CN106964660B - 一种用于金属管材冷拔减壁的长芯棒装置 - Google Patents

一种用于金属管材冷拔减壁的长芯棒装置 Download PDF

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CN106964660B
CN106964660B CN201710306963.8A CN201710306963A CN106964660B CN 106964660 B CN106964660 B CN 106964660B CN 201710306963 A CN201710306963 A CN 201710306963A CN 106964660 B CN106964660 B CN 106964660B
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metal pipe
right end
pipe material
end cap
plug
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CN106964660A (zh
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帅美荣
李华英
李海滨
楚志兵
秦建平
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Taiyuan University of Science and Technology
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Taiyuan University of Science and Technology
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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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Abstract

一种用于金属管材拉拔减壁的长芯棒装置，属于金属管材冷拔技术领域。特征是：左、右两端分别制有加压孔和加油孔的芯轴套装在管状的芯棒外套内，制有中心孔的左、右端盖通过左、右螺钉组分别与芯棒外套左、右端连接，左、右端盖的中心孔分别与加压孔、加油孔连通，并与加压装置接口和加油装置接口连通，左端盖的外侧与拉拔头连接。优点是减少脱棒过程中对金属管材的端部和内、外表面的损伤；减轻大直径薄壁金属管减壁加工的芯棒重量；减少芯棒表面磨损，延长芯棒使用寿命；简化金属管内表面的润滑工艺，减少润滑剂消耗和环境污染。

Description

一种用于金属管材冷拔减壁的长芯棒装置
技术领域
本发明属于金属管材冷拔技术领域，具体涉及一种用于金属管材冷拔减壁的长芯棒装置。
背景技术
目前，在金属管材减壁变形加工的生产过程中，采用的芯棒均为单层金属或多层金属构成的实心芯棒。主要形式有两种，一种是短芯棒，如图1所示，主要用于金属管材的冷轧与冷拔加工过程中。特征是：芯棒长度稍长于金属管材变形区的长度，在变形过程中，芯棒在变形区内有固定的位置，芯棒与金属管材之间存在相对运动。缺点是芯棒表面与金属管材接触表面润滑困难，会产生强烈的滑动摩擦，导致金属管材的内表面状态变坏，易于形成划伤、粘接等缺陷，使得变形加工过程的能量消耗增加，增大薄壁管拉拔减壁时的拉断率。另一种是长芯棒，主要用于金属管材热轧减壁延伸的加工过程中。特征是：芯棒长度大于或接近于金属管材的长度，在变形过程中，芯棒在变形区内是运动的，芯棒与金属管材之间可以存在、也可以不存在相对运动，即“浮动芯棒”和“限动芯棒”的生产方式。缺点是脱棒困难，长芯棒很少用于金属管材的冷拔减壁生产过程中，尤其是大直径薄壁金属管的减壁变形加工。
发明内容
本发明的目的是提供一种用于金属管材冷拔减壁的长芯棒装置，可以有效地克服现有技术存在的缺点。
本发明是这样实现的：如图2所示：其特征是：左、右两端分别制有加压孔9和加油孔10的芯轴6穿装在管状的芯棒外套7内，左、右端盖8、8/通过左、右螺钉组16、16/分别与芯棒外套7左、右端部相连接，左、右端盖8、8/分别与芯轴6左、右端部相抵触，左、右端盖8、8/的中心制有的中心孔分别与芯轴6左、右端的加压孔9、加油孔10相连通，并与左端加压装置接口11和右端加油装置接口12相连通，左端盖8的外侧与拉拔头13连接。
本发明的优点及积极效果是：
(1)减少脱棒过程中对金属管材的端部和内、外表面的损伤；
(2)减轻大直径薄壁金属管减壁加工的芯棒重量；
(3)减少芯棒表面磨损，延长芯棒使用寿命；
(4)简化金属管内表面的润滑工艺，减少润滑剂消耗和环境污染。
附图说明
图1为金属管材短芯棒拉拔变形加工过程图；
图2为本发明结构剖视图；
图中：1—拉拔固定模；2—金属管坯；3—固定芯杆；4—短芯棒；5—供拉拔夹持的管头；6—芯轴；7—芯棒外套；8—左端盖；8/—右端盖；9—加压孔；10—加油孔；11—加压装置接口；12—加油装置接口；13—拉拔头；14—拉拔辊模；15—储油腔；16—左螺钉组；16/—右螺钉组。
具体实施方式
本发明实施例为：
如图2所示：当要进行实施拉拔钢管时，首先将金属管坯2套装在芯棒外套7的外面，再将长芯棒装置放置在拉拔辊模14内，再由加油装置接口12通过加油孔10向储油腔15内加油，再由加压装置接口11通过加压孔9向储油腔15内加压，使储油腔15内压力达到0.63-40Mpa之间，再通过拉拔头13对长芯棒装置施加拉力，使金属管坯2经过拉拔辊模14减壁，达到设计尺寸要求。减壁加工完成后，通过加压装置接口11进行减压，芯棒外套7处于回缩状态，使芯棒外套7和金属管坯2之间压力松弛、消失，产生间隙，将金属毛管退出，完成金属管冷拔加工过程。

Claims (1)

1.一种用于金属管材冷拔减壁的长芯棒装置，其特征是：左、右两端分别制有加压孔（9）和加油孔（10）的芯轴（6）穿装在管状的芯棒外套（7）内，左、右端盖（8、8/)通过左、右螺钉组（16、16/）分别与芯棒外套（7）左、右端部相连接，左、右端盖（8、8/）分别与芯轴（6）左、右端部相抵触，左、右端盖（8、8/）的中心制有的中心孔分别与芯轴（6）左、右端的加压孔（9）、加油孔(10)相连通，并与左端加压装置接口(11)和右端加油装置接口(12)相连通，左端盖(8)的外侧与拉拔头(13)连接。
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CN110449476A (zh) * 2019-07-26 2019-11-15 安徽鑫旭新材料有限公司 一种中空自冷却大载荷输电铜排加工工艺
CN114603312B (zh) * 2020-12-09 2024-04-30 常州市联谊特种不锈钢管有限公司 高精密隔磁套管的生产工艺

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB104117A (en) * 1916-08-29 1917-02-22 John Thomas Knowles Improvements relating to the Manufacture of Pipes or Tubing, particularly the Removal of Interior Burrs or similar Irregularities of Surface.
US2173099A (en) * 1937-01-28 1939-09-19 Vascoloy Ramet Corp Means and method of tube drawing
US2943729A (en) * 1956-05-18 1960-07-05 Boeing Co Contractable ram mandrels
US4195390A (en) * 1977-01-03 1980-04-01 Scientific Technologies, Inc. Apparatus and method for manipulation and sleeving of tubular members
US4697447A (en) * 1985-01-22 1987-10-06 National Research Development Corporation Plug drawing of tubes and other hollow items
DE102012107375A1 (de) * 2011-08-12 2013-02-14 GFM - GmbH Vorrichtung zum Schmieden eines Hohlkörpers
CN106391713A (zh) * 2016-10-31 2017-02-15 太原科技大学 一种金属管材的芯棒轧制方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB104117A (en) * 1916-08-29 1917-02-22 John Thomas Knowles Improvements relating to the Manufacture of Pipes or Tubing, particularly the Removal of Interior Burrs or similar Irregularities of Surface.
US2173099A (en) * 1937-01-28 1939-09-19 Vascoloy Ramet Corp Means and method of tube drawing
US2943729A (en) * 1956-05-18 1960-07-05 Boeing Co Contractable ram mandrels
US4195390A (en) * 1977-01-03 1980-04-01 Scientific Technologies, Inc. Apparatus and method for manipulation and sleeving of tubular members
US4697447A (en) * 1985-01-22 1987-10-06 National Research Development Corporation Plug drawing of tubes and other hollow items
DE102012107375A1 (de) * 2011-08-12 2013-02-14 GFM - GmbH Vorrichtung zum Schmieden eines Hohlkörpers
CN106391713A (zh) * 2016-10-31 2017-02-15 太原科技大学 一种金属管材的芯棒轧制方法

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