17 results about "Composite joint" patented technology

The invention belongs to the technical field of composite material impact, and discloses a composite material joint impact test fixture capable of applying preload, which comprises a support base, a loading block, a sliding strip, a movable pressing plate, a limiting plate, a threaded rod and a composite material joint, the supporting base provides support for each component, and the loading block is arranged in a sliding groove of the supporting base and slides in the sliding groove through sliding strips installed on grooves in the two sides; the two movable pressing plates are located in the straight groove rails of the supporting base and the loading block respectively, make contact with the upper surfaces of the two ends of the composite material connector under the action of gravity and are fixedly connected to the supporting base and the loading block through bolts. The threaded rod penetrates through the threaded through hole of the end baffle and is fixedly connected with the loading block through a limiting bolt; the handle at the tail of the threaded rod is rotated to enable the loading block to move in the sliding groove, and by means of the self-locking property of threads, uniform preload is applied to the composite material connector.

The present invention provides a robot, comprising: a head and an arm. The head has a shell and an interactive part, the interactive part being composed of a kneading component and a feedback component. The kneading component is connected to the shell, the shell is fitted onto the robot's head, and the kneading component is signal-connected to the feedback component. The arm has a skeleton component and a drive component. The skeleton component has a first bone, a second bone, and a composite joint. The first bone and the second bone are movably connected through the composite joint. The drive component has a shaft flange, one end of which is connected to the robot's body, and the other end is poweredly connected to the first bone.

The invention provides a robot arm which has a good anti-pulling function and specifically comprises a framework assembly and a driving assembly. The skeleton assembly is provided with a first skeleton, a second skeleton and a composite joint, and the first skeleton and the second skeleton are movably connected through the composite joint; one end of the shaft flange is connected with the robot body, and the other end of the shaft flange is in power connection with the first skeleton.

The present application relates to the field of metal composite plate explosion welding, and provides a sample, a tool and a method for Z-direction fatigue test of an explosion composite joint, the sample comprising at least a top layer and a bottom layer, and the sample comprising at least one interface, the sample comprising: a circumferential boss part composed of an upper part of the top layer; a central column part arranged below the circumferential boss part, the central column part comprising at least a lower part of the top layer and the bottom layer; a tapered transition part arranged between the circumferential boss part and the central column part; an upper central through hole opened downward from the top of the sample and extending to below the interface to be tested by more than 1mm; and a lower central through hole in communication with the upper central through hole. The sample for Z-direction fatigue test of the explosion composite joint, one, controls the fatigue failure surface at the interface, and realizes accurate determination of the Z-direction fatigue performance of the explosion composite joint; two, does not easily cause interface fracture during installation; and three, can satisfy tensile-tensile fatigue, tensile-compressive fatigue and compressive-compressive fatigue tests.

The application discloses a composite material joint tool, which comprises a core mold and a supporting platform, and the core mold is fixedly arranged on the supporting platform; the core mold comprises a left core mold, a middle core mold and a right core mold, and the left core mold, the middle core mold and the right core mold are spliced together to form the core mold; the width of one end of the middle core mold contacting the supporting platform is greater than the width of the other end; the width of one end of the left core mold and the right core mold contacting the supporting platform is respectively smaller than the width of the other end; the one end of the middle core mold contacting the supporting platform is provided with a first bolt hole; the one end of the left core mold and the right core mold contacting the supporting platform is respectively provided with a light hole; the supporting platform is provided with a second bolt hole corresponding to the first bolt hole and the light hole, and is connected through a fixing bolt and a jacking bolt respectively. The middle core mold is fixed on the supporting platform, the jacking bolt is jacked into the light hole, and the left core mold and the right core mold are jacked up, so that the composite material joint workpiece formed by solidification is not damaged during demolding.

The application discloses a layered-preventing composite material joint forming die and forming method. The device part comprises a die, a composite material lining and a pressing plate. The wedge is linked with the outer die through a screw. The screw is removed after the die pressing is completed and before curing, so that the wedge can freely move during the curing process without affecting the joint and causing layered defects of the joint. Meanwhile, the wedge is always in contact with the outer die during the curing process, plays a role in heat transfer and improves the curing efficiency. The expansion coefficient of the composite material lining is the same as that of the composite material joint. During the curing process, the composite material lining will not generate force on the joint due to different deformation amounts, so as to cause layered phenomenon. Meanwhile, the composite material lining has good mechanical properties and can resist the stress of the joint caused by the deformation of the die during the curing process, so as to avoid the deformation of the die and layered phenomenon of the joint. The top block on the inner die can push out the inner die and the composite material joint during demolding, so as to realize rapid demolding.

This invention provides an intelligent design method for asymmetric composite joints of pipe jacking segments based on performance matching, comprising the following steps: acquiring geological information and structural data of the target underground pipe jacking, and solving for the target bending moment required at the joint location. M req Target bending stiffness K req Select the joint's structural form, determine the joint's structural parameters, and calculate the joint's actual bending stiffness. K joint The actual bending stiffness obtained is matched and verified with the target bending stiffness. If the conditions are met... K joint ≥ K req If the match is successful, then the joint is successfully matched; if not, adjust the joint by increasing the bolt diameter, increasing the number of reinforcing bars, or using higher-strength concrete, or by adopting other joint construction methods; repeat the above steps after adjustment and re-verify until the matching conditions are met. Using the design method of this invention, performance matching is precise, achieving both safety and economy, fundamentally optimizing joint stiffness and avoiding dilemmas.

A pre-pressing waterproof assembly type dry and wet composite joint structure at least comprises two self-waterproof prefabricated parts, a pressing piece, a waterproof material, a reinforcing rib A1, a reinforcing rib A2, a reinforcing rib B1, a post-installation reinforcing rib and a post-pouring material, the self-waterproof prefabricated parts comprise variable cross-section areas, the reinforcing ribs are arranged in the self-waterproof prefabricated parts, and the post-pouring material is compounded in the self-waterproof prefabricated parts. Therefore, the joint structure disclosed by the invention has very strong bearing performance. Meanwhile, the self-waterproof prefabricated parts have the self-waterproof effect, the pressing pieces contained in the structure can press the waterproof materials in the joints, so that the self-waterproof prefabricated parts have the excellent waterproof performance, overhanging steel bars are selected as tensioning points in the pre-pressing operation, the pressing pieces can also be used as connecting pieces of reinforcing ribs after the operation is completed, and the construction efficiency is improved. Connection joints of reinforcing ribs do not need to be additionally arranged, so that the splicing and connecting steps are reduced; and meanwhile, the post-mounted reinforcing ribs adopt a staggered post-assembly design, so that a sufficient operation space is reserved for pre-pressing of the pressing piece.

A counterbalance device for an apparatus with composite joints is provided. The apparatus includes a frame, a first movable member translatable relative to the frame in a first direction, and a second movable member rotatable relative to the first movable member about a first axis. The counterbalance device includes: a force output mechanism configured to provide an output force; a distribution mechanism connected to the force output mechanism, to allow the force output mechanism to apply the output force to the distribution mechanism; and a pulling mechanism connected to the distribution mechanism, to allow the pulling mechanism to act on the distribution mechanism. The pulling mechanism is connected to and translatable relative to the first movable member in the first direction. The pulling mechanism is further connected to the second movable member, and is translatable in the first direction with rotation of the second movable member about the first axis.

This invention discloses an active control method for stepless variable stiffness of a liquid rubber composite joint. The liquid rubber composite joint includes a mandrel and at least one pair of liquid cavities located on both sides of the mandrel. A flow channel 1 and a flow channel 2 are arranged inside the mandrel. One end of flow channel 1 communicates with liquid cavity 1 of the pair of liquid cavities, and one end of flow channel 2 communicates with liquid cavity 2 of the pair of liquid cavities. The active control method involves installing a stepless flow channel control valve device inside the mandrel at the other end of flow channel 1 and flow channel 2, connecting the other ends of flow channel 1 and flow channel 2. By controlling the cross-sectional area of ​​the connection between flow channel 1 and flow channel 2 through the stepless flow channel control valve device, the volume of liquid flowing between flow channel 1 and flow channel 2 can be precisely controlled, thereby changing the dynamic stiffness of the liquid rubber composite joint in real time. This invention enables active control of the variable stiffness of the joint. This invention also solves the problem of liquid leakage.

The invention provides a performance matching-based intelligent design method for an asymmetric combination joint of a jacking pipe joint, which comprises the following steps of: acquiring geological information of a target underground jacking pipe and structural data of the jacking pipe, and solving to obtain a target bending moment Mreq and a target flexural rigidity Kreq which need to be borne by a joint position; selecting a construction form of the joint, determining construction parameters of the joint, and calculating the actual flexural rigidity Kjoint of the joint; performing matching verification on the obtained actual flexural rigidity and the target flexural rigidity, and if Kjoint is greater than or equal to Kreq, determining that matching succeeds; if not, the diameter of the bolt is increased, the number of steel bars is increased, or a higher-strength concrete adjusting connector is selected or connectors of other structural forms are adopted; and the steps are repeated after adjustment, and verification is carried out again until matching conditions are met. By the adoption of the design method, performance matching is accurate, safety and economical efficiency are achieved at the same time, the joint rigidity is optimized fundamentally, and dilemma is avoided.

Composite joints and methods of forming composite joints are presented. A composite joint comprising: a first composite component formed of one of a thermoset material or a first thermoplastic material; a second composite component formed of a thermoset material or a third thermoplastic material; a thermoplastic joining film formed of a second thermoplastic material between the first composite component and the second composite component, the second thermoplastic material different from the thermoset material, first thermoplastic material, and third thermoplastic material; and a carbon conductive layer in the thermoplastic joining film.

An apparatus and method of creating a window in a composite casing section. The composite casing section has a metallic casing, an indexing locator and a composite joint. The composite joint is positioned between the metallic casing and indexing locator. The indexing locator is configured to locate a departure device within the wellbore. The departure device directs the milling device to mill the window through the composite joint. A lateral wellbore is created after the window is milled through the composite joint.

A golf club head having a stress reducing feature at a composite joint is disclosed herein. The stress reducing feature is preferably cylindrical with a circular groove that has a radius R_Groove that ranges between 0.005 inch and 0.050 inch. An adhesive thickness along the front of a joint t_gap_front preferably ranges between 0.002 inch and 0.060 inch.

The utility model provides a non-dismantling type steel bar truss supporting structure which comprises a bearing plate truss set and a composite joint, the composite joint comprises two split fixing blocks which are symmetrically arranged, and the upper end and the lower end of the bearing plate truss set are respectively provided with layer plates which are welded and fixed. Each bearing plate truss set comprises an upper chord rib and two lower chord ribs, two sets of folding ribs are fixed to the two sides of each upper chord rib through a plurality of fixing points respectively, the folding ribs are bent reversely at uniform intervals, the folding points on one side of each folding rib and the upper chord ribs are welded and fixed, and the outer portions of the fixing points and the split fixing blocks are in a fixed state. Folding points on the other sides of the folding ribs are respectively welded with the two lower chord ribs; according to the disassembly-free steel bar truss disclosed by the utility model, the integrated composite node externally coated with the weldment is arranged at the bending welding spot position of the disassembly-free steel bar truss, so that the exterior of the welding spot position of the truss and the connecting section form a whole, the shear resistance of the welding spot in multiple directions can be effectively improved, and the strength of the welding spot is improved.

The invention relates to the field of metal composite plate explosive welding, and provides a sample, a tool and a method for Z-direction fatigue testing of an explosive composite joint, the sample at least comprises a top layer and a tail layer, the sample at least comprises an interface, and the sample comprises a circumferential boss part formed by the upper part of the top layer; the central cylinder part is arranged below the circumferential boss part, and the central cylinder part at least comprises a lower part of a top layer and a tail layer; the conical transition part is arranged between the circumferential boss part and the central cylinder part; the upper central through hole is formed downwards from the top of the sample and extends to a position which is larger than 1mm below an interface to be tested; and the lower central through hole is communicated with the upper central through hole. According to the Z-direction fatigue test sample for the explosive composite joint, firstly, a fatigue failure surface is controlled at an interface, so that the accurate judgment of the Z-direction fatigue performance of the explosive composite joint is realized; interface fracture is not prone to being caused in the installation process; and 3, tension-tension fatigue, tension-compression fatigue and compression-compression fatigue tests can be met.

The invention discloses a composite material connection structure static strength equivalent simulation method considering assembly defects, and relates to the technical field of composite material structure simulation. Firstly, a composite material single-nail connection finite element simulation model considering actual assembly defects is established, static tensile analysis is performed, load-displacement curve characteristic parameters are extracted, and a composite material single-nail connection finite element simulation model is established; the method comprises the following steps: firstly, establishing an assembly defect-characteristic parameter representation relationship, secondly, analyzing a substructure-multi-nail structure static strength transfer relationship under the constraint of a tensile load, finally, performing static strength analysis, extracting simulation result characteristic parameters, constructing a conventional multi-nail finite element model for verification analysis, and establishing a multi-nail connection structure tensile strength prediction simulation model. The calculation complexity of the whole structure model is reduced, the consumption of calculation resources and the number of grids are reduced, the problem that local assembly defects are difficult to accurately analyze is solved, and the efficiency and accuracy of static strength analysis of the composite material connection structure are guaranteed.