CN109954758A - A kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body - Google Patents
A kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body Download PDFInfo
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- CN109954758A CN109954758A CN201711420830.XA CN201711420830A CN109954758A CN 109954758 A CN109954758 A CN 109954758A CN 201711420830 A CN201711420830 A CN 201711420830A CN 109954758 A CN109954758 A CN 109954758A
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- titanium alloy
- cylindrical member
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- swollen valve
- precision
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Arc Welding In General (AREA)
- Forging (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
The invention discloses a kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body, belong to cylindrical member forming technique field.Method of the invention is to cut titanium alloy plate according to the planar development size of cylinder, and the plate after cutting is rolled into cylindrical member using coiling welded technique；The cylindrical member of acquisition is placed on to the outside of the swollen valve of stress relaxation fixture for forming, then expansion core is fitted into swollen valve；Cylindrical member, swollen valve and expansion core after assembling is placed in Equipment for Heating Processing, heating carries out stress relaxation forming；Cool down after forming, obtains high-precision hyperboloid titanium alloy barrel body.By the way of expansion core and the forming of the stress relaxation of swollen valve, breach the forming thinking limitation of tubular construction part, successfully solves the technical problem that titanium alloy cylindrical part divides half form to be difficult to control product quality, control of product quality can be improved in this method, improve product stability, production cost is reduced, provides the process completely newly optimized for the production of titanium alloy cylindrical structural member, is suitable for cylinder forming technology.
Description
Technical field
The present invention relates to a kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body, belong to cylindrical member forming technique neck
Domain.
Background technique
Titanium alloy cylindrical part is generally existing and particularly important in guided missile, completes the more efficient mission to strike target.Cylinder
Important component of the shape structural member as body, structural behaviour and dimensional accuracy determine the flying quality of guided missile, so this
Kind high-precision, the high finished product rate forming technique of hyperbolicity titanium alloy barrel body are particularly important.High-speed guided missile is to structural behaviour
Stringent with dimension precision requirement, tradition divides half form method, and on the one hand cooperation required precision height is relatively difficult to guarantee this dimensional accuracy；Separately
On the one hand tradition forming needs to carry out multiple welding, it is more difficult to guarantee its required structural performance requirements.In high precision, hyperbolicity titanium alloy
Cylindrical member has splendid flying quality, thus in aerospace field using very extensive.Currently, this high precision titanium alloy cylinder
Mainly using a point half hot formed manufacturing process, being divided to half form is to go out two semi-cylindrical shaped parts by hot forming for the forming of shape part,
Again by alignment welding, cylindrical member is obtained.First, this method is in hot forming it is difficult to ensure that each of shaping a type face has
Higher consistency；Second, cutting semi-barrel shape part is also influenced by cutting accuracy after thermoforming；Third, welding each time all
There are welding quality control problems, and to sum up this method is due to mainly by double of part cooperation precision and multiple welding quality control
The influence of system, it is more difficult to reach superior product quality.Divide high to the cooperation required precision of two halves part in half thermo shaping method, increasing
The workload of repair, process-cycle are longer after having added cutting difficulty and having cut；Weld seam number is more, and level weld seam requirement is high, increases weldering
Difficulty is connect, using high-precision electron beam welding, increases processing cost.
Summary of the invention
To solve existing point of half hot formed manufacturing process, repair difficulty is big after dicing, and the period is long, and weld seam number is more, weldering
Technology problem at high cost is connect, the present invention provides a kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body, use
Technical solution it is as follows:
The purpose of the present invention is to provide a kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body, which is
It carries out in accordance with the following steps:
1) titanium alloy plate is cut according to the planar development size of cylinder, by the titanium alloy plate after cutting using coiling welded work
Skill is rolled into cylindrical member；
2) cylindrical member that step 1) obtains is placed on to the outside of the swollen valve (1) of stress relaxation fixture for forming, it then will be swollen
Core 2 is fitted into swollen valve 1, is cooperated intact；
3) it will be placed in Equipment for Heating Processing according to cylindrical member, swollen valve 1 and the expansion core 2 after step 2) assembling, by technological parameter
Heating carries out stress relaxation forming；
4) cool down after shaping, obtain high-precision hyperboloid titanium alloy barrel body.
