JPH11129098A - Metallic sheet panel manufacturing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic sheet panel manufacturing machine which has a simple and inexpensive structure and high safety for operators. SOLUTION: The metallic sheet panel manufacturing machine comprises a processing surface 1 for a sheet to be mechanical processed, a bending press 2 which is positioned in front of the processing surface 1 and equipped with a bending die, and a mechanical hand 4 movable towards the processing surface 1 for moving a sheet 5 during mechanical processing, so as to manufacture the metallic sheet panel being bent at the end periphery. A protective structure 6 surrounding the processing surface 1 inward is installed, and at least one opening 7 for operators to supply the sheet 5 to the processing surface 1 and approach the processing surface 1 for the purpose of removing the sheet from the processing surface, is installed in the protective structure 6. For preventing the operator from approaching the processing surface during mechanical processing, a prevention device is installed, to which at least one opening 7 is to be related. The prevention device can comprise a door 8, and a photo cell or the light scanning device such as a laser scanner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing machine for manufacturing a metal sheet panel having a bent edge, and more particularly to a manufacturing machine for a metal panel sheet which is generally called a panel machine.

[0002]

In particular, the present invention relates to a substantially rectangular metal sheet having one or more of its four edges bent once or more. For example, U.S. Pat.
No. 42898 is a machine for producing metal panel sheets of the type described in US Pat. This type of panel is widely used in, for example, metal cabinets, refrigerators, air conditioners, general shelves, and the like.

[0003] This known panel making machine comprises a working plane on which a metal sheet (panel) to be worked is placed, a bending press having a bending die and located in front of the working plane, and a machine to be machined during machining. It has a mechanical hand that can move with respect to the processing plane to move the sheet, and an automatic sheet feeder located on the side of the processing plane. This automatic sheet feeder transports the sheet from the feeder to the processing plane, and once the machining is completed After that, a moving platform for removing the sheet from the processing plane is provided.

[0004] The conveyor moving table receives a sheet from a feeder and places it on a processing plane. The mechanical hand grips approximately the center of the sheet, and the mechanical hand moves the sheet to position each side of the sheet to be bent in response to a bending press. Once the machining is completed,
The mechanical hand drops the sheet, and the carriage removes the sheet from the processing plane. Thus, all operations of the panel making machine, in particular the feeding of the sheet to be machined and the removal of the machined sheet, are automated.

[0005] Due to the feeder and the carriage, the machine has substantial access to the machining zone (ie, machining plane) from the outside during machining so as not to interfere with the operation of the carriage. An optical scanning device (laser scanner or photocell) is provided to meet the safety regulations stipulated in the current regulations, and when an operator or an object that is not recognized in any case approaches the processing zone, this panel manufacturing machine To stop. While such panel making machines are very effective, they have the disadvantage of being highly complex and, in fact, complicated and therefore expensive.

[0006]

SUMMARY OF THE INVENTION From the above,
The object of the present invention is that the structure is not complicated and therefore inexpensive,
An object of the present invention is to provide a machine for manufacturing a metal sheet panel with a bent edge, which can also satisfy the safety rules stipulated in the current regulations.

[0007]

In order to achieve the above object, a metal sheet panel manufacturing machine according to the present invention is provided with a working surface for a sheet to be machined and a bending die located in front of the working surface. A bending press and a mechanical hand capable of moving with respect to the processing surface to move the sheet during the machining, and a machine for manufacturing a metal sheet panel with a bent edge. Providing a surrounding protective structure, wherein the operator provides a sheet to the working surface and provides at least one opening in the protective structure to access the working surface to remove the sheet from the working surface; The invention is characterized in that the at least one opening is associated with each prevention means in order to prevent access to the processing plane.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a preferred embodiment of the present invention,
A door which can be selectively operated by an operator for feeding and removing sheets and which can be closed during machining of a sheet, and which is attached to a protective structure corresponding to one or more access openings. The door provided constitutes the above-described prevention means. The door or doors form a physical barrier that prevents access to the work plane when the machine is operating. Alternatively, the above-mentioned prevention means can be constituted by a photocell or an optical scanning device such as a laser scanner, and during machining, an unidentifiable object attempts to advance to the processing plane through one or more access doors. At any time, the operation of the machine is stopped by the optical scanning device.

