JP5743322B2 - Bending material, bending method, figure creation device - Google Patents

Description

In the present invention, a plate-like workpiece (bending material) is positioned at a predetermined pitch or every angle of a predetermined pitch with respect to a punch and die provided in a press brake, and bent, for example, an arc-shaped curved surface. The present invention also relates to a bending material for bending a product having a curved surface such as a conical curved surface, and a bending method for the bending material. Furthermore, the present invention relates to a graphic creation equipment for creating graphic of the bending material.

  Conventionally, when a plate-shaped workpiece is formed into an arcuate curved surface or a conical curved surface using a press brake, the workpiece is placed at a predetermined pitch or a predetermined pitch angle with respect to the punch and die provided for the press brake. Positioning is performed every time and bending is repeated. Note that there are Patent Documents 1 and 2 as prior examples that are considered to be related to the present invention.

JP-A-6-39439 JP-A-6-39440

  In the inventions described in Patent Documents 1 and 2, the press brake is provided with an end portion of a plate-like workpiece abutting on a back stop (back gauge) which can be positioned in the front-rear direction and the vertical direction on the press brake. The workpiece is positioned with respect to the punch and die. In this case, when the end portion of the workpiece, which is a portion that comes into contact with the back gauge, is held in a horizontal state, the workpiece can be accurately positioned at a predetermined pitch. However, if the end of the workpiece to be brought into contact with the back gauge gradually rises due to the bending process of the workpiece, the spring back does not move even if the end is in contact with the back gauge. For example, it becomes difficult to accurately position the work at a predetermined pitch.

  Further, in the inventions described in Patent Documents 1 and 2, it is impossible to position the workpiece at an angle of a predetermined pitch with respect to the punch and die using the back gauge.

  By the way, in order to bend a cone-shaped bent curved surface by positioning the workpiece at a predetermined pitch angle with respect to punches and dies in a press brake, the angle of the predetermined pitch is conventionally applied to the material body on which the product is developed. A ruled line is drawn every time. Then, the workpiece is positioned with respect to the punch and die by manual operation so that the ruled line coincides with the bending position of the punch and die. The same applies to a case where a plate-like workpiece is bent into a pipe shape.

  Therefore, conventionally, there has been a problem in improving the positioning accuracy and efficiency of the workpiece with respect to the punch and die.

  The present invention has been made in view of the conventional problems as described above, and performs positioning for each desired pitch with respect to the punch and die provided in the press brake and performs bending processing of the folding line for each desired pitch. A bending material for bending a product having a curved surface and forming the bent curved surface by bending a bending line for each desired pitch of the material body in a shape in which the product is developed. In addition, an auxiliary abutting piece that can freely contact a gauge member provided to the press brake to move back and forth is provided, and a desired fold line is positioned on the auxiliary abutting piece at a bending position by the punch and die. In this case, a contact positioning side for contact positioning with the gauge member is provided, and the contact positioning side and the desired folding line are formed in parallel.

  Further, in the bending material, the auxiliary abutting piece is located at a position avoiding the position of the fold line having a desired pitch, or before and after the contact positioning side when the auxiliary abutting piece is bent together with the fold line. It is connected to the material body at a position where the displacement in the direction falls within an allowable error range.

  Further, in the bending material, a connecting portion between the material main body and the auxiliary abutting piece is in a half blank state.

  Further, in the bending material, a width dimension in the front-rear direction of the auxiliary abutting piece is larger than a V width dimension of a V groove in the die.

  In the bending material, the shape of the material main body is a rectangular shape, and the auxiliary abutting piece is provided at the longitudinal center of both side edges parallel to each other.

Also, a bending method for forming the bending material into a cylindrical shape,
(A) Every time one end side of a rectangular material body is brought into contact with a gauge member that can move back and forth in a press brake, and the gauge member is moved and positioned at a desired pitch in a direction close to a die provided in the press brake. Bending the material body to form a first curved surface on one end of the material body;
(B) The material body is bent every time the other end side of the material body is brought into contact with the gauge member, and the gauge member is moved and positioned at a desired pitch in the direction close to the die. 2 forming each bending curved surface;
(C) The material body is bent each time the positioning edge of the auxiliary abutment piece provided on each side edge of the material body is brought into contact with the gauge member, and the gauge member is moved and positioned in a direction close to the die at every desired pitch. Forming a third bending curved surface that is continuous with the first bending curved surface and a fourth bending curved surface that is continuous with the second curved surface, respectively.
(D) a step of bending the center part in the longitudinal direction of the both side edges to form the material body into a cylindrical shape;
(E) a step of separating the auxiliary abutting piece from the material body;
Each process is provided.

  Further, in the bending method, a step of forming a fifth bending curved surface continuously with the third bending curved surface and a step of the fourth bending curved surface between the step (c) and the step (d). And a step of forming a sixth bent curved surface.

  In addition, the punch and die provided for the press brake are positioned at each desired pitch angle, and the folding line is bent at each desired pitch angle to provide a product with a conical curved curved surface. A bending material for bending, and when the bending curved surface is formed by bending a bending line for each angle of a desired pitch of a material body in a shape in which the product is developed, Auxiliary abutting pieces that can freely contact the gauge member that can be moved back and forth and tilted back and forth are provided, and a desired fold line is positioned on the auxiliary abutting piece at the bending position by the punch and die. A contact positioning side for contact and positioning with the gauge member is sometimes provided, and the contact positioning side and the desired folding line are formed in parallel.

  Further, in the bending material, the auxiliary abutting piece is provided with a separate contact positioning side parallel to a separate fold line different from the desired fold line.

  Further, in the bending material, the auxiliary abutting piece is provided with a contact positioning side that is different for each allowable angle of the inclination angle of the gauge member in the front-rear direction.

  In the bending material, the auxiliary abutting piece includes a plurality of contact positioning sides whose inclination directions are opposite to each other.

Also, a bending method for forming a conical curved curved surface in a bending material provided with an auxiliary abutment piece on the material body,
(A) In a state where the contact positioning side of the auxiliary abutting piece provided for the bending material is in contact with the gauge member, the position of the desired folding line is positioned at the bending position by the punch and die, and the material body is folded. Bending process,
(B) a step of bending the material body every time the gauge member is inclined in the front-rear direction for each angle of a desired pitch, and the position of the bending line is positioned at the bending position;
(C) a step of separating the auxiliary abutting piece from the material body;
Each process is provided.

Bending material for bending into a product with a curved surface by bending the material body positioned at each desired pitch or every desired pitch angle with respect to the punch and die provided for the press brake A figure creation device for creating a figure of
A press brake data table preliminarily storing data of an allowable inclination angle in the front-rear direction of the gauge member provided in the press brake so as to be movable back and forth and tiltable in the front-rear direction and a width dimension in the front-rear direction of the V groove in the die;
A development view creating means for creating a development view of the product and describing a plurality of bending lines for each desired pitch or for each angle of the desired pitch in the development view;
A graphic data memory for storing graphic data of a developed view created by the developed view creating means;
Simulation means for displaying a developed view based on graphic data stored in the V groove and gauge member of the die stored in the press brake data table and graphic data memory corresponding to the bending process;
A drawing means for drawing an auxiliary abutting piece having a contact positioning side that comes into contact with the gauge member on the developed view displayed by the simulation means;
It is characterized by having.

