JP4493016B2 - Bending method - Google Patents

Description

The present invention relates to a bending method using a bending apparatus that can selectively switch between V bending and ironing bending.

  Conventionally, processing machines having a plurality of types of molds corresponding to products of various shapes have been developed. For example, Japanese Patent Laid-Open Nos. 62-254923 and 5-293554 are disclosed. Is disclosed.

  Among these, the processing machine disclosed in Japanese Patent Application Laid-Open No. Sho 62-254923 is provided with a mold exchanging device having a replacement punch mounted on the upper table of the press brake.

  In use, the die changer is lowered, the replacement punch is mounted on the punch already mounted on the upper table, and the workpiece is V-bent in cooperation with the die on the lower table. .

  Moreover, the processing machine of Unexamined-Japanese-Patent No. 5-293554 has installed the drum which attached several sets of forward bending / reverse bending metal mold | dies to the bend beam of an iron bending machine.

In use, the drum is rotated to position the necessary combination of dies at the processing position, and the workpiece pressed and fixed by the upper and lower plate presses is ironed and bent.
JP-A-62-254923 JP-A-5-293554

  Currently, when processing a product with a relatively complicated shape called a precision sheet metal product, processing by a press brake is performed (step bend processing having a plurality of mold layouts), and a long sash is used. When a product with a relatively simple shape such as is processed, processing by an iron bending machine is performed.

  Therefore, when you want to process both products, you need to have both a press brake and an iron bending machine, which requires less space for installation and excessive capital investment. Development of a new processing machine is desired.

  However, in the above-mentioned prior arts, Japanese Patent Laid-Open Nos. 62-254923 and 5-293554, the former is a V-bending die for a press brake, and the latter is an iron-bending die for an iron bending machine. It is configured to select necessary ones from inside.

  For this reason, as described above, although it is desired to develop a processing machine having both functions of a press brake and an iron bending machine, none of the conventional techniques described above can respond to it. Absent.

The object of the present invention is to provide a bending method using a bending apparatus that can selectively switch between V-bending and ironing bending, so that both bending and ironing functions can be provided to a single bending machine. To reduce installation space and capital investment.

In order to solve the above problems, according to the present invention,
As described in claim 1,
The upper plate presser 33 provided at the lower end of the linearly movable ram 32 and the work W pressed and fixed by the lower plate presser 34 provided at the upper end of the lower table 21 are subjected to iron bending with a bend beam 36, A plate presser auxiliary mold apparatus 1 that can be mounted on the lower surface of the plate presser 33 or the upper surface of the lower plate presser 34, and a V-bending punch P that is detachably provided at the lower end or the upper end of the plate presser auxiliary mold apparatus 1 A bending method using a bending device having a V-bending die D detachably provided on the upper surface of the lower plate presser 34 or the lower surface of the upper plate presser 33, and by lowering the ram 32, In the case where the workpiece W is V-bent processed by the V-bending punch P and the V-bending die D,
After the workpiece W (FIG. 3) is positioned by abutting against the standard mold of the bend beam 36 installed behind the lower table 21, or the workpiece W (FIG. 5) is placed at the base of the bend beam 36. There is a technical means called a bending method characterized in that the workpiece W is subjected to V-bending after abutting and positioning the provided auxiliary mold.

  According to the above-described configuration of the present invention, by using the plate pressing auxiliary mold apparatus 1 installed on the front surface of the ram 32 of the iron bending machine 30 (FIG. 1), the upper NC is used for bending. After product information is input from an apparatus (not shown) or the like (step 101 in FIG. 7), it is first determined whether it is a V bending process or an iron bending process (step 102 in FIG. 7). In the case of processing (down arrow in step 102 in FIG. 7), after determining the bending order, the mold, the mold layout, etc. (step 103 in FIG. 7), the upper plate pressing auxiliary mold apparatus 1 is moved to the upper plate. At the bottom of the presser 33 (step 104 in FIG. 7), in this state, a V-bending punch is attached to the lower end of the plate presser auxiliary die device 1 based on the determined die information and die layout information. Attach P and lower plate holder 34 If the V-bending die D is mounted on the surface (step 105 in FIG. 7), the workpiece W (FIG. 3) is positioned by, for example, abutting the throat portion of the positive bending die 36A of the bend beam 36 behind the lower table 21. (Step 106 in FIG. 7), if the ram 32 is lowered (step 107 in FIG. 7), a V-bending punch P mounted on the lower end of the ram 32 via the plate pressing auxiliary mold apparatus 1; The workpiece W can be V-bent with the V-bending die D mounted on the lower table 21 (step 108 in FIG. 7), while the determination result is (step 102 in FIG. 7). In this case (the right arrow of step 102 in FIG. 7), the iron bending can be performed by a conventional method (step 109 to step 113 in FIG. 7).

