Method for forming double-flange sleeves

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

 

The present 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 manufacture glasses with the two flanges (car wheels), including the processing of hot rolling (rolling) of the original piece with the formation of intermediate semi-finished product in the form of a bowl with the wall, passing in the bottom, and the front flange in the area of the bottom and rear flange at the free end of the bowl (Lsoloviev. Factory BBS in Sillage. Automobile Revue. No. 1. 2008, p.2).

The disadvantages of this method are relatively low strength characteristics of the finished wheel.

A known method of manufacture glasses with the two flanges, mainly automobile wheels, including the preparation of the original piece, the formation of hot by forging intermediate semi-finished product in the form of a bowl with the wall, passing in the bottom, and the front flange in the area of the bottom and rear flange at the free end of the bowl, heat treatment and mechanical processing (see RF patent №2063837, CL 21 To 1/28, publ. 1996 - prototype).

The disadvantages of this method are the high unit cost (one wheel) specialized die tooling for specific Timor is smera wheels when making them in small batches, as well as the considerable effort required to transition to the other wheel. Technological preparation of production wheels this way takes a long time.

The proposed method for the manufacture of glasses with two flanges, mainly automobile wheels includes the preparation of the original piece and the formation of hot by forging intermediate semi-finished product in the form of a bowl with the wall, passing in the bottom, and the front flange in the area of the bottom and rear flange at the free end of the bowl. Then the semi-finished product is calibrated on the final size of the distance between the wheels by changing the depth of the Cup, applying a deforming force along the axis of the Cup to one of the pair of elements: rear flange - portion of the glass in the area of its bottom and holding another item mentioned pair motionless.

The distance between the wheels can be reduced by applying a compressing force to the rear flange and retaining a portion of the glass in the area of the bottom of the still, or to increase, while applying stretching force to the side of the glass in the area of its bottom and holding the rear flange motionless.

After the above calibration can emboss the bottom of the glass. Then conduct a heat treatment and mechanical processing.

The proposed method differs from the prototype in that the semifinished product is calibrated on the final size of the distance between the wheels by changing the depth h is Chi, applying a deforming force along the axis of the Cup to one of the pair of elements: rear flange - portion of the glass in the area of its bottom and holding another item mentioned pair motionless.

The distance between the flanges is reduced by applying a compressing force to the rear flange and retaining a portion of the glass in the area of the bottom of the still, or increases, while applying stretching force to the side of the glass in the area of its bottom and holding the rear flange motionless. After the above calibration can emboss the bottom of the glass.

The technical result of the invention is the ability to group processing close to the geometrical parameters of the wheels in the universal snap-fit as to reduce, or to increase the distance between the flanges with a minimum of readjustment within the concept of flexible production.

The invention is illustrated by drawings, which shows the mutual arrangement of the semi-finished product and parts: left - before calibration, right after its completion.

Figure 1 - reduction of the distance between the flanges;

figure 2 - increase the distance between the ribs.

Prepared original cylindrical workpiece (not shown) hot by forging deform with the formation of intermediate semi-finished product in the form of a bowl with the wall 1, passing in the bottom 2, and the front flange 3 in the area of the bottom 2i of the rear flange 4 at the free end 5 of the bowl.

Snap to calibrate the compression of the semi-finished product (figure 1) consists of two half rings 6 and 7, placed in a round mandrel 8. The latter is mounted for axial movement in a vertical hole 9 hours, mounted on the table 10 of the press. Parts 8 and 9 articulated elastic element 11. Axial movement of the mandrel 8 is limited by the stop 12. On the table 10 fixed base plate 13 about the opening 14 for the passage of the ejector 15. On slide 16, the press enshrined calibration plug 17 with a cylindrical and conical 18 plots. Round ferrule 19 of the Central hole comprises a cylindrical section 17 of the punch. The holder 19 is fixed on the slide 16 via the remote ring 20.

Calibration compression prefabricated perform the following way. Push the table 10 of the press. Cake mix in a bowl with the wall 1, a bottom 2 and the flanges 3 and 4 is lowered into the bore of the mandrel 8 is approximately half the height of the semi-finished product. With the two sides move with coverage of the wall 1 horizontally to the closure of half rings 6 and 7 and put them in the mandrel 8. Then lowered completely prefabricated until it touches the flange 4 with the half-rings 6 and 7. Between the end face of the semi-finished product from its bottom 2 and converted to the semi-finished surface plate 13 is provided gap Δ1.

The table 10 is moved to its working position. When lowering of the RAM 16 down the surface Aboyne 19 presses the end face 5 of the flange 4 to the half-rings 6 and 7. The flange 4 is the effect of the axial force, the semi-finished product is moved down. The elastic element 11 is deformed. Upon further lowering of the RAM 16, the sample gap Δ1and the rest part of the glass in the area of the bottom plate 13, the distance between the flanges 3 and 4 is reduced by reducing the depth of the bowl, as part of the glass in the area of its bottom is fixed, and the rear flange 4 through the surface 19 is transmitted deforming force of compression.

The depth of the bowl before calibration N1after the H2and N1>H2. The internal surface of the wall 1 is based on the tapered section 18 of the punch.

Reducing the distance between the flanges 3 and 4 is accompanied by a thickening of the wall 1.

The distance between the flanges before calibration - K1after the K2and1>2.

Wall thickness before calibration - S1after the S2and S1<S2.

The calibration process can be completed before the end 22 of the punch touches the bottom 2. If the plug is lowered further, then touch the end face 22 with the inner surface of the bottom 2 begins the process of stamping with final design elevation of the bottom 2.

Snap to calibrate the tension of the semi-finished product (figure 2) contains the same elements as previously described. Only instead of the elastic element 11 and stop 12 is mounted remote ring 23. The mandrel 8 chere the C ring 23 mounted on the rack 9. On the slide instead of the remote ring 20 is mounted elastic element 24 coupled to the slider 16 and the yoke 19. The yoke is mounted for axial movement relative to the slider 16 on the cylindrical section 17 of the plug is limited by the stop 25.

Calibration stretch semi carry out as follows. Prefabricated load in a snap for calibrating a tension similar to that described above. Between the bottom 2 and the surface plate provides clearance Δ2. When lowering of the RAM 16, the surface 21 of the shroud 19 presses the end face 5 of the flange 4 to the half-rings 6 and 7, providing its immobility.

The elastic element 24 is deformed. Further lowering of the RAM 16 is accompanied by its relative movement with respect to stationary casing 19. Punch your butt 22 touches the bottom 2 of the semi-finished product and, falling, increases the distance between the flanges 3 and 4 by increasing the depth of the bowl, as the rear flange 4 is fixed, and the bottom 2 through the end 22 is passed to a deforming force stretching.

The depth of the bowl before calibration - H3after the H4and N3<H4. The internal surface of the wall 1 snugly over the tapered section 18 of the punch.

The increase of the distance between the ribs accompanied by a thinning of the wall 1. The distance between the flanges before calibration - K3, after - K4and3<To4.

Wall thickness before calibration - S3after the S4and S3>S4.

The calibration process can be completed before the bottom 2 touches the plate 13. If the punch is omitted on selected clearance Δ2and tapping the bottom 2 with the plate 13 begins the process of stamping with final design elevation of the bottom 2.

The calibration process as compression and stretching can be performed more than once.

A calibrated semi-finished product was extracted from snap to calibrate both compression and tension as follows.

Moved the slider punch up, bringing him out of the semi-finished product. Ejector raised so that the front flange 3 is pushed half rings 6 and 7 of the mandrel 8, because the movement of the latter is limited either by attaching it to the rack 9 (1), or - emphasis 12 (figure 2).

Half rings 6 and 7 are separated from the semi-product. Then put the semi-finished product moving down eject before placing the semi-finished product on the plate 13.

Advanced table 10 from the working area of the press and took a calibrated semi-finished product from the snap.

Examples of the method.

Example 1.

Cylindrical billet of aluminum alloy 6061 is one of the known methods of hot die forging converted into intermediate prefabrica the wheels 7,5× 17" in the form of a conical bowl with a bottom 2, flange (front flange 3 in the area of the bottom conical wall 1 to the rim and a second flange, rear flange 4) at the free end of the bowl. The total height of the bowl h1=220 mm

The diameter of the flanges D=478 mm wall Thickness S1=12 mm, Angle α taper wall AC from 1 to 3°.

The intermediate product was heated and fixed by the method described above to apparatus for calibration of compression. Deformed semi-finished product with an average degree of deformation of 17% to the size of the h2=182,4 mm, which corresponds to the size of the wheels 6×17". During precipitation the wall 1 begins to rely on cone 18 plot punch, maintaining stability and buying on the inner surface shape of the latter.

After calibration the bottom of the prefabricated minted punch on the plate 10.

In further performed a complete thermal and mechanical processing for obtaining wheel 6×17".

Example 2.

For sensitive products, for example, high-speed wheels for sports of the highest achievements of the calibration process compression for the same cake mix was divided into stages:

a) pre - degree strain ~(14-16)%;

b) the final - with the degree of deformation ~(0.5 to 3)% in svezhenanesennom condition with subsequent final heat treatment (aging).

In further held machining to obtain so the th same wheels 6× 17″.

This variant of the process dramatically reduces the amount of residual stresses, which eliminates warping of the finished wheel.

Example 3.

Magnesium alloy type Z80 AND similar to that described in example 1 produced an intermediate semi-finished wheels 6×17", Cup c, the inner diameter of the rear flange 4 d=420 mm and an angle of taper of the wall α=4°. Wall thickness S3=15 mm and the total height of the bowl h3=190 mm

The intermediate product was heated and fixed by the method described above to apparatus for calibration of a stretch. Deformed semi-finished product to the final size of the h4=237 mm, which corresponded to the sizes of the finished wheel 8×17".

The average degree of deformation in the height of the bowl was ~25%, a actual on the wall ~31%.

In the process of stretching the wall 1 bowl covered cone 18 plot punch, buying on the inner surface of the wall form of the latter, i.e. avoiding distortion of the geometric shape of the wall.

Example 4.

Similar to that described in example 3, the semi-finished product, but less ductile magnesium alloy MA. The size and shape of the punch and half-rings 6 and 7 are selected such that upon contact of the end face 22 of the punch with the bottom 2 of the semi-finished product was a pinched radial semi-finished product between the surface of the conical section 18 and the inner surface poloko the EC 6 and 7, first by the maximum diameter of the punch and upon further lowering of the punch to force the stretching of the wall adds a shearing force as wrapping the wall 1 of the conical section 18. This strain pattern has significantly optimize the calibration process and to obtain a calibrated semi-finished product of the same dimensions as in example 3.

Thus, the proposed method under the concept of "flexible" production calibrate "universal" semi wheels on different distances between the flanges, there is a wide range of sizes of wheels can be obtained by group processing. It is especially important to get hot by die forging of prototypes and small (pre-production) batches of automotive wheels from aluminum and magnesium alloys with the structure, providing optimum strength characteristics of the wheels in terms of their dynamic loading during operation.

1. The method of manufacture of glasses with two flanges, mainly automobile wheels, including the preparation of the original piece, the formation of hot by forging intermediate semi-finished product in the form of a bowl with the wall, passing in the bottom, and the front flange in the area of the bottom and rear flange at the free end of the bowl, heat treatment and machining, characterized in that the semifinished product is calibrated on the final size of the distance between the flanges by the application of deforming efforts along the axis of the Cup to one of the elements of the pair of rear flange is part of the glass is in the area of its bottom, and hold another item mentioned pair motionless with the depth of the bowl.

2. The method according to claim 1, characterized in that the distance between the flanges is reduced by application of the compression force of the rear flange and retaining part of the glass in the area of the bottom of the still.

3. The method according to claim 1, characterized in that the distance between the wheels is increased by the application of force stretching towards the side of the glass in the area of its bottom and hold the rear flange motionless.

4. The method according to claim 1, characterized in that after the above calibration emboss the bottom of the glass.

5. The method according to claim 1, characterized in that the prefabricated calibrated more than once.



 

Same patents:

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.

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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.

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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

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