31results about How to "Guaranteed manufacturing accuracy" patented technology

The invention relates to a manufacturing method of a transition section structure, in particular to a manufacturing method of a heavy duty gas turbine transition section structure. The problems that an existing transition section structure is affected by the welding temperature in the welding process to deform, and the product size and follow-up assembly are affected are solved. The tool comprises a transition section assembly body, a first tool, a second tool and a third tool. The transition section assembly comprises a transition section assembly and a transition section outer lining, and the transition section assembly is coaxially sleeved with the transition section outer lining. According to the manufacturing method, a more reasonable tool and a more reasonable assembling and welding sequence are designed according to the characteristics of the transition section structure, the problem of welding deformation is solved, convenience is provided for assembling and welding of the transition section assembly and the transition section outer lining, the overall manufacturing precision of the transition section structure is further guaranteed, and the use performance of the transition section structure is guaranteed. The invention belongs to the technical field of transition section structure manufacturing.

The present invention provides a hydraulically controlled stamping device for a radial diffuser assembly, which relates to the technical field of stamping equipment, and comprises a hydraulic control unit, on which a blanking auxiliary part is installed; the blanking auxiliary part is used for punching holes; a heating forming part is installed on the hydraulic control unit; a lower die separation part is installed on the heating forming part; the lower die separation part is used to move downward and separate from the stamping workpiece; a stamping trimming unit is installed on the blanking auxiliary part; the lower die separation part adopts a detachable structure to ensure stable stamping and one-time punching of a cover plate, and can automatically move downward away from the cover plate to facilitate trimming work, and adopts a detachable structure to ensure the continuity of cover plate processing, so as to solve the problem that the current radial diffuser assembly stamping device is not convenient for automatically trimming the punched holes after stamping the steel plate, and the processing continuity is poor.

The invention discloses a tool for manufacturing a tower stand column, a tower stand column manufacturing method and a tower assembling method. The tool comprises a bottom beam, a bottom plate connected to the bottom beam, a fixed abutting and blocking end and a movable abutting and blocking end which are oppositely placed on the bottom plate, a plurality of arc-shaped supporting plates arranged between the fixed abutting and blocking end and the movable abutting and blocking end, and supporting rods on the two sides of the arc-shaped supporting plates. A sliding block is arranged at the bottom of the movable abutting and blocking end, a sliding rail matched with the sliding block is arranged on the bottom plate, and after the column body is placed into the tool, the movable abutting and blocking end is flexibly adjusted through the sliding rail so that the flange plate and the column body can be accurately positioned and connected. The overall precision of the tower is further improved by designing a manufacturing method of the stand columns and an assembling method of the tower; high-precision production, manufacturing and assembling of the tower are achieved, rod pieces of the same model can be interchanged, the production cost is saved, and the stability and safety of the tower structure are improved.

The utility model provides a container welding tool which is characterized in that a container is an 8-shaped sleeve body formed by two cylinder bodies, a plurality of 8-shaped profiling circular rings are arranged between two sides of the inner wall surfaces of the two cylinder bodies from bottom to top, a guide pillar is arranged between the inner wall surfaces of the cylinder bodies of the 8-shaped sleeve body, the guide pillars are connected with the adjacent 8-shaped profiling circular rings, and the guide pillars are connected with the 8-shaped profiling circular rings. At least one Y-shaped profiling supporting piece is arranged between every two adjacent 8-shaped profiling circular rings, and the Y-shaped profiling supporting pieces are arranged on the central axis of the 8-shaped sleeve body. According to the container welding tool, the two barrel bodies, the upper flange and the lower flange are accurately positioned and welded, deformation of a container in the welding process is controlled, the manufacturing precision of the container is guaranteed, a final gap between the container and a paddle is guaranteed, and the stirring effect is improved; the tool is convenient to mount and dismount and accurate in positioning, and the working efficiency of assembling and welding the container is improved.

