Method for making two-flange bushings

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

 

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 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. 1996).

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, such as car 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, bounded on the inner side of the bowl surface of rotation, an annular protrusion on the outer face of the bottom flange on the wall, the final shaping of the workpiece, including the deformation of the annular protrusion Nadine bowl in the other 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.

The proposed method for the manufacture of glasses with two flanges, such as car wheels, includes 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 deformation of the annular lip on the bottom of the bowl to the second flange. The annular ledge inside perform cone.

When forming the intermediate semi-finished 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. When the final shaping of the workpiece wall from the inside to give the final Diametric size of its flange, and when the deformation mentioned annular ledge in the other flange Ogre is nicepaul last in the peripheral zone of its outer end a conical surface of rotation with the vertex on the axis of the semi-finished product. Then conduct the heat treatment and mechanical processing.

The proposed method differs from the prototype in that the formation of intermediate semi-finished 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, and when the final shaping of the workpiece wall from the inside to give the final Diametric size of its flange, and when the deformation mentioned annular ledge in the other flange to limit the latter in the peripheral zone of its outer end a conical surface of rotation with the vertex on the axis of the semi-finished product, with the angle of taper α this surface is determined by the dependence of 75°≤α≤88°30’.

The technical result of the invention is improving the quality of finished products due to the rationalization of the structure of the fibers during deformation and improve the strength characteristics under conditions of cyclic loading during operation.

The present invention is illustrated in the drawing, which shows:

figure 1 - the formation of an intermediate material;

figure 2 - the final shaping of the glass.

EXAMPLE.

Produced sports wheel sizes 13"×19" alloy system magnesium - lithium is. Source procurement 1 (figure 1) size ⊘500 mm × 110 mm weight 40 kg was heated and placed in the cavity of the stamp 2 with shaped ejector 3 and the other one 4. Applied deforming force P1and backward extrusion of the formed cake mix in a bowl height H=400 mm, outside diameter D1=505 mm and a wall thickness of S=10 mm at the same time as the axial force acted on the open end of the Cup, the flange 6 is formed by increasing the thickness of the wall 5 at the end S=25 mm, while maintaining the internal diameter of D2constant. The outer surface of the bottom part formed annular protrusion 7 with the inner conical surface of rotation. The transition zone from the bottom 8 of the wall 5 has performed thickened. Thickening 9 limited inside conical surface of rotation. In the final formation of the finished glass, applying an axial force of P2wall 5 from the inside distributed in the area of the end face by the end Diametric dimensions flange rear flange 10 wheels with a diameter of D3=526 mm In contact with the thickened end part and a tapered part of the plug 11, respectively, with the flange 10 and thickening 9 continued final shaping. The glass is moved along the axis, deforming the annular protrusion 7. When this metal is displaced in the radial direction, forming a second flange - front R the Board 12, the diameter D5=528 mm limited annular stop 13. Forming the front flange in a peripheral zone of its outer end perform with the formation of the conical surface 14 with the apex on the axis of the Cup and cone angle α=86°start on the plane 15 of the outer end face with a diameter of D6=505 mm and then were heat treatment and mechanical processing.

Thus, the proposed method can improve the quality of finished products, mainly automobile wheels sports cars, thanks to the rationalization of the structure of the fibers during deformation and prevent cracking during formation of ribs.

The method of manufacture of glasses with two flanges, such as car 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 formation of the glass, including the deformation of the annular lip on the bottom of the bowl in the other flange, heat treatment, characterized in that when forming the intermediate semi-finished flange on the wall of the form, applying axial force to its end, by increasing the women of the wall at the end at its permanent diametrically sizes on the inside, in the final formation of the glass wall from the inside to give the final Diametric size of its flange, and when the deformation mentioned annular ledge in the other flange to limit the latter in the peripheral zone of its outer end a conical surface of rotation with the vertex on the axis of the glass, the angle of taper α this surface is determined from the range of 75°≤α≤88°30’.



 

Same patents:

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

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The invention relates to the processing of metals by pressure and is aimed at improving the technology of manufacturing products of the type wheels by stamping and rolling

The invention relates to the field of metal forming and can be used in the manufacture of wheels, including automotive vehicles

The invention relates to the processing of metals by pressure and can be used in the manufacture of automotive wheel drive

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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