Also, a figure creation device that creates a bent material figure for bending into a cylindrical product by bending the material body positioned at a desired pitch with respect to the punch and die provided for the press brake. Because
A development view creating means for creating a development view of the product and describing a plurality of folding lines in the development view for each desired pitch;
A contact positioning side that comes into contact with a gauge member provided in the longitudinal direction of the press brake so as to be able to move back and forth is defined as the folding line at the longitudinal center of both side edges of the development drawing created by the development drawing creation means. Drawing means for drawing the auxiliary abutment piece provided in parallel to the material body; and
A graphic data memory for storing graphic data of the developed drawing created by the developed drawing creating means and graphic data of the auxiliary abutment piece drawn by the drawing means;
It is characterized by having.

In addition, the material body that positions the punch and die provided for the press brake at each desired pitch angle is bent at each desired pitch angle to provide a conical curved curved surface. A figure creation device for creating a figure of a bending material for bending a finished product,
A development view creating means for creating a development view of the material main body of the product and writing a bending line for each angle of a desired pitch in a portion that becomes a conical curved curved surface in the development view;
An auxiliary abutting piece having an abutting positioning side parallel to a desired fold line in a fold line for each angle of a desired pitch in the developed view of the material body created by the developed view creating means, the conical surface A drawing means for drawing in a state of being connected to the horizontal holding edge of the material main body that holds the horizontal during bending of the bent surface of the shape,
A graphic data memory for storing graphic data of the developed drawing created by the developed drawing creating means and graphic data of the auxiliary abutment piece drawn by the drawing means;
It is characterized by having.

Bending material for bending into a product with a curved surface by bending the material body positioned at each desired pitch or every desired pitch angle with respect to the punch and die provided for the press brake A figure creation device for creating a figure of
A press brake data table preliminarily storing data of an allowable inclination angle in the front-rear direction of the gauge member provided in the press brake so as to be movable back and forth and tiltable in the front-rear direction and a width dimension in the front-rear direction of the V groove in the die;
A development view creating means for creating a development view of the material body in the product and describing a plurality of folding lines for each desired pitch or for each desired pitch angle in the development view;
A graphic data memory for storing drawing data of a developed drawing of the material body created by the developed drawing creating means;
An angle range in which a plurality of bending lines are described for each angle of a desired pitch is divided by an allowable inclination angle in the front-rear direction of the gauge member stored in the press brake data table, and the angle range is calculated as the allowable inclination angle. Computing means for dividing into a plurality of common abutment angles within a range;
When performing the bending process of each fold line described for each angle of the desired pitch, the horizontal holding side equivalent side of the developed view corresponding to the horizontal holding side part of the material body holding the horizontal state on the die When drawing the developed view of the auxiliary abutment piece, the drawing means for describing the contact positioning side parallel to the reference fold line at each of the common abutment angles on the auxiliary abutment piece;
It is characterized by having.

  According to the present invention, the bending material is separated after forming the bending curved surface by positioning the punching and die in the press brake at every desired pitch or every angle of the desired pitch, and repeating the bending process. It has an auxiliary abutting piece. Then, the bending material is positioned with respect to the bending position of the punch and die by bringing the auxiliary abutting piece into contact with a gauge member provided so as to freely move back and forth.

  Therefore, positioning of the bending material with respect to the punch and die at every desired pitch or every desired pitch angle can be performed accurately and quickly, and the conventional problems as described above can be solved.

(A) is side surface explanatory drawing of a press brake, (B) is a plane explanatory drawing of a back gauge apparatus. It is a functional block diagram of the figure creation apparatus which concerns on embodiment of this invention. It is explanatory drawing of the bending raw material which concerns on embodiment of this invention. It is explanatory drawing which shows the connection relation of a bending raw material and an auxiliary | assistant abutting piece. It is explanatory drawing which shows the simulation of the bending process of a bending raw material. It is explanatory drawing which shows the simulation of the bending process of a bending raw material. It is a perspective explanatory view of a hopper-like product. It is explanatory drawing of the perspective view of the division part of the said hopper-shaped product, and explanatory drawing of an expanded view. It is explanatory drawing of the expansion | deployment figure of the bending raw material in the case of performing the bending process of the said division part. It is explanatory drawing of the simulation which performs the bending process of the said bending material. It is explanatory drawing of the simulation which performs the bending process of the said bending material. It is explanatory drawing of the expansion | deployment figure which shows another form of the said bending material. It is explanatory drawing which shows that there are various shapes in an auxiliary | assistant abutting piece.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, an overall configuration of a press brake for bending a plate-like workpiece (bending material) will be described.

  As shown in FIGS. 1 (A) and 1 (B), the press brake 1 includes left and right side frames 3 each having a C shape. A lower table 7 is provided. Further, an upper table 9 is provided on the upper side of the side frame 3 so as to face the lower table 7 in the vertical direction. A plate-like workpiece is cooperated with the die 5 at the lower portion of the upper table 9. A punch 11 for bending W is provided to be detachable and replaceable.

  One of the lower table 7 and the upper table 9 is configured as a ram that can move up and down, and is configured to be moved up and down by a ball screw that is rotationally driven by an actuator (not shown) such as a servo motor. Then, the engagement state between the punch 11 and the die 5 can be arbitrarily controlled by controlling the vertical movement position of the ram that can move up and down by a control device 13 such as a CNC device. In other words, by arbitrarily controlling the engagement state between the punch 11 and the die 5, the bending angle of the workpiece W can be controlled to an arbitrary bending angle.

  In other words, in order to position the workpiece W in the front-rear direction with respect to the die 5 with respect to the bending position of the workpiece W by the punch 11 and the die 5 (see FIG. 1A). The back gauge device 15 is provided on the right side in FIG. 1B and the upper side in FIG. More specifically, left and right support guide members 17L and 17R are provided on the back surface of the lower table 7 so as to project horizontally in the rearward direction (upward in FIG. 1B). Ball screws 19L and 19R that are long in the front-rear direction are rotatably supported on the guide members 17L and 17R. Servo motors 21L and 21R for individually rotating the ball screws 19L and 19R are mounted on the support guide members 17L and 17R.

  Ball nuts (not shown) are screwed to the left and right ball screws 19L and 19R so as to be movable in the front-rear direction, and pivots 23L and 23R stand upright on the respective ball nuts. Then, support blocks 25L and 25R are supported on the respective pivots 23L and 23R so as to be horizontally rotatable. One end of a guide beam 27 that is long in the left-right direction is integrally connected to one of the support blocks 25L and 25R, and the guide beam 27 is relatively movable in the longitudinal direction to the other support block. It is supported by.

