JP3948380B2 - Work cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece cutting (removing) device, and more particularly to a workpiece cutting device that has a plurality of workpiece groups in which thin-walled workpieces are stacked and cuts workpieces one by one horizontally from the lower end of each workpiece group.
[0002]
[Prior art]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-9112
[Patent Document 2]
JP-A-6-82397
[Patent Document 3]
Japanese Patent Laid-Open No. 6-25583
[Patent Document 4]
JP-A-4-169417
[0003]
Conventionally, Japanese Patent Laid-Open No. 6-9112 discloses a method for positioning a thin sheet. In this case, after a thin sheet is adsorbed by a suction chuck having a smooth surface having a large number of suction holes, the thin sheet is moved and stopped in the frame body, and air is blown from the base to the thin sheet, and the suction chuck is used. The thin sheet suction is stopped or minute, and the edge of the thin sheet is applied to the frame to position the thin sheet.
In the conventional positioning method, a highly rigid workpiece is pressed against the workpiece as a reference (for example, the method disclosed in Japanese Patent Laid-Open No. 6-9112, however, the method disclosed in Japanese Patent Laid-Open No. 6-9112 is not positioning during workpiece transfer). In addition, for low-rigidity workpieces, image processing is generally used.
[0004]
[Problems to be solved by the invention]
Conventional positioning methods for thin workpieces have the following problems.
{Circle around (1)} Conventionally, there is no case in which the stacked thin workpieces are cut out one by one from the lower end of the stack and the cut workpieces are positioned at the same time.
In developing a device that cuts out and transports a workpiece from a thin-walled laminate of low rigidity and positions the workpiece during conveyance, it is necessary to solve the following problems.
(2) For thin-walled workpieces, it is easy to get caught during cutting or to cut out two sheets. Further, when the thin workpiece has a step in thickness, it is necessary that the thin portion of the step of the workpiece enters the gap between the fixed workpiece supply magazine and the movable cutting plate so as not to cause the lock.
(3) When a workpiece is cut out by dropping it into the cut-out hole of the cut-out plate, high-precision positioning is difficult. In any case, in order for the workpiece to enter the cutout hole, the size of the cutout hole must be larger than the external dimension of the workpiece, and the workpiece can be displaced within the cutout hole by the clearance, so that high-precision positioning is difficult. For example, even if the workpiece is positioned in one direction by moving the cutting plate in the workpiece cutting direction and placing the workpiece on the edge of the cutting hole, the workpiece is inserted between the workpiece and the positioning hole edge in the direction perpendicular to it. Clearance remains and positioning is not possible.
(4) When positioning the workpiece during conveyance after cutting, if the workpiece is clamped and pressed against the edge of the cutting hole, the workpiece will be warped and deformed due to the low rigidity of the workpiece. For example, the seal plate of the fuel cell is made of resin and is thin and has low rigidity. Therefore, from the workpiece supply magazine in which a plurality of stacked groups of workpieces having different shapes are arranged in parallel, one piece from the lower end of each stacked workpiece If the workpiece is dropped into the cut-out hole of the cut-out plate, the workpiece is positioned by contacting the edge of the cut-out hole during transfer, and moved to the transfer tip position, the workpiece will hit the cut-out hole edge strongly during positioning during transfer. There is a problem that it deforms and becomes a defective product before it is assembled to the fuel cell, and this must be solved.
[0005]
A first object of the present invention is to provide a workpiece cutting device that performs both cutting and positioning of a workpiece.
A second object of the present invention is to provide a workpiece cutting device that does not catch when cutting a thin-walled workpiece and does not generate two sheets.
A third object of the present invention is to provide a workpiece cutting device capable of positioning in two directions intersecting with each other, and thus capable of highly accurate positioning.
A fourth object of the present invention is to provide a workpiece cutting device that can suppress deformation of a workpiece even if the stiffness of the workpiece is low.
[0006]
[Means for Solving the Problems]
The present invention for achieving the above object is as follows.
(1) A workpiece cutting device having a plurality of workpiece groups in which thin-walled workpieces are stacked, and cutting out workpieces one by one from the lower end of each workpiece group,
A workpiece supply magazine having at least one group of workpieces in which thin-walled workpieces are stacked in the vertical direction;
It is movable in the horizontal direction with respect to the workpiece supply magazine, and has a cut-out hole having a predetermined clearance in the horizontal direction between the workpieces in the same shape as the workpieces of each workpiece group below each workpiece group, When the workpiece at the lower end of each workpiece group is dropped into the cut-out hole located below, the cut-out plate that holds the dropped workpiece in the workpiece cut-out hole and removes it horizontally from the stacked workpiece located above When,
A suction plate that is provided under the cut plate and whose upper surface is slidable with the lower surface of the cut plate;
Work cutting device equipped with.