Therefore, according to the present invention, it is possible to provide a bending method using a bending apparatus that can selectively switch between V-bending and ironing bending. Since both functions of ironing and bending can be provided, the installation space is small and the capital investment is minimal compared to the case where two bending machines, ie press brake and iron bending machine, must be purchased. It can be held to the limit.

For this reason, according to the present invention, by providing a bending method using a bending device in which V bending and ironing bending can be selected and switched, both V bending and ironing bending can be performed on one bending machine. This has the effect of reducing the installation space and capital investment.

Furthermore, according to the present invention, the above-described plate pressing auxiliary mold apparatus 1, the lower table 21, the bend beam 36, and the like that are conventionally provided in the ironing bending machine are used as they are, and the V bending as described above is performed. Since there is a bending method that uses a bending device that can be switched between machining and iron bending, there is no need to add the entire structure of the iron bending machine. Therefore, effective use of the iron bending machine is not necessary. There is also an effect that it can be achieved.

Hereinafter, the present invention will be described with reference to the accompanying drawings by embodiments.
FIG. 1 is an overall view of the present invention.
The ironing bending machine 30 shown in the figure has a portal frame 22, which makes it difficult for the mechanical system to bend due to the reaction force on the workpiece W side during bending. A ram drive source 31 (for example, a motor M and a ball screw / nut mechanism) is installed at both inner ends (FIG. 2).

  With this configuration, when the ram drive source 31 is operated, the ram 32 guided by the portal frame 22 moves in the vertical direction (Z-axis direction) and can be positioned at a predetermined position.

  A lower table 21 is arranged at a position facing the directly movable ram 32 (FIG. 1), an upper plate presser 33 is provided at the lower end of the ram 32, and a lower plate presser is provided at the upper end of the lower table 21. 34 are provided.

  Also, as is well known, a bend beam 36 that moves in the vertical direction (Z-axis direction) and the front-rear direction (Y-axis direction) is provided behind the lower table 21 via the D-axis 37 and the A-axis 38. Is placed on the lower frame 35, and the bend beam 36 squeezes and bends the workpiece W in a conventional manner using, for example, a standard bending die 36A or a reverse bending die 36B (FIG. 6).

  Further, a manipulator 40 is provided in front of the lower table 21 so as to be able to position the processing table 48 in the front-rear direction (Y-axis direction).

  Thus, after positioning the work W gripped by the upper clamper 44 and the lower clamper 45 of the manipulator 40 (step 110 in FIG. 7), the upper plate presser is lowered by lowering the ram 32 (step 111 in FIG. 7). If the D-axis 37 and the A-axis 38 are actuated while the workpiece W is pressed and fixed by the 33 and the lower plate holder 34 (step 112 in FIG. 7), as described above, via the bend beam 36 as before. The workpiece W is ironed and bent (step 113 in FIG. 7).

  As shown in the figure, a plate pressing auxiliary mold apparatus 1 is installed on the front surface of the ram 32 (FIG. 1) of the iron bending machine having such a configuration.

  The plate pressing auxiliary mold apparatus 1 is originally (for example, disclosed in Japanese Patent Application Laid-Open No. 10-291031), so that the conventional upper plate pressing and the workpiece interfere during bending so that bending cannot be performed. It has been developed to process a workpiece having a special shape (for example, FIG. 13 of the publication).

However, in the present invention, as described above, the V-bending punch P is detachably provided at the lower end of the plate pressing auxiliary mold apparatus 1 (FIG. 1), and the V-bending die D is formed on the upper surface of the lower plate pressing 34. It is intended to provide a bending method using a bending apparatus that can selectively switch between V-bending and ironing bending by providing detachably.

  As shown in the figure, the plate pressing auxiliary mold apparatus 1 is provided in a state of projecting to the front surface of the ram 32 via the support member 2, and the casing 7 is provided with an upper and lower cylinder 3 and a turning cylinder 4. In addition, a mounting plate 5 is supported below the housing 7.

  With this configuration, as is well known (disclosed in Japanese Patent Laid-Open No. 10-291031), if the upper and lower cylinders 3 are operated, the mounting plate 5 can be moved and positioned in the vertical direction, and the swivel cylinder 4 is operated. Then, in cooperation with a rack and pinion mechanism (not shown), the mounting plate 5 can be moved and positioned in the front-rear direction (Y-axis direction).

