5 results about "Joint formation" patented technology

The application relates to a method for determining the joint stroke of a mechanical arm by using a Monte Carlo method, comprising the following steps: step 1, determining the pose constraint of the mechanical arm, wherein the pose constraint comprises the activity range and the pointing range of the end position of the mechanical arm; step 2, constructing the inverse kinematics equation of the mechanical arm according to the configuration parameters of the mechanical arm, wherein the configuration parameters comprise the included angle between the rotation axes of each adjacent joint of the mechanical arm; and step 3, taking a certain state of the mechanical arm containing different joint angle information as a Monte Carlo sample point, and calculating the joint angle information set in different Monte Carlo sample points according to the pose constraint of the mechanical arm and the inverse kinematics equation, wherein the joint angle information set comprises the stroke envelope of different joints in the mechanical arm. The application can determine the stroke envelope of the joint unit of the mechanical arm in the case that the configuration of the mechanical arm is known and a certain specified probability is determined, so as to guide the fine design of the envelope formed by the joints of the mechanical arm.

The present invention provides a joint structure and a joint formation method that facilitate the transmission of axial force between the upper and lower parts of the joint. [Solution] The joint structure comprises a wooden lower column 12, a wooden upper column 14 positioned above the lower column 12, a joint member 20 positioned between the lower column 12 and the upper column 14, with a steel material (vertical plate 26) and a filling material (concrete 40) positioned between the upper and lower plates, and a ventilation mechanism (ventilation groove 30B) formed above the filling material, which serves as a path for air to escape laterally from the space surrounded by the formwork 42 when the filling material is poured.

A grid and skin assembly for use in a composite laminate structure is described. The assembly includes a metallic grid having a plurality of intersecting ribs oriented in at least two distinct rib directions offset at a grid angle relative to one another and defining respective intersection points; and a composite laminate skin having a plurality of ply layers comprising a plurality of tapes oriented in at least two distinct tape directions offset at a ply angle relative to one another. The grid angle is at least 25 degrees, the intersection points define glueless joints of the metallic grid, and the grid is a non-aluminum-based material. A grid and method of manufacturing the grid and skin assembly is also described. The method includes a water jet cutting procedure and glueless joint formation due to differing thermal expansion characteristics of the grid and skin.

This invention discloses a laser-MIG hybrid welding process for 917 steel based on laser power optimization. The core of this method lies in achieving optimal matching between the microstructure and macroscopic shape of the weld joint by controlling the laser power within a specific range (e.g., around 1400W) when the welding current is fixed (e.g., 120A). Specifically, this method optimizes the molten pool morphology, controls the weld reinforcement and backside sag, refines the grains in the weld zone and fusion zone, forming a dense structure dominated by fine lath martensite, acicular ferrite, and bainite, and reduces carbide precipitation at grain boundaries, thereby improving the overall mechanical properties of the joint. Experimental results show that using the optimized process parameters of this invention (laser power 1400W, current 120A), the weld reinforcement (approximately 1.8mm) and weld width (approximately 3.7mm) exhibit excellent control, with a reinforcement / weld width ratio of approximately 0.49. The joint formation quality is high, making it suitable for precision welding of high-strength steel.

The present invention provides a method for manufacturing a die-cast joint using die-cast members as materials (joining members), capable of manufacturing a die-cast joint that can be bent significantly without breaking, and capable of manufacturing die-cast joints having various external and internal shapes. [Solution] A method for manufacturing a die-cast joint with excellent flexibility includes a joining member preparation step of preparing a first joining member (10) that is a die-cast member and has a first planned joining surface (12) and a second joining member (20) made of a metal material and having a second planned joining surface (22), and a die-cast joint formation step of forming a die-cast joint (1) by diffusion bonding the first joining member (10) and the second joining member (20) together by pressing them relative to each other so that pressure is applied to the first planned joining surface (12) and the second planned joining surface (22) under temperature conditions that allow the first joining member (10) and the second joining member (20) to form the die-cast joint (1).