351results about "Extrusion control devices" patented technology

The invention discloses an extrusion production process for an aluminum alloy multi-cavity profile. The extrusion production process comprises the following steps that S1, raw materials are prepared; s2, designing and manufacturing a mold; s3, pretreatment before extrusion; s4, extrusion forming; s5, cooling treatment; s6, straightening and finishing; s7, aging treatment; and S8, detecting and packaging. According to the invention, the friction is further reduced by adopting a special high-temperature lubricant and an ultrasonic vibration device in the pre-extrusion pretreatment, the precise control is realized by arranging real-time monitoring and feedback systems such as a laser range finder and an infrared thermometer in the extrusion forming process, and the cooling treatment is realized by automatically adjusting parameters by adding a corrosion inhibitor and arranging a sensor, so that the production efficiency is improved. The cooling quality of the profile is ensured; laser scanning and electrolytic polishing technologies are adopted for straightening and finishing, the straightening precision and the surface quality are improved, a circulating hot air system and a segmented aging mode are adopted for aging treatment, and the aging effect is improved.

The invention discloses a Cu-Cr-Zr-TiB2 copper-based composite material and a preparation method and application thereof. A blank containing TiB2 particles is subjected to rotary forging to obtain a rotary forging piece, the rotary forging piece is subjected to primary aging treatment and then subjected to electric pulse drawing to obtain a drawing piece, and then the drawing piece is subjected to secondary aging treatment to obtain the Cu-Cr-Zr-TiB2 copper-based composite material. According to the Cu-Cr-Zr-TiB2 copper-based composite material prepared through the preparation method, the copper matrix is of a gradient structure with the surface layer being a nanocrystalline layer of 50-200 nm and the core part being fine grains of 0.5-1 micron, TiB2 particle reinforced phases are distributed in the copper matrix in a fibrous mode in the axial direction, and Cr / Zr nano precipitated phases are distributed in gaps of the TiB2 particle reinforced phases and in crystals of the copper matrix in a dispersed mode; therefore, the high-hardness, high-strength, high-conductivity, high-softening-temperature, excellent high-temperature performance and excellent arc extinguishing performance are achieved.

The invention relates to an intelligent management method and system for an aluminum profile extrusion conveying production line, and the method comprises the following steps: monitoring a multi-station equipment parameter, and obtaining an aluminum profile production process parameter; performing thermal-mechanical coupling analysis on the aluminum profile based on the aluminum profile production process parameters to obtain an aluminum profile rheological characteristic vector; performing quality correlation mapping on the aluminum profile based on the rheological characteristic vector of the aluminum profile to obtain an aluminum profile quality prediction parameter; when the aluminum profile quality prediction parameters are not in a preset target quality parameter range, cooperative control strategy generation is carried out on the station devices based on the aluminum profile quality prediction parameters, and multi-station cooperative control parameters are obtained; and through the multi-station cooperative control parameters, the production line equipment is driven to carry out closed-loop cooperative control on the aluminum profile, so that the technical problems that the control strategy is lagged and the deviation cannot be corrected in time due to the lack of a quality prediction and feedback regulation mechanism based on real-time data are solved.

The invention relates to an intelligent control method and system for extrusion forming of an aluminum profile, and the method comprises the following steps: carrying out acoustic emission sensor array measurement and preprocessing on a mold inlet region of the aluminum profile in an extrusion process, and obtaining a preprocessed acoustic emission signal sequence; performing time-frequency domain energy distribution analysis on the acoustic emission spectrum to generate an acoustic emission energy spectrogram; carrying out material flow stability analysis based on the spectrogram to obtain a flow analysis result; if the flow instability degree exceeds the target stability range, multi-constraint optimization calculation is conducted on the main cylinder pressure and the extrusion speed based on the analysis result, and optimization control parameters are obtained; and finally, closed-loop feedback control is performed on the extruder through a distributed PID controller, so that the material flow stability is kept in a target range, intelligent high-precision forming control is realized, and the problem that in the traditional extrusion process, the material flow stability is often influenced by factors such as the extrusion speed, the main cylinder pressure and the mold design is solved. And a flow instability phenomenon is easy to occur.

