. Move forward in the axial direction within the main shaft 1 2.
- the chuck 1 4 B is pushed out of the main shaft 1 2 by the actuating member 1 8, and the pressure receiving surface 3 2 of the chuck 1 4 B is Detach from the working surface 60 of the main shaft 1 2 reliably.
- the pressing force from the working surface 60 of the spindle 12 to the pressure receiving surface 32 of the chuck 14 B is released, and the gripping portion 16 of the chuck 14 B is elastically expanded as described above.
- the actuating member 1 8 reaches the open position, the chuck 1 4 B completely completes the bar W (Fig. 3).
- the positive direction driving force F 1 of the driving mechanism 20 for closing the gripping portion 16 of the stationary chuck 14 A and the movable chuck 14 B The forward direction driving force F 1 of the drive mechanism 20 for closing the gripping portion 16 of this is thrust applied to the operating member 18 in the opposite directions. Also, the positive direction driving force F 1 of the drive mechanism 20 for closing the gripping part 16 of the stationary chuck 14 A and the gripping part 16 of the movable chuck 14 B are opened.
- the reverse direction driving force F 2 of the driving mechanism 20 is the thrust applied to the actuating member 1 8 in the same first direction (forward in the axial direction), and the stationary chuck 1 4 A gripping part 1 6
- the reverse drive force F 2 of the drive mechanism 20 for opening the opening mechanism and the forward drive force F 1 of the drive mechanism 20 for closing the gripping part 16 of the movable chuck 14 B are: This is the thrust applied to the actuating member 1 8 in the same second direction (backward in the axial direction). Due to the bidirectional driving characteristics of the drive mechanism 20, the material gripping device 10 can provide the necessary gripping force for both the stationary chuck 14 A and the movable chuck 14 B. It can be obtained stably.
- the drive mechanism 20 and the first cylindrical element 48 of the actuating member 18 that receives the drive force from the drive mechanism 20 are installed on the main shaft 12.
- the configuration of the operating member extrusion mold using the stationary chuck 14 A and the movable type The configuration of the retractable working member type using the chuck 14 B can be realized alternatively. Therefore, in the material gripping device 10, the structure of the chuck operating mechanism is considered in consideration of the machine configuration of the machine tool (automatic lathe), the material of the workpiece (bar material W) to be machined, the required machining accuracy, etc. Can be easily changed as a result, resulting in increased equipment costs and work Multi-use of the material gripping device 10 can be realized while preventing the burden on the user.
- the material gripping device 10 mounted on the automatic lathe when used in the configuration of an operating member extrusion mold having a static chuck 14 A, as described, a high level in the axial direction of the bar W there is an advantage that machining dimensional accuracy is ensured.
- the driving mechanism 20 force operating member 18 can be configured to be positioned at an intermediate position between the closing position and the opening position.
- the drive source 6 6 of the drive mechanism 20 is controlled so that the linear motion member 6 4 is disposed on the mounting member 6 8 at an appropriate intermediate position within the reciprocating movement range.
- One of the two arms 7 2, one end 7 2 a, 7 2 b is connected to either the first or second taper surface portion 8 2 b, 8 2 c of the cam surface 8 2 of the linear motion member 6 4 By engaging with either one of them, the intermediate position of the actuating member 18 can be secured.
- the linear motion member 6 4 has a front end 7 2 a of the arm 7 2 of each bi-directional drive member 6 2 separated from the cam surface 8 2, while the arm 7 2 of each bi-directional drive member 6 2
- the rear end 7 2 b passes through a position where it engages with the second tapered surface portion 8 2 c of the cam surface 8 2.
- each bidirectional drive member 6 2 slightly slides on the second taper surface portion 8 2 c of the cam surface 8 2, so that each bidirectional drive member 6 2
- the linear motion member 64 is held in a position where they are slightly swung in synchronization with each other.
- each bidirectional drive member 62 is Under the action of the lever, a driving force forward in the axial direction is applied to the transmission member 70, so that the actuating member 18 (the first cylindrical element 48 and the second cylindrical element 5 2) is moved to the chuck 14 A. On the other hand, it moves slightly forward in the axial direction within the main shaft 12 and reaches the intermediate position.
