JPS61103625A - Panel former - Google Patents

Abstract

PURPOSE:To automate a bending work by providing the rotary unit to hold the york and work moving in the direction perpendicularly intersecting with a bending line, also by arranging the pusher mechanism which is movable back and forth relatively to the york. CONSTITUTION:A movable york 40 is arranged in the gap of a table center, placed on the rail 41 is a machine base 25 and made movable in the perpendicularly intersecting direction with a bending line via a cylinder CY4. The upper part rotary unit 44 and lower part rotary unit 46 hold a work 60 and are respectively fitted to the tip of the upper arm 42, lower arm 45 of the york 40. The pusher mechanism 50 to feed the work 60 to the bending line is arranged on the lower arm 45 of the york 40. The work 60 is bet by up-bending die 4 or down-bending die 5 after being set to the center of a bender 1 and worked with the butt rotation under being held by the rotary units 44, 46. with this mechanism, therefore, all the work of the four sides is automated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a panel former for folding the ends of a rectangular worksheet (metal plate material).

[Prior Art] Panels made by folding the ends of each of the four sides of a rectangular worksheet (hereinafter referred to as the work) once or twice or more are used in cabinets, showcases, vending machines, freezers/refrigerators, air conditioners, and computers. It is used for U-unit, etc. In order to make such a panel, the four sides of the workpiece are sequentially bent using two or more wing benders, cokibenders, press brakes, etc., each having a long side and a short side with different mold lengths. For example, as shown in Fig. 14, the workpiece 60 (short side W
After bending the edge of one short side 61 of X long side l) into two stages (short side bending), rotate the workpiece 180 degrees on the handling table and bend the other short side 62. Then, the workpiece is rotated 90 degrees to bend the edge of one long side 63 (long side bending), and then rotated 180 degrees to bend the other long side 64. As shown in the figure, a rectangular product with a width W and a length was obtained by bending the first step E1 and the second step H by bending each of the four sides into the shape of an opening.

As mentioned above, the workpiece needs to be rotated by 90'', 180° or 270° in the horizontal plane each time each side is bent on the handling table. Doing it manually is dangerous.

For this purpose, an electromagnet is suspended on the lower side of the work table, and several shafts are installed on the workpiece feeding side.The workpiece is rotated at the desired angle at the workpiece lifting position, and after descending to the table surface, the workpiece is placed in front using the shaft mechanism. Although there is also a known device for transporting the material, the equipment and operating costs increase, which inevitably leads to higher product costs.

In order to improve these shortcomings, the Special Publication No. 58-41132
In the publication, a handling table is provided in front of a bending press capable of upward bending and downward bending, and a yoke-shaped moving body that moves forward and backward in a direction perpendicular to the bending line is installed, and a workpiece gripping rotation mechanism is installed at the tip of the moving body. This patent discloses an apparatus in which a workpiece is ejected, bent, and rotated using a single restraint machine to efficiently bend four sides.

[Problems to be Solved by the Invention] However, the device disclosed in the above-mentioned Japanese Patent Publication No. 58-41132 allows a yoke-shaped movable body placed on a base to be directly moved back and forth by a hydraulic cylinder, and the movable body Since this method determines the linear displacement of the workpiece using a mechanical program controller, when bending each side, the yoke-shaped moving body is moved back to the position where the maximum workpiece can be rotated, and from there, the Avro T chisel is placed on the bending line. The problem was that the takt time was long and there was a limit to productivity improvement.

In view of the above points, it is an object of the present invention to provide an apparatus that shortens the tact time for four-side bending and performs the bending process at high speed when bending the end portion of a workpiece using one machine.

[Means for Solving the Problems] In order to achieve the above object, the present invention releases the grip on the workpiece while keeping the yoke stopped after rotating the workpiece, and operates the pusher to advance the workpiece to the bending line. It was designed so that In other words, the present invention provides an apparatus for grasping the center of a workpiece and moving it forward and backward along a folding line, and rotating the workpiece at a predetermined angle using a rotating unit to sequentially bend the four side edges. A yoke is attached to the center so that it can move forward and backward in a direction perpendicular to the folding line, a rotation unit is installed at the tip of the yoke to grip the center of the workpiece and rotate the workpiece, and it moves back and forth relative to the movement of the yoke. The present invention relates to a panel former characterized in that it is equipped with a C pusher mechanism mounted on the side of a rotating unit in order to accomplish this.