Further, the coiling welded technique is to roll up the titanium alloy plate of cutting to cylindrical shape by edge rolling machine equipment, is beaten
The docking area to be welded of cylindrical member is ground, pickling area to be welded will be placed in argonaut welding with the cylindrical member after pickling by polishing
Argon arc welding, the cylindrical member after being welded are carried out on machine.
Further, the thermal expansion coefficient of the swollen valve 1 and the material of expansion core 2 is greater than the thermal expansion coefficient of titanium alloy.
Further, step 3) is will to be placed in heat treatment according to cylindrical member, swollen valve 1 and the expansion core 2 after step 2) assembling to set
In standby, the vacuum degree of Equipment for Heating Processing is then evacuated to 5 × 10-2Pa or more, then be warming up to the heating rate 3h of 250 DEG C/h
750 DEG C, 2h finally is kept the temperature at 750 DEG C.
Further, the step 4) cooling is to cool to room temperature with the furnace.
As shown in Fig. 2, swollen valve of the invention is the coefficient of expansion meter according to selected titanium alloy plate and swollen valve selected materials
Outer mold surface is divided valve to handle by the mold zoom factor calculated under forming temperature with the swollen valve outer mold surface in type face after being scaled
To swollen valve；Expansion core is to obtain expansion core according to shape dimensional fits in swollen valve.
Plate is rolled into cylindrical member using coiling welded method firstly, by the accurate blanking of analysis structural member progress by the present invention,
Cylindrical member is placed on the outside of the swollen valve of stress relaxation fixture for forming, expansion core is fitted into swollen valve, cooperates swollen valve and expansion core intact.
Due to selecting moulds of industrial equipment material thermal expansion coefficient to be greater than titanium alloy, so cylindrical member loads and unloads Shi Junyou certain interval, facilitate dress
It unloads.Fixture for forming is placed in Equipment for Heating Processing, setting heating temperature meets technological parameter, carries out stress relaxation forming.At
After shape, cool down by technological parameter, obtains structural behaviour and the satisfactory high precision titanium alloy cylinder of dimensional accuracy
Shape structural member.
The invention has the advantages that:
The present invention provides a kind of manufacturing process of high-precision hyperbolicity titanium alloy cylindrical structural member, and this method is inventor
For titanium alloy hot forming loading method to the affecting laws of material Deformation Flow, thermoforming temperatures to titanium alloy forming limit
Achievement after the case studies such as affecting laws, under the premise of comprehensively considering product quality and shape stability, by trying repeatedly
It tests, develops a kind of forming process that this titanium alloy cylindrical part high-precision, high stability production can be achieved, this method can
To improve control of product quality, product stability is improved, reduces production cost, is mentioned for the production of such titanium alloy cylindrical structural member
The process of completely new optimization is supplied.By the measurement to cylindrical member forming quality, parts size precision obtained by this method is found
Height, without residual stress, Product Status consistency are good.Comprehensively consider the factors such as dimensional accuracy, structural behaviour, shape stability, this
Inventive method has a good application prospect in high precision titanium alloy tubular construction part manufacture view.
The present invention proposes the manufacturing process of high-precision high-efficiency for a kind of high-precision, hyperbolicity titanium alloy barrel body structural member,
By the way of expansion core and the forming of the stress relaxation of swollen valve, the forming thinking limitation of tubular construction part is breached, successfully solves titanium
The technical problem that alloy cylindrical member divides half form to be difficult to control product quality, the forming for titanium alloy cylindrical structural member provide elder generation
Into process, it is great perspective.
The stress relaxation that the present invention uses shapes compared with conventional hot forming, and maximum difference resides in reduced weld seam number
Amount, thus reduce welding and the probability of defect occur, control of product quality ability is improved, yield rate is improved.This stress relaxation
Fixture for forming uses expansion core and swollen valve structure, is easier to load and unload compared with common orthopedic method.
After cylindrical member is coiling welded in the method for the present invention, part is not achieved most in the geomeries such as circularity, straightness of cylindrical member
Whole size requirement, it is using tooling thermal stress that cylindrical member is orthopedic to final size by stress relaxation forming, then pass through stress pine
The cooling that relaxes conveniently removes part.
