Spiral expansion device for correcting aluminum alloy case
The length change is achieved by rotating the screw of the spiral expansion device, and the linear motion of the support mechanism solves the assembly difficulties caused by welding deformation of aluminum alloy chassis, realizing a simple and efficient straightening operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-21
AI Technical Summary
During the argon arc welding process, aluminum alloy chassis have a large heat-affected zone and suffer severe shrinkage and deformation after welding, resulting in a reduction in the internal cavity size and affecting the assembly of internal components. Existing manual alignment operations are complex and difficult to guarantee accuracy.
Design a spiral expansion device that achieves length change by rotating a screw inside a threaded tube, and uses a support mechanism to reciprocate linearly on the inner wall of the chassis to reduce rotational friction of the support block and achieve expansion and shaping of the inner cavity of the chassis.
It effectively solves the problem of shrinkage and deformation during argon arc welding affecting assembly, ensuring the precise assembly of internal components of the aluminum alloy chassis. It is easy to operate and suitable for chassis alignment of different size ranges.
Smart Images
Figure CN224143211U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of chassis straightening devices, and specifically relates to a spiral expansion device for straightening aluminum alloy chassis. Background Technology
[0002] Aluminum alloy chassis is a common structural form for electronic equipment. The chassis is usually welded from four or five aluminum plate structural components. The current welding process is argon arc welding. Due to the large heat-affected zone during the welding process of aluminum alloy argon arc welding chassis, the shrinkage and deformation after welding are severe. In some areas, the internal cavity size is reduced due to shrinkage and deformation, which affects the assembly of internal parts and components of the chassis.
[0003] To meet the requirements of chassis assembly, manual hammering is usually used to straighten the chassis after welding. This is a labor-intensive process that requires high operator skills. However, there are still assembly difficulties in terms of precision. To solve the chassis assembly problem, manual filing (filing the chassis or another component) is always used in the later stages to meet the assembly requirements. Utility Model Content
[0004] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a spiral expansion device for shaping aluminum alloy chassis. The spiral mechanism converts rotational motion into linear motion, pushing the deformed parts of the chassis outward, reducing the impact of shrinkage deformation during argon arc welding, and ensuring the assembly of internal components of the aluminum alloy argon arc welding chassis. It can be used for aluminum alloy argon arc welding chassis of different sizes.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A spiral expansion device for shaping aluminum alloy chassis includes a screw, which includes a solid section and a threaded section. The solid section is connected to a connecting rod via a locking mechanism, and the threaded section is threadedly connected to a threaded tube. The other end of the threaded tube and the other end of the connecting rod are both fitted with a support mechanism for supporting the chassis inner wall.
[0007] This invention utilizes a screw rotating within a threaded tube to lengthen or shorten the device. The length variation range can be achieved by altering the lengths of the screw and the threaded tube, thus meeting the calibration requirements of chassis of varying sizes. Since two support mechanisms are respectively fitted onto the ends of the threaded tube and the connecting rod, these support mechanisms can rotate relative to their respective ends. Therefore, during rotation, the screw rotates, while the threaded tube, connecting rod, and their mounted support mechanisms all undergo linear reciprocating motion, preventing wear on the chassis's inner wall caused by friction from the rotating support blocks.
[0008] This invention can be used for the correction and expansion of aluminum alloy TIG welding machine housings with different internal cavity sizes within a range of 0.5mm. It is simple and easy to operate, effectively solving the impact of TIG welding shrinkage deformation on assembly and ensuring the assembly of internal components of the aluminum alloy TIG welding machine housing. This invention can also be used for the correction and expansion of housings with deformation greater than 0.5mm; however, this requires greater force to rotate the screw, or a tool can be used to rotate the screw.
[0009] In a preferred embodiment of this invention, the locking mechanism includes a connecting pin and a hexagonal socket screw. The connecting pin is inserted into the connection between the solid section and the connecting rod, and the hexagonal socket screw is fitted inside the connecting pin and threadedly connected to the solid section. The connecting pin connects the solid section and the connecting rod, and the hexagonal socket screw locks the connecting pin to the solid section, thereby reliably connecting the connecting rod to the solid section of the screw.
[0010] As a preferred embodiment of this utility model, a limiting ring is provided on the connecting pin, and a limiting step is provided at the end of the connecting rod near the solid section. The limiting ring and the limiting step cooperate with each other. When the hex socket screw is tightened, the limiting ring on the connecting pin and the limiting step on the connecting rod are pressed together to prevent the hex socket screw from loosening.
[0011] As a preferred embodiment of this utility model, an elastic washer and a flat washer are fitted onto the socket head cap screw, with the elastic washer and flat washer positioned between the nut of the socket head cap screw and the retaining ring of the connecting pin. The elastic washer and flat washer further improve the connection reliability of the socket head cap screw.
[0012] As a preferred embodiment of this utility model, the connecting rod has a cavity inside. The connecting pin and the internal hexagonal screw are inserted into the connecting rod from one end of the cavity and then connected to the solid section. Except for one end having a limiting step, the rest of the connecting rod has cavities of equal diameter, which facilitates the insertion of the connecting pin, internal hexagonal screw, elastic washer, and flat washer into the connecting rod, ensuring a reliable connection between the connecting rod and the solid section of the screw.
[0013] As a preferred embodiment of this utility model, the support mechanism includes a fixed block and a support block. The fixed block is sleeved on the end of the connecting rod or threaded pipe, and the support block is connected to the fixed block. The fixed block sleeved on the end of the connecting rod or threaded pipe allows the connecting rod or threaded pipe to rotate relative to the fixed block. When the screw is tightened, the support mechanisms at both ends will not rotate with the screw, thus avoiding wear on the inner wall of the chassis due to friction caused by the rotation of the support block.
[0014] In a preferred embodiment of this invention, a support ring is provided on the fixing block, and the support ring overlaps the end face of the connecting rod or threaded tube. The support ring and the end face of the connecting rod or threaded tube prevent the fixing block from being pressed into the connecting rod or threaded tube.
[0015] In a preferred embodiment of this invention, the support block and the fixing block are connected by a plurality of stainless steel combination screws. The support block has countersunk holes through which the stainless steel combination screws connect to the fixing block, preventing the stainless steel combination screws from protruding from the surface of the support block and thus preventing them from contacting the inner wall of the chassis.
[0016] In a preferred embodiment of this invention, a limiting groove is provided at one end of the support block facing the fixing block, and one end of the fixing block is fitted into the limiting groove. The limiting groove can limit the fixing block, ensuring that the support block and the fixing frame will not be misaligned, and ensuring that the device can be stably supported on the inner wall of the chassis.
[0017] The beneficial effects of this utility model are as follows:
[0018] 1. This invention utilizes a screw rotating within a threaded tube to lengthen or shorten the device. The range of length variation can be achieved by altering the lengths of the screw and the threaded tube, thus meeting the calibration requirements of chassis of varying sizes. Since two support mechanisms are respectively fitted onto the ends of the threaded tube and the connecting rod, these support mechanisms can rotate relative to both. Therefore, during rotation, the screw rotates, while the threaded tube, connecting rod, and their mounted support mechanisms all undergo linear reciprocating motion, preventing wear on the inner wall of the chassis due to friction from the rotating support blocks.
[0019] 2. This invention can be used for the correction and expansion of aluminum alloy TIG welding machine housings with different internal cavity sizes within a range of 0.5mm. It is simple and easy to operate, effectively solving the impact of TIG welding shrinkage deformation on assembly and ensuring the assembly of internal components of the aluminum alloy TIG welding machine housing. This invention can also be used for the correction and expansion of housings with deformation dimensions greater than 0.5mm. However, this requires greater force to rotate the screw, or a tool can be used to rotate the screw. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model.
[0021] In the diagram: 1-Screw; 2-Threaded tube; 3-Connecting rod; 4-Connecting pin; 5-Fixing block; 6-Supporting block; 7-Hex socket head cap screw; 11-Solid section; 12-Threaded section; 31-Limiting step; 32-Cavity; 41-Limiting ring; 51-Supporting ring; 61-Stainless steel combination screw; 62-Limiting groove; 71-Elastic washer; 72-Flat washer. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.
[0024] like Figure 1 As shown, the spiral expansion device for aluminum alloy chassis shaping in this embodiment includes a screw 1. The screw 1 includes a solid section 11 and a threaded section 12. The solid section 11 is connected to a connecting rod 3 through a locking mechanism. The threaded section 12 is threadedly connected to a threaded tube 2. The other end of the threaded tube 2 and the other end of the connecting rod 3 are both fitted with a support mechanism for supporting the inner wall of the chassis.
[0025] This invention utilizes the rotation of a screw 1 within a threaded tube 2 to lengthen or shorten the device. The range of length variation can be achieved by altering the lengths of the screw 1 and the threaded tube 2, thus meeting the calibration requirements of chassis of varying sizes. Since two support mechanisms are respectively fitted onto the ends of the threaded tube 2 and the connecting rod 3, these support mechanisms can rotate relative to both the threaded tube 2 and the connecting rod 3. Therefore, during rotation, the screw 1 rotates, while the threaded tube 2, the connecting rod 3, and their mounted support mechanisms all undergo linear reciprocating motion, preventing wear on the inner wall of the chassis caused by the rotational friction of the support block 6.
[0026] This invention can be used for the correction and expansion of aluminum alloy TIG welding machine housings with different internal cavity sizes within a range of 0.5mm. It is simple and easy to operate, effectively solving the impact of TIG welding shrinkage deformation on assembly and ensuring the assembly of internal components of the aluminum alloy TIG welding machine housing. This invention can also be used for the correction and expansion of housings with deformation dimensions greater than 0.5mm. During operation, a greater force is required to rotate screw 1, or a tool can be used to rotate screw 1.
[0027] Specifically, the locking mechanism includes a connecting pin 4 and an internal hexagon screw 7. The connecting pin 4 is inserted into the connection between the solid section 11 and the connecting rod 3. The internal hexagon screw 7 is sleeved inside the connecting pin 4 and threadedly connected to the solid section 11. The connecting pin 4 connects the solid section 11 and the connecting rod 3, and the internal hexagon screw 7 locks the connecting pin 4 to the solid section 11, thereby reliably connecting the connecting rod 3 to the solid section 11 of the screw 1.
[0028] To ensure reliable connection of the hex socket screw 7, a limiting ring 41 is provided on the connecting pin 4, and a limiting step 31 is provided at the end of the connecting rod 3 near the solid section 11. The limiting ring 41 and the limiting step 31 cooperate with each other. When the hex socket screw 7 is tightened, the limiting ring 41 on the connecting pin 4 and the limiting step 31 on the connecting rod 3 are pressed together to prevent the hex socket screw 7 from loosening.
[0029] The socket head cap screw 7 is fitted with an elastic washer 71 and a flat washer 72, which are located between the nut of the socket head cap screw 7 and the limiting ring 41 of the connecting pin 4. The elastic washer 71 and the flat washer 72 further improve the connection reliability of the socket head cap screw 7.
[0030] The connecting rod 3 has a cavity 32. The connecting pin 4 and the socket head cap screw 7 are inserted into the connecting rod 3 from one end of the cavity 32 and then connected to the solid section 11. Except for one end with a limiting step 31, the connecting rod 3 has cavities 32 of equal diameter, which facilitates the insertion of the connecting pin 4, socket head cap screw 7, elastic washer 71 and flat washer 72 into the connecting rod 3, ensuring a reliable connection between the connecting rod 3 and the solid section 11 of the screw 1.
[0031] Specifically, the support mechanism includes a fixed block 5 and a support block 6. The fixed block 5 is sleeved on the end of the connecting rod 3 or the threaded tube 2, and the support block 6 is connected to the fixed block 5. The fixed block 5 is sleeved on the end of the connecting rod 3 or the threaded tube 2, so that the connecting rod 3 or the threaded tube 2 and the fixed block 5 can rotate relative to each other. When the screw 1 is tightened, the support mechanisms at both ends will not rotate with the screw 1, thus avoiding wear on the inner wall of the chassis due to the rotational friction of the support block 6.
[0032] A support ring 51 is provided on the fixing block 5, and the support ring 51 overlaps the end face of the connecting rod 3 or the threaded tube 2. The support ring 51 and the end face of the connecting rod 3 or the threaded tube 2 prevent the fixing block 5 from being pressed into the connecting rod 3 or the threaded tube 2.
[0033] The support block 6 and the fixing block 5 are connected by a number of stainless steel combination screws 61. The support block 6 is provided with countersunk holes, through which the stainless steel combination screws 61 are connected to the fixing block 5, so as to prevent the stainless steel combination screws 61 from protruding from the surface of the support block 6, thereby preventing the stainless steel combination screws 61 from contacting the inner wall of the chassis.
[0034] The support block 6 has a limiting groove 62 at one end facing the fixing block 5, and one end of the fixing block 5 is fitted into the limiting groove 62. The limiting groove 62 can limit the fixing block 5, ensuring that the support block 6 and the fixing frame will not be misaligned, and ensuring that the device can be stably supported on the inner wall of the chassis.
[0035] The spiral expansion method for shaping aluminum alloy chassis includes the following steps:
[0036] S1: Depending on the size of the chassis cavity, rotate screw 1 counterclockwise or clockwise in advance to extend or shorten the device until it can be placed into the chassis;
[0037] S2: Place the device into the cavity of the chassis where the correction and expansion are required, rotate screw 1 counterclockwise, the device becomes longer, the support mechanisms at both ends press against the inner wall of the chassis, and apply uniform pressure to the inner wall of the chassis to produce correction and expansion.
[0038] S3: After inserting the corresponding product parts into the inner cavity of the chassis, rotate screw 1 clockwise. Once the device is shortened, remove the device from the chassis. The operation is complete.
[0039] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.
Claims
1. A spiral expansion device for use in the straightening of aluminum alloy enclosures, characterized by: The screw (1) includes a solid section (11) and a threaded section (12). The solid section (11) is connected to a connecting rod (3) via a locking mechanism. The threaded section (12) is threadedly connected to a threaded tube (2). The other end of the threaded tube (2) and the other end of the connecting rod (3) are both fitted with a support mechanism for supporting the inner wall of the chassis.
2. A spiral expansion device for use in the straightening of aluminum alloy enclosures as defined in claim 1 wherein: The locking mechanism includes a connecting pin (4) and an internal hexagon screw (7). The connecting pin (4) is inserted into the connection between the solid section (11) and the connecting rod (3). The internal hexagon screw (7) is sleeved inside the connecting pin (4) and is threadedly connected to the solid section (11).
3. A spiral expansion device for use in the straightening of aluminum alloy enclosures as defined in claim 2 wherein: A limiting ring (41) is provided on the connecting pin (4), and a limiting step (31) is provided at one end of the connecting rod (3) near the solid section (11). The limiting ring (41) and the limiting step (31) cooperate with each other.
4. A spiral expansion device for use in the straightening of aluminum alloy enclosures as defined in claim 3 wherein: An elastic washer (71) is fitted on the internal hexagon screw (7), and the elastic washer (71) is located between the nut of the internal hexagon screw (7) and the limiting ring (41) of the connecting pin (4).
5. A spiral expander for use in the squaring of aluminum alloy enclosures as defined in claim 3 wherein: A flat washer (72) is also fitted on the internal hex screw (7), and the flat washer (72) is located between the nut of the internal hex screw (7) and the limiting ring (41) of the connecting pin (4).
6. A spiral expander for use in the squaring of aluminum alloy enclosures as defined in claim 2 wherein: The connecting rod (3) has a cavity (32) inside. The connecting pin (4) and the internal hexagon screw (7) are inserted into the connecting rod (3) from one end of the cavity (32) and then connected to the solid section (11).
7. A spiral expansion device for shaping aluminum alloy chassis according to claim 1, characterized in that: The support mechanism includes a fixed block (5) and a support block (6). The fixed block (5) is sleeved on the end of the connecting rod (3) or the threaded pipe (2), and the support block (6) is connected to the fixed block (5).
8. A spiral expansion device for use in the straightening of aluminum alloy enclosures as defined in claim 7 wherein: The fixing block (5) is provided with a support ring (51), which overlaps the end face of the connecting rod (3) or the threaded pipe (2).
9. A spiral expansion device for use in the straightening of aluminum alloy enclosures as defined in claim 7 wherein: The support block (6) and the fixing block (5) are connected by a number of stainless steel combination screws (61).
10. A spiral expansion device for use in the straightening of aluminum alloy enclosures as defined in claim 9, wherein: The support block (6) is provided with a limiting groove (62) at one end facing the fixing block (5), and one end of the fixing block (5) is fitted into the limiting groove (62).