WO2018092797A1 - 切粉・粉塵防止カバー、切粉・粉塵防止カバーセット、チャック機構及び工作機械 - Google Patents
切粉・粉塵防止カバー、切粉・粉塵防止カバーセット、チャック機構及び工作機械 Download PDFInfo
- Publication number
- WO2018092797A1 WO2018092797A1 PCT/JP2017/041069 JP2017041069W WO2018092797A1 WO 2018092797 A1 WO2018092797 A1 WO 2018092797A1 JP 2017041069 W JP2017041069 W JP 2017041069W WO 2018092797 A1 WO2018092797 A1 WO 2018092797A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chip
- prevention cover
- dust prevention
- master jaw
- chuck
- 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
- B23B31/001—Protection against entering of chips or dust
-
- 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
- B23B31/021—Faceplates
-
- 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
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/1627—Details of the jaws
- B23B31/16275—Form of the jaws
-
- 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
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/1627—Details of the jaws
- B23B31/16279—Fixation on the master jaw
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/28—Dust covers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/36—Sealed joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/132—Serrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
- B23B2270/30—Chip guiding or removal
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
- B23Q11/005—Devices for removing chips by blowing
Definitions
- the present invention is a chip / dust prevention cover installed on a chuck end face of a machine tool such as a lathe and closing a gap generated on the chuck end face, and a chip / dust containing a plate suitable for use with the chip / dust prevention cover.
- the present invention relates to a prevention cover set, a chuck mechanism using the chip / dust prevention cover set, and a machine tool having the chuck mechanism.
- FIGS. 12 and 13 are views of the end surface 112 of the chuck body 110 as viewed from the outside in the axial direction to the inside of the chuck body 110
- FIG. 12 is a view showing a state in which the chuck is opened.
- FIG. 4 is a view showing a state in which the chuck is closed.
- the master jaw 120 is installed in each of the three master jaw insertion grooves 115 on the end surface 112 of the chuck body 110, and a claw 210 for grasping a workpiece is provided on each master jaw 120. It is installed.
- Three master jaws 120 are configured to be movable in the radial direction simultaneously by the axial movement of a shifter (not shown) installed inside the chuck body 110.
- a cylindrical chuck cover 117 is inserted and installed in the center hole of the chuck main body 110 from the end face 112 side, and the end face on the end face 112 side of the chuck cover 117 is covered with a lid 118.
- the claw 210 When cutting a workpiece with a lathe, the claw 210 is moved radially outward of the end face of the chuck body 110 to bring the chuck into an open state as shown in FIG. Insert the workpiece.
- the claw 210 When the work is arranged, the claw 210 is moved radially inward to close the chuck as shown in FIG. 13 (the work is not shown), and the work is grasped by the three claws 210. Thereafter, the spindle of the lathe is rotated, and the tool is pressed into the work surface of the work while rotating the work, and the work is cut into a desired shape.
- chips are generated when the workpiece is machined. If the chips adhere to or accumulate on the claw 210, the master jaw 120, the master jaw insertion groove 115, or the chuck body 110, a chucking failure or a workpiece There is an increased risk that the gripping accuracy (clamping accuracy) will deteriorate. Further, when replacing the claw (replacement), there is a risk that the mounting accuracy between the master jaw and the claw will deteriorate. Therefore, it is necessary to prevent chips from adhering to and accumulating around the nail 210 and the master jaw 120.
- the master jaw 120 moves in the radial direction on the end surface 112 of the chuck body 110 to open and close the chuck, the end surface of the master jaw 120 on the central side in the radial direction and the chuck cover 117 (chuck cover lid 118).
- a space for enabling the movement of the master jaw 120 is indispensable between the outer diameter portion and the outer diameter portion. That is, a gap 119 as shown by the oblique lines in FIGS. 12 and 13 is required.
- the chips enter and accumulate in the gap 119 to increase the risk of causing chucking defects and the like, and further increasing the risk of processing defects.
- the gap 119 on the radial center side of the master jaw 120 is relatively deep, and it is difficult to completely prevent chips from entering even by air blow.
- An object of the present invention is to prevent chips from entering or accumulating in the chuck mechanism, and in particular, chips are formed in the gap between the radially inner end face of the master jaw and the chuck cover at the chuck center. Intrusion or accumulation can be prevented, and as a result, the desired cutting can be performed with high accuracy and efficiency. As a result, automatic operation, unmanned operation, and maintenance-free operation of machine tools such as lathes are possible.
- An object of the present invention is to provide a chip / dust prevention cover, a chip / dust prevention cover set, a chuck mechanism, and a machine tool capable of achieving improvement in productivity and machine operation rate.
- the chip / dust prevention cover of the present invention is a chip / dust prevention cover installed on the chuck end face, A plate surface portion covering a predetermined region on the center side of the chuck end surface of the radially arranged master jaw;
- a moving member such as a master jaw that includes the master jaw and a member that is installed on the master jaw and integrated with the master jaw, a close portion that is in close contact with the end portion on the center side of the moving member such as the master jaw , A force receiving portion that receives an urging force that keeps the contacted state and follows the chip / dust prevention cover against a predetermined radial movement of the chuck end face of the moving member such as the master jaw.
- the “predetermined region on the center side of the chuck end surface” covered by the plate surface portion is generated on the chuck end surface, such as a gap between the end surface on the radially inner side of the master jaw and the chuck cover at the chuck center portion.
- the “moving member such as a master jaw” is, for example, a master jaw, a claw installed on the master jaw, and a member for installing a claw on the master jaw. It is a concept including a member called a so-called T-nut. When grasping a workpiece on the chuck, these are fixed to the master jaw and are movable in the radial direction of the chuck together with the master jaw.
- the “moving member such as a master jaw” includes an arbitrary member integrated with the master jaw when the workpiece is grasped by the chuck.
- the “predetermined movement” in the radial direction of the chuck end surface of the moving member such as the master jaw means that the moving member such as the master jaw is arranged in the radial direction of the end surface of the chuck body in order to fit the workpiece into the center of the end surface of the chuck body.
- the close contact portion has a first close contact portion that is in close contact with the center side of the serration surface portion of the master jaw.
- the close contact portion has a second close contact portion that is in close contact with a portion other than the serration surface portion of the master jaw of the moving member such as a master jaw.
- the chip / dust prevention cover of the present invention is A master jaw side extending portion extending along both radial sides of the master jaw; An air outlet that is formed in the master jaw side portion extending portion, and jets an airflow to the serration surface of the master jaw; It further has a chip / dust prevention cover air groove for supplying an air flow supplied from a predetermined location to the air outlet.
- the chuck end face plate of the present invention is a chuck end face plate installed on the chuck end face, A chip / dust prevention cover installation guide that can be mounted on the chip / dust prevention cover so as to be movable in the radial direction of the chuck end surface; And a biasing means for applying the biasing force to the chip / dust prevention cover mounted on the chip / dust prevention cover installation guide.
- the chuck end face plate of the present invention is a chuck end face plate installed on the chuck end face, A chip / dust prevention cover installation guide that can be mounted on the chip / dust prevention cover so as to be movable in the radial direction of the chuck end surface; An urging means for applying the urging force to the chip / dust prevention cover mounted on the chip / dust prevention cover installation guide; A top plate air groove that supplies an air flow supplied through a pipe installed in the chuck body to the air groove of the chip / dust prevention cover of the chip / dust prevention cover.
- the chip / dust prevention cover set of the present invention includes the chip / dust prevention cover and the chuck end face plate.
- the chip / dust prevention cover set of the present invention includes the chip / dust prevention cover having the dust / dust prevention cover air groove and the chuck end face plate having the top plate air groove.
- the chip / dust prevention cover set of the present invention includes a plurality of the chips / dust prevention covers for a plurality of radially arranged master jaws and a plurality of the chips / dust prevention covers for the plurality of chips / dust prevention covers. And a chuck end face plate having a plurality of urging means for the plurality of chips / dust prevention covers.
- the chip / dust prevention cover set of the present invention is configured in the chip / dust prevention cover installation guide portion of the chip / dust prevention cover and the chuck end plate, and the chip / dust prevention It has a chip / dust prevention cover fixing means for defining the moving range of the cover.
- the chuck mechanism of the present invention has the above chip / dust prevention cover set.
- the machine tool of the present invention has the above-described chuck mechanism.
