Abstract:
A method and apparatus for forming and consolidating organic matrix composites. An organic matrix composite panel comprising laid-up prepregs is placed between sheets of a susceptor material that is susceptible to inductive heating to form a workpiece. The resulting workpiece is placed within upper and lower dies formed of a material that is not susceptible to inductive heating. An induction coil embedded within the dies is energized and inductively heats the susceptor sheets surrounding the panel. The sheets in turn conductively heat the organic matrix composite panel. A pressure zone between the workpiece and one of the dies is pressurized to form the workpiece to the contour of a forming surface on one of the dies. The pressure in the pressure zone is maintained on the workpiece until the organic matrix composite panel is fully consolidated and formed.
Abstract:
The present invention provides for a frame construction which comprises frames wherein a machining tool and functional devices for making the tool operate are mounted on separate frames, and the respective frames can run independently. The present invention also provides a machining device which utilizes the aforementioned frame construction so that machining accuracy can be maintained irrespective of the weight of the functional devices mounted on the frame.
Abstract:
There has been provided a process for spot welding a stack of thin metal strips or layers with a non-depositing welder gun. The process involves forming a stack of thin metal layers, compressing the layers between the jaws of a press, one of which has at least one receptacle for and adapted to receive the non-depositing welder gun tip, placing the gun in the receptacle, optionally flooding with an inert gas, and applying electrical power to the gun for a period of from 1 to 10 seconds. The process is especially useful in the formation of a stack of thin metal strips for making a multicellular honeycomb converter body for removing pollutants from the exhaust of an internal combustion engine.
Abstract:
Multisheet SPF parts with braze joints at selected locations are produced with improved energy efficiency and at lower cost by heating the multisheet pack to its superplastic forming range below the melting point of the braze alloy, superplastically forming the pack to define braze joints having unmelted braze alloy; increasing the temperature to the braze temperature of the braze alloy, and cooling the pack below the superplastic range to freeze the braze alloy in the braze joint.
Abstract:
A metal matrix composite is made by roll consolidating a sandwich formed from alternating layers of a matrix metal, a brazing alloy, and reinforcing fiber at elevated temperature and pressure. If made in a process using mandrels to impart the pressure and heat, such as a process described in U.S. Pat. No. 5,229,562, the metal matrix composite is kept separate from the mandrels by using a release agent or stop-off such as a layer of boron nitride between the mandrel and layup.
Abstract:
A plate cutting device having a cutting member for cutting a workpiece vertically or aslant comprises a stand and the cutting member coupled with a hose or a cord, an end of the hose or cord being connected to a part of said stand. An inclining device for inclining the cutting member about an axis parallel to a cutting direction is provided with the plate cutting device. A swinging device is coupled with the inclining device for changing the pointing direction of the cutting member with respect to the plate cutting direction. A cutting member holder is attached to the inclining device, for holding said cutting member so as to allow it to revolve with respect to the inclining device. Therefore, when the cutting member is swung and the hose or cord begins to twist, the holder will revolve and allow the hose or cord to untwist.
Abstract in simplified Chinese:本发明提供一种电弧熔接接头,其能够抑制锌系电镀钢板的始端部和终端部产生气孔,并减少熔接部整体的气孔占有率。 本发明是一种电弧熔接接头,其整个熔接总长度的气孔占有率小于30%,且是借由以下的锌系电镀钢板的电弧熔接方法来获得,该电弧熔接方法是将板间空隙设置在0.2~1.5mm的范围内,该电弧熔接方法,包含下述步骤:第1步骤,其自熔接开始点以第1熔接速度来移动熔接手段,并给予第1熔接输入热量来实行熔接;第2步骤,其接续第1步骤,以第2熔接速度来移动熔接手段,并给予第2熔接输入热量来实行熔接;及,第3步骤,其接续第2步骤,停止移动熔接手段,并在该停止位置实行熔接0.1~2秒;其中,前述第1步骤包含熔接部,该熔接部是以下述条件来实行熔接,该条件是前述第1熔接速度低于前述第2熔接速度,且前述第1熔接输入热量超过前述第2熔接输入热量;并且,前述第3步骤是以比前述第2步骤更低的熔接电流和熔接电压来实行熔接。