US20150174631A1 - Device and method for drawing metal tube - Google Patents

Device and method for drawing metal tube Download PDF

Info

Publication number
US20150174631A1
US20150174631A1 US14/241,163 US201214241163A US2015174631A1 US 20150174631 A1 US20150174631 A1 US 20150174631A1 US 201214241163 A US201214241163 A US 201214241163A US 2015174631 A1 US2015174631 A1 US 2015174631A1
Authority
US
United States
Prior art keywords
plug
time
metal blank
blank tube
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/241,163
Other languages
English (en)
Inventor
Hidekazu Sakihama
Nobuhiko Hisata
Keiichi Oinuma
Seiji Miyazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Showa Denko KK filed Critical Showa Denko KK
Assigned to SHOWA DENKO K.K. reassignment SHOWA DENKO K.K. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HISATA, NOBOHIKO, OINUMA, KEIICHI, SAKIHAMA, HIDEKAZU, MIYAZAKI, SEIJI
Assigned to SHOWA DENKO K.K. reassignment SHOWA DENKO K.K. CORRECTIVE ASSIGNMENT TO CORRECT THE SECOND ASSIGNOR'S NAME SHOULD APPEAR AS HISATA, NOBUHIKO PREVIOUSLY RECORDED ON REEL 033124 FRAME 0429. ASSIGNOR(S) HEREBY CONFIRMS THE ENTIRE INTEREST. Assignors: HISATA, NOBUHIKO, OINUMA, KEIICHI, SAKIHAMA, HIDEKAZU, MIYAZAKI, SEIJI
Publication of US20150174631A1 publication Critical patent/US20150174631A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/16—Mandrels; Mounting or adjusting same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/28—Carriages; Connections of grippers thereto; Grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C9/00—Cooling, heating or lubricating drawing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C9/00—Cooling, heating or lubricating drawing material
    • B21C9/005—Cold application of the lubricant
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/10—Bases for charge-receiving or other layers
    • G03G5/102—Bases for charge-receiving or other layers consisting of or comprising metals

