WO1991015332A1

WO1991015332A1 - Automatic work feeder of machine tool

Info

Publication number: WO1991015332A1
Application number: PCT/JP1990/000458
Authority: WO
Inventors: Yoji Ise
Original assignee: Myotoku Ltd.
Priority date: 1990-04-04
Filing date: 1990-04-04
Publication date: 1991-10-17
Also published as: KR920700843A; DE4092552T1

Abstract

An automatic work feeder of a machine tool, useful for drilling and other machine tools and suitable for feeding especially a small work having directivity. By the use of a pallet (24) having multiple aligning holes (24') that align works (3) piece by piece, the works can be aligned simply and efficiently and, after being transported together with the pallet (24) and gripped by a gripping device (7) piece by piece from the inside of the aligning holes (24'), the works (3) are transferred onto the work table (1') of a machine tool (1) by a transfer device. Thus they can be automatically fed efficiently without damage to the directivity.

Description

Statement

Automatic workpiece supply equipment for machine tools

The present invention relates to an automatic workpiece supply apparatus for a machine tool, and more particularly, to an automatic supply apparatus that can be automatically supplied to a machine tool without impairing the directionality of a small and directional workpiece. They are trying to provide equipment. Background art

2. Description of the Related Art Conventionally, there has been known a chuck for a machine tool which can supply a workpiece to a work table of a machine tool in a state where the workpiece is held dry.

Further, a conveyer for feeding a workpiece to the vicinity of the machine tool 梂 is also known.

However, if the workpiece has directionality, it is necessary to supply the workpiece to the machining table after aligning the orientation of the workpiece. For this reason, before transporting by the conveyor, the direction of the workpiece should be adjusted with respect to the transport direction of the conveyor, or after transport by the conveyor ignoring the direction of the workpiece. While transferring the workpiece from the conveyor to the processing table of the machine tool 梂, it is also possible to supply the workpiece to the processing table of the machine tool while adjusting its direction while holding it with a chuck. .

However, even if the direction of the workpiece is adjusted before being transported by the conveyor, if the workpiece is a small part, The fact that the workpieces with uniform orientation are supplied one by one on the conveyor has the disadvantage of poor work efficiency.

Also, if the workpiece is fed by a conveyor ignoring the directionality of the workpiece, it is difficult to grip the workpiece on the conveyor by the chuck.

Therefore, according to the present invention, by using a pallet having a plurality of alignment holes for aligning the workpieces one by one, not only can the directionality of the workpieces be efficiently and reliably aligned, but also the orientation of the workpieces can be improved. Workpieces are transported by simulated feeder along with the pallets, and the workpieces are gripped by the gripper one by one from the alignment holes of the transported pallets. The purpose of the present invention is to provide an automatic workpiece supply device for a machine tool that can efficiently and automatically supply the workpiece to the machine tool without impairing the directionality of the workpiece by being transferred to the workpiece. I have.

Another object of the present invention is to provide, as the above-mentioned machine tool 梂, an automatic supply device for a workpiece which is suitable for a drilling machine.

Further, the present invention provides a processing machine for wiping a machine tool capable of reliably and efficiently transporting a workpiece aligned in an alignment hole of a pallet by using a chain conveyor as the above-described transport apparatus. The purpose is to provide an automatic supply system for goods.

Further, according to the present invention, the above-mentioned gripping device is gripped by pressing the workpiece against one surface of the workpiece in the alignment hole of the pallet and pressing the workpiece toward the contact surface. It is composed of a pair of Ap pressure members, a driving source for pressing the rain pressing member, and a lifting device that raises the workpiece gripped by the contact surface and the rain pressing member from the alignment holes of the pallet. thing Accordingly, an object of the present invention is to provide an automatic workpiece supply device for pulling out a machine tool, which can securely and efficiently grip the workpiece from within the alignment holes' of the pallet.

In addition, the present invention provides a processing machine for a machine tool having a high tolerance of a transfer range of a workpiece by configuring the above-mentioned transporting device so that the gripping device can be transported in the X-Y axis directions. It aims to provide an automatic supply system for goods.

