33results about How to "Solve forming difficulties" patented technology

The invention relates to a method for extruding and molding metal powder gelatin, which belongs to the field of metal part preparation in powder metallurgic production technology. The method is characterized by comprising the steps: firstly, premixed liquid with finite concentration is prepared; then, metal powder is added into the premixed liquid to prepare a stable gelatin system; the stable gelatin system is extruded and molded to prepare a blank body; and finally, the blank body is sintered into a part. The invention breaks through the traditional molding technology and can prepare metal products with large sizes and complicated shapes. Compared with the pressure molding, the invention solves the problems of complicated shape limitation and energy consumption caused by overlarge pressure needed by molding, and greatly improves the molding condition. Compared with the injection molding and the hot pressure casting molding which need to be added with a lot of organic binding agents, the method does not need a special degreasing step, has simple technology and can greatly reduce the production cost.

The invention provides a hot-stamping die for an anticollision beam, comprising an upper die and a lower die, wherein the upper and lower dies mainly comprise combined convex/concave dies, cooling systems and a cooling seal ring. The blocks of the combined convex/concave dies avoid the corners and are staggered relatively. The cooling systems adopt drill holes, wherein the diameter of the holes is 8-30mm and the peaks of the holes are 3-10mm distant from the profiles; the two ends of the holes are sealed after hole drilling; runway type water troughs are processed near the places where the block dies are 10-50mm distant from the two end faces; the cooling water enters from one water trough and flows out of the other water trough; and seal grooves are arranged on the cooling water troughs and the cooling water troughs are provided with the seal ring and are externally connected with cooling water pipes.

The present invention relates to a quasi pressure adjusting casting machine comprising a casting kettle, a vacuum baffle, an upper cover, a rapidly locking mechanism, a sealing taper cylinder and a right-angle sealing ring, wherein The upper cover is hinged with an upper cover hinge ear arranged at one side of the casting kettle; the middle of the rapidly locking mechanism is hinged with a locking mechanism hinge ear arranged at the other side of the casting kettle; a groove locked with the upper cover is arranged on the upper end of the rapidly locking mechanism, and a swelling force spring connected with the casting kettle is arranged at the lower end; both ends of the swelling force spring are respectively fixed on the casting kettle and the rapidly locking mechanism; the right-angle sealing ring is arranged in the vacuum baffle, and the vacuum baffle is covered at an opening at the top of the casting kettle; and the sealing taper cylinder is internally sheathed in the right-angle sealing ring. The present invention solves that aluminum alloy thin wall pieces are difficult to form and the aluminum alloy thin wall pieces always appear the problems of microshrinkage, poor tightness and suppress leakage. The present invention has the advantages of that super-thin aluminum alloy casting pieces can be produced; the strength of casting pieces can be improved about 25%; the toughness of the casting pieces can be improved to 80 % to 100%; the production rate is high; and the equipment cost is tens times as low as pressure adjusting casting equipment.

A forming method and forming mold for a semi-closed thin plate part, the forming mold includes a base and an inner tire, the base is provided with a concave cavity matching the shape of the bottom of the part, and the inner tire contains a left inner tire , the right inner tire and the support core, place the bent part on the cavity of the forming mold base, and then fill the left inner tire, right inner tire and support core in the bent part in turn Cavity, use positioning pins to fix and position the forming parts, and finally disassemble the forming mold, remove the process lugs, and correct the external dimensions of the parts.

The invention discloses an inverse gravity filling forming device of a large-size complex amorphous alloy component, relates to an amorphous alloy casting device, and aims to provide equipment for ensuring the purity of a smelted alloy, overcoming gravity constraint filling casting and realizing relatively rapid solidification and cooling. The inverse gravity filling forming device comprises a smelting cabin, an induction heating system, an inverse gravity filling cabin, an inverse gravity filling riser tube, an amorphous component forming die and a computer control actuator. The smelting cabin is a sealed tank body, the induction heating system is arranged in the smelting cabin, the inverse gravity filling cabin is arranged above the induction heating system and is installed on a shell at the top of the smelting cabin in a sealed manner, the inverse gravity filling riser tube is installed at the bottom of the inverse gravity filling cabin, the amorphous component forming die is installed at the position, above the inverse gravity filling riser tube, in the inverse gravity filling cabin, and the induction heating system, the inverse gravity filling cabin, the inverse gravity filling riser tube and the amorphous component forming die all communicate with the computer control actuator. The invention belongs to the field of casting forming.

The invention relates to the technical field of improvement of the strength of aircraft or high-speed locomotive structural fastener connecting holes and specifically relates to a method for intensifying the strength of an aircraft or high-speed locomotive structural fastener connecting hole in an extruding mode, in particular to a machining method of a split sleeve. The method comprises the following steps that raw materials are selected according to specification requirements of the required stainless steel split sleeve, wherein the raw materials are hard stainless steel plates which are subjected to no heat treatment when leave a factory; and the raw materials are subjected to annealing heat treatment and then subjected to rolling depression and leveled on a roller press according to needs, the thickness is adjusted, and after calculation and blank layout are completed, the raw materials are cut into bar-shaped to-be-machined raw materials. According to the machining method of the split sleeve, heat treatment is adopted for the excessively thicker stainless steel plates subjected to no heat treatment, firstly the thickness is adjusted, then punching blanking and bending and rounding linkage forming reinforcing are performed, and the problem that high-strength stainless steel sheets are difficult to form is solved in the mode that the thickness of the stainless steel plates subjected to heat treatment is adjusted firstly, and then punching blanking and bending and rounding linkage forming reinforcing are performed.

The invention discloses a method for reducing the flow resistance of an interlayer cooling structure of a 3D printing thrust chamber. The method comprises the following steps: firstly, the interlayercooling structure of the thrust chamber is optimally designed, and then a workpiece is formed by adopting a 3D printing technology; the formed interlayer cooling structure of the thrust chamber is treated by adopting an electrochemical polishing and plasma electrolytic polishing technology; and through cooperation of the two technologies, the needed workpiece can further reach the needed performance, rough polishing is conducted through the electrochemical polishing technology, and fine polishing is conducted through the plasma electrolytic polishing technology. According to the plasma electrolytic polishing technology, the surface quality of parts can be improved by adjusting the proportion of electrolyte and the magnitude of current and voltage, initiation and expansion of a crack sourceare effectively reduced, the flow resistance of the interlayer cooling structure of the thrust chamber is effectively reduced, the service condition of the interlayer cooling structure of the thrustchamber under specific conditions is achieved, the problem of workpieces at present is solved, and the application range of the 3D printing technology and a surface modification technology in the aerospace field is widened.

The invention relates to a novel aluminum profile hot extrusion mould for a hand rail, which is mainly used for the hot extrusion of building hand rail profile. The mould comprises an upper mold (1) and a lower mold (2) which are overlaid front and rear, the feeding surface of the upper mold (1) is provided with five flow-dividing bridges (1.2), five flow-dividing holes (1.1) are formed among the five flow-dividing bridges (1.2), the middle flow-dividing hole shrinks from large to small, thus forming a large head and a small head, furthermore, the large head is arranged in the center of the feeding surface of the upper mold (1), and the hole is called a direct impact groove flow-dividing hole (1.1.1). The feeding surface of the lower mold (2) is provided with a welding chamber (2.1), the rear of which is provided with a mold cavity (2.3), and the middle of the mold cavity (2.3) is provided with a groove position (2.3.1) which is arranged directly below the large head end of the direct impact groove flow-separating hole (1.1.1). The bottom of the welding chamber (2.1) is provided with an arc-shaped flow-blocking plate (2.3) in an upward convex way along the cavity wall of the mold cavity (2.2). The mould ensures adequate feeding at the groove part of the mold cavity of the lower cavity and the uniform discharging of the extruded aluminum profile, without the problems of hand feeling and welding strips, etc.

The invention discloses a precise molding method for a complex internal flow passage structure. By building a precise molding device for the complex internal flow passage structure and composed of a contour casting die (1), a prefabricated three-dimensional internal flow passage structure (2) and a fusible supporting frame (3), thin-wall metal pipes with high precision and smooth internal surfacesare adopted to be precisely wound into the three-dimensional internal flow passage structure, the high-precision fusible supporting frame is used for realizing precision positioning of a three-dimensional internal flow passage, and the structural position precision of the three-dimensional internal flow passage structure can be kept in the casting process. By utilizing differences between the three-dimensional internal flow passage structure and a three-dimensional outer contour structural material in melting points, erosion and deformation of the interior of the three-dimensional internal flow passage can be avoided. According to the precise molding method for the complex internal flow passage structure, the problems that in general manufacturing methods, the functionally integrated internal flow passage structure is difficult in a complex internal flow passage molding, low in percent of pass, poor in surface precision of the internal flow passage and the like are solved.

The invention discloses a roller press forming method of a low-plastic alloy ultra-large deformation thin-wall pipe. The roller press forming method comprises a main shaft, a limiting support and a power device, and further comprises a roller-wave device and a shaping device, the roller-wave device comprises a plurality of roller-wave supports and a variable-diameter mandrel, and roller-wave diessare arranged on the roller-wave supports; the shaping device comprises a plurality of shaping supports, roller flat dies, a main shaft and the roller-wave supports are arranged on the shaping supports, and the shaping supports are connected with a power device. According to the roller press forming method, the step-by-step rolling mode is adopted in the pre-forming stage of a pipe blank, so thatthe problem that a traditional roller press is difficult to form is solved, and meanwhile, the problem that a traditional roller press tube blank is pressed by multiple waves in a synchronous roller is also solved, and the problem that the transition is thinned due to the fact that materials at the trough position cannot flow into the pipe blank is solved; and in the pipe blank shaping stage, a stepping rolling mode is adopted for machining, the flowing resistance of materials in the deformation process can be reduced, and the materials at each position of the shaped pipe wall can be uniformlydistributed.

The invention discloses a stepping roll-in forming method and a device for a supramaximal deformation thin-wall pipe. The stepping roll-in forming method comprises pipe blank preforming and pipe blankshaping. The pipe blank preforming: rolling waves on the outer surface of a pipe blank to be processed in a stepping roll-in mode; and the pipe blank shaping: flattening the waves on the tube blank in the stepping roll-in mode. The pipe blank is processed in the stepping roll-in mode in the pipe blank preforming stage, so that not only the problem that the traditional roll-in forming is difficultis solved, but also the problem of transition thinning caused by the fact that materials at wave troughs cannot flow into the traditional rolling pipe blank when a plurality of waves are synchronously rolled is solved; and in the pipe blank shaping stage, the pipe blank is processed in the stepping roll-in mode, so that flow resistance of the materials in the deformation process is reduced, and the materials at each position of a shaped pipe wall is uniformly distributed.

The invention relates to a method for forming parts of a conical rubber tube. The method comprises the following steps that 1, a conical pipe blank sleeves a sealing assembly of the conical rubber tube, the sealing assembly with the conical pipe blank is placed in a floating block body of a lower die tire, so that the axes of the two ends of the conical pipe blank are parallel to a working table of equipment, the equipment drives an upper die tire to move downward, so that a floating block body of the upper die tire is in contact with the floating block body of the lower die tire; and 2, forming stage is conducted, specifically, the upper die tire continues to move downward, so as to make the axes of the two ends of the conical pipe blank drop to a preset position and maintain the preset tonnage, a liquid inlet is formed in the sealing assembly, and liquid finally enters the conical rubber tube through the liquid inlet. The invention further provides a device for forming the parts of the conical rubber tube.