By selecting moulds of industrial equipment material thermal expansion coefficient to be greater than titanium alloy in the present invention, when can cylindrical member be loaded and unloaded
There is certain interval, it is convenient for loading and unloading.
Detailed description of the invention
Fig. 1 is hyperbolicity titanium alloy cylindrical structural member.
Fig. 2 is stress relaxation fixture for forming schematic diagram；
(1, swollen valve；2, expansion core).
Fig. 3 is forming process schematic diagram；
(welding rear cylinder body is placed on outside swollen valve by a；Expansion core is fitted into swollen valve by b, is cooperated with swollen valve, and heating is answered
Power relaxation forming；C, cylindrical member and tooling exploded pictorial).
Specific embodiment
The present invention will be further described combined with specific embodiments below, but the present invention should not be limited by the examples.
Embodiment 1:
Illustrate the present embodiment in conjunction with Fig. 1-3, present embodiments provides a kind of forming of high-precision hyperboloid titanium alloy barrel body
Method, the manufacturing process carry out in accordance with the following steps:
1) titanium alloy plate is cut according to the planar development size of cylinder, the titanium alloy plate of cutting is set by furling plate round machine
Standby volume is to cylindrical shape, the docking area to be welded for cylindrical member of polishing, pickling area to be welded, will be by polishing and the cylindrical member after pickling
It is placed on automatic argon arc welder and carries out argon arc welding, the cylindrical member after being welded；
2) cylindrical member that step 1) obtains is placed on to the outside of the swollen valve (1) of stress relaxation fixture for forming, it then will be swollen
Core 2 is fitted into swollen valve 1, is cooperated intact；
It 3) is that will be placed in Equipment for Heating Processing according to cylindrical member, swollen valve 1 and the expansion core 2 after step 2) assembling, it then will be hot
The vacuum degree of processing equipment is evacuated to 5 × 10-2Pa or more, then 750 DEG C of (stress relaxations are warming up to the heating rate 3h of 250 DEG C/h
Forming), finally 2h is kept the temperature at 750 DEG C；
4) cylindrical member that step 3) obtains is cooled to the furnace room temperature after shaping, and obtains high-precision hyperboloid titanium alloy
Cylinder.
The thermal expansion coefficient of swollen valve 1 and the material of expansion core 2 is greater than the thermal expansion coefficient of titanium alloy in the present embodiment.
The thermal expansion coefficient of swollen valve 1 and the material of expansion core 2 is greater than titanium alloy in the present embodiment, can cylindrical member be loaded and unloaded
Shi Jun has certain interval, convenient for loading and unloading.
As shown in Fig. 2, the swollen valve in the present embodiment is the expansion system according to selected titanium alloy plate and swollen valve selected materials
Number calculates the mold zoom factor under forming temperature, and according to cylinder model, mating mold zoom factor, gained scales rear cylinder body
Shape, obtains swollen valve outer mold surface, and outer mold surface is divided valve to handle to obtain swollen valve, preferably 8 valves by inside processing through-hole processing；Expansion core
It is to obtain expansion core outer mold surface according to shape dimensional fits in swollen valve, expansion core is more swollen, and certain surplus, inside processing through hole are stayed in valve upside
Reason.
Referring to attached drawing 3 in the present embodiment, the accurate blanking of plate is obtained into titanium alloy cylindrical part blank by being welded technique；
Stress relaxation fixture for forming is split into opening as shown in Fig. 2；Cylindrical member blank is placed on the outside of the swollen valve of tooling, such as attached drawing 3
(a) shown in；Expansion core is fitted into swollen valve, cooperates expansion core and swollen valve intact, as shown in attached drawing 3 (b)；The tooling of blank will be installed
Entirety is placed in heating equipment, and setting heating temperature meets technological parameter, and heating carries out stress relaxation forming；Forming terminates
Afterwards, cool down by technique requirement, obtain high-precision, hyperbolicity titanium alloy cylindrical structural member.
The effect that method can obtain to illustrate the invention, it is double to the high-precision prepared according to present invention method
The type face paste of curved surface titanium alloy barrel body is right, the process-cycle, weld seam quantity, residual stress, processing stability and manufacturing cost into
Measurement is gone, while using the performance of the cylindrical member of tradition point half thermo shaping method preparation as compareing, comparison result such as 1 institute of table
Show.
1 comparison result of table
As it can be seen from table 1 forming method provided by the present invention is type face paste is right, the process-cycle, weld seam quantity, residual
Residue stress, processing stability and manufacturing cost etc. are substantially better than existing method, furthermore divide half thermo shaping method system with tradition
Standby cylindrical member is compared, and forming method sharpest edges provided by the present invention are that the cylindrical member process-cycle is short, reduces weld seam
Quantity improves processing stability, substantially reduces difficulty of processing.
Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the invention, any to be familiar with this
The people of technology can do various changes and modification, therefore protection of the invention without departing from the spirit and scope of the present invention
Range should subject to the definition of the claims.
Claims (5)
1. a kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body, which is characterized in that the manufacturing process is according to as follows
What step carried out:
1) titanium alloy plate is cut according to the planar development size of cylinder, by the titanium alloy plate after cutting using coiling welded technique volume
At cylindrical member；
2) cylindrical member that step 1) obtains is placed on to the outside of the swollen valve (1) of stress relaxation fixture for forming, then by expansion core (2)
It is fitted into swollen valve (1), cooperates intact；
3) it will be placed in Equipment for Heating Processing according to cylindrical member, swollen valve (1) and the expansion core (2) after step 2) assembling, by technological parameter
Heating carries out stress relaxation forming；
4) cool down after shaping, obtain high-precision hyperboloid titanium alloy barrel body.
2. the method according to claim 1, wherein the coiling welded technique is to pass through the titanium alloy plate of cutting
Edge rolling machine equipment is rolled up to cylindrical shape, the docking area to be welded for cylindrical member of polishing, pickling area to be welded, will be after polishing and pickling
Cylindrical member be placed on automatic argon arc welder and carry out argon arc welding, the cylindrical member after being welded.
3. the method according to claim 1, wherein the thermal expansion system of the swollen valve (1) and the material of expansion core (2)
Number is greater than the thermal expansion coefficient of titanium alloy.
4. the method according to claim 1, wherein step 3) be by according to step 2) assembling after cylindrical member,
Swollen valve (1) and expansion core (2) are placed in Equipment for Heating Processing, and the vacuum degree of Equipment for Heating Processing is then evacuated to 5 × 10-2Pa or more, then
750 DEG C are warming up to the heating rate 3h of 250 DEG C/h, finally keeps the temperature 2h at 750 DEG C.
5. the method according to claim 1, wherein the step 4) cooling is to cool to room temperature with the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711420830.XA CN109954758A (en) | 2017-12-25 | 2017-12-25 | A kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body |
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| CN201711420830.XA CN109954758A (en) | 2017-12-25 | 2017-12-25 | A kind of manufacturing process of high-precision hyperboloid titanium alloy barrel body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642947A (en) * | 2020-12-14 | 2021-04-13 | 航天海鹰(哈尔滨)钛业有限公司 | Hot-pressing bulging tool and method for hot-pressing bulging thin-wall cylindrical part with closing-up structure |
| CN113477744A (en) * | 2021-06-29 | 2021-10-08 | 宜兴市鑫煜科技有限公司 | Deep drawing forming production process of slat sliding rail sleeve |
| CN113770647A (en) * | 2021-08-12 | 2021-12-10 | 上海航天精密机械研究所 | Vacuum thermoforming method for titanium alloy variable-curve bus spray pipe |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642947A (en) * | 2020-12-14 | 2021-04-13 | 航天海鹰(哈尔滨)钛业有限公司 | Hot-pressing bulging tool and method for hot-pressing bulging thin-wall cylindrical part with closing-up structure |
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| CN113477744A (en) * | 2021-06-29 | 2021-10-08 | 宜兴市鑫煜科技有限公司 | Deep drawing forming production process of slat sliding rail sleeve |
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| CN113770647A (en) * | 2021-08-12 | 2021-12-10 | 上海航天精密机械研究所 | Vacuum thermoforming method for titanium alloy variable-curve bus spray pipe |
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