14 results about "Cold forming" patented technology

This invention discloses an electric field-assisted spline cold forming method and machine tool; this invention belongs to the technical field of machining and metal plastic forming equipment; it aims to solve the problems of high load, rapid mold wear and poor forming quality in the cold forming of splines of difficult-to-deform materials such as high-strength alloy steel and titanium alloy; the positive terminal of the pulse power supply forms a circuit with the workpiece through the center and the negative terminal through the brush, so that the high-frequency pulse current flows directly through the cold forming deformation zone, inducing the electroplastic effect, reducing the yield strength of the material and improving plasticity; on this basis, the symmetrically arranged cold forming tools apply radial force to the workpiece as the spindle rotates, and the spline teeth are formed by the axial feed and rotation of the workpiece; this method deeply couples electric field softening with mechanical forming, fundamentally reducing the forming load, extending the mold life and improving the spline dimensional accuracy and surface quality.

This invention discloses a hot-spinning composite forming method for thin-walled cylindrical titanium alloy parts based on cold spinning-assisted final forming, belonging to the field of metal material plastic forming. This invention addresses the limitation of deformation under cold forming conditions in titanium alloys due to their high resistance to room temperature deformation and poor plasticity, which easily leads to cracking or surface defects. The invention first preheats the blank, mandrel, and spinning wheel using a flame gun. During the spinning process, an infrared thermal imager is used to monitor the temperature, ensuring a stable spinning temperature for the blank. After hot spinning is completed, a low-speed rotation of the spinning machine spindle combined with low-temperature air cooling ensures uniform cooling of the blank, allowing for rapid transition to the cold spinning process and improving forming efficiency. Simultaneously, this invention employs a larger thinning rate during hot spinning to reduce the number of hot spinning passes, and a smaller thinning rate during cold spinning to increase the forming limit, prevent cold spinning cracking, and improve forming accuracy. This invention meets the increasingly stringent requirements for the comprehensive performance of components in high-end applications.

The invention relates to a method (100) for producing a one-piece vehicle wheel (1), wherein the vehicle wheel (1) has a wheel disc segment (2) and a wheel rim segment (3), and wherein the method (100) comprises: providing (101) a one-piece preform (4) of a metal material, in particular a circular blank (4) of a metal material or a strip (4) of a metal material, wherein the metal material is specified by material quality and / or material thickness; forming a cylinder (5) from the provided one-piece preform (4) of a metal material, wherein the cylinder (5) comprises the wheel disc segment (2) and the wheel rim segment (3); profiling (103) the respective material thickness in different regions of the respective segment (2, 3) of the wheel disc segment (2) and / or the wheel rim segment (3) of the one-piece vehicle wheel (1) based on a cold forming method, in particular based on a spinning forming method.

The present invention relates to a steel sheet suitable as a material for vehicle body members and, more specifically, to: a plated steel sheet suitable not only for hot forming but also for cold forming; a manufacturing method thereof; and a hot press formed member obtained from the plated steel sheet.

The utility model discloses an aluminum foil oil removal equipment field's a kind of cold forming aluminum foil surface oil removal device, including cleaning tank, ultrasonic oil removal tank and drying fan, and the partition is vertically welded in cleaning tank, and the space of one side of partition in cleaning tank is provided with ultrasonic oil removal tank, and the space where ultrasonic oil removal tank is located is provided with third deflection roller and fourth deflection roller respectively in both sides of top, and the top of cleaning tank is above ultrasonic oil removal tank by bolt connection with mounting plate, and the bottom of mounting plate is welded with two groups of mounting bracket, and first deflection roller and second deflection roller are rotatably connected between mounting bracket, and fifth deflection roller is arranged between fourth deflection roller and second deflection roller, and the top of the other side space of cleaning tank is welded with protective box, and the inside of protective box and the inside of cleaning tank are provided with two air outlets from top to bottom, and the drying fan of opposite setting is provided with, the utility model oil removal efficiency is high, and oil removal quality is good, energy -concerving and environment -protective, effectively improve the processing quality of subsequent link.

A production method of a large-thickness high-toughness NM360 wear-resistant steel plate, the chemical composition of the steel plate is as follows: C=0.15-0.17, Si=0.15-0.25, Mn=1.10-1.20, P≤0.008, S≤0.0015, Cr=0.60-0.70, Mo=0.4-0.45, Ni=1.15-1.3, Nb=0.025-0.030, V=0.045-0.050, Ti=0.014-0.020, Alt=0.030-0.060, B=0.0014-0.0020, Ce≥0.0010, H≤0.0015, N≤0.0040, O≤0.0012. The process steps include KR molten iron pretreatment, converter smelting, LF refining, RH vacuum degassing, continuous casting, heating, rolling and heat treatment. The thickness of the steel plate covers 80-120 mm, the surface and thickness section hardness is 330-380 HBW, the core / surface hardness is ≥0.90, the diameter of 6a is 180° cold bending, the impact Akv at-40 ℃ is ≥60 J, the impact Akv at-60 ℃ is ≥40 J, the strength and toughness performance is adapted, and the manufacturing performance of the steel plate cutting, cold forming and welding is excellent.

In particular, the present invention relates to a reinforced three or four armed flange (10) part that is welded to the propeller shaft tube, providing shaft connection on the one hand, and connected to the transmission output with a coupling (20) on the other hand, thus ensuring power and motion transfer, and eliminating the decrease in wall thickness by creating a positive protrusion (13) in the bolt connection areas through cold forming.

A weathering steel for railway vehicle and a manufacturing method thereof, the steel having a composition in weight percentage of C 0.04-0.09%, Si 0.12-0.24%, Mn 0.6-0.9%, P ≤0.015%, S ≤0.006%, Al 0.02-0.04%, Cu 0.15-0.35%, Cr 0.60-0.95%, Ni 0.05-0.12%, Mo 0.03-0.12%, Ti 0.01-0.02%, Nb 0.01-0.02%, N ≤0.006%, 5 ≤Cr / Mo ≤25, balance Fe and inevitable impurities, the steel having a yield strength of 450-620 MPa, a tensile strength ≥600 MPa, an elongation A ≥18%, and an impact energy value at -40 ℃ ≥100 J, and the steel plate having a corrosion resistance under a simulated coal train environment of a corrosion rate ≤0.8 g / m 2 2 per unit area, a corrosion rate ≤55% relative to plain carbon steel under an industrial atmospheric environment, and being particularly suitable for cold forming processes in the production of railway vehicles, and being also suitable for use in equipment such as coal gas pipelines, boiler preheating pipelines and the like which are subjected to acidic medium corrosion.

This invention discloses a hot pneumatic forming process and mold for a 3D bent tubular blank with a flange, comprising the following steps: Step 1, optimizing the product design to verify that it meets the flange forming conditions; Step 2, bending the tube blank; Step 3, placing the bent tube blank in a pre-forming mold for flange pre-forming; Step 4, placing the pre-formed tube blank in a hot pneumatic forming mold for flange hot pneumatic forming. This invention overcomes the technical difficulties of flange forming, poor mold adaptability, and insufficient welding strength in traditional processes through segmented control, a combined hot and cold forming process, and innovative mold design, achieving high-precision and high-efficiency forming and meeting the modern automotive industry's demand for lightweight, high-strength structural components.

This invention belongs to the interdisciplinary field of cryogenic sand molding and additive manufacturing technology, specifically relating to a device and method for thermoforming cryogenic sand molds with special binders and cold forming in additive manufacturing. The device includes a support frame, a forming platform, a binder pre-fabrication mechanism, and a printing mechanism. This method effectively improves the penetration ability of water-based binders in molding sand particles by coupling the preheating and insulation processes of the water-based binder. The design of a submerged sand storage tank improves the cold retention effect of the pre-cooled raw sand, while simultaneously optimizing the water-based binder formulation. This device and method can solve the problems of general binder penetration and insufficient precision and strength required by conventional cryogenic sand molding additive manufacturing technology. It enables continuous production of cryogenic sand molds from binder preparation to jet printing, which is of great significance for achieving high-precision and high-efficiency preparation of cryogenic sand molds and promoting the green transformation and upgrading of the foundry industry.

This invention discloses a high-performance wrought magnesium-lithium alloy, comprising the following components by mass percentage: Li 4.8%~5.3%, Zn 5.7%~6.2%, Y 1.8%~2.3%, with the balance being Mg. The alloy is prepared as follows: 1. Raw materials of each component are taken according to the mass percentage of the target magnesium-lithium alloy, and smelted and cast to obtain a magnesium-lithium alloy ingot; 2. The magnesium-lithium alloy ingot is subjected to homogenization heat treatment; 3. After low-temperature preheating, it is subjected to low-temperature extrusion and cooled to room temperature. The magnesium-lithium alloy of this invention, by adding Zn and Y elements, introduces a network W phase, MgZn phase, and MgY phase as reinforcing phases to strengthen the alloy. Combined with the homogenization heat treatment followed by low-temperature extrusion deformation in the preparation process, cold forming capability is increased, and the second phase is effectively broken up, synergistically improving the strength and plastic mechanical properties of the magnesium-lithium alloy, making it suitable for aerospace and other fields.

This invention discloses a NiCr-based precision resistance alloy thin strip and its preparation method. The method includes: 1. Preparing a NiCr precision resistance alloy ingot using three-stage vacuum electromagnetic induction levitation melting; 2. Performing six hot rolling passes on the NiCr precision resistance alloy ingot to obtain a hot-rolled sheet; 3. Annealing the hot-rolled sheet; 4. Performing multi-pass cold rolling combined with intermediate annealing to obtain a cold-rolled thin strip; 5. Performing solution treatment and aging annealing on the cold-rolled thin strip to obtain the NiCr-based precision resistance alloy thin strip. This invention significantly improves the cold forming and cold working properties of the alloy by precisely controlling the hot rolling temperature, cold rolling deformation, and the entire heat treatment process, effectively suppressing edge cracking defects during rolling. The prepared NiCr-based precision resistance alloy thin strip possesses excellent characteristics such as uniform thickness, smooth surface, and stable electrical properties, making it suitable for high-end applications in aerospace, precision instruments, and electronic information.

The utility model relates to mould processing technical field and disclose a luggage storage box cold forming die -cut mould, including lower mould shell, the inside fixed connection of lower mould shell has two groups of ejection assembly, the bottom of lower mould shell is connected with the bottom plate, the top surface fixed connection of bottom plate has two groups of buffer assembly, two groups ejection assembly all include fixed connection in the inside of lower mould shell two groups of ejection hydraulic rod, the top surface fixed connection of two groups ejection hydraulic rod has the ejection plate. The luggage storage box cold forming die -cut mould, through the setting of buffer assembly, when carrying out die -cut, upper mould shell drives moving rod to move, and moving rod moves on the outside of guide rod, and when moving rod moves, buffer spring is extruded, and buffer spring absorbs the impact force produced, thereby reducing mechanical vibration and noise, and the rigid structure of mould and equipment is protected from the damage of instantaneous high load.

According to one aspect of the present invention, provided are a steel sheet suitable for cold forming due to having excellent bendability while having ultra-high strength and high ductility, and a manufacturing method thereof.