88 results about "Surface integrity" patented technology

The invention relates to a top-cover-free rectangular concrete body inner mold demolding device and demolding method.According to the top-cover-free rectangular concrete body inner mold demolding device, through innovative structural design, a rectangular inner mold is divided into two angle molds and two L-shaped molds, and a track extending by a specific angle (45 degrees in the horizontal direction) and an intermittent driving device are matched. During demolding, the intermittent driving device can accurately drive the two angle molds to synchronously slide inwards firstly, the contact area and friction force between the inner mold and a concrete body are effectively reduced, then the two L-shaped molds are driven to synchronously slide inwards, and the whole demolding process is completed. Compared with a traditional demolding mode, the demolding efficiency is greatly improved, and the demolding time is shortened; by the adoption of the gradual demolding mode, direct beating and violent disassembly of the mold and the concrete body are avoided, the risk that the inner mold and the concrete body are damaged is effectively reduced, the surface integrity and the internal structural strength of the concrete body are guaranteed, the service life of the inner mold is prolonged, and the production cost is reduced.

The application relates to the technical field of steel metallurgy, and discloses a rolling process for improving the surface quality of C70S6 non-adjustable steel, which comprises the following steps: S1, a heating process; S2, a descaling process; S3, a rolling process; S4, a cooling process; and S5, a finishing process.The process can significantly reduce thermal stress cracks, the temperature uniformity of the casting blank from the surface to the core is improved through a three-stage heating mode and precise heat preservation control, the thermal stress is effectively released, the anti-collision and spacing control during charging are combined, local overheating or overcooling is avoided, the occurrence rate of surface micro-cracks and corner transverse cracks is reduced by more than 80%, and the surface integrity of the casting blank is greatly improved.The process can completely solve the iron oxide scale defects, the double high-pressure water descaling process after the furnace and before the medium rolling is adopted, the optimized combination of the descaling pressure and the water flow speed ensures that the residual area of the iron oxide scale is less than or equal to 3%, the iron oxide scale pressing-in defects are completely eliminated, and the surface cleanliness of the steel is significantly improved, thereby providing a high-quality base for subsequent processing.

The application provides a processing parameter optimization method based on a GRA-CRITIC-TOPSIS method and processing surface integrity multi-indexes, and belongs to the technical field of high-efficiency precision processing. In view of the problems that the influence of processing parameters on workpiece surface integrity multi-indexes is complex in difficult-to-machine material milling processing, and the expected results of various indexes are contradictory, the grey correlation analysis method (GRA), the CRITIC objective weighting method and the ideal point method (TOPSIS) are organically combined, and a more scientific and comprehensive multi-objective processing parameter comprehensive optimization model is constructed. The method introduces the CRITIC objective weighting, the weight calculation is more reasonable, the index information overlap can be effectively avoided, and the optimization result has higher engineering reliability.

The application relates to a bending and overturning mechanism, which comprises a fixed die, a movable die capable of moving towards the fixed die, a punch arranged on the movable die, a shaping mechanism arranged on the side close to the movable die of the fixed die, a fixed seat, two symmetrically arranged sliding blocks in a curved sliding groove and corresponding elastic members, the sliding block has a material bearing plane, the material bearing planes of the two sliding blocks are coplanar to form a placing plane in a non-working state, and the punch pushes the metal plate to bend and drives the sliding blocks to move along the curved groove in a working state. The bending and overturning mechanism synchronously deforms the sliding blocks with the metal plate due to the above-mentioned structural design, effectively solves the plate scratch problem in traditional bending, and improves the forming quality and surface integrity.

