234results about How to "Guaranteed concentricity" patented technology

The utility model relates to an anti-backpressure high-precision spring safety valve which comprises a valve body, a valve seat, a valve clack, a valve rod, a guide sleeve and a spring pressure setting device, the lower end of the guide sleeve is pressed at an inlet of the valve body through a radial outer step of the valve seat, and a protruding cylinder arranged on the upper portion of the valve seat is concentrically sleeved in a guide cavity of the guide sleeve. The valve clack is sleeved in the guide cavity of the guide sleeve to form a piston type dynamic sealing structure, so that the concentricity of the valve clack and the sealing surface of the valve seat can be kept, and the sealing matching performance of a sealing pair is improved; the upper end of the guide sleeve is in sealing connection with the inner wall of the spring cavity on the upper portion of the valve body, the valve clack and the spring cavity are sealed and isolated from an outlet cavity of the valve body, back pressure of outlet cavity medium pressure on the valve clack is eliminated, and influence of corrosion of media on the spring on setting pressure is avoided. The device has the advantages of high pressure setting precision, reliable sealing performance of a sealing pair and the like.

The invention relates to the technical field of machining, and discloses drilling equipment with an auxiliary positioning function, which comprises a workbench, a multi-station continuous drilling mechanism, two groups of concentric positioning mechanisms and a synchronous conveying mechanism, a bottom cavity is fixedly formed in the bottom of the workbench, a plurality of bases are fixedly arranged at the bottom of the bottom cavity, the synchronous conveying mechanism is arranged on the left side of the top of the workbench, and the multi-station continuous drilling mechanism is arranged in the middle of the top side of the workbench. The concentric positioning mechanisms are arranged on the two sides of the multi-station continuous drilling mechanism. According to the drilling equipment, the drill bit can be pushed to move towards the outer wall of the pipeline while rotating through movement of the conical barrel, multi-station synchronous drilling is conducted on the pipeline, at the moment, the spring is compressed, elastic force in the opposite direction is generated, and when the movable seat moves in the opposite direction, the drill bit is reset under the action of the spring. The drilling synchronism of the pipeline can be guaranteed, and the drilling efficiency and precision are improved.

The utility model discloses an upper air inlet burner, which comprises a base assembly, a gas inlet assembly and a gas outlet assembly, the base assembly is provided with a circular support table and a gas outlet seat, the gas outlet seat is arranged outside the support table and fixedly connected with the support table, and the gas outlet seat comprises an outer ring gas outlet seat and an inner ring gas outlet seat which are parallel and arranged in the same direction; the fire distributor is installed at the top of the supporting table, the orthographic projection of the fire distributor covers the supporting table and the air outlet base, and an outer injection pipe and an inner injection pipe which are parallel and arranged in the same direction are arranged at the bottom of the fire distributor. According to the upper air inlet burner, the size of the base assembly is reduced, and meanwhile the problem that the upper air inlet burner is not easy to clean is solved.

The utility model relates to the technical field of brake shoe roller press fitting, in particular to brake shoe roller bushing press fitting equipment. According to the technical scheme, the brake shoe roller bushing press-fitting equipment comprises a back plate, a base, a bottom plate and a pressing plate, the base is installed on the bottom plate, a baffle is installed above the base, a limiting sleeve is installed above the baffle, a push plate is installed in the base, the push plate is elastically installed in the base through a spring, and the pressing plate is installed on the base. A limiting seat and a limiting shaft are arranged on the push plate, a back plate is installed at one end of the bottom plate, an air cylinder is installed on the back plate, and a push rod of the air cylinder is connected with a pressing plate through a connecting rod. According to the utility model, the roller and the bushing can be conveniently limited during press fitting, so that the assembly precision of the roller and the bushing is ensured.