- the actuating member 1 8 is in the intermediate position, the working surface 5 6 of the second cylindrical element 5 2 is pressed slightly lightly against the pressure receiving surface 3 2 of the chuck 1 4 A, so that the chuck 1 4 A
- the gripping part 16 holds the bar W under a second pressing force that is smaller than the necessary pressing force described above for causing the gripping part 16 to grip the bar W firmly.
- the gripping force generated in the gripping portion 16 of the chuck 14A under the pressing force when the actuating member 18 is in the closed position is applied to the bar W made of a solid rigid body.
- the actuating member 1 8 is arranged at an intermediate position, and a smaller second A hollow tubular body or a rod W made of a soft material can be gripped without being deformed by the gripping force generated in the gripping portion 16 of the chuck 14 A under the pressing force.
- each bidirectional driving member 62 is slightly slid on the first taper surface portion 8 2 b of the cam surface 8 2, and each bidirectional driving member The linear motion member 6 4 is held at a position where 6 2 is slightly swung in synchronization with each other.
- each bidirectional drive member 62 is Under the action of the lever, a driving force in the axial direction rearward is applied to the transmission member 70, so that the actuating member 18 (first cylindrical element 4 8) moves together with the chuck 14 B along the axis 12 within the main shaft 12. Move slightly backward in the direction to reach the middle position.
- the actuating member 1 8 is in the intermediate position, the pressure receiving surface 3 2 of the chuck 1 4 B is pressed slightly lightly against the working surface 6 0 of the spindle 1 2, so that the gripping part 1 6 of the chuck 1 4 B
- the bar W is held under a second pressing force that is smaller than the required pressing force described above for causing the gripping part 16 to firmly hold the bar W.
- FIGS. 8 to 11 are views showing a material gripping device 90 according to a second embodiment of the present invention incorporated in a main spindle 12 of an automatic lathe, and FIGS. 8 and 9 are stationary chucks.
- 14 shows a material gripping device 90 equipped with 4A
- FIGS. 10 and 11 show a material gripping device 90 equipped with a movable chuck 14B.
- the material gripping device 90 is the same as that described above, except that the biasing member provided in association with the stationary chuck 14 A and the biasing member provided in association with the drive mechanism 20 are additionally provided.
- the material gripping device 10 according to the first embodiment has substantially the same configuration. Therefore, corresponding constituent elements are denoted by common reference numerals and description thereof is omitted.
- the chuck 14 A and the second cylindrical element 5 2 of the working member 18 are replaced with the annular stopper 4 2 described above.
- An urging member 9 2 is installed that elastically urges both of the two so that the former pressure receiving surface 3 2 is separated from the latter acting surface 56.
- the urging member 92 can be formed, for example, from a compression coil spring interposed between the rear end surface of the chuck 14 A and the rear end wall of the second cylindrical element 52 as shown in the figure.
- the biasing member 9 2 closes the actuating member 1 8 (first cylindrical element 48 and second cylindrical element 5 2) by the reverse direction driving force F 2 of the driving mechanism 20 (see FIG. 9)
- the chuck 14 A is prevented from being dragged by the second cylindrical element 52 and moving backward in the axial direction by the elastic biasing force. Acts as follows. Such dragging operation is such that when the actuating member 18 is in the closed position, the chuck 14 A is acting like a wedge between the bar W and the second cylindrical element 52.
- the first cylinder of the actuating member 18 is further attached to the mounting member 68 fixed to the main shaft 12 to the drive mechanism 20 regardless of the configuration of the chucks 14A and 14B.
- An urging member 94 for elastically urging the transmission member 70 fixed to the element 48 to the rear in the axial direction (rightward in the figure) is installed.
- the urging member 9 4 is provided with a mounting member 6 8 and a transmission member 7 in a space formed between the mounting member 6 8 and the first cylindrical element 4 8 of the operating member 18. It can be formed from a compression coil spring interposed between zero and zero. '
- the biasing member 9 4 that biases the actuating member 18 to the main shaft 1 2 in the axial direction is It acts to assist the reverse direction driving force F 2 by the driving mechanism 20.
- the material gripping device 90 is equipped with a movable chuck 14 B (FIGS. 10 and 11)
- the actuating member 18 is urged rearward in the axial direction with respect to the main shaft 12.
- the urging member 94 acts to assist the positive direction driving force F 1 by the driving mechanism 2 0.
- the urging member 94 moves the actuating member 18 only by the urging force.
