Friction stir welding fixture for electric control box

Abstract

The utility model discloses a friction stir welding fixture suitable for an electric control box, comprising a base and a contour support platform and a positioning and clamping mechanism all arranged on the base, the contour support platform comprising a support platform bottom plate and a plurality of support members installed on the base, each support member can adjust its installation height through a corresponding lifting and adjusting assembly, the top of each support member is formed with a support step surface protruding upward, and all the support step surfaces are located at the weld position where the electric control box and the water cooling chamber cover plate meet. The above friction stir welding fixture suitable for an electric control box is adopted, the contour support platform is composed of a plurality of support members that can be adjusted in height, so that the height of each support member can be adaptively fine-tuned according to the situation of the current batch of electric control boxes and the water cooling chamber cover plates, ensuring that the weld position of the electric control box and the water cooling chamber cover plate is very closely and reliably supported on each support step surface, thereby ensuring the welding quality of subsequent friction stir welding.

Description

Technical Field

[0001] The utility model relates to the technical field of stir friction welding fixtures, in particular to a stir friction welding fixture suitable for an electric control box. Background Art

[0002] At present, a water-cooling cavity is integrally die-casted in an electric control box formed by an aluminum alloy die-casting process, and a water-cooling flow channel is planned in the water-cooling cavity. Subsequently, a water-cooling cavity cover plate needs to be covered on the water-cooling cavity and welded by stir friction welding.

[0003] Please refer to the Chinese utility model patent with publication number CN212043119U. For the existing fixtures for friction stir welding of electric control boxes, hydraulic cylinders or air cylinders are used to position the welds of the electric control box and the water cooling chamber cover to ensure the welding quality of friction stir welding.

[0004] However, the profiling support platform used by the above fixtures to support the electric control box and the water cooling chamber cover is a fixed structure. Each batch of die castings may have slight differences, resulting in differences in the weld position of the electric control box and the water cooling chamber cover and the fit of the profiling support platform. If the fit between the batch of die castings and the profiling support platform is not good, the quality of the friction stir welding will inevitably be affected.

[0005] Solving the above problems has become a top priority. Utility Model Content

[0006] In view of this, the utility model provides a friction stir welding fixture suitable for an electric control box.

[0007] The technical solution is as follows:

[0008] The first aspect of the present application relates to a stir friction welding fixture suitable for an electric control box, comprising a base and a contoured support platform and a positioning and clamping mechanism both arranged on the base, the contoured support platform comprising a support platform base plate installed on the base and a plurality of support members installed on the support platform base plate through a lifting and adjusting assembly, each support member can adjust its installation height through a corresponding lifting and adjusting assembly, the top of each support member is formed with a support step surface protruding upward, and all the support step surfaces are located at the weld position where the electric control box and the water-cooling chamber cover are connected.

[0009] The above-mentioned friction stir welding fixture suitable for the electric control box is adopted, and the contoured support table is composed of a plurality of support members that can be adjusted in height, so that the height of each support member can be adaptively fine-tuned according to the conditions of the electric control boxes and the water-cooling chamber cover plates of the current batch, ensuring that the weld positions of the electric control boxes and the water-cooling chamber cover plates are very closely and reliably supported on the step surfaces of each support, thereby ensuring the welding quality of subsequent friction stir welding.

[0010] In some embodiments, a plurality of bolt holes are provided on the bottom plate of the support platform, at least one of the bolt holes is provided under each support member, and bolt through holes are provided on each support member corresponding to each of the bolt holes located under it, and the lifting and adjusting assembly includes a plurality of locking bolts matched with the bolt holes and the bolt through holes, and heightening gaskets respectively provided on each support member in a one-to-one correspondence, and each locking bolt can be locked in the corresponding bolt hole after passing through the corresponding bolt through hole, so that each support member is fixed to the bottom plate of the support platform through the corresponding heightening gasket.

[0011] In some embodiments, strip-shaped clearance gaps matching the corresponding locking bolts are provided in parallel on the outer edge of one side of the heightening gasket.

[0012] In some embodiments, the positioning and clamping mechanism includes a plurality of electric control box positioning components for positioning the electric control box, a plurality of electric control box limiting components for limiting the electric control box, a plurality of electric control box clamping components for pressing the electric control box on all supporting step surfaces, and a plurality of cover plate clamping components for pressing the water cooling chamber cover plate on all supporting step surfaces. Each electric control box positioning component, each electric control box limiting component, each electric control box clamping component and each cover plate clamping component are circumferentially distributed around the contoured support platform.

