JP2005329414A - Bending die set, punch, and bending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the wear of a die 9 in the neighborhood of its shoulder portion and the wear of a punch 7 in the neighborhood of its tip end portion. <P>SOLUTION: The punch 7 comprises a punch body 11, and a rotary rod 15 for the punch, the rotary rod 15 being configured so as to have the hardness considerably higher than that of the punch body 11. The die 9 comprises a die body 21, and a rotary rods 25 for the die, the rotary rods 25 being configured so as to have the hardness considerably higher than that of the die body 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bending die set, a punch die, and a bending machine for bending a workpiece, which are used when bending the workpiece.

  A general bending machine will be briefly described as follows.

  That is, the general bending machine includes an upper table and a lower table vertically opposed to the upper table, and the lower table is movable in a vertical direction relative to the upper table. . A punch mold is detachably provided on the lower side of the upper table, and a die mold is detachably provided on the upper side of the lower table.

  Therefore, the workpiece is positioned with respect to the die mold. Then, the lower table is moved upward relative to the upper table to bring the die mold closer to the punch mold. As a result, the workpiece can be bent by cooperating the punch die and the die die.

In addition, there exists a thing shown to patent document 1, patent document 2, and patent document 3 as a prior art relevant to this invention.
Japanese Patent No. 311414 No. 3007920 Registered Utility Model Gazette Japanese Utility Model Sho 62-46121 microfilm

  By the way, since local pressure acts on the punch tip portion of the punch die and the die shoulder portion of the die die during bending, if the bending is performed for a long time, the punch of the punch die Wear of the tip and the die shoulder of the die die becomes severe, and the workpiece cannot be bent with a predetermined bending angle with high accuracy, and the quality of the bent product (the workpiece after bending) is lowered. On the other hand, if it is intended to keep the workpiece bending accuracy high, it is necessary to frequently polish the vicinity of the punch tip portion of the punch die and the die shoulder portion of the die die, and work efficiency is deteriorated. .

  In addition, since the workpiece slips on the die shoulder portion of the die mold during the bending process, the workpiece is scratched and the quality of the bent product is further deteriorated.

  On the other hand, when bending is performed using the die dies shown in Patent Document 1, Patent Document 2, and Patent Document 3, wear near the die shoulder portion of the die die, and die shoulder of the die die Although it is possible to suppress the slip of the workpiece with respect to the portion, it is difficult to suppress the wear near the punch tip portion of the punch die, and the above-mentioned problem cannot be solved completely.

In the invention according to claim 1, in a bending die set including a punch die and a die die used when bending a workpiece.
The punch mold is
A punch mold body,
The punch mold body is provided on the front end side of the punch, and is configured to have a hardness that is considerably larger than the hardness of the punch mold body, and has a punch rotation axis extending in the width direction of the punch mold body. It has a rotating rod for punch that can rotate as a center,
The die mold is
A die body,
Provided on the die shoulder side of the die mold main body and configured to have a hardness that is considerably larger than the hardness of the die mold main body, and has a die rotation axis extending in the width direction of the die mold main body. It is characterized by comprising a die rotating rod that can rotate as a center.

  According to the invention specific matter of the first aspect, the workpiece is positioned with respect to the die die. Then, the lower table in the bending machine is moved upward relative to the upper table to bring the die mold closer to the punch mold. As a result, the punch mold and the die mold cooperate to bend the workpiece.

  Here, the die rotating rod is configured to have a hardness that is considerably larger than the hardness of the die mold body, and rotates about the die rotation axis as the bending process proceeds. Therefore, it is possible to suppress wear near the die shoulder portion of the die mold (including the die rotating rod) and slip of the workpiece with respect to the die shoulder portion of the die die.

  Similarly, the punch rotating rod is configured to have a considerably larger hardness than that of the punch die body, and is rotatable about the punch rotation axis. Wear near the tip of the punch of the mold (including the punch rotating rod) can be suppressed.

  According to the invention specific matter of claim 2, in addition to the invention specific matter of claim 1, the punch rotating rod is divided by a plurality of punch short rods, and the die rotating rod Is divided by a plurality of short bars for die.

