JP4580661B2 - Sheet metal processing apparatus and bending method using sheet metal processing apparatus - Google Patents

Description

  The present invention relates to a sheet metal processing apparatus that performs sheet metal processing on a workpiece and a bending method using the sheet metal processing apparatus.

  For example, in a breath brake as a bending apparatus, which is one of conventional sheet metal processing apparatuses, a drive cylinder that drives a lower table (ram) to move the lower table (ram) up and down with respect to a fixed upper table. Are fixedly provided at three locations on the left, right, and center. And when performing an offset bending process, what determines the flow rate ratio of each drive cylinder, detecting a table inclination amount, and performs the balance correction of a lower table (ram) is known (patent document 1). .

  Further, in another breath brake as one of the conventional sheet metal processing apparatuses, for example, a bending processing apparatus, the upper table (ram) is moved to move the upper table (ram) in the vertical direction with respect to the fixed lower table. A motor to be driven and a ball screw type driving means are fixedly provided at three positions on the left, right, and center. Further, when bending a workpiece, there is also known one that performs bending while maintaining a horizontal state while detecting the amount of deflection (Patent Document 2).

Further, in another brace brake as one of the conventional sheet metal processing apparatuses, for example, a bending processing apparatus, the lower table (ram) is moved to move the lower table (ram) up and down with respect to the fixed upper table. A pair of left and right lower table (ram) driving means for driving is fixedly provided, and a crowning mechanism is provided on the lower table (ram) side. And there is a technology to correct the deflection of the mechanical system based on the input machining conditions (bending length, plate thickness, workpiece position). As mentioned above, the crowning mechanism is also located at the center of the lower table (ram) or fixed table It is also known that a similar problem occurs in performing appropriate correction for a workpiece machining position that is fixed and changes variously by step bending (Patent Document 3).
JP-A-7-32046 Utility model registration No. 2569126 Japanese Patent No. 3153638

  By the way, in recent years, high-mix low-volume production has become popular, and step bending has become the mainstream in bending, in order to be applied to various types of processing and to improve processing efficiency. Therefore, the processing position on the table of the workpiece processed by the press brake is not limited to the center, and the workpiece is sequentially processed while moving to a plurality of processing stations offset in the left-right direction.

  In other words, the position, area and size of the table that receives the reaction force from the workpiece change sequentially, and it has been difficult to sufficiently correct the mechanical system deflection with the ram driving device or crowning mechanism fixed to the table. .

  In addition, in the situation where the shape / size of the product is complicated, the demand for accessory processing for IT products has been increasing. Therefore, the frequency of machining widely performed from machining with extremely small machining tonnage to large machining as in the past has increased, and with conventional machines with uniform capacity tonnage, machining at high speed, high production, efficiency In particular, there is a problem that it cannot cope with energy saving, which has become an important issue in recent years.

  In step bending, a single machine is provided with a plurality of processing stations, and in order to perform a series of processing while repeating sequential movement, an operator (especially an unskilled person) can determine which processing position (processing station) ) Is confused as to whether or not it should be performed, and there arises a problem that work efficiency does not increase. Further, as the processing station moves, it becomes necessary to move the foot switch for starting the ram to the range where it can be started, so that it becomes heavy labor for the worker and the workability deteriorates. In addition, if rough positioning in the longitudinal direction is performed due to product complexity, there will be cases where parts other than the bending line are bent, and positioning accuracy of the workpiece in the longitudinal direction at each processing station will also be required, There has been no sheet metal processing machine that comprehensively solves such problems in step bending.

  The present invention has been made to solve the above-described problems.

In order to achieve the problem to be solved by the above invention, a sheet metal working apparatus according to the present invention uses either one of an upper table or a lower table as a fixed table, and the other table as a moving table with respect to the fixed table. The moving table is composed of a first moving table and a second moving table, the first moving table is provided so as to be movable up and down by a plurality of first moving table driving means, and the second moving table is The first moving table is provided so as to be vertically connected and separated by a table connecting and separating drive means, and an appropriate number of second moving tables can be moved vertically with respect to the first moving table. Two moving table drive means is arranged in the longitudinal direction of the second moving table between the first moving table and the second moving table. Freely moving position, it is provided on the first moving table side.