[0013] In some embodiments, the electric control box positioning assembly includes a positioning pin seat installed on the base and a positioning pin installed on the top of the positioning pin seat so as to extend upward.

[0014] In some embodiments, the electric control box limit assembly includes a limit block mounting seat installed on the base and a limit block vertically installed on a side of the limit block mounting seat close to the contoured support platform.

[0015] In some embodiments, a side of the upper end of the limit block close to the contour support platform has a guiding slope that gradually tilts from top to bottom toward a direction close to the contour support platform.

[0016] In some embodiments, the electric control box pressing assembly includes a first rotary pressing hydraulic cylinder vertically mounted on a base and a first rotary pressing arm capable of rotating and pressing down driven by a piston rod of the first rotary pressing hydraulic cylinder.

[0017] In some embodiments, the cover plate clamping assembly includes a second rotary pressing hydraulic cylinder vertically installed on the base and a second rotary pressing arm capable of rotating and pressing down driven by the piston rod of the second rotary pressing hydraulic cylinder, and a downwardly extending pressure head is installed at the outer end of the second rotary pressing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of using a friction stir welding fixture to fix the electric control box and the water cooling chamber cover to be welded;

[0019] Figure 2 It is a structural schematic diagram of the friction stir welding fixture;

[0020] Figure 3 The oil circuit diagram of each electric control box clamping assembly and each cover plate clamping assembly;

[0021] Figure 4 is a schematic diagram of the structure of the support member;

[0022] Figure 5 It is a structural schematic diagram of the bottom plate of the support platform;

[0023] Figure 6 It is a schematic diagram of the structure of the heightening gasket. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with embodiments and drawings.

[0025] like Figure 1-Figure 6 As shown, a friction stir welding fixture suitable for an electric control box mainly comprises a base 1, a contour support platform 2 and a positioning and clamping mechanism, wherein the contour support platform 2 and the positioning and clamping mechanism are both arranged on the base 1.

[0026] In this embodiment, the contoured support platform 2 includes a support platform bottom plate 2a and a plurality of support members 2b. The support platform bottom plate 2a is detachably mounted on the base 1 by bolts, and each support member 2b is mounted on the support platform bottom plate 2a by a lifting and adjusting assembly, so each support member 2b can adjust its installation height by a corresponding lifting and adjusting assembly, and each support member 2b has a support step surface 2b1 protruding upward on the top, and all the support step surfaces 2b1 are located at the weld 5 where the electric control box 3 and the water-cooling chamber cover 4 are connected. The welding head of the stir friction welding stirs and rubs the weld 5, so that the electric control box 3 and the water-cooling chamber cover 4 can be welded into one.

[0027] Therefore, the contoured support platform 2 is composed of a plurality of support members 2b that can be adjusted in height, so that the height of each support member 2b can be adaptively fine-tuned according to the conditions of the electric control box 3 and the water-cooling chamber cover plate 4 cast in the current batch, ensuring that the weld 5 of the electric control box 3 and the water-cooling chamber cover plate 4 is very closely and reliably supported on each support step surface 2b1, thereby ensuring the welding quality of subsequent stir friction welding.

[0028] See also Figure 2 as well as Figure 4-Figure 6A plurality of bolt holes 2a1 are provided on the bottom plate 2a of the support platform, and at least one bolt hole 2a1 is provided under each support member 2b. In this embodiment, two bolt holes 2a1 are provided under each support member 2b, which not only ensures the reliable installation of the support member 2b, but also uses relatively few locking bolts 6 to ensure assembly efficiency.

[0029] Correspondingly, the support members 2b are provided with bolt holes 2b2 corresponding to the bolt holes 2a1 located below them, and the lifting and adjusting assembly includes a plurality of locking bolts 6 adapted to the bolt holes 2a1 and the bolt holes 2b2, and heightening washers 7 respectively arranged on the support members 2b in a one-to-one correspondence. After each locking bolt 6 passes through the corresponding bolt hole 2b2, it can be locked in the corresponding bolt hole 2a1, so that each support member 2b is fixed on the support platform bottom plate 2a through the corresponding heightening washers 7. Therefore, by replacing heightening washers 7 of different thicknesses or changing the number of heightening washers 7 at the bottom of each support member 2b, the installation height of the support member 2b can be finely adjusted, so that all the support step surfaces 2b1 are as close to the electric control box 3 and the water-cooling chamber cover plate 4 as possible, thereby improving the welding quality of subsequent friction stir welding.

