WO2011115166A1 - Procédé d'étirage de tube métallique - Google Patents

Procédé d'étirage de tube métallique Download PDF

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Publication number
WO2011115166A1
WO2011115166A1 PCT/JP2011/056197 JP2011056197W WO2011115166A1 WO 2011115166 A1 WO2011115166 A1 WO 2011115166A1 JP 2011056197 W JP2011056197 W JP 2011056197W WO 2011115166 A1 WO2011115166 A1 WO 2011115166A1
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WO
WIPO (PCT)
Prior art keywords
lubricant
tube
amount
discharge port
discharge
Prior art date
Application number
PCT/JP2011/056197
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English (en)
Japanese (ja)
Inventor
山本　学
路哉 砂塚
Original Assignee
昭和電工株式会社
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 昭和電工株式会社 filed Critical 昭和電工株式会社
Priority to CN201180014732.0A priority Critical patent/CN102802826B/zh
Priority to US13/635,489 priority patent/US20130192326A1/en
Publication of WO2011115166A1 publication Critical patent/WO2011115166A1/fr

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    • 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
    • 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
    • B21C9/00—Cooling, heating or lubricating drawing material
    • B21C9/005—Cold application of the lubricant

Definitions

  • the present invention relates to a metal drawing tube, for example, a metal tube drawing method that can be suitably used as a substrate for an OPC photosensitive drum in an electrophotographic apparatus such as a copying machine, a laser beam printer, and a facsimile, and that can produce a drawing tube with excellent dimensional accuracy.
  • a drawing apparatus for carrying out this drawing method.
  • “rear” in the drawing method and drawing apparatus represents the direction on the raw tube side with respect to the drawn tube
  • “front” represents the direction on the drawn tube side with respect to the drawn tube.
  • “upper side” represents the direction side opposite to the gravity direction
  • “lower side” represents the direction side in the gravity direction.
  • non-cutting tubes suitable for mass production have been frequently used as substrates for OPC photosensitive drums in electrophotographic apparatuses such as copying machines, laser beam printers, and facsimiles.
  • One of the uncut pipes is an ED pipe made by drawing an extruded aluminum pipe, which is suitable for mass production in that multiple product pipes can be produced by one drawing, and responds to mass consumption as the market expands. It is attracting attention as a manufacturing method.
  • This ED pipe is obtained by first extruding an aluminum billet to obtain an aluminum extruded element pipe, cutting the extruded element pipe into a predetermined length, and performing a drawing process of one pass or two passes or more with a die and a plug, It is manufactured by obtaining an aluminum tube defined in a predetermined shape (outer diameter, inner diameter, wall thickness), cutting, chamfering the end, washing, and inspecting dimensions and appearance.
  • the present applicant provides an opening in the peripheral wall of the hollow rod that supports the plug, and discharges the lubricant supplied from the rear end of the rod through the opening, A drawing device that can supply lubricant to the inner surface at any time was proposed.
  • a core is attached to the rod in order to evenly spread the lubricant adhered to the inner surface of the plug tube (Patent Documents 1 and 2).
  • the amount of lubricant used is increased in order to prevent oil shortage.
  • the amount of lubricant taken out to the drawing tube increases and the burden of cleaning in the subsequent process increases.
  • the present invention provides a drawing method in which a lubricant is supplied from the discharge port of a rod to the inner surface of the pipe, and without using a coating member such as a core, the circumferential direction of the pipe. It is an object of the present invention to adhere the lubricant without excess or deficiency even in the length direction.
  • the surface where the metal tube and the plug are in contact with each other needs to be filled with a necessary amount of lubricant.
  • the problem of the lubricant supply mechanism installation gap, (2) the metal base tube and the plug contact each other.
  • the problem is that the thickness of the lubricant is uneven on the surface, and (3) the problem that seizure may occur if the lubricant is insufficient, so the amount of lubricant adhering must be an excessive amount on the safe side against seizure. There is.