- the present invention it is possible to prevent chips from entering or accumulating in the chuck mechanism, and in particular, chips are formed in the gap between the radially inner end surface of the master jaw and the chuck cover at the chuck center. Intrusion or accumulation can be prevented, and as a result, the desired cutting can be performed with high accuracy and efficiency. As a result, automatic operation, unmanned operation, and maintenance-free operation of machine tools such as lathes are possible. It is possible to provide a chip / dust prevention cover, a chip / dust prevention cover set, a chuck mechanism, and a machine tool capable of achieving improvement in productivity and machine operation rate.
- FIG. 1 is a diagram showing a configuration of a lathe according to an embodiment of the present invention according to the first embodiment of the present invention.
- FIG. 2 is a view showing the configuration of the chuck body and the master jaw of the chuck mechanism according to the present invention.
- FIG. 3 is a diagram showing a configuration of a steered claw of the chuck mechanism according to the present invention.
- FIG. 4 is a diagram illustrating a configuration of a steered nail body of the steered nail illustrated in FIG. 3.
- FIG. 5 is a diagram illustrating a configuration of the serration piece of the steered claw illustrated in FIG. 3.
- FIG. 6 is a view showing the configuration of the rear grip and the front grip of the chuck mechanism according to the present invention.
- FIG. 1 is a diagram showing a configuration of a lathe according to an embodiment of the present invention according to the first embodiment of the present invention.
- FIG. 2 is a view showing the configuration of the chuck body and the master jaw of the chuck mechanism according
- FIG. 7 is a view for explaining a procedure for installing the steered claw shown in FIG. 3 on the master jaw shown in FIG.
- FIG. 8 is a diagram illustrating a state of the end surface of the chuck body when the chuck is opened.
- FIG. 9 is a diagram illustrating a state of the end surface of the chuck body when the chuck is closed.
- FIG. 10 is a diagram showing the configuration of the top plate.
- FIG. 11 is a diagram illustrating a configuration of a top cover (a chip / dust prevention cover).
- FIG. 12 is a view showing a state of the end face of the chuck body when the chuck is opened in the conventional chuck mechanism.
- FIG. 13 is a view showing a state of the end face of the chuck body when the chuck is closed in the conventional chuck mechanism.
- FIG. 14 is a diagram showing a configuration of a top plate according to the second embodiment of the present invention.
- FIG. 15 is a diagram showing a configuration of a top cover (chip / dust prevention cover) according to the second embodiment of the present invention.
- 16 is a diagram schematically showing a state in which the top plate shown in FIG. 14, the top cover shown in FIG. 15, and the master jaw are installed on the chuck body.
- FIG. 17 is a view showing another configuration of the chuck body and the master jaw of the chuck mechanism according to the present invention.
- FIG. 18 is a view showing another configuration of the steered claw of the chuck mechanism according to the present invention.
- 19 is a diagram for explaining another procedure for installing the steered claw shown in FIG. 3 on the master jaw shown in FIG.
- FIG. 1 is a diagram showing a schematic configuration of a lathe according to an embodiment of the present invention.
- a lathe 1 according to this embodiment includes a chuck mechanism 10 that grasps a workpiece to be machined, a motor 30 that rotationally drives the chuck mechanism 10, and a spindle that transmits the rotational power of the motor 30 to the chuck mechanism 10 (
- the control unit 50 controls the operations of the spindle 40 and the motor 30.
- the chuck mechanism 10 includes a chuck main body 110 and a master jaw 120 shown in FIG. 2, a steered claw 200 shown in FIG. 3, a pair of grips 510 and 540 shown in FIG. 6, a top plate 310 shown in FIG. A top cover (chip for preventing chips and dust) 360 is shown.
- FIG. 2 is a diagram showing the configuration of the chuck body 110 and the master jaw 120 of the chuck mechanism 10.
- the chuck main body 110 has a cylindrical shape, and three radial master jaw insertion grooves 115 for installing the master jaw 120 are formed on the end face 112 at equal intervals.
- the master jaw insertion groove 115 has a cross-sectional shape in which a wide bottom portion and a narrow upper portion are continuous in two steps, and is formed to have a predetermined length in the radial direction from the outer peripheral surface of the chuck body.
- a cylindrical chuck cover 117 is inserted and installed in the center hole 113 of the chuck body 110 from the end face 112 side, and the end face on the end face 112 side of the chuck cover 117 is covered with a lid 118.
- a shifter (not shown) that engages with the master jaw 120 installed in the master jaw insertion groove 115 and moves the master jaw 120 in the radial direction is installed in the chuck body 110.
- the master jaw 120 is a cradle for attaching the steered claw 200 to the chuck body 110.
- the master jaw 120 is a metal member having a cross-sectional shape and size that is inscribed and accommodated in the master jaw insertion groove 115 of the chuck body 110.
- a claw installation groove 123 for attaching the steered claw 200 is formed on the upper surface of the master jaw 120 along the longitudinal direction.
- the claw installation groove 123 has a T-shaped cross section having a wide bottom portion and a narrow top portion, and a downward step surface serving as a boundary between the top portion and the bottom portion is a shoulder when the steered claw 200 is drawn downward.
- Part (retraction support surface) 124 Part (retraction support surface) 124.
- serration surfaces 125 and 126 are formed on both sides of the upper opening (groove opening) 127 of the claw installation groove 123.
- the serration surfaces 125 and 126 have a structure in which a large number of quadrangular pyramid shaped spikes are arranged at predetermined pitches in a direction perpendicular to and a direction parallel to the extending direction of the claw installation groove 123.
- the spike having such a structure is, for example, a vertical sawtooth having a triangular section extending in a direction perpendicular to the extending direction of the claw installation groove 123 and arranged in a parallel direction at a predetermined pitch, and the claw installation groove 123.
- a cross section extending in a direction parallel to the extending direction and arranged at a predetermined pitch in the vertical direction is formed by forming triangular sawtooth in the horizontal direction on the same plane.
- the height of the master jaw 120 is slightly higher than the depth of the master jaw insertion groove 115 of the chuck body 110. In other words, the upper surfaces of the serration surfaces 125 and 126 of the master jaw 120 slightly protrude from the end surface 112 of the chuck body 110 (see FIG. 2).
- the master jaw 120 is engaged with a shifter (not shown) having an engaging portion that protrudes from the bottom, which is installed inside the chuck body 110, and three master jaws are moved by the axial movement of the shifter. 120 is configured to move in the radial direction of the chuck body 110 at the same time.
- FIG. 3 is a view showing the structure of the steered claw 200
- FIG. 3 (A) is a partially cut perspective view
- FIG. 3 (B) is a side view
- FIG. 3 (C) is a front view
- . 4 is a view showing the structure of the steered claw body 201 of the steered claw 200 shown in FIG. 3
- FIG. 4 (A) is a partially cut perspective view
- FIG. 4 (B) is a side view
- FIG. 4C is a front view.
- 5 is a view showing the structure of the serration pieces 271 and 272 of the steered claw 200 shown in FIG. 3
- FIG. 5 (A) is a perspective view of the horizontal serration piece 271 and FIG. 5 (B).
- FIG. 5C is a perspective view of the vertical serration piece 272
- FIG. 5D is a perspective view of the serration surface 274 of the vertical serration piece 272.
- the steered claw 200 is a member in which a claw 210 for grasping a workpiece and a steer 240 for installing the claw 210 on the master jaw 120 are integrally formed.
- the tip of the claw 210 is formed in a workpiece grasping portion 211 for forming a workpiece grasping surface that contacts the workpiece and grasps the workpiece.
- claw 210 of this embodiment is a raw nail
- the workpiece grasping portion 211 of each of the claws 210 grasps the workpiece with an appropriate contact surface and is completely centered with respect to the chuck body 110.
- the workpiece grasping unit 211 is first processed to form a workpiece grasping surface on the workpiece grasping unit 211. That is, so-called nail formation is performed. Then, the workpiece is actually grasped by the three claws 210, and the workpiece is cut.
- a lateral serration surface 273 and a vertical serration surface 274 are formed on both sides of the lower surface of the claw 210.
- Each of the horizontal serration surface 273 and the vertical serration surface 274 has a structure in which a large number of saw teeth having a substantially equilateral triangle cross section are arranged at a predetermined pitch.
- the lateral serration surface 273 has a structure in which saw teeth extending in the width direction (short direction) of the claw 210 are arranged at a predetermined pitch in the longitudinal direction of the claw 210, and one serration surface 125 (see FIG. 2) of the master jaw 120. A serration surface engaged with the reference).
- the vertical serration surface 274 has a structure in which saw teeth extending in the longitudinal direction of the claw 210 are arranged at a predetermined pitch in the width direction (short direction) of the claw 210, and the other serration surface 126 ( It is a serration surface engaged with FIG.
- the steered claw 200 includes a steered claw main body 201 shown in FIG. 4, a horizontal serration piece 271 shown in FIG. 5A, and a vertical serration piece 272 shown in FIG. 5B by serration piece mounting bolts 280.
- the structure is assembled and integrated.
- the steered claw body 201 is a member in which the claw body 202 and the steer 240 are integrally formed as shown in FIGS. 4 (A) to 4 (C).
- the claw body 202 is a member in which serration piece cutouts 203 and 204 are formed at a predetermined length from the end opposite to the workpiece grasping portion 211 at the lower part of both side surfaces of the claw 210 (see FIG. 3). It is. In other words, the member is obtained by excluding the portions corresponding to the serration pieces 271 and 272 from the claw 210.
- the steer 240 is a metal member for installing the claw 210 on the master jaw 120.
- the rear-side end surface 245 and the front-side end surface 246 of the steer 240 are each formed as a corrugated engagement surface.
- the corrugated engagement surface is formed in a shape that is pulled downward with respect to the grips 510 and 540 by sandwiching and tightening the steer 240 by grips 510 and 540 described later having opposing corrugated engagement surfaces of opposite shapes. Has been.
- the horizontal serration piece 271 is a rectangular parallelepiped metal member as shown in FIG.
- Bolt passage holes 275 are formed in the lateral serration piece 271 so as to penetrate between both side surfaces in the width direction.
- a counterbore 277 for accommodating the head of the serration piece mounting bolt 280 (see FIG. 3) is formed around the bolt passage hole 275 on the side surface that becomes the outer surface when the claw body 201 with the steering is installed. Yes.
- the lower surface of the horizontal serration piece 271 is formed on a horizontal serration surface 273 on which saw teeth extending in the short direction (width direction) of the horizontal serration piece 271 are formed.
- the vertical serration piece 272 is a rectangular parallelepiped metal member having substantially the same size as the horizontal serration piece 271 as shown in FIG.
- Bolt passage holes 276 are also formed in the vertical serration piece 272 so as to penetrate between both side surfaces in the width direction.
- a counterbore 278 for receiving a nut into which a serration piece mounting bolt 280 (see FIG. 3) is screwed is formed around the bolt passage hole 276 on the side surface that is to be engaged with the outer surface of the claw body 201 with the steering.
- the lower surface of the vertical serration piece 272 is formed on a serration surface 274 on which saw teeth extending in the longitudinal direction of the vertical serration piece 272 are formed.
- the horizontal serration piece 271 and the vertical serration piece 272 having such a configuration are respectively arranged in the serration piece cutouts 203 and 204 of the steered claw body 201 shown in FIG. 4, and the bolts of the serration pieces 271 and 272 at three locations respectively.
- Three serration piece mounting bolts 280 are installed so as to pass through the through holes 275 and 276 and the bolt passage hole 206 (see FIG. 4) of the steered claw body 201, and these are provided by nuts (not shown). Tighten. As a result, a steered claw 200 as shown in FIGS. 3A to 3C is formed.
- FIG. 6 is a diagram illustrating the configuration of the rear grip 510 and the front grip 540 of the chuck mechanism 10.
- the rear grip 510 and the front grip 540 are inserted into the claw installation groove 123 (see FIG. 2) of the master jaw 120, and the steer 240 (see FIG. 3) of the steered claw 200 is sandwiched from both sides, whereby the steered claw 200 is inserted. It fixes to the master jaw 120 (refer FIG. 7). Therefore, each of the grips 510 and 540 is a metal member having a cross-section having a shape that is inscribed and accommodated in the claw installation groove 123 of the master jaw 120, that is, the same T-shaped cross section as the claw installation groove 123.
- the rear grip 510 has an opposing corrugated engagement in which an end surface 513 on the outer diameter side in a state of being inserted into the claw installation groove 123 of the master jaw 120 faces and contacts the rear end surface 245 of the steer 240 of the steered claw 200. It is formed on the surface 513.
- the front grip 540 has an end surface on the inner diameter side when inserted in the claw installation groove 123 of the master jaw 120 and is opposed to the front side end surface 246 of the steer 240 of the steered claw 200. 543 is formed.
- the rear grip 510 and the front grip 540 have stepped surfaces 512, which face and contact the shoulders 124 of the claw installation groove 123 of the master jaw 120 on both sides in the width direction when inserted into the claw installation groove 123. 542 is formed. As will be described later, the stepped surfaces 512 and 542 serve as pull-in support surfaces when the steer 240 of the steered claw 200 is tightened and the steered claw 200 is pulled. Further, the inner diameter side end of the step surface 512 of the rear grip 510 is chamfered so as not to interfere with the inner diameter side corner of the claw installation groove 123 when inserted into the claw installation groove 123 of the master jaw 120. It is formed in the inclined surface notched in.
- clamp bolt holes 530 and 560 are formed in the grips 510 and 540 in the direction that becomes the extending direction of the claw installation groove 123 when these are inserted into the claw installation groove 123 of the master jaw 120.
- a screw groove into which a screw portion at the tip of the clamp bolt is screwed is formed in the clamp bolt hole 530 of the rear grip 510.
- a counterbore 561 that accommodates the head of the clamp bolt is formed coaxially with the clamp bolt hole 560 on the outer diameter side end surface 544 side of the clamp bolt hole 560 formed in the front grip 540.
- FIGS. 7A to 7C are diagrams for explaining the procedure for installing the steered claw 200 on the master jaw 120, respectively. It is assumed that the master jaw 120 is installed in the master jaw insertion groove 115 of the chuck body 110.
- the grips 510 and 540 are inserted into the claw installation groove 123 of the master jaw 120.
- the rear grip 510 is inserted into the claw installation groove 123 in such a direction that the outer diameter side end surface (opposite waveform engaging surface) 513 is on the outer diameter side
- the front grip 540 is inserted into the outer diameter side end surface 544 with the outer diameter. Insert into the nail installation groove 123 in the direction of the side.
- the grips 510 and 540 are installed in the claw installation groove 123 of the master jaw 120 in the form as shown in FIG.
- the steered claw 200 is installed on the master jaw 120.
- the steered claw 200 is moved from the upper side of the claw installation groove 123 of the master jaw 120 toward the claw installation groove 123 of the master jaw 120, and the steer 240 is inserted into the claw installation groove 123.
- the claw 210 is arranged in contact with the master jaw 120.
- the serrations of the serration surfaces 273 and 274 on the lower surface of the claw 210 of the steered claw 200 and the serrations of the serration surfaces 125 and 126 of the master jaw 120 are engaged at predetermined positions (see FIGS. 2 and 5).
- the steered claw 200 is disposed at a predetermined position on the master jaw 120 in the radial direction and the circumferential direction.
- the clamp bolt 570 When the steer 240 of the steered claw 200 is inserted into the claw installation groove 123, the clamp bolt 570 is inserted from the end of the master jaw 120 on the outer peripheral surface of the chuck body 110 as shown in FIG.
- the clamp bolt 570 is inserted into the clamp bolt hole 560 from the portion of the clamp bolt counterbore 561 on the outer diameter side end surface 544 (see FIG. 6) of the front grip 540, and the front side end surface 246 of the steer 240 (see FIG. 3). Passes through the clamp bolt passage hole 263 from the rear end surface 245 to be screwed into the clamp bolt hole 530 of the rear grip 510 formed in the screw hole.
- the steered claw 200 is drawn in the depth direction of the claw installation groove 123 with respect to the master jaw 120, and serrations (saw-toothed sawtooth) of the serration surfaces 273, 274 on the lower surface of the steered claw 200. Then, the serrations (spikes) of the serration surfaces 125 and 126 of the master jaw 120 are deeply engaged. As a result, the centers of these serrations are precisely aligned, and the position of the claw 210 of the steered claw 200 is also positioned with high accuracy.
- FIG. 8 is a diagram illustrating a state of the end surface 112 of the chuck main body 110 in a state where the chuck is opened
- FIG. 9 is a diagram illustrating a state of the end surface 112 of the chuck main body 110 in a state where the chuck is closed.
- FIG. 10 is a diagram illustrating the configuration of the top plate 310
- FIG. 10A is a plan view (when the end surface 112 of the chuck main body 110 is mounted, a view of the end surface 112 viewed from the outside in the axial direction of the chuck main body 110).
- 10B is a side view seen from the direction A in FIG. 10A
- FIG. 10C is an enlarged partial cross-sectional view taken along line BB in FIG. 10A
- FIG. FIG. 10D is an enlarged partial cross-sectional view taken along a line CC in FIG.