[0030] For further information, see Figure 6 On one side outer edge of the heightening gasket 7, strip-shaped clearance notches 7a that are compatible with the corresponding locking bolts 6 are opened in parallel with each other, so that the heightening gasket 7 can be replaced by pulling and inserting when the locking bolts 6 are loosened and the locking bolts 6 are not removed, thereby improving the adjustment efficiency and convenience of the installation height of the support member 2b.

[0031] See also Figure 1 and Figure 2 The positioning and clamping mechanism includes a plurality of electric control box positioning components 8, a plurality of electric control box limiting components 9, a plurality of electric control box clamping components 10 and a plurality of cover plate clamping components 11. Each electric control box positioning component 8, each electric control box limiting component 9, each electric control box clamping component 10 and each cover plate clamping component 11 are distributed around the contour support platform 2 along the circumferential direction. Each electric control box positioning component 8 cooperates with each other to position the electric control box 3, each electric control box limiting component 9 cooperates with each other to limit the electric control box 3, each electric control box clamping component 10 cooperates with each other to support the electric control box 3 tightly on all supporting step surfaces 2b1, and each cover plate clamping component 11 cooperates with each other to support the water cooling chamber cover plate 4 tightly on all supporting step surfaces 2b1. Through such a design, the reliable positioning and clamping of the electric control box 3 and the water cooling chamber cover plate 4 are guaranteed, thereby ensuring the welding quality of the subsequent friction stir welding.

[0032] In this embodiment, the electric control box positioning assembly 8 includes a positioning pin seat 8a installed on the base 1 and a positioning pin 8b installed on the top of the positioning pin seat 8a extending upward, and the positioning pin 8b cooperates with the hole position of the electric control box 3 to realize the positioning of the electric control box 3. Among them, the positioning pin seat 8a is locked on the base 1 by bolts, which is simple and reliable. The positioning pin seat 8a and the positioning pin 8b are integrally formed, which not only ensures the structural strength, but also ensures the positioning accuracy of the positioning pin 8b.

[0033] In this embodiment, the electric control box limit assembly 9 includes a limit block mounting seat 9a installed on the base 1 and a limit block 9b vertically installed on the limit block mounting seat 9a close to the side of the contour support platform 2. Through the cooperation of the limit blocks 9b, the electric control box 3 can be limited from the circumferential direction. Among them, the limit block mounting seat 9a is locked on the base 1 by bolts, and the lower end of the limit block 9b is locked on the limit block mounting seat 9a by bolts, which is simple and reliable.

[0034] Furthermore, the upper end of the limit block 9b has a guide slope 9b1 on one side close to the contoured support platform 2, which is gradually inclined from top to bottom toward the contoured support platform 2. By setting the guide slope 9b1, the placement of the electric control box 3 can be more convenient and the jamming problem can be avoided.

[0035] In this embodiment, the electric control box pressing assembly 10 includes a first rotary pressing hydraulic cylinder 10a vertically mounted on the base 1 and a first rotary pressing arm 10b capable of rotating and pressing down driven by the piston rod of the first rotary pressing hydraulic cylinder 10a.

[0036] When the first rotating pressing hydraulic cylinder 10a drives the first rotating pressing arm 10b to rotate toward the direction of approaching the electric control box 3 and press downward, the first rotating pressing arm 10b can reliably press the electric control box 3 downward.

[0037] When the first rotary pressing hydraulic cylinder 10 a drives the first rotary pressing arm 10 b to rotate in a direction away from the electric control box 3 and push up, the first rotary pressing arm 10 b releases the electric control box 3 .

[0038] Similarly, the cover plate clamping assembly 11 includes a second rotary pressing hydraulic cylinder 11a vertically mounted on the base 1 and a second rotary pressing arm 11b capable of rotating and pressing downward driven by the piston rod of the second rotary pressing hydraulic cylinder 11a, and a downwardly extending pressure head 11c is mounted on the outer end of the second rotary pressing arm 11b.

[0039] When the second rotary pressing hydraulic cylinder 11 a drives the second rotary pressing arm 11 b to rotate toward the direction of approaching the electric control box 3 and press downward, the pressing head 11 c can reliably press the electric control box 3 downward.

[0040] When the second rotary pressing hydraulic cylinder 11 a drives the second rotary pressing arm 11 b to rotate away from the electric control box 3 and push up, the pressing head 11 c releases the electric control box 3 .

[0041] By adopting the first rotary downward pressing hydraulic cylinder 10a and the second rotary downward pressing hydraulic cylinder 11a, not only can sufficient downward pressure be applied to ensure the reliability of clamping, but the rotation method can also play a role in avoiding the electric control box 3 and the water-cooling chamber cover 4. Not only can they play a role in avoiding the electric control box 3 and the water-cooling chamber cover 4 when taking and placing them, but they can also play a role in avoiding the welding seam 5 when the stirring head is welding.

