CN113059325B - Precision forming method for large-size variable-curvature thin-wall storage tank diaphragm - Google Patents
Precision forming method for large-size variable-curvature thin-wall storage tank diaphragm Download PDFInfo
- Publication number
- CN113059325B CN113059325B CN202110348063.6A CN202110348063A CN113059325B CN 113059325 B CN113059325 B CN 113059325B CN 202110348063 A CN202110348063 A CN 202110348063A CN 113059325 B CN113059325 B CN 113059325B
- Authority
- CN
- China
- Prior art keywords
- spherical surface
- diaphragm
- semi
- finished
- spinning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The invention discloses a method for precisely forming a large-size variable-curvature thin-wall storage tank diaphragm, which comprises the following steps of: a circular plate-shaped blank is spun into a hemispherical shell with a flange on the end face, a plane reference of the end face is machined after heat treatment, an outer spherical surface reference is machined according to the plane reference, an inner spherical surface, a flange outer spherical surface and a maximum outer circular surface are machined according to the outer spherical surface reference, and the outer spherical surface and the flange inner spherical surface are machined according to the plane reference. Compared with the traditional punch forming, the invention adopts spin forming to greatly save raw materials, can carry out forming processing by using thinner blanks, successfully solves the problems of thickness control and clamping of large-size variable-curvature thin-wall parts by means of designing and manufacturing special tool fixtures, adopting a vacuum chuck for adsorption and the like, and effectively prevents the deformation problem during processing of the thin-wall parts by precisely matching spherical tools with the inner and outer spherical surfaces of the parts.
Description
Technical Field
The invention relates to the field of machine manufacturing, in particular to a processing technology for precisely forming a large-size variable-curvature thin-wall storage tank membrane.
Background
In 2018, the launching activity in the field of global space transport is very active, more than 100 times of launching records are carried out for the first time, and 114 launching tasks are executed in total. At the satellite demand end, fourteen five are the Chinese satellite launching outbreak period, and medium and large liquid rockets are the best choice.
The attitude and orbit control propulsion system plays an important role in various spacecrafts, namely, the stability of the orbit and the attitude of the spacecraft is maintained. The tank is one of the most important parts in the power system, and the manufacturing and processing quality of the tank directly influences the service performance of the whole propulsion system. With the rapid development of aerospace technology, the on-orbit working time of spacecrafts such as satellites and the like is required to be prolonged, so that the liquid fuel in the spacecrafts is greatly increased. The prior art mainly adopts a bag type storage box, but the compatibility of a rubber bag and a propellant cannot ensure the long-term storage of the propellant. As a novel storage tank, the metal diaphragm storage tank has good corrosion resistance and can be stored for a long time, and the rigid diaphragm is tightly attached to the liquid level under the extrusion action of gas, so that the shaking of a propellant is eliminated.
The present foreign advanced storage box technology can make the attitude and orbit control power system meet the requirement of one-time filling for long-term storage for 15 years, and greatly improves the reliability of the on-orbit flight of the spacecraft. However, the development requirement of the attitude and orbit control power system cannot be met due to the restriction of the design and manufacturing technology of the metal diaphragm storage box, particularly the diaphragm, in China, and the technology needs to be broken through urgently.
In order to meet the urgent need of weight reduction of aerospace products, the tank material is gradually changed from the traditional stainless steel material to an aluminum alloy and titanium alloy (including industrial pure titanium) material, while the titanium alloy (including industrial pure titanium) is more and more concerned due to higher specific strength and good high temperature resistance, and the titanium alloy (including industrial pure titanium) is most suitable for the tank with internal pressure as the main design working condition. The quality of the formed and manufactured storage tank diaphragm is directly related to the success of the overturning test of the diaphragm, and further related to the success of the manufacturing of the storage tank, the storage tank diaphragm belongs to a typical large-size variable-curvature thin-wall component, and the processing difficulty of the storage tank diaphragm is extremely high due to the fact that the thickness is thin and gradually changed, the precision requirement is high, the deformation is easy to occur in the processing process, the size precision is difficult to guarantee, and the temperature is required to be controlled in the spinning forming and machining processes. It is known from the search of relevant literature data at home and abroad that at present, most of storage tanks and diaphragm materials are made of aluminum alloy, and most of patent documents are mainly used for processing upper and lower shells of storage tanks, for example, patent application No. CN111203689A is used for manufacturing the upper and lower shells of storage tanks, the material is made of aluminum alloy, the wall thickness is 3.9mm, the material is uniform, the material is formed by multiple stamping and forming of thick plates of raw materials, and the method not only needs more raw materials to be consumed, has extremely low efficiency, but also is easy to generate a work hardening phenomenon by multiple stamping and stretching forming and is easy to crack. For the forming of the large-size variable-curvature thin-wall storage tank diaphragm, the diaphragm is made of pure titanium, the thickness of the diaphragm is gradually changed from 1.8mm to about 1mm, the forming processing difficulty of the variable-curvature spherical workpiece with uneven thickness is far greater than the manufacturing difficulty of an upper shell and a lower shell which are even in thickness and relatively thick, vibration lines, deformation and clamping deformation are easily generated during the gradual thinning in the processing process, even cracking can be easily caused, meanwhile, the material is brittle and further cracked, and the forming, the measurement, the clamping and the like are difficult to realize by adopting the traditional method.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method solves the difficult problem of the forming processing technique of the large-size variable-curvature thin-wall storage tank diaphragm, breaks through the technical bottlenecks of integral precise forming, low cost and engineering application of the large-size complex variable-curvature thin-wall structural member, and overcomes the difficult points of forming, measuring and clamping which are difficult to realize by the common method.