  Therefore, the guide beam 27 can move in the front-rear direction while maintaining a parallel state with the die 5 mounted on the lower table 7, and incline in the clockwise direction or the counterclockwise direction in FIG. It can be moved in the front-rear direction while being held in a state. The guide beam 27 includes left and right gauge members 29L and 29R such as back gauges that can be individually moved and positioned in the left-right direction. In addition, the structure which moves and positions the said gauge members 29L and 29R separately to the left-right direction can employ | adopt appropriate positioning drive mechanisms, such as a ball screw mechanism rotated by a servomotor, a linear motor, for example. The gauge members 29L and 29R can ride on the upper surface of the die 5 to position the workpiece W, and the tip surface (contact positioning surface) for the contact positioning of the workpiece W is the longitudinal length of the guide beam 27. It is formed in a plane parallel to the direction.

  With the configuration described above, the contact positioning side parallel to the left-right direction of the workpiece W and / or inclined in the front-rear direction is brought into contact with the distal end surfaces of the gauge members 29L, 29R, so that the position of the bending line of the workpiece W is The punch 11 and the die 5 can be accurately positioned at the bending position.

  FIG. 2 is an exploded view of a workpiece that is bent by the press brake 1 (a whole body shape in which the entire bent product is developed or a component main body in which a product is developed for each of a plurality of combination parts). The figure is created by the figure creating apparatus 31 having a configuration conceptually and schematically shown.

  The graphic creation device 31 is composed of a computer, and includes a CPU 33, a ROM 35, and a RAM 37, and an input means 39 for inputting various data. In addition, the graphic creation device 31 includes a display unit 41 that performs various displays.

  Further, the graphic creation device 31 is provided with a development drawing creation means 43. The developed view creation means 43 creates a developed view of various products bent by a plate-shaped workpiece, or a plurality of combination parts (divided pieces, divided parts) combined to form a finished product. At the same time, it has a function of describing a fold line in a developed view. Since the combination parts (divided parts) are also individually bent, they can be regarded as one product in terms of the bending process. Since the development drawing creation means 43 is already well known, a more detailed description of the development drawing creation means 43 is omitted.

  Further, the graphic creation device 31 is provided with a graphic data memory 45. The graphic data memory 45 stores various graphic data such as graphic data of a developed view created by the developed view creating means 43 and graphic data of a figure drawn by the drawing means 47. Further, the graphic creation device 31 includes a press brake data table 49. In the press brake data table 49, the die width dimension corresponding to the die 5 to be used, the V groove dimension in the V groove of the die 5, the front and rear direction of the guide beam 27 in the back gauge device 15 (in FIG. 1B). The permissible inclination angle (± α) in the clockwise direction and the counterclockwise direction and the width dimensions of the left and right gauge members 29L and 29R are stored.

  Further, the graphic creation device 31 is provided with a calculation means 51. The calculation means 51 performs various calculation processes. For example, as an example of the calculation process, in the development drawing created by the development drawing creation means 43, for example, a predetermined range of the development drawing is set for each predetermined pitch. In the case of bending, the number of times of bending is calculated by dividing a predetermined range of dimensions by the predetermined pitch. Note that the calculation processing of the calculation means 51 is not limited to the above-described calculation processing of the predetermined pitch, and performs various calculation processing.

  Further, the graphic creation device 31 is provided with simulation means 53. This simulation means 53 performs various simulations. As an example, for example, a bending simulation when performing a bending process of a developed view created by the developed view creating means 43, various other simulations, Various simulations, such as a simulation of the order of development when the development drawing of the product is created by the development drawing creation means 43, are performed.

  When the drawing unit 47 is in a state in which the developed view created by the developed view creating unit 43 is displayed on the display unit 41, the operator sees the developed view displayed on the display unit 41 while the operator It is a means for drawing an auxiliary abutting piece having an abutting positioning side to be brought into contact with the gauge members 29L, 29R on the developed view. The drawing means 47 may be configured to automatically draw the auxiliary abutting piece on the developed view without manual operation.

  Furthermore, the graphic creation device 31 includes a processing program for a punch press or a laser cutting machine (not shown) that cuts a bending material from a plate-shaped workpiece corresponding to the graphic data created by the graphic creation device 31. Is provided with an output means 55 for outputting graphic data to an automatic programming device (not shown). The graphic data is also output from the output means 55 to an automatic programming device that automatically creates a processing program for bending a bent material by the press brake 1.

  The various functions of the various means 39, 53, 47, 41, 43, 51, 55 and the like provided in the graphic creation device 31 will become clearer by the description of the action described later.

  A bending material 61 (see FIG. 3) for forming a pipe as a product by bending a plate-like work at a predetermined pitch or a desired pitch (hereinafter simply referred to as a predetermined pitch) is as follows. It is a configuration. That is, the material body 61A of the bending material 61 includes both end edges 63A and 63B that are joined to each other when the material body 61A is bent at a predetermined pitch and formed into a pipe. Both end edges 63A and 63B are formed in parallel with a fold line 65 for bending the material body 61A at a predetermined pitch. Both side edges 67A and 67B of the bending material 61 are formed orthogonal to the both end edges 63A and 63B. That is, the material main body 61A is formed in a rectangular shape.

  When the material main body 61A is bent into a pipe, the both end edges 63A and 63B side of the material main body 61A are bent to form a curved curved surface. Therefore, both end edges 63A and 63B are in a state of being bent in advance and bounced up in the vicinity of the central portion in the longitudinal direction of both side edges 67A and 67B, which are finally bent parts. Therefore, in the final process of bending, it is difficult to position both end edges 63A and 63B in contact with the gauge members 29L and 29R in the press brake 1.

  Accordingly, auxiliary abutting pieces 69A and 69B are provided on both side edges 67A and 67B corresponding to the portion of the material main body 61A that is finally bent. Since the portion of the material body 61A that is finally bent is a portion that can be horizontally placed and positioned on the die 5, both side edges provided with the auxiliary abutting pieces 69A and 69B are provided. The portions in the vicinity of the central portion in the longitudinal direction of 67A and 67B correspond to horizontal holding edges (horizontal holding edges) that hold the horizontal in the final bending process.

  By the way, when the material body 61A is bent into a pipe shape (cylindrical shape) by positioning at a predetermined pitch with respect to the punch 11 and the die 5 in the press brake 1 and bending at a predetermined pitch, the final stage is performed. The portion to be bent is the vicinity of the central portion in the longitudinal direction of both side edges 67A and 67B in the material main body 61A. Therefore, the auxiliary abutting pieces 69A and 69B are provided at the longitudinal center portions of the side edges 67A and 67B. Both end edges 71A, 71B of the auxiliary abutting pieces 69A, 69B constitute contact positioning sides for positioning the material main body 61A by contacting the tip surfaces of the gauge members 29L, 29R. The fold line 65 is formed in parallel. The both end edges (contact positioning sides) 71A, 71B are provided at equidistant positions from the longitudinal center of the both side edges 67A, 67B in the material main body 61A, that is, at positions that are centrally distributed. Yes.