  Therefore, when the plate pressing auxiliary mold apparatus 1 is mounted on the lower surface of the upper plate pressing member 33, first, the upper and lower cylinders 3 are operated to position the mounting plate 5 slightly below the lower surface of the upper plate pressing member 33. .

  Next, in this state, the revolving cylinder 4 is operated to position the mounting plate 5 directly below the lower surface of the upper plate holder 33 (FIG. 3), and then the upper and lower cylinders 3 are operated again to raise the mounting plate 5. Then, it can be mounted on the lower surface of the upper plate presser 33.

  Details of the mounting plate 5 are shown in FIG.

  In FIG. 3, a protrusion 5 </ b> A is provided on the upper surface of the mounting plate 5, and a groove 33 </ b> A corresponding to the protrusion 5 </ b> A is formed on the lower surface of the upper plate presser 33.

  With this configuration, as described above, when the mounting plate 5 is positioned immediately below the lower surface of the upper plate presser 33 and then lifted, it comes into contact with the lower surface. At that time, the protrusion 5A and the groove 33A are fitted together. Thus, the mounting plate 5 is fixed to the lower surface of the upper plate presser 33 and attached thereto.

  A mounting portion 6 is provided on the lower surface of the mounting plate 5.

  The mounting portion 6 is formed with an insertion hole 8 into which a V-bending punch P normally used in a press brake is inserted, and a wedge 9 as shown in the figure is automatically (fluid cylinder) on the insertion hole 8 side. Etc.) or manual (spring etc.) drive.

  With this configuration, after the wedge 9 is pulled to the left and immersed in the mounting portion 6, the V-bending punch P is inserted into the insertion hole 8 and the wedge 9 is protruded to the right. The V-shaped notch 10 is brought into contact with and pressed against the V-bending punch P side.

  As a result, the V-bending punch P is pressed and fixed to the inner wall 8A on the right side of the insertion hole 8, and the V-bending punch P is attached to the lower end of the plate pressing auxiliary mold apparatus 1.

  In this manner, the V-bending punch P is detachably attached to the mounting portion 6 on the lower surface of the mounting plate 5 via the convex portion constituted by the wedge 9 and the like and the concave portion constituted by the V-shaped notch 10 and the like. It can be attached and detached with a single touch.

  In the case of FIG. 3, the left V-shaped notch 10 is used. However, by using the right V-shaped notch 10, the direction of the V-bending punch P can be changed (FIG. 4). .

  Furthermore, a plurality of V-bending punches P can be detachably provided on the mounting plate 5 (FIG. 2) of the plate pressing auxiliary mold apparatus 1 in the left-right direction (X-axis direction).

  On the other hand, in the upper surface of the lower plate presser 34 (FIG. 3), the insertion hole 11 for inserting the V-bending die D normally used in the press brake is inserted, as in the mounting portion 6 side of the plate presser auxiliary die device 1. A wedge 12 is attached to the insertion hole 11 side so as to be driven automatically (such as a fluid cylinder) or manually (such as a spring).

  Similarly, with this configuration, the wedge 12 is pulled to the left and immersed in the lower plate holder 34, and then the V-bending die D is inserted into the insertion hole 11 so that the wedge 12 protrudes to the right. For example, it abuts on the V-shaped notch 13 on the V-bending die D side and presses the V-shaped notch 13.

  As a result, the V-bending die D is pressed and fixed to the inner wall 11A on the right side of the insertion hole 11, and the V-bending die D is mounted on the upper surface of the lower plate presser 34.

  As described above, the V-bending die D is composed of the convex portion constituted by the wedge 12 and the like, the V-shaped notch 13 and the like on the upper surface of the lower plate presser 34 in the same manner as the V-bending punch P. It is provided so as to be detachable via the recess, and is also detachable with a single touch.

  Further, the V-bending die D can change the direction as in the V-bending punch P (corresponding to FIG. 4).

  Further, similarly to the V-bending punch P, a plurality of V-bending dies D can be detachably provided on the upper surface of the lower plate presser 34 (FIG. 2) in the left-right direction (X-axis direction). .

  In this case, the V-bending punch P and the V-bending die D having any shape are arranged in any position in the left-right direction (X-axis direction) (the former is the mounting portion 6 of the plate pressing auxiliary mold apparatus 1 and the latter Is mounted on the upper surface of the lower plate holder 34 based on the mold information and the mold layout information for each bending order determined based on the product information (step 101 in FIG. 7) (step 103 in FIG. 7). ) Are set (step 105 in FIG. 7).