  In the sheet metal processing apparatus of the present invention, in the sheet metal processing apparatus, workpiece longitudinal direction machining position guiding means for navigating a worker with respect to a position of a machining station and a predetermined workpiece position in the longitudinal direction is moved in the longitudinal direction of the table. It is preferable that the positioning is provided.

  In the sheet metal processing apparatus of the present invention, in the sheet metal processing apparatus, a foot pedal for starting the second moving table is provided so as to be movable and positionable in the longitudinal direction of the table to a position where it can be started at the position of the processing station. Is preferred.

  According to the bending method of the present invention, either the upper table or the lower table is a fixed table, and the other table is a moving table with respect to the fixed table, and the moving table is a first moving table and a second moving table. The first moving table is vertically movable by a plurality of first moving table driving means, and the appropriate number of second moving table driving means provided on the first moving table side The second moving table is movable up and down with respect to the first moving table, and an appropriate number of second moving table driving means are provided so as to be movable in the longitudinal direction of the second moving table. On the other hand, in the sheet metal processing apparatus provided with a second movable table, a detachable table connection, and a separation drive means, When determining the bending order and calculating the required tonnage for each process, the table split and connection drive means connection mode / separation mode state specifications are selected by the table connection / separation determination means. In addition, based on the separation mode, the position and stroke of the second moving table driving means are calculated and the mold is determined by using the second moving table alone, and the second table driving means is driven to move to a predetermined stroke. The workpiece is bent.

  According to the bending method of the present invention, either the upper table or the lower table is a fixed table, and the other table is a moving table with respect to the fixed table, and the moving table is a first moving table and a second moving table. The second moving table is provided such that the first moving table can be moved up and down by a plurality of first moving table driving means, and an appropriate number of second movements provided on the first moving table side. The second moving table is movable up and down with respect to the first moving table by table driving means, and an appropriate number of second moving table driving means are provided so as to be movable in the longitudinal direction of the second moving table, A sheet metal processing apparatus comprising a second movable table coupled to a first movable table, a detachable table coupled, and a separation driving means. In addition, the bending order is determined from the product information, the required tonnage is calculated for each process, the table division, the connection mode / separation mode state specification of the connection drive means is selected by the table connection, separation determination means, and then the required In the case of the ton or more, based on the connection mode, the first moving table and the second moving table are connected, mold determination, mold layout, determination of the position of the second moving table driving means, crowning amount of the second moving table, After calculating the stroke of the first movement table, moving each axis and starting crowning, the stroke is moved to a predetermined stroke to bend the workpiece.

  According to the bending method of the present invention, either the upper table or the lower table is a fixed table, and the other table is a moving table with respect to the fixed table, and the moving table is a first moving table and a second moving table. The first moving table is vertically movable by a plurality of first moving table driving means, and the appropriate number of second moving table driving means provided on the first moving table side The second moving table is movable up and down with respect to the first moving table, and an appropriate number of second moving table driving means are provided so as to be movable in the longitudinal direction of the second moving table. On the other hand, in the sheet metal processing apparatus provided with a second movable table, a detachable table connection, and a separation drive means, Determine bending order, mold, mold layout, work longitudinal direction machining position guidance means and foot pedal longitudinal position for each process, start machining, work longitudinal direction machining position guidance means, foot The pedal is moved to a position in the longitudinal direction, and after the positioning in the longitudinal direction of the work longitudinal direction of the workpiece and the foot pedal is completed, the foot pedal is turned on and the second table is moved to a predetermined stroke. Is.

