JP2001179344A - Bending machine having cooling device for fed workpiece and cooling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling method capable of preventing at a comparatively low cost deterioration of accuracy of bending positioning that may possibly occur due to a slight dislocation of a holding part of a manipulator as a film adhesive is softened by a rise of a circumferential temperature to a certain degree when a workpiece having an abrasion-protective film on the surface thereof is fed into the bending machine. SOLUTION: The cooling method 15 comprises a means for cooling the pivotal point of the workpiece W by blowing air on a loading table 13 before the workpiece W having this kind of protective film is fed into the manipulator 12 of the bending machine 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending machine with a cooling device for a supply work, and more particularly to a bending machine provided with a cooling device for a work having a protective film on one surface thereof.

[0002]

2. Description of the Related Art For example, when a sheet metal panel work is supplied to a conventional bending machine (hereinafter simply referred to as a "bending machine") such as a press brake by a manipulator or the like as a work supply / positioning means. If the work is affixed with a protective film to prevent abrasion on one surface, when the ambient temperature rises to some extent, the film adhesive softens and the gripper of the manipulator moves slightly,
There was a possibility that the processing positioning accuracy was deteriorated.

[0003] This phenomenon will be described with reference to FIGS.
FIG. 7 is an enlarged cross-section of a work W having a protective film film on one surface (back side), and FIG. 8 is a schematic configuration diagram of a work holding portion of a manipulator.

In FIG. 7, W ₀ is a work body, 1 is a protective film on the back surface, 2 is an adhesive (glue) thereof, and W is the whole work. The work gripper 3 of the manipulator of FIG. 8 holds the work W between the upper / lower turrets 4/5, and the upper turret 4 moves the upper turret 4 up and down via the bearing 7 by the holding cylinder 6. .

[0005] The lower turret 5 is configured so that the work W held by a speed reducer 9 with a bearing (not shown) can be horizontally rotated in a desired direction around a C-axis by a servo motor 8. The manipulator is gripped by the gripper 3 and carried onto the work support table of the bending machine.

[0006]

However, when the ambient temperature of the work W with the protective film 1 becomes high to some extent, the glue of the adhesive 2 is softened, and the work W with the protective film 1 becomes, for example, a loading table (or gauging table) 13 ( (See FIG. 1 described later.) When the workpiece W is gripped by the manipulator 12 and is rotated to a predetermined position on the support table 11 of the bending machine 10 in a predetermined posture, the work W is displaced by softening of the glue. And the accuracy of position / posture may vary.

Conventionally, in order to solve the above problems, it has been necessary to control the temperature of the work in the factory, such as storing the work W in a place air-conditioned to a predetermined temperature range.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and does not require a high-cost work protection temperature control or the like as in the prior art, and can improve the positioning accuracy of a manipulator for a work with a protection film of this kind. It is an object of the present invention to provide a bending machine with a supply work cooling device capable of preventing a drop phenomenon.

[0009]

Accordingly, in the present invention, the above object is achieved by providing a bending machine or a method with a supply work cooling device described in any of the following items (1) to (5). What we are trying to achieve.

(1) In a bending machine for receiving a sheet-like work with a surface protection film by a work supply positioning means (hereinafter referred to as a manipulator) and bending the work, immediately before bending the work or in a bending process A bending machine with a supply work cooling device, comprising means for cooling at least a part of the work therein.

(2) The bending machine with a supply work cooling device according to (1), wherein the supply work cooling device is provided on a loading table immediately before the work is passed to the manipulator.

(3) A cooling means for directly cooling the work portion of the holding portion of the manipulator for holding the work between upper and lower portions and performing the positioning is provided. (1) A bending machine with a supply work cooling device according to (1).

(4) A cooling means is provided for cooling the holding member itself of the holding portion of the manipulator for holding the work between the upper and lower sides and performing the positioning. A bending machine with a supply work cooling device according to (1).

(5) In a bending machine for receiving and bending a sheet-like work provided with a surface protection film by a work supply positioning means, at least the work is bent immediately before or during the bending process. A bending method with a supply work cooling device, characterized in that a part is cooled.

[0015]

According to the configuration of the present invention as described above, the positioning accuracy of the work with the protective film by the manipulator can be maintained at a relatively low cost without the need for a high-cost work storage temperature management means or the like as in the prior art. it can.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on a plurality of embodiments with reference to the drawings.

[0017]

(Embodiment 1) FIG. 1 is a schematic perspective view of a bending machine with a supply work cooling device according to a first embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a bending (processing) machine;
Reference numeral 11 denotes a support table for the work. The work W with the protective film transported by the plurality of rollers 13a on the loading table 13 is a
And is supplied to a predetermined position / posture on the support table 11 for processing.

The first embodiment is characterized in that a bridge frame 14 is provided on a loading table 13 and a cooling means by an air blow 15 is provided at a substantially central portion thereof.
The configuration is such that low-temperature compressed air is injected from an air source (not shown) through a 5a to a portion to be gripped by the manipulator 12 to be cooled as shown in FIG.