  The auxiliary abutting pieces 69A and 69B are connected to both side edges 67A and 67B of the material main body 61A with the following configuration. That is, as shown in FIG. 4, the auxiliary abutting pieces 69 </ b> A and 69 </ b> B are connected via a plurality of connecting portions 73 arranged at positions avoiding the position of the bending line 65 for bending the material main body 61 </ b> A. Connected. The distance between both end edges 71A and 71B in the auxiliary abutting pieces 69A and 69B is larger than the width dimension of the V-groove in the die 5 and the same direction in the arrangement region where the connecting portion 73 is arranged (FIG. 4). In the vertical direction).

  Further, the connecting portion 73 has a thickness approximately equal to the thickness of the material main body 61A in order to easily cut and separate the auxiliary abutting pieces 69A and 69B from the material main body 61A after the bending of the material main body 61A. The thickness is 1/2. Alternatively, the connecting portion 73 is connected in a half-drawn state (half blank state). Note that, as described above, forming the thickness of the connecting portion 73 to about ½ corresponds to a half blank state.

  As already understood, the connecting portion 73 is disposed in the vicinity of the final bending position when the material main body 61A is bent so as to avoid the position of the folding line 65. Is connected to the material main body 61A. Therefore, the auxiliary abutting pieces 69A and 69B are not bent together when the material main body 61A is bent, and the auxiliary abutting pieces 69A and 69B are deformed by the bending of the material main body 61A. There is nothing wrong. That is, the auxiliary abutting pieces 69A and 69B always hold a flat surface.

  The connecting portion 73 can be provided without avoiding the position of the fold line 65. That is, even when the auxiliary abutting pieces 69A and 69B are slightly deformed by bending the material body 61A at the position of the fold line 65, both ends of the auxiliary abutting pieces 69A and 69B are arranged. When the change in the front-rear direction (vertical direction in FIG. 4) of the edges (abutment positioning sides) 71A and 71B is small and within an allowable error range, the connecting portion 73 can be connected without avoiding the position of the bending line 65. It is also possible to arrange. As already understood, the bending material 61 has a configuration in which the material main body 61A includes auxiliary abutting pieces 69A and 69B.

  By the way, the material main body 61A in the bending material 61 is positioned at a predetermined pitch with respect to the bending position of the punch 11 and the die 5, and is bent at the position of the bending line 65, so that the material main body 61A. When forming a cylindrical shape, it is desirable that the predetermined pitch is an equal pitch. And when performing the bending process of the position of each fold line 65, it is desirable for the position of each fold line 65 to be located in the center part of the width direction of the V-groove in the die | dye 5. Therefore, it is desirable that the pitch of the fold lines 65 be larger than ½ of the V width of the V groove in the die 5.

  However, the dimension (interval dimension) from the position of the material body 61A closest to both end edges 63A and 63B, that is, from the position of the outermost fold line 65 to the both end edges 63A and 63B, is the same as that of the V groove. The dimension is set to be larger than ½ of the V width, and the pitch of each fold line 65 inside the outermost fold line 65 is set to a pitch dimension that is ½ or less of the V width of the V groove. It is also possible to do.

  In the configuration as described above, the material body 61A is bent into a cylindrical shape as follows.

  That is, in order to bend the material body 61A of the bending material 61 into a cylindrical shape by an odd number of multiple steps, the folding positions of the folding lines 65 with a predetermined pitch are grouped into a plurality of groups. At this time, first, the first and second groups 75A and 75B including a plurality of fold lines 65 for bending the both end edges 63A and 63B of the material body 61A into an arc shape in a range of about 90 ° are formed. Determine. Next, the third and fourth groups 75C, including a plurality of fold lines 65 for bending the regions adjacent to the first and second groups 75A and 75B into an arc having a desired angle range. Define 75D. At this time, the number of bending lines 65 included in the third and fourth groups 75C and 75D is set to be smaller than the number of bending lines 65 included in the first and second groups 75A and 75B.

  Similarly, fifth and sixth groups 75E and 75F including a plurality of fold lines 65 for bending the third and fourth adjacent areas into an arc having a desired angle range are defined. . In this case, the number of fold lines 65 included in the fifth and sixth groups 75E and 75F is set to be smaller than the number of fold lines 65 included in the third and fourth groups 75C and 75D. A plurality of fold lines 65 between the fifth and sixth groups 75E and 75F are defined as a seventh group 75G. Incidentally, if the number of the folding lines 65 is set to 46, the folding process of 46 processes is performed as a whole. In this case, the number of fold lines 65 in the first to seventh groups 75A to 75G can be set to 12, 11, 5, 8, 4, 3, 3.

  In the above-described case, the number of the folding lines 65 is set to 46, and the case where the material body 61A of the bending material 61 is bent into a cylindrical shape in seven steps has been described. However, the bending is performed into a cylindrical shape. Depending on the size of the inner diameter or the outer diameter, the number of the fold lines 65 may be increased or decreased. Further, the number of steps is not limited to seven steps, and may be five steps or nine steps.

  In order to bend the material body 61A of the bending material 61 into a cylindrical shape, first, the material body 61A is placed on the die 5, and one end edge 63A (one end side) of the material body 61A is attached to the gauge member 29L. , 29R. And in order to perform the bending process of the position of each fold line 65 in the said 1st group 75A, the innermost fold line 65 (the fold line of the position furthest from the edge 63A) in the 1st group 75A. Is aligned with the bending position of the punch 11 and the die 5.

  Then, after the material main body 61A is bent at the position of the innermost folding line 65, the gauge members 29L and 29R are advanced by a predetermined pitch (the gauge members 29L and 29R are brought close to the die 5). Each time the position of the fold line 65 in the first group 75A is sequentially positioned to the fold position, the material body 61A is bent to obtain a circle in a range of about 90 °. An arc-shaped first bending curved surface 77A is formed (see FIG. 5A).

  After the folding process at the positions of the plurality of folding lines 65 in the first group 75A, the front and back of the material main body 61A are reversed, and the other end edge 63B (the other end side) of the material main body 61A is connected to the gauge member 29L. 29R, and similarly to the case of the first group 75A, the positions of the plurality of fold lines 65 in the second group 75B are sequentially positioned from the inside toward the edge 63B at predetermined pitches, An arcuate second bending curved surface 77B having a range of about 90 ° is formed on the end edge 63B side (see FIG. 5B).

  As already understood, when the first and second bent curved surfaces 77A and 77B are formed by bending the one end edge 63A side and the other end edge 63B side of the material body 61A into an arc shape, The edge 63A and the other end edge 63B are brought into contact with the gauge members 29L and 29R, respectively, and the gauge members 29L and 29R are sequentially moved and positioned in the direction close to the die 5, so that the edges 63A and 63B side from the inside of the material body 61A. Positioning at a predetermined pitch to the (outside) and sequentially bending. As described above, when the both end edges 63A and 63B side of the material main body 61A are bent in an arc shape, the both end edges 63A and 63B are in a raised state as shown in FIG.

  Therefore, when the bending process is performed at the positions of the folding lines 65 in the third group 75C to the seventh group 75G, the tip surfaces of the gauge members 29L and 29R are brought into contact with the auxiliary abutting pieces 69A and 69B. The material main body 61A is positioned.