- the structure on the right side of the line DD in FIG. 10A is not shown in FIG. 10B.
- FIG. 11A and 11B are views showing the structure of the top cover 360, FIG. 11A is a plan view, FIG. 11B is a front view seen from the direction E in FIG. 11A, and FIG. These are the side views seen from the direction of F of Drawing 11 (A).
- the top plate 310 and the top cover 360 are installed on the end surface 112 of the chuck main body 110, and the inner diameter side end portions of the master jaw 120 and the steered claw 200 (the end surface 112 of the chuck main body 110 are arranged). Intrusion of chips into the gap between the inner diameter side end) and the chuck cover 117 (chuck cover lid 118) installed on the chuck body 110 is prevented. As illustrated, one top plate 310 and three top covers 360 are installed on the end surface 112 of the chuck body 110.
- the top plate 310 is a plate-like member having a substantially triangular planar shape as shown in FIGS. 10 (A) and 10 (B).
- a notch 320 for entering the master jaw is formed at the center of the three long sides of the top plate 310.
- the master jaw entry notch 320 is formed in the central portion of the master jaw insertion groove 115 of the chuck body 110 as shown in FIGS. 8 and 9. It is an overlapping cutout.
- the width a of the master jaw entry notch 320 is the same as the width of the master jaw insertion groove 115, and the master jaw entry notch 320 has a master jaw that moves in the radial direction in the master jaw insertion groove 115.
- the end portion on the center side of 120 is configured to be able to enter.
- a top cover guide recess 330 is formed around the notch 320 for entering the master jaw of the top plate 310. As shown in FIGS. 10C and 10D, the top cover guide recess 330 is formed on the lower surface side of the top plate 310 (the side in contact with the end surface 112 of the chuck body 110), and the inside thereof will be described later.
- the top cover 360 is configured to be movable in a direction parallel to the moving direction of the master jaw 120 (the radial direction of the end surface 112 of the chuck body 110).
- the width c of the top cover guide recess 330 is the width of the gap that the top cover set 300 covers and closes, that is, the width of the gap formed between the inner end of the master jaw 120 and the chuck cover 117 (of the top plate 310).
- the length is substantially the same as the length in the direction parallel to the long side.
- the width c of the top cover guide recess 330 is substantially the same as the width of the top cover 360 described later, and is a length that allows the top cover 360 to easily move in the top cover guide recess 330.
- the depth d of the top cover guide recess 330 is set so that, as will be described later, the master is closed when the chuck is closed, that is, when the end of the center side of the master jaw 120 is moved to the most center side (state of FIG. 9). A length that does not interfere with the top plate 310 of the center side end of the top cover 360 that moves in the center side direction following the jaw 120 is secured.
- the top cover 360 is a plate-like member having a substantially rectangular planar shape as shown in FIGS. 11 (A) to 11 (C). As shown in FIGS. 8 and 9, the top cover 360 is inserted into the top cover guide recesses 330 at the three locations of the top plate 310, guided by the top cover guide recesses 330, and the end surface 112 of the chuck body 110 is made to have a diameter. Move in the direction.
- a master jaw serration surface fitting portion (first intimate portion) 370 cut out toward the inner side is formed on both sides of the edge, and the master jaw surface
- a grip contact portion (second close contact portion) 375 protruding outward is formed between the fitting portions 370.
- the master jaw serration surface fitting portions 370 on both sides are portions (close contact portions) fitted to the end portion on the center side of the master jaw 120.
- the grip contact portion 375 is a portion that contacts the inner diameter side end surface 514 of the rear grip 510 inserted into the claw installation groove 123 of the master jaw 120.
- the master jaw 120 has serration surfaces 125 and 126 formed on both sides in the short direction (see FIG. 2).
- An upper opening 127 of the claw installation groove 123 is formed between one serration surface 125 and the other serration surface 126.
- the serration surfaces 125 and 126 protrude from the end surface 112 of the chuck body 110 to the surface side.
- the top cover 360 is formed in a shape that can be fitted to the center side end of the master jaw 120 having such a configuration. That is, as shown in FIG. 8, the serration surfaces 125 and 126 of the master jaw 120 are fitted to the master jaw serration surface fitting portions 370 on both sides, and the grip contact portion 375 of the top cover 360 is A groove opening 127 between the serration surfaces 125 and 126 is fitted.
- the grips 510 and 540 that sandwich the steer 240 of the stair claw 200 are provided in the groove opening 127 between the serration surfaces 125 and 126 of the master jaw 120. Will be placed. Therefore, the end of the grip contact portion 375 is formed in a shape substantially equal to the shape of the inner diameter side end surface 514 of the rear grip 510 (in this embodiment, it is a flat surface), and the steered claw 200 is attached.
- the grip contact portion 375 contacts the inner diameter side end surface 514 of the rear grip 510.
- the top cover 360 contacts (closely) the master jaw 120 and the rear grip 510 at all locations on the outer edges of the master jaw serration surface fitting portions 370 on both sides and the grip contact portion 375 at the center. To do.
- a tap 332 is formed as shown in FIGS. 10 (A) and 10 (D).
- the tap 332 is a screw hole that penetrates the top cover guide recess 330 on the front and back sides.
- the taps 332 are respectively formed in the top cover guide recesses 330 at three locations on the top plate 310.
- a top cover fixing bolt 340 is installed on the tap 332.
- the top cover fixing bolt 340 is, for example, a hexagon socket set screw.
- a fixing bolt receiver 380 is formed on the surface of the top cover 360.
- the fixing bolt receiver 380 is an oblong recess (long counterbore) having a predetermined depth.
- the fixing bolt receiver 380 is formed at a position where the tap 332 of the top plate 310 is attached when the top cover 360 is fitted into the top cover guide recess 330 of the top plate 310. That is, when the top cover 360 is attached to the top plate 310, the tip of the top cover fixing bolt 340 installed on the tap 332 of the top plate 310 is inserted into the fixing bolt receiver 380.
- the top cover fixing bolt 340 does not press the bottom surface of the fixing bolt receiver 380, and the top cover 360 remains movable along the top cover guide recess 330 of the top plate 310. It is engaged with the fixing bolt receiver 380 to such an extent that it does.
- the top cover 360 is installed so as to be movable in the radial direction of the end surface 112 of the chuck body 110 along the top cover guide recess 330 of the top plate 310, but the top cover 360 is fixed.
- the top cover fixing bolt 340 is tightened. That is, the top cover fixing bolt 340 is tightened so that the top cover fixing bolt 340 presses the bottom surface of the fixing bolt receiver 380 of the top cover 360.
- the top cover 360 is sandwiched between the end surface 112 of the chuck body 110 and the top cover fixing bolt 340, and the top cover 360 cannot move along the top cover guide recess 330 of the top plate 310 of the top cover 360 and is fixed. Is done.
- the configuration for fixing the top cover 360 by the tap 332, the top cover fixing bolt 340, and the fixing bolt receiver 380 corresponds to “a chip / dust prevention cover fixing means” described in the claims.
- a spring seat 335 in which an end portion of a spring is installed on the inner surface of the top plate 310 forming the top cover guide recess 330. Is formed. Further, as shown in FIGS. 11A to 11C, when the center portion of the end surface on the center side of the top cover 360, that is, when the top cover 360 is installed in the top cover guiding recess 330 of the top plate 310, is shown. A spring seat (power receiving portion) 385 is formed on the surface of the top plate 310 facing the spring seat 335.
- a spring seat 335 provided on the top plate 310 and a spring seat provided on the top cover 360 are provided.
- a spring 390 biasing means that biases a force in a direction separating the top plate 310 and the top cover 360 from each other is disposed between the spring 390 and the top plate 310.
- the top plate 310 is installed on the end surface 112 of the chuck main body 110 as shown in FIGS. 8 and 9 by inserting mounting bolts (not shown) into the bolt holes 339.
- top plate 310 and the top cover 360 are installed on the end surface 112 of the chuck body 110 before the steered claw 200 is installed on the master jaw 120 in a state where the master jaw 120 is installed on the chuck body 110.
- the master jaw serration surface fitting portions 370 on both sides of the top cover 360 abut on the end portions of the serration surfaces 125 and 126 on the center side of the master jaw 120, and the grip contact portions 375 of the top cover 360 are
- the steer claw 200 attached to the master jaw 120 is in contact with the center side end surface of the steer 240.
