Method for making two-flange sleeves

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

 

The invention relates to the field of metal forming and can be used in forging shops of metallurgical and machine-building plants in the manufacture of automobile wheels and the like products.

A known method of manufacturing products of the type wheels, including the preparation of the original piece, forming an intermediate semi-finished product in the form of a bowl, education annular ledge and the ridge on the bottom of the bowl, forming on the Cup flange and the disk part with a relief, the formation of the rim and the other flange of an annular ledge, and thermal and mechanical processing (Patent RF №2063838, CL 21 To 1/28, publ year).

The disadvantage of this method is the complexity of die tooling, and low productivity due to the need to implement a large number of process steps of processing by pressure.

A known method of manufacture glasses with the two flanges, for example, road wheels, including the preparation of the original piece, the formation of intermediate semi-finished product in the form of a bowl shaped bottom wall thickening in the transition wall in the bottom, limited to the inside of the bowl surface of rotation, an annular protrusion on the outer face of the bottom flange on the end wall, the final shaping of the workpiece, including the distribution of an annular protrusion on the bottom of the bowl in the other the second flange, heat treatment and mechanical processing (Patent RF №2135320, CL 21 To 1/28, publ. 1999 - prototype).

The disadvantage of this method is the difficulty of ensuring the desired quality of the finished products due to a lack of rational structure of the fibers during deformation that affects the strength characteristics under conditions of cyclic loading during operation and specialization receive blanks, which significantly increases the cost of manufacture of small batches of wheels. The last is most important for wheels sports cars, the shape and dimensions of which are strictly individualized to fit the requirements of each Customer.

The proposed method for the manufacture of glasses with two flanges, for example, vehicle wheels includes the preparation of the original piece and the formation of intermediate semi-finished product in the form of a bowl shaped bottom wall thickening in the transition wall in the bottom, limited to the inside of the bowl surface of rotation, an annular protrusion on the outer face of the bottom flange on the end wall. Then finally form the workpiece by hand annular ledge at the bottom of the bowl in the other flange.

Thus formation of an intermediate semi-finished product is carried out in two stages. In the first stage, perform incomplete firmware bottom, forming on the outer edge of the bottom blank cavity, and on the inside is it the end - the Central ledge. The flange on the wall of the form, applying axial force to its end, by increasing the wall thickness at the end with her constant diametrical sizes on the inside. In the second phase to form an annular ledge, and finally form the Central zone of the bottom, reducing the thickness of the Central protrusion, while maintaining its height, and increase the depth of a blind cavity with decreasing thickness of the bottom. At the same time finally form the flanges on the end walls.

After the final formation of the blanks are heat treatment and mechanical processing.

The proposed method differs from the prototype in that the formation of intermediate semi-finished product are in two stages: first perform an incomplete firmware bottom, forming on the outer edge of the bottom blank cavity, and on the inner side of the Central protrusion, the flange on the wall of the form, applying axial force to its end, by increasing the wall thickness at the end with her constant diametrical sizes on the inner side, and the second form annular ledge and finally form the Central zone of the bottom, reducing the thickness of the Central protrusion, while maintaining its height and increasing the depth of a blind cavity while reducing the thickness of the bottom, and also finally form the flanges on the end walls.

T the economic results of the present invention is the possibility of batch processing close to the geometrical parameters of the wheels when the rational structure of the fibers during deformation, which allows to combine high strength characteristics under conditions of cyclic loading in extreme conditions and low-cost wheels. This is particularly important in the manufacture of small batches of sport wheels with significant hub part (Central projection).

The invention is illustrated by drawings, which show:

figure 1 - formation of intermediate semi-finished product, the first stage;

figure 2 - formation of intermediate semi-finished product, the second stage;

figure 3 - the final formation.

Example.

Produced sports wheel 13×21’ aluminum alloy type 6061. Source procurement 1 size ⊘500 mm ×125 mm weight 66 kg was heated and placed in the cavity of the stamp 2 with shaped ejector 3 and the plug 4 (figure 1).

At the first stage of formation of the intermediate semi-finished product was applied deforming force and backward extrusion of the formed cake mix in a bowl height H=400 mm, outside diameter D1=505 mm and wall thickness 5 s=10 mm at the same time as the axial force acted on the open end of the Cup shaped flange 6 by increasing the thickness of the wall 5 at the end s=25 mm, save the I inner diameter D 2- permanent. The outer surface of the bottom part formed blank cavity 7 depth C1=60 mm, the transition Zone from the bottom 8 of the wall 5 has performed thickened. Thickening 9 internally limited to a conical surface with a cone angle α=37°the form and dimensions of which are connected with the wheel design and the defined cone part 10 of the punch 4. At the end of the punch 4 is made of the cavity 11, which forms at the final stage of the first phase of the Central projection 12 of a thickness of1=95 mm

At the second stage - replaced the ejector 3, the ejector 13 and applied deforming force to the end face 6 of the workpiece and the whole inner surface. When it started to deform the Central protrusion 12, reducing its thickness In1from 95 mm to2=80 mm, while maintaining its height H1. Simultaneously, the wall 5 of the bowl together with the flange 6 is moved downward (figure 2}.

At the final stage of the process was begun, the deformation of the bottom 8 to the reduction of its thickness. It was formed annular protrusion 14, and the depth of a blind cavity 7 is increased to a value of2=75 mm Diameter hollow cavity were reduced to the final size. While the size of the flange 6 formed on the final.

Such a process of forming an intermediate semi-finished product allows the first stage to create this configuration merchantable and, which in the second step ensures that the configuration of the die, the workpiece is free of ring zones. These areas consistently determine the local displacement of metal, precluding the formation of any defects and dramatically reduce the average pressure in the cavity of the die, increasing its durability.

At the same time, such a programmable local moving metal can reduce the allowances, to ensure the high strength characteristics at harvest and to complicate the configuration of the products.

The final formation led by the hand on the plate 15 of the annular protrusion 14 on the bottom of the bowl in the other flange 16 (Fig 3). After that was carried out by thermal and mechanical treatment of the product received in the wheel.

The proposed method can significantly expand the range and improve the quality of finished products, rationalization of the die tooling and, consequently, to improve the structure of the fibers during deformation and to prevent cracking during formation of ribs. The latter is particularly important in the production of alloys of the system magnesium - lithium.

The method of manufacture of glasses with two flanges, for example, road wheels, including the preparation of the original piece, the formation of intermediate semi-finished product in the form of a bowl shaped bottom wall thickening when PE is ahode the wall at the bottom, limited to the inside of the bowl surface of rotation, an annular protrusion on the outer face of the bottom flange on the end wall, the final shaping of the workpiece, including the distribution of an annular protrusion on the bottom of the bowl in the other flange, heat treatment and machining, characterized in that the formation of intermediate semi-finished product are in two stages: first perform an incomplete firmware bottom with the formation on the outer face of the bottom of the hollow cavity, and on the inner side of the Central protrusion, the flange on the wall of the form, applying axial force to its end, by increasing the wall thickness at the end with her constant diametrical sizes with inner side, and the second form annular ledge and finally form the Central zone of the bottom, reducing the thickness of the Central protrusion, while maintaining its height and increasing the depth of a blind cavity while reducing the thickness of the bottom, and finally form the flanges on the end walls.



 

Same patents:

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

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

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: 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

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: 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 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 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 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 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: 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 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: 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

Up!