TWI706854B - AC servo press device - Google Patents

Abstract

The invention provides an AC servo stamping device which can correspond to the bending processing of long-size workpieces, saves electricity and has high accuracy.

The present invention is provided with: reciprocating rods (41a, 41b) which are installed on both sides of the device and reciprocatingly drive a moving body (42a, 42b) by a main drive motor (40a, 40b); The force point part, the pressing plate pressing rod (70a, 70b) respectively has an action point part, the force applied to the force point part is multiplied and transmitted to the force applying mechanism (60a, 60b) of the action point part; And the crank mechanism (80a, 80b) that controls the offset phase by the auxiliary drive motor (50a, 50b), and controls the up and down movement of the press plate pressing rod (70a, 70b) according to the offset phase, and the main drive motor (40a) , 40b) Through the force applying mechanism (60a, 60b) to promote the lowering of the stamping plate (30), the workpiece, that is, the workpiece is pressed and processed, and the crank mechanism (80a, 80b) is used for high-speed control when the workpiece is not pressed Up and down movement of the stamping plate (30).

Description

AC servo press device

The present invention relates to: press forging (press forging) such as a press brake and a panel bender used to process metal plates (panels, panels) such as thin steel plates, etc. The machine, that is, the AC servo press device, in more detail, relates to an AC servo press device that can reduce the power receiving capacity and can handle the bending processing of long workpieces.

Bending sheet steel and other plates as a workpiece (processed material) into a desired shape, which is also known as the driving method of a plate bending machine. In recent years, AC servo motors have been used to replace traditional hydraulically driven motors. Drive, or switchable use of hydraulic drive and motor drive, that is, a hybrid type drive method, has become the mainstream. In this case, a structure that uses a servo motor as a driving force source is mostly to transmit the rotation of the motor output shaft to a long ball screw, and convert the rotation of the ball screw into a lifting motion in the up and down direction of the press. That is, it is converted into a lowering action when pressurized and a rising action when not pressurized.

In this servo motor drive mode, compared to the traditional The hydraulic drive of the HYDRA can significantly improve the driving accuracy and eliminate the so-called oil pollution. However, on the other hand, in the trend of saving energy and resources, the so-called "how to reduce power consumption" has become a problem.

For example, in the case of a 50-ton (490KN) pressurized plate bending machine, it is like the consensus among manufacturers of 6KVA~15KVA of power receiving capacity, which has high power consumption and high running cost. The problem.

There is a punching machine disclosed in Patent Document 1 that has been proposed in order to solve the above-mentioned problems. The punching machine disclosed in Patent Document 1 uses the rotational energy stored in a fly wheel to convert it into electrical energy, and stores (storages) the generated electrical power in a power storage system. The power-saving device is achieved by supplying the motor to the demand.

However, the punching machine disclosed in the patent document has the following problem: Considering the cost effectiveness based on the energy saving viewpoint, the installation of a power storage system will greatly increase the manufacturing cost. Not only that, but it is also difficult to deal with The problem of processing multiple sizes of workpieces.

In view of this, the applicant in this case proposes a universal press device disclosed in Patent Document 2. The general-purpose press device disclosed in Patent Document 2 is provided with an emphasizing part on a reciprocating rod driven by a drive motor, and an action point part on the pressing rod of the press plate, which will act on the pressing rod. The afterburner of the force point is multiple times and is transmitted to the point of application. The afterburner mechanism achieves power saving. Not only that, but also by setting the " Use the quick return function of the offset mechanism" to achieve a device that improves work efficiency.

However, in the general-purpose press device disclosed in Patent Document 2, the rotational force driven by a motor provided in the center of the device is transmitted to the biasing mechanism via the "crank shaft extending in the direction of both ends of the device" to execute the press. The high-speed up and down movement of the plate is controlled. Therefore, when it is applied to a press device that performs bending processing of long workpieces, a long crankshaft that "extends from the center of the device to the two ends of the device" is required. If this length is considered The vibration and deflection of the crankshaft of the size have the problem that the high-speed drive of the stamping plate cannot be executed with high accuracy.

[Advanced Technical Literature] [Patent Literature]

[Patent Document 1]: Japanese Patent Application Publication No. 2003-230998

[Patent Document 2]: JP 2014-200844 A

In view of this, the object of the present invention is to provide an AC servo stamping device that can correspond to the bending processing of long-size workpieces, and is power-saving and highly accurate.

