CN102773583B - Circular tube welding device - Google Patents
Circular tube welding device Download PDFInfo
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- CN102773583B CN102773583B CN201210309885.4A CN201210309885A CN102773583B CN 102773583 B CN102773583 B CN 102773583B CN 201210309885 A CN201210309885 A CN 201210309885A CN 102773583 B CN102773583 B CN 102773583B
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- welding
- pipe
- driving wheel
- welding gun
- power source
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- 238000003466 welding Methods 0.000 title claims abstract description 147
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 150000001721 carbon Chemical class 0.000 description 4
- 210000000481 breast Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a circular tube welding device which comprises a support seat, two support wheels which are fixed on the support seat and used for supporting a circular tube, a driving wheel used for supporting the circular tube and driving the circular tube to rotate, a power source used for driving the driving wheel to rotate, a welding gun used for welding and a control unit used for controlling the starting and finishing moments of the welding gun and the running parameters of the power source, wherein the axes of the driving wheel, the circular tube and the support wheels are parallel to one another, but are not positioned on the same plane. Furthermore, the circular tube welding device also comprises a carbon brush electrically connected with the driving wheel, wherein the carbon brush and the welding gun are respectively connected with a positive pole and a negative pole of a power supply; and the driving wheel is concretely a conductive wheel. Compared with the manual welding in the prior art, the circular tube welding device adopting the structure reduces the labor intensity and greatly improves the welding quality of the circular tube on the basis of improving the working efficiency.
Description
Technical field
The present invention relates to field of welding devices, particularly a kind of pipe welding equipment.
Background technology
At present, the circumference soldering of pipe adopts manual welding usually, now for the plug welding pipe both sides, concrete welding process is described:
The first step, the hand-held pipe of operator put into holddown groove inner position;
Second step, pin step on welding machine floor push to start welding machine;
After 3rd step, welding machine start, operator's hand is pinched pipe and is rotated a circle, and completes the welding of one end plug;
4th step, in like manner, repeats the welding that above-mentioned steps can complete pipe other end plug.
The mode of above-mentioned manual welding pipe two ends plug is adopted to there is following problem:
1. ensure the principal element of pipe welding quality: striking and receive the arc time, weld interval and action bars rotary speed by Artificial Control, like this, the inconsistency of weldment surface and quality certainly will be caused, thus cause the problem that repair for 2nd time rate is high;
2. show according to test data, having welded a pipe required time is about 30 seconds, inefficiency;
3. labour intensity is large.
In view of this, urgently for the Optimal Structure Designing of existing pipe bonding machine, to solve the of poor quality and operator's inefficiency of the weldment caused because of manual control factor in prior art, problem that labour intensity is large.
Summary of the invention
For above-mentioned defect, the technical problem of solution of the present invention is, provides the pipe welding equipment that a kind of structure optimization controls automatically, thus has increased substantially the welding quality of pipe reducing on labor strength, the basis of increasing work efficiency.
Pipe welding equipment provided by the invention, comprising: supporting seat and be fixed on described supporting seat:
Two support wheels, for supporting pipe;
Driving wheel, supports described pipe and drives it to rotate, and being configured to: the axis being parallel of described driving wheel, described pipe and described support wheel and not coplanar;
Power source, drives described driving wheel to rotate;
For the welding gun of welding;
Control unit, for controlling startup and the finish time of welding gun, and the running parameter of described power source.
Preferably, also comprise the carbon brush be electrically connected with described driving wheel, described carbon brush is connected with power positive cathode respectively with described welding gun, and described driving wheel is specially conductive casters.
Preferably, described welding gun can move along the axis direction being parallel to described driving wheel, to adapt to the welding of different length pipe.
Preferably, described control unit is by changing the rotating speed of described power source to adapt to the welding of different all Circular Pipes.
Preferably, described control unit exports the signal controlling welding gun and start, after time delay certain hour, export the signal controlling described power source work, after described pipe rotates one week, export the signal controlling described power source and stop, again after time delay certain hour, export the signal controlling described welding gun and stop.
