CN114160653A - Cold spinning forming method for large-diameter titanium alloy cylindrical part - Google Patents

Cold spinning forming method for large-diameter titanium alloy cylindrical part Download PDF

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Publication number
CN114160653A
CN114160653A CN202111421906.7A CN202111421906A CN114160653A CN 114160653 A CN114160653 A CN 114160653A CN 202111421906 A CN202111421906 A CN 202111421906A CN 114160653 A CN114160653 A CN 114160653A
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spinning
blank
titanium alloy
forming method
alloy cylindrical
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CN202111421906.7A
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CN114160653B (en
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张乐
冯庆
沈楚
何秀玲
杨勃
苗东
李耀辉
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Xian Taijin Industrial Electrochemical Technology Co Ltd
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Xian Taijin Industrial Electrochemical Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The invention belongs to the technical field of plastic forming of titanium cylindrical parts, and relates to a cold spinning forming method of a large-diameter titanium alloy cylindrical part. The method adopts room temperature spinning, the blank, the core mold and the spinning wheel do not need preheating, and large spinning pressure and large feed ratio are adopted, so that crystal grains in the blank are fully crushed into smaller crystal grains; in order to avoid the gradual rise of the temperature of the surface of the blank in the spinning process, cooling liquid is used for forced cooling in the spinning process; the multi-pass spinning process is adopted, so that the crystal grains of the blank are distributed more uniformly; the vertical spinning machine is adopted for spinning, the core die is convenient to replace, and the cylindrical part is simple to assemble and disassemble. The invention can be used for spin forming of titanium alloy cylindrical parts with the outer diameter of more than 3m, the obtained cylindrical parts have fine crystal grains and uniform tissues, the grain size grade can reach grade 12 required by ASTM E112, and the use requirement of the titanium cylinder on the surface of the large-diameter high-end green foil cathode roller is met.

Description

Cold spinning forming method for large-diameter titanium alloy cylindrical part
Technical Field
The invention belongs to the technical field of plastic forming of titanium cylindrical parts, and relates to a cold spinning forming method of a large-diameter titanium alloy cylindrical part.
Background
Titanium alloys are widely used as various cylindrical parts in the fields of aviation, aerospace, ships, weapons and the like due to the characteristics of high specific strength, good corrosion resistance, excellent welding performance and the like. The spinning forming is a less-cutting and no-cutting processing technology which integrates the technological characteristics of forging, stretching, extruding, rolling and the like, and the forming technology has the advantages of high material utilization rate, good product performance and the like, and can be made into an integral seamless hollow revolving body part.
At present, hot spinning technology is mainly adopted for spinning titanium alloy, however, the grain size grade of parts obtained by hot spinning is smaller. In recent years, with the rapid development of the electrolytic copper foil industry, the localization of high-end lithium electrolytic copper foil is rapidly advanced, the grain size grade of a titanium alloy cathode roller serving as a core component of electrolytic copper foil equipment is required to be higher and higher, and the grain size grade of a titanium cylindrical part obtained by adopting a hot spinning technology is smaller, so that the production requirement of the high-end lithium electrolytic copper foil is difficult to meet. Therefore, how to obtain a titanium cylinder with high grain size grade by adjusting the spinning process is very important.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a cold spinning forming method of a large-diameter titanium alloy cylindrical part, the obtained cylindrical part has fine crystal grains and uniform structure, and the use requirement of a titanium cylinder on the surface of a large-diameter high-end green foil cathode roller can be met.
In order to achieve the purpose, the invention provides the following technical scheme:
the cold spinning forming method of the large-diameter titanium alloy cylindrical part sprays cooling liquid to a contact point of a spinning wheel and a blank by using a spray gun in the spinning process, and specifically comprises the following steps:
step 1, mounting a core mold on a workbench of a spinning machine;
step 2, starting the pneumatic jacking cylinder to return to a working position;
step 3, sleeving the blank on a core mold, and clamping the lower end of the blank in a groove of a pneumatic jacking cylinder;
step 4, starting spinning, wherein in the spinning process, the spinning wheel moves downwards, and the spray gun sprays cooling liquid against the contact point of the spinning wheel and the blank;
step 5, repeating the step 4 once every additional pass according to different spinning passes;
and 6, after spinning is finished, lifting the blank by the pneumatic jacking cylinder to perform demoulding, and completely demoulding the blank after the blank is lifted to a specified position to obtain the titanium alloy cylindrical part.