The metal sheet panel manufacturing machine of the present invention has neither an automatic feeder nor a moving table for transporting sheets, and thus has a significantly lower complexity than known panel manufacturing machines. As a result, the machine for manufacturing the metal sheet panel of the present invention is inexpensive and can surround the working plane inside the physical protection structure. This protective structure is, for example, made of a metal sheet and comprises a barrier, which is preferably provided with a window, so that the machining zone of the metal sheet can be completely separated from the outside while the metal sheet is being machined. The feeding of the sheet to the processing plane and the removal of the sheet from the processing plane can be performed by the operator through one or more openings provided in the protection structure. Depending on the opening or openings, the safety device described above ensures operator safety. Embodiments of the present invention will be described with reference to the accompanying drawings.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, first and FIG. 2 show a panel manufacturing machine according to the present invention. The panel manufacturing machine comprises a processing plane 1 for a sheet 5 to be processed, a bending press 2 provided with a bending die (described in more detail later) located in front of the processing plane 1, and a sheet press 5 during processing. It has a mechanical hand 4 that can be moved with respect to the processing plane 1 for movement, and a protection structure 6. This protective structure 6 surrounds the working plane 1 with the mechanical hand 4 and the bending press 2,
It consists of a sheet, preferably having a window. In this example, two openings 7 for approaching the processing zone are provided on both sides of the processing plane in the protection structure 6, whereby the operator introduces the sheet 5 to be processed into the processing plane 1 and the processing is started. Once completed,
The sheet can be removed.

In the example shown, each access door 8 is associated with this access opening, and is hinged to a support frame (not shown for simplicity) of the protection structure 6, as shown in an enlarged view in FIG.
These allow the doors to rotate about their respective horizontal axes. In order to facilitate opening and closing of the door 8, it is preferable to provide a normal gas cylinder (not shown).

In the embodiment shown, the protection structure 6 has two openings for accessing the working plane, so that the working plane can be accessed from both sides. However, a single access opening may be provided. Further details regarding the structure of the bending press 2 and the interaction of the mechanical hand 4 and the actuation are shown in FIGS. 4 and 5, which will now be described in more detail. In these drawings, the protection structure 6 is not shown for simplicity.

As is known, the mechanical hand 4 comprises a carriage 9 adapted as an "arch press". The moving table 9 can move with respect to the processing plane through the vertical slit 3 of the processing plane on the linear horizontal guide section 10 supported by the bed 11 resting on the floor. The straight horizontal guide 10 extends perpendicularly to the front of the bending press 2. The fluid machine cylinder 50 moves the moving table 9 along the guide 10 in a direction approaching and leaving the bending press 2. The moving table 9 has a lower jaw 13 and an upper jaw 1 which are coaxially arranged vertically.
And 4 having a hydraulic vise 12. As shown in FIG. 4, these jaws have flat, horizontal opposing walls suitable for clamping the sheet to be processed therebetween.

A lower jaw 13 is fixed to an upper end of a vertical shaft 15 which can be rotated by a rotating device 16 attached to a lower portion of the moving table 9. This rotating device provides 90 ° and 180 ° angular movement of the shaft 15 and the lower jaw 13 in one direction and in the opposite direction. The upper jaw 14 to the vertical axis
7 is fixed to the lower end. The vertical shaft 17 is held so as to idle by a bracket arm 51 which is vertically slidably held at the upper end of the moving table 9. The bracket arm, and thus the upper jaw 14, is moved up and down by a hydromechanical cylinder (not shown), and the sheet 5 to be processed is clamped between the lower jaw 13 and the upper jaw 14, respectively, and released. The vertical axis 17 needs to be able to idle around its own axis. This is to prevent the rotation of the sheet 5 by the rotating device 16 since the upper jaw 14 cooperates with the lower jaw 13 to clamp the sheet 5.

Further, the mechanical hand 4 is provided with thrust means 19
The thrust means 19 is moved together with the carriage 9 as a whole, as shown in two different operating positions in FIGS. It can slide in the provided sliding body. When the thrust means 19 is in the rest position, this position substantially corresponds to the throat of the arch press 9, but by moving forward along the slide towards the bending press 2 under the action of the cylinder 52, The thrusting means 19 abuts against the rear edge of the sheet to be processed and then provides for automatic correct positioning, as will be described in more detail.

The bending press 2 comprises a support structure, which has a substantially C-shaped cross section and comprises a lower wing 21 and an upper wing 22. The lower wing 21 is stationary on the floor, and the upper wing 22 is the lower wing 21.
Lower wing 21 corresponding to the flange 23 at the rear
And can rotate about a horizontal axis A. The upper wing 22 is rotated around the axis A by the cylinder piston unit 24. Upper wing 22
At least one vertical rod 25 (shown diagrammatically in dashed lines) which acts as a guide for the movement of A vertical support 26 is fixed in front of the lower wing 21, and a flat and horizontal free upper surface of the vertical support 26 is at the same height as the processing plane 1 to form a lower material holder.
An upper material holder 27 is fixed in front of the upper wing 22, and the upper material holder 27 extends vertically toward the bottom,
The flat free lower surface of the upper material holder 27 cooperates properly with the upper surface of the lower material holder so that the sheet to be processed can be clamped near the edge to be bent.

