Press system

Abstract

Press system that includes: a press section (10) which includes a ram (20) to which an upper tool (22A) can be attached, the ram (20) moving upwards and downwards, and includes a base plate (5) to which a lower tool (22B) can be attached, wherein the press section (10) is arranged to be operated by upward and downward movement of the plunger (20) in relation to the base plate (5) performs a pressing operation on a workpiece (W); a transport section (200) which is set up to transport the workpiece (W); an actuation section (6, 70) which is actuated to input a plunger position parameter relating to a position of the plunger (20) in a vertical direction, and a transport parameter relating to a work operation of the transport section (200), wherein the ram position parameter includes a height (P1) that allows feed and at which the workpiece (W) can be transported without overlapping with the upper tool (22A), a contact position (P2) at which the upper tool (22A) comes into contact with the workpiece (W), and a machining end position (P3) at which machining ends, and wherein the transport parameter includes a feed distance that represents the length of a transport of the workpiece (W) by means of the transport section (200) in one direction of the transport of the workpiece (W) after the end of the pressing operation of the workpiece (W) and before the start of the next pressing operation; and a control device (40), wherein the control device (40) is configured to automatically generate a pressing motion based on at least the height (P1) that allows the feed, the contact position (P2) and the machining end position (P3), automatically generates a feeder motion based on at least the height (P1) that allows the feed and the feed distance, and automatically generates a compound motion by combining the pressing motion and the feeder motion, and wherein the actuation section (6, 70) is actuated to input a material property and a thickness of the workpiece (W), and the control device (40) is set up to set a contact speed, which represents a speed of the ram (20) when the upper tool (22A) comes into contact with the workpiece (W), based on the material properties and the thickness of the workpiece (W), and to automatically generate the pressing movement based on at least the permissible height (P1) that allows feed, the contact position (P2), the machining end position (P3) and the contact speed.

Description

TECHNICAL AREA

[0001] The present invention relates to a press system. TECHNICAL BACKGROUND

[0002] For example, JP 2013 - 184 222 A discloses a method for adjusting a rotary motion when rotating a crankshaft with a servo motor in a conventional press.

[0003] JP 2017 - 013 093 A discloses a press system comprising a press unit, a transport unit, a storage unit for linking control data between ram and transport movements, and a control unit that manages both movements to optimize synchronization and reduce delays. It also includes a data generation unit for creating control data based on tool and operating parameters and allows parameter settings to be adjusted both manually and remotely.

[0004] JP 2016 - 123 990 A describes a press equipped with a ram driven by a servo motor, a sensing unit for determining the ram position, and a speed control unit that adjusts the ram speed based on predefined motion information. A stop detection unit defines deceleration and stop points so that the ram can be forcibly stopped upon detection of an abnormal signal from the workpiece conveying system.

[0005] DE 10 2008 053 ​​591 A discloses a control method for synchronizing the main motor and the feed motor in a stamping press to optimize productivity and reduce mechanical stress. The method dynamically adjusts the motor speeds based on static parameters such as stroke endpoints and feed intervals, thus enabling continuous movement of the ram even with long feed strokes. SUMMARY OF THE INVENTIONAL PROBLEM

[0006] A key feature of a servo press is its ability to perform various ram movements. While ram movement can be adjusted more flexibly, setting the motion proves to be complex, requiring a significant number of man-hours to achieve the desired movement. Similarly, a material feeder coordinated with a press also requires a substantial number of man-hours to generate optimal movement for increased productivity.

[0007] One object of the present invention is to create a press system with which the number of working hours required to generate a movement can be reduced. SOLUTION TO THE PROBLEM

[0008] A press system according to the present invention comprises a press section, a transport section, and an actuating section. The press section includes a ram to which an upper tool can be attached, the ram moving up and down, and a base plate to which a lower tool can be attached. The press section is configured to perform a pressing operation on a workpiece by moving the ram up and down relative to the base plate. The transport section is configured to transport the workpiece. The actuating section is actuated to input a ram position parameter relating to the position of the ram in a vertical direction, and a transport parameter relating to a working operation of the transport section.The ram position parameter includes a height that allows feed and at which the workpiece can be transported without overlapping the upper tool, a contact position at which the upper tool comes into contact with the workpiece, and a machining end position at which machining ends. The transport parameter includes a feed distance, which represents the length of the workpiece's movement by the transport section in one direction after the completion of the pressing operation and before the start of the next pressing operation. The press system also includes a control unit.The control device is set up to automatically generate a pressing motion based on at least the height that allows the feed, the contact position and the machining end position, automatically generate a feeder motion based on at least the height that allows the feed and the feed distance, and automatically generate a composite motion by combining the pressing motion and the feeder motion.The actuation section is used to input a material property and a thickness of the workpiece, and the control device is set up to set a contact speed, which represents a speed of the ram when the upper tool comes into contact with the workpiece, based on the material property and the thickness of the workpiece, and to automatically generate the pressing movement based on at least the permissible height that allows the feed, the contact position, the machining end position and the contact speed. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0009] With the press system of the present invention, the number of working hours required to generate a movement can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a diagram illustrating the structure of a press system based on one embodiment. Fig. Figure 2 is a perspective view of a press device based on the embodiment. Fig. Figure 3 is a cross-sectional view showing a main section of the press device. Fig. Figure 4 is a top view of a partial cross-section showing another main section of the press device. Fig. Figure 5 is a diagram that shows an overview of a drive system of the press system based on the embodiment. Fig. Figure 6 is a functional block diagram of a CPU based on the embodiment. Fig. Figure 7 is a diagram showing a first example of an input screen displayed on a display device. Fig. Figure 8 is a diagram showing an example of a table used to set a touch speed. Fig. Figure 9 is a schematic representation showing the arrangement of a tool and a workpiece when a ram is at a height that allows feed. Fig. Figure 10 is a schematic representation showing the arrangement of the tool and the workpiece when the plunger is in a contact position. Fig. Figure 11 is a schematic representation showing the arrangement of the tool and the workpiece when the plunger is in a working end position. Fig. Figure 12 is a diagram showing a second example of the input screen shown on the display device. Fig. Figure 13 is a diagram showing a third example of the input screen shown on the display device. Fig. Figure 14 is a scheme that represents a rotation angle of a main shaft corresponding to each position representing a tappet position parameter. Fig. Figure 15 is a flowchart illustrating the generation of movement in the press system based on the embodiment. Fig. Figure 16 is a scheme showing a press movement and a feeder movement generated by the press system based on the embodiment. Fig. Figure 17 is a diagram showing an example output screen displayed on the display device. Fig. Figure 18 is a diagram showing a fourth example of the input screen shown on the display device. DESCRIPTION OF EXECUTION FORMS

[0010] The present invention is described in detail with reference to the drawings. The same or corresponding elements in the drawings are assigned the same reference numerals, and their descriptions are not repeated.

[0011] The present example concerns a press device and describes, as an example, a feed press. Overall structure

[0012] Fig. Figure 1 is a diagram illustrating the structure of a press system based on one embodiment. The press system includes, as shown in Fig. Figure 1 shows a winding reel 100, a feeder 200 with leveling function (a transport section), a press device (a press section) 10 and a conveyor 120.

[0013] A rolled material (a strip of sheet metal) is wound around the unwind reel 100. In the present embodiment, the press machining of the rolled material is described as a single workpiece (material). The rolled material unwound from the unwind reel 100 is transported via feeder 200 with a straightening function to the press device 10.

[0014] Feeder 200 with alignment function adjusts the position of the feed height of the roll material transported from unwind reel 100 to press device 10 and transports the roll material under one operating condition (one feeder movement) in a set transport direction to press device 10.

[0015] Pressing device 10 performs press processing of the roll material transported by feeder 200 with straightening function.

[0016] Conveyor 120 transports the workpiece formed by pressing with press device 10. Conveyor 120 can, for example, transport the formed workpiece to the next press device.

[0017] The components in the press system are synchronized, and a series of operations are performed sequentially. The coiled material is transported from the unwinder 100 via the feeder 200 with straightening function to the press unit 10. The press unit 10 then performs the pressing operation, and the machined workpiece is transported by the conveyor 120. The sequence of processes described above is repeated.

[0018] The press system design shown above is merely an example and no specific restriction is intended.

[0019] Feeder 200 with straightening function is operated according to an instruction from press device 10. For this purpose, press device 10 has a control unit that is configured to control Feeder 200 with straightening function.

[0020] Although the present example describes a design in which the control device configured to control Feeder 200 with directional function is located in the press device 10, no restriction thereon is intended, and, for example, a control device configured to control Press Device 10 may be located on one side of Feeder 200 with directional function. A control device configured to control both Press Device 10 and Feeder 200 with directional function may be located in a position different from that of Press Device 10 and Feeder 200 with directional function in order to remotely control Press Device 10 and Feeder 200 with directional function. The embodiment describes an example in which a single control device controls both Feeder 200 with directional function and Press Device 10. Press device

[0021] Fig. Figure 2 is a perspective view of press device 10 based on the embodiment.

[0022] Fig. Figure 2 shows, as an example, a feed press device without a punch.

[0023] Press device 10 includes a main frame 2, a ram 20, a bed 4, a base plate 5, a control panel 6 and a control device 40.

[0024] The ram 20 is mounted in a substantially central section of the main frame 2 of the press device 10 such that it can move vertically. The base plate 5, attached to the bed 4, is located below the ram 20. The control unit 40 is located laterally on the main frame 2. The operating panel 6, which is connected to the control unit 40, is located laterally on the main frame 2 and in front of the control unit 40.

[0025] A die upper tool for machining a workpiece is detachably attached to the underside of ram 20. A die lower tool for machining a workpiece is detachably attached to the top of base plate 5. A predefined workpiece corresponding to the die is placed on the lower tool, the upper tool is lowered together with ram 20, and the workpiece, which is enclosed between the upper and lower tools, is subjected to press machining.

[0026] A remote control unit 70 is provided, which serves to communicate with a main body of the press device 10 and allows external remote control. An operator can perform various adjustments by operating the remote control unit 70. The remote control unit 70 can communicate with the control unit 40 to operate the press device 10 according to its instructions.

[0027] The present example shows that remote control device 70 is equipped with an up button 72 and a down button 74 for vertical actuation of plunger 20 and an enter button 76.

[0028] Control panel 6 is used to enter various types of data required for controlling press device 10 and includes a switch and a numeric keypad for entering data and a display device 61 which is set up to display a settings screen and data output by press device 10.

[0029] Such a programmable display device, in which, for example, a transparent touch control panel is attached to a front side of a graphic display device, such as a liquid crystal display or a plasma display, is used as a display device 61.

[0030] Control panel 6 may include a data input device that inputs data from an external storage medium, such as a chip card (integrated circuit) on which predefined data is stored, or a communication device that sends and receives data wirelessly or via a communication line.

[0031] Although the present example describes a design in which both control panel 6 and remote control device 70 are present for press device 10, the design of press device 10 is merely an example, and no restriction is intended. For example, press device 10 can have either control panel 6 or remote control 70.

[0032] Fig. Figure 3 is a cross-sectional view showing a main section of press device 10. Press device 10 is, as shown in Fig. 3 shown, designed as a servo press.

[0033] Press device 10 includes a servo motor 121, a spherical hole 33A, a threaded spindle 37, a spherical section 37A, a threaded section 37B, and a connecting rod body 38. Press device 10 further includes an internal threaded section 38A, a connecting rod 39, a main shaft 110, an eccentric section 110A, a side frame 111, bearing sections 112 to 114, a main gear 115, a power transmission shaft 116, a transmission gear 116A, bearing sections 117 and 118, and a pulley 119.

[0034] In press device 10, servomotor 121 drives ram 20. The spherical section 37A, located at the lower end of threaded spindle 37 for adjusting the tool height, is rotatably inserted into the spherical hole 33A in an upper section of ram 20 in such a way that it cannot come loose. The spherical hole 33A and the spherical section 37A form a ball joint. Threaded section 37B of threaded spindle 37 extends upwards above ram 20 and is screwed into the internal threaded section 38A of connecting rod body 38, which is located above threaded spindle 37. Threaded spindle 37 and connecting rod body 38 form an extendable connecting rod 39.

[0035] The height of the tool refers to a distance from the underside of plunger 20 at the time when plunger 20 is at bottom dead center, to the top of base plate 5.

[0036] An upper section of connecting rod 39 is rotatably coupled to eccentric section 110A, similar to a crank present in the main shaft 110. The main shaft 110 is movably mounted via bearing sections 112, 113, and 114, which are located at three front and rear positions between a pair of left and right thick side frames 111 that form the main frame 2. The main gear 115 is attached to a rear section of the main shaft 110.

[0037] Main gear 115 engages with transmission gear 116A of power transmission shaft 116, which is located below it. Power transmission shaft 116 is movably mounted via bearing sections 117 and 118, which are located at two positions between the side frames 111, one at the front and one at the rear. A rear end of power transmission shaft 116 is attached to the driven pulley 119. Pulley 119 is driven by the servo motor 121 located below it.

[0038] Press device 10 further includes a carrier 122, an output shaft 121A, a pulley 123, a belt 124, a support 125, a position detector 126, a rod 127, a position sensor 128, an auxiliary frame 129 and bolts 131 and 132.

[0039] Servomotor 121 is supported between the side frames 111 by the substantially L-shaped support 122, which is arranged between them. Servomotor 121 has an output shaft 121A that projects longitudinally from the press device 10, and drive force is transmitted by a belt 124, which is wound around the driving pulley 123, located on output shaft 121A, and the driven pulley 119.

[0040] Paired supports 125, projecting rearward between the side frames 111 from two upper and lower positions, are attached to the rear of plunger 20. Rod 127, forming a position detector 126, such as a linear scale, is positioned between the upper and lower supports 125. Rod 127 is equipped with a scale for detecting the vertical position of plunger 20 and is vertically movable within position sensor 128, which also forms position sensor 126. Position sensor 128 is attached to an auxiliary frame 129, which is located within a side frame 111.

[0041] Auxiliary frame 129 is elongated in the vertical direction. The auxiliary frame has a lower section that is attached to side frames 111 by bolts 131, and an upper section that is vertically displaceable via bolts 132 inserted into a vertical slot. Thus, only one side of auxiliary frame 129 is attached to side frames 111 (top and bottom, in this embodiment, one bottom), while the other side is vertically displaceable. Therefore, the auxiliary frame is not affected by shrinkage and expansion caused by temperature fluctuations in side frames 111. Position sensor 128 can thus accurately detect the position of the ram and the height of the tool without being affected by such shrinkage and expansion of side frames 111.

[0042] A position of the plunger 20 and a height of the tool are set by means of a mechanism 133 for adjusting a plunger position ( Fig. ) set, which is located in pestle 20. Fig. Figure 4 is a top view of a partial cross-section showing another main section of press device 10.

[0043] Mechanism 133 for setting a plunger position consists, as in Fig. 4 shown, consisting of a worm gear 134, which is attached to an outer circumference of the spherical section 37A with a pin 37C arranged between them, a worm 135 which engages with the worm gear 134, a drive gear 136 which is attached to one end of the worm 135, and an induction motor 138 which drives an output gear 137 ( Fig. 3) includes, which is engaged with drive gear 136. Induction motor 138 has a flat shape, a shorter axial length, and a compact design. Threaded spindle 37 can be rotated by a rotary movement of induction motor 138 with the worm gear 134 arranged between them. The length over which threaded section 37B of threaded spindle 37 and internal threaded section 38A of connecting rod main body 38 are screwed together is therefore adjusted to set the plunger position of plunger 20 and the height of the tool. Configuration of the press system drive system

[0044] Fig. Figure 5 is a diagram that shows an overview of a drive system of the press system based on the embodiment.

[0045] Feeder 200 with directional function includes, as shown in Fig. 5 shown, a transport roller 63, a servo motor 62, an encoder 64 and a servo amplifier 60.

[0046] Press device 10 includes control unit 40, a servo amplifier 66, servo motor 121, an encoder 65, main gear 115, main shaft 110, eccentric section 110A, ram 20, an upper tool 22A, a lower tool 22B and base plate 5.

[0047] Control unit 40 includes a central processing unit (CPU) 42, a memory 44, a communication circuit 46 and an input unit 48.

[0048] Communication circuit 46 is available to enable communication with remote control device 70.

[0049] CPU 42 outputs a setpoint to servo amplifier 60. Servo amplifier 60 issues a speed command to servo motor 62 based on the setpoint. Transport roller 63 performs a process to transport a workpiece W when servo motor 62 is driven.

[0050] Encoder 64 outputs a feedback signal to servo amplifier 60, which is based on the speed of servo motor 62 according to the speed command.

[0051] Servo amplifier 60 sets the speed of servo motor 62 to a value corresponding to the setpoint by controlling the supply of current to servo motor 62 based on the feedback signal from encoder 64.

[0052] The CPU 42 controls the speed of transport during the process of transporting workpiece W.

[0053] Similarly, CPU 42 outputs a setpoint to servo amplifier 66. Servo amplifier 66 issues a speed command to servo motor 121 based on the setpoint. Main gear 115 drives main shaft 110 when servo motor 121 is driven. When main shaft 110 is driven, eccentric section 110A rotates. Eccentric section 110A is coupled to ram 20, and ram 20, to which upper tool 22A is attached, moves up and down in accordance with the rotation of eccentric section 110A. When ram 20 is lowered to a bottom dead center position in the set vertical direction during an operating state (pressing motion), press machining is performed on the workpiece W, which is transported to a position between upper tool 22A and lower tool 22B.

[0054] Upper tool 22A is a movable tool attached to ram 20 and moves vertically back and forth integrally with the ram 20 as it moves up and down. Lower tool 22B is a fixed tool attached to base plate 5, positioned on and secured to it. As ram 20 moves up and down relative to base plate 5, workpiece W is clamped between upper tool 22A and lower tool 22B and subjected to press machining.

[0055] Encoder 65 outputs a feedback signal to servo amplifier 66, which is based on the rotational speed of servo motor 121 according to a speed command.

[0056] Servo amplifier 66 sets the speed of servo motor 121 to a value corresponding to the setpoint by controlling the supply of current to servo motor 121 based on the feedback signal from encoder 65.

[0057] The CPU 42 controls the speed of the plunger 20 during the upward and downward movement.

[0058] The CPU 42 based on the embodiment performs processing to synchronize a transport process using feeder 200 with directional function (which for simplicity is also referred to simply as feeder) with the upward and downward movement of ram 20 of press device 10 on the basis of control data stored in memory 44.

[0059] This means that memory 44 stores control data in which the upward and downward movement of plunger 20 is linked to a process for transporting the workpiece through feeder 200 with straightening function.

[0060] Input unit 48 accepts input of various parameters. In the present example, input unit 48 accepts parameter input via control panel 6 or remote control device 70. An operator enters various parameters by pressing a switch and a numeric keypad on a control panel 6 or any key on the remote control device 70. In this embodiment, the control panel 6 and the remote control device 70 form the operating section.

[0061] A parameter received via input unit 48 includes a plunger position parameter relating to the position of plunger 20 in the vertical direction. A parameter received via input unit 48 includes a transport parameter relating to actuation by feeder 200 with directional function. Generation of motion

[0062] The following describes a method for generating motion based on the embodiment.

[0063] Fig. Figure 6 is a functional block diagram of CPU 42 based on the embodiment.

[0064] CPU 42 contains, in Fig. Figure 6 shows a device 51 for generating contact velocity, a device 53 for generating a pressing motion, a device 55 for generating feeder motion, a device 56 for combining movements, and an execution unit 58.

[0065] Each element in the functional block diagram is implemented in coordination with each component (e.g. communication circuit 46) by executing a predefined application program stored in memory 44 using CPU 42.

[0066] Device 51 for generating contact velocity sets a velocity (contact velocity) of plunger 20 at the time when plunger 20 is lowered and upper tool 22A comes into contact with workpiece W, based on a material property and a thickness of workpiece W, which are entered via input unit 48.

[0067] Fig. Figure 7 is a diagram showing a first example of an input screen displayed on a display device 61. An operator enters a material property and a thickness of workpiece W on the display shown in Fig. The operator enters the input screen shown in section 7 by operating control panel 6 or remote control device 70. The operator selects on the screen shown in Fig. The input screen shown in 7 selects a production mode by operating control panel 6 or remote control device 70.

[0068] The production mode includes a "low-noise" mode, in which noise suppression is the highest priority; a "low-vibration" mode, in which a touch speed is set to suppress vibration, although the noise level is higher than in "low-noise" mode; and a "high-productivity" mode, in which productivity is the highest priority. The operator can also individually modify each touch speed ("User Setting A" and "User Setting B").

[0069] Fig. Figure 8 is a diagram showing an example of a table used to set a touch speed. Fig. Figure 8 shows a contact speed on workpiece W with a specific material property, which is determined according to the respective thickness and production mode. For example, for workpiece W with a thickness of 1 mm, the contact speed is set to 32 mm / s in an example where the "Low Vibration" mode is selected, and to 22 mm / s in an example where the "Low Noise" mode is selected. For workpiece W with a thickness of 3.2 mm, the contact speed is set to 35 mm / s in an example where the "Low Vibration" mode is selected, and to 25 mm / s in an example where the "Low Noise" mode is selected.

[0070] At the in Fig. In the example shown in Figure 8, "User Setting A" is configured to set a touch speed of 10 mm / s, regardless of thickness, and "User Setting B" is configured to set a touch speed of 20 mm / s, regardless of thickness. The settings shown in Fig. The columns shown in 8, “User Setting A” and “User Setting B”, can be modified as desired by an operator, while the ones in Fig. The columns shown in the 8 columns, “Low Vibration” and “Low Noise”, cannot be modified by the operator.

[0071] When "High Productive" mode is selected, although in Fig. 8 not shown, the setting is made so that a maximum touch speed of a plunger speed of 20 is set.

[0072] One in Fig. The table of touch velocities shown in Figure 8 is stored in memory 44 ( Fig. 5) stored by control unit 40. The in Fig. The table of contact velocities shown in Figure 8 is stored in memory 44 for each material property of workpiece W. Tables of contact velocities that differ for respective machining processes such as punching, bending, and drawing of workpieces W with identical material properties are stored in memory 44. Memory 44 stores a database that shows the correspondence between a material property, a thickness, and a machining process for workpiece W and a corresponding contact velocity.

[0073] Device 51 for generating contact velocities retrieves from memory 44 a corresponding table of contact velocities based on a material property and a method for machining workpiece W, which is located at the Fig. The input screen shown in section 7 is entered. Device 51 for generating touch velocity further reads a touch velocity value corresponding to the thickness and production mode of workpiece W, which is entered on the input screen in Fig. 7 must be entered from the displayed table of touch speeds. This is how a touch speed is set.

[0074] Device 53 for generating a pressing motion automatically generates a pressing motion based on a ram position parameter entered via input unit 48. The ram position parameter includes a height that allows feed, a contact position, and a working end position.

[0075] Device 55 for generating feeder movement automatically generates a feeder movement based on a transport parameter entered via input unit 48. The transport parameter includes a feed length.

[0076] Device 56 for combining movements automatically generates a compound movement by automatically combining the pressing movement generated by Device 53 for generating a pressing movement and a feeder movement generated by Device 55 for generating feeder movement.

[0077] The height that allows feed refers to a lower limit of a position of ram 20 at which there is no overlap of upper tool 22A and the transported workpiece W. Fig. Figure 9 is a schematic representation showing the arrangement of the tool and the workpiece W when a ram 20 is at the height that allows the feed. If the ram 20 is a distance from the base plate 5 that is greater than the height that allows the feed, the workpiece W can be transported without overlapping with the upper tool 22A.

[0078] The contact position refers to the position of plunger 20 at the time when upper tool 22A comes into contact with workpiece W. Fig. Figure 10 is a schematic representation showing the arrangement of the tool and the workpiece W when the ram 20 is in the contact position. When the ram 20, which is lowered towards the base plate 5, reaches the contact position, the upper tool 22A comes into contact with the workpiece W, which is placed on the lower tool 22B.

[0079] The machining end position refers to the position of ram 20 at the time of the end of press machining of workpiece W. Fig. Figure 11 is a schematic representation showing the arrangement of the tool and the workpiece W when the ram 20 is in the machining end position. When the ram 20, lowered towards the base plate 5, reaches the machining end position, the press machining of workpiece W ends.

[0080] The feed distance refers to the distance traveled by transporting workpiece W using feeder 200 with alignment function in the transport direction of workpiece W after completion of press machining of workpiece W and before the start of the next press machining operation. The speed at which workpiece W is transported by feeder 200 with alignment function is referred to as the feed rate. The feed rate is stored in memory 44. Alternatively, the feed rate can be included in a transport parameter entered via input unit 48.

[0081] Execution unit 58 controls a transport process through feeder 200 with aligning function and pressing operation using press device 10, based on a movement assembled by device 56. That is, execution unit 58 outputs a setpoint for driving the servomotors 62 and 121 to the servo amplifiers 60 and 66 based on the assembled movement and performs synchronization processing to synchronize the pressing movement and the feeder movement.

[0082] Fig. Figure 12 is a diagram showing a second example of the input screen shown at display device 61. The operator enters a height that allows feed, a touch position, and a machining end position on the device shown in Fig. The input screen shown in Figure 12 is accessed by operating control panel 6 or remote control device 70. When device 53 generates a pressing motion, an operating mode is set to maximize production quantity per unit of time. Furthermore, a production speed (unit: shot per minute (SPM)) is set. The set operating mode and production speed are displayed on the input screen in Figure 12. Fig. 12 shown.

[0083] The operating mode includes a rotary movement, a reversing movement, and a pendulum movement.

[0084] The rotary movement refers to an operating mode in which eccentric section 110A ( Fig. 3) is rotated in one direction to move plunger 20 in one cycle.

[0085] The reversing movement refers to an operating mode in which plunger 20 is moved in reverse between a downward stroke and an upward stroke between two rotation angles corresponding to a predetermined lower limit position and an upper limit position defined between rotation angles of eccentric section 110A corresponding to the top dead center and the bottom dead center of plunger 20.

[0086] The pendulum motion refers to an operating mode in which plunger 20 is moved back and forth over the bottom dead center by defining two rotation angles as two upper limit positions, which are separated by a prescribed angle in one direction of forward rotation and one direction of backward rotation from a rotation angle of the bottom dead center of eccentric section 110A, which corresponds to the bottom dead center of plunger 20, and the plunger is moved rotating in one direction from one upper limit position over the rotation angle of the bottom dead center to the other upper limit position.

[0087] Fig. Figure 12 illustrates setting the pendulum motion as the operating mode.

[0088] Fig. Figure 13 is a diagram showing a third example of the input screen shown at display unit 61. The operator enters a feed distance at the display unit shown in Fig. The input screen shown in Figure 13 is accessed by operating control panel 6 or remote control device 70. CPU 42 calculates a feed time based on the feed distance and feed rate. The calculated feed time is displayed on the input screen in Figure 13. Fig. 13. shown.

[0089] Fig. Figure 14 is a scheme that represents a rotation angle of main shaft 110 corresponding to each position representing a tappet position parameter. Fig. Figure 14 shows rotation angles of main shaft 110, corresponding to a top dead center TDC, a bottom dead center BDC, a height P1 allowing feed, a contact position P2, a machining end position P3, a height P4 to prevent jumps, and a height P5 allowing feed, of ram 20.

[0090] The operating mode of ram 20 is set to a pendulum motion, in which the ram is moved back and forth over the bottom dead center (BDC), with heights P1 and P5, which allow feed, defined as upper limit positions. Ram 20 begins by lowering from height P1, which allows feed, passes successively through contact position P2 and machining end position P3, reaches the bottom dead center (BDC), moves upwards from the bottom dead center (BDC), passes height P4 to prevent jumps, moves to height P1, which allows feed, and comes to a stop.

[0091] The machining end position P3 is, as in Fig. Figure 14 shows a position set higher than bottom dead center (BDC). The lowered plunger 20 passes machining end position P3 before reaching bottom dead center (BDC).

[0092] Height P4, used to prevent jumps, is set as a position higher than bottom dead center (BDC). After passing BDC, ram 20 begins its upward movement and passes height P4. To prevent workpiece W from moving back and forth between upper tool 22A and lower tool 22B when upper tool 22A is raised after pressing workpiece W is complete, the speed of ram 20 is set low as it moves from the machining end position P3 to height P4.

[0093] For each condition regarding a material property, a thickness, and a machining process for workpiece W, a different position of height P4 can be set to prevent jumps. The set height P4 for preventing jumps is stored in memory 44 ( Fig. 5) If height P4, which corresponds to the workpiece W to be subjected to press machining, is not stored in memory 44 when there is a change in material properties, thickness or the method for machining workpiece W, height P4 is set to prevent jumps by performing several trials before the start of machining.

[0094] Fig. Figure 15 is a flowchart illustrating the generation of movement in the press system based on the embodiment.

[0095] First, as in Fig. As shown in step S1, various parameters are entered into input unit 48. That is, an operator inputs parameters required to generate a movement to the device shown in Fig. 7, Fig. 12 and Fig. 13 input screens shown.

[0096] Subsequently, in step S2, a touch speed is set. That is, device 51 for generating touch speed sets a touch speed by applying pressure to the surface in Fig. Table 8 shows contact velocities based on a material property and a workpiece thickness W, which refers to the one shown in Fig. The input shown on screen 7 must be entered.

[0097] Subsequently, in step S3, a feeder movement is generated. That is, device 55 for generating feeder movement creates a feeder movement based on a feed distance and a feed rate that is specified in the Fig. The input shown on screen 13 must be entered.

[0098] Fig. Figure 16 is a diagram showing a press movement and a feeder movement generated by the press system based on the embodiment. The abscissa in the diagram in Fig. 16 (A) represents time, and the ordinate represents an angular velocity ω of main shaft 110 based on rotary drive by servomotor 121. An angular velocity ω max represents a value set as a maximum value for the angular velocity of main shaft 110. An angular velocity ω1 represents an angular velocity of main shaft 110 corresponding to a touch velocity set in step S2. When main shaft 110 rotates at angular velocity ω1, a lowering velocity of plunger 20 is set to a touch velocity. Fig. 16 (A) graphically represent height P1, which allows feed, contact position P2, machining end position P3, height P4 to prevent jumps, and height P5, which allows feed. The abscissa in the diagram in Fig. 16 (B) represents time, and the ordinate represents a transport speed v of workpiece W.

[0099] The transport speed will be, as in Fig. Figure 16 (B) shows that the workpiece W is accelerated from a stationary state (transport speed v = 0) to the set feed speed using a predetermined acceleration. Once the feed speed is reached, workpiece W continues to be transported at the set feed speed until it reaches a position where the speed can be reduced to transport speed v = 0 by decelerating with a predetermined acceleration. This reduction occurs when workpiece W travels a set distance. A predetermined acceleration value for each increase or decrease in transport speed is stored in memory 44.

[0100] Workpiece W is decelerated from the set feed rate at a predetermined acceleration. A transport speed of v = 0 is reached at the moment workpiece W travels the set transport distance. The transport of workpiece W is then complete. The feeder movement is generated as described above.

[0101] As with renewed reference to Fig. As can be seen in Figure 15, a pressing motion is generated in step S4. That is, device 53 for generating the pressing motion creates a pressing motion based on the height (P1) that allows the feed, the contact position (P2) and the machining end position (P3), which is located at the in Fig. The input screen shown in step 12 must be entered, as well as the touch speed set in step S2.

[0102] At this point, it is determined whether the generated pressing motion is a pendulum motion or a rotary motion. That is, two types of pressing motions are generated: one based on a pendulum motion and one based on a rotary motion. Then, from the pendulum motion and the rotary motion, a pressing motion with a higher production speed is selected.

[0103] Height P1, which allows feed, refers, as in Fig. As shown in Figure 16(A), the plunger 20 is brought to a position where it remains stationary, and therefore the angular velocity ω of the main shaft 110 at the feed-allowing height P1 is zero. The plunger 20 begins to descend from the feed-allowing height P1 towards the bottom dead center (BDC) and is accelerated with a predetermined acceleration until the maximum angular velocity ωmax is reached. After the maximum angular velocity max is reached, rotation of the main shaft 110 continues at the maximum angular velocity max until a position where the velocity can be reduced to the contact velocity ω1 by deceleration with a predetermined acceleration at a rotation angle corresponding to the contact position P2. Predetermined values ​​of the maximum angular velocity ωmax of the main shaft 110 and the acceleration at the time of acceleration and deceleration are stored in memory 44.

[0104] Main shaft 110 is decelerated from its maximum angular velocity ωmax and rotated at angular velocity ω1 at the moment ram 20 reaches contact position P2. Main shaft 110 then rotates at the same angular velocity ω1 until ram 20 reaches its machining end position P3. Ram 20 is thus lowered from contact position P2 to machining end position P3 at the contact velocity.

[0105] When ram 20 reaches machining end position P3, main shaft 110 (and ram 20) begins to accelerate. As ram 20 moves between machining end position P3 and height P4 to prevent jumps, it is moved at a speed slightly higher than the contact speed to prevent workpiece W from moving back and forth, and main shaft 110 is rotated at a speed slightly higher than the angular velocity ω1.

[0106] When plunger 20 reaches height P4 to prevent jumps, plunger 20 is accelerated again with a predetermined acceleration until maximum angular velocity ωmax is reached. After maximum angular velocity ωmax is reached, rotation of main shaft 110 continues at maximum angular velocity ωmax until a position is reached where the velocity, at a rotation angle corresponding to height P5, allows for a feed rate and can be reduced to zero angular velocity by deceleration with a predetermined acceleration.

[0107] Main shaft 110 is decelerated from its maximum angular velocity ωmax and stops rotating at the moment ram 20 reaches the height P5 that allows feed. Ram 20 comes to a stop at a position at height P5 that allows feed. The pressing motion is generated as described above.

[0108] Subsequently, in step S5, a composite motion is generated. That is, device 56 for combining motions generates a composite motion by combining the feeder motion generated in step S3 and the pressing motion generated in step S4.

[0109] After the plunger 20 has come to a stop at height P5, which allows for advance, as described in Fig. Figure 16 shows the commencement of workpiece W transport. After workpiece W has been transported a certain distance and the feed has been completed, i.e., after a period of feeder movement, the lowering of ram 20 begins. This generates the combined movement in which there is no superposition between workpiece W and upper tool 22A.

[0110] At this point, it is determined whether the pressing motion contained in the combined motion is the pendulum motion or the rotary motion. When generating the pressing motion in step S3, the pendulum motion, and the rotary motion, a pressing motion is selected, as described above, that itself results in a higher production speed. A motion different from the one selected in step S3 is reselected in step S5 if the production speed can be further increased by combining the newly selected motion.

[0111] Then, in step S6, workpiece W is machined according to the generated compound motion. Execution unit 58 performs press machining of workpiece W based on the generated compound motion.

[0112] Then, in step S7, it is determined whether the machining result of workpiece W, based on the compound motion generated in step S5, is satisfactory. For example, the torque required to rotate main shaft 110 is calculated based on a current value from servomotor 121, and if the torque exceeds a permissible value, the machining result is deemed unsatisfactory. Alternatively, the vibration generated during machining is determined, and if the vibration exceeds a permissible value, the machining result is deemed unsatisfactory. The permissible value for torque or vibration is stored in memory 44.

[0113] If the machining result is found to be unsatisfactory (NO in step S7), the compound motion is modified in step S8. For example, a speed other than the speed used in press machining (i.e., the contact speed of ram 20 (angular velocity ω1 of main shaft 110)) is modified to be lower.

[0114] After the compound motion has been modified, the process returns to step S6, in which workpiece W is machined according to the modified compound motion. Subsequently, in step S7, it is determined whether the result of machining workpiece W based on the modified compound motion is satisfactory.

[0115] If the result of the processing is found to be satisfactory (YES in step S7), the process proceeds to step S9, in which the composite movement is stored in memory 44.

[0116] The result is displayed in step S10. Fig. Figure 17 is a diagram showing an example output screen displayed on display device 61. Input values, such as a ram position parameter and a transport parameter, as well as a set and calculated value determined by automatically generating a movement, are displayed on a screen so that an operator can easily recognize the operating status of the press system by looking at this screen on display device 61. This concludes the process (end).

[0117] Although the embodiment described above represents an example where various parameters are entered sequentially via a multitude of input screens, as found in Fig. Since screens 7 and 12 to 13 are shown, the input screens can be combined into one screen. Fig. Figure 18 is a diagram showing a fourth example of the input screen shown at display unit 61. At the one in Fig. The 18 displayed input screens allow you to specify a material property, a workpiece thickness W, and a production mode, as shown in Fig. 7 can be entered, including a height that allows feed, a contact position, and a machining end position as in Fig. 12 can be entered, and can include a height that allows feed, as well as a feed distance as in Fig. 13 can be entered. A feed rate (feed speed) can also be entered.

[0118] For an experienced operator who already knows which value should be entered via the input screen, combining the input screens into one screen can improve work efficiency, as all information can be entered via the one screen, saving time and effort by eliminating the need to switch between input screens. Function and effect

[0119] The following describes a function and an effect of the present embodiment.

[0120] In the press system based on the embodiment, as described in Fig. Figure 16 shows that a pressing motion is automatically generated by setting a ram position parameter that relates to a position in the vertical direction of the ram. A feeder motion is automatically generated by setting a transport parameter that relates to a function of the transport section. The fastest pressing motion, coordinated with a material feeding device (Feeder 200 with alignment function), can be automatically generated under conditions requiring both low vibration and low noise by combining the automatically generated pressing motion and the feeder motion. This reduces the man-hours required to set the motion.

[0121] The plunger position parameter closes, as in Fig. Figure 12 shows a height that allows feed, a contact position, and a machining end position. These positions are determined by the workpiece W to be machined and are already known to an operator operating the press system in this embodiment. A feed distance included in a transport parameter is also determined by the workpiece W to be machined and is already known to the operator. Even an unskilled person with less experience can automatically generate a press movement and a feeder movement by entering a known target value as a parameter, thus easily creating an optimal movement in which there is no overlap between the workpiece W and the tool.

[0122] The transport parameter also includes a feed rate. A feeder movement is generated based on a feed distance and a feed rate such that Feeder 200 accelerates from zero speed to a feed rate with directional action, continues moving over a distance corresponding to the feed distance, and then decelerates from the feed rate back to zero speed. The feeder movement can thus be generated automatically.

[0123] Furthermore, as in Fig. 7 and Fig. Figure 8 shows that a contact speed is set based on a material property and the thickness of the workpiece W. A pressing motion is generated by setting the speed of the ram 20 to zero at the height that allows the feed rate, and maintaining the contact speed from the contact position to the end of the machining process. In this way, the pressing motion can be generated automatically.

[0124] It can, as in Fig. As shown in Figure 15, it is possible to prevent a case in which excessive load acts on servomotor 121 by determining, based on a result of pressing workpiece W according to the generated compound motion, whether a compound motion is satisfactory.

[0125] If the determination regarding the compound motion is negative, then, as in Fig.Figure 15 shows that the compound motion is modified so that the load acting on the servomotor 121 can be satisfactory and the press system can be operated in a satisfactory condition, while also suppressing vibration.

[0126] If the generated compound motion is stored and saved in memory 44, the compound motion can be read from memory 44 and used if press machining is subsequently carried out in the same state, thereby further improving the efficiency of the work.

[0127] By determining whether the generated pressing motion is the pendulum motion or the rotary motion, a motion with a higher production speed is selected, and a suitable pressing motion can be generated.

[0128] The determination as to whether the pressing motion is the pendulum motion or the rotary motion is made both in the case of automatic generation of the pressing motion and in the case of a combination of the pressing motion and the feeder motion, so that a combined motion can be generated in which the production speed is highest.

[0129] An example has been described in which the operating mode of plunger 20 is set to either pendulum motion or rotary motion. The principle in the embodiment described above can also be applied to an example in which the operating mode is set to reverse motion, without being limited to these operating modes.

[0130] The press device is not limited to those with the design described in the embodiment, and the press device can be designed such that a punch and a punch holder are arranged between the connecting rod and the tappet. An eccentric mechanism can have a crankshaft structure or a drum structure. LIST OF REFERENCE MARKS

[0131] 2 Main frame; 4 Bed; 5 Base plate; 6 Control panel; 10 Press device; 20 Ram; 22A Upper tool; 22B Lower tool; 37 Threaded spindle; 38 Connecting rod main body; 39 Connecting rod; 40 Control unit; 42 CPU; 44 Memory; 46 Communication circuit; 48 Input unit; 51 Touch velocity generation device; 53 Press motion generation device; 55 Feeder motion generation device; 56 Motion assembly device; 58 Execution unit; 60, 66 Servo amplifier; 61 Display unit; 62, 121 Servo motor; 63 Transport roller; 64, 65 Encoder; 70 Remote control unit; 72, 74 Button; 76 Input button; 100 Unwind reel; 110 Main shaft; 110A Eccentric section; 115 Main gear; 200 Feeder with aligning function

Claims

[1] Press system comprising: a press section (10) which includes a ram (20) to which an upper tool (22A) can be attached, the ram (20) moving upwards and downwards, and includes a base plate (5) to which a lower tool (22B) can be attached, wherein the press section (10) is arranged to be operated by upward and downward movement of the plunger (20) in relation to the base plate (5) performs a pressing operation on a workpiece (W); a transport section (200) which is set up to transport the workpiece (W); an actuation section (6, 70) which is actuated to input a plunger position parameter relating to a position of the plunger (20) in a vertical direction, and a transport parameter relating to a work operation of the transport section (200), wherein the ram position parameter includes a height (P1) that allows feed and at which the workpiece (W) can be transported without overlapping with the upper tool (22A), a contact position (P2) at which the upper tool (22A) comes into contact with the workpiece (W), and a machining end position (P3) at which machining ends, and wherein the transport parameter includes a feed distance that represents the length of a transport of the workpiece (W) by means of the transport section (200) in one direction of the transport of the workpiece (W) after the end of the pressing operation of the workpiece (W) and before the start of the next pressing operation; and a control device (40), wherein the control device (40) is configured to automatically generate a pressing motion based on at least the height (P1) that allows the feed, the contact position (P2) and the machining end position (P3), automatically generates a feeder motion based on at least the height (P1) that allows the feed and the feed distance, and automatically generates a compound motion by combining the pressing motion and the feeder motion, and wherein the actuation section (6, 70) is actuated to input a material property and a thickness of the workpiece (W), and the control device (40) is set up to set a contact speed, which represents a speed of the ram (20) when the upper tool (22A) comes into contact with the workpiece (W), based on the material properties and the thickness of the workpiece (W), and to automatically generate the pressing movement based on at least the permissible height (P1) that allows feed, the contact position (P2), the machining end position (P3) and the contact speed. [2] Press system according to claim 1, wherein the control device (40) is configured to automatically generate the feeder movement based on at least the height (P1) that allows feed, the feed distance and a feed speed that represents a speed of the workpiece (W) transported through the transport section (200). [3] Press system according to claim 1 or 2, wherein the control device (40) is configured to determine, on the basis of a result of the pressing of the workpiece (W) according to the combined movement, whether the combined movement is suitable. [4] Press system according to claim 3, wherein the control device (40) is configured to modify the compound movement when it is determined that the compound movement is not suitable. [5] Press system according to one of claims 1 to 4, which further comprises a storage unit (44) configured to store and secure the combined movement. [6] Press system according to any one of claims 1 to 5, wherein the control device (40) is configured to determine, when the pressing motion is generated, whether the pressing motion is a pendulum motion or a rotary motion. [7] Press system according to claim 6, wherein the control device (40) is configured to determine, when the compound movement is generated, whether the pressing movement contained in the compound movement is the pendulum movement or the rotary movement.

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