11results about How to "Achieving Precise Forming" patented technology

The present invention relates to a device and method for controlling the edge precision of a stir friction extrusion solid-phase additive deposition layer, which belongs to the field of additive manufacturing technology, and includes a hollow stirring head, which can rotate, and a through hole is arranged at the central axis thereof for filling raw materials; four split sleeves are sleeved around the hollow stirring head, and the four split sleeves can move up and down independently. The present invention restricts the side wall forming of the additive layer, suppresses the generation of flash, arc-shaped side walls and semi-cylindrical materials at both ends of the additive layer, thereby reducing the subsequent cutting amount and achieving near-net forming of the component; by restricting the flow of plasticized material to the surroundings, the additive layer at the center and the edge is made denser, and the mechanical properties of the additive layer as a whole and the side wall are improved; it can realize multi-layer additives in the vertical plane and multi-pass additives in the horizontal plane, and can also realize precise forming of the side wall without changing the device, thereby improving the flexibility of the device.

The invention relates to the technical field of metal heat treatment, in particular to a process for realizing diffusion bonding of dissimilar materials through a powder metallurgy process, which comprises the following steps of: controlling the mechanical property, the dimensional accuracy, the surface appearance and the structural integrity of a formed blank through selection of alloy elements, regulation and control of component proportion and optimization of additive components and content; the wear-resistant material powder is pressed into a blank, then the sintering temperature, the sintering time, the sintering pressure and other parameters are used for control, blank forming is achieved, the bonding strength of the blank and parts is improved, a steel-based typical structural part with local high wear resistance is manufactured, the strength and wear resistance of the mechanical parts are greatly improved, and the service life of the mechanical parts is greatly prolonged. The dissimilar material connecting process is suitable for engineering forming design and preparation production of locally-reinforced wear-resistant structural parts such as mining machinery, oil and gas pipelines, ocean platforms and bridge structures.

The utility model discloses integrated head punch shape uses the blank near net shape forming auxiliary, integrated head belongs to the technical field of head manufacturing, the existing technology in which at least one of integrated head manufacturing's demoulding difficulty, production cycle, material utilization rate, complex structure forming difficulty etc.

The application belongs to the technical field of advanced manufacturing and mine machinery equipment, and discloses a preparation method of a full-negative Poisson ratio energy-absorbing component, which solves the problem that the existing energy-absorbing component design cannot meet the high energy-absorbing demand under extreme impact working conditions. The method comprises the following steps: (1) full-parameterization design of a macro-negative Poisson ratio structure based on multi-target Bayesian optimization; (2) preparation and process parameter simulation optimization of a micro-negative Poisson ratio steel forming powder; (3) laser additive-warm subtractive composite preparation of a full-negative Poisson ratio porous structure component; and (4) post-heat treatment of the full-negative Poisson ratio porous structure component and macroscopic and microscopic toughening regulation. The application greatly improves the energy-absorbing efficiency, breaks through the bottleneck of high-precision preparation of a complex interconnected porous structure, and realizes the optimal balance of full-parameterization design and multi-target performance.

The invention discloses a space roll bending short-process manufacturing process and device for an automobile A column. The manufacturing process comprises the following steps that a sectional material is extruded; applying vibration force; the profile penetrates into the first-pass three-roller bending mechanism; the sectional material is continuously fed forwards to finish horizontal bending of the middle section; the front end of the profile is transferred to the side of an inlet of a second-pass three-roller bending mechanism, and the end of the profile enters the second-pass three-roller bending mechanism; the subsequently-extruded section bar passes through a first-pass three-roller bending mechanism straightly; the second-pass three-roller bending mechanism completes vertical bending of the preset section of the profile; the rotary cutting device cuts off the tail end of the profile, and then spray quenching and blanking are carried out; and the profile is fed into an aging furnace to be subjected to aging strengthening treatment. The complete continuous production line is designed, extrusion, bending forming, cooling, rotary cutting, discharging and heat treatment of the profile are synchronously carried out, the production technological process is shortened, the quality and stability of the profile are effectively improved, and the working efficiency of production is improved.

The application discloses a forming method of a large-size high-temperature alloy curved generatrix single-wall section product, which comprises the following steps: preparing a fan-shaped spread material; rolling and bending the fan-shaped spread material to form a conical cylinder by forming and combining welding; performing flanging forming on the conical cylinder, and the flanging angle is 30-35 degrees; performing bulging forming on the product obtained by the flanging forming; and performing solid solution treatment on the product obtained by the bulging forming, and the shape correction is realized by adopting the method of re-bulging forming, so that the springback is reduced. The application further discloses a forming device of a large-size curved generatrix single-wall section product, which comprises a flanging die, a female die and a bulging die; wherein the flanging die and the female die are used for realizing flanging forming; and the bulging die and the female die are used for realizing bulging forming. The product obtained by the application has high shape and size precision, low forming period and manufacturing cost, and small springback of the high-temperature alloy product after forming, and is suitable for batch production of large-size high-temperature alloy single-wall section products.

The utility model belongs to injection mold field provides a kind of injection mold with quick demoulding function, it includes: fixed mould base;Movable mould base, it is movably set in the lower of fixed mould base, and when fixed mould base and movable mould base adhere, product cavity is formed between fixed mould base and movable mould base;Demoulding assembly is set in movable mould base, demoulding assembly includes forming block and demolding block, forming block is located in demolding block, and it is through demolding block and moves to product cavity inside in activity. Compared with prior art, the utility model has the advantages that through the cooperation of forming block and demolding block in demoulding assembly, not only the accurate forming of the internal groove of the plugging head is realized, but also the forming block is moved horizontally by the guide block during the demolding process, so that the formed plugging head can be smoothly demolded from the mold, solving the problem of difficult demolding with ejector rod in traditional mold, reducing the manufacturing cost, and effectively ensuring the smoothness during demolding and the stability of product quality after demolding.

The invention discloses a large-area surface multistage complex microstructure composite forming device which comprises an electric field auxiliary micro-rolling forming mechanism and an electric field auxiliary micro-die forming mechanism, the electric field auxiliary micro-rolling forming mechanism comprises a pulse power source, a feeding mechanism, a roughing roller, a finishing roller and a discharging mechanism, and the feeding mechanism, the roughing roller, the finishing roller and the discharging mechanism are sequentially arranged in the conveying direction. The electric field assisted micro die forming mechanism comprises a die pressing mechanism and pressure equipment located above the die pressing mechanism, the die pressing mechanism comprises a male die and a blank groove formed below the male die, and a plurality of microstructures are formed in the bottom end of the male die. According to the forming device, the rough roller, the finish roller and the pulse power source are arranged on the electric field auxiliary micro-rolling forming mechanism, the surface of a material is subjected to rolling forming twice under the heating condition, a basic structure is obtained, then the material is subjected to multi-stage complex microstructure forming through the male die, and the material is subjected to multi-stage complex microstructure forming. The method is suitable for the technical field of machining and plastic micro-forming.

A micro-corrugated plate laser bending forming device includes a workbench, a two-dimensional moving platform is provided on the workbench, and a machine tool dividing head base is connected to the two-dimensional moving platform by fastening bolts; a main shaft is horizontally passed through the top of the machine tool dividing head base, the left end of the main shaft extends out of the machine tool dividing head base and is connected to a rotating handle, and the right end of the main shaft extends out of the machine tool dividing head base and is connected to a three-jaw chuck through a connecting device; a flat plate fixture is clamped in the three-jaw chuck; the flat plate fixture includes an upper flat plate fixture and a lower flat plate fixture, and a metal plate to be processed is clamped between the upper flat plate fixture and the lower flat plate fixture. The present invention also provides a processing method based on a micro-corrugated plate laser bending forming device. The present invention has a simple process, and can realize the precise forming of small and medium-sized equally spaced micro-corrugated plates without a mold, and reduces the number of back and forth clamping times of the metal plate when the laser is scanned forward and backward. Simple pretreatment of the metal plate can minimize the "edge effect" during laser bending forming.

The utility model belongs to the technical field of drilling tools, and relates to a percussion bit, which comprises an outer-layer percussion head, an inner-layer percussion head, an inner-layer percussion head and an outer-layer percussion head, the inner-layer impact head is coaxially nested in the outer-layer impact head, and a second hard alloy tooth group is arranged on the front end surface of the inner-layer impact head; the slag discharging structure comprises a slag discharging notch formed in the surface of the outer-layer impact head and a slag discharging hole formed in the slag discharging notch so as to discharge broken stones generated in the impact process; each of the first hard alloy tooth group and the second hard alloy tooth group comprises a plurality of hard alloy teeth which are annularly distributed; the first hard alloy tooth set and the second hard alloy tooth set each comprise a plurality of hard alloy teeth in the axis direction of the percussion bit, and the tooth tip of the second hard alloy tooth set does not exceed the slag discharging hole. Through cooperative guiding of the inner-layer impact head and the outer-layer impact head and real-time deslagging design, coring-free accurate hole forming is achieved, the high-altitude rock core falling risk is effectively eliminated, and the construction efficiency is improved.

The application provides an aerogel composite material for 3D printing and a preparation method thereof, and the preparation method comprises the following steps: S1, a base material is vacuum dried to obtain a pre-dried base material, the pre-dried base material is premixed with a foaming agent at a low speed for 5-15 min, and the pre-mixed material is sent into a double-screw extruder to be extruded and granulated to obtain granules one; S2, the granules one are frozen and crushed at a low temperature and sieved to obtain pre-foaming master batches; S3, the pre-foaming master batches, aerogel powder, white oil and a dispersing agent are added into a mixer, stirred at a low speed for 3 min, heated, stirred at a high speed for 15-20 min, and discharged to obtain powder mixtures; S4, the powder mixtures and a foaming agent two are sent into a double-screw extruder to be extruded and granulated to obtain granules two; S5, the granules two are added into an extruder to be melt-extruded to obtain a wire; and S6, the wire is cooled and wound in a constant-temperature environment at 25 DEG C, and vacuum packaged to obtain the aerogel composite material for 3D printing. The aerogel composite material prepared by the application has good heat insulation performance and can meet the personalized manufacturing requirements of complex shapes.