In order to achieve the above-mentioned object, the invention of claim 1, which It is characterized by: having: a plurality of main drive motors as the main power source; and a plurality of reciprocating rods installed at least on both sides of the device, and the movable body on the shaft is reciprocally driven by the main drive motors; and The moving bodies of the aforementioned reciprocating rods respectively have force point portions, and at least the press plate pressing rods provided at both ends of the device for pressing the press plate have link plates with action points" respectively, and the link plates will be applied to the aforementioned A plurality of forcing mechanisms in which the force of the force application point is multiple times and is transmitted to the application point of the pressing plate pressing lever; and a plurality of auxiliary driving motors as auxiliary power sources; and each of the auxiliary driving motors is controlled by the auxiliary driving motors Offset phase, by means of the offset phase, the pressing rod of the punching plate is moved up and down, in the vertical movement control of the pressing rod of the punching plate by the main drive motor, a plurality of independent and high-speed control crank mechanisms are formed; The lowering control of the pressing rod of the punching plate by the driving force of the main drive motor allows the punching plate to be lowered to press and process the workpiece as the workpiece. The crank mechanism controls the non-pressing processing of the workpiece. The aforementioned punching plate moves up and down at high speed.

The invention of claim 2 is characterized in that, in the invention of claim 1, the reciprocating rod is rotatably attached to the device, and the end of the pressing plate pressing lever is rotatably connected to the punching plate .

The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, the crank mechanism is provided with a shaft that becomes a fulcrum of the connecting plate at a position eccentric from the central axis by a certain distance, and is The offset disc housed in the side plate of the device, by using the aforementioned auxiliary drive motor to control the offset phase of the offset disc, and then control the pressing plate The press rod moves up and down at high speed.

The invention of claim 4 is characterized in that, in any of the inventions of claims 1 to 3, when the punching plate is lowered, the auxiliary drive motor is executed before the start of the lowering control of the punching plate by the main drive motor. The high-speed lowering control of the punching plate by the drive motor. When the punching plate is raised, after the high-speed raising control of the punching plate by the auxiliary drive motor, the raising control of the punching plate by the main drive motor is executed.

The invention of claim 5 is characterized in that, in any one of claims 1 to 3, when the punching plate is lowered, the main drive motor performs the lowering control of the punching plate at the same time. The high-speed lowering control of the punching plate by the drive motor, when the punching plate is raised, the ascending control of the punching plate by the main drive motor is simultaneously executed during the high-speed raising control of the punching plate by the auxiliary drive motor.

The invention of claim 6 is characterized in that: in any one of the inventions of claims 1 to 5, the invention further includes: a punching plate position detection sensor for detecting the upper and lower moving positions of the punching plate; and A reciprocating rod position detection sensor used to detect the moving position of the moving body on the reciprocating rod; and a link plate deviation detection sensor used to detect the position deviation of the link plate; and An offset phase detection sensor for detecting the offset phase of the crank mechanism; and a sensor based on the punching plate position detection sensor, the reciprocating rod position detection sensor, and the link plate deviation detection sensor The detection signal is used to control the main driving motor control means of the main driving motor; and based on the aforementioned stamping plate position detection sensor, the aforementioned reciprocating rod position detection sensor, the aforementioned link plate deviation detection sensor, and the aforementioned stamping Offset phase The detection signal of the detection sensor controls the auxiliary driving motor control means of the aforementioned auxiliary driving motor.

According to the present invention, it is provided with: a plurality of main drive motors as the main power source; and a plurality of reciprocating rods which are installed at least on both sides of the device and respectively reciprocate the moving body on the shaft by the main drive motors; and "The moving body of the aforementioned reciprocating rod has points of application respectively, and at least the pressing rods of the pressing plate provided at both ends of the device for pressing the pressing plate have points of application respectively." The connecting plate will be applied to the aforementioned application A plurality of forcing mechanisms in which the force of the force point portion is multiplied and transmitted to the point of action of the press plate pressing lever; and a plurality of auxiliary drive motors as auxiliary power sources; and the aforementioned auxiliary drive motors control each deviation Shifting the phase, by means of the shifting phase, the pressing rod of the punching plate is moved up and down, and a plurality of crank mechanisms that are independent and performing high-speed control are formed in the vertical movement control of the pressing rod of the punching plate by the main drive motor; and Composition: The lowering control of the pressing rod for the pressing plate is controlled by the driving force of the main drive motor, so that the pressing plate is lowered to press the workpiece as the workpiece, and the non-pressing processing of the workpiece is controlled by the crank mechanism Among them, the aforementioned punching plate moves up and down at high speed, so the following effects can be achieved: providing an AC servo punching device that can correspond to the bending processing of long-sized workpieces, and can save power and control with high precision.

10a, 10b: side panels

11: Frame

11a, 11b: installation department

20: Base

20a: Base

30: stamping plate

30a: Socket

40a, 40b: main drive motor

41a, 41b: reciprocating rod

42a, 42b: moving body

43a, 43b: Installation part

44a, 44b: pin

50a, 50b: auxiliary drive motor

60a, 60b: Booster mechanism

61a, 61b: pin

62a, 62b: pin

63a, 63b: shaft

64a, 64b: link plate

70a, 70b: Pressing rod for stamping plate

71a, 71b: pin

80a, 80b: crank mechanism

81a, 81b: offset disk

82a, 82b: crankshaft

91a, 91b: Stamping plate position detection sensor

92a, 92b: Link plate deviation detection sensor

93a, 93b: Offset phase detection sensor

94a, 94b: Reciprocating rod position detection sensor

95: foot switch

96a, 96b: gas cylinder

100: AC servo stamping device

600: control device

601: Main Control Unit

602: Main drive motor control unit

603: auxiliary drive motor control unit

Figure 1: Figure 1 is a front view of the AC servo press device of the present invention viewed from the front.

Figure 2: Figure 2 is a side view of the AC servo press device shown in Figure 1 viewed from the side.

Figure 3: Figure 3 is a front view of the crank mechanism of the AC servo press device shown in Figure 1 from the front.

Figure 4: Figure 4 is a plan view of the crank mechanism of the AC servo press device shown in Figure 1 viewed from above.

Figure 5: Figure 5 is a diagram for explaining the details of the crank mechanism of the AC servo press device shown in Figure 1. Figure 5 (A) is an enlarged side view, and Figure 5 (B) is it Enlarge the front view.

Figure 6: Figure 6 is a block diagram for explaining the control device of the AC servo press device shown in Figure 1.

Figure 7: Figure 7 is a flowchart for explaining the overall operation of the control device of the AC servo press device shown in Figure 6.

Fig. 8: Fig. 8 is a flowchart for explaining an example of the start preparation process of the flowchart shown in Fig. 7.

Figure 9: Figure 9 is a flowchart for explaining one example of the ram lowering process in the flowchart shown in Figure 7.

Fig. 10: Fig. 10 is a flowchart for explaining one example of the workpiece processing in the flowchart shown in Fig. 7.

Figure 11: Figure 11 is a flowchart for explaining one example of the stamping origin restoration process of the flowchart shown in Figure 7.

Fig. 12: Fig. 12 is a flowchart for explaining another example of the press-down process of the flowchart shown in Fig. 7.

Figure 13: Figure 13 is a flowchart for explaining another example of the stamping origin restoration process of the flowchart shown in Figure 7.

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

Figure 1 is a front view of the AC servo press device of the present invention viewed from the front, Figure 2 is a side view of the AC servo press device shown in Figure 1 viewed from the side, and Figure 3 is a front view of Figure 1 when viewed from the front The front view of the crank mechanism of the AC servo punching device shown in Figure 4 is a top view of the crank mechanism of the AC servo punching device shown in Figure 1 from above, and Figure 5 is used to illustrate the first An enlarged side view (Figure 5 (A)) and an enlarged front view (Figure 5 (B)) of the details of the crank mechanism of the AC servo press device.

In the embodiments shown below, it is shown that the AC servo punching device of the present invention is applied to an AC servo drive bender that performs bending processing of long-sized plates.

In Figures 1 to 5, the AC servo press device 100 of this embodiment includes: side plates 10a, 10b provided on the left and right sides; and a long base 20 that is replaceably attached to the side plates 10a, 10b ; And above the base 20, slidably installed on the side plates 10a, 10b front long stamping plate 30.

Among them, on the base portion 20a located on the upper part of the base 20, a lower mold omitted in the figure is detachably mounted, and an upper mold such as a punch omitted in the drawing is mounted on the receiving portion 30a of the punching plate 30 . Then, by lowering the punching plate 30, the long plate inserted between the base 20 and the punching plate 30, which is omitted in the drawing, is bent.

In addition, the AC servo press device 100 of this embodiment is provided with the main power source that is provided on both sides of the AC servo press device 100 to control the up and down movement of the press plate 30, that is, main drive motors 40a, 40b. ; And are provided on both sides of the AC servo stamping device 100, used to high-speed control the stamping plate 30 up and down movement of the auxiliary power source, that is, the auxiliary drive motors 50a, 50b.

The main driving motors 40a and 40b respectively rotate and drive the reciprocating rods 41a and 41b, thereby reciprocating the moving bodies 42a and 42b on the reciprocating rods 41a and 41b. The reciprocating movement of the movable bodies 42a, 42b can be performed by, for example, ball screws provided on the reciprocating rods 41a, 41b.

The reciprocating rods 41a and 41b are mounted on the mounting portions 43a and 43b on the back side of the AC servo press device 100 so as to be rotatable in the arrow A direction using pins 44a and 44b.

The reciprocating movement of the movable bodies 42a, 42b on the reciprocating rods 41a, 41b is transmitted by the force applying mechanism 60a, 60b to the pressing used to press the pressing plates 30 provided on both sides of the AC servo pressing device 100 Plate pressing lever 70a, 70b. Here, the punching plate pressing rods 70a and 70b are connected to both ends of the upper part of the punching plate 30 by pins 71a and 71b so as to be rotatable in the direction of arrow B.

The urging mechanism 60a, 60b urges the "force of the reciprocating movement of the moving bodies 42a, 42b driven by the main drive motors 40a, 40b" and transmits it to the punching plate pressing levers 70a, 70b. That is, the energizing mechanism 60a, 60b is provided with connecting plates 64a, 64b, and one end of the connecting plates 64a, 64b is rotatably connected to the moving bodies 42a, 42a of the reciprocating rod 41a, 41b by pins 61a, 61b, respectively. 42b, the other end can be rotatably connected to the pressing plate pressing rods 70a, 70b by pins 62a, 62b, respectively, and the rod shafts 63a, 63b are respectively used as fulcrum parts.

Here, the energizing mechanisms 60a and 60b respectively use the pins 61a and 61b on the moving bodies 42a and 42b of the reciprocating rods 41a and 41b as energizing points, and press the pins 62a and 62a on the rods 70a and 70b respectively by pressing the punching plate. 62b is used as the point of action, and the lever shafts 63a, 63b for supporting the connecting plates 64a, 64b are operated as fulcrums. If the distances from the pins 61a, 61b on the moving bodies 42a, 42b to the lever shafts 63a, 63b are Set to "n" and set the distance from the rod shaft 63 to the pins 62a and 62b to "1", the force applied to the pins 61a and 61b will be added based on the principle of leverage generated by the connecting plates 64a and 64b The force is n-folded and transmitted to the pins 62a and 62b. In this way, the punching plate pressing rods 70a and 70b are moved up and down, thereby controlling the up and down movement of the punching plate 30.

The auxiliary drive motors 50a and 50b are driven by the crank mechanisms 80a and 80b to control the vertical movement of the punch plate 30 at high speed. Regarding the crank mechanism 80a, in Figure 5(A), the details of the crank mechanisms 80a, 80b are shown in a side view, and in Figure 5(B), the details of the crank mechanisms 80a, 80b are shown in a front view.

That is, as shown in Figure 5 (A) and (B), the crank mechanisms 80a and 80b respectively have offset discs 81a slidably received in "holes 12a and 12b formed in the side plates 10a and 10b" , 81b, the rod shafts 63a, 63b are respectively mounted at positions eccentrically (offset) a certain distance d from the central axis of the offset discs 81a, 81b. The offset discs 81a, 81b are respectively sandwiched by two connecting plates 64a, 64b, and the rod shafts 63a, 63b use fulcrums to support the connecting plates 64a, 64b so as to be rotatable. The offset discs 81a, 81b are controlled by the "rotation of the crankshafts 82a, 82b transmitted by the rotation of the auxiliary drive motors 50a, 50b".

In the above structure, once the auxiliary drive motors 50a, 50b cause the crankshafts 82a, 82b to rotate 180 degrees from the position shown in Fig. 5, the lever shafts 63a, 63b can be moved downward by a distance of 2d. Similarly, as described above, once the lever shafts 63a, 63b are controlled (moved) downward, the auxiliary drive motors 50a, 50b urge the crank shafts 82a, 82b to further rotate 180 degrees, and the levers The shafts 63a and 63b move upward by a distance of 2d.

The movement of the rod shafts 63a and 63b is transmitted to the punching plate 30 via the connecting plate 64a and the punching plate pressing rod 70a, whereby the punching plate 30 can move up and down at high speed. When the rod shaft 63a moves, the longitudinal movement of the connecting plates 64a, 64b is determined by the "rotation mechanism composed of the pins 44a, 44b of the reciprocating rods 41a, 41b" and "the pins pressing the rods 70a, 70b by the press plate The rotating mechanism composed of 71a and 71b” is absorbed.

In this way, by "driving the crank mechanisms 80a, 80b with the auxiliary drive motors 50a, 50b", the punching plate 30 can be moved up and down, Independent and high-speed control is formed in the up and down movement of the punching plate 30 generated by the force applying mechanisms 60a and 60b.

In Figures 1 to 5, the stamping plate position detection sensors 91a and 91b are composed of linear scales arranged on both sides of the stamping plate 30 to detect stamping The up and down movement positions of the punching plate 30 at both ends of the plate 30. In addition, the link plate deviation detecting sensors 92a, 92b are composed of laser sensors and used to detect the position deviation of the link plates 64a, 64b. In addition, the air cylinders 96a and 96b apply upward force to the hydraulic cylinder 30 and are members for balancing the "forces at the left and right end positions of the press plate 30".

Figure 6 is a block diagram for explaining the control device of the AC servo press device shown in Figure 1.

In Fig. 6, the control device 600 has a main control unit 601 at the center, and inputs to the main control unit 601: the stamping plate position detection sensors 91a, 91b shown in Figs. 1 to 5; Plate deviation detection sensors 92a, 92b; and the offset phase detection sensors 93a, 93b (not shown in Figures 1 to 5); reciprocating rod position detection sensors 94a, 94b; pedals The output of the switch 95 controls the main drive motors 40a and 40b through the main drive motor control unit 602, and controls the sub drive motors 50a and 50b through the sub drive motor control unit 603.

The offset phase detection sensors 93a, 93b are components used to detect the offset phase of the offset discs 81a, 81b of the crank mechanism 80a, 80b. For example, they can be installed on the crankshafts 82a, 82b. The reciprocating rod position detection sensor 94a, 94b is a component used to detect the positions of the moving bodies 42a, 42b on the reciprocating rods 41a, 41b, and can be constituted by an encoder installed on the rotating shaft of the main drive motor 40a, 40b.

In addition, the foot switch 95 is a component for the operator to input the activation signal into the AC servo press device 100. By turning the foot switch 95 ON, the AC servo press device 100 is activated. Once the foot switch 95 is set OFF, the AC servo press device 100 stops.

In addition, the main drive motor control unit 602 detects the position of the stamping plate from the main control unit 601 by detecting sensors 91a, 91b; connecting plate deviation detection sensors 92a, 92b; and reciprocating rod position detection sensors The detection signals of the drivers 94a and 94b synchronously control the main driving motors 40a and 40b. In addition, the auxiliary drive motor control unit 603 detects the sensor 91a, 91b based on the position of the stamping plate from the main control unit 601; the web deviation detection sensor 92a, 92b; the offset phase detection sensor The detection signals of the reciprocating rod position detection sensors 94a, 94b, synchronously control the auxiliary driving motors 50a, 50b.

Fig. 7 is a flowchart for explaining the overall operation of the control device of the AC servo press device shown in Fig. 6.

In Fig. 7, once the power is turned on (step 701), the main control unit 601 shown in Fig. 6 executes the activation preparation process of the AC servo press device 100 (step 702). An example of the start-up preparation process in this step 702 is shown in FIG. 8.

In Figure 8, once the start-up preparation process is started, first, the stamping plate position detection sensors 91a, 91b will be used; The detection sensors 92a, 92b; the reciprocating rod position detection sensors 94a, 94b act (step 801), and investigate whether these sensors are operating normally (step 802). Here, when the sensors and switches are not operating normally (NO in step 802), return to step 802 and wait for the sensors and switches to operate normally, if it is determined in step 802 that these sensors and switches It has been operating normally (YES in step 802). First, according to the AC servo stamping device 100, perform, for example, information about the bending of long-size plates and step selection (step 803), and then, according to the position detection of the stamping plate The detection signals of the detectors 91a and 91b are used to investigate whether the punching plate 30 is located at the top dead center (step 804). Here, when the punching plate 30 is not at the top dead center (NO in step 804), return to step 804 and wait for the punching plate 30 to become the top dead center. If it is determined in step 804 that the punching plate 30 is located at the top dead center (YES in step 804), the start preparation process is ended.

Returning to Figure 7, once the start preparation process of step 702 is completed, the cyclic action of the AC servo punching device 100 is prompted to start (step 703), and the execution of "not shown in the figure, which is executed with the AC servo punching device 100 The bending process of the long plate is related to the switching of the back gauge and the die (step 704).

Next, it is investigated whether the lowering preparation of the punching plate 30 is completed (step 705). When the lowering preparation of the punching plate 30 is not completed (NO in step 705), it returns to step 705 and waiting for the lowering preparation of the punching plate 30 to be completed. If it is determined in step 705 that the preparation for lowering of the punching plate 30 is completed (YES in step 705), the punching plate lowering process is entered (step 706). One of the lowering processing of the stamping plate in step 706 Example, shown in Figure 9.

In Figure 9, once the pressing plate lowering process starts, first, the foot switch 95 is turned ON (step 901), and the auxiliary driving motors 50a and 50b are turned ON via the auxiliary driving motor control unit 603, and then the crank mechanism 80a , 80b controls the high-speed descent of the stamping plate 30 (step 902).

Then, according to the detection signals of the offset phase detection sensors 93a, 93b, it is investigated whether the offset phase of the offset discs 81a, 81b has reached a lower limit (step 903). Here, when the offset phase of the offset discs 81a, 81b does not form a lower limit (NO in step 903), return to step 902, continue the crank mechanism 80a, 80b to control the high-speed descent of the punching plate 30, once When it is determined in step 903 that the offset phase of the offset discs 81a and 81b has reached the lower limit (YES in step 903), the sub-driving motor control unit 603 turns off the sub-driving motors 50a and 50b (step 904).

Next, the main drive motors 40a and 40b are turned ON via the main drive motor control unit 602, and the lowering control of the punching plate 30 by the booster mechanisms 60a and 60b is executed (step 905). Then, based on the detection signals of the stamping plate position detection sensors 91a, 91b, it is investigated whether the stamping plate 30 has reached the starting position of the workpiece, that is, whether the upper die mounted on the stamping plate 30 has reached the Start the processing start position of the bending processing of the long plate" (step 906). Here, once it is determined that the punching plate 30 has not reached the processing start position of the workpiece (NO in step 906), it returns to step 905, and continues to push the punching plate 30 by the force mechanism 60a, 60b. In the lowering control, when it is determined in step 906 that the punching plate 30 has reached the machining start position of the workpiece (YES in step 906), the main drive motor control unit 602 controls the main drive motors 40a and 40b to OFF (step 907) , And end the stamping plate descending process.

