CN112170748A - Ti2Rolling forming method of AlNb-based alloy basin-shaped ring forging - Google Patents
Ti2Rolling forming method of AlNb-based alloy basin-shaped ring forging Download PDFInfo
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- CN112170748A CN112170748A CN202011058502.1A CN202011058502A CN112170748A CN 112170748 A CN112170748 A CN 112170748A CN 202011058502 A CN202011058502 A CN 202011058502A CN 112170748 A CN112170748 A CN 112170748A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
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Abstract
The invention discloses a Ti2The roll forming method of AlNb-based alloy basin-shaped ring forging comprises the following steps of: heating the alloy rectangular pre-rolled blank, then loading the alloy rectangular pre-rolled blank into a ring rolling mill, starting a core roller to roll the pre-rolled blank on a rolling surface of the core roller at the speed of 0.4-0.7 mm/s, and controlling the rotating speed of a main roller at 10-15 rad/min; finishing the first rolling when the inclination angle of the part of the pre-rolled blank, which is not rolled, to the non-rolling surface of the core roller reaches 30-40% of the inclination angle between the non-rolling surface and the rolling surface of the core roller; and performing second rolling and finish rolling forming by the same method, keeping the height of the rectangular pre-rolled blank unchanged, gradually increasing the rolling speed and the rotating speed of the main roller until the inclination angle reaches 100% of the inclination angle between the non-rolling surface and the rolling surface of the core roller, and completely covering the part of the rectangular pre-rolled blank, which is not contacted with the rolling surface of the core roller, on the inclined surface of the non-rolling surface to finish rolling to obtain the basin-shaped ring forging. The ring forging is mainly used in the fields of aerospace and the like.
Description
The technical field is as follows:
the invention relates to a rolling forming method of a ring forging, in particular to a Ti2A rolling forming method of an AlNb-based alloy basin-shaped ring forging.
Background art:
the basin-shaped ring forging is a special shape of a special-shaped ring forging. Chinese invention patent CN 101279345A published in 10.08.2008 discloses a rolling forming method of a titanium alloy special-shaped ring forging, and the technical scheme is as follows: heating a titanium alloy bar blanked according to specifications, upsetting, punching and ring rolling to obtain a rectangular pre-rolled blank, heating the pre-rolled blank, and then loading the pre-rolled blank into a ring rolling machine rolling die, wherein the longitudinal section of the pre-rolled blank is rolled by the ring rolling machine in a special-shaped hole pattern of the rolling die and generates continuous local plastic deformation according to the hole pattern, and the wall thickness of the pre-rolled blank is reduced and is expanded along the radial direction to be rolled and deformed into a special-shaped ring forging.
According to the method, the rectangular pre-rolling blank can be rolled into the special-shaped ring forging by providing the rolling die, so that the manufacturing cost of the die is increased, the die is inconvenient to assemble and disassemble in the production process, the production preparation period is long, and the rolling process is unstable, so that the production efficiency is influenced.
The invention content is as follows:
the technical problem to be solved by the invention is to provide a core roller with a truncated cone-shaped non-rolling surface to realize Ti2The rolling forming method of the AlNb-based alloy basin-shaped ring forging piece has the advantages that the rolling process is stable and the production efficiency is improved through the size matching design of the pre-rolled blank and the ring forging piece and the selection of proper rolling parameters.
To solve the above problems, the Ti of the present invention2The rolling forming method of the AlNb-based alloy basin-shaped ring forging comprises the following steps of:
first, the prepared Ti2Heating AlNb-based alloy rectangular pre-rolling blank to deformation temperature, loading into a ring rolling mill, and allowing the longitudinal section of the rectangular pre-rolling blank to be in a rolling pass surrounded by a core roller, a main roller, an upper conical roller and a lower conical roller of the ring rolling mill, wherein the outer circular surface of the core roller consists of a cylindrical rolling surface and a truncated cone-shaped non-rolling surface, and the non-rolling surface and the rolling surface are arranged between the non-rolling surface and the rolling surfaceAngle of inclination alpha0；
Second, starting the ring rolling mill, wherein the rolling surface of the core roller is v1Feeding and rolling a rectangular pre-rolled blank in the direction of a main roller at a rolling speed of 0.4-0.7 mm/s, controlling the rotating speed of the main roller to be 10-15 rad/min, expanding a hole from inside to outside by the contact part of the rectangular pre-rolled blank and the rolling surface of a core roller under the action of rolling force, inclining the part of the rectangular pre-rolled blank, which is not in contact with the rolling surface of the core roller, to the non-rolling surface of the core roller while expanding the hole along with the contact part, and when the inclination angle alpha is larger than the preset value1To achieve an angle of inclination alpha between the non-rolled surface and the rolled surface030-40 percent of the strip thickness, finishing the first basin-shaped angle rolling of the rectangular pre-rolling blank to obtain the strip with the inclination angle alpha1The height of the first transition ring is equal to the height h of the rectangular pre-rolled blank0；
Thirdly, heating the first transition ring to the deformation temperature, and then rolling the first transition ring according to the method of the second step, wherein the rolling speed v of the rolling surface of the core roller in the third step2Controlling the rotation speed of the main roller to be 12-18 rad/min at 0.8-1.2 mm/s, continuously enlarging the hole of the first transition ring, continuously inclining the part of the first transition ring, which is not in contact with the rolling surface of the core roller, to the non-rolling surface of the core roller, and when the inclination angle alpha is formed2To achieve an angle of inclination alpha between the non-rolled surface and the rolled surface050% -60%, finishing the second basin-shaped angle rolling of the rectangular pre-rolling blank to obtain a strip with an inclination angle alpha2The height of the second transition ring is equal to the height of the first transition ring is equal to the height h of the rectangular pre-rolled blank0；
Fourthly, heating the second transition ring to the deformation temperature and then rolling the second transition ring according to the method of the second step, wherein the rolling speed v of the rolling surface of the core roller3Controlling the rotation speed of the main roller to be 13-20 rad/min at 1.3-1.6 mm/s, continuously enlarging the hole of the second transition ring, continuously inclining the part of the second transition ring, which is not in contact with the rolling surface of the core roller, to the non-rolling surface of the core roller, and when the inclination angle alpha reaches the inclination angle alpha between the non-rolling surface and the rolling surface0At 100%, i.e. α ═ α0While the second transition ring is completely covered on the inclined plane of the non-rolling surface with the part of the core roller not contacted with the rolling surfaceAnd finally rolling and forming the rectangular pre-rolled blank to obtain a finally rolled basin-shaped ring forging with an inclination angle alpha, wherein the height of the basin-shaped ring forging is equal to the height of the second transition ring and equal to the height of the first transition ring and equal to the height h of the rectangular pre-rolled blank0。
In order to ensure that the inclined plane part at the upper end of the basin-shaped ring forging can be fully deformed and formed in the rolling process, the size between the rectangular pre-rolling blank and the basin-shaped ring forging meets the following two conditions at the same time:
(1) D0＝(0.5～0.7)D
in the formula:
D0-the outer diameter of the rectangular pre-rolled billet, mm;
d, the outer diameter of the lower end face of the basin-shaped ring forging is mm;
(2)
in the formula:
d0-the internal diameter of the rectangular pre-rolled billet, mm;
D0-the outer diameter of the rectangular pre-rolled billet, mm;
d, the inner diameter of the lower end face of the basin-shaped ring forging is mm;
d, the outer diameter of the lower end face of the basin-shaped ring forging is mm;
h0-the height, mm, of the rectangular pre-rolled blank or the basin-shaped ring forging;
h1the height of the cylindrical part of the basin-shaped ring forging rolled by the core roller is mm.
Compared with the prior art, the invention has the following beneficial effects:
ti of the invention2A rolling method for AlNb-base alloy basin-shaped ring forge piece includes setting cylindrical rolling surface and non-rolling surface in truncated cone shape on external circular surface of core roller of ring rolling mill, rolling to enlarge one part of rectangular pre-rolling blank along longitudinal direction from internal circular surface to external circular surface by rolling hole enlargement of rolling surface of core roller, rolling to form basin-shaped blank by three times of basin-shaped angle rollingThe ring forging that appears, realized directly rolling the basin shape ring forging that belongs to special-shaped ring forging through the core roll and the main roll of ring rolling machine, need not provide the rolling mould promptly and realized the roll forming of special-shaped ring forging to save mould manufacturing cost, shortened production preparation cycle, better control the stability of rolling process, improved production efficiency.
When the first basin-shaped angle is rolled, the feeding rolling speed of the core roller is controlled to be 0.4-0.7 mm/s, the rotating speed of the main roller is controlled to be 10-15 rad/min, and the inclination angle of the other part of the rectangular pre-rolled blank which is not rolled is controlled to be 30-40% of the inclination angle between the non-rolling surface and the rolling surface of the core roller; when the second basin-shaped angle is rolled, the feeding rolling speed of the core roller is controlled to be 0.8-1.2 mm/s, the rotating speed of the main roller is controlled to be 12-18 rad/min, and the inclination angle of the other part of the rectangular pre-rolled blank which is not rolled is controlled to be 50-60% of the inclination angle between the non-rolling surface and the rolling surface of the core roller; during finish rolling, the feeding rolling speed of a core roller is controlled to be 1.3-1.6 mm/s, the rotating speed of a main roller is controlled to be 13-20 rad/min, and the inclination angle of the other part of the rectangular pre-rolled blank which is not rolled is controlled to be 100% between the non-rolling surface and the rolling surface of the core roller; in the third rolling process, the feeding rolling speed of the core roller and the rotating speed of the main roller are gradually increased from low to high, and the height of the rectangular pre-rolling billet is kept unchanged all the time through the control of the upper conical roller and the lower conical roller, so that the gradual formation of the basin-shaped surface and the stability of the rolling process are facilitated, and the finish-rolling basin-shaped ring forge piece with high quality is obtained.
When the design of the rectangular pre-rolling blank and the basin-shaped ring forging is carried out, the dimension between the rectangular pre-rolling blank and the basin-shaped ring forging simultaneously satisfies D0(0.5-0.7) D and
during rolling, the inclined plane part at the upper end of the basin-shaped ring forging can be fully deformed and formed, so that the structure and the performance of the basin-shaped ring forging meet the standard requirements.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a longitudinal cross-sectional view of a rectangular pre-rolled billet along its centerline.
Fig. 2 is a schematic view of a machine for producing a rectangular pre-rolled billet.
FIG. 3 is a schematic process diagram of a process for rolling and forming a basin-shaped ring forging from a rectangular pre-rolled blank.
Detailed Description
The basin-shaped ring forging rolling forming method needs to provide equipment such as a forging heating furnace, a press machine, a ring rolling machine, a manipulator and the like. Below with Ti2The specific embodiment of the method will be described in detail by taking an AlNb-based alloy as an example:
the method comprises the following steps: and rolling the rectangular pre-rolled blank.
Ti blanked according to specification2Heating the AlNb-based alloy bar stock, upsetting, punching and then ring-rolling the AlNb-based alloy bar stock into a rectangular pre-rolled blank 10. As shown in FIG. 1, the rectangular pre-rolled billet 10 has an outer diameter D0Inner diameter of d0Height of h0。
Step two: and (5) installing.
As shown in FIG. 2, a rectangular pre-rolled blank 10 is heated to a deformation temperature and then loaded into a ring rolling mill, so that the longitudinal section of the rectangular pre-rolled blank 10 is positioned in a rolling pass surrounded by a core roll 20, a main roll 30, an upper tapered roll 41 and a lower tapered roll 42 of the ring rolling mill, the outer circumferential surface of the core roll 20 is composed of a cylindrical rolling surface 21 and a truncated cone-shaped non-rolling surface 22, and the inclination angle between the non-rolling surface 22 and the rolling surface 21 is alpha0。
Step three: and rolling a first basin-shaped corner.
Fig. 3 shows a process flow diagram for the ring rolling of a rectangular pre-rolled blank 10. As shown in FIG. 3a, a ring rolling mill is started to roll a rectangular pre-rolled billet 10, and the rolling surface 21 of a core roll 20 is set at v1Feeding and rolling the rectangular pre-rolled blank 10 towards the main roll direction at a rolling speed of 0.4-0.7 mm/s, controlling the rotation speed of the main roll 30 at 10-15 rad/min, expanding the hole from inside to outside by the action of the rolling force on the part of the rectangular pre-rolled blank 10 in contact with the rolling surface 21 of the core roll 20, inclining the part of the rectangular pre-rolled blank 10 not in contact with the rolling surface 21 of the core roll 20 towards the non-rolling surface 22 of the core roll 20 while expanding the hole along with the part in contact, and when the inclination angle alpha is larger1The inclination angle alpha between the non-rolling surface 22 and the rolling surface 21 is achieved030% -40%, finishing rectangular pre-rollingFirst basin-angle rolling of the blank 10 to obtain a strip with an inclination angle alpha1The height of the rectangular pre-rolled blank 10 is kept constant by controlling the upper conical rolls 41 and the lower conical rolls 42 during the rolling process, i.e. the height of the first transition ring 11 is equal to the height h of the rectangular pre-rolled blank 100。
Step four: and rolling a second basin-shaped corner.
