22results about How to "Avoid thermal expansion" patented technology

The invention provides a diamond and negative expansion particle reinforced aluminum matrix composite and a preparation method, and belongs to the technical field of composites. The aluminum-based composite material is composed of a diamond phase and a negative thermal expansion phase which are dispersed in an aluminum matrix. The average particle size of the diamond phase is 10-1000 [mu] m, and the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20; the particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than that of the negative thermal expansion particles away from the diamond phase. The diamond and negative expansion particle reinforced aluminum-based composite material with excellent thermophysical performance is obtained by regulating and controlling the volume fraction of the diamond and the negative expansion particles, the thermal expansion coefficient matched with a semiconductor material is prepared through a collaborative optimization strategy, and the diamond and negative expansion particle reinforced aluminum-based composite material is applied to the field of electronic packaging heat dissipation materials.

The utility model discloses a packaging bottle and a bottle cap assembly, the bottle cap assembly comprises a bottom cap inner mouth, a bottom cap outer mouth and a bottom cap inner mouth, the bottom cap inner mouth comprises a cylinder body sleeved on a bottle opening and a heat insulation part arranged on the peripheral wall of the cylinder body, and the cylinder body is provided with external threads; the top cover is provided with an internal thread matched with the external thread and covers one end of the cylinder body; wherein the cylinder body is connected with the heat insulation part in a non-detachable manner. The utility model aims to solve the technical problem that an existing bottle cap is easily pulled out of a bottle opening after being heated.

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

The utility model relates to the technical field of resistors, in particular to an electronic equipment resistor suitable for a wide temperature range. The resistor comprises a resistor body, supporting assemblies are movably connected to the positions, close to the two ends, of the bottom of the resistor body, and protection assemblies are arranged between the outer wall of the resistor body and the two supporting assemblies. Through collaborative design of the protection assembly and the supporting assembly, the reliability problem of a traditional winding resistor in a wide-temperature and vibration environment is solved. The protection assembly adopts an alloy spiral ring to wind a resistor body, a gap is reserved to buffer thermal expansion and cold contraction, and material oxidation and resistance drift are inhibited; the spiral structure and the gap form an elastic buffer space, vibration energy is absorbed, and welding spot stress concentration is avoided. The supporting assembly is movably connected with the bottom of the body through an L-shaped honeycomb supporting plate, disperses vibration stress, adapts to size changes and is in flexible connection with the end in cooperation with fine adjustment of screws, and structural stability is guaranteed.

The application relates to the technical field of numerical control machining, and discloses a metal part cutting machining method and system based on path planning, which comprises the following steps: fusing and calculating the cutting removal amount requirement and the surface geometric characteristics of a metal part, laying nodes on the metal part according to a density field obtained through calculation; constructing a topological connection scheme, analyzing the thermal cumulative effect of the topological connection scheme, selecting a target topological connection scheme, and outputting an initial tool path trajectory; planning the initial tool path trajectory by taking a residual stress direction field as a conditional constraint, adjusting the direction of the initial tool path trajectory according to a feeding direction; judging the feasibility of the tool path trajectory after direction optimization, correcting the tool path trajectory according to a judgment result, and outputting a final planning path. The application can realize the collaborative optimization of machining efficiency and machining precision, and effectively suppresses the machining deformation caused by cutting thermal accumulation and residual stress.

The utility model discloses a quenching device for hot stamping automobile parts, and relates to the technical field of automobile part processing, the quenching device comprises a cooling mechanism, the cooling mechanism comprises a processing box, the inner wall of the processing box is fixedly connected with the outer side of a placing bushing, slope plates are arranged on both sides of the bottom of the placing bushing, and the processing box is fixedly connected with the processing box; two sliding rails are arranged at the bottom of the processing box, sliding grooves are formed in the two sides, close to the slope plate, of the inner wall of the processing box, a water tank is arranged on one side of the exterior of the processing box, and a water pump is arranged at the top of the water tank. Water in the water tank is pumped into the water pipe by starting the water pump, and is sprayed out through the spraying head, so that quenched parts can be cooled at the first time, and thermal expansion of materials of the automobile parts caused by high temperature is avoided; and in addition, water vapor and heat generated when the parts are cooled can be dissipated to the outside through the heat dissipation fan and the heat dissipation net, and the water vapor is prevented from being accumulated in the machining box.

An impact tool is provided. A movable support body at least partially supports a final output shaft and a drive mechanism, and is integrally movable in an axial direction of a drive axis with respect to a housing. A force applying member applies a force to a front side of the movable support body in the axial direction. A first guide shaft is configured to extend in the axial direction to slidably guide the movable support body to move in the axial direction. At least one intermediate shaft is configured to rotate in conjunction with rotation of a motor shaft to transmit power of the motor to the drive mechanism. At least one bearing supports an end portion of the front side in the axial direction of the first intermediate shaft. A single metal support body is configured not to move with respect to the housing and to support the at least one bearing. In addition, the single metal support body has a first hole in which the first guide shaft is partially inserted. Accordingly, high power and low vibration can be simultaneously achieved.

The invention relates to a laminated film, a battery cell, and a battery module. The laminated film is provided with a housing part for housing the electrode body, and is sealed in a state in which the electrode body is housed. The housing section has a side wall section facing the peripheral end surface of the electrode body, and at least a portion of the side wall section is provided with a concavo-convex portion.

The invention discloses a chamfering device and a chamfering method for intelligently manufacturing a compressor cylinder block, and relates to the technical field of chamfering equipment. The device comprises two device bodies, a fixing table is fixedly installed between the sides, close to each other, in the two device bodies, a storage table is fixedly installed on the front face of the fixing table, a driving mechanism is arranged between the sides, close to each other, in the back ends of the two device bodies, and a machining mechanism is arranged on the outer wall of the driving mechanism in a penetrating mode; an electric threaded rod is rotationally mounted in one end of the front face of the machining mechanism, and a sliding plate penetrates through and is movably mounted on the outer wall of the electric threaded rod. The air dryer is prevented from being eroded by external dirt during standing, the dirt is blown to the chamfering head or the surface of a workpiece during working of the air dryer, scraping is further caused, the chamfering precision is reduced, continuous blowing is achieved during machining, and the situation that workpiece flying wires are attached to the surface of the chamfering head due to high chamfering temperature is effectively avoided.

The utility model relates to a kind of vertically shore power box up-down movement operation bearing device, including guide frame and mobile power receiving platform;The guide frame is set in the side of approach pier and supports mobile power receiving platform along vertical direction, the mobile power receiving platform side is provided with operation member, the slider assembly is equipped on the operation member, double track is equipped on the guide frame, the slider assembly slides along the double track, the slider assembly includes two Y direction slider and an X direction slider, the Y direction slider is installed in the both sides of track and is used to limit vertical direction movement, the X direction slider is arranged in platform bottom and is used to limit horizontal direction displacement.The utility model can effectively adapt to different water level change, realize the stable butt joint of ship and shore power facility, ensure that power supply process is safe and reliable, improve the reliability and security of port shore power facility.

The polishing machine for valve machining comprises a device body, the back face of the device body is fixedly connected with a liquid storage box, the input end of the liquid storage box is fixedly communicated with a liquid conveying pipe, the end, away from the liquid storage box, of the liquid conveying pipe is fixedly communicated with a drainage pump, and the input end of the drainage pump is fixedly communicated with the back face of the device body. According to the device, the arranged liquid storage tank is matched with the drainage pump, cooling liquid is sprayed above the valve through a spray head by utilizing a liquid conveying pipe, the valve can be cooled, the valve material thermal expansion and deformation caused by high temperature generated during polishing can be effectively avoided, meanwhile, the polishing effect can be improved, and the valve material and surface quality can be protected; and after being filtered, the generated cooling mixed liquid is guided into the liquid storage tank by utilizing the drainage pump to be reused, and the cooling liquid is recycled, so that the use amount of the cooling liquid can be reduced, the use cost of the cooling liquid is saved, and meanwhile, the treatment and discharge of the waste cooling liquid are reduced.

The invention relates to the technical field of pigment preparation, discloses an anti-fading plastic pigment which comprises the following components in percentage by weight: 70-90% of tungstate or titanate, 3-10% of rare earth doped ions and 2-8% of transition metal doped ions, and further discloses a preparation method of the anti-fading plastic pigment. Comprising the following steps: S1, preparing a precursor solution: dissolving tungstate or titanate in deionized water, adding a citric acid chelating agent, stirring for 50-60 minutes to form a basic solution, and slowly adding a rare earth doped ion and transition metal doped ion solution; through synergistic doping of rare earth and transition metal ions, doped ions form a stable solid solution structure in barium titanate or tungstate crystal lattices, meanwhile, an optimized high-temperature roasting process and atmosphere control are combined, the thermal stability of the pigment is effectively improved, and ultraviolet absorption and oxidation resistance are enhanced through introduction of the rare earth ions.

This utility model relates to the field of battery electrode sheets and discloses a self-calibration and positioning device for battery rolling rollers. It includes a positioning platform with a hollow side wall and a lifting frame embedded within it. A top plate is horizontally fixed to the top of the lifting frame. A straight rod is fixedly connected to the top of the positioning platform, and a cylinder is fixedly connected to the middle of the straight rod. A retainer is fixedly connected between the top of the cylinder and the top plate. Slider blocks are sleeved on both sides of the straight rod, and a tripod is hinged to the top of each slider. A connecting seat is hinged to the top of the tripod, and the top of the connecting seat is fixed to the bottom of the top plate. Bearing seats are fixedly connected to the bottom of both sides. This self-calibration and positioning device for battery rolling rollers, by incorporating the lifting frame, achieves stable and adjustable lifting and real-time self-calibration positioning of the upper rolling roller relative to the lower rolling roller, eliminating the need for manual disassembly and assembly. This improves electrode sheet thickness control and solves the problem that traditional drilling positioning structures cannot dynamically adjust the rollers.

The invention discloses an energy-saving and heat-insulating coating for an industrial kiln, and particularly relates to the technical field of heat-insulating coatings. The ceramic powder is prepared from the following raw materials in parts by weight: 10 to 30 parts of spinel-silicate multiphase composite system infrared radiation ceramic powder, 30 to 70 parts of active ingredients in composite silicate multifunctional powder, 5 to 10 parts of bentonite, 3 to 8 parts of asbestos wool, 5 to 10 parts of ceramic fiber, 15 to 30 parts of water, 0.5 to 2 parts of polyacrylamide, 5 to 10 parts of binding agent, 1 to 5 parts of glass powder and 0.5 to 3 parts of rare earth oxide. The preparation method comprises the steps of raw material preparation, mixed powder preparation, slurry preparation, mixed liquid preparation, coating slurry preparation, grinding and the like. The energy-saving and heat-insulating coating can effectively solve the problems of high heat conductivity coefficient, insufficient bonding strength, poor high-temperature stability and the like of the existing coating, improves the energy-saving effect of the industrial kiln, prolongs the service life of the industrial kiln, reduces the energy consumption and the production cost, has good environmental protection property and safety, and has wide application prospects in the field of energy conservation and heat insulation of the industrial kiln.

The invention provides a metal product grinding machining device based on multidirectional numerical control, and relates to the field of metal component grinding equipment. The metal product grinding device based on multi-directional numerical control comprises component clamping equipment, stress releasing equipment and multi-directional grinding equipment, the multi-directional grinding equipment comprises a coarse grinding assembly and a fine grinding assembly which are used for sequentially grinding the surface of a metal component, and the coarse grinding assembly and the fine grinding assembly are each provided with an XY-axis assembly; and the distance adjustment and the front-back dislocation adjustment between the coarse grinding assembly and the fine grinding assembly are achieved. According to the metal product grinding machining device based on multidirectional numerical control, when a metal component is ground, rough grinding and accurate grinding are conducted at the same time, the interior of the metal component is heated through the first flame tube before grinding, temperature balance is achieved between a repair area and the position around the repair area, internal stress is released in the machining process, and the metal component is ground; therefore, the metal deformation after grinding is small, and the possibility of burning is greatly reduced.

The present invention discloses a splicing mechanism and a photovoltaic curtain wall for fixing photovoltaic modules, which relate to the technical field of photovoltaic modules, including a plurality of photovoltaic panels, and also including a gap control splicing mechanism for connecting the photovoltaic panels, and an automatic adjustment mechanism for controlling the movement of the gap control splicing mechanism according to the temperature change between the photovoltaic panels. In the initial installation state, there is no restriction on the gap between the photovoltaic panels. Therefore, when installing adjacent photovoltaic panels, the probability of edge touching during the splicing process is greatly reduced due to the large installation gap left. When the installation is completed, the gap between the photovoltaic panels will be automatically adjusted. The gap of the photovoltaic panels can be automatically adjusted through the assembly. First, it can avoid the photovoltaic panels from being affected by the temperature and causing thermal expansion, which causes the edges to conflict with each other. Secondly, when the gap is increased, it can promote gas circulation, thereby improving the heat dissipation of the photovoltaic panels.

The invention provides a vehicle drive device. Provided is a technique for suppressing deterioration of noise transmitted from a rotating electric machine to a housing. A vehicle drive device disclosed in the present specification is provided with: a rotating electrical machine having a hollow output shaft; a housing that accommodates the rotating electrical machine; an intermediate shaft extending in the axial direction of the rotating electric machine in the through hole of the output shaft and transmitting the torque of the rotating electric machine to wheels of a vehicle; and a bearing having an outer ring fixed to the housing and an inner ring fixed to the output shaft and supporting the output shaft so as to be rotatable with respect to the housing, the intermediate shaft having a first flow path for supplying a refrigerant to the rotating electrical machine, the housing having a second flow path for supplying the refrigerant to the first flow path, and the intermediate shaft having a second flow path for supplying the refrigerant to the second flow path. A part of the second flow path extends in the circumferential direction of the outer ring in the vicinity of the outer ring fixed to the housing.

The application relates to a deviation correction detection device and an oven equipment. The device comprises a detection unit arranged on at least one side of a substrate running path, which is used for detecting the deviation of the substrate edge. The detection unit comprises a photoelectric detection assembly and a reflection assembly, and a detection light path is formed between the photoelectric detection assembly and the reflection assembly. An execution unit comprises a position adjustment mechanism, which is in contact with the substrate and is used for driving the lateral movement of the substrate. A control unit is used for controlling the lateral movement of the position adjustment mechanism to correct the deviation of the substrate according to the deviation signal detected by the detection unit. The reflection assembly and the position adjustment mechanism are arranged in a first temperature region, the photoelectric detection assembly and the control unit are arranged in a second temperature region, and the temperature of the first temperature region is higher than that of the second temperature region. The scheme provided by the application can improve the deviation correction control precision of the substrate in a high-temperature environment, thereby improving the tension uniformity of the substrate in the coating and baking process.

This invention relates to the field of oil suction pipe welding technology, and discloses an intelligent welding device and method for oil suction pipes of tunneling machines. The device includes a welding table and a mounting frame fixedly connected to the top of the welding table, and also includes a placement groove on the top of the welding table. Two welding heads are provided on the surface of the mounting frame. A rotating disk is rotatably connected inside the welding table, and an alignment component is located on top of the rotating disk. Through the use of the alignment component, an air source enters the interior of the first fixed disk through an air inlet pipe, causing the fixed plate to rise via a first screw, and the second support disk enters the interior of the bend. When the rising screw does not rise, an air source enters the interior of the second fixed disk through a first connecting pipe, causing the fixed plate to rotate the rotating rod and rotating cylinder. The rotating gear drives the extrusion tooth plate to move via a rotating gear ring, causing the arc-shaped plate to support the bend and straight pipe, thereby achieving anti-eccentric alignment.

The invention discloses a preparation process of hot strip aluminum with a stable hot melting point and heating and drying equipment, and relates to the technical field of drying. According to the hot strip aluminum heating and drying equipment with the stable hot melting point, through the design of a composite mechanism, an aluminum material is placed on the surface of the conveying belt, the motor drives the roller shafts to rotate so as to drive the conveying belt to convey the material, and therefore the automatic feeding and discharging effects are achieved; in the process that the conveying belt moves materials, the friction effect on the materials is improved through the grooves, the situation that the materials are clamped in the equipment and cannot be conveyed out due to insufficient friction in the material conveying process is avoided, and therefore normal operation of the equipment is guaranteed, when the materials pass through the interior of the composite shell, the materials are heated through the heater, water on the surfaces of the materials is removed, and the material conveying efficiency is improved. Water is evaporated and ascends to enter the composite shell after being heated by the heater, ventilation is performed through the processing mechanism, and normal operation of the equipment is kept.

The invention discloses a PTC (Positive Temperature Coefficient) heater, relates to the field of electric heating, and solves the problem that the sealing performance of the PTC heater is influenced by thermal expansion. The PTC heater comprises an automobile connecting plate and a PTC heater support, a support fixing assembly is installed at the joint of the automobile connecting plate and the PTC heater support, a PTC heater assembly is arranged on one side of the PTC heater support, an anti-cracking assembly is installed on one side of the PTC heater support, and a water inlet opening and closing assembly is installed on the other side of the PTC heater support. The PTC heater assembly comprises a first metal protection plate and a second metal protection plate, and a PTC heating core is installed between the first metal protection plate and the second metal protection plate. The first metal protection plate and the second metal protection plate are fixed in an auxiliary mode through external mechanical pressing, and thermal expansion of the first metal protection plate and the second metal protection plate is avoided.