  That is, in the third to seventh groups 75C to 75G, the positions of the fold lines 65 in the groups 75C to 75G are sequentially bent at a predetermined pitch, and the third and fifth groups 75C to 75E. When the bending process is performed at the position of each folding line 65 included in the above, the edge 71A side of the auxiliary abutting pieces 69A and 69B is brought into contact with the distal end surfaces of the gauge members 29L and 29R. Then, the bending process is sequentially performed inward from the position of the folding line 65 that is closest to the folding line 65 in the group that has already been folded.

  When bending the positions of the folding lines 65 included in the fourth and sixth groups 75D and 75F, the edge 71B side of the auxiliary abutting pieces 69A and 69B is the tip of the gauge members 29L and 29R. In the same manner as described above, bending is performed sequentially from the outside to the inside by contacting the surface (see FIGS. 5C and 6A). And the bending process of each bending line 65 in the 7th group 75G is performed. When bending each folding line 65 in the seventh group 75G, positioning is performed by contacting the end surfaces of the gauge members 29L and 29R on the end edge 71A side of the auxiliary abutting pieces 69A and 69B, Bending is sequentially performed from the position of the folding line 65 close to the fifth group 75E side to form an arc-shaped bending curved surface (see FIG. 6B).

  As described above, after the material body 61A of the bending material 61 is bent into a cylindrical shape, the auxiliary abutting pieces 69A and 69B are cut and separated in a separate process.

  As will be understood from the above description, after the both end edges 63A and 63B side of the material main body 61A are bent into an arc shape, the bending lines 65 in the range of the third to seventh groups 75C to 75G are formed. When the position is positioned at the position where the punch 11 and the die 5 are bent, the auxiliary abutting pieces 69A and 69B provided on both side edges 67A and 67B of the material body 61A are always held horizontally. Then, since the end surfaces of the gauge members 29L and 29R are brought into contact with both end edges 71A and 71B of the auxiliary abutting pieces 69A and 69B, the positioning of the material main body 61A at a predetermined pitch is performed accurately. To get.

  In addition, although the said description is description about the case where the raw material main body 61A is bent into a cylindrical shape, when the cross-sectional shape is formed into a cylindrical body having an elliptical shape or an oval shape, for example, or the cross-sectional shape is a polygonal shape. When each corner is formed in a cylindrical body having a curved surface such as an arc, for example, the bending material 61 provided with the auxiliary abutting pieces 69A and 69B is used to bend the bending material 61 with respect to the bending position. The position of each fold line 65 can be accurately determined. The same applies to the case where the cross-sectional shape is not limited to a cylindrical shape and is a C-shape or a semicircular arc shape.

  As already understood, the material main body 61A is bent at a predetermined pitch or at an arbitrary pitch by positioning the folding line 65 at the folding processing position, thereby providing a desired bending curved surface. When the product is bent, the auxiliary abutting pieces 69A and 69B are provided at positions corresponding to the folding line 65 for final folding. In other words, since the position of the folding line 65 corresponding to the auxiliary abutting pieces 69A and 69B is finally bent, the auxiliary abutting pieces 69A and 69B have the material body 61A always horizontal. It is provided at a position to be held in.

  The shape of the bending material 61 is created as follows. That is, since the product to be bent is cylindrical and has a simple rectangular shape, when the cylindrical inner diameter or outer diameter and length are input from the input means 39 in the graphic creation device 31, the development drawing creation means A rectangular shape is developed by 43. The developed rectangular material body 61A is displayed on the display means 41.

  The figure displayed on the display means 41 has the same shape as the material body 61A, the bending material 61, and the auxiliary abutting pieces 69A and 69B. Therefore, in the case of a graphic, the material main body graphic, the bending material graphic, the auxiliary abutting piece graphic, and the characters “graphic” are added and described. However, in order to facilitate understanding, reference numerals 61A, 61, 69A are used. , 69B, etc. are used in common.

  As described above, when necessary dimension data of the cylindrical shape is input from the input unit 39 and the number N of times of bending for bending the material main body 61A into the cylindrical shape is input from the input unit 39, the development drawing generating unit 43 is provided. Based on the length dimension L of both side edges 67A and 67B of the rectangular material main body figure 61A developed by the above, the calculating means 51 calculates the pitch of the fold line 65. That is, the fold line (outermost fold line) 65 closest to the both end edges 63A and 63B in the material main body figure 61A is the width dimension V of the V groove in the die 5 stored in the press brake data table 49. Based on the above, the positions are separated from the both end edges 63A, 63B by V / 2 or more. Therefore, the pitch of the fold line 65 is calculated by (LV) / N and displayed on the material main body figure 61A.

  Therefore, by looking at the material main body graphic 61A displayed on the display means 41, avoiding the position of the fold line 65 at the center in the longitudinal direction of both side edges 67A and 67B of the material main body graphic 61A, or The connecting portion graphic 73 is described by the drawing means 47 so as to be applied to a few fold lines 65 in the central portion at most. Then, the bending material graphic 61 is displayed at the position of the connecting portion graphic 73 displayed on the display means 41 by describing the auxiliary abutting piece graphics 69A and 69B wider than the V groove of the die 5 by the drawing means 47. It is displayed on the means 41.

  In addition, the said description demonstrated the case where the connection part figure 73 and auxiliary | assistant bump piece figure 69A, 69B were described manually. However, since the calculation result of the calculation means 51 indicates the position of the folding line 65 on the material main body graphic 61A and the data stored in the press brake data table 49, the width dimension of the V groove in the die 5 is known. The part graphic 73 and the auxiliary abutting piece graphics 69A and 69B can be automatically described by the drawing means 47.

  In describing the connecting portion graphic 73 and the auxiliary abutting piece graphics 69A, 69B in the material main body graphic 61A, the connecting portion graphic 73 is appropriately separated from the auxiliary abutting piece graphics 69A, 69B from the material main body graphic 61A. Since it is for hold | maintaining in a state, it can be set as the desired length or the length set beforehand. Further, both end edges 71A, 71B of the auxiliary abutting piece figures 69A, 69B are parallel to the fold line 65, and the interval dimension between the both end edges 71A, 71B is larger than the width dimension of the V groove in the die 5. To do. The length dimension (the width dimension in the left-right direction) of the both end edges 71A, 71B should be approximately equal to the width dimension in the left-right direction of the left and right gauge members 29L, 29R stored in the press brake data table 49. Is desirable.

  As described above, the graphic data of the bending material graphic 61 in which the connection portion graphic 73 and the auxiliary abutting piece graphics 69A and 69B are described in the material main body graphic 61A displayed on the display means 41 is stored in the graphic data memory 45. Yes. The graphic data stored in the graphic data memory 45 is a punch press or laser cutting machine that cuts the bending material 61 corresponding to the bending material graphic 61 displayed on the display means 41 from a plate-shaped workpiece. The output means 55 outputs to an automatic programming device that creates a machining program for a plate-like machine. The graphic data is output from the output means 55 to an automatic programming device that creates a press brake machining program.

