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 PDFInfo
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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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- 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
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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
- 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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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
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 |
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Citations (7)
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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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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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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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