  As can be understood from the description of the means for solving the above problems, according to the present invention, the first moving table and the second moving table are divided into tables and connected based on the processing conditions (processing tonnage). Since the first moving table can be separated and connected by the driving means, for example, an upper mold is provided on the first moving table, for example, a lower mold is provided on the second moving table, and the second moving table is divided into tables and moved up and down by the connecting driving means. Thus, bending can be performed, and the number of processing stations can be increased without increasing the size of the machine (installation area).

  In addition, since the first moving table and the second moving table are divided into tables and can be separated and connected by the connecting drive means based on the processing conditions (processing tonnage), energy saving and high speed processing can be realized for the workpiece. Can do.

  By making the second table driving means (as a crowning mechanism in the case of connection) movable and positionable according to the workpiece machining position (machining region), the point of application of force to the workpiece is positioned on the workpiece machining region. Therefore, the distance between the blades in the workpiece existence area can be accurately realized at a distance corresponding to a predetermined angle in order to directly face the position that receives the reaction force from the workpiece.

  In step bend processing, the work longitudinal direction machining position guiding means for positioning the work position in the longitudinal direction and the foot pedal that can be positioned under the predetermined processing station are provided, so that comprehensive problems associated with movement of the processing station are provided. It can be solved and freed from heavy labor while improving work efficiency and accuracy.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  Referring to FIGS. 1 and 2, for example, a press brake 1 as a sheet metal processing apparatus includes a portal frame 3 that is erected, and the portal frame 3 includes left and right frames 3L and 3R and the left and right frames 3L. The upper frame 3U is provided on the upper part of 3R. Support frames 5L and 5R are attached to lower portions on the left and right sides of the upper frame 3U, respectively.

  A lower table 7 as a fixed table, for example, is provided at the lower part between the left frame 3L and the right frame 3R, and the upper part between the left frame 3L and the right frame 3R is movable up and down, for example. A first upper moving table (ram) 9 is provided as a movable table, and a first movable table as a movable table that is movable in the vertical direction is provided between the first upper table (ram) 9 and the lower table 7. Two upper moving tables (rams) 11 are provided.

  On the lower table 7, for example, a lower die (die) 15 is provided at an appropriate interval in the longitudinal direction of the lower table 7 (left and right direction in FIG. 1). A lower part of the second upper moving table (ram) 11 corresponds to the lower mold (die) 15 at an appropriate interval in the longitudinal direction (left and right direction in FIG. 1) of the second upper moving table (ram) 11. An upper die (punch) 17 is provided. A lower die (die) 15 is originally provided on the lower table 7 via a lower holder (die holder), and an upper holder (punch holder) is provided below the second upper moving table (ram) 11. An upper mold (punch) 17 is provided through the upper die, but is omitted in FIG. 1 for the sake of simplicity.

  The first upper moving table (ram) 9 is provided so as to be movable in the vertical direction by being guided by guide rails (not shown) that extend in the vertical direction before and after the inner sides of the left and right frames 3L and 3R. ing. On the support frames 5L and 5R, driving motors 19 and 21 as first upper moving table driving means are fixedly provided, and encoders 19E and 21E as position detecting means are provided on the driving motors 19 and 21, respectively. Is provided. The drive motors 19 and 21 are rotatably connected to upper ends of nut members 23 and 25 provided in U-shaped grooves cut in the left and right upper portions of the first upper moving table (ram) 9. Yes. Ball screws 27 and 29 extending in the vertical direction are screwed onto the nut members 23 and 25, respectively. The lower ends of the ball screws 27 and 29 are fixed to the first upper moving table (ram) 9 through a piece member.

