JP2956424B2 - Panel conveying method in press working line, mold device used in press working line, and panel holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel conveying method in a press working line for performing press working of, for example, an automobile body panel, a die apparatus used in the press working line, and a panel holding apparatus. In order to supply the panel to the next process press, the panel is turned upside down, and the panel is directly fed to the next process press. Related to the device.

[0002]

2. Description of the Related Art Conventionally, a press working line for forming a body panel of an automobile, for example, has a structure in which a plurality of press machines are arranged at appropriate intervals, and a transfer device for transferring a panel between the press machines. This is a configuration in which, for example, an industrial robot is arranged.

[0003] In the above configuration, the upper and lower dies mounted on the press machine are pressed to cooperate, and the upper surface of the panel located on the lower die is suctioned by the suction part of the hand part of the transfer robot. Thereafter, the panel is transported to the next step.

[0004]

As described above, the upper surface of the panel is sucked by the suction portion of the hand portion of the transfer robot, and when the panel is transferred to the next step, the panel is not simply transferred, but is also transferred to the panel. In some cases, the sheet may be turned upside down (upside down) and transported to the next step.

As described above, when a panel is turned upside down and transported to the next process, it is impossible with one transport robot, so that two transport robots are used.

That is, in this configuration, the upper surface (one side surface) of the panel is sucked and held by the first transfer robot,
The panel is turned upside down and supplied to the second transfer robot. The second transport robot is turned upside down and sucks the other side surface (the lower surface in the initial state) of the panel held by the first transport robot, and then supplies the panel as it is to the next process. Therefore, the panel is supplied to the next step after being turned upside down.

As described above, in a configuration in which two transport robots are used as a configuration in which the panel is turned upside down and transported to the next process, as a matter of course, compared to a case in which one transport robot is provided. There is a problem that equipment costs increase.

In addition, there is a problem that the tact time becomes long because there is a panel transfer process between the two transfer robots.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. The present invention provides a method of transporting a panel in a press working line, and (a) mounting a panel on a press machine. A step of pressing the panel by cooperation of the upper and lower dies, holding the peripheral portion of the panel by a panel holding device provided in the upper die, and lifting the upper die integrally with the slider of the press machine. (B) positioning the hand portion of the transfer device below the panel raised integrally with the upper mold, and then holding the lower surface of the panel with the hand portion; and (c) transferring (C) releasing the holding of the panel by the panel holding device after holding the lower surface of the panel by the hand portion of the device; and (d) pressing the panel held by the hand portion of the transfer device in the next step by the transfer device. What A step of inverting the panel by inverting the hand unit when transferring, and (e) setting the inverted panel in a lower mold mounted on a press machine in the next step. It is a transportation method.

Further, the mold apparatus provided for the conveying method of the present invention comprises upper and lower molds for pressing a plate-shaped panel, and press working is performed by cooperation of the upper and lower molds. The upper die is provided with a panel holding device for holding the peripheral portion of the panel after the operation.

Further, the panel holding device is provided with a pressing arm for pressing and fixing the peripheral edge of the panel to the upper die outside the bead forming portion formed on the upper die in a swingable manner. Interference with the pressing arm when the pressing arm presses and fixes the peripheral portion of the panel to the upper die outside the bead forming portion formed on the lower die to cooperate with the bead forming portion of the die. To avoid the interference.

[0012]

According to the above structure, in the method of the present invention, after the panel is pressed by the upper and lower dies, when the upper die is raised, the peripheral portion of the processed panel is held by the panel holding device. It rises while holding it. Then, when the lower surface of the panel held by the upper mold is sucked by the hand unit of the transfer device and transported to the next process, the panel is turned upside down by inverting the hand unit. It is turned over, and in that state, it is directly set in the lower mold of the next process.

Therefore, when an industrial robot or the like is used as a transfer device, only one robot is required.

Further, with the above configuration, in the die apparatus, after the panel is pressed by the cooperation of the upper and lower dies, when the upper die is to be raised, the panel holding device is operated. Holds the edge of the processed panel.

