96results about How to "Lower skill requirements" patented technology

The invention relates to the technical field of metal heat treatment, in particular to a high-temperature alloy strip automatic switching water-cooling annealing device and an annealing method thereof.The high-temperature alloy strip automatic switching water-cooling annealing device comprises a main body frame, a sliding seat is slidably arranged on the main body frame, a mounting seat and an adjusting seat are slidably arranged on the sliding seat, the mounting seat is fixed to the sliding seat, and the adjusting seat is slidably arranged on the sliding seat; a bearing table used for containing strips is arranged on the mounting base, a spring is connected between the mounting base and the spring, two lead screws are rotationally arranged on the main body frame, the lead screws penetrate through the sliding base, the mounting base and the adjusting base and are in threaded connection with the adjusting base, a top frame is arranged on the main body frame, and a water supply pipe is arranged on the main body frame. The single driving source is used for sequentially and automatically completing strip conveying positioning and gradual flow adjustment from small to large, shock cooling is effectively avoided, the annealing quality and uniformity are improved, the structure is compact, the automation degree is high, and operation is easy and convenient.

This utility model relates to the field of capacitor electrolyte treatment technology and discloses a capacitor electrolyte purification and impurity removal device, including a storage tank for storing capacitor electrolyte, a flexible tube connected to the bottom of the storage tank, a tank body fixed to one side of the storage tank, and a tank cover connected to the top of the tank body by bolts; a stirring assembly for stirring the electrolyte is provided on the top of the storage tank; a filter screen is provided inside the tank body for removing impurities from the electrolyte. By setting the stirring assembly on the top of the storage tank, the rotating shaft is driven by a motor to drive the stirring blades to fully stir the electrolyte, effectively preventing the electrolyte from settling or separating, thereby improving the uniformity of the electrolyte. By setting the filter screen inside the tank body, after the electrolyte enters the tank body, it passes through the filter screen for impurity removal. Impurities are trapped on the filter screen, and the clean electrolyte is discharged through the outlet pipe, effectively removing solid impurities from the electrolyte and improving the purity of the electrolyte.

This application discloses a tool setting method and tool setting fixture for a vertical slotting machine, belonging to the technical field of tool setting devices. To address the problems of low tool setting efficiency and poor accuracy in existing vertical slotting machines, the tool setting fixture includes a central support plate. A triangular jaw is installed at the bottom of the central support plate. The tool setting fixture is installed at the inner hole of the workpiece to be processed via the triangular jaw. A support base for fixing a measuring device is installed on the front side of the central support plate. A tool setting sample block is detachably connected to the support base. The operator determines the tool setting position by cooperating with the measuring device and the tool setting sample block. This application is mainly used as a tool setting device for CNC vertical slotting machines.

The invention discloses an automatic fixed-axis manual multi-purpose tapping workpiece, and belongs to the technical field of tapping workpieces, the automatic fixed-axis manual multi-purpose tapping workpiece comprises a mounting seat, the mounting seat comprises a fixed sleeve, a centering spiral disc is rotatably connected in the fixed sleeve, and the outer circle of the centering spiral disc is in clearance fit with the inner ring of the fixed sleeve; the bottom of the centering spiral disc is fixedly connected with a connecting cylinder in an interference fit mode. By arranging the mounting base and the centering sleeve, a screw tap or a threading die penetrates through the connecting sliding cylinder, an operator screws the locking sleeve, the arc faces of the three pressing plates make contact with and press the screw tap or the threading die, it is further guaranteed that the mounting base, the centering sleeve and the screw tap or the threading die are coaxially arranged, and the coaxiality of machined threads and machined holes or shafts is guaranteed; according to the manual tapping device, the situation that tapping is inclined, the screw tap is broken and the threading die is broken is avoided, manual tapping precision is guaranteed, the requirement for skills is lowered, screw taps with different thread diameters and threading dies with different diameter series can be installed, and applicability is high.

