CN103639639A - Thin-walled cylinder body welding and shaping clamp - Google Patents
Thin-walled cylinder body welding and shaping clamp Download PDFInfo
- Publication number
- CN103639639A CN103639639A CN201310582173.4A CN201310582173A CN103639639A CN 103639639 A CN103639639 A CN 103639639A CN 201310582173 A CN201310582173 A CN 201310582173A CN 103639639 A CN103639639 A CN 103639639A
- Authority
- CN
- China
- Prior art keywords
- thin
- transfer unit
- force transfer
- piece
- base
- 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.)
- Granted
Links
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
- 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
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
-
- 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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a thin-walled cylinder body welding and shaping clamp which comprises a supporting ring, expansion blocks, guide assembles and force transmission assemblies. The force transmission assembly comprises a first base and a transmission screw which is installed in a screw hole formed in the first base. Each guide assembly comprises a second base and a guide pin which is installed in a through hole formed in the second base in an inserted mode. The number of the expansion blocks is at least three. The number of the force transmission assemblies is equal to that of the expansion blocks. Each force transmission assembly set is provided with two guide assembly sets. All the force transmission assemblies are installed on the top face of the supporting ring away from one another by the same angle. The two guide assembly sets of each force transmission assembly set are symmetrically arranged on the two sides of the force transmission assembly set. One expansion block is assembled with one force transmission assembly set. All the expansion blocks are connected with the guide pins of the guide assemblies on the two sides of the force transmission assemblies which are assembled with the expansion blocks.
Description
Technical field
The invention belongs to welding and school clamp, particularly need be along thin-wall barrel fixture and school clamp longitudinal or that use when thin-wall barrel periphery welds.
Background technology
On the thin-wall barrel forming in panel beating, along it, during longitudinally or around its peripheral weld pipe fitting, easily make cylindrical shell produce distortion, thereby need to use fixture during welding, after welding, need to correct shape with fixture.The quality of fixture, operation convenience, expense etc. directly affect production cost and the crudy of sheet metal component.Existing fixture conventionally, only for a certain operation design, is only suitable for a certain operation and uses, and complex structure, heaviness, and inconvenient operation, thereby application surface is narrow, and utilization rate is low, and cost of manufacture is higher, causes welding, school to form this increase, and be difficult to guarantee crudy.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of simple in structure, highly versatile, thin-wall barrel welding and school clamp easy to use are provided, to guarantee crudy, and reduce costs.
Thin-wall barrel welding of the present invention and school clamp, by support ring, the piece that rises, guidance set and force transfer unit, formed, described force transfer unit comprises the first base and is arranged on the power screw in the set screw of the first base, and described guidance set comprises the second base and is inserted into the guide pin in the set through hole of the second base, the quantity of piece of rising is at least three, and the quantity of force transfer unit is identical with the quantity of the piece that rises, and a set of force transfer unit is equipped with two cover guidance sets, the combination of above-mentioned member and assembly: each overlaps force transfer unit and is arranged on the end face of support ring at a distance of equal angles, and the center line of power screw and the center line of support ring that respectively overlap force transfer unit intersect at a bit, each overlaps the two cover guidance set symmetries that force transfer unit is equipped with and is arranged on its both sides, and the power screw center line of the force transfer unit that the center line of the guide pin of described two cover guidance sets is corresponding with it is parallel, rise piece and an a set of force transfer unit assembly, the piece that respectively rises is connected with the guide pin of the guidance set of the force transfer unit both sides of its assembly respectively.
Thin-wall barrel welding of the present invention and school clamp, the lateral surface of its piece that rises is arc surface, the centre of medial surface is provided with the groove mating with the end of power screw.
In thin-wall barrel welding of the present invention and school clamp, the guide pin free end of its guidance set is provided with step.Can determine the support amount of rising to thin-wall barrel by the gap with step described in clearance gauge or kind of calliper and the second base, make the support amount of rising adjustable and guarantee the uniformity that support is risen, and step can also prevent support rise excessive.
The using method of thin-wall barrel welding of the present invention and school clamp:
1, for welding
(1) thin-wall barrel welding of the present invention is sling with school clamp, put into thin wall cylinder parts inner chamber to be welded.
(2) with spanner, rotate the power screw of each force transfer unit in thin-wall barrel welding of the present invention and school clamp, promote respectively to rise piece to the direction motion away from support ring center and contact with thin-wall barrel inwall, by welding requirements, evenly or anisotropically thin-wall barrel inwall being propped up.
(3) weld.
(4) after weld seam is cooling, with spanner, rotate backward the power screw of each force transfer unit in thin-wall barrel welding of the present invention and school clamp, and operate the guide pin of each guidance set in thin-wall barrel of the present invention welding and school clamp, make respectively to rise piece to the motion of support ring center position, depart from thin-wall barrel inwall.
(5) thin-wall barrel welding of the present invention is sling with school clamp, take out the thin wall cylinder parts after welding.
2, for school shape
(1) thin-wall barrel welding of the present invention is sling with school clamp, put into and treat school shape thin wall cylinder parts inner chamber.
(2) with spanner, rotate the power screw of each force transfer unit in thin-wall barrel welding of the present invention and school clamp, promote respectively to rise piece to the direction motion away from support ring center and contact with thin-wall barrel inwall, by school shape requirement, evenly or anisotropically thin-wall barrel inwall being propped up.
(3) with wooden mallet, knock the support bulging face of thin-wall barrel, described shape face and thin-wall barrel of the present invention welding and the piece that rises of school clamp are fitted.
(4) after school shape completes, with spanner, rotate backward the power screw of each force transfer unit in thin-wall barrel welding of the present invention and school clamp, and operate the guide pin of each guidance set in thin-wall barrel of the present invention welding and school clamp, make respectively to rise piece to the motion of support ring center position, depart from thin-wall barrel inwall.
(5) thin-wall barrel welding of the present invention is sling with school clamp, take out the thin wall cylinder parts after the shape of school.
The beneficial effect of thin-wall barrel welding of the present invention and school clamp:
1, the highly versatile of thin-wall barrel of the present invention welding and school clamp, only needs to be equipped with power screw and the guide pin of different length, just applicable to welding and the school shape of the thin wall cylinder parts of different inner cavity sizes.
2, thin-wall barrel welding of the present invention and school clamp both can be used for the welding of thin wall cylinder parts, can be used for again the school shape of thin wall cylinder parts, thereby use face expanded.
3, thin-wall barrel welding of the present invention and school clamp, the group mode of its piece that rises, guidance set and force transfer unit is only exerted all one's strength along the transfers of power screw, it is consistent that two guide pins of power screw both sides stretch out direction, rising by piece can only be along a direction stable motion, thereby has guaranteed support is risen to thin wall cylinder parts accuracy and reliability.
4, owing to being provided with step at guide pin free end, thus support rise by the time support amount of rising can be controlled in scope of design, and be convenient to know the regulated support amount of rising.
5, thin-wall barrel of the present invention welding is simple in structure, lightweight with school clamp, compare with traditional weld jig, weight saving more than 50%, manufacturing cost can reduce more than 50%.
6, thin-wall barrel of the present invention welding is easy to operate with school clamp, only need rotate the power screw piece that can make to rise with spanner and evenly or anisotropically thin-wall barrel inwall be propped up by welding requirements or school shape requirements, meets and welds or the needs of school shape; After welding or school shape complete, the taking-up of described fixture is also very simple, convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of thin-wall barrel welding of the present invention and school clamp;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 is thin-wall barrel of the present invention welding with school clamp when welding or the school shape and is soldered or by the assembling schematic diagram of school shape thin wall cylinder parts;
Fig. 5 is the A-A cutaway view of Fig. 4.
In figure, 1-support ring, the 2-the second base, the 3-the second hold-down screw, the 4-the second shop bolt, 5-guide pin, the 6-the first base, 7-power screw, the 8-the first hold-down screw, the 9-the first shop bolt, the 10-piece that rises, 11-fixing pin, 12-step, 13-thin wall cylinder parts in figure.
The specific embodiment
Below by embodiment, also by reference to the accompanying drawings thin-wall barrel welding of the present invention is described further with the structure of school clamp.
In the present embodiment, thin-wall barrel welding and welding and the school shape of school clamp for Circular Thin cylinder part, its structure as shown in Figure 1, Figure 2, Figure 3 shows, is comprised of support ring 1, rise piece 10, guidance set and force transfer unit; Described force transfer unit comprises the first base 6 and is arranged on the power screw 7 in the set screw of the first base, described guidance set comprises the second base 2 and is inserted into the guide pin 5 in the set through hole of the second base, one end of guide pin is provided with step 12, described support ring 1 is circular ring bodies, the lateral surface of the described piece 10 that rises is arc surface, medial surface, left surface, right flank, end face and bottom surface are plane, and the centre of medial surface is provided with the groove mating with the end of power screw 7.The quantity of piece 10 of rising is six, and the quantity of force transfer unit is six covers, and the quantity of guidance set is 12 covers, and every cover force transfer unit is equipped with two cover guidance sets.
The assembling mode of above-mentioned member and assembly:
Six cover force transfer units are arranged on the end face of support ring 1 at a distance of equal angles (60 °), and the center line of power screw 7 and the center lines of support ring 1 of six cover force transfer units intersect at a bit, force transfer unit is by the fixing (see figure 1) of its first base 6 by two the first shop bolts 9 and two the first hold-down screws 8 at the mounting means of support ring 1 end face; The two cover guidance set symmetries that every cover force transfer unit is equipped with are arranged on its both sides, and power screw 7 center lines of the force transfer unit that the center line of the guide pin 5 of described two cover guidance sets is corresponding with it are parallel, guide pin 5 is provided with one end of step towards the center of support ring 1, and guidance set is by the fixing (see figure 1) of its second base 2 by two the second shop bolts 4 and two the second hold-down screws 3 at the mounting means of support ring 1 end face; Rise piece 10 and an a set of force transfer unit assembly, the medial surface of the piece power screw 7 in the force transfer unit of its assembly respectively rises, and with the guide pin 5 of the guidance set of the force transfer unit both sides of its assembly, step end is not set respectively and is connected, connected mode is by fixing pin 11 (see figure 1) that is connected.
During welding, the thin-wall barrel welding in the present embodiment is shown in Fig. 4, Fig. 5 with the assembling mode of school clamp and soldered thin wall cylinder parts.
Claims (3)
1. a thin-wall barrel welds and school clamp, it is characterized in that being formed by support ring (1), the piece that rises (10), guidance set and force transfer unit, described force transfer unit comprises the first base (6) and is arranged on the power screw (7) in the set screw of the first base, and described guidance set comprises the second base (2) and is inserted into the guide pin (5) in the set through hole of the second base; The quantity of piece (10) of rising is at least three, and the quantity of force transfer unit is identical with the quantity of the piece that rises (10), and a set of force transfer unit is equipped with two cover guidance sets;
Each overlaps force transfer unit and at a distance of equal angles, is arranged on the end face of support ring (1), and the center line of power screw (7) and the center line of support ring (1) that respectively overlap force transfer unit intersect at a bit, each overlaps the two cover guidance set symmetries that force transfer unit is equipped with and is arranged on its both sides, and power screw (7) center line of the force transfer unit that the center line of the guide pin (5) of described two cover guidance sets is corresponding with it is parallel, the piece that rises (10) and a set of force transfer unit assembly, the piece that respectively rises is connected with the guide pin (5) of the guidance set of the force transfer unit both sides of its assembly respectively.
2. thin-wall barrel welding and school clamp according to claim 1, the lateral surface of the piece (10) that rises described in it is characterized in that is arc surface, the centre of medial surface is provided with the groove mating with the end of power screw (7).
3. according to thin-wall barrel welding and school clamp described in claim 1 or 2, it is characterized in that the guide pin free end of described guidance set is provided with step (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310582173.4A CN103639639B (en) | 2013-11-19 | 2013-11-19 | A kind of thin-wall barrel welding and school clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310582173.4A CN103639639B (en) | 2013-11-19 | 2013-11-19 | A kind of thin-wall barrel welding and school clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103639639A true CN103639639A (en) | 2014-03-19 |
| CN103639639B CN103639639B (en) | 2016-05-18 |
Family
ID=50244996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310582173.4A Active CN103639639B (en) | 2013-11-19 | 2013-11-19 | A kind of thin-wall barrel welding and school clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103639639B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105414875A (en) * | 2016-01-11 | 2016-03-23 | 株洲华盛实业有限公司 | Railway straight tank, cylinder docking adjustor of V-shaped tank and cylinder docking method |
| CN105856099A (en) * | 2016-04-29 | 2016-08-17 | 宿州市冠星金属制品制造有限公司 | Stable and adjustable clamp for steel belts |
| CN105923233A (en) * | 2016-04-29 | 2016-09-07 | 宿州市冠星金属制品制造有限公司 | Support-free steel-belt-adjustable fixture |
| CN106141754A (en) * | 2015-04-09 | 2016-11-23 | 哈尔滨建成集团有限公司 | A kind of special fixture processing connection steel band assembly |
| CN106425273A (en) * | 2016-12-23 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Annular welding seam supporting clamp used for thin-wall cylindrical part machining |
| CN106425256A (en) * | 2016-11-23 | 2017-02-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Bidirectional location thin-walled workpiece welding clamp |
| CN107617989A (en) * | 2017-09-29 | 2018-01-23 | 苏州海陆重工股份有限公司 | Pin-connected panel holds round frock |
| CN108838612A (en) * | 2018-09-05 | 2018-11-20 | 中国航发动力股份有限公司 | A kind of large diameter thin wall case weld boss anti-deformation device |
| CN112371776A (en) * | 2020-10-22 | 2021-02-19 | 中国航发贵州黎阳航空动力有限公司 | Vacuum thermal sizing die and method for engine support case |
| CN113102561A (en) * | 2021-03-03 | 2021-07-13 | 山西汾西重工有限责任公司 | Shape correcting device |
| CN113732115A (en) * | 2021-10-11 | 2021-12-03 | 中车南京浦镇车辆有限公司 | Welding deformation adjusting and repairing tool for cross beam of circular tubular framework |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007185663A (en) * | 2006-01-11 | 2007-07-26 | Jfe Koken Corp | Internal clamp device |
| JP2010089157A (en) * | 2008-10-10 | 2010-04-22 | Kitagawa Iron Works Co Ltd | Chuck device used for friction welding machine |
| CN201824082U (en) * | 2010-08-31 | 2011-05-11 | 四川蓝星机械有限公司 | Adjustable tensioning ring |
| CN202291789U (en) * | 2011-10-14 | 2012-07-04 | 中冶南方(武汉)威仕工业炉有限公司 | Equally divided inner circularly stretching tool |
| CN202571707U (en) * | 2012-03-21 | 2012-12-05 | 无锡圣贝尔机电有限公司 | Anti-deformation device for cylinder welding |
| CN202667952U (en) * | 2012-06-05 | 2013-01-16 | 西安向阳航天材料股份有限公司 | Tension device of sealing weld lining at pipe end of mechanical bimetallic composite pipe |
-
2013
- 2013-11-19 CN CN201310582173.4A patent/CN103639639B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007185663A (en) * | 2006-01-11 | 2007-07-26 | Jfe Koken Corp | Internal clamp device |
| JP2010089157A (en) * | 2008-10-10 | 2010-04-22 | Kitagawa Iron Works Co Ltd | Chuck device used for friction welding machine |
| CN201824082U (en) * | 2010-08-31 | 2011-05-11 | 四川蓝星机械有限公司 | Adjustable tensioning ring |
| CN202291789U (en) * | 2011-10-14 | 2012-07-04 | 中冶南方(武汉)威仕工业炉有限公司 | Equally divided inner circularly stretching tool |
| CN202571707U (en) * | 2012-03-21 | 2012-12-05 | 无锡圣贝尔机电有限公司 | Anti-deformation device for cylinder welding |
| CN202667952U (en) * | 2012-06-05 | 2013-01-16 | 西安向阳航天材料股份有限公司 | Tension device of sealing weld lining at pipe end of mechanical bimetallic composite pipe |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106141754A (en) * | 2015-04-09 | 2016-11-23 | 哈尔滨建成集团有限公司 | A kind of special fixture processing connection steel band assembly |
| CN105414875A (en) * | 2016-01-11 | 2016-03-23 | 株洲华盛实业有限公司 | Railway straight tank, cylinder docking adjustor of V-shaped tank and cylinder docking method |
| CN105856099A (en) * | 2016-04-29 | 2016-08-17 | 宿州市冠星金属制品制造有限公司 | Stable and adjustable clamp for steel belts |
| CN105923233A (en) * | 2016-04-29 | 2016-09-07 | 宿州市冠星金属制品制造有限公司 | Support-free steel-belt-adjustable fixture |
| CN106425256B (en) * | 2016-11-23 | 2018-01-23 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of two-way positioning thin-wall part weld jig |
| CN106425256A (en) * | 2016-11-23 | 2017-02-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Bidirectional location thin-walled workpiece welding clamp |
| CN106425273A (en) * | 2016-12-23 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Annular welding seam supporting clamp used for thin-wall cylindrical part machining |
| CN107617989A (en) * | 2017-09-29 | 2018-01-23 | 苏州海陆重工股份有限公司 | Pin-connected panel holds round frock |
| CN107617989B (en) * | 2017-09-29 | 2023-10-13 | 苏州海陆重工股份有限公司 | Assembled circle supporting tool |
| CN108838612A (en) * | 2018-09-05 | 2018-11-20 | 中国航发动力股份有限公司 | A kind of large diameter thin wall case weld boss anti-deformation device |
| CN112371776A (en) * | 2020-10-22 | 2021-02-19 | 中国航发贵州黎阳航空动力有限公司 | Vacuum thermal sizing die and method for engine support case |
| CN113102561A (en) * | 2021-03-03 | 2021-07-13 | 山西汾西重工有限责任公司 | Shape correcting device |
| CN113732115A (en) * | 2021-10-11 | 2021-12-03 | 中车南京浦镇车辆有限公司 | Welding deformation adjusting and repairing tool for cross beam of circular tubular framework |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103639639B (en) | 2016-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103639639A (en) | Thin-walled cylinder body welding and shaping clamp | |
| CN202824715U (en) | Internal expanding clamp | |
| CN103639247B (en) | The hot school of a kind of titanium alloy thin wall tube shape component clamp | |
| CN102441809A (en) | Rough turning fixture for cylinder jacket | |
| CN203471397U (en) | Gear milling clamp of thin wall member | |
| CN210280724U (en) | Novel clamp for turning thin-wall excircle | |
| CN205218620U (en) | Steel pipe cutting jig | |
| CN203209898U (en) | Welding tool of exhaust manifold | |
| CN105290678A (en) | Flexible combined clamp for crane welding | |
| CN203509624U (en) | Four-way pipe joint clamp | |
| CN203509697U (en) | Numerical control turning locating tool of oil cylinder assembly | |
| CN102430847B (en) | Automatic welding fixture for longitudinal seam welding of small-diameter thick-walled tube blanks | |
| CN215903009U (en) | Minor diameter thin wall pipe non-full weld fillet weld internal stay frock | |
| CN202479835U (en) | Supporting clamp for machining thin-walled workpiece | |
| CN203343667U (en) | Positioning element with spherical end head | |
| CN203076866U (en) | Press fitting device for steering device gear shaft and torsion bar | |
| CN203184899U (en) | Cylindrical-workpiece side-wall part welding device | |
| CN203253961U (en) | Barrel trolley clamp | |
| CN217393368U (en) | Internal expansion type shape correction tool | |
| CN106239190B (en) | Inwall processing tooling | |
| CN211924362U (en) | Transition flange of high-pressure oil pump | |
| CN220943844U (en) | Detachable positioning tool for assembling cylindrical workpiece | |
| CN203945064U (en) | A kind of welding fixture | |
| CN212265244U (en) | Clamp for machining bearing pedestal | |
| CN111805165B (en) | Semi-closed cabin welding internal stay frock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jin Xiaochuan Inventor after: Liu Jian Inventor after: Chen Kaiqing Inventor after: Wang Qu Inventor before: Jin Xiaochuan Inventor before: Liu Jian Inventor before: Chen Kaiqing Inventor before: Wang Qu |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Xindu District of Chengdu city in Sichuan province 610503 Shulong avenue into the industrial park into a technology center Patentee after: China Hangfa aviation Polytron Technologies Inc Address before: Xindu District of Chengdu city in Sichuan province 610503 Shulong avenue into the industrial park into a technology center Patentee before: Sichuan Chengfa Aviation Science & Technology Co., Ltd. |