As described above, the main part of the work W is cooled on the loading table 13 immediately before the bending machine 10 and is supplied onto the support table 11 by the manipulator 12, so that the gripping part 3 may be displaced. No positional accuracy can be ensured.

Further, since air is blown in the state shown in FIG. 2, there is also a cleaning effect of blowing off dust on the work W.

As a modification of this embodiment, an air blow 15 may be provided between the rollers 13a as shown by a dashed line in FIG. 2 to perform cooling from the lower surface.

It should be noted that the cooling means is not limited to the air blow 15 alone, but may be another type of spot cooler or the like.

(Embodiment 2) FIG. 3A shows a second embodiment of the present invention.
FIG. 3 is a schematic view of a cooling unit of the embodiment. When a plurality of work holding positions are present in a straight line or the like, it is needless to say that a desired plurality of air blows 15 can be provided on the bridge frame 14 on the loading table 13 as shown in the figure.

As shown in FIG. 3B, a plurality of air blows 15 may be provided on the lower surface of the loading table 13.

(Embodiment 3) In Embodiments 1 and 2, the work W is placed on the loading table 13 and the manipulator 12 is cooled before processing when it is loaded onto the support table 11. There is, but Figure 4
As shown in FIG. 1, the work W is carried into the support table 11 from the loading table 13 as it is, and when the manipulator 12 clamps the work W, the illustrated position provided on the upper turret 4 of the manipulator 12 is shown. At the beginning of the working process, a predetermined main part of the work is cooled by the air blow means 15.

(Embodiment 4) FIG. 5 shows that the air blow 15 is always continuously applied to the upper / lower turret 4 in place of the method of directly applying the air blow 15 to the work surface to cool the work surface in the first to third embodiments. / 5 itself and cooled before
FIG. 14 is an explanatory view of a fourth embodiment means for indirectly cooling a main part of the work W by gripping the workpiece W.

(Embodiment 5) FIG. 6 shows a case in which a cavity is provided inside each of the upper / lower turret 4a / 5a itself instead of the air blow cooling means of the upper / lower turret 4/5 shown in FIG. And the like, and the temperature of the coolant is maintained at a predetermined constant value, and both turrets 4a / 5a
FIG. 4 is an embodiment diagram configured to secure a low temperature of the present invention.

[0029]

As described above, according to the present invention,
A means for cooling the main part of the work on the loading table before the work with the protective film is passed to the manipulator (Examples 1 and 2), or a manipulator for clamping and vertically positioning this kind of work A means for directly cooling the work of the clamp portion of Example 3 (Example 3); or alternatively, a means for indirectly cooling the work of the clamp portion holding this type of work by the manipulator is provided (Example 3). 4, 5), it is possible to prevent a decrease in work positioning accuracy of the manipulator due to peeling of the film of the work with the protective film due to a rise in temperature at a relatively low cost.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a bending machine with a supply work cooling device according to a first embodiment.

FIG. 2 is an explanatory view of a main part of the cooling means of FIG. 1;

FIG. 3 is a schematic perspective view of a work cooling unit according to a second embodiment.

FIG. 4 is a schematic diagram of a cooling unit according to a third embodiment.

FIG. 5 is a schematic diagram of a cooling unit according to a fourth embodiment.

FIG. 6 is a schematic diagram of a cooling unit according to a fifth embodiment.

FIG. 7 is an enlarged cross-sectional view of a work having a surface protection film film.

FIG. 8 is a schematic diagram of a configuration of a work holding portion of the manipulator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Protective film 2 Adhesive (glue) 3 Manipulator gripping part 4/5 Upper / lower turret 6 Holding cylinder 7 Bearing 8 Servo motor 9 Reducer with bearing 10 Bending (machining) machine 11 Support table 12 Manipulator 13 Loading table (gauging) Table) 13a Roller 14, 14a Bridge frame 15 Air blow (cooling means) W Work (with protective film) W ₀ Work body

Claims (5)

[Claims] 1. A bending machine for receiving and bending a sheet-like work with a surface protection film by a work supply positioning means (hereinafter, referred to as a manipulator), wherein the work is immediately before bending or during a bending process. And a means for cooling at least a part of the work. 2. The bending machine with a supply work cooling device according to claim 1, wherein the supply work cooling device is provided on a loading table immediately before transferring the work to the manipulator. 3. A cooling means for directly cooling the work portion of the holding portion of the manipulator for holding the work between upper and lower portions and performing the positioning. 2. A bending machine with a supply work cooling device according to 1. 4. A cooling means for holding the work between upper and lower portions and cooling a holding member itself of the holding portion of the manipulator for performing the positioning. Bending machine with supply work cooling device. 5. A bending machine for receiving and bending a sheet-like work with a surface protection film by a work supply positioning means, wherein at least one of the works is formed immediately before bending the work or during the bending process. A bending method with a supply work cooling device, characterized by cooling a part.