Friction stir welding device for horizontal motor casing

Abstract

The utility model relates to the field of friction stir welding, in particular to a friction stir welding device for a horizontal motor casing, which comprises a positioning seat driven by a power source to rotate, a barrel to be welded is coaxially fixed on the positioning seat, and a first clamping piece for clamping the barrel along the axial direction of the barrel is arranged on the positioning seat. The second clamping piece is used for clamping the barrel in the radial direction of the barrel; and a lower supporting seat for supporting the barrel from bottom to top is arranged below the positioning seat and is in rolling friction fit with the barrel. According to the utility model, the arc-shaped welding seam and the axial welding seam of the motor casing can be quickly welded.

Description

Technical Field

[0001] The utility model relates to the field of friction stir welding, in particular to a horizontal motor shell friction stir welding device. Background Art

[0002] Integrally water-cooled motor shells are widely used in the fields such as the production of motors for new energy vehicles. During the processing and production of the motor shells, conventional casting and integral forming schemes are usually used. When large-diameter motor shells need to be produced, due to the large inner diameter of the motor shell and the thin wall of the motor shell, deformation is likely to occur. When the casting and integral forming production scheme is still adopted, the overall deformation of the motor shell is likely to be caused during the extrusion process of production, and the processing quality cannot meet the requirements.

[0003] To solve the above problems, as described in the existing production method such as the patent number "CN219561930U", after the cylinder body of the motor shell is extruded and formed in sections, it is then spliced by welding. During the welding process, the motor shell is vertically placed and clamped. After being clamped and fixed, the annular weld and axial weld of the sectional motor shell are manually completed. The long-time manual welding of large-size welds is time-consuming and laborious, and the welding efficiency is relatively low. Therefore, it needs to be solved urgently. Content of the Utility Model

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a horizontal motor shell friction stir welding device. The utility model can realize the rapid welding of the arc weld and axial weld of the motor shell.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A horizontal motor shell friction stir welding device includes a positioning seat driven by a power source to rotate. The cylinder body to be welded is coaxially fixed on the positioning seat. A first clamping member for applying a clamping action to the cylinder body along the axial direction of the cylinder body and a second clamping member for applying a clamping action to the cylinder body along the radial direction of the cylinder body are arranged on the positioning seat; a lower support seat for supporting the cylinder body from bottom to top is arranged below the positioning seat, and the lower support seat and the cylinder body form a rolling friction fit.

[0007] As a further scheme of the utility model: the first clamping member includes a rotating back plate driven by a power source to rotate. A positioning shaft is coaxially arranged on the rotating back plate. A clamping plate is coaxially arranged on the positioning shaft, and the clamping plate is fixed after slidingly cooperating with the positioning shaft along the axial direction of the positioning shaft. The clamping plate and the rotating back plate cooperate to clamp and fix the cylinder body to be welded along the axial direction.

[0008] As a further scheme of the utility model: detachably arranged inner support shafts are uniformly arranged along the circumferential direction on the rotating back plate. The inner support shafts are arranged along the direction parallel to the axis of the positioning seat, and the shaft body of the inner support shaft abuts against the inner wall of the cylinder body to be welded.

[0009] As a further solution of the present utility model: a guiding hole corresponding to the inner support shaft is radially formed on the clamping plate for the inner support shaft to pass through, and the width of the guiding hole corresponds to the diameter of the inner support shaft.

[0010] As a further solution of the present utility model: a locking nut in threaded fit with the positioning shaft is arranged on the positioning shaft, and the clamping plate is pressed and fixed by the abutment of the locking nut.

[0011] As a further solution of the present utility model: a transverse support seat is further arranged between the rotating back plate and the clamping plate, and the transverse support seat corresponds to the axial weld position of the cylinder to be welded.

[0012] As a further solution of the present utility model: the second clamping member includes outer pressing plates uniformly arranged along the circumferential direction of the rotating back plate, and pressing bolts are radially arranged on the outer pressing plates along the cylinder to be welded, and the ends of the pressing bolts abut against the outer wall of the cylinder to be welded.

[0013] As a further solution of the present utility model: the lower support seat includes a support shaft arranged along the direction parallel to the axis of the positioning seat, and a support bearing is coaxially fixed on the support shaft, and the outer ring of the support bearing forms a rolling friction fit with the cylinder to be welded.

[0014] As a further solution of the present utility model: at least two groups of the lower support seats are arranged and are evenly spaced along the circumferential direction of the cylinder below the positioning seat; at least two groups of support bearings are arranged on the support shaft.

[0015] As a further solution of the present utility model: the positioning seat and the lower support seat are both fixed on the base, and the positioning seat is suspended above the lower support seat, and the power source is a driving motor, and the positioning seat is driven by the driving motor to rotate.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The motor housing of the present utility model is horizontally arranged, and the cylinder is supported by the lower support seat. Only a small-power motor is required to drive the positioning seat to rotate, and the motor housing is driven to rotate synchronously by the positioning seat; during the rotation process, the cylinder of the motor housing itself is simultaneously subjected to clamping forces in the axial and radial directions, and the clamping is stable; when performing circumferential seam welding, the driving motor drives the positioning seat to rotate, and the welding equipment moves to the circumferential seam. While the positioning seat drives the cylinder to rotate, the circumferential seam welding is completed. When axial seam welding is required, the driving motor stops working to ensure that the axial welding area corresponding to the transverse support seat corresponds to the position of the welding equipment. By translating the welding equipment or moving the head of the welding equipment axially, the axial seam welding can be completed; through the switching of the above working states, the rapid welding of the arc-shaped seam and the axial seam of the motor housing can be realized.

