JP6503969B2 - Determination method of metal work - Google Patents

Description

  The present invention relates to a method of determining a metal work, and more specifically, a through hole for inserting a connector member is formed to have a rising in a metal work body, and the position of the through hole with respect to the metal work body The present invention relates to a method of determining a metal work that determines the presence or absence of a shift.

  Conventionally, an inverter or converter such as a hybrid vehicle is mounted on a vehicle body in a state of being incorporated in a metal case having an opening (a metal case having conductivity). The opening is closed by a metal cover (a metal cover having conductivity) assembled to the metal case via a plurality of bolts. Here, with reference to FIGS. 9-15, the press-forming process which shape | molds this metal-made cover by the press by several presses is demonstrated. First, as shown in step S1, a step of preparing a metal flat plate to be a material M of the metal cover is performed (see FIGS. 9 and 10).

  Next, as shown in step S2, the material M is pressed and punched so that the outline of the metal cover is formed (see FIG. 9). Thereby, the first work W1 is formed (see FIG. 11). Next, as shown in step S3, a part of the edge of the flange 12 formed in the first work W1 is cut to form the bolt mounting hole 14 and to insert a connector member (not shown). A step of forming the through holes 16 is performed (see FIG. 9). Thereby, the second work W2 is formed (see FIG. 12). As described above, the bolt mounting hole 14 is a hole for inserting a bolt when the metal case is closed by the metal cover.

  Next, as shown in step S4, a step of removing burrs (not shown) formed at the edge of the bolt attachment hole 14 formed in step S3 is performed (see FIG. 9). Thereby, the third work W3 is formed (see FIG. 13). Next, as shown in step S5, part of the flange 12 of the third work W3 is bent, and further, the bolt mounting hole 14 is formed, and the edge of the through hole 16 formed in step S3 is raised (burring Process (refer to FIG. 9). Thus, the fourth work W4 is formed (see FIG. 14). Finally, as shown in step S6, a step of removing burrs (not shown) formed at the edge of the bolt attachment hole 14 formed in step S5 is performed (see FIG. 9). Through such a press forming process, the metal cover 10 is completed (see FIG. 15).

  The finished metal cover 10 is subjected to the masking disclosed in Patent Document 1 and subjected to electrodeposition coating. Then, when the metal cover 10 on which the electrodeposition coating has been performed is attached to the metal case, the masking portion (conductive portion) of the metal cover 10 and the metal case are electrically conducted. Therefore, the metal cover 10 can be grounded to the metal case while shielding noise generated from the inverter and the converter.

JP, 2010-247011, A

  However, in the technique described above, the raising (burring) of the edge of the through hole 16 performed in step S5 is performed by press forming. Therefore, in the formed fourth work W4, the through hole 16 may be displaced with respect to the fourth work W4 main body. That is, in some cases, the formed fourth work W4 is a defective product. Therefore, a defective product may be sent to the next step, step S6, and as a result, a defect may occur in the finished product (in this case, the metal cover 10).

  The present invention is intended to solve such a problem, and an object thereof is to form a through hole in which a burring process is applied to a metal work body by pressing. It is providing the determination method of the metal workpiece which can determine the presence or absence of position shift.

The present invention is for achieving the above-mentioned object, and is configured as follows.
In the invention according to claim 1, the through hole for inserting the connector member is formed to have a rising in the metal work body, and the presence or absence of the positional deviation of the through hole with respect to the metal work body is determined It is a judgment method of metal work . In this determination method, a step of preparing an inspection jig having a mounting surface on which the metal work body can be mounted, and a step of setting the metal work body on the mounting surface of the inspection jig after the preparation step And a step of determining, after the setting step, at least three places whether or not the metal work main body is placed on the mounting surface of the inspection jig.

  According to the first aspect of the present invention, when it is determined in this determination that all three places are placed, it can be determined that the metal workpiece is placed on the placement surface of the inspection jig without distortion. Therefore, it can be determined that positional deviation of the through hole does not occur with respect to the metal work main body. On the other hand, if it is determined in this determination that even one place is not placed, a state in which the metal work is distorted on the placement face of the inspection jig (for example, the metal work floats on the placement face) State) can be determined. Therefore, it can be determined that positional deviation of the through hole occurs with respect to the metal work main body.

  The invention according to claim 2 is the method for judging a metal work according to claim 1, wherein the judgment of the mounting of the metal work body on the mounting surface of the inspection jig is performed by the inspection jig. It is performed by determining the presence or absence of conduction between the mounting surface and the metal work body.

  According to the second aspect of the invention, the function and effect of the first aspect can be obtained with a simple structure.

It is a flow explaining the press molding process of the metal covers concerning an example. It is a perspective view of the inspection jig used at the process of step S5 A of FIG. It is a top view of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a front view of FIG. It is a side view of FIG. It is a perspective view explaining the state which has given the process of step S5 B of FIG. It is a top view of FIG. It is a flow explaining the press molding process of the metal covers concerning a prior art. It is an enlarged view of the raw material before the process of step S1 of FIG. 9 is given. It is a perspective view of the workpiece | work (1st workpiece | work) in which the process of step S1 of FIG. 9 was given. FIG. 10 is a perspective view of a work (second work) on which the process of step S2 of FIG. 9 has been performed. It is a perspective view of the workpiece | work (3rd workpiece | work) in which the process of step S3 of FIG. 9 was given. FIG. 10 is a perspective view of a work (fourth work) on which the process of step S4 of FIG. 9 has been performed. It is a perspective view of the workpiece (fifth workpiece) to which the process of step S5 of FIG. 9 was given.

  Hereinafter, modes for carrying out the present invention will be described with reference to FIGS. As described in the prior art, an inverter or converter such as a hybrid vehicle is mounted on a vehicle body (not shown) in a state of being incorporated in a metal case having an opening (a metal case having conductivity). ing. The opening is closed by a metal cover 10 (a metal cover having conductivity) assembled to the metal case via a plurality of bolts (not shown). The metal is, for example, a conductive metal such as iron.

  As described in the prior art, the metal cover 10 is completed through a press forming step (steps S1 to S5) of forming by a press using a plurality of presses. However, in this embodiment, unlike the prior art in the press forming step, a step of determining the presence or absence of positional deviation of the through hole 16 with respect to the fourth workpiece W4 between step S5 and step S6 ( Hereinafter, the “positional deviation determination step” is included. Therefore, in the following, only this positional deviation determination step will be described. The same members as the members described in the prior art will be denoted by the same reference numerals in the drawings and redundant descriptions will be omitted.

  First, the inspection jig 20 used in this positional deviation determination step will be described. As shown in FIGS. 2 to 6, the inspection jig 20 is composed of a pedestal 22, a fitting projection 24, and six blocks 26. The pedestal 22 is a member formed in a rectangular shape having a mounting surface 22 a on which the fourth workpiece W 4 can be mounted. In the mounting surface 22a, concave holes 22b into which bent portions of the flange 12 to be described later can be inserted are formed at appropriate places.

  In addition, three sensors 28 in the form of electrodes are attached to the mounting surface 22a. The sensor 28 is assembled to the pedestal 22 in a conductive manner with respect to the fourth workpiece W4 placed on the placement surface 22a. A first cable 28a is connected to the sensor 28 (see FIG. 4). On the other hand, a second cable (not shown) is connected to the fourth work W4 placed on the mounting surface 22a of the pedestal 22.

  Therefore, the presence or absence of conduction between the sensor 28 and the fourth work W4 can be determined by an electric circuit (not shown) connected to the both cables 28a. Further, a guide pin 30 which can be inserted into a bolt mounting hole 14 formed in the fourth work W4 is attached to the mounting surface 22a. In this example, ten bolt mounting holes 14 are formed, so ten guide pins 30 are also assembled. The tip of the guide pin 30 is formed to be tapered. Therefore, the guide pin 30 can be easily inserted into the bolt mounting hole 14.

  Further, the fitting projection 24 is a member assembled in a projecting manner on the mounting surface 22 a of the pedestal 22 so as to be able to be fitted into the through hole 16 formed in the fourth work W4. Further, the six blocks 26 can restrict the edge of the flange 12 of the fourth work W 4 placed on the mounting surface 22 a of the pedestal 22 in a state where the fitting projection 24 is fitted in the through hole 16. It is a member assembled | attached to the mounting surface 22a.

  Note that tapers 26 a are respectively formed inside the tips of the six blocks 26. As a result, it is possible to perform the guiding function when the fourth work W4 is placed on the mounting surface 22a of the pedestal 22. The inspection jig 20 is composed of the pedestal 22, the fitting projection 24, and the six blocks 26.

  Next, with reference to FIGS. 1, 7 and 8, the positional deviation determination step using the inspection jig 20 described above will be described. As apparent from FIG. 1, this positional deviation determination step is composed of three steps (step S5A, step S5B, and step S5C) in which the gap between step S5 and step S6 is made. The process of step S5A is a process of preparing the inspection jig 20 described above.

  In addition, the process of step S5B is a process of placing (setting) the fourth work W4 main body on the placement surface 22a of the inspection jig 20 after the process of step S5A. When mounted in this manner, the fitting projection 24 of the inspection jig 20 is inserted into the through hole 16 formed in the fourth work W4, and the six blocks 26 of the inspection jig 20 are The edge of the flange 12 of the fourth workpiece W4 is to be regulated (see FIGS. 7 and 8). At this time, the guide pins 30 of the pedestal 22 of the inspection jig 20 are inserted into the bolt mounting holes 14 formed in the fourth work W4.

  Further, the process of step S5C is a process of determining the presence or absence of conduction between the sensor 28 and the fourth work W4 after the process of step S5B. In addition, this determination is implemented by the sensor 28 of three places, respectively. If it is determined that conduction is present at all three locations in this determination, it can be determined that the fourth workpiece W4 is placed on the placement surface 22a of the inspection jig 20 without distortion. Therefore, it can be determined that positional deviation of the through hole 16 and / or the bolt mounting hole 14 does not occur with respect to the fourth work W4 main body.

  On the other hand, if it is determined in this determination that conduction is not present even in one place, the fourth work W4 is distorted (for example, the flange 12 of the fourth work W4) in the placement surface 22a of the inspection jig 20. The fourth work W4 is placed on the mounting surface by the fact that the edge interferes with the block 26, and / or the edge of the bolt mounting hole 14 of the fourth work W4 interferes with the guide pin 30. 22a can be determined to be in a floating state). Therefore, it can be determined that positional deviation of the through hole 16 and / or the bolt mounting hole 14 has occurred with respect to the fourth work W4 main body.

  If it can be determined that the positional deviation has occurred as described above, the sending of the fourth work W4 to the step S6 can be stopped. Therefore, it is possible to prevent the defective product from being sent to the next step, step S6, and as a result, it is possible to prevent a defect from occurring in the finished product (in this case, the metal cover 10). Of course, if it can be determined that the positional deviation has occurred as described above, it is needless to say that, in the following, the press machine (not shown) is adjusted or the like so as not to cause the positional deviation.

  The above-described content relates to only one embodiment of the present invention, and does not mean that the present invention is limited to the above-described content.

  In the embodiment, an embodiment has been described in which the presence or absence of conduction is determined at three locations. However, the present invention is not limited to this, and any form may be used as long as there are at least three places.

  Further, in the embodiment, the determination of the placement of the fourth workpiece W4 on the placement surface 22a of the inspection jig 20 is the determination of the presence or absence of conduction between the placement surface 22a of the inspection jig 20 and the fourth workpiece W4. Explained the form performed by. However, the present invention is not limited to this, and determination may be made using various sensors (for example, a proximity switch, proximity sensor, photoelectric sensor, LS sensor, LS switch, etc.).

  Further, in the embodiment, the edge of the flange 12 of the fourth work W4 interferes with the block 26, and / or the edge of the bolt mounting hole 14 of the fourth work W4 interferes with the guide pin 30. An embodiment has been described in which it is possible to determine that the fourth work W4 is placed in a floating state with respect to the mounting surface 22a by having been set. However, the present invention is not limited to this, and it may be determined only by any one of these interferences.

  Moreover, it goes without saying that there is a predetermined design gap between the through hole 16 of the metal cover 10 and the fitting projection 24 of the inspection jig 20. The same applies between the flange 12 of the metal cover 10 and the block 26 of the inspection jig 20 and between the edge of the bolt mounting hole 14 of the metal cover 10 and the guide pin 30 of the inspection jig 20. .

10 Metal cover (work)
16 through hole 20 inspection jig 22a mounting surface

Claims (2)

A through hole for inserting a connector member is formed on a metallic work body so as to have a rising edge, and the method of determining a metallic work is to determine the presence or absence of positional deviation of the through hole with respect to the metallic work body. ,
Preparing an inspection jig having a mounting surface on which the metal work body can be mounted;
After the preparation step, a step of setting the metal work body on the mounting surface of the inspection jig;
A determination method of a metal work including: a step of determining at least three places whether or not a metal work main body is mounted on a mounting surface of an inspection jig after the setting step. The method of determining a metal work according to claim 1, wherein
The determination method of the metal workpiece | work with respect to the mounting surface of a test | inspection jig is the determination method of metal workpiece | work performed by the determination of the presence or absence of conduction with the mounting surface of a test | inspection jig, and a metal workpiece main body.

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