This invention discloses a precision grinding process for machining the shaft of a swimming pool pump motor, relating to the field of shaft precision grinding technology. The process includes: Step 1: Establishing an incident window using a coherent jet nozzle, allowing the jet to penetrate the air gap into the grinding zone, first wetting and then introducing the load, and recording the incident window, jet posture, and dressing rhythm as working condition metadata; Step 2: After precision grinding, according to the material type, magnetic noise is used for ferromagnetic steel and X-ray diffraction is used for austenitic steel to obtain thermal damage and residual stress, and combining this with cleanliness to generate a surface integrity label and bind it to the working condition metadata; Step 3: Performing deionized ultrasonic cleaning and rinsing according to the label to remove chloride salts and free iron, rebuilding the passivation film according to specifications using chemical passivation, controlled drying, and clean sealing; Step 4: Under the premise of qualified chemical condition, performing isotropic ultra-finishing and low-plasticity rolling on the sealed working zone to form surface compressive stress and maintain geometric tolerances, quickly indicating inspection and writing back the label.

The invention relates to rotary cutting disc cutting equipment and technology for bathroom towel rack production, and belongs to the technical field of cutting equipment.The equipment comprises a machine base, a guide rail frame, a clamping assembly I, a clamping assembly II, a supporting arm, a cutting mechanism, an electric push rod and a supporting assembly; according to the pipe cutting device, force is evenly applied through alternate clamping and hydraulic linkage, the pipe is prevented from being deformed and scratched, a V-shaped positioning groove of the supporting assembly is matched with a clamping plate, the clamping assembly I is used for pushing the pipe to move in the clamping assembly II, and the supporting assembly is arranged below the cutting mechanism and used for clamping the pipe at the cutting end and driving the pipe to incline when the pipe is cut off. During cutting, the pipe is guided to incline, a blade is prevented from being clamped and blocked, meanwhile, an internal cleaning assembly is linked with feeding, cutting slag is synchronously discharged, the inner wall of the pipe is supported, the equipment is high in cutting precision, the surface integrity of the pipe is good, and the service life of a cutter is long.

The application provides an adjustable wire cutting machining device and a data processing method thereof, and relates to the field of wire cutting machining.The adjustable wire cutting machining device comprises a base, a machining table is fixed at the top of the front end of the base, a protection frame is arranged at the outer circle of the machining table and is fixed at the top of the base, and a power control cabinet is arranged at the right side of the protection frame.Through multi-stage data collection of primary, secondary, tertiary and standby collection modules and in combination with data processing of a 3D modeling end, omnibearing monitoring of the machining process is realized, the "difference degree" of each stage is calculated by comparing the actually measured data with the theoretical model data, and iterative and forward-looking process parameter compensation is carried out by using a correction module.This closed-loop self-adaptive control can dynamically correct the cutting path, energy input and cooling condition, effectively compensate the size deviation and thermal deformation generated in the machining process, and thus significantly improve the size precision, geometric shape precision and surface integrity of the final workpiece.

The application discloses an ultrasonic wave and micro-bubble coordinated electrochemical polishing device and polishing method. The polishing device comprises an electrochemical polishing cabin; a workbench for placing a workpiece and a clamp for fixing the workpiece on the workbench are arranged in the electrochemical polishing cabin; the electrochemical polishing cabin is provided with an electrolyte circulating loop, the outlet of the electrolyte circulating loop is communicated with the inlet through the circulating loop, a micro-bubble generating device and a supply pump are arranged on the electrolyte circulating loop; the polishing device further comprises a pressure booster for pressurizing the electrochemical polishing cabin, a bubble monitoring device for monitoring the micro-bubble concentration in the electrolyte and an ultrasonic wave generating device; the ultrasonic wave probe of the ultrasonic wave generating device and the workpiece are connected with a power supply. The polishing method can simultaneously consider high polishing efficiency, high consistency and excellent surface integrity of the workpiece.

