JP2009131884A - Metal working apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal working apparatus capable of uniformly and effective cooling a metal body and locally forming a softened region in the metal working apparatus adopting a STSP (Severe Torsion Straining Process) method. <P>SOLUTION: The metal working apparatus is provided with: a heating part for heating a predetermined position of the meatal body made into a pillar shape; and a cooling part for cooling the metal body by providing adjacently to the heating part; and also a rotation operating part for rotating the metal body around a rotary shaft parallel to the longitudinal direction of the metal body and with which a metallic crystal of the metal body is micronized by applying shear stress by the rotation of the metal body by a rotation operating part to a softened region where is locally formed on the metal body by a heating part and a cooling part. The cooling part is provided with a cylindrical guide pipe which is annularly fixed concentrically to the metal body, so that a cooling fluid for cooling the metal body is circulated along the metal body from one end side toward the other end side of the guide pipe in the inside of the guide pipe. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a metal processing apparatus that applies a shear stress due to rotation to a metal body to refine the metal structure.

  One of the inventors of the present invention, as a new metal processing method that has not been used in the past, is to locally heat and soften a metal body and replace one non-softened portion sandwiching the softened portion with the other non-softened portion. In contrast, the inventors have invented a processing method in which shearing stress is applied to a softened portion by rotating or vibrating, and the crystal in the metal body is refined using the shearing stress (see, for example, Patent Document 1).

  In particular, a processing method in which shear stress is applied to a softened portion by rotating one non-softened portion with respect to the other non-softened portion is called a STSP (Severe Torsion Straining Process) method. A metal processing apparatus for processing a body is called an STSP apparatus.

  In the STSP device, a metal body that is a cylindrical columnar body is processed, a first cooling unit that cools the metal body along the longitudinal direction of the metal body, a heating unit that heats the metal body, and a metal body A second cooling unit for cooling, and heating the metal body with the heating unit, while locally cooling the softened region in which the metal body is softened by cooling the metal body with the first cooling unit and the second cooling unit. Is formed.

  In the heating unit, the metal body is heated using a high-frequency heating coil or the like, and in the first cooling unit and the second cooling unit, a cooling liquid such as water is brought into contact with the metal body and cooled.

  Further, the STSP apparatus is provided with a rotating device that rotates the metal body of one non-softened portion sandwiching the softened region with respect to the metal body of the other non-softened portion, and by rotating the metal body with the rotating device, Shear stress is applied to the metal body in the softened region.

  In particular, by forming the softened region as small as possible, the shear stress acting on the softened region can be increased so that the crystal of the metal body can be made finer. The first cooling unit and the second cooling unit provided with the heating unit interposed therebetween. By arranging the parts as close as possible, the softened region is made as small as possible.

Moreover, in the 1st cooling part and the 2nd cooling part, in order to cool a metal body effectively, water is injected toward the metal body.
No. 2004-028718

  However, when the diameter of the cylindrical metal body is increased in order to improve the production efficiency, water is sprayed from the periphery of the metal body to cool the water in the circumferential direction of the metal body. The area where the water is in contact and the area where the water is not in contact are likely to occur, resulting in poor cooling efficiency.

  Thus, an attempt has been made to enable more uniform cooling by increasing the number of injection ports through which water is injected, but the cooling non-uniformity has not been completely eliminated.

  Moreover, when water is sprayed from the injection port and cooled, the scattered water may reach the heating part and hinder the heating of the metal body, and the first cooling part and the second cooling part are brought close to each other. It has become difficult to arrange, and it has been difficult to locally form a softened region in the metal body.

  In view of the current situation, the present inventors have conducted research and development to make it possible to form a softened region locally so that even a metal body having a larger diameter can be uniformly and effectively cooled. It came to make invention.

