JP4567959B2 - Metal panel positioning hole forming method and metal panel positioning hole structure - Google Patents

Description

  The present invention relates to a method for forming a positioning hole for a metal panel and a positioning hole portion structure for a metal panel, and more particularly to a method for forming a positioning hole and a positioning hole portion structure for positioning a metal panel by inserting a reference pin for positioning.

  For example, when positioning various metal panels for automobiles during press processing or assembling the pressed metal panels, positioning holes previously drilled in the metal panels are used as positioning positions for the metal panels. This is done by inserting it into the reference pin. In order to appropriately regulate the insertion angle of the metal panel with respect to the reference pin when positioning the metal panel, the positioning hole is generally formed by burring.

  In this type of burring processing method, for example, in the first step shown in FIG. 17A, the protrusion 101 protruding upward by pressing from above is applied to the metal panel 100 by the lower mold 103 and the upper mold 104. Form. In the second step shown in the following (b) to (d), the metal panel 100 is placed on the lower die 105 with the convex portion 101 facing upward, and the convex portion 101 of the metal panel 100 is lowered toward the lower die 105. The lower die 105 is pressed against the burring punch 105a provided on the lower die 105 by the lower surface 106a of the upper die restrictive die 106 provided on the upper die. By this pressing, the top part of the convex part 101 is pierced by the blade part 105b provided on the burring punch 105a, and the upper part of the rusting die 106 into which the burring punch 105a can enter the pierced convex part 101 of the metal panel 100. A cylindrical collar 101a is known that extends upward due to the pressure between the inner peripheral surface of the recess 106b and the outer peripheral surface of the burring punch 105a (see, for example, Patent Document 1).

  Further, as shown in a process diagram in FIG. 18, a drawing process for forming a cylindrical recess 111 in which a slope 113 is formed toward a bottom center 112 in a drawing hole making process in a flat metal panel 110, and the cylinder Punching process is performed to punch the bottom center 112 of the concave portion 111, and in the hole expanding process, the hole of the metal panel 110 processed in the drawing hole forming process is expanded, and a cylindrical collar 114 is formed around the expanded hole. A burring method is also known (see, for example, Patent Document 2).

JP-A-8-10867 JP 2001-225116 A

  According to the burring method disclosed in Patent Document 1, the first step for forming the convex portion and the second step for forming the hole and the cylindrical collar are different processes in the first step and the second step. Since a mold is required, the equipment cost and manufacturing cost increase. In addition, there is a concern that the positional accuracy of the burring hole is lowered due to the displacement of the metal panel between the first step and the second step. In addition, since the collar is formed by the upper mold-like die and the burring punch, the size of the burring hole is limited. On the other hand, since a large-diameter reference pin is used for positioning during pressing of a large metal panel or when assembling a pressed metal panel, it is not preferable as a positioning hole.

  According to the burring method disclosed in Patent Document 2, a drawing process for forming a cylindrical recess, a drilling process for punching a hole at the center of the bottom surface of the recess, and a cylinder by expanding a hole punched in the drawing drilling process. A burring hole having a relatively large diameter can be formed by expanding the hole punched in the squeeze drilling process in the hole expanding process. However, since different processing dies are required for the drawing hole expanding process and the hole expanding process, the equipment cost and the manufacturing cost increase. In addition, there is a concern that the positional accuracy of the burring hole is lowered due to the displacement of the metal panel between the drawing hole forming process and the hole expanding process.

  Accordingly, an object of the present invention made in view of such a point is to form a positioning hole for a metal panel that can be formed with high accuracy even with a positioning hole having a relatively large diameter and can be expected to reduce the equipment cost and the manufacturing cost. And it is providing the positioning hole part structure of a metal panel.

According to a first aspect of the present invention, there is provided a positioning hole forming method for positioning a metal panel by inserting a positioning reference pin, wherein the metal panel is formed when the metal panel is formed. A positioning hole forming portion having a plurality of convex portions protruding radially from the reference surface of the metal panel with the positioning virtual reference position as a center , and the convex portion including at least a side surface having an inclined range is formed in the metal panel. A positioning hole having a diameter including an inclination range of the side surface that is not parallel to the reference surface of each convex portion around an axis perpendicular to the reference surface with respect to a forming step and a preset reference position of positioning of the metal panel. And a drilling step for drilling.

  According to a second aspect of the present invention, there is provided a positioning hole forming method for positioning a metal panel by inserting a positioning reference pin, wherein the metal panel is formed when the metal panel is formed. A plurality of extending portions are formed radially around the positioning virtual reference position, and an upper surface portion parallel to the reference surface of the metal panel and a vertical range orthogonal to the upper surface portion along the side edge of each extending portion. A forming step of forming a positioning hole forming portion having a side surface continuous with the reference surface on the metal panel, and an axis perpendicular to the reference surface based on a preset positioning reference position of the metal panel. A drilling step of drilling a positioning hole having a diameter including each extending portion and the vertical range.

  According to a third aspect of the present invention, there is provided a positioning hole forming method for positioning a metal panel by inserting a positioning reference pin, wherein the metal panel is formed when the metal panel is formed. Positioning hole formation having a plurality of convex portions formed by a pair of side surfaces that are continuous through respective ridge lines extending radially from the positioning virtual reference position and that are separated from each other as they move to the reference surface side of the metal panel And forming a positioning hole having a diameter including each of the side surfaces and the reference surface around an axis orthogonal to the reference surface with reference to a predetermined positioning reference position of the metal panel. And a drilling step.

  According to a fourth aspect of the present invention, in the method for forming a positioning hole for a metal panel according to any one of the first to third aspects, the positioning hole is formed by machining.

Positioning hole part structure of the metal panel according to claim 5, in the positioning hole structure for positioning the metal panel by insertion of the reference pin for positioning, radially around the positioning virtual reference position of the metal panel, the metal A positioning hole forming portion having a plurality of convex portions protruding from the reference surface of the panel , and the convex portion having a side surface having at least an inclined range, and orthogonal to the reference surface with reference to the positioning reference position of the metal panel A positioning hole having a diameter including an inclination range that is not parallel to the reference surface of each of the convex portions around the axis is provided.

  According to a sixth aspect of the invention, there is provided a positioning hole portion structure for positioning a metal panel by inserting a reference pin for positioning. Side surfaces that are formed radially and have a top surface that is parallel to the reference surface of the metal panel and a vertical range that is perpendicular to the top surface along the side edges of the extended portions and that are continuous with the reference surface. A positioning hole forming portion formed in the metal panel, and a positioning hole having a diameter including each extending portion and a vertical range around an axis perpendicular to the reference plane with a positioning reference position of the metal panel as a center It is characterized by having.

  According to a seventh aspect of the present invention, there is provided a positioning hole structure for positioning a metal panel by inserting a reference pin for positioning. The positioning hole structure extends radially from a positioning virtual reference position of the metal panel. A positioning hole forming portion having a plurality of convex portions formed by a pair of side surfaces which are continuous with each other existing ridgeline and are separated from each other as they move to the reference surface side of the metal panel, and a positioning reference position of the metal panel And a positioning hole having a diameter including each of the side surfaces and the reference surface with an axis perpendicular to the reference surface as a center.

  According to the first aspect of the present invention, since the positioning hole is formed in advance together with the molding of the metal panel in the molding process and the positioning hole is drilled in the drilling process, the substantial processing step for forming the positioning hole is the drilling process. Therefore, the equipment cost and the manufacturing cost can be reduced. Further, by drilling the positioning hole in the positioning hole formed in the molding process with reference to a preset reference position, even a comparatively large positioning hole can be drilled with high positional accuracy without being displaced.

Further, by piercing the positioning hole of diameter including tilt range is not parallel to the base reference plane of the convex portion of the positioning hole forming section about an axis orthogonal to the reference plane, positioned on the outer periphery of the reference pin that fits into the positioning hole The hole makes contact with the metal panel with high accuracy, and the positioning hole makes contact with the axial direction of the reference pin so that the inclination of the metal panel with respect to the reference pin is suppressed and positioning can be performed satisfactorily.

  The invention of claim 2 is a more specific configuration of the invention of claim 1, wherein the positioning hole is formed in advance together with the molding of the metal panel in the molding process, and the positioning hole is drilled in the drilling process. In the same way as the above, a reduction in equipment cost and manufacturing cost can be expected, and even a relatively large diameter positioning hole can be drilled with high positional accuracy. In addition, a circumferential contact portion extending in an arcuate circumferential direction is formed in each extending portion of the upper surface portion by drilling the positioning hole, and the metal panel can be positioned with high accuracy by contacting the outer periphery of the reference pin. Furthermore, an axial contact portion that contacts the outer periphery of the reference pin along the axial direction is formed in the vertical range of the side surface, and the inclination of the metal panel with respect to the reference pin is suppressed, so that positioning can be performed satisfactorily.

  The invention of claim 3 is a more specific configuration of the invention of claim 1, wherein the positioning hole is formed in advance together with the forming of the metal panel in the forming process, and the positioning hole is drilled in the drilling process. As in the case of No. 1, it is possible to expect a reduction in equipment cost and manufacturing cost, and even a relatively large diameter positioning hole can be drilled with high positional accuracy. In addition, a circumferential contact portion that is circumferentially continuous with the reference surface is formed by drilling the positioning hole, and an axial contact portion that is inclined in the axial direction with respect to the circumferential direction is formed on the side surface. In addition, the axial contact portion continuously contacts the outer periphery of the reference pin in the circumferential direction so that the metal panel can be positioned with high accuracy, and the axial contact portion contacts the outer periphery of the reference pin with a predetermined width in the axial direction. Therefore, the inclination of the metal panel with respect to the reference pin is suppressed and positioning can be performed satisfactorily.

  According to invention of Claim 4, even if it is a positioning hole of comparatively large diameter by drilling a positioning hole by machining, it can drill easily with high precision.

According to the invention of claim 5, by been positioned holes drilled in diameter containing tilt range is not parallel to the base reference plane of the protrusions of the positioning mold portion about an axis perpendicular to the reference plane, along the axial direction positioning holes The positioning hole abuts on the outer periphery of the reference pin to be inserted and the metal panel can be positioned with high accuracy, and the positioning hole abuts even in the axial direction of the reference pin and the inclination of the metal panel with respect to the reference pin is suppressed. It can be positioned well.

  According to the invention of claim 6, the arc-shaped circumferential contact portion formed on each extending portion of the upper surface portion by the perforation of the positioning hole contacts the outer periphery of the reference pin in the circumferential direction with high accuracy. Positioning is possible, and the axial contact portion formed in the vertical range of the side surface contacts the outer periphery of the reference pin along the axial direction, and the inclination of the metal panel with respect to the reference pin can be suppressed and positioning can be performed satisfactorily.

  According to the seventh aspect of the present invention, the circumferential contact portion formed on the reference surface and the axial contact portion formed on the side surface are continuously in contact with the outer periphery of the reference pin in the circumferential direction. The metal panel can be positioned with high accuracy, and the axial contact portion formed on the side surface can contact the outer periphery of the reference pin with a predetermined width in the axial direction to suppress the inclination of the metal panel with respect to the reference pin. .

  An embodiment of a metal panel positioning hole forming method and a metal panel positioning hole structure according to the present invention will be described with reference to the drawings.

(First embodiment)
A metal panel positioning hole forming method and a positioning hole structure according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a diagram showing sequential steps. In the present embodiment, a positioning step is formed in a metal panel by sequentially performing a forming step S1 and a drilling step S2.

  First, in the molding step S1, for example, when a metal panel such as an automobile floor panel is molded by press molding or the like, a portion where a positioning hole is formed is also molded. Here, when the metal panel 1 is press-molded by the lower mold A and the upper mold B as shown in FIG. 2, a virtual reference that will be the center position of the positioning hole 30 formed in the drilling step S <b> 2. The positioning hole forming portion 10 is formed in a radial manner from the reference surface 2 of the metal panel 1 centering on the position, and in this embodiment, the positioning hole forming portion 10 is continuously raised in all directions.

  Refer to the plan view shown in FIG. 3, the sectional view taken along the line II in FIG. 3 shown in FIG. 4, the sectional view taken along the line II-II in FIG. 3, and the perspective view in FIG. I will explain.

  The positioning hole forming portion 10 is substantially rectangular on each of the sides 11a-11b, 11b-11c, 11c-11d, 11d-11a of a rectangular basic shape having corners 11a, 11b, 11c, 11d centered on the virtual reference position. The extending portions 11A, 11B, 11C, and 11D have a substantially cruciform upper surface portion 11 that is formed in parallel with the radially formed reference surface 2 and at a position of, for example, about 8 to 10 mm from the reference surface 2. ing. A rectangular inclined surface 12A in which the corners 12Aa and 12Ab are continuous with the reference surface 2 by being inclined so as to gradually approach the reference surface 2 via a line segment 11a formed between the corners 11Aa and 11Ab of the extending portion 11A. Are continuously formed.

  A rectangular inclined surface 12B that is inclined so as to gradually approach the reference surface 2 via a line segment 11b formed between the corner portions 11Ba and 11Bb of the extending portion 11B, and the corner portions 12Ba and 12Bb are continuous with the reference surface 2. Are continuously formed. Similarly, a rectangular inclined surface 12C in which the corners 12Ca and 12Cb are continuous with the reference surface 2 is continuously formed via a line segment 11c between the corners 11Ca and 11Cb of the extension portion 11C, and the corner of the extension portion 11D is formed. A rectangular inclined surface 12D in which the corners 12Da and 12Db are continuous with the reference surface 2 is continuously formed via a line segment 11d between the portions 11Da and 11Db.

  Furthermore, it continues to the upper surface portion 11 and the inclined surface 12A via the line segment 13a formed between the corner portions 11a and 11Aa which are the side edges of the extending portion 11A and the line segment 13b between the corner portions 11Aa and 12Aa. A substantially triangular side surface 13 continuous with the reference surface 2 is formed via a line segment 13c. The line segment 14a formed between the corners 11b and 11Ab which are the side edges of the extending part 11A and the line segment between the corners 11Ab and 12Ab are connected to the upper surface part 11 and the inclined surface 12A via 14b. A substantially triangular side surface 14 that is continuous with the reference surface 2 via a line segment 14c is formed. The side surface 13 is formed with a vertical range 13A perpendicular to the upper surface portion 11 along a line segment 13a that is a side edge of the extending portion 11A, and an inclined range 13B is formed between the vertical range 13A and the ridge line 13c. . Similarly, the side surface 14 is formed with a vertical range 14A that extends in a direction perpendicular to the upper surface 11 and in contact with and away from the reference surface 2 along a line segment 14a serving as a side edge of the extending portion 11A. An inclined range 14B is formed between the minute portion 14c and the minute portion 14c. The inclination range 13B of the side surface 13 and the inclination range 14B of the side surface 14 are inclined so as to be separated from each other as they move from the vertical ranges 13A and 14A toward the line segments 13c and 14c.

  Similarly, the upper surface portion 11 and the inclined surface 12B are continuous via a line segment 15a formed between the corner portions 11b and 11Ba and a line segment 15b formed between the corner portions 11Ba and 12Ba. Then, the side surface 15 continuous to the reference surface 2 is formed via the line segment 15c, and the line segment 16a and the corner portions 11Bb and 12Bb formed between the corner portions 11c and 11Bb which are side edges of the extending portion 11B are formed. A substantially triangular side surface 16 is formed which is continuous to the upper surface portion 11 and the inclined surface 12B via a line segment 16b therebetween and continuous to the reference surface 2 via a ridge line 16c. The side surface 15 has a vertical range 15A perpendicular to the upper surface portion 11 along the line segment 15a, and an inclined range 15B is formed between the vertical range 15A and the line segment 15c. Similarly, the side surface 16 is formed with a vertical range 16A perpendicular to the upper surface 11 along the ridge line 16a, and an inclined range 16B is formed between the vertical range 16A and the line segment 16c.

  A line segment 17a formed between the corner portions 11c and 11Ca and the line segment 17b between the corner portions 11Ca and 12Ca, which is the side edge of the extending portion 11C, continues to the upper surface portion 11 and the inclined surface 12C. A side surface 17 continuous with the reference surface 2 is formed via the minute portion 17c. The side surface 17 is formed with a vertical range 17A perpendicular to the upper surface portion 11 along the line segment 17a, and an inclined range 17B is formed between the vertical range 17A and the line segment 17c.

  A line segment 18a formed between the corner portions 11d and 11Cb and a line segment 18b between the corner portions 11Cb and 12Cb are connected to the upper surface portion 11 and the inclined surface 12C, and the line is formed. A side surface 18 continuous with the reference surface 2 is formed via the minute portion 18c. The side surface 18 is formed with a vertical range 18A perpendicular to the upper surface 11 along the line segment 18a, and an inclined range 18B is formed between the vertical range 18A and the line segment 18c.

  A line segment 19a formed between the corner portions 11d and 11Da serving as the side edges of the extending portion 11D and a line segment 19b between the corner portions 11Da and 12Da are connected to the upper surface portion 11 and the inclined surface 12C. A side surface 19 continuous with the reference surface 2 is formed via the minute portion 19c. The side surface 19 is formed with a vertical range 19A perpendicular to the upper surface portion 11 along the line segment 19a, and an inclined range 19B is formed between the vertical range 19A and the line segment 19c.

  Continuing to the upper surface portion 11 and the inclined surface 12C via the line segment 20a formed between the corner portions 11a and 11Db which are the side edges of the extending portion 11D and the line segment 20b between the corner portions 11Db and 12Db, A side surface 20 continuous with the reference surface 2 is formed via a line segment 20c. The side surface 20 is formed with a vertical range 20A perpendicular to the upper surface 11 along the line segment 20a, and an inclined range 20B is formed between the vertical range 20A and the ridge line segment 20c.

  The side surface 13 and side surface 20, the side surface 14 and side surface 15, the side surface 16 and side surface 17, and the side surface 18 and side surface 19 are formed continuously.

  Thus, in the positioning hole forming part 10 formed in the forming step S1, the protruding part 21 that protrudes from the reference surface 2 is formed by the extending part 11A of the upper surface part 11, the inclined surface 12A, and the side surface parts 13 and 14. A projecting portion 22 that protrudes from the reference surface 2 is formed by the extending portion 11B, the inclined surface 12B, and the side surface portions 15 and 16 of the upper surface portion 11, and the extending portion 11C, the inclined surface 12C, and the side surface portions 17 and 18 of the upper surface portion 11 are formed. As a result of the above, a convex portion 23 that protrudes from the reference surface 2 is formed, and a protruding portion 24 that protrudes from the reference surface 2 is formed by the extending portion 11D, the inclined surface 12D, and the side surface portions 19 and 20 of the upper surface portion 11. , 22, 23, and 24 are continuously formed radially around the virtual reference position.

  Thereafter, in the drilling step S2, the positioning hole 30 into which the reference pin is inserted is drilled by machining or the like in the subsequent press processing of the metal panel 1 or the assembly of the metal panel 1.

  The positioning hole 30 is drilled with reference to a preset reference position O of the metal panel 1 as indicated by a chain line in FIG. The positioning hole 30 is centered on the axis in the direction orthogonal to the reference surface 2 and the upper surface portion 11, and the extending portions 11 </ b> A, 11 </ b> B, 11 </ b> C, 11 </ b> D of the upper surface portion 11 and the vertical ranges 13 </ b> A to 14 </ b> A of the side surface portions 13 to 20. It is preferable to perforate with a diameter d that can be fitted to a reference pin body 41 of a reference pin 40 described later.

  The positioning hole forming portion 10 in which the positioning hole 30 is drilled in the drilling step S2 is shown in FIG. 7 as a perspective view, FIG. 8 is a plan view, FIG. 9 is a sectional view taken along line III-III in FIG. 8A and 8B, each of the extending portions 11A, 11B, 11C, and 11D of the upper surface portion 11 is formed with an arcuate circumferential contact portion 31 that forms a positioning hole 30. As shown in FIG. The Further, linear axial contact portions 32 that are orthogonal to the upper surface portion 11 are formed in the vertical range 13A of the side surface 13, the vertical range 14A of the side surface 14, and the vertical range 20A of the side surface 20, respectively.

  FIG. 11 is a cross-sectional view showing a state in which the metal panel 1 is positioned by fitting the positioning hole 30 to the positioning reference pin 40.

  In the reference pin 40, a conical guide portion 42 is formed at the tip of a cylindrical reference pin main body 41 standing at a metal panel positioning reference position such as a press die or an assembly jig, and the positioning hole 30 and the reference pin 40 are provided. The metal panel 1 is lowered and the positioning hole 30 is inserted from the tip 40a side of the reference pin 40, so that the arcuate shape formed in the extending portion 11A, 11B, 11C or 11D along with the insertion. The circumferential abutting portions 31 of the extending portions 11A, 11B, 11C, and 11D forming the positioning holes 30 are gradually positioned at the positioning reference position by abutting and slidingly contacting the guide portion 42. Is aligned with the outer periphery of the reference pin body 41 along the circumferential direction so that the metal panel 1 is positioned, and the linear axial contact formed on the side surfaces 13 and 14 to 20 is provided. 32 can be satisfactorily positioned inclined metal panel is suppressed with respect to the reference pin 40 by abutment with a predetermined width along its axis a direction on the outer peripheral surface of the reference pin body 41.

  Therefore, according to the present embodiment, the positioning hole 10 is formed in advance together with the molding of the metal panel 1 in the molding step S1 for molding the metal panel 1 by press molding or the like, and the positioning hole 30 is drilled in the drilling step S2. The substantial processing step for forming the positioning hole 30 is only one step of the drilling step S2, and a reduction in equipment cost and manufacturing cost can be expected. Further, since the positioning hole forming portion 10 formed together with the shape forming of the metal panel 1 in the forming step S1 is perforated by machining on the basis of the preset reference position O of the metal panel 1, Thus, the positioning hole forming portion 10 can be formed with high positional accuracy without being affected by the molding processing accuracy. Further, since the hole is drilled by machining, the positioning hole 30 having a relatively large diameter can be formed with high accuracy.

(Second Embodiment)
A second embodiment of the positioning hole forming method of the metal panel and the positioning hole structure according to the present invention will be described with reference to FIGS.

  In the present embodiment, similarly to the first embodiment, the forming step S1 and the drilling step S2 are sequentially performed to form positioning holes in the metal panel.

  First, in the forming step S1, the metal panel 1 is press-formed and the positioning hole portion is formed. Here, when the metal panel 51 is pressed, a radial reference is formed from the reference surface 52 of the metal panel 51 around the virtual reference position that is the center of the positioning hole 90 formed in the drilling step S2 in the positioning hole forming portion. In the form, the positioning hole forming portion 60 that continuously protrudes in all directions is formed.

  The positioning hole forming portion 60 will be described with reference to the plan view shown in FIG. 12 and the perspective view of FIG.

  The positioning hole forming unit 60 has a virtual reference position that is, for example, about 8 to 10 mm away from the reference surface 52 as a vertex, and has a relatively large equidistant distance from the vertex 60a and an equiangular reference surface 52 around the vertex 60a. The upper four corners 63a, 63b, 63c, 63d are relatively small equidistant from the apex 60a and between the corners 63d and 63a, between the corners 63a and 63b, between the corners 63b and 63c, There are four corners 64a, 64b, 64c, and 64d on the reference surface 52 that are located between the parts 63c and 63d and are equiangular with the vertex 60a as the center.

  The reference plane 52 is a triangle between a line segment 65a between the vertex 60a and the corner 63a, a line segment 66a between the vertex 60a and the corner 64a, and a line segment 67a between the corner 63a and the corner 64a. A side surface 67 that is inclined with respect to is formed. A side surface 68 inclined with respect to the triangular reference plane 52 is formed between the line segment 65a, the line segment 66b between the apex 60a and the corner 64b, and the line segment 68a between the corner 63a and the corner 64b. The

  Similarly, a triangular side surface 69 is formed between a line segment 66b, a line segment 65b between the apex 60a and the corner 63b, and a line segment 69a between the corner 63b and the corner 64b. A triangular side surface 70 is formed between the line segment 65b, the line segment 66c between the vertex 60a and the corner part 64c, and the line segment 70a between the corner part 63b and the corner part 64c. A triangular side surface 71 is formed between the line segment 66c, the line segment 65c between the apex 60a and the corner 63c, and the line segment 71a between the corner 63c and the corner 64c. A triangular side surface 72 is formed between the line segment 65c, the line segment 66c between the vertex 60a and the corner 64d, and the line segment 72a between the corner 63c and the corner 64d. A triangular side surface 73 is formed between the line segment 66c, the line segment 65d between the vertex 60a and the corner 63d, and the line segment 73a between the corner 64d and the corner 63d. A triangular side surface 74 is formed between the line segment 65d, the line segment 66a, and the line segment 74a between the corner 63d and the corner 64a.

In this way, the positioning hole forming portion 60 formed in the forming step S1 has the reference surface 52 by the side surface 67 and the side surface 68 which are inclined so as to be separated from each other as the line segment 65a is continuously moved to the reference surface 52 side as a ridge line. Convex part 81 having a V-shaped cross section that protrudes from the surface is formed, and protrudes from reference surface 52 by side surface 69 and side surface 70 that incline so as to move away from each other as line segment 65b moves to reference surface 52 side. Convex portions 82 having a V-shaped cross section are formed, and a cross-section V-shape that protrudes from the reference surface 52 by the side surface 71 and the side surface 72 that inclines so as to move away from each other as the line segment 65c is moved to the reference surface 52 side. The side surface 73 and the side surface 74 are formed so as to be separated from each other as they move toward the reference surface 52 side with the line segment 65d as a ridge line. Therefore convex 84 consecutive V-shaped cross section which raised from the reference surface 52 is formed, the line segment 65A～ 65d which is a ridgeline of the convex portion 81, 82, 83, 84 are continuously formed radially around the apex 60a The

  Thereafter, in the drilling step S2, the positioning hole 90 into which the reference pin is inserted is drilled by machining or the like in the subsequent press processing or assembly of the metal panel 50.

  The positioning hole 90 is drilled with reference to a preset reference position O of the metal panel 50 as indicated by a chain line in FIG. The positioning hole 90 has a diameter d that divides each of the line segments 67a, 68a, 69a, 70a, 71a, 72a, 73a, and 74a that are contour lines of the positioning hole forming portion 60, with an axis in a direction orthogonal to the reference plane 52 as a center. In other words, it is preferable to perforate with a diameter d that includes the side surfaces 67 to 74 and the reference surface 52 and can be fitted to the reference pin 40.

  The positioning hole forming part 60 in which the positioning hole 90 is drilled in the drilling step S2 in this way shows a plan view in FIG. 14, FIG. 15 is a sectional view taken along the line VV in FIG. 14, and FIG. As shown in the VI cross-sectional view, four arc-shaped circumferential contact portions 91 are formed on the reference surface 52 with the reference position O as the center.

  On the other hand, on the side surfaces 67 and 68, axial contact portions 92 that are continuous with a line segment 65a that forms a ridge line by being inclined in the axial line a direction of the reference pin 40 with respect to the circumferential direction are formed. Similarly, the side surfaces 69 and 70 are formed with an axial contact portion 92 that is inclined in the direction of the axis a with respect to the circumferential direction and is continuous with the line segment 65b, and the side surfaces 71 and 72 are inclined in the direction of the axis a with respect to the circumferential direction. Thus, an axial contact portion 92 that is continuous at the line segment 65c is formed, and an axial contact portion 92 that is inclined in the direction of the axis line a with respect to the circumferential direction is formed on the side surfaces 73 and 74. The An axial contact portion 92 that is inclined in the direction of the axis a with respect to the circumferential direction and continuous with the line segment 65 b is formed on the side surfaces 69 and 70. These circumferential contact portions 91 and axial contact portions 92 are continuously formed in an annular shape in plan view.

  The metal panel 51 in which the positioning hole 90 formed in this way is formed, the reference pin 40 which is erected at the metal panel positioning reference position as shown by the phantom lines in FIG. 16 and FIG. 40, the metal panel 51 is lowered and the positioning hole 90 is inserted from the front end 40a side of the positioning reference pin 40, so that each circumferential contact portion 91 and each axial contact portion 92 are inserted along with the insertion. Are gradually positioned at the positioning reference position by contacting and sliding with the guide portion 42, and the circumferential contact portion 91 and the axial contact portion 92 that form the positioning hole 90 are annularly contacted with the outer periphery of the reference pin body 41. The metal panel 51 is positioned by fitting and the respective axial contact portions 92 are in contact with the outer peripheral surface of the reference pin main body 41 over a predetermined width in the axis a direction. Can be satisfactorily positioned without genus panel 51 is inclined with respect to the reference pin 40.

  Therefore, according to the present embodiment, the positioning hole 60 is formed in advance together with the metal panel 51 in the molding step S1 for molding the metal panel 1 by press molding or the like, and the positioning hole 90 is drilled in the drilling step S2. The substantial processing step for forming the positioning hole 30 is only one step of the drilling step S2, and a reduction in equipment cost and manufacturing cost can be expected. Further, since the positioning hole forming part 60 formed together with the shape forming of the metal panel 1 in the forming step S1 is perforated by machining based on the reference position O of the metal panel 51 set in advance, Thus, the positioning hole forming portion 90 can be formed with high positional accuracy without being affected by the molding processing accuracy. In addition, since the hole is formed by machining, the positioning hole 90 having a relatively large diameter can be formed with high accuracy.

  The present invention is not limited to the first embodiment and the second embodiment, and various modifications can be made without departing from the spirit of the invention. For example, in the first embodiment, the four convex portions 21, 22, 23, and 24 that are radially continuous are formed in the positioning hole forming portion 10, but the convex portions are not limited to four and are continuous in a radial manner. It can be formed into two or more other pluralities. Similarly, in the second embodiment, the number of convex portions is not limited to four, and can be formed in a plurality of other radially continuous portions. Further, in the second embodiment, the case where the cross-sectional shape of the convex portion is substantially V-shaped has been described as an example, but other shapes such as a U-shaped cross-section can be used.

It is a figure which shows the process for describing 1st Embodiment of this invention. It is principal part sectional drawing which shows the outline | summary of a shaping | molding process. It is a top view of a positioning hole formation part. It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. It is a perspective view of a positioning hole formation part. It is a perspective view of the positioning hole formation part in which the positioning hole was formed. It is a top view of the positioning hole formation part in which the positioning hole was formed. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is sectional drawing which shows a use condition. It is a top view of the positioning hole formation part in 2nd Embodiment of this invention. Similarly, it is a perspective view of a positioning hole forming part. It is a top view of the positioning hole formation part in which the positioning hole was formed. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is explanatory drawing of the conventional burring processing method. Similarly, it is explanatory drawing of the conventional burring processing method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal panel 2 Reference surface 10 Positioning hole formation part 11 Upper surface part 11A-11D Extension part 13-20 Side 21-21 Projection 13A-20A Vertical range 30 Positioning hole 31 Circumferential contact part 32 Axial contact part 40 Reference pin 51 Metal panel 52 Reference surface 60 Positioning hole forming portion 67 to 74 Side surface 81 to 84 Protruding portion 90 Positioning hole 91 Circumferential contact portion 92 Axial contact portion O Reference position a Axis d diameter S1 Molding step S2 Drilling step

Claims (7)

In the forming method of the positioning hole for positioning the metal panel by inserting the reference pin for positioning,
When forming the metal panel, the metal panel is provided with a plurality of protrusions that protrude radially from the reference surface of the metal panel around the virtual positioning position of the metal panel , and the protrusion has at least a side surface having an inclined range. A forming step of forming the positioning hole forming portion provided in the metal panel;
Drilling a positioning hole having a diameter including an inclined range of the side surface that is not parallel to the reference surface of each convex portion with an axis orthogonal to the reference surface as a center with respect to a preset positioning reference position of the metal panel A method for forming a positioning hole for a metal panel, comprising: In the forming method of the positioning hole for positioning the metal panel by inserting the reference pin for positioning,
When forming the metal panel, a plurality of extending portions are radially formed around the positioning virtual reference position of the metal panel, and an upper surface portion parallel to the reference surface of the metal panel and the side of each extending portion A molding step of forming a positioning hole forming portion on the metal panel having a vertical range perpendicular to the upper surface portion along the edge and having a side surface continuous with the reference surface;
A drilling step of drilling a positioning hole having a diameter including each of the extending portions and a vertical range around an axis perpendicular to the reference plane with respect to a preset positioning reference position of the metal panel. Metal panel positioning hole forming method. In the method of forming a positioning hole for positioning a metal panel by inserting a reference pin for positioning,
When forming the metal panel, a pair of side surfaces that are continuous through the respective ridgelines extending radially about the positioning virtual reference position of the metal panel and that are separated from each other as the metal panel moves to the reference surface side A molding step of molding the positioning hole forming portion having a plurality of convex portions formed by the metal panel,
And a drilling step of drilling a positioning hole having a diameter including each of the side surfaces and the reference surface with an axis perpendicular to the reference surface as a center with respect to a preset positioning reference position of the metal panel. Positioning hole forming method.   The said positioning hole is drilled by machining, The positioning hole shaping | molding method of the metal panel in any one of Claims 1-3 characterized by the above-mentioned. In the positioning hole structure for positioning the metal panel by inserting the reference pin for positioning,
Radially around the positioning virtual reference position of the metal panel, and the comprises a plurality of convex portions raised from the reference surface of the metal panel, and the positioning hole forming portion convex portion is provided with side surfaces having at least inclined range,
A positioning hole having a diameter including an inclination range that is not parallel to the reference surface of each of the convex portions with an axis perpendicular to the reference surface as a center with respect to the positioning reference position of the metal panel. Positioning hole structure. In the positioning hole structure for positioning the metal panel by inserting the reference pin for positioning,
A plurality of extending portions are radially formed around a virtual reference position for positioning the metal panel, and an upper surface portion parallel to the reference surface of the metal panel and a side edge of each extending portion are orthogonal to the upper surface portion. A positioning hole forming portion formed in the metal panel having a vertical range and a side surface continuous with the reference surface.
A positioning hole part structure for a metal panel, characterized by having a positioning hole having a diameter including each extension part and a vertical range centering on an axis perpendicular to the reference surface with a positioning reference position of the metal panel as a center. In the positioning hole structure for positioning the metal panel by inserting a reference pin for positioning,
The metal panel has a plurality of convex portions formed by a pair of side surfaces that are continuous with each ridge line extending radially from the virtual reference position and that move away from each other as the metal panel moves to the reference surface side. A positioning hole forming section;
A positioning hole portion structure for a metal panel, comprising a positioning hole having a diameter including each of the side surfaces and the reference surface with an axis orthogonal to the reference surface as a center with respect to a positioning reference position of the metal panel.

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