Further, according to the present invention, the above-mentioned transfer device is attached to a pallet extending substantially along the direction in which the pallet is transported by the transport device, and movably mounted along the direction of the length of the horizontal rod. A gun rod that is substantially perpendicular to the transport direction, a mounting member that is mounted movably along the length of the vertical rod and supports the gripping device, and a vertical that moves the vertical rod relative to the horizontal rod. By using a rod-moving drive source and an attachment-member-moving moving source that moves the attachment member with respect to the vertical rod, the tolerance of the workpiece transfer range is high, and the workpiece is efficiently used. It is an object of the present invention to provide an apparatus for automatically supplying a workpiece for a machine tool, which can be transferred well.

Further, if the workpiece is directly transferred onto the processing table of the machine tool により by the transfer device, the processing accuracy of the machine tool may be affected by the transfer accuracy of the transfer device.

Therefore, the present invention further provides a holding frame on which a workpiece is placed on a processing table of a machine tool, which is horizontally moved between the processing position of the machine tool and the transfer position of the workpiece transferred by the transfer device. After being movably mounted, the holding frame is urged toward the transfer position by the resilient force of the spring, and after the workpiece is placed on the holding frame at the transfer position by the transfer device, To provide an automatic workpiece supply device for a machine tool capable of performing high-precision machining regardless of the transfer accuracy of the transfer device by moving the holding frame to a processing position by the transfer device. It is an object. Disclosure of the invention

The present invention provides a workpiece, a pallet having a plurality of alignment holes for aligning the workpiece one by one, a machine tool for processing the workpiece one by one on a worktable, and a machine tool. A transport device that transports a pallet in which the workpieces are aligned in the alignment holes toward と, and a gripping device that grips the workpieces in the alignment holes of the pallet transported by the transport device one by one. And a transfer device for transferring the gripping device from the pallet feeding position to the working table of the machine tool.

Therefore, the use of a pallet can efficiently and reliably match the directionality of the workpiece. In addition, the workpiece is simulated by the feeding device together with the pallet, and the workpiece is gripped by the gripping device one by one from each of the aligned holes of the pallet that has been fed in by the gripping device. By transferring the workpiece to the machining table, the workpiece can be efficiently and automatically supplied to the machine tool without affecting the direction of the workpiece.

In the present invention, a drilling machine is used as the machine tool. For this reason, it is possible to provide an automatic workpiece supply apparatus suitable for a drilling machine.

Further, in the present invention, a chain conveyor is used as the pseudo transmission device.

For this reason, the workpieces aligned with the alignment holes Sending can be performed reliably and efficiently.

Further, according to the present invention, the above-mentioned gripping device is gripped by pressing the workpiece against one surface of the workpiece in the alignment hole of the pallet and pressing the workpiece toward the contact surface. It comprises a pair of pressing members, a pressing drive source for pressing the rain pressing member, and an elevating device for raising the workpiece gripped by the contact surface and the rain pressing member from the alignment holes of the pallet. ing. As a result, the workpiece can be gripped by being pressed against the contact surface by the pair of pressing members, so that the workpiece can be gripped reliably and efficiently.

Further, the present invention is configured such that the above-described transfer device can transfer the gripping device in the X-Y axis directions.

For this reason, the gripping position and the transfer position of the workpiece can be freely set at any positions on the X-Y axes of the transfer device, so that the transfer position can be set by the transfer device or the machine tool 梂. It is possible to easily set and change the processing position of the workpiece.

Further, according to the present invention, the above-mentioned transfer device is attached to a pallet extending substantially along the direction in which the pallet is transported by the transport device, and movably mounted along the direction of the length of the horizontal rod. A vertical rod substantially perpendicular to the transport direction; a mounting member movably mounted along the length of the vertical rod to support the gripping device; and a vertical rod for moving the vertical rod relative to the horizontal rod. It comprises a rod moving drive source and a mounting member moving drive source for moving the mounting member with respect to the vertical rod.