Definitions

  • uncut tubes suitable for mass production has been used widely.
  • an ED tube obtained by drawing an aluminum extruded blank tube.
  • Such an ED tube is suitable for mass production in that a plurality of tube products can be produced in a single drawing process, and the method has attracted attention as a method which can meet the need of mass consumption caused by market expansion.
  • a core for evenly spreading the lubricating oil adhered to the inner surface of the blank tube is attached to the rod (Patent Documents 1 and 2).
  • Patent Document 1 Japanese Unexamined Laid-opened Patent Application Publication No. 2009-22982
  • Patent Document 2 Japanese Unexamined Laid-opened Patent Application Publication No. 2009-45663
  • the present invention was made in view of the aforementioned technical background, and aims to provide a drawing device and a drawing method for a metal tube capable of sufficiently applying a lubricating oil to an inner surface of the tube at the time of drawing to prevent occurrence of seizures.
  • the present invention provides the following means.
  • a device for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising a control unit configured to:
  • control to initiate drawing when the measured elapsed time is within a preset allowed time.
  • a device for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising a control unit configured to:
  • a device for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising a control unit configured to:
  • control unit is configured to:
  • control to initiate drawing when the measured second elapsed time is within the preset second allowed time.
  • control unit is configured to:
  • control to initiate drawing when the measuring second elapsed time is within the preset second allowed time at a time at which the metal blank tube is set at a pulling position between the die and the plug and becomes ready to be drawn.
  • a device for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising a control unit configured to:
  • control unit is configured to:
  • control to initiate drawing when the measured second elapsed time is within the second allowed time.
  • a device for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising a control unit configured to:
  • control unit is configured to:
  • control to perform drawing when the measured second elapsed time is within a preset second allowed time.
  • a method for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising:
  • a method for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising:
  • a method for drawing a metal tube in which drawing is performed by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising:
  • a method for producing a metal tube by performing drawing by making a metal blank tube pass through between a die for forming an outer surface and a plug for forming an inner surface comprising:
  • the effects in the case of performing a drawing process by drawing a metal blank tube in a horizontal direction are explained for an easy understanding of the effects of the invention (that is, the effects are explained by focusing on whether or not an amount of a lubricating oil is enough on an upper side of an inner surface of a blank tube).
  • the present invention is not especially limited to the case in which a drawing process is performed by drawing in a horizontal direction.
  • a control unit is provided.
  • the control unit is configured to: measure an elapsed time from a time at which supplying of a lubricating oil to a surface of the plug is stopped until the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn; control to not perform drawing of the metal blank tube when the measured elapsed time exceeds a preset elapsed time; and control to initiate the drawing when the measured elapsed time is within a preset allowed time.
  • a control unit is provided.
  • the control unit is configured to: initiate a measurement of an elapsed time from a time at which supplying of a lubricating oil to a surface of the plug is stopped; control to stop an operation of the drawing device when a measuring elapsed time exceeds a preset allowed time during a period of time from an initiation of the measurement until the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn or at a time at which it becomes ready to be drawn; and control to initiate drawing when the measuring elapsed time is within the preset allowed time at a time at which the metal blank tube is set at a pulling position between the die and the plug and becomes ready to be drawn.
  • the operation of the device is stopped when the elapsed time exceeds the allowed time during a period of time until it becomes ready to be drawn, or at a time at which it becomes ready to be drawn. Further, drawing is performed for a blank tube in which the elapsed time until it becomes ready to be drawn is within the allowed time and there exists a sufficient amount of lubricating oil on the upper side of the inner surface of the blank tube.
  • the operation of the device can be stopped when an amount of the lubricating oil carried into the metal blank tube from the plug is not sufficiently secured, and the operation of the device can be continued as it is when an amount of the lubricating oil carried into the metal blank tube from the plug is sufficiently secured.
  • control unit is configured to: also measure a second elapsed time from a time at which supplying of a lubricating oil to a surface of the plug is stopped or at a time at which the plug is inserted into the metal blank tube until the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn; control to not perform drawing of the metal blank tube when the measured second elapsed time exceeds a preset second allowed time; and control to initiate drawing when the measured second elapsed time is within a preset second allowed time.
  • the operation of the device can be stopped when an amount of the lubricating oil carried into the metal blank tube from the plug is not sufficiently secured, and the operation of the device can be continued as it is when an amount of the lubricating oil carried into the metal blank tube from the plug is sufficiently secured.
  • the operation of the device can be stopped when it exceeds the first allowed time during a period of time until the plug is inserted into the blank tube or at a time at which the plug is inserted into the blank tube and therefore an amount of the lubricating oil carried into the metal blank tube from the plug cannot not be sufficiently secured.