The invention particularly relates to an aluminum profile straightening machining method with an aluminum bar as a raw material, and relates to the technical field of aluminum profile machining. Extruding and forming; determining a straightening scheme; and precision detection. According to the method, a whole-process quality control system is constructed from raw material pretreatment to post-treatment storage; the straightening scheme depends on characteristic parameterization to accurately adjust pressure, match pressure maintaining and release stress in a targeted mode, and the problem of stress concentration of the special-shaped section is solved. Precision detection covers multi-dimensional form and location tolerances and defects, and data are fully traced, so that support is provided for quality closed-loop management and control; surface protection and storage are standardized through post-treatment, and performance degradation is prevented; the whole process is coordinated, the straightness, the stress uniformity and the size precision of the aluminum profile are greatly improved, and the requirements of the high-end field for high-quality profiles are met.

The invention discloses an extrusion forming device and method, the extrusion forming device comprises an extrusion container assembly, a mold assembly and an extrusion assembly, the extrusion container assembly is provided with at least two mutually independent blank cavities, and the cross section of at least one blank cavity is non-circular; the mold assembly comprises a gradual change type flow channel structure, a welding chamber structure and a mold outlet structure, the gradual change type flow channel structure comprises at least two mold flow channels, and the inlet ends of the at least two mold flow channels are in butt joint with the outlet ends of the at least two blank cavities in a matched mode; the at least two mold runners are used for carrying out plastic deformation on the metal blanks in the blank cavities and guiding the metal blanks to the welding chamber structure, and the welding chamber structure is used for carrying out interface welding on metal from the different mold runners; and the extrusion assembly is used for extruding the metal blanks in the at least two blank cavities. The extrusion force can be obviously reduced, the material flow uniformity is improved, the die complexity and material waste are reduced, the profile forming quality is improved, and the service life of the die is prolonged.

The invention belongs to the technical field of aluminum alloy material preparation, and particularly relates to a preparation method of an aluminum alloy reflector bar, which comprises the following steps: sequentially carrying out high-temperature extrusion processing, low-temperature extrusion processing, extreme high-temperature solution treatment and aging treatment on an aluminum alloy cast ingot to obtain the aluminum alloy reflector bar; the heating temperature of the high-temperature extrusion processing is 500-560 DEG C; the heating temperature of the low-temperature extrusion processing is 300-350 DEG C; the solid solution temperature of the extreme high-temperature solid solution treatment is 560-580 DEG C; the cost is reduced, and the performance of the aluminum alloy bar is improved.

The embodiment of the invention relates to an intelligent control method and system for a data-driven aluminum extruding machine and the aluminum extruding machine, and belongs to the technical field of electronic data process.The method comprises the steps that multi-source time sequence data are collected and converted to obtain two-dimensional depth characteristics, data distribution is detected, and the data distribution is calculated; a generative adversarial network and dynamic time warping oversampling are used to enhance an unbalanced sample, a domain invariant feature model is trained to extract cross-working-condition robust features, state evaluation information output by the model is accessed to a non-parameterization prediction control framework, a multi-objective optimization function is constructed based on real-time sliding window data at each beat, and a multi-objective optimization function is constructed based on real-time sliding window data. And an optimal control sequence is issued to an execution mechanism after solving, and online closed-loop adjustment of parameters such as the extrusion speed and the temperature is achieved. According to the embodiment of the invention, data processing, AI and automatic control are fused, self-adaption to working condition changes is realized, the control precision and the quality stability can be improved, and the energy consumption and the cost are reduced.

