JP2022044132A - Loader device, and method for chucking workpiece using the same - Google Patents

Abstract

To provide a loader device capable of highly accurately positioning and attaching a workpiece to the spindle chuck means of a processing device.SOLUTION: A loader device has a loader holding unit 42 to be moved by a loader moving mechanism, where the loader holding unit 42 comprises first and second loader chucking means 6 for holding a workpiece P. The first loader chucking means 6 includes a plurality of first loader holding members 60 that are attached in a freely openable/closable manner to a first attachment part 48 of the loader holding unit 42, and extrusion means 67 for extruding the workpiece P to a front side is provided in association with the first loader chucking means 6, where the extrusion means 7 has an inclined extrusion part which extrudes the workpiece P in an obliquely upward direction. The inclined extrusion part is constituted, for example, from a V-shaped inclined groove extending by inclining downward to the front side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a loader device for transporting a work piece to a work area of the work piece and a chucking method for the work piece using the loader device.

A loader device is widely used as a device for transporting a work piece to a processing device (for example, NC lathe) (see, for example, Patent Document 1). This loader device includes a loader holding unit that holds and conveys a workpiece and a loader moving mechanism for moving the loader holding unit as required. The loader holding unit can be attached to and detached from the workpiece. First and second loader chuck means for holding are provided. The first loader chuck means is used, for example, to convey an unprocessed work piece to be machined (hereinafter, also referred to as “raw work piece”) to a processing apparatus, and the held unprocessed workpiece is transferred to the processing apparatus. It is delivered to the spindle chuck means, and the second loader chuck means is used, for example, to take out a machined work piece (hereinafter, also referred to as “finished work piece”) machined by a processing device, and the spindle chuck of the processing device. Receives and transports the processed work piece held by the means.

When this loader device is used, as described above, the workpiece held and machined by the spindle chuck means of the machining device (processed workpiece) is delivered to, for example, the second loader chuck means. After taking out, for example, the workpiece held in the first loader chuck means can be handed over to the spindle chuck means of the machining apparatus and attached, whereby the workpiece is automatically attached to the machining apparatus and processed. It becomes possible.

Japanese Unexamined Patent Publication No. 2009-178831

The conventional loader device has a general shape of the workpiece, for example, a member having a cylindrical outer shape (that is, a member having a circular cross section), for example, a cylindrical member, a cylindrical shaft member, or a disk shape. There is a problem that it is difficult to handle specially shaped workpieces for members and the like.

For example, when a workpiece having a cylindrical portion on one end side and a rectangular portion on the other end side is conveyed by a loader device for automatic machining, the rectangular portion of the workpiece is held by the spindle chuck means of the machining apparatus. In the automatic machining of such a workpiece, the rectangular portion of the workpiece cannot be positioned with high accuracy and held by the chuck. Therefore, there is a problem that it is difficult to process the cylindrical portion of the workpiece with high accuracy.

An object of the present invention is to provide a loader device capable of positioning and attaching a workpiece with high accuracy to the spindle chuck means of the machining device.

Another object of the present invention is to provide a chucking method for a workpiece capable of positioning a rectangular portion of the workpiece with high accuracy and holding the chuck in the spindle chuck means of the machining apparatus.

The loader device of the present invention includes a loader holding unit that is moved by a loader moving mechanism, and the loader holding unit is a loader device provided with first and second loader chuck means for holding the workpiece.
The first loader chuck means includes a plurality of first loader holding members mounted so as to be openable and closable, and is attached to the first mounting portion of the loader holding unit, and the second loader chuck means is openable and closable. It is provided with a plurality of second loader holding members mounted on the loader holding unit, and is mounted on the second mounting portion of the loader holding unit.
Further, in connection with either one or both of the first and second loader chuck means, an extrusion means for extruding the workpiece forward is provided, and the extrusion means obliquely upwards or diagonally upwards the workpiece. It is characterized by having an inclined extrusion portion that is extruded diagonally downward.

Further, the method for chucking a workpiece of the present invention is a method for chucking a workpiece in which the workpiece is delivered from a loader device for transporting the workpiece to a spindle chuck means of the machining apparatus.
The loader device includes a loader holding unit that is moved by a loader moving mechanism, and the loader holding unit includes a loader chuck means for holding a cylindrical portion on one end side of the workpiece and a loader chuck means for holding the workpiece on the front side. The extruding means includes an extruding means for extruding the work piece obliquely upward or diagonally downward.
The spindle chuck means of the processing apparatus has four spindle chuck holding portions arranged at intervals in the circumferential direction, and the four spindle chuck holding portions have a rectangular shape on the other end side of the workpiece. It is configured to hold the four corners of the part,
When the workpiece is delivered from the loader chuck means of the loader device to the spindle chuck means of the processing apparatus, the loader chuck means holding the workpiece is positioned at a position facing the spindle chuck means, and then. As the loader chuck means is opened, the extrusion means is moved to the front side, whereby the workpiece held by the loader chuck means is pushed out diagonally upward or diagonally downward toward the front side. Then, the spindle chuck means is pressed against the pair of upper spindle chuck holding portions or the lower pair of spindle chuck holding portions of the spindle chuck means in the open state, and then the spindle chuck means is rotated somewhat in a predetermined direction, whereby the spindle chuck means is rotated somewhat in a predetermined direction. The work piece is placed on a pair of spindle chuck holding portions diagonally on the lateral side of the spindle chuck means in a state of being positioned on the pair of spindle chuck holding portions on the upper side or the pair of spindle chuck holding portions on the lower side. It is characterized in that after being pressed, the spindle chuck means is closed and the four chuck holding portions chuck the rectangular portion of the workpiece.

According to the loader device of the present invention, an extrusion means is provided in connection with one or both of the first and second loader chuck means of the loader holding unit, and the extrusion means obliquely upwards (or diagonally) the workpiece. Since it has an inclined extrusion section that extrudes toward (downward), when the workpiece is delivered from the loader chuck means related to the extrusion means to the spindle chuck means on the processing apparatus side, the extrusion means is moved to the front side for processing. The object is pushed out toward the spindle chuck means. At this time, the inclined extruded portion of the extrusion means acts on the workpiece and pushes it diagonally upward (or diagonally downward), whereby the workpiece is moved to the upper end portion (or lower end portion) of the chuck receiving portion of the spindle chuck means. Positioned to abut. Therefore, by using such a loader device, the workpiece can be accurately positioned on the chuck receiving portion of the spindle chuck means, and as a result, the workpiece to be machined by the machining apparatus can be accurately positioned on the spindle chuck means. It is possible to hold the chucking.

Further, according to the chucking method of the workpiece of the present invention, the loader holding unit of the loader device is a loader chuck means for holding the cylindrical portion on one end side of the workpiece and for pushing the workpiece forward. The extruding means has an inclined extrusion unit that extrudes the workpiece diagonally upward (or diagonally downward), and the spindle chuck means of the processing apparatus has four spindle chuck holders. The four spindle chuck holding portions are configured to hold the square portion of the rectangular portion on the other end side of the workpiece.

When the workpiece is delivered from the loader device to the machining apparatus side, the loader chuck means is opened and the extrusion means is moved to the front side, whereby the workpiece is obliquely upward (or diagonally) toward the front side. A pair of spindle chuck holding portions on the upper side of the spindle chuck means in the open state, that is, the upper end portion of the spindle chuck receiving portion (or a pair of spindle chuck portions on the lower side, that is, the lower end portion of the spindle chuck receiving portion). Is pressed against. After that, the spindle chuck means is rotated somewhat in a predetermined direction, whereby the work piece is positioned on the pair of upper spindle chuck holding portions (or the pair of lower spindle chuck holding portions), and the spindle chuck means is positioned. Since the spindle chuck means is closed after being pressed against the pair of spindle chuck holding portions located diagonally on the lateral side of the machine and positioned in this way, the workpiece is held by the four chuck holding portions on the processing device side. It is possible to chuck and hold the rectangular portion of the above with high accuracy.

FIG. 3 is a cross-sectional view showing a part of the loader device of the present invention and the spindle chuck means on the processing device side. FIG. 1 is a cross-sectional view briefly showing a spindle chuck means on the processing apparatus side of FIG. 1 and a configuration related thereto. The perspective view which shows the loader holding unit of the loader apparatus of FIG. FIG. 3 is a cross-sectional view showing a first loader chuck means of the loader holding unit of FIG. 3 and a configuration related thereto. FIG. 5A is a simplified explanatory view showing a state before the workpiece is delivered from the first loader chuck means on the loader device side to the spindle chuck means on the processing device side, and FIG. 5B is a simplified explanatory view showing the state before the workpiece is delivered to the spindle chuck means. A simplified explanatory view showing a state in which a workpiece is extruded from the means to the spindle chuck means side. 6 (a) is a simplified explanatory view showing the positional relationship between the four spindle chuck holding portions and the workpiece when the workpiece is extruded from the first loader chuck means to the spindle chuck means side, and FIG. 6 (b) is a simplified explanatory view. , A simplified explanatory view showing a state in which the spindle chuck means is further rotated in a predetermined direction from the state shown in FIG. 6A.

Hereinafter, an embodiment of a loader device (and a method of chucking a workpiece) according to the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 3, the illustrated loader device 2 (see FIGS. 1 and 3) transfers the raw workpiece P (raw workpiece) from the workpiece supply area (not shown) to the machining apparatus 4 (for example, FIG. 3). NC lathe) (see FIGS. 1 and 2) is transported to the machining area, and the machined workpiece P (finished workpiece) is taken out from the machining apparatus 4 and transported to the workpiece discharge area (not shown). Is. In this embodiment, as will be understood from the later description, the loader device 2 includes first and second loader chuck means 6 and 8, for example, the first loader chuck means 6 processes the unprocessed workpiece P into the machining device 2. It is used to convey to the spindle chuck means 10 on the side, for example, the second loader chuck means 8 is used to take out the processed workpiece P from the spindle chuck means 10 and convey it.

With reference to FIGS. 1 and 2, the spindle chuck means 10 on the processing apparatus 4 (for example, NC lathe) side and the configuration related thereto will be described. The processing device 4 includes a spindle housing portion 12, and the spindle 14 is rotatably supported by the spindle housing portion 12, and the spindle 14 is driven and connected to, for example, a spindle drive source (not shown) composed of an electric motor. ing. A flange member 16 is attached to one end of the main shaft 14, an auxiliary flange member 18 is attached to one end of the flange member 16, and the flange member 16 and the auxiliary flange member 18 rotate integrally with the main shaft 14. Move.

The accommodation space 20 is defined through the main shaft 14, the flange member 16, and the auxiliary flange member 18, and the main shaft chuck means 10 and related members are accommodated in the accommodation space 20. In this embodiment, the spindle chuck means 10 is composed of a collet chuck 22, and the collet chuck 22 is housed over a flange member 16 and an auxiliary flange member 18. Four slits 24 (see FIG. 6) are formed on one end side (tip side) of the collet chuck 22 at intervals in the circumferential direction, and the spindle chuck holding portion 26 is provided by these four slits 24. These spindle chuck holding portions 26 will be described later.

On the outer peripheral surface of one end (tip) of the collet chuck 22, an outer tapered portion 28 whose outer diameter expands in a tapered shape toward one end (tip) (right in FIGS. 1 and 2) is provided, and an auxiliary portion is provided. The inner peripheral surface of the flange member 18 is provided with an inner tapered portion 30 whose inner diameter expands in a tapered shape toward the tip end side corresponding to the outer tapered portion 28 of the collet chuck 22. Since the collet chuck 22 is configured in this way, the outer tapered portion 28 of the collet chuck 22 is pressed against the inner tapered portion 30 of the auxiliary flange member 18, so that the four spindle chuck holding portions 26 are elastically deformed and closed in the radial direction. In addition, the outer tapered portion 28 of the collet chuck 22 is separated from the inner tapered portion 30 of the auxiliary flange member 18, so that the four spindle chuck holding portions 26 return to the outer side in the radial direction and are in an open state.

Further, a sleeve member 32 is accommodated in the accommodation space 20 of the main shaft 14, and one end of the sleeve member 32 and the other end (rear end) of the collet chuck 22 are connected via a connecting sleeve 34. Therefore, the sleeve member 32, the connecting sleeve 34, and the collet chuck 22 rotate integrally and move integrally in the axial direction (left-right direction in FIGS. 1 and 2) of the main shaft 14. Further, although not specifically shown, the main shaft 14 and the sleeve member 32 rotate integrally, but the sleeve member 32 and the connecting sleeve 34 are connected to the main shaft 14 (and the flange member 16 and the auxiliary flange member 18). And the collet chuck 22 is configured to move relatively in the axial direction (left-right direction in FIGS. 1 and 2) of the main shaft 14.

An opening / closing driving means (not shown) is provided in connection with the collet chuck 22, and the opening / closing drive means causes the sleeve member 32, the connecting sleeve 34, and the collet chuck 22 to open in the opening direction indicated by the arrow 36 and closed by the arrow 38. Moved in the direction.

Next, the configuration of the loader device 2 will be described with reference to FIGS. 1, 3 and 4. The loader device 2 includes a loader holding unit 42 that is moved as required by a loader moving mechanism (not shown). The loader moving mechanism includes a lateral moving mechanism (not shown) for moving the loader holding unit 42 in the axial direction (left-right direction in FIG. 1) of the spindle 14 of the machining device 4, and the loader holding unit 42 as the machining device 4. Includes a front-back movement mechanism (not shown) for moving the loader in the front-back direction, and an up-and-down movement mechanism (not shown) for moving the loader holding unit 42 up and down in the up-down direction (up-down direction in FIG. 1). The loader movement mechanism including the lateral movement mechanism, the front-back movement mechanism, and the elevating movement mechanism may have a structure known in itself.

The illustrated loader holding unit 42 includes a unit body 44, the unit body 44 is attached to the mounting body 46, and the mounting body 46 is moved as required by a loader moving mechanism (not shown). The first loader chuck means 6 is attached to the first mounting portion 48 of the unit main body 44, and the second loader chuck means 8 is attached to the second mounting portion 50. The first loader chuck means 6 and the second loader chuck means 8 have substantially the same configuration, and the first loader chuck means 6 (second loader chuck means 8) will be described below.

The first loader chuck means 6 (second loader chuck means 8) includes a first support main body 52 (second support main body 54), and the first support main body 52 (second support main body 54) is the first. It is mounted on the first mounting surface 56 (second mounting surface 58) of the mounting portion 48 (second mounting portion 50). A plurality of (three in a specific example) first loader holding members 60 (second loader holding member 62) are mounted on the first support main body portion 52 (second support main body portion 54) at intervals in the circumferential direction. The first loader holding member 60 (second loader holding member 62) is, for example, a first opening / closing cylinder mechanism (second opening / closing cylinder mechanism) as a first opening / closing drive source (second opening / closing drive source) (not shown). ) Moves in the radial direction. A first holding claw 64 (second holding claw 66) protruding inward in the radial direction is attached to the tip of a plurality of first loader holding members 60 (second loader holding member 62), and these first holding claws 64 (second holding claws 64) are attached. The second holding claw 66) holds and holds the work piece P as described later.

Since it is configured in this way, for example, when a pressure fluid (for example, compressed air) is supplied to the open side port of the first open / close cylinder mechanism (second open / close cylinder mechanism) (not shown), the first The first loader holding member 60 (second loader holding member 62) of the loader chuck means 6 (second loader chuck means 8) is moved outward in the radial direction, and the first loader chuck means 6 (second loader chuck means 8) is moved outward. ) Is in the open state, and the holding and holding of the work piece P is released. Further, when the pressure fluid is supplied to the closed side port of the first opening / closing cylinder mechanism (second opening / closing cylinder mechanism), the first loader holding member 60 (second loader holding member 62) is moved inward in the radial direction. The first loader chuck means 6 (second loader chuck means 8) is closed, and the workpiece P is sandwiched and held.

In this embodiment, the loader holding unit 42 is further configured as follows. The first mounting surface 56 of the first mounting portion 48 of the unit main body 44 and the second mounting surface 58 of the second mounting portion 50 are configured to be at right angles. Further, the base mounting surface of the mounting body 46 is inclined at 45 degrees with respect to the horizontal direction and spreads, and the swivel axis extending perpendicular to the base mounting surface (that is, at an angle of 45 degrees diagonally downward with respect to the horizontal direction). The unit main body 44 is attached to the mounting main body 46 so as to be rotatable around the extending axis). Further, in connection with the unit main body 44, a swivel cylinder mechanism (not shown) as a unit swivel drive source for swiveling the unit body 44 is provided.

When a pressure fluid (for example, compressed air) is supplied to one port of the swivel cylinder mechanism, the unit main body 44 is swiveled 180 degrees in a predetermined direction to enter the first swivel state shown in FIGS. 1 and 3, and the first swivel state is reached. The loader chuck means 6 faces the spindle chuck means 10 of the processing device 4, and the second loader chuck means 8 faces downward (note that in FIG. 1, the second loader chuck means 8 is omitted. Yes). Further, when the pressure fluid is supplied to the other port of the swivel cylinder mechanism, the unit main body 44 is swiveled 180 degrees in the direction opposite to the predetermined direction to enter the second swivel state, which is not shown, but is a second loader chuck. The means 8 faces the spindle chuck means 10 of the processing device 4, and the first loader chuck means 6 faces downward.

The loader device 2 is further provided with an extrusion means 67 for extruding the workpiece P in connection with the first loader chuck means 6. The illustrated extrusion means 67 is composed of an extrusion member 70 having an protrusion action portion 69, and a V-shaped inclined groove 71 is provided on the upper portion of the protrusion action portion 69. The V-shaped inclined groove 71 extends linearly downward toward the front side (that is, the spindle chuck means 10 side), and the width and depth of the V-shaped inclined groove 71 are larger toward the front side. (See FIGS. 3 to 5). The V-shaped inclined groove 71 functions as an inclined extruded portion for extruding the work piece P, as will be understood from the description described later.

The extrusion means 67 further includes an extrusion cylinder mechanism 72 (for example, a pneumatic cylinder mechanism) as an extrusion drive source for moving the extrusion member 70, and the output portion 74 of the extrusion cylinder mechanism 72 is a connection mounting portion 76. It is attached to the extrusion member 70 via. When a pressure fluid (for example, compressed air) is supplied to the contraction side port of the extrusion cylinder mechanism 72, the output portion 74 contracts and the extrusion member 70 moves in the direction indicated by the arrow 78 (see FIG. 5A). It recedes and is positioned at the receding position shown in FIGS. 3 and 4. In this retracted position, as shown in FIG. 5A, the protruding action portion 69 of the extrusion member 70 is located behind the first holding claw 64 of the first loader holding member 60, and the first loader chuck means. It does not act on the workpiece P sandwiched between the plurality of first holding claws 64 of 6.

Further, when the pressure fluid is supplied to the extension side port of the extrusion cylinder mechanism 72, the output unit 74 expands and the extrusion member 70 advances in the direction indicated by the arrow 80 (see FIG. 5B). It is positioned at the extrusion position shown in 1. At this extrusion position, as shown in FIG. 5B, the protrusion action portion 69 (V-shaped inclined groove 71) of the extrusion member 70 is held by the first holding claw 64 of the first loader holding member 60. It acts on the workpiece P and pushes the workpiece P toward the collet chuck 22 side of the processing apparatus 4.

In the workpiece P used in this embodiment, as shown in FIGS. 1 and 3 to 6, a cylindrical portion 82 is provided on one end side thereof, and the outer shape thereof is formed in a cylindrical shape. The plurality of first loader holding members 60 (first holding claws 64) of the chuck means 6 and the plurality of second loader holding members 62 (second holding claws 66) of the second loader chuck means 8 are the cylinders of the workpiece P. The shape portion 82 is sandwiched and held. Further, a rectangular portion 84 is provided on the other end side of the workpiece P, and the outer shape thereof is formed in a rectangular shape. The rectangular portion 84 of the above is sandwiched and held.

Corresponding to the rectangular portion 84 of the workpiece P, the tip portion of the collet chuck 22 is configured as follows. In this embodiment, a chuck receiving portion 86 is provided inside the four spindle chuck holding portions 26 (26a to 26d) in the radial direction, and the chuck receiving portion 86 corresponds to the outer shape of the rectangular portion 84 of the workpiece P. And it is configured in a rectangular shape. As shown in FIGS. 6A and 6B, the radial inner portions of the spindle chuck holding portions 26 (26a to 26d) are at right angles to hold the corner portions of the rectangular portion 84 of the workpiece P. The receiving portions 88 (88a to 88d) are provided, and for example, the upper surface side of the rectangular portion 84 of the workpiece P is sandwiched by the right-angled receiving portions 88a and 88b of the pair of upper spindle chuck holding portions 26a and 26b. For example, the lower surface side of the rectangular portion 84 is sandwiched by the right-angle receiving portions 88c and 88d of the pair of lower spindle chuck holding portions 26c and 26d, for example, the right-angle receiving portions of the pair of spindle chuck holding portions 26a and 26d on the left side. The left side of the rectangular portion 84 is sandwiched by 88a and 88d, and the right side of the rectangular portion 84 is sandwiched by, for example, the right angle receiving portions 88b and 88c of the pair of spindle chuck holding portions 26b and 26c on the right side. ..

In this embodiment, the stopper member 90 is attached so that the rectangular portion 84 of the workpiece P does not excessively enter the chuck receiving portion 86 of the collet chuck 22 (see FIGS. 2 and 5). In this embodiment, the stopper member 90 is attached to the front surface of the auxiliary flange member 18, and the slit 24 of the collet chuck 22 (the slit 24 between the pair of spindle chuck holding portions 26a and 26b and the pair of spindle chuck holding portions 26c and 26d). It extends in the vertical direction through the slit 24) between them and the chuck receiving portion 86.

The intermediate portion 92 in the longitudinal direction of the stopper member 90 is formed in a substantially rectangular concave shape, the intermediate portion 92 is located in the chuck receiving portion 86 of the collet chuck 22, and the front surface of the intermediate portion 92 functions as a stopper surface. Therefore, when the workpiece P is delivered to the collet chuck 22 as described later, the other end surface of the workpiece P (the surface of the rectangular portion 84) abuts on the stopper surface of the stopper member 90, whereby the workpiece P is processed. The object P is further prevented from being inserted into the chuck receiving portion 86.

Next, with reference mainly to FIGS. 1, 5 and 6, for example, delivery of the workpiece P held by the first loader chuck means 6 on the loader device 2 side to the machining device 4 side will be described. When the loader holding unit 42 is conveyed toward the collet chuck 22 of the machining apparatus 4, for example, the unprocessed workpiece P is held by the first loader chuck means 6, but the second loader chuck means 8 is empty. It is in the state of. When the loader holding unit 42 is moved to the machining area of the machining apparatus 4, first, the processed workpiece P held by the collet chuck 22 of the machining apparatus 4 is delivered to the second loader chuck means 8.

At this time, the loader holding unit 42 is held in the second turning state, and the empty second loader chuck means 8 is positioned at a position facing the collet chuck 22 on the processing apparatus 4 side. Then, in such a state, the second loader holding member 62 of the second loader chuck means 8 is closed to sandwich the machined work piece P, and then the spindle chuck holding portion 26 of the collet chuck 22 is opened. The holding of the workpiece P is released, and the processed workpiece P is delivered from the collet chuck 22 on the machining apparatus 4 side to the second loader chuck means 8 on the loader device 2 side in this way.

When the collet chuck 22 releases the holding of the workpiece P, the sleeve member 32 is moved in the direction indicated by the arrow 36. When thus moved, the collet chuck 22 is moved to the front side (right side in FIGS. 1 and 2) via the connecting sleeve 34, whereby the inner tapered portion 30 of the auxiliary flange member 18 and the outer tapered portion 28 of the collet chuck 22 are moved. The pressure welding state of is released. When the pressure contact state is released in this way, the plurality of spindle chuck holding portions 26 of the collet chuck 22 move slightly outward in the radial direction and return to the original state, and thus the collet chuck 22 is opened. , The holding and holding of the workpiece P by the plurality of spindle chuck holding portions 26 is released.

To attach the raw workpiece P to the collet chuck 22 from which the workpiece P has been removed, the loader holding unit 42 is held in the first swivel state as shown in FIGS. 1 and 3, and the raw workpiece P is held. The first loader chuck means 6 holding the

In this delivery of the workpiece P, first, the loader holding unit 42 is moved from the state shown in FIG. 5A to the front side (left side in FIGS. 1, 3 and 5), and the first loader chuck means 22 is moved to FIG. 5 Position it at the clamp position (delivery position) shown in (b). Then, as shown in FIG. 5B, the first loader chuck means 6 is opened, and the extrusion member 70 of the extrusion means 67 is advanced in the direction indicated by the arrow 80 to move the workpiece P to the processing apparatus 4 side. Push out toward the collet chuck 22 of.

At this time, the pressure fluid is supplied to the open side port of the first open / close cylinder mechanism (not shown), and the first loader holding member 60 of the first loader chuck means 6 is radially outward by the first open / close cylinder mechanism. As a result, the first collet chuck 22 is opened and the holding and holding of the workpiece P is released. Further, a pressure fluid is supplied to the extension side port of the extrusion cylinder mechanism 72, and the output portion 74 of the extrusion cylinder mechanism 72 expands, whereby the extrusion member 70 is advanced in the direction indicated by the arrow 80.

When the extruded member 70 is advanced in this way, the V-shaped inclined groove 71 of the protruding working portion 69 of the extruded member 70 acts on the lower part of the cylindrical portion 82 of the workpiece P and faces the collet chuck 22 forward. The rectangular portion 84 of the extruded workpiece P is inserted into the chuck receiving portion 86 of the collet chuck 22, and the surface of the inserted rectangular portion 84 (the other end surface of the workpiece P) is in the middle of the stopper member 90. By abutting against the stopper surface of the portion 92 and abutting in this way, further insertion of the collet chuck 22 of the workpiece P into the chuck receiving portion 86 is prevented.

At this time, as can be understood from FIGS. 5 (b) and 6 (a), the V-shaped inclined groove 71 of the extrusion member 70 extends downward with an inclination toward the front (in this embodiment, the V-shaped inclined groove 71 extends downward. As shown in FIGS. 5A and 5B, the groove depth is configured to be deeper toward the front side), so that as the extrusion member 70 advances, the protrusion action portion 69 has a V shape. The inclined groove 71 acts to push up the cylindrical portion 82 of the workpiece P diagonally upward. Therefore, when the extruded member 70 is advanced and the workpiece P is inserted into the chuck receiving portion 86 of the collet chuck 22 as required, the upper surface of the rectangular portion 84 is a collet as shown in FIG. 6A. The pair of upper spindle chuck holding portions 26a and 26b of the chuck 22 abut on the inner upper surface of the right-angle receiving portions 88a and 88b, whereby the rectangular portion 84 of the workpiece P is positioned in the vertical direction with respect to the collet chuck 22. And is accurately positioned at this insertion position.

Then, with the extrusion member 70 advanced, as shown in FIG. 6B, the spindle chuck means 10 (collet chuck 22) is moved in the direction indicated by the arrow 96 to some extent (for example, about 15 to 30 degrees). Rotate. In this way, the collet chuck 22 has an arrow relative to the workpiece P in a state where the V-shaped inclined groove 71 of the extrusion member 70 pushes up the cylindrical portion 82 of the workpiece P diagonally upward. It will be rotated in the direction indicated by 96. Then, a force is applied to the rectangular portion 84 of the workpiece P against the diagonal portion on the side of the chuck receiving portion 86 of the collet chuck 22, that is, the pair of spindle chuck holding portions 26a and 26c located diagonally. The left side surface of the rectangular portion 84 acts on the inner left surface of the right-angled receiving portion 88a of the spindle chuck holding portion 26a on the left side of the collet chuck 22, and the right surface of the rectangular portion 84 is the spindle chuck holding portion on the right side thereof. The rectangular portion 84 of the workpiece P is positioned in the horizontal direction in addition to the vertical positioning with respect to the collet chuck 22 so as to come into contact with the inner right surface of the right-angled receiving portion 88c of the 26c. The workpiece P is accurately positioned at a predetermined insertion position.

After that, the collet chuck 22 is closed, the rectangular portion 84 of the workpiece P is sandwiched and held by the four spindle chuck holding portions 26, and then the extrusion member 70 is retracted, and thus the workpiece P is retracted. Can be delivered from the first loader chuck means 6 on the loader device 2 side to the spindle chuck means 10 (collet chuck 22) on the processing device 4 side.

When the sleeve member 32 moves to the rear side (left side in FIG. 1), the collet chuck 22 is moved to the rear side via the connecting sleeve 34, and the outer tapered portion 28 of the collet chuck 22 becomes the inner tapered portion 30 of the auxiliary flange member 18. Is pressed against. Then, the spindle chuck holding portion 26 of the collet chuck 22 is elastically deformed inward in the radial direction to hold and hold the rectangular portion 84 of the workpiece P. Further, when the pressure fluid is supplied to the contraction side port of the extrusion cylinder mechanism 72, the output portion 74 of the extrusion cylinder mechanism 72 contracts, whereby the extrusion member 70 retracts in the direction indicated by the arrow 78 (FIG. FIG. 5 (a)).

In this embodiment, the upper surface of the rectangular portion 84 of the workpiece P is applied to the inner upper surface of the chuck receiving portion 86 of the collet chuck 22 (the inner upper surface of the right angle receiving portions 88a and 88b of the pair of spindle chuck holding portions 26a and 26b). After that, the upper left side surface and the lower right side surface of the rectangular portion 84 are brought into contact with each other on the inner upper left surface and the inner right lower surface of the chuck receiving portion 86 (the inner left surface of the right angle receiving portions 88a and 88c of the pair of spindle chuck holding portions 26a and 26c) and the inner left surface. Since the collet chuck 22 (spindle chuck means 10) is closed in such a state, the rectangular portion 84 of the workpiece P is chuck-held with high accuracy. As a result, it becomes possible to perform machining on the workpiece P by the machining apparatus 4 with high accuracy.

Although one embodiment of the loader device (chucking method for workpieces) according to the present invention has been described above, the present invention is not limited to such an embodiment, and various modifications are made without departing from the scope of the present invention. It can be modified.

For example, in the above-described embodiment, the inclined extrusion portion of the extrusion means 67 is composed of a V-shaped inclined groove 71, but is not limited to such a V-shaped inclined groove 71, and is not limited to such a V-shaped inclined groove 71. It can also be composed of an inclined surface or the like that acts on the cylindrical portion 82).

Further, for example, in the above-described embodiment, the inclined extrusion portion (for example, the V-shaped inclined portion 71) of the extrusion means 67 is inclined diagonally downward toward the front, but on the contrary, it is directed toward the front. It may be tilted diagonally upward.

In this case, when the inclined pressing portion of the extrusion means 67 advances and acts on the cylindrical portion 82 of the workpiece P, the inclined extrusion portion acts to push down the cylindrical portion 82 of the workpiece P diagonally downward. Therefore, when the workpiece P is inserted into the chuck receiving portion 86 of the collet chuck 22 as required, the lower surface of the rectangular portion 84 is at right angles to the pair of lower spindle chuck holding portions 26c and 26d of the collet chuck 22. It comes into contact with the inner lower surface of the receiving portions 88c and 88d. Further, when the spindle chuck means 10 (collet chuck 22) is slightly rotated in a predetermined direction from this contact state, the inclined extrusion portion (V-shaped inclined groove 71) of the extrusion member 70 becomes a cylindrical portion of the workpiece P. Since the 82 is rotated in a state of being pushed down diagonally downward, even in this case, the rectangular portion 84 of the workpiece P and the diagonal portion on the lateral side of the chuck receiving portion 86 of the collet chuck 22, that is, the pair. A pressing force acts on the pair of spindle chuck holding portions 26a and 26c located at the corners, and the left side surface of the rectangular portion 84 is on the inner left surface of the right angle receiving portion 88a of the spindle chuck holding portion 26a on the left side of the collet chuck 22. Further, the right side surface of the rectangular portion 84 comes into contact with the inner right surface of the right angle receiving portion 88c of the spindle chuck holding portion 26c on the right side thereof, and even in this way, the rectangular portion 84 of the workpiece P is formed. Vertical positioning and lateral positioning with respect to the collet chuck 22 are performed, and the workpiece P can be accurately positioned at a predetermined insertion position, and as a result, the workpiece P is chucked with high accuracy by the collet chuck 22. Can be retained.

Further, for example, in the above-described embodiment, the extrusion means 67 is provided in connection with the first loader chuck means 6 of the loader holding unit 42, but instead of the first loader chuck means 6, the second loader chuck means 8 is provided. The extrusion means 67 may be provided in connection with the above. In this case, the workpiece P is delivered to the spindle chuck means 10 (for example, the collet chuck 22) on the processing apparatus 4 side by using the second loader chuck means 8. Further, instead of these, the extrusion means 67 may be provided in relation to both the first and second loader chuck means 6 and 8, and in this case, the delivery of the workpiece P may be carried out by the first and second loaders. Either of the chuck means 6 and 8 can be used.

Further, for example, in the above-described embodiment, the loader holding unit 42 is provided with two loader chuck means (that is, the first and second loader chuck means 6 and 8), but the loader holding unit 42 is limited to such a form. Instead, one loader chuck means may be provided in the loader holding unit 42, and the workpiece P may be delivered to the spindle chuck means 10 of the machining apparatus by the loader chuck means. Can be similarly applied to such a loader device.

Further, for example, in the above-described embodiment, as shown in FIG. 6B, the spindle chuck means 10 (collet chuck 22) is rotated somewhat in the direction indicated by the arrow 96 (clockwise in FIG. 6B). However, it may be rotated counterclockwise in FIG. 6 (b) in the opposite direction to this direction. In this case, with the V-shaped inclined groove 71 of the extrusion member 70 pushing up the cylindrical portion 82 of the workpiece P diagonally upward, the collet chuck 22 is relative to the workpiece P in FIG. 6 ( In b), it is rotated counterclockwise, and the rectangular portion 84 of the workpiece P has a diagonal portion on the lateral side of the chuck receiving portion 86 of the collet chuck 22, that is, a pair of spindle chuck holding portions located diagonally. A pressing force acts on the 26b and 26d sides, and the right side surface of the rectangular portion 84 is on the inner right surface of the right-angled receiving portion 88b of the spindle chuck holding portion 26b on the right side of the collet chuck 22, and the left side surface of the rectangular portion 84. Comes into contact with the inner left surface of the right-angled receiving portion 88d of the spindle chuck holding portion 26d on the left side thereof.

2 Loader device 4 Processing device 6,8 Loader chuck means 10 Spindle chuck means 14 Spindle 22 Collet chuck 26, 26a to 26d Spindle chuck holding member 42 Loader holding unit 44 Unit body 60, 62 Loader holding member 67 Extruding means 68 Plate-shaped body Part 69 Protruding part 70 Extruding member 71 V-shaped inclined groove 82 Cylindrical part 84 Rectangular part 86 Chuck receiving part 88, 88a to 88d Right angle receiving part 90 Stopper member P Work piece

Claims (5)

The loader holding unit includes a loader holding unit that is moved by a loader moving mechanism, and the loader holding unit is a loader device provided with first and second loader chuck means for holding the workpiece.
The first loader chuck means includes a plurality of first loader holding members mounted so as to be openable and closable, and is attached to the first mounting portion of the loader holding unit, and the second loader chuck means is openable and closable. It is provided with a plurality of second loader holding members mounted on the loader holding unit, and is mounted on the second mounting portion of the loader holding unit.
Further, in connection with either one or both of the first and second loader chuck means, an extrusion means for extruding the workpiece forward is provided, and the extrusion means obliquely upwards or diagonally upwards the workpiece. A loader device characterized by having an inclined extrusion portion that is extruded diagonally downward. One end side of the work piece has a cylindrical portion having a cylindrical outer shape, and holds the plurality of first loader holding members of the first loader chuck means and the plurality of second loader holding members of the second loader chuck means. The member is configured to chuck and hold the cylindrical portion of the work piece, the extruding means includes an extruding member that extrudes the work piece forward, and the inclined extruding part of the extruding means is said. It is composed of a V-shaped inclined groove provided in the extrusion member, the V-shaped inclined groove extends diagonally downward or diagonally upward toward the front, and the V-shaped inclined groove is the cylindrical portion of the work piece. The loader device according to claim 1, wherein the loader device acts on. The other end side of the workpiece has a rectangular portion having a rectangular outer shape, and the rectangular portion of the workpiece is configured to be chucked by the spindle chuck means. It has four spindle chuck holding portions arranged at intervals in the direction, and the four spindle chuck holding portions are configured to chuck the four corner portions of the rectangular portion of the workpiece. The V-shaped inclined groove of the extruded member acts on the work piece and pushes it diagonally upward or diagonally downward toward the front, whereby the rectangular portion of the work piece is pushed out toward the front side. The loader device according to claim 2, wherein the loader device is pressed against the pair of spindle chuck holding portions on the upper side or the pair of spindle chuck portions on the lower side of the spindle chuck means. In the chucking method of a work piece, in which the work piece is delivered from the loader device that conveys the work piece to the spindle chuck means of the work piece.
The loader device includes a loader holding unit that is moved by a loader moving mechanism, and the loader holding unit includes a loader chuck means for holding a cylindrical portion on one end side of the workpiece and a loader chuck means for holding the workpiece on the front side. The extruding means includes an extruding means for extruding the work piece obliquely upward or diagonally downward.
The spindle chuck means of the processing apparatus has four spindle chuck holding portions arranged at intervals in the circumferential direction, and the four spindle chuck holding portions have a rectangular shape on the other end side of the workpiece. It is configured to hold the four corners of the part,
When the workpiece is delivered from the loader chuck means of the loader device to the spindle chuck means of the processing apparatus, the loader chuck means holding the workpiece is positioned at a position facing the spindle chuck means, and then. As the loader chuck means is opened, the extrusion means is moved to the front side, whereby the workpiece held by the loader chuck means is pushed out diagonally upward or diagonally downward toward the front side. Then, the spindle chuck means is pressed against the pair of upper spindle chuck holding portions or the lower pair of spindle chuck holding portions of the spindle chuck means in the open state, and then the spindle chuck means is rotated somewhat in a predetermined direction, whereby the spindle chuck means is rotated somewhat in a predetermined direction. The workpiece is pressed against the pair of spindle chuck holding portions on the lateral side of the spindle chuck means in a state of being positioned on the pair of spindle chuck holding portions on the upper side or the pair of spindle chuck holding portions on the lower side, and then pressed against the pair of spindle chuck holding portions on the lateral side of the spindle chuck means. A method for chucking a workpiece, wherein the spindle chuck means is closed and the four chuck holding portions chuck the rectangular portion of the workpiece. The extrusion means includes an extrusion member that extrudes the work piece to the front side, and the inclined extrusion portion of the extrusion means is composed of a V-shaped inclined groove provided in the extrusion member, and the V-shaped inclination is formed. The chucking method for a workpiece according to claim 4, wherein the groove extends diagonally downward or diagonally upward toward the front, and the V-shaped inclined groove acts on the cylindrical portion of the workpiece. ..

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