  • the operation of the device can be continued as it is.
  • the operation of the device when it exceeds the first allowed time during a period of time until the plug is inserted into the blank tube or at a time at which the plug is inserted into the blank tube and an amount of the lubricating oil carried into the metal blank tube from the plug cannot be sufficiently secured, the operation of the device can be stopped. When an amount of the lubricating oil carried into the metal blank tube from the plug is sufficiently secured, the operation of the device can be continued as it is.
  • an elapsed time is measured from a time at which supplying of the lubricating oil to the surface of the plug is stopped until the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn, it is controlled to not perform drawing of the metal blank tube when the measured elapsed time exceeds the preset allowed time, and drawing is performed when the measured elapsed time is within the preset allowed time. Therefore, for a blank tube in a state in which it took time (it exceeded the allowed time) until it becomes ready to be drawn and the amount of the lubricating oil on the upper side of the inner surface of the blank tube has decreased, it is possible to not perform drawing.
  • a measurement of an elapsed time is initiated from a time at which supplying of the lubricating oil to the surface of the plug is stopped, it is controlled to stop the operation of the device when the measuring elapsed time exceeds the preset allowed time during a period of time from the initiation of the measurement until the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn, or at a time at which it becomes ready to be drawn.
  • Drawing is performed when the measuring elapsed time is within the preset allowed time at a time at which the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn.
  • the operation of the device is stopped when the allowed time has exceeded during a period of time until it becomes ready to be drawn, or at a time at which it becomes ready to be drawn.
  • drawing is performed for a blank tube in which the elapsed time until it becomes ready to be drawn is within the allowed time and there exists a sufficient amount of lubricating oil on the upper surface of the inner surface of the blank. Therefore, a drawn tube having no seizures can be produced (a drawn tube having seizures will not be formed).
  • a first elapsed time is measured from a time at which supplying of the lubricating oil to the surface of the plug is stopped until the plug is inserted into the metal blank tube, and it is controlled to stop the operation of the device when the measured first elapsed time exceeds the preset first allowed time, and the operation of the device is continued when the measured first elapsed time is within the first allowed time. Therefore, the operation of the device can be stopped when the amount of the lubricating oil carried into the metal blank tube from the plug is not sufficiently secured, and the operation of the device can be continued as it is when the amount of the lubricating oil carried into the metal blank tube from the plug is sufficiently secured.
  • the operation of the device can be stopped when the amount of the lubricating oil carried into the metal blank tube from the plug is not sufficiently secured. And the operation of the device can be continued as it is when the amount of the lubricating oil carried into the metal blank tube from the plug is sufficiently secured.
  • the measuring second elapsed time exceeds the second allowed time during a period of time until it becomes ready to be drawn, or at a time at which it becomes ready to be drawn, the amount of the lubricating oil on the upper side of the inner side of the blank tube becomes insufficient. Therefore, the operation of the device is stopped to not perform drawing of the blank tube.
  • drawing is performed for a blank tube in which the measuring second elapsed time is within the second allowed time and there exists a sufficient amount of the lubricating oil on the upper side of the inner surface thereof at a time at which the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn. Therefore, a drawn tube having no seizures can be produced (a drawn tube having seizures will not be formed).
  • the operation of the device can be stopped when it exceeds the first allowed time during a period of time until the plug is inserted into the blank tube or at a time at which the plug is inserted into the blank tube, and the amount of the lubricating oil carried into the metal blank tube from the plug cannot be sufficiently secured. And the operation of the device can be continued as it is when the amount of the lubricating oil carried into the metal blank tube from the plug is sufficiently secured.
  • the operation of the device when it exceeds the first allowed time during a period of time until the plug is inserted into the blank tube or at a time at which the plug is inserted into the blank tube, the operation of the device can be stopped. When the amount of the lubricating oil carried into the metal blank tube from the plug is sufficiently secured, the operation of the device can be continued as it is.
  • the measuring second elapsed time exceeds the second allowed time during a period of time until it becomes ready to be drawn or at a time at which the tube becomes ready to be drawn, since the amount of the lubricating oil on the upper side of the inner side of the blank tube is insufficient, drawing is not performed.
  • drawing is performed for a blank tube in which the measuring second elapsed time is within the second allowed time and there exists a sufficient amount of lubricating oil on the upper side of the inner surface thereof at a time at which the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn. Therefore, a drawn tube having no seizures can be produced (a drawn tube having seizures will not be formed).
  • a metal tube is produced by measuring an elapsed time from a time at which supplying of the lubricating oil to the surface of the plug is stopped until the metal blank tube is set at a drawing position between the die and the plug and becomes ready to be drawn, controlling to not perform drawing the metal blank tube when the measured elapsed time exceeds the preset allowed time, and performing drawing when the measured elapsed time is within the preset allowed time. Therefore, for a blank tube in a state in which it took time (it exceeded the allowed time) and becomes ready to be drawn and the mount of the lubricating oil on the upper side of the inner surface of the blank tube has decreased, it is possible to not perform drawing.
