CN109465321B - Manufacturing method of cylinder with annular inner reinforcing ribs - Google Patents
Manufacturing method of cylinder with annular inner reinforcing ribs Download PDFInfo
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- CN109465321B CN109465321B CN201811456677.0A CN201811456677A CN109465321B CN 109465321 B CN109465321 B CN 109465321B CN 201811456677 A CN201811456677 A CN 201811456677A CN 109465321 B CN109465321 B CN 109465321B
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 230000000670 limiting effect Effects 0.000 claims abstract description 20
- 230000004323 axial length Effects 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000009987 spinning Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 12
- 239000003610 charcoal Substances 0.000 claims description 4
- 230000008719 thickening Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000004904 shortening Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 8
- 230000033001 locomotion Effects 0.000 description 6
- 229910001069 Ti alloy Inorganic materials 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000109 continuous material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
- B21D51/10—Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Powder Metallurgy (AREA)
Abstract
In order to overcome the defects of the prior art, the invention provides a manufacturing method of a cylinder body with an inward reinforcing rib, which has high material utilization rate, high production efficiency and good product quality, wherein a blank part is sleeved at the end part of a core mould, a driving main shaft rotates and drives the core mould, a limiting device and the blank to rotate, under the blocking action of the limiting device and the axial pushing action of a tail top, the axial length of the blank is shortened, the radial thickness is increased, then a rotary wheel is controlled to be radially close to and extrude the end wall of the blank relative to the port of the rear end of the blank, under the limiting action of an annular groove at the end part of the core mould and the thrust action of the tail top, the port of the rear end of the blank is radially thickened and filled along with the radial feeding of the rotary wheel to form an inward radial annular internal reinforcing rib, the rotary wheel is controlled to axially move relative to a primary cylinder body, when the rotary wheel is close to enable the wall, thereby obtaining the cylinder with the inward reinforcing ribs.
Description
Technical Field
The invention belongs to the technical field of accurate plastic processing, and particularly relates to a manufacturing method of a cylinder body with annular inner reinforcing ribs.
Background
As an important resource metal, the titanium alloy is expensive, has the characteristics of high specific strength, wide use temperature range (-269-600 ℃), corrosion resistance, no magnetism, low damping, good high-low temperature performance and the like, can meet the structural lightweight requirements of thin-wall shell parts such as aviation, aerospace, weapons and the like, and the demand of China on the titanium alloy is increased at the speed of 20-30% per year along with the continuous and rapid development of national economy.
At present, the manufacturing method of the titanium alloy thin-wall cylinder with one end provided with the annular inner rib mainly comprises two methods of 'forge piece integral machining' and 'annular inner rib section integral machining + thin-wall cylinder section spinning', and has the following process defects: 1. the main process defects of obtaining the titanium alloy thin-wall cylinder part with the annular inner rib at one end by using the method of 'integral machining of forgings' are as follows: (a) a large amount of titanium materials are hollowed during processing, and the material utilization rate is low; (b) for thin-wall long-cylinder parts, the overall machining process difficulty is higher, the product precision is not easy to guarantee, and the machining period is longer; (c) the streamline of the material fiber is cut off, and the fatigue impact resistance is weaker. 2. The main process defects of obtaining the titanium alloy thin-wall cylinder part with the annular inner rib at one end by using the method of 'annular inner rib section integral machine adding + thin-wall cylinder section spinning': (a) although the length of the forge piece can be saved by spinning the thin-wall cylinder section, the thickness of the forge piece cannot be saved due to the existence of the annular inner ribs, more titanium materials are still hollowed during processing, and the material utilization rate is relatively low; (b) the material fiber streamline is cut off by the annular inner rib section obtained by machining, the material fiber streamline is not strengthened by spinning, and the fatigue impact resistance is weaker.
Disclosure of Invention
Based on the problems, the invention aims to overcome the defects of the prior art and provide the manufacturing method of the cylinder with the inward reinforcing ribs, which has the advantages of high material utilization rate, high production efficiency and good product quality.
In order to achieve the above purpose, the invention adopts the technical scheme that: a manufacturing method of a cylinder body with annular inner reinforcing ribs comprises the following steps:
In particular, the blank is a tube, usually of a diameter of
The wall thickness is 6-12 mm, the length is 200-1000 mm, and a gap which can be freely installed is reserved between the inner diameter and the outer diameter of the core mold, and is usually 0.20-0.30 mm; the tail jack is driven by an equipment oil cylinder and can provide a constant jacking force of 6 t-10 t; the rotary wheel is arranged on a rotary wheel shaft of the equipment, can do driven rotary motion along with the main shaft around the rotary wheel shaft and can also do radial and axial feed motion along with the rotary wheel shaft,the invention mainly adopts axial feeding motion, and the feeding speed is 100-300 mm/min.
Optimally, in order to avoid the defects of oxidation and the like of the outer surface of the core mold caused by overlong flame heating time, the core mold is preheated by adopting a medium-frequency induction heating coil in the step 1.
Optimally, a hollow inner cavity is formed in the core mold in the step 1, and a heating medium is filled in the hollow inner cavity to keep the temperature of the core mold at 500-550 ℃; the heating medium is preferably red-burned charcoal.
Specifically, in the step 2, a flame heating torch is adopted to heat the blank and keep the temperature of the blank within a range of 630-680 ℃, a large-diameter flame heating torch can be adopted, 2-3 flame heating torches are respectively arranged on two sides of the device, the heating uniformity is improved, and on the basis of the step 1, the blank and the core mold can be heated to 630-680 ℃ within a short time; in the whole manufacturing process, flame torch heat compensation is adopted on the outer surface of the blank all the time, and the heating and heat preservation combination of the flame torch heat compensation and the red charcoal firing in the hollow inner cavity of the core die in the optimized mode forms an isothermal spinning condition, effectively reduces the temperature gradient of the inner surface and the outer surface of the blank, and improves the alloy plasticity of the blank.
And coating graphite on the surface of the blank before heating the blank in the step 3 to prevent the blank from being oxidized.
The limiting device is an annular disc body, and further, the limiting device is fixed or moved through the servo oil cylinder.
The invention has the beneficial effects that:
1) the material utilization rate is high: according to the invention, by the technology of 'thickening filling and thinning increasing', the length and thickness of raw materials (pipes) are effectively saved, the precise forming of the annular inner rib section and the thin-wall cylinder section is realized, the machining size is limited to the length of two ends, the machining allowance is small, and the material utilization rate is high.
2) The production efficiency is high: the invention realizes the accurate forming of the whole part on one numerical control spinning machine, has no intermediate links such as secondary alignment, clamping and the like, and has the advantages of simple operation, greatly simplified production process, fast processing beat and high production efficiency.
3) The product quality is good: the product part obtained by the invention has continuous material fiber streamline, and the organization and the mechanical property are improved through the annular inner rib section filled by thickening and the thin-wall cylinder section increased by thinning, and compared with the traditional process, the product quality is greatly improved.
Drawings
FIG. 1 is a schematic view of steps 2 and 3;
FIG. 2 is a schematic view of step 4;
FIG. 3 is a sectional view of a cylinder with an inward reinforcing rib manufactured in the example;
wherein, 1 is the main shaft, 2 is the mandrel, 3 is stop device, 4 is the blank, 5 is the tail top, 6 is the spinning wheel, 7 is the barrel, 71 is the hoop internal strengthening rib.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Examples
The embodiment provides a manufacturing method of a cylinder body 7 with an inward reinforcing rib as shown in fig. 3, which comprises the following steps:
in the embodiment, a hollow inner cavity is arranged in the core mold 2, the core mold 2 is preheated by adopting a medium-frequency induction heating coil in the step 1, and the core mold 2 is kept at the temperature of 500-550 ℃ by filling red charcoal serving as a heating medium in the hollow inner cavity;
in the embodiment, in the step 2, a flame heating torch is used for heating the blank 4, and the temperature of the blank 4 is kept within the range of 630-680 ℃.
The above examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes and modifications of the present invention are within the scope of the present invention.
Claims (8)
1. The manufacturing method of the cylinder body with the annular inner reinforcing ribs is characterized by comprising the following steps:
step 1, sleeving and fixing a limiting device on a core mold connected with a main shaft, arranging an annular groove matched with a reinforcing inner rib on a cylinder body to be manufactured at the end part of the core mold, preheating the core mold and keeping the temperature of the core mold at 500-550 ℃;
step 2, sleeving the blank part on the end part of the core mold, arranging a tail top at the rear end of the blank, and arranging a rotary wheel on the side surface of the blank, wherein the rotary wheel can feed in the axial direction and the radial direction relative to the blank;
step 3, driving the main shaft to rotate and driving the core mold, the limiting device and the blank to rotate, heating the blank and keeping the temperature of the blank within a range of 630-680 ℃, pushing the tail top to be close to the core mold axially, shortening the axial length of the blank, increasing the radial thickness, then controlling the spinning wheel to radially feed and extrude the blank relative to the port at the rear end of the blank, and under the limiting action of the annular groove at the end part of the core mold and the thrust action of the tail top, radially thickening and filling the port at the rear end of the blank along with the radial feeding of the spinning wheel and forming a radially inward-protruding annular inner reinforcing rib, thereby obtaining a primary cylinder body with the annular inward reinforcing rib;
and 4, controlling the limiting device to axially move along the mold core through the servo oil cylinder and to be far away from the initial cylinder body, controlling the rotary wheel to axially feed relative to the initial cylinder body, enabling the initial cylinder body to flow along the outer wall of the mold core while rotating along with the mold core, increasing the axial length of the initial cylinder body, and reducing the radial thickness to finish the manufacture of the cylinder body, thereby obtaining the cylinder body with the inward reinforcing ribs.
2. The method for manufacturing the cylinder with the inward reinforcing ribs according to claim 1, wherein a medium-frequency induction heating coil is used for preheating the core mold in the step 1.
3. The method for manufacturing the cylinder with the inward-extending reinforcing ribs according to claim 1 or 2, wherein a hollow inner cavity is formed in the core mold in the step 1, and the core mold is filled with a heating medium to keep the temperature of the core mold at 500-550 ℃.
4. A method of manufacturing a cylinder with inward ribs according to claim 3 wherein the heating medium is red-fired charcoal.
5. The manufacturing method of the cylinder with the inward reinforcing ribs according to claim 1, wherein in the step 2, a flame heating torch is used for heating the blank and keeping the temperature of the blank within the range of 630-680 ℃.
6. The method for manufacturing the cylinder with the inward reinforcing ribs according to claim 1, wherein graphite is coated on the surface of the blank before the blank is heated in the step 2.
7. The method for manufacturing a cylinder with the inward reinforcing ribs according to claim 1, wherein the limiting device is an annular disc.
8. The method for manufacturing the cylinder with the inward reinforcing ribs according to claim 1, wherein the limiting device is fixed or moved by a servo oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456677.0A CN109465321B (en) | 2018-11-30 | 2018-11-30 | Manufacturing method of cylinder with annular inner reinforcing ribs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456677.0A CN109465321B (en) | 2018-11-30 | 2018-11-30 | Manufacturing method of cylinder with annular inner reinforcing ribs |
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| Publication Number | Publication Date |
|---|---|
| CN109465321A CN109465321A (en) | 2019-03-15 |
| CN109465321B true CN109465321B (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811456677.0A Active CN109465321B (en) | 2018-11-30 | 2018-11-30 | Manufacturing method of cylinder with annular inner reinforcing ribs |
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| CN (1) | CN109465321B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479841B (en) * | 2019-08-02 | 2020-08-25 | 武汉理工大学 | Multi-pass multi-directional rotary rolling forming method for large transverse high-rib thin-wall ring piece |
| CN110586730B (en) * | 2019-09-17 | 2021-06-29 | 上海交通大学 | Finished product of cylindrical part with inner wall longitudinal ribs and forming method thereof |
| CN113245428B (en) * | 2021-06-21 | 2023-06-27 | 西北工业大学 | Inclined rolling type spinning forming method for cylindrical part with inner ribs |
| CN114082825B (en) * | 2021-10-28 | 2022-12-30 | 上海交通大学 | Reverse flow spinning forming device for cylindrical part with grid ribs and control method |
| CN114160652B (en) | 2021-11-26 | 2022-10-04 | 西安泰金工业电化学技术有限公司 | Hot spinning forming method for large-diameter titanium alloy cylindrical part |
| CN114523027B (en) * | 2022-02-23 | 2023-12-22 | 西北工业大学 | Circular turning spinning forming method for spiral rib cylinder capable of eliminating height difference of circumferential rib filling |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921429A (en) * | 1982-07-28 | 1984-02-03 | Nissan Motor Co Ltd | Manufacture of thin cylinder having plural step difference on inside face |
| DE3423146A1 (en) * | 1984-02-02 | 1985-08-14 | Luchaire S.A., Paris | METHOD FOR SHAPING A RING BULB AT THE BOTTOM OF A ONE-PIECE METAL CIRCULAR VESSEL AND LIKE THIS VESSEL |
| CN108463296A (en) * | 2016-01-14 | 2018-08-28 | 都美工业株式会社 | Spinning apparatus and spin-on process |
| CN108500108A (en) * | 2017-02-27 | 2018-09-07 | 湖北三江航天红阳机电有限公司 | Circumferential muscle cylinder spinning tool and manufacturing process in a kind of band |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4354133B2 (en) * | 2001-08-10 | 2009-10-28 | カヤバ工業株式会社 | Cylinder processing method |
-
2018
- 2018-11-30 CN CN201811456677.0A patent/CN109465321B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921429A (en) * | 1982-07-28 | 1984-02-03 | Nissan Motor Co Ltd | Manufacture of thin cylinder having plural step difference on inside face |
| DE3423146A1 (en) * | 1984-02-02 | 1985-08-14 | Luchaire S.A., Paris | METHOD FOR SHAPING A RING BULB AT THE BOTTOM OF A ONE-PIECE METAL CIRCULAR VESSEL AND LIKE THIS VESSEL |
| CN108463296A (en) * | 2016-01-14 | 2018-08-28 | 都美工业株式会社 | Spinning apparatus and spin-on process |
| CN108500108A (en) * | 2017-02-27 | 2018-09-07 | 湖北三江航天红阳机电有限公司 | Circumferential muscle cylinder spinning tool and manufacturing process in a kind of band |
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| CN109465321A (en) | 2019-03-15 |
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Effective date of registration: 20240329 Address after: 610000 Chengdu 189 economic and Technological Development Zone (Longquanyi District), Sichuan. Patentee after: Chengdu Aerospace Long March Machinery Co.,Ltd. Country or region after: China Address before: 610100 Chengdu 189 economic and Technological Development Zone (Longquanyi District), Sichuan. Patentee before: SICHUAN AEROSPACE CHANGZHENG EQUIPMENT MANUFACTURING Co.,Ltd. Country or region before: China |
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