  When the processing program for press brake created by the automatic programming device is input to the control device 13 provided in the press brake 1, the press brake 1 positions the gauge members 29L and 29R on the die 5. As described above, the bending line 65 is in contact with both end edges 71A and 71B of the auxiliary abutting pieces 69A and 69B provided on the edges 63A and 63B of the bending material 61A and the side edges 61A and 67B of the bending material 61A. The bending material 61 </ b> A is positioned with respect to the die 5 by advancing and retreating corresponding to the pitch. At this time, since the width dimension in the left-right direction of the auxiliary abutment pieces 69A, 69B is formed to be substantially equal to the width dimension in the left-right direction of the gauge members 29L, 29R, the entire front end surfaces of the gauge members 29L, 29R are auxiliary. The abutting pieces 69A and 69B come into contact with each other, and the material body 61A can be stably and accurately positioned in the front-rear direction.

  By the way, as shown in FIG. 7, for example, a hopper having a square hole at the top and a circular hole at the bottom is bent at an angle of a predetermined pitch with the flat portions 81 </ b> A to 81 </ b> D. The hopper-shaped product 85 provided with the curved surface 83A-83D of the cone surface shape performed may be manufactured. In this case, since it is difficult to produce a hopper-like product 85 by bending one plate-like workpiece, the hopper-like product 85 is divided into a plurality of divided parts, and each divided part is bent individually. After being processed, the hopper-like product 85 is manufactured by joining the divided parts by welding.

  In order to divide the hopper-like product 85 into a plurality of divided parts, the center part of the flat part 81A and the flat part 81C or the central part of the flat part 81B and the flat part 81D is divided into a vertically cut form. It may be divided into two parts. Moreover, the flat part 81A-81D may be divided into four in the form cut | disconnected up and down. When the center portion of the flat portions 81B and 81D is cut up and down to divide the hopper-like product 85 into two parts, one divided part 85A is shaped as shown in FIG. 8A. In FIG. 8A, it is illustrated in an upside down state.

  Then, when the divided component 85A is developed, a form as shown in FIG. 8B is obtained. The developed figure of the divided part 85A is created by the developed figure creating means 43 when the graphic data of the divided part 85A shown in FIG. In order to facilitate understanding, the same figure “85A” is also used for display in the case of a developed figure obtained by developing the divided component 85A.

  In order to bend the material body corresponding to the unfolded figure 85A by the press brake 1, as described above, the unfolded figure of the bending material provided with the auxiliary abutting piece on the material body is created, and based on this unfolded figure It is necessary to cut a plate-shaped workpiece and obtain a bending material. Therefore, a method for creating a developed pattern 87 (see FIG. 9) of a bending material that is bent in the press brake 1 will be described.

  As described above, the developed graphic 85A created by the developed drawing creating means 43 is displayed on the display means 41. Then, from the intersection 91A of the straight side 89A of the plane part 81A and the straight side 89B of the plane part 81B, and from the intersection 91B of the straight side 89A and the straight side 89D of the plane part 81D, a conical curved curved surface 83A, In order to form 83D, a fold line (ruled line) 65 is described for each angle of a predetermined pitch. In this case, an intermediate position 95C between the intersection 95A between the straight dividing line 93B of the plane portion 81B and the development curve 95 and the intersection 95B between the division line 93D of the plane portion 81D and the development curve 95 is the bending. This is the boundary position between the curved surfaces 83A and 83D.

  In addition, the angle of the predetermined pitch of the fold line 65 is an angle formed by a straight line connecting the intersecting portion 91A (91B) and the intersecting portion 95A (95B) and a straight line connecting the intersecting portion 91A and the intermediate position 95C. This is an angle obtained by equally dividing θ. That is, when the number of bendings for how many times the bending process is performed between the angles θ is input from the input unit 39, an angle of a predetermined pitch is calculated by the calculation unit 51, and based on the calculation result of the calculation unit 51. The fold line 65 is entered (described) at every angle of a predetermined pitch.

  As described above, after a plurality of fold lines 65 are described in the development pattern 87 of the bending material, the position where the auxiliary abutting piece graphic 97 should be entered is searched. As the position where the auxiliary abutting piece graphic 97 is to be described, the developed graphic 87 displayed on the display means 41 is viewed, and the position of the linear side in the developed graphic 87, for example, the linear sides 89A, 89B, 89D. The positions of the dividing lines 93B and 93D can be set. Further, the folding process of the developed figure 87 at the position of each folding line 65 is simulated by the simulation means 53, and the side portions that are maintained (held) horizontally, for example, the straight side 89A, the dividing line 93B, 93D is possible. That is, when the bending process simulation is performed, the straight sides 89B and 89D are moved and displaced upward in accordance with the bending process, so that they are not suitable for providing the auxiliary abutting piece graphic 97. I understand.

  Therefore, an auxiliary abutment provided with a contact positioning side that comes into contact with the tip surfaces of the gauge members 29L and 29R in the press brake 1 when the bending curved surfaces 83A and 83D are bent at the position of the straight side 89A. A case where a graphic of the single graphic 97 is formed will be described.

  Prior to forming the auxiliary abutment piece graphic 97, first, the angle θ is an allowable angle (± α) of the guide beam 27 stored in the press brake data table 49 in the front-rear direction. Therefore, the calculation means 51 divides the angle θ. When the result of this division is 2.6, for example, in order to perform the bending process in the range of the angle θ, the guide beam 27 is allowed to be allowed from the state parallel to the horizontal direction (± α). The angle must be changed three times. In other words, it is necessary to divide the plurality of fold lines 65 included in the bending curved surfaces 83A and 83D into a plurality of groups G1, G2, and G3 within a range of an allowable angle ± α.

  In order to describe the auxiliary abutting piece graphic 97 on the straight side 89 </ b> A of the developed graphic 87, first, the width dimension of the auxiliary abutting piece graphic 97 is determined. Then, with the bending line 65A on the outermost side (the closest side to the dividing line 93B) in the bending curved surface 83A as a reference line in the first group G1, the first contact positioning side 99A parallel to the bending line 65A is The drawing means 47 describes (draws) one end side of the width dimension (one side edge of the auxiliary abutting piece graphic 97). Next, the second contact positioning side 99B parallel to, for example, the fold line 65B, which becomes the reference line in the second group G2, is described by being connected to the first contact positioning side 99A. Similarly, the third contact positioning side 99C parallel to the fold line serving as the reference line in the third group is described by being connected to the second contact positioning side 99B. Similarly, the contact positioning sides 101A, 101B, and 101C when the bending curved surface 83D is bent are described on the other side edge of the auxiliary abutting piece graphic 97. The auxiliary abutting piece graphic 97 is described in a state of being connected to the straight side 89 </ b> A via the connecting portion 103.