  In the embodiment described above, the case where the plate pressing auxiliary mold apparatus 1 is installed on the front surface of the ram 32 (FIG. 1) has been described in detail. However, the present invention is not limited to this, and the plate pressing auxiliary mold device. The apparatus 1 is installed on the front surface of the lower table 21 so that the plate pressing auxiliary mold apparatus 1 can be mounted on the upper surface of the lower plate pressing 34, and at the upper end of the plate pressing auxiliary mold apparatus 1, a V-bending is provided. The present invention can be applied to the case where the punch P for use is detachably provided, and the V-bending die D is provided detachably on the lower surface of the upper plate presser 33.

  That is, contrary to FIG. 3, the V bending punch P is mounted on the lower table 21 side, and the V bending die D is mounted on the upper ram 32 side.

  Hereinafter, a bending method using the bending apparatus according to the present invention having the above-described configuration will be described with reference to FIG.

(1) Judgment operation of V bending or ironing bending.
In step 101 of FIG. 7, product information is input, and in step 102, it is determined whether it is V bending or ironing bending.

  That is, for example, when product information including CAD or the like is input manually by an operator or automatically from the host NC device 50 (FIG. 1), the NC device 51 of the bending apparatus according to the present invention is preliminarily stored in a memory. From the contents of the machining program stored in the above, it is determined whether to perform V bending or ironing bending from now on.

(2) Operation in the case of V bending.
(2) -A Mounting operation of the plate pressing auxiliary mold apparatus 1 and mounting operation of the V bending punch P and the V bending die D.
If it is determined in step 102 in FIG. 7 that V bending is performed (down arrow), in step 103 in FIG. 7, the bending order, mold, mold layout, D value, and L value are determined. The plate pressing auxiliary mold apparatus 1 is mounted on the lower surface of the upper plate pressing 33, and in step 105, the V bending punch P and the V bending die D are mounted.

  That is, the NC device 51 switches the bending device according to the present invention to the V-bending mode when it is determined as V-bending.

  Thereby, after determining the bending order based on the input product information, the NC device 51 controls the drive mechanism of the plate pressing auxiliary mold device 1 and lowers the mounting plate 5. (The ram 32 side) is moved, positioned just below the lower surface of the upper plate presser 33 (FIG. 3), and further lifted slightly, whereby the mounting plate 5 is mounted on the lower surface of the upper plate presser 33.

  In this state, the operator, for example, has a predetermined shape of the V-bending punch P and the V-bending die D based on the die detailed information for each bending order determined in step 103 of FIG. 7 and the die layout information. The former is inserted into the insertion hole 8 of the mounting portion 6 of the mounting plate 5, and the latter is inserted into the insertion hole 11 on the upper surface of the lower plate presser 34 and mounted at a predetermined position.

(2) -B Positioning operation of the workpiece W.
In step 106 of FIG. 7, the workpiece W is positioned.

  That is, when the mounting operation of the V-bending punch P and the V-bending die D is finished, the manipulator 40 described above is automatically operated via (FIGS. 1 and 2) or manually by the operator. Positioning.

  In the case of manual operation by an operator, as shown in FIG. 3, a bending mold of a bend beam 36 installed behind the lower table 21, for example, a positive bending mold 36A is applied to a back gauge of a press brake. And the workpiece W is positioned by abutting against the throat of the positive bending die 36A.

  Thereby, as described above, step bending with a plurality of mold layouts is possible.

  Alternatively, the bend beam 36 can be pivoted and moved in the left-right direction at the base of the auxiliary bending mold (for example, as disclosed in Japanese Patent Application Laid-Open No. 11-188425). When a standard die such as a die or reverse bending die cannot be bent (when a lap joint formed on a short side of a workpiece is subjected to iron bending), as shown in FIG. It can also function as a back gauge abutment 41.

  In FIG. 5, the abutment 41 provided at the base portion 43 of the bend beam 36 is turnable and movable in the left-right direction (X-axis direction), and when used, it is positioned in the left-right direction as shown in the figure. The abutted abutment 41 is supported by a positive bending die 36A of the bend beam 36.

  In this state, the operator abuts the end surface of the work W against the end surface 41A of the abutment 41, and when the notch W1 is formed in the work W, as shown in FIG. The workpiece W can be positioned by abutting the notch W1 against the protrusion 42 provided on the abutment 41.

