35results about How to "Reduce the amount of rework" patented technology

The invention provides a method for producing an engine gear case. The method comprises the following steps of: adding raw materials containing iron into an intermediate frequency electric furnace, melting the raw materials containing iron into molten iron by heating, performing a reaction of the molten iron, the modulizer and alloy materials to obtain molten alloy, forming a metal-back shell mold by cast iron, and pouring the molten alloy into the metal-back shell mold; and after a long-time research by an inventor, the working temperature of products, the pouring temperature and the pouring speed of the alloy and the stay time of a casting in the casting mold are strictly controlled, and the metal-back shell mold is a breakthrough adoption for casting, so that the technical problems existing in the field that the dimensional precision is poor and the yield rate due to artificial production of the mold by using green sand for a long time are solved.

The invention relates to a method for controlling a hot-rolled side guide plate in the field of metallurgy, and is a method for controlling a hot-rolled coiling side guide plate to improve the quality of a hot-rolled coil. After the strip steel enters the side guide plate, the side guide plate switches from position control to pressure control; during the pressure control process of the side guide plate, it detects that the position of the side guide plate changes by more than △Xmm, then the side guide plate switches from pressure control to position control, if the position changes If it does not exceed △Xmm, the side guide plate is always under pressure control; after the side guide plate switches from pressure control to position control, detect the pressure feedback value of the side guide plate, if the pressure feedback value exceeds K times the pressure setting value under pressure control mode , the position of the side guide plate is opened once every 5s by 2mm until the pressure feedback value of the side guide plate is less than K times the pressure setting value in the pressure control mode; when the strip leaves the side guide plate, the side guide plate enters position control . The invention effectively solves the problems of misalignment, edge-out, and side-cut quality defects in the shape of the coil when there is swimming and sickle bending in the incoming strip steel.

The invention relates to a precision calibration method for clearance between rolls of hot-rolling vertical rolls, which mainly solves the technical problem that strip steel is deficient in quality because verticality and alignment to calibration of vertical rolls are not considered in current methods. The technical scheme is that the calibration method for clearance between rolls of hot-rolling vertical rolls comprises the steps of: 1, finding a rolling center line and marking; 2, the distance from the marker line to the rolling center line = the distance from the rolling center line to the roller center line (as |ZB|) + the distance from the roller center line to the marker line; 3, hitting apertures on both sides of the vertical rolls to marked positions, wherein a roll block is inside a marking line and aligned with the marking line; 4, measuring the distance from the lower ends on both sides of the vertical rolls to the rolling center line, and marking the measuring point as a point A, the radius of the rolls as R / 2 and the distances from A to a vertical roll operating side and from A to a transmission side as |OA| and |DA|; 5, comparing the measured value |OA|+R / 2 on the operating side with |ZB|, wherein if the difference is in a precision range, the verticality is good, and if the difference is not in the precision range, the clearance between rolls on the operating side is adjusted so that the difference is in the precision control range; 6, adjusting the clearance between rolls on the transmission side by the adjusting method in the step 5; and 7, measuring the total aperture of the vertical rolls, inputting the measured values and calibrating the clearance between rolls of vertical rolls after adjusting the verticality and alignment.

The invention relates to a two-time positioning construction process for pre-buried channels of an overhead line system of a high-speed railway tunnel. By adjusting the procedure of installing the pre-buried channels, a larger operation space is provided for construction, and operators can conveniently and rapidly install channel sets on a lining trolley and can rapidly install C type channel sets, D type channel sets and E type channel sets by standing on edges of the lining trolley by means of frames such as ladders. The channels can be positioned in advance while secondary lining reinforcing steel bars are bound, time is used while the space is used sufficiently, multiple steps are executed at the same time and do not affect one another, and the result is gained with half effort.

The invention provides a glass substrate coating device comprising a coating mechanism, a coating stage and a particle removal mechanism. The coating stage is used for carrying a glass substrate to carry out coating via the coating mechanism, the particle removal mechanism is arranged at one end of the coating stage away from the coating mechanism, and the particle removal mechanism removes particles when the particles on the glass substrate are found, personnel enters a machine less frequently, and more particles are avoided being brought in; in the mass production, it is possible to the quantity of glass substrates to be repaired and increase capacity.