The invention discloses a disc type rotating device of an automobile seat, and belongs to the technical field of automobile seats. Comprising a lower chassis; the group of lower gaskets are arranged on the upward side of the lower chassis; the rotating disc is supported on the group of lower gaskets and is provided with a rotating disc centering mechanism abdicating hole; the rotating disc centering mechanism is fixed with the lower chassis; the rotating disc driving mechanism is used for driving the rotating disc to rotate; the structure is characterized in that a gear ring plate is directly formed in the middle area of the lower chassis, a lower chassis center hole is formed in the center area of the gear ring plate, and a gear ring is formed on the wall body of the side, facing the lower chassis center hole, of the gear ring plate; the rotating disc centering mechanism is fixed to the lower chassis, a rotating disc locking and unlocking executing mechanism is arranged on the rotating disc, and a lock shaft traction connecting mechanism is arranged on the rotating disc driving mechanism. The device has the advantages of compact structure and convenience in manufacturing and assembling; the stable effect tending to be gapless when the rotating disc rotates can be fully guaranteed; the safety is embodied; the requirements for flattening and light weight can be met, and the adaptability to different vehicles is improved.

The invention provides an actuator, a joint module, a mechanical arm, a biped robot, a quadruped robot, a quadruped robot, a humanoid robot and a robot. The actuator comprises a shell, a motor assembly and a speed reducer assembly, the shell comprises an outer shell part, a first extension part and an inner cylinder part, and a first containing cavity with an opening is defined; the motor assembly is composed of a rotor, a stator, a rotor adapter and a rotary supporting assembly, the rotor adapter is provided with a rotor connecting part, a second extending part and a first connecting shaft part and is connected with the rotor, the rotor and the stator are arranged in the first containing cavity, and the rotary supporting assembly is arranged between the first connecting shaft part and the inner cylinder part; an input end transmission shaft of the speed reducer assembly is connected with the first connecting shaft part and rotates along with the rotor adapter, the second extension part is close to the speed reducer assembly, and the first extension part is far away from the speed reducer assembly relative to the second extension part. According to the invention, the transmission precision of the actuator and the stability of power output are ensured while the small size and compactness of the actuator are realized.

The invention relates to the technical field of wafer cutting, and provides a cutting-up method of a gallium arsenide wafer, in a cutter grinding stage, two times of cutter grinding are achieved through a cutter grinding plate, on one hand, diamonds of a grinding wheel blade can be exposed, a chip pocket is generated, on the other hand, the grinding wheel blade can be rounded, it is guaranteed that the grinding wheel blade and a main shaft are concentric, and the cutting-up efficiency is improved. Moreover, the cutting edge part in contact with the knife sharpening plate can be damaged during knife sharpening each time, and the cutting edge of the grinding wheel blade can be changed into a V shape, so that the purpose of trimming the shape of the cutting edge is achieved, the contact area between the cutting edge and a material is smaller in the product cutting process, the impact crushing impact force on the material is smaller, the breakage and cracks of particles after cutting can be obviously reduced, and the product quality is improved. The cutting quality of the wafer is improved, so that the yield of wafer products is improved; in the cutting-up stage, the wafer is preferentially divided into a plurality of stepping wide-strip-shaped cutting channels, and then fine division is carried out, so that the material stress can be preliminarily released, and the large area of the wafer wide strip is enough to resist the crack extension problem.

The invention discloses a machining method for an input shaft of an electric drive assembly generator. The machining method comprises the following steps of first finish turning, second finish turning, gear hobbing, spline broaching, heat treatment, spline hard broaching, outer circle and end face grinding and gear grinding. In the step of hard pulling of the spline, the internal spline is subjected to hard pulling after being heated, the large diameter, the small diameter and the tooth side of the internal spline are subjected to hard pulling, and the precision of the internal spline subjected to heat treatment is corrected. In the step of grinding the outer circle and the end face, an internal spline of the input shaft of the generator is expanded, the end face and a center hole are positioned, and the outer circle and the end face of the input shaft of the generator are ground. In the gear grinding step, the internal spline of the input shaft of the generator is expanded, the end face is positioned, and gear grinding is conducted on the gear. Thermal deformation of the internal spline is corrected after heat treatment, then the internal spline is adopted as a standard for machining of subsequent procedures, the standard is unified, and it is guaranteed that the internal spline of the generator input shaft and the external spline of the generator rotor are well matched, torque is transmitted, a bearing operates stably, and operation stability of an electric drive assembly is guaranteed.

