JP2010279960A - Rotary wheel type continuous extruder and method of manufacturing metallic extruded material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a metallic extruded material with high quality, to prolong the life of a tool by preventing the damage of a die and to reduce the cost of equipment and the manufacturing cost of the metallic extruded material. <P>SOLUTION: A rotary wheel type continuous extruder includes: the base stock guiding passage which is formed by covering a part of a groove 11 of a rotating wheel 10 with respective inner peripheral surfaces of a shoe and a feed plate 15; an abutment 17 which is provided projectingly in the grooves 11 so as to close the downstream end of the base stock guiding passage; a base stock guiding hole 19 which is formed on the feed plate 15 and opened at the downstream end of the base stock guiding passage; and a die 22 which is arranged on the side of outside 15 of the feed plate 15 and in which a forming hole 23 which is communicated with the base stock guide hole 19 is formed, wherein the metallic extruded material S is formed by extruding a base stock for extrusion introduced into the base stock guiding passage from the forming hole 23. A plurality of flow guides 20 having an adjusting hole 21 which is communicated with the base stock guiding hole 19 and the forming hole 23 are provided, along the extruding direction E of the base stock for extrusion, between the feed plate 15 and the die 22. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rotary wheel type continuous extrusion apparatus for forming a metal extruded material having a desired cross-sectional shape by extrusion, and a method for producing a metal extruded material using the same.

A rotary wheel type continuous extrusion apparatus is an apparatus for continuously producing a metal extruded material having a desired cross-sectional shape by extruding a metal material (extrusion material) such as aluminum or copper.
In general, a rotary wheel type continuous extrusion apparatus includes a material guide passage formed by covering a part of a groove formed on an outer peripheral surface of a rotary wheel with inner peripheral surfaces of a shoe and a feed plate, and a downstream end of the material guide passage. The feed plate is arranged between the abutment protruding in the groove so as to block the material, the material guide hole formed in the feed plate and opened to the downstream end of the material guide passage, and the rotating wheel. And a molding hole formed in the die and communicating with the material guide hole.

  When extruding a metal extrusion using this rotary wheel type continuous extrusion device, the rotary wheel is rotated in the direction from the upstream side to the downstream side of the material guide passage, and on the upstream side of the material guide passage. What is necessary is just to insert a wire-form extrusion material in the groove | channel of a rotating wheel. Thereby, the raw material for extrusion is drawn into the raw material guide passage by the frictional force with the rotating wheel, and is blocked by the abutment at the downstream end thereof. At this time, in order to obtain an extrusion pressure, the extrusion material becomes plastic by friction and deformation heat generation, is extruded from a die forming hole, is molded into a metal extruded material having a desired cross-sectional shape, and is sent out.

  By the way, using such a rotating wheel type continuous extrusion apparatus, a metal extruded material having a flat cross-sectional shape may be produced from a material for extrusion having a circular cross-sectional shape. That is, there is a case where a round bar-shaped extrusion material is formed to produce a plate-shaped metal extrusion material having a wide width perpendicular to the outflow direction of the metal extrusion material and a thin thickness.

  In this case, paying attention to the outflow speed of the extruded metal material (extrusion material) flowing out from the die forming hole, the outflow speed at both ends in the width direction of the extruded metal material is more than the outflow speed at the center portion in the width direction. Also tends to be late. That is, when producing a metal extrudate made of such a wide and thin plate, it is sufficiently diffused in the width direction (hereinafter referred to as “broadening”) until the extrusion material reaches the forming hole of the die. Since it becomes difficult, it is difficult to sufficiently supply the material for extrusion to both ends in the width direction. As a result, the difference in the outflow speed as described above occurs, the plate thickness at both ends in the width direction of the metal extruded material is insufficient, or wavy material shortage defects occur at both ends, resulting in a product. Accuracy could not be ensured.

  Therefore, in order to ensure the quality of the product, for example, in Patent Document 1, in the extrusion process of an aluminum alloy, a flow guide having an opening (adjustment hole) is provided on the upstream side of the die (die). Yes. The adjustment holes of the flow guide are arranged so as to correspond to the forming holes of the dies, and are formed so as to open larger than the forming holes.

By providing such a flow guide, the material for extrusion is sufficiently expanded and filled in the adjustment hole of the flow guide, and when flowing into the molding hole of the downstream die, the speed is adjusted, so When the extrusion material flows out of the molding hole, the above-described difference in the outflow speed is suppressed.
Patent Document 2 and Non-Patent Documents 1 and 2 also describe a method of disposing an enlarged ring (flow guide) having an opening (adjustment hole) on the upstream side of the die.

Japanese Patent No. 3508674 Japanese Patent No. 3650655

“Plasticity and processing”, Japan Society for Technology of Plasticity, November 1998, Vol. 39, No. 454, p. 1150-1154 “Plasticity and processing”, Japan Society for Technology of Plasticity, October 1999, Vol. 40, No. 465, p. 976-980

  However, in the case of forming copper or copper alloy harder than aluminum using the above-described rotary wheel type continuous extrusion apparatus, it is still difficult to ensure the quality of the metal extruded material using the flow guide. . That is, since copper and copper alloys are relatively hard and difficult to plastically deform, they are not easily widened in the width direction in the adjustment hole of the flow guide. Therefore, it becomes difficult for the raw material for extrusion to be filled in the entire forming hole of the die, and it is difficult to suppress the difference in the outflow speed.

  In particular, at the start of extrusion, when the extrusion material is not sufficiently plasticized in the adjustment hole of the flow guide and is pressed against the end surface facing the upstream side of the die, it is close to the molding hole in the end surface. Excessive extrusion pressure was locally applied, and the die could be damaged.

  In Non-Patent Documents 1 and 2, the flow guide adjusting hole and the die forming hole are set so that their cross-sectional shapes and dimensions are greatly different. However, in this case, a part of the adjustment hole opened to the die side is covered with the end surface of the die, and the extrusion material dams up the step portion between the flow guide and the die when passing through the adjustment hole. It is stopped and so-called dead metal is generated. When such a dead metal occurs, a part of it will flow out of the forming hole together with the extrusion material that becomes the metal extrusion material, and it is caught in the metal extrusion material and the quality of the metal extrusion material is deteriorated. Occurs.

  In order to avoid such quality degradation, it is conceivable to individually manufacture the flow guide according to the shape of the die forming hole, but the flow guide is made of an expensive and difficult-to-cut nickel-based heat-resistant alloy. Therefore, the equipment cost increases and the manufacturing cost of the metal extruded material increases.

  The present invention has been made in consideration of such circumstances, and can produce a metal extruded material with high quality, prevent damage to the die, extend the tool life, and reduce the equipment cost and the metal extruded material production cost. It is an object of the present invention to provide a rotating wheel type continuous extrusion apparatus that can be reduced and a method for producing a metal extrusion using the same.

In order to achieve the above object, the present invention proposes the following means.
That is, the present invention provides the material guide passage formed by covering a part of the groove formed on the outer peripheral surface of the rotating wheel with the inner peripheral surfaces of the shoe and the feed plate, and the downstream end of the material guide passage so as to block the downstream end. An abutment projecting in the groove, a material guide hole formed in the feed plate and opening at a downstream end of the material guide passage, and an outer surface side opposite to the inner peripheral surface of the feed plate A rotary wheel type continuous extrusion apparatus that includes a die formed with a forming hole communicated with the material guide hole, and extrudes an extrusion material introduced into the material guide passage from the forming hole to form a metal extruded material. A plurality of flow guides having adjustment holes communicating with the material guide holes and the forming holes are provided between the feed plate and the die along the extrusion direction of the extrusion material. And said that you are.
Further, the present invention is a method for producing a metal extruded material using the aforementioned rotary wheel type continuous extrusion apparatus, wherein a material for extrusion made of a metal material is introduced into the material guide passage, and a downstream end of the material guide passage is provided. The sheet is pressed into the material guide hole of the feed plate, and is passed through the adjustment hole of the flow guide and extruded from the forming hole of the die, thereby forming a cross-sectional shape corresponding to the forming hole.

  According to the rotary wheel type continuous extrusion apparatus and the metal extrusion material manufacturing method using the same according to the present invention, a plurality of flow guides are provided along the extrusion direction between the feed plate and the die. By adjusting and combining the adjustment holes of the flow guide in various ways, the cross-sectional shape perpendicular to the extrusion direction of the extrusion material flowing in the adjustment holes can be arbitrarily deformed before reaching the forming hole of the die. Thus, when the resin flows into the molding hole, the whole molding hole is easily filled. That is, for example, the extrusion material is easily widened outward in the surface direction of the cross section orthogonal to the extrusion direction in the adjustment hole.

  Furthermore, by providing a plurality of flow guides in this way, the run-up section of the extrusion material can be made relatively long between the material guide hole of the feed plate and the forming hole of the die. After filling the adjustment hole of the flow guide with certainty, it is uniformly fed into the entire die forming hole.

  Therefore, for example, a relatively hard metal material such as copper or a copper alloy is used as an extrusion material, and a product having a flat rectangular cross section and a wide and thin plate shape is manufactured as a product. Even in such a case, the extrusion material is deformed so as to correspond to the shape of the forming hole in the adjustment hole of the flow guide until it reaches the forming hole of the die. As a result, the outflow speed at which the extrusion material is extruded from the forming hole is set uniformly over the entire surface direction of the cross section orthogonal to the extrusion direction, enabling high-precision extrusion and high-quality metal. Extruded material can be manufactured.

  In addition, since the extrusion material is deformed in the adjustment hole in this way, it is sent to the entire die forming hole, so that the extrusion material is sufficiently plasticized due to friction and deformation heat generation. It is prevented that excessive extrusion pressure is locally applied in the vicinity of the forming hole on the end face facing the upstream side of the die. Therefore, the breakage of the die at the start of extrusion is reliably prevented, and the tool life is extended.

  In addition, since there are multiple flow guides and each adjustment hole is combined, there is no need to manufacture the flow guide individually according to the die forming hole to suppress the occurrence of dead metal as in the past. Compared with such a configuration, the equipment cost is reduced. That is, in the present invention, among the plurality of flow guides, at least one flow guide adjustment hole adjacent to the end face facing the upstream side of the die may be formed so as to correspond to the forming hole of the die. Equipment costs such as the material cost of the flow guide are significantly reduced, and the manufacturing cost of the metal extruded material can be suppressed.

  Further, in the rotary wheel type continuous extrusion apparatus according to the present invention, among the flow guides, at least the adjustment hole of the flow guide adjacent to the end surface facing the upstream side of the die is orthogonal to the extrusion direction of the forming hole. The cross-sectional shape to be set may be set large.

  According to the rotary wheel type continuous extrusion apparatus according to the present invention, the cross-sectional shape of the adjustment hole of the flow guide adjacent to the end face facing the upstream side of the die is set larger than the cross-sectional shape of the die forming hole, The extrusion material is sufficiently widened outwardly in the surface direction of the cross section so as to cover the downstream forming hole in the adjusting hole, and then the speed is adjusted, and then flows into the forming hole. Therefore, the extrusion material flows out uniformly from the entire forming hole, and the quality of the metal extruded material extruded from the forming hole is sufficiently ensured.

  In particular, in the case of manufacturing a metal extrudate having a wide and thin plate shape as described above, the extrusion material is directed outward in the width direction in the adjustment hole of the flow guide adjacent to the end face of the die. Therefore, it is possible to manufacture a high-quality metal extrusion material more reliably, such as a lack of plate thickness or a wavy material shortage defect at both ends in the width direction of the metal extrusion material. .

  Further, in the rotary wheel type continuous extrusion apparatus according to the present invention, three or more flow guides are provided, and among these flow guides, the adjustment hole of the flow guide disposed in the center in the extrusion direction is It is good also as that the cross-sectional shape orthogonal to the extrusion direction is set larger than the said adjustment hole of the flow guide arrange | positioned at the both ends of the extrusion direction.

  According to the rotating wheel type continuous extrusion apparatus according to the present invention, the extrusion material is arranged in the center of the extrusion direction from the adjustment hole of the flow guide arranged on the feed plate side in the extrusion direction among these flow guides. When flowing toward the adjustment hole of the flow guide, it is widened outward in the surface direction of the cross section perpendicular to the extrusion direction. Next, when flowing from the adjustment hole of the central flow guide toward the adjustment hole of the flow guide disposed on the die side in the extrusion direction, the flow is focused toward the inner side (center) of the surface direction. To go. When the extrusion material flows from the adjustment hole of the flow guide on the die side toward the molding hole of the die, it is uniformly introduced into the entire molding hole.

  According to such a configuration, in the adjustment hole of the flow guide, the cross-sectional shape of the material for extrusion is sufficiently increased and then appropriately reduced and deformed so as to correspond to the shape of the die forming hole. Therefore, the extrusion material efficiently flows into the forming hole, and it is reliably prevented that excessive dead metal is generated in the adjustment hole, and the extrusion material flows out uniformly from the entire forming hole. Thus, the quality of the metal extruded material is greatly improved.

  In addition, since the structure is a combination of a plurality of flow guides, as described above, it is relatively easy even if the cross-sectional shape of the center adjustment hole in the extrusion direction is set larger than the cross-sectional shape of the adjustment holes at both ends. Can be manufactured.

  Moreover, the rotary wheel type continuous extrusion apparatus according to the present invention may be provided with a heating means for heating at least the adjustment hole of the flow guide and the molding hole of the die.

  According to the rotating wheel type continuous extrusion apparatus according to the present invention, for example, a heater or a burner is provided as a heating means for heating at least the adjustment hole of the flow guide and the molding hole of the die. The adjustment hole and the forming hole can be sufficiently heated in advance. Therefore, even at the start of extrusion where a relatively large extrusion pressure is required, the extrusion material disposed in the adjustment hole and the molding hole is easily plastically deformed by heating, and the metal extrusion material is relatively simple. Can be extruded. Thereby, a quality metal extrusion material can be manufactured from the beginning of extrusion.

  Moreover, since the extrusion material is easily plastically deformed and does not require an excessive extrusion pressure, the tool such as a die can be prevented from being damaged. Accordingly, the tool life is extended.

According to the rotary wheel type continuous extrusion apparatus according to the present invention, the metal extruded material can be manufactured with high quality, the die can be prevented from being broken and the tool life can be extended, and the equipment cost and the metal extruded material manufacturing cost can be reduced.
Moreover, according to the manufacturing method of the metal extrusion material which concerns on this invention, a high quality metal extrusion material can be manufactured comparatively easily using the above-mentioned rotary wheel type | mold continuous extrusion apparatus.

It is a sectional side view showing a schematic structure of a rotary wheel type continuous extrusion device concerning one embodiment of the present invention. It is a plane sectional view in the XX section of FIG. It is the figure which looked at the die | dye side from the YY cross section of FIG.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a rotary wheel type continuous extrusion apparatus 1 according to an embodiment of the present invention is provided with a rotary wheel 10 that can be driven to rotate in the direction of arrow A about a rotation axis C. Grooves 11 for guiding the wire-like extrusion material W to be extruded are provided on the outer circumferential surface of the rotating wheel 10 over the circumferential direction. The extrusion material W is made of, for example, copper or a copper alloy, and is disposed in the groove 11. The rotation wheel 10 is driven by the rotational drive of the rotation wheel 10 and the frictional force between the groove 11 and the extrusion material W. To be sent in the A direction.

  Specifically, the extrusion material W is forcibly pushed into the groove 11 by the coining roll 12 arranged on the upstream side in the rotation direction of the rotary wheel 10 with respect to the shoe 14 described later. The coining roll 12 is pressed against the outer peripheral surface of the rotating wheel 10 so as to cover the groove 11, and is configured to rotate in the direction of arrow B in cooperation with the rotating wheel 10.

  The shoe 14 formed in a substantially rectangular plate shape is held in a positioning state by the housing 13 over a predetermined length range in the circumferential direction of the rotating wheel 10. The shoe 14 is disposed so as to be in sliding contact with the outer peripheral surface of the rotating wheel 10 and to close the opening of the groove 11 with respect to the outer peripheral surface. The inner peripheral surface 14 a of the shoe 14 that is in sliding contact with the rotating wheel 10 is formed in a curved surface so as to be in sliding contact with the outer peripheral surface of the rotating wheel 10 along a circumferential direction by a predetermined length.

  A feed plate 15 is disposed adjacent to the downstream side in the rotation direction of the rotary wheel 10 relative to the shoe 14. Similar to the shoe 14, the feed plate 15 is held in a positioning state by the housing 13 and is in sliding contact with the outer peripheral surface of the rotary wheel 10 to close the opening of the groove 11 with respect to the outer peripheral surface. That is, the inner peripheral surface 15 a of the feed plate 15 that is in sliding contact with the rotating wheel 10 is formed in a curved surface so as to be in sliding contact with the outer peripheral surface of the rotating wheel 10 along the circumferential direction by a predetermined length.

  In this way, the material guide for guiding the extrusion material W in the direction A in a state of being arranged in the groove 11 of the rotating wheel 10 by the groove 11, the inner peripheral surface 14 a of the shoe 14 and the inner peripheral surface 15 a of the feed plate 15. A passage 16 is formed.

  In addition, an abutment 17 is disposed on a downstream portion of the inner peripheral surface 15a of the feed plate 15 in the rotation direction of the rotating wheel 10 (a lower portion of the inner peripheral surface 15a in FIG. 1). As shown in FIG. 2, the abutment 17 protrudes into the groove 11 so as to close the downstream end of the material guide passage 16 and is disposed with a slight gap from the inner surface of the groove 11. In other words, the abutment 17 is configured to dam the extrusion material W at the central portion excluding the vicinity of the inner surface of the groove 11 at the downstream end of the material guide passage 16.

  Here, as described above, a slight gap exists between the groove 11 and the abutment 17, but a slight gap is also provided between the shoe 14 and the feed plate 15 and the outer peripheral surface of the rotating wheel 10. It has been. Then, the extrusion material W that has become plastic from these gaps is extruded in a burr shape, and these burrs adhere to the inner surface of the groove 11 and the outer peripheral surface of the rotating wheel 10.

  Therefore, in order to remove these burrs, a scraper 18 is provided further downstream in the rotational direction of the abutment 17 as shown in FIG. The scraper 18 is formed so that its sharp tip portion can be slidably contacted with the inner surface of the groove 11 and the outer peripheral surface of the rotary wheel 10 to scrape off the attached burrs.

  In addition, as shown in FIGS. 1 to 3, the feed plate 15 is extruded in a direction in which the metal extruded material S is formed from a position corresponding to the groove 11 of the rotating wheel 10 at a substantially central portion of the inner peripheral surface 15 a (see FIG. A material guide hole 19 penetrating in the direction of arrow E) is formed. That is, the material guide hole 19 is opened on the downstream end side of the material guide passage 16.

  Specifically, the material guide hole 19 includes an inflow portion 19a disposed on the upstream side in the extrusion direction E, an outflow portion 19b disposed on the downstream side in the extrusion direction E, and the inflow portion 19a and the outflow portion 19b. And an intermediate portion 19c arranged in the middle.

  The inflow portion 19 a is formed in a substantially oval shape in cross section perpendicular to the extrusion direction E, and is open to the groove 11. Specifically, as shown in FIG. 3, the cross section of the inflow portion 19 a is formed so as to extend in the vertical direction (arrow F direction) along the portion of the groove 11 that opens. In the present embodiment, this F direction is set to the thickness direction of the metal extruded material S.

  The outflow portion 19b has a substantially rectangular cross section perpendicular to the extrusion direction E, and is recessed from a surface 15b opposite to the inner peripheral surface 15a of the feed plate 15 (hereinafter referred to as “outer surface 15b”). While being formed, it opens to an adjustment hole 21a of a flow guide 20A described later. Specifically, the cross section of the outflow portion 19b is formed to extend in the horizontal direction (arrow G direction) orthogonal to the F direction on the outer surface 15b. In the present embodiment, the G direction is set to the width direction of the metal extruded material S.

  Moreover, the dimension of the F direction in the cross section of the outflow part 19b is set substantially the same as the dimension of the F direction in the cross section of the inflow part 19a. That is, the cross-sectional area of the outflow portion 19b is set larger than the cross-sectional area of the inflow portion 19a. In the present embodiment, the cross-sectional dimension of the outflow portion 19b is set to about 20 mm (F direction) × 38 mm (G direction).

  Further, the intermediate portion 19c is formed so that a cross section perpendicular to the extrusion direction E has a substantially elliptical shape and its long axis extends in the G direction. Further, the intermediate portion 19c is formed so as to be recessed from the inner surface of the inflow portion 19a, and has a tapered shape that gradually expands in the G direction from the inner peripheral surface 15a side of the feed plate 15 toward the outer surface 15b side. Moreover, the dimension of the G direction in the cross section of the intermediate part 19c is set smaller than the dimension of the G direction in the cross section of the outflow part 19b.

  A plurality of flow guides 20, dies 22, and a plurality of backup rings 24 are sequentially arranged in the extrusion direction E on the outer surface 15 b side of the feed plate 15. The flow guide 20, the die 22, and the backup ring 24 are each formed in a disk shape, and are held in a positioned state in the housing 13 like the feed plate 15.

  A forming hole 23 communicating with the material guide hole 19 of the feed plate 15 is formed in the die 22. The forming hole 23 is formed through the die 22 in the extrusion direction E, and has a rectangular shape with a flat cross section perpendicular to the extrusion direction E. The extrusion material W is formed into a metal extruded material S having a desired cross-sectional shape by passing through the molding hole 23 and is sent out in the extrusion direction E.

  Specifically, the cross-sectional shape of the forming hole 23 is formed in a flat rectangular shape that is longer in the G direction and shorter in the F direction than the outflow portion 19b in the material guide hole 19 of the feed plate 15. The metal extrudate S formed through 23 has a flat plate shape. In the present embodiment, the cross-sectional dimension of the forming hole 23 is set to about 2.7 mm (F direction) × 50 mm (G direction).

  The flow guide 20 is made of a nickel-based heat-resistant alloy, and a plurality of flow guides 20 are disposed along the extrusion direction E between the feed plate 15 and the die 22. The flow guide 20 is formed with an adjustment hole 21 communicating with the material guide hole 19 and the molding hole 23. In the present embodiment, three flow guides 20 are provided continuously in the extrusion direction E.

  Among these flow guides 20, the flow guide 20 </ b> A disposed upstream of the extrusion direction E and adjacent to the outer surface 15 b of the feed plate 15 has an adjustment hole 21 a having a substantially rectangular cross section perpendicular to the extrusion direction E. Is formed. The adjustment hole 21a is disposed at a position corresponding to the material guide hole 19, and is formed so that its cross-sectional shape extends in the G direction as shown in FIG.

  Further, the dimension in the G direction in the cross section of the adjustment hole 21 a is set to be larger than the dimension in the G direction in the cross section of the outflow portion 19 b of the material guide hole 19. Moreover, the dimension of the F direction in the cross section of the adjustment hole 21a is set substantially the same as the dimension of the F direction in the cross section of the outflow part 19b. In the present embodiment, the cross-sectional dimension of the adjustment hole 21a is set to about 20 mm (F direction) × 50 mm (G direction).

  Of these flow guides 20, the flow guide 20 </ b> B that is arranged on the downstream side in the extrusion direction E and faces the upstream side in the extrusion direction E of the die 22 is adjacent to the flow guide 20 </ b> B in a cross section orthogonal to the extrusion direction E. Is formed with an adjustment hole 21b having a substantially rectangular shape, a substantially glasses shape, or a substantially drum shape. The adjustment hole 21b is disposed at a position corresponding to the molding hole 23, and is formed so that its cross-sectional shape extends in the G direction.

  As shown in FIG. 3, the adjustment hole 21 b has a larger cross-sectional shape perpendicular to the extrusion direction E than the molding hole 23 of the die 22. Specifically, the dimensions in the F direction and the G direction in the cross section of the adjustment hole 21b are set larger than the dimensions in the F direction and the G direction in the cross section of the forming hole 23, respectively. In the cross section of the adjusting hole 21b, the dimension in the F direction is the smallest at the center (inward) portion in the G direction, and gradually increases from the center toward the outer side in the G direction. Is set.

  In the present embodiment, the cross section of the adjustment hole 21b has a substantially drum shape, and a pair of sides forming both sides in the F direction are respectively formed in a convex curve shape protruding toward the center in the F direction. Yes. Further, in the cross section of the adjustment hole 21b, a pair of sides forming both sides in the G direction are each formed in a concave curve shape that is recessed outward in the G direction. In the cross section of the adjustment hole 21b, the maximum dimension in the G direction is set to about 60 mm.

  Of these flow guides 20, the flow guide 20 </ b> C sandwiched between the flow guides 20 </ b> A and 20 </ b> B and disposed in the center of the extrusion direction E has a substantially rectangular cross section perpendicular to the extrusion direction E. An adjustment hole 21c is formed. The adjustment hole 21c is disposed at a position corresponding to the adjustment holes 21a and 21b of the flow guides 20A and 20B, and is formed so that its cross-sectional shape extends in the G direction as shown in FIG. The adjustment hole 21c is set to have a larger cross-sectional shape perpendicular to the extrusion direction E than the adjustment holes 21a and 21b.

Specifically, the dimension in the G direction in the cross section of the adjustment hole 21c is set larger than each dimension in the G direction in the cross section of the adjustment holes 21a and 21b. The dimension in the F direction in the cross section of the adjustment hole 21c is set to be substantially the same as the dimension in the F direction in the cross section of the adjustment hole 21a, and is set larger than the dimension in the F direction in the cross section of the adjustment hole 21b. In the present embodiment, the cross-sectional dimension of the adjustment hole 21c is set to about 20 mm (F direction) × 65 mm (G direction).
In addition, these flow guides 20A, 20B, and 20C are each set to have a dimension along the extrusion direction E of about 5 to 10 mm.

  Further, the plurality of backup rings 24 are arranged so as to overlap in the E direction in which the extruded metal material S is pushed out so that the pushing force acting on the die 22 is transmitted to and supported by the housing 13. Further, these backup rings 24 have respective ring holes in the passages for guiding the metal extruded material S fed in the extrusion direction E from the forming hole 23 of the die 22 at positions corresponding to the forming holes 23. .

  Of these backup rings 24, a backup ring 24 </ b> A disposed substantially at the center in the extrusion direction E incorporates a substantially U-shaped rod-shaped heater 25. The heater 25 is disposed so as to surround the ring hole of the backup ring 24A.

  In addition, as shown in FIG. 2, heater blocks 26 are respectively disposed outside the flow guide 20 and the dice 22 in the G direction so as to surround the flow guide 20 and the dice 22. These heater blocks 26 are formed in a rectangular bar shape, a substantially rectangular parallelepiped shape, or a rectangular plate shape, and are supported and disposed on the housing 13.

  The heater block 26 includes a plurality of heaters 27 that are rod-shaped and extend in the F direction. These heaters 27 are formed in, for example, an I shape or a U shape. Further, the surface facing inward in the G direction in the heater block 26 is arranged close to the surface facing outward in the G direction in the flow guide 20 and the die 22. With such a configuration, the heater block 26 serves as a heating unit that generates heat from these heaters 27 and heats at least the adjustment hole 21 of the flow guide 20 and the molding hole 23 of the die 22.

Next, the manufacturing method of the metal extrusion material S using the rotary wheel type continuous extrusion apparatus 1 comprised as mentioned above is demonstrated.
First, in FIG. 1, the wire-like extrusion material W is pressed by the coining roll 12 into the groove 11 of the rotating wheel 10 that is rotationally driven in the A direction. This extrusion material W is pulled by the frictional force between the extrusion material W and the groove 11 due to the rotational drive of the rotary wheel 10 and is fed into the material guide passage 16.

  The downstream end in the rotational direction of the material guide passage 16 is blocked by an abutment 17, and the pressure in the passage is increased by the extruded material W fed in. The extrusion material W is press-fitted into the material guide hole 19 of the feed plate 15 while undergoing plastic deformation due to friction and deformation heat generation, passes through the adjustment hole 21 of the flow guide 20, and from the forming hole 23 of the die 22. By being extruded in the E direction, it is formed into a flat metal extrusion S corresponding to the shape of the forming hole 23.

  As described above, according to the rotary wheel type continuous extrusion apparatus 1 according to the present embodiment, a plurality of flow guides 20 are provided along the extrusion direction E between the feed plate 15 and the die 22. By variously setting and combining the adjustment holes 21 of these flow guides 20, the extrusion material W flowing through the adjustment holes 21 is orthogonal to the extrusion direction E until it reaches the forming hole 23 of the die 22. When the cross-sectional shape to be deformed is arbitrarily changed and flows into the forming hole 23, the entire forming hole 23 is easily filled.

  Furthermore, by providing a plurality of flow guides 20 in this way, it is possible to sufficiently take a section in which the extrusion material W is widened between the material guide hole 19 of the feed plate 15 and the molding hole 23 of the die 22. After the extrusion material W is reliably filled in the adjustment holes 21 of the flow guide 20, the extrusion material W is uniformly fed into the entire molding hole 23 of the die 22.

  Accordingly, a relatively hard metal material such as copper or a copper alloy is used as the extrusion material W, and a metal extrusion material S having a flat cross-sectional rectangular shape and a wide and thin plate shape is manufactured as a product. Even if it is a case, in the adjustment hole 21 of the flow guide 20 until the raw material W for extrusion reaches | attains the shaping | molding hole 23 of the die | dye 22, the width direction (in the surface direction of the cross section orthogonal to the extrusion direction E ( (G direction) Widened sufficiently outward. Thereby, the outflow speed at which the raw material W for extrusion is extruded from the molding hole 23 is set uniformly in the entire width direction, so that high-precision extrusion processing can be performed and a high-quality metal extruded material S can be manufactured. .

  In addition, since the material W for extrusion W is fed into the entire molding hole 23 of the die 22 in a state in which the material W for extrusion is sufficiently plasticized due to friction and deformation heat generation, in the vicinity of the molding hole 23 on the end surface 22a facing the upstream side of the die 22. It is prevented that an excessive extrusion pressure is applied locally. Therefore, especially the breakage of the die 22 at the start of extrusion is reliably prevented, and the tool life is extended.

  In addition, since a plurality of flow guides 20 are provided and the respective adjustment holes 21a, 21b, and 21c are combined, the flow guides are individually matched to the forming holes 23 of the die 22 in order to suppress the occurrence of dead metal as in the prior art. There is no need to manufacture 20, and the equipment cost is reduced as compared with such a configuration. That is, in the present embodiment, among the plurality of flow guides 20, at least only the adjustment hole 21 b of one flow guide 20 B adjacent to the end surface 22 a facing the upstream side of the die 22 is formed so as to correspond to the molding hole 23. Since it is good, equipment costs, such as the material cost of the flow guide 20, are reduced significantly, and the manufacturing cost of the metal extrusion S is suppressed.

  Further, since the cross-sectional shape of the adjustment hole 21b of the flow guide 20B adjacent to the end face 22a of the die 22 is set larger than the cross-sectional shape of the forming hole 23 of the die 22, the extrusion material W is placed in the adjustment hole 21b. In FIG. 2, the width is sufficiently widened outwardly so as to cover the downstream molding hole 23 and the speed is adjusted, and then flows into the molding hole 23. Accordingly, the extrusion material W flows out uniformly from the entire molding hole 23, and the quality of the metal extruded material S extruded from the molding hole 23 is sufficiently secured.

  In particular, when manufacturing the metal extrudate S having a wide width and a thin plate shape as described above, the extrusion material W has a width in the adjustment hole 21b of the flow guide 20B adjacent to the end face 22a of the die 22. Since the width is sufficiently widened outward in the direction, it is possible to more surely prevent a plate thickness deficiency, a wavy material deficiency defect, etc. at both ends in the width direction of the metal extruded material S. The metal extrusion material S can be manufactured.

  Further, three flow guides 20 are provided, and among these flow guides 20, the adjustment holes 21 c of the flow guide 20 </ b> C arranged at the center in the extrusion direction E are flow guides arranged at both ends in the extrusion direction E. The cross-sectional shape orthogonal to the extrusion direction E is set larger than the adjustment holes 21a and 21b of 20A and 20B.

  Therefore, the material W for extrusion W adjusts the flow guide 20C disposed in the center in the extrusion direction E from the adjustment hole 21a of the flow guide 20A disposed on the feed plate 15 side in the extrusion direction E among these flow guides 20. When flowing toward the inside of the hole 21c, it is widened outward in the surface direction of the cross section orthogonal to the extrusion direction E. Next, when the fluid flows from the adjustment hole 21c of the central flow guide 20C toward the adjustment hole 21b of the flow guide 20B arranged on the die 22 side in the extrusion direction E, the inward (central ). Then, when the extrusion material W flows from the adjustment hole 21b of the flow guide 20B toward the molding hole 23 of the die 22, it is uniformly introduced into the entire molding hole 23.

  According to such a configuration, in the adjustment hole 21 of the flow guide 20, the cross-sectional shape of the extrusion material W is sufficiently reduced after being sufficiently increased so as to correspond to the shape of the forming hole 23 of the die 22. Transformed into Therefore, the extrusion material W does not stay in the adjustment hole 21 and efficiently flows into the molding hole 23. Therefore, excessive dead metal is reliably prevented from being generated in the adjustment hole 21, and the extrusion material W flows out uniformly from the entire molding hole 23, so that the quality of the metal extruded material S is greatly improved. It is done.

  Further, since the flow guide 20 is configured by combining a plurality of flow guides 20A, 20B, and 20C, the cross-sectional shape of the adjustment hole 21c at the center in the extrusion direction E is the adjustment holes 21a and 21b at both ends as described above. Even if it is set to be larger than the cross-sectional shape, it can be manufactured relatively easily.

  Further, since a heater block 26 having a heater 27 is provided as a heating means for heating at least the adjustment hole 21 of the flow guide 20 and the molding hole 23 of the die 22, before the start of extrusion, the adjustment hole 21 and The molding hole 23 can be sufficiently heated. Accordingly, even at the start of extrusion where a relatively large extrusion pressure is required, the extrusion material W disposed in the adjustment hole 21 and the molding hole 23 is easily plastically deformed by heating, and is relatively simple. The metal extruded material S can be extruded. Thereby, the quality metal extrusion material S can be manufactured from the initial stage of an extrusion process.

  In addition, since the extrusion material W is easily plastically deformed and does not require excessive extrusion pressure, the tools such as the die 22, the flow guide 20, and the feed plate 15 are prevented from being damaged. The Accordingly, the tool life is extended.

  Further, since the heater 25 is built in the backup ring 24A, it is possible to prevent heat from escaping from the die 22 or the flow guide 20 heated by the heater block 26 toward the outside downstream in the extrusion direction E. Is done. Therefore, the above-described heating by the heater block 26 can be performed efficiently.

  In the material guide passage 16 described above, there are slight gaps between the groove 11 and the abutment 17, and between the shoe 14 and the feed plate 15 and the outer peripheral surface of the rotating wheel 10. Therefore, the extrusion material W that has become plastic from the gap is extruded in a burr shape, and these burrs adhere to the inner surface of the groove 11 and the outer peripheral surface of the rotating wheel 10. Since these burrs are scraped off by the scraper 18 provided on the downstream side of the abutment 17, the metal extrudate S is manufactured stably over a long period of time without requiring the labor of the operator to remove the burrs. be able to.

  Moreover, according to the manufacturing method of the metal extrusion S which extrudes the raw material W for extrusion using the rotary wheel type continuous extrusion apparatus 1 comprised in this way, the high quality metal extrusion S is manufactured comparatively easily. can do.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the present embodiment, the cross-sectional dimension of the molding hole 23 is set to about 2.7 mm (F direction) × 50 mm (G direction), but is not limited thereto. Specifically, the aspect ratio (F direction: G direction) in the cross-sectional dimension of the molding hole 23 can be set to about 1:40. In this case, for example, the cross-sectional dimension of the molding hole 23 is 1 mm (F Direction) × 40 mm (G direction).

  More specifically, the cross-sectional dimension of the forming hole 23 is set in the range of 10 mm to 55 mm in the width direction (G direction), and is set in the range of 1 mm to 10 mm in the thickness direction (F direction).

  Moreover, in this embodiment, although the metal extrusion material S was made into the rectangular shape where the cross section orthogonal to the extrusion direction E was flat, it is not limited to this. That is, the metal extruded material S may have a flat oval shape or a polygonal plate shape other than those described above, and partially has a protruding portion or a recessed portion protruding from the outer periphery in the cross section. It may have a shape. However, in the case of the so-called expansion extrusion molding process in which the metal extruded material S is set in a flat and thin plate shape as in the present embodiment, the above-described effects are sufficiently obtained, which is more preferable.

  In the present embodiment, three flow guides 20 are provided. However, the flow guides 20 need only be provided in a plurality, and the present invention is not limited to this. Specifically, for example, two flow guides 20 may be provided and only the flow guides 20B and 20C may be provided. In this case, the cross-sectional dimension of the adjustment hole 21c of the flow guide 20C is preferably set to about 10 to 15 mm (F direction) × 65 mm (G direction).

  Further, the shape of the material guide hole 19 described above, the cross-sectional dimension of the outflow portion 19b in the material guide hole 19, and the shapes and cross-sectional dimensions of the adjustment holes 21a, 21b, and 21c of the flow guide 20 are limited to this embodiment. is not.

Further, in the present embodiment, the heater block 26 is provided as the heating means, but other heating means may be used. In other words, instead of using the heater block 26, for example, the forming hole 23 of the die 22 and the adjustment hole 21 of the flow guide 20 may be heated using a burner or the like.
Further, a temperature detecting means such as a thermocouple may be disposed in the vicinity of the die 22 so that the temperature detecting means is electrically connected to the control unit and the temperature of the heating is controlled.

DESCRIPTION OF SYMBOLS 1 Rotating wheel type continuous extrusion apparatus 10 Rotating wheel 11 Groove 14 Shoe 14a Shoe inner peripheral surface 15 Feed plate 15a Feed plate inner peripheral surface 15b Feed plate outer surface 16 Material guide passage 17 Abutment 19 Material guide hole 20 Flow guide 20A Flow guide (feed plate side)
20B Flow guide (die side)
20C flow guide (center)
21 Adjustment hole 21a Adjustment hole (feed plate side)
21b Adjustment hole (die side)
21c Adjustment hole (center)
22 Die 22a End face facing the upstream side of the die 23 Molding hole 26 Heater block (heating means)
E Extrusion direction of extrusion material W (metal extrusion material S) S Metal extrusion material W Extrusion material

Claims (5)

A material guide passage formed by covering a part of the groove formed on the outer peripheral surface of the rotating wheel with each inner peripheral surface of the shoe and the feed plate, and projecting in the groove so as to close the downstream end of the material guide passage An abutment formed in the feed plate and opened to the downstream end of the material guide passage; and disposed on the outer surface side opposite to the inner peripheral surface of the feed plate to the material guide hole. And a die formed with a molding hole to be communicated,
A rotary wheel type continuous extrusion device for extruding a material for extrusion introduced into the material guide passage from the forming hole to form a metal extruded material,
Between the feed plate and the die, a plurality of flow guides having adjustment holes communicating with the material guide holes and the forming holes are provided along the extrusion direction of the material for extrusion. Rotating wheel type continuous extrusion equipment. The rotary wheel type continuous extrusion device according to claim 1,
Among the flow guides, at least the adjustment hole of the flow guide adjacent to the end face facing the upstream side of the die is set to have a larger cross-sectional shape perpendicular to the extrusion direction than the forming hole. Rotating wheel type continuous extrusion equipment. The rotary wheel type continuous extrusion apparatus according to claim 1 or 2,
Three or more flow guides are provided,
Among these flow guides, the adjustment hole of the flow guide arranged at the center in the extrusion direction has a larger cross-sectional shape perpendicular to the extrusion direction than the adjustment holes of the flow guide arranged at both ends in the extrusion direction. A rotary wheel type continuous extrusion device characterized by being set. The rotary wheel type continuous extrusion device according to any one of claims 1 to 3,
A rotary wheel type continuous extrusion apparatus characterized in that a heating means for heating at least the adjustment hole of the flow guide and the forming hole of the die is provided. It is a manufacturing method of the metal extrusion material using the rotation wheel type continuous extrusion device according to any one of claims 1 to 4,
A material for extrusion made of a metal material is introduced into the material guide passage, pressed into the material guide hole of the feed plate from the downstream end of the material guide passage, and passed through the adjustment hole of the flow guide to form the die forming hole. A method for producing a metal extruded material, wherein the metal extruded material is molded into a cross-sectional shape corresponding to the molding hole by extruding from a metal.

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