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公开(公告)号：US08671729B2
公开(公告)日：2014-03-18
申请号：US12828535
申请日：2010-07-01
Applicant: Ravi Verma , Jon T. Carter , Paul E. Krajewski
Inventor： Ravi Verma , Jon T. Carter , Paul E. Krajewski
IPC: B21D37/16
CPC classification number: B21D37/16
Abstract: A method for stamping a desired shape from a sheet blank includes providing the sheet blank. The method also includes locally cooling the sheet blank with a stream of fluid in a predetermined area of high stress concentration to be experienced during forming of the sheet blank into a desired shape. The method additionally includes forming the metal sheet blank into the desired shape in a stamping press with a punch. A system employing the method for forming a sheet blank is also disclosed.
Abstract translation: 从片材坯料冲压所需形状的方法包括提供片坯。 该方法还包括在将片状坯料成形为所需形状期间经受的在应力集中的预定区域中的流体流局部冷却片状坯料。 该方法还包括在具有冲头的冲压机中形成所需形状的金属板坯料。 还公开了一种采用该片材坯料形成方法的系统。
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公开(公告)号：USRE43012E1
公开(公告)日：2011-12-13
申请号：US10122668
申请日：2002-04-15
Applicant: Moinuddin S. Rashid , Kulsum Rashid, legal representative , Chongmin Kim , Edward F. Ryntz , Frederick I. Saunders , Ravi Verma , Sooho Kim , Paul E. Krajewski
Inventor： Moinuddin S. Rashid , Chongmin Kim , Edward F. Ryntz , Frederick I. Saunders , Ravi Verma , Sooho Kim , Paul E. Krajewski
IPC: B21D26/02
CPC classification number: B21D26/021 , B21D26/029 , B21D26/053 , B21D26/055 , Y10T29/49805
Abstract: A method is disclosed for stretching magnesium-containing aluminum alloy sheet stock into intricate shapes such as are required in automotive body panels. The sheet stock, at a temperature in the range of about 400° C. to about 510° C., is stretched under the pressure of a working gas into conformance with the surface of a forming tool. The sheet forming pressure is increased continually in a controlled manner from ambient pressure to a final forming level in the range of about 250 psi to about 500 psi or higher. A portion of the sheet can experience strain rates substantially higher than 10−3 sec−1 and the forming of the sheet can be completed within 12 minutes.
Abstract translation: 公开了一种用于将含镁铝合金板料拉伸成汽车车身板中所需的复杂形状的方法。 在约400℃至约510℃的温度范围内的片材在工作气体的压力下被拉伸以与成形工具的表面一致。 片材成形压力以约250psi至约500psi或更高的范围内的环境压力以最终成形水平的受控方式连续地增加。 片材的一部分可以经历基本上高于10-3秒-1的应变速率，片材的形成可以在12分钟内完成。
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公开(公告)号：US08776372B2
公开(公告)日：2014-07-15
申请号：US12557583
申请日：2009-09-11
Applicant: Paul E. Krajewski , Ravi Verma
Inventor： Paul E. Krajewski , Ravi Verma
CPC classification number: B21K1/28 , B21K1/34 , B60B3/06 , Y10T29/49481 , Y10T29/49492 , Y10T29/49503 , Y10T29/49533
Abstract: A method of imparting superior fatigue performance to a vehicle wheel cast from a magnesium alloy by selective application of friction stir processing to regions of the casting known to be subject to high in-service stresses is described. The method may be particularly applicable to open wheel designs in which a plurality of spokes is used to connect the hub and rim portions of the wheel.
Abstract translation: 描述了通过选择性地施加摩擦搅拌处理对已知受到高使用应力的铸件的区域赋予从镁合金铸造的车轮优良的疲劳性能的方法。 该方法可以特别适用于其中使用多个辐条来连接轮毂和轮辋部分的开放轮设计。
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公开(公告)号：US20110239721A1
公开(公告)日：2011-10-06
申请号：US12754686
申请日：2010-04-06
Applicant: Jon T. Carter , Ravi Verma , Paul E. Krajewski
Inventor： Jon T. Carter , Ravi Verma , Paul E. Krajewski
CPC classification number: B21D26/021
Abstract: Metal sheets and thin-wall metal tubes may be heated to a hot working temperature and transformed by a hot-blow-forming step to achieve shapes, difficult to attain, without excessive thinning or strain causing damage to the workpiece based on the inherent formability of the metal alloy. The stages of forming of the intended shape in the metal workpiece are analyzed and workpiece regions of potential damage during forming are identified. Then, during actual forming, these regions of the hot workpiece are selectively cooled with air (or other cooling fluid) to reduce thinning or strain in the critical region(s) and to redistribute this strain to adjacent lower strain areas of the workpiece. This hot-blow-forming practice is particularly useful in attaining complex shapes in workpieces of aluminum-based alloys and magnesium-based alloys.