The invention discloses a thermal power steam turbine general assembly through-flow measurement method. Relates to the field of thermal power generation turbosets. At present, the problem that the installation progress of a power plant is affected due to the fact that an existing rotor manufacturing period and a stator assembly manufacturing period are not matched due to a final assembly assembly period is solved. A high-precision numerical control vertical lathe is used for machining the steam turbine stator part sleeve gland sealing teeth, the concentricity requirement of the through-flow position of the stator part sleeve is met, machining diameter data phi A are measured, during final assembly of a steam turbine, the center of the stator part sleeve is adjusted, a dummy shaft tool is used for measuring the gland sealing tooth center value, the up-down deviation omega and the left-right deviation delta, and the upper half part of the stator part sleeve is combined. The diameter phi A of the gland plate is measured again, and it is guaranteed that the deviation between the diameter phi A and the machining deviation is within 0.10 mm; machining the rotor by using a numerical control horizontal lathe, ensuring the concentricity of the shroud ring and the body position, and measuring the machining diameter phi B; and radial through-flow clearance calculation and gland sealing tooth repair are carried out to replace an original rotor in-place actual through-flow clearance measurement method, so that the production efficiency is improved. The method is applied to the field of turbine assembly measurement.

The utility model relates to the technical field of electronic cigarettes, in particular to a heating tube packaging structure which comprises a heating tube, a first connecting tube, a second connecting tube and a first heat shrink tube, the first connecting tube is arranged at the first end of the heating tube and is coaxial with the heating tube, the second connecting tube is arranged at the second end of the heating tube and is coaxial with the heating tube, and the first heat shrink tube is arranged in the second connecting tube. The first connecting pipe, the heating pipe and the second connecting pipe are connected into a whole through a first heat shrink tube. The heating tube packaging structure provided by the utility model solves the difficulty in fixing the temperature measuring element and the lead, avoids health hidden dangers caused by packaging with glue, heat preservation cotton and the like, has the characteristics of small heat capacity, good heat insulation, good adaptability and the like, can meet the requirements of quick response, accurate temperature control and low energy consumption, and is suitable for popularization and application. The mouth feel of the electronic cigarette smoking set made of the heating pipe packaging structure can be comparable with that of an international advanced electromagnetic induction inner core heating smoking set, and a special cigarette with a metal heating sheet does not need to be matched.

The utility model discloses an outer rotor shaft brake band-type brake structure elevator traction machine which comprises a machine shell, the machine shell is in an annular shape, a containing space is formed in the central axis of the machine shell, two bearings are arranged in the containing space, a main shaft is arranged between the two bearings, a stator is arranged at the position of the machine shell, and the stator is connected with the main shaft. The main shaft is coaxially connected with a rotor corresponding to the stator, the rotor of the main shaft is connected with a traction wheel through a bolt, a shaft brake type brake is arranged on the side, away from the traction wheel, of the main shaft, and the main shaft is coaxially connected with a brake disc corresponding to the shaft brake type brake. The beneficial effects of the utility model are that the two bearing positions are installed on the casing, so that one-time processing is facilitated, and concentricity is guaranteed; the brake is arranged at the rear end of the main shaft, so that the width of the traction machine is small, and layout of an elevator shaft is facilitated.

The utility model discloses a stable clamping sleeve punch forming structure device. The stable clamping sleeve punch forming structure device comprises an upper die assembly, a lower die assembly, an outer guide assembly, an inner guide assembly and a stripping mechanism. A stretching female die is arranged at the bottom of the upper die assembly, and a stretching forming punch is arranged at the top of the lower die assembly. The outer guide assembly comprises an outer guide sleeve and an outer guide column which are matched with each other and arranged on the upper die assembly and the lower die assembly respectively. The inner guide assembly comprises an inner guide sleeve and an inner guide column which are matched with each other; the stripping mechanism comprises a stripping plate and an upper die stripping ejector rod, the stripping plate is located at the top of the lower die assembly and arranged on the periphery of the stretching forming punch in a sleeving mode, upward linear displacement is pushed through a spring assembly, and one end of the upper die stripping ejector rod is arranged in the stretching female die in a penetrating mode to eject a formed part out. According to the device disclosed by the utility model, the concentricity of products is ensured and the qualification rate of the products is improved through the guiding and positioning functions of the outer guiding assembly and the inner guiding assembly; and meanwhile, automatic blanking can be performed through the stripping mechanism, so that the production efficiency is improved.

The utility model provides an engine exhaust assembly welding tool, and relates to the technical field of engine exhaust assembly welding tools, the engine exhaust assembly welding tool comprises a base, and a clamping device is arranged on one side of the base. The engine assembly can be arranged on the top of the base in a sleeving mode, the center connecting rod of the engine assembly is placed in the round hole and connected with the base, the concentricity of the installation edge and the inner ring is ensured, then the adjusting screw is screwed to drive the expansion block to be pressed downwards in place, the supporting block is ejected outwards in the inner wall of the sliding groove, and the appearance of the installation edge is fixed. Then the extrusion screw is tightened to abut against and fix the ejected supporting block, the mounting seat and the mounting edge of the assembly are fixed and limited to facilitate welding treatment, the welding deformation is reduced, the welding quality is improved, meanwhile, the expansion operation is simple, only the adjusting screw needs to be tightened to press the expansion block in place, and the expansion efficiency is improved. And a lot of operation time is saved.

The invention discloses follow-up welding forming clamping equipment for inner and outer circumferential welds of a cylinder, and belongs to the field of welding equipment. The welding forming clamping equipment comprises a base, a lower pressing mechanism, an upper pressing mechanism, a lifting driving mechanism, a turn-over driving mechanism, a turn-over seat, a rotary driving mechanism and a clamping positioning mechanism. The holding and clamping positioning mechanism is used for supporting the thin-wall barrel, and self-deformation of the barrel is avoided; the upper pressing mechanism and the lower pressing mechanism are matched to clamp and fix all the to-be-welded products, the positioning precision and the clamping stability of the parts are guaranteed through the ring body abutting rolling wheels, and circular seam welding deformation can be reduced easily; besides, the upper and lower pressing mechanisms are used for driving the cylinder part to perform rotary welding, the turn-over mechanism is used for driving the cylinder part to perform turn-over welding, one-time welding forming of inner and outer welding seams at the two ends of the cylinder part can be achieved through one-time clamping, the welding production efficiency is improved, the welding precision is greatly improved, and the welding reject ratio is effectively reduced; and the economic benefits of enterprises are improved.

The utility model relates to the technical field of motors, in particular to a rotor assembly and a motor using the rotor assembly, which comprise a rotor core, a rotor shaft penetrating through the rotor core, and an insulating framework and a magnetic ring structure which are sleeved on the rotor shaft, the magnetic ring structure comprises an induction magnetic ring and a magnetic ring support which are integrally formed in an injection molding mode. A matching hole suitable for the rotor shaft to pass through is formed in the magnetic ring bracket; the matching hole comprises a first inner diameter hole and a second inner diameter hole which are communicated with each other; the first inner diameter hole is used for forming fixed fit with a rotor shaft, and the second inner diameter hole is used for forming fixed fit with an insulating framework. According to the utility model, the stability of the use performance of the adopted magnetic ring structure can be improved.

The utility model discloses a flywheel capable of improving wind resistance, and relates to the field of driving structures, the flywheel comprises a flywheel main body, and the flywheel main body is rotatable; the number of the blocking parts is at least one, and the blocking parts are fixed to the flywheel body and used for improving wind resistance. The utility model has the effect of prolonging the service life of the element.

The utility model belongs to the technical field of motor manufacturing, and particularly relates to magnetic ring and casing assembling equipment, which comprises a casing carrying mechanism, a feeding position, a gluing position and a transfer position are sequentially arranged along a carrying path of the casing carrying mechanism, and a casing output from the feeding position is carried to the gluing position for gluing; the machine shell gluing mechanism is close to the gluing position and comprises a gluing execution assembly used for gluing the machine shell and a visual detection assembly used for detecting the gluing result, and when the detection result of the visual detection assembly is qualified, the machine shell carrying mechanism carries the glued machine shell from the gluing position to the transfer position; the rotating mechanism is provided with a plurality of installation parts in the circumferential direction, and a magnetic ring pushing position, a machine shell transferring position and a press-fitting position are sequentially arranged on the rotating path of the rotating mechanism. And the magnetic ring pushing mechanism is arranged at the magnetic ring pushing position and is used for pushing the magnetic ring to the mounting part. According to the magnetic ring press-fitting machine, automatic press-fitting of the magnetic ring and the machine shell can be achieved, the gluing uniformity of the machine shell is ensured, and the press-fitting concentricity of the magnetic ring and the machine shell is ensured.

The utility model discloses an automatic bearing press-fitting mechanism, which relates to the technical field of bearing processing, and adopts the technical scheme that the automatic bearing press-fitting mechanism comprises a workbench, and a positioning component and a press-fitting component are arranged at the top of the workbench; the positioning assembly comprises a first motor, the first motor is fixedly arranged at the top of the workbench, the output end of the first motor is fixedly connected with a transmission shaft, the transmission shaft is fixedly sleeved with a second gear, the bottom of the workbench is connected with an annular gear through a bearing, the second gear is meshed with the annular gear, and a plurality of positioning units are arranged at the top of the workbench. The positioning unit comprises a first gear, the first gear is meshed with the annular gear, one side of the first gear is fixedly connected with a connecting shaft, the connecting shaft penetrates through the workbench and is connected with the workbench through a bearing, one end of the connecting shaft is fixedly connected with a rotating plate, and the top of the rotating plate is fixedly connected with a movable shaft; the utility model has the beneficial effects that the concentricity of the bearing and the shaft rod is ensured, the press fitting work is convenient, and the production efficiency is improved.

The present invention provides an injection device, belonging to the field of injection molding technology, comprising: an injection cylinder, a rotary motor and a screw are sequentially arranged along the injection direction, wherein the injection cylinder comprises a cylinder body, a piston rod connected to the screw is built therein, and a wear-resistant belt and a flat key are arranged at one end of the piston rod connected to the screw; the rotary motor comprises a stator and a rotor arranged inside and outside, and a slide groove is arranged on the inner wall of the rotor to form a keyway with the flat key, and the slide groove runs through both ends of the rotor along the axis direction of the rotor, wherein the moving stroke of the flat key is the overall length in the axis direction of the rotor, and the linear movement of the screw is driven by the translation of the piston rod, and the piston rod and the screw are driven to rotate synchronously by the rotor. The present invention expands the injection stroke of the piston rod by increasing the moving stroke of the flat key, thereby increasing the single injection volume, thereby improving work efficiency, and ensuring the concentricity of the piston rod and the screw.

A step-by-step forming device for a front disc of a fan volute comprises a deep drawing device, a trimming and punching device, a flanging and hole flanging device and an automatic mechanical arm which plays a workpiece transferring role among the deep drawing device, the trimming and punching device and the flanging and hole flanging device. The trimming and punching equipment is used for trimming and punching on the plate subjected to preliminary deep drawing, and the flanging and hole flanging equipment is used for flanging and hole flanging on the plate subjected to trimming and punching to obtain the fan volute front disc with the required shape; the device comprises three independent devices, each device completes one working procedure of a workpiece, so that hole flanging of the workpiece is located in a safe area, and the product percent of pass is high; in the first working procedure treatment, the workpiece is treated in the tensile stress state, so that the large arc surface of the workpiece can be well formed, and the stability is high; and in the last process, flanging and hole flanging are completed in the same process, so that the concentricity of hole flanging and flanging of the product can be well ensured.

The utility model discloses a rotary traction stranding machine, which comprises a rack, a rotary bracket, a first leading wheel, a second leading wheel, a first driving mechanism and a second driving mechanism, the rotating bracket is rotationally arranged on the rack around the central shaft of the rotating bracket; the first leading wheel and the second leading wheel are sequentially pivoted to the rotating bracket; the first driving mechanism drives the first leading wheel to rotate; the second driving mechanism drives the rotating support to rotate. The rotating support comprises a first main shaft, a first supporting disc, a second main shaft, a second supporting disc, a pair of upper supporting shafts and a pair of lower supporting shafts. The first supporting disc is fixed to the first main shaft, the second supporting disc is fixed to the second main shaft, the pair of upper supporting shafts is fixed between the first supporting disc and the second supporting disc, and the pair of lower supporting shafts is fixed between the first supporting disc and the second supporting disc. A fixing clamp is arranged between the upper supporting shaft and the lower supporting shaft which are located on the same side. The rotating shaft has the advantages of being high in concentricity, stable in rotation and long in service life.

The utility model discloses a direct-drive electro-magnetic annular synchronous motor, and belongs to the technical field of large-scale synchronous motors. The motor comprises a split stator which is formed by splicing and fixing a plurality of stator petals along the circumferential direction; the block magnetic poles form a motor rotor, a plurality of independently-formed magnetic pole units are arranged at intervals in the circumferential direction, and each magnetic pole unit is directly and fixedly installed on the outer wall of the load rotating cylinder; the supporting and sealing structure is arranged at the axial end part between the split stator and the block magnetic pole and is used for sealing a gap between the split stator and the block magnetic pole; and the collector ring and brush carrier system is arranged at one axial end of the motor, and the output end of the collector ring and brush carrier system is electrically connected with the excitation windings of the block magnetic poles. According to the utility model, the split stator and the block magnetic pole structure are adopted, so that the transportation and field installation of the ultra-large motor are facilitated; the rotor is directly mounted on the outer wall of the milling cylinder to realize direct drive, a gear transmission link is omitted, the transmission efficiency is high, and operation is stable; a multi-layer sealing structure adapts to a high-dust environment, and the reliability is high; the speed regulation performance is good and the maintenance is convenient.

The present application relates to the technical field of welding, and specifically discloses a motor liquid-cooled shell welding device, which comprises a workbench, a rotating disc, an inner-outer positioning mechanism, a coaxial positioning mechanism and a pressing mechanism. The inner-outer positioning mechanism, the positioning shaft, the insert, the positioning locking assembly and the pressing mechanism are used for multi-dimensional guarantee of the concentricity of the inner cylinder, the outer cylinder, the annular plate and the welding machine from the bottom, the top and the side, so that the problems of weld offset, uneven penetration, one-side wide and one-side narrow of the welding seam of the welding machine and the like caused by the rotation centrifugal force of the inner cylinder, the outer cylinder and the annular plate are effectively avoided. Meanwhile, the pressing mechanism is provided with a plurality of circumferentially uniformly distributed pressing assemblies, which are matched with the bearing steps on the inner cylinder and the outer cylinder to realize the up-down bidirectional limiting of the annular plate, prevent the annular plate from floating due to the centrifugal force during the rotation and affect the welding quality of the welding seam, and the wear-reducing roller can prevent the annular plate from floating and radial movement due to thermal deformation without affecting the rotation of the workpiece.

The invention relates to the technical field of gear machining, in particular to efficient internal spline differential radial reciprocating grinding equipment which comprises an equipment base, a cutter mounting mechanism and a workpiece machining mechanism. The tool mounting mechanism comprises a mounting base, a tool sliding block, a supporting base, a rotating shaft and a machining tool. The workpiece machining mechanism comprises a workpiece base, a workpiece sliding block, a fixing base, an axial workpiece driver, a radial workpiece driver and a workpiece rotation driver. The axial workpiece driver is used for driving the workpiece seat to move left and right along the axial sliding rail; the radial workpiece driver comprises a movable plate, a movable sliding block, a movable sliding rail, a side wing plate, a lead screw, a workpiece radial motor and a connecting lug; the workpiece rotation drive is used for driving the internal spline workpiece to complete rotation operation at a preset angle. According to the invention, the machining operation of axial reciprocating motion and radial feed grinding can be completed while grinding feed is performed between the forming grinding cutter and the internal spline of the workpiece, so that the purpose of grinding spline deformation fine trimming treatment is achieved, and the machining precision of the internal spline is improved.

The utility model relates to the field of powder metallurgy part measuring devices, and discloses an inner diameter measuring device for an automobile powder metallurgy part. The pneumatic measuring instrument comprises a pneumatic measuring instrument body, a base located on one side of the pneumatic measuring instrument body, an inner diameter measuring column head arranged on the top of the base and a rotating sleeve, the rotating sleeve is rotationally connected with the base, the inner diameter measuring column head is located in the rotating sleeve and concentrically arranged, and the rotating sleeve is provided with a plurality of clamping columns. After a part is placed in the rotating sleeve, the multiple clamping columns clamp the part and enable the part, the inner diameter measuring column head and the rotating sleeve to be kept concentric. According to the utility model, the internal diameter value of a part measured by the pneumatic gauge body is more accurate; the clamping column is more stable in the process of driving the part to rotate after clamping the part; the operation is convenient.

The utility model relates to low -voltage power distribution data acquisition equipment technical field discloses a kind of low -voltage power distribution data acquisition equipment, including base, the top of the base is fixedly connected with open-close type current transformer bottom end, the top of the base is rotatably connected with open-close type current transformer top end, one end of open-close type current transformer bottom end and open-close type current transformer top end is magnetically connected by magnet, by setting fixed cylinder, plug-in column and arc centering plate in the inner wall of open-close type current transformer, it can be realized automatic limiting and alignment when mutual inductor is folded, guarantee the concentricity between cable and mutual inductor, improve detection accuracy;By the cooperation of bidirectional screw rod, threaded sleeve block and locating ring, adjustable clamping to line is realized, the stability of mutual inductor in the process of operation is enhanced, simultaneously, rubber block is set in clamping piece bottom end, effectively buffers clamping force, avoids damaging the insulating layer of line.

The invention relates to the technical field of nuclear power installation, in particular to a penetration piece welding process concentricity control device which comprises an installation mechanism, a connecting mechanism and a positioning mechanism. A through hole is formed in the mounting mechanism, and the mounting mechanism is arranged on the outer side of the penetrating piece in a sleeving mode through the through hole and located between the penetrating piece and the civil engineering sleeve; the multiple connecting mechanisms are evenly distributed at intervals in the circumferential direction of the upper surface of the mounting mechanism, the positioning mechanisms correspond to the connecting mechanisms one to one, and the ends of the positioning mechanisms penetrate through the connecting mechanisms to alternately abut against the side wall of the penetrating piece or the civil engineering sleeve. According to the device for controlling concentricity in the penetration piece welding process, concentricity deviation in the construction process can be reduced, then the problem of deformation caused by lack of control in the welding process is reduced, and the working efficiency can be effectively improved.

The invention discloses a wafer rotating mechanism, process equipment of a semiconductor device and a process method of the semiconductor device. The wafer rotating mechanism comprises an auxiliary cavity which is located at one side of the main reaction cavity and is communicated with the main reaction cavity; the rotary bearing assembly is located in the auxiliary cavity; and a controller configured to: in response to completion of deposition of a first layer of thin film on the surface of the wafer in the main reaction chamber, jack up the wafer from the heating disc; feeding the rotary bearing assembly to the lower part of the wafer in the main reaction cavity; enabling the wafer to fall onto a rotary bearing assembly, and carrying out the rotation of the wafer; in response to completion of rotation of the wafer, the wafer is jacked up from the rotary bearing assembly; the rotary bearing assembly is moved out of the main reaction cavity; and enabling the rotated wafer to fall back to the heating disc, and carrying out the deposition of a second layer of thin film. According to the invention, the risk of process pollution caused by the fact that the wafer is moved out of the reaction cavity by means of an external transmission unit can be avoided, and meanwhile, the uniformity of the film thickness in the laminated deposition process can be improved, so that the film thickness is accurately controlled.

The purpose of the present invention is to propose a bar sharpening machine, comprising a transport device including a rotating wheel, a first supporting tray, a second supporting tray, a material pressing assembly and a material receiving plate, which can transport the bar; a sharpening device including a fixed plate, a first adjusting plate, a second adjusting plate, a fourth motor and a cutter disc, which can sharpen the head of the bar; a forming device including a mounting frame, a second motor, a third motor, a first saw blade and a second saw blade, which can round the tail of the bar and open a groove.

The utility model relates to the technical field of automobile brake pipes, and discloses a pneumatic plug device for an automobile brake hose, which comprises a device body, a U-shaped frame fixedly connected to the top of the device body, a positioning assembly arranged on the inner side of the U-shaped frame, a guide rail assembly arranged in the device body, and a connector assembly detachably connected to the top of the guide rail assembly. The utility model has the beneficial effects that the electric cylinder is used for pressing and assembling the joint hose, the manpower is reduced, the efficiency is improved, and the guide rail assembly ensures that the sleeve is accurately inserted into the hose, so that not only is the concentricity of the hose and the joint ensured, but also the risk that the hose is abraded is reduced, and the production efficiency is improved. By means of the technical scheme, pipe insertion becomes simple and easy, tools can be replaced for different products through the dismounting plate, the products are accurately clamped through the gap between the first hose clamping tool and the second hose clamping tool, it is guaranteed that the products cannot be damaged in the working process through chamfers, and the problem that pipe insertion wastes time and labor is perfectly solved.