  • FIG. 1 is a front vertical cross-sectional view showing a portion of an embodiment of a drawing device according to the present invention.
  • FIG. 2 ( a ) is a cross-sectional view showing a state in which a lubricating oil is being applied to a surface of a plug
  • FIG. 2 ( b ) a cross-sectional view showing a state in which supplying of the lubricating oil to the surface of the plug is stopped
  • FIG. 2 ( c ) a cross-sectional view showing a state in which an insertion of the plug into the metal blank tube is initiated.
  • FIG. 3 ( a ) is a cross-sectional view showing a state in which the insertion and the arrangement of the plug into the metal blank tube is finished
  • FIG. 3 ( b ) is a cross-sectional view showing a state in which the metal blank tube is set at a drawing position between the die and the plug, the front end of the blank tube is chucked, and the tube has become available to be drawn.
  • FIG. 4 is a flow chart showing an example of a drawing method.
  • FIG. 5 is a flow chart showing another example of a drawing method.
  • FIG. 6 is a flow chart showing still another example of a drawing method.
  • FIG. 1 is a schematic view shown by a vertical cross-section and showing a portion of an example of a drawing device 1 for carrying out a drawing method for a metal tube according to the present invention (schematic view showing a state in which the tube is being drawn).
  • the drawing method and the drawing device 1 according to this embodiment perform a drawing process by drawing a metal blank tube 2 in a horizontal direction, but not especially limited to such an embodiment, and can perform a drawing process by drawing in a vertical direction, for example.
  • the drawing device 1 includes a die 10 for forming an outer surface of a metal blank tube 2 , a plug 11 for forming an inner surface of the metal blank tube 2 , a nozzle portion 18 for applying a lubricating oil L, a chucking unit 21 for holding a front end portion of the metal blank tube 2 , a pulling unit 24 for pulling the chucking unit 21 , and a control unit 31 (see FIG. 1 ).
  • the die 10 is equipped with a die main body 13 fitted in a die case 12 , and the die main body 13 includes an approach portion 14 formed on an inner circumferential surface of a central die hole and a bearing portion 15 continued from a front side of the approach portion 14 .
  • the plug 11 is attached to and supported by the front end of a rod 20 made of a hollow tube.
  • the plug 11 has, on its outer peripheral surface, an approach portion 16 and a bearing portion 17 continued from the approach portion 16 toward the front side thereof.
  • the chucking unit 21 includes a pair of chuck fingers 22 and 22 for chucking the front end portion (pointing portion) of the metal blank tube 2 in cooperation with each other, and a chuck finger holder 23 for holding the chuck fingers 22 and 22 .
  • the chucking unit 21 is pulled in the right direction of the figure by the pulling unit 24 , and in this way, the drawing of the metal blank tube 2 is performed. That is, by drawing the metal blank tube 2 in a horizontal direction with the tube 2 inserted between the die 10 and the plug 11 , the outer surface of the tube is formed by the bearing portion 15 of the die main body 13 , and the inner surface of the tube is formed by the bearing portion 17 of the plug 11 . Thus, a drawn tube 3 is produced.
  • the nozzle portion 18 is arranged at a rear upper portion of the die 10 (see FIG. 1 ).
  • a lubricating oil L is ejected from the nozzle portion 18 .
  • the nozzle portion 18 is used for supplying (applying) the lubricating oil L to the surface of the plug 11 and supplying (applying) the lubricating oil L to the outer surface of the metal blank tube 2 .
  • the control unit 31 is configured to: measure an elapsed time T from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped until the metal blank tube 2 is set at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the tube becomes ready to be drawn; control to not perform drawing of the metal blank tube 2 when the measured elapsed time T exceeds a preset allowed time; and control to initiate drawing when the measured elapsed time T is within the preset allowed time (see FIG. 4 ).
  • the preset allowed time T is not especially limited, but can be 120 seconds, for example.
  • the control unit 31 is configured to control to not move the pulling unit 24 when drawing is not performed (stop control) and control to move the pulling unit 24 when drawing is initiated.
  • step is abbreviated as “S” for simplification.
  • the plug 11 is arranged at a lower position of the nozzle portion 18 , and the supplying (application) of the lubricating oil L to the surface of the plug 11 from the nozzle portion 18 is initiated (S 01 ).
  • the supplying (application) of the lubricating oil L to the surface of the plug 11 is stopped (S 02 ), as shown in FIG. 2( b ).
  • a measurement of the elapsed time T is initiated. That is, the measurement of the elapsed time T is initiated from the time at which the supplying of the lubricating oil L to the surface of the plug 11 is stopped.
  • the lubricating oil L adhered to the upper portion of the outer surface of the plug 11 is supplied to the entire circumference of the outer surface of the plug 11 along the outer surface, and the excessive lubricating oil L flows down as time passes.
  • the insertion of the plug to which the lubricating oil L was applied into the metal blank tube 2 is initiated, and as shown in FIG. 3( a ), the plug 11 to which the lubricating oil L was applied is inserted and arranged inside (at a predetermined position) the metal blank tube 2 (S 03 ).
  • these plug 11 and metal blank tube 2 are inserted into the die 10 and set at a drawing position (arranged). That is, the metal blank tube 2 is set at a drawing position between the die 10 and the plug 11 (S 04 ). Simultaneously with setting (arranging) the tube at the drawing position, supplying of the lubricating oil L to the outer surface of the metal blank tube 2 from the nozzle portion 18 is initiated (see FIG. 3( b )).