Once the pressing plate descending process is completed, the processing of the workpiece shown in Fig. 7 is entered (step 707). An example of the workpiece processing in step 707 is shown in FIG. 10.

In Fig. 10, once the workpiece processing is started, first, it is checked whether the foot switch 95 is turned on (step 1001). Here, once the foot switch 95 is not turned ON (NO in step 1001), return to step 1001 and wait for the determination that the foot switch 95 is turned on. Once it is determined in step 1001 that the foot switch 95 is turned on (YES in step 1001), the main drive motors 40a, 40b are turned ON via the main drive motor control unit 602, and the force mechanism 60a, 60b controls the lowering of the punch plate 30 (step 1002), and the start is not shown in the figure. The long-size board shown is the bending process of the workpiece.

Then, according to the detection signals of the stamping plate position detection sensors 91a, 91b, it is investigated whether the stamping plate 30 has reached the end position of the workpiece processing (step 1003), if it has not reached the end position of the workpiece processing (NO in step 1003), It returns to step 1002 and continues to process the workpiece.

If it is determined in step 1003 that the punching plate 30 has reached the workpiece processing end position (YES in step 1003), the main drive motors 40a, 40b are turned off (step 1004), and the workpiece processing is ended. 工处理。 Work processing.

Once the processing of the workpiece is completed, the process of restoring the stamping origin shown in Fig. 7 is entered (step 708). An example of the stamping origin restoration processing in step 708 is shown in FIG. 11.

In Fig. 11, once the press origin restoration process is started, first, it is checked whether the foot switch 95 is turned on (step 1101). Here, once the foot switch 95 is not turned ON (NO in step 1101), return to step 1101 and wait for the determination that the foot switch 95 is turned on. Once it is determined in step 1101 that the foot switch 95 is turned on (YES in step 1101), the sub-driving motors 50a and 50b are turned on via the sub-driving motor control unit 603, and the crank mechanisms 80a and 80b control the high-speed ascent of the punch plate 30 (step 1102). Then, according to the detection output of the offset phase detection sensors 93a, 93b, it is investigated whether the offset phase of the offset discs 81a, 81b has reached an upper limit (step 1103). Here, when the offset phase of the offset discs 81a, 81b does not form an upper limit (NO in step 1103), return to step 1102, continue the crank mechanism 80a, 80b to control the high-speed ascent of the punching plate 30, once When it is determined in step 1103 that the offset phase of the offset discs 81a and 81b has reached the upper limit (YES in step 1103), the sub-driving motor control unit 603 turns off the sub-driving motors 50a and 50b (step 1104).

Next, the main drive motors 40a and 40b are turned ON via the main drive motor control unit 602, and the "lifting control of the punch plate 30 using the booster mechanisms 60a and 60b" is started (step 1105).

Then, detect the sensors 91a, 91b according to the position of the stamping plate To investigate whether the position of the stamping plate 30 has reached the top dead center (step 1106). Here, once it is determined that the punching plate 30 has not reached the top dead center (NO in step 1106), the process returns to step 1105, and the lifting control of the punching plate 30 by the force mechanism 60a, 60b is continued. Once in step 1106 When it is determined that the top dead center has been reached (YES in step 1106), the main drive motor control unit 602 controls the main drive motors 40a and 40b to OFF (step 1107), and ends the pressing origin restoration process.

Once the stamping origin restoration process is completed, it is formed: in step 709 of FIG. 7, it is determined whether the operation of the AC servo stamping device 100 is completed. Here, once it is determined that the operation has not been completed (NO in step 709), the process returns to step 705 and the operation of the AC servo press device 100 is continued. If it is determined in step 709 that the operation of the AC servo press device 100 is completed (YES in step 709), the power of the AC servo press device 100 is turned off (step 710), and the process ends.

Although it is constructed in the above structure: when the punching plate 30 is lowered, before "the main drive motors 40a, 40b drive the booster mechanisms 60a, 60b and start the lowering control of the punching plate 30", the auxiliary drive motors 50a, 50b are used to pair The crank mechanisms 80a, 80b are driven to execute the high-speed lowering control of the punching plate 30. When the punching plate 30 is raised, the crank mechanisms 80a, 80b are driven by the auxiliary drive motors 50a, 50b, and the high-speed rising control of the punching plate 30 is ended. After that, the main drive motors 40a, 40b are used to drive the booster mechanisms 60a, 60b to execute the ascending control of the punching plate 30, but it can also be configured: when the punching plate 30 is lowered, the main drive motors 40a, 40b drive the booster mechanism 60a, 60b, the lowering control of the stamping plate 30" and "auxiliary drive When the motors 50a, 50b drive the crank mechanisms 80a, 80b, the high-speed descent control of the stamping plate 30" is executed at the same time. When the stamping plate 30 rises, "the main drive motors 40a, 40b drive the booster mechanism 60a, 60b, the stamping plate 30 The "lift control" and the "high-speed lift control of the punch plate 30 when the auxiliary drive motors 50a, 50b drive the crank mechanisms 80a, 80b" are executed simultaneously. According to such a configuration, the lowering control of the punching plate 30 and the raising control of the punching plate 30 can be executed in a shorter time.

Fig. 12 is a flowchart for explaining another example of the pressing plate lowering process of the flowchart shown in Fig. 7 for forming the above-mentioned structure.

In Fig. 12, once the press plate lowering process is started, first, the foot switch 95 is turned on (step 1201), and then the main drive motors 40a and 40b are turned on via the main drive motor control unit 602, and the sub The drive motor control unit 603 turns on the auxiliary drive motors 50a and 50b, and executes the high-speed lowering control of the punch plate 30 (step 1202).

Then, according to the detection signals of the offset phase detection sensors 93a, 93b, it is investigated whether the offset phases of the offset discs 81a, 81b have formed a lower limit (step 1203). Here, when the offset discs 81a, When the offset phase of 81b has not reached the lower limit (NO in step 1203), it returns to step 1202 and continues the high-speed descent control of the punching plate 30. Once it is determined in step 1203 that the offset phases of the offset discs 81a and 81b have become When the lower limit is reached (YES in step 1203), the sub-driving motor control unit 603 turns off the sub-driving motors 50a and 50b (step 1204).

After that, continue "the main drive motor control unit 602 makes the main When the drive motors 40a and 40b are turned ON, the force mechanism 60a, 60b controls the lowering of the stamping plate 30 (step 1205). According to the detection signals of the stamping plate position detection sensors 91a and 91b, it is investigated whether the stamping plate 30 is The starting position of the workpiece has been reached (step 1206). Here, once it is determined that the punching plate 30 has not reached the processing start position of the workpiece (NO in step 1206), it returns to step 1205 and continues the lowering control of the punching plate 30 by the force applying mechanisms 60a and 60b. When it is determined in step 1206 that the punching plate 30 has reached the processing start position of the workpiece (YES in step 1206), the main drive motor control unit 602 controls the main drive motors 40a and 40b to OFF (step 1207), and ends the press Board drop processing.

Figure 13 is used to illustrate the simultaneous execution of "when the main drive motors 40a, 40b drive the booster mechanisms 60a, 60b, the ascending control of the punch plate 30" and "the auxiliary drive motors 50a, 50b drive the crank mechanism 80a, 80b, press In the case of the high-speed ascent control of the plate 30", a flowchart of another example of the stamping origin restoration process of the flowchart shown in FIG. 7.

In Fig. 13, once the press origin restoration process is started, first, it is checked whether the foot switch 95 is turned on (step 1301). Here, once it is determined that the foot switch 95 is not ON (NO in step 1301), the process returns to step 1301 and waits for the determination that the foot switch 95 is ON. Once it is determined in step 1301 that the foot switch 95 is turned on (YES in step 1301), the main drive motors 40a and 40b are turned on via the main drive motor control unit 602, and the auxiliary drive is turned on via the sub drive motor control unit 603 The motors 50a, 50b are turned ON, and the punching plate 30 is executed The high-speed ascent control (step 1302).

Then, according to the detection signals of the offset phase detection sensors 93a, 93b, it is investigated whether the offset phase of the offset discs 81a, 81b has formed an upper limit (step 1303). Here, when the offset discs 81a, When the offset phase of 81b does not form an upper limit (NO in step 1303), return to step 1302 and continue the high-speed ascent control of the punch plate 30. Once it is determined in step 1303 that the offset phases of the offset discs 81a and 81b have become When the upper limit is reached (YES in step 1303), the sub-driving motor control unit 603 turns off the sub-driving motors 50a and 50b (step 1304).

After that, continue "when the main drive motor control unit 602 turns on the main drive motors 40a, 40b, the booster mechanism 60a, 60b controls the lifting of the punching plate 30 (step 1305)", and detects and senses the position of the punching plate The detection signals of the devices 91a and 91b are used to investigate whether the punching plate 30 has reached the top dead center of the workpiece (step 1306). Here, once it is determined that the punching plate 30 has not reached the top dead center (NO in step 1306), it returns to step 1305 and continues the lifting control of the punching plate 30 by the force applying mechanisms 60a and 60b. Once in step 1306 When it is determined that the punch plate 30 has reached the top dead center (YES in step 1306), the main drive motor control unit 602 controls the main drive motors 40a, 40b to OFF (step 1307), and ends the return of the punch plate origin deal with.

