JP5896720B2 - Sealed forged molded product and manufacturing method thereof - Google Patents

Description

  The present invention relates to a forged product having a plurality of protrusions on both sides of a base plate and related technology.

  The forged molded product (100) shown in FIG. 13 has a plurality of pin-shaped protrusions (102) protruding in a plurality of rows on both sides of a base plate (101). The molded product having such a shape is formed by, for example, a closed forging method shown in FIG. That is, the lower mold (110) and the upper mold (111) are provided with recesses (112) (113) corresponding to the pin-shaped protrusions (102) of the molded product. Then, the upper mold (111) is dropped into the lower mold (110) loaded with the material (2), and the upper surface (114) and the upper mold (111) of the lower mold (110) are moved to the material (2). The pin-shaped protrusion (102) is raised by pushing, causing the material (2) to flow and extruding it into the recesses (112) (113).

  There are Patent Documents 1 to 4 regarding the closed forging method for forming such protrusions.

JP 2001-170734 A JP 2002-273540 A JP 2004-337935 A JP 2008-36700 A

  However, in the closed forging, the surface layer portion of the raw material (2) flows sufficiently, but the metal flow tends to stagnate at the central portion in the thickness direction. For this reason, a dead metal zone in which the material does not flow is generated in the central portion in the thickness direction, and the pin-shaped protrusion (102) is difficult to rise. For this reason, in the closed forging method, the higher the pin-like protrusion (102) of the molded product, the more difficult the processing. If a thick material (2) is used, it is possible to mold a high pin-shaped projection (102). However, since a dead metal zone is produced at the center in the thickness direction, the base plate (101) is thinned. I can't do it. In addition, even if the forging load is increased, it is difficult to mold to the target height, which causes the mold life to be shortened.

  In view of the above-described technical background, the present invention provides a forged product having a plurality of high protrusions on a thin base plate and related technology.

  That is, the present invention has the configurations described in [1] to [13] below.

[1] A plurality of protrusions are provided on both surfaces of the base plate, and the protrusions on one surface and the protrusions on the other surface are formed at positions facing each other through the base plate,
A forged product having a non-flat portion formed on a surface portion of the base plate excluding the protrusion.

  [2] The forged molded product according to item 1, wherein the non-flat portion is a concave-shaped meat stealing portion.

  [3] The forged molded product according to item 2, wherein the meat stealing portion is an annular groove formed so as to surround the protrusion.

  [4] The forged molded product according to item 2, wherein the meat stealing portion is a groove formed in a cross shape between the protrusion rows.

  [5] The forged molded product according to the above item 1, wherein the base plate is a corrugated plate in which peaks and valleys are alternately continued, and the non-flat portion is constituted by peaks and valleys.

  [6] The forged molded product according to any one of the above items 1 to 5, wherein the non-flat portions on both surfaces of the base plate are formed at positions facing each other through the base plate.

  [7] The base plate has a thickness (T) of 0.2 to 10 mm, the protrusion has a circumscribed circle diameter (D) of 0.5 to 10 mm, and a height (H) of 3 to 50 mm. The forged molded product according to any one of the preceding items 1 to 6, wherein the ratio (H / T) of the height (H) to the thickness (T) of the base plate is 0.6 to 250.

  [8] Any of the preceding items 2 to 4, 6, and 7, wherein the ratio (L / T) of the depth (L) of the meat stealing portion to the thickness (T) of the base plate is 0.2 to 0.45. Forged molded product according to crab.

  [9] The ratio (M / T) of the dimension (M) from the top of the crest to the bottom of the trough on one surface of the corrugated sheet is 0.5 to 0.9. The forged molded product according to any one of 5 to 7 above.

[10] Any of the preceding items 1 to 9, wherein the ratio (a ₁ / A) of the total area (a ₁ ) of the protrusions to the total area (A) in the plan view of the base plate is 0.1 to 0.6. Forged molded product according to crab.

[11] The ratio (a ₂ / a ₃ ) of the area (a ₂ ) of the non-flat portion in the surface portion excluding the protrusion and the area (a ₃ ) of the portion other than the non-flat portion in the plan view of the base plate 11. The forged molded product according to any one of 1 to 10 above, wherein is 0.3 or more.

[12] A molding die for hermetically forging the forged molded product according to any one of 1 to 11 above, having a lower mold and an upper mold,
There is a first protrusion forming recess for forming a protrusion on one surface of the forged product on the upper surface of the lower mold, and a non-flat portion is formed in the vicinity of the first protrusion forming recess. A first non-flat portion forming portion;
A second protrusion forming recess for forming a protrusion on the other surface of the forged product is formed on the lower surface of the upper mold at a position facing the first protrusion forming recess of the lower mold. A molding die, wherein a second non-flat portion forming portion for forming a non-flat portion is formed in the vicinity of the protrusion-forming recess.

  [13] A method for producing a forged molded product, comprising sealingly forging a metal material using the molding die according to item 12 above.

  The forged molded product according to the above [1] has a non-flat portion on the surface portion excluding the protrusions of the base plate. The non-flat portion is a trace of the material being pushed in by a die having a non-flat surface during forging, and indicates that the material flow was promoted to a deep portion in the thickness direction of the material during molding. Due to this good material flow, it is possible to raise a high protrusion and to form a thin base plate.

  The forged molded product according to the above [2] indicates that the non-flat portion is a concave-shaped meat stealing portion, and the meat stealing portion is formed by pressing a projection formed on a mold when the material is forged, It shows that the material flow was good. Accordingly, it is possible to form a high protrusion and to form a thin base plate.

  According to the forged product described in [3] above, since the flow behavior of the material is uniform in the circumferential direction by the annular groove (the meat stealing portion) surrounding the protrusion, the rising of the high protrusion is promoted. It is also effective for raising a plurality of protrusions to a uniform height.

  According to the forged molded product described in [4] above, the intersecting groove (the meat stealing portion) surrounds the protrusion, and the material flows in the entire area in the circumferential direction of the protrusion, so that the rising of the high protrusion is promoted. . It is also effective for raising a plurality of protrusions to a uniform height.

  According to the forged product described in [5] above, since the entire area of the surface portion excluding the protrusions of the base plate is a non-flat portion due to the corrugated sheet, the material flow is promoted throughout the entire area. Can be molded.

  According to the forged product described in [6] above, since the non-flat portions on both sides are formed at positions facing each other through the base plate, the fluidity of the material on both sides is uniform, and the protrusions are evenly raised. Be encouraged.

  According to the forged molded product described in [7] above, the molded product has thin and high protrusions on a thin base plate.

  According to each forged product described in [8] and [9], the fluidity of the material can be sufficiently promoted during forging.

  According to the forged product described in [10] above, a forged product in which a large number of protrusions are formed at a high density is obtained.

  According to the forged product described in [11] above, the material flow is sufficiently promoted and a high protrusion can be raised.

  According to the molding die described in [12] above, it can be used for producing the forged molded product described in [1] to [11].

  According to the invention described in [13] above, the forged product described in [1] to [11] can be manufactured.

It is a perspective view which shows one Embodiment of the forge molded product of this invention. It is sectional drawing of the forge molded product of FIG. 1A. It is sectional drawing which shows the metal mold | die for carrying out the closed forging of the forge molded product of FIG. 1A, and a formation process. It is a perspective view which shows the other example of the forge molded product of this invention. It is sectional drawing of the forge molded product of FIG. 3A. It is a top view of the forged molded product of FIG. 3A. It is a perspective view which shows the further another example of the forge molded product of this invention. It is sectional drawing of the forge molded product of FIG. 4A. It is a top view of the forged molded product of FIG. 4A. It is a perspective view which shows the further another example of the forge molded product of this invention. It is sectional drawing of the forge molded product of FIG. 5A. It is a perspective view which shows other embodiment of the forge molded product of this invention. It is sectional drawing of the forge molded product of FIG. 6A. It is sectional drawing which shows the metal mold | die for carrying out the closed forging of the forge molded product of FIG. 6A, and a formation process. It is a perspective view which shows the further another example of the forge molded product of this invention. It is a perspective view which shows the further another example of the forge molded product of this invention. It is a perspective view which shows the further another example of the forge molded product of this invention. It is a perspective view which shows the further another example of the forge molded product of this invention. It is a perspective view which shows the further another example of the forge molded product of this invention. It is a perspective view of the conventional forge molded product. It is sectional drawing which shows the metal mold | die for carrying out the closed forging of the forge molded product of FIG. 13, and a formation process.

[Forged products and manufacturing method thereof]
FIG. 1A is a perspective view showing an embodiment of a forged product according to the present invention, and FIG. 1B is a cross-sectional view thereof. FIG. 2 is a cross-sectional view schematically showing a molding die used for molding the forged product and a molding method using hermetic forging.