This invention provides a core box mold for casting large motor bases, belonging to the field of casting mold technology. The core box mold is manufactured based on the five-part structure of a large motor base sand core. The core box mold includes an inner cavity air hole sand core 1# core box for manufacturing inner cavity air hole sand core 1#, an outer cavity sand core 2# core box for manufacturing outer cavity sand core 2#, an outer cavity sand core 3# core box for manufacturing outer cavity sand core 3#, an outer cavity sand core 4# core box for manufacturing outer cavity sand core 4#, and an outer cavity sand core 5# core box for manufacturing outer cavity sand core 5#. These five core boxes are independent of each other. This invention provides a corresponding core box mold comprising five parts for the new integrated sand core structure of large motor bases, solving the manufacturing problem of the new integrated sand core and creating conditions for achieving boxless casting of the base.

The utility model belongs to the technical field of automobile parts, and relates to an automobile composite door ring which comprises an A column material piece, a B column material piece, a B column lower section material piece, a threshold material piece and an H column material piece which are annularly connected together in sequence, and the H column material piece, the threshold material piece and the B column lower section material piece are in butt joint in sequence in a tailored blank laser welding mode. One end of the A column material piece is connected with the H column material piece in a lap joint spot welding mode, the other end of the A column material piece is connected with one end of the B column material piece in a lap joint spot welding mode, and the other end of the B column material piece is connected with the B column lower section material piece in a lap joint spot welding mode. Compared with a door ring formed by laser splicing, the automobile composite door ring has the advantages that the manufacturing cost can be saved, the weight of a product can be obviously reduced compared with a door ring in a full spot welding lap joint mode, and the welding technical difficulty of the last welding seam does not exist due to the fact that the spot welding lap joint connection mode is adopted for the last welding seam.

The invention discloses a dental instrument designing and manufacturing method, which comprises a dental model manufacturing step, the dental model manufacturing step comprises: designing a dental model, adopting three-dimensional graphic processing software to design a target dental model, the interior of the dental model being a structure with an internal support; and rapidly forming the dental model with the internal supporting structure, wherein the dental model with the internal supporting structure is rapidly formed by adopting 3D printing equipment. According to the design and manufacturing method of the dental instrument, the manufacturing process of the dental instrument is improved, the interior of the dental model is replaced by a supporting structure, a large number of raw materials for printing are saved, and the production cost is reduced; secondly, as the process for manufacturing the tooth jaw model is optimized, the manufacturing precision is ensured, the time required by the whole instrument production process is shortened, and the manufacturing efficiency is improved; the weight of the tooth jaw model with the internal supporting structure is greatly reduced, and the conveying cost in the production process can be saved.

This application provides a one-piece molded frame for electric bicycles and an electric bicycle. The one-piece molded frame includes a windshield structure comprising a central windshield and side windshields. The windward surface of the central windshield is located in a concealed area, while the side windshields are located on either side of the central windshield and are situated in exposed areas. A head tube is formed into the central windshield and is located in the concealed area. The one-piece molded frame of this application eliminates the problem of dimensional deviations at welded parts, effectively ensuring the manufacturing precision of the one-piece frame, making the dimensions of each part of the frame more accurate, improving the fit of the overall assembly, enhancing the overall structural strength of the one-piece molded frame, and strengthening its load-bearing capacity and impact resistance. Furthermore, by dividing the one-piece molded frame into concealed and exposed areas, the desired appearance coverage and overall weight of the electric bicycle can be achieved.

The lower vehicle body floor structure comprises a front wall plate, a front floor, a middle floor, a rear floor and a rear wall plate which are integrally formed, a front wall cross beam is integrally formed on the front side of the front wall plate, a seat cross beam is integrally formed above the front floor, and a rear floor cross beam is integrally formed below the rear floor. The front wall cross beam, the seat cross beam and the rear floor cross beam extend in the left-right direction of the vehicle body and are each provided with a left-right through cavity. According to the lower vehicle body floor structure, the dash panel, the front floor, the middle floor, the rear floor and the rear panel are integrally formed, the integration degree is high, the manufacturing precision of products can be guaranteed conveniently, the manufacturing efficiency of the products is improved, the structural strength of corresponding parts is enhanced through the arrangement of the front wall cross beam, the seat cross beam and the rear floor cross beam, and the service life of the lower vehicle body floor structure is prolonged. According to the structure, the overall strength, rigidity and durability of the floor structure are guaranteed, and the overall NVH performance of a vehicle is improved.

The utility model discloses a kind of monitor liquid crystal box overturning clamping devices monitor liquid crystal box overturning clamping devices, including clamping support, both sides of the clamping support are symmetrically equipped with sliding guide rail seat, the sliding guide rail seat is slidably installed with sliding clamping frame seat by linear sliding guide, sliding clamping frame seat is fixedly installed with sliding clamping frame;Sliding guide rail seat is also equipped with clamping drive motor, and sliding clamping frame is driven by screw nut pair of clamping drive motor;Opposite position is provided with alignment clamping frame in the sliding clamping frame, and the alignment clamping frame and sliding clamping frame constitute clamping pair, and the alignment clamping frame is installed in alignment platform. This clamping type overturning machine is stable in grabbing, and clamping is reliable. The clamping device has the characteristics of stable clamping, high overturning efficiency.

The utility model belongs to the technical field of probe card machining, and particularly relates to a probe card machining device and a probe card, the probe card machining device comprises a machining platform, the probe card machining device further comprises an adjusting mechanism, the adjusting mechanism comprises an adjusting assembly and a fixing platform, the adjusting assembly is arranged on the machining platform, and the fixing platform is arranged on the side, away from the machining platform, of the adjusting assembly; the fixed platform can move under the adjustment of the adjusting assembly, and a wafer can be placed on one side, far away from the adjusting assembly, of the fixed platform; the fixing mechanism comprises a supporting seat and a fixing assembly, the supporting seat is arranged on the machining platform and surrounds the adjusting mechanism, a through hole is formed in the side, away from the machining platform, of the supporting seat, the fixing assembly is arranged on the side, away from the machining platform, of the supporting seat, and when the circuit board is arranged on the fixing assembly, the circuit board covers at least part of the through hole, and the adjusting assembly is adjusted. Therefore, the fixing platform corresponds to the alignment hole on the circuit board. According to the scheme, the precision of the probe card is improved by utilizing the probe card processing device.

The invention belongs to the technical field of garment models, and particularly relates to a multifunctional adjustable garment model rapid forming and manufacturing device which comprises a rack, a control panel is mounted on the side wall of the rack, a distribution box is mounted at one end of the rack, a PLC is mounted in the rack, a side plate is connected to the side wall of the rack, and a control panel is mounted at the other end of the rack. The device comprises a rack, a cutting mechanism, a pressing mechanism and a sample preparation mechanism are sequentially assembled at the top end of the rack from left to right, a feeding mechanism is assembled on the surface of the top of the rack, and a flattening mechanism is assembled at the bottom end of the pressing mechanism. And full-automatic operation of the clothing model manufacturing equipment is realized. Specifically, the cutting mechanism can accurately cut the garment pattern material, and the problem that the manufacturing difficulty is increased due to deviation in the manufacturing process is effectively avoided. And the efficiency and the quality of garment pattern manufacturing are improved.

This invention discloses a radio frequency (RF) neutralizer system and an integrated system of ion source and RF neutralizer. The RF neutralizer system includes: a neutralizer body, comprising a first reaction chamber, an RF coil, and an electrode structure. The RF coil is located on the outer wall of the first reaction chamber and is used to receive RF energy to ionize the process gas within the first reaction chamber. The electrode structure is located inside the first reaction chamber and is used to eject electrons from the first reaction chamber. A first RF driving power supply includes a first detection and control unit, a first DC power supply unit, and a first driving amplification unit. The first detection and control unit is used to detect first current information and first voltage information at the output of the first driving amplification unit. The first driving amplification unit is integrated into the neutralizer body and is disposed together with the neutralizer body within a vacuum process chamber. This invention ensures the fabrication accuracy of semiconductor devices and eliminates the need for impedance matching devices.

The invention relates to a forming method of a ring piece with an L-shaped outer diameter. The forming method of the ring piece with the L-shaped outer diameter comprises the following steps that heating is conducted before forging, specifically, a blank is heated to the forging temperature, and heat preservation is conducted for a period of time; blank forging, wherein the blank is sequentially subjected to upsetting, drawing-out and re-upsetting; the height of the blank is H1; a blank punching step: punching the blank by a punch with the diameter of d1 to obtain a ring blank; the ring blank is heated to the ring rolling temperature, and heat preservation is conducted for a period of time; forming the inner diameter of the ring blank into a conical inclined surface by adopting the conical section of the core rod; and a rolling forming step: moving the core rod, and forming the inner diameter of the ring blank into a rectangular section by adopting the cylindrical section of the core rod. The conical section of the core rod is used for pre-grinding and extruding the inner diameter of the ring blank, so that the inner diameter of the ring blank forms a conical inclined surface, and more materials are accumulated at the position with smaller diameter of the inner diameter of the ring blank. And during subsequent rolling forming, the annular groove of the main roller can be rapidly filled with materials accumulated at the inner diameter position, so that mold filling of the extending part of the outer diameter L-shaped ring piece is normal.

The invention discloses a middle base assembly tool of a filling machine and a middle base manufacturing method, and aims to provide the middle base assembly tool which can reduce the mold opening manufacturing cost of a middle base, is simple in structure and convenient to position, can guarantee the assembly positioning precision of all parts of the middle base, and can improve the production efficiency of the middle base. According to the middle base assembly tool of the filling machine and the manufacturing method of the middle base, the manufacturing precision of the middle base is better guaranteed. A middle base assembly tool of a filling machine comprises a supporting base which comprises a coaxial positioning piece and three cross beams sequentially distributed in the circumferential direction of the coaxial positioning piece, and one ends of the three cross beams intersect and are fixed to the coaxial positioning piece; the supporting assembly comprises three supporting blocks in one-to-one correspondence with the cross beams, and the supporting blocks are fixed to the upper surfaces of the corresponding cross beams; the three positioning assemblies are in one-to-one correspondence with the cross beams and comprise positioning blocks fixed to the upper surfaces of the corresponding cross beams, and positioning grooves are formed in the upper surfaces of the positioning blocks.

The invention provides a flexible detection device and method for the direction of a drainage hole of a sliding rail sleeve. The device comprises a base, a transparent cover, a driving assembly, a rotating table, a loading and unloading assembly and a plug. The transparent cover is connected to the base and is provided with at least one tolerance ring pattern; the driving assembly is mounted on the base; the rotating table is connected to the output end of the driving assembly, and a plurality of loading and unloading assemblies are arranged on the rotating table in the circumferential direction; the plug is in threaded connection with the drain hole and provided with a laser pen, and the axis of the laser pen coincides with the axis of the drain hole. According to the invention, the plug with the laser pen is mounted in the drain pipe joint of the slide rail sleeve, so that visible laser indicating light replaces invisible drain hole pointing, and whether the drain hole pointing of the slide rail sleeve is qualified or out-of-tolerance degree is visually and quantitatively confirmed by combining a calibrated tolerance ring pattern of the drain hole pointing on the transparent cover; compared with an existing qualitative evaluation method of manual operation, the method is smaller in detection error and higher in efficiency.

The invention provides a hydraulic control stamping device for a radial diffuser assembly, and relates to the technical field of stamping equipment, the hydraulic control stamping device comprises a hydraulic control part, and a blanking auxiliary part is mounted on the hydraulic control part; the blanking auxiliary part is used for punching; a heating forming part is mounted on the hydraulic control part; a lower die separating part is mounted on the heating forming part; the lower die separating piece is used for moving downwards to be separated from a stamping workpiece. A stamping trimming part is mounted on the blanking auxiliary part; the lower die separating part is of a separable structure, stable punch forming and one-time punching of the cover plate are guaranteed, meanwhile, the lower die separating part can automatically move downwards to be away from the cover plate, trimming work is facilitated, and the separable structure is adopted, so that the machining continuity of the cover plate is guaranteed; the stamping device aims at solving the problems that an existing stamping device for the radial diffuser assembly is inconvenient to automatically trim a punched hole after a steel plate is stamped and formed, and the machining continuity is poor.

The application discloses a kind of production methods of elliptical suspension bridge steel tower fish belly type section tower section, it is related to bridge construction technical field, comprising the following steps: S1: making various parts, and the parts include outer top plate unit, inner top plate unit, outer bottom plate unit, inner bottom plate unit, outer web unit, inner web unit and baffle unit;S2: the parts in step S1 are assembled and welded, form lower block, middle block and upper block, and the lower block is box type structure, and the middle block, upper block is open channel type structure;S3: the lower block, middle block and upper block are assembled and welded, and the tower section section is made;The application solves the technical problems that fish belly type section tower section is difficult to make in the prior art.

The utility model discloses a water inlet nozzle packaging structure of a ceramic heating pipe, and belongs to the field of water heaters. The water inlet nozzle packaging structure comprises a ceramic heating pipe, a water inlet end of the ceramic heating pipe is provided with a water nozzle lining and a water inlet sealing head, the water nozzle lining is provided with a water inlet butt joint and a heating pipe butt joint which are communicated with each other, and the heating pipe butt joint is in butt joint with a water inlet of the ceramic heating pipe. The water inlet end socket is integrally formed on the water inlet end of the ceramic heating pipe and the outer side of the water nozzle lining in an injection molding mode, the water inlet end of the ceramic heating pipe and the water nozzle lining are wrapped together to form an integral structure, and the water inlet end socket is provided with a water inlet connector communicated with the water inlet butt joint of the water nozzle lining. The water heater has the advantages of being high in integration level, compact in structure, tight in waterproof sealing, convenient to manufacture, low in cost and the like, can be used in an existing water heater and is particularly suitable for a water heating system of an intelligent closestool, the compact structure of the water heater is more beneficial to installation, and the safety of the intelligent closestool is improved.

The invention discloses a 3D printer for printing an ice structure and a printing method of the 3D printer, and relates to the field of 3D printing. The printing head assembly comprises a mounting seat, a printing spray head, a water supply assembly, a spray head cooling assembly and a spray material cooling assembly, wherein the printing spray head is mounted on the mounting seat; the nozzle cooling assembly is installed on the outer side wall of the printing nozzle. The material spraying and cooling assembly is installed on the installation base, and the discharging end of the material spraying and cooling assembly corresponds to the discharging end of the printing nozzle. When the printer is used for manufacturing structures such as ice sculptures and ice houses, materials are convenient to take, liquid water can be directly used as raw materials, and the water is conveyed into the printing spray head through the water supply assembly, rapidly cooled to be below the freezing point from the normal temperature and sprayed out under the action of the spray head cooling assembly; and the sprayed water layer and ice crystals are rapidly condensed on the ice layer below under the action of the spraying cooling assembly, so that the firmness of connection between the ice layers can be enhanced during layer-by-layer printing, interlayer flowing is prevented, the manufacturing efficiency of the ice structure is improved, and the manufacturing precision of the ice structure can be ensured.

The utility model relates to the technical field of plastic product production, and discloses a pressing device for plastic product production, which comprises a workbench, a placing disc used for adjusting the direction and angle of a plastic product is arranged on the workbench, a plurality of connecting plates distributed at equal intervals in the circumferential direction are arranged on the placing disc, and the connecting plates are arranged on the workbench. All the connecting plates are used for fixing plastic products, and an adjusting assembly used for adjusting the positions of the connecting plates is arranged on the containing disc. According to the pressing device for producing the plastic products, the contact area of the device to the plastic products is increased during working, the uniformity and consistency of acting force applied by the device to the plastic products are guaranteed, the plastic products are prevented from moving or deviating, the manufacturing precision of plastic product processing is guaranteed, and the production efficiency is improved. And meanwhile, damage or deformation of the plastic product caused by force concentration is also avoided.

The invention belongs to the technical field of pressure vessel manufacturing, and particularly relates to a machining method of a large-diameter first-and-second type flat welding flange with a bushing ring, which reduces the requirement on temperature control in the welding process through the adjustment of the steps of reserving the machining amount of the flange, not machining a bolt hole, applying an anti-deformation tool scheme, eliminating stress through local heat treatment, performing one-time machining and the like. The uncertainty caused by welding deformation is thoroughly shielded, and it is guaranteed that the deformation amount obtained after the flange and the cylinder are installed and welded reaches a perfect repairing result; meanwhile, the perpendicularity of flange bolt holes is guaranteed, smooth installation of bolt fasteners in the assembling process is guaranteed, and the problems that welding deformation cannot be thoroughly removed, and flange uncontrollable deformation is caused by the fact that flat welding flange welding is concentrated at the flange position (generally two positions) are solved.

The invention discloses an impeller detection system and a detection method. The detection system comprises a working platform, a clamping mechanism is provided on the working platform for clamping the impeller, the clamping mechanism can be rotatably arranged on the working platform to rotate the impeller, a fixing column is vertically provided on the working platform, a laser displacement sensor and a rotation speed sensor are provided on the fixing column, the laser displacement sensor is used to measure the distance from the laser displacement sensor to the impeller to be measured position, a reflective sheet corresponding to the rotation speed sensor is provided on the clamping mechanism, and it is convenient to cooperate with the rotation speed sensor to measure the number of revolutions of the impeller; the laser displacement sensor and the rotation speed sensor have the same data acquisition frequency and are respectively connected to the detection unit, so as to facilitate the transmission of the measurement data to the detection unit, so that the detection unit can detect and analyze the eccentricity and ellipticity of the impeller, the eccentricity of the blade, the deformation degree of the blade profile and the uniformity of the blade distribution, and the detection accuracy is high and the detection efficiency is high.

The application belongs to the technical field of shaft sleeve processing, and discloses a processing method of a marine shaft sleeve and the marine shaft sleeve. First, the shaft sleeve original piece is installed on a processing device, and the processing angle of a processing tool is adjusted, so that the processing tool is used for three-time cutting processing of the shaft sleeve original piece with different angle schemes and different cutting processing parameters of cutting speed, feed rate and cutting depth, to form a shaft sleeve inner hole. Then, a polishing device is used to polish the hole wall of the shaft sleeve inner hole with a preset processing scheme, until the hole diameter of the shaft sleeve inner hole is equal to the inner diameter of the marine shaft sleeve, and the roughness of the hole wall of the shaft sleeve inner hole is the preset roughness, so that the shaft sleeve original piece is formed into the marine shaft sleeve. The marine shaft sleeve is processed by using the processing method, so that the labor amount of workers can be reduced, the processing cost and the labor cost can be reduced, and the working efficiency of the processing of the marine shaft sleeve can be improved.

The utility model relates to a welding tool, in particular to a welding tool for gas turbine flame tube assembly welding. The utility model aims to solve the problem that the use performance of a flame tube is affected due to the fact that the flame tube is not concentric after being installed and welded in the prior art. The flame tube welding fixture is simple in structure and convenient to operate, the supporting base, the first supporting unit, the second supporting unit and the top cover play a role in positioning and shaping all components of a flame tube, the concentricity of the flame tube is guaranteed, stress in the welding process is effectively counteracted, and welding deformation in the welding process is reduced; the inner circumferential face of the flame tube, the top cover and the supporting base form a cavity, argon is filled into the cavity, the effect of protecting a welding seam is achieved in the welding process, the overall manufacturing precision of the flame tube is further guaranteed, and the use performance of the flame tube is guaranteed. The utility model belongs to the technical field of flame tube welding.

The invention discloses a preset type high-precision forming method. The method comprises the steps that a connecting plate A preset type structure is arranged; a stamping and bending structure of the connecting plate A is arranged; a connecting plate B pre-shaping bending structure is arranged; a stamping and bending structure of the connecting plate B is arranged; a bending arch pre-bending structure is arranged; a primary bending arch shaping structure is arranged; a secondary bending arch shaping structure is arranged; a three-time bending arch shaping structure is arranged; a pre-bending structure of the connecting plate C is arranged; a connecting plate C shaping structure is arranged; an A-degree angle shaping structure is arranged; the continuous pre-bending type high-precision forming method sequentially comprises the steps of connecting plate A pre-shaping, connecting plate A stamping and bending, connecting plate B pre-shaping and bending, connecting plate B stamping and bending, bending arch pre-bending, primary bending arch shaping, secondary bending arch shaping, tertiary bending arch shaping, connecting plate C pre-bending, connecting plate C shaping and A-degree angle shaping.

The invention belongs to the technical field of walking mechanism trolley frame manufacturing, and discloses a stacker-reclaimer walking mechanism trolley frame and an assembly line manufacturing process thereof. The trolley frame comprises side plates on the two sides, a half wheel sleeve assembly, a half shaft sleeve and a half shaft sleeve bending piece; a side plate thickening plate is arranged on the side plate on one side; end plates are arranged at the two ends of the top plate, a side plate is arranged between the two end plates, and a shaft sleeve opening of the side plate is tightly attached to the half shaft sleeve; half wheel sleeve assemblies are mounted in wheel sleeve openings of the side plates; one side of the partition plate is fixed to the inner side face of the half shaft sleeve assembly, and the two side faces of the other side of the partition plate are provided with sealing plates. Inclined partition plates are arranged on the side plates on the two sides of the partition plate, and one side of each inclined partition plate is fixed to the corner of the half-shaft sleeve assembly; a bottom plate is arranged on the sealing plate, and a rib plate is arranged on the bottom plate. According to the invention, the unnecessary hot work correction amount is reduced, the manufacturing process is optimized, the tire position occupation time is reduced, and the production efficiency is improved.

This application relates to a low-power, high-reliability Schottky chip with self-adjusting injection efficiency, belonging to the field of semiconductor processing technology, comprising: a substrate layer, wherein the substrate layer is highly doped with N. + A substrate layer for reducing the on-resistance of the chip; an epitaxial layer disposed on the substrate layer; a Schottky junction region located on the epitaxial layer; and a Speed ​​structure region containing several small P-type transistors. ++ Grid; P + The protective ring, the P + The junction protection rings are located at both ends of the Schottky junction region; N ++ A junction cutoff ring is located at the chip terminal; multilayer passivation regions are used to enhance the product's resistance to high temperature, high humidity, and radiation; front and back metal electrodes are used for electrical connections. This application employs highly doped N... + The substrate layer effectively reduces the on-resistance of the chip, thereby significantly improving the current transmission efficiency.

The application provides a steel tower segment assembling method, and relates to the technical field of bridge construction process.The steel tower segment assembling method divides the steel tower segments which need to be manufactured separately into a middle anchor chamber module, a side box chamber module and a side anchor chamber module, can be manufactured simultaneously, effectively shortens the manufacturing time of the steel tower segments manufactured separately, and effectively improves the manufacturing efficiency of the steel tower segments; meanwhile, in the assembling process, the side anchor chamber module is installed by taking the middle anchor chamber module as a reference, the side box chamber module is installed by taking the middle anchor chamber module and the side anchor chamber module as references, the preliminary assembling of the steel tower segment can be completed, the assembling precision of the steel tower segment is relatively reliable by sequentially assembling in the same direction; finally, the middle anchor chamber module, the side anchor chamber module and the side box chamber module are sequentially welded and fixed, the steel tower segment with high manufacturing precision which can meet the construction and installation precision of the whole steel tower is obtained, and the overall construction quality of the bridge and the use stability after the completion of the project are ensured.

The invention provides a bidirectional piezoelectric stick-slip driver based on a flexible amplification mechanism and a driving method.The driver comprises a base, a guide rail sliding block, a bearing structure and a flexible amplification driving mechanism, and the flexible amplification driving mechanism comprises a first bridge type two-stage amplification mechanical arm, a second bridge type two-stage amplification mechanical arm and a fixing assembly; the first bridge type two-stage amplification mechanical arm comprises a first input beam, a first bridge arm assembly, a first output beam and a second bridge arm assembly, and the second bridge type two-stage amplification mechanical arm comprises a second input beam, a third bridge arm assembly, a second output beam and a fourth bridge arm assembly. The first bridge arm assembly, the second bridge arm assembly, the third bridge arm assembly and the fourth bridge arm assembly are all connected with the first fixing beam, the second bridge arm assembly and the fourth bridge arm assembly are all connected with the second fixing beam, the output efficiency of the driver can be improved, the production speed is increased while the manufacturing precision of automobile parts is guaranteed, and the production cost is reduced. And the production efficiency of the automobile is further improved.