242results about How to "Small forming force" patented technology

The invention discloses a novel laser indirect impact micro-forming device and method. The device and method are mainly applied to plastic forming technique and manufacturing of fine micro parts. The device and method solve the problem that a conventional laser impact micro-forming method is difficult in forming, and materials cannot be formed. The device comprises a mold-debug light spot centering assembly, a workpiece positioning assembly, a workpiece assembly, an Nd:YAG pulsed laser system used for impact forming, a CW optical fiber laser system used for heating, an ultrasonic vibration system and a control system. The device can achieve the aim that pulsed laser impact force is adopted to serve as an energy source, meanwhile, ultrasonic vibration is applied to a mold and a workpiece, or, a laser beam sent out by a CW optical fiber laser is used for carrying out non-contact type quasi-static heating on the surface of the workpiece, or, under the joint effect, workpiece micro-forming is achieved; due to the design, work efficiency is improved, design is reasonable, control performance is good, quality and precision of micro-forming parts are ensured, and the device is suitable for industrialized application.

The invention provides a cryogenic forming method for a large-size aluminum alloy tailored blank component. A refrigerant is used for cooling an aluminum alloy tailored blank to reach an ultralow temperature interval, the temperature of a weld joint zone is made to be lower than the temperature of a base metal zone, and a mold is used for forming the large-size aluminum alloy integrated curved-surface component. The cryogenic forming method for the large-size aluminum alloy tailored blank component has the following technical advantages that (1) the forming limit is high, differential temperature forming of the aluminum alloy tailored blank at ultralow temperature is adopted, the characteristic that the plasticity and strength of the weld joint zone are higher than those of the base metalzone is used, the problem of cracking caused by the large deformation amount of the weld joint zone is avoided; (2) the structure property is good, the structure property is basically not changed in the forming process at ultralow temperature, the original structure state is recovered after forming, and damage to the internal structure is not generated; and (3) the forming load is low, cryogenic lubricating layers are formed on work faces of the tailored blank and the mold, the friction resistance and forming force of the blank are lowered, the tonnage and manufacturing cost of large equipmentare reduced, and the cryogenic forming method is suitable for various large-size aluminum alloy integrated thin-wall curved-surface components in the aerospace field.

The invention discloses a drawing compound molding die for a shell with a tooth form on a side wall. The drawing compound molding die comprises an upper die component and a lower die component which can move relatively, wherein the upper die component comprises an upper die holder and a female die fixed on the upper die holder; the lower die component comprises a lower die holder and a male die fixed on the lower die holder; the female die is provided with an inner die cavity for molding the shell; the inner die cavity comprises a lower drawing section and an extruding section which extends upwards; the drawing section is cylindrical, and is in smooth transition with the extruding section; the circumferential wall of the extruding section is provided with a tooth form; the male die is cylindrical, and can extend into the inner die cavity of the female die; and the circumferential wall of the male die is provided with a tooth form which corresponds to the tooth form of the extruding section. The drawing compound molding die has the advantages of simple structure, easiness for assembling, low molding force and long service life, and is suitable for drawing and molding a shell part with a tooth form on a side wall.

The invention discloses a rotary ultrasonic compound incremental forming device and method based on real-time feedback. The rotary ultrasonic compound incremental forming device comprises a plate incremental forming fixture unit. A rotary ultrasonic cutter handle machining unit is arranged above the plate incremental forming fixture unit. The rotary ultrasonic utter handle machining unit comprises a machining main shaft which is connected with an installation taper shank. An ultrasonic energy exchanger is arranged in a cylindrical hole of the installation taper shank. An electrode copper sheet of the ultrasonic energy exchanger is connected with a receiving coil of a magnetic receiver through a wire, a magnetic generator is arranged opposite to the magnetic receiver, and the magnetic generator is connected with the magnetic receiver. The ultrasonic energy exchanger is connected with an amplitude transformer, and the amplitude transformer is connected with a forming tool head. An annular groove is formed in the outer circle of the amplitude transformer, the annular groove is used for sticking a strain gage serving as a power sensor, the strain gage is connected with a signal acquiring and emitting module, and the signal acquiring and emitting module is connected with an information processing and displaying device.

The invention discloses a multi-purpose double-roller continuous rheological forming device for liquid metal, which is mainly used for double-roller continuous rheological forming of plates, strips, pipes, profiles, wires, composite materials and wrapping materials. The device consists of a motor, a half coupling, a decelerator, a gear box, a main machine, a cooling water tank and a coiling machine, wherein the main machine consists of a stander, an upper working roller, a lower working roller, a feeding shoe, an extrusion shoe, a die in a cavity of the extrusion shoe, and rotating speed sensors at shaft heads of the upper working roller and the lower working roller of the main machine. An annular groove of the upper working roller is mutually matched with an annular lug boss of the lower working roller. The feeding shoe is arranged at the feeding end of the main machine, and the feeding shoe and the annular groove of the upper working roller form a feeding cavity. A metal material enters into a roller gap between the two working rollers through the feeding cavity. When producing pipes, profiles, wires and wrapping materials, the extrusion shoe is arranged at the discharging end of the main machine, and an extrusion forming die can be arranged in the cavity of the extrusion shoe. The device can realize quick continuous rheological forming of the liquid metal, and can also be used for direct forming of a semi-solid metal material.

The invention relates to a device and a method for preparing magnesium alloy semi-solid blank through repetitive upsetting-extrusion deformation and isothermal annealing, belonging to the field of metal semi-solid forming technology and mainly aiming at solving the problems that the magnesium alloy semi-solid blank prepared by the existing strain inducement method is greatly changed in shape, has high technology cost, and low production efficiency. The repetitive upsetting-extrusion device mainly comprises a pair of buckled half module female die cavity and upper upsetting lower extruding male die. The method comprises the following steps of putting a cast magnesium alloy bar material into the device for repetitive upsetting extrusion deformation for many times, so as to have enough accumulated inducing strain; and carrying out isothermal annealing treatment on pre-deformed blank, thus obtaining the magnesium alloy semi-solid blank through controlling the annealing temperature and time reasonably. According to the method, the original appearance shape of large strain pre-deformed blank can be guaranteed to be accumulated, the obtained magnesium alloy semi-solid issue has fine and uniform solid phase grains and good degree of sphericity, and the method is simple, has low cost and has high production efficiency.

The invention relates to a thermal vibrating integrated incremental forming device for a magnesium alloy thin-wall part and a forming technology thereof. The device comprises an industrial manipulator, a heating box, a cooling box, a vibration generator, an amplitude-change pole, a tool head and a blank pressing block, wherein the blank pressing block for pressing the magnesium alloy thin-wall part is screwed to the side edge of a heating port in the upper end of the heating box; the cooling box is mounted at the lower end of the heating box; the vibration generator is mounted at the tail endof the industrial manipulator; the upper end of the amplitude-change pole is fixedly connected to the output end of the vibration generator, and the lower end of the amplitude-change pole is connectedto the tool head which acts on the magnesium alloy thin-wall part. The device is simple and reasonable in structure; the thermal assisted and vibrating assisted plastic processing modes are combined;the low-amplitude vibrating point pressing formation of the magnesium alloy thin-wall part can be realized through a frequency-adjustable and amplitude-adjustable vibration generator. Therefore, theformation limit and the formation quality of a magnesium alloy material can be improved; and moreover, the formation technology chain of the magnesium alloy thin-wall part is shortened, and as a result, the short plastic processing process is achieved.

The invention relates to a precise forming method of a straight/helical tooth cylindrical gear. The precise forming method disclosed by the invention is characterized by being realized by the following two steps while a 'diameter-increasing half long ridge-tooth space splitting' way is adopted: firstly, closed die forging is carried out on cylindrical blank to form a pre-formed part, wherein one end of the pre-formed part is larger in radial dimension, sectional area and edge axial dimension and the other end of the pre-formed part is equal to the required value of the sectional area and has slightly smaller radial dimension, the two ends transit in a bevel angle manner, and a cylindrical surface is in a 'diameter-increasing half long ridge' state; and secondly, the pre-formed parts penetrate through a final forming die each tooth space of which is correspondingly provided with a splitting wedge in a sequence from big end to small end, wherein a splitting edge and a working surface of the splitting wedge are in a tilted state, a rim is split, extruded and deforms, and each slot base is deepened and the top of each ridge is lifted, thus a gear tooth with complete tooth profile is obtained. The gear tooth/tooth space obtained by the invention is clear and full, a required forming force is relatively small, an equipment action is simple, a structure of a die is not complex, a workpiece is easy to demould, requirement to technological conditions is low, and adaptability is wide.

The invention discloses a local loading forming-based optimization method for a preformed blank of a rib plate part. Isothermal local loading forming is realized by controlling material flow and macroscopic defects of a transitional region. The preformed blank subjected to optimization design can effectively improve the uniformity of the material flow, reduce transverse material flow of a cross rib in the transitional region, and improve the filling capability of a rib type cavity. In engineering application, the usage performance of members is improved, the production cost is reduced, and a foundation is laid for forming and integrated manufacturing of large complex members made of titanium alloy.

The invention discloses a designing method for a cross wedge rolling mould of a conical surface stepped shaft part. The designing method comprises the following steps of: 1, designing a structure of the cross wedge rolling mould, wherein the cross wedge rolling mould consists of four parts, namely a wedge section with the length being L, a first widening section with the length being L1, a second widening section with the length being L2 and a shaping section with the length being L3, and the four parts are connected integrally on a template; and the first widening section, the second widening section and the shaping section have the same thickness, and the thickness is equal to a wedge top height (h) of the wedging section; 2, designing the wedging section with the length being L, wherein L=hcot(alpha)cot(beta), h=r1-r0+delta; 3, designing the first widening section with the length being L1, wherein L1=ecot(beta); 4, designing the second widening section with the length being L2, wherein L2=(L1-e)cot(beta); and 5, designing the shaping section with the length being L3.

The invention discloses a method for machining a thin-wall shell part with inner and outer teeth and relates to a plastic machining method. The method includes the following steps that firstly, slab blank is machined to be cup-shaped prefabricated blank, and the thickness of the wall of the cup-shaped prefabricated blank is equal to that of the wall of the thin-wall shell part with the inner and outer teeth; secondly, a pair of gears which are meshed mutually and are used for forming the inner teeth and the outer teeth of the thin-wall shell part with the inner teeth and the outer teeth respectively are manufactured. The gear for forming the inner teeth of the thin-wall shell part with the inner and outer teeth is a carrier roller, and the gear for forming the outer teeth of the thin-wall shell part with the inner and outer teeth is a compression roller; thirdly, the cup-shaped prefabricated blank is clamped on the carrier roller, and therefore the cup-shaped prefabricated blank and the carrier roller rotate synchronously, and meanwhile, the compression roller synchronously and oppositely rotates with the carrier roller and is fed in the radial direction close to the carrier roller to finish forming of the thin-wall shell part with the inner and outer teeth. According to the method for machining the thin-wall shell part with the inner and outer teeth, the technological steps are simple, the production cost is low, the machining efficiency is high, and high practicability is achieved.

The invention discloses a single-point incremental forming tool head axial vibration device. The device comprises a supporting frame and a tool head with a push rod. A spring and two guide posts are connected to the inner bottom of the supporting frame. The spring is located in the center. The two guide posts are located on the left side and the right side of the spring correspondingly. The tool head with the push rod is composed of a tool head body arranged horizontally and the protruding push rod perpendicularly and fixedly connected to the tool head body. The upper end of the spring and the upper ends of the two guide posts are all connected with the tool head body. The upper portion of the protruding push rod is connected with a sleeve. A gap is reserved between the tool head body and the bottom surface of the sleeve. The upper portion of the sleeve is clamped to one end of a tool holder of a machine tool. The other end of the tool holder of the machine tool is connected with a rocker arm of the machine tool. According to the single-point incremental forming tool head axial vibration device, the tool head with the push rod is driven through rotation of a machine tool spindle to generate axial vibration, so that original continuous extrusion friction motion is converted into high-frequency point pressure motion, deformation processing is facilitated, and forming force required in the forming process is reduced.

The invention relates to a gradual type laser shock continuous riveting method and device and belongs to the technical field of material connection. The method and device are used for linear riveting between boards. The method includes the steps that A, a laser device is used for directly generating multiple beams of lasers or a beam splitting system is used for generating the multiple beams of lasers; B, a V-shaped included angle is formed between the extending lines of every two laser beams, and the boards are swept through the multiple beams of lasers at the same time; C, when the pulse lasers act on the surfaces of the boards, exploding plasma is generated, and each board gradually deforms to be of a groove structure under the shock effect of the exploding plasma and with the cooperation of the restraint of a forming die; D, the arranging manner of the multiple beams of lasers is adjusted, so that the laser beams are aligned with the two sides of the bottom of each groove structure; and E, the multiple beams of lasers move; under the continuous shock effect of the exploding plasma, the laser beams are matched with the restraint of the forming die, so that the groove structures are gradually shocked into interlocking structures; and the step B to the step E are repeated, the boards are gradually shocked, and therefore the boards are riveted together.

The invention discloses an extrusion forming die for a thin-wall near-contoured chevron light alloy member, which comprises an upper die component, a lower die component, an ejection device, a material ramming device, a fixed component and a movable component, wherein the upper die assembly comprises an upper die plate, a male die fixed ring, a first pass male die and a second pass male die, the first pass male die and the second pass male die are interchangeable, the lower die assembly comprises a lower template, a female die, a middle female die and a mandrel, the middle female die and the mandrel are interchangeable. When the upper die assembly is assembled with the first pass male die, the female die is correspondingly provided with the middle female die, a middle male die is providedwith a discharging channel, and a lower annular wall is extended out of the lower section of the discharging channel. The ejection device comprises an ejection block and an ejector rod. The material ramming device comprises a material ramming plate. The fixed component and the movable component comprise an umbrella cap, a cylindrical pin, a fixed block, a hanging erbium and a chain. According to the extrusion forming die for the thin-wall near-contoured chevron light alloy member, the precise plastic forming of the thin-wall near-contoured complex chevron member is achieved, the problems brought by the traditional processing and manufacturing die are effectively overcome, the formability of the light alloy is improved, the comprehensive mechanical property of the formed member is improved, the material utilization rate is greatly improved, the energy is saved and the consumption is reduced.

The invention relates to a multi-pass multi-direction rotary rolling forming method of a large-scale transversely high-rib thin-wall ring component. The method comprises the following steps that S1, an annular blank and an annular push plate are sleeved on a constraint die, two rotary wheels which are symmetrical about the axial middle surface of the annular blank are in close contact with the twoend faces of the blank correspondingly, so that acting force is generated between the constraint die and the annular blank, and it is guaranteed that the constraint die can drive the annular blank and the rotary wheels to stably rotate; S2, the constraint die drives the annular blank and the rotary wheels to rotate around the self-axes correspondingly, and meanwhile, the two rotary wheels do feeding motion along a track, so that continuous local plastic deformation of the annular blank is generated until the annular blank is integrally formed; and S3, when the shape of a forming part is the shape of the target transversely high-rib thin-wall ring component, the constraint die stops rotating, the two rotary wheels return to the initial position, and the manufactured target transversely high-rib thin-wall ring component is pushed out from the constraint die through the annular push plate. According to the multi-pass multi-direction rotary rolling forming method, the large-scale transversely high-rib thin-wall ring component is locally formed through multiple passes, the method has remarkable effects of saving energy and material, reducing production cost, improving productivity andreducing forming force.

The invention relates to a high-strength steel rolling hot-forming technology. The high-strength steel rolling hot-forming technology comprises the following steps of: (a) hot-forming of a steel belt, wherein the steel belt comprises the following components in parts by weight: 0.007-0.33% of C, 0.02-0.05% of Al, 0.001-0.005% of B, 0.16-0.37% of Cr, 0.75-1.21% of Mn, 0.004-0.006% of N, 0.01-0.1% of Ni, 0.20-0.40% of Si, 0.03-0.05% of Ti and the balance of Fe and inevitable impurities; (b) uncoiling: cutting the hot-formed steel belt into sheet materials with the length and width which are required for products; (c) forming: transferring the sheet materials into rolling and forming equipment, and performing the sheet materials into semifinished products at a room temperature; (d) heating: controlling heating temperature to 800-1100 DEG C, and preserving heat for 3-8 minutes; and (e) setting: transferring the semifinished products at a high temperature to setting equipment, carrying out pressure maintaining and quenching under a loading condition, i.e. quenching at a cooling speed of above 27 DEG C/s, cooling to a room temperature, and obtaining a martensitic structure with the tensile strength of above 1500 Mpa by quenching.