CN108176931B - Special tool for preventing titanium alloy from deforming during repair welding - Google Patents
Special tool for preventing titanium alloy from deforming during repair welding Download PDFInfo
- Publication number
- CN108176931B CN108176931B CN201711225886.XA CN201711225886A CN108176931B CN 108176931 B CN108176931 B CN 108176931B CN 201711225886 A CN201711225886 A CN 201711225886A CN 108176931 B CN108176931 B CN 108176931B
- Authority
- CN
- China
- Prior art keywords
- side wall
- wall surface
- edge
- special tool
- arc
- 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.)
- Expired - Fee Related
Links
- 230000008439 repair process Effects 0.000 title claims abstract description 41
- 238000003466 welding Methods 0.000 title claims abstract description 32
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 abstract description 39
- 238000000034 method Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a special tool for preventing deformation of a titanium alloy during repair welding, and belongs to the technical field of deformation control and repair processes of large complex thin-wall titanium alloy castings. The special tool is a solid tool made of metal with high heat conductivity and comprises six side wall surfaces, an arc-shaped upper surface and a plane lower surface. The special tool is suitable for the field of repair welding and repairing of the titanium alloy castings, and has the advantage of preventing deformation of the titanium alloy castings during repair welding.
Description
Technical Field
The invention relates to a special tool for preventing deformation of titanium alloy during repair welding, and belongs to the technical field of deformation control and repair processes of large complex thin-wall titanium alloy castings.
Background
The titanium alloy is applied to military departments such as aerospace and aviation and civil industries such as chemical industry, metallurgy and energy sources by virtue of excellent tensile strength, fracture performance, heat resistance and corrosion resistance, the application field is wider and wider, and the use amount is larger and larger. Titanium alloys are difficult to machine and the parts are expensive to manufacture resulting in limited use. One of the methods to solve this problem is to vigorously develop near-net-shape forming techniques. The machining technology without allowance or nearly without allowance is one of effective ways for reducing the use cost of the titanium alloy. The processing technologies such as forging, superplastic forming, machining, welding, casting and the like can realize allowance-free and near-allowance-free processing. However, for a member with a complicated structure, the casting method is a near-net-shape forming method with great attraction, so that the metal loss is greatly reduced, the utilization rate of materials is improved, the production period is shortened, a large amount of machining working hours are reduced, and the production cost can be reduced.
In the production process of castings, defects are inevitably generated inside the castings, and repair welding is a very common repair process in the process of removing the defects.
In the repair welding process, a large amount of heat is concentrated on the local part of the casting, the heat conductivity of titanium is poor, the heat conductivity of the titanium alloy becomes worse along with the addition of alloy elements, the temperature difference between a repair welding area and a heat affected zone is large, the shrinkage is uneven in the process of cooling to room temperature at the same time, the casting is deformed, and the deformation is prevented in the repair welding process because many castings are large, complex and thin-walled.
Disclosure of Invention
The invention provides a special tool for preventing deformation of a titanium alloy repair welding process, aiming at solving the problem that the casting deforms due to natural cooling shrinkage caused by overhigh local heat in the repair welding repair process of a large, complex and thin-walled titanium alloy casting, and adopting the following technical scheme:
a special tool for preventing deformation of titanium alloy during repair welding is a solid tool made of metal with high thermal conductivity, and the side wall of the special tool comprises a first side wall surface 1, a second side wall surface 2, a third side wall surface 3, a fourth side wall surface 4, a fifth side wall surface 5 and a sixth side wall surface 6; the first side wall surface 1, the second side wall surface 2, the third side wall surface 3, the fourth side wall surface 4, the fifth side wall surface 5 and the sixth side wall surface 6 are sequentially connected in a closing manner in an ending manner; the upper surface of the special tool is of an arc structure; the lower surface of the special tool is of a planar structure.
Furthermore, the first side wall surface 1 adopts a plane structure and is formed by closing an arc line edge, a bottom edge and a side edge; the bottom edge is the edge of the first side wall surface 1 connected with the lower surface of the special tool; the side edge is the edge connecting the first side wall surface 1 and the second side wall surface 2; the bottom edge of the first side wall surface 1 is parallel to the central axis of the first side wall surface 1 in the horizontal direction; the bottom edge is connected with the side edge at an angle of 90 degrees.
Further, the length of the bottom edge is 103.7 mm; the length of the side edge is 31.9 mm; the arc edge is a part of arc length of an ellipse with a major axis of 296mm and a minor axis of 40 mm; the arc length of the arc edge is greater than 1/4 arc lengths of the ellipse; the side edge is located on the minor axis of the ellipse and the area of the first sidewall surface 1 is greater than the 1/4 area of the ellipse.
Further, the second side wall surface 2 is of an arc structure, and the second side wall surface 2 is concave towards the central position of the special tool; the arc length of the second side wall surface 2 is 215.4mm, and the central angle gamma is the arc length corresponding to 25 degrees; the side length of the second side wall surface 2 is 31.9 mm.
Further, the third side wall surface 3 is of an arc structure, the third side wall surface 3 is concave towards the center of the special tool, the arc length of the third side wall surface 3 is an arc length corresponding to the radius of 38.6mm and the central angle α of 124 degrees, and the side length of the second side wall surface 2 is 23.7mm, namely the side connected with the second side wall surface 2 and the fourth side wall surface 4.
Further, the fourth side wall surface 4 adopts a rectangular plane structure, and the bottom edge of the fourth side wall surface 4 is 31.5 mm; the side edge of the fourth side wall surface 4 is 31.9 mm; the side edge of the fourth side wall surface 4 is a side edge connected to the third side wall surface 3 and the fifth side wall surface 5.
Further, the fifth side wall surface 5 adopts a plane structure and is formed by closing an arc line edge, a bottom edge and a side edge; the bottom edge is the edge of the fifth side wall surface 5 connected with the lower surface of the special tool; the bottom edge of the fifth side wall surface 5 is parallel to the central axis of the fifth side wall surface 5 in the horizontal direction; the side edge is the edge connecting the fifth side wall surface 5 and the fourth side wall surface 4; the bottom edge is connected with the side edge at an angle of 90 degrees.
Further, the length of the bottom edge is 35.8 mm; the side edges are 23.7 mm; the arc edge is a part of arc length of an ellipse with a major axis of 236mm and a minor axis of 32 mm; the arc length of the arc edge is greater than 1/4 arc length of the ellipse, the side edge lies on the minor axis of the ellipse, and the area of the fifth side wall face 5 is greater than 1/4 area of the ellipse.
Furthermore, the sixth side wall surface 6 is of an arc structure, the sixth side wall surface 6 protrudes outwards in the opposite direction of the center position of the special tool, the arc length of the sixth side wall surface 6 is equal to the arc length corresponding to the radius of 295.5mm, the central angle β is 29 degrees, and two ends of the sixth side wall surface 6 are respectively connected with the arc edges of the first side wall surface 1 and the fifth side wall surface 5.
The invention has the beneficial effects that:
in the repair welding process, a large amount of heat is concentrated on the local part of the casting, the heat conductivity of titanium is poor, the heat conductivity of the titanium alloy becomes worse along with the addition of alloy elements, the temperature difference between a repair welding area and a heat affected zone is large, the shrinkage is uneven in the process of cooling to room temperature at the same time, the casting is easy to deform, if the casting with a complex structure deforms, the shape correction work is not easy to develop, therefore, when the repair welding repair is carried out on the casting, the casting deformation is avoided to the maximum extent, if the casting deformation is well controlled, the shape correction operation is not needed, and the special tool provided by the invention can avoid the deformation caused by the repair welding to the maximum extent, so that the shape correction is not needed.
The special tool for preventing the deformation of the titanium alloy during repair welding is tightly attached to the repaired casting during working, the contact surface of the tool and the repaired casting needs to follow the shape, the rest parts of the tool do not interfere with the repaired casting, and the tool has a thick and large area and is beneficial to the collection, conduction and emission of heat. The special tool for preventing the deformation of the titanium alloy during repair welding can effectively prevent the casting from deforming due to natural cooling shrinkage caused by overhigh local heat in the repair welding repair process of a large, complex and thin-walled titanium alloy casting, can reduce the deformation caused in the repair welding repair process of the titanium alloy casting as much as possible, and improves the yield of the titanium alloy casting.
Drawings
Fig. 1 is a first schematic structural diagram of the special tool of the present invention.
Fig. 2 is a schematic structural diagram of the special tool of the present invention.
Fig. 3 is a third schematic structural diagram of the special tool of the present invention.
Fig. 4 is a fourth schematic structural diagram of the special tool of the present invention.
Fig. 5 is a fifth schematic structural diagram of the special tool of the present invention.
Fig. 6 is a sixth schematic structural view of the special tool of the present invention.
Fig. 7 is a seventh schematic structural diagram of the special tool of the present invention.
(1, first side wall face; 2, second side wall; 3, third side wall face; 4, fourth side wall face; 5, fifth side wall face; 6, sixth side wall face)
Detailed Description
The present invention will be further described with reference to the following specific examples, but the present invention is not limited to these examples.
As shown in fig. 1 to 7, a special tool for preventing deformation of a titanium alloy during repair welding is a solid tool made of red copper or brass, and a sidewall of the special tool includes a first sidewall 1, a second sidewall 2, a third sidewall 3, a fourth sidewall 4, a fifth sidewall 5, and a sixth sidewall 6; the first side wall surface 1, the second side wall surface 2, the third side wall surface 3, the fourth side wall surface 4, the fifth side wall surface 5 and the sixth side wall surface 6 are sequentially connected in a closing manner in an ending manner; the upper surface of the special tool is of an arc structure; the lower surface of the special tool is of a planar structure.
The first side wall surface 1 is of a plane structure and is formed by closing an arc line edge, a bottom edge and a side edge; the bottom edge is the edge of the first side wall surface 1 connected with the lower surface of the special tool; the side edge is the edge connecting the first side wall surface 1 and the second side wall surface 2; the bottom edge of the first side wall surface 1 is parallel to the central axis of the first side wall surface 1 in the horizontal direction; the bottom edge is connected with the side edge at an angle of 90 degrees.
The length of the bottom edge is 103.7 mm; the length of the side edge is 31.9 mm; the arc edge is a part of arc length of an ellipse with a major axis of 296mm and a minor axis of 40 mm; the arc length of the arc edge is greater than 1/4 arc lengths of the ellipse; the side edge is located on the minor axis of the ellipse and the area of the first sidewall surface 1 is greater than the 1/4 area of the ellipse.
The second side wall surface 2 is of an arc structure, and the second side wall surface 2 is concave towards the direction of the central position of the special tool; the arc length of the second side wall surface 2 is 215.4mm, and the central angle gamma is the arc length corresponding to 25 degrees; the side length of the second side wall surface 2 is 31.9 mm.
The third side wall surface 3 is of an arc structure, the third side wall surface 3 is concave towards the center of the special tool, the arc length of the third side wall surface 3 is an arc length corresponding to the radius of 38.6mm and the central angle α of 124 degrees, and the side length of the second side wall surface 2 is 23.7mm, namely the side connected with the second side wall surface 2 and the fourth side wall surface 4.
The fourth side wall surface 4 is of a rectangular plane structure, and the bottom edge of the fourth side wall surface 4 is 31.5 mm; the side edge of the fourth side wall surface 4 is 31.9 mm; the side edge of the fourth side wall surface 4 is a side edge connected to the third side wall surface 3 and the fifth side wall surface 5.
The fifth side wall surface 5 is of a plane structure and is formed by closing an arc line edge, a bottom edge and a side edge; the bottom edge is the edge of the fifth side wall surface 5 connected with the lower surface of the special tool; the bottom edge of the fifth side wall surface 5 is parallel to the central axis of the fifth side wall surface 5 in the horizontal direction; the side edge is the edge connecting the fifth side wall surface 5 and the fourth side wall surface 4; the bottom edge is connected with the side edge at an angle of 90 degrees.
The length of the bottom edge is 35.8 mm; the length of the side edge is 23.7 mm; the arc edge is a part of arc length of an ellipse with a major axis of 236mm and a minor axis of 32 mm; the arc length of the arc edge is greater than 1/4 arc length of the ellipse, the side edge lies on the minor axis of the ellipse, and the area of the fifth side wall face 5 is greater than 1/4 area of the ellipse.
Furthermore, the sixth side wall surface 6 is of an arc structure, the sixth side wall surface 6 protrudes outwards in the opposite direction of the center position of the special tool, the arc length of the sixth side wall surface 6 is equal to the arc length corresponding to the radius of 295.5mm, the central angle β is 29 degrees, and two ends of the sixth side wall surface 6 are respectively connected with the arc edges of the first side wall surface 1 and the fifth side wall surface 5.
In the repair welding process, a large amount of heat is concentrated on the local part of the casting, the heat conductivity of titanium is poor, the heat conductivity of the titanium alloy becomes worse along with the addition of alloy elements, the temperature difference between a repair welding area and a heat affected zone is large, the shrinkage is uneven in the process of cooling to room temperature at the same time, the casting is easy to deform, if the casting with a complex structure deforms, the shape correction work is not easy to develop, therefore, when the repair welding repair is carried out on the casting, the casting deformation is avoided to the maximum extent, if the casting deformation is well controlled, the shape correction operation is not needed, and the special tool provided by the invention can avoid the deformation caused by the repair welding to the maximum extent, so that the shape correction is not needed. The special tool for preventing the deformation of the titanium alloy during repair welding is tightly attached to the repaired casting during working, the contact surface of the tool and the repaired casting needs to follow the shape, the rest parts of the tool do not interfere with the repaired casting, and the tool has a thick and large area and is beneficial to the collection, conduction and emission of heat. The special tool for preventing the deformation of the titanium alloy during repair welding can effectively prevent the casting from deforming due to natural cooling shrinkage caused by overhigh local heat in the repair welding repair process of a large, complex and thin-walled titanium alloy casting, can reduce the deformation caused in the repair welding repair process of the titanium alloy casting as much as possible, and improves the yield of the titanium alloy casting.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A special tool for preventing deformation of titanium alloy during repair welding is a solid tool made of metal with high thermal conductivity, and is characterized in that the side wall of the special tool comprises a first side wall surface (1), a second side wall surface (2), a third side wall surface (3), a fourth side wall surface (4), a fifth side wall surface (5) and a sixth side wall surface (6); the first side wall surface (1), the second side wall surface (2), the third side wall surface (3), the fourth side wall surface (4), the fifth side wall surface (5) and the sixth side wall surface (6) are sequentially connected in a closed manner from head to tail; the upper surface of the special tool is of a curved surface structure; the lower surface of the special tool is of a planar structure, and the first side wall surface (1) is of a planar structure and is formed by closing an arc line edge, a bottom edge and a side edge; the bottom edge is the edge of the first side wall surface (1) connected with the lower surface of the special tool; the side edge is the edge connecting the first side wall surface (1) and the second side wall surface (2); the bottom edge of the first side wall surface (1) is parallel to the central axis of the first side wall surface (1) in the horizontal direction; the bottom edge is connected with the side edge at an angle of 90 degrees.
2. The special tool according to claim 1, wherein the arc sides are a part of the arc length of the ellipse; the arc length of the arc edge is greater than 1/4 arc lengths of the ellipse; the side is located on the minor axis of the ellipse and the area of the first sidewall surface (1) is greater than the 1/4 area of the ellipse.
3. The special tool according to claim 1, wherein the second side wall surface (2) is of a circular arc structure, and the second side wall surface (2) is concave towards the center of the special tool.
4. The special tool according to claim 1, wherein the third sidewall surface (3) adopts a circular arc structure, and the third sidewall surface (3) is concave towards the center of the special tool; the side edge of the second side wall surface (2) is the side edge connected with the second side wall surface (2) and the fourth side wall surface (4).
5. The special tool according to claim 1, wherein the fourth side wall surface (4) is a rectangular plane structure, and a side edge of the fourth side wall surface (4) is a side edge connected with the third side wall surface (3) and the fifth side wall surface (5).
6. The special tool according to claim 2, wherein the fifth side wall surface (5) is of a plane structure and is formed by closing an arc line edge, a bottom edge and a side edge; the bottom edge is the edge of the fifth side wall surface (5) connected with the lower surface of the special tool; the bottom edge of the fifth side wall surface (5) is parallel to the central axis of the fifth side wall surface (5) in the horizontal direction; the side edge is the edge connecting the fifth side wall surface (5) and the fourth side wall surface (4); the bottom edge is connected with the side edge at an angle of 90 degrees.
7. The special tool according to claim 6, wherein the arc edge is a part of the arc length in the direction of the ellipse major axis; the arc length of the arc edge is greater than 1/4 arc length of the ellipse, the side edge lies on the minor axis of the ellipse, and the area of the fifth side wall face (5) is greater than 1/4 area of the ellipse.
8. The special tool according to claim 1 or 6, wherein the sixth side wall surface (6) is of an arc structure, and the sixth side wall surface (6) is convex outward in the opposite direction to the center position of the special tool; and two ends of the sixth side wall surface (6) are respectively connected with the arc edges of the first side wall surface (1) and the fifth side wall surface (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711225886.XA CN108176931B (en) | 2017-11-24 | 2017-11-24 | Special tool for preventing titanium alloy from deforming during repair welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711225886.XA CN108176931B (en) | 2017-11-24 | 2017-11-24 | Special tool for preventing titanium alloy from deforming during repair welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108176931A CN108176931A (en) | 2018-06-19 |
| CN108176931B true CN108176931B (en) | 2020-06-16 |
Family
ID=62545500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711225886.XA Expired - Fee Related CN108176931B (en) | 2017-11-24 | 2017-11-24 | Special tool for preventing titanium alloy from deforming during repair welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108176931B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201799811U (en) * | 2010-09-29 | 2011-04-20 | 廊坊广厦新源石化设备制造有限公司 | Shell deformation preventing tool |
| CN102229030B (en) * | 2011-05-06 | 2014-11-05 | 奇瑞重工股份有限公司 | Device and method for preventing welding deformation of supporting burden |
| CN202804552U (en) * | 2012-10-25 | 2013-03-20 | 中国五冶集团有限公司 | Jig frame used for preventing plate element from welding deformation |
| CN203292753U (en) * | 2013-06-09 | 2013-11-20 | 西安泰金工业电化学技术有限公司 | Locating tool for preventing welding deformation of anode supporting plate |
| CN106282517A (en) * | 2016-08-31 | 2017-01-04 | 共享铸钢有限公司 | The heat treatment deformation frock of Thin Wall Cylinder Blocks foundry goods and heat treatment shove charge method thereof |
-
2017
- 2017-11-24 CN CN201711225886.XA patent/CN108176931B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108176931A (en) | 2018-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204700224U (en) | The vertical split cast mounting of multinomial die forging | |
| CN103972628B (en) | Self-align step twist and vacuum brazing technique thereof | |
| JP5217460B2 (en) | Punching method with stepped punch | |
| CN103659184B (en) | A kind of welding method of radiating bottom plate | |
| CN108994135B (en) | Thermoforming and quenching integrated forming method | |
| CN108176931B (en) | Special tool for preventing titanium alloy from deforming during repair welding | |
| CN105643077A (en) | Spot welding technological method for aluminum alloy workpiece | |
| CN103643184B (en) | A kind of aluminium alloy height muscle integral panel creep age forming method based on autoclave | |
| CN218564618U (en) | Carbon steel forging pipe fitting | |
| CN104607863A (en) | Iron casting mold repair welding method | |
| CN201579358U (en) | Vertical aligning swage forging die for mounting edge | |
| CN110653403B (en) | Method for rapidly predicting cutting area of each tooth during fillet milling | |
| CN104690199B (en) | The free forging method of petroleum drilling and mining blowout preventer body | |
| CN110895634A (en) | 2.5 mm-thickness aluminum lithium alloy T-shaped joint welding structure integrated simulation method for precise deformation control | |
| CN210848158U (en) | End plate splayed forging die | |
| CN204565484U (en) | The welding tooling of a kind of economizer finned tube row | |
| CN205465855U (en) | Aluminium section processing is with preventing moving back clamping jig | |
| CN106862476B (en) | A kind of forging method of the large-scale aluminum matrix composite fan blade fine forge piece of aviation | |
| CN110714674A (en) | Seamless hinge and processing method thereof | |
| CN102896262B (en) | The processing method of the piston seat blank of high-silicon piston | |
| CN109807270A (en) | A kind of anti-oxidant, anti-corrosion, resistant to high temperature hafnium alloy processing technology | |
| CN213575077U (en) | T-shaped welding nut for automobile | |
| CN215902644U (en) | Forging burr-free structure | |
| CN216370764U (en) | Butt welding structure | |
| Park et al. | A study on the manufacturing of digital camera barrel using magnesium alloy |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |