CN202555967U

CN202555967U - Novel aluminum alloy tool pin

Info

Publication number: CN202555967U
Application number: CN2012201727202U
Authority: CN
Inventors: 汪阳; 周正勇
Original assignee: WUXI AMANO CNC EQUIPMENT CO Ltd
Current assignee: WUXI AMANO CNC EQUIPMENT CO Ltd
Priority date: 2012-04-23
Filing date: 2012-04-23
Publication date: 2012-11-28
Anticipated expiration: 2022-04-23

Abstract

The utility model discloses a novel aluminum alloy tool pin which comprises a conical tool pin, wherein a conical surface of the conical tool pin is provided with multi-direction of turning helixes. Three face edges and three conical edges are uniformly arranged on the conical surface of the conical tool pin. Helixes with different directions of turning are respectively disposed on the three conical edges, including a helix in right direction of turning, a helix in left direction of turning, and a ring helix. The novel aluminum alloy tool pin is capable of increasing welding thickness from 40 millimeters to 80 millimeters and improving 100% welding thickness. Change of the tool pin in structure enables heat generated by friction to be more uniform, material flow to be more reasonable, and quality of formed welding seam to be better.

Description

The novel aluminum alloy mixing needle

Technical field

The utility model relates to a kind of novel aluminum alloy mixing needle.

Background technology

Friction stir welding is a kind of solid-state method of attachment that was proposed in 1991 by Britain's institute of welding (The Welding Institute, be called for short TWI), and in 1993 with nineteen ninety-five both developed and developing country application worldwide intellectual property protection.This know-why is simple, and the control parameter is few, is easy to automation, can the human factor in the welding process be dropped to minimum.The agitating friction welding technology is compared with traditional melting welding, has lot of advantages, thereby makes it have wide industrial application prospect and development potentiality.The research of the influence of the tissue of relevant friction stir welding, mechanical property (comprising fracture, fatigue, corrosive nature), Non-Destructive Testing and technological parameter butt welded seam quality etc. is the basis of applying friction stir welding, and the research of relevant these aspects is these hot research fields.The agitating friction welding technology is to be connected new technology from the solid phase of inventing a commercial Application time span mystery short and the most with fastest developing speed on world's solder technology development history.By on September 15th, 2002, obtain in the world wide permission of Britain's institute of welding (TWI) friction stir welding patented technology the user oneself through 78 families are arranged, the patented technology relevant with the agitating friction welding technology has 551, the user has covered 24 countries and regions.Companies such as famous B o e i n g, NASA, BAE, HONDA, GE, HITACHI, MARTIN have bought this technology, and a large amount of using in industries such as space flight, aviation, vehicle, shipbuildings with succeeding.

The Fundamentals of Welding of friction stir welding are: place the butt joint workpiece on the backing plate to pass through clamp, unclamp in welding process to prevent banjo fixing butt jointing.One has special type and stirs the stirring-head rotation of finger and will stir the commissures between two butt joints of finger insertion sheet material slowly.In general, stir the degree of depth of the length of finger near weld seam.When stirring finger contact workpiece when surface of rotation, with the quick fricative frictional heat of surface of the work the temperature of contact point material is raise, intensity reduces.Stir the material on continuous under external force upset of finger and extruding seam both sides, till the tight contact workpiece of shaft shoulder surface.At this moment, below the shaft shoulder with around stirring finger, form a large amount of plasticizing layers by the rotation shaft shoulder and the frictional heat that stirs the finger generation.When workpiece moves or stirs finger when workpiece moves relative to stirring finger, stirring under the mechanical agitation and upset effect that produces on finger side and the direction of rotation, the front surface that stirs finger is transplanted on the material of plasticizing behind the stirring finger surperficial.Stirring finger when seam is advanced, the banjo fixing butt jointing surface of stirring the soldering tip front is heated to the superplasticity state by friction.Stir the finger and shaft shoulder friction seam, broken oxide-film stirs and the ground material at finger rear is stirred in reorganization.Just form weld seam after the material cooled at stirring finger rear.It is thus clear that this weld seam is the solid-state weld seam that under heat, machine synergy, forms.This method can be regarded as a kind of self-locking hole interconnection technique, in welding process, stirs place, finger place and forms aperture, and aperture is filled again in welding process subsequently, is noted that when stirring friction welding seam finishes to stay a keyhole at the terminal.Usually this keyhole can cut away, and also can use other welding method soldering and sealing to live.

The effect of mixing needle is to produce heat through spin friction to provide welding required heat, and drives the mobile to form weld seam of mixing needle material around; The shape of mixing needle is most important to stirring solder technology, and it has determined the plastic flowing of heating and material.When the thickness of welding material increased, fricative heat also became important origin of heat between mixing needle and the workpiece.

Existing aluminium alloy mixing needle structure mainly contains light face cylinder, the common cylinder screw thread, and tapered thread, the screw thread of big groove screw thread and band helical flow groove etc., its throat thickness is all less than 40mm.

Existing stirring-head can't realize that thickness surpasses the welding of the aluminium alloy plate of 40mm.

The utility model content

The utility model technical issues that need to address just are to overcome the defective of prior art, and a kind of novel aluminum alloy mixing needle is provided, and it can by original 40mm 80mm till now, improve throat thickness 100% so that throat thickness increases; The change of mixing needle structure makes fricative heat more even, and it is more reasonable that material flows, and the weldquality of formation is better.

For addressing the above problem, the utility model adopts following technical scheme:

The utility model provides a kind of novel aluminum alloy mixing needle, comprises conical mixing needle, and said conical mixing needle taper seat is provided with many rotation directions helix.

Be evenly equipped with 3 on the said conical mixing needle taper seat and face seamed edge and 3 conical surface limits directly, be respectively arranged with the helix of different rotation directions on 3 conical surface limits, be respectively dextrorotation to helix, left-handed to helix and annular helical line.

The effect of mixing needle is to produce heat through spin friction to provide welding required heat, and drives the mobile to form weld seam of mixing needle material around; The shape of mixing needle is most important to stirring solder technology, and it has determined the plastic flowing of heating and material.When the thickness of welding material increased, fricative heat also became important origin of heat between mixing needle and the workpiece; Its structure of novel aluminum alloy mixing needle adopts many rotation directions of circular cone helix; On taper seat, be uniformly distributed with 3 and faced seamed edge directly; Process the helix of different rotation directions on while 3 taper seats respectively; Repeat multi-direction mechanical agitation power for the weld metal zone plastic material provides, it is more reasonable that material is flowed, to form fine and close seam organization.

Description of drawings

Fig. 1 is the utility model perspective view.

Fig. 2 is that the utility model is left-handed to helix and annular helical line structural representation.

Fig. 3 is that the utility model dextrorotation is to the helix structure sketch map.

Fig. 4 is the utility model cross-sectional structure sketch map.

The specific embodiment

Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, the utility model provides a kind of novel aluminum alloy mixing needle, comprises conical mixing needle 1, and said conical mixing needle taper seat is provided with many rotation directions helix.

Be evenly equipped with 3 on the said conical mixing needle taper seat and face seamed edge 111,112,113 directly; With 3 conical surfaces; 121, be respectively arranged with the helix of different rotation directions on 122,123,3 conical surface limits, be respectively dextrorotation to helix 2, left-handed to helix 3 and annular helical line 4.

What should explain at last is: obviously, the foregoing description only be for explain clearly that the utility model does for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being amplified out thus or change still are among the protection domain of the utility model.

Claims

1. novel aluminum alloy mixing needle, it is characterized in that: comprise conical mixing needle, said conical mixing needle taper seat is provided with many rotation directions helix.

2. novel aluminum alloy mixing needle as claimed in claim 1; It is characterized in that: be evenly equipped with 3 on the said conical mixing needle taper seat and face seamed edge and 3 conical surface limits directly; Article 3, be respectively arranged with the helix of different rotation directions on the conical surface limit, be respectively dextrorotation to helix, left-handed to helix and annular helical line.