134results about How to "Improve forging quality" patented technology

The invention relates to bar material forging machining method of titanium alloy, particularly to a forging machining method of large-sized bar materials of TC4 (Ti-6Al-4V) titanium alloy. The forging machining method is characterized by comprising the following steps of step 1, performing cogging forging, step 2, performing intermediate forging above a phase transformation point, step 3, performing intermediate forging below the phase transformation point, step 4 and step 5, performing finished product forging and obtaining the phi 200 to 300 mm and 2000 to 3000 mm length of large-sized bar materials of the TC4 titanium alloy finally. Compared with the prior art, a large-sized ingot casting and a large-tonnage forging device are not required and the industrialized production can be achieved through an ordinary industrial 3 ton ingot and a small-tonnage forging press and the equipment investment is small, only a 3 tons of electric arc furnace and a 3000 tons of forming oil press which is matched with the electric arc furnace need to be invested in the phi 600 of 3 ton ingot, the small-tonnage forging press such as a 1600 tons of forging press needs to be invested in the forging process, and accordingly the equipment investment is significantly reduced.

The invention discloses a manufacturing process of a forging stock of a steel forging piece for oil extracting equipment in a deep sea, which comprises the following steps of: with martensite precipitation hardening type stainless steel as a steel forging piece material, selecting a square ingot, heating to 1180DEG C, cogging along the length direction of the steel ingot to obtain an octagonal section steel billet, wherein the forging ratio is 2.0-2.2; heating the octagonal section steel billet to 1040DEG C and preserving heat for 360 minutes; carrying out oil cooling below 32DEG C; taking an intermediate section as a billet; axially upsetting the billet from the initial forging temperature of 1150DEG C to the final forging temperature of 990DEG C; when the billet is upset to half of the height of the original billet, drawing out the octagonal section of the upset billet according to the original axial direction; axially upsetting when the billet is drawn to the length of the original billet; when the billet is upset to half of the height of the original billet, drawing out the octagonal section of the upset billet according to the original axial direction; when axially forging and shaping the billet when the billet is upset to half of the height of the original billet, enabling the total forging ratio to be 5.5 and obtaining a rectangular forging piece; and air cooling to be 340-360DEG C, carrying out furnace insulating for 120 minutes and then carrying out furnace cooling to the room temperature.

The invention discloses a manufacturing method for a large internal T-shaped ring forge piece blank of SB564UNS N06690 alloy. Firstly, upsetting and drawing are performed through a hydraulic forging press, a punch with the diameter of 300mm is used for punching, then chambering and rounding are performed, twice rolling is performed on a ring rolling mill by the aid of a step mold, an original blank with a rectangular section is circularly rolled into a middle blank with a step, then the middle blank is rotated by 180 degrees, and second rolling is performed, so that the internal T-shaped annular forge piece blank is obtained. According to the manufacturing method for the large internal T-shaped annular forge piece blank of the SB564UNS N06690 alloy, the structure of the manufactured forge piece blank is uniform, grains are refined, shapes are rectangular, and the forge piece quality and the production efficiency are high.

An apparatus is described for forging a workpiece (3) with an intermittently drivable clamping head (4) for the workpiece (3) and with a counter-holder (5) for receiving the end of the workpiece (3) averted from the clamping head (4), which counter-holder is rotatably held in a frame (12). In order to provide advantageous constructional conditions it is proposed that the counter-holder (5) is connected with an intermittent rotational drive (13) which can be triggered synchronously to the clamping head (4).

A mechanical lower forging extrusion and material ejection device of a forging mechanical press comprises a crank shaft arranged on a machine body; one end of the crank shaft penetrates through the machine body and is provided with an eccentric sleeve; a connection rod is installed on the eccentric sleeve, an upper pull rod is hinged to the lower end of the connection rod, and the lower end of the upper pull rod is connected with a lower pull rod through a belleville spring; the lower end of the lower pull rod is hinged to one end of a lever; the upper pull rod and the lower pull rod are installed on a bracket, and the bracket is connected with the machine body; a long hole is formed in the middle of the lever and internally provided with a third pin shaft, and the third pin shaft is arranged on a support fixedly connected with the bottom of the machine body; and the other end of the lever is provided with a rolling wheel making contact with the bottom of a material ejection seat, an ejection plate is arranged at the upper end of the material ejection seat, the two sides of the ejection plate are provided with air cylinders correspondingly, and a plurality of upper ejection rods are arranged at the upper end of the ejection plate and are installed in a workbench. The mechanical lower forging extrusion and material ejection device has the advantages of having a synchronous forging extrusion function or a drawing function or a asynchronous ejection function, and being diversified in purpose, adjustable in lower forging extrusion force or ejection force, capable of preventing overload, long in service life, high in product quality and the like.

The invention discloses a full-automatic multi-station forging hydraulic press. The full-automatic multi-station forging hydraulic press mainly comprises a main machine, a swinging rotary formwork, piece moving manipulators and a moving worktable. The swinging rotary formwork mainly comprises a bracket, an upper support, a lower support, a main shaft, a swing arm and a punching seat. Each piece moving manipulator mainly includes a sliding seat, a vertical hydraulic cylinder, a horizontal hydraulic cylinder, a guide rod and a clamping seat. The full-automatic multi-station forging hydraulic press has an automatic conversion function of forging stations, and can complete a plurality of forging processes such as upsetting, perforating, trimming and turning and squeezing in a production line mode.

The invention provides a mould preheating device. The mould preheating device comprises a hollow base, a mould supporting shaft for fixing a mould is arranged at the center of the base, the mould supporting shaft sequentially comprises a supporting column, a transition shaft and a rotary shaft from top to bottom, the bottom end and the mid-upper side wall of the rotary shaft are rotatably fixed onthe base , the rotary shaft inside the base is connected with a rotating device, a ring-shaped heating housing is arranged above the mould, the heating housing is internally provided with heating wires, the top surface of the heating housing is fixed on a lifting plate, an electromagnetic heating rod is coaxially arranged at the center of the heating housing, the top end of the electromagnetic heating rod is fixed to an upper heating seat, the upper heating seat is fixed on the lifting plate, a cavity accommodating a lower heating seat is arranged at the center of the mould supporting shaft,the lower heating seat is arranged at the top of the cavity, the lower heating seat is fixed to the bottom surface of the base, the two heating seats serve as electrodes of the electromagnetic heatingrod, and the lifting plate is connected with a lifting device. The mould preheating device is capable of heating the inside wall and the outside wall of the mould at the same time, and the mould heating uniformity is improved.

The invention relates to composite fiber fabric for large-pressing-machine forging and a production method and application of the composite fiber fabric and belongs to pressing machine large forge piece forming forging. The composite fiber fabric is composited by basalt fiber fabric and graphite powder, wherein the graphite powder evenly attaches to two surfaces of the basalt fiber fabric. The composite fiber fabric is small in friction coefficient, good in thermal insulation and lubricating effects, high in pressure resistance, good in softness, high in elongation at high temperature and thelike.

The invention discloses a vertical forging process of a double-shaft-coupling tooth blank with deep blind holes. The process comprises the steps that precise blanking is carried out, specifically, precise blanking is carried out according to the weight of the blank after forging molding, and the blanking error does not exceed 1%; heating is carried out to reach a forging temperature; material aggregating is carried out, specifically, the cavity volume of a material aggregating mold is 1%-2% larger than the total volume of the blank; pre-forging is carried out, specifically, the cavity volume of a pre-forging mold being 1%-2% larger than the total volume of the blank; and finish forging is carried out, specifically, the cavity volume of a finish forging mold is 1%-2% larger than the total volume of the blank. By precisely blanking and strictly controlling relationships of the cavity volumes of the forming molds of material aggregating, pre-forging and finish forging and the volume of the blank, the double-shaft-coupling tooth blank with the deep blind holes can be directly forged by combining the special molds of material aggregating, pre-forging and finish forging, fins are avoided, working procedures are reduced, and the material cost and the machining cost are reduced.

The invention provides a die-sleeve type ring rolling forming process for an externally square and internally circular forged piece. The die-sleeve type ring rolling forming process includes preheating an externally circular and internally square die and a die sleeve to the temperature ranging from 300 DEG C to 400 DEG C, sleeving the preheated die sleeve on a core roll of a ring rolling mill; placing a blank which is heated to the temperature ranging from 1150 DEG C to 1180 DEG C on the die sleeve, and sleeving the externally circular and internally square die on the blank; starting the ring rolling mill, positioning the externally circular and internally square die, the die sleeve and the blank, driving the externally circular and internally square die and the die sleeve to rotate at a set speed ranging from 2mm/s to 10mm/s by the ring rolling mill, and setting exerted force to range from 500KN to 4200KN so that the ring rolling mill stops working when the wall thickness of the externally square and internally circular forged piece is thinned to a set dimension; and turning off the ring rolling mill, taking out the externally square and internally circular forged piece, cooling the externally square and internally circular forged piece by heat treatment at the temperature ranging from 880 DEG C to 920 DEG C, and machining the externally square and internally circular forged piece to obtain an externally square and internally circular part. The die-sleeve type ring rolling forming process has the advantages that machining and cutting amounts are low, materials are saved, a metal flow line is not cut off, the externally square and internally circular part is uniform in texture and high in comprehensive performance, grains are fine, work efficiency is high, and the forged piece is high in quality and long in service life.

The invention discloses a manual and automatic integrated clamping and turning-over forging machine which comprises a beating box. A fixing table is fixedly connected to the right end of the beating box. An operation table is further fixed to the right end of the fixing table. A beating mechanism capable of forging materials placed at the upper end of the fixing table is arranged in the beating box. A moving cavity with the left end wall and the right end wall penetrating through a transmission cavity is formed in the transmission cavity. A clamping mechanism capable of clamping the materialsor driving the materials to rotate is arranged in the moving cavity. The clamping mechanism comprises a moving block. A rotating cavity is formed in the moving block, wherein the rotating cavity is opened upwards, and the left end wall of the rotating cavity communicates with the moving cavity. A ring-shaped cavity opened leftwards is formed in the right end wall of the rotating cavity. The forging machine is simple in structure and convenient to operate, switching can be achieved between automatic forging and manual auxiliary forging, the application range of the device is widened, when automatic forging is carried out, consumption of labor is saved, forging efficiency is improved, when automatic forging is carried out, manual auxiliary forging is carried out, and forging quality can be improved.

The invention provides a heating device for forging hollow forge pieces and a forging device, and particularly relates to the technical field of free forging. The heating device for forging the hollowforge pieces comprises a supporting mechanism and a plurality of heating mechanisms, wherein a first through hole is formed in the supporting mechanism; the plurality of heating mechanisms are connected with the supporting mechanism, the plurality of heating mechanisms are arranged around the first through hole, the heating ends of the plurality of heating mechanisms are arranged towards one sideof the supporting mechanism, and the first through hole penetrates through one side of the supporting mechanism; and the end part of the steel forge piece sleeving a mandrel is heated by the heatingdevice for forging the hollow forge piece. Compared with the prior art, the technical scheme has the advantage that the function of preserving heat of the end face of the steel forge piece at the endof the mandrel is realized.