JP5887813B2 - Transfer device for multi-stage forging press - Google Patents

Description

  The present invention relates to a transfer device of a multistage forging press, and more particularly to a transfer device having a function of detecting a conveyance trouble.

  A multi-stage forging press machine such as a hot former (horizontal forging machine) that processes a workpiece into a predetermined shape by sequentially passing through a plurality of forging press processes is known. This multi-stage forging press machine is equipped with a transfer device that sequentially conveys a workpiece to the next process in accordance with the operation of a forging press working section (for example, a set of a die and a punch) provided for each forging press process. Yes.

  The transfer device is provided corresponding to each forging press working part, and has a plurality of chuck mechanisms having a work gripping part (finger) that opens and closes in order to grip and release the work. A moving mechanism for reciprocating the chuck mechanism to sequentially move the workpiece from the previous process to the subsequent process.

  By the way, in this type of multi-stage forging press, when the workpiece is automatically conveyed to each press position by the transfer device, the workpiece is grasped by the workpiece grasping portion (finger) of the chuck mechanism and conveyed to the next process. However, during the transportation, especially when a heavy workpiece is transported at a high speed, a transportation trouble often occurs due to a slight defect.

  When a transport trouble occurs, the cause must be investigated and countermeasures must be taken. Conventionally, when a transport trouble occurs, an operator enters the machine and checks each point, and the trouble occurs. The cause of was being investigated. However, investigating the cause took a long time, and there were many cases where the true cause was not found.

  Therefore, as an example of countermeasures, Patent Documents 1 to 3 disclose a technique for providing a means for detecting a mischuck depending on whether or not a workpiece has been chucked and stopping the equipment abnormally when a mischuck is detected. Yes.

In order to achieve the above-described object, a transfer device for a multistage forging press according to the present invention is characterized by the following (1) to (7) .
(1) A multi-stage forging press machine that processes a workpiece into a predetermined shape by sequentially passing through a plurality of forging press processes, and according to the operation of a forging press working section provided for each forging press process. It is a transfer device for a multi-stage forging press machine that sequentially conveys workpieces to the next process,
A plurality of chuck mechanisms each having a workpiece gripping portion that opens and closes in order to grip or release the workpiece provided corresponding to each of the forging press working portions;
A moving mechanism for reciprocally moving the plurality of chuck mechanisms to sequentially move the workpiece from the previous process to the subsequent process;
A chuck mechanism displacement sensor for detecting the displacement of the movable part when the workpiece gripping portion of the chuck mechanism operates;
Waveform display means for displaying detection data of the chuck mechanism displacement sensor as time-series waveform data;
Equipped with,
The waveform display means displays an effective range on the time series in which the pass / fail judgment based on the waveform data is valid together with the waveform data.
(2) In the transfer device of the multistage forging press machine having the configuration of (1) above,
A moving mechanism displacement sensor for detecting a displacement of a movable part of the moving mechanism for moving the chuck mechanism;
The waveform display means displays the detection data of the chuck mechanism displacement sensor and the detection data of the moving mechanism displacement sensor together as time-series waveform data.
(3) In the transfer device of the multistage forging press machine having the configuration of (1) or (2) above,
The said displacement sensor is provided in the position which detects the displacement of the movable part which carries out a linear motion.
(4) In the transfer device of the multistage forging press machine having the structure according to any one of (1) to (3 ) above,
Pass / fail judgment means for judging pass / fail of the operation of the chuck mechanism by comparing the waveform data based on the detection data of the chuck mechanism displacement sensor with preset waveform data during normal operation.
(5) In the transfer device of the multistage forging press machine having the configuration of (4 ) above,
A time-series effective range in which the determination by the quality determination means based on the waveform data is valid is set in advance, and the determination by the determination means is valid only in the effective range.
(6) In the transfer device of the multistage forging press machine having the structure according to any one of (1) to (5 ) above,
An upper limit value of detection data of the chuck mechanism displacement sensor is set, and an abnormal stop means for abnormally stopping the multistage forging press machine when data exceeding the upper limit value is detected. (7) In the transfer device of the multistage forging press machine having the structure according to any one of (1) to (6 ) above,
Means for logging the waveform data.