  As described above, the graphic data of the bending material developed graphic 87 describing the auxiliary abutting piece graphic 97 is stored in the graphic data memory 45. Then, one end face of the graphic of the gauge members 29L, 29R is brought into contact with the contact positioning sides 99A, 99B, 99C of the auxiliary abutment piece graphic 97 in the developed graphic 87 of the bending material stored in the graphic data memory 45. . Then, the guide beam 27 is inclined at every predetermined pitch angle, and the guide beam 27 is moved in the front-rear direction, and the bending process at each fold line 65 in the bending curved surface 83A is simulated by the simulation means 53. (See FIGS. 10A to 10C). The bending process at each folding line 65 in the bending curved surface 83D is also simulated in the same manner (see FIGS. 11A to 11C).

  Incidentally, the simulation of the bending process in which the figure of the gauge member abuts on the abutment positioning side 99A of the auxiliary abutment piece figure 97 is performed by folding the bending lines 65 included in the first group G1 on the bending curved surface 83A. This is to simulate the bending process. The simulation of the bending process in which the figure of the gauge member is brought into contact with the contact positioning sides 99B and 99C is performed at each bending line 65 included in the second group G2 and the third group G3 in the bending curved surface 83A. It is a simulation of a bending process.

  As described above, when there is a problem as a result of the simulation of the bending process by the simulation unit 53, for example, the number of the groups G1 to G3 is increased or decreased, and one contact positioning side is obtained. The angle range when the bending process is performed by changing the inclination angle in the front-rear direction with the gauge member abutted on is changed to be small or large, and the description of the auxiliary abutting piece graphic 97 is corrected. If there is no problem as a result of the simulation, a bending material having the same shape as the bending material graphic stored in the graphic data memory 45 is cut from the plate-shaped workpiece. Then, using this cut bending material, bending is performed in the same manner as in the simulation.

  In the above description, the case where the auxiliary abutting piece graphic 97 including the contact positioning sides 99A, 99B, 99C and 101A, 101B, 101C is provided on the straight side 89A of the developed figure 87 is illustrated. However, as shown in FIG. 12, it is also possible to employ a configuration in which separate auxiliary abutting piece figures 105 and 107 are provided at the positions of the dividing lines 93D and 93B, respectively. In this case, each of the auxiliary abutment piece figures 105 and 107 has a contact positioning side 99A and 101A, and the extension lines of the contact positioning sides 99A and 101A are a straight side 89D and a dividing line 93D. It is desirable to have a configuration that matches the intersection 109A and the intersection 109B between the straight line 89B and the dividing line 93B.

  With the above configuration, when the bending material is actually bent, positioning of the bending material is performed by bringing the tip surfaces of the gauge members 29L and 29R into contact with the two points of the contact positioning sides 99A and 101A and the intersecting portions 109A and 109B. Thus, the position of the bending line 65 of the bending material relative to the bending position of the punch 11 and the die 5 provided in the press brake 1 can be stably and accurately positioned.

  As described above, since the auxiliary abutting piece figures 105 and 107 are provided with the abutting positioning sides 99A and 101A, the auxiliary abutting piece figure 97 is provided with the abutting positioning sides 99B, 99C, 101B and 101C. It becomes a composition.

  As already understood, a plate-shaped workpiece (bending material) is placed at a predetermined pitch, a desired pitch, a predetermined pitch angle, or a desired pitch with respect to the bending position of the punch 11 and the die 5 in the press brake 1. When performing bending by positioning for each pitch angle, the workpiece is provided with an auxiliary abutting piece having an abutting positioning side that abuts against the tip surfaces of the gauge members 29L and 29R in the press brake 1. Therefore, the workpiece can be positioned in a state where the gauge members 29L and 29R are in contact with the contact positioning side of the auxiliary abutting piece.

  In other words, for example, the abutting positioning side of the auxiliary abutting piece provided on the work is brought into contact with the tip surfaces of the gauge members 29L and 29R that are preliminarily positioned at every predetermined pitch or every predetermined pitch angle. What is necessary is just to position. Therefore, the bending position of the workpiece can be easily and always accurately positioned with respect to the bending position of the punch 11 and the die 5. At this time, it is not necessary to crease the crease line as the position of the fold line on the work, and the bending material (work) for bending the product including the curved surface formed by the bending process. Processing is easy.

  In the present invention, the shape of the bending material for bending a product having a bending curved surface formed by bending is not limited to the shape described above, and the product shape, the curvature of the bending curved surface, The shape and size of the material body in the bending material and the shape and size of the auxiliary abutting piece provided in the material body vary depending on the range in which the bending curved surface is formed.

  For example, as shown in FIG. 13, when the bending process is repeated for each angle of a predetermined pitch within the range of the angle β, the angle in the fan-shaped material main body 111 becomes the reference for each of the N1, N2, and N3 times. The auxiliary abutting piece 113 provided with the contact positioning sides 113A, 113B, 113C parallel to the fold line 65 in order is provided on one side edge 111A of the material body 111. The auxiliary abutting piece 115 provided with the contact positioning sides 115A, 115B, 115C, 115D that are parallel to the fold line 65 serving as a reference for each of the N4, N5, N6, and N7 times is successively provided. 111 is provided on the other side edge 111B.

  That is, the shapes of the auxiliary abutting pieces 113 and 115 are not necessarily the same shape or symmetrical shape.

DESCRIPTION OF SYMBOLS 1 Press brake 5 Die 11 Punch 15 Back gauge device 27 Guide beam 29L, 29R Gauge member 31 Graphic creation device 39 Input means 41 Display means 43 Development drawing creation means 45 Graphic data memory 47 Drawing means 49 Press brake data table 51 Calculation means 53 Simulation means 55 Output means 61 Bending material 61A Material body 69A, 69B Auxiliary abutting pieces 71A, 71B Both edges (contact positioning side)
73 Connecting portion 77A, 77B Bending curved surface 81A-81D Planar portion 83A-83D Conical bending curved surface 85 Hopper-like product 85A Dividing part 87 Bending material development figure 95 Development curve 97, 105, 107 Auxiliary abutting piece figure 99A, 99B, 99C, 101A, 101B, 101C Contact positioning side 103 Connection portion

Claims (16)

