JPH07164058A - Sheet bending machine and method for using it - Google Patents

Abstract

PURPOSE:To cut off a slab part from a sheet material worked for microjoint by using a sheet bending machine. CONSTITUTION:In the sheet bending machine which is provided with an upper and lower dies 8, 10 for holding a sheet material in between and with a bender 11 for bending a part of the sheet projecting from these dies 8, 10 by its vertical operation, a blade 17 for cutting the sheet material is provided in the bender 11. A sheet material W is brought into this sheet bending machine 1, on which material punching has been performed such that a slug part W' and a product part W'' are connected with a joint (a) with a minute width; and this joint (a) is cut off with the cutting blade 17 of the bender 11 by the vertical operation of the bender 11. In the case where the joint (a) with a minute width is cut off by the sheet bending machine having a bender without a cutting blade 17, a clearance between the blade tip of the bender 11 and the upper/lower dies 8, 10 is set narrower than in the case of bending, and the bender is vertically operated similarly as in the case of bending.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material folding machine for bending a plate material sandwiched by upper and lower molds with a bending mold and a method of using the same.

[0002]

2. Description of the Related Art When a plate material is bent by this type of plate bending machine, the processing accuracy of the plate material carried into the plate material bending machine greatly affects the bending accuracy. For example, since the plate material processed by the right angle shear has a low processing accuracy, when the plate material is bent by a plate material bending machine, the accuracy of the bending process decreases. Therefore, in many cases, a plate material punched by a punch press and having a high processing accuracy is used for the bending process by the plate material bending machine. In many cases, punching in this case is microjoint processing in which a slag portion and a product portion are connected to each other at a minute width portion called a microjoint because of the necessity of feeding a plate material with a punch press machine. After being carried out from the punch press, the micro joint is cut by an operator with a tool such as a nipper, or cut by a dedicated micro joint cutting device installed in a post process of the punch press. The cut product plate material having a predetermined shape is carried into the plate material bending machine as a material plate material.

[0003]

However, it is inefficient to manually cut the micro joints, and it is not possible to automate the line, and if a dedicated micro joint cutting device is installed, the line is complicated. Will increase equipment costs and require a larger floor space in the factory.

An object of the present invention is to provide a plate bending machine and a method of using the plate bending machine which are capable of performing so-called micro joint separation work.

[0005]

A method of using a plate material folding machine according to the present invention is an upper mold and a lower mold for sandwiching plate materials with each other, and a bending mold for bending a part of the plate material projecting from the upper and lower molds by vertical movement. It is applied to a plate bending machine equipped with and. The punched plate material is carried into the plate material bending machine in a state where the slag portion and the product portion are connected by the minute width joint, and the minute width joint is cut by the vertical movement of the bending die.

A plate material folding machine of the present invention is a plate material bending machine having an upper die and a lower die for sandwiching plate materials with each other, and a bending die for bending a portion of the plate material projecting from the upper and lower dies by vertical movement. Therefore, the curved die is provided with a blade for cutting a plate material.

A second method of use of the present invention is a method of using the plate material folding machine according to claim 2, wherein the slag portion and the product portion are connected to each other by a small width joint. In this method, a plate material punched into a state is carried in, and the minute width joint is cut by the cutting blade of the bending die by the vertical movement of the bending die.

[0008]

According to the method of using the plate bending machine of the first invention,
Work to cut the product part from the punched plate material,
It can be performed by a plate bending machine without manual labor and without using a special device. It should be noted that when cutting the small width joint, the clearance between the bending die and the upper and lower dies can be satisfactorily cut by making the clearance narrower than during normal bending.

According to the plate material folding machine of the second invention and the method of using the plate material folding machine, since the cutting is performed by the cutting blade provided in the bending die,
It is possible to reliably cut the small width joint.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 3, the folding machine body 1 includes an upper die 8 attached to a ram 7 and driven to move up and down, a lower die 10 fixed to a body frame 9, and the upper and lower dies 8, 1.
The bending die 11 bends the protruding portion W1 of the plate material W sandwiched by 0 upward or downward. The upper die 8 can be changed in die width by a die width changing mechanism 16.

The bending die 11 is attached to the tip of a rocker arm 12, and the rocker arm 12 is connected to three actuators 13 to 15 to move vertically and swing.
It is possible to move in the front-back direction (direction A). This song type 1
1 shows a cutting blade 1 for cutting a micro-width joint a of a plate material W that has been micro-joint processed as shown in FIG. 1 (B).
7 is provided.

The plate material feeding device 2 arranged in front of the folding machine body 1 positions the table 3 on which the plate material W is placed and the plate material W on the table 3 in the width direction (direction B in FIG. 4). It is provided with a width determining mechanism 4 for performing, an origin finding mechanism 5 for performing positioning to a reference position, and a C-shaped carriage 6 that holds the plate material W and moves back and forth. The carriage 6 is installed on the bed 20 via rails (not shown) so as to be movable in the front-rear direction, and is driven in the front-rear direction by the feed screw 21 and its driving servomotor 22.

At the front end of the carriage 6, there is provided a plate material rotating device 23 for indexing and rotating the plate material W at a predetermined angle (for example, 90 ° or 180 °). Plate rotation device 23
Is composed of a pair of pads 24, 25 for sandwiching the plate material W on the table 3 from above and below, and an indexing motor 26 for rotationally driving the lower pad 25. The upper pad 24 is attached to an elevating holder 28 that can be moved up and down along a vertical rail 27 provided at the front end of the carriage 6, and is driven up and down by an elevating device 29 such as a cylinder device.

FIG. 4 is a plan view of the plate material feeding device 2. The table 3 has a carriage passage 30 that allows the carriage 6 to pass through in the center thereof, and is composed of a large number of strip-shaped plates 3a, and the positioning claws 4a of the width determining mechanism 4 move left and right from the gap between the strip-shaped plates 3a. It projects freely. The origin finding mechanism 5 is composed of a plurality of origin finding pins 5a and end locators 5b that can be projected and retracted by a cylinder device (not shown).
By pressing the front end of the plate material W against the origin-finding pin 5a and the right end 2 of the plate material W against the end locator 5b,
The upper right corner of the plate material W is aligned with the origin position P.

Next, the operation of the above mechanism will be described. The plate material folding machine 1 is assumed to be arranged in parallel with the turret punch press 31 in the arrangement shown in FIG. The plate material W carried into the plate material folding machine 1 from the turret punch press 31 is
As shown in FIG. 1A, it is assumed that the product portion W ″, which is a plate material that is a material for bending, and the slug portions W ′ on the four sides of the periphery are micro-jointed in a state where they are connected by the minute width joint a. .

When the plate material W thus micro-joint-processed is carried into the table 3 of the plate material folding machine,
First, the plate material W is rotated 180 ° by the plate material rotating device 23, and then the upper right corner of the plate material W is aligned with the origin position P. The reason for this rotation is as follows. That is,
In the turret punch press 31, the lower left corner of the plate material W is positioned at the origin position P ₀ on the table 32. However, in the plate material bending machine 1, the origin position P is opposite to that of the turret punch press 31, so that the origin position P is set. This is because the plate material W is positioned in accordance with the above and the positioning accuracy is improved.

The central portion of the plate material W whose origin has been set in this way is sandwiched by the plate material rotating device 23 of the carriage 6, and the plate material W is fed into the folding machine body 1 as the carriage 6 advances as shown in FIG. . The plate material W sent in is clamped by the upper and lower molds 8 and 10 as shown in FIG.
The small-width joint a that connects the more protruding one side slag portion W ′ and the product portion W ″ is cut by the cutting blade 17 when the bending die 11 descends, as shown in FIGS. As in A), the slag portion W ″ is separated from the product portion W ″.

When the separation of the slag portion W'on one side is completed by the above operation, the carriage 6 is retracted to the standby position, and then the lower pad 25 is rotated to remove the plate material W from, for example, FIG.
180 ° index rotation as in (B). After the rotation, the carriage 6 is moved forward again to insert the front side of the plate material W'into the folding machine body 1, and the slug portion W'on this side is separated from the product portion W "as in the previous case.