The pusher mechanism has a pusher member fixed to the forward side of an endless chain horizontally stretched across the lower arm of the yoke, and a chain gripping member connected to the tip of the piston rod of the cylinder on the return side of the endless chain. ing. When the yoke is moved with the chain gripping member stopped at the return position of the cylinder, this pusher member comes into contact with the rear part of the workpiece and can then be pushed to the bending position at twice the speed of the movement of the yoke. ,
Furthermore, when the workpiece is rotated, by operating the cylinder to the approach side end, the workpiece can be moved to a position outside the maximum rotation radius, thereby avoiding interference with the workpiece during rotation.

The pusher mechanism may be a rack and pinion type instead of a chain drive type. In addition, in the present invention, NC control is adopted for operations such as feeding the workpiece, determining the width (perpendicularity), advancing the workpiece to the folding line, pressing the workpiece against the abutment piece (back gauge), gripping the workpiece, retreating, and rotating the workpiece. By doing so, flexible production can be performed for bending workpieces of different sizes.

[Example 1] The panel former of the present invention bends the four sides of the work plate at an acute angle or an obtuse angle, bends it downward, or continuously bends it in a U-shape or Z-shape, and bends the four sides of the workpiece board at an acute angle or an obtuse angle. The machine automatically performs edge processing, etc., and the entire device consists of a folding machine and a front table device.

In the examples shown in FIGS. 1 to 11, a coki bender is used as the bending machine, and in FIG. 12, a wing bender is used. First, explanation will be given based on FIGS. 1 and 2. In the figure, 1 is a bending machine body, 2 is a clamp type, 3 is a fixed type, 4 is an upper bending type, 5 is a lower bending type, 7 is a ram, 8 is a bed, 9 is a belt conveyor, and 10 is a frame.

At the top of the frame 10 is a hydraulic cylinder CY for driving the ram.
1 is provided, and a toggle is connected to the piston rod to cause the ram 7 to move up and down. The toggle mechanism is frame 10
The groove is made up of a link 11 suspended from the upper part of the ram using a pin, a link 12 raised from the ram side using a pin, and a piston rod 14 that combines both links and is fixed with a common pin 13. Further, although not shown in the drawings, the clamp mold 2 is equipped with a mold quality changing device.

The upper bending type and the lower bending type each have a backup of 15
Arms 18a and 18b are fixed to holders 15 and 16 with arms 15 and 16a, and are connected to each other at the rear by connecting plates 17 and pins 22, respectively. These arms are attached to the rear end of the upper bending die and the lower bending die TlA1 so that each bending die rotates approximately tangentially to the bending line, and one arm 18a is equipped with a hydraulic pressure for bending. Cylinder CY2 is installed. Arms 18a, 18b
+7) The front end is supported by eccentric shafts 19a and 19b, gears 20a and 20b are engaged with these, respectively, and one gear 2
A rack 21 driven by cylinder CY2 is engaged with 0a. However, instead of this rack, an NC-controlled motor (not shown) may be installed. The hydraulic cylinder CY2 for bending is always in the middle position, and extends the piston rod 23 when bending upward, and contracts the piston rod 23 when bending downward. These operations are performed by the link action of an arm, a connecting plate, and an eccentric shaft. In other words, upward and downward bending is realized by one hydraulic cylinder CY2. In addition, when it is necessary to adjust the clearance between the vertical bending die and the clamp die in anticipation of a change in the thickness of the worksheet 60 or an overbend, the cylinder CY3 is driven, and the rack 21 and gear 20 are
The eccentric shafts 19a and 19b are rotated via the shafts a and 20b.

Note that a back gauge 59 is provided behind the vertical bending mold as shown in FIG. 6, but is not shown in FIGS. 1 and 2C.

Next, the front table device will be explained.

As shown in FIG. 1, a metal plate 25 is provided in front of the bending machine main body 1, and a table 26 for handling the workpiece and a movable yoke 40 that can move forward and backward with respect to the bending line are installed. The table 26 is arranged at the same level as the belt conveyor 9 on the left and right sides of the front of the main body excluding the center as shown in the plane in FIG. ! It consists of 27 roller conveyors with 2 losses. Each roller conveyor has a large number of ball casters 29 mounted within a frame 28, and moves and rotates the workpiece 60 along a perspective line formed by the upper surface of the row of ball casters. The table 26 also has a centering feature 30 as shown in FIG. This mechanism 30 moves the workpiece 60 supplied to the table 26 to the center of the table and aligns the workpiece at right angles to the folding line.
A screw rod 31 with left and right reverse threads, a screw rod drive device 32, an arm 33 screwed onto the screw rod, a movable member 34 attached to the upper end of the arm,
It consists of a guide rail 35 as a movable member. In addition,
During the centering operation, the arm 33 itself is erected by claws, links, or other means (not shown) and moved on the table top surface, but as shown by chain lines in FIG. and ensure that there is no hindrance to transport.

A moving yoke 40 is arranged in a gap at the center of the table 26. This yoke 40 is connected to the rail 41 on the machine base 25.
It is placed in a direction perpendicular to the folding line and is movable by a forward/reverse hydraulic cylinder CY4. At the tip of the upper arm 42 of the yoke is a cylinder CY5 that constitutes a lifting mechanism.
A vertically slidable tip 43 is attached to support a rotatable pad 44.

On the other hand, a lower pad 46 is supported at the tip of the lower arm 45 of the yoke at a position opposite to the upper pad 44. Lower pad 4
A gear or sprocket 47 is provided on the shaft of 6, and this is connected to a rotary drive device 48 attached to the underside of the lower arm.

The upper and lower pads 44, 47 and the rotation drive device 48 constitute a work rotation mechanism. Further, the lower arm 45 of the movable yoke 40 is provided with a pusher opening groove 50 for feeding the workpiece to the folding line. This pusher mechanism 50
As shown in the figure, a pair of sprockets 51 and 52 are attached near the tip of the lower arm 45 and the rear end of the yoke, an endless chain 53 is placed around both sprockets 51 and 52, and a pusher support 54 is fixed to the upper chain. , a pusher member 56 attached to the pusher support 54 via a spring 55, a chain gripping member 57 fixed to the lower chain, a piston rod 58 attached to the rear end of the chain gripping member 57, and a pusher member 56 fixed to the machine base 52. It consists of a hydraulic cylinder CY6. When the pusher member 56 drives the yoke forward/backward movement cylinder CY4 while the hydraulic cylinder CY6 is extended, as the yoke 40 moves,
The chain 53 is rotated relative to each other, resulting in a feeding action with increased speed relative to the movement of the yoke. Further, when the cylinder CY6 is driven with the yoke 40 stopped, the pusher member moves in the front-back direction by the stroke thereof.

[Function] The function of the above device will be explained. The workpiece 60 carried onto the table 26 by the belt conveyor 7 is stopped at the center of the bending rock main body 1 by the centering button 30. The yoke 40 is set in advance by operating the cylinder CY4 at a position that allows for room for rotation of the workpiece. Next, the pusher member 5G is advanced by the cylinder CY6, and after hitting the back gauge (Fig. 6) and determining the bending height, the clamping cylinder CY1 is operated to clamp the end of the workpiece between the clamp mold 2 and the fixed mold 3. It is clamped, and the upper bending die 4 or the lower bending die 5 is driven by the cylinder CY2 to perform flat bending. In the case of upward bending, the force of the cylinder CY2 is directly transmitted to the upper bending die 4, and in the case of downward bending, it is transmitted to the lower bending die 5 via the connecting plate 17 and the arm 18b. They are connected by eccentric shafts 19a, 19bG and TM vehicles 20a, 20b, and by operating cylinder CY3, arms 18a, 18
By changing the eccentric mounting position of b, the upper and lower bending dies can be moved slightly back and forth, and as a result, the workpiece can be bent at an acute angle or an obtuse angle. rack 2
The amount of movement of 1, that is, the eccentricity is NO controlled.

When determining the width of the workpiece (centering), placing it against the back gauge, and bending the four sides in conjunction with the pull-back rotation as described above, it is necessary to set the forward and backward movements to a minimum. When the center of the workpiece 60 is pressed and abutted by the rotating pads 44 and 46 and rotated, the shortest tact time is achieved, but this alone does not ensure that the workpiece is accurately parallel to the folding line. Therefore, in the present invention, as shown in FIG. During this period, the distance 11t fl 2 from the rotation center position B to B' and the distance 13 between the rear end position of the abutted workpiece and the starting position of the pusher member 56 are always 1:2. In other words, the workpiece is moved forward and backward and rotated by the operation of the rotary pad, and only when it hits the back gauge, the space between the rotary pads 44 and 46 is opened and the pusher is used to make it parallel. The rotating pad is automatically positioned at the center of the workpiece, allowing accurate dimensioning.

Next, the operation will be described in more detail based on FIG. 6 and subsequent figures. FIG. 6 shows a state in which a workpiece 60 with its long side facing in the transport direction is transported by the conveyor 9 to approximately the center of the main body 1 and once stopped, and then brought closer to the center by the centering mechanism 26 and stopped. .

In this state, the cylinder CY6 is at the forward limit, and the pusher portion t456 is at the standby position C.

The standby position means a retreated position where the pusher member 56 does not interfere with the work when the work is rotated.

For example, as shown in Figure 11, if the maximum length of the workpiece is 1200+nn+ and the shortest side is 800mm, the diagonal is approximately 1440mm, so the workpiece rotation radius is 720mm, but for added safety, 1/2 of the long side = 600mm. Position C with a margin of distance m = 200 + u
1, that is, the position 800 mm away from the center B of the rotating pad is the Samurai Akebono position. Next, as shown in FIG. 7, the pusher cylinder CY6 is driven to the intermediate position, and the chain gripping member 57 is pulled by a distance equal to the distance m, thereby advancing the pusher member 56 to the position G. At this time, assuming that the bending line is A, the distance from the bending line to the rotating unit and the distance from the rotating unit to the pusher are <AB=42+=BG as shown in FIG.

Next, the cylinder CY4 is driven to move the yoke 40 forward. Since the pusher cylinder CY6 is fixed to the machine base 52, the chain 53 rotates relatively as the yoke 40 moves, and the pusher member 57 moves forward as shown in FIG. In this movement, as shown in FIG. 11, when the moving distance of the yoke is ρ2, the pusher member moves a distance of ll3=2Xf2. When the pusher member contacts the rear end of the workpiece, the limit switch (not shown) is turned on and the cylinder CY5 is turned on.
is activated, the rotary pad 44 descends and grasps the workpiece. With the workpiece gripped, cylinder CY4 is exhausted, and cylinder CY6 is advanced to release pusher member 57.
After returning to the original position, the rotating device 48 is driven to rotate the workpiece 90 degrees so that the short side is oriented parallel to the folding line.

Next, the cylinder CY6 is driven to the middle position to advance the pusher member 57 to position G, and at the same time, the cylinder CY4 is
As described above, the chain 53 is run at double speed, the pusher member is moved to the position D in FIG. 11, and the tip of the workpiece is pressed against the back gauge 59 (FIG. 9). At this position, the limit switch turns ON and the rotating unit turns OFF.
becomes. In this state, the clamp mold 2 is lowered to clamp the tip of the workpiece, and the ram 7 is operated to perform upward or downward protrusion as shown in FIG. 4 or 5. Immediately open the mold, lower the pads 44 and 46 again to grip the workpiece, and return it to the position shown in FIG. At this time, sprocket 51
．． 52 rotates in the opposite direction to the front and moves the pusher member 56 back to position G. After one of the short sides is bent in this manner, the workpiece 60 is rotated 180° and the other short side is bent in the same manner. Next, the workpiece is rotated 90 degrees and the first long side is bent, and the workpiece is further rotated 180 degrees and the other long side is bent to complete the entire bending.

In the above embodiment, the bending was described, but it can also be applied to a wing bender (or folding machine). As shown in Fig. 12, the wing bender holds a workpiece 60 with an upper mold 2 attached to the lower part of the ram and a lower mold 3 installed on the bed, and is movable (wing The edge of the workpiece is bent by rotating the mold 6 by about 90 degrees as shown by the arrow. The movable mold 4 is supported by shafts at both ends of the bed and has a cylinder CY attached to the beam 6a.
It is rotated by the piston rod extension of 7. When bending a workpiece, the workpiece is fed and the rotary bending height is determined by the action of the front surface daple similar to the previous embodiment, and the workpiece is bent on four sides.