The invention belongs to the technical field of magnesium alloys, and relates to a high-modulus and high-toughness dual-phase magnesium alloy and a preparation method thereof, aiming at the field problem that the modulus-toughness of the magnesium alloy is not matched, an Mg-Y-Ni alloy system is selected, the atomic ratio of Y to Ni is set to be 1, the content of Y and Ni in the magnesium alloy is regulated and controlled, nucleation and growth of a large number of 14H-LPSO phases are promoted, and the high-modulus and high-toughness dual-phase magnesium alloy is obtained. The magnesium alloy only containing alpha-Mg / 14H-LPSO double phases is prepared; and secondly, through extrusion deformation at a specific extrusion temperature and an extrusion ratio, reproduction and proliferation of a 14H-LPSO phase are promoted, and meanwhile fine recrystallized grains are obtained, so that remarkable LPSO fiber strengthening and fine grain strengthening are generated on a magnesium alloy matrix, the high-modulus and high-toughness wrought magnesium alloy is prepared, the elastic modulus of the wrought magnesium alloy is larger than or equal to 45 GPa, the tensile strength of the wrought magnesium alloy is larger than or equal to 350 MPa, the yield strength of the wrought magnesium alloy is larger than or equal to 300 MPa, and the elongation of the wrought magnesium alloy is larger than or equal to 7%.

The invention relates to the technical field of intelligent manufacturing, in particular to an extrusion processing workshop intelligent operation and maintenance method and system based on digital twinning, and the method comprises the following steps: importing a production plan through a digital twinning system, generating a processing task list, and synchronizing a virtual model; the specification of the billet is obtained by using RFID, and a tracking code is generated and a task is bound. And matching process parameters, regulating and controlling the temperature of the heating machine, collecting temperature data and generating a compensation instruction. Based on the compensation instruction, planning a manipulator path, monitoring a pose correction deviation, and feeding the billet into an extruder; calling a pressure curve, collecting a pressure value, and generating an adjusting instruction by combining material simulation to realize constant strain rate extrusion; according to the pressure feedback, the wire collecting tension is adjusted, the wire diameter fluctuation is monitored, and a speed compensation instruction is generated; generating a wire unloading path according to the specification of the wire coil, and controlling the robot to place the wire coil and update a task state; according to the invention, efficient, accurate and intelligent extrusion processing operation and maintenance are realized.

The invention relates to the technical field of metal material plastic forming, and discloses an extrusion feeding device, an extrusion forming system and a control method.The extrusion feeding device comprises a loading module and a feeding driving module, and the loading module is arranged between an extrusion driving device and an extrusion forming device; a plurality of loading parts used for loading bars are distributed on the loading module, the plurality of loading parts extend and penetrate in the first direction, the loading module is provided with a heating assembly, and the heating assembly is used for heating the bars of the plurality of loading parts; the feeding driving module is used for driving the loading module to move in the direction perpendicular to the first direction so as to control the loading module to move out of or move into the working position between the extrusion driving device and the extrusion forming device. According to the invention, the heating assembly and the plurality of loading parts are adopted, bar material supplement and temperature stabilization are completed in the extrusion stroke, the extrusion temperature of the bar material can be accurately controlled, and the controllability of extrusion process conditions is ensured.

The invention discloses an extruding machine for aluminum profiles, which belongs to the technical field of extruding machines and comprises an extruding machine body, and a die module, an extruding module and a hydraulic safety module are arranged on a station table; the mold module comprises an installation mold base arranged on the station table, and a discharging mold used for aluminum profile forming is detachably installed on the installation mold base. The extrusion module comprises a foundation seat mounted behind the mounting die holder, an extrusion die holder is arranged on the foundation seat, and an extrusion template is arranged at the end part of the extrusion die holder. In the aluminum blank transfer stage, the extrusion inner mold core is continuously heated through the electromagnetic induction technology of the heating coil, so that the mold temperature is consistent with the aluminum blank temperature; when an aluminum blank enters the extrusion cylinder, the electric push rod drives the heating coil to move to the preheating channel from the constant-temperature annular opening, the aluminum blank is subjected to compensation heating through constant-speed movement, the problem of temperature drop in the transferring process is solved, mechanical locking is conducted on the pressure induction type hydraulic column through the multiple clamping pieces, pressure stability in the shutdown stage is maintained, and extrusion continuity is ensured.

The invention relates to the field of aluminum alloy profile extrusion cooling, and discloses an extrusion cooling online detection and feedback correction system which is characterized by comprising a parameter acquisition module, a cooling data acquisition module, a cooling device calibration module, a data processing and control module and a cooling device controller. By organically combining multi-parameter sensing, device precise calibration, multi-dimensional state evaluation, intelligent function matching, closed-loop feedback adjustment and machine learning self-optimization, a highly-intelligent, self-adaptive and high-precision cooling control system is constructed, the industrial pain point in the aluminum alloy extrusion cooling process is fundamentally solved, and the production efficiency is improved. And the method has great value for improving the product quality and the production efficiency of the high-end aluminum alloy profile.

The preparation method of the aluminum-lithium alloy profile with the high batch stability comprises the following steps that forging is conducted, specifically, an aluminum-lithium alloy cast ingot is heated and then forged, and the single-pass upsetting deformation of upsetting and drawing during forging is 60-75%; extrusion: heating the forged blank, the extrusion container and the die, and then carrying out extrusion treatment; solid solution quenching: carrying out solid solution quenching treatment on the blank subjected to extrusion treatment to obtain a profile; low-temperature heat preservation is conducted, specifically, the profile obtained after solution quenching treatment is subjected to low-temperature heat preservation treatment, the temperature ranges from 0 DEG C to 5 DEG C, and the heat preservation time is not shorter than 30 min; and carrying out pre-stretching and aging treatment on the profile subjected to low-temperature heat preservation treatment. According to the invention, the production efficiency can be improved, and the aluminum-lithium alloy material with high batch stability and excellent performance can be prepared, so that the requirements of a new generation of airplanes on the profile can be better met.

The invention discloses an aluminum alloy profile production and processing optimization control method and system, and relates to the technical field of aluminum alloy processing, the system monitors and acquires processing data in real time through a processing data acquisition module, and processes the data through an optimization algorithm in a dynamic control adjustment analysis module; and optimizing and outputting a grain size change rate, a stress relaxation time constant and an oxide layer thickness change rate. The optimization parameters are calculated and analyzed through a comprehensive optimization objective function, and the quality stability and consistency in the machining process are ensured. Especially in the production process, by adjusting the grain size change rate, the stress relaxation time constant and the oxide layer thickness change rate, the system can respond to changes in the machining process in real time, and therefore the machining quality of the aluminum alloy profile is remarkably improved, product quality fluctuation is reduced, and production reliability is improved.

The invention discloses a process for preparing a high-strength aluminum alloy profile through gradient cooling die-electromagnetic vibration combined extrusion, and belongs to the technical field of aluminum alloy machining. According to the technology, the uniform fine grain structure and high performance of the aluminum alloy profile are achieved through the design of the length of a die working tape and the flow gradient of a cooling channel in cooperation with an electromagnetic vibration device. After a blank is subjected to homogenization treatment, the blank is extruded through a gradient cooling die, a thin-wall area working zone is 20-25 mm, the cooling water flow is 15-20 L / min, a thick-wall area working zone is 10-15 mm, the cooling water flow is 5-10 L / min, 20-50 Hz electromagnetic vibration is applied at the same time, water mist quenching and aging treatment are conducted immediately after extrusion, zinc ions serve as heterogeneous nucleation cores to promote generation of new crystal grains, ferrocene sulfenyl is adsorbed to the surfaces of the crystal grains to inhibit growth, and the thickness of the crystal grains is 10-15 mm. The average grain size is refined, and the effect is improved.

The invention discloses an extrusion manufacturing method of an S32750 duplex stainless steel large-diameter seamless steel pipe. The extrusion manufacturing method comprises the following steps: smelting S32750 duplex stainless steel in an electric furnace, performing external refining, performing vacuum degassing, and casting a die casting steel ingot; demolding the steel ingot, heating in a heating furnace, and preserving heat; after spraying a glass powder lubricant on the steel ingot, carrying out closed upsetting and backward extrusion punching to obtain a hollow blank, and carrying out air cooling or water cooling on the hollow blank to room temperature; machining the surface of the hollow blank, heating in a heating furnace, preserving heat, spraying a glass powder lubricant, and extruding the hollow blank to obtain a steel pipe blank; and after being extruded, the steel pipe blank is immediately put into water to be rapidly cooled, the steel pipe blank is subjected to solution treatment, the required size is obtained through a machining process, and the S32750 duplex stainless steel large-diameter seamless steel pipe is obtained. The problems that the S32750 duplex stainless steel large-diameter seamless steel pipe is low in low-temperature impact toughness at the temperature of-47 DEG C and the surface of the steel pipe cracks are solved.