Therefore, not only can the workpiece be efficiently transported in the pallet transport direction by the transport device, but also the gripping position and the transport position of the workpiece can be determined by the length of the horizontal and vertical rods of the transport device. Freely along the direction of Therefore, it is easy to set the transfer position by the transfer device and to set or change the processing position of the workpiece by the machine tool II.

Further, according to the present invention, a holding frame for placing a workpiece on the machining table of the machine tool is provided between the machining position of the machine tool and the transfer position of the workpiece transferred by the transfer device. After being mounted horizontally, the holding frame is urged toward the transfer position by the resilient force of the spring, and the workpiece is placed on the holding frame at the transfer position by the transfer device. The frame is moved by the transfer device to reach the processing position.

Therefore, the workpiece can be accurately and reliably moved to the processing position. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view showing a preferred automatic supply device according to the present invention, FIG. 2 is a plan view schematically showing FIG. 1, and FIG. 3 is a side view showing a preferred transfer device according to the present invention Fig. 4 is a plan view schematically showing a preferred gripping device according to the present invention, Fig. 5 is a side view of Fig. 4, and Fig. 6 is a working table of a preferred machine tool に according to the present invention. FIG. 7 is a side view of FIG. 6, and FIG. 8 is another side view of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a side view showing a preferred automatic feeder according to the present invention, FIG. 2 is a plan view schematically showing FIG. 1, and in the rainy diagram, 1 is a machine tool 梂. A drilling machine is shown, and a drilling machine 1 has a total of two drilling machines at each upper end of two pillars 10 and 10 erected on a base 2 placed on the floor as shown in Figs. It is attached. In the middle of the height of each column 10, as shown in FIG. 1, a processing table 11 on which the workpiece 3 is placed is supported, and above each processing table 11, each ball is placed. Drill 42 of panel 1 is facing each.

The workpiece 3 is a relatively small mechanical component or electronic component that requires drilling with, for example, a drill 42, and forms a rectangular parallelepiped as shown in FIGS. The three sides have different lengths and have directionality.

Further, in the figure, 24 is a pallet having a plurality of alignment holes 2 4 ⁷ ... for each one Dzu' align the workpiece 3 on the upper surface of the pallet 24, as shown in FIG. 2, left and right Eight alignment holes 24 'are provided in two rows and four rows before and after. As shown in FIG. 1, each alignment hole 24 ′ has a concave cross-section opened on the upper surface of the pallet 24, has a size in which the lower half of the workpiece 3 fits, and the depth thereof is It is set to about 1/2 of the thickness of object 3.

In order to align the workpieces 3 in the respective alignment holes 24 ′ of the pallet 24, although not shown, after supplying a plurality of workpieces 3 to the upper surface of the pallet 24, the pallet 24 is finely arranged in the vertical or vertical direction. Vibration. When a vibration is applied to the pallet 24, the workpiece 3 fits into the alignment hole 24 'opened on the upper surface of the pallet 24 by one value. Then, after the workpiece 3 is fitted into all the alignment holes 24 'of the pallet 24, By inclining the cut 24, the excess workpiece 3 that has not been stuck in the alignment hole 24 ′ is dropped from the upper surface of the pallet 24.

Thus, a pallet 24 in which the workpiece 3 is aligned in each alignment hole 24 'is obtained.

When the workpiece 3 is aligned with each of the alignment holes 24 ', three sides of different lengths of the workpiece 3 are aligned in the same direction as shown in FIGS.

Then, the aligned pallets 24 of the workpiece 3 are transported by the transport device 15 disposed on the base 2 as shown in FIG.

FIG. 3 is a side view schematically showing a preferred transport device 15 according to the present invention, in which the workpiece 3 is transported together with the pallet 24 using a chain conveyor.

More specifically, as shown in FIG. 1, the transfer device 15 includes a box-shaped base 16 fixed on the base 2, and is axially fixed on the base 16 so as to be separated in the left-right direction, and As shown in FIG. 3, a pair of left and right sprockets 18 and 20 arranged alternately in the front and rear, and two chains 17 and 19 wrapped around the rain sprockets 18 and 20 endlessly, respectively. It is supported at substantially constant intervals over the rain chains 17 and 19, and is composed of a plurality of feed stands 21 on each upper surface of which a pallet 24 can be placed.