  However, as shown in Patent Documents 1 to 3, in an apparatus that detects whether or not a workpiece has been chucked and stops the equipment abnormally, a mischuck is caused when chucking is performed with the workpiece orientation changed. In some cases, it could not be detected, and there was a possibility of missing a mischuck. In addition, this is not a device for pursuing the cause of mischucking, but only for abnormally stopping the equipment. After the equipment has stopped abnormally, the equipment is restarted without knowing the true cause. Is also possible.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to reliably detect a workpiece transfer trouble at a small stage, and to easily pursue and analyze the cause of the trouble. Another object of the present invention is to provide a transfer device for a multi-stage forging press machine that can be used.

In order to achieve the above-described object, a transfer device for a multistage forging press according to the present invention is characterized by the following (1) to (8).
(1) A multi-stage forging press machine that processes a workpiece into a predetermined shape by sequentially passing through a plurality of forging press processes, and according to the operation of a forging press working section provided for each forging press process. It is a transfer device for a multi-stage forging press machine that sequentially conveys workpieces to the next process,
A plurality of chuck mechanisms each having a workpiece gripping portion that opens and closes in order to grip or release the workpiece provided corresponding to each of the forging press working portions;
A moving mechanism for reciprocally moving the plurality of chuck mechanisms to sequentially move the workpiece from the previous process to the subsequent process;
A chuck mechanism displacement sensor for detecting the displacement of the movable part when the workpiece gripping portion of the chuck mechanism operates;
Waveform display means for displaying detection data of the chuck mechanism displacement sensor as time-series waveform data;
It comprises.
(2) In the transfer device of the multistage forging press machine having the configuration of (1) above,
A moving mechanism displacement sensor for detecting a displacement of a movable part of the moving mechanism for moving the chuck mechanism;
The waveform display means displays the detection data of the chuck mechanism displacement sensor and the detection data of the moving mechanism displacement sensor together as time-series waveform data.
(3) In the transfer device of the multistage forging press machine having the configuration of (1) or (2) above,
The said displacement sensor is provided in the position which detects the displacement of the movable part which carries out a linear motion.
(4) In the transfer device of the multistage forging press machine having the structure according to any one of (1) to (3) above,
The waveform display means displays an effective range on the time series in which the pass / fail judgment based on the waveform data is valid together with the waveform data.
(5) In the transfer device of the multistage forging press machine having the structure according to any one of (1) to (4) above,
Pass / fail judgment means for judging pass / fail of the operation of the chuck mechanism by comparing the waveform data based on the detection data of the chuck mechanism displacement sensor with preset waveform data during normal operation.
(6) In the transfer device of the multistage forging press machine having the configuration of (5) above,
A time-series effective range in which the determination by the quality determination means based on the waveform data is valid is set in advance, and the determination by the determination means is valid only in the effective range.
(7) In the transfer device of the multistage forging press machine having the structure according to any one of (1) to (6) above,
An upper limit value of detection data of the chuck mechanism displacement sensor is set, and an abnormal stop means for abnormally stopping the multistage forging press machine when data exceeding the upper limit value is detected.
(8) In the transfer device of the multistage forging press machine having the structure according to any one of (1) to (7) above,
Means for logging the waveform data.

According to the configuration of (1) above, by comparing the displayed current waveform data with the waveform data at the normal time, it is possible to quickly and surely determine whether or not there is an abnormality and deal with it. In other words, if there is an abnormality in the detected waveform data, the status and cause of the conveyance trouble can be analyzed appropriately and easily from the position and size of the abnormal peak or the shape of the waveform data. Is possible. For example, it can be pursued based on the waveform data whether the cause of the conveyance trouble is in the material, mold, chuck, or equipment, so it is possible to quickly classify the type of trouble and reduce the analysis time. It can be shortened. Therefore, even when a conveyance trouble occurs, the operating rate of the facility can be improved.
In addition, since the waveform display means displays the time-series effective range that enables pass / fail judgment based on waveform data together with the waveform data, it normally occurs even during normal times, such as vibration of the workpiece gripping part of the chuck mechanism It is possible to prevent the amplitude of the waveform to be picked up accidentally as a mischuck.

  According to the configuration of (2) above, by displaying the data of the chuck mechanism displacement sensor and the moving mechanism displacement sensor together, it is possible to further improve the analysis accuracy of the cause of the conveyance trouble such as a mischuck. That is, since it is immediately possible to know at which moving timing by the moving mechanism the abnormality of the data of the chuck mechanism displacement sensor, the cause of the conveyance trouble can be easily pursued and the analysis accuracy is improved.

  According to the configuration of (3) above, since the displacement sensor is provided at a position for detecting the displacement of the movable part that moves linearly, the displacement can be detected with high accuracy by a simple sensor. It can contribute to improvement.