  According to the invention specific matter of the second aspect, in addition to the effect of the invention specific matter of the first aspect, the die rotating rod is divided by a plurality of die short rods, so that all the dies Of the short rods for use, only the die short rod that is in direct contact with the workpiece rotates about the die rotation axis as the bending process proceeds, and the rotational efficiency of the die rotation rod is improved. .

  Similarly, since the punch rotating rod is divided by a plurality of punch short rods, only the punch short rod that is in direct contact with the workpiece among all the punch short rods is the punch rotating rod. Rotating about the axial center, the rotational efficiency of the rotary rod for punch is improved.

  In the invention according to claim 3, in addition to the matters specifying the invention according to claim 1 or 2, the hardness of the rotary rod for punch and the hardness of the rotary rod for die are each 60HRc or more and 65HRc. It is configured as follows.

  According to the invention specific matter of claim 3, the same effect as the effect of the invention specific matter of claim 1 or claim 2 is achieved.

In the invention according to claim 4, in the punch die used when bending the workpiece,
A punch mold body,
Provided on the punch tip side of the punch mold body, and configured to have a considerably larger hardness than that of the punch mold body, with a rotational axis extending in the width direction of the punch mold body as a center. A rotatable punch rod, and
It is characterized by comprising.

  According to the invention specific matter described in claim 4, the punch rotating rod is configured to have a hardness that is considerably larger than the hardness of the punch die body, and the punch rotating shaft is the center. Since it is rotatable, it is possible to suppress wear in the vicinity of the punch tip of the plate mold (including the punch rotating rod).

  According to the invention specific matter of claim 5, in addition to the invention specific matter of claim 4, the punch rotating rod is divided by a plurality of punch short rods.

  According to the invention specific matter of the fifth aspect, in addition to the action according to the invention specific matter of the fourth aspect, the punch rotating rod is divided by a plurality of punch short rods. Of the short bars for punching, only the punching short bar that is in direct contact with the work rotates about the rotational axis for the punch, and the rotational efficiency of the rotary rod for punching is improved.

  In the invention according to claim 6, in addition to the invention specific matter according to claim 4 or claim 5, the punch rotating rod has a hardness of 60HRc or more and 65HRc or less. Features.

  According to the invention specific matter of the sixth aspect, the same effect as the effect of the invention specific matter of the fourth or fifth aspect is exhibited.

In the invention according to claim 7, in a bending machine for bending a work,
An upper table,
A lower table that is vertically opposed to the upper table and is movable in a vertical direction relative to the upper table;
A punch mold in a mold set, which is provided detachably on the lower side of the upper table, and comprises the invention-specifying matter according to any one of claims 1 to 3,
It is detachably provided on the upper side of the lower table, and a die mold in the mold set,
It is characterized by comprising.

  According to the invention specific matter described in claim 7, the same effect as the effect of the invention specific matter described in any one of claims 1 to 3 is achieved.

  According to the invention according to any one of claims 1 to 3 and claim 7, the wear near the die shoulder portion of the die die and the vicinity of the punch tip portion of the punch die. Since wear can be suppressed, the workpiece can be bent at a predetermined angle with high accuracy, and the quality of the bent product can be improved. In particular, since the slip of the workpiece against the die shoulder portion of the die mold can be suppressed, it is possible to further improve the bent product by minimizing the occurrence of scratches on the workpiece. Furthermore, according to the invention of any one of claims 2, 3, and 7, the rotational efficiency of the rotary rod for die and the rotational efficiency of the rotary rod for punch are improved. The effect is further improved.

  According to the invention of any one of claims 4 to 6, since the wear near the punch tip portion of the punch die can be suppressed, the wear near the die shoulder portion of the die die. By suppressing this, the workpiece can be bent at a predetermined angle with high accuracy, and the quality of the bent product can be improved. Furthermore, according to the invention described in any one of claims 5 and 6, the rotational efficiency of the rotary rod for punch is improved, and thus the effect is further improved.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

  1 is a perspective view of a bending mold set according to an embodiment of the present invention, FIG. 2 is an enlarged view of a main part of the bending mold set according to an embodiment of the present invention, and FIG. FIG. 2 is a diagram showing a characteristic part of a bending machine according to an embodiment of the present invention. Here, “up and down” means up and down in the drawings.

  Before describing the bending mold set 1 which is a main part of the embodiment of the present invention, the main configuration of a bending machine (only a part thereof) according to the embodiment of the present invention will be briefly described.

  The bending machine is a machine that performs a bending process on a plate-like workpiece W, and although not shown, includes a processing machine body as a processing machine base. An upper table 3 is provided on the upper portion of the processing machine body, and a lower table 5 is provided on the lower portion of the processing machine body so as to face the upper table 3 in the vertical direction. Here, the lower table 5 is movable in the vertical direction relative to the upper table 3.

  Next, the bending mold set 1 will be described in detail.

  The bending die set 1 is used when V-bending bending work is performed on the workpiece W. The bending die set 1 includes a punch die 7 detachably provided on the lower side of the upper table 3 and a lower table 5. It consists of a die mold 9 that is detachably provided on the upper side, and the specific configurations of the punch mold 7 and the die mold 9 are as follows.

  That is, the punch die 7 includes a punch die main body 11 as a punch die base, and the punch die main body 11 has a hardness that does not scatter when damaged. An R-shaped storage groove 13 is formed on the punch tip side of the punch mold body 11, and the storage groove 13 extends in the width direction of the punch mold body 11 (left and right in FIGS. 2 and 3). .

  A punching rotary rod 15 is provided in the storage groove 13 of the punch die main body 11 via a punch support plate 17 made of spring steel. The punch rotary rod 15 is arranged in the width direction of the punch die main body 11. It can be rotated around a punch rotation axis 15s extending to the center. Further, the punch rotating rod 15 is configured to have a considerably larger hardness than the punch mold body 11. Specifically, the punch rotating rod 15 has a hardness of 60 HRc or more and 65 HRc or less. ing. Further, the punch rotating rod 15 is divided by a plurality of punch short rods 19.

  Note that the punch rotating rod 15 and the punch support plate 17 are configured not to be separated from the storage groove 13 by appropriate means so that appropriate lubricating oil can be supplied to the support surface of the punch support plate 17. It has become.

  The die mold 9 includes a die mold main body 21 as a die mold base, and the die mold main body 21 is configured to have a hardness that does not scatter when damaged. A pair of R-shaped storage grooves 23 are formed on the die shoulder side of the die mold main body 21, and each storage groove 23 extends in the width direction of the die mold main body 21 (left-right direction in FIGS. 2 and 3). It extends.

  A die rotating rod 25 is provided in each storage groove 23 of the die mold main body 21 via a die support plate 27 made of spring steel, and each die rotating rod 25 is provided on the die mold main body 21. The die can be rotated around a die rotation axis 25s extending in the width direction. Further, each die rotating rod 25 is configured to have a considerably larger hardness than the die mold body 21. Specifically, the die rotating rod 25 has a hardness of 60HRc or more and 65HRc, respectively. It is as follows. Further, each die rotating rod 25 is divided by a plurality of die short rods 29.

  Note that the die rotation rod 25 and the die support plate 27 are configured not to be separated from the storage groove 23 by appropriate means, and appropriate lubricating oil is supplied to the support surfaces of the pair of die support plates 27. It can be done.

  Next, the operation of the embodiment of the present invention will be described.

  The workpiece W is positioned with respect to the die mold 9. Then, the lower table 5 is moved upward relative to the upper table 3 to bring the die mold 9 closer to the punch mold 7. As a result, the punch mold 7 and the die mold 9 cooperate to bend the workpiece W.

  Here, the die rotation rod 25 is configured to have a considerably larger hardness than the die mold body 21, and rotates about the die rotation axis 25s as the bending process proceeds. Therefore, it is possible to suppress the wear in the vicinity of the die shoulder of the die mold 9 (including the die rotating rod 25) and the slip of the workpiece W against the die shoulder of the die mold 9.