As shown in FIG. 3, the feed base 21 is provided with a pair of catching pawls 22 and 23 vertically suspended from the lower surface thereof, and the rain catching pawls 22 and 23 are respectively attached to the chains 17 and 19.柜 has been stopped.

That is, one mounting claw 22 is located in front of the lower surface of the feed bar 21 with respect to the traveling direction of the rain chains 17 and 19, and as shown in FIG. The chain 17 is provided corresponding to the running position of the chain 17 laid over the sprocket 18 located on the left side of the vehicle, and is pivoted to the chain 17. On the other hand, the other mounting claw 23 is located behind the lower surface of the feed bar 21 with respect to the traveling direction of the rain chains 17 and 19, and extends over the sprocket 20 located in the right lavatory in FIG. The chain 19 is provided corresponding to the running position of the chain 19, and is pivoted to the chain 19.

Therefore, when one of the rain sprockets 18, 20 or the rain side is rotated counterclockwise in FIG. 3 by an active source such as a motor (not shown), the feed chain 21 circulates upward from below by the rain chains 17, 19. Moving. At this time, since the rain mounting claws 22 and 23 hanging from the lower surface of the feed base 21 are fixed to the respective chains 17 and 19, the upper surface of the feed base 21 is always fixed as shown in FIG. Circulates and moves upward. For this reason, with the lower surface of the pallet 24 placed on the upper surface of the feed plate 21, the pallet 24 can be fed upward from below in the entire length of the rain chains 17, 19, so that the rain chains 17, 19 The full length can be used effectively.

Then, at the transport position where the aligned pallets 24 of the workpiece 3 have been transported upward, as shown in FIG. 1, the center line before and after the transport direction of the pallets 24 and the The center line of the drill 42 of the drilling machine 1 located on the front side is almost aligned with the center line.

In the above-mentioned feeding position, each of the workpieces 3 in the alignment holes 24 ′ of the pallet 24 is gripped one by one by the gripping device 7. The gripping device 7 is configured such that, while the workpiece 3 is gripped, the transfer device supported on the base 2 moves the processing table of each drill press 1 from the transfer position of the pallet 24. Top 1 transferred to 1.

First, the transfer device will be described with reference to FIGS. 1 and 2. As shown in FIG. 2, this transfer device grips the pallet 24 in the XY direction with the transport direction of the pallet 24 as the X axis. The device 7 can be transported. More specifically, as shown in FIGS. 1 and 2, the transfer device includes a rod 4 extending substantially along the transport direction of the pallet 24 by the contacting device 15, and a horizontal rod 4. The pallet 24 is mounted so as to be movable along the length direction thereof, and is attached so as to be movable along the length direction of the vertical rod 5 perpendicular to the transport direction of the pallet 24. A mounting member 8 for supporting the holding device 7, a pulse motor 6 as a driving source for moving the vertical rod 5 relative to the vertical rod 4, and an attaching member for moving the mounting member 8 relative to the vertical rod 5. And a pulse motor 9 as a driving source for movement.

As shown in FIGS. 1 and 2, the horizontal rod 4 is disposed on the opposite side of the rain drilling machine 1 with the transport device 15 interposed therebetween. The above-described pulse motor 6 is attached to an end of the lateral rod 4 located on the front side with respect to the transport direction of the pallet 24. By rotating the pulse motor 6 forward and backward, the longitudinal The rod 5 is reciprocated in the longitudinal direction of the horizontal rod 4.

As shown in FIGS. 1 and 2, one end of the rod 4 is movably attached to the vertical rod 5, and the other end of the rod 4 traverses the transport device 15 and drills the ball machine 1. It extends toward 42. As shown in FIG. 1, a bearing 12 penetrating in a direction perpendicular to the longitudinal direction of the horizontal rod 4 is provided at the other end of the horizontal rod 4. The guide rail 11 extends in parallel with the rod 4 across the. As shown in Figs. 1 and 2, the guide rail 11 has its rain end on the base 2. 1 At one end of the horizontal rod 4 fixed to each upper end of a pair of standing stands 13 and 14 _c , as shown in FIGS. By rotating the pulse motor 9 forward and backward, the mounting member 8 supporting the gripping device 7 is reciprocated in the longitudinal direction of the vertical rod 5.