  A central portion of the lower portion of the first upper moving table (ram) 9 has a concave shape, and the second upper moving table (ram) is interposed between the lower portion of the concave shape and the second upper moving table (ram) 11. A second upper moving table driving means 31 for moving the ram) 11 up and down is provided. More specifically, a first upper moving table (ram) 9 and a second upper moving table (ram) are respectively provided at a lower portion of the first upper moving table (ram) 9 and an upper portion of the second upper moving table (ram) 11. 11, guide rails 33 and 35 laid in the longitudinal direction are provided. For example, a U-shaped sliding member 37 is slidably provided in the guide rail 33 in the longitudinal direction of the first upper moving table (ram) 9. A driving motor 39 for the second upper moving table driving means 31 is provided below the sliding member 37, and this driving motor 39 is provided with an encoder 39E as position detecting means. A ball screw 41 extending in the vertical direction is rotatably connected to the drive motor 39, and a nut member 42 is screwed to the ball screw 41. An inverted U-shaped sliding member 43 is integrated with the lower portion of the nut member 42. Moreover, the sliding member 43 is slidably provided on the guide rail 35.

  Therefore, the second upper moving table driving means 31 is provided so as to be movable in the longitudinal direction (left and right direction in FIG. 1) of the second upper moving table (ram) 11. More specifically, as shown in FIG. 2, a moving drive motor 45 is provided on the right side of the rear surface of the first upper moving table (ram) 9 in FIG. The moving drive motor 45 is provided with an encoder 45E as position detecting means. A ball screw 47 extending in the left-right direction is connected to the driving motor 45 for movement, and the other end of the ball screw 47 is fixed to a support frame 49 attached to the first upper moving table (ram) 9. ing. A nut member 51 is screwed onto the ball screw 47. Moreover, the nut member 51 is fixed to the sliding member 37 via a bracket 53.

  The second upper moving table (ram) 11 is provided at the left and right lower portions of the first upper moving table (ram) 9 so as to be movable up and down with respect to a guide 55 extending downward. That is, table connection / separation driving means 57 are provided at the left and right lower portions of the first upper moving table (ram) 9. More specifically, a second upper moving table lifting cylinder 59 is provided as the table connection / separation driving means 57. The lower end of the rod 61 of the second upper moving table lifting cylinder 59 is fixed to the upper end of the second upper moving table (ram) 11.

  With the above configuration, when the drive motors 19 and 21 are driven, the nut members 23 and 25 are rotated, whereby the ball screws 27 and 29 screwed into the nut members 23 and 25 are lowered, and the first upper table (ram). 9 is lowered with respect to the lower table 7. The position at that time is detected by the encoders 19E and 21E. When the drive motor 39 is driven, the ball screw 41 is rotated to lower the nut member 42 and press the second upper moving table (ram) 11 via the sliding member 43, and then the second upper moving portion. The table (ram) 11 is lowered with respect to the lower table 7.

  Further, when the drive motor 45 for driving is driven, the nut member 51 is moved in the left-right direction by rotating the ball screw 47, and the second upper moving table driving means via the bracket 53 and the sliding members 37, 43. 31 is guided by the guide rails 33 and 35 in the left and right longitudinal directions, and is moved and positioned, and is appropriately moved and positioned based on the actual workpiece machining position. Therefore, the mechanical deflection (table deflection) resulting from the reaction force in the second upper moving table driving means 31 is canceled, and while cooperating with the left and right drive motors 19, 21 of the first upper moving table driving means, The distance between the blades corresponding to the target angle in the second upper moving table driving means 31 can be realized.

  Further, the first upper moving table (ram) 9 and the second moving upper table (ram) 11 are firmly connected by pulling up the rod 61 of the second upper table lifting cylinder 59 of the table connecting and separating drive means 57. In this state, the second upper moving table (ram) 11 is pressed downward by applying a predetermined amount of stroke (predetermined pressure) to the second upper moving table driving means 31. Can give a convex deflection. In other words, as shown in FIG. 3A, the first upper moving table (ram) 9 and the second moving upper table (ram) 11 are divided into tables and connected by driving of the connecting drive means 57. By moving and positioning the second upper moving table driving means 31 to the center in the left-right direction and driving the drive motors 19 and 21, the second upper moving table driving means 31 exhibits the crowning function and the crowning mechanism Thus, it is possible to perform full length support, high load bending processing, and low strain bending processing.

  Further, as shown in FIG. 3B, the first upper moving table (ram) 9 and the second moving upper table (ram) 11 are divided into tables and connected by driving of the connecting drive means 57. In the state where the drive motors 19 and 21 are stopped, the second upper moving table drive means 31 is moved and positioned to the left in the left-right direction, and is positioned at the bending center on the workpiece machining area. The bend bending process can be performed on the workpiece W by driving. In this case, the second upper table pulling cylinder 59 is turned off. Further, as shown in FIG. 3C, the second upper moving table driving means 31 is moved and positioned to the right in the left-right direction, and the second upper moving table (ram) 11 is divided into tables, and the connection driving means 57 By stepping down the rod 61 of the second upper moving table lifting cylinder 59, the drive motor 39 is driven in a state of being separated downward with respect to the first upper moving table (ram) 9, whereby the workpiece W is stepped. In addition, it can handle small items, high speed, high productivity, energy saving, and labor saving.

  Next, the operation of bending the workpiece based on the flowchart shown in FIG. 4 will be described. In FIG. 4, in step S1, product (CAD) information (work plate thickness, material, angle, bending length). 3) and a developed view are provided by the host controller. Then, in step S2, the bending order is determined based on the three-dimensional view and the developed view. Further, in step S3, the first upper table (ram) 9 is sequentially determined based on the processing tonnage / bending length for each process. The connection mode (ram integrated type) or separation mode (split type) between the first upper table (ram) 11 and the second upper table (ram) 11 can be selected (automatic or manual) by the table connection and separation determination means, and the ram integrated use / In each case of divided use, the type of mold and the mold layout (each processing station position) are determined, and the longitudinal position of the second upper moving table driving means 31 is determined based on the workpiece processing position.

  If the required tonnage is exceeded in step S4, the process proceeds to step S5, where the first upper table (ram) 9 and the second upper table (ram) 11 are connected and used. In step S6, the workpiece thickness, Based on the mechanical deflection shape calculated in advance from the length, tensile strength and workpiece longitudinal position (work offset amount), this deflection is offset, and the distance between the upper and lower table blades in the workpiece existing area corresponds to the target angle. The stroke of the pair of drive motors 19 and 21 and the stroke or pressure value (crowning amount) of the drive motor 39 are determined so that Note that the crowning amount can be appropriately varied according to the stroke amount or pressure (torque) of the drive shaft of the first upper table (ram) 9. In step S7, movement of each axis and crowning are started. In step S8, when the predetermined stroke is reached, the machining is finished.

  In step S4, if the required tonnage or less, the process proceeds to step S9, where the second upper moving table (ram) 11 alone is used. In step S10, the longitudinal position of the drive motor 39 is determined based on the workpiece machining position. The determination is made, and the stroke and mold layout corresponding to the target angle are determined. In step S11, the movement of each axis is started. In step S12, the machining is finished when a predetermined stroke is reached.

  For example, when the bending tonnage in a certain process is larger than a predetermined value (below the pressurization capacity of the second upper moving table (ram) 11), the first upper moving table (ram) 9 and the second upper moving table (ram) 11 And the left and right positions of the drive motor 39 (crowning mechanism) are determined based on the position of the workpiece machining area (FIGS. 3A and 3B). reference). Therefore, the presence of the drive motor 39 (crowning mechanism) on the machining area that changes for each process makes it possible to accurately realize the gap between the blades corresponding to the target angle. Therefore, when the first upper moving table (ram) 9 completes a predetermined stroke by the detection signals from the encoders 19E and 21E while the second upper moving table (ram) 11 gives a predetermined amount of crowning, the machining is finished. .

  Further, when the bending tonnage is smaller than a predetermined value (short material processing less than the pressurizing capacity of the second upper moving table (ram) 11) in a certain process, the first upper moving table (ram) 9 and the second upper portion Since the second upper moving table (ram) 11 can be used independently rather than being used in a connected state with the moving table (ram) 11, an energy saving effect and high-speed machining can be realized. After the drive motor 39 is positioned on the workpiece machining area, a predetermined stroke of the second upper moving table (ram) 11 is performed. In this case, the second upper table lifting cylinder 59 is turned off and does not function, and the second upper moving table (ram) 11 is guided by a guide 53 provided at the lower end of the first upper moving table (ram) 9. However, the machining ends when the predetermined stroke is completed (see FIG. 3C).

  In FIG. 1, the lower center portion of the first upper moving table (ram) 9 has a concave shape, and an appropriate space is provided between the second upper moving table (ram) 11. An upper die (punch) 17 is provided at the lower end of the first upper moving table (ram) 9, and a lower die (die) 15 is provided above the second upper moving table (ram) 11. It is also possible to perform bending by the cooperation of the upper mold (punch) 17 and the lower mold (die) 15 by moving the (ram) 11 in the vertical direction.

  Therefore, further increase in the number of processing stations can be realized without increasing the machine size, that is, without requiring an installation area, and it is possible to deal with a wider variety of products.

  FIG. 5 shows another embodiment instead of FIG. 5, parts that are the same as the parts in FIG. 1 are given the same reference numerals, and redundant descriptions are omitted. In FIG. 5, the second upper moving table (ram) 11 and the lower table 7 are provided with a plurality of processing stations including a plurality of upper molds 17 and a lower mold 15, and the step bend in which the processing stations sequentially move for each process. In machining, there is a case where the operator cannot instantly determine where the next process machining station is located. Therefore, on the front side of the lower table 7, the position of a predetermined machining station for each process (normal mold) The workpiece longitudinal direction machining position guiding means 63 for navigating the operator with respect to the position of the machining station and the predetermined workpiece position in the longitudinal direction so that the operator can position the workpiece at the left end of the lower table 7 in the longitudinal direction ( It is provided so as to be movable in the left-right direction in FIG. The lower mold 15 is positioned at a predetermined position by abutting against the work longitudinal direction machining position guiding means 63 by moving or positioning the work longitudinal direction machining position guiding means 63 in the left or right direction automatically or manually. Will be. Further, a back gauge 65 for positioning the workpiece in the front-rear direction is provided so as to be movable back and forth.

  A foot pedal 67 is provided between the left frame 3L and the right frame 3R so as to be movable in the longitudinal direction of the lower table 7 (left and right direction in FIG. 5) on the front side of the lower table 7. For example, a moving drive motor 69 is provided below the right frame 3R. One end of a ball screw 71 extending in the longitudinal direction of the lower table 7 (left and right in FIG. 5) is connected to the moving drive motor 69, and the other end of the ball screw 71 is attached to the lower portion of the left frame 3L. It is fixed to the bracket 73. A nut member 75 is screwed onto the ball screw 71, and the nut member 75 is fixed to the foot pedal 67. The left frame 3L is provided with an operation panel 79 via a bracket 77. A control device 80 for controlling the press brake 1 is provided at the rear of the right frame 3R.

  With the above configuration, when the movement drive motor 69 is driven, the ball screw 71 rotates and the foot pedal 67 is moved and positioned in the left-right direction via the nut member 75.

  Therefore, as the machining station moves, the foot pedal 67 (for lowering / raising the ram) that activates the second moving table 11 after positioning the workpiece is also moved and positioned at a position below the predetermined machining station for each process. Therefore, as in the prior art, it is not necessary for the operator to sequentially move the foot pedal 67 to a position where the foot pedal 67 can be activated at a predetermined processing station position, so that workability is greatly improved. In addition to the above example, the movement mechanism of the foot pedal 67 may be a motor, a pulley, a timing belt, or the like.

  In addition, since the foot pedal 67 automatically moves automatically, a laser beam (detecting an intruding object by shielding the laser beam) or the like for detecting whether or not an operator's foot or the like has entered the vicinity of the moving area during the movement of the foot pedal 67 is used. Intrusion detection means is provided, and a safety device is provided that can instantaneously stop the foot pedal 67 when the intrusion is detected, so that sufficient safety can be ensured.

  Next, the bending operation by the press brake 1 shown in FIG. 5 will be described with reference to the flowchart shown in FIG. 6. In step S15, product (CAD) information (workpiece thickness, material, angle, bending length). A three-dimensional view and a developed view are provided from the host control device. Then, in step S16, a bending order, a die, and a die layout (processing station) are determined based on the three-dimensional view and the development view. In step S17, the work longitudinal direction processing position guiding means 63, for each bending order, The longitudinal processing position of the foot pedal 67 is determined.

  In step S18, bending is started. In step S19, the workpiece longitudinal direction machining position guiding means 63 and the foot pedal 67 are moved and positioned to predetermined positions in each process. In step S20, the workpiece positioning and the positioning of the foot pedal 673 are completed. After the foot pedal 67 is turned on in step S21, the second upper moving table 11 is lowered in step S22.

  7 and 8 show another embodiment of the present invention. 7 and 8, the same parts as those in FIG. 7 and 8, in place of the upper mold 17 and the lower mold 15, the molding upper and lower molds 81 and 83, and the upper and lower molds 85 and 87 are used to form and drill the workpiece. Processing can be performed.

  In addition, this invention is not limited to embodiment mentioned above, It can implement in another aspect by making an appropriate change. In the present embodiment, the lower table 7 is fixed and the upper table 9 is movable in the vertical direction. However, the upper table 9 is fixed and the lower table 7 is movable in the vertical direction. Even the press brake 1 can be used. The number of driving motors 39 as the second upper moving table driving means 31 is not limited to one. For example, a plurality of driving motors 39 may be provided by a self-propelled rack and pinion system. Further, by providing a plurality of lower table crowning means such as hydraulic cylinders or wedges in the lower table 7 and controlling the lower table crowning means according to processing conditions, there is a further effect of making the distance between the blades uniform. I can expect.

It is a perspective view of the sheet metal processing apparatus of this invention. It is a back perspective view of the sheet metal processing apparatus in FIG. (A), (B), (C) is explanatory drawing which performs the process of the standard bending in a bending process, offset bending, and a step bend. It is a flowchart of the operation | movement which performs a bending process with the sheet-metal processing apparatus in FIG. It is a perspective view of another sheet metal processing apparatus which replaces FIG. It is a flowchart of the operation | movement which performs a bending process with the sheet-metal processing apparatus in FIG. FIG. 6 is a perspective view of another sheet metal processing apparatus instead of FIG. 5. FIG. 6 is a perspective view of another sheet metal processing apparatus instead of FIG. 5.

Explanation of symbols

1 Press brake (sheet metal processing equipment)
3 Gate frame 3L Left frame 3R Right frame 3U Upper frame 5L, 5R Support frame 7 Lower table (fixed table)
9 First upper table (ram, moving table)
11 Second upper table (ram, moving table)
15 Lower mold (die)
17 Upper mold (punch)
19, 21 Drive motor (first upper table drive means)
19E, 21E encoder (position detection means)
23, 25 Nut member 27, 29 Ball screw 31 Second upper moving table drive means 33, 35 Guide rail 37 Drive motor 39E Encoder (position detection means)
41 Ball screw 43 Nut member 45 Drive motor for movement 45E Encoder (position detection means)
47 Ball screw 49 Support frame 51 Nut member 53 Bracket 55 Guide 57 Table connection / separation drive means 59 Second upper table lifting cylinder 61 Rod 63 Work longitudinal direction machining position guiding means 65 Back gauge 67 Foot pedal 69 Motor for movement 71 Ball screw 73 Bracket 75 Nut member 77 Bracket 79 Operation panel 81 Molding upper mold 83 Molding lower mold 85 Drilling upper mold 87 Drilling lower mold

Claims (6)

One of the upper table and the lower table is a fixed table, and the other table is a moving table with respect to the fixed table. The moving table includes a first moving table and a second moving table. A moving table is provided so as to be movable up and down by a plurality of first moving table driving means, and the second moving table is connected to the first moving table by table connection, and is vertically connected and separated by separation drive means. is provided, the second moving table drive means suitable number of moving vertically the second moving table with respect to the first moving table, between the second moving table and the first moving table movably positioned in the longitudinal direction of the second movable table, characterized in that provided on the first moving table side Gold processing equipment.   2. A workpiece longitudinal machining position guiding means for navigating a worker with respect to a position of a machining station and a predetermined workpiece position in the longitudinal direction is provided so as to be movable and positionable in the longitudinal direction of the table. The sheet metal processing apparatus described.   3. A sheet metal working apparatus according to claim 1, wherein a foot pedal for activating the second moving table is provided so as to be movable and positionable in the longitudinal direction of the table to a position where it can be activated at the position of the machining station. .   One of the upper table and the lower table is a fixed table, and the other table is a moving table with respect to the fixed table. The moving table includes a first moving table and a second moving table. The moving table is provided so as to be movable up and down by a plurality of first moving table driving means, and the second moving table is moved by the appropriate number of second moving table driving means provided on the first moving table side. An appropriate number of second moving table driving means are provided so as to be movable in the vertical direction with respect to the table, and are movable in the longitudinal direction of the second moving table, and the second moving table is connected to the first moving table. In a sheet metal processing apparatus provided with separable table connection and separation drive means, the bending order is determined from product information and each process The required tonnage is calculated and the table division and connection mode / separation mode state specification of the connection drive means are selected by the table connection / separation determination means. By using the moving table alone, the position and stroke of the second moving table driving means are calculated, the die is determined, the second table driving means is driven, the workpiece is moved to a predetermined stroke, and the workpiece is bent. Bending method.   One of the upper table and the lower table is a fixed table, and the other table is a moving table with respect to the fixed table. The moving table includes a first moving table and a second moving table. The moving table is provided so as to be movable up and down by a plurality of first moving table driving means, and the second moving table is moved by the appropriate number of second moving table driving means provided on the first moving table side. An appropriate number of second moving table driving means are provided so as to be movable in the vertical direction with respect to the table, and are movable in the longitudinal direction of the second moving table, and the second moving table is connected to the first moving table. In a sheet metal processing apparatus provided with separable table connection and separation drive means, the bending order is determined from product information and each process The required tonnage is calculated, the table is divided, and the connection mode / separation mode state specification of the connection drive means is selected by the table connection / separation determination means. If the required tonnage is exceeded, the first moving table is selected based on the connection mode. And the second moving table are connected, mold determination, mold layout, determination of the position of the second moving table driving means, crowning amount of the second moving table, calculation of the stroke of the first moving table, A bending method characterized in that after starting movement and crowning, the workpiece is moved to a predetermined stroke to bend the workpiece.   One of the upper table and the lower table is a fixed table, and the other table is a moving table with respect to the fixed table. The moving table includes a first moving table and a second moving table. The moving table is provided so as to be movable up and down by a plurality of first moving table driving means, and the second moving table is moved by the appropriate number of second moving table driving means provided on the first moving table side. An appropriate number of second moving table driving means are provided so as to be movable in the vertical direction with respect to the table, and are movable in the longitudinal direction of the second moving table, and the second moving table is connected to the first moving table. In a sheet metal processing device equipped with separable table connection and separation drive means, bending order, mold, mold layout from product information Determine the workpiece longitudinal direction machining position guiding means and foot pedal longitudinal position for each process, start machining, and move the workpiece longitudinal direction machining position guiding means and foot pedal to the longitudinal position. The bending method is characterized in that, after completion of positioning of the work longitudinal direction machining position guiding means and the foot pedal in the longitudinal direction, the foot pedal is turned on and the second table is moved to a predetermined stroke.

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