[Effects of the Invention] As described above, the present invention has a yoke that can move forward and backward at the center of the front table, a workpiece that rotates while gripping the center of the workpiece is provided at the tip of the yoke, and a workpiece that rotates while gripping the center of the workpiece is further provided on the side of the rotation unit. Since the pusher for feeding the workpiece is equipped with a structure, it is possible to automate the four-sided bending process by feeding the workpiece, rotating it, etc. In particular, the pusher for feeding the workpiece is attached to a chain that runs on the lower arm side of the yoke, and is fed out relative to the movement of the yoke, so the workpiece can be dimensioned quickly and accurately, and when the workpiece is rotated, it Since it is moved back to a position where it does not interfere, it has the advantage of smooth handling of workpieces on the table.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the panel former of the present invention, Fig. 2 is a plan view, Fig. 3 is a sectional view taken along the line Fig. 5 is an enlarged sectional view showing the mutual relationship between the molds, Fig. 5 is an enlarged sectional view during F bending, Figs. 6 to 10 are side views showing the operating state of the front table device, and Fig. 11 is a side view showing the workpiece rotation and pusher. FIG. 12 is a side view when a wing bender is used as a folding machine, FIG. 13 is a perspective view of a completed folded product, and FIG. 14 is a perspective view of a worksheet. 1...Bending machine body, 2...Clamp type, 3...
Fixed type, 4... Upper bending type, 5... Lower bending type, 6...
・1liT first model, 7...ram, 8...bed, 9.
...Belt conveyor, 26...Table, 29...
Ball caster, 40... Yoke, 42... Upper arm, 44.45... Rotating pad (rotating unit), 50... Pusher [, 51, 52... Sprocket, 53... Chain, 56... Pusher member, 57... Chain gripping member. Figure 12 Figure 13 Figure 14

Claims (1)

[Claims] 1. After the workpiece supplied to the front table of the bending machine is moved to the center of the machine by the centering mechanism, the workpiece is moved forward and backward along the folding line while grasping the center of the workpiece, and the workpiece is rotated by the rotation unit. In this device, a yoke is attached to the center of the front table so that it can move forward and backward in a direction perpendicular to the folding line, and a yoke is installed at the tip of the yoke to grip the center of the workpiece and rotate the workpiece. 1. A panel former comprising: a rotating unit; and a pusher mechanism for feeding a workpiece, which is attached to the side of the rotating unit so as to move the workpiece forward and backward relative to the movement of the yoke. 2 The bending machine consists of a clamp type, a fixed type, a pair of arms that rotate toward and away from the folding line almost tangentially, an upper bending type fixed to the tip of one arm, and the other arm. Claim 1: This is a bending bender that consists of a lower bending die fixed to the tip, a connecting plate connecting both arms, and a common hydraulic cylinder, and performs upward or downward bending by rotating the arm. Panel former as described. 3 The bending machine is a patented wing bender that consists of a clamp type, a fixed type, and a movable type, and performs the bending process by rotating the movable type around the clamp tip of the clamp type and fixed type. A panel former according to claim 1. 4. The panel former according to claim 1, wherein the front table is constituted by a row of ball casters arranged on the left and right sides, excluding the space near the front center of the folding machine where the yoke advances. 5. The rotation unit includes a lifting mechanism provided at the tip of the upper arm of the yoke, an upper pad rotatably attached to the tip of the lifting mechanism, and a lower pad attached to the tip of the lower arm of the yoke at a position facing the upper pad. The panel former according to claim 1, further comprising a rotation mechanism provided on the side of the lower pad. 6. The pusher mechanism consists of a pair of sprockets attached near the tip of the lower arm of the yoke and at the rear end of the yoke, an endless chain running around both sprockets, a pusher member fixed to the upper chain, and a chain grip fixed to the lower chain. It consists of a cylinder attached to the rear end of the chain gripping member, which pushes the workpiece to the bending position at twice the speed of the movement of the yoke, and waits in a position to avoid interference with the workpiece when rotating the workpiece. A panel former according to claim 1.