JPH10137997A - Press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speedily transfer even a large work by preventing the work from being interfered with an upright at the time of transferring the work by a robot. SOLUTION: In this press machine for executing one action, at least, among carrying in and out of a work 8 and transferring between plural numbers of press bodies 1 by a robot 2 turning the arm 2b, at the time of turning the arm 2b while holding the work 8, an upright 4 is formed so that a corner part inside the upright 4 existing in the area being interfered with the work 8 is made in a pre-cut cross-section, Thus, since the work 8 is not interfered with the upright 4 even turning the arm 2b without largely extending and contracting the arm 2b of the robot 2 at the time of transferring the work 8 by the robot 2, the work 8 is transferred speedily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine having an improved upright sectional shape.

[0002]

2. Description of the Related Art Many conventional press machines employ a two-column structure in which uprights are arranged at four corners. When a panel-shaped work is formed by this press machine, it is necessary to carry in and out the work. However, recently, an arm-rotating robot has been often used for carrying in and out the work and transferring the work between a plurality of press bodies.

FIG. 1 shows a robot c disposed between press bodies a and b of a tandem press line composed of a plurality of press bodies a and b, and a workpiece d formed by the upstream press body a. And an example in which the robot c is conveyed to a press body b on the downstream side by a robot c.

In the press line as described above, when the forming of the work d is completed by the press body a on the upstream side, the arm e of the robot c which has been in the standby position so far turns, and the tip of the arm e forms the work. The completed work d is sucked, and then the arm e is turned to move the work d to the press body b on the downstream side.
If the work d is a panel, when the arm e is turned, the work d interferes with the upright f of the press body a at the hatched portion and cannot be carried out. For this reason, in the related art, once the formed work d is sucked at the tip of the arm e, the arm e is once bent largely upward at the joint g, and the turning radius from the turning center O to the tip of the arm is reduced. By turning the work, the work d is prevented from interfering with the upright f.

When the work d is carried into the press body b on the downstream side, the bent arm e is again greatly extended, and the work d is carried into the processing position of the press body b.

[0006]

Therefore, when the work d is transported from the press body a on the upstream side to the press body b on the downstream side, the operation of bending and extending the arm e takes a lot of time, and the transport speed is slow. And there was a problem that productivity of the press line did not increase. The present invention has been made in order to improve such a problem, and provides a press machine in which the cross-sectional shape of an upright is changed to reduce the interference area between the work and the aplite so that the work can be transferred at a high speed. It is intended to do so.

[0007]

According to the first aspect of the present invention, at least one of a work loading, a work unloading, and a transfer between a plurality of press bodies is performed by a robot whose arm pivots. In the press machine, the arm is formed such that when the arm turns while holding the work, a cross-sectional shape in which the inner corner portion of the upright in the region where the arm interferes with the work is cut off in advance.

With the above configuration, when the robot holds the work at the tip of the arm, turns the arm, and loads, unloads, or conveys the work, the robot can transfer the work without significantly bending and stretching the arm. High-speed transfer is made possible, thereby improving the operation rate of the press machine and the productivity associated therewith.

Further, since it is only necessary to form the aplite in a sectional shape in which the inner corner portion in the interference region of the aplite is cut off, it is easy and inexpensive to implement.

[0010] In order to achieve the above object, the invention according to claim 2 is such that the cut-out area of the inside corner of the upright has a size that does not interfere with the largest work that the press body can form.

With the above configuration, even when the press body transfers the largest work that can be formed, the work and the upright do not interfere with each other, so that a large work can be transferred at a high speed.

[0012]

Embodiments of the present invention will be described in detail with reference to the drawings shown in FIG. 2 is a plan view of a tandem press line in which a plurality of press machines are arranged on the same line. FIG. 3 is a front view of the tandem press line. In these figures, 1 is a press body, 2 is an upstream side of the press body 1 and an upstream side. an installation robotic between press body 1 ₁ and the downstream side press body 1 _2.

In the press body 1, uprights 4 are provided upright at four corners of a bed 3, and a slide drive mechanism (both not shown) for vertically moving a slide is accommodated between upper ends of the uprights 4. The crown 5 is mounted, and the bed 3 and the crown 5 are fastened by a tie rod 6 inserted into the upright 4.

A part of the upright 4 of the press main body 1 has an interference area (virtual area) of the corner 4a 'so that the work 8 and the inside corner 4a of the upright 4 do not interfere with each other when the work 8 is transferred by the robot 2. (A line portion) is cut out to have a substantially pentagonal cross section as shown in FIG. That is, the upright 4 of a normal press machine has a quadrangular cross-section and has four corners 4a. However, when the workpiece 8 is transferred using the robot 2, the upright 4 is moved in the turning direction A of the robot arm. A certain inner corner 4a 'interferes with the work 8 and hinders the transfer of the work 8 at a high speed. In the embodiment of the present invention, in order to solve such a problem, when the work 8 is conveyed, the inner corner portion 4 in the interference area of the work 8 is moved.
The upright 4 is formed in advance so as to have a substantially pentagonal cross section from which a 'has been cut off.

Meanwhile upstream and press body 1 ₁ of the press body 1 _1, 1 between the _2, the robot 2 that is installed in the press body 1 ₂ on the downstream side (not shown) have been employed general-purpose industrial robot The robot 2 has a multi-joint arm 2b that can rotate with respect to the robot main body 2a. At the tip of the arm 2b, an attachment 2c such as a vacuum cup is detachably attached, and the work 8 is attached by the attachment 2c. It can be held. In FIG. 2, reference numeral 9 denotes a safety guard for preventing a worker from accidentally entering the work area of the robot 2.

[0016] Next In operation, the press body 1 ₁ of the upstream of the robot 2 ₁ installed on the side of the attachment 2c
In the work 8 held it is conveyed into the press body 1 ₁ of the upstream side with pivoting of the arm 2b, in press body 1 ₁ forming the workpiece 8 is started. At this time, each press body 1 ₁ ,
Robot 2 ₂ installed between 1 ₂ Arm 2 is in standby position
b is waiting.

[0017] Then when the press body 1 ₁ forming the workpiece 8 has been completed, the arm 2b is press body that has been in the standby position 1
Turning to _one side, after the workpiece 8 has been completed of the molding attachment 2c is held, the work 8 to the next press body 1 ₂
The arm 2b is turned to transport. At this time arm 2
The upright 4 in the turning direction A of b has an inner corner 4
a ′ has a previously cut shape, so that the arm 4
The work 8 does not interfere with the upright 4 even when the arm 4b is turned without bending and stretching the joint 2d of the press body 1b.
_The work 8 can be carried out from ₁ .

Further work 8 which is carried out from the press body 1 ₁ is molded again been carried into the next press body 1 _2, inner corner portion 4a of the press body 1 ₂ uprights 4 '
Since the work 8 is cut in advance so as not to interfere with the work 8, the work 8 can be carried in without bending the arm 4 b even when the work 8 is carried in. As a result, the work 8 can be transferred at a high speed, so that the operation rate of the press body 1 can be improved and the productivity can be improved accordingly.

[0019] In the above embodiment, in consideration of the interference of the press body 1 _1, 1 robot 2 which is placed between ₂ and uprights 4, as previously excised shape a part of the corner portion 4a of uprights 4 However, it is a matter of course that the corners 4a where all the uprights 4 are expected to interfere with the robot 2 are cut off in advance.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a press machine configured to transfer a work by a conventional arm-swinging robot.

FIG. 2 is a plan view of a tandem press line in which press machines according to the embodiment of the present invention are arranged on the same line.

FIG. 3 is a front view of a tandem press line in which press machines according to the embodiment of the present invention are arranged on the same line.

FIG. 4 is an enlarged view in a B circle of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Press body 2 ... Robot 2b ... Arm 4 ... Upright 4a ... Corner 8 ... Work

Claims (2)

[Claims] An arm 2b holds a workpiece 8 in a press machine in which at least one of loading, unloading, and transporting between a plurality of press bodies 1 is performed by a robot 2 whose arm 2b rotates. A press machine characterized in that the upright 4 is formed so as to have a cross-sectional shape in which a corner 4a 'inside the upright 4 in a region where the upright 4 interferes with the work 8 when turning is performed. 2. The press machine according to claim 1, wherein the cutout area of the inner corner portion 4a 'of the upright 4 has a size that does not interfere with the largest work 8 that the press body 1 can form.