7results about How to "Fix scratches" patented technology

This utility model discloses a dynamic pressure balanced three-screw pump rotor assembly and a three-screw pump, belonging to the field of screw pump technology. It includes a driving screw and two driven screws meshing on both sides of the driving screw. A first oil return channel connecting a high-pressure chamber and a low-pressure chamber is axially arranged within the driving screw. An oil return valve connected to the first oil return channel is provided on the driving screw located on the low-pressure chamber side. A second oil return channel connecting the high-pressure chamber and the low-pressure chamber is axially arranged within the driven screws. A support member is provided at the end of the driven screw located on the low-pressure chamber side. The support member includes a base plate at the end of the driven screw and a plug-in post on the upper surface of the base plate. The plug-in post is inserted into the second oil return channel. A thrust buckle is provided at the upper end of the driven screw. This utility model solves the scraping problem caused by axial movement of the driven screw, improves the reliability of the pump unit, reduces unit vibration and noise, and is suitable for three-screw pumps with high vibration and noise reduction requirements.

The utility model discloses a double -sided flat grinding jig and glass double -sided grinding equipment. The jig includes the first structural member made of first material and the second structural member made of second material, and the two combination forms the jig body, the first structural member is the outer ring structure, adopts the resin fiber press fit board material of high hardness, and the outer edge is equipped with the tooth profile structure that cooperates with grinding equipment, the second structural member is the inner ring structure, adopts the iron fluorine dragon material of lower hardness, and forms a plurality of product accommodation parts in its inside, when the lens is placed in the product accommodation part, its straight body position is contacted with the soft iron fluorine dragon material, and effectively prevents the scratch in the grinding process. The outer ring and the inner ring are detachably connected through the buckle structure, and are convenient for maintenance replacement. The case passes through the combination of soft and hard material, guarantees the structural strength of the jig, solves the lens straight body position scratch problem, and improves the product yield.

The invention discloses a fin electrode adopting a split bolt connection structure, which comprises an electrode upper part, a bolt kit and a fin electrode which are sequentially arranged from top to bottom, and the fin electrode is connected in a zero position barrel. The problem that a fin electrode of an existing electrode boiler is of an integral type and is not convenient to maintain is solved.

The invention provides a bus bar conveying device and a using method thereof.The bus bar conveying device comprises a welding mechanism, a bus bar welding strip manufacturing mechanism and two structural parts, the tops of the two structural parts are each provided with two linear sliding rails, and the welding mechanism is slidably connected with the two linear sliding rails through two sliding blocks at the bottom; the welding mechanisms are fixedly connected with a confluence welding strip manufacturing mechanism containing welding strips to be transferred, a movable transferring assembly is arranged between the welding mechanisms and the confluence welding strip manufacturing mechanism and comprises a mounting cross beam, two L-shaped mounting pieces are arranged at the bottom of the mounting cross beam, and sliding blocks are arranged at the bottoms of the two L-shaped mounting pieces. The two groups of sliding blocks are respectively connected with the two groups of linear sliding rails in a sliding manner; through the arrangement of the transfer assembly, a to-be-transferred welding strip contained on the bus bar welding strip manufacturing mechanism can be conveyed to the welding mechanism in a vacuum adsorption mode, and the problem that a traditional conveying device is prone to causing scraping and deformation of the surface of a bus bar is solved.

The utility model belongs to the technical field of plate processing, and discloses a plate offline transition roller table, which comprises a mounting rack, a plurality of first optical shafts, a plurality of second optical shafts, a plurality of rollers and a plurality of spacing cylinders, the plurality of first optical shafts are arranged side by side at intervals along the conveying direction, and the first optical shafts are rotatably mounted on the mounting rack; the multiple second optical shafts are arranged side by side at intervals in the conveying direction, the second optical shafts are rotationally installed on the installation frame, and the second optical shafts and the first optical shafts are arranged in a staggered mode; the plurality of rollers are rotationally mounted on the first optical axis and the second optical axis in sequence in the length directions of the first optical axis and the second optical axis; the spacing cylinders are arranged on the first polished shafts and the second polished shafts in a sleeving mode and located between the adjacent rolling wheels. The friction force between the plate and the transition platform can be reduced, the bottom surface of the plate is prevented from being scratched, and the production continuity and the quality of the plate are ensured.

The invention provides a silicon wafer cutting method, a silicon wafer cutting device and a silicon wafer. The silicon wafer cutting method comprises the steps that a silicon rod bonded to a bearing plate is cut into silicon wafers through a cutting wire net; the silicon wafer is moved upwards until the silicon wafer is separated from the cutting wire net, and in the process of moving the silicon wafer upwards, the cutting wire net makes contact with the bearing plate and the silicon wafer in sequence and is finally separated from the silicon wafer; and when the cutting wire net is in contact with the bearing plate and the silicon wafer, the tension on the cutting wire net is different. Therefore, in the silicon wafer cutting process, by adjusting and controlling the tension of the cutting wire net, the tension of the cutting wire net can be matched with the position where the cutting wire net is located in the process of moving the silicon wafer upwards, and the quality of the silicon wafer can be improved.

The invention belongs to the technical field of vehicle guiding, and provides a vehicle guiding method and system based on path planning, and the method comprises the steps: replacing an optimal path with a path with the second short time when a condition that the difference between the inflection point size and the vehicle turning radius is smaller than a first threshold value exists in an initial optimal path or not. The problem that inflection points cannot allow large-radius vehicles to pass in the planned path is avoided; on this basis, the difference values of all inflection point sizes and the turning radius of the vehicle and the speed of the vehicle in the initial optimal path are subjected to unified dimension and weighted summation, if the value of the weighted summation is smaller than a second threshold value, the optimal path is replaced with the path with the second short time, and otherwise, the initial optimal path is adopted as the vehicle guidance path; according to the method, the inflection point size and the vehicle speed are comprehensively considered, and on the basis of avoiding that the current path is a non-optimal path due to excessive speed reduction and guaranteeing the optimal time, the problem that the side part of the vehicle is scraped when the vehicle passes through the inflection point with the narrow size is solved in a speed reduction mode.