JP2009148829A - Rotary wheel type continuous extruding device and method of manufacturing metallic extruded material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the increase of the manufacturing cost of the metallic extruded material while suppressing the degradation in the quality of the metallic extruded material which is extruded in a rotary wheel type continuous extruding device. <P>SOLUTION: In the rotary wheel type continuous extruding device which is provided with a base stock guiding passage 16 which is formed by covering a part of a groove 11 formed on the outer peripheral surface of a rotary wheel 10 with the inner peripheral surface of a shoe 14 and a feed plate 15, an abutment 17 which is projected in the groove 11 to close the downstream end, 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 16 and a die 25 which is arranged on the side of the outside surface of the feed plate 15 and which forms a forming hole 27 which is made to communicate with the base stock guiding hole 19, an attachment 31 on which a hole part 32 with which the base stock guiding hole 19 and the forming hole 27 are communicated is formed is attached freely attachably and detachably on the feed plate 15 and a tapered surface 33 for smoothly connecting the base stock guiding hole 19 and the forming hole 27 is formed on the inner surface of the hole part 32. <P>COPYRIGHT: (C)2009,JPO&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 processing and a method for producing a metal extruded material using the same.

The rotary wheel type continuous extrusion apparatus is an apparatus for continuously producing a metal extruded material made of a metal material such as copper or copper alloy by extrusion. As a conventional rotary wheel type continuous extrusion apparatus, for example, one described in Non-Patent Document 1 is known.
In general, a rotary wheel type continuous extrusion apparatus has 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 of the material guide passage. The feed plate is arranged between the abutment projecting in the groove so as to close the end, the material guide hole formed in the feed plate and opened to the downstream end of the material guide path, and the rotating wheel. And a forming 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 material for extrusion is heated by friction and deformation, becomes plastic, is extruded from a forming hole of a die, is formed into a metal extruded material having a desired cross-sectional shape, and is sent out.
Tatsuya Togi and two others, “Technology for processing copper profiles by rotary continuous extrusion method”, Copper and Copper Alloy, Japan Copper and Brass Association, August 2005, Vol. 44, No. 1, p. 128-131

  By the way, in the said conventional rotary wheel type continuous extrusion apparatus, the cross-section flat rectangular metal extrusion material may be manufactured from the raw material for cross-section circular shape. In this case, since the material guide hole and the forming hole have greatly different cross-sectional shapes and dimensions, a part of the material guide hole opened to the die side is covered with the end face of the die. For this reason, when the raw material for extrusion passes through the raw material guide hole, it is blocked by the step portion between the feed plate and the die, and a dead metal is generated.

And when a part of this dead metal flows out from a shaping | molding hole with the raw material for extrusion used as a metal extrusion material, there exists a problem that it is caught in a metal extrusion material and the quality of a metal extrusion material falls.
In order to avoid this deterioration in quality, it is conceivable to individually manufacture the feed plate according to the shape of the die forming hole, but the feed plate is made of an expensive and difficult-to-cut nickel-based heat-resistant alloy. Therefore, the manufacturing cost of a metal extrusion material will become high.

  The present invention has been made in consideration of such circumstances, and a rotary wheel type continuous extrusion apparatus capable of suppressing deterioration in quality of a metal extruded material while suppressing an increase in manufacturing cost of the metal extruded material, and a metal using the same. It aims at providing the manufacturing method of an extrusion material.

  In order to achieve the above object by solving the above-mentioned problems, a rotary wheel type continuous extrusion apparatus according to the present invention includes a groove formed on the outer peripheral surface of a rotary wheel with a part of each inner periphery of a shoe and a feed plate. A material guide passage formed by covering with a surface, an abutment projecting in the groove so as to close the downstream end of the material guide passage, and an opening formed in the feed plate at the downstream end of the material guide passage And a die that is formed on the outer surface opposite to the inner peripheral surface of the feed plate and has a forming hole that communicates with the material guide hole. The feed plate includes the material guide hole. An attachment having a hole communicating with the hole and the forming hole is detachably attached, and the cross-sectional shape of the upstream opening of the hole facing the material guide hole is at least the material A cross-sectional shape of the downstream opening of the hole facing the molding hole is formed so as to be substantially equal to the molding hole, and the inner surface of the hole is formed on the upstream side. It has a taper surface which smoothly connects a side opening and the downstream opening.

