Friction stir welding static shaft shoulder device for welding driver shell

Abstract

The utility model relates to a friction stir welding static shaft shoulder device for welding a driver shell. The friction stir welding static shaft shoulder device comprises a static shaft shoulder sleeve, a rotary driving shaft and a bearing, firstly, device assembly is completed according to the welding requirement of the driver shell. The upper body barrel of the static shaft shoulder sleeve is fixedly connected with welding equipment through a flange ring, and then the lower body barrel is detachably connected with the upper body barrel, so that the supporting sleeve is stably arranged in the static shaft shoulder sleeve; the bearing ensures that the rotary driving shaft stably rotates in the static shaft shoulder sleeve, shaking or eccentricity is avoided, and the positioning precision of the stirring needle is guaranteed; the supporting sleeve provides stable support for the bearing, and the operation stability of the device is further improved. When the abraded stirring needle needs to be replaced or welding parameters need to be adjusted according to the thickness of the shell, the connection between the rotary driving shaft and the stirring needle, the connection between the upper body cylinder and the lower body cylinder and the connection between the bearing inner ring and the rotary driving shaft can be directly detached, the parts can be reassembled after being replaced or adjusted, the whole process is convenient and efficient, and the downtime is effectively shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to static axle shoulder technical field, concretely relates to a kind of static axle shoulder device for drive housing welding of friction stir welding. BACKGROUND

[0002] In the field of mechanical manufacturing, the drive housing as a key bearing and protection component, its welding quality directly affects the overall performance and service life of the drive. Since the drive housing is mostly made of lightweight alloy materials such as aluminum alloy, and the structure often has features such as thin wall and complex cavity, it puts forward strict requirements on the precision of welding process, heat input control and joint strength. As a solid-phase joining technology, friction stir welding has been widely used in the welding of lightweight alloy components due to its low heat input, small joint deformation and excellent mechanical properties during welding process. The structure design of the static axle shoulder device, as one of the core components of the friction stir welding equipment, directly determines the stability of the welding process, the weld forming quality and the application range of the equipment. The existing static axle shoulder device often has the following problems when welding the drive housing: on the one hand, the matching precision between the static axle shoulder and the rotating drive shaft is insufficient, which causes the static axle shoulder to shake or deviate during the welding process, affecting the positioning accuracy of the stirring needle, and further causing poor weld forming; on the other hand, the static axle shoulder assembly has poor detachability, and when the stirring needle is worn out or needs to be adjusted for welding parameters for different thickness of the housing, the disassembly process is complicated, which reduces the production efficiency. SUMMARY

[0003] The main purpose of the present utility model is to provide a static axle shoulder device for friction stir welding of drive housing, to solve the problem of poor detachability of the static axle shoulder assembly in the prior art, which causes the stirring needle to wear out or needs to be adjusted for welding parameters for different thickness of the housing, and the disassembly process is complicated, which reduces the production efficiency.

[0004] In order to achieve the above purpose, the utility model provides a static axle shoulder device for friction stir welding of drive housing, comprising a static axle shoulder sleeve, a rotating drive shaft and a bearing.

[0005] The static axle shoulder sleeve comprises an upper body and a lower body. One end of the upper body is coaxially connected to a flange ring for connecting a welding device, and the other end is detachably connected to the lower body. The top end of the lower body is coaxially connected to a support sleeve, and the bottom is provided with an axial through hole. The support sleeve is located in the static axle shoulder sleeve.

[0006] The top end of the rotating drive shaft is provided with a drive slot for inserting the welding device. The rotating drive shaft is sleeved in the static axle shoulder sleeve, and the bottom end is detachably connected to the stirring needle. The stirring needle passes through the axial through hole.

[0007] The outer ring of the bearing is fixedly connected to the inner wall of the support sleeve, and the inner ring is detachably connected to the rotating drive shaft.

[0008] Preferably, the inner ring of the bearing is provided with a first inner thread around the circumference, and the outer wall of the rotating drive shaft is provided with a first outer thread around the circumference, and the first outer thread is screwed with the first inner thread.

[0009] Preferably, the drive slot is a cross slot or a straight slot.

[0010] Preferably, the static shaft shoulder sleeve further comprises a sleeve, and the inner wall of the sleeve is provided with a second inner thread around the circumference, and one end of the sleeve is coaxially connected to the annular limiting plate;

[0011] The bottom end of the upper body tube is provided with a second outer thread around the circumference, and the top end of the lower body tube is coaxially sleeved with the fixed ring plate.

[0012] The second inner thread is screwed with the second outer thread, the upper wall of the fixed ring plate abuts against the bottom end of the lower body tube, and the lower wall abuts against the annular limiting plate.

[0013] Preferably, the outer wall of the sleeve is provided with a plurality of vertical grooves around the circumference.

[0014] Preferably, the upper body tube and the lower body tube are both provided with a plurality of heat dissipation holes around the circumference.

[0015] Preferably, both ends of the upper body tube and one end of the lower body tube are open.

[0016] The end of the lower body tube away from the opening is provided with an axial through hole.

[0017] The above scheme has the following beneficial effects:

[0018] Before welding, the device is assembled according to the welding requirements of the driver housing. The bearing outer ring is fixed with the inner wall of the support sleeve, the rotating drive shaft passes through the bearing inner ring and is detachably connected, and finally the appropriate stirring needle is installed at the bottom end of the rotating drive shaft to ensure that the stirring needle passes through the axial through hole at the bottom of the lower body and is accurately positioned. Further, the upper body of the static shaft shoulder sleeve is connected and fixed with the welding equipment through the flange ring, and the lower body is detachably connected with the upper body, so that the support sleeve is stably arranged in the static shaft shoulder sleeve. Then, during the welding operation, the driving part of the welding equipment is inserted into the driving slot at the top end of the rotating drive shaft to drive the rotating drive shaft to rotate at high speed, and at this time the static shaft shoulder sleeve remains in a fixed state. The rotating stirring needle contacts the welding part of the driver housing, and the heat generated by friction softens the material in the welding area, and under the axial pressure of the rotating drive shaft, the softened material is stirred and extruded to form a weld. During the welding process, the bearing ensures that the rotating drive shaft rotates stably in the static shaft shoulder sleeve, avoids shaking or eccentricity, and ensures the positioning accuracy of the stirring needle; the support sleeve provides stable support for the bearing, further improving the stability of the device. When it is necessary to replace the worn stirring needle or adjust the welding parameters according to the thickness of the housing, the connection of the rotating drive shaft and the stirring needle, the connection of the upper body and the lower body, and the connection of the bearing inner ring and the rotating drive shaft can be directly disassembled, and after the replacement or adjustment of the parts is completed, the device can be reassembled, the whole process is convenient and efficient, and the downtime is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further explained in detail below in combination with the drawings and specific embodiments.

[0020] Figure 1 is the explosion state structure schematic view of the static shaft shoulder device for the friction stir welding of the driver housing of the utility model;

[0021] Figure 2 is the three-dimensional structure schematic view of the static shaft shoulder device for the friction stir welding of the driver housing of the utility model;

[0022] Figure 3 is the structure schematic view of the section state of Figure 2 ;

[0023] Figure 4 is the front view structure schematic view of Figure 3 .

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1, static shaft shoulder sleeve; 10, heat dissipation hole; 11, upper body; 110, second external thread; 121, fixed ring plate; 12, lower body; 120, axial through hole; 13, flange ring; 14, sleeve; 141, annular limiting plate; 142, vertical groove;

[0026] 2, support sleeve;

[0027] 3. Rotating drive shaft; 31. Drive slot; 32. First external thread;

[0028] 4. Stirring needle;

[0029] 5. Bearing; 51. First internal thread. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0031] Embodiment:

[0032] As Figures 1-4As shown, the embodiment provides a friction stir welding static shoulder device for driver housing welding, which comprises a static shoulder sleeve 1, a rotating drive shaft 3 and a bearing 5. The static shoulder sleeve 1 comprises an upper body sleeve 11 and a lower body sleeve 12, both ends of the upper body sleeve 11 and one end of the lower body sleeve 12 are open. An axial through hole 120 is formed at the end of the lower body sleeve 12 away from the opening (wherein the upper body sleeve can be regarded as a tubular structure, both ends are designed to be open. The lower body sleeve can be regarded as a barrel structure, and the axial through hole is regarded as a hole in the barrel wall). One end of the upper body sleeve 11 is coaxially connected to a flange ring 13 for connecting a welding device, and the other end is detachably connected to the lower body sleeve 12. The welding device of the utility model adopts the prior art, so it is not necessary to make too much repetition. The welding device is fixedly connected with the flange ring. The upper body sleeve 11 of the static shoulder sleeve 1 is connected and fixed with the welding device through the flange ring 13, the top end of the lower body sleeve 12 is coaxially connected to a support sleeve 2, and an axial through hole 120 is formed at the bottom of the lower body sleeve 12. The support sleeve 2 is located in the static shoulder sleeve 1. A drive slot 31 for inserting the welding device is formed at the top end of the rotating drive shaft 3. The drive slot 31 is used to match the drive shaft insertion strip of the welding device of the prior art, and the insertion strip is inserted into the drive slot. The drive slot 31 is a cross slot or a straight slot. The rotating drive shaft 3 is sleeved in the static shoulder sleeve 1, and the bottom end is detachably connected to a stirring needle 4. The stirring needle 4 passes through the axial through hole 120. The outer ring of the bearing 5 is fixedly connected with the inner wall of the support sleeve 2, and the inner ring is detachably connected with the rotating drive shaft 3. The inner ring of the bearing 5 is provided with a first inner thread 51, and the outer ring wall of the rotating drive shaft 3 is provided with a first outer thread 32. The first outer thread 32 is screw-connected with the first inner thread 51, which facilitates the disassembly and assembly of the structure. It should be noted that the first inner thread is screwed to the end of the threaded section of the first outer thread, so as to prevent the first outer thread 32 from continuing to screw with the first inner thread 51 when the rotating drive shaft 3 rotates.

[0033] Before welding, the device is assembled according to the welding requirements of the driver shell. The rotating drive shaft 3 passes through the inner ring of the bearing 5 and is detachably connected, the bottom end of the rotating drive shaft 3 is provided with a suitable stirring needle 4, which ensures that the stirring needle 4 passes through the axial through hole 120 at the bottom of the lower body 12 and is accurately positioned. Further, the upper body 11 of the static shaft shoulder sleeve 1 is connected and fixed with the welding equipment through the flange ring 13, and then the lower body 12 is detachably connected with the upper body 11, so that the support sleeve 2 is stably arranged in the static shaft shoulder sleeve 1. Subsequently, during the welding operation, the driving part of the welding equipment is inserted into the driving slot 31 at the top end of the rotating drive shaft 3, driving the rotating drive shaft 3 to rotate at high speed, and at this time the static shaft shoulder sleeve 1 remains in a fixed state (i.e. a relatively static state). The rotating stirring needle 4 contacts the welding part of the driver shell, and the heat generated by friction softens the material in the welding area, and under the axial pressure of the rotating drive shaft 3, the softened material is stirred and extruded to form a weld. During the welding process, the bearing 5 ensures that the rotating drive shaft 3 rotates stably in the static shaft shoulder sleeve 1, avoiding shaking or eccentricity, and ensuring the positioning accuracy of the stirring needle 4. The support sleeve 2 provides stable support for the bearing 5, further improving the stability of the device. When it is necessary to replace the worn stirring needle 4 or adjust the welding parameters according to the thickness of the shell, the connection of the rotating drive shaft 3 and the stirring needle 4, the connection of the upper body 11 and the lower body 12, and the connection of the inner ring of the bearing 5 and the rotating drive shaft 3 can be directly detached, and after the replacement or adjustment of the parts is completed, the device can be reassembled, the whole process is convenient and efficient, and the downtime is effectively reduced.

[0034] The static shaft shoulder sleeve 1 further comprises a sleeve 14, the inner ring wall of the sleeve 14 is provided with a second inner thread (not shown) around the circumference, and one end is coaxially connected to the annular limiting plate 141. A plurality of vertical grooves 142 are formed around the outer ring wall of the sleeve 14. The design of the plurality of vertical grooves 142 is helpful for the operator to twist. The bottom end of the upper body 11 is provided with a second outer thread 110 around the circumference, and the top end of the lower body 12 is provided with a fixed ring plate 121 coaxially sleeved on the ring wall. The second inner thread is screwed with the second outer thread 110, the upper wall of the fixed ring plate 121 abuts against the bottom end of the lower body 12, and the lower wall of the fixed ring plate 121 abuts against the annular limiting plate 141. The upper body 11 and the lower body 12 are both provided with a plurality of heat dissipation holes 10 around the circumference. The design of the plurality of heat dissipation holes 10 is helpful for the structure to dissipate heat.

[0035] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

Claims

1. A friction stir welding stationary shoulder apparatus for drive housing welds, characterized by, The utility model relates to a static shaft shoulder sleeve, a rotating drive shaft and a bearing, and belongs to the field of welding equipment. The static shaft shoulder sleeve comprises an upper body sleeve and a lower body sleeve, one end of the upper body sleeve is coaxially connected with a flange ring for connecting a welding equipment, and the other end is detachably connected with the lower body sleeve, the top end of the lower body sleeve is coaxially connected with a support sleeve, and the bottom is provided with an axial through hole, and the support sleeve is located in the static shaft shoulder sleeve. The rotating drive shaft is provided with a drive slot at the top end for inserting the welding equipment, the rotating drive shaft is sleeved in the static shaft shoulder sleeve, and a stirring needle is detachably connected at the bottom end, and the stirring needle passes through the axial through hole. The outer ring of the bearing is fixedly connected with the inner wall of the support sleeve, and the inner ring is detachably connected with the rotating drive shaft.

2. The friction stir welding stationary shoulder apparatus for drive housing welding of claim 1, wherein, The inner ring of the bearing is provided with a first internal thread, and the outer ring wall of the rotating drive shaft is provided with a first external thread, and the first external thread is screwed with the first internal thread.

3. The friction stir welding stationary shoulder apparatus for drive housing welding of claim 1, wherein, The drive slot is a cross slot or a straight slot.

4. The friction stir welding stationary shoulder apparatus for drive housing welding of claim 1, wherein, The static shaft shoulder sleeve further comprises a sleeve, the inner ring wall of the sleeve is provided with a second internal thread, and one end is coaxially connected with a ring limiting plate. The bottom end of the upper body sleeve is provided with a second external thread, and the top end of the lower body sleeve is coaxially sleeved with a fixed ring plate. The second internal thread is screwed with the second external thread, the upper wall of the fixed ring plate abuts against the bottom end of the lower body sleeve, and the lower wall abuts against the ring limiting plate.

5. The friction stir welding stationary shoulder apparatus for drive housing welds of claim 4, wherein, The outer ring wall of the sleeve is provided with a plurality of vertical grooves.

6. The friction stir welding stationary shoulder apparatus for drive housing welds of claim 1, wherein, The upper body sleeve and the lower body sleeve are both provided with a plurality of heat dissipation holes.

7. A friction stir welding stationary shoulder apparatus for drive housing welding as defined in any one of claims 1-6, characterized in that, Both ends of the upper body sleeve and one end of the lower body sleeve are open. The end of the lower body sleeve away from the opening is provided with the axial through hole.

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