109results about How to "Reduce forming load" patented technology

The invention discloses a multi-point male die liquid-filling drawing forming device and a multi-point male die liquid-filling drawing forming method for a plate, relates to a device and a method for forming thin-walled curved plate parts, and aims to solve the problem of difficulty in forming of thin-walled and deep-cavity parts with complicated curved surfaces. A plurality of small punches are independently arranged; the upper ends of the small punches penetrate into through holes in a male die body; the upper end of each small punch is connected with a linear driving device; a female die is a semi-closed cavity of which the upper end is opened and the lower end is closed; an elastic base plate and a metal protection plate are superposed on the upper end surface of the female die from bottom to top. The heights of the small punches are adjusted to realize the construction of an outer contour of a multi-point male die; a to-be-formed plate blank, the elastic base plate and the metal protection plate are sequentially arranged on the upper end surface of the female die; a blank holder moves down to be assembled with the female die, and the multi-point male die moves down and applies a drawing force to the to-be-formed plate blank; meanwhile, a liquid medium is filled into an inner cavity of the female by the aid of a pressurizing system until drawing is completed to obtain parts of a required shape. The device and the method are used for forming the plate, and the thin-walled and deep-cavity parts with the complicated curved surfaces can be formed.

The invention discloses a device and a method for compounding and forming a central flange pipe joint from a pipe blank in a single-step and multi-directional way. The method comprises the following steps of: applying enough pressure on an appropriate pipe billet serving as a blank to make the whole pipe billet plastically deformed; forming a central flange of the pipe joint by upsetting; and inversely extruding to form a small head end part of the pipe joint and positively extruding to form a large head end part of the pipe joint, so metal upwards, downwards and radially flows, the forming force is small, and the number of stations is small. Compared with a cutting pipe joint, the invention has the advantages of high material utilization ratio and production efficiency and good metal flow structure, and is particularly applicable for production of high-pressure pipe joints.

The invention discloses a high-precision aluminum alloy rectangular tube forming method which comprises the following steps: a) heating the prepared No.6061 aluminum alloy ingot over uniform fire to 415+/-5 DEG C, and keeping for 1-2 hours; b) performing hot extrusion on an extrusion shunting mould with a preheating temperature of 400 DEG C to obtain an initial tube blank; c) performing annealingtreatment in salt bath; d) performing cold rolling on the tube blank obtained in the step c) to obtain a round tube; e) soaking the round tube obtained in the step d) in a 38# cylinder oil for 24 hours; f) performing non-mandrel drawing on the tube blank obtained in the step e) to obtain an approximately rectangular tube; g) performing mandrel drawing on the approximately rectangular tube obtained in the step f) through a rectangular correction mould to obtain a rectangular tube; and h) performing mandrel drawing of the rectangular tube obtained in the step g) to obtain the finished tube. Through the invention, the size precision and surface quality of the finished tube are improved, the problems that the tube blank is drawn apart in the drawing process and obvious transverse cracks appear at the corner are solved, and the operational performance and service life of the product are remarkably improved.

The invention provides a device for compositely extruding a spline shaft by means of medium-high frequency induction heating and vibrating and a technology for compositely extruding the spline shaft by means of medium-high frequency induction heating and vibrating. The device comprises a vibrator and a medium-high frequency induction heater, wherein the vibrator is axially connected with a blank in series by a clamp, and the medium-high frequency induction heater and an extrusion die are distributed at the front of a blank feed direction. The technology comprises the following steps of: firstly, clamping a blank, wherein the clamp drives the blank to move to a spline tooth-shaped section of the blank along the feed direction to completely enter into an inner chamber of the medium-high frequency induction heater, quickly heating the surface metal of the spline tooth-shaped section on the blank to a preset temperature, continuously feeding the blank, applying axial vibration to the blank by the vibrator, forming the spline shaft in an extruding way due to the action of the extrusion die, reversely withdrawing the blank, and quickly quenching. The device has the advantages of being less in forming load, low in energy consumption, high in efficiency, good in forming quality, wide in machining range and the like.

The invention relates to a surface micro-morphology processing method of a gear composite plastic forming die. The surface micro-morphology processing method comprises the following step that S1, a large area of the forming pressure of the mold in the machining process is determined, and a micro-pit is machined in the area where the forming pressure is larger; S2, the micro-pit with nanometer molybdenum disulfide is filled. The micro-pit morphology is based on the forming mechanism of the mold, the surface micro-textures processed by the maximum forming pressure area are selected, a lubricantcan be effectively provided under the condition of boundary lubrication and lean oil, the mechanical performance and the friction lubricating performance of the precision forging gear in the forming process are improved, the abrasion amount of the precision forging die is reduced, so that the service life of the die is prolonged; the micro-morphology processing method is efficient, precise and controllable, pollution-free to the environment, low in cost and the like.

The invention discloses an extrusion forming die for an open mold cavity. The extrusion forming die mainly comprises an extrusion punching die body and an extrusion pulling die body. In the extrusion punching stage, the open mold cavity is formed by a first female die and a second female die. The second female punching die is of a floating structure and moves downwards along an upper die, the forming load is reduced, and the bend resistance bearing capability of a male die is improved. After a blank makes contact with a first jacking rod, the upper die and an upper ramming cylinder are depressurized; piston rods of a left piston cylinder and a right piston cylinder move upwards to support a female die supporting ring; a left movable supporting block and a right movable supporting block are pulled out horizontally under the effect of a moving and resetting system; a lower die sleeve and the female die supporting ring overall move downwards under the effects of the resilience force of a spring and the pressing force of the upper ramming cylinder in the return stroke process of the left piston cylinder and the right piston cylinder; and when the blank makes complete contact with a lower fixed plate, the open mold cavity is formed again at the moment. The thinning pulling times can be effectively decreased, forming defects such as pull cracks and pull fractures are prevented, and the extrusion forming die for the open mold cavity can be applied to forming of various deep blind hole thin wall products.

The invention aims at solving problems in the prior art, and provides a forming method of die forging clamps made of titanium alloy. The method belongs to the field of forging of titanium alloy materials. The method comprises the following steps of: cleaning up surface flaws of a rhombic blank made of the titanium alloy, heating the cleaned rhombic blank in a heating furnace till the temperature reaches 930-950 DEG C, and keeping the temperature for 0.5-2h; performing punching by an open die forging machine so as to obtain a rhombic blank with a through hole in the center; placing the rhombic blank with the through hole in the center in a forging die, and forging the rhombic blank into a die forging clamp by a die forging machine; and performing a trimming working procedure and a punching working procedure so as to obtain a finished product. According to the method disclosed by the invention, the forming load needed by die forging is greatly reduced, and the service life of a die is prolonged; besides, the consumption of precious raw materials is reduced, and the quality of titanium alloy forgings is guaranteed.

The invention discloses a hub extrusion forming method. A hub is produced and manufactured in a pre-forging and final forging two-step extrusion forming mode. In the pre-forging stage, a rim and an inner rim portion of the hub are extruded and formed through downward reverse extrusion motion of a pre-forging upper male die, and an outer rim and wheel arm parts of the hub are extruded and formed through the downward extruding motion of a final forging upper die in the final forging forming stage. The hub producing and manufacturing process by adopting the forming method is simple, the production efficiency is high, the forming pressure is smaller, the near-net forming material utilization rate is high, and the hub mechanical performance is more excellent.

The invention relates to a semi-solid forming method of a composite pipe, and belongs to the technical field of semi-solid forming of metal. The semi-solid forming method comprises the following steps: at first, pouring a three-layered material by a centrifugal casting machine to obtain a composite pipe blank (at first, pouring an outer-layer easy-to-plastic deformation material, then pouring the middle-layer difficult-to-plastic deformation material, and at last, pouring an inner-layer easy-to-plastic deformation material); then, heating the composite pipe blank to the solid-liquid temperature interval of the difficult-to-plastic deformation material to enable the composite pipe blank to be in the semi-solid state, and reducing the diameter and the wall thickness of the composite pipe blank through high-speed extrusion, so as to obtain a pipe with a certain length; and at last, heating the hot extrusion pipe, so as to obtain a composite pipe with different mechanical properties. The semi-solid forming method solves the problem that a difficult-to-deformation pipe is difficult to process and manufacture, long in forming cycle, and high in product cost, and expands the application field of a semi-solid forming technology.

The invention discloses an extrusion forming method for no-anisotropy magnesium alloy rods. The method relates to an extrusion forming mold for the no-anisotropy magnesium alloy rods; the mold comprises an insert, a convex mold connected with a press, a concave mold connected with a rotating mechanism, and an ejecting mechanism; a molding cavity is formed in the concave mold, and is provided witha feed port; an extrusion working belt is arranged in the molding cavity; and the insert is mounted on the extrusion working belt. The torque is applied based on traditional extrusion; the rotating lap number can be increased through change of the rotating speed, so that the gradient structure is improved under rotating formation, and the uniform deformation of the structure is realized; the higher shearing strain is generated through change of internal stress and strain states of a deformation body to form a fine crystal structure with large-angle grain boundary, so that the anisotropy of components is reduced; and insert can be timely replaced after wear to prevent the cost increment of the scrapped concave mold, so that the mold life is prolonged, and the popularization and economical benefit in the forging industry is prominent.

Disclosed is a method for determining blanks of different thickness for local loading forming of a three-dimensional frame-shaped member. The method includes steps of determining a calculating formula for sizes of inflow ribbed cavity materials according to various loading states in a forming process to realize fast analysis of a simplified interface and shortening time for determining blank shapes, and modifying blank shapes according to numerical simulation results, and determining the blanks of different thickness which meet the filling demands so as to reduce cost. By the method, the determined size distribution of the blanks of different thickness is reasonable, the flaws such as insufficient filling, folding and the like in the forming process are eliminated, machining allowance and forming load are reduced, and the blanking is easy due to the simple blank shapes.

The invention discloses a method for determining a blank with different thicknesses for two-dimensional integrated loading and forming. The method comprises the following steps of: quickly forecasting material flowability and cavity filling of a multi-rib structural member during two-dimensional forming based on partial loading characteristics according to a resolving analysis calculation formula; quickly determining the shape of the blank with different thicknesses of a two-dimensional base body by quickly analyzing the material flowability and the cavity filling on a cross section; performing value simulation; modifying the shape of the blank with different thicknesses according to a value simulation result by considering the partial loading flow characteristics; and obtaining the final shape of the blank with different thicknesses by adjusting and modifying for zero or a plurality of times. According to the determined blank with different thicknesses, the problem that the cavity cannot be filled fully during forming can be solved completely, and the optimized design time is shortened. The determined of the blank with different thicknesses is distributed rationally; shortcomings that the cavity cannot be filled fully, the blank is folded and the like during forming are overcome; the machining allowance and the forming load are reduced; the shape of the blank is simple; and the blank is easy to make.

The invention provides a die for achieving continuous local loading forming of a large-size rib plate and a forming method of the die, and belongs to the field of plastic processing. The continuous local loading die comprises an upper male die connected with an upper working platform of a press, and a lower die assembly connected with a lower working platform of an extruder. The upper male die isconnected with an upper working table of the press through a fastening bolt. The lower die assembly comprises a lower die body, a lower die base with a lead screw and sliding groove structure, and a heating rod used for heating the die. The heating rod is arranged in a heating rod groove in the lower die body, and the lower die body is matched with the lower die base through a dovetail groove andconnected with the lower die base through a lead screw structure on the lower die base. Die cavity design is carried out according to the structure of a formed part, the continuous local loading combined die is used, a lower die cavity is moved in the loading process, the assembling relation of an upper die body and the lower die body is changed, and forming of the large-size rib plate is achievedthrough continuous local loading of different loading areas. The forming load can be effectively reduced, and the problem that complex large-size rib plate forming is limited by the area of the working platform of the extruder and the load of the press is solved.

The invention discloses a precise hot forming method for a metal forge piece with a nearly-semi-oval thin web and a large rib spacing, belongs to the field of isothermal forging, and aims to solve the problems that an existing special-shaped contour web large-rib-spacing metal component cannot be partially filled, ribs are folded, the production cost is high, and the service life of a mold is short. The method comprises the steps: 1, preparing a preformed blank; 2, preforming; 3, drawing and repairing damage; 4, final forming; and 5, heat treatment after forging. The method is used for precise hot forming of the metal forge piece with the nearly-semi-oval thin web and the large rib spacing.

The invention discloses a nonanisotropic magnesium alloy bar extrusion forming mold. The nonanisotropic magnesium alloy bar extrusion forming mold comprises an insert, amale mold and a female mold. The male mold is connected with a press for axial movement, the female mold is connected with a rotating mechanism for circumferential rotating movement, a cavity is formed in the female mold, a feed port is formed in the cavity, an extrusion working tape is further arranged in the cavity, the insert, a bar and the male mold are arranged in the feed port, and the insert is mounted at the position ofthe extrusion working tape. Torque is applied on the basis of traditional extrusion, a gradient structure generated under rotating forming can be improved by changing the rotating speed and increasing the rotating circle number, uniform deformation of the structure is achieved, the large shearing strain capacity is generated by changing the stress-strain state in a deformation body, grains can berefined, a fine grain structure with a large angle grain boundary is formed, the anisotropy of the components is reduced, the insert can be replaced in time after being abraded due to the structuralmanner of the insert, the situation that the cost is increased as the female mold is scrapped is avoided, thus, the service life of the mold is prolonged, and economic benefits are remarkable when thenonanisotropic magnesium alloy bar extrusion forming mold is popularized to the forging and pressing industry.

The invention relates to an integral combined tooth gear forging process with punching performed before combined tooth forming. The integral combined tooth gear forging process is characterized in that a blank is shaped, then blank making and pre-forging are sequentially performed, a middle connected sheet of a pre-forged piece is removed through punching, and finally final forging forming is performed. According to the integral combined tooth gear forging process, the combined tooth portion is formed by using an upsetting and extruding combined method so that a gear forge piece with qualifiedsize precision and performance can be obtained under the conditions of relatively low forming load and relatively long mold service life.

The invention discloses a method for determining an uneven-thickness blank for realizing local loading forming of a rib-plate-shaped three-dimensional component. A computational formula for the volume of materials flowing into a rib cavity is determined according to various loading states in a forming process, a simplified interface is fast analyzed, and the time for determining the shape of the blank is shortened; the shape of the blank is corrected according to a numerical value simulated result, the uneven-thickness blank meeting the requirement of filling is determined, and cost is reduced; and the volume distribution of the determined uneven-thickness blank is reasonable, shortcomings that the blank cannot fully filled, is folded and the like in the forming process are eliminated, allowance for machining is reduced, forming loads are reduced, the shape of the blank is simple, and the blank is easy to be manufactured.

The invention discloses a medium-thick plate differential thermal volume forming device and process. Positions with forming characteristics on plates are subjected to local sensing heating, and the heating temperature does not exceed the recrystallization temperature; the locally heated plates are graded to a next process to be subjected to local volume forming. By means of the device and the process, the plate volume forming load can be reduced effectively, and the die service life is prolonged.