According to the configuration of (4) above, the pass / fail judgment means can automatically make a pass / fail judgment based on the detected waveform data. Therefore, even when there is no instruction from the administrator, an automatic stop or the like is performed. Safe operation can be prevented and troubles can be prevented from worsening.

With configuration (5) above, it is possible to prevent the amplitude of a waveform that is normally generated even during normal operation from being picked up as a mischuck, such as vibration of a workpiece gripping portion of the chuck mechanism.

According to the configuration of (6) above, the forging press machine can be stopped abnormally when displacement data exceeding a preset upper limit value is detected, leading to a conveyance trouble involving recovery. However, it is possible to quickly analyze the cause and take countermeasures when the machine stops abnormally with a slight waveform fluctuation. In this case, the sensitivity when detecting an abnormality can be adjusted by finely adjusting the upper limit value, so that the forging press can be stopped without overlooking even a slight chuck error.

According to the configuration of (7) above, it is possible to determine abnormality such as mischucking in real time while viewing the current waveform data displayed by the waveform display means, and of course, the waveform data is logged (data is time-series). Therefore, when an abnormality such as mischuck occurs, the cause of the occurrence can be pursued by analyzing the waveform data retroactively.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the transfer apparatus of one Embodiment of this invention, (a) is a figure which shows the outline | summary of a structure of the multistage forging press machine containing a transfer apparatus, (b) is a figure which shows the processing content of the workpiece | work for each process. It is. It is a top view which shows schematic structure of the said transfer apparatus. 2A and 2B are diagrams illustrating a principle configuration of the transfer device, in which FIG. 1A is a configuration diagram of a mechanism portion that reciprocates a transfer drive rod in an axial direction by a cam mechanism, and FIG. 2B is a cross-sectional view taken along the arrow IIIb-IIIb in FIG. FIG. 5 is a configuration diagram of a mechanism portion that drives the transfer drive rod to swing by another cam mechanism. FIG. 2 is a configuration diagram of a chuck mechanism in the transfer device, in which (a) is a front view showing a state in which three fingers (work gripping portions) are closed and a workpiece is gripped, and (b) is a view of opening fingers. It is a front view which shows a state when the holding | grip of a workpiece | work is cancelled | released. FIG. 5 is a side view of the chuck mechanism, showing a configuration of a mechanism portion that transmits a swinging motion of a transfer drive rod as an opening / closing operation of the chuck mechanism. It is a figure which shows 1st Example of the waveform data containing the abnormal waveform obtained in the transfer apparatus. 6A and 6B are explanatory views of the contents of the abnormality in FIG. 6, in which FIG. 6A is a side view showing that the workpiece comes into contact with the next die when the workpiece is conveyed by the chuck mechanism, and FIG. FIG. 6 is a diagram showing a second embodiment of waveform data obtained by the transfer device, where (a) is a diagram showing waveform data including a current abnormality, and (b) is a diagram showing waveform data at normal time as a comparison. is there. It is a figure which shows 3rd Example of the waveform data obtained in the transfer apparatus. It is a figure which shows the effective range on a time series in the case of quality determination based on the waveform data obtained in the transfer apparatus. It is a figure which shows 4th Example of the waveform data obtained in the same transfer apparatus.

  Hereinafter, a transfer device of a multistage forging press according to an embodiment of the present invention will be described with reference to the drawings.

  The multistage forging press machine M shown in FIG. 1 processes the workpiece W into a predetermined shape (in the illustrated example, the shape of the bearing raceway) by sequentially passing through a plurality of forging press steps S1 to S4. The forging press working parts K1 to K4 provided for each forging press process S1 to S4 and the workpiece W are sequentially conveyed to the next process as indicated by an arrow A1 according to the operations of these forging press working parts K1 to K4. A transfer device 1 is provided. In the figure, S0 indicates a preparation step, and K0 indicates a processing section for the preparation step. In the preparation step S0, the material (work W) is cut by the processing unit K0. Further, the necessary processing is sequentially performed between the steps S1 to S4 of # 1.

  The transfer device 1 is provided corresponding to each forging press working part K1 to K4, and has a plurality (#) of fingers (work gripping parts) 10 that open and close to grip and release the work W. 0 to # 3) chuck mechanism CH0 to CH3 and a moving mechanism (transfer described later) for moving the workpiece W sequentially from the previous process to the subsequent process as indicated by an arrow A1 by reciprocating the plurality of chuck mechanisms CH0 to CH3. And a mechanism mainly including the drive rod 3 and the like. The distance between processes is, for example, about 300 mm to 400 mm.