Abstract translation: 金属片和薄壁金属管可以被加热到热的工作温度，并且通过热吹塑成型步骤进行变形，以获得难以实现的形状，而不会由于固有的成形性而使过度的变薄或变形导致工件损坏 金属合金。 分析在金属工件中形成预期形状的阶段，并确定成形期间潜在损伤的工件区域。 然后，在实际成型期间，热空气（或其他冷却流体）的这些区域被选择性地冷却，以减少临界区域的变薄或应变，并将该应变重新分布到工件的相邻下部应变区域。 该热吹制法对于获得铝基合金和镁基合金的工件中的复杂形状特别有用。
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公开(公告)号：US20110214472A1
公开(公告)日：2011-09-08
申请号：US12828535
申请日：2010-07-01
Applicant: Ravi Verma , Jon T. Carter , Paul E. Krajewski
Inventor： Ravi Verma , Jon T. Carter , Paul E. Krajewski
IPC: B21D37/16
CPC classification number: B21D37/16
Abstract: A method for stamping a desired shape from a sheet blank includes providing the sheet blank. The method also includes locally cooling the sheet blank with a stream of fluid in a predetermined area of high stress concentration to be experienced during forming of the sheet blank into a desired shape. The method additionally includes forming the metal sheet blank into the desired shape in a stamping press with a punch. A system employing the method for forming a sheet blank is also disclosed.
Abstract translation: 从片材坯料冲压所需形状的方法包括提供片坯。 该方法还包括在将片状坯料成形为所需形状期间经受的在应力集中的预定区域中的流体流局部冷却片状坯料。 该方法还包括在具有冲头的冲压机中形成所需形状的金属板坯料。 还公开了一种采用该片材坯料形成方法的系统。
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Patent Agency Ranking
公开(公告)号：US20100024924A1
公开(公告)日：2010-02-04
申请号：US12181618
申请日：2008-07-29
Applicant: Paul E. Krajewski , Ravi Verma , Jon T. Carter , Joshua D. Lasceski
Inventor： Paul E. Krajewski , Ravi Verma , Jon T. Carter , Joshua D. Lasceski
IPC: C21D11/00
Abstract: The formability of coiled and annealed (O-temper) magnesium alloy sheet material in high temperature forming operations is sometimes adversely affected by small amounts of cold work introduced into the fine grained material during handling of the coil and unwinding it to obtain blank workpieces for hot stamping, hot blow forming, or the like. When necessary, the formability of the sheet material with regions of hard worked microstructure may be improved by predetermining a recovery heat treatment using small portions of the material in formability tests. The recovery heat treatment, determined for the specific coiled stock, may then be applied to the material of the coil as it is used in making vehicle body panels or the like.
Abstract translation: 卷取退火（O型）镁合金板材在高温成型操作中的成形性有时受到在处理线圈期间引入细粒材料的少量冷加工和退火以获得用于热的坯料的空白工件的不利影响 冲压，热吹塑等。 必要时，可以通过在成形性试验中使用小部分材料预先确定回收热处理来提高具有硬化微结构区域的片材的成形性。 然后，对于特定的卷绕原料确定的回收热处理可以用于制造车身面板等时用于线圈的材料。
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公开(公告)号：US08357250B2
公开(公告)日：2013-01-22
申请号：US12181618
申请日：2008-07-29
Applicant: Paul E. Krajewski , Ravi Verma , Jon T. Carter , Joshua D. Lasceski
Inventor： Paul E. Krajewski , Ravi Verma , Jon T. Carter , Joshua D. Lasceski
IPC: C21D11/00
Abstract: The formability of coiled and annealed (O-temper) magnesium alloy sheet material in high temperature forming operations is sometimes adversely affected by small amounts of cold work introduced into the fine grained material during handling of the coil and unwinding it to obtain blank workpieces for hot stamping, hot blow forming, or the like. When necessary, the formability of the sheet material with regions of hard worked microstructure may be improved by predetermining a recovery heat treatment using small portions of the material in formability tests. The recovery heat treatment, determined for the specific coiled stock, may then be applied to the material of the coil as it is used in making vehicle body panels or the like.