- the periphery of the top cover 360 is covered with a top plate 310, and the gap between the end surface of the master jaw 120 on the central side in the radial direction and the outer diameter portion of the chuck cover 117 (chuck cover lid 118) is determined by the chuck. It is not exposed to the end surface 112 of the main body 110. That is, in the chuck mechanism 10 of the present embodiment, even when the master jaw 120 and the claw 200 with the steering are retracted toward the outer peripheral side of the end surface 112 of the chuck body 110 and the chuck is opened, No gap is formed for the chips to enter.
- the master jaw 120 and the claw 200 with the steer are moved inward in the radial direction so that the chuck is closed as shown in FIG. 9, and the work is grasped by the three claws 210.
- the top cover 360 moves to the center side in accordance with the movement of the master jaw 120, but at this time, no gap is formed so that chips enter the center center side of the master jaw 120. That is, the gap between the end surface of the master jaw 120 on the center side in the radial direction and the outer diameter portion of the chuck cover 117 (chuck cover lid 118) is not exposed to the end surface 112 of the chuck body 110.
- the chuck mechanism 10 of the present embodiment it is possible to appropriately prevent the chips from adhering or accumulating on the claw 210, the master jaw 120, the master jaw insertion groove 115, or the chuck body 110. It is possible to eliminate the risk of occurrence of chucking failure or a decrease in workpiece grasping accuracy (clamping accuracy). As a result, desired cutting can be performed efficiently with high accuracy. This also enables automatic operation, unmanned operation, maintenance-free operation, and the like of machine tools such as lathes, and can improve productivity and machine operation rate.
- top cover set 300 As a second embodiment of the present invention, another embodiment of the top cover set (chip / dust prevention cover set) 300 will be described with reference to FIGS.
- a machine tool such as a lathe
- cleaning is performed on the serration surface of the master jaw or the engagement serration surface between the master jaw and the claw (hereinafter simply referred to as the serration surface 125 of the master jaw). It is preferable to perform an air blow for this purpose.
- the top cover set shown as 2nd Embodiment is a top cover set which can perform an air blow to the serration surface of a master jaw.
- the top cover set of the second embodiment also includes one top plate 610 and three top covers (chips for preventing dust and dust) 660.
- the present invention is applied to a lathe 1 similar to the embodiment.
- the chuck main body 110 to which the top cover set of the second embodiment is applied is provided with a main spindle internal pipe 114 (see FIG. 14B) through which air is sent to the central portion in the axial direction. To do.
- the configuration other than the top plate 610, the top cover 660, and the above-described main spindle inner pipe 114, that is, the configuration of the chuck mechanism 10, the lathe 1, the master jaw 120, and the like is the same as that of the first embodiment. Therefore, the description of the configuration other than the top plate 610 and the top cover 660 will be omitted below, and the same reference numerals as those in the first embodiment will be used for reference.
- FIG. 14A and 14B are diagrams showing the configuration of the top plate 610, FIG. 14A is a plan view, and FIG. 14B is a cross-sectional view taken along line GG in FIG. 14A.
- the top plate 310 of the first embodiment is indicated by a two-dot chain line so that the difference between the top plate 610 of the second embodiment and the top plate 310 of the first embodiment becomes clear.
- the second top plate 610 of the second embodiment includes the notch 320 for entering the master jaw and the top cover guide recess 330 of the top plate 310 of the first embodiment. This is a configuration that is expanded to the outer periphery of the end surface 112.
- the top plate 610 of the second embodiment is a plate-like member having a substantially triangular planar shape that is slightly larger than the top plate 310 of the first embodiment and covers most of the end surface 112 of the chuck body 110. is there.
- the structure of the notch 620 for entering the master jaw and the top cover guide recess 630 is the same as that of the notch 320 for entering the master jaw and the top cover guide of the first embodiment except that the depths b and d (see FIG. 10) are increased. This is the same as the recess 330.
- the functions of the notch 620 for entering the master jaw and the top cover guide recess 630 differ only in the top plate to be inserted, and the basic functions are the notch 320 for entering the master jaw and the top cover guide of the first embodiment. This is the same as the recess 330.
- a spring seat (spring hole) 635 in which the end of the spring is installed. Is formed.
- a tap 632 having the same structure and function as the tap 332 of the first embodiment is formed in the region of the top cover guide recess 630 of the top plate 610.
- central circular holes 651 and three places are formed on the lower surface (the surface in contact with the end surface 112 of the chuck body 110) of the center portion of the top plate 610 of the second embodiment.
- the top plate air groove 650 is formed of the spring hole connecting groove 652.
- the central circular hole 651 is a recess that receives air sent through the main shaft inner pipe 114 of the chuck body 110, and the spring hole connection groove 652 includes the central circular hole 651 and three spring holes (spring seats) 635. Are grooves for connecting the two.
- the air sent through the main shaft inner pipe 114 of the chuck body 110 by the top plate air groove 650 having such a structure passes through the central circular hole 651, the spring hole connection groove 652, and the spring hole (spring seat) 635. , And sent to the top cover guide recess 630.
- FIG. 15A and 15B are diagrams showing the configuration of the top cover 660, in which FIG. 15A is an overall plan view, FIG. 15B is an enlarged view (partial plan view) of a portion H in FIG. 15C is a cross-sectional view of the same portion as FIG. 15B (a cross-sectional view taken along line LL in FIG. 15C), and FIG. 15D is a cross-sectional view of the portion H in FIG. 15A is a side view seen from the direction I, and FIG. 15E is a view taken along the line JJ in FIG. 15B and the line LL in FIG. 15D in the portion H in FIG. It is sectional drawing.
- the top cover 660 of the second embodiment is a plate-like member having a substantially rectangular planar shape, similar to the top cover 360 of the first embodiment.
- the top cover 660 is respectively fitted into three top cover guide recesses 630 (see FIG. 14A) of the top plate 610, and is guided by the top cover guide recess 630 so that the end surface 112 of the chuck body 110 is radially directed. Move to.
- the top cover 660 includes a master jaw surface fitting portion 670 and a grip contact portion 675.
- the master jaw surface engagement portion 670 and the grip contact portion 675 have the same structure and function as the master jaw surface engagement portion 370 and the grip contact portion 375 of the top cover 360 of the first embodiment. That is, the master jaw serration surface fitting portion 670 is fitted to the serration surfaces 125 and 126 (refer to FIGS. 8 and 9; the same applies hereinafter) of the master jaw 120, and the grip contact portion 675 is an inner diameter side end surface of the rear grip 510. 514 abuts. As a result, the top cover 660 contacts (closely contacts) the master jaw 120 and the rear grip 510 at all locations on the outer edge including the master jaw serration surface fitting portion 670 and the center grip contact portion 675.
- a fixing bolt receiver 680 is formed on the surface of the top cover 660. Further, the center portion of the end surface on the center side of the top cover 660, that is, the surface facing the spring hole (spring seat) 635 of the top plate 610 when the top cover 660 is installed in the top cover guide recess 630 of the top plate 610. Is formed with a spring hole (spring seat) 685.
- the structures and functions of the fixing bolt receiver 680 and the spring hole (spring seat) 685 are basically the same structures and functions as the fixing bolt receiver 380 and the spring seat 385 of the top cover 360 of the first embodiment.
- the top cover 660 of the second embodiment is greatly different from the top cover 360 of the first embodiment in the following two points.
- the first point is that the outer portions of the two master jaw surface fitting portions 670 are greatly extended along the direction of the master jaw surface fitting portion 670 to be formed in the master jaw side portion extending portion 665. It is.
- the second is that a configuration for ejecting air to the serration surface of the master jaw including the air ejection port 695 formed in the master jaw side portion extending portion 665 is formed.
- both outer portions of the master jaw serration surface fitting portion 670 are elongated along the direction in which the master jaw 120 is arranged. Yes.
- the master jaw side portion extending portion 665 extends over the entire side portions of the serration surfaces 125 and 126 of the master jaw 120 as shown in FIG. Arranged along.
- the top cover 660 of the second embodiment has a top cover air groove (chips) composed of a connection groove 691 and an extending portion air groove 692 as a structure for ejecting air to the serration surface of the master jaw.
- the connection groove 691 is a groove that connects the spring hole (spring seat) 685 and the end of the extending portion air groove 692.
- the extending portion air groove 692 is a groove formed along the inside of the master jaw side portion extending portion 665 (the side close to the serration surfaces 125 and 126 of the master jaw 120 (see FIG. 16)).
- the air ejection port 695 ejects the air flowed to the extending part air groove 692 to the serration surface of a master jaw. It is an opening for.
- the air outlet 695 is formed on the inner side of the extending portion air groove 692 and the master jaw side portion extending portion 665 so that an opening is formed on the inner end surface of the master jaw side portion extending portion 665.
