JP2010075987A - Press machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To greatly lessen a burden on a user in the setting and adjustment of the operation of a press machine. <P>SOLUTION: An input device 33 operable by a man is provided for setting the operating speed for determining the operation pattern of a slide 9 at each point of time in one press cycle. The input device 33 can be operated by the man so as to optionally select either the speed of rotational motion by a drive motor 7 or the speed of vertical motion of the slide 9, and be able to set the selected rotational motion speed or vertical motion speed as the operating speed at the corresponding point of time. A computing device is provided which computes the operation pattern on the basis of the operating speed set for each point of time by the input device 33. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a press machine.

  In the press machine, the rotational movement by the drive motor is converted into the up-and-down movement of the slide. An upper mold is attached to the lower surface of the slide. A lower mold is disposed below the upper mold. A press work is performed by sandwiching a workpiece such as a panel between the upper mold and the lower mold.

  In a press machine using a servo motor as a drive motor, the slide operation can be set so as to freely accelerate and decelerate the slide during one press cycle. This is because the rotation speed of the servo motor can be set freely. One press cycle refers to a period from when the slide descends to press-mold the workpiece, and then rises to return to a predetermined standby position.

The above-described slide operation can be set by designating each time point in one press cycle and setting an operation speed for each time point.
The designation of each point in time in one press cycle is made by the raising / lowering position of the raising / lowering movement of the slide or the rotation angle of the rotational movement. When each time point is specified by the rotation angle of the rotary motion, each time point is specified by the rotation angle of the rotation shaft of the drive motor, or the crankshaft connected between the drive motor and the slide Each time point is specified by a rotation angle.
The operation speed is designated by the ascending / descending speed of the elevating movement or the rotating speed of the rotating movement. When the operation speed is set at the up / down speed, the slide up / down speed is set at each designated time point. When setting the operation speed with the rotation angle of the rotary motion, the rotation speed of the rotation shaft of the drive motor or the rotation speed of the crankshaft is set for each designated time point.

As prior art documents of the present application, for example, there are the following patent documents 1 and 2.
JP 2004-1016 A Japanese Patent No. 4131627

  In the above-described slide operation setting, each time point in one press molding period is specified in either the ascending / descending position or the rotation angle, and the operation speed setting for each time point is the ascending / descending speed or rotating speed. It was made in either unit.

In such a method, as described below, the burden on the user who performs operation setting and operation adjustment of the press machine may increase.
That is, when it is desired to set the ascending / descending speed as an operating speed at a certain point in one press cycle and to set the rotational speed as an operating speed at another point, the elevating speed is changed from the ascending / descending speed to the rotating speed at any one point. Unit conversion or reverse unit conversion is required. Such unit conversion has been a heavy burden for users of press machines.
Even when one point in one press cycle is specified by the lift position and another time point is specified by the rotation angle, the unit from the lift position to the rotation angle is specified in either time point. Conversion or reverse unit conversion is required. Such unit conversion is also a heavy burden for the press machine user.

  Therefore, an object of the present invention is to provide a press machine that can greatly reduce the burden on the user in the operation setting and operation adjustment of the press machine.

In order to achieve the above object, according to the present invention, an upper mold and a lower mold that are press-molded with a workpiece interposed therebetween,
A drive motor for driving the upper mold;
A conversion mechanism that converts the rotational movement by the drive motor into the up-and-down movement of the slide to which the upper mold is fixed, and a press machine comprising:
An operation pattern storage device for storing an operation pattern of the slide in one press cycle for press-molding a workpiece once;
A slide control device for controlling the drive motor based on the operation pattern;
An input device that can be operated by a person so that an operation speed for determining the operation pattern can be set for each time point in the one press cycle,
The input device arbitrarily selects either the rotational speed of the rotary motion or the vertical speed of the lifting motion at each time point, and uses the selected rotational speed or the lifting speed as the operation speed at the time point. It can be operated by a person so that it can be set to the desired value.
A press machine is provided, further comprising a calculation device that calculates the operation pattern based on the operation speed set for each time point by the input device.

In the above-described press machine of the present invention, the input device arbitrarily selects one of the rotational speed of the rotary motion and the vertical speed of the lift motion by a human operation, and the selected rotational speed or the lift The calculation device is configured to be able to set the speed as the operation speed at the time, and the calculation device calculates the operation pattern based on the operation speed set for each time by the input device. When the speed is set as the operation speed and the elevation speed is set as the operation speed at another time, it is not necessary for the user to perform a unit conversion between the rotation speed and the elevation speed. Therefore, the burden on the user in press machine adjustment is greatly reduced.
In particular, the present invention is very effective in the following cases. The press molding period in which the upper mold and the lower mold are in contact with the workpiece to perform press molding can adjust the formability of the workpiece by adjusting the lifting and lowering speed of the slide. Then, there are cases where it is desired to directly set the lifting speed. On the other hand, after the slide reaches the bottom dead center, there is a case where it is desired to directly set the maximum rotational speed of the rotational motion in order to raise the slide as soon as possible. In this regard, in the present invention, the formability is adjusted by directly setting the lifting speed during the press molding period, and at the same time, the maximum rotational speed of the rotational motion is directly set after the slide reaches the bottom dead center. It is possible and very effective.
Furthermore, in the present invention, it is possible to set to change the descending speed of the slide during press molding. For example, it is possible to set the slide to stop at an arbitrary lifting position (for example, bottom dead center) during press molding, and it is also possible to set the slide to be lifted by reversely rotating the drive motor from this lifting position. This makes it possible to finely control the amount of work piece flowing into the upper mold or the lower mold, and to suppress the occurrence of “cracking” and “wrinkles”. Therefore, according to the present invention, an operation setting having a higher degree of freedom than that of the prior art is realized, and restrictions on user settings are greatly relaxed.
Also, in the return section where the drive motor rotates in reverse, the slide once raised by this reverse rotation is stopped, and the rotation of the drive motor is reversed and returned to the normal rotation, so that it passes the bottom dead center (again). Such a setting is also possible, and the restriction on the operation setting can be greatly relaxed as compared with the prior art.

According to a preferred embodiment of the present invention, the input device is operable by a person so that the respective time points can be designated,
The input device can be operated by a person at each time point so that the time point can be designated by either the lift position of the lift movement or the rotation angle of the rotary movement.

  Since the input device can be operated by a person so that the time point can be specified at either the lifting position of the lifting movement or the rotation angle of the rotary movement at each time point, a certain time point is specified by the lifting position. However, when it is desired to designate another time by the rotation angle, it is not necessary for the user to perform a unit conversion between the lift position and the rotation angle. Therefore, the burden on the user in press machine adjustment is greatly reduced.

Further, according to a preferred embodiment of the present invention, the display device displays the operation pattern calculated by the calculation device,
The operation pattern is the following relationship (A) and (B) or the following relationship (C) and (D).
(A) Elapsed time or a variable whose value advances in proportion to the elapsed time (B) Elevating position of the elevating movement, elevating speed of the elevating movement, or rotation angle of the rotating movement at the elapsed time or each value of the variable Or the rotational speed of the rotary motion (C) the lift position of the lift motion or the rotation angle of the rotary motion (D) the lift of the lift motion at each value of the lift position of the lift motion or the rotation angle of the rotary motion Speed or rotational speed of the rotary motion

Thus, since the above-described operation pattern can be displayed on the display device, the operation pattern can be confirmed on the display device. Therefore, an operation pattern setting error can be prevented, which is convenient for operation pattern setting adjustment.
Preferably, the display device displays the operation pattern as a graph. Thereby, the operation pattern can be visually confirmed.

According to a preferred embodiment of the present invention, the display device displays the following (a) and (b) simultaneously.
(A) Relationship between (A) and the lift position or rotation angle of (B) (b) Relationship between (A) and the lift speed or rotation speed of (B)

  Thus, by simultaneously displaying (a) and (b), not only can the time change of the lift position or the rotation angle be confirmed throughout the press cycle, but at the same time, the lift speed or The time change of the rotational speed can also be confirmed.

According to a preferred embodiment of the present invention, the die cushion device is provided,
This die cushion device has a movable part that descends while sandwiching the workpiece between the upper die and the upper die when the workpiece is press-molded between the upper die and the lower die,
A driving device for applying a cushioning force to the movable part;
A cushion pattern storage device for storing a cushion pattern of the cushion force in the one press cycle;
A cushion control device that controls the drive device based on the cushion pattern,
The input device is operable by a person so that a cushion force for determining the cushion pattern can be set for each time point in the one press cycle,
The respective time points for defining the cushion pattern are any of the above time points related to the setting of the operation speed, or any other time points.

Thus, since the input device can be operated by a person so that the cushion force for determining the cushion pattern can be set at each time point in the one press cycle, it is adapted to the slide movement pattern. Cushion pattern can be set easily. Therefore, the complexity of setting the cushion pattern in accordance with the slide operation pattern can be eliminated, and the burden of setting and adjusting the cushion force by the user is greatly reduced.
For example, while confirming the operation pattern displayed on the display device, the cushion force can be set at each time point, and the burden of adjusting the cushion force by the user is greatly reduced.
In addition, each time point defining the cushion pattern may be any time point other than the respective time points when the operation speed is set, so the cushion force is set at a time point other than the time point when the operation speed is set. Alternatively, even when it is desired to change, such setting and changing can be easily performed, and the burden of setting and adjusting the cushion force by the user is greatly reduced.

According to a preferred embodiment of the present invention, the upper die and the lower die attached to the press machine can be changed to different upper die and lower die,
A data management device that stores the operation pattern in association with identification information indicating the upper mold and the lower mold for each of the upper mold and the lower mold,
By inputting the identification information to the data management device, the operation pattern associated with the identification information is used by the control device.

  Thus, by inputting the identification information to the data management device, the operation pattern associated with the identification information is automatically used by the control device. In the press machine operation setting, the burden on the user is greatly reduced.

  According to the above-described present invention, it is possible to greatly reduce the burden on the user in the operation setting and operation adjustment of the press machine.

  The best mode for carrying out the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a configuration diagram of a press machine 10 to which the present invention is applicable. As shown in FIG. 1, a press machine 10 includes an upper die 3 and a lower die 5 that are press-molded with a workpiece 1 interposed therebetween, a drive motor 7 for driving the upper die 3, and a drive motor 7. And a conversion mechanism 11 that converts the rotational movement by the above-described movement into the up-and-down movement of the slide 9 to which the upper mold 3 is fixed. The drive motor 7 is a servo motor whose rotation angle and rotation speed are freely controlled. The conversion mechanism 11 converts one rotation of itself into one reciprocating motion of the slide 9, and is a crankshaft in the example of FIG. The present invention can be applied not only to a crank press using a crankshaft but also to a crankless press, a link press, a knuckle press, and the like. In the example of FIG. 1, the rotational driving force is transmitted from the drive motor 7 to the conversion mechanism 11 via the pinion 13 and the main gear 15. The crankshaft 11 and the slide 9 are connected by a connecting rod 17. Further, the present invention can be applied not only to the press machine 10 that drives the slide 9 at one place (the connecting place of the connecting rod 17) as shown in FIG. 1, but also the slide 9 is driven at a plurality of places such as two places and four places. The present invention can also be applied to a press machine 10 such as a crank press, a crank press, or a link press.

  The press machine 10 further includes an operation pattern storage device 19 and a slide control device 21 in order to control the slide operation. The motion pattern storage device 19 stores a motion pattern of the slide 9 in one press cycle for press-molding the workpiece 1 once. The slide control device 21 controls the drive motor 7 based on the operation pattern. The operation pattern will be described in detail later.

  A die cushion device 23 is provided in the press machine 10 of FIG. The die cushion device 23 is a movable part that descends while the workpiece 1 is sandwiched between the upper die 3 and the workpiece 1 is press-molded between the upper die 3 and the lower die 5. 25, and a driving device 27 for applying an upward cushioning force to the movable portion 25. The movable portion 25 includes a blank holder 25a that contacts the workpiece 1 during press molding and sandwiches the workpiece 1 between the upper mold 3, a cushion pin 25b that supports the blank holder 25a from below, and a cushion pin. And a cushion plate 25c that supports 25b from below.

  The die cushion device 23 includes a cushion pattern storage device 29 and a cushion control device 31 in order to control the cushion force. The cushion pattern storage device 29 stores a cushion force pattern determined for the drive device 27. The cushion control device 31 controls the drive device 27 based on the cushion force pattern. The cushion force pattern will be described in detail later.

FIG. 2 is a diagram showing the relationship between the rotation angle θ of the crankshaft 11 and the lift position y of the slide 9. In FIG. 2, l ₁ is the eccentric distance of the crankshaft 11, and l ₂ is the length of the connecting rod 17. The relational expression between θ and y is expressed by the following [Equation 1].

  As can be seen from [Equation 1], the relationship between the rotation angle θ and the lift position y is a non-linear function, and when the crankshaft 11 is rotated at a constant rotational speed, the lift speed of the slide 9 is not constant, and vice versa. In addition, when the ascending / descending speed of the slide 9 is constant, the rotational speed of the crankshaft 11 is not constant.

In this regard, when considering the up-and-down movement of the slide 9, the formability when the slide 9 press-molds the workpiece 1 depends on the up-and-down speed of the slide 9. Therefore, it is desirable that the elevation speed of the slide 9 can be directly controlled during press molding.
In order to move the slide 9 up and down the fastest, it is desirable to rotate the drive motor 7 or the crankshaft 11 driving the crankshaft 11 at the maximum rotational speed. In this case, it is desirable to be able to control the crank angular velocity.
Therefore, in the embodiment of the present invention described below, for the section in which the user wants to specify the lifting speed of the slide 9, the lifting speed of the slide 9 is directly set and controlled, and in the other sections, the drive motor 7 Alternatively, the rotational speed of the crankshaft 11 can be directly set and controlled.

[First Embodiment]
(Configuration of operation setting device)
FIG. 3 shows a configuration of the operation setting device 20 provided in the press machine 10 according to the first embodiment. The operation setting device 20 includes an input device 33, a display device 35, and a calculation device 37. The input device 33 is a keyboard, mouse, touch panel or the like that can be operated by a person, and an operation pattern can be determined by this operation. The movement pattern is obtained based on the movement speed relating to the sliding movement determined at each time point in the one press cycle.

(Specify time)
By operating the input device 33 by a person, the respective time points for setting the operation speed can be designated. That is, the input device 33 can be operated by a person so that each time point can be specified. Further, the designation of each time point by the input device 33 can be designated by either the ascending / descending position of the ascending / descending motion or the rotation angle of the rotating motion. In other words, the input device 33 can be operated by a person so that at each time point, the time point can be designated by either the lift position of the lift motion or the rotation angle of the rotary motion.
FIG. 4 is an example of an input screen displayed by the display device 35. In FIG. 4, each time point (six time points) in one press cycle is designated. The numerical value at the time point designated by the input device 33 is underlined. Specifically, the time point 1 is designated as 0.0 deg (that is, the initial position of the slide 9) by the rotation angle θ of the rotational movement of the crankshaft 11, and the time point 2 is designated as 450.00 mm at the lift position y of the slide 9. Is specified as 300.00 mm at the lift position y of the slide 9, and the time 4 is specified as 160.0 deg as the rotation angle θ of the rotational movement of the crankshaft 11, and the time 5 is set as the crankshaft. 11 is designated as 180.0 deg (that is, the bottom dead center of the slide 9), and the time point 6 is designated as 360.0 deg (ie, that of the slide 9). The initial position is specified.
For each time point 1, 4 to 6 specified by the rotation angle θ of the crankshaft 11, the lift position y of the slide 9 corresponding to this rotation angle θ is automatically calculated by the calculation device 37 and displayed as shown in FIG. The On the other hand, for each time point 2 and 3 designated by the lift position y of the slide 9, the rotation angle θ corresponding to the lift position y is automatically calculated by the calculation device 37 and displayed as shown in FIG.