- the biasing member 94 is Different functions depending on 4 A and 14 B types. For example, when the material gripping device 10 is equipped with a stationary chuck 14 A, the energizing force is applied while the actuating member 18 is moved from the open position (FIG. 8) to the closed position (FIG. 9). The elastic urging force of the member 94 is applied in a direction against the forward driving force F 1 of the driving mechanism 20.
- the moving member 18 is moved from the open position (Fig. 10) to the closed position (Fig. 11).
- the elastic urging force of the urging member 94 acts in the same direction as the positive direction driving force F 1 of the driving mechanism 20. Therefore, when the actuating member 18 is in the intermediate position, the second pressing force applied to the gripping portion 16 of the chuck 14 B is generated by the elastic biasing force of the biasing member 94. Can be configured.
- the gripping portion 16 of the chuck 14 B holds the bar W under the second pressing force, while each of the two directions of the driving mechanism 20
- the drive member 6 2 is arranged at a swing position where both ends 7 2 a and 7 2 b of the arm 7 2 are separated from the cam surface 8 2 of the linear motion member 6 4. (Fig. 13).
- the gripping force with which the gripping portion 16 of the chuck 14 B grips the bar W is generated only by the elastic biasing force of the biasing member 94.
- the chuck 14 B of the material gripping device 90 is not completely opened. If the actuating member 1 8 is arranged at an intermediate position and the bar 14 is elastically held by the chuck 14 B under the elastic biasing force of the biasing member 94, the main shaft 12 is rotated. In this state, the bar W can be pushed out from the main shaft 12.
- the illustrated material gripping device 90 includes an urging member 9 2 provided in association with the stationary chuck 14 A and an urging member 94 provided in connection with the drive mechanism 20. Both are provided, but either one of the biasing members 9 2, 94 can be omitted. In particular, for the biasing member 94 provided in association with the drive mechanism 20, other known elastic biasing means such as a hydraulic device can be used in place of the compression coil spring.
- FIGS. 14 to 17 are views showing a material guide device 100 according to an embodiment of the present invention installed in the vicinity of a processing work position of a bar W in an automatic lathe
- FIGS. Fig. 15 shows a material guide device 1 0 0 equipped with a stationary guide bush 10 0 2 A, Fig. 1 6 and Fig. 1 7
- a material guide device 1 0 0 equipped with a movable guide bush 1 0 2 B is shown.
- the illustrated material guide device 100 has basically the same configuration as the material gripping device 90 according to the second embodiment described above. Shi Therefore, corresponding constituent elements are denoted by common reference numerals and description thereof is omitted.
- the material guide device 100 is an auxiliary support device that centers and supports the bar w gripped by the chuck 14 of the spindle 12 in the automatic lathe near the machining site at the tip (showing the tool ⁇ ). It is.
- the material guide device 100 is a guide bush 1 0 2 (guide bush 1 0 2 A, 1 0 2 B and the bar W gripped by the spindle 1 2 during the turning process with an automatic lathe. (Generally called) has a rotary type structure that rotates at high speed.
- the present invention is not limited to this, and can also be applied to a fixed-type material guide device in which the guide bushing 10 2 is fixedly arranged with respect to the rod W rotating at high speed.
- the material guide device 1 0 0 is a cylindrical guide bush 1 0 2 having a hollow cylindrical material support portion 1 0 4 that can be opened and closed, and a radial direction of the material support portion 1 0 4 of the guide bush 1 0 2 And an adjustment mechanism for adjusting the dimensions.
- This adjustment mechanism is used to open and close the material support portion 10 0 4 of the guide bush 10 0 2, and the operation member 1 8, and the bar W to the material support portion 1 0 4 under the pressing force.
- a drive mechanism 20 that moves between them.
- the actuating member 18 and the drive mechanism 20 have substantially the same configuration as the actuating member 18 and the drive mechanism 20 in the material gripping devices 10 and 90 described above. That is, the drive mechanism 20 has a forward direction driving force F 1 that moves the operating member 18 from the open position to the closed position, and a reverse direction driving force F 2 that moves the operating member 18 from the closed position to the open position.
- a bidirectional drive member 6 2 is provided for applying to the actuating member 1 8.
- the actuating member 18 moves from the open position to the close position.
- the stationary guide bush 10 0 A that receives the pressing force on the material support 10 4 and the actuating member 1 8 move from the open position to the closed position.
