CN101972890A - Servo direct-drive double-acting multifunctional friction welding machine - Google Patents
Servo direct-drive double-acting multifunctional friction welding machine Download PDFInfo
- Publication number
- CN101972890A CN101972890A CN 201010504264 CN201010504264A CN101972890A CN 101972890 A CN101972890 A CN 101972890A CN 201010504264 CN201010504264 CN 201010504264 CN 201010504264 A CN201010504264 A CN 201010504264A CN 101972890 A CN101972890 A CN 101972890A
- Authority
- CN
- China
- Prior art keywords
- fuselage
- chuck
- friction welding
- motor
- fixed
- 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.)
- Pending
Links
Images
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
本发明公开了一种伺服直驱双动多功能摩擦焊机，其采用两个交流伺服电动机直接驱动的驱动方式。在床身上安装了角度检测和感应加热装置。本发明将一个交流伺服电动机与固定夹具座相连并固定在床身和固定电机架之上，另一个交流伺服电动机与移动夹具座及液压缸相连并安装于导轨上，由于采用了交流伺服电动机，可以通过其正反转来达到焊接时高转速、高功率的要求，不仅解决了现有摩擦焊机不能准确调速的矛盾，且可以节能、效率高。本发明通过角度检测装置解决了焊接件形状单一的缺点，同时采用感应加热装置能够对焊接前后进行热处理和预加热。本发明只需在导轨中间安装一夹具，便可改造为一种高效的相位双头摩擦焊机。
The invention discloses a servo direct-drive double-action multi-functional friction welding machine, which adopts a drive mode directly driven by two AC servo motors. Angle detection and induction heating devices are installed on the bed. In the present invention, one AC servo motor is connected with the fixed fixture seat and fixed on the bed and the fixed motor frame, and the other AC servo motor is connected with the movable fixture seat and the hydraulic cylinder and installed on the guide rail. Since the AC servo motor is adopted, The requirements of high rotation speed and high power during welding can be achieved through its forward and reverse rotation, which not only solves the contradiction that the existing friction welding machine cannot adjust the speed accurately, but also saves energy and has high efficiency. The invention solves the shortcoming of the single shape of the welded part through the angle detection device, and at the same time adopts the induction heating device to perform heat treatment and preheating before and after welding. The present invention can be transformed into a high-efficiency phase double-head friction welding machine only by installing a fixture in the middle of the guide rail.
Description
技术领域technical field
本发明属于焊接设备技术领域，涉及一种摩擦焊机，尤其是一种伺服直驱双动多功能摩擦焊机。The invention belongs to the technical field of welding equipment, and relates to a friction welding machine, in particular to a servo direct-drive double-action multifunctional friction welding machine.
背景技术Background technique
摩擦焊接是固态焊接方法之一，摩擦焊接以其优质、高效、节能、无污染、工艺适应性广等特点，深受制造业的重视，在航空、航天、核能、海洋开发等高技术领域及电力、机械制造、石油钻探、汽车制造等产业部门一直有着广泛的应用。目前，在生产中使用的摩擦焊机基本都是使用三相交流异步电动机驱动，摩擦焊机的主轴结构复杂，因离合与制动装置的刹车油缸和旋转夹具的旋转油缸均在旋转主轴上布置，致使主轴的惯性大，结构复杂、加工成本高液压系统结构庞大、占地面积大。并且当前摩擦焊机多为一部电机驱动，不能够达到高转速、高功率及准确调速的要求，且焊接的零件的外形比较单一，不能够对焊接过程进行热处理和预加热。这些都使得设备运行浪费能源，整体结构变得复杂，稳定性降低，质量体积庞大，维护也变得复杂。Friction welding is one of the solid-state welding methods. Due to its high quality, high efficiency, energy saving, no pollution, and wide process adaptability, friction welding is highly valued by the manufacturing industry. It is used in high-tech fields such as aviation, aerospace, nuclear energy, and ocean development. It has been widely used in industries such as electric power, machinery manufacturing, oil drilling, and automobile manufacturing. At present, the friction welding machines used in production are basically driven by three-phase AC asynchronous motors. The main shaft structure of the friction welding machine is complex, because the brake cylinder of the clutch and braking device and the rotating oil cylinder of the rotating fixture are arranged on the rotating main shaft. , resulting in large inertia of the main shaft, complex structure and high processing cost. The hydraulic system has a large structure and a large footprint. Moreover, most of the current friction welding machines are driven by a motor, which cannot meet the requirements of high speed, high power and accurate speed regulation, and the shape of the welded parts is relatively simple, so it is impossible to perform heat treatment and preheating for the welding process. All of these make the operation of the equipment waste energy, the overall structure becomes complicated, the stability is reduced, the mass is bulky, and the maintenance becomes complicated.
发明内容Contents of the invention
本发明的目的在于克服上述现有技术的缺点，提供一种伺服直驱双动多功能摩擦焊机，该摩擦焊机采用了两个伺服电动机，实现焊接过程中高转速、高功率的要求，有助于解决现有摩擦焊机不能准确调速的矛盾，节能和提高效率。The purpose of the present invention is to overcome the above-mentioned shortcoming of prior art, provide a kind of servo direct-drive double-action multifunctional friction welding machine, this friction welding machine adopts two servo motors, realizes the requirement of high speed, high power in the welding process, has It helps to solve the contradiction that the existing friction welding machine cannot adjust the speed accurately, saves energy and improves efficiency.
本发明的目的是通过以下技术方案来解决的：The purpose of the present invention is solved by the following technical solutions:
这种伺服直驱双动多功能摩擦焊机，包括机身以及设置在机身上的双电机摩擦焊接机构，所述双电机摩擦焊接机构包括相对设置在机身两端的固定电机焊接机构和滑动电机焊接机构，所述机身上设有滑轨和移动机架，所述滑动电机焊接机构固定在移动机架上，所述移动机架安装在滑轨上，所述移动机架与机身之间设有液压缸；所述固定电机焊接机构通过固定电机架设置在机身一端，且固定电机焊接机构包括依次连接的第一伺服电机、第一减速机、第一相位检测头和第一卡盘；所述滑动电机焊接机构包括依次连接的第二伺服电机、第二减速机、第二相位检测头和第二卡盘；所述第一卡盘和第二卡盘同轴线相对设置，且在第一卡盘和第二卡盘之间设置有感应加热装置。This servo direct-drive double-action multifunctional friction welding machine includes a fuselage and a dual-motor friction welding mechanism arranged on the fuselage. The dual-motor friction welding mechanism includes fixed motor welding mechanisms and sliding Motor welding mechanism, the fuselage is provided with a slide rail and a mobile frame, the sliding motor welding mechanism is fixed on the mobile frame, the mobile frame is installed on the slide rail, the mobile frame and the fuselage A hydraulic cylinder is arranged between them; the fixed motor welding mechanism is arranged at one end of the fuselage through the fixed motor frame, and the fixed motor welding mechanism includes a first servo motor, a first reducer, a first phase detection head and a first chuck; the sliding motor welding mechanism includes a second servo motor, a second reducer, a second phase detection head and a second chuck connected in sequence; the first chuck and the second chuck are arranged opposite to each other , and an induction heating device is provided between the first chuck and the second chuck.
上述移动机架的后端连接所述液压缸的活塞杆伸出端，所述液压缸的缸体固定在机身的一端。The rear end of the mobile frame is connected to the piston rod extension end of the hydraulic cylinder, and the cylinder body of the hydraulic cylinder is fixed at one end of the fuselage.
上述第一相位检测头和第二相位检测头是旋转角度检测器。The first phase detection head and the second phase detection head described above are rotation angle detectors.
上述第一伺服电机(2)和第二伺服电机(10)是交流伺服电动机。The above-mentioned first servo motor (2) and second servo motor (10) are AC servo motors.
本发明具有以下有益效果：The present invention has the following beneficial effects:
1)本发明采用伺服电动机直接驱动的驱动方式代替原来的通过三相交流异步电动机带动离合器的驱动方式。由于没有了离合器，使得当设备停止工作时，电机不必再空转而消耗能源。同时由于伺服电机本身有十分优良的调速性能，这便使得原来结构中的变速齿轮机构被简化为固定传动比的减速齿轮机构，实现了一定范围内的无级调速，从而改善了设备的工作性能。1) The present invention adopts the drive mode directly driven by the servo motor to replace the original drive mode in which the clutch is driven by the three-phase AC asynchronous motor. Because there is no clutch, when the equipment stops working, the motor does not need to idle and consume energy. At the same time, due to the excellent speed regulation performance of the servo motor itself, the speed change gear mechanism in the original structure is simplified to a reduction gear mechanism with a fixed transmission ratio, which realizes stepless speed regulation within a certain range, thereby improving the efficiency of the equipment. work performance.
2)本发明减少了现有技术的离合器和变速齿轮机构，提高了系统工作的稳定性。采用两个交流伺服电动机一个交流伺服电机正转，一个交流伺服电机反转，在保证电机功率较高，又可保证高的相对转速。2) The present invention reduces the clutch and transmission gear mechanism of the prior art, and improves the stability of the system work. Two AC servo motors are used, one AC servo motor rotates forward and the other AC servo motor rotates reversely, so as to ensure high motor power and high relative speed.
3)本发明在摩擦焊接开始时可以利用感应加热装置对焊件进行退火和预加热，以提高焊件的塑性能力和对薄的焊件在保证焊接质量的前提下减少缩短量的要求。而且在摩擦焊接结束时可以利用感应加热装置对焊件进行回火以去除焊件中的焊接应力。3) The present invention can use the induction heating device to anneal and preheat the weldment at the beginning of friction welding, so as to improve the plasticity of the weldment and reduce the shortening amount of the thin weldment under the premise of ensuring the welding quality. And at the end of the friction welding, the induction heating device can be used to temper the weldment to remove the welding stress in the weldment.
附图说明Description of drawings
图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
其中：1为固定电机架；2为第一伺服电机；3为第一减速机；4为第一相位检测头；5为第一卡盘；6为感应加热装置；7为第二卡盘；8为第二相位检测头；9为第二减速机；10为第二伺服电机；11为移动机架；12为滑轨；13为液压缸；14为机身。Among them: 1 is the fixed motor frame; 2 is the first servo motor; 3 is the first reducer; 4 is the first phase detection head; 5 is the first chuck; 6 is the induction heating device; 7 is the second chuck; 8 is the second phase detection head; 9 is the second reducer; 10 is the second servo motor; 11 is the mobile frame; 12 is the slide rail; 13 is the hydraulic cylinder; 14 is the fuselage.
具体实施方式Detailed ways
下面结合附图对本发明做进一步详细描述：The present invention is described in further detail below in conjunction with accompanying drawing:
参见图1，该伺服直驱双动多功能摩擦焊机，包括机身14以及设置在机身14上的双电机摩擦焊接机构，其中双电机摩擦焊接机构包括相对设置在机身14两端的固定电机焊接机构和滑动电机焊接机构。在机身14上设有滑轨12和移动机架11，滑动电机焊接机构固定在移动机架11上，移动机架11安装在滑轨12上，移动机架11与机身14之间设有液压缸13。固定电机焊接机构通过固定电机架1设置在机身14一端，且固定电机焊接机构包括依次连接的第一伺服电机2、第一减速机3、第一相位检测头4和第一卡盘5。滑动电机焊接机构包括依次连接的第二伺服电机10、第二减速机9、第二相位检测头8和第二卡盘7。第一卡盘5和第二卡盘7同轴线相对设置，且在第一卡盘5和第二卡盘7之间设置有感应加热装置6。其中感应加热装置6由环状的加热圈和用于固定加热圈的升降支架组成，其中升降支架的固定杆竖直固定在固定电机架1上，在固定杆上套有滑动套，滑动套通过连接杆将加热圈固定在第一卡盘5和第二卡盘7之间，用于加热被加工的工件。移动机架11的后端连接液压缸13的活塞杆伸出端，液压缸13的缸体固定在机身14的一端。Referring to Fig. 1, this servo direct-drive double-action multifunctional friction welding machine includes a fuselage 14 and a dual-motor friction welding mechanism arranged on the fuselage 14, wherein the dual-motor friction welding mechanism includes fixed Motor welding mechanism and sliding motor welding mechanism. Fuselage 14 is provided with slide rail 12 and mobile frame 11, and sliding motor welding mechanism is fixed on mobile frame 11, and mobile frame 11 is installed on the slide rail 12, and is set between mobile frame 11 and fuselage 14 Hydraulic cylinder 13 is arranged. The fixed motor welding mechanism is arranged on one end of the fuselage 14 through the fixed motor frame 1, and the fixed motor welding mechanism includes a first servo motor 2, a first reducer 3, a first phase detection head 4 and a first chuck 5 connected in sequence. The sliding motor welding mechanism includes a second servo motor 10 , a second reducer 9 , a second phase detection head 8 and a second chuck 7 connected in sequence. The first chuck 5 and the second chuck 7 are coaxially arranged opposite each other, and an induction heating device 6 is arranged between the first chuck 5 and the second chuck 7 . Wherein the induction heating device 6 is composed of a ring-shaped heating ring and a lifting bracket for fixing the heating ring, wherein the fixing rod of the lifting bracket is vertically fixed on the fixed motor frame 1, and a sliding sleeve is set on the fixing rod, and the sliding sleeve passes through The connecting rod fixes the heating ring between the first chuck 5 and the second chuck 7 for heating the workpiece to be processed. The rear end of the mobile frame 11 is connected to the piston rod extension end of the hydraulic cylinder 13 , and the cylinder body of the hydraulic cylinder 13 is fixed on one end of the fuselage 14 .
在本发明的最佳实施例中：上述的第一相位检测头和第二相位检测头是旋转角度检测器。上述的第一伺服电机2和第二伺服电机10采用交流伺服电动机。In a preferred embodiment of the present invention: the above-mentioned first phase detection head and second phase detection head are rotation angle detectors. The first servo motor 2 and the second servo motor 10 mentioned above are AC servo motors.
本发明利用相位角检测装置(第一相位检测头和第二相位检测头)可以对焊件转过的角度进行监控，可以对方形件、六角形件、八角形件较为精确的对中，从而实现焊机可以焊接多种形状焊件的功能。本发明在两夹具中间导轨上预留了安装另一夹具的空间，只需在其间安装另一夹具便可改造为多功能相位双头摩擦焊机。本发明节能、效率高、功能优、使用范围广，可广泛推广使用。The present invention utilizes the phase angle detection device (the first phase detection head and the second phase detection head) to monitor the angle at which the weldment turns, and can accurately center square pieces, hexagonal pieces, and octagonal pieces, thereby Realize the function that the welding machine can weld various shapes of weldments. The present invention reserves a space for installing another fixture on the middle guide rail of the two fixtures, and it can be transformed into a multifunctional phase double-head friction welding machine only by installing another fixture therebetween. The invention has the advantages of energy saving, high efficiency, excellent function and wide application range, and can be widely popularized and used.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010504264 CN101972890A (en) | 2010-10-14 | 2010-10-14 | Servo direct-drive double-acting multifunctional friction welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010504264 CN101972890A (en) | 2010-10-14 | 2010-10-14 | Servo direct-drive double-acting multifunctional friction welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101972890A true CN101972890A (en) | 2011-02-16 |
Family
ID=43572814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010504264 Pending CN101972890A (en) | 2010-10-14 | 2010-10-14 | Servo direct-drive double-acting multifunctional friction welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101972890A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554451A (en) * | 2012-01-19 | 2012-07-11 | 广州市新栋力超声电子设备有限公司 | Bilateral ultrasonic welder |
| CN102717183A (en) * | 2012-07-09 | 2012-10-10 | 哈尔滨正晨焊接切割设备制造有限公司 | Anti-deformation friction welding machine and welding method |
| CN103157901A (en) * | 2013-03-29 | 2013-06-19 | 江苏新创雄铝制品有限公司 | Hub stir friction welding device |
| CN104384704A (en) * | 2014-10-22 | 2015-03-04 | 江苏锐成机械有限公司 | All-electric servo single-head phase friction welding machine |
| CN106270912A (en) * | 2015-05-07 | 2017-01-04 | 苏州安嘉自动化设备有限公司 | The chuck open-and-close mechanism of butt welding machine grip device |
| CN106312290A (en) * | 2016-09-07 | 2017-01-11 | 泉州圆创机械技术开发有限公司 | Bench-type stirring and friction welding equipment |
| CN108608107A (en) * | 2018-05-23 | 2018-10-02 | 江苏科技大学 | A kind of phase friction welding machine and welding method |
| CN111266871A (en) * | 2020-04-01 | 2020-06-12 | 吉林省中赢高科技有限公司 | Novel friction welding equipment and production line |
| CN112222598A (en) * | 2020-09-14 | 2021-01-15 | 湖南坤鼎数控科技有限公司 | Friction welding device with preheating function |
| CN113909669A (en) * | 2020-07-10 | 2022-01-11 | 天乐国际股份有限公司 | Friction bonding machine structure of heat sink |
| CN119634936A (en) * | 2024-11-28 | 2025-03-18 | 中国机械总院集团哈尔滨焊接研究所有限公司 | A friction welding auxiliary processing device for thick-walled annular pipe parts and a working method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247113A (en) * | 1998-09-07 | 2000-03-15 | 株式会社丰田自动织机制作所 | Workpiece jointing method and appst. for connecting same |
| CN1365870A (en) * | 2001-11-15 | 2002-08-28 | 北京航空航天大学 | Induction friction welding method |
| CN1182935C (en) * | 2000-06-02 | 2005-01-05 | 丰田自动车株式会社 | Hollow product, fluid handling system, and connection method for hollow components |
| CN101417367A (en) * | 2007-10-26 | 2009-04-29 | 汉中双戟摩擦焊接制造技术有限责任公司 | 'Two-head' phase control friction-welding machine |
| CN101594964A (en) * | 2006-09-18 | 2009-12-02 | 斯宾达科林焊接有限公司 | Equipment for induction friction solid state welding |
| CN101829854A (en) * | 2010-04-29 | 2010-09-15 | 重庆大学 | Current-carrying inertial radial friction composite welding method and equipment thereof |
-
2010
- 2010-10-14 CN CN 201010504264 patent/CN101972890A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247113A (en) * | 1998-09-07 | 2000-03-15 | 株式会社丰田自动织机制作所 | Workpiece jointing method and appst. for connecting same |
| CN1182935C (en) * | 2000-06-02 | 2005-01-05 | 丰田自动车株式会社 | Hollow product, fluid handling system, and connection method for hollow components |
| CN1365870A (en) * | 2001-11-15 | 2002-08-28 | 北京航空航天大学 | Induction friction welding method |
| CN101594964A (en) * | 2006-09-18 | 2009-12-02 | 斯宾达科林焊接有限公司 | Equipment for induction friction solid state welding |
| CN101417367A (en) * | 2007-10-26 | 2009-04-29 | 汉中双戟摩擦焊接制造技术有限责任公司 | 'Two-head' phase control friction-welding machine |
| CN101829854A (en) * | 2010-04-29 | 2010-09-15 | 重庆大学 | Current-carrying inertial radial friction composite welding method and equipment thereof |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554451A (en) * | 2012-01-19 | 2012-07-11 | 广州市新栋力超声电子设备有限公司 | Bilateral ultrasonic welder |
| CN102554451B (en) * | 2012-01-19 | 2015-05-06 | 广州市新栋力超声电子设备有限公司 | Bilateral ultrasonic welder |
| CN102717183A (en) * | 2012-07-09 | 2012-10-10 | 哈尔滨正晨焊接切割设备制造有限公司 | Anti-deformation friction welding machine and welding method |
| CN103157901A (en) * | 2013-03-29 | 2013-06-19 | 江苏新创雄铝制品有限公司 | Hub stir friction welding device |
| CN103157901B (en) * | 2013-03-29 | 2015-04-15 | 江苏新创雄铝制品有限公司 | Hub stir friction welding device |
| CN104384704A (en) * | 2014-10-22 | 2015-03-04 | 江苏锐成机械有限公司 | All-electric servo single-head phase friction welding machine |
| CN106270912A (en) * | 2015-05-07 | 2017-01-04 | 苏州安嘉自动化设备有限公司 | The chuck open-and-close mechanism of butt welding machine grip device |
| CN106270912B (en) * | 2015-05-07 | 2018-05-01 | 苏州安嘉自动化设备有限公司 | The chuck open-and-close mechanism of butt welding machine clamp device |
| CN106312290A (en) * | 2016-09-07 | 2017-01-11 | 泉州圆创机械技术开发有限公司 | Bench-type stirring and friction welding equipment |
| CN108608107A (en) * | 2018-05-23 | 2018-10-02 | 江苏科技大学 | A kind of phase friction welding machine and welding method |
| CN111266871A (en) * | 2020-04-01 | 2020-06-12 | 吉林省中赢高科技有限公司 | Novel friction welding equipment and production line |
| CN113909669A (en) * | 2020-07-10 | 2022-01-11 | 天乐国际股份有限公司 | Friction bonding machine structure of heat sink |
| CN112222598A (en) * | 2020-09-14 | 2021-01-15 | 湖南坤鼎数控科技有限公司 | Friction welding device with preheating function |
| CN112222598B (en) * | 2020-09-14 | 2022-03-25 | 湖南坤鼎数控科技有限公司 | Friction welding device with preheating function |
| CN119634936A (en) * | 2024-11-28 | 2025-03-18 | 中国机械总院集团哈尔滨焊接研究所有限公司 | A friction welding auxiliary processing device for thick-walled annular pipe parts and a working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101972890A (en) | Servo direct-drive double-acting multifunctional friction welding machine | |
| CN102848062B (en) | Resistance welding method suitable for multi-point circumferentially-arranged sheets | |
| CN203621979U (en) | Automatic clamping device for shaft workpieces | |
| CN202825090U (en) | Arc surfacing clamping deflection device | |
| CN103920837A (en) | Alternating-current servo type rotary forging machine with external reducing mechanism | |
| CN103921464A (en) | Helical-tooth few tooth difference planetary gear transmission electric servo screw press | |
| CN113458584B (en) | Four-motor direct-drive type alternating-current servo punching and riveting device for multilayer plate friction stir rivet welding and punching and riveting machine | |
| CN105364298A (en) | Backfill type stir friction spot welding device | |
| CN114453803A (en) | Motor stator flat wire welding machine | |
| CN104907669B (en) | It is combined current interruption and the discharge cutting machine structure of efficiently chip removal based on fluid and mechanical movement | |
| CN204294968U (en) | A kind of chuck of processing automobile accessory | |
| CN203556782U (en) | Alternating-current servo direct drive type transmission device of hot die forging press | |
| CN205166172U (en) | Backfill formula friction stir spot welding device | |
| CN209407801U (en) | Spin Welding Device | |
| CN103071835B (en) | The miniature special planer-type milling machine of auto parts and components double | |
| CN108927449B (en) | Single-point progressive forming processing device for tubular parts | |
| CN205702835U (en) | A kind of stuffing pressure adjustable agitating friction device | |
| CN104439868A (en) | Cylinder type rotary positioning device for welding pipe fittings | |
| CN204036126U (en) | Overturn clamping device | |
| CN203288641U (en) | Die bonding arm structure applicable to die bonder of LED packaging device | |
| CN116619085A (en) | Frock clamp of automobile parts processing | |
| CN202447957U (en) | Ram transmission mechanism for vertical lathe | |
| CN203356735U (en) | Numerical control vertical sawing machine for ring unit | |
| CN201931218U (en) | A linear welding machine | |
| CN202291910U (en) | Electric adjustable-speed welding tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110216 |