32results about How to "Reduce repetitive positioning errors" patented technology

The invention discloses a numerical control processing machine tool and processing method special for a double-power unit propeller of a large ship. The machine tool comprises an upper and a lower power unit system; the upper power unit system comprises an upper base, a mobile column, a lead screw nut mechanism, a motor, a guiding rail and an A / C direct-drive double pendulum power unit; the lower power unit system comprises a lower base, a lead screw nut mechanism, a motor, a guiding rail, a B2 axle assembly and a second A / C direct-drive double pendulum power milling unit. The processing method comprises the following steps that the upper surface of the propeller is cut and processed firstly, and then the lower surface is cut and processed, the operation is repeated until all impellers are processed; alternatively, the upper surface of the propeller can be cut and processed until the upper surfaces of all impellers are processed, and then the lower surface is cut and processed until the lower surfaces of all impellers are processed; the processing of the whole propeller curved surfaces such as impeller pressure surface, impeller suction surface, and propeller hub and the like is completed in one time of assembly, so that the troubles of turning over and reassembling of the large propeller can be saved, thus processing efficiency is improved and repositioning error is reduced.

The invention discloses a bogie frame pedestal seat assembling device, which is used for positioning and assembling the bogie frame, including a tooling carcass, a pedestal seat positioning device and a positioning beam device; One, the geometric center A of the projection of the figure formed by the connection lines of a plurality of pedestal seat positioning devices on the plane where the tooling carcass is located, the geometric center B of the projection of the positioning beam device on the plane where the tooling carcass is located, and The geometric centers C of the projections of the tooling carcass on the plane where the tooling carcass is located are coincident. The pairing device of the present invention can reduce repeated positioning errors and ensure overall assembling dimensional accuracy.

The invention discloses a multi-coating turning blade, and relates to a coating turning tool for use in metal cutting machining. The multi-coating turning blade consists of a blade substrate and a coating which coats the blade substrate, wherein the blade substrate comprises a blade body of which the transverse section is square; the upper end face of the blade body is provided with a chip breaker groove; the chip breaker groove is defined by four groove edges of which the longitudinal sections are trapezoidal; the widths of the top surfaces of the groove edges are smaller than those of the bottom surfaces; the outer side faces of two adjacent groove edges are in transition connection through cambered surfaces; the inner side faces of the groove edges are inclined from the top surfaces of the groove edges to the inside of the chip breaker groove; the outer side faces of the groove edges are inclined from the top surfaces of the groove edges to the outside of the chip breaker groove; the bottom ends of the outer side faces of the groove edges are connected with the side face of the blade body; the coating is of a multilayer structure; the coating comprises a Ti connection layer, a TiN gradient transition layer, an AlZrTiN gradient transition layer and an AlZrTiN outer wear-resistant layer in sequence from the surface of the blade substrate to the outside. Good coiling and breaking effects are achieved on large-sized chips generated in a cutting process, the combination strength between the coating and the blade substrate is high, and the multi-coating turning blade is wear-resistant.

The invention provides an X-ray pulsar navigation sensor online adjusting device and method. the device comprises an X-ray pulsar navigation sensor, a collimator, an optical aligning mechanism, a charge coupling probe, a focal plane receiving screen, a two-axis rotating turntable, a sensor support and a computer. The method includes: preparing, adjusting an optical lens, mounting a preamplifier component, measuring light spots, adjusting the preamplifier component and fastening the preamplifier component. By the device and the method, adjusting accuracy, adjusting speed and adjusting yield ofthe X-ray pulsar navigation sensor can be improved, and performance of the X-ray pulsar navigation sensor can be improved; the device has the advantages of being easy to realize and high in universality, adjusting accuracy and adjusting efficiency.