- a movable guide bush 10 0 2 B that moves together with 8 and receives a pressing force on the material support 10 4 can be provided to be exchangeable with each other.
- the material guide device 100 further includes a cylindrical support member 10 6 that accommodates and supports the actuating member 18 so as to be relatively movable in the axial direction.
- the support member 10 06 is a hollow cylindrical body having a central axis 1 0 6 a, similar to the main shaft 1 2 in the material gripping devices 10 0, 90 described above, and in front of the main shaft 12 of the automatic lathe. It is rotatably mounted on an upright column 10 8 via a bearing device 1 1 0 and connected to a rotation drive source (not shown) such as a servo motor (FIGS. 14 and 16).
- Guide bushes 10 2 (1 0 2 A and 1 0 2 B) have substantially the same configuration as chucks 1 4 (1 4 A and 1 4 B) in the material gripping devices 1 0 and 90 described above. . That is, the material support portion 104 of the guide bush 10 2 has a slit structure, and a frustoconical pressure receiving surface 32 is formed on the outer peripheral surface thereof.
- the material support section 10 04 receives the pressing force uniformly inward in the radial direction on the pressure receiving surface 3 2, elastically flexes from the initial open position and shrinks, and supports the bar W centeringly. To do.
- the material support 10 4 When the pressing force on the pressure receiving surface 3 2 is released, the material support 10 4 is elastically restored to the open position and expanded in diameter, and the bar W is released from the material support 10 4. .
- the inner diameter dimension of the material support portion 10 4 can be adjusted by adjusting the external force applied to the material support portion 10 4.
- the stationary guide bush 10 0 2 A has the actuating member 18 (the first cylindrical element 48 and the second cylindrical element 5 2) in the pushing direction (leftward in FIG. 14) in the supporting member 10 6. ) By the material support 1 0 4 Exhibit function. Further, the movable guide bush 10 2 B displaces the actuating member 1 8 (first cylindrical element 4 8) in the retracting direction (rightward in FIG. 16) in the support member 10 6. The centering function by the material support part 1 0 4 is demonstrated.
- the guide bush 1 0 2 A is attached to the front end of the support member 1 0 6 (left end in Fig. 1).
- An annular cap 40 having a locking surface 3 8 that can be engaged with the contact surface 3 4 on the inside is attached so as to be detachable.
- the guide bush 1 0 2 A When the guide bush 1 0 2 A is properly accommodated in the support member 1 0 6 and the cap 4 0 is attached to the front end of the support member 1 0 6, the guide bush 1 under the elastic biasing force of the biasing member 9 2 0 2 A contact surface 3 4 and the locking surface 3 8 of the cap 4 0 are in close contact with each other, so that the guide bush 1 0 moves while the actuating member 1 8 moves from the open position to the closed position. 2 A is prevented from being pushed out of the supporting member 1 0 6 and falling off.
- the biasing member 92 is opened by the guide bush 10 0 2 A being drawn into the support member 10 6 together with the actuating member 1 8 while the actuating member 1 8 is moved from the closing position to the opening position. Prevents defects from occurring.
- the movable guide bush 1 0 2 B When the movable guide bush 1 0 2 B is installed on the material guide device 1 0 0, the external thread 4 4 on the rear end of the guide bush 1 0 2 B is replaced with the internal thread provided on the first cylindrical element 4 8.
- the guide bush 100 B is removably attached to the actuating member 18 by being screwed to 46 (FIG. 16).
- the guide bush 10 0 2 B When the guide bush 10 0 2 B is properly accommodated in the support member 10 6 and connected to the actuating member 18, the guide bush 1 0 2 B integrally follows the axial movement of the actuating member 18, It can move in the axial direction within the support member 10.
- each bidirectional drive member 6 2 engages the front end 7 2 a of each arm 7 2 with the main surface portion 8 2 a of the cam surface 8 2 of the linear motion member 6 4 and the arm.
- the rear end 7 2 b of 7 2 is disposed rearwardly away from the cam surface 8 2 (FIG. 14).
- each bidirectional drive member 62 has its rear protrusion 7 4 b abutted against the wall surface of the recess 80 of the transmission member 70, thereby transmitting the transmission member 70.
- an axial rearward driving force (reverse driving force F 2) is applied.