  The forged molded product (1) has nine cross-sectionally pin-shaped projections (11) formed on each of the upper and lower surfaces of a square base plate (10) at equal intervals in a cross arrangement of 3 rows x 3 rows. . The pin-shaped protrusions (11) on both sides are arranged at positions facing each other with the base plate interposed therebetween. The base plate (10) is provided with six hemispherical recesses (12) at equal intervals on a circle centered on each pin-shaped protrusion (11), and these hemispherical recesses (12) are pin-shaped. Surrounds the protrusion (11). The said hemispherical dent (12) is a non-flat part in the present invention and corresponds to a concave meat stealing part. In FIG. 1A, only five of the six hemispherical recesses (12) with respect to one pin-like protrusion (11) on the upper surface are shown, and one is hidden by the pin-like protrusion (11). This is not shown in the figure. Also, the pin-shaped protrusions (11) on the lower surface are formed by surrounding each pin-shaped protrusion (11) with six hemispherical recesses (12).

  As shown in FIG. 2, the molding die (20) includes a lower die (21) and an upper die (22). On the bottom of the material loading recess (23) of the lower mold (21), a deep recess (24) with a circular cross section corresponding to the pin-shaped protrusion (11) of the forged product (1) and a hemispherical recess (12) A hemispherical protrusion (25) corresponding to is formed. On the other hand, a deep recess (26) having a circular cross section corresponding to the pin-like protrusion (11) and a hemispherical protrusion (27) corresponding to the hemispherical recess (12) are formed on the lower surface of the upper mold (22). Yes. The deep recess (24) and the hemispherical protrusion (25) of the lower mold (21) correspond to the first protrusion forming recess and the first non-flat part forming portion of the present invention, and the upper mold (22) The deep recess (26) and the hemispherical protrusion (27) correspond to the second protrusion forming recess and the second non-flat portion forming portion of the present invention.

  Then, the flat material (2) is loaded into the material loading recess (23) of the lower mold (21), the upper mold (22) is dropped, and the material is flowed to increase the thickness of the material (2). The thin base plate (10) is formed while raising the pin-shaped protrusions (11) on both sides of the base plate (10) while extruding into the deep recesses (24) and (26) in both the front and rear directions. In this molding process, the hemispherical protrusions (25) and (27) of the lower mold (21) and upper mold (22) bite deep into the material (2) to promote the flow of the material to the center in the thickness direction, Raise the cylindrical protrusion (11). In addition, the flow is promoted to the center of the material (2), the dead metal zone that does not flow is eliminated or reduced as much as possible, and the base plate ( 10) is formed thin. In addition, since the material flows sufficiently and does not require an excessive load for molding, the mold life is extended and energy can be saved.

  Due to the above-mentioned closed forging, the forged molded product (1) has a hemispherical dent on the surface of the base plate (10) as a trace of the hemispherical projections (25) (27) of the lower mold (21) and upper mold (22) ( 12) is formed. That is, in the manufactured forged product (1), the formation of the hemispherical recess (12) on the surface of the base plate (10) indicates that the material flow was promoted during the closed forging, which is good It is shown that a high pin-like protrusion and a thin base plate can be formed by a simple material flow.

  On the other hand, the conventional forged product (100) shown in FIGS. 13 and 14 has a lower die (100) as apparent from the fact that the surface portion excluding the pin-like projections (102) of the base plate (101) is flat. ) And the portions (114) and (115) of the upper mold (11) except for the recesses (112) and (113) are flat surfaces, and the flat surfaces are pressed against the material (2) to flow. The flat surfaces (114) and (115) are less likely to bite into the material (2) than non-flat surfaces such as the protrusions (25) and (27), and the material is less likely to flow deeper, so the pin-shaped protrusions (102) are less likely to rise. . If the pin-like protrusion (102) is difficult to stand up, the base plate (101) is also less likely to be thin. Therefore, it is difficult to form a high pin-like protrusion and a thin base plate. Further, if an intended shape is to be obtained, an increase in load is required, which may shorten the mold life.

[Other examples of non-flat parts in forged products]
In the forged molded product of the present invention, the shape and arrangement of the non-flat portion are not limited to the form shown in FIGS. 1A and 1B, and the shape can be arbitrarily changed as long as the plastic flow of the material can be promoted. Hereinafter, the shape of the other non-flat portion will be described in detail with reference to the drawings. In addition, the code | symbol same as FIG. 1A-2 represents the same thing, and abbreviate | omits description.

