Forged pieces forming method

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

 

The invention relates to the processing of metals by pressure and can be used in the manufacture of closed die forgings, such as rings, gears, flanges, etc. Getting forging is carried out in a temperature corresponding to the warm and hot bulk forming.

A known method of manufacturing forgings, including cutting and heating source procurement, advanced profiling in the form of precipitation, the final forging open die, in which the excess metal displace in oblasnoy groove with oblained bridge and shop, which come in a Central height of the area of the lateral surface of the forgings (Theory forging and stamping: Textbook. a manual for students of engineering and metallurgical specialties //Epoxol, Ugandan, V.L. Kolmogorov and others; Under the General Ed. Epoxv, Agulchenko. - 2nd ed., revised and enlarged extra - M.: Mashinostroenie, 1992. - 720 S.: ill., str-483, 485-489).

The implementation of the method associated with the displacement of a large number of metal Burr. This is due to the method of forming, on which the formation of trudnozapominaemyj parts forgings is due to the backwater (locking action of the metal), from ablounge bridge. The stamps have low resistance because of the high effort stamping. Have oblasnoi grooves of the bridge on which the implement is : deformation contact plastically deformable material with the tool, increases the total clamping 1.63-2.77 regarding efforts deformation forgings (Theory of metal forming. Variational methods for calculating forces and deformations //Ilachinski, See, Oageng and others; Ed. by Yiatros. - M.: Metallurgizdat, 1963. - 672 with silt. page 404).

A known method of manufacturing forgings, including cutting and heating source procurement, advanced profiling by precipitation and formation of the semi-finished product, the final forging open die preemptive excess metal in oblasnoy groove with bridge and store, the design configuration forgings due to backwater from scrap, waste management (Sementi VI, Acaro I.L., Volosov NN. Advanced technology, equipment and automation of forging and stamping production of KAMAZ. - M.: Mashinostroenie, 1989. - 304 S. Il. pages 40-41, Fig. 24).

The disadvantage of this technical solution are high forging force due to deformation of the contact metal tool in the field ablounge bridge. The design configuration forgings due to backwater from scrap requires another stage of the design process to provide for the consumption of metal for the formation of the Burr, which reduces the utilization of metal.

The task is to develop a way to pozvolyayuschty forgings with less effort and less metal.

The technical result in the method of manufacturing forgings, including the production of the original piece, heat, advanced profiling, the final forging open die having verhniuju and lower halves, with the exclusion of the excess metal in the gap between the upper and lower halves of the die and trimming Burr, is achieved by the fact that during the final stamping uses a public stamp, in which the gap between the upper and lower halves is in the field of forging formed in the last turn, and the sizes of the contacting metal surfaces of engravings of these halves does not exceed the corresponding dimensions of the forging to prevent deformation of the extruded excess metal.

Preliminary profiling is carried out by precipitation.

Preliminary profiling is carried out by rolling and forming semi-finished product.

Preliminary profiling is carried out by precipitation and formation of the semi-finished product.

The formation of semi spend several transitions.

The formation of the semi-finished product can be done without crowding out of the overflow.

The formation of the semi-finished product is carried out with the exclusion of the overflow.

Forming at least a region of the forging in the transition zone of the bottom surface in the side.

Form last area generation is key in the transition zone of the upper end surface in the side.

Forming at least a region of the forging in the area of the lateral surface.

The excess metal displace in the overflow and the jumper.

Wipe excess metal during the final forming in the gap between the upper and lower halves of the stamp, which does not contain ablounge bridge, can significantly reduce the contact stresses and the total clamping. This is due to the fact that the extruded metal has no deformation of contact with the tool, not plastically deformed and does not create backwater from the outside. Implemented stamping without backwater from the overflow. Bespodobna stamping.

Reduction of contact stresses on the surface of the engraving reduces the heat transfer between the workpiece and the stamp, which also has a positive effect on tool life.

The location of the gap between the upper and lower halves of the stamp in the field forgings, formed last allows you to save metal. In this case, the value of the displaced metal in the scrap is only caused by the inaccuracy of the original piece and the fluctuation amount of permanently stamped forgings, which depends on die wear and configuration process.

Performing in contact with the metal surfaces of the prints half of the stamp with dimensions not exceeding the respective sizes of forgings (after trim and scrap from permanently stamped forgings), allows for various configuration and sizes of forgings to implement the displacement of the metal in the scrap without deformation, blainy bridge with its features is missing.

In cases of simple configuration forgings preliminary profiling is carried out only by precipitation of the original piece. While there are various options: the sediment on the inserts with a flat contact surface, the sediment on the inserts with shaped contact surface and, alternatively, the sludge into a ball. To improve the symmetry of the upset billet spend draught in the ring. This increases the symmetry of the semi-finished product and, consequently, saves metal.

If the configuration forging allows the use of high-performance methods of rolling, advanced profiling is carried out by rolling and forming semi-finished product. Thus, for example, you can get forgings with the core.

In most cases, preliminary profiling is carried out by precipitation and formation of the semi-finished product.

Depending on the complexity of the shape of the forging, forming a semi-finished product is conducted for one or more transitions.

In most cases, the formation of the semi-finished product can be done without crowding out of the overflow.

In some cases it is possible displacement of scrap in the process of forming the semi-finished product.

P and the location of the greater part of the forgings in the upper half of the stamp forming at least a region of the forging in the transition zone of the bottom surface side. In this same area have the gap between the two halves of the stamp.

At the location of the greater part of the forgings in the lower half of the stamp forming at least a region of the forging in the transition zone of the upper end surface in the side. In this same area have the gap between the two halves of the stamp.

In some cases, for example, if the forming-side surface of the forgings is a polygonal line with a maximum diameter in the area of the lateral surface, it forms the last part, the region of the forging in the area of the lateral surface. Here come the gap between the two halves of the stamp.

If the forging has a hole, it is possible during the final stamping to displace the excess metal in the scrap and the jumper.

Comparative analysis of the proposed technical solution with the prototype shows that the inventive method of manufacturing forgings differs from the prototype.

In the method prototype excess (relative to the volume of forgings) metal displace in oblasnoy the groove with the bridge and the store, which features without taking into account the kinematics of metal flow. The amount of excess metal that is displaced into the overflow, caused by two factors: inaccurate cutting and the need to create a backwater. Due to deformation of the extruded into a scrap metal create a layer and fill the engraving of the stream. So, now the La metal part is pressed into the overflow, and then it is filled engravings of the stream and thereby formalized the forging. Displaced in the scrap metal is assigned when the design process and plays a technologically necessary to fill the cavity stamp role. Then it is removed as waste.

In the proposed method, the excess metal displace in the gap, which does not contain a bridge. The deformation of the fin is not provided. He technologically, to fill the cavity of the stamp is not needed and already at the design stage is not assigned. The presence of the Burr is associated only with inaccurate cutting of the original piece. Therefore, the total amount of scrap less.

In the proposed method, the gap feature with regard to the kinematics of metal flow, namely in the field of forging formed last.

In the prototype dimensions are in contact with the metal surfaces of the tool consists of surfaces of prints and surfaces ablounge bridge.

In the proposed method, the sizes of the contacting metal surfaces of the tool consist only of the surfaces of prints, i.e., not exceed the size of forgings.

These distinctive features provide the possibility of obtaining forgings with less effort and less cost to the metal. This is a high tool life.

Thus, this solution meets criter the Yu of "novelty."

The analysis of patents, patents and scientific and technical information revealed no new significant features of the present invention according to their functional purpose. Thus, the proposed solution meets the criterion of "inventive step".

Figure 1 presents technological transitions stamping; figure 2 - the end of the deformation process upset billets, semi-finished and finally stamped forgings with overflow.

The method of manufacture of forgings is implemented as follows.

Monotonous forgings get a few transitions, for example three, in which pre-cut from the rod and heated source of the workpiece 1 rebuff, receiving the workpiece 2, then form a semi-finished product 3, then, by deforming the semi-finished product, get permanently stamped forgings 4 fin 5, the jumper 6. Then cut off the fin 5 and punch jumper 6 and get forgings 7.

The source of the workpiece 1, obtained from a rod, rebuff between the inserts 8 and 9. Inserts can be flat or shaped contact surface. In the particular case to obtain a strictly defined lateral surface after precipitation, the precipitate is carried out in the ring. As a variant, it is possible sediment into a ball.

Obtained in the first transition is mounted the workpiece 2 transmit ustamp second transition, which consists of a matrix 10, the punch 11 and the ejectors 12 and 13. Upset the workpiece 2 is installed in the cavity of the matrix 10. When the movement of the press slide down the punch 11 in the matrix 10 deforms upset the workpiece 2, forming a semi-finished product 3. The semi-finished product 3 is extracted from the matrix 10 by the ejector 12 or separated from the plug 11 of the ejector 13. The resulting intermediate product is placed in the stamp of the third transition, consisting of a matrix 14, the punch 15, ejectors 16 and 17. When the movement of the press slide down the punch 15 deforms the semi-finished product 3 in the matrix 14. The result is stamped in the final stamp forging 4 fin 5 and the bridge 6. After completion of process of deformation of the press slide is lifted up, forgings 4 is removed from the matrix 14 of the ejector 16 or removed from the punch ejector 17. Trimming Burr 5 and punching holes carry on the trim press one of the known methods, for example, A. Bryukhanov. Forging and die forging. M: mechanical engineering, 1975, 408 S. Il. s-364.

Specific example forgings forgings coupling the left Cup of steel HIT THE 14-1-3324-82

Original blank cut from a rod with a diameter of 56 mm, the result billet height 91±1.5 mm and Then heated in an induction heater to forging temperature and serves to heat punching stamp press 100mn first stamping, rebuff to get the barrel height 31,5 mm and a diameter of 102,5 mm Upset billet shift to the next stream and form a semi-finished product with the largest size in terms of diameter 103,1 mm, height 47 mm At this end surface of the semi-finished from top to remain free. Prefabricated shift in the final stream and in the deformation process are forging diameter 103,5 mm, displacing the metal in the scrap without backwater. The maximum diameter of the contact surface of the upper half of the stamp equal 103,1 mm, i.e. does not exceed the diameter of the forging.

Compared with the prototype of the proposed method for the manufacture of forgings is implemented with less effort and more economical.

1. A method of manufacturing forgings, including the production of the original piece, heat, advanced profiling, the final forging open die having upper and lower halves, with the exclusion of the excess metal in the gap between the upper and lower halves of the die and trimming Burr, characterized in that during the final stamping uses a public stamp, in which the gap between the upper and lower halves is in the field of forging formed in the last turn, and the sizes of the contacting metal surfaces of engravings of these halves does not exceed the corresponding dimensions on ovci to prevent deformation of the extruded excess metal.

2. The method according to claim 1, characterized in that the preliminary profiling is carried out by precipitation.

3. The method according to claim 1, characterized in that the preliminary profiling is carried out by rolling and forming semi-finished product.

4. The method according to claim 1, characterized in that the preliminary profiling is carried out by precipitation and formation of the semi-finished product.

5. The method according to claim 4, characterized in that the formation of the semi-finished product perform for several transitions.

6. The method according to claim 4, characterized in that the formation of the semi-finished product can be done without crowding out of the overflow.

7. The method according to claim 4, characterized in that the formation of the semi-finished product is carried out with the exclusion of the overflow.

8. The method according to claim 1, wherein forming at least the region of the forging in the transition zone of the bottom surface in the side.

9. The method according to claim 1, wherein forming at least the region of the forging, located in the transition zone of the upper end surface in the side.

10. The method according to claim 1, wherein forming at least the region of the forging in the area of the lateral surface.

11. The method according to claim 1, characterized in that the excess metal displace in the overflow and the jumper.



 

Same patents:

The invention relates to the processing of metals by pressure and can be used in the manufacture of laminated products sleeve or tubular type

The invention relates to the field of metal forming and can be used to obtain accurate parts details drive type complex shapes with significant variations in thickness and diameter and with a deep estampame odnotrahniki made of truttiformis multiphase alloys, in particular of heat-resistant Nickel alloys

FIELD: plastic working of metals, possibly forging shops of metallurgical and machine engineering factories at making automobile wheels and similar products.

SUBSTANCE: method comprises steps of preparing initial blank by hot die forging; forming intermediate semi-finished product in the form of cup with wall passing to its bottom and with front rim in bottom zone and back rim near free end of cup; calibrating received intermediate semi-finished product according to final size between rims due to changing cup depth at applying deforming effort along axis of sleeve to back rim or to near-bottom portion of sleeve and fixing other of said two portions. Then calibrated semi-finished product is subjected to heat treatment and mechanical working.

EFFECT: possibility for producing semi-finished products of wheels with different distances between rims due to using universal fitting that needs only minimized tuning.

5 cl, 2 dwg, 4 ex

FIELD: metallurgy; metal plastic working.

SUBSTANCE: invention can be used in form forging shops of metallurgical and machine-building plant in manufacture of vehicle wheels and like articles. Proposed tool contains die and punch holder with punch and knock-out with shaped part movable relative to die. Punch is enclosed by replaceable round holder with support flat and support surface. Die is provided with socket in upper part whose diameter corresponds to outer diameter of holder, and with support flat. Holder is installed for longitudinal displacement and engagement by its support flat and support surface with support flat of die and with punch holder, respectively. Shaped part of knock-out is made replaceable to provide possibility of making wheels of different type-sizes using one tool.

EFFECT: enlarged operating capabilities.

2 cl, 2 dwg

FIELD: plastic working of metals, possibly in forging shops of metallurgical and machine engineering plants for making wheels of automobiles and similar articles.

SUBSTANCE: method comprises steps of preparing initial blank; forming intermediate semi-product in the form of cup having shaped bottom, wall, thickened part in zone of wall-to-bottom transition. Said thickened part is restricted at one side by surface of revolution, by annular protrusion on outer end of bottom and flange on end of wall. Intermediate semi-product is formed by two stages. At first stage bottom is partially punched for forming on outer end of bottom dead cavity and for forming on inner end of bottom central protrusion. Flange is formed on wall due to increasing thickness of wall near its end at keeping constant diameter dimensions of inner side. At second stage annular protrusion is formed and central zone of bottom is finally shaped due to lowering thickness of central protrusion while keeping its height. Simultaneously flange is formed on end of wall by its final size. Then blank is finally formed due to expanding annular protrusion on bottom of cup to other flange. Such sleeve is subjected to heat treatment and mechanical working.

EFFECT: enhanced strength characteristics of low-cost wheels.

3 dwg, 1 ex

FIELD: plastic working of metal, possibly in forging shops of metallurgical and machine engineering plants for making wheels of automobiles and similar articles.

SUBSTANCE: tool includes die, punch, knocking out member with shaped portion, unit for stepped regulation of bottom thickness and height of cup. Said unit is in the form of apparatuses for changing length of punch and depth of die. In upper part of punch female type yoke with through stepped opening is mounted. In upper part of die there is seat whose diameter dimension corresponds to outer diameter of yoke. Depth of die is changed by means of apparatus in the form of flat ring arranged over shaped portion of knocking out member. Apparatus for changing length of punch is in the form of flat round gasket arranged inside yoke over punch. Punch has in its upper portion large-diameter step corresponding to diameter of large step of yoke opening.

EFFECT: possibility for producing by means of one tool semi-finished products of wheels with different combinations of width and thickness values.

3 cl, 3 dwg

FIELD: plastic working of metals, possibly in forging shops of metallurgical and machine engineering plants for making motor vehicle wheels and similar products.

SUBSTANCE: method comprises steps of preparing initial axially symmetrical blank and piercing dead seat along axis of blank; forming intermediate semi-finished product in the form of cup with shaped bottom, wall, thickened portion in zone of wall-bottom transition restricted at inner side of cup by surface of revolution, by annular protrusion of outer end of bottom and by flange of end of wall; forming flange of wall due to applying axial effort to its end while increasing thickness of wall near its end at constant diametrical dimensions at inner side; then finally shaping blank at deforming annular protrusion of cup bottom to other flange and expanding from inside end portion of wall. Expression is given for relating geometry parameters of initial and final blanks. Then formed sleeves are subjected to heat treatment and mechanical working.

EFFECT: enhanced quality of ready products due to providing rational structure of fibers at deforming blank and due to enhanced strength characteristics of fibers in condition of cyclic loading during exploitation.

3 dwg, 1 ex

FIELD: plastic working of metals, possibly in forging shops of metallurgical and machine engineering plants for making motor vehicle wheels and similar products.

SUBSTANCE: method comprises steps of preparing initial blank; forming intermediate semi-finished product in the form of cup with flange on end of wall and with annular protrusion on outer end of bottom; forming flange of wall due to increasing thickness of wall near its end at constant diametrical dimensions at inner side of wall; then finally shaping blank with two beads; forming ne bead due to deforming flange of cup wall at expanding wall from inside at least in zone of its end; forming other bead due to expanding annular protrusion to cone at conicity angle of inner surface of protrusion in end zone exceeding conicity angle in zone adjacent to cup bottom; determining geometry sizes of semi-finished product and final blank according to given relations; then performing heat treatment and mechanical working of products.

EFFECT: significantly decreased cost of small lots of products.

2 dwg, 1 ex

FIELD: plastic working of metals, possibly in forging shops of metallurgical and machine engineering plants for making motor vehicle wheels and similar articles.

SUBSTANCE: method comprises steps of preparing initial blank; then forming intermediate semi-finished product in the form of cup having shaped bottom, wall, thickened portion in zone of wall-bottom transition restricted at inner side of cup by surface of revolution, by annular protrusion on outer end of bottom and by flange on end of wall; forming flange of wall due to applying axial effort to its end at increasing wall thickness while keeping stable diametrical dimensions at inner side of wall; then finally shaping bushing due to expanding wall until final diametrical dimensions of its flange and deforming annular protrusion on cup bottom to other flange; restricting the last in peripheral zone of its outer end by cone surface of revolution having apex in axis of bushing; selecting conicity angle of said surface in predetermined range; realizing heat treatment of formed bushings.

EFFECT: enhanced strength characteristics of wheels in condition of cyclic loading during exploitation.

2 dwg, 1 ex

FIELD: plastic working of metals, possibly in forging shops of metallurgical and machine engineering plants for manufacturing automobile wheels and similar products.

SUBSTANCE: method comprises steps of preparing initial blank; forming of it intermediate semi-finished product in the form of cup having shaped bottom, wall and in zone of transition of wall to bottom - thickened portion defined at inner side of cup by surface of revolution, by annular protrusion on outer end of bottom and by flange on end of wall; making central protrusion on inner end of bottom; forming flange on wall by applying axial effort to its end for increasing thickness of wall having constant diametrical size at inner side; then finally shaping blank due to expanding annular protrusion on bottom of cup for forming other flange. Blank is finally shaped during two stages. At first stage height of central protrusion of bottom is increased due to radial motion of bottom material from its center and simultaneously thickness of said protrusion and diametrical size of bottom with flange are decreased, part of wall adjoined to bottom is thickened. At second stage sleeve is calibrated from inside for achieving final diametrical size of its cavity. Then bushings are subjected to heat treatment and mechanical working.

EFFECT: enhanced strength characteristics of reduced-cost wheels.

3 cl, 3 dwg, 2 ex

FIELD: instrument engineering.

SUBSTANCE: according to the method the blank of hanger is made taking direction of rolled stock into account. Then blank is subject to thermal processing, both sides of blank are cleared from material and hanger is formed by means of double-sided shaped embossing. According to the first variant of the method, blank is subject to heat-cyclical processing prior to double-sided embossing. According to the second variant, double-sided shaped embossing is made in two steps and heat-cyclical processing is performed between those two steps.

EFFECT: prolonged life of hanger; increased service life of press tool.

2 dwg, 2 ex

The invention relates to the processing of metals by pressure and can be used in forging shops of metallurgical and machine-building plants in the manufacture of car wheels and similar products

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 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

The invention relates to the processing of metals by pressure and can be used to obtain the forging of ingots and pre deformirovannykh billets for forging complexes

The invention relates to the processing of metals by pressure and can be used in the manufacture of forgings by forging

The invention relates to the field of metal forming

The invention relates to the processing of metals by pressure, and is intended for manufacture by forging on the universal stamping equipment ring forgings without stamping gradients

The invention relates to the production of core products with head

The invention relates to the processing of metals by pressure and can be used to obtain large parts such as disks, rings, flanges, bandages, etc
Up!