Further, the rotating speed of the core mold is 15-40 rad/min, the feeding ratio is 3-7 mm/rad, and the pressing amount of each pass is 4-8 mm.
Further, the outer diameter of the blank is not less than 3 m.
Further, the titanium alloy cylindrical piece has a grain size rating of 12 required by ASTM E112.
Furthermore, the spinning process is carried out at room temperature, the core die, the blank and the spinning rollers do not need to be preheated in advance, the number of the spinning rollers is two, and the spinning rollers are symmetrically distributed on the workbench of the spinning machine.
Optionally, the number of the spinning wheels is an even number more than 4, every two spinning wheels form a group, and each group of spinning wheels are symmetrically distributed on the workbench of the spinning machine; and the rotary wheels between the adjacent groups and positioned on the same side are distributed in a vertically staggered manner.
Further, the blank and the core mold are in transition fit, and the gap between the blank and the core mold is smaller than or equal to 0.8 mm.
Further, a layer of molybdenum disulfide oil agent or water-based graphite is coated on the surface of the core mold.
Furthermore, the top of mandrel is equipped with rings easy to assemble and dismantle.
Further, the material of the core mold is H13 hot work die steel, K403 high-temperature alloy or 4Cr5MoSiV 1.
Further, the material of the rotary wheel is H13 hot work die steel, W18Cr4V high-speed steel or 4Cr5MoSiV 1.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the spinning is carried out at room temperature, the blank, the core mold and the spinning wheel do not need to be preheated, the strength of the blank is high, the plasticity is poor, and the spinning pressure is high when the spinning wheel extrudes the surface of the blank; the contact pressure between the spinning wheel and the blank is very large by adopting large spinning pressure and large feed ratio, and the large pressure causes the crystal grains on the contact surface to be fully crushed, thereby obtaining fine crystal grains; in order to avoid the gradual rise of the temperature of the surface of the blank in the spinning process, cooling liquid is used for forced cooling in the spinning process; meanwhile, the multi-pass spinning process is adopted, so that the crystal grains of the blank are distributed more uniformly; the vertical spinning machine is adopted for spinning, the core die is convenient to replace, and the cylindrical part is simple to assemble and disassemble.
Drawings
FIG. 1 is a schematic structural view of a spin forming table provided in the present invention;
fig. 2 is a structural view of a large-diameter titanium alloy cylindrical spun piece provided by the present invention.
Wherein: 1. a hoisting ring; 2. a core mold; 3. a blank; 4. a spray gun; 5. rotating the wheel; 6. a pneumatic jacking cylinder; 7. spinning machine workstation.
Detailed Description
The exemplary embodiments will be described herein in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of methods consistent with certain aspects of the invention, as detailed in the appended claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
The embodiment provides a cold spinning forming method of a large-diameter titanium alloy cylindrical part, which specifically comprises the following steps:
step 1, installing and fixing a core die 2 on a workbench 7 of a spinning machine by a hoisting mode through a hoisting ring 1, coating a layer of molybdenum disulfide oiling agent on the outer surface of the core die 2 after the core die 2 is installed, wherein the core die 2 is made of H13 hot work die steel, and the diameter of the core die 2 is 2650 mm.
And 2, starting the pneumatic jacking cylinder 6 to return to the working position.
Step 3, sleeving the blank 3 on the core mold 2 in a hoisting mode, clamping the lower end of the blank 3 in a groove of the pneumatic jacking cylinder 6, enabling the blank 3 and the core mold 2 to be in transition fit, enabling the maximum gap between the blank 3 and the core mold 2 to be 0.6mm, enabling the blank 3 to be made of TA1, enabling the outer diameter to be 2770mm, enabling the wall thickness to be 60mm and enabling the height to be 1000 mm.