  In the forged molded product (1) of FIGS. 1A and 1B, the shape of the recess (12) as the meat stealing portion is not limited to a hemispherical shape. Other concave shapes include a square cross section and a trapezoidal cross section. However, the hemispherical shape of the illustrated example is preferable in terms of ease of mold processing. The number and volume of the dents (12) are not limited, but as the total volume of the dents (12) increases, the amount of pushing into the material (2) increases and the material flow is promoted, so the pin-shaped protrusions (11) rise. easy.

  Further, in order to spend the material fluidized by the recess (12) for the rise of the pin-shaped protrusion (11), the position of the recess (12) is preferably close to the pin-shaped protrusion (11), and if it is in contact, it is even more preferable. Moreover, when it has a plurality of pin-shaped protrusions (11) as shown in the example, it is preferable that the material flow is uniform with respect to each protrusion (11), and the recesses (12 ) Are preferably equal in shape, volume and position. If the uniformity of the material flow is impaired, the height of the pin-shaped protrusion (11) may vary.

  The forged molded products (3), (4), and (5) of FIGS. 3A to 5B have a recessed stealed portion as a non-flat portion for promoting the flow of the material, similar to the forged molded product (1) of FIG. 1A. Formed.

  In the forged molded product (3) shown in FIGS. 3A and 3B, an annular groove (13) having a semicircular cross section is formed so as to surround the pin-shaped protrusion (11) as a non-flat portion (meat stealing portion). The annular groove (13) is particularly effective for rising of the pin-shaped protrusion (11) because the flow behavior of the material becomes uniform in the circumferential direction. Moreover, it is also effective for raising the plurality of pin-like protrusions (11) to a uniform height.

  The forged molded product (4) of FIGS. 4A and 4B has grooves (14) having a circular arc cross section formed between vertical and horizontal rows of pin-shaped protrusions (11) as non-flat portions (meat stealing portions). A half groove (15) is formed on the outside of the projection row by cutting the groove (14) at the center. By forming the groove (14) and the half groove (15) so as to intersect vertically and horizontally, all the pin-like protrusions (11) are surrounded by the groove (14) or the groove (14) and the half groove (15). It is. Such a cross arrangement of the groove (14) and the half groove (15) is particularly effective for the rising of the pin-shaped protrusion (11) because the material flows throughout the circumferential direction of the pin-shaped protrusion (11). Moreover, it is also effective for raising the plurality of pin-like protrusions (11) to a uniform height.

  The forged molded product (5) shown in FIGS. 5A and 5B has a non-flat portion (meat stealing portion) in which grooves (16) having inverted trapezoidal cross sections are formed between columns of pin-like projections (11), and longitudinal projections at both ends. A half groove (17) is formed outside the row by cutting the groove (16) at the center. By forming the groove (16) and the half groove (17) so as to intersect vertically and horizontally, all the pin-shaped protrusions (11) are sandwiched between the groove (16) or the groove (16) and the half groove (17). It is.

  The molding die for sealing these forged molded products (3), (4) and (5) is the same as the relationship between the forged molded product (1) and the molding die (20) in FIGS. In addition, an annular protrusion that forms an annular groove (13) at the required position of the lower mold and upper mold, or a groove (14), a half groove (15), a groove (16), and a half groove (17) are formed. A protruding ridge is formed. In closed forging, the annular protrusion or protrusion penetrates deeply into the material (2), causing the material to flow to the center in the thickness direction, causing the pin protrusion (11) to rise high, and a thin base plate Form (10).

  The forged molded product (6) of FIGS. 6A and 6B is formed of a corrugated plate in which ridges (31) and valleys (32) are alternately continuous over the entire base plate (30). Pin-shaped protrusions (11) are formed on both sides. Accordingly, all of the surface portions excluding the protrusions (11) of the base plate (30) are non-flat portions.

  FIG. 7 is a cross-sectional view schematically showing a molding die (40) used for molding the forged molded product (6) and a molding method using hermetic forging. The bottom of the material loading recess (23) of the lower mold (41) and the lower surface of the upper mold (42) are crests (43) (45) corresponding to the crests (31) of the forged product (6). The troughs (44) and (46) corresponding to the troughs (32) are alternately formed in a waveform, and the apexes of the respective crests (43) and (45) correspond to the pin-like protrusions (11). Deep recesses (47) (48) are provided. During forging, the lower die (41) and upper die (42) are deformed into a corrugated material (2) by combining peaks (43) (45) and valleys (44) (46). A metal flow is generated, and the material is pushed into the deep recesses (47) and (48) with such a wave-like flow, and the pin-shaped protrusion (11) rises. The deformation to the waveform is a deformation that occurs in the entire thickness direction of the material (2), and the material flows even in the central portion in the thickness direction. Therefore, the dead metal zone where the material does not flow is eliminated or reduced as much as possible. The base plate (30) can be formed thin by spending a lot of material for forming the pin-like protrusions (11). Since the material flow is promoted in the entire area of the surface portion excluding the protrusion (11), the high protrusion (11) and the thin base plate (30) are formed.

  Further, in the molding die (40) having such a shape, the upper mold (42) is recessed upward and the lower mold (41) is convex upward (43) (45). It is easy to fill the apex with material. In the forged molded product (6) of the illustrated example, the position of the pin-shaped protrusion (11) is set on the corrugated plate so that the filled material is poured into the deep recess (46) (47) and the high pin-shaped protrusion (11) is raised. Both sides of Yamabe (31). Moreover, since the flesh around the pin-shaped protrusion (11) becomes thick due to the filled material, it is preferable to form the pin-shaped protrusion (11) at the apex of the peak (31) from the viewpoint of strength.

  In the present invention, regardless of the shape of the non-flat portion, the push-in amount of the material increases as the total volume of the non-flat portion increases, so that the pin-shaped protrusion (11) easily rises. Further, in order to spend the material (12) fluidized by the non-flat part for the rise of the pin-shaped protrusion (11), it is preferable that the position of the non-flat part is close to the pin-shaped protrusion (11), and if it is in contact, Even more preferred. Moreover, when it has a plurality of pin-shaped protrusions (11) as in the illustrated example, it is preferable that the flow of the material (2) is uniform with respect to each protrusion (11), and non-flat with respect to each pin-shaped protrusion. It is preferred that the shape, volume and position of the parts are equal. In order to make the heights of the plurality of pin-like protrusions (11) uniform, it is effective to make the flow behavior to the pin-like protrusions (11) uniform.

  Further, since the forged molded product of the present invention is formed at a position where the pin-shaped protrusions on both sides face each other via the base plate, the non-flat portions on both sides are formed at a position facing each other via the base plate. It is preferable that the volume of the non-flat portion is equal on both sides. By equalizing the position and volume of the non-flat portions on both surfaces, the fluidity of the material on both surfaces can be made uniform, and the equal rising of the pin-shaped protrusions can be promoted.

  The material of the forged molded product of the present invention is not limited as long as it is a metal that can be hermetically forged, and examples thereof include aluminum, copper, alloys thereof, and composite materials of these metals and other materials. Among these, examples of materials suitable for hermetic forging include pure aluminum 1000 series alloys such as A1050 and A1100, A3003 and A6030, and copper alloys C1100.

  Further, the closed forging can be applied to any of room temperature forging, cold forging, and hot forging. In the case of aluminum, the range of room temperature to 500 ° C is preferable, and in the case of copper, the range of room temperature to 750 ° C is preferable.

[Suitable dimensions for forged products]
The forged molded product of the present invention does not limit the thickness of the base plate or the shape of the protrusions. However, according to the manufacturing method of the present invention, thin and high protrusions can be formed on the thin base plate. Significantly applicable to molded products. Specifically, as shown in FIGS. 1B, 3B, 4B, 5B, and 6B, the thickness (T) of the base plates (10) and (30) is 0.2 to 10 mm, and the circumscribed circle of the protrusion (11). The diameter (D) is 0.5 to 10 mm, the height (H) of the protrusion (11) is 3 to 50 mm, the height (H) of the protrusion (10) and the base plate (10) (30) It is preferably applied to a forged product having a ratio (H / T) with a thickness (T) of 0.6 to 250. Particularly preferred dimensions are the thickness (T) of the base plate (10) (30) of 0.5 to 5 mm, the circumscribed circle diameter (D) of the projection (11) of 1 to 5 mm, and the height of the projection (11). The height (H) is 3 to 7 mm, and the ratio (H / T) of the height (H) of the protrusion (10) to the thickness (T) of the base plates (10) and (30) is 1.5 to 14.

  Note that the thickness (T) of the base plate in the present invention is a concave portion of the stealing portion (12) (13) (14) (15) (16) in the flat plate shown in FIGS. 1B, 3B, 4B, 5B. In the base plate (10) on which (17) is formed, it is the plate thickness. The thickness (T) of the corrugated base (30) shown in FIG. 6B is the dimension from the highest vertex to the lowest bottom surface, that is, the distance from the surface on one side of the base plate to the surface on the other side. The distance from the peak of the peak (one surface of the base plate) to the peak of the valley (the other surface of the base plate). The plate thickness of the base plate (30) by the corrugated plate is not the thickness (t) of the thinnest portion referred to in FIG. 6B.

  Further, in order to sufficiently promote the material flow during forging and to ensure the strength of the base plate (10) after molding, the hemispherical recess (12), the annular groove (13), the groove (14) (16), The depth (L) of the half grooves (15) and (17), that is, the ratio (L / T) between the depth (L) of the meat stealing portion and the plate thickness is preferably in the range of 0.2 to 0.45. A range of 0.3 to 0.45 is preferable.

  In the base plate (30) formed of the corrugated plate shown in FIGS. 6A and 6B, one of the base plates is used to sufficiently promote material flow during forging and to ensure the strength of the base plate (30) after molding. The ratio (M / T) of the dimension (M) from the top of the peak (31) to the bottom of the valley (32) and the plate thickness (T) on the surface of the plate is preferably in the range of 0.5 to 0.9. In particular, a range of 0.7 to 0.9 is preferable.

  In addition, the number of protrusions is not limited, but a molded product having a large number of protrusions, which is difficult to form due to insufficient flow of the material in conventional closed forging, in other words, a molded article having a large area occupied by protrusions on the base plate Significance of application to

  FIG. 3C is a plan view of the forged molded product (3) of FIGS. 3A and 3B. In the plan view of the base plate (10), the portion occupied by the pin-like protrusions (11) is filled by cross-hatching, and the non-flat portion A portion occupied by a certain annular groove (13) is indicated by hatching, and the remaining flat portion (F) is indicated without being filled. The flat portion (F) is a portion other than the annular groove (13) (non-flat portion) in the surface portion excluding the pin-like protrusion (11), and is formed between the pin-like protrusion (11) and the annular groove (13). An annular region in between and an outer region of the annular groove (13).

  4C is a plan view of the forged molded product (4) of FIGS. 4A and 4B. Like FIG. 3C, the portion occupied by the pin-shaped protrusion (11) is filled by cross-hatching, and a groove ( 14) and the portion occupied by the half groove (15) are filled with hatching, and the remaining flat portion (F) is shown without filling. In this forged product (4), only the periphery of the pin-shaped protrusion (11) is the flat portion (F).

In the present invention, the surface portion excluding the protrusion is a portion obtained by combining the non-flat portion and the flat portion. Therefore, in the forged product (3) of FIG. 3C, the total area occupied by the pin-shaped protrusions (11) is a ₁ , the total area occupied by the annular groove (13) (non-flat part) is a ₂ , and the flat part (F the total area occupied by the) when the _{a 3,} total area a is expressed by _{a = a 1 + a 2 +} a 3. In the forged product (4) in FIG. 4C, the total area occupied by the grooves (14) and Hanmizo (15) is the total area a ₂ of the non-flat portion. In the present invention, the non-flat portion is a portion that exhibits the effect of increasing the fluidity of the material, and the portion other than the non-flat portion in the surface portion excluding the protrusion is a portion that does not exhibit the effect of enhancing the fluidity of the material. Point to. Therefore, the portion other than the non-flat portion may include a portion that is not flat but does not contribute to the improvement of the fluidity of the material in addition to the flat portion. In the forged products (3) and (4), only the flat part (F) corresponds to “a part other than the non-flat part”.

Please refer to FIG. 3C and FIG. 4C. The present invention is a forged molded product in which the ratio (a ₁ / A) of the total area (a ₁ ) of the protrusions to the total area (A) is 0.1 to 0.6, in other words, a large number of protrusions are formed at a high density. It can apply suitably with respect to the forged molded product made. A forged molded product having a small occupation area ratio of protrusions with a ₁ / A of less than 0.1 is relatively easy to mold, and therefore, the significance of applying the present invention is small. In addition, a forged molded product having a ₁ / A exceeding 0.6 and a large occupation area ratio of protrusions inevitably reduces the area (a ₂ ) of the non-flat portion, so that the fluidity may be insufficient. The ratio (a ₁ / A) of the total area (a ₁ ) of the protrusions to the particularly preferable total area (A) is 0.1 to 0.5.

Further, in order to sufficiently flow the material, the ratio (a ₂ / a ₃ ) of the area (a ₂ ) of the non-flat part in the surface portion excluding the protrusion and the area (a ₃ ) of the part other than the non-flat part Is preferably 0.3 or more. If a ₂ / a ₃ is less than 0.3, there are few non-flat parts and the fluidity may be insufficient. A preferable ratio (a ₂ / a ₃ ) is 0.4 or more. Further, there may be no portion other than the non-flat portion, and the entire area of the surface portion excluding the protrusion may be the non-flat portion. In the forged product (6) of FIGS. 6A and 6B, since the base plate (30) is a corrugated plate, the entire region of the surface portion excluding the pin-like protrusions (11) is a non-flat portion.

[Other shapes of forged products]
The present invention does not limit the shape of the protrusions to the pin-like protrusions (11) shown in FIG. 1A or the like, and the arrangement thereof is not limited to the equidistant cross array. The protrusion may be a ridge having a large aspect ratio in addition to a pin shape in which the aspect ratio of the cross section approximates to 1. The cross-sectional shape of the protrusion is not limited to a circle, and examples thereof include an arc, an ellipse, a polygon, and an irregular shape. In addition, the plurality of protrusions are included in the present invention regardless of how they are arranged, such as a single row arrangement, a staggered arrangement, a circular arrangement, a plurality of concentric arrangements, and a random arrangement. However, since uniform material flow is advantageous for forming high protrusions, it is preferable that a plurality of protrusions be regularly arranged at equal intervals. Further, the planar shape of the base plate is not limited, and examples thereof include a square base plate (10) shown in FIG. 1A, a circular shape, an elliptical shape, a polygonal shape, an indefinite shape, and the like. In addition, forged molded products in which an additive such as a frame or a rib is formed on the base plate are also included in the present invention.

  8 to 12 show other examples of shapes of forged products.

  The forged product (50) of FIG. 8 is formed by forming a protrusion (51) having the same size as the width of the base plate (10) as a protrusion on a rectangular base plate (10). Further, a groove (52) having a semicircular cross section is provided as a non-flat portion (meat stealing portion) between and outside these protrusions (51). In the forged product (53) of FIG. 9, a plurality of cylindrical protrusions (55) are divided into two blocks on both sides of a rectangular base plate (54) and arranged in a staggered pattern, and a frame is formed around the base plate (54). The body (56) is formed. The forged molded product (57) of FIG. 10 has a large number of pin-like protrusions (11) arranged in a staggered manner on both sides of the horizontal plate (59) of the H-shaped base (58). The forged molded product (60) in FIG. 11 is a product in which protrusions (62), (63), (64), and (65) having L-shaped cross sections are arranged on both sides of a rectangular base plate (61). The forged molded product (66) in FIG. 12 is a circular base plate (67) with protrusions (68) (69) (70) (71) (72) on both sides concentrically arranged on both sides. is there.

  In addition, in the forged molded products (53), (57), (58), and (59) in FIGS. 9 to 12, illustration of non-flat portions is omitted in order to clarify the shapes of the protrusions and the appendages. These forged molded products (53), (57), (58), and (59) include non-flat portions (12), (13), (14), and (15) shown in FIGS. 1A, 3A, 4A, 5A, and 6A. ) (16) (17) (31) (32) or other non-flat portions are appropriately formed.

  Forged molded products (1), (3), (4), (5), and (6) in which protrusions are arranged in a cross shape, referred to in FIGS. 1A to 6B as Examples 1 to 5, are hermetically forged. Forged molded product (100) to be sealed was forged. The forged molded product in the illustrated example has 9 pin-like projections (11) (102) arranged in a 3 × 3 cross shape, but in this forging test, 16 pin-like projections (11) (102). A 4 × 4 cross array was hermetically forged. These test forged molded products (1), (3), (4), (5), (6), and (100) are base plates (10), (30), and (101) having a square size of 50 mm × 50 mm, The diameter (D) of the pin-shaped protrusions (11) and (102) is 5 mm, and the distance between the centers of the adjacent pin-shaped protrusions (11) and (102) is 12 mm in common. Further, the height (H) of the pin-shaped protrusions is 7 mm in Examples 1 to 4 and Comparative Example, and 7.5 mm in Example 5. The form of the non-flat part is different.

  The forging material (2) is commonly a 50 mm × 50 mm flat plate made of aluminum, and a forging material having a thickness of 3.7 to 6 mm was used depending on the volume of the molded product. Forging conditions were common and the forging temperature was 200 ° C.

  Table 1 shows the shapes of the forged molded products (1), (3), (4), (5), (6), and (100) of each example, as well as the dimensions of the non-flat part, the height of the protrusions, and the thickness of the base plate. The ratio, the area of each part in the plan view of the base plate, and the area ratio are shown.

  For each example, 10 forging products were hermetically forged, and the manufactured forging products were evaluated according to the following criteria. The evaluation results are shown in Table 1.

◎: The target projection height was almost obtained. ○: The projection height was slightly varied but good projection height was obtained. △: Although the projection height variation was larger than ○, it was almost good. Protrusion height was obtained ×: Variation in protrusion height was large

  From Table 1, it was confirmed that a high protrusion can be formed by forming the non-flat portion and the thickness of the base plate can be reduced.

  The present invention can be suitably used for a forged product having high protrusions on both sides of a thin base plate.

1, 3, 4, 5, 6, 50, 53, 57, 60, 66 ... Forged products
2… Material
10, 30, 54, 59, 61, 67 ... Base plate
30 ... Base plate (corrugated plate)
11… Pin-shaped protrusion (protrusion)
12… Hemispherical dent (non-flat part, meat stealing part)
13 ... annular groove (non-flat part, meat stealing part)
14, 16, 52 ... groove (non-flat part, meat stealing part)
15, 17 ... Half groove (non-flat part, meat stealing part)
20, 40 ... Mold for molding
21, 41, 110 ... Lower mold
22, 42, 43 ... Upper mold
51 ... Projections
55… Cylindrical protrusion (protrusion)
62, 63, 64, 65 ... L-shaped projections (projections)
68, 69, 70, 71, 72 ... Projection with a circular arc section (projection)
F: Flat part (part other than the non-flat part in the surface part excluding the protrusion)
H ... Projection height D ... Projection circumscribed circle diameter L ... Meat stealing part depth M ... Dimension from peak to peak of valley on one side

Claims (13)

The base plate has a plurality of protrusions on both sides, and the protrusion on one surface and the protrusion on the other surface are formed at positions facing each other through the base plate,
Sealed forged product, wherein the non-flat portion is formed on the surface portion excluding the projection of the base plate. The hermetic forged molded product according to claim 1, wherein the non-flat portion is a concave meat stealing portion. The hermetic forging product according to claim 2, wherein the meat stealing portion is an annular groove formed around the protrusion. 3. The hermetic forged product according to claim 2, wherein the meat stealing portion is a groove formed in a cross shape between the protrusion rows. The hermetic forged product according to claim 1, wherein the base plate is a corrugated plate in which crests and troughs are alternately continued, and the non-flat portion is constituted by crests and troughs. The hermetic forged molded product according to any one of claims 1 to 5, wherein non-flat portions on both surfaces of the base plate are formed at positions facing each other with the base plate interposed therebetween. The base plate has a thickness (T) of 0.2 to 10 mm, the protrusion has a circumscribed circle diameter (D) of 0.5 to 10 mm, a height (H) of 3 to 20 mm, and the height of the protrusion ( The hermetic forged product according to any one of claims 1 to 6, wherein a ratio (H / T) of H) to a thickness (T) of the base plate is 0.6 to 250. The ratio (L / T) between the depth (L) of the meat stealing portion and the plate thickness (T) of the base plate is 0.2 to 0.45. Sealed forged molded product as described. The ratio (M / T) of the dimension (M) from the peak of the peak to the bottom of the valley on one surface of the corrugated sheet and the thickness (T) is 0.5 to 0.9. Sealed forged molded product according to any one of -7. The ratio (a ₁ / A) of the total area (a ₁ ) of the protrusions to the total area (A) in a plan view of the base plate is 0.1 to 0.6. Sealed forged molded product as described. In a plan view of the base plate, the ratio (a ₂ / a ₃ ) between the area (a ₂ ) of the non-flat portion in the surface portion excluding the protrusion and the area (a ₃ ) of the portion other than the non-flat portion is 0. It is 3 or more, The closed forging molded product in any one of Claims 1-10. A molding die for hermetically forging the hermetic forged molded product according to any one of claims 1 to 11, comprising a lower die and an upper die,
In order to form a first protrusion forming recess for forming a protrusion on one surface of the hermetic forged molded product on the upper surface of the lower mold, and to form a non-flat portion in the vicinity of the first protrusion forming recess. A first non-flat portion forming portion,
On the lower surface of the upper mold, a second protrusion forming recess for forming a protrusion on the other surface of the hermetic forged molded product is formed at a position facing the first protrusion forming recess of the lower mold. 2. A molding die characterized in that a second non-flat portion forming portion for forming a non-flat portion is formed in the vicinity of a recess for forming two protrusions. A method for producing a hermetic forged molded product, comprising hermetically forging a metal material using the molding die according to claim 12.

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