48results about How to "Accurate coincidence" patented technology

The invention relates to a double-cross-surface laser-directional minimally-invasive cranial drill which is a positioning perforating drill for taking out intracranial hematoma and is provided with a machine body, a driving mechanism and a bit, wherein the driving mechanism is arranged in the machine body, and the bit is connected with an output shaft of the driving mechanism in a coaxial way. The machine body is provided with two cross planar light lasers of which the intersecting lines are collinear with bit axes. Preferably, one planar light laser is fixed with the machine body, and the other planar light laser is wound with the bit axes of the machine body to be in transitional fit and rotating connection. Under the guidance of a three-dimensional benchmark determined by the surface of the head part, the head surface drawing lines of the layer surface of a hematoma center in each direction are calculated out according to data on a CT (computed tomography) photo and are overlapped with head surface cross drawing lines through cross planar light emitted by the lasers so as to imitate noninvasive quick and easy positioning and perforating performed by hematoma on different panels.

The invention provides a gyroscope flexible joint thin rib center coincidence adjustment device and an adjustment method thereof. A flexible joint in a workpiece is fixed on a rotary table of a device through a lifting screw of the device. the rotary table is rotated to calibrate a center of a thin rib of an inner flexible joint to coincide with a central surface of a reference hexahedron, then the rotary table is locked by utilization of a rotary table fastening screw, an outer flexible joint sleeves the inner flexible joint, the center of the thin rib of the outer flexible joint is calibrated to coincide with the central surface of the reference hexahedron, and then the outer flexible joint is fixed by utilization of a fastening screw. In the method, the device can calibrate the centers of the thin ribs of the inner flexible joint and the outer flexible joint accurately, reading is carried out through a tool microscope, quantification of rib aligning errors can be achieved, and thin rib stressing skewing and angle positioning error problems can be solved which are possibly caused by employing of a sliding block contact component plane rib aligning method at present.

The invention relates to a multifunctional chassis fixture for a roundness measuring instrument to measure the molded lines of a piston. The multifunctional chassis fixture is provided with a lower positioning chassis and an upper rotary indexing positioning disk which are provided with an axial locking mechanism, wherein the lower positioning chassis and the upper rotary indexing positioning diskhave high roundness, and are coaxial and concentric with each other; positioning pin holes are formed in the edges of the upper disk and the lower disk; the area of a roundness measuring instrument base is increased, and a measuring diameter is increased; the lower disk and upper disk are indexed respectively through each positioning pin hole with an indexing accuracy of 55 divisions to 65 divisions, and the lower disk and upper disk perform indexed rotation; 1-degree indexing scribed lines are fabricated on the lower disk; the positioning pin holes and the roundness measuring instrument arematched with each other so as to perform indexed rotation with angle differences, are positioned through positioning pins and locked through the locking mechanism; and the long axis zero position of the piston skirt of the piston and the zero position of the roundness measuring instrument are corrected and overlapped with each other. The multifunctional chassis fixture has the advantages of convenient operation, simple production, low production cost, high detection precision, high measurement efficiency, high economical efficiency and high practicality, and can meet the universality measurement requirements of different types of pistons, and therefore, the popularization and use of the multifunctional chassis fixture can be facilitated.