10results about How to "Uniform contact surface" patented technology

The utility model discloses a high-stability polycrystalline silicon processing graphite clamping device which comprises a base, a clamping cap and a plurality of clamping petals, an electrode slot is formed in the bottom of the base, and a plurality of radial limiting blocks are arranged at the top end of the base; the clamping cap comprises a top plate and a circumferential plate, the top plate is provided with a top through hole, the clamping petal comprises a bottom block and a clamping block, and the bottom block is provided with a limiting sliding groove matched with the limiting block. According to the graphite clamping device, the number of the clamping petals is larger, so that the contact surface of the silicon core surrounded by the multiple clamping petals and the silicon core is more uniform, the clamping effect on the silicon core is better, and due to limiting of the limiting blocks, the silicon core is more uniform and stable in clamping force. The inverted-frustum-shaped surfaces at the top ends of the clamping petals are spliced into a complete inverted-frustum-shaped groove, so that silicon can be deposited in the inverted-frustum-shaped groove during deposition, and the bottom end of a silicon rod is more stably connected with the clamping device during growth of the silicon rod.

The invention belongs to the technical field of iron tower welding, and discloses an iron tower steel structure welding fixing tool which comprises a workbench, when a bearing frame plate vertically ascends and descends, the distance between the bearing frame plate and a square strip can be close or away, and generated extrusion force and traction force are generated; a rotating plate drives a sliding block to slide back and forth on the inner wall of a sliding hole formed in the top of a bearing frame plate, the sliding block drives an L-shaped rod and a positioning shell to move back and forth, the positioning shell drives a positioning roller to move back and forth, the positioning roller can extrude the side faces of the steel plates in the moving process, and therefore the angle between the two steel plates is adjusted and controlled; and it is ensured that the steel plate can be located at the correct relative angle in the welding or assembling process. The precise angle regulation and control are of great importance for ensuring the stability of structural parts, reducing errors and improving the assembly precision. And the production line can process various welding tasks of different types more flexibly, the types of welding items are expanded, and the diversity of products is improved.

This invention provides a welding processing device and method for inner and outer meshes of a filter, including a processing table, a lifting mechanism, a moving mechanism, a roller electrode, a shaft electrode, and a clamping mechanism. It simplifies the complex spatial helical motion into a single axial movement of the roller electrode within the joint channel. It eliminates the need for expensive and complex high-precision multi-axis CNC systems; only a common motor is needed to drive the roller electrode to move linearly along the joint channel, completing the oblique seam welding of the filter's metal mesh. The workpiece can be rotated purely mechanically, resulting in low cost and high welding efficiency. Furthermore, a micro-forging process is used to pre-form a solid metal strip with a width of approximately 1-2 mm and no through holes. This solid strip provides a continuous and uniform contact surface for the subsequent roller electrode, thereby providing constant resistance and an ideal current path. This allows for controllable and predictable generation of welding heat, significantly reducing the occurrence of incomplete welds and overheating caused by mesh holes.

This utility model relates to the field of landscape engineering construction, specifically a lawn compaction mold for ecological grassed ditch construction. By incorporating rollers and a pull rod traction component, when the construction worker pulls the pull rod traction component, the rollers roll along with it. The rollers have an arc-shaped cross-section, perfectly conforming to the curve of the grassed ditch. This ensures uniform contact between the rollers and the lawn and soil during compaction, and the rollers apply uniform pressure to the lawn during movement. This avoids the localized loosening or over-compaction caused by uneven force during manual compaction. It effectively solves the problem that in the lawn laying and compaction stage, construction workers often use shovels to compact the lawn to ensure close contact between the lawn roots and the soil. However, because grassed ditches typically have an arc-shaped structure, manual compaction is difficult to completely conform to the curve of the ditch, resulting in poor molding effects and the grassed ditch being prone to unevenness or localized loosening.

The application relates to the technical field of microspheres, and particularly provides a preparation method of carboxylated porous microspheres, which comprises the following steps: adding a biocompatible polymer, an acrylic copolymer and an oil-soluble emulsifier into an organic solvent to be dissolved and prepared into a dispersed phase; adding a water-soluble emulsifier and / or a protective colloid into water to be prepared into a continuous phase; mixing the dispersed phase and the continuous phase to obtain an emulsion, continuously stirring until precipitation appears, collecting the precipitation, cleaning, drying and obtaining the carboxylated porous microspheres. In the continuous stirring stage, air blowing or a crosslinking agent can be added. The carboxylated porous microspheres have good fluidity and good nucleic acid extraction and purification effects.

The invention discloses a casting device for manufacturing automobile aluminum alloy wheel hubs. The invention relates to the technical field of wheel hub casting devices, comprising a lower mold, the outer wall of the lower mold is fixedly connected with a fixing ring, the fixing ring is annularly arranged on the outer side of the lower mold, the upper side of the fixing ring is fixedly connected with four hydraulic presses, the four hydraulic presses are respectively arranged at the front, rear, left and right sides of the lower mold, and the output ends of the four hydraulic presses are all facing the middle upper side of the lower mold, the output end of the hydraulic press is fixedly connected with a connecting plate, the side of the connecting plate away from the hydraulic press is slidably connected with a side mold, the four side molds can form an annular structure, and after the four side molds form the annular structure, the invention is provided with side molds, upper molds, lower molds and other structures, so that a wheel hub molding chamber can be formed inside, and then the wheel hub can be molded after casting aluminum water, which has the characteristics of strong practicality and can reduce surface molding defects during wheel hub casting.

The utility model discloses a low-stress laser crystal clamping structure which comprises a crystal seat and a crystal cover used for heat dissipation of a laser crystal, gaps are formed among the laser crystal, the crystal seat and the crystal cover, and in an assembly state, the gaps are filled with metal connecting parts used for connecting the laser crystal, the crystal seat and the crystal cover. And the metal connecting part is formed by welding and positioning the crystal cover, the crystal seat and the laser crystal after molten liquid metal enters gaps among the accommodating groove, the assembling groove and the laser crystal from the liquid storage groove through the flow guide hole. According to the scheme, the crystal cover, the crystal seat and the laser crystal are subjected to hot melting welding through the metal connecting part, extra stress is not added to the crystal, and gaps among the laser crystal, the crystal seat and the crystal cover are fully and uniformly filled by utilizing the fluidity of molten metal, so that the contact surfaces among the laser crystal, the crystal seat and the crystal cover are more uniform and free of air holes; and the whole structure has a better heat dissipation effect.

The invention provides a crucible and a preparation method thereof, and relates to the technical field of silicon rod preparation, the method comprises the following steps: providing a crucible base body of a first type material, and performing surface treatment on the inner wall surface of the crucible base body to obtain a to-be-bonded area; providing an initial coating raw material of a second type material, wherein the phase of the initial coating raw material comprises solid particles; performing homogenization treatment on the initial coating raw material to obtain a target coating raw material; the average particle size of the target coating raw material is smaller than that of the initial coating raw material; the target coating raw materials are fused through the fusion spraying technology, and the to-be-combined area is coated with the fused target coating raw materials; and cooling the target coating raw material to form the compact crucible coating which is in a metallurgical bonding state with the to-be-bonded area. The compact coating of the crucible has good high temperature resistance and stability, and effectively avoids stripping or falling at high temperature, so that the stability of the compact coating is favorably maintained, and the durability and the stability of the crucible are further improved.

The application discloses an environment-friendly flue conversion device with a heat energy recycling function and a method thereof, and belongs to the technical field of fine chemical engineering equipment. In order to solve the problem of heat energy loss caused by incomplete flue gas heat exchange treatment, heat exchange fins are arranged in the heat exchange channel, the heat exchange fins are arranged in a radial array, and the heat exchange fins are internally provided with serpentine pipes. The arrangement of the serpentine pipes and the heat exchange fins enables the main pipeline to have good wear resistance in flue gas, the radial array arrangement is uniform and consistent with the flue gas contact surface, uneven flue gas flow in the cross section is avoided, the full contact of high-temperature flue gas and the first heat exchange assembly is improved, the heat exchange efficiency is improved, the cooling water is used to perform second-stage heat exchange and dust and sulfur removal on the flue gas through the spray head, the cooling water is filtered through the filter screen after the second-stage heat exchange and is discharged, the residual heat in the flue gas is recycled through the second-stage heat exchange while the flue gas is effectively dust and sulfur removed, the heat exchange efficiency of the flue gas is improved, and the heat energy is fully utilized.

The invention discloses a lifting type rotating stand jig, and belongs to the technical field of glass production auxiliary jigs. Comprising a first clamping part and a second clamping part, the first clamping part comprises a first support, a cross rod and a first clamping plate, the second clamping part comprises a second support, a clamping rod and a second clamping plate, the first support is fixed to one end of the cross rod, the second support is installed at the other end of the cross rod in a hinged mode, and the clamping rod is fixed to the first clamping plate. The clamping rod is fixed on the second support, the first clamping plate is arranged at the bottom of the first support, the second clamping plate is arranged at the bottom of the second support, limiting teeth which are distributed oppositely are arranged on the first clamping plate and the second clamping plate, and glass is clamped and fixed between the limiting teeth. The operation steps in the glass lifting and transferring process are simplified, and the glass transferring efficiency is improved.