And 4, starting spinning, wherein in the spinning process, the spinning wheel 5 moves downwards, the spray gun 4 sprays cooling liquid against the contact point of the spinning wheel 5 and the blank 3, the material of the spinning wheel 5 is 4Cr5MoSiV1, and the rotating speed of the core mould 2 is 25 rad/min.
Step 5, adopting a 5-pass spinning process, and repeating the step 4 once every time one pass is added; wherein the pressing amount of the first pass is 8mm, the feeding amount is 75mm/min, and the feeding ratio is 3 mm/rad; the pressing amount of the second pass is 6.5mm, the feeding amount is 100mm/min, and the feeding ratio is 4 mm/rad; the pressing amount of the third pass is 6mm, the feeding amount is 125mm/min, and the feeding ratio is 5 mm/rad; the pressing amount of the fourth pass is 5.5mm, the feeding amount is 150mm/min, and the feeding ratio is 6 mm/rad; the pressing amount in the fifth pass is 4mm, the feeding amount is 125mm/min, and the feeding ratio is 7 mm/rad.
And 6, after spinning is finished, lifting the blank 3 by the pneumatic jacking cylinder 6 for demolding, completely demolding the blank 3 by adopting a hoisting mode after the blank 3 is lifted to a proper position, wherein the external diameter of the cylindrical part after spinning is 2710mm, the wall thickness is 30mm, and the grain size grade is 12 grade.
Example 2
The embodiment provides another cold spinning forming method of a large-diameter titanium alloy cylindrical part, which specifically comprises the following steps:
step 1, installing and fixing a core die 2 on a workbench 7 of a spinning machine by a hoisting mode through a hoisting ring 1, coating a layer of molybdenum disulfide oiling agent on the outer surface of the core die 2 after the core die 2 is installed, wherein the core die 2 is made of H13 hot work die steel, and the diameter of the core die 2 is 2650 mm.
And 2, starting the pneumatic jacking cylinder 6 to return to the working position.
Step 3, sleeving the blank 3 on the core mold 2 in a hoisting mode, clamping the lower end of the blank 3 in a groove of the pneumatic jacking cylinder 6, enabling the blank 3 and the core mold 2 to be in transition fit, enabling the maximum gap between the blank 3 and the core mold 2 to be 0.8mm, enabling the blank 3 to be made of TA1, enabling the outer diameter to be 2770mm, enabling the wall thickness to be 60mm and enabling the height to be 1000 mm.
And 4, starting spinning, wherein in the spinning process, the spinning wheel 5 moves downwards, the spray gun 4 sprays cooling liquid against the contact point of the spinning wheel 5 and the blank 3, the material of the spinning wheel 5 is 4Cr5MoSiV1, and the rotating speed of the core mould 2 is 15 rad/min.
Step 5, adopting a 5-pass spinning process, and repeating the step 4 once every time one pass is added; wherein the pressing amount of the first pass is 7.5mm, the feeding amount is 45mm/min, and the feeding ratio is 3 mm/rad; the pressing amount of the second pass is 7mm, the feeding amount is 60mm/min, and the feeding ratio is 4 mm/rad; the pressing amount of the third pass is 6mm, the feeding amount is 67.5mm/min, and the feeding ratio is 4.5 mm/rad; the pressing amount of the fourth pass is 5.5mm, the feeding amount is 75mm/min, and the feeding ratio is 5 mm/rad; the pressing amount of the fifth pass is 4mm, the feeding amount is 90mm/min, and the feeding ratio is 6 mm/rad.
And 6, after spinning is finished, lifting the blank 3 by the pneumatic jacking cylinder 6 for demolding, completely demolding the blank 3 by adopting a hoisting mode after the blank 3 is lifted to a proper position, wherein the external diameter of the cylindrical part after spinning is 2710mm, the wall thickness is 30mm, and the grain size grade is 12 grade.
Example 3
The embodiment provides another cold spinning forming method of a large-diameter titanium alloy cylindrical part, which specifically comprises the following steps:
step 1, installing and fixing a core die 2 on a workbench 7 of a spinning machine by a hoisting ring 1 in a hoisting mode, coating a layer of molybdenum disulfide oiling agent on the outer surface of the core die 2 after the core die 2 is installed, wherein the core die 2 is made of H13 hot work die steel, and the diameter of the core die 2 is 2950 mm.