Therefore, the upper die can be lifted while holding the processed panel, and the lower surface of the processed panel held by the upper die can be easily held by the hand portion of the transfer device. The panel can be turned upside down by the hand unit.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In general, a press working line is a multi-axis industrial machine in which a large number of press machines are linearly arranged at appropriate intervals, and a suction unit such as a vacuum cup is provided in a hand unit between the press machines. The robot is arranged as a panel transfer device. Therefore, in the present embodiment, the case of a press line in which a large number of press machines are arranged at appropriate intervals should be described. However, in order to facilitate understanding, the panel is turned upside down (upside down) during transport of the panel.
Here, only the necessary process steps will be described.

Referring now to FIG. 1, FIG. 1 illustrates a press machine 1 and a press machine 3 in a press machine line, and illustrates a part of the press machine line in which others are omitted. Between the press machine 1 and the press machine 3, a transfer device 5 for transferring the panel B after the press working in the press machine 1 to the press machine 3 is arranged.

The transfer device 5 is composed of an articulated robot such as an industrial robot, and its hand 7 has a holding portion 9 for holding the panel B.
It has. The configuration of the holding section 9 includes a panel B
It is possible to appropriately configure such as a configuration for clamping a part of the panel B, a configuration for magnetically attaching the panel B, or a configuration for adsorbing the panel B in accordance with the material, shape, and the like of the panel B. It is exemplified by a configuration having a number of vacuum cups.

The press machine 1 has the same configuration as a general press machine. A lower mold 11 is detachably mounted on a bolster, and a panel B is cooperated with the lower mold 11. The upper die 13 for performing the press working is detachably mounted on a slider (not shown) provided in the press machine 1 so as to be vertically movable.

The upper mold 13 is provided with a punch 13P for forming a panel B in cooperation with the lower mold 11, and a panel B is formed on the upper surface of the lower mold 11 prior to the forming of the panel B. And a panel holder 13H which presses the panel holder 13H. The panel holder 13H surrounds the punch 13P, and the lower die 11 is provided on the lower surface of the panel holder 13H in order to suppress the occurrence of wrinkles at the time of forming the panel B.
A convex bead forming portion 13B cooperating with the annular groove-shaped bead forming portion 11B formed on the upper surface is formed in an annular shape.

Further, a panel holding device for holding the panel B, which has been subjected to press working in cooperation with the upper and lower dies 13, 11 on the lower surface of the upper die 13, is provided at a plurality of positions of the panel holder 13H. 15 are attached.

As shown in FIGS. 2 and 3, the panel holding device 15 presses the peripheral edge of the panel B against the lower surface of the panel holder 13H outside the bead forming portion 13B formed on the lower surface of the panel holder 13H. Pressing arm 1
7 is provided so as to be vertically movable.

More specifically, the bell crank-shaped pressing arm 17 is pivotally mounted on a bracket 19 attached to the side surface of the panel holder 13H via a pivot 21 so as to be vertically swingable. At one end of the 17, press for pressing and fixing said panel B to the lower surface of the panel holder 13H
A pressing pin 23 is attached as a pressure part .

A hydraulic cylinder 27 as an actuator for vertically moving the pressing arm 17 is swingably supported on the bracket 19 via a pillow block 25. The distal end of a piston rod 29 provided to be able to reciprocate and the other end of the pressing arm 17 are pivotally connected via a pin 31.

Accordingly, by appropriately reciprocating the piston rod 29 of the fluid pressure cylinder 27, the panel B can be pressed and fixed to the lower surface of the panel holder 13H, and the fixing can be released.

As described above, the panel B is held by the panel holder 13 by the pressing arm 17 of the panel holding device 15.
The time for pressing and fixing to the lower surface of the H is determined by the upper and lower dies 13, 11
Immediately after forming the panel B, the upper and lower dies 13, 11 are engaged.

Therefore, in order to avoid interference between the pressing arm 17 and the lower mold 11 in the panel holding device 15, the lower mold 11 has, for example, a notch or groove-shaped interference avoiding portion 33 (FIG. 1) so that the distal end of the pressing arm 17 can pass through the interference avoiding portion 33.

The press machine 3 processes the panel B pressed by the press machine 1 in the preceding process in the next process. Therefore, the press machine 3 includes upper and lower dies 35 and 37 for performing the processing in the next step. Since this type of press machine is known, a detailed description of the press machine 3 is omitted.

In the above configuration, the press machine 1
After performing an appropriate press working on the panel B in the above, the panel B is transferred to the press machine 3 in the next process by the transfer device 5.
First, the panel B is received from the press machine 1 to the holding unit 9 of the hand unit 7 of the transfer device 5 until the panel B is set in the lower die 37 of the press machine 3 in the next process. The operation of the transfer device (robot) 5 is taught.

In the teaching of the transfer device 5, when the panel B is transferred from the press machine 1 to the press machine 3 in the next step, the operation of turning the hand unit 7 upside down is previously taught.

In the above configuration, when the slide in the press machine 1 is at the top dead center and the space between the upper and lower molds 13 and 11 is largely open as shown in FIG. The panel B is set on the lower mold 11 by the loading device.

After setting the panel B on the lower mold 11 as described above, the slide of the press machine 1 is lowered, and the panel B is formed by the upper mold 13 and the lower mold 11. At this time, the punch 1 in the upper die 13
Immediately before 3P starts forming the panel B, the upper mold 1
The panel holder 13H at 3 presses the peripheral portion of the panel B against the upper surface of the lower mold 11 before the punch P.

As described above, when the panel holder 13H presses the panel B against the upper surface of the lower die 11, the bead forming portions 13B and 11B engage with each other to perform bead forming near the peripheral portion of the panel B. The generation of wrinkles at the time of molding by the engagement between the punch 13P and the lower mold 11 is prevented.

After the panel B is formed by the cooperation of the upper and lower molds 13 and 11 as described above, before the slide is raised, the panel holding device 15 provided in the upper mold 13 is moved.
When the piston rod 29 of the fluid pressure cylinder 27 is operated to protrude, the pressing arm 17 is rotated about the pivot 21, and the tip end of the pressing arm 17 passes through the interference avoiding portion 33 provided in the lower mold 11, and The peripheral portion of the panel B is fixed to the panel holder 13H by the pressing pin 23 provided at the tip end.
(See FIGS. 3 and 4B).

Thereafter, when the slide in the press machine 1 is raised, the panel B after press working is raised while being held on the lower surface of the upper mold 13 as shown in FIG.

As described above, when the upper mold 13 is lifted while holding the processed panel B on the lower surface of the upper mold 13 and stops at the top dead center, the hand unit 7 of the transfer device 5
Is made to enter the lower side of the panel B, and the lower surface of the panel B is suction-held by the holding portion 9 provided in the hand portion 7 (see FIG. 1).

After the lower surface of the panel B is sucked and held by the holding unit 9 of the hand unit 7 of the transport device 5, the panel holding device 15
, The piston rod 29 of the fluid pressure cylinder 27 is retracted to release the pressing and fixing of the panel B by the holding arm 17.

Thereafter, the transport device 5 is operated in accordance with the teaching operation taught in advance, and the panel B held by the holding portion 9 of the hand portion 7 is set on the lower die 37 of the press machine 3 in the next step.

When the panel B is transported by the transport unit 5, the hand unit 7 is turned upside down and the panel B is turned upside down (upside down), so that the panel B is transferred from the press machine 1 to the press machine 3. At this time, the panel B is transported upside down.

That is, according to the present embodiment, when the panel B is transported from one press machine 1 to the press machine 3 in the next process, the panel B is transported upside down by one transport device 5. Press machine 3 in the next process
The panel B can be directly set on the lower mold 37 in the above.