(Operation speed setting)
When each time point is designated, the operation speed can be set by the input device 33 for each designated time point. That is, the input device 33 can be operated by a person so that an operation speed for determining the operation pattern can be set at each time point in the one press cycle. Further, at each time point, the input device 33 arbitrarily selects either the rotational speed of the rotational motion or the lifting speed of the lifting motion, and sets the selected speed to an arbitrary value as the operating speed at the time point. Can be set. That is, the input device 33 arbitrarily selects one of the rotational speed of the rotary motion and the lift speed of the lift motion at each time point, and the selected rotational speed or lift speed is the operating speed at the time point. It can be operated by a person so that it can be set as
In FIG. 4, the numerical value of the operation speed set by the input device 33 is underlined. In the example of FIG. 4, the rotational speed 20.0 spm (stroke per minute) of the crankshaft 11 is set as the operating speed at the time point 1, and the rotational speed 8.0 spm of the crankshaft 11 is set as the operating speed at the time point 2. As the operation speed at time point 3, the elevating speed of the slide 9 is set to -500.0 mm / sec. As the operation speed at time point 4, the elevating speed of the slide 9 is set to -500.0 mm / sec. The rotational speed 20.0 spm of the crankshaft 11 is set, and the rotational speed 20.0 spm of the crankshaft 11 is set as the operation speed at the time point 6.
For each time point 1, 2, 5, 6 at which the rotation speed of the crankshaft 11 is set, the ascending / descending speed of the slide 9 corresponding to the set rotation speed is automatically calculated by the calculation device 37 and displayed as shown in FIG. The On the other hand, for each time point 3 and 4 when the rotation speed of the slide 9 is set, the rotation speed of the crankshaft 11 corresponding to the set rotation speed is automatically calculated by the calculation device 37 and displayed as shown in FIG.

(Calculation and display of operation pattern)
An operation pattern is calculated from input data from the input device 33. That is, the calculation device 37 calculates the operation pattern based on the operation speed set for each time point. The calculated operation pattern is displayed by the display device 35. The calculated operation pattern is the following relationship (A) and (B) or the following relationship (C) and (D).
(A) Elapsed time or a variable whose value advances in proportion to the elapsed time (B) Elevating position of the elevating movement, elevating speed of the elevating movement, or rotation angle of the rotating movement at the elapsed time or each value of the variable Or the rotational speed of the rotary motion (C) the lift position of the lift motion or the rotation angle of the rotary motion (D) the lift of the lift motion at each value of the lift position of the lift motion or the rotation angle of the rotary motion The speed or the rotational speed of the rotational motion The display device 35 may simultaneously display the following (a) and (b).
(A) Relationship between (A) and the lift position or rotation angle of (B) (b) Relationship between (A) and the lift speed or rotation speed of (B)

  FIGS. 5A to 5C, 6 </ b> A, and 6 </ b> B are graphs showing examples of operation patterns calculated by the calculation device 37 based on input data from the input device 33. Is displayed. 5A, the horizontal axis indicates time, the vertical axis indicates the lift position of the slide 9, and in FIG. 5B, the horizontal axis indicates time, and the vertical axis indicates the lift speed of the slide 9. In (C), the horizontal axis represents time, and the vertical axis represents the rotational speed of the crankshaft 11. 6A, the horizontal axis indicates the lift position of the slide 9 and the vertical axis indicates the lift speed of the slide 9. In FIG. 6B, the horizontal axis indicates the rotation angle of the crankshaft 11 and the vertical axis indicates the crank. The rotational speed of the shaft 11 is shown. As shown in FIG. 5 and FIG. 6, during each designated time point, the lifting position, lifting speed, and rotation speed of the slide 9 are set to the values on the horizontal axis (time, slide lifting position, crankshaft rotation angle). On the other hand, it is calculated and interpolated by the calculation device 37 so as to change continuously. Any one of the operation patterns in FIGS. 5A, 5B, 6C, 6A, and 6B may be calculated by the calculation device 37 and displayed on the display device 35. A plurality or all of them may be calculated by the calculation device 37 and displayed on the display device 35. In FIGS. 5A to 5C, the horizontal axis indicates time, but instead of time, other variables whose values progress in proportion to the passage of time during one press cycle are used. Also good.