[0042] See also Figure 2 and Figure 3 A hydraulic oil circuit 12 is integrated inside the base 1, and each first rotary pressing hydraulic cylinder 10a and each second rotary pressing hydraulic cylinder 11a are connected to the hydraulic oil circuit 12, thereby improving the integration of the tooling.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A friction stir welding fixture suitable for an electric control box, comprising a base (1), a contoured support platform (2) and a positioning and clamping mechanism both arranged on the base (1), characterized in that: The contoured support platform (2) comprises a support platform bottom plate (2a) mounted on a base (1) and a plurality of support members (2b) mounted on the support platform bottom plate (2a) via a lifting and adjusting assembly, wherein each support member (2b) can be adjusted in installation height via a corresponding lifting and adjusting assembly, and each support member (2b) has a support step surface (2b1) formed on the top thereof protruding upward, and all the support step surfaces (2b1) are located at the position of a weld (5) where the electric control box (3) and the water-cooling chamber cover plate (4) are connected.

2. The friction stir welding fixture suitable for an electric control box according to claim 1, characterized in that: The support platform bottom plate (2a) is provided with a plurality of bolt holes (2a1), and each support member (2b) is provided with at least one of the bolt holes (2a1). The support members (2b) are provided with bolt through holes (2b2) ​​corresponding to the bolt holes (2a1) located below them. The lifting and adjusting assembly comprises a plurality of locking bolts (6) matched with the bolt holes (2a1) and the bolt through holes (2b2), and heightening washers (7) respectively arranged on each support member (2b) in a one-to-one correspondence. After each locking bolt (6) passes through the corresponding bolt through hole (2b2), it can be locked in the corresponding bolt hole (2a1), so that each support member (2b) is fixed to the support platform bottom plate (2a) through the corresponding heightening washers (7).

3. The friction stir welding fixture for electric control box according to claim 2 is characterized in that: On one side outer edge of the heightening gasket (7), strip-shaped clearance notches (7a) are provided in parallel with each other and are matched with corresponding locking bolts (6).

4. The friction stir welding fixture suitable for an electric control box according to claim 1, characterized in that: The positioning and clamping mechanism comprises a plurality of electric control box positioning assemblies (8) for positioning the electric control box (3), a plurality of electric control box limiting assemblies (9) for limiting the position of the electric control box (3), a plurality of electric control box clamping assemblies (10) for clamping the electric control box (3) on all supporting step surfaces (2b1), and a plurality of cover plate clamping assemblies (11) for clamping the water cooling chamber cover plate (4) on all supporting step surfaces (2b1). Each of the electric control box positioning assemblies (8), each of the electric control box limiting assemblies (9), each of the electric control box clamping assemblies (10), and each of the cover plate clamping assemblies (11) are distributed around the contoured support platform (2) along the circumferential direction.

5. The friction stir welding fixture suitable for an electric control box according to claim 4, characterized in that: The electric control box positioning assembly (8) comprises a positioning pin seat (8a) mounted on the base (1) and a positioning pin (8b) mounted on the top of the positioning pin seat (8a) extending upward.

6. The friction stir welding fixture for electric control box according to claim 4 is characterized in that: The electric control box limit assembly (9) comprises a limit block mounting seat (9a) mounted on the base (1) and a limit block (9b) vertically mounted on the limit block mounting seat (9a) close to the contour support platform (2).

7. The friction stir welding fixture for electric control box according to claim 6, characterized in that: The upper end of the limit block (9b) has a side close to the contour support platform (2) with a guiding inclined surface (9b1) which gradually inclines from top to bottom towards a direction close to the contour support platform (2).

8. The friction stir welding fixture for electric control box according to claim 4 is characterized in that: The electric control box clamping assembly (10) comprises a first rotary pressing hydraulic cylinder (10a) vertically mounted on the base (1) and a first rotary pressing arm (10b) capable of rotating and pressing downwards driven by the piston rod of the first rotary pressing hydraulic cylinder (10a).

9. The friction stir welding fixture for electric control box according to claim 4, characterized in that: The cover plate pressing assembly (11) comprises a second rotary pressing hydraulic cylinder (11a) vertically mounted on the base (1) and a second rotary pressing arm (11b) capable of rotating and pressing downwards driven by a piston rod of the second rotary pressing hydraulic cylinder (11a), wherein a downwardly extending pressing head (11c) is mounted on the outer end of the second rotary pressing arm (11b).

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