  The metal processing apparatus of the present invention includes a heating unit that heats a predetermined position of the columnar metal body and a cooling unit that is provided adjacent to the heating unit to cool the metal body and is parallel to the longitudinal direction of the metal body. A rotating operation part that rotates the metal body around the rotation axis is applied, and shearing stress is applied to the softened area locally formed on the metal body by the heating part and the cooling part by the rotation of the metal body by the rotating operation part. In the metal processing apparatus for miniaturizing the metal crystal of the metal body, the cooling unit is provided with a cylindrical guide tube that is coaxially mounted on the metal body, and one end of the guide tube is provided inside the guide tube. From the side toward the other end side, the cooling liquid for cooling the metal body was circulated along the metal body.

Furthermore, the metal processing apparatus of the present invention is also characterized by the following points. That is,
(1) A moving means for moving the heating part and the cooling part along the longitudinal direction of the metal body is provided, and the cooling part is provided on the side opposite to the moving direction side of the heating part.
(2) A first support body having an insertion hole through which a metal body is inserted is provided at the end of the guide tube on the heating unit side, and an insertion hole through which the metal body is inserted at the other end of the guide tube And a second support body connected to a suction pipe that communicates with a suction device that sucks the cooling liquid in the guide tube, and the second support body is connected to the guide tube from the first support side. Aspirate liquid.
(3) The entire metal body is rotated when the shearing stress is applied to the softened region by rotating the metal body with the rotation operation unit.
(4) A rotation operation unit is composed of a first rotation mechanism unit that rotates a metal body on one side sandwiching the softened region formed on the metal body and a second rotation mechanism unit that rotates the metal member on the other side sandwiching the softened region. It is configured that the metal body is rotated in the same direction or in the opposite direction by changing the rotation speeds of the first rotation mechanism section and the second rotation mechanism section.
(5) Between the first support body and the second support body, a cylindrical outer pipe is provided around the guide pipe, and a cooling liquid is provided between the guide pipe and the outer pipe in the outer pipe. Supply supply piping is connected, and the cooling liquid is allowed to flow into the guide tube from the end of the guide tube on the first support side.
(6) The guide tube and the outer tube can be made of a transparent material.

  The metal processing apparatus of the present invention includes a heating unit that heats a predetermined position of the columnar metal body and a cooling unit that is provided adjacent to the heating unit to cool the metal body and is parallel to the longitudinal direction of the metal body. A rotating operation part that rotates the metal body around the rotation axis is applied, and shearing stress is applied to the softened area locally formed on the metal body by the heating part and the cooling part by the rotation of the metal body by the rotating operation part. In the metal processing apparatus for miniaturizing the metal crystal of the metal body, the cooling section is provided with a cylindrical guide tube that is coaxially mounted on the metal body, and one end of the guide tube is provided inside the guide tube. By allowing the cooling liquid for cooling the metal body to flow along the metal body from the side to the other end side, the cooling liquid can be uniformly contacted along the circumferential direction of the metal body. To cool the body evenly in the circumferential direction Kill.

  The metal processing apparatus according to the present invention includes a heating unit that heats a predetermined position of a columnar metal body having a predetermined length, and a cooling unit that is provided adjacent to the heating unit to cool the metal body, and heats the metal body. The softened region softened by heating by the part is locally formed, and the metal body is rotated by the rotation operation unit that rotates the metal body around the rotation axis parallel to the longitudinal direction of the metal body, so that the metal in the softened region portion Metallic crystals are refined by applying shear stress due to rotation to the body, and the present inventors have called an STSP device.

  In particular, the cooling section is provided with a cylindrical guide tube coaxially mounted on the metal body, and the metal body is cooled inside the guide tube from one end side to the other end side of the guide tube. The cooling liquid is circulated along the metal body.

  Therefore, in the cooling unit, the cooling liquid can be uniformly contacted along the circumferential direction of the metal body by the guide tube, so that the metal body can be uniformly cooled in the circumferential direction and the cooling effect can be improved. Can do.