The invention relates to the technical field of aluminum alloy profile preparation, and discloses a high-strength threshold beam aluminum alloy profile and a preparation method thereof.The high-strength threshold beam aluminum alloy profile is prepared from, by weight, 85-90 parts of aluminum ingots, 0.8-1.5 parts of silicon, 0.6-1.2 parts of magnesium, 0.3-0.8 part of copper, 0.2-0.6 part of zinc, 0.4-0.9 part of manganese, 0.05-0.15 part of titanium, 0.1-0.3 part of zirconium, 0.05-0.1 part of chromium and 0.02-0.08 part of yttrium. Through the vacuum induction melting and electromagnetic stirring processes, the situation that alloy elements such as silicon, copper and zinc form a thick second phase in the melting process is avoided, the alloy structure is refined, and crack initiation points are reduced, so that the toughness of the material is effectively improved, the material is not prone to breakage when bearing impact, and the safety of the automobile doorsill beam during collision is guaranteed.

The invention provides a tin-based babbitt metal composite material and a preparation method thereof. The preparation method of the tin-based babbitt metal composite material comprises the following steps: weaving a long fiber wire material on the surface of a tin-based babbitt metal wire material to obtain a tin-based babbitt metal fiber material; the tin-based babbitt alloy fiber material is subjected to hot extrusion treatment after being subjected to shaping treatment, and a composite pipe is obtained; splitting the composite pipe along the rotation axis to obtain a first composite plate; carrying out hot rolling treatment on the first composite board to obtain a second composite board; the multiple second composite plates are rolled, so that the tin-based babbitt metal composite material is obtained; the technical problem to be solved by the invention is the preparation of the tin-based babbitt alloy composite material in the prior art. Due to the fact that the density difference between the reinforced fibers and the tin-based babbitt metal is large, the problem that the reinforced fibers and the tin-based babbitt metal are layered exists in a common casting process and a cold metal transition additive manufacturing process, and it is difficult to evenly distribute the reinforced fibers in the tin-based babbitt metal.

The invention belongs to the technical field of non-ferrous metal material preparation, and particularly relates to a preparation method of an aluminum alloy extruded profile, which comprises the following steps: smelting and casting raw material components of the aluminum alloy extruded profile to obtain a cast ingot, and then carrying out homogenization treatment, three-way high-temperature upsetting and drawing, high-temperature annealing, cryogenic three-way compression, high-temperature extrusion, cooling and aging treatment to obtain the aluminum alloy extruded profile. An aluminum alloy extrusion profile is obtained; the temperature of three-way high-temperature upsetting and drawing ranges from 500 DEG C to 560 DEG C, the temperature of high-temperature annealing ranges from 540 DEG C to 580 DEG C, the temperature of cryogenic three-way compression ranges from-180 DEG C to-150 DEG C, and the temperature of high-temperature extrusion ranges from 500 DEG C to 540 DEG C; the strength and the ductility of the aluminum alloy extruded profile are improved.

The invention relates to an aluminum alloy and a preparation method thereof.The preparation method comprises the following steps that an aluminum alloy ingot is sequentially subjected to first-time forward extrusion treatment, annealing treatment and second-time forward extrusion treatment, and the aluminum alloy is obtained; wherein the preheating temperature of the second-time forward extrusion treatment is higher than that of the first-time forward extrusion treatment, and the extrusion speed of the second-time forward extrusion treatment is higher than that of the first-time forward extrusion treatment. According to the preparation method, the average grain size of the aluminum alloy can be refined to be 100 microns or below, the strength of the aluminum alloy is effectively improved, and the preparation method has universality and is particularly suitable for preparing the 6-series aluminum alloy which is high in strength and low in Mn and Cr element content.

The application relates to the technical field of aluminum material processing, in particular to an aluminum material extrusion forming device and a forming process. The aluminum material extrusion forming device comprises a base, an extrusion assembly, a discharging box, a heating assembly, a die changing assembly, a die and a feeding assembly. The extrusion assembly and the discharging box are located on the base, the heating assembly and the feeding assembly are located on the side of the base, a passage is formed in the side wall of the discharging box in the width direction, the die changing assembly is located in the passage, the die is located on the die changing assembly, a feeding port and a discharging port are formed in the side wall of the discharging box in the length direction, a ingot containing cylinder which is movably connected with the feeding port is arranged in the feeding port, and a temperature control assembly is arranged in the discharging box. The die placed on the die changing assembly is quickly connected with the ingot containing cylinder in the discharging box through the arrangement of the die changing assembly, a plurality of dies can be arranged at the same time, the installation and replacement time of the dies is reduced, the temperature of the die in the discharging box is controlled by the temperature control assembly, and the production efficiency and product quality are improved.

The invention relates to the technical field of aluminum alloy battery box shell extrusion, in particular to an aluminum alloy battery box shell extrusion device and a working method thereof.The aluminum alloy battery box shell extrusion device comprises a base, a driving motor, a control cabinet, a feeding cavity, a conveying pipe, a spiral feeding rod, a discharging mechanism and a forming mechanism; the driving motor is installed on the base, the control cabinet is installed on the side face of the driving motor, the feeding box is installed on the side face of the control cabinet, the conveying pipe is installed on the side face of the feeding box, the spiral feeding rod is installed in the conveying pipe, and the discharging mechanism is installed on the side face of the conveying pipe. The forming mechanism is installed on the side face of the discharging mechanism. The spiral feeding rod feeds materials into the forming mechanism through the discharging mechanism, and the discharging mechanism achieves a control switch for one-time replacement circulation of cooling water in the forming mechanism in the single-time forming work.

The invention relates to the technical field of aluminum profile hot extrusion cooling shaping, and particularly discloses an aluminum profile hot extrusion cooling shaping device which comprises a fixing table, a lifting table is arranged at the upper end of the fixing table in a lifting mode, a mounting groove is formed in the lower end of the lifting table, a graphite disc is arranged in the mounting groove in a lifting mode, and a graphite plate is arranged in the middle of the inner bottom wall of the graphite disc. A scraping assembly is arranged on the lifting table, and a switching assembly is arranged on the fixed table. The graphite plate is fixedly placed in the graphite plate, then the graphite plate is lifted into the installation groove, the height of the lifting table is adjusted at the same time, the cambered surface of the graphite plate abuts against the aluminum profile, the graphite plate can rapidly absorb and dissipate heat of the aluminum profile, and the aluminum profile is rapidly cooled, solidified and shaped under the pressure effect. And the scraping assembly is used for scraping the cambered surface of the graphite plate to repair or adjust the cambered surface shape, and the switching assembly is used for switching different graphite plates, so that the production efficiency is improved, and different cambered surface requirements are met.

The invention discloses an aluminum alloy extrusion temperature control method based on numerical calculation, which relates to the technical field of metal material processing, and comprises the following steps: constructing a heat-force coupling model in an aluminum alloy extrusion process; based on the thermal-mechanical coupling model, initial extrusion process parameters are obtained through numerical simulation and a target optimization mode; aluminum alloy extrusion is carried out based on the initial extrusion process parameters, and the extrusion outlet section average temperature and the section deviation temperature when the aluminum alloy extrusion outlet section average temperature is stable are calculated; judging whether the extrusion outlet section average temperature is in a preset temperature range or not and whether the section deviation temperature is not greater than a preset deviation threshold value or not; and according to the judgment result, the optimal extrusion speed is determined, and aluminum alloy extrusion is conducted at the optimal extrusion speed. Uniformity and consistency control over the temperature of the section of an aluminum alloy extrusion outlet can be achieved, the aluminum alloy extrusion forming efficiency and forming quality are improved, and raw material loss of aluminum alloy extrusion forming is reduced.

The invention relates to the technical field of aluminum alloy profiles, and discloses a preparation method of an aluminum alloy profile for a battery pack structure, which comprises the following steps: step S1, on the basis of alloy components and high-temperature fluidity characteristics of aluminum alloy, the distribution of shunting holes of an extrusion die is designed through finite element simulation optimization, so that the distribution of the shunting holes is matched with the section shape of the profile; s2, the optimized mold is used for isothermal extrusion forming of molten aluminum alloy, extrusion is conducted under the constant-temperature condition, and a primary profile blank is formed; s3, through differentiated welding chamber depth design, the flow velocity and the filling uniformity of metal in all the areas are controlled; and S4, the formed profile is subjected to heat treatment. According to the method, the flow uniformity of metal in the extrusion process is remarkably improved through the optimal design of the die flow dividing holes based on finite element simulation and a fluid dynamic model in combination with curve fitting of the depth of the differential welding chamber and the profile section contour.

An apparatus for reducing the cross-section of a tubular hollow body with a hollow body wall has a shaping die on the outer side of the hollow body, a mandrel in the interior of the hollow body, and a shaping drive with a mandrel drive and a die drive. The shaping die is movable by the die drive to reduce a cross-section of the hollow body with an axial movement of the die. The mandrel is movable via the mandrel drive along the hollow body axis through the die opening in the shaping die. The hollow body wall is subjected to a tensile stress by the mandrel and is drawn in the direction of the axial movement of the mandrel through the die opening. The mandrel drive and the die drive are controlled so that the axial mandrel movement and the axial die movement die are superimposed on one another.

The present invention provides an extrusion machine ingot powder spraying lubrication adaptive control system and method, which includes a powder spraying trolley, a track, a loading manipulator and a PLC control system. The loading manipulator holds an ingot. The powder spraying trolley is arranged on the track. Both the powder spraying trolley and the loading manipulator are electrically connected to the PLC control system, and the PLC control system is electrically connected to an HMI human-machine interface. By the PLC control system, the present invention can monitor in real time the change of displacement data of encoder one of the powder spraying trolley and encoder two of the loading manipulator, and can adjust in real time the position of the powder spraying trolley and the change of its moving speed, so that the start-stop of the powder spraying trolley walking, the change of speed and the start-stop of the solenoid valve always maintain a dynamic sequential balance, ensuring the smooth progress of ingot powder spraying lubrication. Without occupying non-extrusion time, it can adaptively complete ingot powder spraying lubrication for different ingot lengths under the state of the extrusion process of the extrusion machine, reduce labor intensity and labor costs, improve production efficiency and speed up the production rhythm.

This invention provides a method for improving the microstructure and corrosion uniformity of low-temperature extruded magnesium alloys, belonging to the field of magnesium alloy preparation and processing. The method includes the following steps: S1: Cutting a low-alloy element content magnesium alloy ingot and removing the surface oxide layer to obtain a cast sample; S2: Performing pulsed current homogenization treatment on the cast sample; S3: Removing the surface oxide layer from the homogenized alloy to process it into an extrusion billet; S4: Performing low-temperature extrusion treatment on the extrusion billet under pulsed current assistance. This invention improves the microstructure and corrosion uniformity of low-temperature extruded magnesium alloys while ensuring high strength and plasticity, and is suitable for the efficient and energy-saving preparation of biodegradable magnesium alloy extruded bars and sheets.

This invention discloses an isothermal extrusion method for aluminum alloys based on data feedback optimization control, belonging to the field of metal material processing technology. The method includes: Step 1, extruding an aluminum alloy rod at a preset initial temperature and a preset initial extrusion speed; Step 2, acquiring the extrusion exit temperature of the aluminum alloy rod in real time, and determining in real time whether the extrusion exit temperature is not less than a preset maximum temperature. If so, adjusting the extrusion speed in real time using a preset control equation until the current aluminum alloy rod extrusion is completed; Step 3, acquiring the function of the extrusion speed changing with time during the current aluminum alloy rod extrusion process, and correcting the function to obtain the corrected speed for extruding the next aluminum alloy rod; Step 4, if further extrusion is needed, extruding the next aluminum alloy rod at a preset initial temperature and corrected speed, and returning to Step 2 for repeated execution. This invention can significantly improve the efficiency and quality of aluminum alloy extrusion forming.