- 15B and 15C it is formed so as to be aligned at a predetermined interval along the extending direction of the master jaw side portion extending portion 665 as shown in FIGS. 15B and 15C.
- FIG. 16 is a diagram schematically showing a state in which the top plate 610, the top cover 660, and the master jaw 120 according to the second embodiment are installed on the chuck body 110, and only one of the three locations is shown.
- 16A is a plan view
- FIG. 16B is a cross-sectional view of a portion M in FIG. 16A (a cross-sectional view taken along line RR in FIG. 16C)
- FIG. 16C is a side view of the portion M in FIG. 16A viewed from the direction N in FIG. 16A
- FIG. 16D is the view of FIG. 16B in the portion M in FIG.
- FIG. 17 is a cross-sectional view taken along the line PP and the line QQ in FIG.
- the air sent through the main shaft inner pipe 114 is a central circular hole 651, a spring hole connecting groove 652 and a spring of the top plate 610. It flows through the hole (spring seat) 635 and is sent to the top cover guide recess 630.
- the air sent to the top cover guide recess 630 of the top plate 610 flows through the connection groove 691 and the extension part air groove 692 of the top cover 660 through the spring hole (spring seat) 685 of the top cover 660, and FIG.
- the air is ejected in the direction of the master jaw 120 and the serration surfaces 125 and 126 of the claws from the air ejection port 695 formed for the extending portion air groove 692.
- the positional relationship between the air outlet 695 and the master jaw 120 and the serration surfaces 125 and 126 of the claws is such that the air jetted from the air outlet 695 is as shown in FIGS. 16 (C) and 16 (D).
- the positional relationship of jetting between the serrations (grooves) of the serration surfaces 125 and 126 of the master jaw 120 is adopted. Therefore, even when air is properly jetted onto the serration surfaces 125 and 126 of the master jaw 120 and chips and dust are present in the grooves of the serration, the chips and the like can be blown out and excluded. .
- the chips adhere to or accumulate on the claw, the master jaw, the master jaw insertion groove, or the chuck body on the lathe 1 or the like. This can be prevented appropriately, and the risk of occurrence of a chucking defect or a decrease in workpiece grasping accuracy (clamping accuracy) can be eliminated.
- the top plate 610 and the top cover 660 of the second embodiment it is possible to appropriately prevent chips from entering the serration surface of the master jaw when the workpiece is replaced or the claw is replaced. Can do.
- automatic operation, unmanned operation, maintenance-free operation, etc. of machine tools such as lathes are possible, and the desired cutting can be performed accurately and efficiently by these automatic operations, etc., and productivity and machine operation An increase in rate can be achieved.
- a sheet-like member for preventing air leakage may be installed between the end surface 112 of the chuck body 110 and the top plate 610.
- the sheet-like member has substantially the same outer shape as the top plate 610, and the portions corresponding to the central circular hole 651, the top cover guide recess 630, the bolt hole 639, etc. of the top plate air groove 650 on the lower surface of the top plate 610 are cut. It is a missing member. In some cases, the shape of the spring hole connecting groove 652 of the top plate air groove 650 may be further cut out.
- the material of the sheet-like member may be any material as long as it can seal between the end surface 112 of the chuck body 110 and the lower surface of the top plate 610, and may be any material such as a resin such as rubber, a metal, or a ceramic. However, it is preferable to use a material usually used as a packing or a gasket. By installing such a sheet-like member, it is possible to prevent air from flowing outside the intended flow path described above as the second embodiment, that is, to prevent air leakage, and to blow away chips and the like by air. The effect of the top cover set of the second embodiment described above that is excluded can be further enhanced.
- a sheet-like member is also one of the present invention
- a top cover set (chip / dust cover set) including such a sheet-like member is also within the scope of the present invention.
- the master jaw is the master jaw 120 having a cross-sectional shape in which the wide bottom portion and the narrow top portion are connected in two stages (see FIG. 2), and the groove 115 of the chuck body 110 into which the master jaw is inserted.
- the cross-sectional shape of the master jaw 120 has a cross-sectional shape in which the same wide bottom and narrow top are connected in two steps.
- the form of the master jaw and the master jaw insertion groove of the chuck body is not limited to this. For example, as shown in FIG.
- the master jaw may be a master jaw 120b having a cross-sectional shape having a wide bottom portion and a narrow upper portion in only one step.
- the groove of the chuck main body 110 also becomes a master jaw insertion groove 115b having a cross-sectional shape having only one step of a wide bottom portion and a narrow upper portion that are the same as the cross-sectional shape of the master jaw 120.
- the master jaw and the master jaw insertion groove of the chuck body may have such a configuration.
- the steered claw 200 has a configuration in which the steered claw body 201 and the serration pieces 271 and 272 are assembled and integrated by the serration piece mounting bolts 280 (see FIG. 3).
- claw main body with a steer, a horizontal serration piece, and a vertical serration piece is not restricted to this.
- these may be connected by two knock pins 282.
- the horizontal serration piece 271b and the vertical serration piece 272b are respectively arranged in the serration piece notches 203 and 204 (see FIG. 4) of the steering claw body 201b, and the serration pieces 271b and 272b are arranged.
- the knock pin 282 is inserted into the knock pin passage hole 207 formed so as to penetrate the steered claw body 201b, and both end surfaces 283 of the knock pin 282 are welded to the serration pieces 271b, 272b, thereby referring to FIG.
- a steered claw 200b having substantially the same configuration as the above-described steered claw 200 is formed.
- the number of bolts or knock pins for connecting the serration piece and the steered claw body is three for the steered claws shown in FIG. 3 and two for the steered claws shown in FIG. Any number may be used.
- the number of bolts and the like is determined to be a suitable number in accordance with the required strength, the size of the claw with a steer, and the like.
- the method of installing the steered claw 200 on the master jaw 120 with the rear grip 510 and the front grip 540 is as follows. First, as shown in FIG. , 540 (FIG. 7A), and then the steered claw 200 is moved from the upper side of the claw installation groove 123 of the master jaw 120 toward the claw installation groove 123 of the master jaw 120, and the steer 240 is moved to the claw installation groove 123. (FIG. 7B), and finally, the clamp bolt 570 is inserted and tightened.
- the method of installing the steered claw 200 on the master jaw 120 is not limited to this. For example, as shown in FIG. 19, the steered claw 200, the rear grip 510, and the front grip 540 are first connected to the clamp bolt 570. It is also possible to connect them by
- the claws 200 with the steering, the rear grip 510, and the front grip 540 are externally clamped. They are connected by 570 (FIG. 19A).
- the steered claw 200, the rear grip 510, and the front grip 540 connected by the clamp bolt 570 are inserted into the claw installation groove 123 of the master jaw 120 installed in the chuck body 110 from the outer periphery side of the chuck body 110.
- the steered claw 200 is placed at a predetermined position on the master jaw 120 (FIG. 19B).
- the clamp bolt 570 is loosened so that the steered claw 200 can be moved in the vertical direction (the depth direction of the claw installation groove 123 of the master jaw 120), and the steered claw 200 is sufficiently lifted upward. It is in a state to be able to.
- the clamp bolt 570 is tightened.
- the steered claw 200 is drawn downward relative to the grips 510 and 540, and the serrations 273 and 274 of the steered claw 200 are serrated.
- the serrations 125 and 126 of the master jaw 120 are deeply engaged, and the position of the claw 210 of the steered claw 200 is also positioned with high accuracy.
- the steered claw 200 When the steered claw 200 is installed on the master jaw 120 by such a method, the steered claw 200 is connected to the rear grip 510 and the front grip 540 from the beginning, so that the steered claw 200 drops off during mounting. It can be installed on the steered claw 200 more efficiently and safely.
- the top cover fixing bolts 340 of the top plates 310 and 610 are loosely engaged with the fixing bolt receivers 380 and 680 of the top covers 360 and 660, so that the top covers 360 and 660 can be moved.
- the top covers 360 and 660 can be fixed by screwing the top cover fixing bolts 340 as necessary.
- the master jaw 120 is rarely removed from the chuck main body 110, and the top cover fixing bolt 340 and the top covers 360, 660 of the top plates 310, 610 are not particularly required unless the top covers 360, 660 need to be fixed.
- the structure (chip / dust prevention cover fixing means) for loosely engaging the fixing bolt receivers 380 and 680 may be omitted. Even without this configuration, the object of the present invention to prevent chips from entering the chuck mechanism can be achieved without any influence.
- the spring is disposed as a biasing means that biases the force in the direction in which the top plates 310 and 610 and the top cover 360 and 660 are separated from each other.
