JP5462716B2 - Non-ferrous metal structure processing hole plug sealing structure and plug sealing method, non-ferrous metal structure processing hole plug sealing method - Google Patents

Description

  The present invention relates to a plug sealing structure and plug sealing method for sealing a processing hole formed in a non-ferrous metal structure with a plug, and a process control device in the plug sealing method for a non-ferrous metal structure processing hole. .

  Conventionally, in order to seal a hole formed in a metal structure, a plug stopper (plug member) is generally press-fitted into the hole. For example, in Patent Document 1 below, a circumferential groove having a diameter smaller than the inner diameter of the hole is formed on the outer periphery of the body of the plug plug, and the body on the rear side of the circumferential groove in the insertion direction of the plug stopper. It is described that the outer periphery is press-fitted into the hole.

Japanese Patent Laid-Open No. 11-37316

  When sealing a processed hole formed in a non-ferrous metal structure by press-fitting a plug stopper, heat or external force is applied to the non-ferrous metal structure, or changes over time (for example, residual stress generated during molding) In the case where there is a change in the shape of the plug stopper over time, there arises a problem that it is difficult to maintain airtightness or liquid tightness around the plug stopper. In particular, steel plugs made of steel that are cheap and easy to process are generally used for plugging the processing holes of nonferrous metal structures. In this case, the nonferrous metal structure and the steel plug plugs are used. When heat is applied to the non-ferrous metal structure due to the difference in thermal expansion coefficient between the processed hole and the steel plug stopper, a sufficient sealing performance cannot be obtained.

  As described in Patent Document 1, the non-ferrous metal structure in which the processing hole is formed even when the outer diameter of the plug plug is larger than the inner diameter of the processing hole and the plug plug is press-fitted into the processing hole. It is difficult to maintain a sufficient sealing performance under conditions where an object is deformed by heat or the like. In addition, if a circumferential groove is formed on the entire circumference of the plug stopper as described in Patent Document 1, sufficient retaining load resistance cannot be obtained due to the influence of the circumferential groove, and against a pressure change in the non-ferrous metal structure. There may be a problem that it is impossible to maintain the plug stopper from being removed. In particular, there is a concern that the sealing performance of the press-fitted plug stopper will deteriorate under the situation where an external force such as vibration is applied.

  This invention makes it an example of a subject to cope with such a problem. That is, when sealing a processed hole formed in a non-ferrous metal structure with a plug stopper, even if heat or an external force is applied to the non-ferrous metal structure or a change with time occurs, the plug stopper It is possible to maintain airtightness or liquid-tightness around the entire circumference, especially when sealing holes in non-ferrous metal structures with steel plug stoppers under heating conditions or vibration conditions. It is an object of the present invention that sealing performance can be ensured, and that the plug stopper can be kept in the state of being prevented from coming off against pressure changes in the non-ferrous metal structure.

  In order to achieve such an object, the present invention comprises at least the following configuration.

  A plug sealing structure for sealing a processing hole of a non-ferrous metal structure with a plug stopper, and a plug plug press-fitting hole having a diameter larger than the processing hole and concentric with the processing hole is provided in the opening of the processing hole. A step surface between the inner surface of the plug plug press-fitting hole and the inner surface of the processing hole, and the plug plug is fitted to the inner surface of the plug plug press-fitting hole and a top portion continuous to the side surface. Between the inner surface of the plug plug press-fitting hole and the entire corner of the stepped surface and the curved surface of the plug plug press-fitted into the plug plug press-fitting hole. An adhesive reservoir that encloses the adhesive applied to the plug stopper or the plug stopper is formed, and the adhesive reservoir is formed by fitting the side surface of the plug stopper to the inner surface of the plug stopper hole. The first pressure contact portion and the curved surface of the plug plug are pressed against the step surface. Senfutome structure of non-ferrous metal structure working hole, characterized in that it is sealed between the second contact portion which the stepped surface is formed by plastically deforming at Rukoto.

  A plug sealing method for sealing a processing hole of a non-ferrous metal structure with a plug plug, wherein a plug plug press-fitting hole having a diameter larger than the processing hole and concentric with the processing hole is formed at an opening of the processing hole. Thus, a stepped surface forming step for forming a stepped surface between the inner surface of the processing hole and the inner surface of the plug plug press-fitting hole, a side surface fitted to the inner surface of the plug plug press-fitting hole, and a continuous side surface Adhesive application step of applying an adhesive into the plug plug or the plug plug press-fitting hole using a plug plug having a curved surface forming the top, and plug plug press-fitting to press-fit the plug plug into the plug plug press-fitting hole The plug plug press-fitting step includes forming a first press-contact portion by tightly fitting a side surface of the plug plug to an inner surface of the plug plug press-fitting hole, and forming a curved surface of the plug plug with the step. The stepped surface is plastically deformed by being pressed against the surface. A second press-contact portion, and between the entire inner periphery of the plug plug press-fitting hole and the stepped surface, and the curved surface of the plug plug press-fitted into the plug plug press-fitting hole, A plug sealing method for a non-ferrous metal structure processing hole, characterized in that an adhesive pool for sealing the adhesive is formed by sealing at the first pressure contact portion and the second pressure contact portion.

  By having such a feature, the present invention enables the plug even when the non-ferrous metal structure is deformed by heat or the like when sealing the processed hole formed in the non-ferrous metal structure with the plug. Airtightness or liquid tightness can be maintained over the entire circumference of the stopper. In particular, even when the processed hole of the non-ferrous metal structure is sealed with a steel plug stopper, sufficient sealing performance can be ensured under heating conditions. In addition, the plug stopper can be kept from coming off against pressure changes in the non-ferrous metal structure.

It is explanatory drawing which shows the plug sealing structure of the nonferrous metal structure processing hole which concerns on embodiment of this invention (the figure (a) is a whole sectional view, the figure (b) is the A section expansion in the figure (a) Figure). It is explanatory drawing explaining the plug sealing method of the nonferrous metal structure processed hole which concerns on embodiment of this invention. It is explanatory drawing explaining the plug sealing method of the nonferrous metal structure processed hole which concerns on embodiment of this invention. It is explanatory drawing explaining the process control apparatus in the plug sealing method of the nonferrous metal structure processed hole which concerns on embodiment of this invention. It is explanatory drawing explaining the process control apparatus in the plug sealing method of the nonferrous metal structure processed hole which concerns on embodiment of this invention. It is explanatory drawing (cross-sectional shape figure which showed the example of formation of the level | step difference surface in case a plug diameter is 16 mm, and the example of formation of the 2nd press-contact part) which shows the Example of this invention. It is explanatory drawing which shows the Example of this invention (sectional shape figure which showed the example of formation of the level | step difference surface in case a plug diameter is 25 mm, and the example of formation of the 2nd press-contact part). It is explanatory drawing which shows the Example of this invention (detection value diagram which showed the example of the relationship between the press-fit load and press-fit displacement in a plug stopper press-fit process).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a plug sealing structure for a non-ferrous metal structure machining hole according to an embodiment of the present invention (FIG. 1 (a) is an overall sectional view, and FIG. 1 (b) is the same figure (a)). The A section enlarged view in FIG. Generally, the machining hole formed in the non-ferrous metal structure is formed as a fluid flow path or a part passage inside the structure, and the opening is sealed with a plug to seal the flow path or the passage. For example, a flow path that cannot be obtained by molding in an aluminum casting or the like is formed with a processed hole after molding, and the opening is sealed with a plug.

  The plug sealing structure of the non-ferrous metal structure machining hole in the embodiment of the present invention is to seal the machining hole 11 of the non-ferrous metal structure 10 with the plug stopper 20. As a structure on the non-ferrous metal structure 10 side, a plug plug press-fitting hole 12 having a diameter larger than the processing hole 11 and concentric with the processing hole 11 is provided in the opening 11 b of the processing hole 11. And a stepped surface 13 between the processing hole 11 and the inner surface 11a. On the other hand, the plug plug 20 has a side surface 20a that is fitted into the inner surface 12a of the plug plug press-fitting hole 12 and a curved surface 20c that forms a top portion 20b that is continuous with the side surface 20a.

  In the state where the plug plug 20 is press-fitted into the plug plug press-fitting hole 12, the plug plug 20 that is press-fitted into the plug plug press-fitting hole 12 and the entire corner 14 of the inner surface 12 a and the step surface 13 of the plug plug press-fitting hole 12. An adhesive reservoir 31 that encloses the adhesive 30 applied in the plug plug press-fitting hole 12 or the plug plug 20 is formed between the curved surface 20c. The adhesive reservoir 31 presses the first press-contact portion 32 formed by fitting the side surface 20a of the plug plug 20 into the inner surface 12a of the plug plug press-fitting hole 12 and the curved surface 20c of the plug plug 20 to the step surface 13. As a result, the stepped surface 13 is hermetically sealed with the second press-contact portion 33 formed by plastic deformation.

  In the illustrated example, the plug stopper 20 is a so-called saddle-shaped plug, and is a steel plug formed by pressing a steel plate material. The side surface 20a of the plug plug 20 is cylindrical, and its outer diameter is formed larger than the inner diameter of the plug plug press-fitting hole 12 by an interference fit. Further, the top portion 20 b of the plug stopper 20 has a curved surface 20 c, and an arbitrary portion of the curved surface 20 c is pressed against the end portion of the step surface 13.

  In the illustrated example, the adhesive reservoir 31 is a space surrounded by the curved surface 20c of the plug plug 20, the step surface 13 on the non-ferrous metal structure 10 side, and the inner surface 12a of the plug plug press-fitting hole 12, and the adhesive pool 31 is bonded thereto. The agent 30 is encapsulated. In the case where the first press-contact portion 32 and the second press-contact portion 33 have a fine gap, the adhesive 30 is preferably a permeable adhesive that penetrates and cures there, and in addition, a sealed space. It is more preferable to use an anaerobic adhesive (such as an epoxy-based adhesive) that is easily cured.

  The radial width w of the stepped surface 13 is determined by how much the diameter of the plug plug press-fitting hole 12 is made larger than the diameter of the processing hole 11. If the diameter of the plug stopper press-fitting hole 12 is made too large, it will interfere with other structural parts adjacent to the processing hole 11, and if this interference is avoided, an extra space around the processing hole 11 will be required. It is not preferable. In addition, if the radial width w of the stepped surface 13 is too small, the stepped surface 13 is entirely deformed by press-fitting the plug plug 20, and a sufficiently large adhesive reservoir 31 is not formed. Arise. Therefore, the width w in the radial direction of the stepped surface 13 is preferably about 0.1 to 0.3 mm (more preferably 0.2 to 0.3 mm) regardless of the diameter of the processed hole 11.

  The first press contact portion 32 that seals the adhesive reservoir 31 is formed by press-fitting the side surface 20 a of the plug stopper 20 into the inner surface 12 a of the plug stopper press-fitting hole 12. The second pressure contact portion 33 that seals the adhesive reservoir 31 is formed by the curved surface 20 c of the plug stopper 20 being in pressure contact with the stepped surface 13, and the second pressure contact portion 33 is formed by the curved surface 20 c of the plug stopper 20. Is properly formed by pressure contact until the plastic deformation portion 33a is formed at the end of the stepped surface 13. At this time, it is necessary to surely form the plastic deformation portion 33a. By confirming that the plastic deformation portion 33a is formed, there is some error in the shape and size of the top portion 20b of the plug stopper 20. Even in this case, the adhesive reservoir 31 in a sealed state can be formed.

  Further, the angle θ between the step surface 13 and the inner surface of the processing hole 11 is set by the tip shape of the processing tool when the plug stopper press-fitting hole 12 is formed, and the second press-contact portion 33 described above can be formed. It can be formed at any angle. In order to form the adhesive reservoir 31 with a sufficient size, it is preferable that the gap between the curved portion 20c and the corner portion 14 of the plug stopper 20 is separated. For this purpose, the step surface 13 and the processing hole 11 are separated. The angle θ with respect to the inner surface is preferably approximately 90 °.

  2 and 3 are explanatory diagrams for explaining a plug sealing method for a non-ferrous metal structure machining hole according to an embodiment of the present invention. This method includes a stepped surface forming step (see FIGS. 2A and 2B), an adhesive application step (see FIG. 2C), and a plug plug press-fitting step (see FIGS. 3A and 3B). Have

  As shown in FIG. 2A, the stepped surface forming step is a plug plug press-fitting with a diameter larger than the processing hole 11 and concentric with the processing hole 11 into the opening 11 b of the processing hole 11 formed in the non-ferrous metal structure 10. By forming the hole 12, a step surface 13 is formed between the inner surface 11a of the processing hole 11 and the inner surface 12a of the plug plug press-fitting hole 12. After a drilling tool having a predetermined diameter is attached to the fixed non-ferrous metal structure 10 to the drilling device and the machining hole 11 is formed with this drilling tool, for example, the fixing relationship between the non-ferrous metal structure and the drilling device is set. While maintaining this, the drilling tool is replaced with one having a slightly larger diameter, and the plug stopper press-fitting hole 12 is formed with the drilling tool (FIG. 2B).

  Next, as shown in FIG. 2 (c), the adhesive application step has a side surface 20 a that is fitted into the inner surface 12 a of the plug stopper press-fitting hole 12 and a curved surface 20 c that forms a top portion 20 b that is continuous with the side surface 20 a. This is a step of applying the adhesive 30 into the plug plug 20 or the plug plug press-fitting hole 12 using the plug plug 20. The adhesive 30 may be applied to one or both of the plug stopper press-fitting hole 12 and the plug stopper 20.

  The plug plug press-fitting step is a step of press-fitting the plug plug 20 into the plug plug press-fitting hole 12, as shown in FIGS. 3 (a) and 3 (b). In this plug plug press-fitting process, the side surface 20a of the plug plug 20 is fastened to the inner surface 12a of the plug plug press-fitting hole 12 to form the first press contact portion 32 (see FIG. 1B). By pressing the curved surface 20 c against the step surface 13, a second press-contact portion 33 (see FIG. 1B) in which the step surface 13 is plastically deformed is formed, and the inner surface 12 a and the step surface 13 of the plug plug press-fitting hole 12 are formed. The first pressure contact portion 32 and the second pressure contact portion 33 are used to seal the adhesive 30 between the entire circumference of the corner portion 14 and the curved surface 20c of the plug plug 20 press-fitted into the plug plug press-fitting hole 12. This is a step of forming the adhesive reservoir 31 to be sealed.

  In the plug plug press-fitting step, as shown in FIG. 3A, the plug plug 20 is fitted into the plug plug press-fitting hole 12 with the adhesive 30 applied to the plug plug 20 side or the plug plug press-fitting hole 12 side. The tip of the press-fit cylinder 50a is brought into contact with the plug plug 20 to operate the press-fit cylinder 50a. Then, as shown in FIG. 3B, the plug stopper 20 is press-fitted into the plug stopper press-fitting hole 12, the curved surface 20c of the plug stopper 20 is pressed against the step surface 13, and the second press-contact portion 33 (plastic deformation portion). When 33a) is formed, the operation of the press-fit cylinder 50a is stopped.

  In the plug plug press-fitting step, the sealing performance of the plug sealing structure 1 is improved by confirming the formation of the second pressure contact portion 33 as shown in FIG. 1B, that is, the formation of the plastic deformation portion 33a. Can do. For this purpose, it is preferable to detect the press-fitting load in the plug plug press-fitting step and recognize the formation of the second press-contact portion 33 by the change of the press-fitting load. The press-fit load here can be detected by a resistance (reaction force) received by the press-fit cylinder 50a when the press-fit cylinder 50a is operated. If the second press-contact portion 33 cannot be recognized due to a change in the press-fit load, the proper sealing performance of the plug sealing structure 1 may not be obtained. In such a case, it is determined that there is an abnormality in the press-fit process. can do.

  In the press-fitting process abnormality determination, the press-fitting load and the press-fitting displacement can be detected in the plug plug press-fitting process, and the press-fitting process abnormality can be determined based on the relationship between the press-fitting load and the press-fitting displacement. The press-fitting displacement here is a displacement of the plug plug 20 in the plug plug press-fitting hole 12 and can be detected by an operation stroke of the press-fitting cylinder 50a. More specifically, in the plug plug press-fitting process, it is possible to determine that the press-fitting process is abnormal when a sharp rise of the press-fitting load is not detected with respect to the increase of the press-fitting displacement. When the plug plug 20 is press-fitted into the plug plug press-fitting hole 12, the press-fitting load does not change greatly when the side surface 20a slides on the plug plug 20 on the inner surface 12a of the plug plug press-fitting hole 12. Thereafter, when the curved surface 20c of the plug plug 20 abuts on the stepped surface 13 to form the plastic deformation portion 33a, the press-fitting load changes sharply. The formation of the second press-contact portion 33 can be recognized by detecting the steep rise of the press-fit load.

  Further, in the plug plug press-fitting process, the plug plug 20 is stopped from being pressed at an appropriate position of the plug plug press-fitting hole 12a so that the plug plug 20 is not excessively press-fitted. At this time, it is preferable to stop the press-fitting of the plug plug 20 when the formation of the second press-contact portion 33 is confirmed. Specifically, in the plug plug press-fitting step, the press-fitting load and the press-fitting displacement are detected, and when the press-fitting load at the set press-fitting displacement exceeds a threshold value, the press-fitting operation with respect to the plug plug 20 is stopped. Further, in the plug plug press-fitting process, the press-fitting load and the press-fitting displacement are detected, and when the amount of change in the press-fitting load in the set press-fitting displacement exceeds a threshold value, the press-fitting operation to the plug plug is stopped. By doing so, it is possible to stop the press-fitting operation of the plug stopper 20 after confirming that the plug stopper 20 has been press-fitted to an appropriate position.

  FIG.4 and FIG.5 is explanatory drawing explaining the process management apparatus in the plug sealing method of the nonferrous metal structure processed hole based on embodiment of this invention. The process management apparatus 100 is provided as an accessory for managing whether or not each process of the plug sealing method for the non-ferrous metal structure processing hole described above is properly executed.

  The example shown in FIG. 4 is for managing the quality of the adhesive application state in the above-described adhesive application process, and the process management apparatus 100 includes the above-described adhesive application process and the above-described plug plug press-in process. The plug plug press-fitting hole 12 or the plug plug 20 is imaged, and a determination unit (application state determination unit 101) is provided for determining whether the adhesive 30 is applied or not based on the image data.

  In the example shown in the figure, a case where the adhesive 30 is applied in the plug stopper press-fitting hole 12 is shown. In this case, the imaging device 51 is arranged so that an image in the plug plug press-fitting hole 12 can be taken, and the process management device 100 controls the operation of the imaging device 51 and acquires imaging data obtained by the imaging device 51. To perform arithmetic processing. The application state discriminating means 101 provided in the process management apparatus 100 performs image processing on the imaging data acquired from the imaging device 51 and compares it with an image in the case where good adhesive application is performed. Is output. The present invention is not limited to this, and the application state determination unit 101 may be a display unit that displays the obtained imaging data so that it can be visually determined. Further, in the illustrated example, an image in the plug stopper press-fitting hole 12 is taken, but when an adhesive is applied to the plug stopper 20 side, a surface image of the plug stopper 20 before being press-fitted is taken.

  The example shown in FIG. 5 is for managing the quality of the press-fitting state or the press-fitting operation in the plug plug press-fitting process described above, and this process management device 100 is a press-fitting for detecting a press-fitting load in the plug plug press-fitting process. The load detecting means 102, the press-fit displacement detecting means 103 for detecting the press-fit displacement, the abnormality determining means 104 for judging the abnormality of the press-fit process, and the press-fit operation stopping means 105 for stopping the press-fit operation for the plug plug 20 at an appropriate position are individually or combined. Prepare.

  In the illustrated example, the process management device 100 controls the operation of the press-fitting device 50 that operates the press-fitting cylinder 50a, and acquires the output data of the load cell in the press-fitting device 50. The press-fit load detecting means 102 detects press-fit load based on the output of the load cell, and the press-fit displacement detecting means 103 detects press-fit displacement from the stroke output of the press-fit cylinder 50a.

  The abnormality determination unit 104 performs an arithmetic process on the output of the press-fit load detection unit 102 and the output of the press-fit displacement detection unit 103, and determines an abnormality in the press-fitting process based on the relationship between the press-fit load and the press-fit displacement. More specifically, the abnormality determination unit 104 determines that the press-fitting process is abnormal when a sharp rise of the press-fitting load is not detected with respect to the increase of the press-fitting displacement.

  The press-fit operation stop means 105 performs an arithmetic process on the output of the press-fit load detection means 102 and the output of the press-fit displacement detection means 103, and when the press-fit load at the set press-fit displacement exceeds a threshold value, the press-fit operation to the plug plug 20 is performed. Or when the amount of change in the press-fit load at the set press-fit displacement exceeds a threshold value, the press-fit operation to the plug plug 20 is stopped.

  According to the plug sealing structure 1 and the plug sealing method of such a non-ferrous metal structure processing hole, the first side surface 20a of the plug plug 20 is formed by being press-fitted into the inner surface 12a of the plug plug press-fitting hole 12. In addition to the pressure contact portion 32, the second pressure contact portion 33 formed by the curved surface 20c of the plug plug 20 being in pressure contact with the stepped surface 13 is formed, so that the entire periphery of the curved surface 20c of the plug plug 20 is formed. Thus, an adhesive reservoir 31 in a sealed state is formed. As a result, even if there is a fine gap in the first pressure contact portion 32 or the second pressure contact portion 33, the sealing performance in the plug plug 20 is reduced due to the presence of the adhesive reservoir 31 formed therebetween. It will be kept high. In particular, by using a permeable adhesive as the adhesive 30, when there is a fine gap in the first pressure contact portion 32 or the second pressure contact portion 33, the permeable adhesive penetrates into the gap and is more reliable. Moreover, the sealing performance in the plug stopper 20 can be maintained. The adhesive reservoir 31 is formed between the entire circumference of the corner between the inner surface 12a of the plug plug press-fitting hole 12 and the step surface 13 and the curved surface 20c of the plug plug 20 press-fitted into the plug plug press-fitting hole 12. It is not necessary to fill the entire space with the adhesive 30, and it is sufficient that the adhesive reservoir 31 is formed in a state of being sealed around the entire circumference of the curved surface 20 c of the plug stopper 20.

  Further, deformation of the non-ferrous metal structure 10 due to heat, a difference in thermal expansion coefficient between the non-ferrous metal structure 10 and the plug plug 20, vibration applied to the non-ferrous metal structure 10, change over time of the non-ferrous metal structure 10 Even if the first pressure contact portion 32 between the side surface 20a of the plug plug 20 and the inner surface 12a of the plug plug press-fitting hole 12 is loosened due to the above, etc., the second pressure contact portion 33 and the second pressure contact Due to the presence of the adhesive reservoir 31 located outside the portion 33, the sealing performance inside the plug stopper 20 can be maintained. Accordingly, high sealing performance can be maintained even when the plug sealing structure 1 is applied to an engine structure or the like that is used under heating conditions or vibration conditions.

  Furthermore, since the adhesive reservoir 31 is formed between the first pressure contact portion 32 and the second pressure contact portion 33, the first portion between the side surface 20a of the plug plug 20 and the inner surface 12a of the plug plug press-fitting hole 12 is used. No groove or the like is formed in the pressure contact portion 32, and the first pressure contact portion 32 can maintain a high retaining resistance of the plug stopper 20 against a pressure change in the non-ferrous metal structure.

  The following is an example in which a non-ferrous metal structure is cast as an aluminum product, and a steel saddle plug is press-fitted into the processing hole. FIG. 6 is an example of a case where the plug diameter is 16 mm, and is a cross-sectional shape diagram illustrating an example of forming the stepped surface 13 and an example of forming the second pressure contact portion 33. FIG. 7 is a cross-sectional shape diagram showing an example of forming the stepped surface 13 and an example of forming the second pressure contact portion 33 when the plug diameter is 25 mm. Each figure (a) is a formation example of the step surface 13 before press-fitting, each figure (b) is a formation example of the second pressure contact portion 33, and each figure (c) is a comparison between the step surface 13 and the second pressure contact portion 33. The shape is shown.

  In the example shown in FIG. 6, the angle θ1 between the step surface 13 and the inner surface 11a of the processed hole 11 is about 120 ° as shown in FIG. 6A, and the second angle as shown in FIG. The pressure contact portion 33 is formed in a range of 0.18 mm in the axial direction and 0.095 mm in the radial direction. In the example shown in FIG. 7, the angle θ1 between the step surface 13 and the inner surface 11a of the processed hole 11 is about 90 ° as shown in FIG. 7A, and the second angle as shown in FIG. The pressure contact portion 33 is formed in a range of 0.26 mm in the axial direction and 0.13 mm in the radial direction. In addition, the example shown in FIG. 7 can enlarge the formation area of the 2nd press-contact part 33 with respect to the example shown in FIG. 6, and can obtain higher sealing performance.

  FIG. 8 is a detected value line diagram showing an example of the relationship between the press-fit load and the press-fit displacement in the plug plug press-fitting process. The solid line in FIG. 6A shows a detection example when the plug diameter is 16 mm shown in FIG. 6, and the solid line in FIG. 6B shows a detection example when the plug diameter is 25 mm shown in FIG. Moreover, the broken line of the same figure (a), (b) has shown the detection example of the press-fit load and press-fit displacement in case the level | step difference surface is not formed on the same conditions.

  In FIGS. 4A and 4B, when the press-fit displacement exceeds the point p, the press-fit load rises sharply. That is, from the relationship between the press-fit displacement and the press-fit load, it can be confirmed that the amount of change in the press-fit load with respect to the press-fit displacement is remarkably increased at the point p. It is considered that when the point p is reached, the curved surface 20c of the plug plug 20 contacts the step surface 13. Therefore, the second press-contact portion 33 having the plastic deformation portion 33a shown in FIG. 1B can be reliably obtained by securing the press-fit displacement by a predetermined displacement thereafter. In order to confirm that the second press-contact portion 33 is properly formed, the press-fitting load exceeds the threshold value set after the point p has passed and the press-fitting load has risen, or after the point p has passed. This can be confirmed with reference to when the load change amount exceeds a set threshold. And the plug sealing structure 1 with high sealing performance can be obtained by confirming that the 2nd press-contact part 33 was formed appropriately, and stopping the press-fit operation | movement with respect to the plug stopper 20. FIG.

  Further, as shown by the broken lines in FIGS. 8A and 8B, when there is no step portion 13, even if the press-fit displacement is increased, a sharp change in press-fit load does not occur. Therefore, if the sudden rise of the press-fit load is not detected when the press-fit displacement is increased, it may be determined that there is an abnormality in the plug plug press-fit process because an appropriate step surface 13 is not formed. it can.

  In addition, although the Example showed the example of the aluminum structure as the nonferrous metal structure 10, the same effect is acquired also with magnesium (a magnesium alloy is included) other than aluminum (aluminum alloy is included).

1: plug sealing structure,
10: Non-ferrous metal structure, 11: Processing hole, 11a: Inner surface, 11b opening,
12: Plug plug press-fitting hole, 12a: Inner surface,
13: Step surface, 14: Corner part,
20: Plug stopper, 20a: Side, 20b: Top, 20c: Curved surface,
30: Adhesive, 31: Adhesive reservoir,
32: 1st press contact part, 33: 2nd press contact part, 33a: Plastic deformation part,
50: Press-fit device, 50a: Press-fit cylinder,
51: Imaging device,
100: Process management device, 101: Application state determination means,
102: Press-fit load detecting means, 103: Press-fit displacement detecting means,
104: Abnormality determination means, 105: Press-fit operation stop means

Claims (16)

A plug sealing structure for sealing a processing hole of a non-ferrous metal structure with a plug plug,
A plug plug press-fitting hole having a diameter larger than the processing hole and concentric with the processing hole is provided at the opening of the processing hole, and a step surface is provided between the inner surface of the plug plug press-fitting hole and the inner surface of the processing hole. Have
The plug plug has a curved surface that forms a side surface that is fitted into the inner surface of the plug plug press-fitting hole and a top portion that is continuous with the side surface,
Between the inner periphery of the plug plug press-fitting hole and the entire corner of the stepped surface and the curved surface of the plug plug press-fitted into the plug plug press-fitting hole, the plug plug press-fitting hole or the plug plug An adhesive reservoir that encloses the applied adhesive is formed,
The adhesive reservoir is formed by pressing the side surface of the plug plug into the inner surface of the plug plug press-fitting hole and pressing the curved surface of the plug plug against the step surface. A plug sealing structure for a non-ferrous metal structure machining hole, characterized in that it is sealed with a second press-contact portion formed by plastically deforming the surface.   The plug sealing structure for a non-ferrous metal structure processed hole according to claim 1, wherein the adhesive is a permeable adhesive.   3. The plug sealing structure for a non-ferrous metal structure processed hole according to claim 1, wherein the adhesive is an anaerobic adhesive.   The plug sealing structure for a non-ferrous metal structure machining hole according to any one of claims 1 to 3, wherein a width in a radial direction of the step surface is 0.1 to 0.3 mm.   The plug sealing structure for a non-ferrous metal structure processing hole according to any one of claims 1 to 4, wherein an angle between the step surface and the inner surface of the processing hole is approximately 90 °. A plug sealing method for sealing a processed hole of a non-ferrous metal structure with a plug plug,
A stepped surface is formed between the inner surface of the processing hole and the inner surface of the plug plug press-fitting hole by forming a plug plug press-fitting hole having a diameter larger than the processing hole and concentric with the processing hole at the opening of the processing hole. Forming a stepped surface to form
Adhesive for applying an adhesive into the plug plug or the plug plug press-fitting hole by using a plug plug having a side surface that is fastened to the inner surface of the plug plug press-fitting hole and a curved surface that forms a continuous top portion on the side surface Application process;
A plug plug press-fitting step of press-fitting the plug plug into the plug plug press-fitting hole,
The plug plug press-fitting step includes:
A first press contact portion is formed by tightly fitting the side surface of the plug plug to the inner surface of the plug plug press-fitting hole, and the stepped surface is plastically deformed by pressing the curved surface of the plug plug to the stepped surface. A second press-contact portion, and between the entire inner periphery of the plug plug press-fitting hole and the stepped surface, and the curved surface of the plug plug press-fitted into the plug plug press-fitting hole, A plug sealing method for a non-ferrous metal structure processing hole, characterized in that an adhesive pool for sealing the adhesive is formed by sealing at the first pressure contact portion and the second pressure contact portion.   The plug of a non-ferrous metal structure machining hole according to claim 6, wherein, in the plug plug press-fitting step, a press-fitting load is detected and the formation of the second press-contact portion is recognized by a change in the press-fitting load. Sealing method.   8. The plug plug press-fitting step detects a press-fitting load and a press-fitting displacement, and determines an abnormality in the press-fitting step based on a relationship between the press-fitting load and the press-fitting displacement. Non-ferrous metal structure processing hole sealing method.   9. The non-ferrous metal structure according to claim 8, wherein, in the plug stopper press-fitting step, it is determined that the press-fitting step is abnormal when a steep rise of the press-fitting load is not detected with respect to the increase of the press-fitting displacement. Method of plugging the processed hole.   The plug plug press-fitting step detects a press-fitting load and a press-fitting displacement, and stops the press-fitting operation with respect to the plug plug when the press-fitting load at the set press-fitting displacement exceeds a threshold value. The plug sealing method of the non-ferrous metal structure processed hole described in 6 or 7.   In the plug plug press-fitting step, a press-fitting load and a press-fitting displacement are detected, and when the amount of change of the press-fitting load in the set press-fitting displacement exceeds a threshold value, the press-fitting operation to the plug plug is stopped. The plug sealing method for a non-ferrous metal structure processing hole according to claim 6 or 7. A process management apparatus for managing the process of the plug sealing method of the non-ferrous metal structure processing hole according to claim 6,
A non-ferrous metal structure comprising an abnormality determining means for detecting a press-fitting load and a press-fitting displacement in the plug plug press-fitting step and determining an abnormality in the press-fitting step based on a relationship between the press-fitting load and the press-fitting displacement. A process management device in a plug sealing method for processed holes. The abnormality determining means includes
The method of sealing a non-ferrous metal structure machining hole according to claim 12, wherein when the sudden rise of the press-fit load is not detected with respect to the increase of the press-fit displacement, it is determined that the press-fit process is abnormal. Process management equipment. A process management apparatus for managing the process of the plug sealing method of the non-ferrous metal structure processing hole according to claim 6,
In the plug plug press-fitting step, press-fitting operation stop means is provided for detecting a press-fitting load and a press-fitting displacement and stopping the press-fitting operation with respect to the plug plug when the press-fitting load at the set press-fitting displacement exceeds a threshold value. The process control apparatus in the plug sealing method of the non-ferrous metal structure processed hole described in claim 12. A process management apparatus for managing the process of the plug sealing method of the non-ferrous metal structure processing hole according to claim 6,
In the plug plug press-fitting step, press-fitting operation stop means for detecting a press-fitting load and a press-fitting displacement and stopping the press-fitting operation with respect to the plug plug when a change amount of the press-fitting load in the set press-fitting displacement exceeds a threshold value. A process management apparatus in a plug sealing method for a non-ferrous metal structure processing hole. A process management apparatus for managing the process of the plug sealing method of the non-ferrous metal structure processing hole according to claim 6,
An image is provided between the adhesive application step and the plug plug press-fitting step, and the disc plug press-fitting hole or the plug plug is imaged, and discriminating means is provided for discriminating whether the adhesive is applied or not based on the image data. The process control apparatus in the plug sealing method of the non-ferrous metal structure processed hole.

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