35results about How to "Improve appearance pass rate" patented technology

The invention discloses a device and a method for online removing accretions on a furnace bottom roller of a heat treatment furnace. The device comprises a steel plate placed on the furnace bottom roller, wherein the steel plate is a high-strength steel plate of 70mm*3,100mm*9,000mm; a herringbone opening is formed by using numerical control flame cutting equipment to cut along the length direction of the steel plate. According to the device and the method disclosed by the invention, under the state that the shut-down is not needed, tempering and normalizing temperature states of the heat treatment furnace are effectively utilized, and the treatment time is selected in the switching process of a tempering technology and a normalizing technology, so that the influence on the production efficiency caused by the treatment on the accretions of the furnace bottom roller can be effectively reduced; indentations on the lower surface of the steel plate subjected to heat treatment due to the accretions of the furnace bottom roller can be effectively removed, and further the appearance qualified rate of steel plate products subjected to heat treatment is greatly improved; compared with a traditional method, the method disclosed by the invention has the advantages of simpleness and convenience in operation, low cost and less influence on the production efficiency; a large amount of labor and material resources are reduced; meanwhile, the quality of the steel plate is effectively improved.

The invention provides a high cold-resistant polyurethane shock-absorbing pad and a preparation method thereof. The polyurethane shock absorber is formed by mixing and crosslinking components A and B; wherein, component A is a polyol composition, including the following raw materials: caprolactone-modified polyether polyol, polyether polyol, terminal Hydroxy polybutadiene, terminal primary hydroxyl siloxane, chain extender, catalyst, foam stabilizer, foaming agent; B component is NCO blocked isocyanate prepolymer, including the following raw materials: caprolactone modified polyether Polyols, 4,4-diphenylmethane diisocyanate, side reaction inhibitors. The high cold-resistant polyurethane shock-absorbing pad prepared by the invention has good shock-absorbing performance and excellent dynamic fatigue resistance, and the low-temperature performance is significantly improved, and can be used in the construction fields of Moscow-Kazan high-speed railway and railways in cold regions such as Northern Europe and Siberia. And the field of automobile shock absorption in extremely cold regions.

The invention discloses a cooler for cooling an on-site welded joint of a long steel rail and a using method for the cooler. The cooler is characterized by comprising a walking support, a cooling fan and a cooling wind path distributing device, wherein the cooling wind path distributing device is fixed on the walking support; the cooling fan is arranged on the top of the cooling wind path distributing device; the cooling wind path distributing device has a bottomless empty tank shape; the lower part of the tank body is inwardly folded; wind path partitioning boards and a wind path switch are arranged in the tank; the wind path partitioning boards partition the tank body into a plurality of vertical spaces; and the tops of the wind path partitioning boards are moveably connected with the wind path switch. The using method comprises the following steps of: pushing the cooling wind path distributing device which is connected with an external power supply along the steel rail to a position above the on-site welded joint; turning on a switch of the cooling fan; distributing wind generated by the cooling fan to a part required to be cooled according to a certain sequence and a certain wind amount; and making the center of the cooling wind path distributing device uniformly swing within a range of 10cm around the welded joint so as to fulfill the aim of uniform cooling. The appearance of the welded joint is corrected by using a rule of thermal deformation in the cooling process, so that the appearance qualification rate of the welded joint is improved, the appearance polishing workload is reduced, and the product quality is improved.

The invention discloses a PCB shape processing method, device and readable storage medium. The method includes: step S1, detecting whether there is a circular arc or a corner in the PCB shape, and when the PCB shape has a circular arc, execute step S2, when When a corner appears in the PCB shape, execute step S3; step S2, make a milling tape file according to the PCB shape, and interrupt the arc in the milling tape file; step S3, make a drilling file, and insert Add drill holes at the corners of the . When the present invention detects whether there are circular arcs and corners in the shape, the circular arc is automatically interrupted, and drilling holes are automatically added at the corners, which can directly reduce manual intervention, reduce the probability of error, improve work efficiency, shorten the operating time of personnel, and greatly save Reduce labor costs and improve the appearance qualification rate.

The invention includes base of back projector at bottom and front faceplate fixed on the base. U shaped trough is made on the middle of upper part of the base. Characters are that a sheet metal bracket in inverse U shape for supporting front faceplate is fixed on the said U-shaped trough; upper and middle parts of the front faceplate are fixed on the sheet metal bracket. By sheet metal bracket with good rigidity being added, the disclosed structure enhances rigidity of the front faceplate at middle part. The said projector provides large quantity of anti pressing on the front faceplate, and no happening ridgy distortion so as to raise acceptability for appearance of the front faceplate, and make users more satisfaction.

The invention discloses a manufacturing method of an axial diode, comprising the following steps: 1. Wafer cutting→2. Welding and assembling→3. High-temperature welding→4. Plastic sealing and forming→5. Lead-free electroplating→6. Electrical test braiding →7. Laser printing →8. Packaging. Due to the laser printing method for printing, the original 5H cooking work before lead-free electroplating is avoided. At the same time, consumables such as ink for ink printing and printing molds are no longer required to be purchased, which can reduce product costs and improve product appearance. Improve the product appearance quality level, improve the product appearance production pass rate by more than 1%, reduce product costs, and greatly improve the product appearance quality, thereby improving product quality.

The invention relates to a preparation method for chunk neodymium iron boron. The preparation method is characterized by comprising the steps of designing multiple convex points which are distributed in a central symmetry manner on an upper pressing surface of a pressing blank during designing the pressing blank of a chunk magnet; designing concave points, corresponding to the convex points designed on the upper pressing surface of the pressing blank, on a surface, corresponding to the upper pressing surface of the pressing blank, of a die when the die is designed; installing the die, and completing powder weighing, pressing, packaging and isostatic pressing to obtain the pressing blank which can be put into a sintering furnace; and enabling the surface, having the convex points, of the pressing blank to be in contact with a sintering basin, forming an interval between the magnet and the sintering basin, and completing sintering. The preparation method has the advantages as follows: by increasing the convex points on the surface of the chunk magnet, the friction force between the magnet and the sintering basin is reduced in the sintering process, and the magnet deformation is lowered; and meanwhile, smooth degasification of the magnet in the sintering process is realized, so that carbon and hydrogen contents in the magnet are reduced, thereby improving the brittleness and magnetic property of the magnet.

The invention relates to the field of electronic component manufacturing, in particular to a grinding process and preparation method for large-scale products of multilayer ceramic capacitors. The grinding process includes the following process steps: S100, medium temperature treatment before sintering of the product: the treatment temperature is 625-725°C; S200, fine grinding on the machine after the medium temperature treatment: the grinding medium is white corundum powder, and the product and white The volume ratio of corundum powder is 1:2; its operation curve is: 4.5-5.5h at a speed of 4-8rpm, 4.5-5.5h at a speed of 14-18rpm, and 40-50h at a speed of 23-27rpm. It improves the overall quality of the product, ensures the consistency of the product, and improves the appearance qualification rate of the product; the internal micro-cracks of the product are reduced, and the loss tangent value is reduced; the surface smoothness of the product is increased, and the pressure resistance and reliability of the product are improved . Moreover, the production efficiency is improved, and a large-scale batch production of products is realized.