- this spring is not limited to a so-called coil spring, and may be a leaf spring or the like, and any configuration can be used as long as it can bias the top covers 360 and 660 away from the top plates 310 and 610. May be used.
- claw with a steer (200, 200b) is a lateral serration piece (271) to a nail
- a configuration in which the steer (240) is attached to the claw (210) integrally formed with the serrations (273, 274) is also conceivable, and such a configuration may be used.
- a machine tool to which the present invention can be applied is not limited to a lathe.
- the present invention can be applied to any machine tool that processes a workpiece while being fixed to a chuck mechanism, such as a milling machine and a machining center.
- Top cover fixing bolt (Chip and dust prevention cover fixing means) 650 ... Top plate air groove 651 ... Center circular hole 652 ... Spring hole connection groove 360, 660 ... Top cover (chip and dust prevention cover) 665... Master jaw side portion extending portion 370, 670... Master jaw surface fitting portion (first close portion) 375,675 ... grip contact part (second close contact part) 380, 680 ... Fixing bolt holder (Chip / dust prevention cover fixing means) 385, 685 ... Spring seat (spring hole) 390 ... Spring 690 ... Top cover air groove (chip / dust prevention cover air groove) 691 ... Connection groove 692 ... Extension part air groove 695 ... Air jet 510,540: Grip
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Abstract
Description
放射状に配置されたマスタージョーの前記チャック端面の中心側の所定領域を覆う板面部と、
前記マスタージョーと当該マスタージョーに設置され当該マスタージョーと一体化された部材とを含むマスタージョー等移動部材に対して、当該マスタージョー等移動部材の前記中心側の端部に密接する密接部と、
前記マスタージョー等移動部材の前記チャック端面の径方向の所定の移動に対して、前記密接した状態を維持して当該切粉・粉塵防止カバーを追従させる付勢力を受ける受力部とを有する。
前記マスタージョーの径方向両側に沿って延伸するマスタージョー側部側延伸部と、
前記マスタージョー側部側延伸部に形成され、前記マスタージョーのセレーション面に気流を噴出するエアー噴出口と、
所定の箇所から供給される気流を前記エアー噴出口に供給する切粉・粉塵防止カバー空気溝と、をさらに有する。
前記の切粉・粉塵防止カバーを、前記チャック端面の径方向に移動自在に装着可能な切粉・粉塵防止カバー設置案内部と、
前記切粉・粉塵防止カバー設置案内部に装着された切粉・粉塵防止カバーに、前記付勢力を付与する付勢手段とを有する。
前記の切粉・粉塵防止カバーを、前記チャック端面の径方向に移動自在に装着可能な切粉・粉塵防止カバー設置案内部と、
前記切粉・粉塵防止カバー設置案内部に装着された切粉・粉塵防止カバーに、前記付勢力を付与する付勢手段と、
チャック本体に設置されたパイプを介して供給される気流を、前記切粉・粉塵防止カバーの前記切粉・粉塵防止カバー空気溝に供給するトッププレート空気溝とを有する。
また、本発明の切粉・粉塵防止カバーセットは、粉・粉塵防止カバー空気溝を有する前記の切粉・粉塵防止カバーと、トッププレート空気溝を有する前記のチャック端面プレートとを有する。
本発明の第1実施形態として、本発明の一実施形態の旋盤について、図1~図11を参照して説明する。
図1は、本発明の一実施形態の旋盤の概略構成を示す図である。
図1に示すように、本実施形態の旋盤1は、加工対象のワークを把握するチャック機構10、チャック機構10を回転駆動するモータ30、モータ30の回転動力をチャック機構10に伝達する主軸(スピンドル)40及びモータ30の動作等を制御する制御部50を有する。
チャック本体110は、円筒形状をなし、端面112に、マスタージョー120を設置するための径方向のマスタージョー挿入溝115が等配に3本形成されている。マスタージョー挿入溝115は、幅広の底部と幅狭の上部とが2段に連なった断面形状を有し、チャック本体の外周面から径方向に所定の長さに形成されている。チャック本体110の中心孔113には、端面112側から筒状のチャックカバー117が挿入設置されており、チャックカバー117の端面112側の端面は蓋118で覆われている。チャック本体110の内部には、マスタージョー挿入溝115に設置されたマスタージョー120に係合しマスタージョー120を径方向に移動させる図示せぬシフタ―が設置されている。
リアグリップ510及びフロントグリップ540は、マスタージョー120の爪設置溝123(図2参照)に挿入され、ステア付爪200のステア240(図3参照)を両側から挟み込むことにより、ステア付爪200をマスタージョー120に固定する(図7参照)。従って、グリップ510,540は、各々、マスタージョー120の爪設置溝123に内接し収容される形状の断面、すなわち爪設置溝123と同じT字形状の断面を有する金属製部材である。
図7(A)~図7(C)は、各々、ステア付爪200をマスタージョー120に設置する手順を説明するための図である。
なお、チャック本体110のマスタージョー挿入溝115には、マスタージョー120が設置されているものとする。
図8は、チャックが開いた状態のチャック本体110の端面112の状態を示す図であり、図9は、チャックが閉じた状態のチャック本体110の端面112の状態を示す図である。
なお、これらタップ332、トップカバー固定ボルト340及び固定ボルト受け380によるトップカバー360を固定するための構成が、特許請求の範囲等に記載の「切粉・粉塵防止カバー固定手段」に相当する。
本発明の第2実施形態として、トップカバーセット(切粉・粉塵防止カバーセット)300の他の形態について、図14~図16を参照して説明する。
旋盤等の工作機械を自動化あるいは無人化運転する場合には、マスタージョーのセレーション面、あるいはマスタージョーと爪との係合セレーション面(以下、単にマスタージョーのセレーション面125と称する)に、清掃のためのエアブローを行うのが好ましい。第2実施形態として示すトップカバーセットは、マスタージョーのセレーション面にエアブローを行うことのできるトップカバーセットである。
図14(A)には、第2実施形態のトッププレート610と第1実施形態のトッププレート310との相違が明確になるように、第1実施形態のトッププレート310を二点鎖線により示す。図14(A)に示すように、第2実施形態の第2トッププレート610は、第1実施形態のトッププレート310のマスタージョー進入用切り欠き320及びトップカバー案内凹部330を、チャック本体110の端面112の外周まで拡大した構成である。
図16は、チャック本体110に、第2実施形態に係るトッププレート610及びトップカバー660、及び、マスタージョー120を設置した状態を模式的に示す図であって、3箇所のうち1箇所のみを示す図であり、図16(A)は平面図、図16(B)は図16(A)におけるMの部分の断面図(図16(C)のR-Rにおける断面図)、図16(C)は図16(A)のMの部分を図16(A)のNの方向から見た側面図、図16(D)は、図16(A)のMの部分の図16(B)のP-P及び図16(C)のQ-Qにおける断面図である。
このようなシート状部材を設置することにより、第2実施形態として前述した意図した流路以外へエアーが流れること、すなわち、エアーの漏洩を防止することができ、エアーにより切粉等を吹き飛ばして除外するという前述した第2実施形態のトップカバーセットの作用効果を一層高めることができる。
なお、本発明は前述した実施形態に限られるものではなく、任意好適な種々の改変が可能である。
例えば、前述した実施形態においてマスタージョーは、幅広の底部と幅狭の上部とが2段に連なった断面形状のマスタージョー120であり(図2参照)、これが嵌挿されるチャック本体110の溝115もマスタージョー120の断面形状と同じ幅広の底部と幅狭の上部とが2段に連なった断面形状を有するものであった。しかしながら、マスタージョー及びチャック本体のマスタージョー挿入溝の形態はこれに限られるものではない。例えば図17に示すように、マスタージョーは、幅広の底部と幅狭の上部とを1段のみ有する断面形状のマスタージョー120bであってもよい。この場合は、チャック本体110の溝も、マスタージョー120の断面形状と同じ幅広の底部と幅狭の上部とを1段のみ有する断面形状のマスタージョー挿入溝115bとなる。このように、マスタージョー及びこれが嵌挿されるチャック本体のマスタージョー挿入溝の断面形状を簡単にすることにより、マスタージョーをチャック本体に装着する際の作業が容易になる。マスタージョー及びチャック本体のマスタージョー挿入溝は、このような構成であってもよい。
10…チャック機構
110…チャック本体
120,120b…マスタージョー
200,200b…ステア付爪
201,201b…ステア付爪本体
210…爪(生爪、ソフトジョー)
240…ステア
300…トップカバーセット(切粉・粉塵防止カバーセット)
310,610…トッププレート
320,620…マスタージョー進入用切り欠き
330,630…トップカバー案内凹部
332,632…タップ(切粉・粉塵防止カバー固定手段)
335,635…バネ座(スプリング孔)
339,639…ボルト穴
340…トップカバー固定ボルト(切粉・粉塵防止カバー固定手段)
650…トッププレート空気溝
651…中心円形孔
652…スプリング孔接続溝
360,660…トップカバー(切粉・粉塵防止カバー)
665…マスタージョー側部側延伸部
370,670…マスタージョーセレーション面嵌合部(第1の密接部)
375,675…グリップ当接部(第2の密接部)
380,680…固定ボルト受け(切粉・粉塵防止カバー固定手段)
385,685…バネ座(スプリング孔)
390…スプリング
690…トップカバー空気溝(切粉・粉塵防止カバー空気溝)
691…接続溝
692…延伸部空気溝
695…エアー噴出口
510、540…グリップ
Claims (12)
- チャック端面に設置される切粉・粉塵防止カバーであって、
放射状に配置されたマスタージョーの前記チャック端面の中心側の所定領域を覆う板面部と、
前記マスタージョーと当該マスタージョーに設置され当該マスタージョーと一体化された部材とを含むマスタージョー等移動部材に対して、当該マスタージョー等移動部材の前記中心側の端部に密接する密接部と、
前記マスタージョー等移動部材の前記チャック端面の径方向の所定の移動に対して、前記密接した状態を維持して当該切粉・粉塵防止カバーを追従させる付勢力を受ける受力部と
を有する切粉・粉塵防止カバー。 - 前記密接部は、前記マスタージョーのセレーション面部分の前記中心側に密接する第1の密接部を有する請求項1に記載の切粉・粉塵防止カバー。
- 前記密接部は、マスタージョー等移動部材の前記マスタージョーのセレーション面部分以外の部分に密接する第2の密接部を有する請求項1に記載の切粉・粉塵防止カバー。
- 前記マスタージョーの径方向両側に沿って延伸するマスタージョー側部側延伸部と、
前記マスタージョー側部側延伸部に形成され、前記マスタージョーのセレーション面に気流を噴出するエアー噴出口と、
所定の箇所から供給される気流を前記エアー噴出口に供給する切粉・粉塵防止カバー空気溝と
をさらに有する請求項1に記載の切粉・粉塵防止カバー。 - チャック端面に設置されるチャック端面プレートであって、
請求項1に記載の切粉・粉塵防止カバーを、前記チャック端面の径方向に移動自在に装着可能な切粉・粉塵防止カバー設置案内部と、
前記切粉・粉塵防止カバー設置案内部に装着された切粉・粉塵防止カバーに、前記付勢力を付与する付勢手段と
を有するチャック端面プレート。 - チャック端面に設置されるチャック端面プレートであって、
請求項4に記載の切粉・粉塵防止カバーを、前記チャック端面の径方向に移動自在に装着可能な切粉・粉塵防止カバー設置案内部と、
前記切粉・粉塵防止カバー設置案内部に装着された切粉・粉塵防止カバーに、前記付勢力を付与する付勢手段と、
チャック本体に設置されたパイプを介して供給される気流を、前記切粉・粉塵防止カバーの前記切粉・粉塵防止カバー空気溝に供給するトッププレート空気溝と
を有するチャック端面プレート。 - 請求項1に記載の切粉・粉塵防止カバーと、
チャック端面に設置されるチャック端面プレートであって、
前記切粉・粉塵防止カバーが、前記チャック端面の径方向に移動自在に装着される切粉・粉塵防止カバー設置案内部と、
前記切粉・粉塵防止カバー設置案内部に装着された切粉・粉塵防止カバーに、前記付勢力を付与する付勢手段と
を有するチャック端面プレートと
を有する切粉・粉塵防止カバーセット。 - 請求項4に記載の切粉・粉塵防止カバーと、
チャック端面に設置されるチャック端面プレートであって、
前記切粉・粉塵防止カバーが、前記チャック端面の径方向に移動自在に装着される切粉・粉塵防止カバー設置案内部と、
前記切粉・粉塵防止カバー設置案内部に装着された切粉・粉塵防止カバーに、前記付勢力を付与する付勢手段と、
チャック本体に設置されたパイプを介して供給される気流を、前記切粉・粉塵防止カバーの前記切粉・粉塵防止カバー空気溝に供給するトッププレート空気溝と
を有するチャック端面プレートと
を有する切粉・粉塵防止カバーセット。 - 放射状に配置された複数のマスタージョーに対する複数の前記切粉・粉塵防止カバーと、
複数の前記切粉・粉塵防止カバーに対する複数の前記切粉・粉塵防止カバー設置案内部と、 複数の前記切粉・粉塵防止カバーに対する複数の前記付勢手段とを有する前記チャック端面プレートと
を有する請求項7に記載の切粉・粉塵防止カバーセット。 - 前記切粉・粉塵防止カバー及び前記チャック端面プレートの前記切粉・粉塵防止カバー設置案内部に構成され、前記切粉・粉塵防止カバーの移動範囲を規定する切粉・粉塵防止カバー固定手段を有する請求項7に記載の切粉・粉塵防止カバーセット。
- 請求項7~10のいずれかに記載の切粉・粉塵防止カバーセットを有するチャック機構。
- 請求項11に記載のチャック機構を有する工作機械。
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CN201780037085.2A CN109311100B (zh) | 2016-11-15 | 2017-11-15 | 防切削粉和粉尘的罩、防切削粉和粉尘的罩组件、卡盘机构及机床 |
JP2018551658A JP7082415B2 (ja) | 2016-11-15 | 2017-11-15 | 切粉・粉塵防止カバー、切粉・粉塵防止カバーセット、チャック機構及び工作機械 |
EP17871314.5A EP3466575A4 (en) | 2016-11-15 | 2017-11-15 | CHIP / DUST PREVENTION COVER, CHIP / DUST PREVENTION COVER ASSEMBLY, CHUCK MECHANISM AND MACHINE TOOL |
KR1020187036611A KR102133361B1 (ko) | 2016-11-15 | 2017-11-15 | 절삭부스러기·분진 방지커버、절삭부스러기·분진 방지커버세트、척기구 및 공작기계 |
US16/309,358 US10953475B2 (en) | 2016-11-15 | 2017-11-15 | Chip/dust prevention cover, chip/dust prevention cover set, chuck mechanism, and machine tool |
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Cited By (9)
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JP2020062710A (ja) * | 2018-10-16 | 2020-04-23 | 有限会社 シンセテック | チャック機構、爪装着アダプタ、及び切粉・粉塵防止カバー |
JP7327771B2 (ja) | 2018-10-16 | 2023-08-16 | 有限会社 シンセテック | チャック機構、爪装着アダプタ、及び切粉・粉塵防止カバー |
WO2020196582A1 (ja) * | 2019-03-27 | 2020-10-01 | 豊和工業株式会社 | チャックの防塵機構およびチャック |
JPWO2020196582A1 (ja) * | 2019-03-27 | 2021-04-08 | 豊和工業株式会社 | チャックの防塵機構およびチャック |
TWI737241B (zh) * | 2019-03-27 | 2021-08-21 | 日商豐和工業股份有限公司 | 夾頭的防塵機構及夾頭 |
KR20210125571A (ko) * | 2019-03-27 | 2021-10-18 | 호와고교 가부시키가이샤 | 척의 방진 기구 및 척 |
KR102579143B1 (ko) * | 2019-03-27 | 2023-09-18 | 호와고교 가부시키가이샤 | 척의 방진 기구 및 척 |
CN112605798A (zh) * | 2020-12-15 | 2021-04-06 | 铜陵市开发区柏川汽车修理服务部 | 一种汽车零部件加工装置 |
CN112605798B (zh) * | 2020-12-15 | 2022-06-14 | 铭宇科技(娄底)有限公司 | 一种汽车零部件加工装置 |
Also Published As
Publication number | Publication date |
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CN109311100B (zh) | 2020-12-11 |
JPWO2018092797A1 (ja) | 2019-10-24 |
KR102133361B1 (ko) | 2020-07-13 |
EP3466575A1 (en) | 2019-04-10 |
JP7082415B2 (ja) | 2022-06-08 |
US10953475B2 (en) | 2021-03-23 |
EP3466575A4 (en) | 2020-03-04 |
KR20190008921A (ko) | 2019-01-25 |
CN109311100A (zh) | 2019-02-05 |
US20190329325A1 (en) | 2019-10-31 |
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