CN104400208A - Sheet friction stirring welding pump-back spindle head - Google Patents
Sheet friction stirring welding pump-back spindle head Download PDFInfo
- Publication number
- CN104400208A CN104400208A CN201410577466.8A CN201410577466A CN104400208A CN 104400208 A CN104400208 A CN 104400208A CN 201410577466 A CN201410577466 A CN 201410577466A CN 104400208 A CN104400208 A CN 104400208A
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- CN
- China
- Prior art keywords
- shaft
- stirring
- needle
- head
- welding
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/125—Rotary tool drive mechanism
-
- 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
- B23K2101/18—Sheet panels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a sheet friction stirring welding pump-back spindle head which comprises a shaft-shoulder shaft, a stirring needle shaft, a stirring head and a stirring needle, wherein the stirring needle shaft is concentrically mounted with the shaft-shoulder shaft; the stirring needle is mounted in the stirring head; the stirring head is mounted at the top end of the shaft-shoulder shaft; the shaft-shoulder shaft is connected with a hidden motor; the stirring needle is mounted at the top end of the stirring needle shaft; the stirring needle shaft is connected with the shaft-shoulder shaft through a spline; a ball screw nut pair is arranged at the tail end of the stirring needle shaft; the ball screw nut pair is connected with a servo motor through a synchronous pulley mechanism and a speed reducer; a sensor set is arranged at the tail end of the ball screw nut pair. The sheet friction stirring welding pump-back spindle head has the advantages of high precision, excellent controllability for the speed and feeding quantity of the pump-back stroke and great output pump-back force.
Description
Technical field
The present invention relates to a kind of thin plate friction stir welding can pumpback main tapping.
Background technology
Friction stir welding is by Britain's institute of welding (The Welding Institute; be called for short TWI) a kind of solid-state bonding process of proposing in 1991, and in 1993 and nineteen ninety-five both developed and developing country application worldwide intellectual property protection.This know-why is simple, and controling parameters is few, is easy to automation, the human factor in welding process can be dropped to minimum.Agitating friction welding technology, compared with traditional melting welding, has lot of advantages, thus makes it have prospects for commercial application and development potentiality widely.About the research of the impact etc. of the tissue of friction stir welding, mechanical property (comprising fracture, fatigue, corrosive nature), Non-Destructive Testing and technological parameter butt welded seam quality is the basis of applying friction stir welding, the research about these aspects is the study hotspot in this field.Agitating friction welding technology be in world's solder technology development history Zi invention to the magical solid diffusivity new technology of short and the most with fastest developing speed one of commercial Application time span.End on September 15th, 2002, the user obtaining the license of Britain's institute of welding (TWI) friction stir welding patented technology in world wide has had 78, the patented technology relevant to agitating friction welding technology has 551, and user has covered 24 countries and regions.The companies such as famous Boeing, NASA, BAE, HONDA, GE, HITACHI, MARTIN have purchased technique, and a large amount of applying with succeeding in industries such as space flight, aviation, vehicle, shipbuildings.
The Fundamentals of Welding of friction stir welding are: be placed in docking workpiece on backing plate by clamp, unclamp to prevent banjo fixing butt jointing in welding process.A stirring-head with special type stirring finger rotates and inserts two pieces of commissures of docking between sheet material by stirring finger slowly.In general, the degree of depth of length close to weld seam of finger is stirred.When the stirring finger contact surface of the work rotated, with the quick fricative frictional heat of surface of the work, the temperature of contact point material is raised, intensity reduces.Stir finger continuous upset and the material extruding seam both sides under external force, till shaft shoulder close contact surface of the work.At this moment, below the shaft shoulder and around stirring finger, a large amount of plasticizing layers is formed by the frictional heat rotating the shaft shoulder and the generation of stirring finger.When workpiece relative to stir finger move or stir finger opposite piece move time, stirring under the mechanical agitation and upset effect that finger side and direction of rotation produce, the front surface stirring finger is transplanted on the material of plasticizing and stirs finger rear surface.When stirring finger and advancing along seam, the banjo fixing butt jointing surface of stirring soldering tip front is heated to superplastic state by friction.Stir finger and shaft shoulder friction seam, broken oxide-film, stirs and recombinates and stir the ground material at finger rear.Just weld seam is formed after stirring the material cooled at finger rear.This weld seam visible is the solid-state weld seam formed under heat, machine synergy.This method can be regarded as a kind of self-locking hole interconnection technique, and in welding process, stir finger place place and form aperture, aperture is filled again in welding process subsequently, leaves a keyhole at the end of iting is noted that stirring friction welding seam in terminal.Usually this keyhole can cut away, and also can live with other welding method soldering and sealing.