  And the manufacturing method of the metal extrusion material which concerns on this invention uses a rotary wheel type | mold continuous extrusion apparatus, Comprising: The raw material for extrusion consisting of a metal material is the raw material of the said feed plate from the downstream end side of the said material guide channel | path. Press fitting into the guide hole, passing through the hole portion of the attachment and extruding from the molding hole of the die, it is formed into a cross-sectional shape corresponding to the molding hole.

  According to the rotary wheel type continuous extrusion apparatus and the metal extrusion material manufacturing method, since the cross-sectional shape of the upstream side opening of the hole is formed to be larger than the material guide hole, the material for extrusion is fed. When being pushed out from the material guide hole of the plate to the hole of the attachment, it is not blocked by the attachment. Then, by forming the tapered surface on the inner surface of the hole, it is possible to prevent the extrusion material from being dammed up until it reaches the downstream opening from the upstream opening of the hole.

In addition, since the cross-sectional shape of the downstream opening substantially matches the shape of the forming hole, it is possible to suppress the occurrence of dead metal before the extrusion material reaches the forming hole from the material guide hole. It is possible to prevent quality deterioration of the extruded metal material.
Moreover, since it is only necessary to manufacture and replace the attachment so as to correspond to the molding holes of various shapes, it becomes possible to manufacture metal extrusion materials of various shapes without replacing expensive feed plates. Therefore, the increase in the manufacturing cost of a metal extrusion material can be suppressed.

Further, in the rotary wheel type continuous extrusion apparatus, a bottomed accommodation hole for accommodating the attachment is formed on the outer surface of the feed plate facing the upstream opening side, and the material is formed on the bottom surface of the accommodation hole. The guide hole may be opened.
Since the attachment is accommodated in the feed plate in this way, it is not necessary to secure an area for attaching the attachment to the feed plate die. Can be planned.
Moreover, since the volume of the attachment can be kept small, the material used for manufacturing the attachment can be reduced, and the manufacturing cost of the metal extruded material can be further reduced.

Furthermore, in the rotary wheel type continuous extrusion apparatus, the attachment is preferably formed of hot tool steel having a tempering temperature of 550 ° C. or higher and 700 ° C. or lower and a hardness of HRC 50 or higher.
That is, the material for extrusion is heated to about 300 ° C. when entering the material guide hole from the downstream end of the material guide passage. By forming the attachment with the hot tool steel described above, it is possible to manufacture the metal extruded material. On the other hand, sufficient heat resistance can be secured. Moreover, since hot tool steel is cheaper and easier to process than nickel-base heat-resistant alloys, the manufacturing cost of the metal extruded material can be further reduced. Note that the hardness of the attachment may be measured using a Rockwell hardness meter after tempering the attachment material within the above-described temperature range.

  ADVANTAGE OF THE INVENTION According to this invention, while providing the attachment which can be attached or detached to a feed plate, while being able to prevent the quality deterioration of a metal extrusion material, the increase in the manufacturing cost of a metal extrusion material can also be suppressed.

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 disposed in the groove 11 and is pulled by the rotation wheel 10 by the rotational drive of the rotary wheel 10 and the frictional force between the groove 11 and the extrusion material W and sent in the A direction. It is configured to go.

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 14a 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.
Therefore, the material guide passage 16 that guides the material W for extrusion 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 14a of the shoe 14, and the inner peripheral surface 15a of the feed plate 15. Is formed.

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 rotary wheel 10 (a lower portion of the inner peripheral surface 15a in FIGS. 1 and 2).
As shown in FIGS. 2 and 3, the abutment 17 protrudes into the groove 11 so as to block the downstream end of the material guide passage 16 and is disposed with a slight gap from the inner surface of the groove 11. At the downstream end of 16, the extrusion material W is dammed up at the central portion excluding the vicinity of the inner surface of the groove 11.

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

As shown in FIGS. 1 to 4, the above-described feed plate 15 has an arrow E in which a 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. A material guide hole 19 penetrating in the direction is formed. That is, the material guide hole 19 is opened on the downstream end side of the material guide passage 16.
The feed plate 15 is formed with a bottomed receiving hole 20 which is recessed from a surface 15b opposite to the inner peripheral surface 15a (hereinafter referred to as "outer surface 15b"). It opens to the bottom surface 20 a of the hole 20. The cross section of the accommodation hole 20 orthogonal to the E direction is equal to the longitudinal direction (F direction) of the material guide hole 19 and the inner peripheral surface 15 a of the feed plate 15, and moreover the inner peripheral surface 15 a than the material guide hole 19. It has a flat rectangular shape that is long in the width direction (G direction).

The material guide hole 19 is formed so that a cross section orthogonal to the E direction is formed in a substantially rectangular shape, and is formed so as to be recessed from the inner surface of the through hole 21, and the accommodation hole 20 from the inner peripheral surface 15 a side of the feed plate 15. A pair of widened taper surfaces 22 that gradually spread in the lateral width direction (G direction) of the inner peripheral surface 15a as it goes toward the bottom surface 20a of the inner peripheral surface 15a.
Here, since the pair of widened tapered surfaces 22 are formed from the middle part of the through hole 21 along the E direction to the bottom surface 20a of the accommodation hole 20, the opening of the material guide hole 19 with respect to the inner peripheral surface 15a of the feed plate 15 is performed. The portion is formed in a shape equal to the cross-sectional shape of the through hole 21.

Further, the pair of widened taper surfaces 22 are formed so as to be smaller than the vertical width dimension of the through hole 21 and spread from the through hole 21 in the horizontal width direction. Therefore, the opening portion of the material guide hole 19 in the bottom surface 20a of the accommodation hole 20 is formed in a substantially cross shape. Note that the width dimension of the pair of widened tapered surfaces 22 on the bottom surface 20 a of the accommodation hole 20 is set to be smaller than the width dimension of the bottom surface 20 a of the accommodation hole 20.
From the above, the cross-sectional shape of the material guide hole 19 differs between the opening portion with respect to the inner peripheral surface 15a of the feed plate 15 and the opening portion with respect to the bottom surface 20a of the accommodation hole 20.

As shown in FIGS. 1 to 3, a die 25 and a plurality of backup rings 26 are sequentially arranged in the E direction on the outer surface 15 b of the feed plate 15. The dice 25 and the plurality of backup rings 26 are each formed in a disk shape, and are held in the housing 13 in a positioned state, like the feed plate 15.
The die 25 is disposed so as to sandwich the feed plate 15 between the die 25 and the rotary wheel 10. The die 25 is formed with a forming hole 27 penetrating in the E direction from a position corresponding to the material guide hole 19, and the extruded material W has a desired cross-sectional shape by passing through the forming hole 27. It is configured to be molded into S and delivered in the E direction. The cross section of the forming hole 27 orthogonal to the E direction is longer in the G direction than the cross sectional shape of the through hole 21 of the feed plate 15 and is further flat in the vertical width direction (F direction) orthogonal to the G direction. Thus, the metal extruded material S formed through the forming hole 27 has a flat plate shape.

  The plurality of backup rings 26 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 25 is transmitted to and supported by the housing 13. Further, the plurality of backup rings 26 are provided with respective ring holes 26 a of passages for guiding the metal extruded material S fed from the forming holes 27 in the E direction at positions corresponding to the forming holes 27.

Further, as shown in FIGS. 2 to 5, an attachment 31 made of hot tool steel having a tempering temperature of 550 ° C. or more and 700 ° C. or less and a hardness of HRC 50 or more is provided in the accommodation hole 20 of the feed plate 15 described above. Removably attached. The attachment 31 is obtained, for example, by quenching hot tool steel SKD61. The attachment 31 is formed with a hole 32 that penetrates in the E direction and communicates the material guide hole 19 and the forming hole 27.
Here, the cross section of the upstream opening 32 a of the hole 32 facing the material guide hole 19 is formed in a substantially rectangular shape so as to include the cross section of the substantially cross-shaped material guide hole 19. Specifically, the cross-sectional shape of the upstream opening 32 a is equal to the vertical width direction of the through hole 21 and the accommodation hole 20 of the feed plate 15, and the width dimension of the pair of widened tapered surfaces 22 on the bottom surface 20 a of the accommodation hole 20. It is formed to be equal to. Further, the cross section of the downstream opening 32 b of the hole 32 facing the molding hole 27 is formed so as to coincide with the cross-sectional shape of the molding hole 27.

The inner surface of the hole 32 has a pair of tapered taper surfaces 33 that gradually narrow in the F direction as it goes from the upstream opening 32a to the downstream opening 32b. The upstream opening 32a and the downstream opening 32b having different shapes are smoothly connected. In addition, the horizontal width dimension of the hole 32 is formed equally over the E direction. That is, in this embodiment, the lateral width dimension of the pair of widened tapered surfaces 22 and the lateral dimension of the molding hole 27 on the bottom surface 20a of the accommodation hole 20 are formed to be equal.
The attachment 31 configured as described above is fixed in a pressed state via the backup ring 26 so that no gap is generated between the feed plate 15 and the die 25.

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.
1 and 2, 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 pressed into the material guide hole 19 of the feed plate 15 while undergoing plastic deformation due to friction and deformation heating, passes through the hole portion 32 of the attachment 31, and passes through the forming hole 27 of the die 25. By being extruded in the direction, it is formed into a flat metal extrusion S corresponding to the shape of the forming hole 27.
Here, the extrusion material W is heated to about 300 ° C. when entering the material guide hole 19 from the downstream end of the material guide passage 16. As described above, the attachment 31 has a tempering temperature of 550 ° C. or more and 700 ° C. Since it has a sufficient heat resistant strength below this temperature, a sufficient heat resistant strength for the production of the metal extruded material S can be secured.

Since the cross section of the upstream opening 32 a in the hole 32 of the attachment 31 is larger than the cross section of the material guide hole 19 of the feed plate 15, the extrusion material W is pushed out from the material guide hole 19 into the hole 32. In this case, the attachment 31 is not blocked by the attachment 31.
Further, by forming the inner surface of the hole 32 with the tapered taper surface 33, there is no step portion before reaching the downstream opening 32 b from the upstream opening 32 a of the hole 32. Can be prevented from reaching the downstream opening 32b from the upstream opening 32a.

Furthermore, since the cross-sectional shape of the downstream opening 32b of the hole 32 also matches the cross-sectional shape of the forming hole 27 of the die 25, the extrusion material W is pushed out from the hole 32 into the forming hole 27. It is not blocked by the die 25.
And the raw material W for extrusion deform | transforms so that it may be gradually expanded in a G direction in the raw material guide hole 19 which has the wide taper surface 22, as it goes to the hole part 32. As shown in FIG. Thereafter, the hole 32 having the tapered tapered surface 33 is deformed so as to be gradually narrowed in the F direction as it goes toward the forming hole 27. That is, when the material W for extrusion passes through the material guide hole 19 and the hole portion 32, it continues from the cross-sectional shape at the opening portion of the material guide hole 19 to the inner peripheral surface 15 a of the feed plate 15 to the cross-sectional shape at the molding hole 27. Will be transformed.

  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 the form of burrs, 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.

As explained above, according to the rotary wheel type continuous extrusion apparatus 1 in the present embodiment,
Since the extrusion material W is not dammed after being pressed into the material guide hole 19 until it is extruded from the forming hole 27, it is possible to suppress the occurrence of dead metal and to prevent the quality of the metal extruded material S from deteriorating. Can do.
Moreover, since the attachment 31 for preventing the quality deterioration of the metal extruded material S is detachably attached to the feed plate 15, the attachment 31 is not limited to the above-described forming hole 27 having a cross-sectional shape, and corresponds to the forming hole 27 having various shapes. The attachment 31 may be manufactured and replaced as described above. Therefore, it is possible to manufacture the metal extruded material S having various cross-sectional shapes without replacing the expensive feed plate 15, and as a result, it is possible to suppress an increase in the manufacturing cost of the metal extruded material S.

Further, since the attachment 31 can be reduced to a volume that is small enough to be accommodated in the accommodation hole 20 of the feed plate 15 and the material used for the production can be reduced, the hot tool steel that is cheaper and easier to process than the feed plate 15 can be obtained. Therefore, the manufacturing cost of the metal extruded material S can be particularly reduced.
In addition, since the attachment 31 is accommodated in the feed plate 15, it is not necessary to secure a region for attaching the attachment 31 between the feed plate 15 and the die 25, so that the rotary wheel type continuous extrusion device 1 is configured in a compact manner. Thus, the size can be reduced.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the cross-sectional shape of the upstream opening 32 a of the hole portion 32 may be at least as large as the material guide hole 19 that opens to the bottom surface 20 a of the receiving hole 20. You may form so that it may correspond.

