JP3096751U - Former drilling monitoring device - Google Patents

Abstract

(57) [Problem] To provide a former drilling monitoring device capable of detecting an abnormality peculiar to drilling in a drilling process. A punch 12 and a die 7, and a punch 1 for forming a molded product having a through hole by punching.
2 acts on the stripper plate 21 of the former 1 having the stripper plate 21 which comes into contact with the above-mentioned molded product at the time of retreat and removes the molded product from the punch 12 and acts on the plate 21 when the above-mentioned molded product comes into contact with the plate 21 A piezo element sensor 22 for measuring a stress to be applied is provided. The stress value output from the piezo element sensor 22 is
The stress value discriminator 24 connected to 2 is configured to compare with the stress value at normal time, and when this stress value deviates from the stress value at normal time, an abnormal signal is output from the stress value discriminator 24,
Former 1 is stopped or an abnormality is reported.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is a punching punch and die for punching to form a molded product having a through hole. , And a through hole that allows the punching punch to be inserted, and when the punching punch retracts Equipped with a stripper plate that comes into contact with the molded product and removes the molded product from the punch punch The present invention relates to a punching monitoring device for a former.

[0002]

[Prior art]

  Conventionally, in a multi-stage former, it is possible to detect the quality and abnormality of the molded product to be forged. For example, a spacer rod mounted coaxially on the rear end of the punch is used as a means for Attach a strain sensor that measures the tonnage forging from the strain force of the spacer rod in From the measured tonnage, the quality of the forged product and the punch fatigue and damage Or, the presence or absence of molded products is detected, and if there is an abnormality, the former is immediately stopped. It is known that a safety device that can be used is provided (for example, see Patent Document 1).

[0003]

[Patent Document 1]           JP-A-56-1238 (page 1, FIG. 2)

[0004]

[Problems to be solved by the device]

  By the way, according to the safety device of the former described above, the spacer lock is Anomalies are detected by measuring the tonnage forging with a strain sensor from the strain force generated in the Therefore, it is possible to detect abnormalities during forging, but punching It was not possible to detect abnormalities peculiar to the punching process. In other words, after the punching process is completed, the molded product does not follow the punch and is transferred. When the product is carried back to the previous process by the fingers of It was not possible to detect abnormalities peculiar to punching, such as when it was broken.

[0005]   Therefore, the present invention is capable of detecting an abnormality peculiar to the punching process in the punching process. It is an object to provide a hole punching monitoring device for a homer.

[0006]

[Means for Solving the Problems]

  In order to solve the above-mentioned problems, the invention according to claim 1 of the present application provides a punching process. Hole punch and die to form a molded product with through holes, and insert punch hole punch. Has a through hole that allows passage, and punches by abutting the above-mentioned molded product when the punching punch retracts. Monitoring punching of formers with a stripper plate that removes the part from the punch A device for stripping a stripper plate when the molded article is abutted on the plate. A piezo element sensor that measures the stress acting on the tripper plate is installed. The stress value output from the piezo element sensor is connected to the piezo element sensor. The stress value discriminator is configured to compare with the normal stress value. When the stress value deviates, the stress value discriminator outputs an abnormal signal to stop the former. It is characterized in that stop or abnormality is notified.

[0007]   The invention according to claim 2 of the present application provides a molded product having a through hole by punching. It has a hole punch and die to be formed, and a through hole that allows the hole punch to be inserted. When retracting the punching punch, remove the molded product from the punching punch by contacting the molded product. A puncher monitoring device for a former equipped with a tripper plate, which is a stripper -Acts on the stripper plate when the above-mentioned molded product contacts the plate. A strain gauge that measures the stress to be generated is output from this strain gauge. The stress value is the normal stress value by the stress value discriminator connected to the strain gauge. Configured for comparison, if the stress value deviates from the normal stress value, the stress value discriminator It outputs an abnormal signal from the former to stop the former or notify the abnormality. Characterized by

[0008]   Further, the invention according to claim 3 of the present application is the configuration according to claim 1 or claim 2. In addition, the stress value output from the piezo element sensor or strain gauge is displayed. Equipped with an indicator that detects the cause of abnormality based on the change in the stress value displayed on this indicator. However, it is characterized in that an abnormal state is notified.

[0009]

[Embodiment of device]

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.   FIG. 1 shows a hot former provided with a punching monitoring device according to the present invention. This hot The former 1 is provided with a die block 3 at a predetermined position on the machine base 2. While a plurality of dies 4 to 7 are arranged on the rack 3 at regular intervals, the dies 4 The same number of punches 9-12 as the dies 4-7 are provided on the front surface of the moving ram 8 which moves back and forth toward Are arranged so as to face each other, and a plurality of stages are formed by these dies 4 to 7 and punches 9 to 12. The forging stations S1 to S4 are configured.

[0010]   In addition, as shown in FIG. 2, the die block 3 was cut into a predetermined size on the front surface side. Fingers for sequentially transferring the blank B to each forging station S1 to S4 A transfer (material transfer device) having 13 to 16 is provided. That is , Blank B or the molded product in each die, and pusher (not shown) and each die It is pushed out by the knockout pins 17, 18 and 19 provided on the Die of the forging station on the rear side by gripping with the fingers 13 to 16 of the fur It is designed to be sequentially transferred to the front of the.

[0011]   By the finger 13 of the transfer, Upsetting the cutting blank B that has been gripped and transferred to the first-stage forging station S1 A die 4 and a punch 9 which are machined to form a cylindrical primary molded product B1 are provided. It

[0012]   The transfer finger 14 is used for the second forging station S2. The primary molded product B1 that has been gripped and transferred to the second-stage forging station S2 is forged. A die 5 and a punch 10 which are processed to form a flat columnar secondary molded product B2 are provided. ing.

[0013]   By the transfer finger 15 to the third forging station S3, The second molded product B2 that has been gripped and transferred to the third-stage forging station S3 is forged. Die 6 and punch for working to form a bottomed cylindrical tertiary molded product B3 having a recess in the center And 11 are provided.

[0014]   At the final stage forging station S4, transfer fingers 16 are used. Hole punching of the third molded product B3 that is gripped and transferred to the final stage forging station S4 The die 7 and the punching punch 12 which are processed to form the final molded product A having the through hole A1 On the other hand, an insert that allows the punching punch 12 to be inserted into the machine base 2 or the die block 3 is provided. The final molded product A having through holes 21a and punched when the punching punch 12 retracts is panned. A stripper plate 21 is provided for removing from the chi. Also a stripper -The final molded product A removed by the plate 21 drops into the product chute (not shown). Then, it is adapted to be appropriately conveyed to the accommodation section.

[0015]   In the hot former 1 described above, the stripper plate 21 is The stress that acts on the stripper plate 21 when the molded article A comes into contact with the plate While the piezo element sensor 22 for measuring (impact) is provided, the piezo element sensor The lead wire 23 of the sir 22 is a stress value discriminator 24 outside the machine and an indicator for displaying the stress value. 25 is connected to the monitoring device body 26. In this way, the piezo element sensor 2 2, a stress value discriminator 24, an indicator 25, and a monitoring device main body 26. 27 is placed in the former 1. The punching monitoring device 27 is used for the piezo element sensor 2 The stress value output from 2 should be compared with the stress value under normal conditions by the stress value discriminator 24. If this stress value deviates from the normal stress value, the former 1 is stopped. On the other hand, the display 25 displays the stress value. In other words When the force value is higher or lower than the normal stress value range, the stress value discriminator 24 Outputs an abnormal signal from the former and stops the former 1 while displaying the stress value on the display 25. indicate. Further, while managing the change in the stress value measured by the display 25, The cause of the abnormality is judged based on the change in the stress value of the It is designed to emit a light or an alarm sound to notify.

[0016]   Next, the operation of the punching monitoring device configured as described above will be described.   First, as shown in (a) of FIG. 4, forging processing is performed at the third forging station S3. The bottomed cylindrical tertiary molded product B3 is held by the fingers 16 of the transfer. Then, it is transferred to the front surface of the die 7 of the final stage forging station S4. Next, FIG. As shown in (b) of FIG. 3, the punching punch 12 is provided in the insertion hole 2 of the stripper plate 21. It moves forward to the die 7 side through 1a and punches out the center bottom of the tertiary molded product B3. The final molded product A is formed. After that, as shown in (c) of FIG. The punching punch 12 pulls out the final molded product A from the fingers 16 by the backward movement. At the same time, the final molded product A is brought into contact with the stripper plate 21 to punch the punch 1 2. Remove the final molded product A, and drop it into the product chute (not shown). , And appropriately convey it to the accommodation section.

[0017]   Here, the piezo element sensor 22 is the final molded product on the stripper plate 21. The stress is measured from the impact (vibration) generated when the A contacts. And the sensor 22 A stress value discriminator 24 compares the stress value output from When the stress value is within the normal stress value range, the stress value discriminator 24 outputs an abnormal signal. The former 1 continues to be driven as normal operation without force.

[0018]   On the other hand, for example, as shown in (a), (b) and (c) of FIG. When the forged tertiary molded product B3 is transferred by the finger 16 of the transfer, If it falls off the finger 16, it will not be punched and the stripper The final molded product A does not come into contact with the rate 21 either. Therefore, the piezo element sensor 2 The stress value due to the impact is output from 0 as 0, which causes the stress value discriminator 24 to When the stress value from the piezo element sensor 22 is normal when compared with the normal stress value That is, the stress value range is greatly deviated. As a result, from the stress value discriminator 24 An abnormal signal is output and the former 1 is stopped while the response displayed on the display panel 25 It can be determined from the force value that an error due to a transfer error has occurred.

[0019]   In addition, as shown in (a) and (b) of FIG. Pulling out the final molded product A from the transfer finger 16 when moving backward The finger 16 moves the final molded product A to the third-stage forging station S3. There is no contact of the final molded product A to the stripper plate 21 even when it is brought back. Become. Therefore, as in the case described above, the impact from the piezo element sensor 22 The stress value is output as 0, which allows the stress value discriminator 25 to perform normal stress. When comparing with the value, the stress value from the piezo element sensor 22 indicates the range of normal stress value. It will be a big departure. As a result, an abnormal signal is output from the stress value discriminator 24. Output and stop the former 1. In addition, from the stress value displayed on the display 25 It is possible to determine that the error is due to a transfer error. Where The cause of such a state is that the punching punch 12 is worn or transferred. -It is possible that the gripping force of the fingers 16 is too strong, but the cause is the punch 12 If it is worn, the change in the stress value measured up to this state is monitored by the monitoring device body 26. The degree of wear of the punch 12 can be known by managing with.

[0020]   Further, as shown in (a), (b) and (c) of FIG. If the tertiary molded product that has been exposed is tilted, punch holes as shown in Fig. 6 (b). The through hole formed by the punch 12 is also punched in an inclined state. In such a state As shown in FIG. 6C, when the final molded product A is brought into contact with the stripper plate 21, When it comes off from the punching punch 12, the punching pan is used even if punching is performed. Bending stress is applied to the chip 12, and therefore the stripper plate 21 Also a large stress occurs. This allows a large response from the piezo element sensor 22. When the force value is output and compared with the normal stress value by the stress discriminator 24, the piezo element The stress value from the sensor 22 will deviate from the normal stress value range. . As a result, an abnormal signal is output from the stress value discriminator 24 and the former 1 is stopped. It In addition, it is determined from the large stress value displayed on the display unit 25 that the punching is abnormal. You can

[0021]   In the above embodiment, the stripper plate is formed by the piezo element sensor 22. I tried to measure the stress generated in 21, but other strain gauges (Fig. Even if the stress is measured from the strain generated in the stripper plate 21 by (not shown) Good. In that case, as in the case of the piezo element sensor 22, the strain gauge Drilling is performed due to the deviation of the stress value output based on strain from the normal stress value. Abnormality can be detected, and the abnormality can be detected by managing the above stress value. Is abnormal due to gripping error of transfer peculiar to punching process in punching process In the case of, or an abnormality caused by carrying back the transfer, or the punching angle It is possible to determine whether the abnormality is due to the inclination.

[0022]   In addition, in the strain gauge, stress is generated from the strain of the stripper plate 21. Due to the nature of measuring, near the point where the maximum impact (strain) of the stripper plate 21 occurs It is necessary to attach it to the While the strain gauge has poor durability, the piezo element sensor 22 Due to the nature of measuring stress values from shock vibration, avoid locations where distortion is most likely to occur, and Since it can be installed via a bracket etc., it has good durability, and in addition, It is possible to accurately detect wear and breakage of the punch punch 12.

[0023]   Further, in the above embodiment, the punching monitoring device is applied to the hot former. However, it is not limited to hot.

[0024]

[Effect of device]

  As described above, according to the present invention, the stripper plate is mounted on the plate. A piezo element sensor or a sensor for measuring the stress acting on the plate when the molded product is in contact. Is equipped with a strain gauge and output from the piezo element sensor or the strain gauge. The stress value that is connected to the piezo element sensor or strain gauge It is configured to compare with the stress value under normal conditions, and this stress value deviates from the stress value under normal conditions. When it comes out, an abnormal signal is output from the stress value discriminator to stop the former or Since it has been notified, it is output from the piezo element sensor or strain gauge. Due to the deviation of the stress value from the normal stress value, peculiar to the punching process in the punching process Can detect abnormalities. In addition, by managing the stress value above In the case of abnormalities due to gripping error of transfer peculiar to punching in the punching process If it is the case, or if it is an abnormality caused by the transfer back, or the inclination of the punching angle It is possible to determine factors such as whether or not an abnormality is caused by.

[0025]   In addition, if a piezo element sensor is used, the Due to the nature of measuring the stress value, it is possible to avoid the location where the strain is most likely to occur. Therefore, it has better durability than a strain gauge, and in addition, wear of the punch punch and It is preferable because damage or the like can be accurately detected.

[Brief description of drawings]

FIG. 1 is a schematic plan view in which the punching monitoring device of the present invention is applied to a hot former.

FIG. 2 is a vertical cross-sectional plan view of a forging portion of the former.

FIG. 3 is an explanatory diagram of a punching monitoring device.

FIG. 4 is an explanatory diagram of a punching operation in a normal state.

FIG. 5 is an explanatory diagram of a hole punching operation at the time of an abnormality due to a transfer error.

FIG. 6 is an explanatory diagram of a hole punching operation at the time of an abnormality caused by the transfer carrying back.

FIG. 7 is an explanatory diagram of a hole punching operation at the time of abnormality due to the inclination of the hole punching angle.

[Explanation of symbols]

1 Hot Former 7 die 12 punch punch 21 stripper plate 22 Piezo element sensor 24 Stress value discriminator 26 Hole punching monitoring device

Claims (3)

[Scope of utility model registration request] 1. A punching die and a die which are punched to form a molded product having a through hole, and a through hole which allows the punching punch to be inserted therethrough. A punching monitoring device for a former equipped with a stripper plate that abuts and removes a molded product from a punch, which measures the stress acting on the stripper plate when the molded product contacts the stripper plate. An element sensor is provided, and the stress value output from this piezo element sensor is configured to be compared with the normal stress value by the stress value discriminator connected to the piezo element sensor. If the value deviates from the value, the stress discriminator outputs an abnormal signal to stop the former or notify the abnormality. apparatus. 2. A punching die and a die for punching to form a molded product having a through hole, and a through hole allowing the insertion of the punching punch, and the above-mentioned molded product when the punching punch retracts. A punching monitoring device for a former equipped with a stripper plate for contacting and removing a molded product from a punch for punching, wherein the strainer measures the stress acting on the stripper plate when the molded product contacts the stripper plate. A gauge is provided, and the stress value output from this strain gauge is configured to be compared with the stress value under normal conditions by a stress value discriminator connected to the strain gauge. This stress value deviates from the stress value under normal conditions. In this case, a stress hole discriminator outputs an abnormal signal to stop the former or inform the abnormality of the former. 3. A display panel for displaying a stress value output from a piezo element sensor or a strain gauge is provided, and an abnormal cause is detected based on a change in the stress value displayed on the display panel, and an abnormal state is notified. The punching monitoring device for a former according to claim 1 or 2, wherein the punching monitoring device is provided.