The utility model discloses a kind of metal door panel is in the center of corner forming machine on forming press plate positioning mechanism, belong to sheet metal processing equipment technical field. Including rack, material pressing device is equipped in the upper portion of rack, forming press plate positioning device is driven and connected below material pressing device, two guide devices are symmetrically set in the front end of rack, triangular forming mould is equipped below forming press plate positioning device, the forming press plate positioning device includes forming press plate and the adjustable positioning plate of both sides thereof. The utility model drives forming press plate positioning device to go down along guide device by material pressing device, workpiece hem is automatically tightened and is close to two sides of triangular mould in pressing process using two sides positioning plate, to realize workpiece automatic centering and accurate positioning. The mechanism structure is reasonable, positioning is accurate and reliable, effectively solve the deviation, wrinkle and deformation problem in workpiece corner forming, significantly improve processing quality and production efficiency, especially suitable for batch sheet metal workpiece high-precision machining.

The utility model discloses an air tightness detection device for a water pump of a dish-washing machine. The stand columns are vertically arranged on the base; the upper pressing plate is connected to the top of the stand column; the sealing seat is mounted on the base, the sealing seat is provided with a detection cavity for accommodating a pump body of a water pump to be detected, and the detection cavity is communicated with a vacuum interface; the sealing ring is arranged on the sealing seat, and the sealing ring is suitable for forming airtight sealing with the water pump body placed in the detection cavity; and the downward pressing mechanism is mounted on the upper pressing plate. The beneficial effects of the utility model are that the special test tool provided by the utility model optimizes the sealing / pressurizing mode, significantly shortens the airtightness test time of a single water pump, does not need to be installed on the whole dish-washing machine, simplifies the test process, and greatly improves the overall detection efficiency on a production line.

The application provides a monocular camera offline calibration method, system, storage medium and computer, which comprises the following steps: reading the part information of the monocular camera on the vehicle to be calibrated, correcting the part information, and entering the expansion mode if the part information is corrected; writing the vehicle information of the vehicle to be calibrated in the expansion mode, obtaining the corresponding control sequence based on the vehicle information, starting the calibration program of the vehicle to be calibrated by using the control sequence, and obtaining the corresponding calibration result; judging the calibration result, if the calibration result is not equal to the first calibration threshold, judging whether the calibration result is equal to the second calibration threshold; if the calibration result is not equal to the second calibration threshold, obtaining the calibration times of the calibration result; if the calibration times of the calibration result are not greater than the calibration times threshold, recalibrating the vehicle to be calibrated by using the calibration program until the calibration result is equal to the first calibration threshold, so that the vehicle to be calibrated is successfully calibrated.

The utility model relates to the technical field of plastic pelletizing, specifically relates to a plastic pelletizing device for plastic particle production. The utility model discloses a screw extruder shell, the one side fixed mounting of screw extruder shell has the discharge tray, the annular array of discharge tray is opened and is equipped with a plurality of discharge holes. The utility model, through the reverse rotation threaded rod drive sleeve ring far from the discharge tray, can remove the inclined plane locking force between the movable wedge and the fixed wedge, and makes the sleeve ring separate from the base plate periphery, then the base plate can be easily taken out from the embedded groove, the overall disassembly of the old tool assembly is completed, when installing, only need to position the new base plate to the embedded groove with the magnetic attraction, the forward rotation threaded rod pushes the sleeve ring forward, can press all the wedge simultaneously, complete the overall locking, the structure simplifies the tool changing process, changes the time from the traditional bolt to dozens of minutes needed to disassemble one by one to several minutes, improves the equipment utilization and production continuity.

The application discloses a method for removing electroplating process wires by laser, comprising the following steps: step (1), according to the state of the existing process wires after electroplating, designing reasonable half-cut laser processing path and hot-pressing laser processing path; step (2), according to the half-cut laser path, cutting the metal layer of the process wires by laser, and basically not damaging the underlying substrate; step (3), according to the hot-pressing laser processing path, using the thermal effect of laser to heat the process wires, and then reducing the adhesion between the process wires and the substrate, and meanwhile, a certain positive pressure blowing or / and negative pressure suction is used to make the process wires separate from the substrate. The method does not need traditional manual picking to remove the process wires, does not need secondary etching, has no protective material coating process, and can adopt laser direct stripping to remove the process wires; the method is accurate in positioning, has no burr on the edge, has no side etching, is good in consistency, is high in processing efficiency, is low in cost, and is simple in operation, and is low in skill requirement for employees.

The application discloses a steel bar strength detection equipment, and belongs to the technical field of building material detection, which comprises a workbench, and a positioning hole is formed in the upper surface of the workbench; the steel bar is clamped and fixed through a lower clamping mechanism and an upper clamping mechanism, so that the steel bar is prevented from slipping during detection, the effectiveness of the applied tension is ensured, the movable plate is driven to move up and down through the extension and retraction of an electric telescopic rod, then the upper clamping mechanism is used to apply tension to the steel bar, the movable plate and the workbench are connected through a tension sensor and a tension detection rope, the tension applied to the steel bar can be monitored in real time, an infrared range finder is used to measure the displacement of the movable plate, so that the stretching amount of the steel bar is obtained, and a camera observation mechanism is used to observe the morphological change of the steel bar during stretching; the detection equipment has a relatively compact structure, does not need a laboratory environment, can be carried to a construction site, and is integrated with control and data display through a controller, so that the operation process is simplified, and the skill requirement for an operator is reduced.

This utility model discloses a reducer device for emulsion drilling rigs, including a first mounting shell, a second mounting shell disposed on the first mounting shell, and fixing bolts disposed between the first and second mounting shells. It enables rapid fixing and disassembly of the reducer body without disassembling numerous related components, significantly simplifying the replacement process, shortening downtime, and reducing the impact on construction progress. In terms of maintenance, the ease of assembly and disassembly reduces reliance on confined operating spaces and the risk of secondary damage due to improper operation. Regarding costs, it reduces labor hours and labor costs; reduces wear and tear on surrounding components from repeated disassembly, lowering the probability of unplanned replacements; and eliminates the need to stock complete units, reducing inventory costs. Furthermore, the flexible fixing method facilitates adaptation to equipment upgrade needs without requiring modification or replacement of the entire machine, further reducing costs, making it particularly suitable for scenarios such as underground mining.

The present application relates to the technical field of intelligent control of industrial robots, in particular to a constant force polishing dynamic parameter self-tuning method. The method comprises the following steps: 1) when the robot moves along a predetermined trajectory, real-time acquisition of multi-modal sensing data and extraction of data features; 2) taking the extracted multi-modal feature vector as input, predicting the bottom robot force controller parameters through a pre-trained deep learning model; 3) the robot force controller uses the new parameters and contact force feedback signals, generates joint torque instructions through impedance control algorithm, and drives the industrial robot to perform polishing work. Through visual foresight, the system can predict the working condition change in advance and adjust the parameters in advance, greatly reducing the force overshoot and oscillation, and realizing smooth transition.

This utility model discloses an automatic feeding and sewing device, including a worktable, a moving component, a vision module, and a control module. The worktable has a working plane, and a three-axis moving device and a sewing machine are installed on the worktable. The moving component is rotatably mounted on the three-axis moving device. The vision module is located above the working plane. The control module is electrically connected to the vision module and the three-axis moving device. The vision module collects the position information of the material on the working plane, and the control module processes the information to precisely drive the three-axis moving device, so that the rotatable moving component can pick up the material according to the material's own rotation angle and straighten it. This design directly solves the problem of traditional equipment requiring manual adjustment of the material's posture. Moreover, the three-axis moving device can drive the outer periphery of the material to continuously pass through the overlock sewing machine to perform sewing operations on the outer periphery of the material, which significantly improves processing efficiency and is especially suitable for mass production of fabrics to shorten the production cycle.

The utility model discloses an LED display screen module capable of being rapidly assembled. The LED display screen module capable of being rapidly assembled comprises a display screen and a heat dissipation piece. The display screen is provided with a fixing plate and a mounting seat, the fixing plate is provided with a first magnetic attraction piece, a second magnetic attraction piece and a mounting hole mounting bolt, and the heat dissipation piece is provided with a heat dissipation opening and a heat dissipation pipeline; the fixing plates are located on the two sides of the display screen, the mounting bases are located on the rear side wall of the display screen and close to the four corners, the first magnetic attraction piece and the second magnetic attraction piece are located on the fixing plates on the different sides respectively, and the mounting hole is located in the center of the fixing plate on one side of the first magnetic attraction piece. And the mounting bolt is positioned at the central position of the fixing plate on one side of the second magnetic attraction piece. The structure design is reasonable, and the magnetic attraction piece and the installation assembly are convenient to quickly assemble; relevant parts of the mounting seat are combined and mounted flexibly; the heat dissipation piece and the heat dissipation structure effectively dissipate heat; the data interface is arranged on the side wall of the heat dissipation piece, and data transmission and wiring are facilitated.

The application discloses a high-precision quick-switching continuous sandwich plate production line, which comprises a lower plate uncoiling and profiling system, an upper plate uncoiling and profiling system, an upper steel plate transition roller way, a double-track pressure curing machine, a lower roller way, a tracking cutting saw, a cooling bed, a stacking machine, a packing machine, a first mineral wool supply system and a second mineral wool supply system, and the core of the application is that the lower plate uncoiling and profiling system and the upper plate uncoiling and profiling system are installed by exchanging positions, the lower plate uncoiling and profiling system is arranged at the front end of the upper plate uncoiling and profiling system, and part of the upper steel plate transition roller way and the lower profiling machine transverse moving system are cancelled, so that the lower plate uncoiling and profiling system is not interfered by the upper steel plate transition roller way, the plate type can be directly switched by using a crown block to hoist and switch the roller frame assembly of the lower profiling machine, the step of moving the lower profiling machine out of the line to switch the specifications is omitted, the investment cost of the production line is greatly reduced, the use area of the workshop is saved, and the switching of the specifications is more accurate and quick.

The application relates to the technical field of aluminum alloy ingot melting furnaces, in particular to an aluminum alloy ingot melting furnace capable of quantitative discharging, which comprises a melting furnace, a mounting frame, a driving mechanism and a discharging mechanism. The mounting frame provides support above the melting furnace, the driving mechanism drives the melting furnace to swing, and the discharging mechanism comprises a communication shell and a pushing groove frame. The communication shell is internally provided with a communication cavity, and the pushing groove frame is arranged in the communication cavity. The discharging mechanism realizes quantitative discharging through gear transmission and the like, solves the problem of inaccurate discharging of the existing equipment, improves production stability and efficiency, and reduces cost and labor intensity.

The present application belongs to the technical field of building engineering, and particularly relates to a lug plate device for a flower basket type cantilever steel beam, which comprises: a main component, which is sleeved on the flower basket type cantilever steel beam; a lug plate, which is fixedly connected above the main component; and at least one adjusting and fastening mechanism, which is arranged on the main component and is used for detachably and adjustably fixing the main component and the lug plate on the steel beam in the length direction of the steel beam by applying clamping force to the steel beam. The present application solves the position conflict adjustment problem: when the lug plate position conflicts with a vertical rod or the like, the lug plate can be easily moved and adjusted in position by loosening the bolts without cutting and re-welding, and the operation is extremely convenient.

The invention relates to a method for improving the dustpan filling rate of a bucket elevator. The method comprises the steps that dustpan filling images and equipment data are obtained in real time through a sensor network; transmitting the data to an edge AI calculation unit, performing millisecond-level reasoning by using a lightweight convolutional neural network model, estimating a filling rate in real time and identifying a material type; based on a reasoning result, dynamically and cooperatively adjusting operation parameters, including changing the geometric volume of the deformable intelligent winnowing pan through a micro driving mechanism, adjusting the speed of the elevator and controlling a feeding auxiliary device, and continuously optimizing decision logic of the system by a digital twin model, according to the model, an optimization strategy set is generated in advance through discrete element simulation and a Bayesian optimization algorithm, and the system has a maintenance function of predicting performance degradation by analyzing current and vibration data and can cooperate with upstream and downstream equipment to realize global energy efficiency optimization; according to the scheme, the problem that the filling rate of a traditional elevator is unstable due to variable materials and fixed bucket types is solved, and self-adaptive precise control is achieved.

The utility model discloses a quick replacement device for a carbon fiber fishing rod guide ring, and particularly relates to the field of fishing rod guide rings, which comprises a carbon fiber rod body, a fixing sleeve is sleeved outside the carbon fiber rod body, a bearing ring is fixedly connected to the outer surface of the carbon fiber rod body, the outer surface of the bearing ring is fixedly connected with an inner ring of the fixing sleeve, and the outer ring of the fixing sleeve is fixedly connected with a bearing sleeve. The outer surface of the fixing sleeve is fixedly connected with a positioning sleeve, a guide ring piece is arranged above the carbon fiber rod body, an arc-shaped block is arranged below the guide ring piece, and the outer surface of the arc-shaped block is fixedly connected with an arc-shaped positioning plate. By pulling the guide ring piece, the sliding clamping block can be separated from the clamping groove, locking of the arc-shaped positioning plate can be relieved easily, the guide ring piece can be detached conveniently, in addition, when a new guide ring piece is installed, after the arc-shaped positioning plate is aligned with the positioning sleeve to be inserted, under the elastic force effect of the spring, the guide ring piece can be detached conveniently. The sliding clamping blocks can be automatically clamped into the clamping grooves to achieve primary fixing, and the installation speed is increased.

The invention provides a spliced tower drum and a manufacturing method thereof, and relates to the technical field of installation. The spliced tower drum comprises at least two tower drum modules, the first side of each tower drum module is provided with a first connecting structure, each first connecting structure comprises an elastic buckle, and the second side of each tower drum module is provided with a second connecting structure; the connecting device comprises a first part and a second part, the first part comprises a clamping groove matched with the elastic buckle, the elastic buckle is connected with the clamping groove in a buckled mode so that the first part can be connected with the first connecting structure, and the second part is detachably connected with the second connecting structure; and every two adjacent tower drum modules are connected with the first connecting structures and the second connecting structures of the two tower drum modules through the connecting devices so as to be locked and connected.

The utility model relates to the technical field of engine parts testing, specifically is a valve guide rod surface friction and wear testing machine, including frame and fixed test bench on the frame, be provided with the guide seat on the frame, the guide seat inside slide joint has the cylinder type sliding block, the cylinder type sliding block drives the horizontal reciprocating movement in the guide seat through the first drive mechanism, the end of cylinder type sliding block is provided with the centering clamping mechanism for the valve guide rod circumferential clamping and coaxial positioning, the centering clamping mechanism includes the mandrel rotationally installed in the cylinder type sliding block inside, the mandrel is driven rotation through the second drive mechanism, is provided with the taper external thread head on the mandrel, the utility model discloses through the centering clamping mechanism design, has realized the quick clamping of valve guide rod sample, automatic centering and nondestructive clamping, effectively solved the technical problem that the traditional clamping mode exists and is poor in the centering accuracy, the operation is complicated, and the general property is insufficient, improved test efficiency and accuracy significantly.

The application discloses a kind of self-adaptive cutting processes for preventing silicon rod hidden crack, including the following steps: silicon rod pretreatment, cutting equipment debugging and initialization, multidimensional real-time monitoring, parameter adaptive adjustment, cutting process closed-loop control, cutting completion and post-processing.The application detects the whole dimension through the silicon rod pretreatment stage, multidimensional real-time monitoring the key parameters such as internal stress and cutting line state of silicon rod, dynamically adjusts the cutting parameters through adaptive algorithm, realizes the accurate control of cutting stress, avoids the hidden crack caused by excessive stress and parameter mismatch from the root;According to the differences of silicon rod characteristics, the state changes in the cutting process, automatically adjust the cutting parameters, with strong adaptive ability, wide adaptability, improve the cutting efficiency and silicon rod cutting yield;Through the filing of cutting data and the construction of database, realize the continuous optimization of process, with high degree of automation, reduce labor cost.

The application relates to a cigarette packet extracting device and method. The cigarette packet extracting device comprises a first mounting bracket, a driving mechanism, a crank, a connecting rod and an executing mechanism. The first mounting bracket is used for mounting on the rack of a cigarette packet extracting conveying belt. The driving mechanism is mounted on the first mounting bracket. The driving mechanism is in driving connection with the crank, and the connecting rod is in driving connection with the crank. The executing mechanism comprises a hook hand which is in driving connection with the connecting rod so that the driving mechanism drives the hook hand to reciprocate through the crank and the connecting rod. The cigarette packet extracting device and method have the advantages of high stability, long service life and high machining precision.

The application relates to the technical field of blood sampling devices for large animals, and discloses a disposable combined blood sampling device for large animals, which comprises a large-capacity storage bag, a sheet clamp, a first funnel, a sample storage bag, a male luer connector, a nine-way connector, a second funnel, a large-capacity blood sampling bag and a blood sampling assembly. The device is designed in an integrated mode, and the operation convenience is obviously improved; the multiple large-capacity blood sampling bags are connected in parallel through the nine-way connector and are connected to the large-capacity storage bag through a flow guide pipe, so that the blood sampling, filtering and mixing processes are completed at one time in a closed system, and the blood sampling bag does not need to be frequently replaced or assisted by external tools; in addition, the blood sampling assembly optimizes the blood flow path in combination with the second funnel and a buffer pipe, and can realize rapid and uniform blood sampling in cooperation with a peristaltic pump, and the efficiency is obviously improved compared with a traditional natural gravity flow mode.

The invention relates to the technical field of laser welding and discloses laser welding equipment and a welding technology.The laser welding equipment comprises a supporting base, a supporting positioning mechanism is connected to the top end of the supporting base, an auxiliary positioning mechanism and an auxiliary butt joint mechanism are connected to one end of the top of the supporting positioning mechanism, and the auxiliary positioning mechanism comprises two supporting positioning frames; according to the auxiliary positioning mechanism, through the positioning lead screw, the movable base, the clamping frame and other assemblies in the auxiliary positioning mechanism, precise positioning and stable clamping of a strip-shaped workpiece are achieved, the precision problem of manual butt joint is avoided, the working efficiency is improved, and the working efficiency is improved. The butt joint precision of the workpieces before welding is obviously improved; a driving wheel and an anti-skid ring in the auxiliary butt joint mechanism are used for driving the strip-shaped workpieces to move slowly, stable butt joint of the two strip-shaped workpieces is achieved, position deviation and angle deviation are reduced, and guarantee is provided for high-quality welding; and the long-strip-shaped workpiece is stably controlled during laser welding.

The application relates to a fixing structure, a rack comprising a first positioning plate and a second positioning plate, a gearbox comprising a first mounting base and a second mounting base, and an eccentric sleeve used for eliminating deviation between the first mounting base and the first positioning plate when the gearbox is mounted on the rack, a second locking cavity penetrating through the second mounting base, a first locking cavity penetrating through the first mounting base, a second insertion hole penetrating through the second positioning plate, a first insertion hole penetrating through the first positioning plate, a linkage cavity axially arranged in the eccentric sleeve, and an eccentric distance between the linkage cavity and the eccentric sleeve. The application allows the rack and the gearbox to have slight manufacturing errors, the eccentric sleeve can compensate for the errors, high machining precision of parts is not required, the manufacturing difficulty and the production cost of the parts are reduced, and the production efficiency is improved.

The invention discloses a chick embryo injection area searching method and system based on image recognition. The method comprises the following steps: constructing a chick embryo injection searching device; based on the chick embryo injection searching device, a mechanical coordinate system and a clamp coordinate system are constructed, and the pose of the egg body clamp is obtained by considering the influence of the motion module on the pose change of the egg body clamp; the initial egg body posture is obtained, egg body opening adjustment, injection point adjustment and injection direction adjustment are conducted on the basis of the posture of the egg body clamp, and the optimal injection posture of the egg body is obtained. According to the invention, searching of embryo injection points and adjustment of optimal injection poses can be automatically realized, and the injection efficiency is improved. The chick embryo injection area searching method and system based on image recognition can be widely applied to the technical field of assisted reproduction.

The utility model discloses a kind of aluminum veneer mounting frame assembly structures, including vertical strut, diagonal strut, corner code and connecting piece, vertical strut is respectively erected in horizontal direction and vertical direction, forms frame, and diagonal strut is installed at frame diagonal, diagonal strut both ends are connected with vertical strut, diagonal strut is connected and fixed with corner code by connecting piece, wherein corner code includes right angle code and bevel code.The connecting mode of the utility model does not need welding, simple and quick operation, reduce the requirement to worker skill, avoid the security risk and potential damage to aluminum veneer brought by welding simultaneously, and by setting diagonal support strut piece in frame middle, the in-plane and out-of-plane stability of frame is enhanced.

The present application relates to the technical field of aero-engine assembly, and particularly relates to a locking tool and method for an annular locking piece in a fairing assembly. The locking tool comprises a deformation punch and a locking punch. Four deforming blocks are uniformly distributed on the lower end surface of the deformation punch in a ring shape. A guide slope is arranged on each deforming block. The guide slopes on the deforming blocks are configured to force the side wall of the annular locking piece to synchronously generate a pre-dimple. Two opposite deforming blocks are used to generate a radially inward pre-dimple, and the other two opposite deforming blocks are used to generate a radially outward pre-dimple. Four locking blocks are uniformly distributed on the lower end surface of the locking punch in a ring shape. A guide slope is also arranged on each locking block. The guide slopes on the locking blocks are configured to force the pre-dimple to deform to form a locking dimple. Two opposite locking blocks are used to shape the radially inward pre-dimple, and the other two opposite locking blocks are used to shape the radially outward pre-dimple.