JPH0655218A - Crowning device for bender - Google Patents

Abstract

PURPOSE:To simplify a constitution, to remove the dispersion of bending angle and to improve the working precision by giving a required amount of swell to correct the deflection of the central part of an upper or a lower table provided at a notch part and detecting and adjusting this amount of swell. CONSTITUTION:The notch part 13 is provided on the central part of either an upper or a lower table 5, 3 and the required amount of swell is given to this notch part 13 to correct the deflection at the central part of either the upper or the lower table 5, 3. A means to detect, adjust and swell this amount of swell is provided and this swelling means is composed of a ball screw 16, a servo motor 17 adjusting this ball screw 16 freely vertically and provided with plural ball screws 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a fixed lower table supported by side frames on both sides, and an upper table which is provided on the upper side of both side frames and can be vertically moved and pressed against the lower table. Browsing crowning equipment.

[0002]

2. Description of the Related Art Conventionally, when a bender pressurizes the side frames on both sides, the center portions of the upper table and the lower table are bent, and the bending angle of the lower mold is unevenly arranged between the upper and lower tables. There was a problem that it would occur. To correct this bending, wedges and round machines have been adopted.

[0003]

By the way, when a large number of wedges or round machines are adopted, the mechanism becomes complicated,
There is a problem that the adjustment requires skill and the handling is difficult.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bender crowning device which has a simplified structure, is easy to adjust, eliminates variations in bending angle, and improves machining accuracy in order to improve the above problems. To do.

[0005]

In order to achieve the above object, according to the present invention, either the upper or lower table is supported and fixed to the side frames on both sides, and the other table is vertically moved with respect to the fixed table. In a bender that can be moved and pressed, a notch provided in the center of either the upper or lower table and a bend in the center of the upper or lower table provided in the notch are corrected. The crowning device of the vendor is characterized in that the crowning device is provided with a raising means for applying a required raising amount and detecting and adjusting the raising amount.

According to another aspect of the present invention, the raising means comprises a ball screw and a servomotor for adjusting the ball screw so that the ball screw can be moved up and down.

According to still another aspect of the present invention,
A plurality of ball screws are provided so that the amount of heaps is not concentrated in the central portion and dispersed.

[0008]

By using the bender crowning device of the present invention, a notch is provided at the center of either the upper or lower table, and the notch is provided at the center of either the upper or lower table. Providing a required amount of rise to correct the deflection, and providing a raising means for detecting and adjusting the amount of rise, and the raising means is composed of a ball screw and a servomotor for adjusting the ball screw so that the ball screw can be raised and lowered. This simplifies the configuration, facilitates its adjustment, eliminates variations in the bending angle, and improves processing accuracy.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a front view of an embodiment of the crowning device according to the present invention, and FIG. 2 is a side view of FIG. 1 and 2, the bender 1 mainly includes a lower table 3, an upper table 5 and side frames 7 on both sides. The lower table 3 is fixed and supported by the side frames 7 on both sides.

One end of the upper table 3 is connected to a pressure device (not shown) provided on both side frames 7, and the other end is pivotally supported by brackets 11 provided on both sides. It can be moved to press the lower table 3.

In order to press both ends of the lower table 3 at both ends of the upper table 5 as described above, the central portions of the upper and lower tables 5 and 3 are bent as shown by a chain line a as shown in FIG. However, in this embodiment, a cutout hole 13 is provided in the center of the lower table 3, and the cutout hole 13 is stretched from the inside as shown by the dotted line so that the lower part is shown by the dotted line b. The central portion of the table 3 rises, and the upper table 5 can be easily bent.
Variations in bending angle are reduced, and processing accuracy can be improved.

The crowning device 15 of the present invention includes a ball screw 16 provided in the notch hole 13 as a raising means and a ball screw 1 via a cyclo gear reducer 19.
Servo motor 17 for giving rotation to 6 and servo motor 1
An encoder 21 is provided which is a swelling amount detection sensor for detecting the rotation amount of No. 7.

Therefore, it becomes possible to handle the amount of rise (crowning amount) in the central portion of the cutout hole 13 in a digital amount, and the arithmetic processing unit (not shown) performs a numerical calculation process to finely adjust the crowning amount. Is easily achieved and the deflection of the lower table 3 is corrected.

Next, FIG. 4 shows a schematic block diagram of another embodiment of the present invention. In the figure, the cutout hole 2 in the lower table 3
3, the width dimension of the cutout hole 13 shown in FIG. 3 is enlarged so that a plurality of ball screws 16 are accommodated, and in the present embodiment, two are accommodated.
Each of them is connected to the servomotor 17 (FIG. 2) via the speed reducer 19. Therefore, the cutout hole 13 shown in FIG.
The amount of swelling (crowning amount) concentrated in the center of is dispersed, and a uniform bending angle is obtained.

Next, FIG. 5 shows a schematic block diagram of still another embodiment of the present invention. In the drawing, both ends of the upward curved support body 27 are coupled to the cutout portion 25 of the lower table 3 by coupling pins 29. In the space 31 between the cutout portion 25 and the upward curved support body 27, the ball screw 16
, And in the present embodiment, two are accommodated, and each is connected to the servomotor 17 (FIG. 2) via the speed reducer 19.

Next, FIG. 6 is a schematic block diagram of still another embodiment of the present invention. In the figure, the worm reducer 33 is
The worm wheel 37 meshing with the worm gear 35 fixed to the servomotor 17 transmits the decelerated rotation to the ball screw nut 39 of the ball screw 16 so that the ball screw 16 can move up and down and the deflection of the lower table 3 is corrected.

As described above, the lower table 3 is provided with the cutout holes 13 and 23 or the cutout portion 25, the cutout holes 13 and 23 or the cutout portion 25 is provided with a raising means, and the raising amount is detected. As a result, the amount of build-up is finely adjusted with high precision, the bending angle of the bender 1 is made uniform, and an extremely high crowning effect is achieved.

The present invention is not limited to the above embodiment, but can be implemented in other modes by making appropriate design changes. For example, in the present embodiment, the upper table ( Although the crowning device provided on the lower table of the ram) lowering bender will be described, the present invention is not limited to this, and the crowning device may be provided on the upper table. Further, the crowning device may be provided on the upper table or the lower table of the lower table lifting type bender.

[0020]

As is apparent from the above description, the bender crowning device of the present invention is provided with a cutout portion in the center of either the upper or lower table, and the cutout portion is provided with the cutout portion. Servo motor is provided with a raising means for giving a required raising amount for correcting the deflection of one of the central portions of the lower table, detecting and adjusting the raising amount, and the raising means adjusting the ball screw and the ball screw so as to be able to move up and down. In addition, by providing a plurality of ball screws, the problems of the prior art are effectively solved, the configuration is simplified, its adjustment is easy,
Variations in the bending angle are removed, and processing accuracy is improved.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a crowning device according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a diagram showing how the upper and lower tables are bent.

FIG. 4 is a schematic configuration diagram of another embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of still another embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of still another embodiment of the present invention.

[Explanation of symbols]

 1 Bender 3 Lower table 5 Upper table 9 Pressurizing ball screw 13,23 Notch hole 15 Crowning device 16 Ball screw 17 Servo motor 19 Cyclo reducer 21 Encoder 25 Notch part 27 Upward bending support 33 Worm reducer

Claims (3)

[Claims] 1. A bender in which either an upper table or a lower table is supported and fixed to both side frames, and another table can be vertically moved and pressed against the fixed table. And a notch provided in the center of the table, and a required amount of heap that corrects the deflection of the center of either the upper table or the lower table provided in the notch is provided, and the amount of heap is detected and adjusted. A vendor crowning device, characterized in that it comprises a raising means. 2. The bender crowning device according to claim 1, wherein the raising means includes a ball screw and a servomotor that adjusts the ball screw so that the ball screw can be moved up and down. 3. The bender crowning device according to claim 2, wherein a plurality of ball screws are provided to disperse the raised amount while avoiding concentration of the raised amount in the central portion.