  As a result, similarly, step bend processing having a plurality of mold layouts becomes possible.

(2) -C V bending operation.
In step 107 of FIG. 7, the ram 32 is lowered, and in step 108, V bending is performed.

  That is, after the positioning of the workpiece W is completed, the NC device 51 (FIG. 1) operates the ram drive source 31 and lowers the ram 32 to attach it to the lower end of the plate pressing auxiliary mold device 1. When the V-bending punch P is lowered, the workpiece W can be V-bended by the descending V-bending punch P and the V-bending die D mounted on the upper surface of the lower plate holder 34 (FIG. 3).

(3) Operation in the case of iron bending.
If it is determined in step 102 in FIG. 7 that ironing is performed (right arrow), the bending order and the strokes of the D axis 37 and the A axis 38 are determined in step 109, and the workpiece W is positioned in step 110. In step 111, the ram 32 is lowered, and in step 112, the workpiece W is pressed and fixed by the upper plate presser 33 and the lower plate presser 34, and in step 113, the iron is bent.

  That is, the NC device 51 (FIG. 1) switches the bending device (FIG. 1) according to the present invention to the iron bending mode when it is determined that iron bending is performed (right arrow in step 102 in FIG. 7). .

  Thus, the NC device 51 determines the strokes of the D axis 37 and the A axis 38 for each bending order based on the input product information, and then positions the workpiece W via the manipulator 40 as usual. Then, the workpiece W pressed and fixed by the upper plate presser 33 and the lower plate presser 34 is ironed and bent by a forward bending die 36A or a reverse bending die 36B which is a standard die of the bend beam 36 (FIG. 6). Further, the product information includes information shared by the iron bending process and the V bending process, and it is possible to appropriately switch between the iron bending process and the V bending process for each process in one product.

INDUSTRIAL APPLICABILITY The present invention is used in a bending method that uses a bending apparatus that can selectively switch between V-bending and ironing bending, and a single bending machine is provided with both functions of V-bending and ironing. It is useful for reducing space and capital investment. Specifically, a V-bending punch is provided at the lower end of a plate pressing auxiliary mold apparatus of a conventional ironing bending machine, and a V-bending is applied to the upper surface of the lower plate pressing. The present invention is extremely useful when applied to a bending method using a bending apparatus in which dies are detachably provided.

1 is an overall view of the present invention. FIG. 2 is a front perspective view of FIG. 1. It is a figure which shows the V bending punch P attachment / detachment mechanism of the lower end of the board | substrate auxiliary | assistant mold apparatus 1 which comprises this invention, and the V bending die | dye D attachment / detachment mechanism of the upper surface of the lower board holder | retainer 34. It is a figure which shows the attachment or detachment aspect of V bending punch P (V bending die D) which comprises this invention. It is a figure which shows the V-bending abutment 41 which comprises this invention. It is a figure which shows the ironing bending process by this invention. It is a flowchart for demonstrating operation | movement of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plate pressing auxiliary die apparatus 2 Support member 3 Upper / lower cylinder 4 Turning cylinder 5 Mounting plate 6 Mounting part 7 Housing | casing 8,11 Insertion hole 9,12 Wedge 10,13 V-shaped notch 21 Lower table 22 Portal frame 30 Ironing bending Processing machine 31 Ram drive source 32 Ram 33 Upper plate retainer 34 Lower plate retainer 35 Lower frame 36 Bend beam 37 D-axis 38 A-axis 40 Manipulator 41 Abutting 42 Projection 44 Upper clamper 45 Lower clamper 48 Processing table 50 Upper NC device 51 NC device D V bending die P V bending punch W Workpiece

Claims (1)

The upper plate holder provided at the lower end of the linear ram and the workpiece fixed at the upper end of the lower table with the lower plate holder are ironed and bent with a bend beam, and the lower or lower side of the upper plate holder is A plate pressing auxiliary mold device that can be mounted on the upper surface of the plate press, a V-bending punch detachably provided at the lower end or upper end of the plate pressing auxiliary mold device, and the upper surface or upper plate pressing A bending method using a bending device having a V-bending die detachably provided on a lower surface, and by lowering a ram, the workpiece is V-bended by the V-bending punch and the V-bending die. When processing,
After positioning the workpiece against the standard bend beam mold installed behind the lower table, or after positioning the workpiece against the auxiliary mold provided at the base of the bend beam , bending method characterized by V bending the workpiece.

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