- the transmission member 70 transmits the reverse driving force F 2 to the first cylindrical element 4 8 of the actuating member 18, so that the first cylindrical element 48 is integrated with the second cylindrical element 5 2.
- it is arranged at the rear end of the axial movement range within the support member 106.
- the actuating member 18 is disposed at the open position, and the material support portion 104 of the guide bush 10 A is opened.
- the bar W is fed from the rear of the support member 10 6 to the inside of the actuating member 1 8, and the desired length of the leading end of the bar W Project from the opening at the front end of the material support 1 0 4 of guide bush 1 0 2 A. From this state, the drive source 6 6 of the drive mechanism 20 is turned off. The linear motion member 6 4 is moved to the rear in the axial direction along the outer peripheral surface of the mounting member 6 8.
- the front ends of the arms 7 2 of the two-way drive members 6 2 7 a are disengaged from the main surface portion 8 2 a of the cam surface 8 2, while the arms 7 2 of the two-way drive members 6 2
- the end 7 2 b engages with the second tapered surface portion 8 2 c of the cam surface 8 2.
- the individual bidirectional drive members 6 2 are synchronized with each other in the direction in which the rear end 7 2 b of the arm 7 2 is drawn into the hollow portion 7 8 of the mounting member 6 8 from the swing position in FIG. It swings slightly.
- each bidirectional drive member 62 is brought into contact with the wall surface of the recess 80 of the transmission member 70 at the front end 7 4 a of the projection 7 4, and under the action of the lever.
- a driving force forward in the axial direction (forward driving force F 1) is applied to the transmission member 70.
- the actuating member 18 (the first cylindrical element 48 and the second cylindrical element 52) moves slightly forward in the axial direction within the support member 106 relative to the guide bush 10 02A. To reach the closed position.
- the urging member 94 installed in the drive mechanism 20 is caused to move the rear end 7 2 b of the arm 7 2 of each bidirectional drive member 62 by the elastic urging force. Since it acts to press against the second taper surface portion 8 2 c of the cam surface 8 2, rattling of the bidirectional drive member 6 2 is eliminated.
- the drive source 6 6 is started again, and the linear motion member 6 4 is moved forward in the axial direction along the outer peripheral surface of the mounting member 6 8.
- each bidirectional drive member 6 2 is detached from the second tapered surface portion 8 2 of the cam surface 8 2, while the arm 7 of each bidirectional drive member 6 2 Front end of 2 7 2 a force Engages with main surface portion 8 2 a of cam surface 8 2. Accordingly, the individual bi-directional drive members 6 2 are synchronized with each other and slightly moved from the swinging position in FIG. 15 in the direction in which the front end 7 2 a of the arm 7 2 is drawn into the cavity portion 7 8 of the mounting member 6 8. Swing around.
- each bi-directional drive member 62 is brought into contact with the wall surface of the recess 80 of the transmission member 70 at the rear projecting end 7 4 b of the projecting member 7 4. Then, a driving force backward in the axial direction (reverse driving force F 2) is applied to the transmission member 70.
- the actuating member 18 (the first cylindrical element 48 and the second cylindrical element 52) moves slightly rearward in the axial direction within the support member 106 relative to the guide bush 10 02A. To reach the open position.
- each bidirectional drive member 6 2 engages the rear end 7 2 b of each arm 7 2 with the main surface portion 8 2 a of the cam surface 8 2 of the linear motion member 6 4,
- the front end 7 2 a of the arm 7 2 is disposed so as to be spaced forward from the cam surface 8 2 (FIG. 16).
- each bidirectional drive member 62 has its front protrusion 7 4 a abutted against the wall surface of the recess 80 of the transmission member 70, and thereby the transmission member 70.
- Axial forward driving force (reverse driving force F 2 ) Is added.
- the transmission member 70 transmits the reverse driving force F 2 to the first cylindrical element 48 of the actuating member 18, so that the first cylindrical element 48 is integrated with the guide bush 10 0 2 B.
- the support member 10 6 is disposed at the front end of the axial movement range within the support member 106.
- the actuating member 18 is disposed at the open position, and the material support portion 10 4 of the guide bush 10 2 B is opened.