(2) Cutout plate is thickness t₁Have
Thickness t between the lower surface of the workpiece supply magazine and the upper surface of the cutting plate in the vertical direction₂Space is provided,
The minimum thickness of workpieces in multiple workpiece groups is t_Three, Maximum thickness t_FourAnd when
t₁≦ t_Three,
t₁+ T₂≧ t_Four,
t₁+ T₂≦ 2t_Three
Set so that the workpiece does not get caught in the cut hole and the supply magazine when the cutting plate is moved in the horizontal direction, and two workpieces are not cut out simultaneously from each workpiece group. ) The workpiece cutting device described.
(3) Thickness t between the lower surface of the workpiece supply magazine and the upper surface of the cutting plate in the vertical direction₂Space is provided,
The workpiece of at least one of the plurality of workpiece groups is stepped and has the thinnest portion t._FiveHave
The work supply magazine has a depth t which is recessed upward so that the stepped portion of the work immediately above the work to be cut out can be stored on the lower surface of the portion for supplying the stepped work.₆Forming a recess,
t₂≦ t_Five,
t₆≧ t_Five
Even if the workpiece immediately above the cut workpiece is dragged by the cut workpiece when the workpiece is cut out, the stepped portion of the workpiece immediately above the cut workpiece is between the lower surface of the workpiece supply magazine and the upper surface of the cut plate. The workpiece cutting device according to (1) or (2), wherein the workpiece is not included in the interval.
(4) A workpiece cutting device for taking out workpieces one by one from the end of a workpiece group in which workpieces are stacked,
Workpiece supply means having at least one group of the workpiece groups in parallel;
Cutting means provided so as to be movable and holding the workpiece at the end of the workpiece group and taking it away from the workpiece group;
A suction means provided in the cutting means and holding the workpiece taken out by the cutting means;
The cutting means can be moved in a first direction by a first driving means, and can be moved in a second direction intersecting the first direction by a second driving means, and the cutting means holding a workpiece. The workpiece cutting device is characterized in that the workpiece is positioned in multiple directions.
(5) The workpiece cutting device according to (4), wherein the workpiece shape of at least one workpiece group is different from the workpiece shapes of the other workpiece groups, and workpieces having different shapes are simultaneously taken out.
(6) Move the cutting plate while holding the workpiece on the suction plate by suction, and when the workpiece is positioned by the edge of the cutting hole of the cutting plate hitting the workpiece, the size of the edge of the cutting hole will not deform the workpiece. The workpiece cutting device according to (1) or (4), wherein the workpiece suction force of the suction plate is set.
(7) The workpiece cutting device according to (1) or (4), wherein the suction plate is configured to suck the cut plate together with the workpiece, and prevents the workpiece from entering between the cut plate and the suction plate.
(8) By providing a suction manifold that is smaller in area than the cutting plate and movable below the suction plate, only the portion of the suction plate that overlaps the suction manifold exerts suction power. Described in (1) or (4), the plate adsorption area is reduced to the area of the adsorption manifold to reduce the extraction plate adsorption force, and the extraction plate can be moved smoothly without chattering even when the extraction plate is adsorbed by the adsorption plate. Work cutting device.
[0007]
In the workpiece cutting device of (1), since the workpiece supply magazine and the movable cutting plate are provided, the workpieces are cut out one by one from the lower end of each workpiece group (cutting is the meaning of taking out, and the meaning of cutting is In addition, since the suction plate is provided, the cutting plate can be moved while the workpiece is sucked onto the suction plate, and the workpiece can be positioned while the workpiece is transported by applying the edge of the cutting hole to the workpiece. As a result, both cutting and positioning of the workpiece can be performed.
In the workpiece cutting device of (2) above,
t₁≦ t_Three,
t₁+ T₂≧ t_Four,
t₁+ T₂≦ 2t_Three
Therefore, when moving the cutting plate in the horizontal direction, the workpiece can be prevented from being caught by the cutting hole and the supply magazine, and two workpieces can be cut from each workpiece group at the same time. can do.
In the workpiece cutting device of (3) above,
t₂≦ t_Five,
t₆≧ t_Five
Therefore, even when the workpiece immediately above the cut workpiece is dragged by the cut workpiece when cutting the workpiece, the stepped portion of the workpiece immediately above the cut workpiece is between the lower surface of the workpiece supply magazine and the upper surface of the cut plate. It can be prevented from entering the interval.
