38 results about "Metal flow" patented technology

This invention provides a thickness control method for a single-stand reversible cold rolling mill. The single-stand reversible cold rolling mill unit includes an inlet coiler, an outlet coiler, a mill body, a mill hydraulic system, an inlet thickness gauge, an outlet thickness gauge, an inlet speed gauge, an outlet speed gauge, an inlet tension gauge, and an outlet tension gauge. The single-stand reversible cold rolling mill unit also includes an S-roll, with S-rolls at both the inlet and outlet of the unit. The S-roll can rotate 180°, with the upper roll of the S-roll able to rotate to the lower roll position and the lower roll of the S-roll able to rotate to the upper roll position. The 180° rotation causes the strip steel to wind in an S-shape on the S-roll. The thickness difference of the strip steel is eliminated by adjusting the speed of the inlet S-roll to control the metal flow rate entering the roll gap.

The utility model relates to the field of industrial die casting, especially to the die casting die of automobile engine casing, including support frame, still including connecting frame and liquid storage box, be provided with die casting on the support frame, and the die casting includes bottom die, upper die and injection chamber, the utility model discloses through the telescopic link of cylinder drive liquid storage box is located in the upper end of support frame and carries out the sliding in position, and through the output of liquid storage box top while sliding the lower end of upper die and the upper end of bottom die are carried out the work of spraying release agent, through the upper die on the die casting and move downward, make the upper die drive second limit rod downward displacement drive slider and move downward, make the lower end of upper die and the upper end of bottom die mutually adhere, then inject liquid metal from injection chamber, liquid metal flows to the gap between bottom die and upper die and die casting forming, after forming, the upper die moves upward, the casing on the bottom die passes through the upward thrust of the reaction force of spring of lower slider, realize the work of automatic release of casing.

The present application relates to a kind of composite structure cold heading extrusion die, including upper die and lower die.The upper die is the overall flat bottom angle convex die, and the shaped end face is provided with the profile contour of twelve-angle and flange composite.The lower die adopts transverse segmentation type three-layer concave die structure, and is sequentially from inside to outside working die core and insert, inner layer and outer layer prestressed ring, press sleeve;Working die core and / or insert adopt Cr12MoV and are quenched by vacuum tempering, and press sleeve adopts 45 steel.The lower die is provided with the unloading rod of stepped inner cavity, and is matched with the lower end of convex die when die is closed, and metal flow is constrained, and is independently pushed up when die is opened Demoulding.The present application is dispersed by prestressed ring layering constraint load, and stress concentration is slowed down, and metal flow is improved by unloading rod and the risk of sticking die is reduced, with the advantages of high forming precision, smooth unloading, long service life, suitable for the cold heading forming of complex special-shaped head workpiece.

This invention relates to the field of metallic materials technology and discloses a method for improving the performance utilization rate of metallic materials based on multi-directional forging. This method first performs homogenization annealing pretreatment and initial microstructure quantitative characterization on the target metal billet to determine the critical deformation parameters and hot working window of the material. Then, the multi-directional forging is divided into three consecutive stages: pre-forging, main forging, and final forging. Process parameters for each stage are customized, and a differentiated progressive reversing forging path is adopted to collaboratively control the deformation uniformity and metal flow line orientation in each direction. After final forging, gradient temperature-controlled cooling is used to achieve microstructure transition regulation, and combined with microstructure-matching heat treatment, the performance of the forging is homogenized across the entire cross-section. Finally, the machining allowance is optimized based on the differentiated performance distribution of the forging. This invention solves the problems of mixed-grain microstructure, large performance anisotropy, and low utilization rate in traditional multi-directional forging.

