JP5837950B2 - Bending angle correction system for sheet metal parts - Google Patents

Description

  Embodiments described herein relate generally to a bending angle correction system for a sheet metal part.

  Conventionally, an elevator apparatus as shown in FIG. 7 is known. The elevator apparatus 1 shown here includes a car 3 that can be raised and lowered in a hoistway 2, a counterweight 5 that is connected to the car 3 via a main rope 4, a car 3 that is connected via the main rope 4, and A hoisting machine (elevating drive unit) 6 that elevates and lowers the counterweight 5. The main rope 4 is wound around a traction sheave 7 connected to a hoisting machine 6. In such a configuration, when the hoisting machine 6 rotates and drives the traction sheave 7, the main rope 4 is wound up, the car 3 and the counterweight 5 are raised and lowered, and the car 3 is provided in the building. The user can get on and off at any one of the plurality of halls 8 and get on and off.

  In such an elevator apparatus 1, many sheet metal parts formed by bending a plate-like metal member such as a steel plate are used. For example, a three-way frame provided at the entrance / exit of the car 3 or the entrance / exit of the hall 8, a car door provided at the car 3, a hall door provided at the hall 8, and the like are given as representative examples.

  The bending angle of such a sheet metal part is often required to have high accuracy. However, on the other hand, accurate bending may be difficult due to the elastic action (spring back) of the material of the sheet metal part. For this reason, after the bending process of the sheet metal part is completed, the operator individually measures the bending angle of the sheet metal part using a dedicated angle measuring device, and corrects the bending angle as necessary.

JP201126024A

  However, at the time of measurement, the bending angle is measured at a plurality of locations with respect to one bending portion, and it is confirmed whether or not there is bending uniformity (street) in a direction orthogonal to the bending direction. Further, when the measured bending angle is out of a predetermined dimensional tolerance, the operator strikes the bending portion using a tool such as a hammer and corrects the bending angle.

  When the bending angle is corrected in this way, it takes time and labor to measure the bending angle manually. For this reason, much time is spent correcting the bending angle. In addition, since the bending angle is measured and corrected manually as described above, there is a problem that the quality of the angle correction is likely to vary.

  The present invention has been made in consideration of such points, and an object of the present invention is to provide a bending angle correction system for a sheet metal part that can easily and accurately correct the bending angle of the sheet metal part.

  The bending angle correction system for a sheet metal part according to the embodiment is a bending angle correction system for a sheet metal part that corrects the bending angle of the bent portion of the bent sheet metal part. The bending angle correction system includes bending equipment for bending a sheet metal part and imaging means for imaging a bent part of the bent sheet metal part and creating a bent part image. The bending portion image created by the imaging means is subjected to image analysis by the measuring means, and the initial bending angle of the bending portion is measured. The correction angle is determined by the correction angle determination unit based on the angle difference between the initial bending angle of the bent portion measured by the measurement unit and the target angle. A plurality of correction molds capable of correcting the initial bending angle of the sheet metal part by different angles are stored in the correction mold storage facility. When the initial bending angle of the bent part is smaller than the target angle, the correction mold selecting means is a bent part at a correction angle determined by the correction angle determining means among a plurality of correction molds stored in the correction mold storage facility. Select a correction die that can correct the initial bending angle.

  The bending angle correction system for a sheet metal part according to the embodiment is a bending angle correction system for a sheet metal part that corrects the bending angle of the bent portion of the bent sheet metal part. The bending angle correction system includes bending equipment for bending a sheet metal part using a bending die, and imaging means for imaging a bent part of the bent sheet metal part and creating a bent part image. ing. The bending portion image created by the imaging means is image-analyzed by the measuring means, and the initial bending angle of the bending portion is measured. The correction angle is determined by the correction angle determination unit based on the angle difference between the initial bending angle of the bent portion measured by the measurement unit and the target angle. When the initial bending angle of the bending portion is larger than the target angle, the bending processing equipment pushes the bending mold when the initial bending angle of the bending portion is corrected based on the correction angle determined by the correction angle determining means. Increase.

FIG. 1 is a diagram showing an overall configuration of a bending angle correction system for sheet metal parts according to an embodiment of the present invention. FIG. 2 is a schematic view for explaining bending of a sheet metal part in the bending equipment of the bending angle correction system of FIG. 3 is a schematic perspective view showing a correction mold storage facility of the bending angle correction system of FIG. FIG. 4 is a schematic perspective view showing a state where a correction die is attached in the bending equipment of the bending angle correction system of FIG. FIG. 5 is a schematic view for explaining the correction processing of the bending angle of the sheet metal part in the bending processing equipment of FIG. FIG. 6 is a diagram showing a processing flow in the bending angle correction system of FIG. FIG. 7 is a schematic diagram showing the configuration of the elevator apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6. The bending angle correction system for a sheet metal part according to the present embodiment is a system for bending the sheet metal part and correcting the bending angle of the bent portion of the bent sheet metal part. This bending angle correction system can be suitably used for sheet metal parts such as a three-way frame used in an elevator apparatus (see FIG. 7), for example.

  As shown in FIG. 1, the bending angle correction system 20 for a sheet metal part is bent by a bending equipment 21 for bending the sheet metal part 10 and a bending die 15 (see FIG. 2) of the bending equipment 21. An imaging unit 22 that captures an image of the bent portion 11 of the sheet metal part 10 to create a bent portion image, and a management server 23 connected to the imaging unit 22 (for example, by wire) are provided. As shown in FIG. 2, a bending die (punch) 15 is attached to the bending processing equipment 21, and the sheet metal part 10 is held by the die 16, and the bending die 15 pushes the sheet metal part 10. The sheet metal part 10 is bent to form the bent portion 11. The initial bending angle 12 of the formed bent portion 11 can be changed according to the die tip angle of the bending die 15 and the pushing amount of the bending die 15, and can be set to a desired angle.

  As shown in FIG. 1, the imaging unit 22 includes two shape photographing cameras 22 a suitable for imaging the bent portion 11 of the sheet metal part 10. The bent portion 11 of the sheet metal part 10 is imaged by these two shape photographing cameras 22a, and a bent portion image is created. The created bent part image is transmitted to the management server 23.

  The management server 23 performs image analysis on the bending portion image created by the imaging means 22 to measure the initial bending angle 12 of the bending portion 11, and the initial bending angle of the bending portion 11 measured by the measuring means 24. And a correction angle determination means 25 for determining a correction angle for correcting the initial bending angle 12 based on an angle difference between the target angle 12 and the target angle (design angle of the bent portion 11).

  Among these, the measuring unit 24 performs image analysis by recognizing the bent portion image, and measures the initial bending angle 12 of the bent portion 11. A method for measuring the initial bending angle 12 is not particularly limited as long as the initial bending angle 12 of the bent portion 11 can be measured.

  The management server 23 has a correction angle database 26. In this correction angle database 26, a plurality of different correction candidate angles are stored. The stored correction candidate angle corresponds to an angle (an increase or decrease from the initial bending angle 12) that can be corrected by the correction mold 17 stored in the correction mold storage facility 27 described later.

  The correction angle determination means 25 calculates the angle difference between the initial bending angle 12 of the bent portion 11 measured by the measurement means 24 and the target angle, and is stored in the correction angle database 26 based on the calculated angle difference. An appropriate (for example, the closest) correction candidate angle among the plurality of correction candidate angles is determined as a correction angle.

  Then, the initial bending angle 12 of the bent part 11 is corrected according to the determined correction angle. That is, when the initial bending angle 12 of the bent portion 11 is smaller than the target angle (when the correction angle is a positive value), the correction mold 17 is used to perform correction so as to increase the angle from the initial bending angle 12. Is called. On the other hand, when the initial bending angle 12 of the bending portion 11 is larger than the target angle (when the correction angle is a negative value), the initial bending angle is increased by increasing the pushing amount of the bending die 15 in the bending equipment 21. Correction that makes the angle smaller than 12 is performed. The above-described correction angle determination means 25 can determine whether the initial bending angle 12 is smaller or larger than the target angle. Hereinafter, a case where the initial bending angle 12 is smaller than the target angle will be described.

  As shown in FIG. 1, the bending angle correction system 20 includes a correction mold storage facility 27 that stores a plurality of correction molds 17 that can correct the initial bending angle of the sheet metal part 10 at different angles, and correction angle determination means. And a correction die attaching means 28 for attaching the correction die 17 corresponding to the correction angle determined by 25 to the bending equipment 21. Among these, as shown in FIG. 3, the plurality of correction dies 17 stored in the correction die storage facility 27 have a thickness (direction orthogonal to the pressing direction, lateral direction shown in FIG. 3 or 5). Are different and are attached to the bending die 15 in the bending equipment 21 in pairs, and are used to correct the initial bending angle 12.

  The management server 23 further includes a correction mold database 30 and a correction mold selection means 29 for selecting an appropriate correction mold 17 from the plurality of correction molds 17 stored in the correction mold database 30. doing. Among these, the correction mold database 30 stores data (identification number, correctable angle, etc.) of the correction mold 17 stored in the correction mold storage facility 27. The correction mold selecting means 29 is a correction angle determining means among the plurality of correction molds 17 stored in the correction mold database 30 (that is, the plurality of correction molds 17 stored in the correction mold storage facility 27). The identification number of the correction mold 17 capable of correcting the initial bending angle 12 of the sheet metal part 10 with the correction angle determined by 25 is selected.

  With this configuration, when the correction angle determination unit 25 determines that the initial bending angle 12 of the bent portion 11 is smaller than the target angle, the correction mold selection unit 29 selects the correction mold 17. The instructions are given. Receiving this instruction, the correction mold selecting means 29 selects the correction mold 17 as described above.

  A correction mold attaching means 28 is connected to the management server 23 (for example, by wire), and the identification number of the correction mold 17 selected by the correction mold selecting means 29 is assigned to the correction mold attaching means 28. Is transmitted.

  The correction mold attachment means 28 takes out the correction mold 17 corresponding to the identification number transmitted from the correction mold selection means 29 from the correction mold storage equipment 27 and attaches it to the bending equipment 21. At this time, as shown in FIGS. 4 and 5, the bending equipment 21 is attached to both sides of a bending die 15 where the bending portion 11 of the sheet metal part 10 is bent. Thereby, the setup for correcting the initial bending angle 12 of the bent portion 11 is completed, and the initial bending angle 12 can be corrected. At this time, as shown in FIG. 5, the correction dies 17 on both sides of the bending die 15 press the sheet metal part 10 to widen the angle of the bent portion 11 to obtain the corrected angle 13 as shown in FIG. 5. It becomes possible. That is, the corrected angle 13 can be adjusted according to the thickness of the correction mold 17.

  The effect | action of this Embodiment which consists of such a structure is demonstrated using FIG.

  First, the sheet metal part 10 is bent in the bending equipment 21 (step S1). In this case, first, a bending die 15 having a die tip angle corresponding to a target angle is mounted in the bending equipment 21 and the sheet metal part 10 before bending is held by the die 16 (see FIG. 2). Subsequently, the bending mold 15 is pressed against the sheet metal part 10 while the sheet metal part 10 is held, and the bending mold 15 is pressed into the sheet metal part 10 by a desired amount. In this way, the sheet metal part 10 is bent, and a bent portion 11 having an initial bending angle 12 is formed.

  Subsequently, the bending portion 11 of the sheet metal part 10 is imaged by the imaging means 22 (step S2). In this case, the bent portion 11 is imaged by the two shape photographing cameras 22a to create a bent portion image. The created bent part image is transmitted to the management server 23.

  Next, the bending part image is image-analyzed by the measuring means 24 of the management server 23, and the initial bending angle 12 of the bending part 11 is measured (step S3).

  Then, the correction angle determination unit 25 determines a correction angle based on the angle difference between the measured initial bending angle 12 and the target angle (step S4). In this case, the correction angle determination unit 25 calculates an angle difference based on the measured initial bending angle 12 and the target angle, and a plurality of corrections stored in the correction angle database 26 based on the calculated angle difference. Of the candidate angles, one correction candidate angle is determined as a correction angle. For example, when the initial bending angle 12 of the bent portion 11 of the sheet metal part 10 bent at a target angle of 90 ° is measured as 89.1 °, + 0.9 ° is calculated as the angle difference. In the correction angle database 26, when correction candidate angles of..., + 0.75 °, + 1.0 °,... Are stored, + 1.0 ° closest to + 0.9 ° is the correction angle. It is determined.

  Subsequently, the correction mold selecting means 29 selects one correction mold 17 from the plurality of correction molds 17 stored in the correction mold storage facility 27 based on the determined correction angle (step S5). ). In this case, the correction mold selecting means 29 is a correction mold 17 capable of correcting the initial bending angle 12 of the sheet metal part 10 with a determined correction angle among a plurality of correction molds stored in the correction mold database 30. Select the identification number. For example, when + 1.0 ° is determined as the correction angle, the angle of the bent portion 11 is set to 1.0 ° by attaching a pair of correction dies 17 to both sides of the bending die 15 in the bending equipment 21. A correction die 17 that can be increased is selected. Then, the identification number of the selected correction mold 17 is transmitted to the correction mold mounting means 28.

  Next, the selected correction die 17 is attached to the bending equipment 21 by the correction die attaching means 28 (step S6). That is, the correction mold attaching means 28 takes out the correction mold 17 corresponding to the identification number transmitted from the correction mold selecting means 29 from the correction mold storage equipment 27 and applies it to the bending mold 15 in the bending equipment 21. Install. The attached correction molds 17 are arranged on both sides of the bending mold 15 (see FIGS. 4 and 5). This completes the setup for correcting the initial bending angle 12 of the bent portion 11.

  Thereafter, the bending portion 11 of the sheet metal part 10 is corrected and bent (reprocessed) in the bending equipment 21 (step S7). As a result, the bent portion 11 is bent so that the angle is expanded from the initial bend angle 12 of the bent portion 11, and the initial bend angle 12 is corrected. The angle of the bent portion 11 is changed to the corrected angle 13 as shown in FIG. can do. As a result, the bending angle of the bent portion 11 can be brought close to the target angle.

  After the correction bending process of the bent portion 11 is performed, the bending angle of the bent portion 11 is measured again by performing the procedure from step S2 described above, and whether or not the target angle is reached (the dimensional tolerance). Whether it is within range). When the target angle is reached, the bending process of the bent portion 11 is finished. When the target angle is not reached, the correction is preferably performed again.

  Note that the next sheet metal part 10 may be bent while the correction die 17 selected as described above is attached to the bending equipment 21. This is preferably applied when bending the sheet metal part 10 formed of the same lot material (for example, a sheet wound around the same roll) as the material forming the previous sheet metal part 10. is there. In this case, the accuracy of the sheet metal part 10 can be improved while omitting the measurement and correction of the initial bending angle 12 of the sheet metal part 10 thereafter, and the bending process can be shortened and the quality can be improved. Further, in this case, considering the material conditions such as the ease of bending of the material of the lot, the subsequent bending of the sheet metal part 10 of the same lot can be performed, and the accuracy of the bending can be improved. When the material lot changes, the correction mold 17 is removed from the bending equipment 21 by the correction mold attaching means 28 and stored in the correction mold storage equipment 27, and is bent according to the procedure from step S1 described above. It is preferred that processing and correction be performed.

  As described above, according to the present embodiment, the bending portion image obtained by imaging the bending portion 11 of the bent sheet metal part 10 is subjected to image analysis, and the initial bending angle 12 of the bending portion 11 is measured. Based on the angle difference between the initial bending angle 12 and the target angle, a correction angle for correcting the initial bending angle 12 can be determined. As a result, the correction angle can be determined by automatically measuring the initial bending angle 12 rather than manually. Therefore, the measurement and correction of the initial bending angle 12 can be easily performed, and the quality of correction of the initial bending angle 12 can be improved. That is, it is possible to easily and accurately correct the initial bending angle 12 of the sheet metal part 10. Furthermore, according to the present embodiment, the initial bending angle 12 can be corrected in consideration of the manufacturing error of the initial bending angle 12 caused by the bending processing equipment 21 itself, and the accuracy of the sheet metal part 10 is improved. Is possible.

  Further, according to the present embodiment, the correction die 17 is selected based on the determined correction angle, and the selected correction die 17 is taken out from the correction die storage facility 27 and is added to the bending processing facility 21. It is attached. Accordingly, the correction mold 17 can be automatically attached to the bending equipment 21 instead of manual work, and setup for correcting the initial bending angle 12 can be performed. For this reason, it is possible to easily correct the initial bending angle 12 of the sheet metal part 10.

  Furthermore, according to the present embodiment, the correction angle for correcting the initial bending angle 12 is determined from one correction candidate angle among a plurality of correction candidate angles stored in the correction angle database 26. Accordingly, the correction angle that can be corrected by the correction mold 17 stored in the correction mold storage facility 27 can be appropriately determined, and the correction mold 17 can be selected smoothly and stored. It can suppress that the kind of power correction metal mold | die 17 increases.

  In the above-described embodiment, the case where the initial bending angle 12 of the bent portion 11 is smaller than the target angle has been described. Therefore, the case where the initial bending angle 12 of the bent portion 11 is larger than the target angle will be described below. In this case, as described above, the initial bending angle 12 can be corrected by increasing the pushing amount of the bending mold 15 in the bending equipment 21.

  More specifically, when the correction angle determination means 25 determines that the initial bending angle 12 of the bending portion 11 is larger than the target angle, the correction angle determination means 25 increases the pushing amount of the bending mold 15 to the bending processing equipment 21 and performs the bending processing. Give instructions to do so. Upon receiving this instruction, the bending equipment 21 increases the pushing amount of the bending die 15 based on the correction angle determined by the correction angle determination means 25. That is, adjustment is performed so that the push amount increases as the correction angle that becomes a negative value decreases (the absolute value of the correction angle increases). As a result, when the bending equipment 21 performs a bending process (reworking) for correcting the initial bending angle 12 of the bending portion 11, the pushing amount of the bending mold 15 against the sheet metal part 10 is the same as the previous bending. It is larger than that during processing (step S1). As a result, the bent portion 11 is bent so that the angle is smaller than the initial bend angle 12, the initial bend angle 12 is corrected, and the bend angle of the bend portion 11 can be made closer to the target angle.

  Further, the pressing amount of the bending die 15 adjusted as described above may be applied at the time of bending the next sheet metal part 10. This is preferably applied when bending the sheet metal part 10 formed of the same material as the material forming the previous sheet metal part 10. In this case, the accuracy of the sheet metal part 10 can be improved while omitting the measurement and correction of the initial bending angle 12 of the sheet metal part 10 thereafter, and the bending process can be shortened and the quality can be improved. Further, in this case, considering the material conditions such as the ease of bending of the material of the lot, the subsequent bending of the sheet metal part 10 of the same lot can be performed, and the accuracy of the bending can be improved. In addition, when the lot of material changes, it is preferable to return the pushing amount of the bending die 15 to a value before adjustment and perform bending of the sheet metal part 10.

  When the initial bending angle 12 of the bent portion 11 is larger than the target angle, the correction angle determination unit 25 does not select the correction candidate angle stored in the correction angle database 26 and the bending portion 11 measured by the measuring unit 24 is selected. The angle difference itself between the initial bending angle 12 and the target angle may be determined as the correction angle. In this case, it is possible to finely determine the correction angle and finely determine the pushing amount of the bending mold 15, and the bending angle of the bending portion 11 can be made closer to the target angle.

  As described above, the embodiment of the present invention has been described in detail. However, the bending angle correction system for sheet metal parts according to the present invention is not limited to the above-described embodiment, and does not depart from the spirit of the present invention. Various changes are possible.

DESCRIPTION OF SYMBOLS 10 Sheet metal part 11 Bending part 12 Initial bending angle 15 Bending die 17 Correction die 20 Bending angle correction system 21 Bending processing equipment 22 Imaging means 24 Measuring means 25 Correction angle determination means 26 Correction angle database 27 Correction mold storage equipment 28 Correction Mold attachment means 29 Correction mold selection means

Claims (3)

A bending angle correction system for a sheet metal part for correcting a bending angle of a bent portion of a bent sheet metal part,
Bending equipment for bending the sheet metal parts;
Imaging means for imaging the bent portion of the bent sheet metal part to create a bent portion image;
Measuring means for measuring an initial bending angle of the bent portion by performing image analysis on the bent portion image created by the imaging means;
Correction angle determining means for determining a correction angle based on an angle difference between the initial bending angle and a target angle of the bent portion measured by the measuring means;
A correction mold storage facility for storing a plurality of correction molds capable of correcting the initial bending angle of the sheet metal part at mutually different angles;
When the initial bending angle of the bent portion is smaller than the target angle, the bending is performed at the correction angle determined by the correction angle determination unit among the plurality of correction molds stored in the correction mold storage facility. A bending angle correction system comprising: a correction mold selecting means for selecting the correction mold capable of correcting the initial bending angle of a portion.   The correction mold attaching means for taking out the correction mold selected by the correction mold selecting means from the correction mold storage equipment and attaching the correction mold to the bending processing equipment is further provided. Bending angle correction system. A correction angle database in which a plurality of correction candidate angles are stored as angles that can be corrected by the plurality of correction molds stored in the correction mold storage facility;
The correction angle determination means determines, based on the angle difference, one of the plurality of correction candidate angles stored in the correction angle database as the correction angle. The bending angle correction system according to 1 or 2.

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