  In addition, since the cooling liquid is guided by the guide tube, there is no possibility that the cooling liquid will be scattered on the metal body of the heating unit, and the first cooling unit or the second cooling unit is arranged close to the heating unit. The softened region can be formed more locally, and the effect of refining the metal crystal due to the shear stress can be improved. Note that the guide tube of the cooling section that is coaxially mounted on the metal body is only required to be in the state of being mounted on the metal body, and the distance from the outer peripheral surface of the metal body to the inner peripheral surface of the guide tube is It does not necessarily have to be uniform in the surface direction as long as the cooling liquid can be smoothly fed.

  A first support body having an insertion hole through which the metal body is inserted is provided at an end portion on the heating section side of the guide tube, and a first support body having an insertion hole through which the metal body is inserted is provided at the other end portion of the guide tube. Two supports are provided. The second support is connected to a discharge pipe that is connected to a suction device for sucking the cooling liquid in the guide tube, and the cooling liquid fed into the guide tube from the first support side is forcibly sucked. By doing so, the cooling liquid is circulated without causing retention, and the cooling efficiency by the cooling liquid is improved.

  FIG. 1 is a schematic explanatory diagram of a metal processing apparatus according to the present embodiment. The metal processing apparatus includes a first chuck 11 for fixing and supporting one end of a cylindrical metal body M having a predetermined length, a second chuck 12 for fixing and supporting the other end of the metal body M, and the first chuck 11. A heater 20 serving as a heating unit for heating a middle part of the metal body M fixed and supported in a substantially horizontal state by the first chuck 11 and the second chuck 12, and a heater 20 provided between the heater 20 to cool the metal body. A first cooler 21 and a second cooler 22 are provided. In the metal processing apparatus of this embodiment, a rotation motor 13 for rotating the second chuck 12 is provided, and the metal body M on the second chuck 12 side is rotatable with respect to the metal body M on the first chuck 11 side.

  In FIG. 1, 14 is a first chuck support base on which the first chuck 11 is mounted, and 15 is a second chuck support base on which the second chuck 12 is rotatably mounted and a rotation motor 13 is mounted. is there.

  The heater 20, the first cooler 21, and the second cooler 22 are mounted in a suspended manner on a support plate 23 having a predetermined shape provided at an upper position. In FIG. 1, reference numeral 23a is a connecting arm for mounting the first cooler 21 to the support plate 23 in a suspended manner, and 23b is a connecting arm for mounting the second cooler 22 to the support plate 23 in a suspended manner. is there.

  The support plate 23 can advance and retreat in the longitudinal direction of the metal body M along a guide rail 25 provided on a beam portion 24 arranged substantially parallel to the metal body M. In FIG. 1, reference numeral 26 denotes an arm provided for attaching the support plate 23 to the guide rail 25. In FIG. 1, 27 is a first support base that supports one end of the beam portion 24, and 28 is a second support base that supports the other end of the beam portion 24. The support plate 23 is moved along the guide rail 25 by, for example, arranging the rack in a longitudinal shape along the longitudinal direction of the guide rail 25 and providing a pinion that meshes with the rack at the base end portion of the arm 26. The support plate 23 movably mounted on the guide rail 25 may be movable by rotating the pinion with a drive motor or the like. Alternatively, a screw rod is provided along the longitudinal direction of the guide rail 25, and the screw rod is screwed into the base end portion of the arm 26, and the screw rod is rotated to support the guide rail 25 so as to be movably mounted. The plate 23 may be movable.

  The support plate 23 can be moved back and forth along the guide rail 25 provided parallel to the longitudinal direction of the metal body M, so that the support plate 23 can be moved back and forth in the longitudinal direction of the metal body M. The heater 20 mounted on the metal body M can be moved back and forth in the longitudinal direction of the metal body M. Therefore, by moving the support plate 23 forward and backward to position the heater 20 at a predetermined position of the metal body M, a softened region can be formed at a predetermined position of the metal body M, and at the same time, the support plate 23 is moved forward and backward as it is softened. The position of the area is movable.

  That is, in the metal processing apparatus, a softened region is formed in the metal body M by the heater 20 and the metal body M is rotated by the motor 13 for rotation, thereby applying a shear stress to the metal body in the softened region portion to form the metal crystal. In addition to miniaturization, by moving the position of the softened region by moving the support plate 23, the portion on which the shear stress acts is moved, so that the metal crystal can be continuously miniaturized along the longitudinal direction.

  In FIG. 1, reference numeral 29 denotes a temperature detector for measuring the temperature of the metal body M heated by the heater 20, which is attached to the support plate 23 in a suspended manner so as to be movable together with the heater 20.

  Further, the heater 20 of the present embodiment is a high-frequency heating coil that is wound around a metal body M, and an energization control unit (not shown) for energizing the high-frequency heating coil and a high-frequency heating coil are connected to required wiring ( (Not shown).

  As shown in FIG. 2, the first cooler 21 and the second cooler 22 that serve as cooling units are coolers having the same structure, using water as a cooling liquid, and bringing the water into contact with the metal body M. Cooling. In the present embodiment, the first cooler 21 and the second cooler 22 have the same structure. However, for example, only the cooling unit located on the opposite side of the moving direction of the heater 20 is the present invention. The other cooler may be a conventional cooling method.

  As described above, by providing the first cooler 21 and the second cooler 22 with the heater 20 interposed therebetween, a softened region can be locally formed in the metal body M by heating by the heater 20, but the softened region is reduced. The reason for locally forming is that the shearing stress generated by rotating the metal body M by the rotating motor 13 is concentrated and applied to the softened region, and if the purpose is met, the heater 20 is not necessarily sandwiched. Therefore, it is not necessary to provide the first cooler 21 and the second cooler 22, and only one of them may be provided. Specifically, as described above, when the heater 20 is moved in the longitudinal direction of the metal body M, and the heat conduction speed of the metal M body is not large compared to the movement speed of the heater 20, It is not always necessary to provide a cooling part on the moving direction side of the heater 20, and it is only necessary to provide a cooling part on the side opposite to the moving direction side of the heater 20.

  As shown in FIG. 3, the cooler includes a cylindrical guide tube 30 mounted around the metal body M, a first support 31 provided at an end of the guide tube 30 on the heater 20 side, and a guide tube 30. The second support 32 is provided at the other end of the first support 31 and a cylindrical outer peripheral tube 33 is provided around the guide tube 30 between the first support 31 and the second support 32. As shown in FIG. 2, the guide tube 30, the first support 31, the second support 32, and the outer peripheral tube 33 are connected to the guide tube 30 and the outer peripheral tube 33 by the first support 31 and the second support. The first support 31 and the second support 32 are connected to each other through the connecting rod 34 and firmly fixed and integrated. 2 and 3, reference numeral 35 denotes a fixing nut.

  The guide tube 30 is a cylindrical body in the present embodiment, and has a notch shape that allows cooling liquid water to flow into the guide tube 30 at the end on the first support 31 side, as shown in FIG. A plurality of inflow ports h are provided. The guide tube 30 is not limited to a cylindrical shape, but a cylindrical shape is desirable when the contact efficiency between water and the metal body M is taken into consideration. FIG. 4 shows a configuration in which the inlet h is provided in the guide tube 30, but a groove is formed in a notch shape in the contact portion of the guide tube 30 in the first support 31 to guide the water to the guide tube 30. It may be a flowing water channel that leads from the outside of 30 to the inside.

  The first support 31 is a metal flat plate provided with an insertion hole 31a through which the metal body M is inserted at the center. In particular, as shown in FIG. 3, the first support 31 is provided with a recess 31e into which the guide tube 30 and the outer peripheral tube 33 are inserted on the surface on the second support 32 side, and the bottom portion of the recess 31e is guided. As the tube support wall 31f, the end edges of the guide tube 30 and the outer tube 33 are brought into contact with each other. In addition, since the 1st support body 31 is arrange | positioned close to the heater 20, the water flow path 31b is provided in the inside of the 1st support body 31, and water supply to this water flow path 31b is shown in FIG. The pipe 31c and the drain pipe 31d are connected in communication to allow cooling water to flow, thereby enabling cooling. The first support 31 is not limited to metal, and may be formed of a material having high heat resistance such as ceramic.

  The second support 32 is also a metal flat plate provided with a through hole 32a through which the metal body M is inserted in the center, and the side surface of the second support 32 has a communication hole communicating with the insertion hole 32a. 32b is provided. The second support 32 is not limited to metal like the first support 31, and may be formed of an appropriate material.

  The outer peripheral pipe 33 is a cylindrical body in the present embodiment, and a water supply port 33a to which a supply pipe 36 for supplying water as a cooling liquid between the guide pipe 30 and the outer peripheral pipe 33 is connected to a predetermined position on the peripheral surface. Is provided. In FIG. 3, 36a is an auxiliary tool for attaching the supply pipe 36 to the water supply port 33a. In the present embodiment, the outer peripheral pipe 33 is provided with only one water supply port 33a, but a plurality of water supply ports 33a may be provided. Further, the outer peripheral tube 33 is not limited to a cylindrical shape, and may have an appropriate shape.

  The water supplied between the guide pipe 30 and the outer peripheral pipe 33 by connecting the supply pipe 36 to the water supply port 33a enters the guide pipe 30 from the inlet h provided on the first support 31 side of the guide pipe 30. It flows in and contacts the metal body M so that it can be cooled.

  In particular, in the first support 31, the end of the first support 31 of the guide tube 30 is brought close to the heater 20 by reducing the thickness of the guide tube support wall 31 f as much as possible. Since the metal body M can be cooled from a portion closer to the heater 20 by allowing water to flow into the guide tube 30 from the first support 31 while bringing the heater close to the heater 20, the softened region is formed more locally. Thus, the shear stress can be effectively applied.

  In addition, the first support 31 itself can be cooled with water used for cooling the metal body M, and it is possible to easily prevent thermal deformation or damage of the first support 31 due to radiant heat from the metal body M. .

  The communication hole 32b of the second support 32 is connected to a discharge pipe 37 that is connected to a suction device (not shown) that sucks water flowing into the guide tube 30 and sucks water in the guide tube 30. is doing. In FIG. 3, reference numeral 37a denotes an auxiliary tool for mounting the discharge pipe 37 to the communication hole 32b. In the present embodiment, a vacuum pump is used as the suction device, and water is separated through a gas-liquid separator (not shown) in the middle of the discharge pipe 37.

  Thus, by sucking the water flowing into the guide tube 30 with the suction device, the water that has become hot due to the heat of the metal body M is prevented from stopping in the guide tube 30 and the water is circulated smoothly. The cooling effect can be improved.

  In particular, since the guide tube 30 is wrapped around the metal body M, water, which is a cooling liquid, can be uniformly contacted along the circumferential direction of the metal body M, and the metal body M can be evenly distributed in the circumferential direction. Can be cooled.

  Moreover, since the water is circulated from the one end side to the other end side of the guide tube 30, it is possible to prevent the non-contact region where the water does not contact the metal body M from occurring, and to effectively make the metal body M. Can be cooled.

  Furthermore, water is smoothly fed into the guide tube 30 by flowing into the guide tube 30 from the inlet h of the guide tube 30 inserted into the recess 31e of the first support 31. Since water can be supplied into the guide tube 30, a sufficient amount of water can be supplied into the guide tube 30 to cool the metal body M reliably.

  Particularly, since the space between the guide tube 30 and the outer peripheral tube 33 can be used as a water absorption tank, it is possible to easily supply a sufficient amount of water into the guide tube 30.

  Further, by sucking the water flowing into the guide tube 30 with a suction device, the gap between the insertion hole 31a of the first support 31 and the metal body M, or the metal body M in the insertion hole 32a of the second support 32. It is possible to prevent water flowing into the guide tube 30 from leaking through the gap.

  Thus, since it is possible to prevent water from leaking out from the insertion hole 31a of the first support 31, it is possible to reliably prevent water from splashing toward the heater 30 and to inhibit the heating of the metal body M by the heater 30. The first support 31 and the second support 32 can be arranged as close to the heater 20 as possible. Accordingly, the heater 20 and the first cooler 21 and the second cooler 22 can form a softened region in the metal body M very locally, and a shear stress is locally applied to the softened region to cause crystal of the metal body. The refinement effect can be improved.

  In the present embodiment, the guide tube 30 and the outer peripheral tube 33 are each formed of a transparent material. Specifically, glass, heat resistant plastic, or the like can be used. When the guide tube 30 and the outer tube 33 are made of a transparent material, it is possible to visually check the movement of water inside the cooler. Can be detected and dealt with.

  As another embodiment, as shown in FIG. 5, the first chuck 11 that fixes and supports one end of the metal body M is also linked to the rotation motor 13a so that the first chuck 11 can rotate and rotate. The metal body M fixed and supported in a substantially horizontal state by the first chuck 11 and the second chuck 12 can be rotated by the second chuck 12 which can be rotated by the motor 13b. Here, in the present embodiment, the first chuck 11 and the rotation motor 13a constitute a first rotation mechanism, and the second chuck 12 and the rotation motor 13b constitute a second rotation mechanism. The rotation mechanism for rotating the metal body M is not limited to these, and any configuration may be used as long as the metal body M can be rotated.

  The rotation motor 13a for rotating the first chuck 11 and the rotation motor 13b for rotating the second chuck 12 are caused by rotating the metal body M in the same direction or in the opposite direction and by making the respective rotation speeds different. Shear deformation is caused in the softened region portion of the metal body M by the differential speed.

  For example, when the output of the rotation motor 13a that rotates the first chuck 11 is the rotation output that rotates the metal body M at 30 rpm, the output of the rotation motor 13b that rotates the second chuck 12 is The rotation output is rotated at 20 rpm. Therefore, the softened region portion of the metal body M is shear-deformed at 10 rpm, and the metal crystal is refined by the shear stress due to the shear deformation. At this time, the metal body M itself is rotating at least at 20 rpm.

  As described above, when the metal crystal is refined by applying a shear stress to the softened region portion of the metal body M, the first cooler 21 and the second cooler are rotated by rotating the entire metal body M. The temperature distribution of the metal body M caused by the cooling of the metal body M by 22 can be brought close to a concentric temperature distribution around the rotation axis of the rotating metal body M. In particular, in this case, since the heating of the metal body M by the heater 20 is also uniformed by the rotation of the metal body M, the temperature distribution of the metal body M is centered on the rotation axis of the rotating metal body M. It can be made closer to a concentric temperature distribution.

  Therefore, the distribution of the magnitude of the shear stress acting on the metal body M can also be a concentric distribution around the rotation axis of the rotating metal body M, and the shear stress is stable in the rotation direction of the metal body M. Therefore, it is possible to suppress the excessive deformation of the metal body M and stabilize the shape after the shear deformation.

  When the metal body rotated through the first chuck 11 and the metal body rotated through the second chuck 12 are rotated in opposite directions, a drive mechanism for rotating the metal body at a low speed is used. Even if it is used and rotated, the metal body can be subjected to shear deformation at a maximum of twice the number of rotations.

  The magnitude of the difference in rotational speed of the metal body M between the first rotation mechanism section and the second rotation mechanism section can be appropriately determined according to the material and the diameter of the metal body M.

  In the metal processing apparatus provided with the first rotation mechanism portion and the second rotation mechanism portion, the metal body M is mounted on the first chuck 11 and the second chuck 12, and the heating of the metal body M by the heater 20 starts. The metal body M is rotated by the rotation mechanism unit and the second rotation mechanism unit. At this time, the first rotation mechanism unit and the second rotation mechanism unit rotate the metal body M at the same rotation speed, respectively, and the metal body M is heated by the heater 20 to have a uniform temperature concentrically around the rotation axis. A distribution is generated. At this time, the first cooler 21 and the second cooler 22 have started cooling the metal body, and the heating by the heater 20 is localized.

  When the temperature detector 29 detects that the metal body M has been heated to a predetermined temperature by the heater 20, the metal processing apparatus starts moving the support plate 23 along the metal body M, and the first rotation mechanism section. The rotation speed of the metal body M is changed by at least one of the second rotation mechanism section and the rotation speed of the first rotation mechanism section and the second rotation mechanism section is different from each other. The shear deformation of the softened region portion of the body M is started.

  The metal body on the side opposite to the moving direction side of the support plate 23 is cooled to substantially room temperature by the first cooler 21 or the second cooler 22.

  The metal processing apparatus moves the support plate 23 by a predetermined distance, then stops heating by the heater 20, further moves the support plate 23 by a predetermined distance, and the metal body M heated by the heater 20 is moved. The first cooler 21 and the second cooler 22 are completely cooled.

  After cooling the metal body M, the metal processing apparatus stops the first cooler 21 and the second cooler 22 so that the metal body M can be taken out.

It is a schematic explanatory drawing of the metal processing apparatus which concerns on this invention. It is a principal part schematic explanatory drawing of the metal processing apparatus which concerns on this invention. It is explanatory drawing of a cooler. It is explanatory drawing of the inflow port provided in the guide pipe. It is principal part schematic explanatory drawing of the metal processing apparatus of other embodiment.

Explanation of symbols

M metal body
20 Heater
21 First cooler
22 Second cooler
23 Support plate
29 Temperature detector
30 guide tube
31 First support
31a Insertion hole
32 Second support
32a insertion hole
32b communication hole
33 Outer tube
33a Water inlet
34 Connecting rod
36 Supply piping
37 Discharge piping h Inlet

Claims (7)

A heating unit that heats a predetermined position of the columnar metal body, and a cooling unit that is provided adjacent to the heating unit to cool the metal body, and around a rotation axis that is parallel to the longitudinal direction of the metal body A rotation operation unit for rotating the metal body is provided, and a shearing stress is applied to the softened region locally formed on the metal body by the heating unit and the cooling unit by rotation of the metal body by the rotation operation unit. In the metal processing apparatus for refining the metal crystal of the metal body,
The cooling unit includes a cylindrical guide tube that is coaxially mounted on the metal body, and cools the metal body inside the guide tube from one end side to the other end side of the guide tube. A metal processing apparatus, wherein a cooling liquid to be circulated is circulated along the metal body.   The moving part which moves the said heating part and the said cooling part along the longitudinal direction of the said metal body is provided, The said cooling part was provided in the opposite side to the moving direction side of the said heating part. The metal processing apparatus as described. A first support body having an insertion hole through which the metal body is inserted is provided at the end of the guide tube on the heating unit side,
The other end of the guide tube is provided with a second support having an insertion hole through which the metal body is inserted,
The second support is connected to a discharge pipe communicating with and connected to a suction device for sucking the cooling liquid in the guide tube, and the cooling liquid fed into the guide tube is sucked from the first support side. The metal processing apparatus according to claim 2, wherein:   The metal processing apparatus according to claim 3, wherein the rotation operation unit rotates the entire metal body when rotating the metal body to apply a shear stress to the softened region. The rotation operation section includes a first rotation mechanism section that rotates a metal body on one side sandwiching the softened region formed on the metal body, and a second rotation mechanism section that rotates a metal body on the other side sandwiching the softening region. And
5. The metal processing apparatus according to claim 4, wherein the first rotation mechanism unit and the second rotation mechanism unit rotate the metal body in the same direction or in the opposite direction at different rotation speeds. . Between the first support body and the second support body, a cylindrical outer tube provided around the guide pipe is provided,
The outer pipe is connected to a supply pipe for supplying a cooling liquid between the guide pipe and the outer pipe,
5. The metal processing apparatus according to claim 3, wherein the cooling liquid is caused to flow into the guide tube from an end portion of the guide tube on the first support body side.   The metal processing apparatus according to claim 5, wherein the guide tube and the outer peripheral tube can be made of a transparent material.

Images