The application relates to the technical field of furniture processing, in particular to a furniture frame bending device and method, which comprises a workbench, a bending device and an extrusion plate are arranged on the workbench, an auxiliary wheel is arranged on the top of the workbench, an auxiliary moving mechanism and a displacement compensation mechanism are further arranged on the workbench, the auxiliary moving mechanism is used for full-length limiting constraint of the furniture frame, and the displacement compensation mechanism is used for offsetting material displacement deviation in the bending process. The furniture frame bending device and method, the folding wing plate of the auxiliary moving mechanism is matched with the rotating wheel, the full-length limiting and uniform compression of the furniture frame are realized, the spring one is matched with the frames with different thicknesses and materials in the elastic action, the displacement caused by single constraint is avoided, the rotating wheel reduces the friction between the frame and the device, effectively prevents the horizontal deviation and surface scratches during the bending, and improves the surface integrity and the reference consistency of the frame processing.

The invention discloses a welding assisting device for an assembly type prefabricated steel structure, and particularly relates to the technical field of welding, the welding assisting device comprises a machine table, clamping plates for clamping a steel beam are fixedly installed at the upper end of the machine table in a rectangular distribution mode, and a welding assisting device attached to the inner wall of the steel beam is arranged in the middle of an inner cavity of a shell; an electric capstan and plasma welding equipment are arranged in the control cabinet, and traction cables distributed in a rectangular shape are arranged on the front side and the rear side of an inner cavity of the shell correspondingly. Precise internal and external clamping of the wing plate is achieved through cooperation of the wing plate positioning structure and the wing plate clamping structure, welding displacement is prevented, the relative position of the wing plate and the main plate is precisely calibrated through cooperation of the positioning driving structure and the cross beam positioning structure, the position precision is guaranteed, and all core structures work cooperatively to improve the welding quality and reduce errors; and meanwhile, the device adapts to H-shaped steel beams of different specifications, the universality of the device is greatly improved, the workpiece surface integrity is effectively protected, and whole-course stable and efficient welding auxiliary operation is achieved.

The application relates to the technical field of aluminum plate processing, and discloses a leveling device for aluminum plate processing, which comprises a bottom plate, a supporting plate fixedly connected to the top of the bottom plate, a motor installed on one side of the supporting plate, a rotating disc fixedly connected to the output end of the motor, a fixing shaft fixedly connected to one side of the rotating disc, a positioning shaft fixedly connected to one side of the supporting plate, a rotating rod rotatably connected to the outside of the positioning shaft, a guide groove formed in the inside of the rotating rod, a sliding groove formed in the inside of the rotating rod, a limiting assembly arranged on one side of the fixing shaft, a sliding shaft slidably connected to the inside of the rotating rod, and a guide frame fixedly connected to one side of the supporting plate. In the application, the aluminum plate can be effectively leveled, the processing quality is significantly improved, in the leveling and buffering assembly, the buffering spring can automatically adjust the leveling intensity, the buffering pad avoids the surface damage of the aluminum plate, ensures the uniformity of leveling, effectively improves the leveling degree and surface integrity of the aluminum plate, and guarantees the processing quality.

The application relates to a high-temperature high-frequency fretting fatigue life prediction method of surface integrity evolution, and belongs to the field of fretting fatigue life prediction methods. A fretting contact simulation model of a fretting fatigue sample with a real surface topography is established, high-temperature mechanical property parameters and surface residual stress stable values of the fretting fatigue sample are introduced, surface topography evolution in the fretting contact simulation process is realized by combining a surface hardness evolution law, a wear rate evolution model and a self-adaptive grid technology, a high-frequency vibration influence factor is introduced to correct a damage parameter model, and the fretting fatigue life corresponding to the damage parameter and the fretting fatigue damage at the current iteration step are calculated. The damage threshold is used as a criterion for iteration termination, surface topography evolution is used as a damage transmission medium to perform step-by-step iteration, and the total fretting fatigue life is obtained. The application can effectively improve the accuracy and engineering applicability of the fretting fatigue life prediction, and has good popularization and application value.

The application provides a cutting method for disc surface integrity test samples, first determines cutting principles under different structure characteristics and specific processing methods, then determines the cutting position and direction of specific structure characteristics according to the cutting principles, finally determines the cutting method, and labels the cutting sample according to a unified naming rule. The position which has a key influence on the product use performance in the manufacturing process is selected and cut through the method, so that the surface integrity detection is carried out targetedly, the application can be applied to the cutting of various disc surface integrity test samples, has strong universality and practicality, and has huge economic effect and social benefit.