And 2, starting the pneumatic jacking cylinder 6 to return to the working position.
Step 3, sleeving the blank 3 on the core mold 2 in a hoisting mode, clamping the lower end of the blank 3 in a groove of the pneumatic jacking cylinder 6, enabling the blank 3 and the core mold 2 to be in transition fit, enabling the maximum gap between the blank 3 and the core mold 2 to be 0.8mm, enabling the blank 3 to be made of TA1, enabling the outer diameter to be 3010mm, enabling the wall thickness to be 60mm and enabling the height to be 1000 mm.
And 4, starting spinning, wherein in the spinning process, the spinning wheel 5 moves downwards, the spray gun 4 sprays cooling liquid against the contact point of the spinning wheel 5 and the blank 3, the material of the spinning wheel 5 is 4Cr5MoSiV1, and the rotating speed of the core mould 2 is 30 rad/min.
Step 5, adopting a 5-pass spinning process, and repeating the step 4 once every time one pass is added; the pressing amount of the first pass is 7.5mm, the feeding amount is 90mm/min, and the feeding ratio is 3 mm/rad; the pressing amount of the second pass is 6.5mm, the feeding amount is 120mm/min, and the feeding ratio is 4 mm/rad; the pressing amount of the third pass is 6mm, the feeding amount is 150mm/min, and the feeding ratio is 5 mm/rad; the pressing amount of the fourth pass is 5.5mm, the feeding amount is 180mm/min, and the feeding ratio is 6 mm/rad; the pressing amount in the fifth pass was 4.5mm, the feed amount was 210mm/min, and the feed ratio was 7 mm/rad.
And 6, after spinning is finished, lifting the blank 3 by the pneumatic jacking cylinder 6 for demolding, and completely demolding the blank 3 by adopting a hoisting mode after the blank 3 is lifted to a proper position, wherein the external diameter of the cylindrical part after spinning is 3000mm, the wall thickness is 30mm, and the grain size grade is 12.
In conclusion, the cold spinning forming method provided by the invention can be used for spinning forming of a titanium alloy cylindrical part with the outer diameter of more than 3m, and the obtained cylindrical part has the characteristics of fine crystal grains and uniform structure; meanwhile, the grain size grade of the titanium alloy cylindrical part obtained by the method can reach 12 grades required by ASTM E112, and the use requirement of the titanium cylinder on the surface of the large-diameter high-end raw foil cathode roller is met.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. A cold spinning forming method of a large-diameter titanium alloy cylindrical part is characterized by comprising the following steps:
step 1, mounting a core die (2) on a workbench (7) of a spinning machine;
step 2, starting the pneumatic jacking cylinder (6) to return to a working position;
step 3, sleeving the blank (3) on the core mold (2) to enable the lower end of the blank (3) to be clamped in the groove of the pneumatic jacking cylinder (6);
step 4, starting spinning, wherein in the spinning process, the spinning wheel (5) moves downwards, and the spray gun (4) sprays cooling liquid against the contact point of the spinning wheel (5) and the blank (3);
step 5, repeating the step 4 once every additional pass according to different spinning passes;
and 6, finishing spinning, lifting the blank (3) by the pneumatic jacking cylinder (6) for demolding, and completely demolding the blank (3) after the blank (3) is lifted to a designated position to obtain the titanium alloy cylindrical part.
2. The cold spinning forming method of a large-diameter titanium alloy cylindrical part according to claim 1, wherein the rotation speed of the core die (2) is 15 to 40rad/min, the feed ratio is 3 to 7mm/rad, and the amount of pressing down per pass is 4 to 8 mm.
3. The cold spin forming method of a large-diameter titanium alloy cylindrical member according to claim 1, wherein an outer diameter of the blank (3) is not less than 3 m.
4. The cold spin forming method of a large diameter titanium alloy cylindrical member according to claim 1, wherein the titanium alloy cylindrical member has a grain size rating of 12 in accordance with ASTM E112.