Therefore, the panel B can be transported quickly, and the panel can be knocked against the lower mold 37 when the panel B is set on the lower mold 37 in the press machine 3 in the next process. And the panel B can be set accurately without causing any misalignment of the panel B with respect to the lower mold 37.
Press working in the next step can be performed accurately.

By the way, the present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. For example,
The configuration of the panel holding device 15 may be a configuration in which the peripheral portion of the panel is magnetically attached to the upper mold using an electromagnet, or a configuration in which the peripheral portion of the panel is attracted to the upper mold using a vacuum cup device. It is.

[0043]

As will be understood from the above description of the embodiment, according to the present invention, when the panel is transported from the press machine in the previous process to the press machine in the next process, the lower surface of the panel after the press working is performed. In order to hold the panel, the panel is held on the lower surface of the upper die in the press machine in the previous process and rises integrally. It can be easily and quickly performed by only one transfer device, and the overall configuration can be simplified. Further, the positioning of the panel with respect to the lower mold in the press machine in the next step can be performed accurately, and the processing in the next step can be performed accurately.

[Brief description of the drawings]

FIG. 1 is an operation explanatory view showing a part of a press working line showing an embodiment according to the present invention.

FIG. 2 is an explanatory front view illustrating a panel holding device.

FIG. 3 is an explanatory diagram showing a panel holding state by the panel holding device.

FIG. 4 is an operation explanatory view showing an operation state of upper and lower molds showing an example of forming a panel;

[Explanation of symbols]

 1,3 Press machine 5 Transfer device 7 Hand unit 11 Lower die 13 Upper die 15 Panel holding device 17 Press arm 33 Interference avoiding unit

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshikazu Hirayama 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (56) References Japanese Utility Model 1-96231 (JP, U) 30771 (JP, B2) JP-B-53-18749 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21D 43/05 B21D 43/00 B21D 43/18 B25J 9/04 B25J 15/06

Claims (4)

(57) [Claims] 1. A method for transporting panels in a press working line, comprising the following steps: (a) The panel is pressed by the cooperation of the upper and lower dies mounted on the press machine, and the peripheral part of the panel is held by the panel holding device provided on the upper mold to be integrated with the slider of the press machine. Raising the upper mold, (b) after positioning the hand unit of the transfer device below the panel raised integrally with the upper mold, holding the lower surface of the panel with the hand unit. (C) a step of releasing the holding of the panel by the panel holding device after holding the lower surface of the panel by the hand unit of the transfer device, and (d) the panel held by the hand unit of the transfer device by the transfer device. A step of inverting the panel by inverting the hand part when transferring to a press machine in the next step; (e) setting the inverted panel in a lower mold attached to the press machine in the next step Process 2. An upper and lower panel for press working a plate-shaped panel.
A mold device consisting of molds, and the cooperation of upper and lower molds
Panel for holding the panel after pressing
A holding device is provided in the upper mold, and the panel holding device swings a pressing arm for pressing and fixing the peripheral edge of the panel to the upper mold outside the bead forming portion formed in the upper mold. When the outer peripheral portion of the panel is pressed and fixed to the upper die by the pressing arm outside the bead forming portion formed on the lower die to cooperate with the bead forming portion of the upper die. it characterized by being obtained by forming the interference avoiding portion for avoiding interference with the pressing arm
Mold apparatus which is used to up less processing line. 3. A bracket attached to a panel holder,
A panel holding device, wherein a pressing arm capable of pressing and fixing a panel to a lower surface of the panel holder with a tip end portion is provided so as to be vertically movable, and an actuator for vertically moving the pressing arm is provided on the bracket. . 4. Mounting to a panel holder in a mold apparatus
Pressing arm with a pressing section at one end on a free bracket
The arm is pivotally mounted up and down so that it can swing up and down.
Fluid swingably supported by the bracket to swing
Press the distal end of the piston rod provided in the pressure cylinder
A panel pivotally connected to the other end of the pressure arm.
Holding device.