77results about How to "High mechanical load capacity" patented technology

The invention discloses a manufacturing method of a multilayer shell-core composite structural part, which comprises the following steps of: (1) respectively preparing feed for injection forming of a core layer, a transition layer and a shell layer, wherein powder in the feed of the core layer and the powder in the feed of the shell layer are selected from one or a mixture of some of metal powder, ceramic powder, or toughened ceramic powder and are different from each other, and the powder in the feed of the transition layer is gradient composite powder; (2) respectively manufacturing blanks of the multilayer shell-core composite structural part layer by layer with a powder injection forming method; (3) degreasing the blanks; and (4) sintering the blanks to obtain the multilayer shell-core composite structural part. The multilayer shell-core composite structural part is manufactured with the powder injection forming method, and has the advantages of high surface hardness, abrasion resistance, uniform thickness of the shell layer, stable and persistent performance, strong binding force between the shell layer and the core layer due to the transition layer, good integral bending strength and good impact toughness and is difficult to crack.

A lightweight structure at least sectionally composed of a plurality of connected mosaic elements and/or skin mosaic elements. The lightweight structure allows an essentially load-appropriate arrangement of the mosaic elements and/or the skin mosaic elements including the optional skin. The lightweight structure requires a significantly reduced number of connecting elements, such that the assembly effort can be reduced and an additional weight reduction can be achieved. Also, two variations of a method for manufacturing a lightweight structure are provided. Large-format lightweight structures such as, for example, an aircraft fuselage cell or partial shells thereof can also be manufactured in a reliable and dimensionally accurate fashion because only mosaic elements and skin mosaic elements, with relatively small dimensions, need to be handled. Other applications of the lightweight structure include launch vehicles, rocket stages, space stations, space station modules, satellites and masts or towers of wind power plants.

Disclosed is a floor panel, in particular for covering floors of cargo holds of aircraft. The floor panel is formed by a plurality of milled profiles, which are friction stir welded in each case along their longitudinal edges, with preference continuously to form longitudinal (butt) seams. The milled profiles each form a beam “of equal stress”, with an upper flange and a lower flange which are spaced apart from one another along their extent. The milled profiles have in each case a double-T-shaped cross-sectional profile, the upper flanges and the lower flanges being respectively connected by webs. With preference, the milled profiles are milled out in one piece from solid material of a sufficiently tough aluminium alloy. The joining together of the floor panel including a plurality of milled profiles that are arranged in parallel and friction stir welded allows a high mechanical load-bearing capacity of the floor panel in comparison with conventional sandwich floor panels along with a comparatively low weight.

A hollow chamber structural component includes a shell component which extends along a main extension direction. A cover component is attached to the shell component, wherein a hollow chamber is disposed between the shell component and the cover component and extends in the main extension direction. A reinforcing structure is arranged in the hollow chamber and comprises: a synthetic support structure, which follows at least in some sections the main extension direction and rests with at least some sections against an inside of the shell component; and at least one reinforcing element that follows at least in some sections the main extension direction and is joined to the synthetic support structure with the aid of a layer of adhesive.

A method of manufacturing fastenings or fasteners with radial outer contours, especially screws or threaded bolts, made of solid metal is performed by a device. The method manufactures the fasteningsor fasteners preferably on a multi-stage press. Several recesses running in an axial direction at a fixed radial distance are formed in the shank-shaped section of a blank. The prefabricated blank with the recesses is inserted into a multi-part split mold within a multi-stage press, whose die stocks have an inner profiling forming the outer contour, and are opened in the starting position, that atthe places where the die stocks are opened, there are the recesses. During the closing movement of the die stocks, at least one radial outer contour is pressed on the shank-shaped section of the blank by radial action of forces, with the recesses preventing material from getting between the die stocks during the pressing process.

There is disclosed a medical or dental hand-piece element comprising a coupling mechanism for a detachable connection of the hand-piece element to a drive unit, a tool receptacle that is or can be connected to the hand-piece element, and a drive element for transmitting a driving movement from the drive unit to the tool receptacle so that the tool receptacle can be set into a working movement, wherein the drive element comprises at least one rotatable shaft, and a generator for converting mechanical energy into electric energy, wherein the generator can be driven by the at least one rotatable shaft of the drive element.

The invention provides a preparation method of a special-shaped carbon fiber composite I-beam and the special-shaped I-beam prepared through the method. The preparation method of the special-shaped carbon fiber composite I-beam comprises the steps that a setting agent is scattered on carbon fiber fabric according to the mass of 3-8 g/m<2>, heat setting is conducted, the fabric is cut into the required shape through a cutting machine after setting of the carbon fiber fabric is completed, the fabric cut into the specific shape is laid on a mold prepared in advance in an attached mode, so that a prefabricated body is obtained, and the prefabricated body is placed in a vacuum bag to be stored in an airtight mode after laying is completed; composite liquor is formed, so that a crude special-shaped carbon fiber composite I-beam is obtained; and the finished special-shaped carbon fiber composite I-beam is obtained by treating the crude special-shaped carbon fiber composite I-beam. The special-shaped carbon fiber composite I-beam is high in bearing capacity, good in rigidity, low in self weight and high in surface smoothness, the porosity of a product is low, and the outer surface dimension and the resin content can be controlled accurately.

A structural health monitoring system includes a signal transmission element and a sensor unit. The sensor unit is designed to feed a first signal into the signal transmission element and to read out a second signal from the signal transmission element. The signal transmission element has carbon nanotubes.

The invention relates to a backflow preventer having a housing, which has an inlet opening, an outlet opening and at least one leakage opening disposed between these openings and accommodates first and second nonreturn valves disposed in series, the first nonreturn valve being held displaceably in order to open up and close a flow connection between an intermediate space of the housing and the leakage opening. To develop the backflow preventer in such a manner that an inadmissible increase in pressure in the region of the outlet opening can be avoided in a structurally simple way, according to the invention it is proposed that the housing comprises an inner housing and an outer housing, the outer housing having the at least one leakage opening and the inner housing accommodating the two nonreturn valves and being held such that it can be displaced to and fro in the direction of through-flow within the outer housing, and the inner housing having an outlet opening, via which the flow connection between the intermediate space and the leakage opening can be produced independently of the position of the inner housing, by displacement of the first nonreturn valve relative to the second nonreturn valve.

The invention provides a fabric punched felt complex and a preparation method thereof. The preparation method comprises the following steps: compounding a continuous functional fiber fabric layer and a continuous functional fiber bulked yarn crude fabric layer together so as to obtain integrated fabric; then compounding a chopped functional fiber punched felt layer with the continuous functional fiber bulked yarn crude fabric layer of the integrated fabric through needling so as to obtain the fabric punched felt complex. The fabric punched felt complex has a light and high strength structure with stepped intensity changes. The weight of the fabric punched felt complex is 30% lighter than that of complete fabric with a same volume, while the mechanical performance of the fabric punched felt complex is equal to that of complete fabric with a same volume, and is better than that of complete chopped fiber punched felt. At the same time the fiber raw material is saved by 30% or more, moreover the preparation technology is simple, and the production period is short.

The invention discloses a super-structure honeycomb composite wave-absorbing material, belonging to the technical field of wave-absorbing materials. The invention particularly relates to a honeycomb structure-metamaterial composite wave-absorbing material, which is mainly composed of an upper wave-transmitting skin layer, a middle sandwiched aramid fiber wave-absorbing honeycomb wave-absorbing layer and a bottom metamaterial wave-absorbing layer, wherein the three layers of materials are bonded through an epoxy resin adhesive. The metamaterial wave-absorbing layer is formed by manufacturing ametamaterial array on a printed circuit board, and the metamaterial array is an array formed by diamond-shaped, square, hollow-square-shaped or cross-shaped metal units. A metamaterial wave-absorbingbody and the honeycomb wave-absorbing material are creatively combined, and the broadband wave absorbing performance and the low-frequency wave absorbing function of the super-structure honeycomb composite wave-absorbing material are achieved through the selective wave absorbing function of the metamaterial wave-absorbing body.

The invention discloses a structural composite wave-absorbing material and a preparation method thereof, which belong to the technical field of materials. The structural composite wave-absorbing material is composed of a fiber-reinforced resin-based composite material, an absorbent and a metamaterial wave-absorbing structure. Different layers of fiber cloth are uniformly coated with resin and a mixture of resin and absorbent and are combined with the metamaterial wave-absorbing structure to form a laminated structure to obtain the wave-absorbing material. According to the composite wave-absorbing material with the structure, the bearing mechanical property of the composite material structure is maintained, meanwhile, the material absorption bandwidth is effectively widened, and strong absorption of key frequency bands is realized.

The present invention relates to a plug-in apparatus combination with an apparatus base and a plug-in module, wherein, the plug-in module can be plugged into the apparatus base. The apparatus base has a base housing with a recess for receiving the plug-in module, a linkage terminal for a conductor of a power grid to be protected, and a plug-in contact linked with the linkage terminal. The plug-in module has a plug housing, a protective element arranged in the plug-in housing, and a linkage plug-in contact corresponding to the plug-in contact. In the apparaut combination, locking and replacement of the plug-in module are executed thereby, namely, a latching linkage portion acting between the apparatus base and the plug-in module has a latching arm with a latching mechanism and a groove, the latching linkage portion is arranged on the wall opposite to the latching arm, a latching hook of the latching arm is used for guding when the plug-in module is plugged into the apparatus base. The groove has a first region, a second region, and a third region, and the deepth of the groove is too small in the end of the third region so that the latching hook does not guide in the groove.