JP7105126B2 - Plate material processing machine and plate material processing method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material processing machine or the like that performs processing such as punching on a plate material (sheet metal).

A plate material processing machine such as a punch press or a laser processing machine includes a plate material positioning unit that positions a plate material in the X-axis direction and the Y-axis direction with respect to a processing position. A brief description of the configuration of the plate positioning unit is as follows.

A body frame in the plate material processing machine is provided with a carriage movably in the X-axis direction and the Y-axis direction. The carriage is moved in the X-axis direction and the Y-axis direction by driving an X-axis motor and a Y-axis motor as XY-axis moving means. In addition, the carriage is provided with a plurality of clamps that hold (grab) the ends of the plate (the ends in the Y-axis direction).

Patent document 1 discloses a prior art related to the present invention.

Japanese Unexamined Patent Application Publication No. 2018-1258

By the way, the width dimension (dimension in the X-axis direction) of the plate material to be processed varies. The amount of overhang of the plate increases. As a result, the plate is likely to wobble during positioning of the plate, leading to a decrease in processing accuracy of the plate. Therefore, usually, before setting the origin of the plate material, a setup work (clamp placement setup work) is performed to change the arrangement of multiple clamps with respect to the carriage so that the amount of overhang of the plate material during processing is reduced. there is

However, the setup work for clamp placement takes a lot of time, so when processing various plate materials with different widths, increasing the number of setup work for clamp placement reduces the productivity of the plate processing machine. lead to decline.

That is, when processing various plate materials having different widths, there is a problem that it is difficult to increase the productivity of the plate material processing machine while sufficiently ensuring the processing accuracy of the plate materials.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a punch press or the like having a novel configuration that can solve the aforementioned problems.

A plate material processing machine (sheet metal processing machine) according to a first embodiment of the present invention includes a carriage that can move in the X-axis direction and the Y-axis direction with respect to a processing position, and a carriage that moves in the X-axis direction and the Y-axis direction. at least three or more clamps provided on the carriage for gripping the edge of the plate, clamp arrangement information indicating the arrangement of the plurality of clamps with respect to the carriage, and width of the plate a gripping change determination unit that determines whether or not gripping of the plurality of clamps needs to be changed after setting the origin of the plate based on the dimensions.

In the first aspect of the present invention, the re-grip determination unit acquires re-grip amounts of the plurality of clamps when it is determined that re-gripping of the plurality of clamps is necessary after setting the origin of the plate material. may

In the first embodiment of the present invention, the re-gripping determination unit includes a clamp selection unit that selects the plurality of clamps to be used during processing based on the clamp arrangement information and the width dimension of the plate material, and Except when the plurality of clamps and the plurality of clamps used when setting the origin completely match, the gripping amount of the plurality of clamps is calculated based on the clamp arrangement information and the width dimension of the plate material. and a quantity calculator.

In the first embodiment of the present invention, the table storage unit stores a re-gripping amount table showing the relationship between the width dimension of the plate material and the re-gripping amounts of the plurality of clamps under the condition that the clamp arrangement information is set in advance. The re-grip determination unit refers to a re-grip amount table of the plurality of clamps, and based on the width dimension of the plate material, determines the clamps to be used during processing and the re-grip amounts of the plurality of clamps. may be obtained.

In the first embodiment of the present invention, plate material holding means for holding (pressing and holding) the plate material immovably in the X-axis direction and the Y-axis direction, and re-holding of the plurality of clamps after the plate material is set to the origin are required. When it is determined that the plate material is held so as not to move in the X-axis direction and the Y-axis direction, the re-gripping operation of the plurality of clamps is performed based on the re-gripping amount of the plurality of clamps. , and a regrinding control section for controlling the XY-axis moving means.

According to the first aspect of the present invention, the re-holding determination unit determines whether re-holding of the plurality of clamps is necessary after setting the origin of the plate based on the clamp arrangement information and the width of the plate. to decide. Then, when it is determined that re-grasping of the plurality of clamps is necessary after setting the origin of the plate material, re-grasping operation of the plurality of clamps is performed after (immediately after) the origin setting of the plate material. As a result, when processing various plate materials having different widths, it is possible to reduce the amount of overhang of the plate material during processing without performing setup work for changing the arrangement state of the plurality of clamps with respect to the carriage. .

A plate material processing method (sheet metal processing method) according to the second embodiment of the present invention is based on clamp arrangement information indicating the arrangement state of a plurality of clamps with respect to a carriage in a material processing machine and the width dimension of the plate material. After determining whether or not it is necessary to re-hold the plurality of clamps after setting, the plate material is processed.

In the second embodiment of the present invention, when it is determined that re-gripping of the plurality of clamps is necessary after setting the origin of the plate material, based on the acquired re-gripping amounts of the plurality of clamps, the plurality of A regripping motion of the clamp may be performed.

According to the second aspect of the present invention, whether or not it is necessary to re-grip the plurality of clamps after setting the origin of the plate is determined based on the clamp arrangement information and the width of the plate. Then, when it is determined that re-grasping of the plurality of clamps is necessary after setting the origin of the plate material, re-grasping operation of the plurality of clamps is performed after (immediately after) the origin setting of the plate material. As a result, when processing various plate materials having different widths, it is possible to reduce the amount of overhang of the plate material during processing without performing setup work for changing the arrangement state of the plurality of clamps with respect to the carriage. .

According to the present invention, when processing various plate materials having different widths, it is possible to increase the productivity of the plate material processing machine while sufficiently ensuring the processing accuracy of the plate materials.

FIG. 1 is a view taken along line I--I in FIG. FIG. 2 is a schematic left side view showing the punch press according to the embodiment of the invention. 3 is an enlarged view of part III in FIG. 1. FIG. FIG. 4 is a control block diagram of the punch press according to the embodiment of the invention. FIGS. 5(a) and 5(b) are schematic plan views for explaining a plurality of clamps used during processing and a re-gripping operation of the plurality of clamps. FIGS. 6(a) and 6(b) are schematic plan views for explaining a plurality of clamps used during processing and a re-gripping operation of the plurality of clamps. FIGS. 7(a) and 7(b) are schematic plan views for explaining a plurality of clamps used during processing and a re-gripping operation of the plurality of clamps. FIG. 8 is a flow chart for explaining the operation of the embodiment of the present invention and the plate material processing method according to the embodiment of the present invention. FIG. 9 is a flow chart diagram explaining the operation of the embodiment of the present invention. FIG. 10 is a control block diagram of a punch press according to a modification of the embodiment of the invention. FIG. 11 is a diagram showing a regrind amount table.

Hereinafter, embodiments of the present invention and modifications of the embodiments of the present invention will be described with reference to the drawings.

In the specification and claims of the present application, the term "provided" includes both direct provision and indirect provision via a separate member. The "overhang amount of the plate material during processing" is defined as the two outermost clamps (both ends in the X-axis direction) of the plurality of clamps that grip the edge of the plate material. Refers to the dimension of the part in the X-axis direction. "And/or" means including either one and both of the two. Also, in the embodiment of the present invention, it is defined as follows. is one of the horizontal directions indicated by , and is also called the left-right direction. The “Y-axis direction” is one of the horizontal directions indicated by an arrow or the like in the drawings and is a direction orthogonal to the X-axis direction, and is also referred to as the front-rear direction. In the drawings, "FF" stands for forward direction, "FR" for rearward direction, "L" for left direction, "R" for right direction, "U" for upward direction, "D" for Each pointing downward.

(Embodiment of the present invention)
As shown in FIGS. 1 to 3, a punch press 10 according to an embodiment of the present invention is a plate material processing machine (sheet metal processing machine) that punches a plate material (sheet metal) W, such as punching. The punch press 10 also includes a bridge-type body frame 12, and the body frame 12 has support frames 14 extending in the Y-axis direction on both sides (left and right sides) thereof in the X-axis direction. .

The body frame 12 is provided with a table unit (table device) 16 that supports the plate material W on the pass line (support height position or transport height position) PL. The table unit 16 includes a fixed table and a movable table. etc. Specifically, a center fixed table 18 is provided in the central portion of the body frame 12, and a movable table 20 is provided on each support frame 14 so as to be movable in the Y-axis direction. A fixed side table 22 is provided on the left or right side of the movable table 20 . The center fixed table 18, each movable table 20, and each side fixed table 22 each have a large number of brushes (not shown) and a plurality of free ball bearings (not shown) for supporting the plate material W. .

A locating pin 24 for setting the plate material W at the origin position in the X-axis direction is provided on the left side of one side fixed table 22 . The locating pin 24 has an abutment surface 24f against which the end surface (left end surface) of the plate material W on the X-axis direction side can be abutted. is located at the origin of The locate pin 24 is configured to be vertically movable so as to appear and disappear with respect to the pass line PL.

The body frame 12 is provided with a plate material positioning unit (plate material positioning mechanism) 26 that positions the plate material W in the X-axis direction and the Y-axis direction. A specific configuration of the plate positioning unit 26 is as follows.

A carriage base 28 extending in the X-axis direction is provided on the lower portion of the body frame 12 so as to be movable in the Y-axis direction. The carriage base 28 is integrally connected to the front portions of the pair of movable tables 20 . A Y-axis motor 30 for moving the carriage base 28 integrally with the pair of movable tables 20 in the Y-axis direction is provided on the upper front portion of the body frame 12 . A Y-axis ball screw 32 extending in the Y-axis direction is rotatably provided on the upper portion of the body frame 12 . One end of the Y-axis ball screw 32 is interlocked with an output shaft (not shown) of the Y-axis motor 30 . A nut member 34 screwed onto the Y-axis ball screw 32 is provided at an appropriate position on the carriage base 28 .

A carriage 36 is provided on the carriage base 28 so as to be movable in the X-axis direction. An X-axis motor 38 for moving the carriage 36 in the X-axis direction is provided on the right end side of the carriage base 28 . An X-axis ball screw 40 extending in the X-axis direction is rotatably provided inside the carriage base 28 . One end of the X-axis ball screw 40 is interlocked with an output shaft (not shown) of the X-axis motor 38 . A nut member 42 screwed onto an X-axis ball screw 40 is provided at an appropriate position on the carriage 36 .

Here, the carriage 36 is movable in the X-axis direction and the Y-axis direction with respect to the processing position PP. The X-axis motor 38 and the Y-axis motor 30 correspond to XY-axis moving means for moving the carriage 36 in the X-axis direction and the Y-axis direction.

As shown in FIG. 3, on the front side of the carriage 36, there are four clamps 44 (44 ₁ to 41 ₄ ) for holding (grasping) the end (front end) of the plate material W in the Y-axis direction. It is provided so that the position can be adjusted. A second clamp 44 ₂ and a third clamp 44 ₃ are sequentially positioned between a first clamp 44 ₁ on the left end side of the carriage 36 and a fourth clamp 44 ₄ on the right end side of the carriage 36 .

Each clamp 44 (44 ₁ to 41 ₄ ) can release and grip the edge of the plate W by opening and closing the lower clamp claw 48 and the upper clamp claw 50 . In order to set (position) the plate material W at the origin position in the X-axis direction, each clamp 44 has an abutment member 54 capable of abutting the end face (front end face) of the plate material W on the Y-axis direction side. ing. When setting the origin of the plate material W, the plate material W is brought into contact with the locating pin 24 and the abutment member 54 of each clamp 44 to position the plate material W at the origin position in the X-axis direction and the Y-axis direction. can be done. In addition, although the number of clamps 44 is four in the embodiment of the present invention, the number may not be four as long as the number is three or more.

As shown in FIGS. 1 and 2, on both sides (left side and right side) of the body frame 12 in the X-axis direction, plate material holding units (plate material holding mechanisms) for holding (pressing and holding) the plate material W from above are provided. 56 are provided respectively. Each plate material holding unit 56 has a holding cylinder 58 provided on the side of the body frame 12 in the X-axis direction. Each plate material holding unit 56 has a holding pad 62 provided at the tip of an operating rod 60 that can move up and down (movable in the vertical direction) in each holding cylinder 58 . A support pad 64 is provided vertically below (immediately below) each holding pad 62 on the center fixed table 18 to sandwich the plate material W in cooperation with each holding pad 62 .

Here, the pair of plate material holding units 56 corresponds to plate material holding means for holding (pressing and holding) the plate material W relative to the center fixed table 18 so as not to move in the X-axis direction and the Y-axis direction.

An upper turret 68 holding a plurality of punch dies 66 is rotatably provided on the upper rear portion of the body frame 12 . A lower turret 72 holding a plurality of die molds 70 is rotatably provided on the lower rear portion of the body frame 12 . Optional punch 66 and optional die 70 are indexable to working position PP by rotation of upper turret 68 and lower turret 72 . Further, on the upper part of the rear side portion of the body frame 12, a striker 74 for pressing (strikes) the punch die 66 indexed to the processing position PP from above is provided so as to be able to move up and down (movable in the vertical direction). there is

With the above-described configuration, the carriage 36 is moved in the X-axis direction and/or the Y-axis direction by driving the X-axis motor 38 and/or the Y-axis motor 30 while the ends of the plate material W are gripped by the plurality of clamps 44. . Then, the plate material W is moved in the X-axis direction and/or the Y-axis direction and positioned with respect to the processing position PP. Then, while positioning the plate material W with respect to the processing position PP, the punch die 66 indexed to the processing position PP is pressed from above by the striker 74 . As a result, the punching die 66 and the die die 70 cooperate to punch the plate material W. As shown in FIG.

As shown in FIGS. 4 to 7(a) and (b), the punch press 10 is provided with a programming device 76 for creating a machining program. The program creation device 76 is composed of a computer having a CPU and a memory. The programming device 76 has an input section 78 comprising a touch panel, keyboard, mouse and the like. The input unit 78 inputs clamp placement information indicating the placement state of the plurality of clamps 44 (44 ₁ to 41 ₄ ) with respect to the carriage 36, and the width dimension (the dimension in the X-axis direction) K of the plate material W based on the operator's input operation. Enter The program creation device 76 may be provided integrally with the punch press 10, or may be provided separately from the punch press 10, and the created machining program may be delivered to the NC device 86 described later via a network or medium.

Here, the clamp arrangement information includes, for example, the distance CLa from the left end of the carriage 36 (the same position in the X-axis direction as the left end surface of the plate W that abuts against the locate pin 24) to the center of the first clamp 44 ₁ , and each clamp ( Center) distance CLb from the center of the first clamp 44 ₁ to the center of the second clamp 44 ₂ , distance CLc from the center of the second clamp 44 ₂ to the center of the third clamp 44 ₃ , and distance CLc from the center of the second clamp 44 2 to the center of the third clamp 44 3 and the distance CLd from the center of 44 ₃ to the center of the fourth clamp 44 ₄ . Based on the clamp arrangement information, the programming device 76 further determines the distance CLe from the center of the first clamp 44 ₁ to the center of the third clamp 44 ₃ as the distance between each clamp (center), and the distance CLe from the center of the first clamp 44 ₁ to the center of the first clamp 44 1 . to the center of the fourth clamp 44 ₄ .

The input unit 78 inputs the distance CLe from the center of the first clamp 44 ₁ to the center of the third clamp 44 ₃ and the distance CLf from the center of the first clamp 44 ₁ to the center of the fourth clamp 44 ₄ . good too. Alternatively, the distance between the left end of the carriage 36 and the center of each clamp 44 may be input to calculate the distance between each clamp (center). Further, the clamp arrangement information may be automatically input by detecting the clamp mounting position with respect to the carriage 36 with a sensor or the like instead of the input operation of the input unit 78 .

The program creation device 76 includes a re-gripping determination unit 80, and the re-gripping determination unit 80 determines whether re-gripping of the plurality of clamps 44 is necessary after the plate material W is set to the origin. The re-gripping determination unit 80 determines the number of clamps 44 that grip the plate material W, further selects the clamps 44, and calculates (obtains) re-gripping amounts from the gripping positions of the plurality of clamps 44 when the origin is set. . Based on the clamp arrangement information and the width dimension K of the plate material W, the re-gripping determination unit 80 determines the amount of re-gripping of the plurality of clamps 44 for reducing the overhang amount λ of the plate material W during processing (during punching). (Change amount of gripping position) δ is obtained by calculation. Further, the re-gripping determination unit 80 includes a clamp selection unit 82 and a re-gripping amount calculation unit 84 . The contents of the clamp selection unit 82 and the re-gripping amount calculation unit 84 are as follows.

The clamp selection unit 82 determines the number of clamps 44 to be used during processing based on the input clamp arrangement information and the width dimension K of the plate material W. FIG.

Specifically, when the conditional expression is K<CLa+CLe+V, the clamp selection unit 82 determines the number of clamps 44 to be used during processing to be two (FIGS. 5A, 5B and 6A). )reference). If the conditional expression is CLa+CLf+V>K≧CLa+CLe+V, the clamp selection unit 82 determines three clamps 44 to be used during processing (see FIGS. 6B, 6B, and 7A). . If K≧CLa+CLf+V as a conditional expression, the clamp selection unit 82 determines the number of clamps 44 to be used during processing to be four (the total number of clamps 44) (see FIG. 7B). Here, V is the width dimension of the gripping portion of the clamp 44 (upper clamp claw 50). These conditional expressions are stored in advance in the memory of the program creating device 76 in consideration of the size of the punch press 10, the size of the plate material W that can be processed by the punch press 10, the number of clamps 44, and the like. there is

If the number of clamps 44 to be used during processing is four as a result of the previous process (determining the number of clamps), the clamp selection unit 82 selects all the clamps 44 ₁ to 44 as the plurality of clamps 44 to be used during processing. Select ₄ (see FIG. 7(b)). In this case, the re-gripping determination unit 80 determines that the plurality of clamps 44 to be used during machining and the plurality of clamps 44 to be used when setting the origin completely match, and that re-gripping of the plurality of clamps 44 is unnecessary. do.

If the number of clamps 44 to be used during processing is not four as a result of the previous process (clamp number determination) processing, the clamp selection unit 82 selects the plate material during processing based on the clamp arrangement information and the width dimension of the plate material W. One of a plurality of clamps 44 to be used during processing is selected in order to reduce the amount of overhang.

When the number of clamps 44 to be used during processing in the previous process is determined to be two, the clamp selection unit 82 determines which of the following three clamp selection methods applies.

First, when the clamp selection unit 82 determines that the conditional expression K−(CLa+CLb)<(K−CLc)/2≦(K−CLd)/2, the clamp selection unit 82 selects a plurality of clamps 44 to be used during processing. , the first clamp 44 ₁ and the second clamp 44 ₂ are selected (see FIG. 5(a)). In this case, the re-gripping determination unit 80 determines that the plurality of clamps 44 to be used during machining and the plurality of clamps 44 to be used when setting the origin completely match, and that re-gripping of the plurality of clamps 44 is unnecessary. do.

Secondly, the clamp selection unit 82 determines that the conditional expression (K−CLd)/2<K−(CLa+CLb)≦(K−CLc)/2 is satisfied, and that it is necessary to re-grip the plurality of clamps 44. If so, the third clamp 44 ₃ and the fourth clamp 44 ₄ are selected as the plurality of clamps 44 to be used during processing (see FIG. 5(b)). Thirdly, the clamp selection unit 82 determines that the conditional expression (K−CLc)/2<K−(CLa+CLb)≦(K−CLd)/2 is satisfied, and that the plurality of clamps 44 need to be gripped again. If so, the second clamp 44 ₂ and the third clamp 44 ₃ are selected as the plurality of clamps 44 to be used during processing (see FIG. 6(a)).

When the number of clamps 44 to be used during processing in the previous process is determined to be three, the clamp selection unit 82 determines which of the following two clamp selection methods applies.

First, when the clamp selection unit 82 determines that the conditional expression K−(CLa+CLe)≦(K−CLc−CLd)/2 is satisfied, the clamp selection unit 82 selects the first clamp 44 as the plurality of clamps 44 to be used during processing. ₁ , the second clamp 44 ₂ and the third clamp 44 ₃ (see FIG. 6(b)). In this case, the re-gripping determination unit 80 determines that the plurality of clamps 44 to be used during machining and the plurality of clamps 44 to be used for origin setting are completely matched, and re-gripping of the plurality of clamps 44 is unnecessary. do.

Secondly, when the clamp selection unit 82 determines that the conditional expression (K−CLc−CLd)/2<K−(CLa+CLe) is satisfied and it is necessary to re-grip the clamps 44, A second clamp 44 ₂ , a third clamp 44 ₃ and a fourth clamp 44 ₄ are selected as the plurality of clamps 44 to be used during processing (see FIG. 7(a)).

Furthermore, the regripping amount calculation unit 84 calculates the width of the workpiece W based on the clamp arrangement information and the width dimension of the plate material W, except when the clamps 44 used during processing and the clamps 44 used when setting the origin completely match. , the amount of re-gripping (amount of change in gripping position) δ of the plurality of clamps 44 is calculated. In other words, when the re-gripping determination unit 80 determines that re-gripping of the plurality of clamps 44 after setting the origin of the plate material W is necessary, the clamps 44 used when setting the origin are selected from the clamps 44 used during processing. A re-gripping amount δ for re-gripping with a plurality of clamps 44 is calculated.

Specifically, when the third clamp 44 ₃ and the fourth clamp 44 ₄ are selected as the plurality of clamps 44 to be used during machining, the re-grip amount calculator 84 calculates the re-grip amount δ=CLa+CLb+CLc+CLd. /2-K/2 is used to calculate the re-gripping amount .delta. Further, when the second clamp 44 ₂ and the third clamp 44 ₃ are selected as the plurality of clamps 44 to be used during processing, the re-grip amount calculator 84 calculates the re-grip amount δ=CLa+CLb+CLc/2− The regripping amount δ of the plurality of clamps 44 is calculated by the formula of K/2 (see FIG. 6(a)). Furthermore, when the second clamp 44 ₂ , the third clamp 44 ₃ , and the fourth clamp 44 ₄ are selected as the plurality of clamps 44 to be used during processing, the re-grip amount calculator 84 calculates the re-grip amount The regripping amount δ of the plurality of clamps 44 is calculated by the formula δ=CLa+CLb+CLc/2+CLd/2−K/2 (see FIG. 7(a)).

In other words, the re-gripping determination unit 80 is based on the clamp arrangement information and the width dimension K of the plate material W, except when the plurality of clamps 44 used during processing completely match the plurality of clamps 44 used when setting the origin. , the regripping amount δ of the plurality of clamps 44 is obtained by calculation. Further, when the plurality of clamps 44 used during machining completely match the plurality of clamps 44 used when setting the origin, the re-grip determination unit 80 sets the re-grip amount δ of the plurality of clamps 44 to zero (0). to get Then, the program creating device 76 converts the machining program to which the gripping amount δ of the plurality of clamps 44 is added into NC data.

The punch press 10 operates the plate material positioning unit 26 (the X-axis motor 38, the Y-axis motor 30, each clamp cylinder 52) and the plate material holding unit 56 (each holding cylinder 58) based on the machining program output from the programming device 76. ) is provided with an NC device 86 for controlling the The NC device 86 is composed of a computer having a CPU and memory.

The NC device 86 has a function as a grip change control section 88 . If the re-grip amount δ is not zero (“0”), the re-grip control unit 88 executes re-grip operation of the plurality of clamps 44 immediately after setting the origin of the plate material W in the X-axis direction and the Y-axis direction. The regripping control unit 88 controls the X-axis motor 38 and the Y-axis motor 30 to position the plate material W at a position where the plate material holding unit 56 can hold it. Thereafter, the regripping control unit 88 controls the holding cylinders 58 to hold (press and hold) the plate material W on the center fixed table 18 so that it cannot move in the X-axis direction and the Y-axis direction. Further, the gripping control unit 88 releases the gripping state of the plate material W by the plurality of clamps 44, controls the X-axis motor 38 and the Y-axis motor 30 based on the gripping amount δ, and controls the carriage 36 (the plurality of clamps). 44) is moved. Finally, by gripping the plate material W with the plurality of clamps 44, the re-gripping operation of the plurality of clamps 44 is completed.

Next, the operation of the embodiment of the present invention including the plate material processing method according to the embodiment of the present invention will be described. A plate material processing method according to an embodiment of the present invention is a method for punching a plate material W. As shown in FIG.

The clamp selection unit 82 determines the number of clamps 44 to be used during processing based on the clamp arrangement information and the width dimension K of the plate material W by calculation (step S101 in FIG. 8). When the clamp selection unit 82 calculates (determines) that the number of clamps 44 to be used during processing is four (Yes in step S102 in FIG. 8), the clamp selection unit 82 selects the clamps 44 to be used during processing. select all the clamps 44 ₁ to 44 ₄ as (step S103 in FIG. 8). Further, the re-gripping determination unit 80 obtains zero "0" as the re-gripping amount δ of the plurality of clamps 44, and determines that re-gripping of the plurality of clamps 44 is unnecessary (step S104 in FIG. 8).

When the clamp selection unit 82 calculates (determines) that the number of clamps 44 to be used during processing is two (when No in step S102 in FIG. 8 and when Yes in step S105), the clamp arrangement Based on the information and the width dimension K of the plate material W, two clamps 44 are selected by calculation (step S106 in FIG. 8). Then, when the plurality of clamps 44 used during machining do not completely match the plurality of clamps 44 used when setting the origin (No in step S107 in FIG. 8), the regripping amount calculator 84 determines the clamp arrangement. Based on the information and the width dimension K of the plate material W, the regripping amount δ of the plurality of clamps 44 is calculated (step S108 in FIG. 8). In other words, the re-gripping determination unit 80 calculates the re-gripping amount δ of the plurality of clamps 44 when determining that re-gripping of the plurality of clamps 44 is necessary.

On the other hand, when the plurality of clamps 44 used during machining completely match the plurality of clamps 44 used when setting the origin (Yes in step S107 in FIG. 8), the gripping change determination unit 80 Zero "0" is obtained as the amount of re-gripping .delta.

When the clamp selection unit 82 calculates (determines) that the number of clamps 44 to be used during processing is three (when No in step S102 in FIG. 8 and when No in step S105), the clamp arrangement Based on the information and the width dimension K of the plate material W, three clamps 44 are selected (step S110 in FIG. 8). Then, when the plurality of clamps 44 used during machining do not completely match the plurality of clamps 44 used when setting the origin (No in step S111 in FIG. 8), the regripping amount calculator 84 determines the clamp arrangement. Based on the information and the width dimension K of the plate material W, the regripping amount δ of the plurality of clamps 44 is calculated (step S112 in FIG. 8). In other words, the re-gripping determination unit 80 calculates the re-gripping amount δ of the plurality of clamps 44 when determining that re-gripping of the plurality of clamps 44 is necessary.

On the other hand, when the plurality of clamps 44 used during machining completely match the plurality of clamps 44 used when setting the origin (Yes in step S111 in FIG. 8), the gripping change determination unit 80 Zero "0" is obtained as the amount of re-gripping .delta.

After steps S104, S108, S109, S112, and S113 in FIG. 8 are completed, the program creation device 76 converts the machining program to which the re-gripping amount δ of the plurality of clamps 44 is added into NC data (step S114 in FIG. 8). . Then, the program creating device 76 outputs the machining program to the NC device 86 (step S115 in FIG. 8).

After that, the carriage base 28 is moved by driving the Y-axis motor 30, and the carriage 36 is moved by driving the X-axis motor 38, so that they are positioned on the origin position side. Next, the end face of the plate material W on the X-axis direction side is abutted against the locate pin 24 , and the end face of the plate material W on the Y-axis direction side is abutted against the abutting member 54 . Then, the end portion of the plate material W on the Y-axis direction side is gripped (held) by a plurality of clamps 44 . As a result, the plate W can be positioned at the origin position in the X-axis direction and the Y-axis direction (origin setting) (step S201 in FIG. 9).

After setting the origin of the plate material W, the program operation of the punch press 10 is started (step S202 in FIG. 9). Next, if the re-grip amount δ of the clamps 44 is not zero “0” (No in step S203 in FIG. 9), the re-grip control unit 88 operates the X-axis motor 38 and the Y-axis motor 30. Control is performed to position the plate material W at the lower position on the side of the plate material holding unit 56 (step S204 in FIG. 9). Then, the regripping control unit 88 controls the holding cylinders 58 to hold (press and hold) the plate material W on the center fixed table 18 so as not to move in the X-axis direction and the Y-axis direction (step S205 in FIG. 9). ). Furthermore, the re-grip control unit 88 executes re-grip operations for the plurality of clamps 44 by controlling the X-axis motor 38 and the Y-axis motor 30 based on the re-grip amount δ of the plurality of clamps 44 (Fig. step S206 in 9).

5(b), 6(a), and 7(a) show the relationship between the plate material W and the clamps before and after the gripping operation. represents the relationship with the clamp 44 when set at the origin position, and the plate material W indicated by the solid line represents the positional relationship with the clamp 44 after the completion of the gripping operation. 5(a), 6(b), and 7(b), when the re-gripping amount is zero (0) (no re-gripping required), the plate material W indicated by the solid line is set at the origin position. It represents the positional relationship with the clamp 44 at the time.

After the end of step S206 in FIG. 9 or in the case of Yes in step S203 in FIG. 9, the plate material W is punched as described above (step S207 in FIG. 9).

In short, as described above, the regripping determination unit 80 acquires the regripping amount δ of the plurality of clamps 44 based on the clamp arrangement information and the width dimension K of the plate material W. Then, if the re-gripping amounts δ of the plurality of clamps 44 are not zero (“0”), the re-gripping control unit 88 immediately after the origin setting of the plate material W is performed, based on the re-gripping amounts δ of the plurality of clamps 44. , perform re-grasping motions of the plurality of clamps 44 . Accordingly, in order to reduce the overhang amount λ each time before punching various plate materials W having different widths K, the positions (arrangement states) of the plurality of clamps 44 with respect to the carriage 36 are adjusted according to the size of the plate material W. There is no need to perform setup work to consider and change. Therefore, punching can be easily performed while the overhang amount λ of the plate material W is reduced.

Therefore, according to the embodiment of the present invention, when punching various plate materials W having different widths K, the productivity of the punch press 10 is enhanced while sufficiently ensuring the processing accuracy of the plate materials W. be able to.

(Modified example of the embodiment of the present invention)
As shown in FIG. 10, in the modification of the embodiment of the present invention, the programming device 76 functions as a table storage section 90. FIG. Further, the program creation device 76 has a function as another gripping determination section 92 in place of the function as the gripping determination section 80 (see FIG. 4) including the clamp selection section 82 and the gripping amount calculation section 84. is doing. The contents of the table storage unit 90 and the grip change determination unit 92 are as follows.

As shown in FIG. 11, the table storage unit 90 stores the range of the width dimension (the dimension in the X-axis direction) K of the plate material W and the gripping amount δ It stores a regrinding amount table showing the relationship between . Further, the regripping table also includes information on a plurality of clamps 44 used during processing (during punch processing) according to the width dimension of the plate material W. FIG. When the gripping amount δ of the plurality of clamps 44 in the gripping amount table is zero "0", the plurality of clamps 44 used during machining completely match the plurality of clamps 44 used when setting the origin, and the plurality of clamps 44 regrasping is not required.

Here, the preset clamp information is, for example, as follows. The distance CLa from the right end of the carriage 36 to the center of the first clamp 44 ₁ is 100 mm, and the distance CLb from the center of the clamp 44 ₁ to the center of the second clamp 44 ₂ is 500 m. _The distance CLc from the center of the clamp 44-2 to the center of the clamp _44-3 is 1000m, and the distance CLd from the center of the clamp _44-3 to the center of the clamp _44-4 is 700mm. _The distance CLe from the center of the clamp 44-1 to the center of the clamp _44-3 is 1500m, and the distance _CLf from the center of the clamp 44-1 to the center of the clamp _44-4 is 2200mm. The width V of the gripping portion (upper clamp claw 50) of the clamp 44 is 50 mm.

It should be noted that the respective conditions and arithmetic expressions shown in the regripping amount table of FIG. 11 are examples corresponding to the aforementioned clamp information. If the size of the punch press 10 and the number and mounting positions of the clamps 44 are different, the respective conditional expressions and arithmetic expressions are determined in advance and stored in the regripping amount table.

The regripping determination unit 92 acquires the regripping amounts δ of the plurality of clamps 44 based on the input width dimension K of the plate material W while referring to the regripping amount table. In other words, the regripping determination unit 92 refers to the regripping amount table and determines, based on the input width dimension K of the plate material W, whether the width dimension of the plate material falls within any range, A determination is made as to whether or not there is a need to re-grasp the plurality of clamps 44 . Then, when the re-gripping determination unit 92 determines that re-gripping of the plurality of clamps 44 is necessary, the re-gripping amount δ of the plurality of clamps 44 is acquired by calculation.

Then, in a modified example of the embodiment of the present invention, instead of the processing of steps S101 to S113 in FIG. , the regripping amounts δ of the plurality of clamps 44 are obtained.

The modified example of the embodiment of the present invention also has the same functions and effects as the above-described embodiment of the present invention.

It should be noted that the present invention is not limited to the description of the above-described embodiments, and can be embodied in various aspects, for example, as follows.

When the regripping amount determination unit 82 determines whether or not there is a need for regripping based on the dimensions of the plate W and the clamp arrangement information, a screen of the programming device 76 or the NC device 86 is displayed to notify the operator of the result. may be displayed. The operator can also change the positions (arrangement states) of the plurality of clamps 44 based on the display.

Instead of the program creation device 76 , the NC device 86 may have the function as the grip change determination section 80 . Instead of the program creation device 76 , the NC device 86 may have the function as the table storage unit 90 and the function as the grip change determination unit 92 . Also, the technical concept applied to the punch press 10 may be applied to other plate material processing machines such as a laser processing machine (not shown).

And the scope of rights included in the present invention is not limited to the above-described embodiments.

REFERENCE SIGNS LIST 10 punch press 12 body frame 14 support frame 16 table unit 18 center fixed table 20 movable table 22 side fixed table 24 locate pin 24f abutment surface 26 plate material positioning unit 28 carriage base 30 Y-axis motor (XY-axis moving means)
32 Y-axis ball screw 34 Nut member 36 Carriage 38 X-axis motor 40 X-axis ball screw 42 Nut member 44 Clamp 44 ₁ clamp 44 ₂ clamp 44 ₃ clamp 44 ₄ clamp 48 Lower clamp claw 50 Upper clamp claw 54 Abutment member 54f Abutment surface 56 plate material holding unit 58 holding cylinder 60 operating rod 62 holding pad 64 support pad 66 punch die 68 upper turret 70 die die 72 lower turret 74 striker 76 programming device 78 input section 80 re-grip determination section 82 clamp selection section 84 grip Re-gripping calculation unit 86 NC device 88 Re-gripping control unit 90 Table storage unit 92 Re-gripping determination unit PP Processing position PL Pass line W Plate material (sheet metal)

Claims (6)

a carriage movable in the X-axis direction and the Y-axis direction with respect to the machining position;
XY-axis moving means for moving the carriage in the X-axis direction and the Y-axis direction;
a plurality of clamps of at least three or more provided on the carriage for gripping the edge of the plate;
Re-gripping determination for determining whether re-gripping of the plurality of clamps is necessary after setting the origin of the plate based on clamp placement information indicating the placement of the plurality of clamps with respect to the carriage and the width dimension of the plate. and e,
The re-gripping determination unit is
a clamp selection unit that selects a plurality of the clamps to be used during processing based on the clamp arrangement information and the width dimension of the plate;
Except for the case where the plurality of clamps used during processing and the plurality of clamps used when setting the origin completely match, the gripping amount of the plurality of clamps is adjusted based on the clamp arrangement information and the width dimension of the plate material. and a regrind amount calculation unit that calculates A plate material processing machine characterized by: 2. The regripping determination unit acquires regripping amounts of the plurality of clamps when it is determined that regripping of the plurality of clamps is necessary after setting the origin of the plate material. The plate material processing machine described. a table storage unit for storing a re-gripping amount table showing the relationship between the width dimension of the plate material and the re-gripping amount of the plurality of clamps under the condition that the clamp arrangement information is set in advance;
The regripping determination unit acquires the plurality of clamps to be used during processing and the regripping amounts of the plurality of clamps based on the width dimension of the plate material while referring to the regripping amount table of the plurality of clamps. The plate material processing machine according to claim 2, characterized in that: plate material holding means for holding the plate immovable in the X-axis direction and the Y-axis direction;
When it is determined that regripping of the plurality of clamps is necessary after setting the origin of the plate material, the regripping amount of the plurality of clamps after the plate material is held so as not to move in the X-axis direction and the Y-axis direction. and a re-grasping control unit for controlling the XY-axis movement means so as to perform re-grasping operations of the plurality of clamps based on The plate material processing machine according to claim 2, characterized in that: A plurality of clamps to be used during processing are selected based on clamp arrangement information indicating the arrangement state of the plurality of clamps with respect to the carriage in the plate processing machine and the width dimension of the plate, and the plurality of clamps to be used during processing and the origin. Except when the plurality of clamps used at the time of setting completely match, based on the clamp arrangement information and the width dimension of the plate, by calculating the regripping amount of the plurality of clamps, after setting the origin of the plate, 2. A plate material processing method for processing the plate material after determining whether or not it is necessary to re-clamp the plurality of clamps. re-grasping of a plurality of clamps is performed based on the obtained amounts of re-grasping of the plurality of clamps when it is determined that re-grasping of the plurality of clamps is necessary after setting the origin of the plate material. Item 6. The plate material processing method according to item 5.

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