- the bar W is fed from the rear of the support member 10 6 into the actuating member 18 and the desired length of the leading end of the bar W Project from the opening at the front end of the material support 1 0 4 of guide bush 1 0 2 B. From this state, the drive source 6 6 of the drive mechanism 20 is activated, and the linear motion member 64 is moved forward in the axial direction along the outer peripheral surface of the attachment member 68.
- each bidirectional drive member 6 2 is detached from the main surface portion 8 2 a of the cam surface 8 2, and the front end of the arm 7 2 of each bidirectional drive member 6 2
- the linear motion member 6 4 is arranged at a position where 7 2 a does not engage with the cam surface 8 2.
- the guide in the closed position Bushing 1 0 2 B guides and supports bar W Wing material support part 1 0 4 of guide bush '1 0 2 B in response to fluctuations in outer diameter due to axial movement of bar It can be passively opened and closed under the elastic biasing force of the member 94 (that is, the actuating member 18 can be moved passively).
- the drive source 6 6 is activated again and the linear motion member 6 4 is moved rearward in the axial direction along the outer peripheral surface of the mounting member 6 8.
- each bidirectional drive member 62 is engaged with the main surface portion 8 2 a via the second taper surface portion 8 2 c of the cam surface 8 2. Accordingly, the individual bidirectional drive members 6 2 are synchronized with each other in the direction in which the rear end 7 2 b of the arm 7 2 is drawn into the cavity portion 7 8 of the mounting member 6 8 from the swing position in FIG. It swings slightly.
- each bidirectional drive member 62 is brought into contact with the wall surface of the recess 80 of the transmission member 70 at the front end 7 4 a of the projection 7 4, and under the action of the lever.
- a driving force forward in the axial direction (reverse driving force F 2) is applied to the transmission member 70.
- the actuating member 1 8 (first cylindrical element 4 8) is piled on the urging force of the urging member 9 4 integrally with the guide bush 10 2 B, and the axis line in the support member 10 6 Move slightly forward in the direction to reach the open position.
- the drive mechanism 20 can be configured so that the actuating member 18 can be positioned at the second closing position further away from the opening position than the closing position. it can.
- the drive source 6 6 of the drive mechanism 20 is controlled so that the linear motion member 6 4 is disposed on the attachment member 6 8 at the other end position of the reciprocating movement range, and each bidirectional drive member 6 2
- the second closing motion of the actuating member 1 8 is achieved.
- the position can be secured.
- the actuating member 18 is moved from the open position (Fig. 14) to the closed position (Fig. 15). After that, as shown in FIG. 18, the linear motion member 6 4 is further moved rearward in the axial direction, and the rear end 7 2 b of each arm 7 2 of each bidirectional drive member 62 is connected to the cam surface 8 2. Engage with main surface part 8 2 a.
- each bidirectional drive member 62 applies a driving force forward in the axial direction to the transmission member 70 under the action of the above-described lever, thereby operating member 18 (first The cylindrical element 48 and the second cylindrical element 5 2) move forward in the axial direction within the support member 106 with respect to the guide bush 10 02 A and reach the second closed position.
- the material support part 1 0 4 of 1 0 2 A is a bar material under a second pressing force larger than the required pressing force described above for centering and supporting the bar material W on the material support part 1 0 4. Hold W in a fixed manner.
- the chuck of the spindle 12 In addition to 1 4, the guide bush 1 0 2 of the material guide device 1 0 0 firmly holds the bar W so that high-precision machining can be performed.
- the material guide device 100 is of the rotary type shown in the figure. In the present invention, even when the operating member is in the second closed position, the guide push can be configured to support the center without holding the bar.
- each bidirectional drive member 62 applies a driving force in the axial direction rearward to the transmission member 70 under the action of the above-described lever, thereby operating member 18 (first cylinder).
- the element 4 8) moves with the guide bush 10 0 2 B in the axial direction rearward in the support member 10 6 and reaches the second closing position.
- the pressure receiving surface 3 2 of the guide bush 1 0 2 B is strongly pressed against the working surface 6 0 of the support member 1 0 6 so that the guide bush 1 0 2 B material support section 10 4 secures the bar W under the second pressing force larger than the required pressing force described above for centering and supporting the bar W on the material support section 10 4.
- the material guide device 100 described above includes an urging member 9 2 provided in association with the stationary guide bush 10 2 A and an urging member 94 provided in connection with the drive mechanism 20. However, at least one of the biasing members 92, 94 can be omitted.