[0018] 2. The utility model is provided with a clamping plate on the positioning shaft, which is slidably matched with the positioning shaft. After replacing the motor housing with different sizes, by moving the clamping plate along the axial direction of the positioning shaft, the motor housing can be axially clamped and fixed under the cooperation of the clamping plate and the rotating back plate. The clamping plate itself is locked by a locking nut to avoid axial displacement. The radial locking of the cylinder body is realized by the pressing bolts on the outer pressing plate. The two-way locking and fixing greatly improves the stability during the rotation welding of the cylinder body.

[0019] 3. When the utility model fixes the cylinder body, the inner positioning of the cylinder body is carried out by the abutment of multiple groups of inner support shafts against the inner wall of the cylinder body. While positioning the cylinder body, the stability during the welding process of the cylinder body is further improved. By replacing the inner support shafts with different sizes, the welding of cylinders with different sizes can be adapted. The guiding holes provided on the clamping plate can allow the inner support shafts to pass through to adapt to cylinders with different lengths.

[0020] 4. The utility model realizes the multi-point fixing of the cylinder body by arranging multiple groups of lower support seats. Through the rolling friction cooperation between the support bearings and the outer wall of the cylinder body, a supporting force is applied to the cylinder body during the rotation of the cylinder body to avoid excessive load on the motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the utility model.

[0022] Figure 2 is a schematic structural diagram of the positioning seat in the utility model.

[0023] In the figure:

[0024] 1. Positioning seat; 11. Rotating back plate;

[0025] 111. Outer pressing plate; 112. Inner support shaft; 113. Horizontal support seat;

[0026] 12. Clamping plate; 121. Guiding hole; 13. Positioning shaft; 131. Locking nut;

[0027] 2. Base; 3. Lower support seat; 31. Support shaft; 32. Support bearing; 4. Driving motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1-2, in the embodiment of the present utility model, a friction stir welding device for a horizontal motor housing includes a base 2, on which a motor support is provided to fix a driving motor 4 as a power source. The motor shaft of the driving motor 4 drives a positioning seat 1 to rotate. The motor shaft can be directly connected to the positioning seat 1 or commutatively connected to the positioning seat 1 through a speed reducer. The positioning seat 1 includes a disc-shaped rotating back plate 11. Inner support shafts 112 are evenly arranged along the circumferential direction of the body of the rotating back plate 11. The inner support shafts 112 are arranged along the direction parallel to the axis of the rotating back plate 11, and the inner support shafts 112 form a detachable fit with the rotating back plate 11, so as to adapt to cylinders to be welded with different inner diameters by replacing the size of the inner support shafts 112 or adjusting the positions of the inner support shafts 112.

[0030] The cylinder to be welded moves along the axis direction of the rotating back plate 11 until the cylinder mouth abuts against the body of the rotating back plate 11. At this time, each inner support shaft 112 just abuts against the inner wall of the cylinder to be welded, so as to form an inner support for the cylinder to be welded.

[0031] A positioning shaft 13 is coaxially arranged on the rotating back plate 11. A clamping plate 12 is coaxially sleeved on the outer ring of the positioning shaft 13 and is in sliding fit with the shaft body of the positioning shaft 13. A locking nut 131 that is in threaded fit with the positioning shaft 13 is arranged on the positioning shaft 13. By screwing the locking nut 131, the clamping plate 12 can be driven to slide axially along the positioning shaft 13 until the clamping plate 12 and the rotating back plate 11 clamp and fix the cylinder to be welded axially.

[0032] A plurality of groups of guide holes 121 are evenly opened along the radial direction on the clamping plate 12. The number and positions of the guide holes 121 correspond to those of the inner support shafts 112, so as to allow the inner support shafts 112 to pass through and avoid position interference between the clamping plate 12 and the inner support shafts 112.

[0033] A transverse support seat 113 arranged along the direction parallel to the axis of the cylinder is further provided between the clamping plate 12 and the rotating back plate 11. The transverse support seat 113 can be replaced to adapt to products of different sizes. The transverse support seat 113 corresponds to the axial weld position of the cylinder to be welded and is located directly below the axial weld position to play a supporting role.

[0034] To further improve the stability of the support, outer pressing plates 111 are evenly arranged along the circumferential direction on the rotating back plate 11. The outer pressing plates 111 are suspended along the direction parallel to the axis of the cylinder. Pressing bolts are arranged on the outer pressing plates 111. The pressing bolts are arranged along the radial direction of the cylinder to be welded. After being screwed, they abut against the outer wall of the cylinder, so as to apply a radial pressing force to the cylinder.

[0035] To support the cylindrical body during welding, a lower support base 3 is also provided on the base 2 and is located directly below the positioning seat 1. Preferably, two sets of the lower support bases 3 are arranged symmetrically on the left and right. The lower support base 3 includes a support shaft 31 and support bearings 32 coaxially fixed at both ends of the support shaft 31. The support shaft 31 is parallel to the axis of the cylindrical body. When the positioning seat 1 rotates, the outer rings of the support bearings 32 are in rolling friction cooperation with the outer wall of the cylindrical body, applying a supporting action from bottom to top to the cylindrical body.

[0036] When performing circumferential welding, the driving motor 4 drives the positioning seat 1 to rotate. The welding equipment moves to the circumferential weld. While the positioning seat 1 drives the cylindrical body to rotate, the circumferential welding is completed. When axial welding is required, the driving motor 4 stops working to ensure that the axial welding area corresponding to the transverse support seat 113 corresponds to the position of the welding equipment. By translating the welding equipment or moving the head of the welding equipment axially, the axial welding can be completed.

[0037] The basic principles of the present application have been described in combination with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. Additionally, the specific details disclosed above are only for illustrative and easy-to-understand purposes and are not limitations. The above details do not limit the present application to necessarily adopt the above specific details to be implemented.

[0038] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any way. Words such as "including", "comprising", "having", etc. are open-ended terms meaning "including but not limited to" and can be used interchangeably with each other. The word "or" and "and" used here refer to the word "and / or" and can be used interchangeably with each other unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to" and can be used interchangeably with each other.

Claims

1. A horizontal motor housing friction stir welding device, characterized in that: The invention comprises a positioning seat (1) which is driven to rotate by a power source, a cylinder to be welded is coaxially fixed on the positioning seat (1), a first clamping member which applies a clamping action to the cylinder along the axial direction of the cylinder, and a second clamping member which applies a clamping action to the cylinder along the radial direction of the cylinder is provided on the positioning seat (1); a lower support seat (3) which supports the cylinder from bottom to top is provided below the positioning seat (1), and the lower support seat (3) forms a rolling friction fit with the cylinder.

2. A horizontal motor casing friction stir welding device according to claim 1, characterized in that: The first clamping member comprises a rotating back plate (11) driven to rotate by a power source, a positioning shaft (13) being coaxially arranged on the rotating back plate (11), a clamping plate (12) being coaxially arranged on the positioning shaft (13), and the clamping plate (12) being fixed after slidingly fitting with the positioning shaft (13) along the axial direction of the positioning shaft (13), and the clamping plate (12) and the rotating back plate (11) are fitted to clamp and fix the cylinder to be welded along the axial direction.

3. A horizontal motor casing friction stir welding device according to claim 2, characterized in that: The rotating back plate (11) is evenly provided with detachable inner support shafts (112) along the circumferential direction. The inner support shafts (112) are arranged in a direction parallel to the axis of the positioning seat (1). The shaft body of the inner support shaft (112) abuts against the inner wall of the cylinder to be welded.

4. A horizontal motor casing friction stir welding device according to claim 3, characterized in that: A guide hole (121) corresponding to the inner support shaft (112) is radially opened on the clamping plate (12) for the inner support shaft (112) to pass through, and the width of the guide hole (121) corresponds to the diameter of the inner support shaft (112).

5. The horizontal motor casing friction stir welding device according to claim 2, characterized in that: The positioning shaft (13) is provided with a locking nut (131) threadably matched with the positioning shaft (13), and the clamping plate (12) is abutted, pressed and fixed by the locking nut (131).

6. A horizontal motor casing friction stir welding device according to any one of claims 2 to 5, characterized in that: A transverse support seat (113) is also provided between the rotating back plate (11) and the clamping plate (12), and the transverse support seat (113) corresponds to the axial weld position of the cylinder to be welded.

7. A horizontal motor casing friction stir welding device according to any one of claims 2 to 5, characterized in that: The second clamping member comprises an outer pressure plate (111) uniformly arranged along the circumference of the rotating back plate (11), and clamping bolts are arranged on the outer pressure plate (111) along the radial direction of the cylinder to be welded, and the end of each clamping bolt abuts against the outer wall of the cylinder to be welded.

8. A horizontal motor casing friction stir welding device according to any one of claims 1 to 5, characterized in that: The lower support seat (3) comprises a support shaft (31) arranged along the axial direction of the parallel positioning seat (1), a support bearing (32) is coaxially fixed on the support shaft (31), and the outer ring of the support bearing (32) forms a rolling friction fit with the cylinder to be welded.

9. The horizontal motor casing friction stir welding device according to claim 8, characterized in that: The lower support seats (3) are provided with at least two groups, which are evenly spaced and arranged along the circumference of the cylinder below the positioning seat (1); and the support shaft (31) is provided with at least two groups of support bearings (32).

10. A horizontal motor casing friction stir welding device according to any one of claims 1 to 5, characterized in that: The positioning seat (1) and the lower support seat (3) are both fixed on the base (2), and the positioning seat (1) is suspended above the lower support seat (3). The power source is a driving motor (4), and the positioning seat (1) is driven to rotate by the driving motor (4).

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