48results about How to "Uniform wall thickness distribution" patented technology

The invention relates to an electromagnetism-assisted forming device and method for dissimilar metal composite boards and aims to solve the problem that existing metal composite boards are severely lapped and even broken in a drawing process. According to the forming device, a coil is arranged in an annular coil groove, a liquid channel is disposed between the inner wall of a blank holder and a cylinder, an upper liquid inlet channel is transversely arranged on the side wall of the blank holder, and a lower liquid inlet channel is transversely arranged on the side wall of a female die. The method includes placing the composite boards on the bottom surface of the blank holder; filling forward liquids into the liquid channel, filling reverse liquids into the female die, and exerting radial electromagnetic force Fd on the periphery of a flange of the composite board through the coil; forming the composite board under the combined action of a reverse pressure Fp2, a forward pressure Fp1 and the radial electromagnetic force Fd; and unloading a forward liquid pressure P1 and then a reverse liquid pressure P2, returning a male die and taking the formed part.

The invention discloses a die assembly of metal plate deep-drawing cup shells and shaping process. The invention comprises an upper die holder and a lower die holder, wherein a punch and a cavity die which are mutually corresponded are respectively arranged on the upper die holder and the lower die holder, a discharging screw which is connected with the upper die holder and a flanging spring which is sleeved on the discharging screw are arranged on the outer side of the punch, a blank holder is arranged on the lower end of the discharging screw, a holding frame which is fixedly connected with the lower die holder is arranged on the outer side of the cavity die, a conical pushing block and a rubber pad are arranged in turn in the holding frame from top to bottom, a conical enclasping element which is matched with the punch is arranged in the conical pushing block, a spring holder is arranged on the lower end of the lower die holder, a material squeezing spring is arranged in the spring holder, and a push rod which is extended through the rubber pat, the conical pushing block, and a conical clamping element is arranged on the upper end of the material squeezing spring. The invention carries out enclasping along the side-wall direction during the deep-drawing process of cup shells, material flowing tendency can be changed flexibly and actively, which enables wall thickness to be changed evenly, maximum thinning-out quantity on a dangerous cross portion during the process for drawing can be minimized and drawing breakage can be avoided.

The invention relates to a bidirectional pressing liquid-charging forming method for a large-size thin-wall complex characteristic panel. The method comprises the following steps: coating lubricating oil on a single side of a thin-wall panel, thereby performing lubricating treatment; bulging the panel after being lubricated in advance in a pre-forming mould, thereby forming the rough shape of parts; reversely shaping the pre-formed panel in a shaping mould, thereby forming small circular bead features; cutting off addendum surfaces of the parts, thereby finally forming the parts. According to the bidirectional pressing liquid-charging forming method for the large-size thin-wall complex characteristic panel provided by the invention, the plasticity of the panel is fully utilized, the wall thickness reduction rate of the parts is effectively controlled and the panel parts with any complex shallow characteristics can be formed. Compared with the explosive forming of the traditional similar parts manufacturing method, the bidirectional pressing liquid-charging forming method has the advantages of high efficiency, low cost, convenience and safety in operation, high precision of formed parts, no manual repairing, and the like.

Provides is an overall superplastic forming method of a variable cross-section cylindrical shell. Firstly, blank calculation is conducted, a designed part is equally divided into a plurality of sections through an axial sectioning method, the perimeter of each section is measured, and a cylindrical blank with the perimeter change trend close to the result is prepared according to the result. Then, the cylindrical blank is subjected to hot pressing performing, so that the change trend of the section appearance is close to that of a target part. Finally, overall blow molding is conducted through superplastic forming, and the forming process is completed. The overall superplastic forming scheme is adopted, the overall superplastic forming of cylindrical metal shell-class parts with the variable cross sections is achieved through the forming blank size calculation, forming mold design, hot pressing performing, superplastic finished forming and other processes, and the purposes of improving the integrality, the size accuracy and the wall thickness distribution accuracy of the parts are achieved.

The invention discloses a device and method for hot forming of a titanium alloy corrugated pipe through current assistance, and relates to a device and method for hot forming of a corrugated pipe. The device and method for hot forming of the titanium alloy corrugated pipe through current assistance solve the problem that an existing titanium alloy corrugated pipe is difficult to manufacture, and high in cost and low in production efficiency. According to the device, the positive pole and the negative pole of an electrode (3) tightly sleeve the upper end and the lower end of a tube blank (10), a low-voltage high-current power source (5) is connected with the positive pole and the negative pole of the electrode (3) through a wire (4), a gas cylinder (7) is connected with a gas guide pipe (11) on the tube blank (10) through a gas pipe (6), and a forming die (2) is placed on a working platform of a press machine (1). The method comprises the steps that the first step, the tube blank (10) is manufactured; the second step, die setting is conducted; the third step, device installation is conducted; the fourth step, the corrugated pipe is formed; the fifth step, discharging is conducted; the sixth step, post-processing is conducted. The device and method are used for manufacturing the titanium alloy corrugated pipe.

A cold-hot sequential coupling forming technology of large-scale aluminium alloy complex structural members is a novel forming technology which is derived from the intersection and fusion of liquid-filled forming technology and hot-stamping forming technology. The novel forming technology has the characteristics of liquid filling forming and hot stamping forming at the same time. The cold-hot sequential coupling forming technology comprises the steps that the upper and lower dies are closed, according to adjusting the blank holder force, a panel veneer is impacted between the dies; the panel veneer is attached to die profiles in function of high pressure liquid in a liquid chamber, the forming of most features is completed; and after forming the liquid-filled, according to the characteristic of the thermoplasticity of materials, the hot-stamping technology process is carried out by using heated movable insert blocks, the forming of local features is completed, sequential forming of different part features is completed, and final product parts are obtained. The dies are installed in one time, and two forming processes are realized, and thus the time-consuming of switching the dies is reduced, and the accuracy requirements of global forming and external dimensions of the product parts are guaranteed. At the same time, the movable insert blocks are convenient to install and easy to replace, so the time of repairing dies is reduced and the production efficiency is improved. The sequential forming technology has the unique advantages of in the forming of aerospace, automotive and other fields of complex structural alloy members, and has wide application prospect.

The invention provides a single-pass integral molding device for an M-shaped metal sealing ring. The single-pass integral molding device is characterized by comprising a bottom plate (13); a pressing plate (1), an upper feeding press block (2), an upper fixing plate (4), an upper sealing press block (5), a liquid chamber module (8), a lower sealing press block (9), a lower fixing plate (10) and a lower feeding press block (12) are sequentially arranged on the bottom plate (13) from top to bottom and are of an annular structure and consistent in axis; and the outer ring wall face of the upper sealing press block (5), the outer ring wall face of the liquid chamber module (8) and the outer ring wall face of the lower sealing press block (9) are flush with one another, and a movable mold (6), a middle mold (17) and an annular reinforced lantern ring (18) are sequentially arranged outwards from the outer ring wall faces, wherein the middle mold (17) is formed by two symmetrical half molds and of an annular structure, and the movable mold (6) is divided into a movable upper mold body (15) and a movable lower mold body (19).

The invention relates to a researching method for hydraulic forming technical parameters of a titanium T-shaped pipe. The combination of a simulation model and a theory test is utilized to research the hydraulic forming of the T-shaped pipe; a 1/4 simulation model is adopted as the model; the researching time is shortened; the production efficiency is increased; a qualified T-shaped pipe is prepared in a hydraulic forming test by utilizing the technical parameters acquired from the research by researching the relation between inner-pressure loading and time (inner-pressure loading path) and the relation between punch feeding and time (punch loading path); the supplementary material of the forming area is effectively realized, so that the smaller wall-thickness thinning ratio and the relative uniform wall-thickness distribution are acquired; the forming limit of the T-shaped pipe is increased; the traditional research for the technical parameters by utilizing experiences and continuous tests is avoided; the cost is reduced.

The invention discloses a useful wrinkle prefabrication method for improving the internal high-pressure forming limit in a pipe, and belongs to the technical field of pipe hydraulic forming. The useful wrinkle prefabrication method can solve the problems that control difficulty and mutual restriction of wrinkles exist in the useful wrinkle high-pressure forming high-expansion-rate pipe fittings made of low-plasticity materials. An induction heating device is used for locally heating a wrinkle-required position of a low-plasticity pipe blank, and after the local temperature of the pipe blank meets the requirement, bending and plastic instability occur in the pipe blank at the heated position under the action of axial material supplementation or under the combined action of internal pressureand axial material supplementation, thus forming the local wrinkles, and the forming continues in such manner until the preforming of all the wrinkles are completed. A useful wrinkle pipe blank is placed into an inner high-pressure forming die, and then pressurized and shaped until the prefabricated wrinkles are completely ironed, attached to dies and formed into final pipe fittings. According tothe useful wrinkle prefabrication method, the dependence on the die structure is avoided, materials are pre-gathered in the inner high-pressure forming areas through the useful wrinkle prefabricating, the limit expansion rate of the pipe fittings is larger after the wrinkles are ironed, and accordingly the distribution of wall thickness is more uniform.

The invention belongs to the field of blow molding production, and in particular relates to a method for automatically adjusting extruded rubber blank and controlling extrusion blow molding based on three-dimensional (3D) scanning. The method comprises the steps of scanning a 3D model or 3D drawing for inputting; automatically selecting an appropriate flow rubber head and determining a flow rubbercurve; automatically mixing raw materials, checking feedback and automatically adjusting the proportion of masterbatch; carrying out electromagnetic induction heating, adjusting the flexible neck-direction and axial wall thicknesses of a mold blank, monitoring the wall thicknesses of the mold blank and feeding back, and automatically adjusting the wall thicknesses of the mold blank; carrying outa blow molding process according to preset process parameters, automatically adjusting blow molding pressure and gas volume, controlling mold temperature, mold opening and closing speed and cycle, andautomatically correcting the size, wall thicknesses and the like of blow molding equipment so as to realize the closed-loop automatic control. The method provided by the invention has the beneficialeffects that operation is adjusted based on a continuous and automatic process without needing any manual intervention, the raw materials in a container are accurately allocated, online wall thicknessmeasurement feedback is monitored in real time, and the wall thicknesses of the mold blank is automatically adjusted, so that the product wall thickness distribution is enabled to be more uniform, and the quality of the hollow container is improved.

The invention relates to a sheet metal part die-free machining method. The sheet metal part die-free machining method comprises the following steps that firstly, four boundaries of a rectangular metalplate material are fixed to a forming machine tool through clamps; secondly, a half-ellipsoid-shaped die is formed as a first intermediate structure, the surface area of the first intermediate structure accounts for 60-80% of the surface area of the finally formed part, and the first intermediate structure is formed in the first pass; thirdly, a reversely raised swell is established upwards fromthe center of the lower side of the first intermediate structure and used as a second intermediate structure, the area of the raised swell accounts for 30-40% of the surface area of the first intermediate structure, and a lower forming tool is adopted to form the second intermediate structure along a preset second formation path in the second pass; and fourthly, the second intermediate structure is machined to be in the shape of the finally formed part in the third pass. The sheet metal part die-free machining method does not need a dedicated mold, the machining period is short, and a large-wall angle or straight-angle piece, complicated-structure pieces and other parts difficult to machine can be formed.

The invention relates to the technical field of hollow blowing molding, in particular to a molding technology for controlling wall thickness distribution of a hollow blow-molded product through inflation pressure. According to the technological condition, the temperature of a bush die ranges from 170 DEG C to 200 DEG C, and the temperature of a material barrel is divided into five segments, wherein the temperature of the first segment is 165 DEG C, the temperature of the second segment is 170 DEG C, the temperature of the third segment is 170 DEG C, the temperature of the fourth segment is 175 DEG C, and the temperature of the fifth segment is 180 DEG C; the temperature of a die ranges from 40 DEG C to 80 DEG C; the inflation pressure ranges from 0.6 MPa to 0.8 MPa; the blowing time is 20 s; the cooling time is 40 s; the part taking time is 10 s; the molding period is 80 s; and the extrusion speed ranges from 100 cm<3>/s to 180 cm<3>/s. The technological process comprises the following steps that firstly, a started blow molding die is moved to the position below the extrusion machine head, a molded blank is extruded in the blow molding die, then die assembling is carried out, and the die is moved out of the position below the extrusion machine head; the mold blank is in contact with the die, a gas channel is formed in the center of the die, and compressed air is introduced in to the molded blank for blowing up the mold blank, so that the mold blank is in contact with the inner surface of the blow molding die, and after cooling shaping, the die is opened for part taking.

There is provided a method for manufacturing a seamless pipe or tube that is capable of making more uniform the wall thickness distribution of a pipe or tube along the longitudinal direction of the pipe or tube than the prior art. The method for manufacturing a seamless pipe or tube according to the present invention comprises a first step of measuring the outside diameter distribution of thg mandrel bar B along the longitudinal direction of the mandrel bar at normal temperature; a second step of measuring the temperature distribution of the mandrel bar along the longitudinal direction of the mandrel bar in the mandrel bar after it being used for a drawing and rolling step in a mandrel mill M; and a third step of measuring the wall thickness distribution of the pipe or tube in the hot state after it being subjected to drawing and rolling with the mandrel bar being inserted thereinto, along the longitudinal direction of the pipe or tube. And the method comprises a fourth step of calculating the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling on the basis of the respective parameters which have been obtained at the first to third steps, and a fifth step of adjusting the setting position of the grooved roll R in the rolling direction on the basis of the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar when the mandrel bar is inserted into the inside of a pipr or tube at the next timing for being used for drawing and rolling.

The invention provides a novel interface structure which allows a lower annular surface of an upper cover and a welding ring to be connected in an inverted manner, so that a bonding path is shortenedand the sealing performance at an interface joint is good, so as to reduce the probability of carbon-hydrogen molecules leaking from the interface joint. The novel interface structure comprises the upper cover and the welding ring, wherein the lower annular surface of the upper cover is provided with an inwardly-concave annular groove; the longitudinal section of the annular groove comprises transition edges on the two sides and a top inverted cavity; the welding ring is provided with an upwardly-convex inverted assembly at the position corresponding to the annular groove; the longitudinal section of the inverted assembly comprises an inverted part at the top part and a transition connector at the lower part; the inverted part enters into the top inverted cavity along the transition edgeson the two sides under the connection state; the two edges of the transition connector cling to the transition edges on the corresponding sides; and the inverted part clings to the inner wall of the top inverted cavity.

The invention discloses a production preparing method of composite foam aluminum. The method specifically comprises the following steps of S1, making a preliminary foaming sphere, and after drying, carrying out standby application; S2, making a final foaming sphere, and after drying, carrying out standby application; S3, forming oxidized grapheme slurry, and carrying out standby application; S4, forming an aluminum alloy melt; S5, stirring to form a pre-treated aluminum alloy melt; S6, carrying out penetrating casting, and forming a foam aluminum plate blank; S7, removing a mold, carrying outultrasonic immersing for a period of time, and after washing, performing drying under the inert gas protection; S8, attaching the other foam aluminum plate blank to a foam aluminum plate blank sprayedwith graphene oxide slurry, and forming a composite type foam aluminum plate blank; and S9, putting the composite foam aluminum plate blank into a heating furnace, carrying out heating, and rolling to become a final composite foam aluminum plate. The composite foam aluminum prepared through the method has the good mechanical property, the structural strength can be improved, density is small, andheat insulation performance is good.

The invention relates to an insert tube multi-holed jet which comprises an insert tube and a spinneret plate. The invention is characterized in that the multi-holed jet is a cuboid assembled by an upper plate, a middle plate and a lower plate; the center of the upper plate is provided with a first casting liquid inlet and the side surface is provided with a core liquid or nitrogen inlet; the two inlets are not communicated; the center of the middle plate is provided with a second casting liquid inlet which is vertically penetrated with a casting liquid distribution tube; the two sides of the casting liquid distribution tube are symmetrically provided with 3 to 6 casting liquid distribution pipelines from the inside to the outside; besides, the diameters thereof are increased gradually from the middle to the two sides; the two sides of the casting liquid distribution tube are symmetrically provided with tube holes for mounting the insert tube; each tube hole is provided with a lower perforating plate and the insert tube of the spinneret plate; the lower plate is provided with a casting liquid slot; a lower casting liquid pipeline is arranged on the casting liquid slot; the diameterof the lower casting liquid pipeline is 1 to 3mm more than the diameter of the insert tube arranged in the lower casting liquid pipeline; the mounting hole of the spinneret plate is arranged on the bottom surface of the lower plate; a fixing hole the diameter of which is 0.5 to 1.5mm more than the diameter of the mounting hole is correspondingly arranged on the spinneret plate.