Preferably, also comprise axial right baffle-plate and right baffle plate, both are arranged symmetrically with relative to described supporting seat.
Preferably, described welding gun is specially multiple, and sets gradually along the axis direction being parallel to described driving wheel.
Preferably, also comprise welding gun fixed block, described welding gun fixed block be arranged on described supporting seat with described welding gun correspondence position; Described welding gun fixed block specifically comprises the bottom and support portion that are arranged at described supporting seat, and upper end, described support portion offers " U " font groove, and described welding gun inserts in described " U " font groove.
Preferably, the described supporting seat left and right wing plate that comprises base plate, left socle, right support and extended to form laterally by described left socle and described right support respectively; Wherein, two described support wheels are fixed on on the fixing fixed axis of described left socle and described right support upper end, two described driving wheels are fixed on the driving shaft that is placed between described left socle and described right support, and the below of installing described driving wheel on described left socle and described right support is oppositely arranged installing hole.
Preferably, also comprise tumbler, described transmission device is placed between described power source and described driving shaft.
Preferably, the mount pad for fixing described power source and described transmission device is also comprised.
The invention provides a kind of pipe welding equipment, comprise: supporting seat and the welding gun be fixed on supporting seat and for two support wheels supporting pipe and driving wheel, this driving wheel promotes pipe by frictional force under the power source on supporting seat drives and rotates being fixed on, in order to ensure driving wheel, the axis being parallel of support wheel and pipe three and not coplanar when reaching the assembling of above-mentioned technique effect.In order to reduce in welding process human factor further to the impact of product quality, the present invention also comprises control unit, this control unit is by controlling startup and the finish time of welding gun, and power source running parameter, be completely free of in welding process human factor to the factor affecting welding quality: the impact of rotating speed of receiving arc time, striking time, weld interval and pipe.Therefore, compared with prior art, the present invention, by above-mentioned mechanical mechanism and control unit, not only reduces the labour intensity of workman, increases work efficiency, and significantly improve the welding quality of pipe.
In preferred version of the present invention, also comprise the carbon brush be electrically connected with driving wheel, and this carbon brush is connected with the both positive and negative polarity of welding gun respectively at power supply, wherein, driving wheel is specially conductive casters.During the work of this welding equipment, power source drives driving wheel that pipe is rotated a circle, and makes power positive cathode form loop, complete welding by the connection of pipe, driving wheel and carbon brush.Above-mentioned design avoids when pipe is not yet placed between driving wheel and support wheel, starts welding gun welding and the potential safety hazards such as the breaking out of fire that causes, thus ensure that this welding equipment job security and reliability due to maloperation opening device power supply.
In another preferred version of the present invention, welding gun can move along the axis direction being parallel to driving wheel, to realize the welding of different length pipe, in addition, the rotating speed being changed described power source by control unit realizes different all Circular Pipe welding, certainly, by adopting the pipe welding that can realize the different girth of different length in two ways simultaneously, thus the scope of application of this equipment has been expanded.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of technical scheme in specific embodiment;
Fig. 2 shows the front view of Fig. 1;
Fig. 3 shows the top view of Fig. 1;
Fig. 4 shows the left view of Fig. 1;
Fig. 5 shows the control flow chart of control unit in specific embodiment in Fig. 1;
Fig. 6 shows the exploded perspective view of carbon brush in Fig. 1.
In figure:
1 supporting seat, 11 base plates, 12 left socles, 13 right supports, 14 left wing plates, 15 right wing plates, 16 motor installing holes, 2 welding guns, 21 left welding gun holders, bottom 211, 212 gripper shoes, 213 " U " font groove, 31 first support wheels, 32 second support wheels, 33 fixed heads, 34 fixed axis, 4 driving wheels, 41 driving shafts, 42 flanges, 5 stepper motors, 6 pipes, 7 mount pads, bottom 71, 72 support portions, 81 driving wheels, 82 driven pulleys, 83 breast wheels, 9 carbon brush, 91 carbon brush holders, 92 screws, 93 fixed bars, 101 right baffle plates, 1011 base plates, 1012 gripper shoes.