  Further, the punch rotating rod 15 is configured so that the hardness thereof is considerably larger than the hardness of the punch die main body 11 and can be rotated around the punch rotation axis 15s. Wear near the punch tip of the mold 7 (including the punch rotating rod 15) can be suppressed.

  Further, since the die rotating rod 25 is divided by a plurality of die short rods 29, only the die short rod 29 that is in direct contact with the workpiece W among all the die short rods 29 is subjected to bending processing. As it progresses, it rotates about the die rotation axis 25s, and the rotation efficiency of the die rotation rod 25 is improved. Similarly, since the punch rotary rod 15 is divided by a plurality of punch short rods 19, only the punch short rod 19 that is in direct contact with the workpiece W among all the punch short rods 19 is used for punching. It rotates about the rotation axis 15s, and the rotation efficiency of the rotary rod 15 for punching is improved.

  As described above, according to the embodiment of the present invention, since the wear near the die shoulder portion of the die die 9 and the wear near the punch tip portion of the punch die 7 can be suppressed, the workpiece W is set at a predetermined angle. Bending can be performed with high accuracy, and the quality of the bent product can be improved. In particular, since the slip of the workpiece W with respect to the die shoulder portion of the die mold 9 can be suppressed, it is possible to further reduce the occurrence of scratches on the workpiece W and further improve the bent product. Furthermore, the rotational efficiency of the die rotary rod 25 and the rotational efficiency of the punch rotary rod 15 are improved, so that the effect is further improved.

  The present invention is not limited to the description of the embodiment of the invention described above. For example, in addition to the bending mold set 1 used when performing V bending, ironing bending, step bending, etc. The present invention can be implemented in various modes, such as being applied to a bending mold set used when performing.

It is a perspective view of the bending die set concerning embodiment of this invention. It is a principal part enlarged view of the bending die set concerning embodiment of this invention. It is a figure which shows the characteristic part of the bending machine concerning embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bending die set 3 Upper table 5 Lower table 7 Punch die 9 Die die 11 Punch die main body 15 Punch rotary rod 19 Punch short rod 21 Die die main body 25 Die rotary rod 29 Die short rod

Claims (7)

In a bending die set consisting of a punch die and a die die used when bending a workpiece,
The punch mold is
A punch mold body,
The punch mold body is provided on the front end side of the punch, and is configured to have a hardness that is considerably larger than the hardness of the punch mold body, and has a punch rotation axis extending in the width direction of the punch mold body. It has a rotating rod for punch that can rotate as a center,
The die mold is
A die body,
Provided on the die shoulder side of the die mold main body and configured to have a hardness that is considerably larger than the hardness of the die mold main body, and has a die rotation axis extending in the width direction of the die mold main body. A bending die set comprising a die rotating rod that can rotate as a center. The bending rod according to claim 1, wherein the punch rotating rod is divided by a plurality of punch short rods, and the die rotating rod is divided by a plurality of die short rods. Type set. The bending die set according to claim 1 or 2, wherein the punch rotating rod and the die rotating rod have a hardness of 60HRc or more and 65HRc or less, respectively. In punch molds used when bending workpieces,
A punch mold body,
Provided on the punch tip side of the punch mold body, and configured to have a considerably larger hardness than that of the punch mold body, with a rotational axis extending in the width direction of the punch mold body as a center. A rotatable punch rod, and
A punch mold characterized by comprising: The punch die according to claim 4, wherein the punch rotating rod is divided by a plurality of punch short rods. The punch die according to claim 4 or 5, wherein the punch rotating rod has a hardness of 60HRc or more and 65HRc or less. In bending machines that perform bending on workpieces,
An upper table,
A lower table that is vertically opposed to the upper table and is movable in a vertical direction relative to the upper table;
A punch mold in a mold set, which is provided detachably on the lower side of the upper table, and comprises the invention-specifying matter according to any one of claims 1 to 3,
It is detachably provided on the upper side of the lower table, and a die mold in the mold set,
A bending machine characterized by comprising:

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