5results about How to "Omit process" patented technology

The invention discloses a PCB processing method for eliminating stub and a PCB, and the method comprises the steps: preparing photocurable plating-resistant ink through a target dielectric constant of the PCB, coating a core board with the plating-resistant ink, carrying out the photocuring of the plating-resistant ink to form a plating-resistant film layer, pressing the core board into a whole board, and carrying out the drilling of holes to obtain plating-resistant regions formed by the plating-resistant film layers on different layers of core boards, bottom copper is deposited on the through hole to enable the hole wall of the through hole to form a discontinuous bottom copper layer which is separated by the plating resisting areas in the axial direction, and electroplating thickening treatment is carried out on the through hole to remove the bottom copper layer between the plating resisting areas and thicken the other bottom copper layer. The plating-resistant film layer formed by the plating-resistant ink is reserved in the PCB obtained by pressing, so that the dielectric constant of the PCB can be ensured to be within an error range, film stripping treatment is not needed, and the problems of tedious process, high cost and related PCB quality caused by cleaning and film stripping in the prior art are solved.

The invention discloses laser cutting equipment for pipes, and aims to provide a pipe cutting machine with an anti-blocking discharging structure and a machining method of the pipe cutting machine with the anti-blocking discharging structure, and the pipe cutting machine with the anti-blocking discharging structure and the machining method of the pipe cutting machine with the anti-blocking discharging structure can prevent pipe fittings from being damaged in the discharging process, can guarantee orderly stacking of the pipe fittings after discharging is completed and can reduce the working intensity of workers. According to the technical scheme, a guide mechanism capable of enabling the pipe fittings to slide down along a fixed track is additionally arranged at a discharging structure, the guide mechanism can receive the pipe fittings machined from a machining table, the moving paths of the pipe fittings are limited through clamping grooves, the pipe fittings can be disengaged from the clamping grooves in a fixed direction, and therefore the pipe fittings can be separated from the clamping grooves in the fixed direction. The clamping groove for conveying the pipe fittings is of a gradually-shrinking structure, so that the pipe fittings can be accurately received and stably slide along a set path, mutual collision caused by free falling of the pipe fittings is avoided, the rate of finished products is increased, the labor intensity of operators is reduced, the production efficiency and the automation level are remarkably improved, and the production cost is reduced. The method is suitable for the technical field of pipe fitting machining.

This disclosure provides a method and apparatus for accelerating disk scanning in Windows systems, relating to the computer field. The method includes the following steps: opening a master file table, wherein the master file table includes file records; determining the data attributes of the file corresponding to each file record; based on the file records, extracting the block numbers of file blocks whose data attributes are non-resident, obtaining a block number set; based on the block number set, extracting the logical block number of each block number; based on the logical block numbers, generating a logical block number list; and reading file content based on the logical block number list to complete the disk scan. The method and system of this disclosure, during the disk scanning process, employs a method that sequentially arranges the logical block numbers in the file records of the master file table, allowing the read / write head to sequentially read disk sectors, thereby improving disk scanning speed and saving disk scanning time.

The utility model discloses a kind of battery unit and electric equipment, and battery unit includes battery shell and electrode assembly.Electrode assembly includes insulating component and metal conductor.Electricity shell is equipped with through-hole.Insulating component includes first insulating piece and second insulating piece.First insulating piece is connected to battery shell inner side, and second insulating piece is connected to battery shell outer side.Metal conductor is worn through hole, and part of metal conductor extends to battery shell inner side and is connected first insulating piece, and another part extends to battery shell outer side and is connected second insulating piece.Metal conductor of the scheme can be directly led out from battery shell to battery shell outside, can effectively reduce pole column internal resistance, improve battery performance.And, the scheme can omit rivet and its riveting process, effectively simplify processing technology, save material cost.

The present invention relates to a steel material comprising, in mass%, 0.30%≤C≤0.45%, 0.10%≤Si≤1.00%, 0.60%≤Mn≤1.20%, 0.20%≤Cr≤0.70%, 0.30%≤V≤0.47%, Ti≤0.015%, P≤0.100%, and S≤0.080%, the balance being Fe and unavoidable impurities, and having a P0 value defined by P0=P0'×V / P1, satisfying P0≥0.30, where P0'=Mn+0.49Cu+0.89Ni+0.40Cr-0.30Si, and P1=C+0.07Si+0.16Mn+0.61P+0.19Cu+0.17Ni+0.2Cr+V, in the formula, each element symbol represents the content of each element in mass%.