The invention discloses a profiling vibration polishing method and device for an aero-engine tenon connection structure, and belongs to the technical field of precision machining. The device comprises a driving and vibrating system, a profiling polishing execution system, a precise force control system and a polishing solution circulating system. The core of the method is that a profiling polishing tool matched with the tenon structure profile in a negative shape is adopted, and a flexible polishing pad is attached to the surface; constant pressure is applied to the tool through a precise force control system; meanwhile, the driving system drives the tool to perform high-frequency micro-amplitude linear reciprocating vibration; under the participation of free abrasive particles in the polishing solution, uniform, low-damage and high-efficiency polishing of the tenon tooth / mortise complex curved surface is realized. The problems of thermal damage, large residual stress, limited surface quality and the like caused by a traditional grinding / broaching process are effectively solved, the surface integrity and fatigue performance of the tenon structure can be remarkably improved, the process flexibility is good, and the method is suitable for nickel-based high-temperature alloy and other materials difficult to machine.

The application discloses an automatic welding production line, and relates to the technical field of packaging material welding, which comprises a supporting machine, a welding device and a conveying assembly, a moving assembly is arranged on the top of the supporting machine, and a supporting assembly is arranged on the outer wall of the supporting machine. Through the arrangement of the conveying assembly and the overturning assembly, the transmission and overturning of the fully welded metal paint bucket are realized. The fully welded metal paint bucket is conveyed to the subsequent process through the conveying assembly. During the conveying process, the metal paint bucket is automatically overturned left and right under the overturning assembly. In this way, the process circulation time of a single workpiece is greatly shortened, which is especially suitable for batch production scenes and significantly improves the overall production capacity of the production line. Moreover, the overturning action is more gentle, which not only protects the surface integrity of the packaging bucket, but also guarantees the product quality.

The invention discloses a multi-target milling parameter optimization method and system based on ultrahigh strength steel, and relates to the technical field of mechanical manufacturing and machining.The method comprises the steps of 1, analyzing a parameter constraint range, 2, constructing a response surface agent model, 3, performing multi-target optimization, and 4, performing experimental verification, analyzing constraint range definition of each milling parameter, the method comprises the following steps: accurately establishing association between each milling parameter and total milling force, surface roughness and surface residual stress according to a response surface agent model, screening an optimal milling parameter combination through a multi-objective optimization algorithm, combining experimental verification to guarantee the reliability of the optimal milling parameter combination, and integrating a special milling parameter library adaptive to a 16Co14Ni10Cr2Mo ultrahigh-strength steel milling process. The problems that in traditional machining, milling parameters are not systematically constrained, and multi-target collaboration is insufficient are solved, the balance of the milling efficiency and surface integrity of the 16Co14Ni10Cr2Mo ultrahigh-strength steel and the service life of a tool is achieved, scientific parameter support is provided for machining of high-end parts, and machining accuracy and practicability are remarkably improved.

The invention discloses a full-process prediction method based on broaching parameters, surface integrity and fretting wear, and relates to the field of fretting wear. The method comprises the following steps: S1, acquiring multiple groups of surface integrity parameters and fretting wear parameters of a broached material; s2, the broaching parameters as input and the surface integrity parameters as output are substituted into a first Kriging agent model for training to obtain a first model, and the surface integrity parameters as input and the fretting wear parameters as output are substituted into a second Kriging agent model for training to obtain a second model; and S3, associating the first model with the second model to obtain a whole-process prediction model, and predicting the whole-process prediction model. According to the method, the broaching parameters, the surface integrity and the fretting wear parameters are subjected to full-process prediction, the limitation of traditional single parameter mapping is broken through, and full-process interpretability prediction of machining parameters, the surface state and the wear performance is achieved.