  The chuck mechanism CH0 of # 0 of the transfer device 1 moves as indicated by an arrow B in the drawing to transfer the workpiece W from the preparation step S0 to the first forging press step S1. Further, the chuck mechanisms CH1 to CH3 of # 1 to # 3 move as indicated by an arrow B in the drawing to sequentially transfer the workpiece W to the next process. That is, the # 1 chuck mechanism CH1 is changed from the first forging press step S1 to the second forging press step S2, and the # 2 chuck mechanism CH2 is changed from the second forging press step S2 to the third forging press step S3. The # 3 chuck mechanism CH3 transfers the workpiece W from the third forging press step S3 to the fourth forging press step S4. The work W conveyed to each step is processed stepwise by the forging press processing portions K1 to K4 for each step, and the forged product is completed in the fourth forging press step S4. The completed forged product is carried out of the machine by a carry-out device (not shown).

  The processing parts K0 to K4 of each stage are arranged on a horizontal straight line at a constant interval, and the transfer device 1 includes a transfer drive rod 3 and a transfer arranged in parallel to the arrangement of the processing parts K0 to K4. And a beam 4. The transfer drive rod 3 and the transfer beam 4 are connected to each other and are slidable in the longitudinal direction (the arrangement direction of the processing parts K0 to K4) with respect to the machine base 2 (see FIG. 2). The reciprocating drive as shown by the arrow X is performed by the cam mechanism 30. Further, the transfer drive rod 3 is rotatably supported and is driven to swing as indicated by an arrow R by a cam mechanism 40 for swing driving. Both cam mechanisms 30 and 40 are connected to a motor 90 which is the same drive source via a gear 80, and the reciprocating motion of the transfer drive rod 3 and the reciprocating motion of the transfer drive rod 3 and the transfer beam 4 are as follows. It synchronizes with the movement of the forging press process parts K1-K4. By using elements other than the cam mechanisms 30 and 40, the swinging motion of the transfer drive rod 3 and the reciprocating motion of the transfer drive rod 3 and the transfer beam 4 are synchronized with the motion of the forging press working parts K1 to K4. It is also possible to configure.

  As shown in FIGS. 2 and 3, the transfer drive rod 3 and the transfer beam 4 are connected to each other by a connecting member 6 and supported by the machine base 2 so as to be slidable in the X direction. In the figure, 5 is a guide rail for guiding the slide of the transfer beam 4. The transfer drive rod 3 is supported so as to be rotatable around its own axis. A spline portion 3 a is formed in a part of the transfer drive rod 3, and a boss portion 42 of the swing lever 41 of the cam mechanism 40 for swing motion is splined to the spline portion 3 a of the transfer drive rod 3. . Therefore, the transfer drive rod 3 is configured to receive the swing motion from the swing lever 41 in a state where the slide motion by the swing motion cam mechanism 30 is allowed.

  The reciprocating cam mechanism 30 includes a connecting rod 32 rotatably connected to the transfer beam 4 via a pin 31, and one end rotatably connected to the connecting rod 32 by a pin 33. 35, and a cam follower 36 provided at the other end of the bell crank 34, and a cam 37 on which the cam follower 36 slides. The transfer beam 4 is reciprocated in the direction of the arrow X by rotating in response to the drive rotation of. That is, when the cam 37 rotates in one direction as indicated by the arrow X1, the cam follower 36 swings as indicated by the arrow X2, and one end of the bell crank 34 swings as indicated by the arrow X3. Reciprocates in the X direction.

  A cam mechanism 40 for swing motion includes a swing lever 41 splined to the transfer drive rod 3, a connecting rod 44 rotatably connected to the tip of the swing lever 41 via a pin 43, One end of the connecting rod 44 is rotatably connected by a pin 45 and is supported so as to be swingable around a swing shaft 47, a cam follower 48 provided at the other end of the bell crank 46, and a cam follower. 48 is configured by a sliding cam 49, and the cam shaft 82 is rotated in response to the driving rotation from the motor 90, so that the transfer driving rod 3 swings in the direction of arrow R. That is, when the cam 49 rotates in one direction as indicated by the arrow R1, the cam follower 48 swings as indicated by the arrow R2, and one end of the bell crank 47 swings as indicated by the arrow R3. It swings as shown by arrow R4, and the transfer drive rod 3 swings as shown by arrow R by that movement.

