CN111644468A - Variable-path continuous extrusion rolling forming device and method for titanium alloy tube blank - Google Patents
Variable-path continuous extrusion rolling forming device and method for titanium alloy tube blank Download PDFInfo
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- CN111644468A CN111644468A CN202010546480.7A CN202010546480A CN111644468A CN 111644468 A CN111644468 A CN 111644468A CN 202010546480 A CN202010546480 A CN 202010546480A CN 111644468 A CN111644468 A CN 111644468A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 97
- 238000001125 extrusion Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005096 rolling process Methods 0.000 title claims abstract description 15
- 230000035515 penetration Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 abstract description 3
- 238000010899 nucleation Methods 0.000 abstract description 3
- 230000006911 nucleation Effects 0.000 abstract description 3
- 238000001953 recrystallisation Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/08—Enlarging tube diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention provides a titanium alloy pipe blank variable-path continuous extrusion forming device and method. The barrel-shaped roller group is provided with barrel-shaped rollers which are arranged at equal angles; the diameter of the section of the cylindrical roller gradually changes from the middle to two sides of the cylindrical roller; the roll stack has a plurality of cylindrical rolls arranged at equal angles. The top is used for penetrating and expanding the titanium alloy tube blank, and extruding the titanium alloy tube blank through the barrel-shaped roller assembly to complete extrusion and expansion; and the roll group is matched with the ejector rod to roll and reduce the diameter of the extruded and expanded titanium alloy tube blank. The invention realizes the gradual accumulation of deformation energy storage of the titanium alloy tube blank by repeated variable path loading combining extrusion expanding and continuous rolling reducing, provides more nucleation sites for dynamic recrystallization, promotes the refinement of crystal grains and improves the comprehensive performance.
Description
Technical Field
The invention relates to the technical field of titanium alloy efficient short-flow forming processes, in particular to a device and a method for forming a titanium alloy tube blank by continuous extrusion and rolling in a variable path mode.
Background
Titanium alloy is replacing traditional steel materials by virtue of characteristics such as high specific strength, corrosion resistance, high temperature resistance, creep resistance, processability and the like, and is receiving wide attention and research and application, for example, the proportion of titanium alloy in aircraft structural members is often taken as an important basis for measuring the aircraft production and manufacturing level of a country in the aircraft manufacturing industry.
For the preparation process of the titanium alloy seamless pipe, the traditional manufacturing process mainly comprises two processes, namely drilling extrusion and cross rolling perforation. The drilling and extruding process needs to drill holes in a forged titanium alloy casting blank, then extrude the titanium alloy casting blank on an extruder with a larger tonnage, and roll the titanium alloy casting blank together with the pipe to prepare pipes with different specifications. The cross rolling perforation process needs to perforate a forged titanium alloy casting blank, and then the titanium alloy casting blank is rolled by a pipe to prepare a corresponding pipe.
Although the titanium alloy pipe preparation process is basically mature, the titanium alloy pipe is high in production difficulty, complex in equipment, tedious and long in process, low in yield and high in material loss and intangible loss in each stage, the time and economic cost utilization rate in the titanium alloy pipe production and manufacturing process is low due to the factors, and the application of the titanium alloy pipe in the relevant fields of national defense and military industry, oceans and aviation is severely limited.
Disclosure of Invention
The invention aims to provide a variable-path continuous extrusion forming device and an extrusion forming method for a titanium alloy tube blank, which can reduce the preparation and processing cost and the processing period of a titanium alloy tube, and improve the microstructure and the macroscopic mechanical property of the tube by the large deformation of a variable path.
The titanium alloy pipe blank variable-path continuous extrusion forming device comprises a sleeve assembly, a barrel-shaped roller set and a roller set which are sequentially arranged along the horizontal direction;
the sleeve assembly, barrel roll set and roll set are coaxially arranged;
the inner cavity of the sleeve assembly in the longitudinal direction forms a first passage through which the titanium alloy tube blank passes;
the central axis positions of the barrel-shaped roll set and the roll set are provided with a top head ejector rod, and the top head ejector rod is provided with a top head facing the sleeve assembly and an ejector rod extending from the top head to the roll set direction;
the barrel-shaped roll set is provided with barrel-shaped rolls which are arranged at equal angles, the center positions of the plurality of barrel-shaped rolls form a second channel allowing the titanium alloy pipe blank to pass through, and the top is positioned in the second channel; the diameter of the section of the cylindrical roller gradually changes from the middle to two sides of the cylindrical roller;
the roll group is provided with a plurality of cylindrical rolls which are arranged at equal angles, and the center positions of the cylindrical rolls form a third channel for allowing the titanium alloy pipe blank to pass through;
the continuous path formed by the first channel, the second channel and the third channel forms an extrusion rolling path of the titanium alloy tube blank;
the jacking head is arranged to perform pipe penetration and diameter expansion on the titanium alloy pipe blank entering the second channel from the first channel, and extrude the titanium alloy pipe blank through the barrel-shaped roller set to complete extrusion and diameter expansion;
and the roll group is arranged to be matched with the ejector rod and is used for rolling and reducing the extruded and expanded titanium alloy pipe blank entering the third channel from the second channel.
Preferably, the plug is at least partially beyond the location of the maximum diameter of the barrel roll, so that the titanium alloy tube blank delivered from the sleeve assembly is removed from the plug and then from the barrel roll set after being expanded by tube penetration.
Preferably, the titanium alloy tube blank variable-path continuous extrusion forming device further comprises a hydraulic assembly arranged at the inlet position of the first passage and used for pushing the titanium alloy tube blank to the third passage.
Preferably, the titanium alloy tube blank variable-path continuous extrusion forming device further comprises a first motor, and the first motor is used for driving the barrel-shaped rollers of the barrel-shaped roller group to rotate.
Preferably, the output end of the first motor drives a sleeve assembly to rotate through gear transmission, the sleeve assembly is fixedly connected with the rotating discs, and two ends of the cylindrical roller are mounted on the two rotating discs through roller shafts.
Preferably, the titanium alloy tube blank variable-path continuous extrusion forming device further comprises a second motor which is used for driving the cylindrical rollers of the roller group to rotate.
The titanium alloy tube blank variable-path continuous extrusion forming method comprises the following steps:
pushing the titanium alloy tube blank from the first channel into the second channel through the hydraulic assembly;
in the second channel, a plug is matched with a barrel-shaped roller set for extrusion and diameter expansion, and a variable-section annular hole shape I is formed on the section of the titanium alloy tube blank;
pushing the titanium alloy pipe blank through the hydraulic assembly so that the channel enters a third channel, wherein the titanium alloy pipe blank is separated from the jacking head and then separated from the barrel-shaped roll group;
in the third channel, the titanium alloy tube blank after being extruded and expanded is rolled and reduced in diameter through the matching of the roller group and the ejector rod to form a variable-section annular hole shape II
Compared with the prior art, the technical scheme of the invention has the following remarkable beneficial effects:
(1) by repeated variable path loading combining extrusion expanding and continuous rolling reducing, the gradual accumulation of deformation energy storage of the titanium alloy tube blank is realized, more nucleation sites are provided for dynamic recrystallization, the refinement of crystal grains is promoted, the comprehensive performance of the product is improved, and good coordination of forming and formability is realized;
(2) the proportion of redundant processing is greatly reduced, and the preparation processing cost and period of the titanium alloy pipe are reduced;
(3) the production and manufacturing cost of equipment is reduced, the material loss and the loss are greatly reduced, the titanium alloy pipe preparation with high efficiency and short flow is realized on the premise of good coordination of quality guarantee/quantity guarantee and forming/forming performance, and the economic benefit is improved.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the presently disclosed subject matter.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a variable-path continuous extrusion forming device for titanium alloy tube blanks according to the present invention.
FIG. 2 is a schematic diagram of the variable-path continuous extrusion forming process of the titanium alloy tube blank.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any one implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.
With reference to fig. 1 and 2, the variable-path continuous extrusion forming device for the titanium alloy tube blank according to the exemplary embodiment of the present invention is designed to realize efficient short-flow short-forming of the titanium alloy tube, so as to greatly reduce the manufacturing and processing cost and processing cycle of the titanium alloy tube, and simultaneously, greatly improve the microstructure and macroscopic mechanical properties of the tube by variable-path large-deformation, and realize coordination of quality guarantee/retention, forming/forming and low-cost short-flow manufacturing.
The titanium alloy tube blank variable-path continuous extrusion forming device shown in fig. 1 comprises a sleeve assembly 10, a barrel-shaped roll set 20 and a roll set 30 which are arranged in sequence along the horizontal direction. The sleeve assembly 10, the barrel-shaped roll set 20 and the roll set 30 are coaxially arranged in a concentric mode to guarantee concentricity and consistency of the titanium alloy tube blank in the processes of extrusion expanding and rolling reducing.
In FIGS. 1-2, a titanium alloy tube blank is indicated at 100.
The center axis positions of the barrel roll group 20 and the roll group 30 are provided with a top bar 40, and the top bar 40 has a top 41 facing the sleeve assembly and a top bar 42 extending from the top in the roll group direction. Alternatively, the general cross-sectional diameter is larger than the cross-sectional diameter of the carrier rod 42.
The plug ejector 40 is preferably made of an alloy material having high hardness. The top 41 and the top rod 42 may be integrally formed, or they may be detachably fixed together.
Referring to fig. 2, the lengthwise interior cavity of the sleeve assembly 10 defines a first passageway through which the titanium alloy tube stock passes. As shown in fig. 1, a hydraulic assembly 11, such as a hydraulic cylinder assembly, is further provided at the inlet of the first passage to push the titanium alloy tube blank from the first passage to the third passage by means of a push rod.
The barrel roll set 20 has barrel rolls 21 arranged at equal angles, and the center positions of the plurality of barrel rolls form a second passage for allowing the titanium alloy tube stock to pass through, as shown in fig. 2, and a plug 41 is positioned in the second passage.
As shown in fig. 1, the cylindrical roll 21 is provided at both ends thereof with turntables 23, respectively, and the cylindrical roll 21 is mounted between the turntables 23 via roll shafts 22.
In an alternative embodiment, the barrel roll stack 20 is driven by a first motor 50. For example, the first motor 50 outputs torque through a speed reducer 51, the output end of the speed reducer 51 is connected to the sleeve assembly 10 through a bevel gear assembly 52, the sleeve assembly 10 is driven to rotate through gear transmission, and the sleeve assembly is connected with the rotating disc 23, so that the rotation of the barrel roll set is driven.
Wherein the turntable 22 is connected to the frame of the device by means of bearings.
The barrel roll set 20 in the example shown in fig. 1 and 2 comprises 3 barrel rolls, which are of the same structural design and have a cross-sectional diameter that tends to taper from the middle to the sides of the barrel rolls.
In other embodiments, the barrel roll stack 20 can also be designed with more suitable barrel rolls.
Therefore, in the process of extrusion and expanding, the first motor outputs torque through the speed reducer and transmits the torque to the turntable through bevel gear connection, the turntable drives the barrel-shaped roller group to rotate synchronously, and the barrel-shaped roller group can rotate freely along the roller shaft under the deformation resistance.
In connection with the illustration, the roll set 30 has a plurality of cylindrical rolls 31 arranged at equal angles, and the center positions of the plurality of cylindrical rolls 31 constitute a third passage for allowing the titanium alloy hollow shell to pass through.
With reference to fig. 1 and 2, the continuous path formed by the first channel, the second channel and the third channel forms an extrusion path of the titanium alloy tube blank.
The plug 41 is arranged to perform pipe penetration and diameter expansion on the titanium alloy pipe blank entering the second passage from the first passage, and extrude the titanium alloy pipe blank through the barrel-shaped roller set to complete extrusion and diameter expansion; the roll group 30 is matched with the ejector rod 42 to roll and reduce the diameter of the extruded and expanded titanium alloy pipe blank entering the third channel from the second channel.
Preferably, the plug 41 is at least partially beyond the location of the maximum diameter of the barrel roll so that the titanium alloy tube blank delivered from the sleeve assembly is removed from the plug and then from the barrel roll set after being expanded by the tube penetration.
As shown in fig. 1, the titanium alloy tube blank variable-path continuous extrusion forming device preferably further comprises a second motor 32 which is arranged for driving the cylindrical rollers of the roller group to rotate.
Therefore, the titanium alloy tube blank 100 is placed in the sleeve assembly from the inlet side of the sleeve assembly, the titanium alloy tube blank is pushed to move towards the right end under hydraulic drive, and the barrel-shaped roller and the top are matched to form a variable-section annular hole shape I. The large-deformation continuous extrusion expanding of the continuous casting tube blank is realized under the combined action of the barrel-shaped roll group and the top.
After the continuous casting tube blank 9 is pushed to move towards the right end, the titanium alloy tube blank 100 which is rolled and expanded by the variable cross-section annular hole I is separated from the top 41 and then separated from the barrel-shaped roll set 42, so that the diameter of the continuous casting tube blank 9 after being extruded and expanded is fixed. Then, in the process of rolling and reducing the diameter, the roll group 30 is driven to rotate, the titanium alloy pipe blank 100 subjected to extrusion and diameter expansion enters a variable cross-section annular hole shape II formed by matching the roll group and the ejector rod under the hydraulic drive, and the titanium alloy pipe blank 100 is meshed and bitten under the combined action of the roll group and the ejector rod to realize secondary variable path rolling and diameter reduction.
Therefore, through the repeated variable path loading combining continuous extrusion expanding and continuous rolling reducing, the gradual accumulation of deformation energy storage of the titanium alloy tube blank is realized, more nucleation sites are provided for dynamic recrystallization, the crystal grain refining is promoted, the comprehensive performance of the product is improved, the coordination of forming and forming is realized, the preparation and processing cost and period of the titanium alloy tube are reduced, and the preparation of the titanium alloy tube with short flow and high efficiency is realized.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (9)
1. A titanium alloy pipe blank variable-path continuous extrusion forming device is characterized by comprising a sleeve assembly, a barrel-shaped roll set and a roll set which are sequentially arranged along the horizontal direction;
the sleeve assembly, barrel roll set and roll set are coaxially arranged;
the inner cavity of the sleeve assembly in the longitudinal direction forms a first passage through which the titanium alloy tube blank passes;
the central axis positions of the barrel-shaped roll set and the roll set are provided with a top head ejector rod, and the top head ejector rod is provided with a top head facing the sleeve assembly and an ejector rod extending from the top head to the roll set direction;
the barrel-shaped roll set is provided with barrel-shaped rolls which are arranged at equal angles, the center positions of the plurality of barrel-shaped rolls form a second channel allowing the titanium alloy pipe blank to pass through, and the top is positioned in the second channel; the diameter of the section of the cylindrical roller gradually changes from the middle to two sides of the cylindrical roller;
the roll group is provided with a plurality of cylindrical rolls which are arranged at equal angles, and the center positions of the cylindrical rolls form a third channel for allowing the titanium alloy pipe blank to pass through;
the continuous path formed by the first channel, the second channel and the third channel forms an extrusion rolling path of the titanium alloy tube blank;
the jacking head is arranged to perform pipe penetration and diameter expansion on the titanium alloy pipe blank entering the second channel from the first channel, and extrude the titanium alloy pipe blank through the barrel-shaped roller set to complete extrusion and diameter expansion;
and the roll group is arranged to be matched with the ejector rod and is used for rolling and reducing the extruded and expanded titanium alloy pipe blank entering the third channel from the second channel.
2. A titanium alloy tube billet variable path continuous extrusion forming apparatus according to claim 1, wherein the plug at least partially passes over the position of the maximum diameter of the barrel roll, so that the titanium alloy tube billet delivered from the sleeve assembly is firstly separated from the plug and then separated from the barrel roll group after being subjected to tube penetration and diameter expansion.
3. The titanium alloy tube blank variable-path continuous extrusion forming device according to claim 1, further comprising a hydraulic assembly provided at an inlet position of the first passage for pushing the titanium alloy tube blank toward the third passage.
4. The titanium alloy tube blank variable-path continuous extrusion forming device as claimed in claim 1, wherein the titanium alloy tube blank variable-path continuous extrusion forming device further comprises a first motor, and the first motor is used for driving the barrel-shaped rollers of the barrel-shaped roller group to rotate.
5. The titanium alloy tube blank variable-path continuous extrusion forming device as claimed in claim 4, wherein the output end of the first motor drives a sleeve assembly to rotate through gear transmission, the sleeve assembly is fixedly connected with the rotating discs, and two ends of the cylindrical roller are mounted on the two rotating discs through roller shafts.
6. A titanium alloy tube blank variable-path continuous extrusion forming device according to claim 1, characterized in that the titanium alloy tube blank variable-path continuous extrusion forming device further comprises a second motor arranged to drive the cylindrical rollers of the roller group to rotate.
7. A titanium alloy tube blank variable-path continuous extrusion forming apparatus according to claim 1, wherein the plug and the mandrel are integrally formed.
8. A titanium alloy tube blank variable-path continuous extrusion forming apparatus as claimed in claim 1, wherein said plug and said mandrel are detachably connected to form one body.
9. A titanium alloy tube blank variable-path continuous extrusion forming method of a titanium alloy tube blank variable-path continuous extrusion forming device according to any one of claims 1 to 8, characterized by comprising the steps of:
pushing the titanium alloy tube blank from the first channel into the second channel through the hydraulic assembly;
in the second channel, a plug is matched with a barrel-shaped roller set for extrusion and diameter expansion, and a variable-section annular hole shape I is formed on the section of the titanium alloy tube blank;
pushing the titanium alloy pipe blank through the hydraulic assembly so that the channel enters a third channel, wherein the titanium alloy pipe blank is separated from the jacking head and then separated from the barrel-shaped roll group;
and in the third channel, the titanium alloy tube blank after being extruded and expanded is rolled and reduced in diameter through the matching of the roller group and the ejector rod, so that a variable-section annular hole shape II is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546480.7A CN111644468A (en) | 2020-06-15 | 2020-06-15 | Variable-path continuous extrusion rolling forming device and method for titanium alloy tube blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546480.7A CN111644468A (en) | 2020-06-15 | 2020-06-15 | Variable-path continuous extrusion rolling forming device and method for titanium alloy tube blank |
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| CN111644468A true CN111644468A (en) | 2020-09-11 |
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| CN202010546480.7A Pending CN111644468A (en) | 2020-06-15 | 2020-06-15 | Variable-path continuous extrusion rolling forming device and method for titanium alloy tube blank |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01233009A (en) * | 1988-03-10 | 1989-09-18 | Kobe Steel Ltd | Equipment for rolling taper rod |
| CN2128570Y (en) * | 1992-07-28 | 1993-03-24 | 王秀和 | Planetary rolling mill |
| JPH1128504A (en) * | 1997-07-08 | 1999-02-02 | Sumitomo Metal Ind Ltd | Manufacture of metal stock having round shape in cross section and its manufacturing device |
| CN109158422A (en) * | 2018-08-06 | 2019-01-08 | 宁波大学 | A kind of forming device for high-speed rail hole-bored axle from end to end |
| CN110883124A (en) * | 2019-11-13 | 2020-03-17 | 燕山大学 | Extrusion-rolling integrated forming method of titanium alloy continuous casting tube blank |
-
2020
- 2020-06-15 CN CN202010546480.7A patent/CN111644468A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01233009A (en) * | 1988-03-10 | 1989-09-18 | Kobe Steel Ltd | Equipment for rolling taper rod |
| CN2128570Y (en) * | 1992-07-28 | 1993-03-24 | 王秀和 | Planetary rolling mill |
| JPH1128504A (en) * | 1997-07-08 | 1999-02-02 | Sumitomo Metal Ind Ltd | Manufacture of metal stock having round shape in cross section and its manufacturing device |
| CN109158422A (en) * | 2018-08-06 | 2019-01-08 | 宁波大学 | A kind of forming device for high-speed rail hole-bored axle from end to end |
| CN110883124A (en) * | 2019-11-13 | 2020-03-17 | 燕山大学 | Extrusion-rolling integrated forming method of titanium alloy continuous casting tube blank |
Non-Patent Citations (1)
| Title |
|---|
| 成海涛等: "《热轧无缝钢管实用技术》", 30 September 2019, 四川科学技术出版社 * |
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Application publication date: 20200911 |