Thin plate friction stir welding can be applicable to single shaft shoulder and double-shaft shoulder stirring-head by pumpback main tapping, to eliminate the keyhole stirring and weld and produce.
The Chinese invention patent that the patent No. is CN200420003406.7, patent name is " can pumpback friction stir welding main tapping ", relates to the improvement to friction stir welding machine.It comprises housing, main shaft, mixing needle and motor, has sliding sleeve chamber and actuator chamber at housing rear portion; Grooved hole on main shaft, has pull bar in the endoporus of main shaft, and its front end is connected with mixing needle, and there is a pin-and-hole rear end, and sliding sleeve is enclosed within main shaft, and main shaft, pull bar and sliding sleeve are combined into the type of attachment that can move to axial by bearing pin; Have a shift fork, its lower end is connected with servomotor by gear, gearbox, and the upper end of shift fork arm is connected with sliding sleeve by axle; On housing, the position of slotted eye is fixed wtih a displacement measurement mechanism.This invention adopts machine driving pumpback mixing needle, avoids the harm that fluid pressure type leakage of oil brings.Structure is simple, and cost is low.By closed-loop control, the pumpback displacement accuracy of mixing needle is high.
But the precision of its pumpback main tapping can't meet the demands.
Summary of the invention
The technical issues that need to address of the present invention are just the defect overcoming prior art, provide a kind of thin plate friction stir welding can pumpback main tapping, and its precision is high, and speed and the amount of feeding controllability of pumpback stroke are good, exports back-suction large.
For solving the problem, the present invention adopts following technical scheme:
The invention provides a kind of thin plate friction stir welding can pumpback main tapping, comprise shaft shoulder axle, the stirring needle shaft installed concentric on shaft shoulder axle, and stirring-head and be installed on mixing needle in stirring-head, described stirring-head is installed on the top of shaft shoulder axle, described shaft shoulder axle is connected with built-in motor, mixing needle is installed on the top of stirring needle shaft, described stirring needle shaft is connected with shaft shoulder axle by spline, the tail end of described stirring needle shaft is provided with a ballscrew nut fitting, described ballscrew nut fitting is connected with servomotor by synchronous pulley mechanism and reductor, the end of ballscrew nut fitting is provided with sensor group.
The operation principle of invention is: thin plate friction stir welding can adopt built-in motor to provide stirring welding moment of torsion by pumpback main tapping, shaft shoulder axle is driven to drive stirring-head High Rotation Speed, stir needle shaft to be rotated together with shaft shoulder axle by spline joint, stirring needle shaft can slide axially simultaneously.Stirring sliding axially of needle shaft is connect reductor by servomotor to drive ballscrew nut fitting to rotate by synchronous pulley mechanism, to be in line motion through adjutant's feed screw nut convert rotational motion, then to drive and stir needle shaft and move vertically and realize the pumpback function of mixing needle.The end sensor installation group of feed screw nut pair provides position model to form closed-loop control, achieves the position control to mixing needle pumpback function and adjustment.It is the rotating speed reduction that servomotor is exported by the object of reductor, the moment of torsion exported is increased, strengthens and stir needle shaft pumpback stationarity, during to ensure pumpback, primary feed amount is reduced to 0.01mm, position control accuracy brings up to ± and 0.02, meet the welding of thickness at about 1mm aluminium sheet.
Thin plate friction stir welding of the present invention can pumpback main tapping precision high, speed and the amount of feeding controllability of pumpback stroke are good, export back-suction large.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, the invention provides a kind of thin plate friction stir welding can pumpback main tapping, comprise shaft shoulder axle 1, the stirring needle shaft 2 installed concentric on shaft shoulder axle, and stirring-head 3 and the mixing needle 4 that is installed in stirring-head, described stirring-head is installed on the top of shaft shoulder axle, described shaft shoulder axle is connected with built-in motor 5, mixing needle is installed on the top of stirring needle shaft, described stirring needle shaft is connected with shaft shoulder axle by spline, the tail end of described stirring needle shaft is provided with a ballscrew nut fitting 6, described ballscrew nut fitting is connected with servomotor 9 by synchronous pulley mechanism 7 and reductor 8, the end of ballscrew nut fitting is provided with sensor group 10.
The operation principle of invention is: thin plate friction stir welding can adopt built-in motor to provide stirring welding moment of torsion by pumpback main tapping, shaft shoulder axle is driven to drive stirring-head High Rotation Speed, stir needle shaft to be rotated together with shaft shoulder axle by spline joint, stirring needle shaft can slide axially simultaneously.Stirring sliding axially of needle shaft is connect reductor by servomotor to drive ballscrew nut fitting to rotate by synchronous pulley mechanism, to be in line motion through adjutant's feed screw nut convert rotational motion, then to drive and stir needle shaft and move vertically and realize the pumpback function of mixing needle.The end sensor installation group of feed screw nut pair provides position model to form closed-loop control, achieves the position control to mixing needle pumpback function and adjustment.It is the rotating speed reduction that servomotor is exported by the object of reductor, the moment of torsion exported is increased, strengthens and stir needle shaft pumpback stationarity, during to ensure pumpback, primary feed amount is reduced to 0.01mm, position control accuracy brings up to ± and 0.02, meet the welding of thickness at about 1mm aluminium sheet.
Thin plate friction stir welding of the present invention can pumpback main tapping precision high, speed and the amount of feeding controllability of pumpback stroke are good, export back-suction large.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (1)
1. a thin plate friction stir welding can pumpback main tapping, it is characterized in that: comprise shaft shoulder axle, the stirring needle shaft installed concentric on shaft shoulder axle, and stirring-head and be installed on mixing needle in stirring-head, described stirring-head is installed on the top of shaft shoulder axle, described shaft shoulder axle is connected with built-in motor, mixing needle is installed on the top of stirring needle shaft, described stirring needle shaft is connected with shaft shoulder axle by spline, the tail end of described stirring needle shaft is provided with a ballscrew nut fitting, described ballscrew nut fitting is connected with servomotor by synchronous pulley mechanism and reductor, the end of ballscrew nut fitting is provided with sensor group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577466.8A CN104400208A (en) | 2014-10-22 | 2014-10-22 | Sheet friction stirring welding pump-back spindle head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577466.8A CN104400208A (en) | 2014-10-22 | 2014-10-22 | Sheet friction stirring welding pump-back spindle head |
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| Publication Number | Publication Date |
|---|---|
| CN104400208A true CN104400208A (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410577466.8A Pending CN104400208A (en) | 2014-10-22 | 2014-10-22 | Sheet friction stirring welding pump-back spindle head |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364298A (en) * | 2015-12-09 | 2016-03-02 | 哈尔滨工业大学（威海） | Backfill type stir friction spot welding device |
| CN110193657A (en) * | 2019-05-06 | 2019-09-03 | 上海发那科机器人有限公司 | A kind of two-freedom friction welding (FW) mainshaft mechanism suitable for industrial robot |
| CN111408832A (en) * | 2020-03-11 | 2020-07-14 | 天津大学 | Friction plug repair welding spindle head device |
-
2014
- 2014-10-22 CN CN201410577466.8A patent/CN104400208A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364298A (en) * | 2015-12-09 | 2016-03-02 | 哈尔滨工业大学（威海） | Backfill type stir friction spot welding device |
| CN110193657A (en) * | 2019-05-06 | 2019-09-03 | 上海发那科机器人有限公司 | A kind of two-freedom friction welding (FW) mainshaft mechanism suitable for industrial robot |
| CN111408832A (en) * | 2020-03-11 | 2020-07-14 | 天津大学 | Friction plug repair welding spindle head device |
| CN111408832B (en) * | 2020-03-11 | 2022-03-08 | 天津大学 | Friction plug repair welding spindle head device |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |