JP5641831B2 - Extrusion dies for semi-hollow shape manufacturing - Google Patents

Description

  The present invention relates to an extrusion die for producing a semi-hollow shape material used when producing a semi-hollow shape material by extrusion, and a related technique.

  In the present specification, upstream and downstream mean upstream and downstream with respect to the extrusion direction, respectively.

  In order to produce a semi-hollow section having a substantially C-shaped cross section having a slit-like tong opening (peripheral wall opening) along the length direction on the peripheral wall by extrusion, a method using a solid die or a horodice is used. The method is well known.

  As shown in Patent Document 1, a solid die is provided with a forming hole (bearing hole) for forming a semi-hollow profile at the center thereof. Inside this forming hole, a tong part forming part for forming a tongue part which is a space of the semi-hollow shape material is arranged, and this tong part forming part forms a tong opening for the semi-hollow shape material. It is integrally connected to the outer periphery of the die at the opening forming part (cantilever support part).

  Further, as shown in Patent Document 2, the horodice is composed of a combination of a female port plate and a male hole plate, and an annular molding hole (bearing hole) is formed by a gap between the bearing portions of both plates. A bridge piece for opening molding is provided in such a manner that a part of the molding hole is closed while being formed. The hole plate includes a weld chamber provided corresponding to the molding hole, and a plurality of metal holes penetrating from the upstream side to the weld chamber and provided in the circumferential direction at intervals, and passes through each metal hole. The molding material introduced into the weld chamber passes through the molding hole.

JP 2000-176536 A JP-A-63-16809

  However, as shown in the above-mentioned Patent Document 2, when a semi-hollow shape material is manufactured using a holrodice or the like having a hole plate, the flow rate of the molding material in the weld chamber may vary. For example, the weld chamber The flow rate of the molding material in the portion corresponding to the metal hole inside may be higher than the flow rate of the molding material in the portion corresponding to the bridge between the adjacent metal holes. For this reason, the flow rate of the molding material introduced from the upstream end surface (front surface) of the molding hole varies depending on the position of introduction to the molding hole, and the molding material has a uniform flow rate over the entire upstream end surface of the molding hole. Molding material may not be introduced. In some cases, twisting occurs in the shape product, and it is difficult to obtain a high-quality semi-hollow shape.

  This invention is made | formed in view of said subject, and it aims at providing the extrusion die for semi-hollow shape materials which can manufacture a high quality semi-hollow shape material, and its related technique.

  In order to solve the above problems, the present invention comprises the following means.

[1] Molding hole for molding a semi-hollow shape member, a tongue portion molding portion for molding a tongue portion of the semi-hollow shape member, a tongue opening portion molding portion for molding a tongue opening portion of the semi-hollow shape material, and the molding A weld chamber provided on the upstream side of the hole, a plurality of metal holes penetrating along the extrusion direction from the upstream side to the weld chamber and spaced apart in the circumferential direction, and adjacent metal holes in the circumferential direction. An extrusion die for producing a semi-hollow shape member, wherein the molding material introduced from the plurality of metal holes passes through the molding hole through the weld chamber,
When viewed from the upstream side along the extruding direction, the distance from the one end blocking portion on the upstream end surface of the molding hole to the wall surface of the nearby bridge is the other end blocking portion on the upstream end surface of the molding hole. An extrusion die for producing a semi-hollow shape material, which is set to be substantially equal to the distance from the wall surface of the nearby bridge to the wall surface.

  The extrusion die according to the present invention includes a region corresponding to the metal hole, a region corresponding to the bridge, and a region corresponding to the bridge wall surface in the front view state. , Are arranged in any one area.

  [2] When the distance from the closed end of the molding hole to the nearby bridge wall is “Da”, and the distance from the closed end of the other end to the nearby bridge wall is “Db”, Db / Da is 0.9. The extrusion die for producing a semi-hollow profile according to the preceding item 1, which is set to ~ 1.1.

  [3] The extrusion die for producing a semi-hollow shape material according to item 1 or 2, wherein the forming hole is formed in a non-axisymmetric shape in a front view state.

  [4] In a front view state, the distance from the one end closed portion of the forming hole to the axis of the die body is substantially equal to the distance from the other end closed portion of the forming hole to the axis of the die body. 4. The extrusion die for producing a semi-hollow shape material according to any one of items 1 to 3, which is set.

[5] A die body and a hole plate provided upstream thereof are provided separately.
The molding hole, the tongue part molding part, and the tongue opening part molding part are provided in the die body,
The extrusion die for producing a semi-hollow shape member according to any one of the preceding items 1 to 4, wherein the weld chamber, the metal hole, and the bridge are provided in the hole plate.

  [6] The extrusion die for manufacturing a semi-hollow shape member according to item 5, wherein a dummy forming portion is provided in the weld chamber in the hole plate corresponding to the upstream side of the tongue portion forming portion of the die body.

  [7] The extrusion die for manufacturing a semi-hollow shape member according to [6], wherein the dummy molding part is in an unfixed state with respect to the tongue part molding part.

[8] A portion surrounded by the plurality of metal holes in the hole plate is configured as an axial center portion,
8. The extrusion die for producing a semi-hollow shape material according to item 6 or 7, wherein the dummy molding portion is provided at a downstream end portion of the shaft center portion.

  [9] The extrusion die for producing a semi-hollow shape member according to any one of items 6 to 8, wherein the dummy molded part is disposed in contact with the tongue part molded part.

  [10] The extrusion die for manufacturing a semi-hollow shape member according to any one of items 6 to 9, wherein the dummy molding part is arranged in a state of being separated from the tongue part molding part.

[11] An apparatus for producing a semi-hollow profile comprising an extrusion die for extruding an extruded material to produce a semi-hollow profile,
The said extrusion die is comprised by the extrusion die for semi-hollow shape material manufacturing of any one of preceding clauses 1-10, The manufacturing apparatus of the semi-hollow shape material characterized by the above-mentioned.

  [12] A semi-hollow profile is produced by extruding an extruded material using the extrusion die for producing a semi-hollow profile described in any one of 1 to 10 above. Semi-hollow shape manufacturing method.

  According to the extrusion die for producing a semi-hollow shape member of the invention [1], the flow rate between the molding material flowing from the one end closing portion side and the molding material flowing from the other end closing portion side at the upstream end face of the forming hole is almost equal. Therefore, it is possible to prevent the molding material from flowing in and passing through the entire area of the molding hole at a uniform flow rate, and to prevent problems such as twisting in the shape product, and to obtain a high-quality semi-hollow shape material reliably. be able to.

  According to the extrusion die for producing a semi-hollow shape member of the invention [2], the above effect can be obtained more reliably.

  According to the extrusion die for producing a semi-hollow profile of the invention [3], a high-quality semi-hollow profile having a non-symmetrical cross section and free from defects such as torsion can be reliably produced.

  According to the extrusion die for producing a semi-hollow profile of the invention [4], the above effect can be obtained more reliably.

  According to the extrusion die for producing a semi-hollow shape member of the invention [5], since the bearing portion for determining the product shape is formed on the die body side, the position adjustment between the inner peripheral side and the outer peripheral side bearing portion is performed. Thus, the dimensional accuracy and shape of each bearing part can be easily and accurately managed, and a high-quality semi-hollow shape can be easily and reliably manufactured.

  According to the extrusion die for producing a semi-hollow shape material of the invention [6], since the dummy molding part is provided on the upstream side of the tongue part molding part, the extrusion material flows on the outer peripheral side of the dummy molding part during the extrusion process. As a result, the extruded material does not come into pressure contact with the main part of the tongue part molding part, and the extrusion load acting on the tongue part molding part is reduced. For this reason, the possibility that the tongue opening molded portion is damaged by the extrusion load can be kept low, and the durability can be improved.

  According to the extrusion die for producing a semi-hollow shape member of the invention [7], even if the hole plate is bent by the extrusion load and the dummy molding part is displaced, the adverse effect due to the displacement reaches the tongue part molding part. The durability can be further improved.

  According to the extrusion die for producing a semi-hollow shape member of the invention [8], the dummy molded portion can be reliably formed at an appropriate position, and the above-described effect can be obtained more reliably.

  According to the extrusion die for producing a semi-hollow profile of the invention [9], since the dummy molded part is in contact with the tongue part molded part, it is ensured that the extruded material enters between the dummy molded part and the tongue part molded part. It is possible to prevent problems caused by the intrusion.

  According to the extrusion die for producing a semi-hollow shape member of the invention [10], since the gap is formed between the dummy forming part and the tongue part forming part, the hole plate is bent by the extrusion load, and the dummy is formed. Even if the molding part is pushed downstream, it is possible to effectively prevent the dummy molding part from coming into pressure contact with the tongue part molding part. For this reason, a great load is not applied to the tongue part molding part, damage to the tongue opening part molding part can be reliably prevented, and durability can be further improved.

  According to the semi-hollow shape manufacturing apparatus of the invention [11], similar effects can be obtained as described above.

  According to the semi-hollow shape manufacturing method of the invention [12], the same effect can be obtained as described above.

FIG. 1 is a sectional view showing an extrusion processing apparatus to which an extrusion die according to an embodiment of the present invention is applied. FIG. 2 is a cross-sectional view showing the extrusion die of the embodiment. FIG. 3 is an enlarged cross-sectional view of the periphery of the dummy forming portion in the extrusion die of the embodiment. FIG. 4 is an exploded perspective view showing the extrusion die of the embodiment. FIG. 5 is a front view of the extrusion die of the embodiment as viewed from the upstream side. FIG. 6 is a front view of the die body applied to the extrusion die of the embodiment as seen from the upstream side. FIG. 7 is a rear view of the hole plate applied to the extrusion die of the embodiment as viewed from the downstream side. FIG. 8 is a cross-sectional view showing a semi-hollow shape member manufactured by the extrusion processing apparatus of the embodiment. FIG. 9 is a front view showing the positional relationship between the bridge and the forming hole in the extrusion die of the embodiment. FIG. 10 is an enlarged front view showing the periphery of the closed portion of both ends of the forming hole in FIG. FIG. 11A is a front view showing the positional relationship between bridges and forming holes in an extrusion die which is a first modification of the present invention. FIG. 11B is a front view showing the positional relationship between bridges and forming holes in an extrusion die which is a second modification of the present invention. FIG. 11C is a front view showing the positional relationship between bridges and forming holes in an extrusion die which is a third modification of the present invention. FIG. 11D is a front view showing a positional relationship between bridges and forming holes in an extrusion die which is a fourth modification of the present invention. FIG. 12A is a front view showing a positional relationship between bridges and forming holes in an extrusion die as a first reference example that departs from the gist of the present invention. FIG. 12B is a front view showing a positional relationship between a bridge and a forming hole in an extrusion die as a second reference example that departs from the gist of the present invention.

  FIG. 1 is a sectional view showing an extrusion apparatus 10 to which an extrusion die 1 according to an embodiment of the present invention is applied. As shown in the figure, this extrusion processing device (semi-hollow shape material manufacturing device) 10 is of a direct extrusion processing type, including the extrusion die 1 of this embodiment, in addition to the container 11 and the stem 12. Etc. are provided.

  As shown in FIG. 8, the semi-hollow shape member 8 manufactured by the extrusion processing apparatus 10 has a lip groove shape (lip channel shape), and has a substantially C-shaped cross-section with a high tong ratio. Is formed.

  The material of the semi-hollow shape member 8 is a metal, and in this embodiment, aluminum (including an alloy thereof, the same applies hereinafter).

  The semi-hollow shape member 8 is provided with a tong portion (void portion) 82 provided on the inner side and extending in the length direction (extrusion direction E), and a slit-like tong provided on the outer peripheral wall and extending in the length direction. An opening (peripheral wall opening) 83 is provided, and the tongue 82 is opened to the outside through the tongue opening 83.

  As shown in FIGS. 1-7, the extrusion die 1 of this embodiment is equipped with the die main body 2 arrange | positioned downstream with respect to the extrusion direction E, and the hall | plate plate 5 arrange | positioned upstream. Yes. As will be described in detail later, the hole plate 5 does not have a bearing portion and does not function as a die (male), but for convenience, the die body 2 is referred to as a female die and the hole plate 5 is referred to as a male die. There is also.

  The die body 2 of the extrusion die 1 is provided with a molding hole 3 for molding the semi-hollow shape member 8 in the center thereof so as to penetrate in the extrusion direction E. The cross-sectional shape of the forming hole 3 is formed in a substantially C shape having a shape corresponding to the cross-sectional shape of the semi-hollow profile 8 to be manufactured.

  In the present embodiment, the die body 2 is configured such that all bearing parts such as the inner peripheral side bearing part 31 and the outer peripheral side bearing part 32 constituting the molding hole 3 are set in the die main body 2 and are formed as solid dies. It can also be captured.

  On the radially inner side of the molding hole 3 of the die body 2, a tongue portion molding portion 22 for molding the tongue portion 82 of the semi-hollow shape member 8 is disposed. The tongue opening 83 is integrally connected to the outer peripheral portion 21 of the die body 2 at the tongue opening forming portion 23 for forming the tongue opening 83. Therefore, the tongue part molding part 22 is supported in a cantilever manner on the die body outer peripheral part 21 via the cantilever support part as the tongue opening molding part 23. In addition, the tongue opening part molding part 23 can also be regarded as a proximal end constriction part of the tongue part molding part 22.

  Here, in the present embodiment, a portion of the upstream end surface (upstream end portion) of the die body 2 that is blocked by the tongue opening molding portion 23 is blocked at both ends of the upstream end surface of the molding hole 3. The parts 35a and 35b are defined. In other words, the tongue opening molding portion 23 is formed by the region between the both-end blocking portions 35a, 35b of the molding hole 3 in the die body 2.

  The upstream end surface (front surface) of the tongue portion molding portion 22 is formed on a flat surface orthogonal to the axial direction (extrusion direction E). The cross-sectional shape (front shape) of the tongue portion molding portion 22 is formed in a substantially rectangular shape (square shape) having a large curvature radius at the corner corresponding to the cross-sectional shape of the tongue portion 82 of the semi-hollow shape member 8. .

  Further, on the outer peripheral edge portion of the upstream end surface (front surface) of the die body 2, a fitting convex edge portion 29 that protrudes upstream is formed continuously in the circumferential direction.

  On the other hand, the hall plate 5 includes a weld chamber 51 on the downstream side (back side), and the weld chamber 51 is opened to the downstream side. Further, the hole plate 5 is formed with a metal hole 55 having an upstream end opened to the upstream end face (front) of the hole plate 5 and a downstream end opened to the weld chamber 51. The cross-sectional shape (front view shape) of the metal hole 55 is formed in a substantially 1/4 circle, and four metal holes 55 are formed at equal intervals in the circumferential direction.

  Needless to say, in the present invention, the number of metal holes 55 is not limited to four, and any number of metal holes 55 may be formed as long as it is two or more.

  The region between each of the four metal holes 55 is configured as a bridge 53..., And adjacent metal holes 55 and 55 are partitioned by the bridge 53.

  A portion surrounded by the four metal holes 55 in the hall plate 5 is configured as an axial center portion 50 disposed along the axial center. The downstream end of the axial center 50 is provided with a protrusion 61 that protrudes in the downstream direction, and the tip (downstream end) of the protrusion 61 has a rectangular shape in the rear view. It is formed as a dummy molding part 6. The dummy forming portion 6 corresponds to the position of the tongue portion forming portion 22 of the die body 2 and is disposed in a state of facing the tongue portion forming portion 22. The portion 22 is formed in a substantially similar shape.

  Here, when the hole plate 5 of the present embodiment provided with the dummy forming portion 6 is compared with a hole plate of a well-known port hole die (holodais), the dummy forming portion 6 of the present embodiment has a well-known hole. Although it is arranged at the same position as the male die (mandrel) in the plate, it does not have a bearing part (inner peripheral side bearing part) that determines the product shape of the semi-hollow shape member 8, but an inner peripheral bearing part. The tongue part forming part 22 is formed separately. That is, although this dummy forming part 6 is arranged at the position of the male die, it does not function as a male die and can be regarded as a dummy of the male die.

  In addition, as will be described in detail later, the dummy forming portion 6 of the present embodiment mainly controls the flow (metal flow) of the extruded material 81 and adjusts the pressure to the tong portion forming portion 22 during the extrusion process. It may be called a flow control unit or a pressure control unit.

  The downstream end surface (tip surface, back surface) of the dummy forming part 6 is formed as a flat surface orthogonal to the axial direction (extrusion direction E). Further, the cross-sectional shape (back surface shape) of the dummy forming portion 6 corresponds to the cross-sectional shape (front shape) of the tongue portion forming portion 22 of the die body 2 and is substantially rectangular (square shape) having a large curvature radius at the corner. Is formed.

  Further, the dummy molding portion 6 is formed slightly smaller than the tongue portion molding portion 22 in a front view state. Specifically, in the state of front view or rear view, the ratio (percentage) of the area of the downstream end face (back face) of the dummy forming part 6 to the area of the upstream end face (front face) of the tong part forming part 22; In other words, the ratio (the concealment ratio) at which the front surface of the tongue forming part 22 is concealed by the back surface of the dummy forming part 6 is preferably set to 60 to 97%, and more preferably set to 75 to 95%. Is good. That is, when the concealment ratio of the tongue forming part 22 by the dummy forming part 6 is too small, as will be described later, it is not possible to sufficiently reduce the extrusion load on the tongue forming part 22 during the extrusion process. There is a high possibility that the tongue opening molding portion 23 is damaged by the extrusion load, and the durability may be lowered. On the contrary, when the concealment ratio by the dummy forming part 6 is too large, as will be described later, it becomes difficult to appropriately control the metal flow at the time of extrusion, and it becomes difficult to perform stable extrusion. There is a fear.

  However, in the present invention, when only the pressure reducing effect of the tongue forming part 22 is regarded as important, the concealing rate of the tongue forming part 22 by the dummy forming part 6 is set to 100% or more, that is, the back surface of the dummy forming part 6. You may make it form a shape larger than the front shape of the tongue part shaping | molding part 22. FIG. Furthermore, if the concealment rate is set to 105% or more, the pressure reduction effect is further enhanced.

  Here, as shown in FIG. 6, in the present embodiment, the boundary line between the tongue portion molding portion 22 and the tongue opening portion molding portion 23 is an imaginary straight line connecting both end portions of the inner peripheral side bearing portion 31 of the molding hole 3. L. Therefore, the virtual straight line L and the inner peripheral bearing portion 31 specify the contour line (outer peripheral shape) of the tongue portion molding portion 22, and the region surrounded by the contour line is the region of the tongue portion molding portion 22. Thus, the area of this region becomes equal to the area of the front surface of the tongue portion molding portion 22.

  Further, as shown in FIG. 6, when the tongue length (the length of the imaginary straight line L) is “W” and the front area of the tongue portion molding portion 22 is “St”, the tongue ratio T is (tongue portion molding portion). It is obtained by the front area St) / (tongue length W). And this invention can be suitably employ | adopted for the extrusion die of the high tong ratio whose tong ratio T is 4 or more (T> = 4).

  Moreover, in this embodiment, the space | interval of the back surface outline in the dummy shaping | molding part 6 and the front outline in the tongue part shaping | molding part 22 is set to the fixed distance over the perimeter, and the back surface shape of the dummy shaping | molding part 6 is set. The (peripheral shape) is formed in a substantially similar shape to the front shape (peripheral shape) of the tongue part molding part 22. Specifically, in the front view state, when the outer peripheral shape of the dummy molding portion 6 is the contour line of the tongue portion molding portion 22 (inner peripheral side bearing portion 31 of the molding hole 3) as the base point row, It becomes a shape constituted by an inner contour line in a collection of equidistant circles centered on each base point. That is, the outer peripheral shape of the dummy forming part 6 is a shape constituted by equidistant lines with the contour line of the tongue forming part 22 as a base line.

  Furthermore, the back surface (downstream side end surface) of the dummy molding part 6 and the front surface (upstream side end surface) of the tongue part molding part 22 are arranged substantially in parallel.

  A fitting concave step portion 59 is continuously formed in the circumferential direction corresponding to the fitting convex edge portion 29 of the die body 2 on the outer peripheral edge portion of the downstream end surface (back surface) of the hall plate 5. Yes.

  Then, the die body 2 and the hole plate 5 are combined in such a manner that the fitting convex edge portion 29 of the die body 2 is fitted into the fitting concave step portion 59 of the hole plate 5 having this configuration. The extrusion die 1 of this embodiment is manufactured.

  As shown in FIG. 3, in the extrusion die 1 of this embodiment assembled in this way, a gap 20 is formed between the back surface of the dummy molding portion 6 and the front surface of the tongue portion molding portion 22. The lower limit value of the width dimension S2 of the gap 20 is preferably set to 0.1 mm, and the upper limit value of the width dimension S2 of the gap 20 is set equal to the width dimension (bearing width) S1 of the forming hole 3. Is more preferable. That is, it is preferable that the relationship of 0.1 mm ≦ “S2” ≦ “S1” is satisfied. Needless to say, the width dimension (bearing width) S1 of the molding hole 3 is equal to the thickness (thickness) dimension of the semi-hollow profile 8.

  Here, when the width dimension S2 of the gap 20 is too small, when the hole plate 5 is bent by the extrusion load applied to the hole plate 5 at the time of extrusion, the dummy forming portion 6 of the hole plate 5 becomes the die body. There is a possibility that a large load is applied to the tong portion molding portion 22 and the tong opening molding portion 23 is likely to be damaged by the load. On the contrary, when the width dimension S2 is too large, that is, when the width dimension S2 exceeds the width dimension S1 of the molding hole 3, the extruded material (metal) 81 constituted by the billet becomes the dummy molding part 6 and the tongue part molding part. It becomes easy to enter the gap 20 between 22. If the extruded material 81 enters the gap 20 and bites the extruded material 81, the dummy molded portion 6 is inserted through the extruded material 81 when the hole plate 5 is bent by the extrusion load. , The tongue portion molding portion 22 is bent and the tongue opening portion molding portion 23 is likely to be damaged.

  Further, in the extrusion die 1 of the present embodiment, the dummy molding part 6 and the tongue part molding part 22 are not mechanically connected and fixed by bolts, screws or the like, but the dummy molding part 6 and the tongue part molding part 22. Is a non-connected state or a non-fixed state, that is, a free state that is not linked to each other.

 As shown in FIGS. 9 and 10, in the extrusion die 1 of the present embodiment, both the closed portions 35 a and 35 b on the upstream end surface of the molding hole 3 are regions corresponding to the bridge 53 (in the bridge 53) in the front view state. It is arranged in the area to be concealed.

 Furthermore, in the extrusion die 1 of the present embodiment, the distance between the one end closed portion 35a on the upstream end surface of the molding hole 3 and the wall surface 54 of the bridge 53 on the inner peripheral surface of the metal hole 55 of the hole plate 5 in the front view state. When the distance between the other end blocking portion 35b and the wall surface 54 of the bridge 53 is “Db”, the distances Da and Db are adjusted to be substantially (substantially) equal.

  Here, in the present embodiment, the wall surface 54 (hereinafter also referred to as “bridge wall surface”) 54 of the bridge 53 is not necessarily constituted by the entire wall surface of the bridge 53, and the extrusion direction ( It is comprised by the part of the flat surface arrange | positioned in parallel with respect to (axial center direction). In the present invention, a portion of the entire wall surface of the bridge 53 that protrudes inwardly into the metal hole 55 can be defined as a bridge wall surface.

  Further, the distance Da, Db between the bridge wall surface 54 and each of the closed portions 35a, 35b is a straight line (wall surface line) defined by the bridge wall surface 54 or the wall surface line from each of the closed portions 35a, 35b in the front view state. When a perpendicular line is drawn on the extension line, the length is from each blocking portion 35a, 35b to the intersection (foot) of each perpendicular line with the bridge wall surface 54 (wall surface line or its extension line). In other words, the distances Da and Db from the closed portions 35a and 35b to the bridge wall surface 54 are virtual paths that pass through the closed portions 35a and 35b and are parallel to the corresponding bridge wall surfaces 54 and 54 (wall line) in the front view state. This is the length (interval) between the straight lines La and Lb and the bridge wall surfaces 54 and 54.

  Furthermore, in the present invention, when Db / Da is 0.9 to 1.1, more preferably 0.93 to 1.07, both distances Da and Db are substantially (substantially) equal.

  In the present invention, in the front view state, the one end closed portion 35 a and the other end closed portion 35 b are both the region corresponding to the metal hole 55, the region hidden by the bridge 53, and the region matching the bridge wall surface 54. Of these, it is necessary to arrange in one of the areas. That is, if the blocking portions 35a and 35b are located in the region within the bridge 53, the distances Da and Db are represented by positive numbers, and if the obstructions 35a and 35b are located in the region within the round hole 55, the distances Da and Db are represented by negative numbers. When expressed, it is necessary to make the positive and negative of the distance Da and the distance Db also coincide. Therefore, in the present invention, even if the absolute values of the distance Da and the distance Db are equal, if the signs are different, the distances Da and Db are not equal and do not match.

  Needless to say, the bridge wall surface 54 to be measured for the distances Da and Db with respect to the closed portions 35a and 35b is the closest position to the closed portions 35a and 35b among all the bridge wall surfaces 54. In the present invention, the nearest bridge wall surface 54 is referred to as the wall surface of the bridge 53 in the vicinity or the wall surface 54 of the corresponding bridge 53 with respect to each of the blocking portions 35a and 35b.

  In the present embodiment, the distance from the one end closed portion 35a of the molding hole 3 to the axis (center of gravity) X and the distance from the other end closed portion 35b to the axis X are set to be substantially equal in the front view state. Yes.

  As will be apparent from the third and fourth modifications described later, in the present invention, the distance from the one end closing portion 35a to the shaft center (center of gravity) X of the molding hole 3 and the other end closing portion 35b in the front view state. The distance from the axis X to the axis X does not necessarily have to be set equal, and may be different. However, in the present invention, it is even more preferable that the distance between the one end closed portion 35a and the axis X is set equal to the distance between the other end closed portion 35b and the axis X as in this embodiment.

  The extrusion die 1 of the present embodiment configured as described above is held via a die holder (not shown) on the downstream side of the container 11 in the extrusion apparatus 10 as shown in FIG.

  And the extrusion process (manufacturing method of a semi-hollow shape material) using this extrusion processing apparatus 10 is the same as the well-known extrusion process method. That is, an aluminum billet as an extrusion material (molding material) 81 loaded in the container 11 of the extrusion apparatus 10 is pushed in the extrusion direction E through the dummy block 13 by the stem 12. As a result, the extruded material 81 flows from the metal hole 55 of the hall plate 5 to the weld chamber 51, and is further molded from the weld chamber 51 through the molding hole 3. Thereby, the semi-hollow shape member 8 shown in FIG. 8 having a shape corresponding to the molding hole 3 is manufactured.

  In the extrusion die 1 of the present embodiment, there is a gap 22 between the dummy molding part 6 and the tongue part molding part 22, and the dummy molding part 6 is not fixed to the tongue part molding part 22. Therefore, the extrusion load applied to the dummy molding part 6 at the time of extrusion is not supported by the tongue part molding part 22 but is supported only by the bridge 53.

  According to the extrusion processing apparatus 10 of the present embodiment, since the dummy molding part 6 is arranged on the upstream side of the tongue part molding part 22 in the die body 2, the extruded material 81 is the outer periphery of the dummy molding part 6 during the extrusion process. By flowing on the side, the extruded material 81 does not come into pressure contact with the central part (main part) of the tongue part molding part 22 and the extrusion load acting on the tongue part molding part 22 is reduced. For this reason, the possibility that the tongue opening molding portion 23 is damaged by the extrusion load can be kept low, and the durability can be improved.

  Further, in the present embodiment, since the dummy molding portion 6 is separated from the tongue portion molding portion 22, the hole plate 5 is bent by the pushing load, and the dummy molding portion 6 is pushed downstream. Moreover, it can prevent effectively that the dummy shaping | molding part 6 press-contacts to the tongue part shaping | molding part 22. FIG. For this reason, a great load is not applied to the tongue part molding part 22, and also from this point, the damage of the tongue part molding part 23 can be surely prevented, and the durability can be further improved.

  Furthermore, in this embodiment, since the dummy molded part 6 is not fixed to the tongue molded part 22, even if the dummy molded part 6 is displaced due to the deflection of the hole plate 5, it follows the displacement. As a result, the tongue part molding part 22 is not displaced, and the adverse effect of the displacement of the dummy molding part 6 does not reach the tongue part molding part 22. Therefore, breakage of the tongue opening molding part 23 can be prevented more reliably, and the durability can be improved more reliably.

  In this embodiment, since the width dimension S2 of the gap 20 between the dummy molding part 6 and the tongue part molding part 22 is set narrower than the width dimension S1 of the molding hole 3, the extruded material 81 has priority. It passes through the molding hole 3 and can be reliably prevented from entering the gap 20 between the dummy molding part 6 and the tongue part molding part 22. For this reason, it is possible to reliably prevent an adverse effect due to the deflection of the hole plate 5 from reaching the tongue portion molding portion 22 due to a problem caused by the penetration of the extruded material 81 into the gap 20, for example, the extrusion material 81 bites into the gap 20. The durability can be improved more reliably.

  Further, in the present embodiment, since the bearing portions that determine the product shape, such as the inner peripheral bearing portion 31 and the outer peripheral bearing portion 32, are formed only on the die body 2 side, The semi-hollow shape member 8 is superior in dimensional accuracy compared to the case where the peripheral bearing portion and the outer peripheral bearing portion are formed to be dispersed in a male mold (hole plate) and a female mold (port plate). Can be manufactured.

  In other words, when the bearing parts are dispersed in male and female dies, the dimensional accuracy and shape of each bearing part are maintained and managed, for example, adjustment of the positional relationship between the inner and outer bearing parts (bearing Width adjustment) becomes troublesome, and high dimensional accuracy cannot be maintained, and it may be difficult to manufacture a high-quality semi-hollow shape member.

  On the other hand, in this embodiment, since the bearing parts 31 and 32 are concentrated on the die body 2 side, the dimensional accuracy and shape of each bearing part 31 and 32 such as position adjustment between the bearing parts 31 and 32 are adjusted. Maintenance and management can be performed easily with high accuracy, high dimensional accuracy can be maintained, and a high-quality semi-hollow profile can be easily and reliably manufactured.

  Moreover, in this embodiment, since the outer periphery shape of the dummy molding part 6 is formed slightly smaller than the outer periphery shape of the tongue part molding part 22, the extruded material 81 flowing near the outer periphery of the dummy molding part 6 is It is brought into pressure contact with the outer peripheral portion of the tongue portion forming portion 22 and guided to the outer peripheral portion to flow radially outward (outer radial direction) and flows into the forming hole 3. On the other hand, the extruded material 81 that flows in the vicinity of the peripheral wall surface of the weld chamber 51 comes into pressure contact with the outer peripheral portion 21 of the die body 2 and is guided by the outer peripheral portion 21 to flow radially inward (inner diameter direction). Then, it flows into the molding hole 3. Thus, the extrusion material 81 can form a desired ideal flow (metal flow) of the extrusion material 81 in which the extrusion material 81 flows into the molding hole 3 from both sides in the inner diameter direction and the outer diameter direction. Can be performed smoothly, and a high-quality semi-hollow shape product can be more reliably manufactured.

  In particular, in the present embodiment, the outer peripheral shape of the dummy molding part 6 is a shape constituted by equidistant lines with the contour line of the tongue part molding part 22 as a base line. It can flow smoothly from the inside to the outside and flow into the forming hole 3, making it possible to realize the ideal metal flow more reliably, and more reliable semi-hollow shape products. Can be manufactured.

  On the other hand, as shown in FIGS. 9 and 10, according to the extrusion die 1 of the present embodiment, the distance Da between the one end closed portion 35 a of the molding hole 3 and the bridge wall surface 54 is set to the distance between the other end closed portion 35 b and the bridge wall surface 54. Since the distance Db is set to be approximately equal, it is possible to reliably prevent problems such as twisting in the extruded semi-hollow shape product, and to further improve the quality of the shape product.

  That is, in the extrusion die 1 provided with the hole plate 5, the molding material that flows along the inner peripheral surface of the metal hole 55 such as the bridge wall surface 54 has a lower flow rate than the molding material that flows in the center of the metal hole 55. Become. For this reason, in the part corresponding to the metal hole 55 in the weld chamber 51, the flow rate of the molding material becomes slower as the bridge wall surface 54 is approached.

  Further, in the portion corresponding to the bridge 53 in the weld chamber 51, the molding material wraps around from the metal hole 55, so that the flow rate of the molding material increases as the bridge wall surface 54 is approached.

  That is, in the weld chamber 51, the flow rate of the molding material is usually changed according to the distance from the bridge wall surface 54.

  Here, as in the case of the extrusion die 101 shown in FIG. 12A, when the distance Da between the one end closed portion 35a of the molding hole 3 and the bridge wall surface 54 is different from the distance Db between the other end closed portion 35b and the bridge wall surface 54. The flow rate of the molding material flowing from the vicinity of the one end closed portion 35a of the molding hole 3 and the molding material flowing from the vicinity of the other end closed portion 35b are greatly different. If it does so, the flow rate of the extrusion material which passes the one end obstruction | occlusion part 135a side of the shaping | molding hole 3 and the extrusion material which passes the other end obstruction | occlusion part 35b side will not become equal, and twist will generate | occur | produce in the shaped product processed. May be significantly reduced.

  Therefore, in the extrusion die 1 of the present embodiment, as shown in FIGS. 9 and 10, the distances Da and Db with respect to the bridge wall surfaces 54 and 54 of the both ends closed portions 35 a and 35 b in the molding hole 3 are set equal to each other. The flow rates of the molding material flowing from the vicinity of the one end closed portion 35a of the hole 3 and the molding material flowing from the vicinity of the other end closed portion 35b become substantially equal. For this reason, when the extruded material passes at a constant speed on the one end closed portion 35a side and the other end closed portion 35b side of the molding hole 3, the extruded material is constant in the entire area of the molding hole 3 in a front view. Pass by. Therefore, problems such as twisting do not occur in the shaped product to be molded, and the quality can be further improved.

  FIG. 11A is a front view showing the positional relationship between the bridge 53 and the molding hole 3 in the extrusion die 1 which is a first modification of the present invention.

 As shown in the drawing, in the extrusion die 1 of the first modified example, the both-end closed portions 35a and 35b of the molding hole 3 in the die body 1 are disposed in a corresponding region in the metal hole 55 in a front view state. In addition, the distances Da and Db of the blocking portions 35a and 35b with respect to the bridge wall surfaces 54 and 54 in the molding hole 3 are set to be equal. Other configurations are the same as those in the above embodiment.

  Also in the extrusion die 1 of the first modified example, the flow rate of the molding material flowing from the one end closed portion 35a on the upstream end face of the molding hole 3 is equal to the flow rate of the molding material flowing from the other end closed portion 35b. Similar to the form, a high quality semi-hollow extruded profile without twist can be produced.

  Further, with respect to other functions and effects, the same functions and effects can be obtained as in the above-described embodiment.

  FIG. 11B is a front view showing the positional relationship between the bridge 53 and the molding hole 3 in the extrusion die 1 which is a second modification of the present invention. As shown in the figure, in the extrusion die 1 of the second modified example, both ends closed portions 35a and 35b of the molding hole 3 are arranged in a region concealed by one bridge 53 in the front view state, and molded. Four corner portions of the hole 3 are arranged corresponding to the four metal holes 55 respectively. Further, the distances Da and Db of the blocking portions 35a and 35b with respect to the bridge wall surfaces 54 and 54 are set equal. Other configurations are the same as those in the above embodiment.

  Also in the extrusion die 1 of the first modified example, the same operational effects are produced as in the above embodiment.

  FIG. 11C is a front view showing the positional relationship between the bridge 53 and the forming hole in the extrusion die 1 which is the third modification of the present invention. As shown in the figure, the extrusion die 1 of the third modified example is formed by forming the molding hole 3 into a shape that is not symmetrical with respect to the left-right asymmetric shape (non-axisymmetric shape) when viewed from the front. The extruded shape member is formed in an irregular cross-sectional shape having a left-right asymmetric shape corresponding to the shape of the molding hole 3.

  In the extrusion die 1 of the third modified example, the both-end closed portions 35a and 35b of the molding hole 3 are disposed in the region within the bridge 55 in the front view state, and the bridge wall surfaces 54 and 54b of the closed portions 35a and 35b, The distances Da and Db with respect to 54 are set equal. Furthermore, in the extrusion die of the second modification, in the front view state, the distance from the one end closed portion 35a of the molding hole 3 to the axis (center of gravity) X and the distance from the other end closed portion 35b to the axis X are as follows. They are different (the same applies to a fourth modification described later).

  Other configurations are the same as those in the above embodiment.

  The extrusion die 1 of the third modified example also has the same operational effects as in the above embodiment.

  In particular, when manufacturing a shape product having a non-symmetrical cross section, the distance Da from the one-end closed portion 35a to the bridge wall surface 54 in the molding hole 3 and the like, as in the extrusion die 101 shown in FIG. In general, the distance Db from the end closing portion 35b to the bridge wall surface 54 is greatly different, and in the configuration, as described above, harmful twist is likely to occur in the shape product.

  On the other hand, in the extrusion die 1 of the third modified example, in the same way as in the above embodiment, in the front view, the molding material passes through the entire area of the molding hole 3 at a constant speed, and the high-quality semi-hollow extrusion without twisting. It is possible to reliably manufacture the shape product.

  FIG. 11D is a front view showing the positional relationship between the bridge 53 and the molding hole 3 in one extrusion die which is a fourth modification of the present invention. In the extrusion die 1, both end closed portions 35 a and 35 b of the molding hole 3 are disposed on the bridge wall surfaces 54 and 54 (bridge wall surface lines) in a front view state, and from the one end closed portion 35 a to the bridge wall surface 54. Both the distance Da and the distance Db from the other end blocking portion 35b to the bridge wall surface 54 are set to substantially 0 mm. Other configurations are the same as those in the above embodiment.

  The extrusion die of the fourth modified example also has the same function and effect as in the above embodiment.

  Note that the present invention is not limited to the above-described embodiments and modifications, and can be variously modified without departing from the gist of the present invention.

  Moreover, in the said embodiment, although aluminum was mentioned and mentioned as an example as a material of an extrusion material (semi-hollow shape material), not only that but metal other than aluminum can also be used for this invention.

  Furthermore, in the present invention, the number and shape of the metal holes 55 of the hole plate 5 are not limited to those of the above embodiment.

  Moreover, in the said embodiment, although the dummy shaping | molding part 6 and the tongue part shaping | molding part 22 are arrange | positioned in the state spaced apart, it is not restricted to it, In this invention, the downstream end surface of the dummy shaping | molding part 6 and a tongue part You may arrange | position in the state which contacted the upstream end surface of the shaping | molding part 22. FIG.

  In the above embodiment, a solid die type extrusion die provided with bearing portions 31 and 32 on the die body 1 side has been described as an example. However, the present invention is not limited to this, and in the present invention, the hole plate has a male plate. The present invention can also be applied to a semi-hollow type extrusion die in which a die die (inner peripheral side bearing portion) is provided and a die die (port plate) is provided with a female die (outer peripheral side bearing portion).

  In the above-described embodiment, the extrusion die in which the weld chamber 51 is provided on the hole plate 5 has been described as an example. However, the present invention is not limited thereto, and in the present invention, the weld chamber may be formed on the die body side. Further, it may be formed so as to straddle both the hole plate and the die body. In short, the weld chamber may be provided in at least one of the hole plate and the die body.

  The present invention is applicable to an extrusion die used when producing a semi-hollow profile by extrusion.

1: Extrusion die 10: Extrusion device 2: Die body 22: Tongue forming part 23: Tongue opening forming part 3: Molding hole 35a: One end closing part 35b: Other end closing part 5: Hall plate 50: Axial part 51: Weld chamber 53: Bridge 54: Bridge wall surface 55: Metal hole 6: Dummy molding part 8: Semi-hollow shape member 81: Extruded material 82: Tongue part 83: Tongue opening Da, Db: From the closed part to the bridge wall surface Distance E: Extrusion direction X: Center axis

Claims (7)

A forming hole for forming a semi-hollow shape member, a tong portion forming portion for forming a tong portion of the semi-hollow shape member, a tong opening forming portion for forming a tong opening portion of the semi-hollow shape member, and an upstream of the forming hole A weld chamber provided on the side, a plurality of metal holes penetrating along the extrusion direction from the upstream side to the weld chamber and spaced apart in the circumferential direction, and a bridge provided between adjacent metal holes in the circumferential direction An extrusion die for producing a semi-hollow shape material in which the molding material introduced from the plurality of metal holes is allowed to pass through the molding hole via the weld chamber,
When viewed from the upstream side along the extruding direction, the distance from the one end blocking portion on the upstream end surface of the molding hole to the wall surface of the nearby bridge is the other end blocking portion on the upstream end surface of the molding hole. Is set to be approximately equal to the distance to the wall of the nearby bridge ,
When the distance from the one end closed portion of the molding hole to the nearby bridge wall surface is “Da” and the distance from the other end closed portion to the nearby bridge wall surface is “Db”, Db / Da is 0.9 to 1. Is set to 1,
In the front view state, the molding hole is formed in a non-axisymmetric shape,
The die body and the hole plate provided on the upstream side are provided separately,
The molding hole, the tongue part molding part, and the tongue opening part molding part are provided in the die body,
The weld chamber, the metal hole, and the bridge are provided in the hole plate;
In the weld chamber in the hole plate, a dummy molding part is provided corresponding to the upstream side of the tongue part molding part of the die body,
An extrusion die for producing a semi-hollow shape member , wherein the dummy molding part is in an unfixed state with respect to the tongue part molding part . In the front view state, the distance from the one end closed portion of the molding hole to the axis of the die body is set to be substantially equal to the distance from the other end closed portion of the molding hole to the axis of the die body. The extrusion die for producing a semi-hollow shape member according to claim 1 . A portion surrounded by the plurality of metal holes in the hole plate is configured as an axial center portion,
The extrusion die for producing a semi-hollow shape member according to claim 1 or 2 , wherein the dummy forming portion is provided at a downstream end portion of the shaft center portion. The extrusion die for producing a semi-hollow shape member according to any one of claims 1 to 3 , wherein the dummy molded portion is disposed in contact with the tongue portion molded portion. The extrusion die for producing a semi-hollow shape member according to any one of claims 1 to 3 , wherein the dummy forming portion is disposed in a state of being separated from the tongue portion forming portion. An apparatus for producing a semi-hollow profile comprising an extrusion die for producing a semi-hollow profile by extruding an extruded material,
The said extrusion die is comprised by the extrusion die for semi-hollow shape material manufacture of any one of Claims 1-5 , The manufacturing apparatus of the semi-hollow shape material characterized by the above-mentioned. A semi-hollow shape material is produced by extruding an extruded material using the extrusion die for producing a semi-hollow shape material according to any one of claims 1 to 5. A method for manufacturing a profile.

Images