6results about How to "Reduce crack defects" patented technology

The invention belongs to the technical field of electrode paste preparation, and particularly relates to an efficient and environment-friendly electrode paste production process. A composite binder and a corncob powder-lignin composite carbonized precursor are prepared, hexamethylenetetramine-melamine resin is used as a composite cross-linking agent, the rigidity and thermal stability of boron modified phenolic resin in the composite binder are enhanced through a B-O bond, a phenolic hydroxyl group of the boron modified phenolic resin and plant pitch form a hydrogen bond, and the plant pitch is subjected to heat preservation and heat preservation. A hydrogen bond-covalent bond cross-linked network is formed under the action of the cross-linking agent, so that the high-temperature structure stability is guaranteed; the corncob powder fixes lignin through a porous framework, multistage pore channels are formed after carbonization, interface gaps are filled, the lignin is pyrolyzed at a high temperature to generate a carbon nano-whisker reinforced framework, thermal stress can be dispersed, interface bonding can be enhanced, and therefore the compactness and high-temperature stability of the electrode paste are improved. In addition, the bio-based composite binder is adopted to replace traditional petroleum-based asphalt, so that the emission of harmful substances is reduced from the source, and the environmental protection benefit and the high performance of the product are both considered.

The utility model discloses a stainless steel casting forming technical field's a kind of stainless steel casting forming equipment with quick cooling function, including casting mould, the bottom of casting mould is provided with cooling support assembly, cooling support assembly includes heat insulation pedestal, the bottom of one side of heat insulation pedestal is provided with circulating conveying component, circulating conveying component includes input pump box, circulating conveying component is installed in the bottom of one side of heat insulation pedestal, the scheme is arranged cooling support assembly, wherein the quick cooling cavity in heat insulation pedestal is arranged circulating cooling pipeline, and is matched with input pump box and output pump box to form circulating conveying system, can be outside ultra-low temperature cooling medium high-efficiency circulating conveying to pipeline inside, by the contact cooperation structure of metal heat conduction plate and metal heat conduction strip, and the recessed groove design of the matching of casting mould bottom four around and metal heat conduction strip, can be ultra-low temperature evenly conducted to casting mould, optimizes casting cooling process.

This invention relates to the field of photovoltaic cable manufacturing technology, and more particularly to a solar photovoltaic cable and its manufacturing process. The process includes: processing a tin-plated cable core according to a pre-process; extruding the tin-plated cable core through an extruder with preset extrusion parameters to perform a first functional layer extrusion; pre-cooling the extruded cable; determining a second preset pulling speed for the second functional layer extrusion process based on a first excess value when the functionality is deemed unqualified, and further determining a second preset pulling speed based on a first excess value when the functionality is deemed unqualified after the pre-cooling stage; and adjusting the cooling temperature based on a second excess value when the cooling is deemed unqualified, and based on a second excess value when the cooling is deemed unqualified, after the cooling is deemed unqualified. This invention can comprehensively assess the manufacturing quality of photovoltaic cables from multiple dimensions and deeply refine it from a single dimension, and automatically feed back and adjust the parameters for manufacturing photovoltaic cables to improve the stability of the performance and the stability of the manufacturing process of photovoltaic cables.

The utility model discloses a kind of marine engineering thick plate weld rapid preheating device, marine engineering structure thick plate weld rapid preheating device is used to preheat the weld position of thick plate, marine engineering structure thick plate weld rapid preheating device includes main pipe and multiple sub-pipes, wherein, mixed gas is arranged in main pipe;Multiple sub-pipes are connected in parallel in main pipe, multiple gun heads are arranged on each sub-pipe, gun head can output mixed gas as preheating flame, the gun head on adjacent sub-pipe can output preheating flame to the both sides of weld position, for preheating weld position.The marine engineering structure thick plate weld rapid preheating device is heated by multiple gun heads double-side synchronously, solve traditional single-head bake handle temperature uneven problem, reduce weld pore and crack defect.Parallel sub-pipe design expands preheating area, shortens preheating time, applicable to 38mm above thick plate (such as 1.2-3m length thick plate);Main pipe-sub-pipe integrated design reduces gas delivery loss, improves heat energy utilization.

The invention discloses a laser welding preparation process for sealing connection of a multi-cavity aluminum profile of a high-speed rail vehicle, which comprises the following steps: preparation before welding, welding process and post-welding treatment, welding is performed through an arranged outer welding mechanism and an inner welding mechanism in the welding process, the outer welding mechanism and the inner welding mechanism both comprise welding assemblies, the outer welding mechanism further comprises an outer adjusting assembly, and the inner welding mechanism comprises an inner adjusting assembly; the inner welding mechanism further comprises an inner adjusting assembly, the welding assembly comprises a fixedly-arranged limiting barrel, a second fine adjustment barrel is slidably arranged on the inner side of the limiting barrel, a welding fixing barrel is rotatably arranged on the outer side of the second fine adjustment barrel, a rotating disc is rotatably connected to the outer side of the welding fixing barrel, and a bearing supporting plate is slidably arranged on the inner side of the rotating disc. A plurality of electromagnetic coils are arranged on the outer side of the welding end of the laser welding head in a circumferential array motion mode, 8-shaped swing of the laser welding head and a rotating magnetic field of the electromagnetic coils cooperate to conduct three-dimensional stirring on a molten pool, and therefore efficient exhaust and grain refinement are achieved, and the sealing performance and strength of a welding seam are remarkably improved.

The utility model relates to the technical field of silicon steel sheet production and processing, and discloses an automatic rotating silicon steel sheet extrusion device which comprises a base, a workbench is fixedly connected to the top wall of the base, an installation block is installed in the middle of the top wall of the workbench, and a hydraulic rod is fixedly connected to the middle of the inner bottom wall of the installation block. A bottom plate is fixedly connected to the output end of the hydraulic rod, sliding columns are fixedly connected to the four corners of the top wall of the bottom plate, square plates are slidably connected to the outer walls of the multiple sliding columns, a fixing column module is fixedly connected to the middle of the top wall of each square plate, and a plurality of fixing blocks are fixedly connected to the left side and the right side of the top wall of the bottom plate at equal intervals; and the inner wall of the fixed block is rotationally connected with a bidirectional pulley. In the utility model, the two-way pulley rotates on the fixed block to enable the other side to jack up the fixed column module again, so that the defects of deformation and cracking caused by non-uniform resistance stress of different parts in the process of separating the die from the bottom die are reduced.