Method for the production of large-sized products
(57) Abstract:The inventive method for the production of large-sized products includes the deformation of material in the stamp on technological transitions with a fixed rotation of the workpiece after each transition. First carry out the deformation of the workpiece by deforming part of the finished product in height, after which the deformation of the workpiece continue in additional stamp with the completion of the molding of the finished product, when this strain is produced in stamps with the same engraving Creek on the upper or lower plate. 4 Il. The invention relates to the processing of metals by pressure and can be used in the production of large-sized products, for example, of aluminium alloys in stamps, the capacity of which does not allow to produce large-size products.A known method for the production of large-sized products, including laying the workpiece in a stream of stamp deformation her on technological transitions and rotate the workpiece after each transition (1).A known method for the production of large-sized products, including deformation of the workpieces in the stamp on technological perruthenate manufacture due to the need for the large rotation of the workpiece around a vertical axis after each technological transition, in this case, if the shape of the workpiece is not round, for example, extruded, the known methods cannot produce the stamping of these blanks.The technical result generated by the invention, is expressed in eliminating the need for rotation of the workpiece after each technological transition and the process of deformation on the equipment of smaller capacity. According to the invention in the method of production of large-sized products, including deformation of the workpieces in the stamp on technological transitions.First carry out the deformation of the workpiece forming part of the finished product in height, after which the deformation of the workpiece continue in additional stamp with the completion of the molding of the finished product, while the deformation of the workpiece is produced in stamps with the same engraving Creek on the upper or lower plate.Reducing the complexity of manufacturing products is due to the fact that the formation of the products is done without turning blanks vertical axis - this was possibly as a result of forming part of the finished product height first in one stamp, and then continue forming in a different stamp.Amalia any form - this expands the technological capabilities of the method.In Fig. 1 shows a stamp in the open position with the workpiece, the I-th transition of Fig. 2 - stamp in close position; Fig. 3 - stamp in the open position, the second transition; Fig. 4 - stamp - in close position.The stamp (Fig. 1) for implementing the method comprises a top 1 and bottom 2 boards on the working surface of the bottom plate 2 is made engraving stream 3 in square projection on the parting line, in excess of the maximum projected area of the part, which can be performed by means of hot forming processes on existing equipment.Engraving 4 on the top plate 1 does not exceed the maximum area possible for the deformation of the existing equipment and the gnashing of the stamp (Fig. 2) may deform the workpiece 5 until complete clearance height only on the opposite side of the square prints 3 of the bottom plate 2. The rest of the prints 6 plate 1 is cut to a depth H so that when the closure stamp forged 7 in this part are not subjected to deformation, i.e. to the depth H exceeds the height h of the workpiece 3.In Fig. 3 shows a stamp containing the lower plate 2 is the same as in the stamp in Fig. 1 or have odinet engraving stream 9, which is made all the details.The method is as follows.The workpiece 5 is preheated and greased, placed in a stream 3 of the bottom plate 2 of the stamp and deform the upper plate 1 having the engraving 4. After forming the Central part of the billet 40-60% of the area of the projection on the parting line of the stamp to the finished product height (depending on the efforts of the press), stamp unlock, leave forgings 7 on the plate 2, replace the top plate 1 to plate 8 with the etching of the stream 9. After applying lubricant to the surface of the forgings 7 carry out technological transformation - deform the upper plate 8 only those areas that were not in the first technological transition and get the finished product 10.P R I m m e R. For the production of extruded products cipher LS-48 (Fig. 4) alloy AMg6 took ingot h mm, received the workpiece 5 (Fig. 1) in a known manner free forging. The workpiece is loaded into connearney furnace, heated to a temperature of 410aboutWith, were unloaded from the furnace and the truck was applied to a hydraulic press force 10000 so Then capture of the truck was raised to the level of the mirror of the bottom plate 2 of the stamp (Fig. 1) and with help of a bar of the workpiece 5 (Fig. 1) one hundred is 5 produced the deformation of the workpiece (Fig. 2). Received forgings 7 was removed from the stamp and submitted to boot into the oven to heat. Forgings 7 downloaded in connearney furnace was heated to a temperature of 410aboutAnd likewise fed to the press force 10000 ie , and fit in the bottom plate 2 of the stamp (Fig. 3). After applying technological lubricant produced the deformation forgings 7 through the upper plate stamp 8 (Fig. 3). Thus forged 7 is deformed in places where no deformation on the first transition (Fig. 2). In the deformation process forgings 7 received the finished product 10 (Fig. 4).The invention allows to reduce the complexity of manufacturing large-sized products of any form on stamping presses, not allowing it to produce such products due to low power. (56) USSR Author's certificate N 511133, CL 21 J 5/02, 1976.USSR author's certificate N 1094660, CL 21 J 5/02, 1984. Method for the production of LARGE-sized PRODUCTS, including deformation of the workpieces in the stamp on technological transitions, characterized in that the first exercise deformation of the workpiece with a forming part of the finished product in height, after which the deformation of the workpiece continue in additional stamp with the completion Uru Creek on the upper or lower plate.
FIELD: plastic working of metals, possibly operations for finish working of forgings of double-end box nut wrenches.
SUBSTANCE: die set includes upper and lower plates with guiding columns, punch for punching operation mounted on upper plate, stripper, lower die for punching, half-open trimming lower die and trimming punch. Trimming lower die is mounted on upper plate; it has cutting edge and cavity arranged behind collar of cutting edge and designed for freely placing forging of nut wrench. Trimming punch is mounted on lower plate and it has embracing supporting surface for fixing forging at trimming and straightening operations.
EFFECT: enhanced quality of forging.
9 dwg, 1 ex
FIELD: metal working, possibly manufacture of flanged articles and articles without flanges of different alloys.
SUBSTANCE: method comprises steps of heating blank and deforming it in die set; sustaining relation of blank temperature to that of die set in range 0.7 - 7.4. Blank is heated in predetermined temperature range depending upon blank material. Said temperature range may be found from ductility diagram and(or) yield curves and(or) from blank material recrystallization diagrams.
EFFECT: enhanced factor of using metal, improved quality of articles, lowered labor consumption of forging and subsequent working of blank.
6 cl, 2 dwg, 2 ex
FIELD: plastic working of metals, possibly forming forged pieces, for example rings, gear wheels, flanges.
SUBSTANCE: initial blank is heated, preliminarily shaped, finally formed and trimmed. At final forming open die set is used; said die set has gap between its upper and lower halves. Said gap is arranged in zone of forging that is formed last. Dimensions of die set are no more than respective dimensions of forging in order to prevent deforming of displaced excess of metal.
EFFECT: lowered deforming efforts, decreased metal consumption.
11 cl, 2 dwg, 1 ex
FIELD: plastic working of metals, possibly manufacture of forged pieces with central opening.
SUBSTANCE: method comprises steps of upsetting heated initial blank; forming semi-finished product having bridge in zone of one end of its inner portion in die set without forming burr; remaining part of end surface having no contact with tool; then performing final forming, mainly in one half of open die set at displacing outer burr and with possibility of displacing inner burr; removing bridge and trimming burrs.
EFFECT: lowered metal and energy consumption at process.
20 cl, 6 dwg, 1 ex
FIELD: plastic metal working, namely processes of die forging, possibly for manufacturing stepped hollow shafts.
SUBSTANCE: method comprises steps of calibrating blank prepared by chopping; forming in blank upper and lower cavities, bottom portion with cylindrical near-bottom part and local outer bulged zone. Upper cavity is formed at first pressing out stage. At second stage of pressing out lower cavity, bottom portion and local outer bulged zone are formed simultaneously while blank is centered by punch along it upper cavity and in die along cylindrical near-bottom part.
EFFECT: enlarged manufacturing possibilities of method.
FIELD: plastic working of metals, possibly manufacture of hollow parts such as sleeve type parts with central protrusion on inner surface of bottom, namely artillery shell cases.
SUBSTANCE: method comprises steps of backward pressing out of initial blank and shaping bottom portion having protrusion on inner surface during several transitions. After backward pressing out transition, blank is drawn at several transitions. Bottom portion with central protrusion is formed during two transitions, namely: at transition for preliminarily shaping central protrusion and at transition for finally forming bottom portion. Preliminary forming is realized during transition of backward pressing out of initial blank by means of inner punch with recess. Final forming is realized by means of inner punch with recess and outer punch with protrusion.
EFFECT: improved quality of articles.
FIELD: plastic working of metals, namely forging production, manufacture of forged pieces of ring-like cone gear wheels with diameter 638 mm and with wide massive rim.
SUBSTANCE: method comprises steps of preliminarily upsetting initial blank with diameter 250 mm and length 335 mm; then subjecting upset blank to non-complete open broaching and its further die forging. All operations are realized in the same die set. Preliminary upsetting is performed on flat striker with diameter 350 mm till achieving diameter of upset blank equal to said value. Striker is arranged in central portion of die set impression before broaching and after broaching it is removed. Non-complete open broaching of upset blank is realized by means of detachable cone broach with mounting land having diameter 270 mm.
EFFECT: improved quality of produced forged pieces.
8 dwg, 1 ex
FIELD: plastic working of metals, possibly manufacture of axles of rolling stock by forming and forging.
SUBSTANCE: method comprises steps of deforming initial square cross section blank by forging till intermediate designed size by knocking off faces in order to form semi-finished cylindrical product of forged piece; then feeding semi-finished product of forged piece to hammer die set. Die set is detachable one, it includes two parts with cavities restricting open finish impression without flash grooves. Profile of finish impression of die set corresponds to final size of forged piece. Two compensation openings are arranged in ends of impression. In die set hot die forging of semi-finished product driven to rotation by means of manipulator is realized. Then excess metal on ends is trimmed, forged piece is straightened and cooled.
EFFECT: enhanced quality of forged piece due to providing optimal deforming schedule, lowered power and metal consumption.
4 cl, 5 dwg
FIELD: plastic working of metals, possibly manufacture of internal combustion connecting rod by closed forming.
SUBSTANCE: method comprises steps of preparing blank with two thickened end portions and one thickened portion in mean zone; deforming prepared blank in cavity of die set while making openings in thickened end portions at displacing blank metal; shaping mean portion of connecting rod and after-forming its heads. Volume of thickened portion in mean zone of blank exceeds volume of mean portion of article by value equal to half of total metal volume of blank displaced at making said openings. Gravity center of thickened portion of mean zone is spaced from axes of openings by distance inversely proportional to metal volumes displaced at forming respective openings.
EFFECT: improved quality of article.
2 dwg, 1 ex
FIELD: plastic working of metals, possibly forging blanks of nickel base super-alloy.
SUBSTANCE: method is realized with use of forging press with forging die sets of nickel base super-alloy having yield limit no less than stress of plastic yielding of super-alloy at forging for making forged pieces at temperature range approximately from 926.67°C till approximately 1010.00°C at nominal deformation rate. Blank for forging and die sets are heated till said forging temperature. Forging is realized at such temperature and at nominal deformation rate. Nickel base super-alloy selected from group of alloys may be used as material of forged blank. According to one variant of invention blank of compacted powder of nickel base super-alloy is used for forging. In such case die sets are made of nickel-base super-alloy containing, mass%: aluminum, approximately 5 - 7%; molybdenum, approximately 8 - 15%; tungsten, approximately 5 - 15%; magnesium, near 140 ppm; nickel and impurities, the balance.
EFFECT: lowered costs for producing forged pieces of super-alloy with desired properties.
15 cl, 3 dwg, 2 tbl