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355results about "Key type connections" patented technology

Mechanical fastener system for high-temperature structural assemblies

A relatively low cost, lightweight and thermal stress-free mechanical fastener system having particular application for reliably joining together high temperature structural members (e.g., a pair of flat fiber-reinforced ceramic composite plates). The mechanical fastener system includes a ceramic composite fastener having a semi-circular head at one end to be countersunk in the structural members to be joined together and a dove tail retention feature formed in the shank or root at the opposite end. The composite fastener has a 2-dimensional (i.e., flat) profile that facilitates an economic manufacture thereof from densified ceramic composite material. A matched pair of thread forms having external threads and an internal dove tail relief to match the dove tail retention feature at the root of the composite fastener is held in face-to-face mating engagement with one another so as to establish a mechanical interlock around the root of the composite fastener. A 2-dimensional ceramic backing washer has a rectangular center hole dimensioned to receive the root of the composite fastener therethrough. A nut having internal threads that correspond to the external threads of the pair of thread forms is rotated into surrounding engagement with the thread forms to prevent a removal of the composite fastener and a separation of the structural members.
Owner:ROLLS ROYCE HIGH TEMPERATURE COMPOSITES INC

Unit For Connecting Parts

The invention relates to detachable connections of parts, primarily rigid parts, and can be used, in particular, for connecting elements of building structures. The unit for connecting parts with a curvilinear surface comprises protrusions which are formed on those sides of the parts which are to be joined, said protrusions having bulb-like enlargements at the ends and necks at the bases thereof, and grooves which are complementary to the protrusions and constitute bulb-like recesses corresponding to the bulb-like enlargements of the protrusions and merging into cavities corresponding to the necks of the protrusions.; The surfaces of the ends of the protrusions and adjoining surfaces of the bottom of the grooves have a conical shape, and the vertices of the surfaces of the ends of the protrusions and of the bottom of the grooves are arranged along different sides relative to the parts to be connected, the lateral surfaces of the protrusions and adjoining lateral surfaces of the grooves are formed by moving a straight line along a guide, which constitutes an intersecting line of a spherical surface with a cylindrical surface formed by moving the straight line along an S-like guide. The lateral surfaces of the protrusions and the lateral surfaces of the grooves are smoothly joined to the surfaces of the ends of the protrusions and surfaces of the bottom of the grooves, respectively.
Owner:维达里基库祖耶维斯 +1

Cold extruding processing method of spline housing and spline housing produced by same

The invention relates to a cold extruding processing method of a spline housing and the spline housing produced by the same. The cold extruding processing method of the spline housing comprises the following steps: blanking of a tubular blank, annealing of the blank, performing turning on an inner bore, saponification of phosphorus, hole shrinkage and extrusion, cold extrusion of the spline and turning and shaping. The wall thicknesses of the larger end, transmission section, and smaller end of the spline manufactured by the method are equal, wherein yield torsion of the spline housing is more than 30,000Nm. The invention has the beneficial effects: firstly, the application of two cold extruding molding processes ensures that the strengthen of the material are improved after the cold-workhardening, the whole part is designed in an equicohesive manner, and greatly improves the material utilization and reduces the process cost; secondly, the processing procedures are reduced, the processing cycle of the part is shorten, and the production efficiency is improved while the cost is lowered; and thirdly, the hot processing procedures such as forging and tempering with high-energy consumption and pollution are cancelled, thus achieving obvious effects of energy saving and emission reduction.
Owner:WANXIANG QIANCHAO TRANSMISSION SHAFT +1
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