In a space formed between the upper wing 22 and the lower wing 21, a bending blade holder 28 having a substantially "C" -shaped cross section is accommodated. The blade holder 28 has an upper arm 29 and a lower arm 30 projecting toward the front of the bending press 2. While fixing the lower bending blade 34 to the end of the lower arm 30,
The upper bending blade 35 is fixed to the upper arm 29. The rear of the blade holder 28 is hinged to the torsion bar 31 so that it can rotate about the axis C. Torsion bar 31
Can also rotate about the horizontal axis B under the action of the fluid machine cylinder. In this hydraulic machine cylinder, only the rod 32 is shown by a chain line in the drawing. The fluid machine cylinder (the rod 33 of which is shown by a dashed line in the diagram) has an axis C
The blade holder 28 around. By combining the rotation of the torsion bar 31 about its own axis B, which determines the position of the rotation axis C of the blade holder 28, with the rotation of the blade holder 28 about the axis C, the bending blades 34, 35 Can perform a number of different movements, thereby allowing bending at different angles upward and downward.

A known reference support block 36 is mounted in front of the support 26. The reference support block 36 has a flat horizontal upper surface 37 at the same height as the processing plane 1, and the reference element 3 shown in FIGS.
8 is installed. The block 36 is movable in a direction perpendicular to the front surface of the bending press 2 so as to be able to approach and separate from the bending press 2. In addition, during processing of the sheet, the reference element 38, which may be retracted into the block 36, can protrude and thus protrude from the surface 37. Also, a plurality of these reference elements can move in a direction parallel to the front surface of the bending press, and can move closer to or away from each other by the reference elements.

As shown in FIG. 5, each reference element 38 (a retracted rest position is indicated by a solid line, and a protruding operating position is indicated by a chain line) is rotatably supported by a moving table 61. Each moving table 61 is attached to the endless screw 39 extending parallel to the front surface of the bending press 2. The screw 39 is rotated by a pulley 62 rotated by a motor 60 via a belt 63. Therefore, the moving table 61 can move in a direction parallel to the front surface of the bending press. A rod 64 extends parallel to the endless screw 39 and forms the axis of rotation of the reference element 38. The vertical rod 66 of the piston cylinder unit 65 is pivotally connected to the reference element 38, and the cylinder is pivotally connected to the reference support block 36. The piston cylinder unit 65 rotates the reference element 38 around the rod 64, 38 is the reference support block 36
Protrude from and retract.

The operation of the panel manufacturing machine shown here will now be described. First, the operator takes the sheet to be processed,
The door 8 is opened to reach the processing plane 1, and the sheet to be processed is positioned substantially at the center of the processing plane. Next, the operator closes the door 8 and operates the panel manufacturing machine. the first,
The mechanical hand 4 is located away from the bending press 2 and the upper jaw 14 is raised, but the mechanical hand 4 moves toward the bending press 2. Meanwhile, since the thrust means 9 is operated by the fluid machine cylinder 52, the thrust means 19 moves along the slide toward the front surface of the bending press 2 and abuts against the rear edge of the sheet to be processed. Press towards bending press.

At the same time, the two retractable reference elements 38 project and the leading edge of the sheet pressed by the thrust means 19 abuts against these reference elements 38. This configuration of the reference element 38 can center the sheet to be processed in a direction parallel to the front of the bending press. This may or may not involve the sheet having sheared corners. Since the reference element 38 can move in a direction parallel to the front face of the bending press, it is possible to center sheets of various sizes. Thus, the operator does not need to be concerned with precisely positioning the sheet on the working plane.

At this point, since the reference element 38 is retracted and the thrust means 19 returns to its rest position, there will be no obstacle during the next machining process. The upper jaw 14 descends and cooperates with the lower jaw 13 to hold the sheet in a substantially central position. Thus, the mechanical hand moves the sheet forward toward the bending press. The upper wing 22 of the bending press is raised, so that the upper blank holder is far enough away from the lower blank holder 26 to allow the sheet to pass. Once the sheet is introduced into the bending press, the cylinder 24 lowers the upper wing 22 so that the edge of the sheet to be machined which protrudes inside the bending press is transferred by the upper blank holder 27 to the lower blank holder 26. Press.

At this point, a plurality of cylinders (the rods 32 and 33 of which are shown in FIG. 4) are used to hold the blade holder 28
Move. As a result, the bending blades 34, 35 of the blade holder 28 cooperate with the blade holders 26, 27 to bend the edge of the sheet. Once the edges of the sheet have been bent as desired, the upper wing 2
2 is lifted, and the sheet is released from the holding of the upper material holder 27. Return the mechanical hand 4 and remove the sheet from the bending press. If it is necessary to bend the other edge of the sheet, the rotator 16 will rotate the sheet 90 ° or 1 °.
Rotate 80 °. When the sheet is rotated as desired, the mechanical hand moves forward again, bringing the edge of the sheet to be machined into the bending press and repeating the above operation.

When the processing of the sheet is completed, the operator stops the machine, opens the door 8, and removes the sheet from the processing plane. The operator takes a new sheet, positions the sheet on the processing plane, closes the door, and operates the machine.

[Brief description of the drawings]

FIG. 1 is a diagrammatic perspective view of a panel manufacturing machine of the present invention surrounded by a protective structure.

FIG. 2 is a schematic perspective view similar to FIG. 1 with a protective structure partially removed.

FIG. 3 shows an enlarged detail of a door for closing an access opening of the protection structure of the panel manufacturing machine of FIG.

FIG. 4 is a vertical longitudinal sectional view of the panel manufacturing machine of FIG.

FIG. 5 shows in detail the elements for centering the sheet on the working plane, together with the respective movement mechanisms.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Working plane 2 Bending press 3 Vertical slit 4 Mechanical hand 5 Seat 6 Protective structure 7 Opening 8 Door 9 Moving table 10 Straight horizontal guide part 12 Hydraulic vise 13 Lower jaw 14 Upper jaw 15, 17 Vertical axis 16 Rotating device 19 Thrust Means 21 Lower wing 22 Upper wing 23 Flange 24 Cylinder piston unit 25 Vertical rod 26 Vertical support 27 Upper material holder 28 Bending blade holder 29 Upper arm 30 Lower arm 31 Torsion bar 32, 33 Rod 34 Lower bending blade 35 Upper bending blade 36 Reference support block 37 Flat horizontal upper surface 38 Reference element 39 Endless screw 51 Bracket arm 52 Fluid machine cylinder 61 Moving table 62 Pulley 63 Belt 64 Rod 65 Piston cylinder unit 66 Vertical rod

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Gianfranco Venturini Verona, Italy 37044 Cologna Veneta Via Predicale 66 / D

Claims (7)

[Claims] 1. A working surface (1) for the sheet to be machined, a bending press (2) located in front of the working surface and provided with bending dies, and moving the sheet (5) during machining. A mechanical hand (4) movable with respect to the working surface for producing a metal sheet panel with a bent edge, provided with a protective structure (6) substantially surrounding the working surface. Providing at least one opening (7) in the protective structure (6) for the operator to feed a sheet to the working surface and to access the working surface to remove the sheet from the working surface; A metal sheet panel manufacturing machine, wherein the at least one opening (7) is associated with each prevention means (8) to prevent access to the processing plane. 2. Introducing the sheet (5) before machining,
After machining, it can be opened by an operator to remove the sheet (5), can be closed during machining to prevent access to the working plane, and can be closed by a door associated with the opening (7). 2. The manufacturing machine according to claim 1, wherein said prevention means (8) for preventing approach to said processing plane (1) is constituted. 3. The manufacturing method according to claim 2, wherein the door (8) is attached to the protective structure (6) corresponding to the opening (7) so as to be rotatable about a horizontal axis. machine. 4. A sheet positioning means (19, 38) for automatically positioning a sheet (5) to be machined after the sheet (5) to be machined has been introduced onto said working plane (1) by an operator. The manufacturing machine according to any one of the preceding claims, wherein: 5. A process in which the upper surface of the processing plane (1) is receded from the upper surface of the processing plane (1), and projects from the upper surface of the processing plane so as to engage with a front edge of the panel during the positioning of the sheet (5). A retractable reference element (38),
Movable thrust means (19) engaging the trailing edge of the sheet so as to press the leading edge of the sheet against the reference element;
The manufacturing machine according to claim 4, characterized in that the sheet positioning means (19, 38) are provided. 6. A pair of said retractable reference elements (38).
6. The manufacturing machine according to claim 5, comprising: 7. A vice (12) which can move the mechanical hand in a direction approaching and leaving the bending press (2) and clamp the sheet (5) to be machined substantially at a center position thereof. A machine according to any of the preceding claims, characterized in that it comprises a rotating device (16) for rotating the sheet (5) in the working plane (1).