Abstract translation: 卷取退火（O型）镁合金板材在高温成型操作中的成形性有时受到在处理线圈期间引入细粒材料的少量冷加工和退火以获得用于热的坯料的空白工件的不利影响 冲压，热吹塑等。 必要时，可以通过在成形性试验中使用小部分材料预先确定回收热处理来提高具有硬化微结构区域的片材的成形性。 然后，对于特定的卷绕原料确定的回收热处理可以用于制造车身面板等时用于线圈的材料。
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公开(公告)号：US20110062770A1
公开(公告)日：2011-03-17
申请号：US12557583
申请日：2009-09-11
Applicant: Paul E. Krajewski , Ravi Verma
Inventor： Paul E. Krajewski , Ravi Verma
CPC classification number: B21K1/28 , B21K1/34 , B60B3/06 , Y10T29/49481 , Y10T29/49492 , Y10T29/49503 , Y10T29/49533
Abstract: A method of imparting superior fatigue performance to a vehicle wheel cast from a magnesium alloy by selective application of friction stir processing to regions of the casting known to be subject to high in-service stresses is described. The method may be particularly applicable to open wheel designs in which a plurality of spokes is used to connect the hub and rim portions of the wheel.
Abstract translation: 描述了通过选择性地施加摩擦搅拌处理对已知受到高使用应力的铸件的区域赋予从镁合金铸造的车轮优良的疲劳性能的方法。 该方法可以特别适用于其中使用多个辐条来连接轮毂和轮辋部分的开放轮设计。
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公开(公告)号：US20100096046A1
公开(公告)日：2010-04-22
申请号：US11554193
申请日：2006-10-30
Applicant: Paul E. Krajewski , Ravi Verma , Jon T. Carter
Inventor： Paul E. Krajewski , Ravi Verma , Jon T. Carter
CPC classification number: B23K31/027 , B21C37/065 , B21C37/08 , B21D26/033 , B23K2101/06 , B23K2103/15 , C21D8/10
Abstract: A method that improves the formability of magnesium and magnesium tubes without altering the chemistry of such material or requiring changes to formation tooling. Magnesium or magnesium alloy sheet stock is subjected to at least one cycle of roll-forming deformation in a first direction followed by a reversal of roll-forming deformation and progressive development of a substantially circular cross-section. Lateral edges of the sheet are adjoined and the structure is thereafter heated above the recrystallization temperature.
Abstract translation: 提高镁和镁管的成型性而不改变这种材料的化学性质或需要改变成型工具的方法。 镁或镁合金片材在第一方向上经受至少一个辊轧变形循环，随后是辊轧变形反转和逐渐发展大致圆形的横截面。 板的侧边缘相邻，然后将该结构加热到再结晶温度以上。
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公开(公告)号：US07661282B2
公开(公告)日：2010-02-16
申请号：US12052781
申请日：2008-03-21
Applicant: Jon T. Carter , Paul E. Krajewski , Ravi Verma , Joshua D. Lasceski
Inventor： Jon T. Carter , Paul E. Krajewski , Ravi Verma , Joshua D. Lasceski
CPC classification number: B21D22/02
Abstract: Magnesium and other metal alloy sheet materials are deformed at hot forming temperatures into vehicle body panels and other articles. Many such hot forming operations are improved in speed and product quality by predetermining a static recrystallization temperature of the sheet material. As the sheet material is being heated to its hot forming temperature, deformation is commenced below the static recrystallization temperature. As heating and deformation are continued, dynamic recrystallization of the workpiece occurs and deformation may proceed faster and to a greater extent.
Abstract translation: 镁和其他金属合金板材在热成型温度下变形成车体板和其他物品。 许多这样的热成型操作通过预先确定片材的静态再结晶温度而提高了速度和产品质量。 当片材被加热到其热成型温度时，在静态再结晶温度以下开始变形。 随着加热和变形的继续，工件发生动态再结晶，变形可能会更快和更大程度地进行。
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