In the workpiece cutting device of the above (4) and (5), the cutting plate is movable in the first direction and the second direction intersecting with the cutting plate, so that the workpiece is placed on two sides of the cutting hole that intersect each other. Positioning can be performed in a direction, and positioning can be performed with higher accuracy than positioning in only one direction, regardless of the clearance between the work and the cut-out hole.
In the workpiece cutting device of (6) above, the workpiece suction force of the suction plate is set so that the edge of the cutting hole does not deform the workpiece, so even if the edge of the cutting hole hits the workpiece with a larger force than that, Since the workpiece moves relative to the suction plate, the workpiece does not deform during positioning.
In the workpiece cutting device according to (7), the suction plate is also sucked together with the workpiece, so that the workpiece can be prevented from entering between the cutting plate and the suction plate.
In the workpiece cutting device of (8) above, a movable suction manifold having a smaller area than the cutting plate is provided below the suction plate, so that only the portion of the suction plate that overlaps the suction manifold exerts a suction force. Therefore, the suction plate suction area of the suction plate is reduced to the suction manifold area, and the suction force of the cut plate is reduced. Even when the cut plate is sucked by the suction plate, it moves smoothly without chatter. be able to. This facilitates the positioning operation of the cutting plate.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the workpiece cutting device of the present invention will be described with reference to FIGS. FIG. 3 is a comparative example.
As shown in FIG. 11 to FIG. 13, the workpiece cutting device of the present invention has a plurality of workpiece groups in which thin workpieces 23 are stacked, and workpiece cutting device that horizontally cuts workpieces 23 one by one from the lower end of each workpiece group. It is.
The workpiece cutting apparatus according to the present invention includes a workpiece supply magazine 16, a cutting plate 17 having a workpiece cutting hole 26, and a suction plate 21.
[0009]
The workpiece supply magazine 16 is a fixed (stationary) member, and has at least one group of workpieces in which thin workpieces 23 are stacked in the vertical direction. The planar shape of the workpiece 23 may be different for each workpiece in the workpiece group. FIG. 13 shows a case where the planar shape of the work 23 is different for each work in the work group. The workpiece supply magazine 16 has a workpiece supply hole 20. The workpiece supply hole 20 has a planar shape slightly larger than the planar shape of the workpiece 23 so that the workpiece 23 can pass therethrough.
[0010]
The cutting plate 17 is a movable plate that can move in the horizontal direction with respect to the workpiece supply magazine 16. The workpiece cut-out hole 26 has a predetermined clearance in the horizontal direction between the workpiece 23 and the workpiece 23 in the same shape as the workpiece of each workpiece group below each stacked workpiece group. When the workpiece 23 at the lower end of each stacked workpiece group is dropped into the workpiece cutout hole 26 located below the cutout plate 17, the cutout plate 17 holds the dropped workpiece 23 in the workpiece cutout hole 26 and moves upward. Remove horizontally from the stacked workpiece.
[0011]
The cutting plate 17 can be horizontally stroked so that the workpiece cutting hole 26 can be stroked from below the workpiece supply magazine 16 to the end position of the workpiece conveyance stroke. The forward / reverse cylinder 2 shown in FIG. 12 strokes the cutting plate 17 in the workpiece transfer direction.
As shown in FIG. 12, in addition to the forward / backward moving cylinder 2, another forward / backward moving cylinder 3 for driving the cutting plate 17 is provided. The driving direction of the cutting plate 17 of the forward / reverse cylinder 3 intersects the driving direction of the cutting plate 17 of the forward / backward cylinder 2. Thus, even if the horizontal interval between the workpiece 23 of each workpiece group and the workpiece cut-out hole 26 into which the workpiece 23 is dropped differs for each workpiece group, the workpieces 23 of all the workpiece groups can be positioned in at least two directions. Become.
[0012]
The suction plate 21 is provided below the cutout plate 17, and the upper surface of the suction plate 21 is slidable with the lower surface of the cutout plate 17. As shown in FIG. 6, the suction plate 21 is a fixed member, and the cutout plate 17 strokes in the horizontal direction. The suction plate 21 has innumerable suction holes and sucks by sucking air, and the air pipe 18 in FIG. 13 is a suction air pipe.
[0013]
As shown in FIG. 1, the cutting plate 17 has a thickness t.₁have.