The present invention is not limited to the above-mentioned embodiments. As long as the technical idea of the present invention is within the scope of the present invention, the industry can derive various modifications with general creative ability.

For example, in the above embodiment, although the display will add A structure in which the force mechanism and the crank mechanism are arranged at two positions at both ends of the device, but the force mechanism and the crank mechanism may also be arranged at 3 or more positions including the middle point of the device.

In addition, in the above embodiments, although it is shown that the AC servo press device of the present invention is applied to an AC servo-driven plate bending machine, it can also be applied to other press forging machines.

A: Arrow (direction of rotation)

B: Arrow (direction of rotation)

10a: side panel

20: Base

30: stamping plate

30a, 30b: bearing part

40a: main drive motor

41a, 41b: reciprocating rod

42a, 42b: moving body

43a: Installation Department

44a, 44b: pin

60a, 60b: Afterburner

61a, 61b: pin

62a, 62b: pin

63a, 63b: shaft

64a: Link plate

70a, 70b: Pressing rod for stamping plate

71a, 71b: pin

81a, 81b: offset disc

91a, 91b: Stamping plate position detection sensor

92a, 92b: Link plate deviation detection sensor

96a, 96b: cylinder

Claims (6)

An AC servo stamping device, characterized by: having: a plurality of main drive motors, which are the main power source; and a plurality of reciprocating rods, which are installed at least on both sides of the AC servo stamping device, and are respectively reciprocated by the aforementioned main drive motors The moving body on the shaft; and the press plate pressing rods, which are provided at least at both ends of the aforementioned AC servo press device used to press the press plate; and a plurality of force applying mechanisms, equipped with connecting plates, and used to apply force to the point of application The force of the part is multiplied and transmitted to the point of action of the pressing rod of the punching plate. The connecting plate has the force point part on the moving body of the reciprocating rod, and the pressing rod of the punching plate has the The point of action; and a plurality of auxiliary drive motors, which are auxiliary power sources; and a plurality of crank mechanisms, the offset phases are respectively controlled by the auxiliary drive motors, and the offset phases are used to move the punching plate pressing rod up and down In the vertical movement control of the punching plate pressing rod by the main drive motor, an independent and high-speed control is formed. The lowering control of the punching plate pressing rod by the driving force of the main drive motor causes the punching plate to descend and counteract The workpiece, that is, the workpiece is pressed and processed, by the crank mechanism, during the non-pressing processing of the workpiece, the high-speed vertical movement of the punching plate is controlled. For example, the AC servo press device described in item 1 of the scope of patent application, wherein the reciprocating rod is rotatably mounted on the AC servo In the clothing pressing device, the end of the pressing rod of the pressing plate is rotatably connected to the pressing plate. For example, the AC servo press device described in item 1 or 2 of the scope of patent application, wherein the crank mechanism part is equipped with an offset disc, and the offset phase of the offset disc is controlled by the auxiliary drive motor, thereby controlling The press plate pressing rod moves up and down at high speed. The offset disc has a rod shaft that serves as a fulcrum of the connecting plate at a position eccentric from the central axis by a specific distance, and is housed in the side plate of the AC servo press device. The AC servo press device described in item 1 or 2 of the scope of patent application, wherein when the press plate is lowered, before the start of the lowering control of the press plate by the main drive motor, the auxiliary drive motor is executed to the press plate When the punching plate is raised, after the high-speed raising control of the punching plate by the auxiliary drive motor, the raising control of the punching plate by the main drive motor is executed. The AC servo press device described in the first or second patent application, wherein when the press plate is lowered, when the main drive motor controls the lowering of the press plate, the auxiliary drive motor simultaneously performs the control of the press plate The high-speed descending control of the high-speed descent control, when the punching plate is raised, is executed at the same time as the main drive motor for the rising control of the punching plate during the high-speed ascending control of the punching plate by the auxiliary drive motor. For example, the AC servo stamping device described in item 1 or 2 of the scope of patent application is further equipped with: stamping plate position detection sensor for detecting the upper and lower sides of the aforementioned stamping plate Moving position; and a reciprocating rod position detection sensor for detecting the moving position of the moving body on the reciprocating rod; and a link plate deviation detecting sensor for detecting the position deviation of the link plate; And the offset phase detection sensor, used to detect the offset phase of the crank mechanism; and the main drive motor control means, based on the detection sensor from the punch plate position, the reciprocating rod position detection The sensor, the detection signal of the aforementioned link plate deviation detection sensor, controls the aforementioned main drive motor; and the auxiliary drive motor control means, based on the detection sensor from the aforementioned stamping plate position and the aforementioned reciprocating rod position The detection signals of the detecting sensor, the link plate deviation detecting sensor, and the stamping offset phase detecting sensor control the auxiliary driving motor.

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