  It is a bending material that is used to position the punch and die provided for the press brake at each desired pitch and to fold the bent line into a product with a bent curved surface at each desired pitch. When the bent body is bent at each desired pitch of the material body in the shape of the developed product to form the bent curved surface, the press brake can be contacted with a gauge member provided to move back and forth. An auxiliary abutting piece, and a contact positioning side for abutting and positioning the gauge member when a desired folding line is positioned at the bending position by the punch and die. A bending material characterized in that the abutting positioning side and the desired folding line are formed in parallel.   2. The bending material according to claim 1, wherein the auxiliary abutting piece avoids a position of a bending line having a desired pitch, or when the auxiliary abutting piece is deformed by bending of the bending line. A bending material, wherein the bending material is connected to the material body at a position where the displacement in the front-rear direction of the contact positioning side is within an allowable error range.   The bending material according to claim 1 or 2, wherein a connecting portion between the material main body and the auxiliary abutting piece is in a half blank state.   4. The bending material according to claim 1, wherein a width dimension in the front-rear direction of the auxiliary abutting piece is larger than a V width dimension of a V groove in the die.   The bending material according to any one of claims 1 to 4, wherein the shape of the material main body is a rectangular shape, and the auxiliary abutting piece is provided in a central portion in a longitudinal direction of both side edges parallel to each other. Characteristic bending material. A bending method for forming the bending material according to claim 5 into a cylindrical shape,
(A) Every time one end side of a rectangular material body is brought into contact with a gauge member that can move back and forth in a press brake, and the gauge member is moved and positioned at a desired pitch in a direction close to a die provided in the press brake. Bending the material body to form a first curved surface on one end of the material body;
(B) The material body is bent every time the other end side of the material body is brought into contact with the gauge member, and the gauge member is moved and positioned at a desired pitch in the direction close to the die. 2 forming a curved surface;
(C) The material body is bent each time the positioning edge of the auxiliary abutment piece provided on each side edge of the material body is brought into contact with the gauge member, and the gauge member is moved and positioned in a direction close to the die at every desired pitch. Forming a third bending curved surface that is continuous with the first bending curved surface and a fourth bending curved surface that is continuous with the second curved surface, respectively.
(D) a step of bending the center part in the longitudinal direction of the both side edges to form the material body into a cylindrical shape;
(E) a step of separating the auxiliary abutting piece from the material body;
A bending method comprising the steps of:   7. The bending method according to claim 6, wherein a step of forming a fifth bending curved surface continuously with the third bending curved surface between the step (c) and the step (d) and the fourth bending curved surface. And a step of forming a sixth bent curved surface continuously.   The punch and die provided for the press brake are positioned at each desired pitch angle, and the folding line is bent at each desired pitch angle to bend into a product with a conical curved curved surface. A bending material for processing, and when the bending surface is formed by bending a bending line for each angle of a desired pitch of the material body in a shape in which the product is developed, the press brake moves back and forth. Auxiliary abutting pieces that can freely come into contact with a gauge member that is freely tiltable back and forth are provided, and when a desired fold line is positioned at the bending position by the punch and die on the auxiliary abutting pieces. A bending material comprising a contact positioning side for contact positioning with the gauge member, wherein the contact positioning side and the desired folding line are formed in parallel.   9. The bending material according to claim 8, wherein the auxiliary abutting piece is provided with a separate contact positioning side parallel to a separate bending line different from the desired bending line.   The bending material according to claim 8, wherein the auxiliary abutting piece has a contact positioning side that is different for each allowable angle range of the inclination angle of the gauge member in the front-rear direction. .   The bending material according to claim 8, 9 or 10, wherein the auxiliary abutting piece has a plurality of contact positioning sides whose inclination directions are opposite to each other. A bending method for forming a conical curved curved surface in a bending material having an auxiliary abutting piece on the material body,
(A) In a state where the contact positioning side of the auxiliary abutting piece provided for the bending material is in contact with the gauge member, the position of the desired folding line is positioned at the bending position by the punch and die, and the material body is folded. Bending process,
(B) The step of bending the material body every time the gauge member is inclined in the front-rear direction for each angle of the desired pitch, and the position of each fold line at the desired pitch angle is positioned at the bending position. ,
(C) a step of separating the auxiliary abutting piece from the material body;
A bending method comprising the steps of: Bending material graphic for bending the material body that is positioned at each desired pitch or every angle of the desired pitch with respect to the punch and die provided for the press brake to bend into a product with a curved surface A figure creation device for creating
A press brake data table preliminarily storing data of an allowable inclination angle in the front-rear direction of the gauge member provided in the press brake so as to be movable back and forth and tiltable in the front-rear direction and a width dimension in the front-rear direction of the V groove in the die;
A development view creating means for creating a development view of the product and describing a plurality of bending lines for each desired pitch or for each angle of the desired pitch in the development view;
A graphic data memory for storing graphic data of a developed view created by the developed view creating means;
Simulation means for displaying a developed view based on graphic data stored in the V groove and gauge member of the die stored in the press brake data table and graphic data memory corresponding to the bending process;
A drawing means for drawing an auxiliary abutting piece having a contact positioning side that comes into contact with the gauge member on the developed view displayed by the simulation means;
A graphic creation device characterized by comprising: It is a figure creation device that creates a bent material figure to bend into a cylindrical product by bending the material body positioned at a desired pitch with respect to the punch and die provided for the press brake. And
A development view creating means for creating a development view of the product and describing a plurality of folding lines in the development view for each desired pitch;
A contact positioning side that comes into contact with a gauge member provided in the longitudinal direction of the press brake so as to be able to move back and forth is defined as the folding line at the longitudinal center of both side edges of the development drawing created by the development drawing creation means. Drawing means for drawing the auxiliary abutment piece provided in parallel to the material body; and
A graphic data memory for storing graphic data of the developed drawing created by the developed drawing creating means and graphic data of the auxiliary abutment piece drawn by the drawing means;
A graphic creation device characterized by comprising: A product that has a cone-shaped bending curved surface by bending a bending line at each desired pitch angle on the material body that positions the punch and die for the press brake at each desired pitch angle A figure creation device for creating a figure of a bending material for bending into
A development view creating means for creating a development view of the material main body of the product and writing a bending line for each angle of a desired pitch in a portion that becomes a conical curved curved surface in the development view;
An auxiliary abutting piece having an abutting positioning side parallel to a desired fold line in a fold line for each angle of a desired pitch in the developed view of the material body created by the developed view creating means, the conical surface A drawing means for drawing in a state of being connected to the horizontal holding edge of the material main body that holds the horizontal during bending of the bent surface of the shape,
A graphic data memory for storing graphic data of the developed drawing created by the developed drawing creating means and graphic data of the auxiliary abutment piece drawn by the drawing means;
A graphic creation device characterized by comprising: Bending material graphic for bending the material body that is positioned at each desired pitch or every angle of the desired pitch with respect to the punch and die provided for the press brake to bend into a product with a curved surface A figure creation device for creating
A press brake data table preliminarily storing data of an allowable inclination angle in the front-rear direction of the gauge member provided in the press brake so as to be movable back and forth and tiltable in the front-rear direction and a width dimension in the front-rear direction of the V groove in the die;
A development view creating means for creating a development view of the material body in the product and describing a plurality of folding lines for each desired pitch or for each angle of the desired pitch in the development view;
A graphic data memory for storing drawing data of a developed drawing of the material body created by the developed drawing creating means;
An angle range in which a plurality of bending lines are described for each angle of a desired pitch is divided by an allowable inclination angle in the front-rear direction of the gauge member stored in the press brake data table, and the angle range is calculated as the allowable inclination angle. Computing means for dividing into a plurality of common abutment angles within a range;
When performing the bending process of each fold line described for each angle of the desired pitch, the horizontal holding side equivalent side of the developed view corresponding to the horizontal holding side part of the material body holding the horizontal state on the die When drawing the developed view of the auxiliary abutment piece, the drawing means for describing the contact positioning side parallel to the reference fold line at each of the common abutment angles on the auxiliary abutment piece;
A graphic creation device characterized by comprising:

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