17results about How to "Control deformation" patented technology

This invention discloses a method for coordinated unloading-support-filling roadway protection in a longwall mining face of a steeply inclined coal seam. The method includes: arranging pre-reinforcing anchor bolts and cables at certain intervals in the transport roadway to reinforce the transport roadway in advance; pre-excavating a gap in the upper side of the transport roadway by blasting, and adding reinforcing anchor bolts and cables to the cross-section of the pre-excavated gap; arranging pressure-relief boreholes at certain intervals in the center of the coal seam roof at the pre-excavated gap, and implementing pressure-relief blasting after the support is moved; using I-beams and retractable modular roadway protection supports as the first and second layers of rock-blocking support, respectively; filling and sealing the goaf area above and on the sides of the retractable modular roadway protection supports with local filling materials; and arranging single hydraulic props for delayed support at a certain distance from the coal wall of the lagging face inside the roadway along the goaf. This method provides good support, significantly increases the speed of roadway retention in a longwall mining face of a steeply inclined coal seam, and effectively ensures safe and normal production.

The application discloses a MAX phase reinforced three-dimensional network tin-based lead-free solder and a preparation method thereof, and belongs to the technical field of lead-free solder. The MAX phase reinforced three-dimensional network tin-based lead-free solder is characterized in that the MAX phase reinforcing phase is distributed in the form of a three-dimensional continuous network skeleton at the grain boundary of a tin-based lead-free solder matrix; and the MAX phase reinforcing phase forms a continuous network penetrating through the whole tin-based lead-free solder matrix. The application also discloses an application of the MAX phase reinforced three-dimensional network tin-based lead-free solder in a high-temperature, high-load and high-frequency vibration scene. Through process innovation and performance optimization, the application aims to finally prepare a "high-strength, high-plasticity and high-temperature stability" tin-based three-dimensional network composite solder, solves the problem that a traditional tin-based single-component lead-free solder is prone to deformation and cracking due to thermal stress and mechanical load, improves the reliability of electronic packaging, and expands the application range of the tin-based lead-free solder in high-demand fields.

The application discloses a low-temperature ion nitriding method and application. The low-temperature ion nitriding method comprises the following steps: under a selected temperature condition, ion etching treatment is performed on the surface of a workpiece by adopting an arc-enhanced glow discharge process, and then plasma nitriding treatment is performed on the workpiece by adopting an arc-enhanced plasma process to obtain a nitriding workpiece; wherein, a positive and negative alternating voltage is applied to the workpiece in the arc-enhanced plasma process. The low-temperature ion nitriding method provided by the application can realize nitriding at a lower temperature, effectively improves the deformation degree of the workpiece, and is widely applicable to surface strengthening of cutters, molds and metal parts.

This invention relates to an automated machining method for circular composite material covers, belonging to the field of functional composite material machining. By identifying the fiber direction through photography and combining it with C-axis positioning at the turning center, the method achieves automated machining of composite materials according to the fiber direction. Integrating an image-based dimensional measuring instrument into the production line enables rapid online full-size inspection. By using a machine tool's internal probe to pre-determine product dimensions and automatically compensate, the method automates first-piece debugging during frequent production changes. Controlling cutting forces through process methods, and precisely controlling clamping forces with small-diameter hydraulic cylinders and gauges, effectively controls the deformation of thin-walled parts. By modifying the chip conveyor to remove large particles and fibers, using multi-stage sedimentation to remove suspended particles, and employing a belt degreaser to remove lubricating oil, the method solves the problem of ensuring the composite material coolant meets emission standards. The process is automated and cost-effective.

The utility model relates to bridge construction equipment technical field, and disclose a kind of pier column bent cap reinforcement framework piece shaping jig frame, including outer frame system, inner support system and connecting piece, the outer frame system includes first shaping frame, second shaping frame and third shaping frame, connecting piece two sides are respectively symmetrical and connect a group of outer frame system and inner support system, so that outer frame system and inner support system can be combined into a whole, the assembly and disassembly of jig frame are facilitated, construction efficiency is improved, and damage or deformation can be replaced individually in certain part, without replacing the whole jig frame, reduce construction cost.

This application relates to the technical field of furniture and proposes an easily adjustable modular desk, including a main desk body and a secondary desk body. The main desk body includes a main table frame and a main tabletop. The main table frame includes a main support frame, with main table legs on both sides. The main tabletop is mounted on the top of the main support frame, with one end serving as a connecting end. The secondary desk body includes a secondary table frame and a secondary tabletop. The secondary table frame includes a secondary support frame, with a rotating end and a supporting end at each end. The rotating end of the secondary support frame is equipped with a rotating component, which is vertically rotatably connected to the connecting end of the main tabletop. The secondary tabletop is mounted on the top of the secondary support frame, and the supporting end of the secondary support frame is equipped with secondary table legs. This application improves the usability of the desk.

The application is a construction method for replacing existing daylighting roof under normal operating conditions, comprising: installing a beam string structure high-altitude operation platform between structure columns; welding tensioning lugs and hoisting lugs on the top of the main beam; cutting an oblique opening in the middle of the main beam; making the left segment of the main beam and the right segment of the main beam produce vertical deformation to naturally form a staggered opening; when installing a new daylighting roof structure, a crane installs a new right segment of the main beam, connects a cable-stayed cable and tightens it; removing temporary cable-stayed measures, tensioning lugs, hoisting lugs, jacks and L-shaped steel plates, and installing new daylighting roof glass on the top of the new daylighting roof structure. The construction method effectively controls the internal force conversion and deformation of the daylighting roof steel beam during the removal process by setting pre-tensioning measures at the end of the steel beam and setting damping measures to delay the development of the staggered opening of the steel beam in the middle of the steel beam, and the construction process is safe and controllable, and the installation process of the new daylighting roof is opposite to the removal process.

The utility model discloses a special welding tool for an airplane external equipment shelter, which belongs to the technical field of airplane equipment repair and is characterized in that a ground platform is arranged at the bottom, a welding frame is fixed on the ground platform, an upper platform is fixed at the upper part of the welding frame to serve as a two-layer operation platform, and a ladder is arranged between the upper platform and the ground; the bottom of the ladder is supported on the ground through a footing assembly. The square cabin chassis supporting device is simple and practical in structure, compared with manual supporting in the prior art, flatness of the square cabin chassis can be guaranteed, deformation can be controlled, the size can be guaranteed, the square cabin chassis supporting device has high practicability, convenience, accuracy and safety, and meanwhile safety accidents caused by manual supporting can be reduced.

This utility model discloses a magnetically conductive oil-gathering pot, comprising a pot body with a concave oil-gathering bottom. The concave oil-gathering bottom includes a first oil-gathering area in the center of the bottom, a second oil-gathering area surrounding the first oil-gathering area, forming an obtuse angle with the first area, and a third oil-gathering area surrounding the second oil-gathering area. The third oil-gathering area is either a flat surface or an inclined surface sloping towards the center. The outer bottom surface of the pot body is coated from the inside out with a magnetically conductive powder coating, an aluminum powder coating, and a high-temperature resistant coating. This utility model features a multi-structured oil-gathering area design on the bottom, effectively controlling the deformation of the pot bottom during open flame heating and induction cooker heating. The outer bottom eliminates the need for a double-layered magnetic sheet, employing a cold-spraying process, resulting in a stable bottom that is not easily deformed and has high electromagnetic heating efficiency. Anti-slip steps are provided on the bottom of the pot to prevent the convex oil-gathering bottom from slipping and spinning on flat surfaces or on an induction cooker.

This invention discloses a multi-directional rough milling process for an automotive reducer housing and the housing itself, belonging to the field of automotive technology. The process includes: artificially aging the housing; selecting at least two areas on the edge of a preset area of ​​the main positioning datum surface of the housing to create auxiliary positioning holes; grinding an auxiliary positioning datum surface on the housing; placing the housing on a support substrate using the auxiliary positioning datum surface and auxiliary positioning holes as positioning references; using a clamping mechanism to simultaneously clamp the housing at multiple points, avoiding thin-walled areas of the housing; using a machining equipment with an A-axis rotary table, milling the main positioning datum surface in the preset area of ​​the main positioning datum surface using the auxiliary positioning datum surface as a reference, and then milling the side surface of the housing using the main positioning datum surface as a reference; after the flatness of the main positioning datum surface meets the requirements, performing low-temperature stress release treatment. This application establishes a complete process flow from pretreatment, positioning and clamping, multi-directional rough milling, dynamic control to detection and stress release.

The application proposes a turbine blade precision casting whole process inverse deformation method based on grid nodes, divides the design model into multiple prt files, simultaneously imports HyperMesh, performs Boolean operation on the mutual contact bodies, divides the grid, then imports the casting special finite element software ProCAST to perform solidification stage simulation, then performs de-constraint stage simulation through extraction mapping operation, sets Vacant to ensure the consistency of the precision casting process grid nodes, replaces the solidification stage surface grid node P L (x, y, z) with the de-constraint stage deformed grid node P C (x, y, z) into the inverse deformation formula, and obtains the optimized mold cavity data through multiple inverse deformation iterations, which can effectively control the size change amount of the turbine blade in the precision casting process. Compared with the prior art, the application has the advantages that the turbine blade solidification stage and de-constraint stage, i.e. the turbine blade precision casting process, are considered simultaneously, the direct inverse deformation of the two stages of solidification + de-constraint is realized by ensuring the consistency of the nodes, so that the turbine blade size △D i meets the design requirements △D max , and the blade qualification rate is improved.

The application relates to application of an iron porphyrin compound in preparation of a tumor metastasis inhibiting drug and belongs to the technical field of biological medicines. The iron porphyrin compound of the application inhibits tumor metastasis through a triple synergistic mechanism: first, the non-enzymatic catalysis mode is used to improve the intracellular NAD + level, the tumor cell metabolism is changed from glycolysis to oxidative phosphorylation, and the tumor cell metabolic flexibility is broken; second, keratin and intermediate filament protein overexpression is induced, the cell skeleton mechanical rigidity is enhanced, and the tumor cell deformation and migration are limited; and third, CD8 + T cells and M1 type macrophages are activated, the tissue immune surveillance is strengthened, the whole-chain metastasis process of tumor dissociation, intravasation, circulation survival, extravasation and colonization is blocked from the source, and the tumor metastasis key link is comprehensively inhibited.

This invention relates to a post-earthquake recoverable steel plate shear wall-timber frame hybrid structure and its construction method. The structure includes a steel plate shear wall, a glued laminated timber frame, timber floor slabs, a self-resetting shear damper, shear connectors, post-tensioned unbonded prestressing tendons, and anchorages. The self-resetting shear damper and shear connectors connect the steel plate shear wall and the timber floor slabs, while the post-tensioned unbonded prestressing tendons are used in the steel plate shear wall. Compared to existing technologies, this invention combines a steel plate shear wall with a glued laminated timber frame structure system. It leverages the lateral resistance of the steel plate shear wall to help the timber structure system address the seismic challenges of high-rise development, while the combination of timber and steel further enhances the environmental friendliness and sustainability of the building structure. Furthermore, the use of numerous prefabricated components, coupled with the ease of assembly and construction of the timber structure itself, significantly increases the overall construction speed.

This utility model relates to the field of battery welding technology, specifically a laser welding expansion fixture for large-section thin-walled cavity battery shells for electric bicycles. It mainly includes a worktable, a top clamping device, side clamping devices, and an expansion device. The worktable is welded from a tabletop and several square tubes. The expansion device is fixed to the center of the tabletop, the top clamping device is fixed to the four corners of the tabletop on the outside of the expansion device, and the side clamping devices are fixed to the four opposite sides of the tabletop. This utility model, through the triple synergy of internal expansion, side clamping, and top clamping, comprehensively controls structural deformation during the welding process. It also employs a staged welding process in conjunction with the fixture to achieve minimal deformation welding, effectively solving the deformation control problem in laser welding of large-section thin-walled cavity battery shells. This not only improves welding quality and production efficiency but also provides technical reference for welding similar thin-walled components, showing broad application prospects in the battery manufacturing field.

The application discloses a kind of underpass steel box girder underpinning railway low clearance open cut tunnel excavation method, belong to existing line railway construction technical field, in the preset reinforcement range of existing railway, the construction of existing railway support structure is carried out;Adjust the sleeper spacing in the preset reinforcement range of existing railway, and make steel box girder system;Carry out stratified excavation in design area, after first layer earthwork excavation is finished, construction concrete support structure in the range of first layer earthwork excavation;During lower layer earthwork excavation, support is carried out using steel structure support system;Steel structure support system is equipped with axial force servo system, and the deformation data of enclosure structure is monitored in real time;Make tunnel main structure;The application applies steel structure support system and servo system to underpass railway low clearance foundation pit, and realizes the dynamic adjustment of supporting axial force by data driving, is an active deformation control means, compared with traditional passive support, can more effectively control the deformation of foundation pit and upper railway structure.

The application belongs to the technical field of adhesive curing forming of helicopter composite components, and particularly relates to a large slenderness ratio composite component adhesive tooling suitable for curing deformation and a use method. A modular design structure form is adopted, a bottom frame is used as a main module to provide an installation platform, an upper module is designed on the installation platform, the upper module comprises a sliding table and a positioner and a clamping plate directly contacting the product, and the product is fixed on the sliding table after the positioner and the clamping plate are set. A bidirectional sliding platform is designed between the upper module and the main module to provide bidirectional sliding functions in the length direction and the width direction. When the main module is affected by temperature to generate size changes, the internal structure of the adhesive tooling can be self-adaptively adjusted to deform, and the upper module and the positioner will not slide, so that the generation of curing stress is avoided, and the deformation caused by the inconsistent thermal expansion coefficients is effectively controlled.

This utility model relates to the field of shoe upper technology, and proposes a three-dimensional mesh shoe upper to solve the strength problem of mesh shoe uppers. It includes a base fabric layer woven from warp and weft yarns, with uniformly distributed breathable holes woven into the base fabric layer. A three-dimensional mesh layer is movably disposed on the base fabric layer, with a gap between the three-dimensional mesh layer and the base fabric layer. Reinforcing pieces are provided at the toe and tongue openings of the three-dimensional mesh layer. A first reinforcing protrusion structure for increasing the three-dimensionality of the mesh and strengthening the shoe upper is provided between the inner surface of the three-dimensional mesh layer and the base fabric layer. A second reinforcing protrusion structure for increasing the three-dimensionality of the mesh and strengthening the shoe upper is provided on the outer surface of the three-dimensional mesh layer.