(Memory of operation pattern)
The calculation device 37 calculates an operation pattern that matches the configuration of the slide control device 21 as described above, outputs the operation pattern to the operation pattern storage device 19, and stores the operation pattern in the operation pattern storage device 19. When the calculation device 37 calculates a plurality of motion patterns, one of the calculated motion patterns that matches the configuration of the slide control device 21 is output from the calculation device 37 to the motion pattern storage device 19. And stored in the operation pattern storage device 19. That is, when the slide control device 21 detects the raising / lowering position of the raising / lowering motion at each time point in one press cycle and controls the power supplied to the drive motor 7 based on the detected value, The operation pattern stored in the pattern storage device 19 is a relationship between the elapsed time or the variable and the lift position of the lift movement at each value of the elapsed time or the variable. When the slide control device 21 detects the ascending / descending speed of the ascending / descending motion at each time point in one press cycle and controls the power supplied to the drive motor 7 based on the detected value, the operation pattern is stored. The operation pattern stored in the device 19 is the relationship between the elapsed time or the variable and the elevating speed of the elevating movement at each value of the elapsed time or the variable. The slide control device 21 detects the rotational angle of the rotational motion (the rotational angle of the crankshaft 11 or the drive motor 7) at each time point in one press cycle, and based on this detected value, applies to the drive motor 7 When the supplied power is controlled, the operation pattern stored in the operation pattern storage device 19 includes the elapsed time or the variable, and the rotation angle (crank shaft 11) of the rotation motion at each value of the elapsed time or the variable. Or the rotation angle of the drive motor 7). The slide control device 21 detects the rotational speed of the rotary motion (the rotational speed of the crankshaft 11 or the drive motor 7) at each time point in one press cycle, and based on this detected value, When the supplied power is controlled, the operation pattern stored in the operation pattern storage device 19 includes the elapsed time or the variable, and the rotational speed of the rotary motion at each value of the elapsed time or the variable (the crankshaft 11). Or the rotational speed of the drive motor 7).

(Control based on operation pattern)
The slide control device 21 is a slide motion detector that detects the lift position of the lift motion, the lift speed of the lift motion, the rotational angle of the rotational motion, or the rotational speed of the rotational motion as an operating position or an operating speed. (Not shown). The slide motion detector is, for example, a linear encoder when detecting the lift position, and when detecting the lift speed, the position detection value by the linear encoder is time-differentiated to detect the rotation angle. In this case, it is a rotary encoder, and when the rotational speed is detected, the rotational angle detection value by the rotary encoder may be time-differentiated.
The slide control device 21 is configured such that at the time of each value of the elapsed time in one press cycle, the operation position or the operation speed is determined by the operation pattern based on the detection value and the operation pattern by the slide operation detector. The power supplied to the drive motor 7 is controlled via the driver 7a so that the operation position or the operation speed at the time is reached. Examples of this control method include feedback control and a combination of feedback control and feedforward control.

According to the first embodiment, in the press machine of the present invention described above, the input device 33 arbitrarily selects either the rotational speed of the rotary motion or the vertical speed of the lift motion by a human operation, and the selection The calculation device 37 calculates the operation pattern based on the operation speed set for each time point by the input device 33. Therefore, when it is desired to set the rotational speed as an operating speed at a certain time and to set the lifting speed as an operating speed at another time, it is necessary for the user to perform a unit conversion between the rotational speed and the lifting speed. Disappears. Therefore, the burden on the user in press machine adjustment is greatly reduced.
In particular, the present invention is very effective in the following cases. For the press forming period in which the pair of molds are in contact with the workpiece 1 and press forming is performed, the formability of the workpiece 1 can be adjusted by adjusting the lifting speed of the slide 9, so press forming In some periods, it may be desired to set the lifting speed directly. On the other hand, after the slide 9 reaches the bottom dead center, there is a case where it is desired to directly set the maximum rotational speed of the rotational motion in order to raise the slide 9 as soon as possible. In this regard, the present invention adjusts the formability by directly setting the elevation speed during the press molding period, and at the same time, directly sets the maximum rotational speed of the rotary motion after the slide 9 reaches the bottom dead center. It is possible to do and is very effective.

(Stop slide)
In the first embodiment described above, it is also possible to set the slide 9 to stop at any lift position (for example, bottom dead center) during press molding. In this case, when the user operates the input device 33, it is possible to specify the start time and end time of the section in which the slide 9 is to be stopped. However, when the user operates the input device 33, the elapsed time from the start time to the end time is also set. Each of the start time point and the end time point can be designated by either the lift position of the lift movement or the rotation angle of the rotary movement. In addition, since it has stopped, the start time and the end time are the same. Further, when the person operates the input device 33, for each of the start time point and the end time point, any one of the rotation speed of the rotary motion and the lift speed of the lift motion is arbitrarily selected, and the selected rotation The speed or the ascending / descending speed is set to zero as the operation speed at that time. Other points in this case may be the same as the above-described contents (that is, contents from (configuration of operation setting device) to (control based on operation pattern)). That is, the start time and the end time can be handled in the same manner as the above-described times.

(Reverse rotation of drive motor)
Further, it is possible to set the slide 9 to be raised by reversely rotating the drive motor 7 (servo motor) from a desired time point during press molding (including the bottom dead center of the slide 9). In this case, when the user operates the input device 33, it is possible to specify the start time and end time of the section in which the drive motor 7 is to be rotated in reverse. Each of the start time point and the end time point can be designated by either the lift position of the lift movement or the rotation angle of the rotary movement. Further, when the input device 33 is operated by a person, for each of the start time point and the end time point, any one of the rotation speed of the rotary motion and the lift speed of the lift motion is arbitrarily selected, and the selected rotation The speed or the ascending / descending speed can be set to an arbitrary value as the operation speed at that time. The other points in this case may be the same as the above-described content (that is, the content from (configuration of the operation setting device) to (control based on the operation pattern)). That is, the start time and the end time can be handled in the same manner as the above-mentioned time points. The time after the end time is the same as described above.