In order to make the movement of the cutting plate 17 smooth between the lower surface 27 of the portion of the workpiece supply magazine 16 located immediately above the cutting plate 17 and the upper surface of the cutting plate 17, a thickness t is set in the vertical direction.₂Interval 28 is provided.
As shown in FIG. 4, the workpieces 23 of a plurality of workpiece groups may be different for each workpiece group. However, since the workpieces 23 to be stacked are of the same type in the workpiece group, the thickness of the workpieces 23 is the same.
T_Three, Maximum thickness t_FourT₁, T₂, T_Three, T_FourIs
t₁≦ t_Three,
t₁+ T₂≧ t_Four,
t₁+ T₂≦ 2t_Three
Is set to
[0014]
With this setting, the workpiece 23 is prevented from being caught by the workpiece cutting hole 26 and the workpiece supply magazine 16 when the cutting plate 17 is moved in the horizontal direction, and two workpieces 23 are not simultaneously cut from each workpiece group. It becomes like this.
[0015]
As shown in FIGS. 1 to 4 (however, FIG. 3 is a comparative example), the thickness is increased in the vertical direction between the lower surface 27 of the portion of the workpiece supply magazine 16 directly above the cut plate 17 and the upper surface of the cut plate 17. T₂Interval 28 is provided.
The work 23 of at least one of the plurality of work groups is stepped and has a thickness t in the vertical direction._FiveThe thinnest wall portion (stepped portion) 29 is provided.
The workpiece supply magazine 16 is recessed upward so that the stepped portion 29 of the workpiece just above the workpiece 23 to be cut out can be stored on the lower surface of the portion (around the workpiece supply hole 20) for supplying the stepped workpiece 23. Depth t₆The recess 30 is formed. And t₂, T_Five, T₆Between,
t₂≦ t_Five,
t₆≧ t_Five
The relationship is set. FIG. 5 shows the step depth when FIG. 4 is viewed from the lower surface. The portion X corresponds to the recess 30 and is the deepest portion. The portion Y corresponds to the lower surface 27 of the portion located immediately above the cutting plate 17 of the workpiece supply magazine 16.
[0016]
With the above dimension setting, even when the workpiece just above the cut workpiece 23 is dragged by the cut workpiece when the workpiece 23 is cut out, the stepped portion 29 of the workpiece 23 just above the cut workpiece 23 is cut out from the lower surface 27 of the workpiece supply magazine. The distance 28 between the upper surface of the plate 17 is prevented from entering.
[0017]
In FIG. 6, the workpiece suction force of the suction plate 21 can be changed by controlling the magnitude of the negative air pressure. In FIG. 6, the hatched part is the suction part. The workpiece suction force of the suction plate 21 is determined by moving the cutting plate 17 in the horizontal direction while holding the workpiece 23 by suction, and positioning the workpiece 23 by the edge of the cutting hole 26 of the cutting plate 17 hitting the workpiece 23. The edge of the cut-out hole 26 is set to a size that does not deform the workpiece 23.
When the edge of the cut-out hole 26 hits the work 23 with a greater force, the work 23 moves on the suction plate 21, so that the work 23 can be prevented from being deformed even if the work 23 has low rigidity.
[0018]
Further, the suction plate 21 sucks the cut plate 17 together with the work 23. If the work 23 suction force by the suction plate 21 is f1, and the cutting plate 17 suction force by the suction plate 21 is f2, then f1 <f2. Thus, the work 23 is prevented from entering between the cutting plate 17 and the suction plate 21 during the cutting operation.
In the suction manifold, a workpiece suction portion and a cut plate suction portion are separated (f1 <f2 is possible because negative pressure is supplied separately). As another method for enabling f1 <f2, the shape and size of the hole for supplying the negative pressure of the suction plate is changed between the workpiece suction portion and the cut plate suction portion.
[0019]
As shown in FIGS. 7 and 8, only the portion of the suction plate 21 that overlaps the suction manifold 1 is provided below the suction plate 21 by providing the suction manifold 1 that is smaller in area than the cutout plate 17 and that is movable. Is designed to exert a suction force. In FIG. 8, only the hatched part is the suction part.
By providing the suction manifold 1, the suction area of the cutting plate 17 of the suction plate 21 is reduced to the area of the suction manifold 1, the suction force of the cutting plate 17 of the suction plate 21 is reduced, and the cutting plate 17 is moved by the suction plate 21. The cut-out plate 17 can be moved smoothly without chatter even in the adsorbed state.
[0020]
The work 23 is made of, for example, a thin work with low rigidity. The low rigidity thin workpiece is, for example, a resin seal plate of a fuel cell. The seal plate is a member that covers the groove of the gas flow path between the gas flow path and the gas manifold in the fuel cell power generation region of the fuel cell separator. The fuel cell (usually hydrogen) inlet and outlet and the oxidizing gas (usually air) inlet and outlet are provided at the fuel cell (usually air) inlet and outlet, and each has a different shape (planar shape, thickness). Work pieces having a shape (planar shape shown in FIG. 2 and thickness direction shape shown in FIG. 4) are cut out one by one from the lower end of each work laminate. This is dropped into four cutout holes 26 provided in one cutout plate 17, and the cutout plate 17 is moved to the transfer end in the transfer direction to perform both cutout and positioning during movement.
[0021]
Next, the operation of the workpiece cutting device of the present invention will be described together with a further configuration.
In FIG. 11, a work 23 (for example, a seal plate of a fuel cell) is dropped onto the work supply magazine 16 along the work supply guide bar 22 and stacked and set on the work supply magazine 16. In FIG. 13, four types of stacked workpiece groups are arranged in parallel to each other in the workpiece supply holes 20 corresponding to the workpiece groups for each workpiece group. The workpieces 23 stacked in each workpiece group have the same shape, but the workpieces 23 have different shapes if the workpiece groups are different.
[0022]
The work 23 at the lower end of each stacked work group is dropped into a corresponding cut-out hole 26 of the cut-out plate 17 that is brought below the work supply magazine 16. The workpiece 23 dropped into the cutout hole 26 is sucked and held by the suction plate 21. The negative air pressure enters the suction plate 21 through the path of the air pipe 18, the movable suction manifold 1, and the suction plate 21.
[0023]
Next, the cutting plate 17 is advanced in the first direction by the advance / retreat cylinder 2 (motion 1), and then is advanced in the second direction intersecting the first direction by the advance / retreat cylinder 3 (motion 2). ). By this movement, both the cutting of the work 23 at the lower end of each stacked work group and the positioning of the work by the cutting hole 26 are performed.
[0024]
In the cutting and positioning, the movable suction manifold 1 and the cutting plate 17 are integrally moved and moved by the motion 1 forward / backward cylinder 2 in the motion 1 operation with the work 23 held by the suction plate 21. It moves forward until the stopper pad 24 of the manifold 1 hits the motion 1 forward end stopper 11. In this state, the rear end in the motion 1 feeding direction of the workpiece 23 is in contact with the opposing edge of the cutout hole 26, and the workpiece 23 is positioned with respect to the cutting plate 17 in the motion 1 feeding direction.
Reference numeral 10 denotes a motion 1 forward end absorber for buffering the impact. Note that a motion 1 backward end absorber 4 and a motion 1 backward end stopper 5 are also provided at the backward end.
The movable suction manifold 1 is provided with a driving cam 6. Reference numeral 7 denotes a movable suction manifold cross LM (linear motion) guide. Reference numeral 19 denotes a cut plate tension adjusting shaft. In the motion 1, the driving cam 6 is guided by the motion 1 driving cam guide rail 8.
[0025]
Next, in the motion 2 motion, the movable suction manifold 1 and the cutting plate 17 are integrated by the motion 2 forward / backward cylinder 2 until the stopper pad 25 of the movable suction manifold 1 hits the motion 2 forward end stopper 13. To do. In this state, the rear end of the work 23 in the feed direction of the motion 2 is in contact with the opposing edge of the cutout hole 26, and the work 23 is positioned with respect to the cutout plate 17 in the feed direction of the motion 2.
Reference numeral 12 denotes a motion 1 forward end absorber for buffering the impact. Note that a motion 2 backward end absorber 15 and a motion 2 backward end stopper 14 are also provided at the backward end.
In the motion 2, the driving cam 6 is guided by the motion 2 driving cam guide rail 9.
[0026]
Next, the operation of the present invention will be described.
First, an operation related to workpiece cutting will be described. In the workpiece cutting apparatus according to the present invention, the workpiece supply magazine 16 and the movable cutting plate 17 are provided, so that the workpieces 23 can be cut out one by one from the lower end of each workpiece group, and the suction plate 21 is provided. The workpiece 23 can be positioned while the workpiece 23 is being conveyed by moving the cutting plate 17 while the workpiece 23 is sucked to the suction plate 21, and contacting the edge of the cutting hole 26 against the workpiece 23. As a result, in FIG. 14, both the cutting and positioning of the workpiece 23 can be performed by one stroke of the cutting plate 17 from the front end to the rear end.
Further, in FIG. 14, at least one (in the illustrated example, a plurality of, for example, four) cutout holes 26 having different shapes are provided in the cutout plate 17, and stacked on each cutout hole 26. The workpiece 23 at the lower end is dropped from the workpiece group one by one, and one workpiece at the lower end is removed from each stacked workpiece group (four workpiece groups in the illustrated example) by one stroke of the cutting plate 17. (In the illustrated example, a total of four sheets) can be cut out simultaneously and positioned.
[0027]
The cutting plate 17 has a thickness t₁The vertical interval t between the lower surface 27 of the workpiece supply magazine 16 and the upper surface of the cutting plate 17₂, Minimum thickness t of workpieces 23 in a plurality of workpiece groups_Three, Maximum thickness t_FourBetween,
t₁≦ t_Three,
t₁+ T₂≧ t_Four
Therefore, when the cutting plate 17 is moved in the horizontal direction, the work 23 can be prevented from being caught by the cutting hole 26 and the work supply hole 20 of the supply magazine 16. Also,
t₁+ T₂≦ 2t_Three
Thus, it is possible to prevent two workpieces 23 from being cut out simultaneously from each stacked workpiece group.
[0028]
In the workpiece cutting device of the present invention, the vertical interval t between the lower surface 27 of the workpiece supply magazine 16 and the upper surface of the cutting plate 17 is also shown.₂The thickness t of the thinnest wall portion 29 of the stepped workpiece_FiveThe depth t of the concave portion 30 that is formed in the lower surface 27 of the workpiece supply magazine 16 and is recessed upward.₆,Between,
t₂≦ t_Five,
t₆≧ t_Five
Therefore, even when the workpiece immediately above the cut workpiece 23 is dragged by the cut workpiece 23 when the workpiece is cut out, the stepped portion 29 of the workpiece immediately above the cut workpiece is cut out from the lower surface 27 of the workpiece supply magazine 16. It is possible not to enter a space between the upper surface of the plate 17. When the stepped portion 29 of the work 23 enters the recess 30 and the cutting plate 17 is moved, the work 23 is pushed by the side wall of the recess 30.
FIG. 3 is a comparative example (not included in the present invention) and is a case where the recess 30 of FIG. 4 is not provided. If the recess is not provided as shown in FIG. 3, the thinnest portion of the stepped workpiece may enter the space between the lower surface of the workpiece supply magazine and the upper surface of the cutting plate, and the movement of the cutting plate may be locked. In the present invention, this is prevented.
[0029]
In the workpiece cutting apparatus according to the present invention, as shown in FIGS. 9 and 10, the cutting plate 17 is movable in a first direction and a second direction intersecting with the cutting plate 17, and two-stage motions of motion 1 and motion 2 are performed. The workpiece 23 can be positioned in at least two directions by contacting the two sides of the cutout hole 26 that intersect each other, and at least in two directions regardless of the clearance between the workpiece 23 and the cutout hole 26 over the entire circumference of the workpiece. Positioning can be performed, and positioning can be performed with higher precision than positioning in only one direction. If the motion stroke of motion 1 is ST1 and the motion stroke of motion 2 is ST2, ST1> ST2 so that the workpiece can be positioned smoothly even if the suction force of the workpiece 23 changes in the cutting direction. is there.
[0030]
In the workpiece cutting device according to the present invention, since the workpiece suction force of the suction plate 21 is set so that the edge of the cut hole 26 does not deform the workpiece 23, the edge of the cut hole becomes the workpiece 23 with a larger force than that. Since the work 23 moves relative to the suction plate 21 even if it hits, the work 23 will not be deformed during positioning.
Further, since the suction plate 21 not only sucks the work 23 but also the cutting plate 17, the work 23 sinks between the cutting plate 17 and the suction plate 21 during the movement of the cutting plate 17. Can be prevented. In this case, since the relationship of f1 <f2 is provided between the workpiece suction force f1 and the cutting plate 17 suction force f2, the workpiece 23 can be more reliably submerged between the cutting plate 17 and the suction plate 21. Can be prevented.
[0031]
In addition, a suction manifold 1 that is movable in a smaller area than the cut-out plate 17 is provided below the suction plate 21, and only a portion of the suction plate 21 that overlaps the suction manifold 1 exhibits a suction force. The suction area of the cut plate 17 of the plate 21 is reduced to the area of the suction manifold 1, and the suction force of the cut plate 17 is reduced. As a result, even when the cutout plate 17 is sucked by the suction plate 21, the cutout plate 17 can be moved smoothly without chattering (without causing stick and slip). Thereby, the positioning operation of the cutting plate 17 becomes smooth.
