7results about How to "Accurate center" patented technology

This invention relates to a grinding repair method for a central drive spline shaft, belonging to the field of repair technology. The invention proposes a grinding repair method for a central drive spline shaft. This method involves micro-grinding of the splines on a drive shaft with out-of-tolerance tooth direction but whose spline tooth thickness meets process requirements and has a significant remaining lifespan. This restores the technical condition of the spline teeth on the central drive spline shaft to its original process level, extends the lifespan guarantee capability of the drive shaft, and achieves cost reduction and efficiency improvement.

The invention provides an RO (reverse osmosis) device assembly mounting and positioning method and system based on a total station, and relates to the field of water purification. The RO device assembly mounting and positioning system based on the total station comprises a high-precision automatic tracking total station, a special optical reflection target and adapter, an integrated control terminal, a communication unit and power supply and auxiliary equipment. By ensuring natural centering of all components, residual stress generated in a pipeline, a flange and a container due to forced correction is avoided, the long-term operation risk caused by stress corrosion and fatigue cracking is fundamentally eliminated, accurate flange centering and parallelism control are achieved, it is ensured that a gasket is evenly stressed, and the service life of the gasket is prolonged. The probability of leakage in operation is greatly reduced, the intrinsic safety of the system is improved, the system converts complex space judgment into simple locating operation according to pictures, ordinary workers can complete high-precision operation under guidance, and the pressure of shortage of professional skill talents is relieved.

This invention provides a device and method for aligning the crankshaft's crank axis relative to the major axis. The bottom of the alignment block has alignment screws and alignment springs connected to both sides of a clearance groove. The alignment block is fixed to the side of the alignment rod near the bottom and facing the V-block, such that when the crankshaft is placed on the V-block and the side of the alignment rod near the alignment block is tangent to the crankshaft crank, the clearance groove of the alignment block perfectly covers the crankshaft balance block. The alignment screws and alignment springs are located on the parting surfaces on both sides of the balance block. The diameter of the reference shaft is the same as the diameter of the crankshaft crank, and the axis of the reference shaft is aligned relative to the major axis. The alignment module pre-fixes the position where the alignment rod is tangent to the crankshaft crank, and then determines the downward stroke of the alignment rod. The alignment of the crank axis relative to the major axis is achieved through the alignment rod and the alignment block, resulting in accurate and efficient alignment.

This utility model relates to the field of fabric testing technology, and in particular to a rapid tear resistance testing mechanism for rolled polyester fabric. The mechanism includes a frame on which a testing device is mounted for testing the tear resistance of the fabric. The testing device includes: a main component comprising a base plate fixed inside the frame, four circumferentially arranged grooves inside the base plate, a front slide frame slidably mounted inside the grooves, a cylindrical seat fixed in the center of the base plate, a rotating plate rotatably mounted on the lower outer wall of the cylindrical seat, connecting rods pivotally connected to the four corners of the bottom of the rotating plate, and the other end of each connecting rod pivotally connected to the bottom of the front slide frame; a driving component on the base plate for driving the rotating plate to rotate; and a clamping component mounted on the front slide frame for clamping and fixing the fabric. Synchronous radial movement achieves adaptive centering and uniform clamping of the fabric, and lever principle amplifies the clamping force, effectively preventing fabric slippage during testing and ensuring accurate and reliable test results.

This invention belongs to the field of coaxiality detection technology, specifically relating to a device and method for measuring the coaxiality of CMG shaft end units. It can simultaneously detect the displacement changes of the shaft end units to obtain the coaxiality of the shaft systems at both ends. By constructing a spatial measurement benchmark with a high-precision negative-pressure air-bearing one-dimensional platform as its core, this invention fundamentally ensures the straightness accuracy of the measurement system itself, making sub-micron level coaxiality detection possible. By employing a scheme of mounting sensors at both ends of the rotor shaft system and combining them with equal-angle trigger sampling, it successfully solves the problem that traditional cylindricity gauges cannot be directly applied due to the special structure of the CMG rotor. This achieves synchronous, accurate, and non-contact measurement of the radial runout of the shaft end units at both ends of a long shaft system, and the measurement results truly reflect the form and position errors of the shaft system in its assembled state.

This invention proposes an ultrasonic casting system for wear-resistant zinc-aluminum alloy castings, belonging to the field of alloy casting equipment. It solves the problems of unstable molten metal flow rate, difficulty in temperature control, coarse grains caused by modifier failure, and mold splashing during casting caused by manual pouring in the production of wear-resistant zinc-aluminum alloy castings. The system includes a tundish, an ultrasonic treatment system, a flow-guiding mold, and a mold positioning mechanism. The flow-guiding mold is located at the bottom of the tundish, and a heating device is located on the outside of the tundish. A push rod is located on the top cover, with its bottom inserted into the flow-guiding mold. The ultrasonic treatment system includes a transducer, an ultrasonic generator, an amplitude transformer, and a guide rod. The guide rod penetrates the top cover, with its bottom extending below the molten metal surface. The top of the guide rod is connected to the amplitude transformer, which is connected to the transducer, and the transducer is connected to the ultrasonic generator. A mold positioning mechanism is located below the flow-guiding mold. It is mainly used for casting zinc-aluminum alloy castings.

The utility model discloses a plug-in anti-falling flange, which relates to the technical field of flanges and comprises a first flange plate, a second flange plate and a plug-in anti-falling flange, the second flange plate is arranged at the bottom end of the first flange plate; the inserting assembly is arranged in the middle of the first flange plate and the second flange plate and used for achieving inserting connection of the first flange plate and the second flange plate; the fixing assembly penetrates through the first flange plate and the second flange plate and is used for achieving fixed connection of the first flange plate and the second flange plate. According to the utility model, through the arrangement of the plug-in assembly, preliminary butt joint between the flange plates can be realized, so that not only is the installation efficiency improved, but also accurate centering is facilitated, and misalignment of sealing surfaces caused by installation deviation is avoided, thereby reducing the risk of medium leakage.