- the material guide device 100 without the urging members 9 2 and 94 has the same configuration as the material gripping device 10 described above, and has the same operational effects. While several preferred embodiments have been described, the present invention may be subject to various modifications within the scope of the appended claims.
- the transmission member 70 is connected to the first cylindrical element 48 of the actuating member 18 with the internal thread of the internal thread of the transmission member 70 and the external thread of the first cylindrical element 48. It can be attached using a landing structure.
- the screwing position of the transmission member 70 on the first cylindrical element 48 is appropriately selected, and under the driving force of the bidirectional driving member 62.
- the inner diameter of chucks 14 A, 14 B or guide push 10 02 A, 102 B can be finely adjusted by a desired amount.
- the forward direction driving force for closing the gripping portion of the chuck and the reverse direction driving force for opening the gripping portion of the chuck are driven. Obtained alternatively by mechanism. Therefore, for example, two types of chucks are installed in the material gripping device so that they can be exchanged with each other so that the drive force of the drive mechanism that is the forward drive force in one chuck and the reverse drive force in the other chuck can do. Therefore, taking into account the machine configuration of the machine tool, the material of the workpiece to be machined, the required machining accuracy, etc., the configuration of the chuck operating mechanism can be easily and appropriately changed. Multi-use of material gripping devices can be realized while preventing cost increases and burdens on workers.
- the drive mechanism can reliably exert forward direction drive forces that are opposite to each other with respect to each chuck, regardless of whether the chuck is a stationary chuck or a movable chuck. As a result, when these chucks are exchanged with each other, the necessary gripping force can be stably obtained in any chuck.
- the stationary chuck and the second cylindrical element are replaced with the movable chuck.
- the configuration of the working member push-out type using the stationary chuck and the configuration of the working member retracting type using the moving chuck can be realized alternatively.
- the forward drive force of the drive mechanism for closing the gripping part of each of the stationary type and the moving type chuck is applied in the direction opposite to each other.
- a guide support function similar to that of the guide bush is added to the chuck.
- the same effect can be obtained.
- two guide bushes can be exchanged with each other so that the drive force of the drive mechanism, which is the forward drive force in one guide bush, is the reverse drive force in the other guide bush.
- the opening / closing operation method of the material gripping device or material guiding device in the automatic lathe can be easily changed.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800410170A CN101068643B (zh) | 2004-11-30 | 2005-11-28 | 坯料把持装置,坯料导向装置及自动车床 |
EP05811525.4A EP1829637B1 (en) | 2004-11-30 | 2005-11-28 | Material holding device and material guide device |
KR1020077012251A KR101221073B1 (ko) | 2004-11-30 | 2005-11-28 | 소재 파지 장치, 소재 가이드 장치 및 자동 선반 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-345309 | 2004-11-30 | ||
JP2004345309A JP4637554B2 (ja) | 2004-11-30 | 2004-11-30 | 素材把持装置、素材ガイド装置及び自動旋盤 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006059739A1 true WO2006059739A1 (ja) | 2006-06-08 |
Family
ID=36565171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/022230 WO2006059739A1 (ja) | 2004-11-30 | 2005-11-28 | 素材把持装置、素材ガイド装置及び自動旋盤 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1829637B1 (ja) |
JP (1) | JP4637554B2 (ja) |