[0032]
【The invention's effect】
According to the workpiece cutting device of the first to eighth aspects, since the workpiece supply magazine, the movable cutting plate, and the suction plate are provided, both the cutting of the workpiece and the positioning of the workpiece can be performed.
According to the workpiece cutting device of claim 2, t₁≦ t_Three, T₁+ T₂≧ t_Four, T₁+ T₂≦ 2t_ThreeTherefore, it is possible to prevent catching between the cut hole of the cut workpiece and the supply magazine and cutting out two workpieces from each stacked workpiece group.
According to the workpiece cutting device of claim 3, t₂≦ t_Five, T₆≧ t_FiveTherefore, it is possible to prevent the stepped portion of the workpiece immediately above the cutting workpiece from entering the gap between the lower surface of the workpiece supply magazine and the upper surface of the cutting plate and causing a lock.
According to the workpiece cutting device of the fourth and fifth aspects, since the workpiece cutting plate is caused to perform the two-stage motion having different moving directions, it is possible to perform highly accurate positioning.
According to the workpiece cutting device of the sixth aspect, since the workpiece suction force of the suction plate is set so that the edge of the cutting hole does not deform the workpiece, the workpiece is not deformed during positioning.
According to the workpiece cutting device of the seventh aspect, since the suction plate also sucks the cutting plate, it is possible to prevent the workpiece from entering between the cutting plate and the suction plate.
According to the workpiece cutting device of the eighth aspect, since the suction manifold that is movable in a smaller area than the cutting plate is provided below the suction plate, the cutting plate can be moved without chatter even when the cutting plate is sucked by the suction plate. it can.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a workpiece cutting device according to the present invention in the vicinity of a workpiece at the lower end of a workpiece group among a workpiece at the lower end of at least one workpiece group, a workpiece immediately above the workpiece, and a cutting plate and a workpiece supply magazine. (It is also an enlarged detail view of part A in FIG. 3).
FIG. 2 is a plan view of the vicinity of the workpiece at the lower end of the workpiece group among the workpiece at the lower end of the workpiece group and the cutting plate of the workpiece cutting device according to the present invention.
FIG. 3 is an enlarged cross-sectional view of the vicinity of a workpiece at the lower end of the workpiece group in the workpiece at the lower end of the workpiece group and a cutting plate and a workpiece supply magazine in the comparative example.
FIG. 4 is an enlarged cross-sectional view of a workpiece cutting device according to the present invention in the vicinity of a workpiece at the lower end of the workpiece group among a workpiece at the lower end of a plurality of workpiece groups, a workpiece immediately above the workpiece, and a cutting plate and a workpiece supply magazine. .
5 is a bottom view of the device portion of FIG. 4 (view A in FIG. 3).
FIG. 6 is a partial cross-sectional view of a cutting plate, a suction plate, and a workpiece of the workpiece cutting device of the present invention.
FIG. 7 is a plan view of a part of a cutting plate and a workpiece in the workpiece cutting device of the present invention.
8 is a cross-sectional view taken along line A in FIG. 7 and a cross-sectional view taken along line B in the apparatus portion of FIG.
FIG. 9 is a plan view of a part of the cutting plate in motion 1 of the workpiece cutting device according to the present invention.
FIG. 10 is a plan view of a part of a cutting plate in motion 2 of the workpiece cutting device according to the present invention.
FIG. 11 is an overall side view of the workpiece cutting device according to the present invention.
12 is a B view (a plan view of a B view portion) of the apparatus of FIG. 11. FIG.
13 is a view A (plan view of a portion A) of the apparatus shown in FIG.
FIG. 14 is a perspective view showing the moving direction of the cutting plate and the movable suction manifold in the workpiece cutting device of the present invention.
[Explanation of symbols]
1 Movable adsorption manifold
2 Moyon 1 Forward / backward cylinder
3 Moyon 2 Forward / backward cylinder
4 Motion 1 Back end absorber
5 Motion 1 Back end stopper
6 Movable suction manifold drive cam
7 Cross LM (Linear Motion) Guide for Movable Suction Manifold
8 Drive suction manifold drive cam guide rail (Motion 1)
9 Drive guide manifold drive cam guide rail (Motion 2)
10 Motion 1 Forward end absorber
11 Motion 1 Advance end stopper
12 motion 2 forward end absorber
13 Motion 2 Advance end stopper
14 Motion 2 Back end stopper
15 Motion 2 Back end absorber
16 Work supply magazine
17 Work cutting plate (simply called cutting plate)
18 Air piping
19 Workpiece cutting plate tension adjustment shaft
20 Work hole
21 Suction plate
22 Guide bar for workpiece supply
23 Workpiece (for example, fuel cell seal plate)
24 Movable suction manifold motion 1 forward end stopper stopper
25 Movable suction manifold motion 2 forward end stopper stopper
26 Workpiece cutting hole
27 Workpiece supply magazine bottom
28 intervals
29 Thinnest part
30 recess

Claims (8)

A workpiece cutting device for horizontally picking out workpieces one by one from the lower end of a workpiece group in which workpieces are stacked,
A workpiece supply magazine having at least one group of workpieces in which thin-walled workpieces are stacked in the vertical direction;
It is movable with respect to the workpiece supply magazine, and has a cut-out hole with a predetermined clearance between the workpieces in the same shape as the workpieces of each workpiece group below each workpiece group. A cutting plate that holds the dropped workpiece in the workpiece cut-out hole when the workpiece is dropped into the cut-out hole positioned below the workpiece and separates it from the stacked workpiece positioned above, and takes it out horizontally;
A suction plate that is provided under the cutting plate and whose upper surface can slide with the lower surface of the cutting plate;
Work cutting device equipped with. The cutting plate has a thickness t ₁ ,
Between the lower surface of the workpiece supply magazine and the upper surface of the cutting plate, a gap of thickness t ₂ is provided in the vertical direction.
When the minimum thickness of workpieces in multiple workpiece groups is t ₃ and the maximum thickness is t ₄ ,
t ₁ ≦ t ₃ ,
t ₁ + t ₂ ≧ t ₄ ,
t ₁ + t ₂ ≦ 2t ₃
The workpiece is prevented from being caught by the cutout hole and the supply magazine when the cutting plate is moved, and two workpieces are not taken out from each workpiece group at the same time. Work cutting device. Between the lower surface of the workpiece supply magazine and the upper surface of the cutting plate, a gap of thickness t ₂ is provided in the vertical direction.
The workpieces of at least one of the plurality of workpiece groups are stepped and have the thinnest wall portion t ₅ .
The work supply magazine, the lower surface portion for supplying the stepped with shaped work, to form a ready-receiving stepped portion of the work of the above, the recess depth t ₆ recessed above the workpiece to be taken out,
t ₂ ≦ t ₅ ,
t ₆ ≧ t ₅
Even if the work immediately above the work taken out at the time of picking up the work is dragged by the picked-up work, the stepped portion of the work just above the picked-up work is not connected to the lower surface of the work supply magazine. 3. The workpiece cutting device according to claim 1, wherein the workpiece cutting device does not enter a space between the upper surface of the cutting plate. A workpiece cutting device that takes out workpieces one by one from the end of a workpiece group in which workpieces are stacked,
Workpiece supply means having at least one group of the workpiece groups in parallel;
Cutting means provided so as to be movable and holding the workpiece at the end of the workpiece group and taking it away from the workpiece group;
A suction means that is provided in the cutting means and holds the work taken out by the cutting means;
The cutting means can be moved in a first direction by a first driving means, and can be moved in a second direction intersecting the first direction by a second driving means, and the cutting means holding a workpiece. The workpiece cutting device is characterized in that the workpiece is positioned in multiple directions. 5. The workpiece cutting device according to claim 4, wherein the workpiece shape of at least one workpiece group is different from the workpiece shape of the other workpiece group, and workpieces having different shapes are taken out simultaneously. Move the cutting plate while holding the workpiece on the suction plate by suction, and when the workpiece is positioned by the edge of the cutting hole of the cutting plate hitting the workpiece, the size of the suction plate The workpiece cutting device according to claim 1 or 4, wherein a workpiece suction force is set. The workpiece cutting device according to claim 1 or 4, wherein the suction plate is configured to suck the cut plate together with the workpiece, and prevents the workpiece from entering between the cut plate and the suction plate. A suction manifold that is movable in a smaller area than the cut plate is provided below the suction plate, so that only the portion of the suction plate that overlaps the suction manifold exerts a suction force. The workpiece cutting out according to claim 1 or 4, wherein the cutting plate adsorption force is reduced by reducing the area of the suction manifold so that the cutting plate can be moved smoothly without chattering even when the cutting plate is sucked by the suction plate. apparatus.

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