Next, the chuck mechanism CH (CH0 to CH3) will be described.
The chuck mechanism CH (CH0 to CH3) is mounted on the transfer beam 4 at a constant interval (an interval equal to the interval of the forging press working parts K1 to K4), and reciprocates between the processes together with the transfer beam 4. Move. Further, as shown in FIG. 2, each chuck mechanism CH is engaged with a drive arm 8 coupled to the transfer drive rod 3, and the drive arm 8 swings integrally with the transfer drive rod 3. Thus, the finger 10 of the chuck mechanism CH is driven to open and close.

  4A and 4B are configuration diagrams of the chuck mechanism CH, in which FIG. 4A is a front view showing a state in which three fingers (work gripping portions) 10 are closed and the work W is gripped, and FIG. It is a front view which shows a state when it opens and the holding | grip of the workpiece | work W is cancelled | released. FIG. 5 is a side view of the chuck mechanism CH, and is a diagram showing a configuration of a mechanism portion that transmits the swinging motion of the transfer drive rod 3 as an opening / closing operation of the chuck mechanism CH.

  The chuck mechanism CH includes a chuck base 20 fixed to the transfer beam 4, and a pair of L-shaped rotations in which the base ends 11a and 12a are rotatably connected to the tip of the chuck base 20 via pins 21. Arms 11, 12, fingers (work gripping portions) 10 for gripping a total of three workpieces W projecting from the tips 11 b, 12 b of the rotating arms 11, 12, and bending of the rotating arms 11, 12 A pair of actuating rods 15 whose ends are pivotally connected to the portions 11c, 12c by pins 13 and actuating bars 14 whose both ends are pivotally connected to the base ends of the pair of actuating rods 15 via pins 16. And a slider 17 that is coupled to the central portion of the operating bar 14 and slides along a guide 18 provided on the chuck base 20. By slid by the movement as indicated by the arrow T1, the operating rod 15 moves as indicated by the arrow T2, and the movement causes the rotating arms 11 and 12 to rotate as indicated by the arrow T3. It closes and opens as shown by arrow T4.

  The transfer apparatus 1 provided with this type of chuck mechanism CH often causes a conveyance trouble due to a slight defect, particularly when a heavy workpiece W is conveyed at high speed. As an example of the conveyance trouble, when the workpiece W is conveyed, when the workpiece W falls in an unstable state or when the workpiece W in the middle of conveyance interferes with a mold or the like, There are cases where the product W is inserted into the next process mold with the direction of the workpiece W changed to cause defective product quality or damage to the mold / parts.

  When a transport trouble occurs, the cause must be investigated and countermeasures must be taken. Conventionally, when a transport trouble occurs, an operator enters the machine and checks each point, and the trouble occurs. The cause of was being investigated. However, in that case, it took a long time to investigate the cause alone, and in many cases, it did not lead to a true cause investigation. In addition, the processing section of the multistage forging press machine is in a harsh environment where a large amount of water, oil, oxide scale, etc. scatters at high temperatures and water vapor drifts, making it difficult to visually check transport problems. there were.

  Therefore, in the transfer apparatus 1 according to the embodiment of the present invention, as shown in FIG. 1, the chuck mechanism displacement sensor 50 that detects the displacement of the movable part when the finger 10 operates is provided on the chuck mechanism CH (CH0 to Ch3). In addition, a moving mechanism displacement sensor 60 for detecting the displacement of the movable part of the moving mechanism is provided in the moving mechanism for reciprocating the chuck mechanism CH. The detection data of the chuck mechanism displacement sensor 50 and the moving mechanism displacement sensor 60 are provided. The detected data is displayed as time-series waveform data on a display unit (such as a personal computer monitor) 110 by a control unit (such as a personal computer) 100 including waveform display means.

  In this case, the chuck mechanism displacement sensor (hereinafter also referred to as “chuck sensor”) 50 is an eddy current displacement sensor, and is fixed to the bracket 22 of the chuck base 20 as shown in FIG. A detection plate 52 that detects the amount of displacement by the chuck mechanism displacement sensor 50 is fixed to an operating rod 15 that drives the fingers 10 to open and close. The operating rod 15 corresponds to a movable part that moves linearly, and the displacement of this part is detected by the chuck mechanism displacement sensor 50 based on the distance from the detection plate 52. That is, the displacement amount corresponding to the opening amount of the finger 10 can be detected by the chuck mechanism displacement sensor 50.

  The moving mechanism displacement sensor 60 (hereinafter also referred to as “transfer sensor”) is a linear absolute coder, and is provided at a position where the displacement amount of the transfer beam 4 that moves linearly can be detected as shown in FIG. Yes.

  In addition, the control unit 100 has a function of displaying, together with the waveform data, a time-series effective range in which the pass / fail determination based on the waveform data detected by the chuck mechanism displacement sensor 50 and the moving mechanism displacement sensor 60 is validated. Also, an upper limit value (which can be finely adjusted) of detection data of the chuck mechanism displacement sensor 50 is set, and when data exceeding the upper limit value is detected, the multi-stage forging press machine M is stopped abnormally (abnormal stop). Means). It also has a function (means) for logging collected waveform data to a storage means such as a hard disk.

  Hereinafter, four measurement examples will be described as Examples 1 to 4.

  FIG. 6 is a waveform diagram of the first embodiment, and shows an example of waveform data in which an abnormal peak occurs in the waveform of the chuck mechanism during conveyance. By observing this waveform data, the following analysis becomes possible. An example of a specific analysis result is given.

  Here, a sudden abnormal peak occurs in the waveform of the chuck sensor of the chuck mechanism CH2 of # 2 (the finger 10 is opened by an external force), and this peak exceeds the upper limit value. Due to the detection, the forging press M stopped abnormally. When confirmed using the waveform data of the transfer sensor, it can be seen that this peak occurrence position is a position that is a distance d before the chuck mechanism CH2 of # 2 completes the conveyance.

  As shown in FIG. 7, the position in front of the distance d until the completion of conveyance is the die 99 of the machining part K3 whose horizontal direction position is # 3 in FIG. 7 of the product (work W) being conveyed in FIG. 7 substantially coincides with the position reaching the horizontal position at the left end. Therefore, the abnormal peak in this case is set because the product (workpiece) is gripped by being shifted to the back side from the predetermined position in the middle of conveyance, or in a state where the die 99 is protruded to the near side from the predetermined position. Therefore, the two fingers 10 on one side (the cutter side of the preparation step S0) of the chuck mechanism CH2 of # 2 are opened by the force Q because of contact with the die 99 of the machining portion K3 of # 3. It can be assumed that it has occurred, and measures to prevent this trouble can be taken quickly.

  Here, if there is no means for analyzing the trouble as described above, it is necessary to go into the aircraft and check each place to find out the cause of the trouble. In many cases, investigating the cause alone takes a long time and does not lead to a true cause investigation. Therefore, by adopting the present invention, the time until the cause is specified can be remarkably shortened, and the operating rate of the forging press machine can be improved. In addition, since a more accurate cause can be estimated, appropriate measures can be taken, which is effective in preventing recurrence.

  FIG. 8 is a waveform diagram of the second embodiment. The amplitude of the waveform immediately after the three chuck mechanisms CH (CH1 to CH3) are closed is an abnormally large value of 4.3 mm with respect to 1.3 mm in the normal state. An example of the waveform data shown is shown. By observing this waveform data, the following analysis becomes possible. An example of a specific analysis result is given.

  In the transfer device 1 of the present embodiment, the opening and closing of the chuck mechanism CH (CH1 to CH3) is driven by the cam mechanism 40. The abnormality of the swing width appears in the waveforms of all chuck sensors. Accordingly, it can be inferred that an abnormal waveform is generated due to partial peeling of the raceway surface of the cam 49 constituting the cam mechanism 40 in the vicinity of the close start portion of the chuck mechanism CH.

  That is, an impact is generated when the cam follower 48 rides on the peeled portion of the cam 49, which is transmitted to the chuck mechanism CH, and the operation rod 15 of the chuck mechanism CH vibrates and the waveform immediately after the chuck mechanism CH is closed. It is probable that the runout became larger than normal. It is desirable that this state can be detected at an early stage because there is a concern about a conveyance trouble. By confirming the waveform of the chuck sensor in this manner, early damage to the cam 49 can be found.

  Therefore, it can be considered effective in terms of maintenance of the chuck mechanism CH. If there is no means for analyzing the trouble as described above, in Example 2, it is difficult to notice this trouble unless a clear abnormality such as a transportation accident appears. By adopting the present invention, it is possible to detect a defect in the transportation system equipment at an early stage, repair the troubled part, and exert an effect in the maintenance of the transportation system equipment.

  FIG. 9 is a waveform diagram of the third embodiment. In this example, when the data detected by the chuck sensor exceeds a preset upper limit value (or lower limit value), it is determined that conveyance mischuck has been detected, and when the forging press M is determined to be mischuck, It is designed to stop abnormally. The upper limit value in this case was examined so as to reliably detect an abnormality and prevent malfunction. Further, as shown in FIG. 10, in the idling operation during normal operation, a waveform peak tends to occur immediately after the chuck mechanism CH is closed due to vibration of the finger 10 of the chuck mechanism CH. The effective range on the line (the effective angle range in the rotation of the cam) is set so that the peak during normal operation is not picked up and is throttled during the transfer that is considered to be the most important, from the start of transfer to the end of transfer. When the conveyance timing is expressed as a crank angle, it is 315 ° to 60 °, but it is set to 310 ° to 60 ° with a margin so as to reliably detect an abnormality.

  Further, the upper limit value of the chuck sensor is quantitatively sufficiently small. By adjusting this upper limit value, the detection sensitivity can be finely adjusted, so that the forging press M can be stopped without overlooking even a slight chuck error.

  According to this embodiment, since the forging press machine M can be stopped without overlooking even a slight chuck mistake, a conveyance trouble can be prevented in advance. In addition, if a transport trouble occurs, the equipment may be damaged, so the transport trouble must be avoided as much as possible. By preventing the above-mentioned conveyance trouble, it is possible to improve the operating rate of the forging press machine M and maintain the equipment.

FIG. 11 is a waveform diagram of the fourth embodiment. In this example, a phenomenon that the workpiece W is not gripped at the timing when the workpiece W should be gripped is detected. Specifically, a lower limit value is set for the moving position of the chuck, and the moving position is set to the lower limit value. Is detected, an abnormality that the workpiece W is not gripped is detected, and the equipment is stopped.
This example is a case in which the workpiece W fell off the die and could not be gripped by the chuck mechanism because the workpiece W did not move well from the punch constituting the machined part immediately after molding.

  Conventionally, in order to detect such a problem, a method has been used in which a detection member is made to collide with the workpiece W remaining on the punch and detected. However, the detection mechanism becomes large and is detected by the impact of the collision. There were problems such as damaging members and other equipment. This embodiment can solve such a problem.

  As described above, the transfer device according to the embodiment of the present invention includes the chuck mechanism displacement sensor (chuck sensor) 50 that detects the displacement of the movable part (the operating rod 15) when the finger 10 of the chuck mechanism CH operates. The moving mechanism displacement sensor (transfer sensor) 60 for detecting the displacement of the movable part (transfer beam 4) of the moving mechanism for moving the chuck mechanism CH and the detection data of both the displacement sensors 50, 60 together in time series. And a control unit 100 that displays the waveform data on the display unit 110. By comparing the displayed current waveform data with the waveform data at the normal time, it is possible to quickly visually determine whether or not there is an abnormality. Can be dealt with. That is, when there is an abnormality in the detected waveform data, the situation and cause of the conveyance trouble can be analyzed from the position and size of the abnormal peak or the shape of the waveform data, and a quick response is possible. For example, it can be pursued based on the waveform data whether the cause of the conveyance trouble is in the material, mold, chuck, or equipment, so it is possible to quickly classify the type of trouble and reduce the analysis time. It can be shortened. In particular, since the displacement sensors 50 and 60 are provided at positions where the displacement of the movable part (the operating rod 15 and the transfer beam 4) that moves linearly is detected, the displacement can be detected with high accuracy by a simple sensor. And the analysis accuracy can be improved.

  Further, since the effective range on the time series in which the pass / fail judgment based on the waveform data is valid is displayed together with the waveform data, during normal operation such as vibration during the idle operation of the finger 10 of the chuck mechanism CH or the operating rod 15. However, it is possible to prevent the amplitude of the waveform that is normally generated from being picked up by mistake as a mischuck.

  Since the forging press machine M is stopped when displacement data exceeding the preset upper limit value is detected, it does not lead to a conveyance trouble with recovery, but a slight waveform fluctuation width If the machine stops abnormally, the cause analysis and countermeasures can be performed promptly. In this case, by finely adjusting the upper limit value, the sensitivity at the time of detecting an abnormality can be finely adjusted. Therefore, the forging press machine M can be stopped without overlooking even a slight chuck error.

  In addition, it is possible to determine an abnormality such as a mischuck in real time while viewing the current waveform data displayed on the display unit 110, and of course, the waveform data is logged (the data is recorded in time series). When an abnormality such as mischuck occurs, the cause of the occurrence can be pursued by analyzing the waveform data retroactively.

  In addition, if the display unit (monitor) that displays the waveform data and the operation unit of the waveform data analysis software are installed near the operation panel of the forging press machine, an abnormal waveform was found from the real-time waveform data. If the forging press stops abnormally due to the case or mischuck detection, the cause analysis can be performed promptly.

  Further, even if a conveyance trouble does not occur, the equipment can be stopped at the discretion of a person when the waveform slightly changes with respect to the normal waveform and a trouble is likely to occur thereafter. Then, the cause analysis and countermeasures can be taken from the abnormal waveform data, and the conveyance trouble can be prevented in advance.

  The present invention is not limited to the above-described embodiments, and modifications, improvements, etc. can be made as appropriate. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, the quality of the operation of the chuck mechanism CH can be automatically determined by comparing the waveform data based on the detection data of the chuck mechanism displacement sensor 50 with a preset waveform data during normal operation (good / bad determination means). . At this time, it is preferable to set in advance a time-series effective range in which the pass / fail determination based on the waveform data is valid, and to make the determination valid only in the effective range. In such a case, it is possible to automatically make a pass / fail judgment based on the detected waveform data, so even if there is no instruction from the administrator, safe operation can be performed by performing automatic stop etc. Can be prevented.

  In addition to the chuck mechanism displacement sensor 50 and the transfer displacement sensor 60, by adding desired sensors such as a load sensor and a temperature sensor, desired waveform data can be displayed on the same time series, thereby improving the cause analysis accuracy. Can be made.

1 Transfer device 3 Transfer drive rod (moving mechanism, movable part)
4 Transfer beam (moving mechanism, movable part)
10 Finger (work gripping part)
50 Chuck mechanism displacement sensor 60 Transfer displacement sensor M Multi-stage forging press W Work S0 to S4 Forging press process K0 to K4 Forging press working part CH, CH0 to CH3 Chuck mechanism 100 Control part (waveform display means, pass / fail judgment means, abnormality Stop means)

Claims (7)

It is provided in a multi-stage forging press machine that processes a workpiece into a predetermined shape by going through a plurality of forging press processes in order, and the workpiece is next processed according to the operation of the forging press processing section provided for each of the forging press processes. A transfer device of a multi-stage forging press machine that sequentially conveys to the process,
A plurality of chuck mechanisms each having a workpiece gripping portion that opens and closes in order to grip or release the workpiece provided corresponding to each of the forging press working portions;
A moving mechanism for reciprocally moving the plurality of chuck mechanisms to sequentially move the workpiece from the previous process to the subsequent process;
A chuck mechanism displacement sensor for detecting the displacement of the movable part when the workpiece gripping portion of the chuck mechanism operates;
Waveform display means for displaying detection data of the chuck mechanism displacement sensor as time-series waveform data;
Equipped with,
The transfer device of a multistage forging press machine, wherein the waveform display means displays a time-series effective range in which pass / fail judgment based on the waveform data is valid together with the waveform data . A moving mechanism displacement sensor for detecting a displacement of a movable part of the moving mechanism for moving the chuck mechanism;
The multistage forging press according to claim 1, wherein the waveform display means displays the detection data of the chuck mechanism displacement sensor and the detection data of the movement mechanism displacement sensor together as time-series waveform data. Machine transfer device.   The transfer device for a multistage forging press according to claim 1 or 2, wherein the displacement sensor is provided at a position for detecting a displacement of a movable part that moves linearly. It is provided with pass / fail judgment means for judging pass / fail of the operation of the chuck mechanism by comparing the waveform data based on the detection data of the chuck mechanism displacement sensor with preset waveform data during normal operation. The transfer device for a multistage forging press according to any one of claims 1 to 3 . Set in advance the effective range of the time series to enable determination of the quality determination unit based on the waveform data, according to claim 4, characterized in that only enable determination of the determination means in the scope A transfer device for a multistage forging press as described in 1. An upper limit value of detection data of the chuck mechanism displacement sensor is set, and an abnormal stop means for abnormally stopping the multistage forging press machine when data exceeding the upper limit value is detected is provided. Item 6. The transfer device for a multistage forging press according to any one of Items 1 to 5 . The transfer device for a multistage forging press according to any one of claims 1 to 6 , further comprising means for logging the waveform data.

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