Thus, it is possible to set the slide 9 to stop at any lift position during press molding, or to set the slide 9 up by reversely rotating the drive motor 7 from a desired point in time during press molding. It is possible to cope with various operation modes. Therefore, the burden on the user is greatly reduced in press machine adjustment when the press is stopped or reversed.
Further, by reverse rotation of the drive motor 7, the moldability may be improved by performing an operation of once separating the upper mold 3 from the workpiece 1 during molding.
Further, by reversely rotating the drive motor 7 after the molding is completed, the slide 9 at the bottom dead center is raised, and the lower mold 5 is switched to perform additional processes such as drilling and cutting off.

  The input device 33 can be operated by a person so that at each time point, the time point can be specified by either the lift position of the lift motion or the rotation angle of the rotary motion. When it is desired to specify at another time by the rotation angle of the rotary motion, the user does not need to perform a calculation for unit conversion between the position of the lifting motion and the rotation angle of the rotary motion. Therefore, the burden on the user in press machine adjustment is greatly reduced.

  Since the above-described operation pattern can be displayed on the display device 35, the operation pattern can be visually confirmed on the display device 35. Therefore, an operation pattern setting error can be prevented, which is convenient for operation pattern setting adjustment.

  The display device 35 displays (a) and (b) at the same time, so that not only can the time change of the lift position or the rotation angle be confirmed throughout the press cycle, but at the same time, the lift speed or The time change of the rotational speed can also be confirmed.

[Second Embodiment]
The operation setting device 20 according to the second embodiment of the present invention has the configuration of the first embodiment and the configuration described below.

  As described above, when a servo motor is used as the drive motor 7, the operation speed of the slide 9 can be freely set at each time point. Therefore, in the second embodiment, the cushioning force can be set for each time point when the sliding motion changes.

  In the second embodiment, the input device 33 can be operated by a person so that a cushion force for determining the cushion pattern can be set at each time point in the one press cycle.

(Cushion force setting)
FIG. 7 is an input screen displayed by the display device 35. In “cushion pattern setting” in FIG. 7, the numerical value underlined is the value set by the input device 33. In the example of FIG. 7, the cushioning force is set for each time point specified in FIG. 4 of the first embodiment. Specifically, 200 ton is set for the cushioning force at time 3 and 200 ton is set for the cushioning force at time 4.
Since the time points 1 and 2 are not in press forming, the cushion force at the time points 1 and 2 is automatically set to 0 ton. Instead, the person can operate the input device 33 to set the cushion positions at the time points 1 and 2 (that is, the standby height of the blank holder 25a). In this example, the cushion positions at the time points 1 and 2 are set to 300.00 mm. Further, FIG. 7 does not show the time points 5 and 6 of FIG. 4, but since the time points 5 and 6 are not in press molding, the cushioning force at the time points 5 and 6 is automatically set to 0 ton. Note that a person may operate the input device 33 to set the cushioning force at each time point other than during press molding. Further, during the press molding (for example, time points 3 and 4), the slide 9 and the movable portion 25 are lowered integrally, so that the cushion position is equal to the lift position of the slide 9.

FIG. 8 is a graph showing a cushion pattern of the die cushion device 23 determined based on the setting of FIG. 7, and is displayed on the display device 35. The upper graph in FIG. 8 shows the cushion position with respect to time (that is, the height of the blank holder 25a). In the upper graph of FIG. 8, the lift position of the slide 9 with respect to time is also shown. The lower graph of FIG. 8 shows the cushioning force with respect to time. That is, the lower graph of FIG. 8 is a graph showing a cushion pattern calculated by the calculation device 37 based on the setting of FIG.
As can be seen from the lower graph in FIG. 8, in this example, each time point is a time point when the cushion force switches discontinuously. Thus, the cushioning force set at each time point is maintained from the time point to the time point specified immediately after the time point.

Alternatively, a time point other than the time point specified when the operation speed of the slide 9 is set may be newly specified, and the cushion force may be set at this new time point.
FIG. 9 shows an input screen when a new time point is designated. In FIG. 9, a new time point α is specified between the time points 3 and 4 in addition to the time points 1 to 6 specified in FIG. 4 of the first embodiment. The new time designation method is the same as in the first embodiment, and is performed by a person operating the input device 33. In FIG. 9, the new time point α is designated by the cushion position of “cushion pattern setting” (that is, the lift position of the slide 9). Further, in “slide pattern setting” in FIG. 9, at the time α, each value is displayed based on the operation pattern calculated by the calculation device 37.
The cushioning force can also be set at this new time α. This setting is also performed by a person operating the input device 33 as described above. In “cushion pattern setting” in FIG. 9, the numerical value underlined is the value set by the input device 33. Specifically, in the example of FIG. 9, the cushioning force at time 3 is set to 200 ton, the cushioning force at time α is set to 150 ton, the cushioning force at time 4 is set to 150 ton, and the cushioning force at time 5 is set. The cushion force at other time points 1, 2, and 6 (not shown) is also set to 0 ton.

FIG. 10 is a graph showing the operation of the die cushion device 23 determined based on the setting of FIG. 9 and is displayed on the display device 35. The upper graph in FIG. 10 shows the cushion position with respect to time. In the upper graph of FIG. 10, the lift position of the slide 9 with respect to time is also shown. The lower graph of FIG. 10 shows the cushioning force with respect to time. That is, the lower graph of FIG. 10 is a graph showing a cushion pattern calculated by the calculation device 37 based on the setting of FIG.
As can be seen from the lower graph in FIG. 10, in this example, each time point is a time point when the cushion force switches discontinuously. Therefore, the cushioning force set at each time point is maintained from the time point to a time point specified immediately after the time point.

(Control based on cushion pattern)
The cushion control device 31 includes a cushion detector that detects cushion force. The cushion control device 31 is configured such that at the time of each value of the elapsed time in one press cycle, the cushion force is determined based on the cushion force detected value by the cushion detector and the cushion pattern. The control target part 27a of the drive device 27 is controlled so as to have a cushioning force. Examples of this control method include feedback control and a combination of feedback control and feedforward control.
When the driving device 27 is a hydraulic cylinder as in the example of FIG. 1, the control target unit 27 a is a servo valve, and the cushion detector uses, for example, the hydraulic pressure in the upper chamber and the hydraulic pressure in the lower chamber. The cushion force is detected from these detected values.

According to the second embodiment, the input device 33 can be operated by a person so that the cushion force for determining the cushion pattern can be set at each time point in the one press cycle. Cushion patterns can be easily set according to the pattern. Accordingly, the complexity of setting / adjusting the cushion pattern in accordance with the operation pattern of the slide 9 can be eliminated, and the burden of setting / adjusting the cushion force by the user is greatly reduced.
For example, while confirming the operation pattern of the slide displayed on the display device 35, the cushion force can be set for each time point, and the burden of adjusting the cushion force by the user is greatly reduced.

[Third Embodiment]
The operation setting device 20 according to the third embodiment of the present invention has the configuration of the first embodiment or the second embodiment and the configuration described below.

  In the press machine 10, the upper mold 3 and the lower mold 5 can be changed to different types of the upper mold 3 and the lower mold 5. In this case, the operation setting device 20 stores the operation pattern and the cushion pattern in association with the identification information indicating the upper die 3 and the lower die 5 for each of the upper die 3 and the lower die 5. Is provided.

By inputting the identification information to the data management device 39, the motion pattern associated with the identification information is automatically used by the slide control device 21, and the cushion pattern associated with the identification information is used as the cushion control device. 31 is automatically used. This input may be made by a person operating the input device 33 or another input means, or may be made by other means such as reading identification information from an identification information holding means (for example, an IC tag).
The data management device 39 may be composed of the motion pattern storage device 19 and the cushion pattern storage device 29, or may be a device different from the motion pattern storage device 19 and the cushion pattern storage device 29 as shown in FIG. There may be. When the data management device 39 is a device different from the motion pattern storage device 19 and the cushion pattern storage device 29, the first upper die 3 and the lower die 5 attached to the press machine 10 are cushion patterns. Is changed to the previously obtained second upper mold 3 and lower mold 5, the identification information indicating the second upper mold 3 and lower mold 5 is input to the data management device 39. Thus, the motion pattern associated with the identification information is automatically output to the motion pattern storage device 19 and stored in the motion pattern storage device 19, and the cushion pattern associated with the identification information is automatically The data is output to the cushion pattern storage device 29 and stored in the cushion pattern storage device 29.

  According to the third embodiment, by inputting the identification information to the data management device 39, the motion pattern associated with the identification information is used for the slide control device 21, and the cushion pattern associated with the identification information is used. Is used in the cushion control device 31, the burden on the user is greatly reduced in the press machine operation setting when changing the die.

  The present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

  For example, in the first to third embodiments described above, it has been described that the rotation angle and rotation speed of the crankshaft 11 are mainly designated or set as the rotation angle and rotation speed of the rotation motion by the drive motor 7. The rotation angle and rotation speed of the drive motor 7 may be designated or set as the rotation angle and rotation speed of the rotation motion by the drive motor 7.

  In the first to third embodiments described above, the operation speed or cushion force of the slide 9 is set for each time point. However, after this setting, the operation speed or cushion force of the slide 9 can be changed for each time point. . This change can be performed by operating the input device 33 as in the first to third embodiments. Also in this case, the same screens as in FIGS. 4, 7, and 9 may be displayed on the display device 35.

  The number of time points that can be specified by the input device 33 may be arbitrary.

  In the second embodiment described above, the calculation device 37 determines and calculates the cushion pattern so that the cushion force changes discontinuously at each time point based on the cushion force set at each time point. The cushion pattern may be calculated so that the cushion force continuously changes with time.

  The drive device 27 may be a device that converts the rotational driving force of the servo motor into an upward cushion force, instead of a device that uses a hydraulic cylinder. In this case, the cushion control device 31 controls a driver that supplies power to the servo motor as the control target portion 27a, and the above-described cushion detector is provided at a location where the drive device 27 presses the cushion plate 25c. The cushion force may be detected based on the strain detection value of the obtained strain gauge.