KR (1) | KR101221073B1 (ja) |
CN (1) | CN101068643B (ja) |
WO (1) | WO2006059739A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210276107A1 (en) * | 2020-03-05 | 2021-09-09 | Schaublin Sa | Clamping device for clamping a tool or work piece |
TWI818127B (zh) * | 2018-12-17 | 2023-10-11 | 日商星精密股份有限公司 | 車床 |
TWI832934B (zh) * | 2018-12-17 | 2024-02-21 | 日商星精密股份有限公司 | 車床 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200452923Y1 (ko) * | 2008-10-29 | 2011-03-28 | 한화테크엠주식회사 | 자동선반의 척킹장치 |
TW201417942A (zh) * | 2012-11-07 | 2014-05-16 | xuan-long Wu | 具有同動雙向油壓夾頭裝置之同一動力源雙加工系統 |
CN103785871B (zh) * | 2014-02-17 | 2016-06-15 | 广州中国科学院先进技术研究所 | 一种棒料自动夹紧装置 |
KR101582626B1 (ko) * | 2014-10-14 | 2016-01-06 | 주식회사 나이스맥 | 공작기계용 무유압 척킹장치 |
KR20190045003A (ko) | 2017-10-23 | 2019-05-02 | 김주원 | 초소형 부품 클램핑용 척 |
CN108890271A (zh) * | 2018-08-20 | 2018-11-27 | 厦门攸信信息技术有限公司 | 一种锁紧装置及扭转装置 |
US11833630B2 (en) | 2021-05-28 | 2023-12-05 | Yamazaki Mazak Corporation | Machine tool with removable workpiece support |
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US2517908A (en) | 1948-11-26 | 1950-08-08 | Cone Automatic Mach Co Inc | Work spindle with eccentric work support |
US4397562A (en) * | 1980-02-26 | 1983-08-09 | Citizen Watch Company Limited | Digital-analog converter circuit for speech-synthesizing electronic timepiece |
JPS6094209A (ja) * | 1983-10-31 | 1985-05-27 | Toyoda Mach Works Ltd | コレツトチヤツクによる工作物保持装置 |
US4699389A (en) * | 1985-08-30 | 1987-10-13 | Buck James R | Workholder |
JP2566570B2 (ja) * | 1987-04-07 | 1996-12-25 | シチズン時計株式会社 | 自動盤のガイドブッシュ装置及び自動盤における素材把持方法 |
JP2002355707A (ja) | 2001-05-30 | 2002-12-10 | Toshiba Mach Co Ltd | コレットクランプ装置 |
Family Cites Families (1)
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US4379562A (en) * | 1981-01-05 | 1983-04-12 | Joyal Products, Inc. | Indexing apparatus |
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2004
- 2004-11-30 JP JP2004345309A patent/JP4637554B2/ja not_active Expired - Fee Related
-
2005
- 2005-11-28 WO PCT/JP2005/022230 patent/WO2006059739A1/ja active Application Filing
- 2005-11-28 CN CN2005800410170A patent/CN101068643B/zh not_active Expired - Fee Related
- 2005-11-28 KR KR1020077012251A patent/KR101221073B1/ko active IP Right Grant
- 2005-11-28 EP EP05811525.4A patent/EP1829637B1/en not_active Not-in-force
Patent Citations (6)
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US2517908A (en) | 1948-11-26 | 1950-08-08 | Cone Automatic Mach Co Inc | Work spindle with eccentric work support |
US4397562A (en) * | 1980-02-26 | 1983-08-09 | Citizen Watch Company Limited | Digital-analog converter circuit for speech-synthesizing electronic timepiece |
JPS6094209A (ja) * | 1983-10-31 | 1985-05-27 | Toyoda Mach Works Ltd | コレツトチヤツクによる工作物保持装置 |
US4699389A (en) * | 1985-08-30 | 1987-10-13 | Buck James R | Workholder |
JP2566570B2 (ja) * | 1987-04-07 | 1996-12-25 | シチズン時計株式会社 | 自動盤のガイドブッシュ装置及び自動盤における素材把持方法 |
JP2002355707A (ja) | 2001-05-30 | 2002-12-10 | Toshiba Mach Co Ltd | コレットクランプ装置 |
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See also references of EP1829637A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI818127B (zh) * | 2018-12-17 | 2023-10-11 | 日商星精密股份有限公司 | 車床 |
TWI832934B (zh) * | 2018-12-17 | 2024-02-21 | 日商星精密股份有限公司 | 車床 |
US20210276107A1 (en) * | 2020-03-05 | 2021-09-09 | Schaublin Sa | Clamping device for clamping a tool or work piece |
US11583940B2 (en) * | 2020-03-05 | 2023-02-21 | Schaublin Sa | Clamping device for clamping a tool or work piece |
Also Published As
Publication number | Publication date |
---|---|
EP1829637A4 (en) | 2010-09-08 |
CN101068643B (zh) | 2010-12-15 |
JP4637554B2 (ja) | 2011-02-23 |
EP1829637A1 (en) | 2007-09-05 |
KR101221073B1 (ko) | 2013-01-11 |
JP2006150512A (ja) | 2006-06-15 |
EP1829637B1 (en) | 2015-07-22 |
CN101068643A (zh) | 2007-11-07 |
KR20070084603A (ko) | 2007-08-24 |
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