This invention relates to the field of aluminum profiles, specifically disclosing a hard aluminum alloy tube and its preparation method. The preparation method includes: (1) melting and casting aluminum alloy raw materials to obtain a hard round ingot; (2) heating the hard round ingot and loading it into an extrusion cylinder; (3) using an extrusion rod to extrude the aluminum alloy in the extrusion cylinder into an extrusion die; (4) splitting the hard round ingot with a die bridge to form a metal flow along a diversion hole; (5) allowing the metal flow from the diversion hole to enter a welding chamber, and the multiple metal flows flowing out through multiple diversion holes to re-weld in the welding chamber; (6) allowing the re-welded metal flow to flow into the working zone formed between the die core and the die hole to form a rough blank; (7) quenching and aging the rough blank to obtain a hard aluminum alloy tube; wherein, the yield strength of the hard aluminum alloy tube is ≥380MPa. By implementing this invention, the forward extrusion forming of hard aluminum alloy tubes can be realized, and the mechanical properties of the tubes can be improved.

This invention provides a method for manufacturing high-toughness and ultra-high-strength steel pipes, comprising the following steps: 1) electric arc furnace smelting; 2) ladle refining; 3) VD vacuum degassing; 4) continuous casting; 5) low-temperature annealing; 6) through-hole drilling; 7) heating; 8) skew rolling piercing; 9) periodic pipe rolling; 10) mist cooling; 11) normalizing + tempering; 12) internal and external grinding. This invention, through electric arc furnace smelting + ladle refining + VD vacuum degassing + continuous casting, not only meets the requirements for high-purity steel with low phosphorus and low sulfur content, but also has lower smelting costs than other processes. By using a round billet center mill to add through-holes, the amount of piercing deformation is reduced, metal flow conditions are optimized, and internal and external surface defects under complex stress conditions during piercing are improved. Based on the integrated deformation of forging, rolling, and extrusion, four processes—forging and rolling, precision rolling, sizing, and pipe removal—are realized, which not only refines the product grains and makes the longitudinal and transverse properties uniform, but also improves the geometric dimensional accuracy and internal and external surface quality of the steel pipe.

This invention discloses an integrated forming device and process for unidirectional semi-enclosed flanges with variable wall thickness. The forming device includes a mold base, a pressing mechanism, and an ejector mechanism. A die is fixedly mounted on the top surface of the mold base, and a die slip ring is damped and slidably fitted on the top of the straight-wall forming cavity of the die. A lower die and a secondary ejector mechanism are fixedly connected to the ejector mechanism, and an outer ring of the lower die is fixedly connected to the secondary ejector mechanism. An inner punch and a secondary pressing mechanism are fixedly connected to the pressing mechanism, and a punch slip ring is damped and slidably fitted on the outer side of the top of the inner punch. An outer punch is fixedly connected to the power output end of the secondary pressing mechanism. A high-sizing band and a low-sizing band of different heights are pairedly arranged at the bottom of the inner wall of the die and the bottom of the outer wall of the inner punch. This invention achieves high-precision, high-yield near-net-shape forming of flanges with complex characteristics such as uneven wall thickness, thin walls, and unidirectional semi-enclosed structures, fundamentally solving the problems of controllable metal flow, reasonable load distribution, and coordinated control of geometric accuracy.

The present application relates to the field of mandrel manufacturing, and discloses a mandrel manufacturing method using roll forging blanking and closed die forging, comprising the following steps: S1: selecting a metal blank and heating to a forging temperature; S2: feeding the heated blank into a roll forging machine for multi-pass roll forging, so that the blank is gradually deformed into a preformed blank close to the final shape; S3: feeding the roll-forged preformed blank into a closed die forging die for finish forging forming to obtain a mandrel forging; S4: first normalizing the forging using the residual heat of the closed die forging, and then cooling; S5: quality inspection of the cooled forging, and storage after passing the inspection. By implementing equal cross-section stabilization in the last pass of roll forging, metal flow line folding defects can be reduced, filling and load fluctuation can be reduced, and volume distribution can be more stable, which is beneficial to the size consistency of one-time closed die forming. Direct feeding of the closed die without secondary heating can shorten the process chain, reduce oxidation and energy consumption, and improve the efficiency.

This invention discloses a staged pressurized hydraulic precision push-forming device for steel pipe ends, which relates to the field of metal pipe processing technology. This staged pressurized hydraulic precision push-forming device for steel pipe ends decomposes the processing of irregularly shaped flanged ends into two independent stages: low-pressure pre-forming and high-pressure finishing. In the pre-forming stage, applying a lower initial pressure guides the material to achieve stable plastic flow, effectively controlling the metal flow rate and avoiding material accumulation and circumferential compressive stress instability at the pipe edge caused by single high-pressure forming. This suppresses the generation of flange burrs and wrinkling defects from the process source. In the finishing stage, switching to a high-pressure shaping component and applying a second-level set high pressure ensures that the pre-shaped contour fully conforms and eliminates internal residual elastic strain, significantly improving the problems of unexpected springback and secondary deformation after pressure relief and ensuring the contour accuracy of the irregularly shaped end.

This invention relates to the field of automotive technology and discloses a forging process for an integrated automotive steering knuckle based on multi-directional die forging. The process includes the following steps: Step 1, raw material preparation, selecting aluminum alloy or alloy steel as the billet, the billet having a diameter of 100-200mm and a length of 300-500mm, and performing surface cleaning and pretreatment. The billet is selected from 6061 aluminum alloy or 42CrMo alloy steel. Step 2, preheating treatment, by adopting a multi-directional die forging process, pressure is applied synchronously or sequentially from multiple directions by the upper die, lower die and side punch, so that the billet generates sufficient plastic flow in three-dimensional space, thereby ensuring that the metal flow lines are continuous and complete and tightly fill the mold cavity. This can solve the problems of discontinuous material flow lines and internal defects caused by traditional processes, and improve the fatigue strength and reliability of the product under complex alternating loads.

The present application relates to the technical field of steel metallurgy and metal rolling, in particular to a billet rough rolling and spreading method and system, comprising: a step of constructing a non-uniform deformation zone geometry: configuring a special-shaped pass based on a flow resistance gradient, and establishing a non-uniform hydrostatic pressure field; a step of executing forced transverse flow deformation induced rolling: forcing the metal to actively migrate in transverse mass from the center to both sides; a step of collecting lateral pressure rheological response data: monitoring width and resistance fluctuations and calculating lateral pressure rheological response lag time; a step of implementing dynamic lateral pressure adaptive control: applying dynamic lateral pressure to the intermediate billet based on the lag time, suppressing overturning instability and correcting the spread; the present application changes the direction of the minimum resistance of metal flow, solves the problem of time and space asynchronization between the system and flow deformation, and ensures the rolling stability of the non-steady state section.

The application discloses a kind of rotor cup machine shell bearing chamber bearing hole periphery R angle forming local material thickening process, by pre-stretching, main stretching, pre-punching bearing hole, back to mound and shrinkage back mound, final stretching finishing these six steps are completed.The application process optimizes the distribution regulation and control of metal flow in the plastic deformation process of stretching forming material and controls the quantitative flow of material, realizes the integral thickening of the material in the bearing chamber area, realizes the accurate control of material flow, thereby realizes the directional thickening of local material, and the shell product prepared is locally increased in thickness by more than one time of the original material thickness at the bearing hole periphery R angle of bearing chamber, while ensuring that the wall thickness of bearing chamber is only slightly thinned, to ensure that the rotor cup machine shell is completed and the forming quality is improved, and the product reaches higher mechanical strength, dimensional accuracy and surface quality.

A spinning processing method of a super high strength steel large diameter cylindrical part, the present application realizes high precision spinning forming of the super high strength steel large diameter cylindrical part through the forming method of first pass, second pass continuous spinning + intermediate annealing + third pass, fourth pass continuous spinning by a three spinning wheel vertical numerical control powerful spinning machine. The present application is more stable in metal flow during powerful spinning process, realizes iterative optimization of product processing process precision, and the processed cylindrical part has good apparent quality and high precision. The present application defines the heat treatment opportunity in the spinning pass of the super high strength steel cylindrical part, eliminates processing stress through recrystallization annealing, improves the fiber state of the structure, restores the deformation plasticity of the spinning cylindrical part, greatly improves the spinning processing efficiency of the large diameter 31Si2MnCrMoV super high strength steel cylindrical part under the premise of ensuring the internal and external quality of the cylindrical part. The present application lays a technical foundation for the batch application of 31Si2MnCrMoV super high strength steel in the manufacture of large light weight ultra-thin high strength shell.

This utility model discloses a hot forging ejection structure and equipment, belonging to the field of automotive technology. The hot forging ejection structure is installed within a forging forming device and is used for ejecting forgings. It includes: a lower die with a lower ejector rod that slides up and down within the lower die; and an upper die with an upper ejector rod that slides up and down within the upper die, with the upper and lower ejector rods positioned opposite each other. The lower surfaces of the upper die and the upper ejector rod serve as upper forming surfaces, contacting the upper surface of the forging. The upper surfaces of the lower die and the lower ejector rod serve as lower forming surfaces, contacting the lower surface of the forging. The upper surface of the lower ejector rod contacts the planar portions on the left and right sides of the lower surface of the forging. This utility model repositions the ejector rods to locations with low stress, later stress, and less intense metal flow. During the forging process, the ejector rods are no longer subjected to lateral reaction forces. With two symmetrical ejector rods on both the upper and lower dies, the ejector rods no longer jam due to upsetting and bending, reducing the scrap rate.

The application relates to the field of closed multi-directional die forging, in particular to a use method of a multi-directional die forging process forming die for a balanced elbow forging. An upper shaft type cavity is arranged on one side of the bottom surface of an upper die core, a lower shaft type cavity is arranged in the middle of the top surface of a lower die core, an upper inclined rib type cavity is arranged on the bottom of the upper die core, a lower inclined rib type cavity is arranged on the top of the lower die core, the upper inclined rib type cavity and the lower inclined rib type cavity form a complete inclined rib type cavity when the die is closed, the two ends of the inclined rib type cavity are communicated with the lower shaft type cavity and the upper shaft type cavity respectively, a through cavity is arranged between the top of the upper die core and the side of the upper inclined rib type cavity away from the upper shaft type cavity, an upper punch is slidably connected in the through cavity, a slide way communicated with the inclined rib type cavity is arranged on the bottom of the upper die core and the top of the lower die core and close to the side of the upper shaft type cavity, and a horizontal punch is slidably connected in the slide way. The forging has full-size precision, reasonable deformation and perfect metal flow lines, the forging forming quality is excellent, the comprehensive performance is excellent, and the service life of the balanced elbow is prolonged.

The application discloses a forging-rolling integrated manufacturing method of high-toughness heavy steel plate, and belongs to the technical field of heavy steel plate manufacturing methods.The steel ingot is obtained through molten steel smelting-mold casting, then 1-2 times of forging and 1 time of hot rolling are carried out to obtain multiple heavy steel plates, the heart loose defects of the steel ingot are forged through the forging process, the material density is improved, meanwhile, the multidirectional staggered metal flow lines are constructed in the blank, and the as-cast structure directionality is eliminated; the hot rolling process improves the forming efficiency, reduces the steel plate allowance, retains the transverse flow line structure of the blank, realizes the homogeneity of the full-section material of the heavy steel plate and the refinement of the structure, and makes the strength and toughness match optimal. The method can greatly reduce the manufacturing cost, realizes the balance control of quality and cost, the ultrasonic flaw detection of the manufactured heavy steel plate can meet the grade I requirement of the NB / T47013.3 standard, meanwhile, the mechanical properties in each direction of the steel plate are relatively uniform, the longitudinal and transverse tensile strength and impact energy deviation are small, and the stability and reliability of the heavy steel plate are ensured.

The present application relates to the technical field of slotting, and discloses a vertical slotting machine, which solves the problems of easy damage, burr and high cost of high-end equipment in the prior art. The core of the slotting machine includes a slotting machine module, which is provided with a rotating chuck for clamping and driving the product to rotate, and a clamping jaw with a roller structure for holding the upper part of the product and allowing the product to rotate; two groups of symmetrical cutter supporting and moving mechanisms are respectively loaded with a spinning forming wheel and a spinning wheel, the spinning forming wheel is provided with a groove profiling protrusion, and the two wheels are respectively provided with extrusion parts on the upper and lower sides of the groove to ensure the radial flow forming of the material. The present application adopts a spinning forming process, has no burr and high machining precision, does not cut off the metal flow line, has high product strength, and has low equipment cost, and is suitable for high-precision slot processing of various hollow thin-walled pipe parts.

The application discloses the technical field of spinning forming and particularly relates to a gradual wall thickness forming method for a spinning part. First, according to the material quality requirement of the spinning part, a metal plate or a pipe material meeting the requirement is selected as a blank, and the initial size of the blank is calculated and determined according to the final gradual wall thickness parameters of the spinning part and in combination with the material thinning law of spinning forming. Then, the inner and outer surfaces of the blank are polished and treated to remove oil stains. Subsequently, lubricant is evenly applied to the inner surface of the blank and the surface of a subsequent spinning die to be used. Then, the blank after surface treatment is placed into an annealing furnace, and annealing parameters are set according to the material quality of the blank. Based on the above, the application has the effects of realizing smooth and continuous gradual change of wall thickness, avoiding step-like mutation, ensuring continuous metal flow lines and optimizing stress distribution through layered continuous pass design and core mold guide groove guidance.

The application discloses a spiral metal flow line structure valve forming method, which comprises a valve body, the valve body is integrally formed, and the valve body is twisted into a three-dimensional space spiral metal flow line arranged around the axis of the valve body from inside to outside; the three-dimensional space spiral metal flow line under the same section forms several arc lines arranged at intervals and spirally diffused to the outer periphery with the center of the valve body as the center. The spiral metal flow line structure valve and the forming method thereof disclosed by the application twist the valve body to form the internal organization metal flow line into a three-dimensional space spiral curve, so that the curve is arranged around the axis of the valve body, the consistency of the material itself structure of the whole valve is ensured, the structural strength of the valve is higher, and the plastic deformation resistance, the bending resistance and the fatigue resistance of the valve are effectively improved.

The C content in the chemical composition of an electric resistance welded steel pipe (1) according to the present disclosure is 0.19-0.35 mass%, and the tensile strength of the electric resistance welded steel pipe (1) is 1700 MPa or more. In a cross-section perpendicular to the pipe axis direction of a metal flow rising portion (3), a metal flow angle (AN), which is an angle between the outer circumferential surface of the metal flow rising portion (3) and a metal flow on the outer circumferential surface side, is 35-80°. In the cross-section, the hardness ratio RH of the average hardness (GPa) in a band-shaped region having a hardness of 8.5 GPa or more, obtained by a nanoindentation method, to the average hardness (GPa) in a band-shaped region having a hardness of 7.5 GPa or less is 1.8 or less. The FN value defined by equation (1) using the metal flow angle (AN) and the hardness ratio RH is 130 or less.　(1): FN = ANRH

The application discloses a fuel cell visual testing device. The metal flow field plate and the cathode end plate are respectively provided with hollow channels, and the visual window body is encapsulated by a window protection sleeve and placed in a rectangular groove. The visual window body and the encapsulated end plate are both transparent bodies, and the combination forms a constant temperature chamber. Four end surfaces of the cathode end plate are symmetrically provided with constant temperature gas and reactant inlet and outlet ports. The metal foam is compressed in the conductive area of the metal flow field plate, and the uncompressed part forms a metal foam flow field by the combination of the metal flow field plate and is used as a visual fuel cell unit. The anode end plate, the anode current collector plate, the anode graphite plate, the membrane electrode assembly, the metal flow field plate, the cathode end plate and the encapsulated end plate are sequentially fastened and sealed. The device can effectively and accurately reflect the liquid water transmission and distribution in the flow field of the fuel cell. The hollow area of the metal flow field plate can be changed to different areas or different flow field shapes according to the testing requirements, so that the on-line visual testing of the fuel cell is realized.

The application provides a multi-cavity high-pressure-bearing aluminum profile section rapid extrusion forming method, and belongs to the technical field of aluminum profile processing.The application realizes real-time calculation of metal flow state and interface evolution characteristics by establishing a heat flow coupling phase field evolution model, obtains constitutive parameters by using a fractional order viscoelastic reverse identification model, outputs an optimal switching time and an acceleration adjustment coefficient based on an artificial intelligence section speed switching time prediction model, starts an S-shaped speed curve adjustment program to realize smooth transition, and suppresses temperature fluctuation and extrusion pressure fluctuation by adjusting cooling water flow in advance and through closed-loop compensation control, and realizes reverse design optimization in cooperation with a die elastic deformation compensation algorithm, so that the technical problem of uneven profile organization caused by temperature field and flow field coupling instability due to improper speed switching time in the section speed extrusion process of the multi-cavity high-pressure-bearing aluminum profile is solved.

The present application relates to the technical field of welding processing energy field regulation, in particular to a welding seam defect global inhibition method of pulse compound magnetic field and ultrasonic synergy. The method comprises the following steps: welding seam working condition positioning and synergy parameter setting; welding seam molten pool applying pulse compound magnetic field; double field space-time synergy coupling regulation; welding process dynamic regulation and defect inhibition. The present application adopts a space partition coupling regulation algorithm of multi-time scale decoupling to complete double field time sequence and parameter matching, allocates differentiated action parameters according to the actual state of the molten pool, and dynamically adjusts the ultrasonic closing time in combination with the solidification front advancing factor, so that the action rhythm of the magnetic field and the ultrasonic can be adapted to the real-time working condition of the molten pool, the regulation and control can be carried out according to the solidification characteristics of different regions, the operation time can be adjusted according to the solidification advancing rhythm, the molten pool metal flow state can be orderly improved, and the welding seam defect generation probability can be steadily reduced.

This invention discloses a high-width elongation forging method for difficult-to-deform high-silicon alloy electroslag remelting round ingots, achieving direct forging and elongation forging with fewer forging passes. Using conventional free forging equipment and ordinary forging fixtures on a flat anvil, with a relatively small round ingot, under six forging passes, the deformation amount and heating temperature range of each pass are optimized and matched. The method combines large reduction and light pressure on the vertical surface in stages to promote width elongation, and controls straightness, chamfering forging angle, step length, and intermediate billet shape, allowing the deformation of the billet to gradually transfer from the surface to the core. The high deformation rate improves the forging microstructure; it ensures sufficient metal flow, allowing the billet to achieve greater deformation in the width direction, achieving stable deformation with a high width elongation; and it uses rolling in key passes to improve surface quality and thermoplasticity. A wide forged billet with good surface quality is obtained using only the elongation forging method, with a width elongation significantly increased by more than 10%.

This invention provides a non-standard toothed insert and its forming apparatus and method, relating to the field of precision plastic forming technology for metal parts. The insert is a one-piece metal part, including a head with a non-standard toothed structure and a thin rod. The toothed structure is integrally formed by cold forging and upsetting, resulting in a complete metal flow line. The forming apparatus includes six sets of molds matched in sequence: a forming mold, a rod-shrinking mold, an upsetting and punching composite mold, a finishing mold, a toothed final forging mold, and a trimming mold. The composite mold achieves punching followed by upsetting through a stepped arrangement of a central punch and an upsetting punch. The final forging mold adopts a split toothed mold core. The forming method includes six corresponding cold forging processes. Through step-by-step forming, hole finishing, high-pressure final forging, and trimming, a high-precision insert is finally obtained. This invention achieves high-quality, high-efficiency, near-net-shape forming of complex toothed structures, resulting in high product strength, high material utilization, and suitability for mass production.

A method for forming a metal flow module includes: stacking a first metal plate together with a second metal plate, the first metal plate having opposed first and second major surfaces and one or more flow channels at least partially defined in one of the first major surfaces, the second metal plate having opposed first and second major surfaces, the plates being stacked together such that their respective first major surfaces face each other with a flux layer disposed between contacting portions of the respective first major surfaces, the contacting portions being defined as those portions of the respective first and second major surfaces that would contact each other in the absence of the flux layer; and then heating the plates together in a non-oxidizing atmosphere to thermally bond the contacting portions of the respective first major surfaces of the first and second metal plates. A resulting module is also disclosed.

This invention discloses a multi-station warm forging process for the intermediate shaft gear of a reducer, comprising the following steps: billet preparation, sawing of bar stock, induction heating, upsetting, pre-forming, final forming, and punching. The process involves upsetting the bar stock in a mold cavity at the first station to form an upset billet; upsetting the upset billet in a mold cavity at the second station to form a pre-formed billet with a web structure on the intermediate shaft gear; forming the pre-formed billet into a helical tooth structure on the intermediate shaft gear in a mold cavity at the third station to form a final formed billet; and punching the intermediate shaft gear's central hole in the final formed billet at the fourth station to remove the connecting layer, thus forming the final warm forged intermediate shaft gear. This invention utilizes a multi-station warm forging process to forge helical teeth, leaving grinding allowance for post-heat grinding, avoiding the cutting of metal flow lines in the gear cutting process, improving the product's fatigue resistance, increasing material utilization, and improving production efficiency. Furthermore, the billet does not require phosphating, making it a green forging process.

This invention relates to the field of hot forging forming technology, specifically to a hot forging die and method for ratchet forgings. The die includes a lower die assembly, an upper punch assembly, and an ejection mechanism. The lower die assembly comprises a lower outer die seat, a lower inner die sleeve, a lower die wedge block, a pre-forging die, and a final forging die. The upper punch assembly comprises an upper outer punch seat, an upper die wedge block, a pre-forging punch, a final forging punch, and an upper inner die sleeve. The ejection mechanism includes a pre-forging lower ejector block, a final forging lower ejector block, a lower ejector plate, a lower ejector rod, and a lower ejection connecting rod. The lower die assembly, the upper punch assembly, and the ejection mechanism integrate two sets of symmetrically arranged pre-forging cavities (left-right) and two sets of symmetrically arranged final forging cavities (front-back). This invention, through modular die assembly, facilitates maintenance and die changeover, improves the adaptability of the production line, and enables the production of high-quality forgings with continuous metal flow lines, dense microstructure, and high mechanical properties and fatigue strength.

This utility model relates to the field of aluminum forming mold technology, and provides a split-assembly extrusion molding mold, including an upper mold and a lower mold; a core column is fixedly installed on one side of the upper mold that connects with the lower mold; the core column is fixedly sleeved onto the mold core. The core column and the mold core are threaded together. A circumferential weld is formed at the junction of the core column and the mold core. A guide plate is fixedly connected to the upper mold; a metal flow channel is opened in the upper mold, and a flow-diverting hole communicating with the metal flow channel is opened in the guide plate. Therefore, this utility model sets the mold core and the upper mold as a split structure, allowing the upper mold and the mold core to be processed separately. The mold core is then sleeved onto the core column and fixed, completing the assembly with the upper mold. This utility model simplifies the structure of the upper mold, reduces processing difficulty, improves processing efficiency, and shortens the mold development cycle.

The application provides a flip LED chip and a preparation method thereof. The electrode structure of the flip chip comprises a connection metal layer, a passivation layer, a protection metal layer and a eutectic metal layer which are stacked in sequence. The passivation layer completely covers the surface of the LED chip, effectively blocking the contact path of water vapor, particles and the like in the external environment and the chip. The passivation layer and the protection metal layer cooperate with each other to form complete isolation of the chip, effectively avoiding the chip being scratched by the particles and metal protrusions on the substrate. Meanwhile, the area of the protection metal layer is larger than that of the eutectic metal layer and the protection metal layer covers the through hole of the passivation layer, and the edge of the protection metal layer exceeds the edge of the eutectic metal layer. When the LED chip is welded to the substrate, the protection metal layer remains solid at the typical process temperature of eutectic welding and does not melt and liquefy, which can effectively block the liquefied eutectic metal from flowing into the chip, and avoid the electrical problems such as leakage and short circuit of the metal in the chip.