The technical scheme of the invention is as follows:
a large-size variable-curvature thin-wall storage tank diaphragm precision forming method comprises the following steps: a circular plate-shaped blank is spun into a hemispherical shell with a flanging on the end surface, a plane reference of the end surface is machined after heat treatment, an outer spherical surface reference is machined according to the plane reference, an inner spherical surface, a flanging outer spherical surface and a maximum outer circular surface are machined according to the outer spherical surface reference, and the outer spherical surface and an inner spherical surface of a flanging R7 are machined according to the plane reference.
The method comprises the steps of cutting a circular platy blank by laser, and processing the surface of the blank by milling before spinning. According to the pre-calculated blank size, CO with the wavelength of 10.6 mu m is adopted 2 The laser is used for cutting, high-purity argon is used as auxiliary gas to finish the blanking of the spinning blank, the cut blank is milled to remove burrs, surface scratches, micro defects seen by naked eyes and the like, and the surface smoothness of the blank is ensured to meet the spinning requirement of industrial pure titanium.
And heating the blank during spinning, controlling the heating temperature to be below 200 ℃, mounting the blank on a spinning die to rotate, enabling the two spinning wheels to form an inclination angle of 45 degrees with the blank to be close to the front face for spinning, and sleeving a hemispherical semi-finished blank obtained by spinning on a flanging die for flanging and spinning to obtain a diaphragm semi-finished product. The purpose of the heating is to increase the elongation, but to prevent the blank from becoming brittle by hydrogen or oxygen uptake.
The heat treatment is to clamp the semi-finished product of the diaphragm between a heat treatment female die and a heat treatment male die, and a vacuum stress relief annealing process is adopted in a vacuum furnace, wherein the annealing temperature is 500-550 ℃, and the annealing time is 30-60 min. The heat treatment is mainly to eliminate stress, recover crystal grains, improve elongation and prevent larger deformation and crack during machining.
The plane reference processing is to use metal adhesive to bond the semi-finished diaphragm product with the tool, and the flanging part of the semi-finished diaphragm product is processed to be used as the plane reference. The outer spherical surface and the inner spherical surface of the flanging R7 are machined by taking the flanging part at the bottom of the semi-finished diaphragm product as a plane machining reference, the plane reference machining has the difficulties of difficult clamping and easy deformation, the machining precision and roundness of the subsequent semi-finished diaphragm product are greatly influenced if the reference machining is not accurate, the semi-finished diaphragm product and a tool are bonded by adopting a metal adhesive, the semi-finished diaphragm product and the tool are fixed without external force, the deformation caused by conventional clamping and fastening during the machining of the reference surface of the semi-finished diaphragm product is reduced, and the precision of the semi-finished diaphragm product is ensured.
And processing the spherical outside surface by taking the flanging part of the semi-finished membrane as a plane reference, placing the plane reference surface of the semi-finished membrane on a platform, and pressing the flanging part to perform turning processing on the spherical outside surface.
And carrying out diagonal symmetrical uniform pressure along at least 6 points of the circumference of the flanging part to compact the semi-finished product of the diaphragm, carrying out rough turning on the outer spherical surface, loosening the flanging part for 26-48 hours after the rough turning is finished, and then compacting the flanging part to finish turning the outer spherical surface after the stress is fully released. And loosening the pressure plate once or several times during test, fully releasing the machining stress, and then, tightly pressing and machining.
The outer spherical surface is used as a positioning reference to process the inner spherical surface, the flanging outer spherical surface and the maximum outer circular surface, the outer spherical surface is tightly attached to an inner cavity of a female die tool, after leveling and fixing, a special thickness gauge is used for measuring the thickness of each girdle of the semi-finished diaphragm product with different thickness requirements, according to measured data, under the premise that the machining allowance of about 0.5mm is reserved for finish machining, rough turning is adopted for processing, the thickness is measured once every rough turning, and the machining allowance of about 0.5mm is reserved for finish machining. And after rough turning is finished, finish turning is carried out, and the thickness is required to be measured once after finish turning is finished, so that the thickness of each ring belt with different thickness meets the requirement of drawing dimensional accuracy until the dimensional accuracy meets the requirement of the drawing.