As shown in FIG. 3b, the first transition ring 11 is reheated to the deformation temperature and then rolled by the method of step three, in which the rolling speed v of the rolling surface 21 of the core roll 20 is set2The rotation speed of the main roller 30 is controlled to be 12 to 18rad/min at 0.8 to 1.2mm/s, the first transition ring 11 continues to expand and the portion of the first transition ring not in contact with the rolling surface 21 of the core roller 20 continues to incline toward the non-rolling surface 22 of the core roller 20, and when the inclination angle alpha is larger than a predetermined value2The inclination angle alpha between the non-rolling surface 22 and the rolling surface 21 is achieved050% -60%, finishing the second basin-shaped angle rolling of the rectangular pre-rolling blank 10 to obtain the strip with the inclination angle alpha2The height of the second transition ring 12 is equal to the height h of the first transition ring 11 is equal to the height h of the rectangular pre-rolled billet 100。
Step five: and (5) final rolling and forming.
As shown in FIG. 3c, the second transition ring 12 is reheated to the deformation temperature and then rolled by the method of step three, in which the rolling speed v of the rolling surface 21 of the core roll 20 is set3The rotation speed of the main roll 30 is controlled to be 13 to 20rad/min at 1.3 to 1.6mm/s, the second transition ring 12 continues to expand and the portion of the second transition ring not in contact with the rolling surface 21 of the core roll 20 continues to incline toward the non-rolling surface 22 of the core roll 20, and when the inclination angle alpha reaches the inclination angle alpha between the non-rolling surface 22 and the rolling surface 210At 100%, i.e. α ═ α0At this time, the portion of the second transition ring 12 not in contact with the rolling surface 21 of the core roll 20 completely covers the slope of the non-rolling surface 22, the final roll forming of the rectangular pre-rolled billet 10 is completed, and the finally roll-formed basin-shaped ring forged piece 13 with the inclination angle α is obtained, and the height of the basin-shaped ring forged piece 13 is equal to the height of the second transition ring 12, the height of the first transition ring 11, and the height h of the rectangular pre-rolled billet 100。
In order to ensure that the inclined plane part at the upper end of the basin-shaped ring forging 13 can be fully deformed and formed in the rolling process, the size between the rectangular pre-rolling billet 10 and the basin-shaped ring forging 13 needs to meet the following two conditions at the same time:
(1) D0＝(0.5～0.7)D
in the formula:
D0the outer diameter (mm) of the rectangular pre-rolled billet 10;
d, the outer diameter (mm) of the lower end face of the basin-shaped ring forging 13;
(2)
in the formula:
d0the internal diameter (mm) of the rectangular pre-rolled billet 10;
D0the outer diameter (mm) of the rectangular pre-rolled billet 10;
d is the inner diameter (mm) of the lower end face of the basin-shaped ring forging 13;
d, the outer diameter (mm) of the lower end face of the basin-shaped ring forging 13;
h0the height (mm) of the rectangular pre-rolled billet 10 or the basin-shaped ring forging 13;
h1the height (mm) of the cylindrical portion of the pot ring forging 13 rolled by the core roll 20.
Claims (2)
1. Ti2The roll forming method of the AlNb-based alloy basin-shaped ring forging is characterized by comprising the following steps of:
first, the prepared Ti2Heating AlNb-based alloy rectangular pre-rolled blank to a deformation temperature, then loading the AlNb-based alloy rectangular pre-rolled blank into a ring rolling mill, enabling the longitudinal section of the rectangular pre-rolled blank to be positioned in a rolling hole pattern formed by enclosing of a core roller, a main roller, an upper conical roller and a lower conical roller of the ring rolling mill, wherein the outer circular surface of the core roller consists of a cylindrical rolling surface and a truncated cone-shaped non-rolling surface, and the inclination angle between the non-rolling surface and the rolling surface is alpha0；
Second, starting the ring rolling mill, wherein the rolling surface of the core roller is v1Feeding a rolling rectangular pre-rolling blank to the direction of a main roller at a rolling speed of 0.4-0.7 mm/s, and controlling the rotating speed of the main roller at 10-15 rad/min, enlarging the hole from inside to outside in the part of the rectangular pre-rolling billet contacted with the rolling surface of the core roller under the action of rolling force, and inclining the part of the rectangular pre-rolling billet not contacted with the rolling surface of the core roller to the non-rolling surface of the core roller while drawing and enlarging the hole along with the contacted part, when the inclination angle alpha is alpha1To achieve an angle of inclination alpha between the non-rolled surface and the rolled surface030-40 percent of the strip thickness, finishing the first basin-shaped angle rolling of the rectangular pre-rolling blank to obtain the strip with the inclination angle alpha1The height of the first transition ring is equal to the height h of the rectangular pre-rolled blank0；
Thirdly, heating the first transition ring to the deformation temperature, and then rolling the first transition ring according to the method of the second step, wherein the rolling speed v of the rolling surface of the core roller in the third step2Controlling the rotation speed of the main roller to be 12-18 rad/min at 0.8-1.2 mm/s, continuously enlarging the hole of the first transition ring, continuously inclining the part of the first transition ring, which is not in contact with the rolling surface of the core roller, to the non-rolling surface of the core roller, and when the inclination angle alpha is formed2To achieve an angle of inclination alpha between the non-rolled surface and the rolled surface050% -60%, finishing the second basin-shaped angle rolling of the rectangular pre-rolling blank to obtain a strip with an inclination angle alpha2The height of the second transition ring is equal to the height of the first transition ring is equal to the height h of the rectangular pre-rolled blank0；
Fourthly, heating the second transition ring to the deformation temperature and then rolling the second transition ring according to the method of the second step, wherein the rolling speed v of the rolling surface of the core roller3Controlling the rotation speed of the main roller to be 13-20 rad/min at 1.3-1.6 mm/s, continuously enlarging the hole of the second transition ring, continuously inclining the part of the second transition ring, which is not in contact with the rolling surface of the core roller, to the non-rolling surface of the core roller, and when the inclination angle alpha reaches the inclination angle alpha between the non-rolling surface and the rolling surface0At 100%, i.e. α ═ α0And completely covering the non-contact part of the second transition ring and the rolling surface of the core roller on the inclined surface of the non-rolling surface to finish the final rolling forming of the rectangular pre-rolling blank to obtain a final-rolling formed basin-shaped ring forging with an inclination angle alpha, wherein the height of the basin-shaped ring forging is equal to the height of the second transition ring, the height of the first transition ring is equal to the height h of the rectangular pre-rolling blank0。
2. The Ti of claim 12The roll forming method of the AlNb-based alloy basin-shaped ring forging is characterized by comprising the following steps: the size between the rectangular pre-rolling blank and the basin-shaped ring forging simultaneously meets the following two conditions:
(1) D0＝(0.5～0.7)D
in the formula:
D0-the outer diameter of the rectangular pre-rolled billet, mm;
d, the outer diameter of the lower end face of the basin-shaped ring forging is mm;
(2)
in the formula:
d0-the internal diameter of the rectangular pre-rolled billet, mm;
D0-the outer diameter of the rectangular pre-rolled billet, mm;
d, the inner diameter of the lower end face of the basin-shaped ring forging is mm;
d, the outer diameter of the lower end face of the basin-shaped ring forging is mm;
h0-the height, mm, of the rectangular pre-rolled blank or the basin-shaped ring forging;
h1the height of the cylindrical part of the basin-shaped ring forging rolled by the core roller is mm.
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| CN202011058502.1A CN112170748A (en) | 2020-09-30 | 2020-09-30 | Ti2Rolling forming method of AlNb-based alloy basin-shaped ring forging |
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| CN202011058502.1A CN112170748A (en) | 2020-09-30 | 2020-09-30 | Ti2Rolling forming method of AlNb-based alloy basin-shaped ring forging |
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