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46results about How to "Reduce mechanical strain" patented technology

Solder and material designs to improve resistance to cycling fatigue in laser diode stacks

Laser modules that are operated intermittently are prone to stop operating after only a few thousand cycles or less. The laser modules sometimes experience a significant increase in operating temperature before they stop operating and, in some cases, manifest an opening of the electrical circuit that connects the laser diodes in the stack of laser subassemblies. In extreme cases, the laser module disintegrates into component subassemblies. These problems arise from structural failures in affixing agents like solder that are used to affix component parts to each other. The structural failures are caused by cyclical thermal expansion and contraction of component parts that exceed the elastic limit of the solder. Resistance to global plastic deformation (creep) and to local plastic deformation (fatigue) is improved by selecting materials to reduce mechanical strain and increase resistance to creep and fatigue, by altering the structural design of the laser module to reduce mechanical strain induced into the affixing agents, and by altering operational practices to reduce the range of temperatures imposed on laser module components. One design method improves resistance to creep and fatigue by controlling the thickness of the affixing agents used to affix component parts to each other.
Owner:JDS UNIPHASE CORP

Heat preservation cylinder clamping groove device for sintering furnace

The invention belongs to the technical field of sintering furnace parts and relates to a heat preservation cylinder clamping groove device for a sintering furnace. The device comprises a plurality ofend face clamping strips which can be spliced with one another; all the end face clamping strips can be spliced into an annular support coaxial with a heat preservation cylinder; the inner diameter ofthe annular support is smaller than that of the heat preservation cylinder; one side face of each end face clamping strip can be tightly attached to the end face of the heat preservation cylinder, wherein the side face of each end face clamping strip a sealing face; the sealing faces of the end face clamping strips are provided with flow-resisting blocking edges extending in the axial direction of the heat preservation cylinder; the flow-resisting blocking edges can be spliced with one another to form a flow-resisting ring which is coaxial with the annular support and is attached to the innersurface of the end part of the heat preservation cylinder; the flow-resisting blocking edges are curved strips; the inner arc surface of each of the flow-resisting blocking edges can be closely adhere to the inner wall surface of the heat preservation cylinder through a locking mechanism. According to the heat preservation cylinder clamping groove device for the sintering furnace of the invention, the use damage of the heat preservation cylinder can be decreased, and therefore, the stability of the heat preservation cylinder can be improved, and the service life of the heat preservation cylinder can be prolonged.
Owner:ZHUZHOU RUIDEER METALLURGICAL EQUIP MFG CO LTD
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