5. The cold spinning forming method of the large-diameter titanium alloy cylindrical part according to claim 1, wherein the spinning process is performed at room temperature, and the number of the spinning rollers (5) is two and the spinning rollers are symmetrically distributed on the worktable (7) of the spinning machine.
6. The cold spin forming method of a large diameter titanium alloy cylindrical member according to claim 1, wherein the blank (3) and the core die (2) are transition fit, and a clearance therebetween is less than or equal to 0.8 mm.
7. The cold spin forming method of a large-diameter titanium alloy cylindrical member according to claim 1, wherein a layer of molybdenum disulfide oil solution or water-based graphite is coated on the surface of the core mold (2).
8. The cold spinning forming method of a large-diameter titanium alloy cylindrical member according to claim 1, wherein a lifting ring (1) which is easy to mount and dismount is provided at the top end of the core mold (2).
9. The cold spin forming method of a large diameter titanium alloy cylindrical member according to claim 1, wherein the material of the core mold (2) is H13 hot work die steel, K403 superalloy, or 4Cr5MoSiV 1.
10. The cold spin forming method of a large diameter titanium alloy cylindrical member according to claim 1, wherein the material of the spinning wheel (5) is H13 hot work die steel, W18Cr4V high speed steel, or 4Cr5MoSiV 1.
CN202111421906.7A 2021-11-26 2021-11-26 Cold spinning forming method for large-diameter titanium alloy cylindrical part Active CN114160653B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101579804A (en) * 2009-06-04 2009-11-18 航天材料及工艺研究所 Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line
CN102773323A (en) * 2012-07-31 2012-11-14 华南理工大学 Strong force rotary pressing molding method of nanocrystalline/superfine crystal carbon steel cylindrical piece
CN106391810A (en) * 2016-10-18 2017-02-15 华南理工大学 Spinning forming method for manufacturing magnetically soft alloy cylindrical part
CN106552852A (en) * 2016-12-02 2017-04-05 西安航天动力机械厂 A kind of reverse spinning processing method of Small Taper cylindrical member
CN108015149A (en) * 2017-12-07 2018-05-11 上海新力动力设备研究所 A kind of strong revolving shaping method of housing seamless pipe
CN110961515A (en) * 2019-11-29 2020-04-07 上海新力动力设备研究所 Titanium alloy thin-wall cylinder forming method
CN111266476A (en) * 2020-03-05 2020-06-12 南昌航空大学 Method for forming as-cast aluminum alloy cylindrical part
CN111822573A (en) * 2020-06-24 2020-10-27 江苏华阳管业股份有限公司 Alloy pipe spinning forming process based on ultralow temperature machining
CN213256671U (en) * 2020-09-21 2021-05-25 芜湖西诺普汽车零部件科技有限公司 Inner hub shovel rotary spinning die

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101579804A (en) * 2009-06-04 2009-11-18 航天材料及工艺研究所 Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line
CN102773323A (en) * 2012-07-31 2012-11-14 华南理工大学 Strong force rotary pressing molding method of nanocrystalline/superfine crystal carbon steel cylindrical piece
CN106391810A (en) * 2016-10-18 2017-02-15 华南理工大学 Spinning forming method for manufacturing magnetically soft alloy cylindrical part
CN106552852A (en) * 2016-12-02 2017-04-05 西安航天动力机械厂 A kind of reverse spinning processing method of Small Taper cylindrical member
CN108015149A (en) * 2017-12-07 2018-05-11 上海新力动力设备研究所 A kind of strong revolving shaping method of housing seamless pipe
CN110961515A (en) * 2019-11-29 2020-04-07 上海新力动力设备研究所 Titanium alloy thin-wall cylinder forming method
CN111266476A (en) * 2020-03-05 2020-06-12 南昌航空大学 Method for forming as-cast aluminum alloy cylindrical part
CN111822573A (en) * 2020-06-24 2020-10-27 江苏华阳管业股份有限公司 Alloy pipe spinning forming process based on ultralow temperature machining
CN213256671U (en) * 2020-09-21 2021-05-25 芜湖西诺普汽车零部件科技有限公司 Inner hub shovel rotary spinning die

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