The application discloses a natural latex forming die capable of reducing overflow and a forming process, relates to the latex forming technical field, and aims to solve the overflow generated in the forming process of the current latex product and various disadvantages in the forming process.The technical scheme is as follows: the forming die comprises an upper die and a lower die, the upper die and the lower die form a die cavity, a pouring port and a plurality of overflow holes are formed in the upper die, the upper part of the pouring port is connected with a pouring pipe, and the upper part of the overflow hole is connected with an overflow pipe; a buffer tank with a buffer cavity is further arranged, the buffer tank is provided with a connecting pipe and a plurality of buffer pipes, the buffer pipes extend into the buffer cavity from the lower part of the buffer tank, and the buffer pipes correspond to the overflow pipes one by one.The application reduces the overflow waste of the latex forming, maintains the surface integrity of the product in the flow channel, and improves the surface quality of the latex product forming.

The invention provides a laser-assisted milling heat management method for a difficult-to-machine material, and relates to the technical field of laser-assisted machining. A multi-axis numerical control machining center is used as a basic platform, a laser preheating system and a multi-mode cooling system are integrated on the basis, a machining system is constructed, an active cooling technology and a laser-assisted machining technology are fused, accurate dynamic cooling is carried out on a cutting area of a tool while a laser heat source acts, and the machining precision is improved. And a cooperative machining environment of locally heating the workpiece and synchronously cooling the cutter is constructed. The method aims to effectively control the thermal field distribution of a cutting area, so that the thermal-mechanical coupling damage of the tool is inhibited while the advantages of laser softening materials are fully played, and finally the comprehensive purposes of prolonging the service life of the tool, improving the integrity of the machined surface and guaranteeing the machining precision are achieved.

The invention provides a positioning tool for laser marking of electromechanical equipment, and relates to the technical field of positioning, the positioning tool comprises two groups of vertical plates, the side wall of one group of vertical plates is provided with a first motor, the surfaces of the two groups of vertical plates are rotatably connected with rotating shafts, one ends of the two groups of rotating shafts are connected with an upper mounting frame, and the other ends of the two groups of rotating shafts are connected with a lower mounting frame. The other end of one group of rotating shafts is connected with a first driving wheel, and the first driving wheel is meshed with the output end of a first motor; a clamping mechanism is further included and arranged in the upper mounting frame, the clamping mechanism comprises a bearing ring, the upper end of the bearing ring is rotationally connected with an upper rotating wheel, the lower end of the bearing ring is rotationally connected with a lower rotating wheel, the lower end face of the upper rotating wheel is fixedly connected with a plurality of sets of rubber strips, and the other ends of the rubber strips are fixedly connected with the upper end face of the lower rotating wheel. The appearance quality and the surface integrity of the product are effectively protected through the rubber strip flexible clamping mechanism, and meanwhile the device can adapt to the appearance sizes and the surface shapes of different workpieces.

The application provides a 2Cr13 forging method for improving corrosion fatigue resistance of a last-stage blade of a steam turbine, which can realize grain refinement, carbide distribution optimization, surface integrity improvement and favorable residual compressive stress introduction by optimizing temperature gradient between forging heats and inserting surface treatment and heat treatment procedures in the whole forging process, so as to systematically improve service performance of the blade under corrosion-fatigue coupling conditions. The 2Cr13 forging method for improving corrosion fatigue resistance of a last-stage blade of a steam turbine comprises the following steps: top forging, first heat forging of a blank; the temperature of the first heat forging is 1135-1145 DEG C; pre-forging, second heat forging of the first intermediate blank after the top forging, the temperature of the second heat forging is 1125-1135 DEG C, and the second heat temperature is less than the first heat temperature and forms a gradient temperature difference of 5-20 DEG C; finish forging, third heat forging of the second intermediate blank after the pre-forging, the temperature of the third heat forging is 1030-1040 DEG C, and a blade forging piece is obtained.

This invention discloses a tenon and grooving broach and its atomizing cooling structure. Addressing the technical problem in existing technologies where coolant struggles to penetrate the narrow gap between the broach head and the workpiece, the invention incorporates a main coolant channel, a main compressed gas channel, coolant branch channels, compressed gas branch channels, and a compressed gas loop within the broach body. Each coolant branch channel includes a gas-liquid mixing chamber with an inverted cone and a fan-shaped slit outlet at its top, forming a nozzle structure. Each compressed gas loop contains multiple inclined injection channels for injecting compressed gas into the gas-liquid mixing chamber. During operation, the coolant and compressed gas mix and atomize in the gas-liquid mixing chamber, forming finer, higher-pressure atomized particles that are projected onto the broach head surface through the nozzles, achieving effective cooling of the broach head. Through this atomizing cooling structure, this invention effectively reduces the operating temperature of the tenon and grooving broach, extends its lifespan, and improves machining quality and surface integrity.

The invention provides a monocrystalline silicon wafer edge arc processing device, and relates to the technical field of silicon wafer processing, the monocrystalline silicon wafer edge arc processing device comprises a processing box, the processing box is internally provided with a mounting part, the mounting part is provided with a silicon wafer and a plurality of buffer members, the processing box is also internally provided with a lifting plate, and the lifting plate is provided with a press-fit damping assembly; a processing assembly and a circulating spraying assembly are further arranged in the processing box, the processing assembly comprises a grinding wheel and a driving part, the grinding wheel is used for processing the silicon wafer, and the driving part is used for driving the circulating spraying assembly to operate. A double-damping protection structure is formed by the buffering piece of the mounting part and the press-fit damping assembly on the lifting plate, a traditional rigid fixing and grinding mode is replaced, impact stress generated during grinding of a grinding wheel can be effectively buffered, the defects of microcracks, edge breakage and the like caused by stress concentration on the edge of a silicon wafer are overcome, and the service life of the silicon wafer is prolonged. And the mechanical strength and the surface integrity of the monocrystalline silicon wafer are obviously improved.

The application relates to the technical field of robot motor shell polishing, in particular to a robot motor shell polishing control method and system, which specifically comprises the following steps: constructing contact force oscillation degrees of each collection time period by the fluctuation trend change of the contact force extreme value point and the difference between the contact force at each moment and the expected value; constructing an extreme value position sequence by the sampling moment corresponding to the contact force extreme value point, constructing comprehensive oscillation degrees of each collection time period based on the difference between adjacent extreme value points, the corresponding time difference and the trend change of the elements in the extreme value position sequence, and combining the contact force oscillation degrees; and adjusting the proportional term of a PD controller according to the comprehensive oscillation degrees to perform robot motor shell polishing control. The robot motor shell polishing control method and system can avoid the over-polishing or under-polishing problems caused by traditional fixed parameters, significantly reduce the inconsistency defects of the shell surface roughness, and improve the polishing efficiency and the surface integrity of the motor shell.

This invention relates to a method for vibratory finishing of double-layer integral bladed disks, specifically including: selecting a vibratory finishing machine tool based on the structure of the integral bladed disk: a centerless island rotary vibratory finishing machine; protecting the edges of the double-layer integral bladed disk blades; performing long-term vibratory finishing on the double-layer integral bladed disk blades; removing the U-shaped rubber protective sleeve; polishing the protected parts of the double-layer integral bladed disk blades; and performing short-term vibratory finishing on the double-layer integral bladed disk blades. This invention achieves blade edge protection, extends the vibratory finishing time, and allows most of the blade surface to be finished by vibratory finishing, significantly reducing the workload of manual polishing and solving the problem of long manual polishing cycles for double-layer integral bladed disks. This method can shorten the total processing cycle to 30%; greatly improves processing efficiency and surface integrity, shortens the development cycle; ensures the blade dimensions are within acceptable limits, and avoids dimensional deviations caused by vibratory finishing.

The gear-vane collaborative optimization machining parameter adaptive system of the present application belongs to the cross technical field of mechanical precision machining and artificial intelligence, comprising: a state perception module for real-time acquisition of multi-source heterogeneous data in the machining process and construction of a state vector of the current state of the system; a virtual twin prediction module for receiving the state vector and candidate machining parameter actions and predicting the three-dimensional physical field distribution in the future time step; a decision reward calculation module for calculating a scalar reward value for guiding decision-making according to the three-dimensional physical field distribution, the present application solves the technical contradiction that the two requirements of strengthening gear surface integrity and maintaining vane aerodynamic performance degree conflict with each other and cannot be considered in the prior art.

The method for improving the surface performance of the gear comprises the following steps: carrying out polishing pretreatment on a surface part to be subjected to laser shock peening of the gear; the gear is cleaned and then dried in hot air; carrying out coating-free nanosecond laser surface shock peening on the gear; cleaning and drying the gear; carrying out vibration finishing post-treatment on the gear; and the gear is cleaned and dried. Nanosecond laser with millimeter-scale light spots is adopted to introduce a work-hardened layer and a high-amplitude residual compressive stress layer in the material gradient direction to improve the surface mechanical property, an absorption protection layer does not need to be arranged, and meanwhile, technical defects caused by heat influences such as laser ablation are avoided through vibration polishing. The method is especially suitable for surface modification of tooth root meshing positions and other conditions where protective layers are inconvenient to arrange. The surface integrity and the comprehensive mechanical property of the gear are improved, and the coupling effect remarkably enhances the fatigue failure resistance of the gear.

The invention discloses an ultrasonic vibration turning-rolling combined machining device for machining slender shafts, which comprises a double-excitation ultrasonic elliptical turning system, a first ultrasonic vibration rolling system, a second ultrasonic vibration rolling system, an ultrasonic rolling system retainer and a fixed tool rest, the double-excitation ultrasonic oval turning system and the ultrasonic rolling system holder are both installed on the fixed tool rest. The first ultrasonic vibration rolling system and the second ultrasonic vibration rolling system are both installed on the ultrasonic rolling system holder, three-point positioning is formed, and the first ultrasonic vibration rolling system and the second ultrasonic vibration rolling system are used for synchronously conducting turning and rolling machining. The invention further comprises a machining method for machining the slender shaft in an ultrasonic vibration turning-rolling combined mode, after ultrasonic turning, the machined surface of the slender shaft workpiece after turning is synchronously strengthened through the ultrasonic rolling system, high-quality surface integrity is obtained, and the machining efficiency of the slender shaft workpiece is improved.

The invention belongs to the technical field of titanium alloys, and particularly relates to a high-surface-quality alloy for 3C products and a preparation method and application of the high-surface-quality alloy. According to the method, TiH2 serves as the raw material, alloy elements Co, Fe or Cu, especially cobalt (Co) are introduced into a TC4 alloy system, the surface quality of the TC4 alloy system can be remarkably improved, the method is suitable for the field of 3C products with the strict requirement for surface integrity, and a new technical path is provided for preparation of high-surface-quality titanium alloy components in the 3C field.

This invention relates to the field of crystal processing equipment technology, specifically to a single crystal furnace with a protective mechanism to prevent crystals from falling. The furnace includes an anti-fall device mounted on the furnace body, comprising a moving device, a traction rail, a lifting device, and an adaptive locking device. The moving device is fixedly mounted on the side of the furnace body. The traction rail is positioned directly above the furnace body, and a displacement sensor is installed inside the traction rail, which is connected to the movable end of the moving device. The lifting device is fixedly mounted on the top of the traction rail and has a weight detector. The adaptive locking device is installed inside the traction rail and includes a first synchronous contraction device mounted in the traction rail. A flexible binding mechanism and a two-stage limiting device are installed on the movable end of the first synchronous contraction device, and a centering guide device is installed above the first synchronous contraction device. This invention improves the reliability of fracture protection and surface integrity, and optimizes the material feeding process.