4results about How to "Guaranteed positional relationship" patented technology

This invention discloses a welding positioning device and its forming method for training missiles. The welding positioning device includes: a missile body welding fixture, a pouring fixture, a tail fin welding fixture, and two centers. Each of the two centers consists of a frustum and a round rod coaxially fixed to the large-diameter end of the frustum. The two centers are respectively used to hold the inner hole of the missile body's central tube and the positioning sleeve. The missile body welding fixture is used to weld and position the missile head and cylindrical section, and the missile head and mounting sleeve. The pouring fixture is used for pouring and forming concrete inside the conical section of the missile body. The tail fin welding fixture is used to weld and position the tail fin and the conical section, and to ensure the relative angle between the tail fin blades and the positional relationship between the blades and the missile body axis. This invention can ensure the welding quality and welding accuracy of the training missile, thereby ensuring coaxiality, symmetry, and straightness.

The utility model relates to an arc line expansion joint, including two edge beams, a plurality of anchor plates and a sealing strip, a plurality of anchor plates set up respectively in the outside of two edge beams, the edge beam includes the side plate with the top plate, the front and back of side plate all are provided with the clamping slot, the surface of top plate is equipped with the metal sheet, the surface of metal sheet is equipped with the convex, the top plate is located the top of side plate and has reserved the sealant installation groove between, through the edge beam design is the side plate with the top plate, and the top plate is handled with the side plate between using the metal sheet and the convex realization clamping and connects, makes its side plate and top plate form sealant installation groove between, to be more favorable to the staff between sealing strip and this edge beam carries out the installation operation, does not need to utilize external auxiliary tool to complete the installation dismounting operation when installation operation, makes the installation dismounting operation between this expansion joint and sealing strip more simple and convenient, saves time and labour, and the whole practicality is stronger.

This invention provides an in-situ measurement and analysis method for the wear characteristics of a small-diameter ball-end grinding wheel for hemispherical harmonic oscillators, based on a spectral confocal sensor. It relates to the field of ultra-precision grinding and polishing technology, addressing the problem that existing in-situ detection methods cannot eliminate system installation errors, and that sensor-acquired signal data cannot accurately characterize the true wear condition of the grinding wheel. This invention uses a spectral confocal sensor to collect relative distance data of a standard sphere, utilizing the constraint conditions of the measurement coordinate points satisfying the ideal standard spherical surface equation. Simultaneously, based on multibody theory, it establishes the kinematic chain transmission relationship of the machine tool measurement system, constructs an error transmission model of the machine tool, and solves for assembly error values. The assembly error results are then used to compensate for the grinding wheel coordinate measurement results to obtain the calibrated grinding wheel coordinates, which are further fitted to the morphology of the small-diameter ball-end grinding wheel, thus achieving in-situ measurement and analysis of the grinding wheel wear characteristics.

The utility model discloses a kind of battery mechanism of cycling equipment, driving mechanism and cycling equipment, it is related to battery technology field.The battery mechanism of cycling equipment, including battery assembly and control assembly, battery assembly includes first shell and the electric core being arranged in the inside of first shell, control assembly includes second shell and the first circuit board and second circuit board being stacked along axial direction in the inside of second shell, communication module is equipped on the first circuit board, MOS module is equipped on the second circuit board.The first shell is detachably connected along axial direction with the second shell, the control upper shell of plastic article and the control lower shell of metal article are included in the second shell along axial direction, control upper shell connects battery lower shell, communication module on the first circuit board is arranged in the inside of control upper shell, MOS module on the second circuit board is arranged in the inside of control lower shell.The battery mechanism of the utility model can improve the integrated degree of internal device.