5results about How to "Achieving Precise Forming" patented technology

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 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 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.