  • the thickness of the lubricant is not uniform on the surface where the metal tube and the plug are in contact. If the supply accuracy of the lubricant supply mechanism for the lubricant is not high, the metal tube and the plug will contact each other. The thickness of the lubricant becomes nonuniform in the circumferential direction of the surface to be applied. A lubricant supply mechanism with high supply accuracy has a complicated structure and is expensive.
  • the upper region is higher than the center position in the vertical direction of the raw pipe on the inner face of the raw pipe from the discharge port provided in the rod in the drawing direction front side from the surface where the metal base pipe and the plug contact.
  • the excess lubricant sprayed onto the portion including the highest position on the inner surface of the raw tube is allowed to flow down by its own weight.
  • the lubricant remaining on the inner surface of the raw tube after the excess portion has flowed down due to its own weight can provide the thickness uniformity required for drawing. Since it takes time for the excess part to flow down due to its own weight, a protrusion is provided on the rod away from the surface where the metal pipe and the plug contact, not near the surface where the metal pipe and the plug contact. It was.
  • the protrusion is provided at a position 10 mm or more away from the surface where the metal tube and the plug are in contact.
  • a region where the lubricant is not attached is intentionally provided on the inner surface of the raw tube before reaching the plug, and the extra lubricant is added to the region where the lubricant is not attached.
  • the present invention has the configurations described in [1] to [7] below.
  • a discharge port for discharging the lubricant is opened on the outer peripheral surface of the hollow rod supporting the plug, and the discharge port is provided only in a region above the center in the vertical direction of the rod,
  • a metal tube drawing apparatus comprising: a discharge control device that intermittently discharges and stops the lubricant during drawing of the raw tube.
  • the lubricant is discharged from the discharge port of the rod toward the upper region of the inner surface of the raw tube, and the lubricant is sprayed on a portion including the highest position of the inner surface of the raw tube.
  • the lubricant is attached by the lubricant flowing down from the spraying position below, an excessive amount of lubricant accumulated in the lower region of the raw tube can be reduced.
  • the excess supply amount of the lubricant is reduced as much as possible while giving the discharge flow momentum for reaching the inner surface of the raw tube. Therefore, it is possible to adhere a lubricant that satisfies the required amount both in the circumferential direction and in the length direction of the raw tube, and to reduce the excess lubricant as much as possible.
  • a shortage of lubricant in the upper region due to heat of drawing can be avoided by gradually increasing the amount of lubricant sprayed. That is, the temperature of the lubricant increases due to the heat of drawing, and the viscosity decreases as the temperature of the lubricant increases. As the viscosity of the lubricant decreases, the amount of lubricant that flows down increases and the amount of lubricant adhering to the upper region decreases, but by gradually increasing the amount of lubricant sprayed, the lack of lubricant in the upper region can be avoided. .
  • the rod can be used as a lubricant supply path, the lubricant supply mechanism can be simplified.
  • the lubricant can be sprayed forward from the position of the discharge port, and the distance from the spray position to the bearing portion of the plug is shortened, so that the lubricant is insufficient in the bearing portion.
  • the lubricant can be reliably attached to the portion that is easy to do.
  • the nozzle protrudes from the outer peripheral surface of the rod, the discharge position of the lubricant approaches the element pipe, and therefore the case where the inner diameter of the element pipe is larger than the rod diameter or the discharge amount Even when there is little, it can be made to adhere to the expected position reliably. Furthermore, since the nozzle serves as a weir when oil supply is stopped, it is possible to prevent outflow from a discharge port provided at a position other than the apex.
  • the drawing methods [1] to [6] can be implemented. Since the lubricant outlet is provided only in the upper region of the rod, even if the lubricant supply is stopped, the lubricant filled in the rod does not flow out of the outlet or a slight amount even if it flows out. Even when the supply of the lubricant is stopped, the inside of the rod is filled with the lubricant or almost filled. For this reason, even if the supply of lubricant is stopped after the drawing of one tube is completed and the tube is taken out from the device and the next tube is set in the device, the inside of the rod is covered with lubricant.
  • the lubricant When the supply of the lubricant is resumed, the lubricant can be discharged from the discharge port immediately or in a very short time because the supply is satisfied or almost satisfied. Therefore, in continuous drawing of multiple pipes, if intermittent lubricant supply is performed to stop the supply of lubricant when replacing the pipes, the lubricant is securely attached from the beginning of each pipe drawing. Seizure can be prevented. Moreover, since it is not necessary to wait for the recovery of the discharge amount after resuming the supply of the lubricant, it can be processed efficiently.
  • FIG. 2 is a cross-sectional view of a raw tube and a rod in the drawing device of FIG. 1. It is a cross-sectional view which shows the other aspect of a rod. It is a cross-sectional view which shows the other aspect of a rod. It is a cross-sectional view which shows the other aspect of a rod. It is a longitudinal cross-sectional view which shows the other aspect of a rod. It is a longitudinal cross-sectional view which shows the other aspect of a rod. It is a longitudinal cross-sectional view which shows the other aspect of a rod. It is a graph which shows the change of the discharge amount of a lubricant in the drawing method of the present invention, and the amount of adhesion of the inner surface of an element pipe.
  • FIG. 1 is an example of a drawing apparatus for carrying out the method for drawing a metal tube of the present invention.
  • the drawing device (1) includes a drawing tool and a lubricant supply unit that supplies a lubricant to the outer surface and the inner surface of the raw pipe (2).
  • the drawing tool consists of a drawing die (10) and a plug (11).
  • the drawing die (10) includes a die body (13) fitted in a die case (12), and the die body (13) follows an approach portion (14) around a central die hole. And a bearing portion (15).
  • the plug (11) is attached to and supported by the tip of a rod (20) made of a hollow tube, and has an approach portion (16) and a bearing portion (17) subsequent thereto. Then, by pulling the blank tube (2) through the drawing die (10) and the plug (11), the outer surface of the tube is pulled by the approach portion (14) and the bearing portion (15) of the die body (13). At the same time, the inner surface is formed by the approach portion (16) and the bearing portion (17) of the plug (11), and the drawn tube (3) is manufactured.
  • a nozzle (18) is disposed above the drawing die (10) as an outer surface lubricant supply section.
  • Lubricant (L) supplied from a tank (not shown) is discharged from the nozzle (18) toward the raw pipe (2), and the lubricant (L) adhering to the upper part of the raw pipe (2) travels all along the outer surface.
  • the excess lubricant (L) flows down around the circumference. Then, the raw pipe (2) is introduced into the drawing tool with the lubricant (L) attached to the outer surface.
  • the rod (20) As the inner surface lubricant supply section, the rod (20) is provided with a lubricant discharge port (21).
  • the rod (20) is a hollow tube and is used as a supply path for the lubricant (L), and a discharge port (21) communicating with the supply path is formed by piercing the peripheral wall.
  • the discharge port (21) on the outer peripheral surface of the hollow rod (20), the rod (20) can be used as a lubricant supply path, and the lubricant supply mechanism can be simplified.
  • one discharge port (21) is formed at the apex (the highest position in the vertical direction) of the rod (20) so as to open upward.
  • the lubricant (L) introduced into the inside from the rear part of the rod (20) from the tank (not shown) is discharged from the discharge port (21) and sprayed and adhered to the upper part of the inner surface of the element pipe (2). It spreads in the circumferential direction along the wall. If the lubricant (L) is pulled out while supplying the lubricant (L) to the inner surface of the blank tube (2) in this way, the blank tube (2) is introduced into the pulling tool with the lubricant (L) attached to the entire inner surface. Part of the lubricant (L) adhering to the base pipe (2) is taken out together with the extraction pipe (3), and the rest remains in the base pipe (2) and is sent backward. Switching between discharge and stop of the lubricant (L) and adjustment of the discharge amount are controlled by a discharge control device (45).
  • the lubricant (L) is discharged when the lubricant (L) discharged from the discharge port (21) of the rod (20) is drawn while spraying the inner surface of the base tube (2).
  • the direction, spray position, and spray amount are defined as follows.
  • the lubricant (L) is discharged from the discharge port (21) toward the upper region (40) of the inner surface of the raw pipe (2), and is adhered to the portion including the highest position (P 1 ).
  • the upper region (40) is a region above the center in the vertical direction of the raw tube (2).
  • (H) shows a horizontal plane passing through the center of the raw pipe (2).
  • the region above the horizontal plane (H) is the upper region (40) of the inner surface of the raw tube (2) in the present invention, and the region below the upper region (40) including the horizontal surface is the lower region (41). It is.
  • (P 2 ) is the lowest position on the inner surface of the raw tube (2).
  • the adhered lubricant (L) flows down along the wall surface, and naturally the lubricant (L L) is supplied, and finally the lubricant (L) accumulates in the portion including the lowest position (P 2 ). Therefore, if the lubricant (L) is sprayed on the portion including the highest position (P 1 ) of the upper region (40), it is also supplied to the unsprayed portion of the upper region (40) and the lower region (41). Then, the lubricant (L) is supplied to the entire circumference.
  • the present invention includes a case where a part of the lubricant (L) discharged toward the upper region (40) adheres to the lower region (41) due to diffusion of the discharge flow.
  • a preferable spraying position (40a) is It can be expressed as a region within an angle ( ⁇ ) on both sides in the circumferential direction from (P 1 ) (see FIG. 2).
  • the discharge direction and spray position of the lubricant (L) can be set by the position of the discharge port.
  • the spraying range of the lubricant (L) varies depending on the position of the discharge port, the diffusion angle of the discharge flow, the inner diameter of the raw tube (2), the distance between the discharge port and the inner surface of the raw tube (2), etc. These are set as appropriate so as to spray the desired position.
  • the position of the discharge port is not limited as long as the lubricant (L) can be sprayed onto the upper region (40) including the highest position (P 1 ). This is because the discharged lubricant (L) is sprayed on the inner surface of the raw pipe (2) with a spread, so that it can be sprayed to the highest position (P 1 ) even if discharged from a position lower than the top of the rod. .
  • the number of discharge ports is not limited in any way, and it is optional to spray the lubricant (L) from a plurality of discharge ports. When discharging from a plurality of discharge ports, the lubricant (L) discharged from at least one discharge port may be sprayed onto a portion including the highest position (P 1 ).
  • the rod (22) in FIG. 3 is an example in which two discharge ports (23) and (23) are provided at a position satisfying 0 ° ⁇ ⁇ 90 °. It can be sprayed to the highest position (P 1 ). Also, when pulling out multiple pipes sequentially, the supply of lubricant is stopped to set the pipes, but in order to reduce the amount of lubricant flowing out from the discharge port (23) when the supply of lubricant is stopped Is preferably provided in the range where the angle ( ⁇ ) is 60 ° or less, particularly in the range of 40 ° or less.
  • a nozzle (26) protruding from the outer peripheral surface of the rod (25) at the periphery of the discharge port (21) having a peripheral wall.
  • the discharge position of the lubricant (L) approaches the base pipe (2), so even if the base pipe (2) inner diameter is larger than the rod (25) diameter or the discharge amount is small It can be surely sprayed to the expected position.
  • the supply and stop of the lubricant are repeated in order to discharge the lubricant intermittently while the single pipe is being drawn, but the supply and stop are switched in a short cycle. During this stop, the lubricant does not flow out from the discharge port.
  • the lubricant supply stop for intermittent discharge of the lubricant during drawing is different from the above-described lubricant supply stop at the time of setting the raw pipe.
  • the discharge port is preferably provided at a position close to the bearing portion of the plug in the drawing direction.
  • the lubricant sprayed on the inner surface of the raw pipe flows downward while the raw pipe (2) moves from the position of the discharge port (21) to the position of the bearing (17) of the plug (11). Insufficient lubricant is likely to occur at the highest position (P 1 ) and its vicinity.
  • the position of the discharge port (21) is brought close to the bearing portion (17), and the distance from the spray position of the lubricant (L) to the bearing portion (17) is shortened.
  • the lubricant (L) can be reliably adhered to the upper region where the lubricant (L) is likely to be insufficient in the bearing portion (17), and the lubricant (L) can be efficiently applied to the inner surface of the base tube (2).
  • the discharge port (21) is preferably provided at a position of 20 cm or less from the bearing portion (17), and particularly preferably provided at a position of 10 cm or less.
  • the present invention also includes a case where a discharge port is provided in the overlapping portion. .
  • the lubricant (L) is discharged forward from the discharge port.
  • the spraying position can be brought close to the bearing portion (17), but from the installation position of the discharge port (21)
  • the spray position can be made closer to the bearing portion.
  • FIGS. 6 and 7 As a means for setting the discharge direction of the lubricant (L) in the length direction of the raw tube (2), the structures shown in FIGS. 6 and 7 can be exemplified.
  • the rod (27) in FIG. 6 is obtained by perforating a peripheral wall obliquely and opening the discharge port (28) toward the front.
  • the rod (29) in FIG. 7 is a nozzle (30) attached to a discharge port (28) having a peripheral wall facing forward.
  • the amount of oil that flows down until the lubricant (L) adhered at the spraying position reaches the plug (11) increases toward the rear, so a certain amount of lubrication in the length direction of the base pipe (2)
  • the agent (L) is sprayed, the amount of adhesion when reaching the plug (11) gradually decreases in the upper region (40) and gradually increases in the lower region (41).
  • the discharge amount so that the spray amount of the lubricant (L) gradually increases, the necessary amount of lubricant in the upper region (40) behind the base tube (2).
  • (L) is secured to avoid a shortage of lubricant, and the amount of lubricant excessively accumulated in the lower region (41) is reduced as much as possible.
  • the discharge amount gradually increases means that in the intermittent discharge in the process of pulling out one blank tube, the n-th discharge amount is larger than the (n ⁇ 1) -th discharge amount.
  • the change in the discharge amount may be performed by increasing or decreasing the discharge amount per unit time or by increasing or decreasing the discharge time.
  • the lubricant (L) is intermittently discharged and sprayed intermittently. “Discontinuously discharging” means that discharging and stopping are repeated alternately.
  • the discharge flow In order for the lubricant (L) discharged upward to reach the inner surface of the raw pipe (2), the discharge flow must be vigorous. In order to give momentum to the discharge flow, it is necessary to set the discharge amount per unit time to a certain level or more. If continuous discharge is performed with that discharge amount, the spray amount becomes excessive and the amount taken out to the drawing tube (3) And the residual amount in the raw tube (2) increases.
  • the lubricant (L) in order to reduce the excess supply as much as possible while ensuring the momentum of the discharge flow of the lubricant (L), the lubricant (L) is intermittently discharged, and the raw tube (2 ) Intermittent spraying on the inner surface.
  • lubrication is performed so that the amount sprayed onto the inner surface of the raw tube (2) gradually increases.
  • the agent (L) is discharged intermittently.
  • the die body (13) of the drawing die (10) has an approach angle (15) of the approach portion (14), and a bearing length of the bearing portion (15) is 15 mm.
  • the approach angle of the approach part (16) of the plug (11) is 7 °
  • the bearing length of the bearing part (17) is 2 mm.
  • the discharge port (21) is provided 10 cm behind the bearing portion (17) of the plug (11).
  • Strol ES150 viscosity: 1.4 ⁇ 10 ⁇ 4 m 2 / s
  • Kyoei Oil Co., Ltd. was used as the outer surface and inner surface lubricant (L).
  • the middle stage of FIG. 8 shows the change in the amount of lubricant (L) attached at the highest position (P 1 ) of the upper area (40), and the lower stage at the lowest position (P 2 ) of the lower area (41).
  • the change of the adhesion amount of a lubricant (L) is shown.
  • a thick solid line indicates an example of the invention, and a thin solid line indicates a comparative example.
  • the broken line represents the necessary amount of the lubricant (L), and below this amount indicates that the lubricant is insufficient.
  • the ejections of the present invention example and the comparative example are illustrated with a shift of 1 ⁇ 2 cycle. This is shifted for easy understanding of the difference between the two, and does not accurately indicate the discharge timing from the start of drawing.
  • the amount of adhesion is maximized immediately after the spraying at the highest position (P 1 ) of the upper region (40). It gradually decreases due to take-out and flow-down by the drawing pipe (3), and this increase and decrease is repeated by intermittent discharge.
  • the flow-off amount gradually increases due to the processing heat
  • the discharge amount per one time since the discharge amount per one time is gradually increased, the minimum value of the adhesion amount does not fall below the required amount.
  • the discharge amount per one time is constant, when the flow amount gradually increases, the adhesion amount is less than the required amount in the rear portion.
  • the lubricant (L) is supplied by the flow-down from the top, so the timing is shifted from the spraying, and the amount of adhesion becomes maximum and minimum.
  • the lowest position (P 2 ) it is accumulated except for the amount taken out by the drawing tube (3), and the amount of adhesion increases as it goes backward while repeating increase and decrease. Absent. Such an increase / decrease pattern is common to the present invention example and the comparative example.
  • the lubricant (L) adheres except for the spraying position, the amount of adhesion at the highest position (P 1 ) shown in the figure satisfies the required amount and the lowest position (P 2 ) satisfies the required amount. If the agent (L) is accumulated, the lubricant (L) satisfying the necessary amount is also adhered to the portion in between. Therefore, in the example of the present invention, the lubricant (L) satisfying the necessary amount is also attached to the portion between the highest position (P 1 ) and the lowest position (P 2 ) not shown in the graph of FIG. Thus, the lubricant (L) that satisfies the required amount can be attached to the entire circumferential direction.
  • the amount of the lubricant sprayed and the amount of increase are appropriately set according to the viscosity of the lubricant, the length and diameter of the raw tube, the processing heat generated during drawing, and the like.
  • the method of gradually increasing the spray amount is not limited to increasing the discharge amount per time as in the above example.
  • the discharge time can be gradually increased by increasing the discharge time for one time or shortening the discharge interval. A plurality of these can also be combined. These discharge conditions are set in the discharge control device (45).
  • the lubricant (L) cannot be sprayed between the plug (11) and the discharge port (21) at the front part of the raw pipe (2). . Moreover, even if it is behind the discharge port (21), the lubricant (L) is not applied to a portion below the spray position until it flows down from the spray position. In order to run out of the lubricant at the beginning of the drawing of the raw tube, the lubricant (L) is applied in advance to the front portion of the raw tube (2), or the lubricant ( It may be dealt with by applying L).
  • the inside of the rod (20) is filled with the lubricant (L).
  • the lubricant (L) inside the rod (20) is moved outside to the height of the discharge port (21) during the tube replacement in the step (iii). leak.
  • the rod (20) of FIGS. 1 and 2 has the discharge port (21) at the apex, so that the lubricant (L) does not flow out, but the discharge port (23) of the rod (22) of FIG. Since it is provided at a position lower than the apex, it flows out to the height of the discharge port (23).
  • Step (v) is a standby period for replenishing the outflow and waiting for the recovery of the discharge amount. The smaller the outflow amount, the shorter the standby time and the better the lubricant discharge response. If the next tube (2) is pulled out without waiting for the step (v), the lubricant becomes insufficient at the beginning of the drawing.
  • the discharge port is provided only in the region above the center in the vertical direction of the rod, the amount of outflow at the time of stopping the supply of the lubricant is small, and the lubricant is surely applied to the inner surface of the raw tube from the beginning of drawing. , And the waiting time can be shortened as much as possible to shorten the time required for a plurality of continuous drawing processes.
  • the present invention is not limited to the oil-based lubricant.
  • the present invention can achieve the above effects even when an aqueous lubricant is used.
  • the metal tube drawing method of the present invention is not limited to the type of metal, and can be widely applied to aluminum, iron, copper, alloys thereof, and the like. Since a remarkable effect is obtained when a long elementary tube is drawn, it is suitable for manufacturing an aluminum tube for a photosensitive drum substrate. In the production of aluminum tubes for photosensitive drum bases, there is a tendency to use long blanks to produce a large number of product tubes in a single drawing process. By applying the drawing method of the present invention, high quality with little flare is obtained. Can be manufactured efficiently. Further, even when continuous drawing of two or more passes is performed in order to increase the dimensional accuracy, it is not necessary to perform an inter-pass operation for supplying the lubricant, so that rapid continuous drawing can be performed. Examples of the material of the aluminum tube for the photosensitive drum substrate include an Al—Mn alloy, an Al—Mg alloy, an Al—Mg—Si alloy, and pure aluminum.
  • the lubricant can be reliably and efficiently applied to the inner surface of the tube in the continuous drawing process of a plurality of tube, which is suitable for mass production of aluminum tubes for photosensitive drum substrates. Yes.

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Abstract

Procédé pour étirer un tube brut tout en fournissant un agent lubrifiant à la surface intérieure du tube brut à partir d'une ouverture d'écoulement dans une tige, le procédé étant configuré de façon à ce que, sans l'emploi d'un élément d'application tel qu'une olive, l'agent lubrifiant se colle sans excès ni insuffisance sur la surface intérieure dans le sens tant de la circonférence que de la longueur du tube brut. Pendant qu'un tube métallique brut (2) est passé et étiré entre une filière (10), pour façonner la surface extérieure du tube brut, et un boulet (11), pour façonner sa surface intérieure, un agent lubrifiant (L) s'écoulant par intermittences d'une ouverture d'écoulement (21), qui est disposée dans la surface périphérique extérieure d'une tige (20) qui porte le boulet (11), vers une zone supérieure (40) qui est située à un endroit plus élevé à la verticale que le centre du tube brut (2), est pulvérisé et se colle à une partie de la surface intérieure du tube brut (2), ladite partie comprenant l'endroit le plus élevé (P1) de la surface intérieure du tube brut (2).
PCT/JP2011/056197 2010-03-19 2011-03-16 Procédé d'étirage de tube métallique WO2011115166A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180014732.0A CN102802826B (zh) 2010-03-19 2011-03-16 金属管的拉拔方法
US13/635,489 US20130192326A1 (en) 2010-03-19 2011-03-16 Method for drawing metallic tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-063464 2010-03-19
JP2010063464A JP5512341B2 (ja) 2010-03-19 2010-03-19 金属管の引抜方法

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WO2011115166A1 true WO2011115166A1 (fr) 2011-09-22

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CN103331573B (zh) * 2013-05-07 2015-11-25 昆山日皓焊切器材有限公司 一种焊接设备用铜管件的加工工艺
CN107504354B (zh) * 2015-09-12 2019-06-04 太仓升达机械有限公司 一种管材拉拔内腔加油装置的工作方法
CN107990135B (zh) * 2017-11-23 2020-06-16 西安诺博尔稀贵金属材料股份有限公司 一种管材拉拔润滑装置及管材拉拔加工方法

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JP2007268553A (ja) * 2006-03-30 2007-10-18 Sumitomo Electric Ind Ltd マグネシウム合金パイプの製造方法

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