Similarly, the carriage 6 is retracted to the standby position, and the plate material W is indexed and rotated by 90 ° as shown in FIG. 2 (C). After the rotation, the carriage 6 is moved forward again to insert the front side of the plate material W into the folding machine body 1, and the slug portion W'on this side is separated from the product portion W "in the same manner as described above.
As shown in (D), the slag portion W ′ on the remaining one side of the plate material W is also separated from the product portion W ″.

In this way, the product portion W ″ obtained by separating the slag portions W ′ on the four sides is bent on each side as a material for bending. The bending operation is performed by the upper and lower dies 8 and 10 for the plate material W. In the gripped state, the portion W1 (FIG. 3) protruding from the upper and lower dies 8 and 10 is bent by the up and down movement of the bending die 11. The bending side is changed by the separating operation of the slug portion W '. The index rotation is performed in the same manner as in 1. The cutting and bending of the small width joint a may be performed for each side of the plate W.

FIG. 6 shows a method of separating the minute width joint a by a plate bending machine for ordinary bending which does not have the cutting blade 17 of FIG. The other construction of the plate bending machine is the same as that of the above-mentioned embodiment. in this case,
As shown in FIG. 6 (A), the clearance ΔG between the front ends of the upper and lower molds 8 and 10 for sandwiching the plate material W and the cutting edge of the bending mold 11 is
The clearance is set to be narrower than that in the case of bending, and as shown in FIG.
1 is moved up. As a result, by pressing the cutting edge of the bending die 11 against the base portion of the slag portion W ′ protruding from the upper and lower dies 8, 10, that is, the portion of the small width joint a,
The slag portion W'can be separated from the product portion W ".

[0022]

According to the method of the present invention, a plate material punched in a state in which the slag portion and the product portion are connected by the minute width joint is carried into the plate material folding machine, and the minute width joint is moved up and down by the bending die. Since it is cut, the work of cutting the product part from the punched plate material can be automatically performed by the plate material folding machine without the need for manual labor or addition of a dedicated device, improving the efficiency of bending work , And equipment costs can be reduced.

In the plate material folding machine of the second invention and the method of using the plate material, the plate material is provided with a blade for cutting, and the fine width joint is cut by the cutting blade by the vertical movement of the curve die. It is possible to reliably cut the small width joint by the plate bending machine.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a cutting operation of a plate material for micro joint processing by a plate material folding machine of the present invention.

FIG. 2 is an explanatory diagram showing a procedure of the cutting operation.

FIG. 3 is a cutaway side view of the plate material folding machine as a whole.

FIG. 4 is a plan view of a plate material feeding device portion of the plate material folding machine.

FIG. 5 is an explanatory diagram showing a loading operation of a plate material from a punch press to a plate material folding machine.

FIG. 6 is an explanatory view showing another embodiment of the plate material cutting operation by the plate material folding machine.

[Explanation of symbols]

1 ... Folding machine main body, 8 ... Upper mold, 10 ... Lower mold, 11 ... Bending mold,
17 ... Cutting blade, W ... Plate material, W '... Slag portion, W ″ ...
Product part, a ... Micro width joint, ΔG ... Clearance

Claims (3)

[Claims] 1. A plate material folding machine comprising an upper die and a lower die for sandwiching a plate material with each other, and a bending die for bending a portion of the plate material projecting from the upper and lower die by vertical movement. A method of using a plate material folding machine, which carries in a punched plate material in a state where the part is connected with a minute width joint, and cuts the minute width joint by vertical movement of the bending die. 2. A plate material folding machine comprising an upper die and a lower die for sandwiching a plate material with each other, and a bending die for bending a portion of the plate material projecting from the upper and lower dies by vertical movement. A plate bending machine, which is equipped with a cutting blade. 3. The plate material bending machine according to claim 2, wherein the punched plate material is carried in a state in which the slag portion and the product portion are connected by a minute width joint, and the minute width joint is formed by the bending die. A method of using a plate bending machine, which cuts with the curved cutting blade according to the vertical movement of the plate.