  • the front end portion (pointing portion) of the metal blank tube 2 is chucked (sandwiched and fastened) by a pair of chuck fingers 22 and 22 (S 05 ).
  • the measurement of the elapsed time T is terminated when the blank tube 2 becomes in a drawable state by completion of sandwiching and fastening the blank tube 2 by the chucking unit 21 .
  • the control unit 31 determines whether or not the elapsed time T (the elapsed time T from a time at which supplying of the lubricating oil to the surface of the plug is stopped until the tube becomes ready to be drawn) is within a preset allowed time (S 06 ).
  • the drawing of the metal blank tube 2 is not initiated (drawing is not performed) and an alarm is sounded (S 10 ).
  • the plug 11 is moved backwards (moved back in a direction separating from the die 10 ) (S 11 ).
  • the metal blank tube 2 set at the drawing position is pulled out (removed) (S 12 ) to prepare for a drawing process for the next new metal blank tube 2 .
  • drawing is initiated (S 07 ). That is, as shown in FIG. 1 , the metal blank tube 2 is subjected to a drawing process by making the tube pass through between the die 10 and the plug 11 to obtain a drawn tube 3 by pulling the front end portion of the blank tube 2 by the chucking unit 21 while applying the lubricating oil L on the outer surface of the metal blank tube 2 from the nozzle portion 18 (S 08 ). Then, the plug 11 is moved backwards (moved back in a direction separating from the die 10 ) (S 09 ) to prepare for a drawing process for the next new metal blank tube 2 .
  • control unit 31 (control method) can be configured as follows. That is, in the first embodiment, the control unit 31 can be configured to have a structure (control method) as follows:
  • the measurement of the elapsed time is initiated from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped;
  • the device 1 it is controlled to stop the operation of the device 1 when the measuring elapsed time T exceeds a preset allowed time during a period of time from the initiation of the measurement until the metal blank tube 2 is set (arranged) at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the tube becomes ready to be drawn, or at the time at which the tube becomes ready to be drawn;
  • the measuring elapsed time T is within the preset allowed time at a time at which the metal blank tube 2 is set (arranged) at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the tube becomes ready to be drawn.
  • FIG. 1 Another embodiment (second embodiment) of a drawing device 1 according to the present invention will be explained.
  • the structure of the drawing device 1 of this second embodiment is as shown in FIG. 1 .
  • the structure of the control unit 31 control method
  • the other structures are the same as those of the first embodiment.
  • control unit 31 is configured to: measure a first elapsed time T 1 from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped until the plug 11 is inserted into the metal blank tube 2 ; control to stop the operation of the drawing device 1 when the measured first elapsed time T 1 exceeds the preset first allowed time; and control to continue the operation of the drawing device 1 when the measured first elapsed time T 1 is within the first allowed time (see FIG. 5 ).
  • control unit 31 is configured to: measure a second elapsed time T 2 from at time at which the plug is inserted into the metal blank tube 2 until the metal blank tube 2 is set at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the tube becomes ready to be drawn; control to not perform drawing of the metal blank tube 2 when the measured second elapsed time T 2 exceeds a preset second allowed time; and control to initiate drawing when the measured second elapsed time T 2 is within the preset second allowed time (see FIG. 5 ).
  • the preset first allowed time T 1 is not especially limited, but can be 30 seconds, for example.
  • the preset second allowed time T 2 is not especially limited, but can be 90 seconds, for example.
  • the plug 11 is arranged at a lower position of the nozzle portion 18 , and supplying (application) of the lubricating oil L to the surface of the plug 11 from the nozzle portion 18 is initiated (S 21 ).
  • the supplying (application) of the lubricating oil L to the surface of the plug 11 is stopped (S 22 ).
  • a measurement of the first elapsed time T 1 is initiated. That is, the measurement of the first elapsed time T 1 is initiated from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped.
  • the lubricating oil L adhered to the upper portion of the outer surface of the plug 11 is supplied to the entire periphery of the outer surface of the plug 11 along the outer surface, and the excessive lubricating oil L flows down as time passes.
  • the control unit 31 determines whether or not the measured first elapsed time T 1 (the first elapsed time T from a time at which supplying of the lubricating oil to the surface of the plug is stopped until the plug is inserted into the metal blank tube 2 ) is within a preset first allowed time (S 24 ).
  • the plug 11 and the metal blank tube 2 are inserted into the die 10 and set (arranged) at the drawing positions. That is, the metal blank tube 2 is set (arranged) at a drawing position between the die 10 and the plug 11 (S 25 ). Simultaneously with the setting (arranging) of the tube at the drawing position, supplying of the lubricating oil L to the outer surface of the metal blank tube 2 from the nozzle portion 18 is initiated (see FIG. 3( b )).
  • the front end portion (pointing portion) of the metal blank tube 2 is chucked (sandwiched and fastened) by a pair of chuck fingers 22 and 22 (S 26 ).
  • the measurement of the second elapsed time T 2 is terminated when the sandwiching and fastening of the blank tube 2 by the chucking unit 21 is completed and the tube becomes in a drawable state (see FIG. 5) .
  • drawing is initiated (S 28 ). That is, as shown in FIG. 1 , a drawing process is performed by making the metal blank tube 2 pass through between the die 10 and the plug 11 by pulling the front end portion of the blank tube 2 by the chucking unit 21 while applying the lubricating oil L on the outer surface of the metal blank tube 2 from the nozzle portion 18 (S 29 ) to obtain a drawn tube 3 and complete the drawing. Thereafter, the plug 11 is moved backwards (moved back in a direction separating from the die 10 ) (S 30 ) to prepare for a drawing process for the next new metal blank tube 2 .
  • the structure of the control unit 31 can be changed into the following structure. That is, in the second embodiment, as for the measurement of the first elapsed time T 1 and the judgment in S 24 , the control unit 31 can be configured to have a structure (control method) as follows: the measurement of the first elapsed time T 1 is initiated from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped; it is controlled to stop the operation of the device 1 when the measuring first elapsed time T 1 exceeds a preset first allowed time during a period of time from the initiation of the measurement until the plug 11 is inserted into the metal blank tube 2 , or at a time at which the plug 11 is inserted; and it is controlled to continue the operation of the device 1 when the measuring first elapsed time T 1 is within a preset first allowed time at a time at which the plug 11 is inserted into the metal blank tube 2 .
  • the control unit 31 can be configured to have a structure (control method) as follows: the measurement of the second elapsed time T 2 is initiated from a time at which the plug 11 is inserted into the metal blank tube 2 ; it is controlled to stop the operation of the device 1 when the measuring second elapsed time T 2 exceeds a preset second allowed time during a period of time from the initiation of the measurement until the metal blank tube 2 is set (arranged) at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the tube becomes ready to be drawn, or at the time at which the pipe becomes ready to be drawn; and it is controlled to initiate drawing when the measuring second elapsed time T 2 is within the preset second allowed time at a time at which the metal blank tube 2 is set (arranged) at a drawing position between the die 10 and the plug 11 , the front end portion
  • FIG. 1 The structure of the drawing device 1 of this third embodiment is as shown in FIG. 1 .
  • the structure of the control unit 31 (control method) is different from the aforementioned first embodiment, the other structures are the same as those of the aforementioned first embodiment.
  • control unit 31 is configured to: measure a first elapsed time T 1 from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped until the plug 11 is inserted into the metal blank tube 2 ; control to stop the operation of the drawing device 1 when the measured first elapsed time T 1 exceeds the preset first allowed time; and control to continue the operation of the drawing device 1 when the measured first elapsed time T 1 is within the first allowed time (see FIG. 6 ).
  • control unit 31 is configured to: measure a second elapsed time T from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped until the metal blank tube 2 is set at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the tube becomes ready to be drawn; control to not perform drawing of the metal blank tube 2 when the measured second elapsed time T exceeds the preset second allowed time; and control to initiate drawing when the measured second elapsed time T is within the preset second allowed time (see FIG. 6 ).
  • the preset first allowed time T 1 is not especially limited, but can be 30 seconds, for example.
  • the preset second allowed time T is not especially limited, but can be 90 seconds, for example.
  • FIG. 6 a flowchart of a drawing method of a metal tube using the drawing device 1 according to the aforementioned third embodiment is shown in FIG. 6 . It is different from the drawing method of a metal tube using the drawing device 1 according to the aforementioned second embodiment (see FIG. 5 ) in that the initiation of the measurement of the second elapsed time T in the control unit 31 is set to “a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped.” The other methods are the same as those of the aforementioned second embodiment.
  • the operation of the device 1 in the judgment in S 24 , when the measured first elapsed time T 1 exceeds the preset first allowed time and a sufficient amount of the lubricating oil carried into the metal blank tube 2 from the plug 11 is not secured, the operation of the device 1 can be stopped; and when the measured first elapsed time T 1 is within the preset first allowed time and a sufficient amount of the lubricating oil carried into the metal blank tube 2 from the plug 11 is secured, the operation of the device 1 can be continued as it is.
  • control unit 31 can be changed into the following structure. That is, in the third embodiment, as for the measurement of the first elapsed time T 1 and the judgment in S 24 , the control unit 31 can be configured to have a structure (control method) as follows:
  • the measurement of the first elapsed time T 1 is initiated from a time at which supplying of the lubricating oil L to the surface of the plug 11 is stopped;
  • the device 1 it is controlled to stop the operation of the device 1 when the measuring first elapsed time T 1 exceeds a preset first allowed time during a period of time from the initiation of the measurement until the plug 11 is inserted into the metal blank tube 2 , or at a time at which the plug 11 is inserted;
  • the device 1 it is controlled to continue the operation of the device 1 when the measuring first elapsed time T 1 is within a preset first allowed time at a time at which the plug 11 is inserted into the metal blank tube 2 .
  • control unit 31 can be configured to have a structure (control method) as follows:
  • the measurement of the second elapsed time T is initiated from a time at which supplying of lubricating oil L to a surface of the plug 11 is stopped;
  • the device 1 it is controlled to stop the operation of the device 1 when the measuring second elapsed time T exceeds a preset second allowed time during a period of time from the initiation of the measurement until the metal blank tube 2 is set (arranged) at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the tube becomes ready to be drawn, or at the time at which the pipe becomes ready to be drawn;
  • the measuring second elapsed time T is within the preset second allowed time at a time at which the metal blank tube 2 is set (arranged) at a drawing position between the die 10 and the plug 11 , the front end portion of the metal blank tube 2 is held by the chucking unit 21 and the pipe becomes ready to be drawn.
  • the initiation point of the measurement of the elapsed time T is set to the time at which “supplying of the lubricating oil to the surface of the plug is stopped” (see FIG. 4 )