The inner spherical surface of the diaphragm semi-finished product with the processed inner spherical surface is tightly attached to an outer cavity of the male die tool, the outer spherical surface and the inner spherical surface of the flanging R7 are processed by taking the flanging part as a plane reference, and the inner spherical surface and the flanging outer spherical surface are respectively taken as thickness references.
And fixing the outer spherical surface or the inner spherical surface of the semi-finished membrane in a spherical female die tool or a spherical male die tool in a vacuum adsorption mode. In order to prevent the diaphragm from being processed and scrapped after the diaphragm is loosened on the tool due to poor fit between the diaphragm and the tool due to vacuum decompression in the processing process, a 72-hour pressure maintaining test needs to be carried out before processing.
The beneficial effects of the invention are:
(1) Compared with the traditional punch forming, the invention adopts the spinning forming, so that the raw materials can be greatly saved, the forming processing can be carried out by using a thinner blank, the forming efficiency is high, the semi-finished product of the diaphragm can be obtained by spinning for 1 to 2 passes, and the cracking caused by work hardening is not easy to generate because the number of spinning passes is less; the spinning blank with the thickness more than 5 times is generally needed in the stamping process, the efficiency is extremely low after the multiple stamping and forming processes are carried out, and the multiple stamping and stretching processes are easy to produce the work hardening phenomenon and are easy to crack.
(2) The invention successfully solves the difficult problems of thickness control and clamping of large-size variable-curvature thin-wall parts by adopting the means of special thickness gauges, special tool fixtures for design and manufacture, adsorption by adopting a vacuum chuck and the like, and effectively prevents the deformation problem in the processing of the thin-wall parts by precisely matching the spherical tool with the inner and outer spherical surfaces of the parts.
(3) The invention breaks through the technical bottlenecks of integral precision forming, low cost and engineering application of large-scale complex thin-wall structural members by researching the key process of forming and processing the large-scale variable-curvature thin-wall member storage tank diaphragm, solves the difficult problem of forming and processing technology, masters the key technology of manufacturing the storage tank diaphragm and ensures the successful product development. The roundness of the storage tank membrane can reach 0.1mm, the spherical profile can reach 0.2mm, the tensile strength sigma b is not lower than 310MPa, and the elongation is not less than 30%.
Drawings
FIG. 1 is a schematic diagram of a reservoir diaphragm configuration.
FIG. 2 is a schematic view of semi-spherical spinning of a blank.
FIG. 3 is a schematic drawing of blank flange spinning.
FIG. 4 is a schematic view of the heat treatment of the semi-finished film.
FIG. 5 is a schematic plan view of a diaphragm blank.
Fig. 6 is a schematic reference surface processing diagram of the diaphragm semi-finished product outer spherical surface.
FIG. 7 is a schematic diagram of rough finishing of the inner spherical surface of the diaphragm semi-finished product.
FIG. 8 is a schematic diagram of rough finishing of the outer spherical surface of the diaphragm semi-finished product.
1-storage box diaphragm 2-spinning headstock 3-mandrel 4-screw 5-spinning die 6-1-right-handed wheel 6-2-left-handed wheel 7-1-right-handed wheel base 7-2-left-handed wheel base 8-blank 9-tail top 10-spinning machine tailstock 11-semi-finished blank 12-flanging die 13-heat treatment female die 14-heat treatment male die 15-diaphragm semi-finished product 16-hanging ring 17-hanging rod 18-reinforcing rib 19-reinforcing rib 20-screw 21-datum plane to be processed 22-metal adhesive 23-tooling 24-lathe platform 25-bolt 26-pressing plate 27-female die tooling 28-vacuum suction disc 29-sealing adhesive tape 30-male die tooling 25
Detailed Description
Examples
The maximum diameter of the large-size variable-curvature thin-wall storage tank diaphragm is
The roundness is 0.1mm, the wall thickness is gradually changed from 1.8mm to about 1mm, the requirement on the size precision of the storage tank diaphragm is high, the forming processing difficulty is extremely high, particularly, the used material is pure titanium, the strength is low, the deformation is easy to occur in the forming processing, the titanium absorbs hydrogen from 250 ℃ and absorbs oxygen from 400 ℃, so that the industrial pure titanium is easy to be polluted by impurities to become brittle in the processing and forming, the storage tank diaphragm has a complex structure, particularly the curvature of a flanging part is large, the hot forming is needed in the forming processing, and the forming processing difficulty is further improved; the application aims to adopt a special thickness gauge to measure the thickness and design and manufacture a special tool clamp to carry out spinning forming, the roundness reaches 0.1mm, the spherical profile can reach 0.2mm, and the tensile strength sigma is b Not less than 310MPa and elongation not less than 30%.
1. Laser cutting: cutting by adopting a CO2 laser with the wavelength of 10.6 mu m according to the pre-calculated blank size, and finishing the blanking of the spinning blank by adopting high-purity argon as auxiliary gas;
2. milling: milling the cut blank to remove burrs, surface scratches, micro defects seen by naked eyes and the like, and ensuring the surface smoothness of the blank so as to meet the spinning requirement of industrial pure titanium;
3. spinning and forming: the cutting spinning in the powerful spinning mode is adopted, not only the shape of the blank is changed, but also the thickness of the blank is obviously changed, the front hemispherical spinning forming is firstly carried out by utilizing a spinning die, and then the back flanging spinning forming is carried out by utilizing a flanging die, referring to the attached drawings 2 and 3, during the spinning, the spinning die 5 is firstly arranged on a spinning mandrel 3 through a screw 4, the spinning mandrel 3 is arranged on a spinning headstock 2, then a tail top 9 is used for propping the blank 8 on the spinning die 5, the tail top 9 is arranged on a tail seat 10 of the spinning machine, under the driving action of the spinning headstock 2, the blank 8 rotates at the rotating speed of 20rpm, when the blank 8 rotates, the blank 8 is heated by adopting flame, an infrared thermometer is used for measuring the temperature of a blank 8 while heating, when the blank is heated to a certain temperature, the heating temperature is controlled to be below 200 ℃, then a left spinning wheel 6-2 arranged on a left spinning wheel base 7-2 and a right spinning wheel 6-1 arranged on a right spinning wheel base form a 45-degree inclination angle with the blank 8 to be close to the blank 8, the front spinning is carried out at the rotating speed of 100rpm, the required blank shape is spun, a semi-finished blank 11 is obtained, the front spinning is finished, a tail top 9 is loosened, a flanging die 12 is sleeved on the semi-finished blank 11, then the left spinning wheel 6-1 and the right spinning wheel 6-2 are changed into a small-diameter one-point spinning wheel, and the semi-finished blank 11 is flanged and spun from the back side, so that a diaphragm semi-finished product 15 is obtained.
4. And (3) heat treatment: referring to fig. 4, the semi-finished diaphragm 15 is clamped between the heat treatment female die 13 and the heat treatment male die 14, and the heat treatment female die 13 and the heat treatment male die 14 are connected by screws 20 so as to clamp the semi-finished diaphragm 15. In order to enhance the rigidity of the heat-treatment punch 14, a rib 18 and a rib 19 are provided. In order to facilitate the hoisting of the heat treatment die, a hanger rod 17 and a hanging ring 16 are arranged between the upper parts of the heat treatment female die 13 and the heat treatment male die 14. In order to eliminate the stress of the semi-finished membrane product 15 and facilitate subsequent mechanical finish machining, a vacuum stress relief annealing process is adopted in a vacuum furnace, the annealing temperature is 500-550 ℃, and the annealing time is 30-60 min.
5. Processing a plane reference: the outer spherical surface is machined by taking the flanging part at the bottom of the diaphragm semi-finished product as a plane machining reference, the difficulty of machining the plane reference is difficult to clamp and deform, the machining precision and roundness of a subsequent diaphragm semi-finished product are greatly affected if the reference machining is inaccurate, see the attached drawing 5, the outer spherical surface of the diaphragm semi-finished product 15 is fixed on a tool 23 by adopting a metal adhesive 22, the diaphragm semi-finished product and the tool are not fixed by using external force, the deformation generated by conventional clamping and fastening during machining the diaphragm semi-finished product reference surface is reduced, the precision of the diaphragm semi-finished product is ensured, and after the clamping is firm, the two end surfaces of the reference surface 21 to be machined of the diaphragm semi-finished product 15 are subjected to mechanical finish turning, and the two end levels are ensured.
6. Processing an outer spherical surface reference surface: the outer spherical surface is used as a reference to process the inner spherical surface, the difficulty of processing the reference surface of the outer spherical surface is how to control the deformation of the round bottom part of the semi-finished membrane in the processing, the measure for solving is to adopt a pressure plate on a lathe platform to compress along at least 6 point positions of the circumference, to compress by diagonally symmetrical uniform pressure, to perform rough turning processing first and then to perform finish turning processing, to loosen the pressure plate for one or more times in each trial turning, to fully release the processing stress and then to compress and process: referring to the attached drawing 6, the processed plane reference surface of the semi-finished diaphragm 15 is placed on a lathe platform 24, the turnup parts at two ends of the semi-finished diaphragm 15 are pressed tightly by a pressing plate 26, the pressing plate 26 is connected with the lathe platform 24 through a bolt 25, the semi-finished diaphragm 15 is pressed tightly by the pressing plate 26 along at least 6 points of the circumference by using the pressure symmetrically and uniformly, the rough turning is firstly carried out on the outer spherical surface, the cutting depth generally exceeds 0.1, the pressing plate is loosened for 26 to 48 hours after the rough turning is finished, the semi-finished diaphragm 15 is pressed tightly by the pressing plate 26 after the stress is fully released, the finish turning is carried out, the cutting depth generally does not exceed 0.1, one thickness measurement is carried out by a special thickness gauge every rough turning or finish turning until the outer spherical reference surface of the semi-finished diaphragm 15 meets the requirement of the dimensional accuracy of the inner cavity of the female die tooling 27,
7. rough and fine turning processing of the inner spherical surface, the flanging outer spherical surface and the maximum outer circular surface: the external spherical surface is used as a positioning reference, and the requirement on the size is met
The spherical surface, the flanging spherical surface and
the maximum excircle part is subjected to rough and finish turning, and the processing difficulty is that the wall thickness is gradually reduced in the turning process to generate vibration lines and deformationAnd deformation caused by clamping, and the processing quality is difficult to ensure by adopting the conventional processing method. According to the solution of the application, referring to fig. 7, the outer spherical surface of the diaphragm semi-finished product 15 is tightly attached to the inner cavity of the female die tooling 27, and the outer spherical surface of the diaphragm semi-finished product 15 is adsorbed by a vacuum chuck 28 through a small hole of the female die tooling 27, so that the outer spherical surface of the diaphragm semi-finished product 15 is completely attached to the inner cavity of the female die tooling 27; in order to prevent the semi-finished membrane 15 from generating vacuum decompression during processing to cause poor bonding, a sealing adhesive tape 29 is used for sealing, and a 72-hour pressure maintaining test is required before rough processing. Before rough turning, a special thickness gauge is used for measuring the thickness of each girdle with different thickness requirements of the diaphragm semi-finished product 15, according to measured data, on the premise of ensuring that the machining allowance of about 0.5mm is reserved for fine machining, rough turning is adopted, according to the number of allowance, the cutting depth with more allowance is a little larger, the cutting depth with less allowance is a little smaller (the maximum cutting depth is generally larger than 0.1, and the specific condition is determined according to the number of allowance), the thickness is measured once every rough turning until the machining allowance of about 0.5 is reserved for fine machining. And after rough turning is finished, finish turning is carried out, the cutting depth of finish turning is generally not more than 0.1, the thickness is required to be measured once after finish turning is finished, so that the thickness of each annular belt with different thickness meets the requirement of drawing dimensional accuracy, and the finish turning is carried out for about 5 times until the dimensional accuracy meets the requirement of the drawing.
8. Rough and finish machining of the outer spherical surface and the inner spherical surface of the turned edge R7: referring to fig. 8, the inner spherical surface of the diaphragm semi-finished product 15 with the processed inner spherical surface is tightly attached to the outer cavity of the male die tool 30, and the vacuum chuck 28 is used for adsorbing the inner spherical surface of the diaphragm semi-finished product 15 through the small hole of the male die tool 30, so as to ensure that the inner spherical surface of the diaphragm semi-finished product 15 is completely attached to the outer cavity of the male die tool 30. The processing method is similar to the step 7.
Claims (6)
1. A large-size variable-curvature thin-wall storage tank diaphragm precise forming method is characterized by comprising the following steps: a circular plate-shaped blank is spun into a hemispherical shell with a flange on the end face, the blank is heated during spinning, a spinning die is used for performing front hemispherical spinning forming, then a flange die is used for performing reverse flange spinning forming to obtain a diaphragm semi-finished product, the diaphragm semi-finished product is subjected to heat treatment and then is processed with a plane reference of the end face, an outer spherical surface reference is processed with the plane reference, an inner spherical surface, a flange outer spherical surface and a maximum outer spherical surface are processed with the outer spherical surface reference, and the outer spherical surface and the flange inner spherical surface are processed with the plane reference;
the plane reference processing is to adopt metal adhesive to bond the semi-finished diaphragm product with the tool, and the flanging part of the semi-finished diaphragm product is processed to be used as a plane reference; processing the outer spherical surface and the flanged inner spherical surface by taking the flanged part at the bottom of the semi-finished diaphragm product as a plane reference, placing the plane reference surface of the semi-finished diaphragm product on a platform, and pressing the flanged part to perform turning processing on the outer spherical surface; carrying out diagonal symmetrical uniform pressure along at least 6 points of the circumference of the flanging part to compact the semi-finished product of the diaphragm, carrying out rough turning on the outer spherical surface, loosening the flanging part for 26-48 hours after the rough turning is finished, and then compacting the flanging part to finish turning the outer spherical surface after the stress is fully released; processing an inner spherical surface, a flanging outer spherical surface and a maximum outer circular surface by taking an outer spherical surface as a positioning reference, tightly attaching the outer spherical surface to an inner cavity of a female die tool, leveling and fixing, then measuring the thickness of each annular band of a diaphragm semi-finished product with different thickness by using a thickness gauge, according to the measured data, on the premise of ensuring that the machining allowance of 0.5mm is reserved for finish machining, adopting rough turning for processing, measuring the thickness once every rough turning until the machining allowance of 0.5 is reserved for finish machining; and after rough turning is finished, finish turning is carried out, and the thickness is required to be measured once after finish turning is finished, so that the thickness of each ring belt with different thickness meets the requirement of drawing dimensional accuracy until the dimensional accuracy meets the requirement of the drawing.
2. The precision forming method of the large-size variable-curvature thin-wall storage tank membrane as claimed in claim 1, wherein the method comprises the following steps: the method comprises the steps of cutting a circular platy blank by laser, and processing the surface of the blank by milling before spinning.
3. The precision forming method of the large-size variable-curvature thin-wall storage tank membrane as claimed in claim 2, wherein: controlling the heating temperature below 200 ℃, installing the blank on a spinning die to rotate, enabling two spinning wheels to form an inclination angle of 45 degrees with the blank to be close to the front face for spinning, sleeving a hemispherical semi-finished blank obtained by spinning on a flanging die for flanging and spinning to obtain a diaphragm semi-finished product.
4. The method for precisely forming the large-size variable-curvature thin-wall tank membrane according to claim 3, wherein the method comprises the following steps: the heat treatment is to clamp the semi-finished product of the membrane between a heat treatment female die and a heat treatment male die, and a vacuum stress relief annealing process is adopted in a vacuum furnace, wherein the annealing temperature is 500-550 ℃, and the annealing time is 30-60 min.
5. The precision forming method of the large-size variable-curvature thin-wall storage tank membrane as claimed in claim 4, wherein the method comprises the following steps: the inner spherical surface of the diaphragm semi-finished product with the processed inner spherical surface is tightly attached to an outer cavity of the male die tool, the outer spherical surface and the flanged inner spherical surface are processed by taking the flanged part as a plane reference, and the inner spherical surface is used as a thickness reference.
6. The method for precisely forming the large-size variable-curvature thin-wall tank membrane according to claim 5, wherein the method comprises the following steps: and fixing the outer spherical surface or the inner spherical surface of the semi-finished membrane in a vacuum adsorption mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348063.6A CN113059325B (en) | 2021-03-31 | 2021-03-31 | Precision forming method for large-size variable-curvature thin-wall storage tank diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348063.6A CN113059325B (en) | 2021-03-31 | 2021-03-31 | Precision forming method for large-size variable-curvature thin-wall storage tank diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113059325A CN113059325A (en) | 2021-07-02 |
| CN113059325B true CN113059325B (en) | 2023-01-20 |
Family
ID=76564801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110348063.6A Active CN113059325B (en) | 2021-03-31 | 2021-03-31 | Precision forming method for large-size variable-curvature thin-wall storage tank diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113059325B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114178800B (en) * | 2021-12-31 | 2023-02-28 | 湖北三江航天红阳机电有限公司 | Titanium alloy thin-wall hemisphere processing method |
| CN114799001B (en) * | 2022-03-30 | 2024-07-16 | 西安航天发动机有限公司 | Thermal processing method for forming hemispherical blank of large-size storage tank by adopting single-action hydraulic press |
| CN115890163B (en) * | 2022-12-26 | 2024-04-30 | 江西洪都航空工业集团有限责任公司 | Manufacturing process of large-curvature full-profile air inlet channel wallboard |
| CN115889826B (en) * | 2023-01-30 | 2023-08-04 | 蓝箭航天空间科技股份有限公司 | Rocket storage tank ellipsoidal bottom ring shape processing method |
| CN118321851B (en) * | 2024-06-12 | 2024-10-08 | 苏州伍玥航空科技有限公司 | Coiled metal thin-wall part and manufacturing method thereof |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730189A (en) * | 2005-09-12 | 2006-02-08 | 哈尔滨工业大学 | High precision spinning forming method for thin wall closing head with radius-thickness ratio less than three per mille |
| CN101092015A (en) * | 2007-08-09 | 2007-12-26 | 航天材料及工艺研究所 | Method for manufacturing large size, thin walled cap seal head made from TC4 titanium alloy with high precision |
| 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 |
| CN101890939A (en) * | 2009-05-19 | 2010-11-24 | 上海市嘉定区南翔小学 | Bicycle wheel cleaner |
| CN103437913A (en) * | 2013-07-25 | 2013-12-11 | 上海空间推进研究所 | Metal diaphragm storage box made of carbon-fiber composite materials and manufacturing method thereof |