Next, the gripping device 7 will be described with reference to FIGS. 4 and 5. FIG. 4 is a plan view schematically showing a preferred gripping device 7 according to the present invention, and FIG. It is each showing a side view.

As shown in FIGS. 4 and 5, the gripping device 7 has, as shown in FIGS. 4 and 5, a contact surface 36 that contacts one surface of the workpiece 3 in the alignment hole 24 ′ of the pallet 24, and a contact surface 3 A pair of pressing members 37, 37 for pressing and gripping the workpiece 3 toward 6, and a pressing cylinder 41, 4 as a pressing drive source for pressing the rain pressing member 37. 1 and an ascending and descending cylinder 28 as an elevating device for elevating the workpiece 3 gripped by the contact surface 36 and the rain pressing member 37 from the alignment hole 24 'of the pallet 24. Is done.

More specifically, as shown in FIGS. 1 and 5, an inverted L-shaped mounting plate 25 is fixed to the mounting member 8, and the mounting plate 25 is attached to the mounting member 25 as shown in FIG. A guide 26 extending vertically is further fixed, and a base 27 of the gripping device 7 is attached to the guide 26 so as to be able to move up and down. As shown in FIGS. 1, 4, and 5, the lifting plate 28 is fixed to the mounting plate 25 alongside the base 27 of the gripping device 7 and the lifting cylinder 28.

As shown in FIGS. 1 and 4, the rod (not shown) of the lifting cylinder 28 has a bracket extending toward the base 27 of the gripping device 7. The racket 29 is further provided with a bearing 30 as shown in FIG. Therefore, the bearing 30 is moved up and down integrally with the rod (not shown) of the cylinder 28.

On the other hand, as shown in FIGS. 4 and 5, on the side of the base body 27 of the gripping device 7, it is difficult to move up and down, and the bracket 29 and the apple 29 move toward the lifting cylinder 28. A pair of extended upper and lower stoppers 31 and 32 are fixed, and a vertically extending guide rod 33 is fixed between the rain stoppers 31 and 32.

As shown in FIGS. 1 and 5, the bearing 30 of the bracket 29 is passed through a guide rod 33 so that the bearing 30 can be moved up and down between upper and lower stoppers 31 and 32. I do. As shown in FIGS. 1 and 5, a spring 34 is inserted into the guide rod 33 in a compressed state between a bearing 30 and a stopper 32 located below. Due to the compression restoring force, the bearing 30 is urged toward the stopper 31 located above.

Therefore, when the rod (not shown) of the cylinder 28 is in a shortened state, that is, when the rod is raised, the bearing 30 is compressed by the compression restoring force of the spring 34 as shown in FIG. The base 27 of the gripping device 7 is at the position where the base 27 of the gripping device 7 is at the position where the base member 27 of the gripping device 7 is at the position where the base 27 of the gripping device 7 is lifted upward through the bearing 30.

On the other hand, when the rod (not shown) of the cylinder 28 extends, that is, descends, the bearing 30 also descends integrally, and the base 27 descends via the rain stoppers 31, 32. I do.

Further, when the lower surface of the base 27 or the like abuts on the upper surface of the pallet 24 during descent or the like, the descent of the base 27 stops at that position. On the other hand, the bearing 30 is integrated with a rod (not shown) of the cylinder 28 at a predetermined position. Descend to At this time, the spring 34 is compressed between the bearing 30 and the stopper 32 located below. For this reason, the buffering action of the spring 34 works, and not only can the processing position of the base 27 be easily set, but also the lower surface of the base 27 can be brought into close contact with the upper surface of the pallet 24. As shown in FIGS. 4 and 5, a pair of left and right arms 35 and 35 protruding forward in the direction of conveyance by the feeding device 15 is attached to the base 27 so as to be openable and closable. Although not shown, the rain arms 35, 35 are opened and closed by a cylinder, a cam, a tooth link, a screw, or other appropriate opening / closing means.

When the work 3 is clamped between the rain arms 35 and 35, one side of the work 3 in the alignment hole 24 of the pallet 24, here the rear of the work 3 The contact surfaces 36, 36 which contact each other are provided. Also, as shown in FIGS. 3 and 4, a pair of pressing members for pressing and gripping the workpiece 3 toward the respective contact surfaces 36 are provided at the respective distal ends of the arms 35, 35.

37 and 37 are fixed to the shaft respectively.

More specifically, as shown in FIG. 4, each pressing member 37 has a shaft portion 39 at an intermediate portion thereof, which is axially fixed to a distal end portion of each arm 35, and each of the distal end portions 3 Numerals 8 are configured to face the respective contact surfaces 36 and to respectively contact the front surface of the workpiece 3. Also, the rear end of each pressing member 3 7

40 is bent in a crank shape and extends upward and backward, and is connected to the rod of the pressing cylinder 41 fixed to each arm 35.

Therefore, when the rain pressing cylinder 41 is operated, each rod is extended, and each pressing member 37 rotates around the shaft 39 in the direction indicated by the arrow in FIG. In front of the workpiece 3 by each tip 3 8 4 Press the surface against each contact surface 36.

Note that each pressing member 37 may be attached to each arm 35 so as to be able to move back and forth, and may be moved back and forth with respect to the contact surface 36. The pressing drive source for pressing the pressing member 37 is not limited to the cylinder 41, but may be a motor.

On the other hand, FIG. 6 is a plan view schematically showing a processing table 1 ′ of the drilling machine 1, FIG. 7 is a side view of FIG. 6, and FIG. 8 is another side view of FIG.

As shown in FIGS. 6 to 8, a holding frame 50 on which the workpiece 3 is placed is mounted on each of the processing tables 1 ′ of the both drilling machines 1, and a processing position below the drills 4 2 of the drilling machine 1 is transferred. The device is mounted so as to be movable between the transfer position of the workpiece 3 transferred by the device, and the holding frame 50 is urged toward the transfer position by the repulsive force of the springs 51, 52. After the workpiece 3 is placed on the holding frame 50 at the transfer position by the transfer device, the holding frame 50 is moved by the transfer device to reach the processing position. -More specifically, jigs 43 including the above-described holding frame 50 and springs 51, 52 are mounted on each processing table 1 'of the rain drilling machine 1.

As shown in FIGS. 6 to 8, the jig 43 is provided with a base 44 fixed on the processing table 1 ′ of the drilling machine 1 and a transfer direction by the transfer device 15 mounted on the base 44. And a sliding device 49 for horizontally moving the holding frame 5〇 in the X—Y axis direction with the X axis as the X axis.

As shown in FIGS. 6 to 8, the sliding device 49 is fixed on a base 44 and extends in parallel with the transport direction of the transport device 15, and a horizontal rail 45. Lower movable, slidably mounted on top A body 46, a vertical rail 47 fixed on the lower movable body 46 and extending parallel to the vertical rod 5 of the transfer device, and an upper part slidably mounted on the vertical rail 47. The movable body 48, the spring 51 that urges the lower movable body 46 along the 撗 rail 45 in a direction away from the processing position, and the upper movable body 48 that is processed along the vertical rail 47. And the spring 52 biased in a direction away from the position.

A hollow box-type cover 53 is placed over the outer lavage of the sliding device 49, and the cover 53 is fixed on the base 44. Further, on the upper surface of the holding frame 50, a substantially cross-shaped groove 54 is provided for removing facets or the like by blowing air or the like.

Note that the jig 43 of the processing table 1 ′ of the rain drilling machine 1 may be configured exactly the same, or the moving amount of the rain movable bodies 46, 48 may be changed so that the work 3 The drilling positions of the drills 42 can be made different from each other. By making the drilling positions of both drilling machines 1 different from each other, the workpiece 3 is transferred to the rain drilling machine 1 by the transfer device, and two holes (not shown) are provided at different positions of the workpiece 3. Can be perforated.