  Further, if the amount of dead metal generated is suppressed to such an extent that the quality of the metal extruded material S can be guaranteed, the vertical width dimension of the downstream opening 32b is formed larger than the vertical width dimension of the forming hole 27. Good. That is, there may be a slight level difference (for example, 5 mm or less) in the F direction between the downstream opening 32 b of the hole 32 and the molding hole 27. In this case, the inclination angle of the tapered tapered surface 33 with respect to the E direction can be reduced to improve the strength of the attachment 31.

  Furthermore, although the wide taper surface 22 is formed on the feed plate 15, it may be formed on the attachment 31, for example. In this case, since the material guide hole 19 can be formed only by the simple through-hole 21, the shape of the feed plate 15 can be further simplified, its manufacturing cost can be reduced, and its versatility can be enhanced. Further, for example, only the widened taper surface 22 may be formed on the attachment 31 and the tapered taper surface 33 may be formed on the feed plate 15.

  Further, the widened taper surface 22 and the tapered taper surface 33 are formed as a pair. For example, only one each is formed, and the inner surfaces facing the widened taper surface 22 and the tapered taper surface 33 are formed in parallel with the E direction. May be. However, forming the pair of the wide taper surface 22 and the tapered taper surface 33 can reduce the inclination angle of the individual wide taper surface 22 and the taper taper surface 33 with respect to the E direction. The flow velocity distribution of the extrusion material W toward the holes 27 can be made uniform.

  Furthermore, the cross-sectional shapes of the material guide hole 19 and the molding hole 27 are not limited to those of the above-described embodiment, and may be at least different from each other. Therefore, the inner surface of the hole 32 of the feed plate 15 is not limited to the widened taper surface 22 or the tapered taper surface 33, and at least the upstream opening 32 a having a cross-sectional shape corresponding to the material guide hole 19, and molding What is necessary is just to have the taper surface which connects smoothly the downstream opening part 32b of the cross-sectional shape corresponding to the hole 27. FIG.

It is a schematic side view which shows the structure of the rotary wheel type continuous extrusion apparatus which concerns on one Embodiment of this invention. FIG. 2 is an enlarged side sectional view showing a feed plate, a flow guide, and a die in the rotary wheel type continuous extrusion apparatus of FIG. 1. It is XX arrow sectional drawing of FIG. It is the rear view which looked at the feed plate in FIG.2, 3 from the outer surface side. It is the rear view which looked at the state which attached the attachment to the accommodation hole of the feed plate of FIG. 4 from the outer surface side of the feed plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating wheel type continuous extrusion apparatus 10 Rotating wheel 11 Groove 14 Shoe 14a Inner peripheral surface 15 Feed plate 15a Inner peripheral surface 16 Material guide passage 17 Abutment 19 Material guide hole 20 Accommodating hole 20a Bottom surface 25 Die 27 Molding hole 31 Attachment 32 Hole Portion 32a Upstream opening 32b Downstream opening 33 Tapered taper surface

Claims (4)

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. In a rotary wheel type continuous extrusion apparatus provided with a die formed with a molding hole to be communicated,
The feed plate is detachably attached with an attachment that forms a hole communicating the material guide hole and the molding hole,
The cross-sectional shape of the upstream opening of the hole facing the material guide hole is formed to be at least as large as the material guide hole,
The cross-sectional shape of the opening on the downstream side of the hole facing the molding hole is formed so as to substantially match the molding hole,
The inner surface of the hole has a tapered surface that smoothly connects the upstream opening and the downstream opening. A bottomed accommodation hole for accommodating the attachment is formed on the outer surface of the feed plate facing the upstream opening side,
The rotary wheel type continuous extrusion apparatus according to claim 1, wherein the material guide hole is opened at a bottom surface of the accommodation hole.   The rotating wheel type continuous extrusion apparatus according to claim 1 or 2, wherein the attachment is made of hot tool steel having a tempering temperature of 550 ° C or higher and 700 ° C or lower and a hardness of HRC50 or higher. 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 3,
An extrusion material made of a metal material is press-fitted into the material guide hole of the feed plate from the downstream end side of the material guide passage, and is passed through the hole of the attachment and pushed out from the molding hole of the die. A method for producing a metal extruded material, characterized in that the metal extruded material is formed into a cross-sectional shape corresponding to the above.

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