  • the initiation point of the measurement of the first elapsed time T 1 is set to the time at which “supplying of the lubricating oil to the surface of the plug is stopped” (see FIG. 5 )
  • the initiation point of the measurement of the first elapsed time T 1 and the second elapsed time T are set to the time at which “supplying of the lubricating oil to the surface of the plug is stopped” (see FIG. 6 ).
  • the initiation points of these measurements can be set to “initiation of supplying of the lubricating oil to the surface of the plug” (they are essentially the same).
  • alarms are sounded to notify an operator when the judgment result in S 06 , S 24 , and S 27 is NO, but not especially limited to that.
  • a revolving light red, etc
  • the length of the metal blank tube 2 which is an object to be drawn is not limited. Since shortage of lubricating oil more likely occurs for longer metal blank tubes, the present invention is preferably applied to drawing of a longer blank tube. Specifically, significant effects can be obtained for a blank tube 2 m or longer, especially 2.5 m or longer.
  • the material of the metal blank tube 2 which is an object to be drawn is not especially limited, but can be, for example, aluminum, iron, copper, or alloys thereof. Since significant effects can be obtained when drawing a longer blank tube, the present invention is suited for a production of an aluminum tube for a photosensitive drum substrate.
  • a metal blank tube 2 was drawn using the drawing device 1 according to the first embodiment having the structure shown in FIG. 1 (see the flowchart of FIG. 4 ).
  • a billet made of an aluminum alloy (Mn: 1.12 mass %, Si: 0.11 mass %, Fe: 0.39 mass %, Cu: 0.16 mass %, Zn: 0.01 mass %, Mg: 0.02 mass %, and the balance being aluminum and inevitable impurities) was extruded under the condition of an extrusion temperature of 520° C. and an extrusion rate of 5 m/min to obtain a cylindrical tube having an outer diameter of 32 mm and a thickness of 1.5 mm, and cut into 2.2 m in length, which was used as a metal blank tube 2 .
  • the approach angle of the approach portion 14 of the die 10 was 15°
  • the bearing length of the bearing portion 15 of the die 10 was 15 mm
  • the approach angle of the approach portion 16 of the plug 11 was 7°
  • the bearing length of the bearing portion 17 of the plug 11 was 2 mm.
  • the application of the lubricating oil L to the outer surface of the metal blank tube 2 from the nozzle portion 18 was initiated.
  • the front end portion (pointing portion) of the metal blank tube 2 was chucked by a pair of chuck fingers 22 and 22 (which became in a drawable state) (S 05 ).
  • the measurement of the elapsed time T was terminated when the sandwiching and fastening of the blank tube 2 by the chucking unit 21 was completed and the tube became in a drawable state.
  • the metal blank tube 2 was drawn by making the tube pass through between the die 10 and the plug 11 by pulling the front end portion of the blank tube 2 by the chucking unit 21 while applying the lubricating oil L onto the outer surface of the metal blank tube 2 from the nozzle portion 18 to obtain a drawn tube 3 , and the drawing was completed (S 08 ).
  • a drawn tube 3 was obtained by performing the drawing at a drawing rate of 30 m/min, an outer diameter reduction rate of 16%, and a cross-sectional area reduction rate of 32%.
  • the lubricating oil L a lubricating oil named “Stroll ES150” produced by Kyoueiyuka Co. was used.
  • Example 2 After performing to S 06 in the same manner as in Example 1, it was judged in S 06 .
  • the elapsed time T was 120 seconds, which was within the allowed time (200 seconds), so the judgment result was YES and therefore, drawing was initiated as it is (S 07 ). That is, a drawn tube 3 was obtained by performing the drawing in the same manner as in Example 1.
  • Example 3 After performing to S 06 in the same manner as in Example 1, it was judged in S 06 .
  • the elapsed time T was 180 seconds, which was within the allowed time (200 seconds), so the judgment result was YES and therefore, drawing was initiated as it is (S 07 ). That is, a drawn tube 3 was obtained by performing the drawing in the same manner as in Example 1.
  • Example 4 After performing to S 06 in the same manner as in Example 1, it was judged in S 06 .
  • the elapsed time T was 240 seconds, which exceeded the allowed time (200 seconds), so the judgment result was NO and therefore, drawing was not initiated (S 10 ).
  • the metal blank tube 2 set at the drawing position was pulled out (S 12 ) to prepare for the drawing of the next new metal blank tube 2 .
  • Example 5 After performing to S 06 in the same manner as in Example 1, it was judged in S 06 .
  • the elapsed time T was 300 seconds, which exceeded the allowed time (200 seconds), so the judgment result was NO and therefore, drawing was not initiated (drawing was not performed) (S 10 ).
  • the metal blank tube 2 set at the drawing position was pulled out (S 12 ) to prepare for the drawing process of the next new metal blank tube 2 .
  • Example 4 After performing to S 06 in the same manner as in Example 1, it was judged in S 06 .
  • the elapsed time T was 240 seconds, which exceeded the allowed time (200 seconds), so the judgment result was NO. But, ignoring the judgment, drawing was performed in the same manner as in Example 1 to obtain a drawn tube 3 .
  • Example 4 After performing to S 06 in the same manner as in Example 1, it was judged in S 06 .
  • the elapsed time T was 300 seconds, which exceeded the allowed time (200 seconds), so the judgment result was NO. But, ignoring the judgment, drawing was performed in the same manner as in Example 1 to obtain a drawn tube 3 .
  • the device and method for drawing a metal tube according to the present invention are suited for a production of aluminum tubes for use in a photosensitive drum substrate since it is possible to make a sufficient amount of lubricating oil adhere to an inner surface of a metal blank tube in a continuous drawing of a plurality of blank tubes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Metal Extraction Processes (AREA)
US14/241,163 2011-08-30 2012-08-28 Device and method for drawing metal tube Abandoned US20150174631A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011186790A JP5781399B2 (ja) 2011-08-30 2011-08-30 金属管の引抜装置及び引抜方法
JP2011-186790 2011-08-30
PCT/JP2012/071673 WO2013031760A1 (ja) 2011-08-30 2012-08-28 金属管の引抜装置及び引抜方法