Next, the operation of the present invention will be described.

First, the pallet 24 with the workpieces 3 aligned in the respective alignment holes 24 'is placed on the upper surface of the feed base 21 of the transfer device 15 as shown in FIG. By rotating at least one of the sprockets 18 and 20, the pallet 24 placed on the feed base 21 is transported toward the rain drilling machine 1. Here, the pallet 24 is conveyed from the lower side of the conveying device 15 by turning around the rain sprockets 18 and 20, and as shown in FIG. Stop temporarily with the 盤 of drilling machine 1 located on the front side.

When the pallet 24 stops at the transport position in this way, the gripping device 7 is transferred by the transfer device immediately above one of the workpieces 3 stuck in the alignment holes 24. Next, the lifting cylinder 28 is operated to lower its rod (not shown), and the rain arms 35, 35 of the gripping device 7 are lowered toward the workpiece 3.

The rain arms 35, 35 are lowered in the open state, and after lowering, the work arms 3 are clamped by closing the rain arms 35, 35. When the workpiece 3 is held between the rain arms 35, 35, the rear faces of the workpiece 3 abut against the contact surfaces 36, 36 of the rain arms 35, 35, respectively.

After the rear surfaces of the workpiece 3 are brought into contact with the contact surfaces 36, 36 in this manner, both the pressing cylinders 41 are operated to extend the respective rods, and the respective pressing members 37 are connected to the respective shafts. Rotate around the part 39 in the direction shown by the arrow in FIG. 4 and press the front surface of the work piece 3 against each contact surface 36 with each tip 38 to hold it. Let it.

After the workpiece 3 is gripped by the gripping device 7, the lifting cylinder 28 is operated again to raise the rod (not shown) in the opposite direction, and the workpiece 3 is aligned with the pallet 24. Raise from hole 24 '.

Then, by driving the rain pulse motors 6 and 9 of the transfer device, the workpiece 3 gripped by the gripping device 7 is transferred onto the processing table 1 ′ of one drilling machine 1.

On the processing table 1 ′ of the pole board 1, a holding frame 50 stands by at a transfer position of the workpiece 3 by the transfer device. Then, the object 3 is positioned immediately above the holding frame 50 by the transfer device, and at this position, the lifting cylinder 28 is operated to lower the rod (not shown) again. The workpiece 3 held by the gripping device 7 is fitted into the holding frame 50.

After the workpiece 3 is inserted into the holding frame 50, the workpiece 3 is gripped by the gripping device 7, and the rain pulse motors 6 and 9 of the transfer device are driven. 50 through the rain movable body 46, 48 along the rain rails 45, 47, against the resilience of the rain springs 51, 52, drilling position of the drill 4 drill 4 2 Transfer to

Then, after drilling a predetermined position of the workpiece 3 with the drill 42, both the pulse motors 6 and 9 of the transfer device are driven to return the holding frame 5〇 to the transfer position. Then, after returning to the transfer position, the elevating cylinder 28 is operated to raise the rod (not shown), thereby raising the workpiece 3 from the holding frame 50.

After the work piece 3 is lifted from the holding frame 50, the rain pulse motors 6 and 9 of the transfer device are driven so that the work piece 3 is placed directly above the original alignment hole 24 'of the pallet 24. Transfer. After the transfer, the elevating cylinder 28 is operated to lower its rod (not shown), and the workpiece 3 is fitted into the alignment hole 24 'of the pallet 24. Thereafter, both the pressing cylinders 41 of the gripping device 7 are actuated to shorten each rod, and each pressing member 37 is centered on each shaft 39 and an arrow is added to FIG. By rotating in the opposite direction to the direction shown, the pressing of the workpiece 3 is stopped. Further, the work 3 is released by opening the rain arms 35, 35.

Then, the gripping device 7 is raised by the above-described procedure, and the remaining alignment holes

Workpieces 3 in 2 4 ′ are sequentially transferred to the bottom of drill 4 2 of drilling machine 1, and after drilling, they are returned to original alignment holes 24 ′.

Then, drill all the workpieces 3 in the alignment holes 24 'of the pallet 24. After the drilling operation is completed, at least one of the rain sprockets 18 and 20 is rotated to transport the processed pallet 24 by one of the feeders 2 1 and a new pallet 2 4 is temporarily stopped beside the drilling machine 1, and the processed pallets 24 are sequentially collected.

In this way, by using the pallet 24, the orientation of the workpiece 3 can be efficiently and reliably aligned. Further, the workpiece 3 is transported by the transport device 15 together with the pallet 24, and the workpiece 3 is held one by one from the alignment hole 24 ′ of the transported pallet 24, one by one. Then, the workpiece is transferred onto the working table 1 ′ of the drilling machine 1 by the transfer device, so that the workpiece 3 can be automatically and efficiently supplied to the drilling machine 1 without impairing the directionality.

The processing machine is not limited to the drilling machine 1, but may be a lathe or a polishing machine. Also, two drilling machines L are arranged on the base 2, but one or more drilling machines 1 may be arranged. Further, when a plurality of processing machines 配置 are arranged on the base 2, different types of processing machines よい may be arranged. For example, a drilling machine, a lathe, and a grinding machine may be arranged on the base 2 side by side.

On the other hand, the workpiece 3 is gripped by the pair of pressing members 37, 37 so as to be pressed toward the respective contact surfaces 36, 36 of the gripping device 7, so that the workpiece 3 is gripped. The workpiece 3 can be securely and efficiently gripped.

On the other hand, the workpiece 3 is horizontally moved to the machining position below the drill 42 of the drilling machine 1 while holding the workpiece 3 in the holding frame 5〇 on the machining table 1 ′ of the drilling machine 1. The workpiece 3 can be accurately and reliably moved to the processing position. Industrial applicability

As described above, the apparatus for automatically supplying a workpiece for a machine tool according to the present invention is useful for a drilling machine and other machine tools, and is particularly suitable for automatically supplying a small and directional workpiece. ing.

Claims

Scope

1. A workpiece, a pallet having a plurality of alignment holes for aligning the workpiece by one value each, a machine tool for processing the workpiece one by one on a processing table, and a machine tool. A conveying device that conveys the pallet in which the workpieces are aligned in the alignment holes toward the 梂; And a transfer device for transferring a gripping device from a pallet transfer position to a processing table of a machine tool, for automatically supplying a workpiece to a machine tool.

2. The apparatus according to claim 1, wherein the machine tool is a drilling machine.

3. The apparatus according to claim 1, wherein the feeding device is a chain conveyor.

4. The gripping device includes: a contact surface that contacts one surface of the workpiece in the alignment hole of the pallet; a pair of pressing members that press the workpiece toward the contact surface to hold the workpiece; 10. A pressing drive source for pressing the pressing member, and an elevating device for raising the workpiece to be gripped by the contact surface and the rain pressing member from the alignment holes of the pallet. 3. An automatic supply device for a workpiece of the machine tool 1 according to 1 to 3.

5. The apparatus according to claim 1, wherein the transfer device is configured to transfer the gripping device in the X-Y axis directions.

6. The transfer device is provided with a horizontal rod extending substantially in the direction of transport of the pallet by the transport device, and is mounted movably along the length of the horizontal rod and is substantially perpendicular to the pallet transport direction. Vertical rod An attachment member movably mounted along the length direction of the vertical rod, and supporting the gripping device; a vertical rod moving deer source for moving the vertical rod relative to the horizontal rod; 6. The apparatus for automatically supplying a workpiece to a machine tool according to claim 1, further comprising a drive source for moving an attachment member to be moved with respect to the rod.

7. On the worktable of the machine tool, a holding frame for placing the work is horizontally movable between the working position of the machine tool and the transfer position of the work to be transferred by the transfer device. At the same time, the holding frame is urged toward the transfer position by the elastic force of the spring, and the workpiece is placed on the holding frame at the transfer position by the transfer device. 7. The apparatus for automatically supplying a workpiece for a machine tool according to claim 1, wherein the frame is moved to reach a processing position by a transfer device.