  The cushion control device 31 performs position control for directly controlling the cushion position on the basis of the cushion position detection value during a period in which the slide 9 does not act on the movable portion 25 during one press cycle, and the slide 9 is movable. In the cushion operation period in which force is applied to the portion 25, load control for directly controlling the cushion force may be performed based on the cushion force detection value. Even in this case, according to the present invention, the cushioning force can be easily set and changed at each time point within the cushion operation period in accordance with the operation of the slide 9.

  In the above description, the rotation angle and rotation speed of the rotation motion by the drive motor 7 are mainly described as the rotation angle and rotation speed of the crankshaft 11. However, the rotation angle and rotation speed of the rotation motion by the drive motor 7 are the same. The rotation angle and the rotation speed may be used.

It is a block diagram of the press machine which can apply this invention. It is a figure which shows the relationship between rotation angle (theta) of a crankshaft, and the raising / lowering position y of a slide. 1 is a block diagram of an operation setting device according to a first embodiment of the present invention. An example of the input screen by 1st Embodiment is shown. It is a graph which shows the operation | movement pattern calculated | required by the calculation apparatus. It is another graph which shows the operation | movement pattern calculated | required by the calculation apparatus. An example of the input screen by 2nd Embodiment is shown. It is a graph which shows the cushion pattern determined based on the setting of FIG. The another example of the input screen by 2nd Embodiment is shown. It is a graph which shows the cushion pattern determined based on the setting of FIG. It is a block diagram of the operation | movement setting apparatus by 3rd Embodiment of this invention.

Explanation of symbols

1 Workpiece, 3 Upper mold, 5 Lower mold, 7 Drive motor, 7a Driver, 9 Slide, 10 Press machine, 11 Conversion mechanism (Crankshaft), 13 Pinion, 15 Main gear, 17 Connecting rod, 19 Operation pattern Storage device, 20 Operation setting device, 21 Slide control device, 23 Die cushion device, 25 Movable part, 25a Blank holder, 25b Cushion pin, 25c Cushion plate, 27 Drive device, 27a Control target part, 29 Cushion pattern storage device, 31 Cushion control device, 33 input device, 35 display device, 37 calculation device, 39 data management device,

Claims (6)

An upper mold and a lower mold that are press-molded with a workpiece sandwiched therebetween;
A drive motor for driving the upper mold;
A conversion mechanism that converts the rotational movement by the drive motor into the up-and-down movement of the slide to which the upper mold is fixed, and a press machine comprising:
An operation pattern storage device for storing an operation pattern of the slide in one press cycle for press-molding a workpiece once;
A slide control device for controlling the drive motor based on the operation pattern;
An input device that can be operated by a person so that an operation speed for determining the operation pattern can be set for each time point in the one press cycle,
The input device arbitrarily selects either the rotational speed of the rotary motion or the vertical speed of the lifting motion at each time point, and uses the selected rotational speed or the lifting speed as the operation speed at the time point. It can be operated by a person so that it can be set to the desired value.
A press machine, further comprising a calculation device that calculates the operation pattern based on the operation speed set for each time point by the input device. The input device is operable by a person so that each time point can be specified,
The input device can be operated by a person so that at each time point, the time point can be designated by either the lift position of the lift motion or the rotation angle of the rotary motion. The press machine described. A display device for displaying the operation pattern calculated by the calculation device;
The press machine according to claim 1 or 2, wherein the operation pattern is the following relationship (A) and (B) or the following relationship (C) and (D).
(A) Elapsed time or a variable whose value advances in proportion to the elapsed time (B) Elevating position of the elevating movement, elevating speed of the elevating movement, or rotation angle of the rotating movement at the elapsed time or each value of the variable Or the rotational speed of the rotary motion (C) the lift position of the lift motion or the rotation angle of the rotary motion (D) the lift of the lift motion at each value of the lift position of the lift motion or the rotation angle of the rotary motion Speed or rotational speed of the rotary motion The press machine according to claim 3, wherein the display device displays the following (a) and (b) simultaneously.
(A) Relationship between (A) and the lift position or rotation angle of (B) (b) Relationship between (A) and the lift speed or rotation speed of (B) Equipped with a die cushion device,
This die cushion device has a movable part that descends while sandwiching the workpiece between the upper die and the upper die when the workpiece is press-molded between the upper die and the lower die,
A driving device for applying a cushioning force to the movable part;
A cushion pattern storage device for storing a cushion pattern of the cushion force in the one press cycle;
A cushion control device that controls the drive device based on the cushion pattern,
The input device is operable by a person so that a cushion force for determining the cushion pattern can be set at each time point in the one press cycle,
5. The time points for defining the cushion pattern are any one of the time points related to the setting of the operation speed, or any other time point, according to claim 1. Press machine. The upper die and the lower die attached to the press machine can be changed to different upper die and lower die,
A data management device that stores the operation pattern in association with identification information indicating the upper mold and the lower mold for each of the upper mold and the lower mold,
6. The operation pattern associated with the identification information is used by the control device by inputting the identification information to a data management device. The press machine according to item.

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