Publications (1)

Publication Number Publication Date
US20150174631A1 true US20150174631A1 (en) 2015-06-25

Family

ID=47756245

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/241,163 Abandoned US20150174631A1 (en) 2011-08-30 2012-08-28 Device and method for drawing metal tube

Country Status (4)

Country Link
US (1) US20150174631A1 (zh)
JP (1) JP5781399B2 (zh)
CN (1) CN103764307B (zh)
WO (1) WO2013031760A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108580571A (zh) * 2018-04-27 2018-09-28 海亮（安徽）铜业有限公司 一种紫铜管的拉伸卸油式模盒
US20190193131A1 (en) * 2016-06-24 2019-06-27 Sandvik Materials Technology Deutschland Gmbh A Method For Forming A Hollow Of A Ferritic FeCrAl Alloy Into A Tube

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6316151B2 (ja) * 2014-09-12 2018-04-25 本田技研工業株式会社 鋳造加工方法及びその装置と、それによって得られる鋳造品
KR101975152B1 (ko) * 2018-11-28 2019-08-23 왕태식 모세관 인발 성형장치
CN110918663B (zh) * 2019-12-07 2021-02-02 西安诺博尔稀贵金属材料股份有限公司 利用内表面加工装置对纯银管材内表面进行加工的方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850016A (en) * 1973-07-30 1974-11-26 Etna Prod Inc Method and apparatus for controlled lubrication during metal drawing
SU546405A1 (ru) * 1975-06-09 1977-02-15 Уральский ордена Трудового Красного Знамени политехнический институт им. С.М.Кирова Оправка дл волочени труб
DD259579A1 (de) * 1987-04-13 1988-08-31 Waelzlager Normteile Veb Verfahren zum regelbaren aufbringen von festschmierstoffen auf umformgut
JPH08215713A (ja) * 1995-02-14 1996-08-27 Nippon Steel Corp 継目無鋼管の圧延方法及び圧延設備
CN2897483Y (zh) * 2006-04-11 2007-05-09 济南重工股份有限公司 一种芯棒润滑装置
JP5154861B2 (ja) * 2007-08-22 2013-02-27 昭和電工株式会社 金属管の引抜装置および引抜方法
JP5151954B2 (ja) * 2008-12-12 2013-02-27 新日鐵住金株式会社 冷間引抜き用潤滑油ろ過装置およびこれを用いる直接油潤滑抽伸装置
CN201346556Y (zh) * 2009-01-06 2009-11-18 天津钢管集团股份有限公司 芯棒石墨喷涂恒压控制系统
JP5280971B2 (ja) * 2009-08-18 2013-09-04 昭和電工株式会社 金属管の引抜装置および引抜方法
CN102000709A (zh) * 2010-10-27 2011-04-06 常州市腾田液压机械有限公司 一种冷拔钢管的液压油冷的方法及实现冷拔钢管的液压油冷方法的冷拔钢管成型机
CN201889319U (zh) * 2010-11-24 2011-07-06 浙江海亮股份有限公司 管材连续拉拔内腔润滑剂补充装置
JP5749605B2 (ja) * 2011-08-26 2015-07-15 昭和電工株式会社 金属管の引抜方法及び引抜装置
JP5819146B2 (ja) * 2011-09-15 2015-11-18 昭和電工株式会社 金属管の引抜方法及び引抜装置
JP5819145B2 (ja) * 2011-09-15 2015-11-18 昭和電工株式会社 金属管の引抜方法及び引抜装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190193131A1 (en) * 2016-06-24 2019-06-27 Sandvik Materials Technology Deutschland Gmbh A Method For Forming A Hollow Of A Ferritic FeCrAl Alloy Into A Tube
US10882090B2 (en) * 2016-06-24 2021-01-05 Sandvik Materials Technology Deutschland Gmbh Method for forming a hollow of a ferritic FeCrAl alloy into a tube
CN108580571A (zh) * 2018-04-27 2018-09-28 海亮（安徽）铜业有限公司 一种紫铜管的拉伸卸油式模盒

Also Published As

Publication number Publication date
JP5781399B2 (ja) 2015-09-24
CN103764307A (zh) 2014-04-30
JP2013049062A (ja) 2013-03-14
WO2013031760A1 (ja) 2013-03-07
CN103764307B (zh) 2015-11-25

Similar Documents

Publication Publication Date Title
US20150174631A1 (en) Device and method for drawing metal tube
US9885995B2 (en) Aluminum alloy and process for producing aluminum alloy extrusions
JP5280971B2 (ja) 金属管の引抜装置および引抜方法
JP5426701B2 (ja) 金属管の引抜装置および引抜方法
JP5230215B2 (ja) 感光ドラム基体用アルミニウム管の製造方法
US8327676B2 (en) Upper-end formed glass complex for hot expanding piercing and method of manufacturing billet for hot extrusion pipe making
JP5154851B2 (ja) 金属管の引抜装置および引抜方法
JP5149545B2 (ja) アルミニウム管の製造方法
US20070039369A1 (en) Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosensitive drum base body
JP5819146B2 (ja) 金属管の引抜方法及び引抜装置
JP5819145B2 (ja) 金属管の引抜方法及び引抜装置
US20130192326A1 (en) Method for drawing metallic tube
JP2012166205A (ja) 金属管の引抜方法及び引抜装置
CN107188394B (zh) 玻璃出料管拉拔模组、玻璃出料管制造方法及玻璃出料管
JP2011137233A (ja) アルミニウム合金棒の製造方法
JP5749605B2 (ja) 金属管の引抜方法及び引抜装置
JP2007275996A (ja) マンドレル緊急引抜装置およびマンドレル緊急引抜方法、並びにこれらを用いるマンドレルミル
KR101680554B1 (ko) 알루미늄 튜브 인발시 윤활유 공급 구조를 갖는 코어
JP5661495B2 (ja) 金属管の引抜方法及び引抜装置
JP2010131619A (ja) 押出材の製造方法
KR100716614B1 (ko) 히트 롤러의 제조방법 및 그의 제조물
RU2638468C1 (ru) Способ винтовой прошивки заготовки
JP5080802B2 (ja) 引抜加工方法
JP2005131667A (ja) 熱間押出継目無鋼管の製造方法
CN103071697A (zh) 一种空心管材的内剥皮芯头及其拉伸装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: SHOWA DENKO K.K., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SAKIHAMA, HIDEKAZU;HISATA, NOBOHIKO;OINUMA, KEIICHI;AND OTHERS;SIGNING DATES FROM 20140523 TO 20140530;REEL/FRAME:033124/0429

AS Assignment

Owner name: SHOWA DENKO K.K., JAPAN

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE SECOND ASSIGNOR'S NAME SHOULD APPEAR AS HISATA, NOBUHIKO PREVIOUSLY RECORDED ON REEL 033124 FRAME 0429. ASSIGNOR(S) HEREBY CONFIRMS THE ENTIRE INTEREST;ASSIGNORS:SAKIHAMA, HIDEKAZU;HISATA, NOBUHIKO;OINUMA, KEIICHI;AND OTHERS;SIGNING DATES FROM 20140523 TO 20140530;REEL/FRAME:033245/0093

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION