Stirring head for friction stir welding

Abstract

The utility model belongs to welding processing equipment, and particularly relates to a stirring head for friction stir welding, which is used for welding a large-diameter and large-wall-thickness furnace body. The stirring head for friction stir welding comprises a stirring head clamping handle, the stirring head clamping handle comprises a cylindrical handle body, a taper shank is arranged at the tail end of the handle body, a connecting ring is arranged at the position, close to the taper shank, of the surface of the handle body, transmission grooves are symmetrically formed in the connecting ring, a plurality of connecting holes are further formed in the connecting ring, and the connecting holes are communicated with the transmission grooves. An inserting hole is formed in the axis of the handle body, the stirring needle is connected to the end of a stirring shaft, a shaft shoulder is arranged at the position, close to the stirring needle, of the stirring shaft, the stirring shaft is inserted into the inserting hole in a matched mode, and the end face of the shaft shoulder abuts against the end face of the handle body. The utility model designs a stirring head for friction stir welding, which is used for welding a large wall thickness under the condition of heavy load.

Description

TECHNICAL FIELD

[0001] The utility model belongs to welding processing equipment, in particular to a stirring head for the friction stir welding of the furnace body with large diameter and large wall thickness. BACKGROUND

[0002] With the continuous improvement of production process, new requirements are put forward for the furnace body in the life process, and the thickness of the plate of the furnace body is getting thicker and thicker, and the existing welding technology is not suitable for the welding of such thick plate.

[0003] The cavity inner diameter of the furnace body produced by our company is greater than or equal to 2m, the cylinder wall thickness is greater than or equal to 50mm, and the welding reliability has a great influence on the reliability of the furnace body.

[0004] The stirring head of the friction stir welding needs to bear a large upset force and forward resistance load in the working process, and also needs to meet the demand of rotating output large torque, since the wall thickness of the product welded by the unit is thick, a stirring head for the friction stir welding under heavy load is needed. SUMMARY

[0005] In view of the deficiencies in the prior art, the utility model designs a stirring head for the friction stir welding of large wall thickness under heavy load.

[0006] The technical scheme of the utility model is as follows:

[0007] The stirring head of the friction stir welding comprises a stirring head clamping handle, characterized in that: the stirring head clamping handle comprises a cylindrical handle body, the end of the handle body is provided with a taper handle, the surface of the handle body is provided with a connecting ring near the taper handle, a transmission groove is symmetrically arranged on the connecting ring, a plurality of connecting holes are further arranged on the connecting ring, a plug-in hole is arranged on the axis of the handle body, and a stirring needle is further arranged.

[0008] The surface of the handle body is provided with at least one fixed hole, the surface of the stirring shaft is provided with at least one fixed plane, and the fastener is connected in the fixed hole and the end thereof abuts against the fixed plane of the stirring shaft.

[0009] The surface of the handle body is further provided with a reinforcing part, and the end of the reinforcing part is connected with the connecting ring.

[0010] The plug-in hole is a stepped hole, the stepped hole is divided into a first section and a second section, the diameter of the first section of the stepped hole is the same as that of the stirring shaft, and the length of the first section of the stepped hole is greater than the length between the end of the stirring shaft and the end surface of the shaft shoulder.

[0011] The stirring needle is conical, and the surface of the stirring needle is uniformly distributed with three cutting surfaces, and the surface of the stirring shaft is spirally distributed with stirring grooves with a semicircular cross section.

[0012] The length of the stirring head is 52mm.

[0013] In summary, the utility model has the following beneficial effects:

[0014] The stirring head of the friction stir welding is improved, the structural strength of the stirring head clamping handle is improved through the added connecting ring, the transmission groove is used for connecting with the driving mechanism, the carrying capacity of the stirring head clamping handle is improved, the demand of large torque of large thickness workpiece welding can be met, simultaneously, the stirring head of the utility model adopts the assembled structure of the stirring head clamping handle, the stirring shaft and the stirring head, when the stirring head is worn, only the stirring shaft and the stirring head need to be replaced, and the use cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic view of the utility model;

[0016] Figure 2 It is a half-section schematic view of the utility model;

[0017] Figure 3 It is a three-dimensional schematic view of the stirring shaft, the stirring needle and the shaft shoulder of the utility model;

[0018] Figure 4 It is a front view schematic view of the utility model;

[0019] Fig. 1 is a stirring head clamping handle, 10 is a handle body, 11 is a taper handle, 12 is a connecting ring, 120 is a transmission groove, 121 is a connecting hole, 13 is a plug-in hole, 100 is a fixing hole, 101 is a reinforcing part, 130 is a first section, 131 is a second section,

[0020] 2 is a stirring needle, 20 is a stirring shaft, 21 is a shaft shoulder, 200 is a fixing plane, 22 is a cutting surface, 23 is a stirring groove. DETAILED DESCRIPTION

[0021] The present application will be further described in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and can be implemented, but the embodiments are not as the limitation of the present application.

[0022] It is to be noted that when an element is referred to as being "on" or "fixed to" another element, it can be directly on or fixed to the other element or intervening elements can also be present. When an element is referred to as being "fixed to" or "connected to" another element, it can be fixedly or detachably connected to the other element. When an element is referred to as being "connected" or "rotatably connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right", "upper", "lower", and the like as used herein are for the purpose of illustration only and do not indicate the only possible orientation of the device.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] The terms "first", "second", "third", and the like, as used herein, do not denote any quantity or order, but merely distinguish between different sets, instances or a single set, instance of an item.

[0025] Referring to Figure 1 As shown, the friction stir welding tool comprises a tool holder 1, the tool holder 1 comprises a cylindrical holder body 10, the end of the holder body 10 is provided with a taper shank 11, the taper shank is used for a pre-connection and positioning with a driving device, the surface of the holder body 10 is provided with a connecting ring 12 near the taper shank, the connecting ring 12 is symmetrically provided with a transmission groove 120, the connecting ring 12 is also provided with a plurality of connecting holes 120, the driving mechanism is provided with a transmission block inserted into the transmission groove, and a fastener passes through the connecting hole and is connected with the driving mechanism, so as to realize the fixation of the tool holder and the driving mechanism, the transmission groove is used to increase the transmission of torque, so as to meet the requirement of large welding depth in the processing process of the unit, the axis of the holder body 10 is provided with a plug-in hole 13, and the tool further comprises a stirring needle 2, the stirring needle 2 is connected to the end of a stirring shaft 20, the stirring shaft 20 is provided with a shaft shoulder 21 near the stirring needle, the stirring shaft 20 is inserted into the plug-in hole 13, and the end surface of the shaft shoulder 21 abuts against the end surface of the holder body 10.

[0026] The utility model discloses the stirring head of the friction stir welding has carried out the improvement, first, adopt split type structure design, when the stirring needle appears the abrasion, only needs to replace stirring needle and stirring shaft, reduces the use cost of stirring head, secondly, the improvement has been carried out to the stirring head clamping handle, and the connection of stirring head clamping handle and driving mechanism is realized through the connecting ring, and the transmission of power is increased through the transmission groove, the demand of big torque of the big thickness work piece welding of the company is satisfied, and the impact of fastener when the stirring head works is also reduced, and the service life of fastener is guaranteed, and is not easy to loosen.

[0027] The surface of the handle body 10 is provided with at least one fixed hole 100, and the surface of the stirring shaft 20 is provided with at least one fixed plane 200, and the fastener is connected in the fixed hole and the end portion is abutted on the fixed plane of the stirring shaft.

[0028] The surface of the handle body 10 is further provided with a reinforcing portion 101, and the end of the reinforcing portion 101 is connected with the connecting ring 12.

[0029] The insertion hole 13 is a stepped hole, and the stepped hole is divided into a first section 130 and a second section 131.

[0030] The stirring needle 2 is conical, and the surface of the stirring needle is uniformly provided with three cutting surfaces 22.

[0031] The length of the stirring head 2 is 52mm.

[0032] The utility model has the advantages of the following:

[0033] The utility model discloses an improved stirring head for friction stir welding, the structural strength of the stirring head clamping handle is improved by the additionally arranged connecting ring, the transmission groove is used for connecting with the driving mechanism, the load bearing capacity of the stirring head clamping handle is improved, the demand of large torque for welding large thickness workpieces can be met, meanwhile, the stirring head of the utility model adopts the assembled structure of the stirring head clamping handle, the stirring shaft and the stirring head, when the stirring head is worn, only the stirring shaft and the stirring head need to be replaced, and the use cost is reduced.

[0034] Based on the described embodiments of the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

Claims

1. A friction stir welding tool comprising a tool shank, characterised in that: The stirring head holder includes a cylindrical holder body, a taper holder end of the holder body, a connecting ring on the surface of the holder body near the taper holder, a transmission groove symmetrically arranged on the connecting ring, a plurality of connecting holes on the connecting ring, an insertion hole on the axis of the holder body, a stirring needle connected to the end of a stirring shaft, a shaft shoulder on the stirring shaft near the stirring needle, the stirring shaft inserted into the insertion hole, and the end surface of the shaft shoulder abutting against the end surface of the holder body.

2. The friction stir welding tool according to claim 1, wherein: The surface of the holder body is provided with at least one row of fixing holes, the surface of the stirring shaft is provided with at least one fixing plane, and the fastener is connected into the fixing hole and abuts against the fixing plane of the stirring shaft.

3. The friction stir welding tool of Claim 1 wherein: The surface of the holder body is further provided with a reinforcing part, and the end of the reinforcing part is connected to the connecting ring.

4. The friction stir welding tool of Claim 1 wherein: The insertion hole is a stepped hole, the stepped hole is divided into a first section and a second section, the diameter of the first section of the stepped hole is the same as the diameter of the stirring shaft, and the length of the first section of the stepped hole is greater than the length between the end of the stirring shaft and the end surface of the shaft shoulder.

5. The friction stir welding tool of Claim 1 wherein: The stirring needle is conical, the surface of the stirring needle is uniformly distributed with three cutting surfaces, and the surface of the stirring shaft is helically distributed with stirring grooves with semicircular cross sections.

6. The friction stir welding tool according to any one of claims 1 to 5, wherein: The length of the stirring head is 52 mm.

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