Detailed description of the invention
Core of the present invention is to provide a kind of pipe welding equipment, the factor of welding quality is affected: striking time, receipts arc time, weld interval and pipe rotating speed etc. all adopt and automatically control, thus have increased substantially the welding quality of pipe while reduction labor strength after applying the pipe welding equipment of this structure.
Without loss of generality, illustrate below in conjunction with Figure of description, in the present invention, pipe welding equipment is for welding the detailed description of the invention that external diameter is ￠ 12mm pipe two ends plug.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, wherein, Fig. 1 shows the schematic diagram of technical scheme in specific embodiment, Fig. 2 shows the front view of Fig. 1, Fig. 3 shows the top view of Fig. 1, Fig. 4 shows the left view of Fig. 1, and Fig. 5 shows the control flow chart of control unit in specific embodiment in Fig. 1.
As shown in Figure 1, the pipe welding equipment that this programme provides comprises: supporting seat 1 and be fixed on supporting seat 1 for implement to weld welding gun 2, for support and the first support wheel 31 of the pipe 6 that leads and the second support wheel 32, for supporting pipe 6 and the driving wheel 4 driving it to rotate, and for driving the power source of this driving wheel and controlling startup and the finish time of welding gun and the control unit of power source parameter.Wherein, the axis being parallel of driving wheel 4, two support wheels and pipe 6 three and not coplanar.
It should be noted that, the power source in this programme is specially stepper motor 5, and when meeting above-mentioned functions and requiring, this power source can adopt other any known modes.
Existing composition graphs 5 illustrates the pipe welding equipment of said structure, for welding the concrete control flow of pipe 6 two ends plug:
1. pipe 6 is placed between two support wheels and driving wheel 4;
2. pushbutton enable, controls the relay work of welding equipment;
3. welding gun 2 starts striking, and after postponing 10ms, stepper motor 5 is started working, and drives driving wheel 4, makes it drive pipe 6 to rotate;
4. after 480000 burst transmissions set in control unit program complete, stepper motor 5 quits work, and now pipe 6 rotates one week just;
5. welding gun 2 starts to receive arc, and after postponing 10ms, welding gun 2 quits work, and welding terminates.
Compared with manual welding pipe of the prior art, the present invention by drive the mechanism that automatically rotates of pipe and in program, set the striking time by control unit, receive the arc time, the rotating speed of weld interval and pipe, to be completely free of in welding process human factor to the impact of pipe welding quality.Therefore, this programme not only reduce workman labour intensity, increase work efficiency, and significantly improve the welding quality of pipe.It should be noted that, the striking set in this programme and receipts arc time are 10ms, and the concrete time is determined by concrete weld task, and certainly, the striking time also can not be identical with the receipts arc time.
Supporting seat in the present invention is mainly used in the mechanism carrying the driving wheel, support wheel, power source and the control unit that drive pipe to rotate, and its concrete structure is determined in conjunction with concrete condition in workshop, and the basis meeting bearing function can be designed to arbitrary structures.Supporting seat 1 concrete structure in this programme comprises base plate 11, left socle 12, right support 13 and the left wing plate 14 extended to form laterally by left socle 12 and right support 13 respectively and right wing plate 15, wherein, a fixed axis 34 is provided with between left socle 12 and right support 13, the two ends of this fixed axis 34 be welded in be fixed on pedestal upper end face, left and right fixed head 33 on, aforesaid two support wheels and this fixed axis 34 tight fit.In addition, one driving shaft 41 parallel with this fixed axis 34 is also set between left socle 12 and right support 13, the two ends of this driving shaft are stretched out by the dead eye being opened in left and right support relative position, coordinated by deep groove ball bearing between this hole and driving shaft, driving shaft can be rotated in dead eye, and bearing is fixed on the support of left and right by end cap.Aforementioned driving wheel 4 is specially two in this programme, is connected and fixed by key with driving shaft 41.
Further, only driving wheel is driven to rotate in order to realize stepper motor, stepper motor 5 in the present invention can be connected directly between the drive shaft end for fixed drive wheel, but in order to ensure the harmony of the reliability that stepper motor is installed and whole pipe welding equipment structure, this programme also comprises the mount pad 7 for installing stepper motor 5, this mount pad 7 comprises and is fixed on the bottom 71 on the base plate 11 of supporting seat 1 and the support portion 72 perpendicular to bottom 71 by screw, its right end face of this support portion 72 extends to form an installation shaft (not shown).Aforementioned stepper motor 5 is fixed by screws in the left end face of support portion 72 through the installing hole 16 be positioned on left socle 12 below driving wheel 4, and its main shaft is stretched out by the locating hole (not shown) of corresponding position, support portion 72.
It is emphasized that in this programme, stepper motor 5 is installed on below left socle 12, certainly, is installed on correspondence position on right support 13, also can reach the technique effect that this programme will reach.A driving shaft can also be only included in this programme, be located at the technique effect that can realize equally between two support wheels driving pipe 6 to rotate.
In addition, in order to ensure that operator can work in the most time saving and energy saving mode in welding process in the present invention, and meet ergonomic designs, between the holder 7 of stepper motor 5 and enforcement welding portion structure, there is difference in height, therefore, in order to the rotation of stepper motor 5 is passed to driving wheel 4, in this programme, have also been devised drive disk assembly.This drive disk assembly is specially the identical straight spur gear of three parameters, driving wheel 81 is connected with the main shaft key of stepper motor 5, driven pulley 82 and driving shaft 41 key are connected and fixed, breast wheel 83 is set between driving wheel 81 and driven pulley 82, this breast wheel 83 and installation shaft tight fit on the mount pad 7 on support portion 72.When stepper motor 5 works, the rotation of its main shaft is passed to successively by above-mentioned three gears on the driving shaft 41 of fixed drive wheel, it is made to drive driving wheel 4 to rotate, because driving wheel in this programme 4 surface is through annular knurl process, drive pipe 6 rotates by its frictional force produced in rotary course, thus achieves the automatic rotation of pipe 6 in welding process.
Refer to Fig. 6, Fig. 6 shows the exploded perspective view of carbon brush in Fig. 1.This carbon brush 9 cover is loaded in carbon brush holder 91, the lower surface of this carbon brush holder 91 is welded on the fixed bar 93 that is fixed between the support of left and right, this fixed bar 93 arranges threaded two ends and stretches out from the installing hole of relative position left socle 12 and right support 13, and is bolted between the support of left and right.In this programme, screw 92 is penetrated by the screwed hole being positioned at carbon brush holder 91 upper end, then pocketed springs on this screw, after carbon brush 9 loads carbon brush holder 91, the thrust of spring makes the flange 42 of itself and driving wheel 4 fit tightly, thus when driving wheel 4 rotates and carbon brush 9 produce sliding friction.In addition, this carbon brush 9 is connected with the both positive and negative polarity of aforementioned welding gun 2 respectively at this equipment, and during the work of this welding equipment, stepper motor 5 drives driving wheel 4 that pipe 6 is rotated a circle, make power positive cathode form loop by the connection of pipe 6, driving wheel 4 and carbon brush 9, complete welding.Above-mentioned design avoid pipe 6 not yet accurately time, start welding gun welding due to maloperation opening device power supply and the potential safety hazards such as the breaking out of fire that causes, thus ensure that this welding equipment job security and reliability.
In order to weld the plug at pipe two ends simultaneously in this programme, aforementioned welding gun 2 is specially two, in order to fixing welding gun 2 this programme have also been devised two welding gun fixed blocks, now for left welding gun fixed block 21, its concrete structure is described.Left welding gun fixed block specifically comprises and is arranged at the bottom 211 on the left wing plate 14 of supporting seat 1 and the support portion 212 perpendicular to bottom 211, and the upper end of this support portion 212 offers " U " font groove 213, and welding gun 2 inserts this groove internal fixtion.
It should be noted that, when adopting the welding equipment of this programme structure to weld the pipe of different girth, in order to ensure that welding gun is positioned at optimum welding position, welding gun can slide in " U " font groove 213 of welding gun fixed block 21.Certainly, as long as can ensure the adjustment of welding torch position and fixing, this welding gun fixed block can also adopt other version.
Further, in order to realize the welding of different length pipe in this programme, above-mentioned welding gun fixed block, by being fixed on along diverse location in multiple installing holes of driving wheel axis direction setting, realizes the adjustment of welding torch position.Certainly, also on the wing plate of left and right, chute can be set along driving wheel axis direction, welding gun fixed block be slided in this chute and adjusts its position, the known any-mode of other those skilled in that art can also be adopted.
In addition, in order to complete the welding of different all Circular Pipes, the control unit in this programme is realized by the rotating speed adjusting stepper motor.Such as, adopt welding equipment in this programme, complete the welding that diameter is ￠ 12mm pipe, the pulse of stepper motor is 480000; Complete the pipe welding that diameter is ￠ 14mm, the pulse of stepper motor is 560000.It is emphasized that in this programme, pipe welding equipment, except welding except the pipe of different size, also can realize the welding of different in width and degree of depth welding position, the rotating speed mainly by adjusting stepper motor realizes.The rotating speed of stepper motor determines primarily of external diameter two factors of pipe and driving wheel, due to this computing formula not inventive point of the present invention, does not therefore repeat them here.
Adopt in the process of this programme welding pipe, may cause pipe play axially, for this reason, the present invention is provided with right baffle-plate 101 and right baffle plate on the wing plate of left and right, now for right baffle-plate 101, its concrete structure is described.Right baffle-plate is specially "L" shaped, and its base plate 1011 is fixed on left wing plate 14, and an end face of gripper shoe 1012 and the left side of pipe 6 offset.Certainly, in order to realize the welding of different length pipe, the position of this baffle plate on wing plate is adjustable.The mode identical with welding gun fixed block specifically can be adopted to adjust, do not repeat them here.
In order to increase work efficiency further, this programme provides constructive suggestions with regard to the layout type of this welding equipment in welder room.The automation rotary tooling driven by stepper motor, be placed on respectively on two, same welder room welding post, every secondary frock can be installed two welding guns, operative employee is placed on pipe on rotary tooling, after pressing start button, equipment completes the welding on pipe plug both sides automatically.While this root is by equipment automatic welding, same operative employee can complete the assembling of another root pipe on another one station, and etc. to be welded.
The foregoing is only the preferred embodiment of the present invention, do not form limiting the scope of the present invention.Any any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (9)
1. a pipe welding equipment, is characterized in that, comprises supporting seat and is fixed on described supporting seat:
Two support wheels, for supporting pipe;
Driving wheel, supports described pipe and drives it to rotate, and being configured to: the axis being parallel of described driving wheel, described pipe and described support wheel and not coplanar;
Power source, drives described driving wheel to rotate;
For the welding gun of welding, described welding gun is specially multiple, and sets gradually along the axis direction being parallel to described driving wheel;
Control unit, for controlling startup and the finish time of welding gun, and the running parameter of described power source;
Also comprise the carbon brush be electrically connected with described driving wheel, described carbon brush is connected with power positive cathode respectively with described welding gun, and wherein, described driving wheel is specially conductive casters.
2. pipe welding equipment according to claim 1, is characterized in that, described welding gun can move along the axis direction being parallel to two described driving wheels, to adapt to the welding of different length pipe.
3. pipe welding equipment according to any one of claim 1 to 2, is characterized in that, described control unit is by changing the rotating speed of described power source to adapt to the welding of different all Circular Pipes.
4. pipe welding equipment according to claim 3, it is characterized in that, described control unit exports the signal controlling welding gun and start, after time delay certain hour, export the signal controlling described power source work, after described pipe rotates one week, export the signal controlling described power source and stop, again after time delay certain hour, export the signal controlling described welding gun and stop.
5. pipe welding equipment according to claim 4, is characterized in that, also comprise axial right baffle-plate and right baffle plate, both are arranged symmetrically with relative to described supporting seat.
6. pipe welding equipment according to claim 5, is characterized in that, also comprises welding gun fixed block, described welding gun fixed block be arranged on described supporting seat with described welding gun correspondence position; Described welding gun fixed block specifically comprises the bottom and support portion that are arranged at described supporting seat, and upper end, described support portion offers " U " font groove, and described welding gun inserts in described " U " font groove.
7. pipe welding equipment according to claim 6, is characterized in that, the left and right wing plate that described supporting seat comprises base plate, left socle, right support and extended to form laterally by described left socle and described right support respectively; Wherein, two described support wheels are fixed on on the fixing fixed axis of described left socle and described right support upper end, two described driving wheels are fixed on the driving shaft that is placed between described left socle and described right support, and the below of installing described driving wheel on described left socle and described right support is oppositely arranged installing hole.
8. pipe welding equipment according to claim 7, is characterized in that, also comprise transmission device, and described transmission device is placed between described power source and described driving shaft.
9. pipe welding equipment according to claim 8, is characterized in that, also comprises the mount pad of fixing described power source and described transmission device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309885.4A CN102773583B (en) | 2012-08-28 | 2012-08-28 | Circular tube welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309885.4A CN102773583B (en) | 2012-08-28 | 2012-08-28 | Circular tube welding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102773583A CN102773583A (en) | 2012-11-14 |
| CN102773583B true CN102773583B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210309885.4A Expired - Fee Related CN102773583B (en) | 2012-08-28 | 2012-08-28 | Circular tube welding device |
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| Country | Link |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2868526Y (en) * | 2006-01-20 | 2007-02-14 | 戴煜 | Heat pipe sealing head welding device |
| CN102189347A (en) * | 2011-05-25 | 2011-09-21 | 东莞市隆泰实业有限公司 | Method and system for machining large-diameter rotary drum |
| CN202804436U (en) * | 2012-08-28 | 2013-03-20 | 湖北中航精机科技股份有限公司 | Circular tube welding device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101270030B1 (en) * | 2010-08-20 | 2013-05-31 | (주)지이씨 | Integrated controled automatic pipe welding apparatus and control method thereof |
-
2012
- 2012-08-28 CN CN201210309885.4A patent/CN102773583B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2868526Y (en) * | 2006-01-20 | 2007-02-14 | 戴煜 | Heat pipe sealing head welding device |
| CN102189347A (en) * | 2011-05-25 | 2011-09-21 | 东莞市隆泰实业有限公司 | Method and system for machining large-diameter rotary drum |
| CN202804436U (en) * | 2012-08-28 | 2013-03-20 | 湖北中航精机科技股份有限公司 | Circular tube welding device |
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| CN102773583A (en) | 2012-11-14 |
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Inventor after: Guo Mingjun Inventor after: Duan Xiangrui Inventor after: Wang Lijun Inventor after: Zhang Changjun Inventor before: Duan Xiangrui Inventor before: Guo Mingjun |
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Owner name: HUBEI AVIATION PRECISION MACHINERY TECHNOLOGY CO., Free format text: FORMER OWNER: ZHONGHANG PRECISIVE MACHINARY SCIENCE AND TECHNOLOGY CO., LTD., HUBEI Effective date: 20130619 |
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Effective date of registration: 20130619 Address after: 441003 Hubei city of Xiangfan province high tech Zone, Road No. 8 Applicant after: HUBEI AVIATION PRECISION MACHINERY TECHNOLOGY Co.,Ltd. Address before: Xiangyang City, Hubei Province, 441003 Road No. 8 Applicant before: HUBEI AVIATION PRECISION MACHINERY TECHNOLOGY Co.,Ltd. |
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