| CN104607519A (en) * | 2014-11-28 | 2015-05-13 | 航天材料及工艺研究所 | Forming method for aluminum alloy storage box hemispherical shell |
| CN104785621A (en) * | 2015-04-16 | 2015-07-22 | 华中科技大学 | Stretch-forming and electromagnetic combining incremental forming method and device of large thin-wall part |
| CN105107917A (en) * | 2015-08-04 | 2015-12-02 | 航天材料及工艺研究所 | Storage tank hemispherical shell forming method for improving mechanical performance |
| CN106363067A (en) * | 2015-07-20 | 2017-02-01 | 上海航天设备制造总厂 | Overall shaping device for box bottom of spacecraft fuel storage box and shaping method for same |
| CN106424287A (en) * | 2016-12-22 | 2017-02-22 | 中南大学 | Stepwise precise spin-forming process method for large thin-wall dome |
| CN107570972A (en) * | 2017-09-22 | 2018-01-12 | 航天材料及工艺研究所 | The manufacturing process of large-scale high mode spheroid shape face Aluminum alloys tank Loadings On Hemispherical Shell |
| CN107984175A (en) * | 2017-12-08 | 2018-05-04 | 中国航天科技集团公司长征机械厂 | A kind of processing method of ultra-thin titanium alloy spherical parts |
| CN108555543A (en) * | 2018-05-11 | 2018-09-21 | 航天材料及工艺研究所 | A kind of manufacturing process of Aluminum alloys tank Loadings On Hemispherical Shell |
| CN108705102A (en) * | 2018-06-20 | 2018-10-26 | 湖北三江航天红阳机电有限公司 | A kind of vaulted thin-wall part machining method |
| CN109482700A (en) * | 2018-11-19 | 2019-03-19 | 湖北三江航天红阳机电有限公司 | A kind of titanium alloy hemisphere rotary press modelling method and forming frock |
| CN208840919U (en) * | 2018-09-29 | 2019-05-10 | 沈阳明日航材设备技术有限公司 | A kind of ball accessory turning fixture of large thin-wall half |
| CN110666044A (en) * | 2019-11-20 | 2020-01-10 | 四川航天长征装备制造有限公司 | Storage tank bottom convex hole die |
| CN111203689A (en) * | 2020-01-15 | 2020-05-29 | 贵州航天朝阳科技有限责任公司 | Machining process for precision forming of hemispheroid of large thin-wall storage tank |
| CN111922168A (en) * | 2020-08-07 | 2020-11-13 | 贵州航天朝阳科技有限责任公司 | Precision forming method for large thin-wall storage box shell |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040079522A1 (en) * | 1995-11-13 | 2004-04-29 | Roger Paulman | Folded, bent and re-expanded heat exchanger tube and assemblies |
| JP3418368B2 (en) * | 2000-06-16 | 2003-06-23 | 株式会社青山製作所 | Spool valve and method of manufacturing the same |
| CN102626848B (en) * | 2012-03-31 | 2014-05-14 | 湖北三江航天江北机械工程有限公司 | Processing method of flexible nozzle thin-wall dual-spherical reinforcing part and device thereof |
| CN103322048A (en) * | 2013-07-09 | 2013-09-25 | 浙江双飞无油轴承股份有限公司 | Bimetal liner with flanged flange and manufacturing method of bimetal liner |
| CN106808148A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | Pump for door of bus cylinder sleeve process flow |
| CN105344790B (en) * | 2015-12-15 | 2017-07-25 | 北京航星机器制造有限公司 | Aluminium alloy thin-walled dome head integral forming method |
| CN108637602B (en) * | 2018-05-11 | 2020-10-23 | 航天材料及工艺研究所 | Forming method of hemispherical shell of large-size thin-wall aluminum alloy storage tank |
-
2021
- 2021-03-31 CN CN202110348063.6A patent/CN113059325B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730189A (en) * | 2005-09-12 | 2006-02-08 | 哈尔滨工业大学 | High precision spinning forming method for thin wall closing head with radius-thickness ratio less than three per mille |
| CN101092015A (en) * | 2007-08-09 | 2007-12-26 | 航天材料及工艺研究所 | Method for manufacturing large size, thin walled cap seal head made from TC4 titanium alloy with high precision |
| CN101890939A (en) * | 2009-05-19 | 2010-11-24 | 上海市嘉定区南翔小学 | Bicycle wheel cleaner |
| 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 |
| CN103437913A (en) * | 2013-07-25 | 2013-12-11 | 上海空间推进研究所 | Metal diaphragm storage box made of carbon-fiber composite materials and manufacturing method thereof |
| CN104607519A (en) * | 2014-11-28 | 2015-05-13 | 航天材料及工艺研究所 | Forming method for aluminum alloy storage box hemispherical shell |
| CN104785621A (en) * | 2015-04-16 | 2015-07-22 | 华中科技大学 | Stretch-forming and electromagnetic combining incremental forming method and device of large thin-wall part |
| CN106363067A (en) * | 2015-07-20 | 2017-02-01 | 上海航天设备制造总厂 | Overall shaping device for box bottom of spacecraft fuel storage box and shaping method for same |
| CN105107917A (en) * | 2015-08-04 | 2015-12-02 | 航天材料及工艺研究所 | Storage tank hemispherical shell forming method for improving mechanical performance |
| CN106424287A (en) * | 2016-12-22 | 2017-02-22 | 中南大学 | Stepwise precise spin-forming process method for large thin-wall dome |
| CN107570972A (en) * | 2017-09-22 | 2018-01-12 | 航天材料及工艺研究所 | The manufacturing process of large-scale high mode spheroid shape face Aluminum alloys tank Loadings On Hemispherical Shell |
| CN107984175A (en) * | 2017-12-08 | 2018-05-04 | 中国航天科技集团公司长征机械厂 | A kind of processing method of ultra-thin titanium alloy spherical parts |
| CN108555543A (en) * | 2018-05-11 | 2018-09-21 | 航天材料及工艺研究所 | A kind of manufacturing process of Aluminum alloys tank Loadings On Hemispherical Shell |
| CN108705102A (en) * | 2018-06-20 | 2018-10-26 | 湖北三江航天红阳机电有限公司 | A kind of vaulted thin-wall part machining method |
| CN208840919U (en) * | 2018-09-29 | 2019-05-10 | 沈阳明日航材设备技术有限公司 | A kind of ball accessory turning fixture of large thin-wall half |
| CN109482700A (en) * | 2018-11-19 | 2019-03-19 | 湖北三江航天红阳机电有限公司 | A kind of titanium alloy hemisphere rotary press modelling method and forming frock |
| CN110666044A (en) * | 2019-11-20 | 2020-01-10 | 四川航天长征装备制造有限公司 | Storage tank bottom convex hole die |
| CN111203689A (en) * | 2020-01-15 | 2020-05-29 | 贵州航天朝阳科技有限责任公司 | Machining process for precision forming of hemispheroid of large thin-wall storage tank |
| CN111922168A (en) * | 2020-08-07 | 2020-11-13 | 贵州航天朝阳科技有限责任公司 | Precision forming method for large thin-wall storage box shell |
Non-Patent Citations (2)
| Title |
|---|
| 半球形壳体旋压工艺与模具设计;王幸运等;《锻压技术》;20170625(第06期);第151-155页 * |
| 大型薄壁铝合金半球壳体旋压成形工艺研究;阴中炜等;《材料科学与工艺》;20130815;第21卷(第04期);第127-130页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113059325A (en) | 2021-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113059325B (en) | Precision forming method for large-size variable-curvature thin-wall storage tank diaphragm | |
| CN111203689B (en) | Machining process for precision forming of hemispheroid of large thin-wall storage tank | |
| CN104384825B (en) | Machining deformation control method of bushing thin-wall part | |
| CN110394604A (en) | A kind of processing method and processing unit (plant) of cobalt base superalloy Thin-walled part | |
| CN107263176A (en) | The fixture and processing method of a kind of L-type annular thin-wall parts | |
| CN107243649B (en) | A kind of large scale angular contact thrust ball bearing retainer smart car technique | |
| CN111922168B (en) | Precision forming method for large thin-wall storage box shell | |
| CN110509016B (en) | Manufacturing process of ultra-fine hard alloy milling cutter | |
| CN102489720A (en) | Process for controlling machining deformation of L-shaped aluminum alloy thin-wall end frames | |
| CN112247483A (en) | 2195 aluminum-lithium alloy special-shaped cross section structure and spinning method thereof | |
| CN203830997U (en) | Diamond grinding wheel welding fixture | |
| CN107442780A (en) | A kind of processing method for solving the thin-wall special-shaped part embrittlement of fragility | |
| CN201505847U (en) | Chamfering device of inner round arris edge | |
| CN107097044B (en) | Machining process and tool device for large nuclear main pump shielding motor balance ring | |
| CN109746521B (en) | Machining device and machining method for large thin-wall workpiece with U-shaped ring groove | |
| CN106903487B (en) | A kind of method and its fixture for the processing of foot piece part | |
| CN207267172U (en) | A kind of auxiliary processing device for being used to clamp the thin-wall special-shaped part of brittleness | |
| CN113102767B (en) | 3D printing process method for integrally preparing plate-type surface tension storage tank | |
| CN101574710A (en) | Process for machining and manufacturing supporting ring | |
| CN112338454B (en) | Three-dimensional simulation machining tool and method for special-shaped stainless steel thin-wall part | |
| CN106583755A (en) | Machining method for omega-shaped ring sealing washer | |
| CN108705268B (en) | Land wind driven generator flange machining process | |
| CN207043761U (en) | A kind of fixture for being used to process thin-walled ring external diameter | |
| CN114161080A (en) | Machining method for thin-wall special-shaped pipe body parts | |
| CN112676891A (en) | Split type aligning device processed at high precision and aligning method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |