4results about How to "Guaranteed manufacturing accuracy" patented technology

This invention provides a core box mold for casting large motor bases, belonging to the field of casting mold technology. The core box mold is manufactured based on the five-part structure of a large motor base sand core. The core box mold includes an inner cavity air hole sand core 1# core box for manufacturing inner cavity air hole sand core 1#, an outer cavity sand core 2# core box for manufacturing outer cavity sand core 2#, an outer cavity sand core 3# core box for manufacturing outer cavity sand core 3#, an outer cavity sand core 4# core box for manufacturing outer cavity sand core 4#, and an outer cavity sand core 5# core box for manufacturing outer cavity sand core 5#. These five core boxes are independent of each other. This invention provides a corresponding core box mold comprising five parts for the new integrated sand core structure of large motor bases, solving the manufacturing problem of the new integrated sand core and creating conditions for achieving boxless casting of the base.

The utility model discloses a kind of monitor liquid crystal box overturning clamping devices monitor liquid crystal box overturning clamping devices, including clamping support, both sides of the clamping support are symmetrically equipped with sliding guide rail seat, the sliding guide rail seat is slidably installed with sliding clamping frame seat by linear sliding guide, sliding clamping frame seat is fixedly installed with sliding clamping frame;Sliding guide rail seat is also equipped with clamping drive motor, and sliding clamping frame is driven by screw nut pair of clamping drive motor;Opposite position is provided with alignment clamping frame in the sliding clamping frame, and the alignment clamping frame and sliding clamping frame constitute clamping pair, and the alignment clamping frame is installed in alignment platform. This clamping type overturning machine is stable in grabbing, and clamping is reliable. The clamping device has the characteristics of stable clamping, high overturning efficiency.

This application relates to a low-power, high-reliability Schottky chip with self-adjusting injection efficiency, belonging to the field of semiconductor processing technology, comprising: a substrate layer, wherein the substrate layer is highly doped with N. + A substrate layer for reducing the on-resistance of the chip; an epitaxial layer disposed on the substrate layer; a Schottky junction region located on the epitaxial layer; and a Speed ​​structure region containing several small P-type transistors. ++ Grid; P + The protective ring, the P + The junction protection rings are located at both ends of the Schottky junction region; N ++ A junction cutoff ring is located at the chip terminal; multilayer passivation regions are used to enhance the product's resistance to high temperature, high humidity, and radiation; front and back metal electrodes are used for electrical connections. This application employs highly doped N... + The substrate layer effectively reduces the on-resistance of the chip, thereby significantly improving the current transmission efficiency.

The application provides a steel tower segment assembling method, and relates to the technical field of bridge construction process.The steel tower segment assembling method divides the steel tower segments which need to be manufactured separately into a middle anchor chamber module, a side box chamber module and a side anchor chamber module, can be manufactured simultaneously, effectively shortens the manufacturing time of the steel tower segments manufactured separately, and effectively improves the manufacturing efficiency of the steel tower segments; meanwhile, in the assembling process, the side anchor chamber module is installed by taking the middle anchor chamber module as a reference, the side box chamber module is installed by taking the middle anchor chamber module and the side anchor chamber module as references, the preliminary assembling of the steel tower segment can be completed, the assembling precision of the steel tower segment is relatively reliable by sequentially assembling in the same direction; finally, the middle anchor chamber module, the side anchor chamber module and the side box chamber module are sequentially welded and fixed, the steel tower segment with high manufacturing precision which can meet the construction and installation precision of the whole steel tower is obtained, and the overall construction quality of the bridge and the use stability after the completion of the project are ensured.