Sheet metal forming type electric control cabinet cover plate and processing method

Abstract

The application discloses a sheet metal forming type electric control cabinet cover plate and belongs to the technical field of electric control cabinet cover plates. The sheet metal forming type electric control cabinet cover plate comprises a metal plate body, a surrounding edge structure is arranged on the periphery edge of the metal plate body and is formed by being upwardly bent, a containing cavity is formed between the surrounding edge structure and the metal plate body, the containing cavity is used for covering the internal space of the electric control cabinet, a plurality of stamping holes are arranged on the metal plate body and are used for mounting electrical elements, and a push-pull entry port is arranged at the tail of the metal plate body. The application solves the problems of the existing electric control cabinet cover plate in structural design, i.e., a full-surrounding type surrounding edge with equal height is generally adopted, the electric control cabinet cover plate needs to be obliquely inserted or unlocked and buckled one by one during installation, the operation is complicated, the inner wall of the cabinet body and the surrounding components are prone to being scratched, the electric control cabinet cover plate is connected with the cabinet body only by means of screws, lacks rigid limiting and is prone to loosening under long-term vibration, the manufacturing process adopts a "split stamping + welding / riveting" mode, the process is complicated, the efficiency is low, the cost is high, and the product consistency and reliability are affected.

Description

Technical Field

[0001] This invention belongs to the technical field of electrical control cabinet cover plates, and particularly relates to a sheet metal forming electrical control cabinet cover plate and its processing method. Background Technology

[0002] The cover of the electrical control cabinet is a key protective component of the electrical control system. It mainly prevents personnel from directly contacting live parts through physical isolation, thereby reducing the risk of electric shock.

[0003] The existing electrical control cabinet cover structure generally adopts a full-enclosed edge with equal height in its structural design. This means that the cover needs to be inserted at an angle or unlocked and positioned one by one by multiple buckles during installation. The operation process is cumbersome and can easily cause scratches and damage to the inner wall of the cabinet or surrounding components.

[0004] Furthermore, existing electrical control cabinets often use simple right-angle bends for their edges, relying entirely on screws to connect to the cabinet. This lack of structural rigidity means that the connection strength depends entirely on the preload of the screws, making it prone to loosening under long-term vibration and resulting in insufficient connection stability.

[0005] In addition, the manufacturing process generally adopts the method of "splitting stamping + welding / riveting", which involves many processing steps and complex tooling fixtures. This not only results in low efficiency and high cost, but also leads to the accumulation of dimensional chain errors due to multiple clamping and welding deformations, reducing the consistency and reliability of the products. Summary of the Invention

[0006] The purpose of this invention is to address the following issues with existing electrical control cabinet covers: Firstly, their structural design typically employs a uniform height, fully enclosed perimeter, leading to cumbersome installation requiring tilting insertion or individual unlocking of latches, which can easily scratch the cabinet's inner wall and surrounding components. Secondly, the perimeter is often a right-angle bend, relying solely on screws for connection, lacking rigid restraint and prone to loosening under long-term vibration, resulting in poor connection stability. Thirdly, the manufacturing process uses a "split stamping + welding / riveting" method, which is complex, requires intricate tooling and fixtures, is inefficient and costly, and the cumulative dimensional errors caused by repeated clamping and welding deformation affect product consistency and reliability. Therefore, this invention proposes a sheet metal forming type electrical control cabinet cover.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a sheet metal forming type electrical control cabinet cover, comprising a metal plate, wherein the four edges of the metal plate are provided with an upwardly bent edge structure, the edge structure and the metal plate together form an accommodating cavity for covering the internal space of the electrical control cabinet, the metal plate is provided with a plurality of stamping holes for installing electrical components, and the tail of the metal plate is provided with a push-pull entry port.

[0008] Furthermore, the metal plate is provided with several punching openings.

[0009] Furthermore, the stamping holes are arranged in an array, and the edges of the holes are provided with a flanged structure or a chamfered structure.

[0010] Furthermore, the long side of the punched opening is parallel to the length direction of the metal plate.

[0011] Furthermore, the rear edge of the metal plate is lower than the front and side edges, forming a push-pull inlet for the cover plate's push-pull operation.

[0012] Furthermore, the top of the surrounding edge is provided with an inwardly folded flange, and several limiting slots are provided on the flanges on both sides of the metal plate.

[0013] Furthermore, the metal plate has several waist-shaped holes on its two sides.

[0014] Furthermore, the present invention also provides a method for processing a sheet metal forming type electrical control cabinet cover, comprising the following steps:

[0015] S1: Material selection and blanking; Select cold-rolled steel plates with a thickness of 1.0mm to 2.0mm, and blank them according to the design dimensions using laser or CNC punching, leaving a machining allowance of 0.5mm to 1.0mm;

[0016] S2: Pre-punching; punching all punching holes, cutouts, oblong holes and limiting slots on the flange on the surface of the metal sheet according to the design position, with the hole position accuracy controlled within ±0.2mm;

[0017] S3: Bending and forming; The bending line is bent in steps using a CNC bending machine. First, the long sides are bent, then the short sides are bent. The tail side is bent separately to a height lower than the other sides to form a push-pull entry.

[0018] S4: Flanging and punching of notches; Flanging is performed inward at the top of the edge, and several limiting notches are punched on the flanges on both sides of the metal plate. The notches are rectangular, trapezoidal or U-shaped.

[0019] S5: Strengthen structural treatment; use rounded transitions at the corners of the perimeter to improve local rigidity;

[0020] S6: Surface treatment; Deburring, powder coating or galvanizing the formed cover plate to improve corrosion resistance and appearance quality.

[0021] S7: Assembly verification; Perform a trial assembly of the cover plate and the electrical control cabinet frame to verify the operability of the push-pull entry, the matching accuracy of the positioning structure, the snap-fit ​​of the limit latch, and the alignment of the oblong hole.

[0022] This invention provides a sheet metal forming type electrical control cabinet cover. By lowering the height of the rear edge of the metal plate compared to the front and side edges, a push-pull entry port is formed at the rear of the metal plate. After the rear edge is lowered, the cover can be smoothly pushed in / pulled out along the axial direction of the electrical control cabinet. This is suitable for automated assembly lines or maintenance scenarios in confined spaces, avoiding installation interference or handling problems caused by traditional full-height edges. It enables quick push-pull installation / disassembly of the cover without the need for complex bolt disassembly or tool assistance, significantly reducing manual operation intensity and time costs. At the same time, a flange is provided at the top of the edge, and limiting slots are provided on the flanges on both sides of the metal plate. The limiting slots can restrict the displacement of the cover in the X / Y / Z directions, which is especially suitable for vehicle-mounted and industrial vibration environments. The limiting slot structure replaces some screw connections, reducing assembly steps and the number of parts, and reducing costs. The flange structure enhances the rigidity of the edge and prevents bending deformation. At the same time, the limiting slots achieve physical locking, improving the connection reliability between the cover and the cabinet.

[0023] The processing method of this invention achieves one-time forming of the cover plate through continuous die processing of punching → bending → flanging → forming of the notch / waist hole, reducing the time of process flow and tooling changeover. Moreover, features such as the limiting notch, waist hole, and push-pull entrance are completed in the same die or continuous process, avoiding the additional cost and precision loss of forming first and then secondary processing. The flanging and notch are formed simultaneously, ensuring the positional accuracy of both and improving the structural reliability.

[0024] Therefore, this embodiment has the following advantages compared to the prior art:

[0025] A sheet metal forming type electrical control cabinet cover solves the problems of existing electrical control cabinet covers, which generally adopt a uniform height full-enclosure edge design. This results in the need for tilting during installation or unlocking the buckles one by one, which is cumbersome and easily scratches the inner wall of the cabinet and surrounding parts. In terms of connection, the edge is mostly right-angled bend and is only fastened to the cabinet body with screws. It lacks rigid restraint and is prone to loosening under long-term vibration, resulting in poor connection stability. In terms of manufacturing process, the "split stamping + welding / riveting" method is used. The process is complicated and the tooling fixtures are complex. This is not only inefficient and costly, but also causes the accumulation of dimensional chain errors due to multiple clamping and welding deformations, affecting the consistency and reliability of the product. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1A three-dimensional sheet metal forming type electrical control cabinet cover Figure 1 .

[0028] Figure 2 A three-dimensional sheet metal forming type electrical control cabinet cover Figure 2 .

[0029] Figure 3 A three-dimensional sheet metal forming type electrical control cabinet cover Figure 3 .

[0030] Figure 4 This is a step diagram illustrating a sheet metal forming method for processing the cover plate of an electrical control cabinet.

[0031] Legend:

[0032] 1-Metal plate; 2-Accommodating cavity; 3-Stamping hole; 4-Push-pull inlet; 5-Cutting opening; 6-Flanged edge; 7-Limiting slot; 8-Oval hole; 9-Edge. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the 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 invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Example 1:

[0040] Please see Figure 1-3 The present invention provides a technical solution: a sheet metal forming type electrical control cabinet cover, including a metal plate 1, the four edges of the metal plate 1 are provided with an upwardly bent edge structure, the edge structure and the metal plate 1 form a receiving cavity 2 for covering the internal space of the electrical control cabinet, the metal plate 1 is provided with a plurality of stamping holes 3 for installing electrical components, and the tail of the metal plate 1 is provided with a push-pull inlet 4.

[0041] Specifically, see Figure 1-3 The metal plate 1 has several punched openings 5 ​​for mounting displays, windows, or electronic components.

[0042] Specifically, see Figure 1-3 The stamping holes 3 are arranged in an array, and the edges of the holes are provided with a flanged or chamfered structure. This is used to prevent stress concentration and improve assembly safety.

[0043] This invention provides a sheet metal forming type electrical control cabinet cover. By lowering the height of the rear edge of the metal plate compared to the front and side edges, a push-pull entry port is formed at the rear of the metal plate. After the rear edge is lowered, the cover can be smoothly pushed in / pulled out along the axial direction of the electrical control cabinet. This is suitable for automated assembly lines or maintenance scenarios in confined spaces, avoiding installation interference or handling problems caused by traditional full-height edges. It enables quick push-pull installation / disassembly of the cover without the need for complex bolt disassembly or tool assistance, significantly reducing manual operation intensity and time costs. At the same time, a flange is provided at the top of the edge, and limiting slots are provided on the flanges on both sides of the metal plate. The limiting slots can restrict the displacement of the cover in the X / Y / Z directions, which is especially suitable for vehicle-mounted and industrial vibration environments. The limiting slot structure replaces some screw connections, reducing assembly steps and the number of parts, and reducing costs. The flange structure enhances the rigidity of the edge and prevents bending deformation. At the same time, the limiting slots achieve physical locking, improving the connection reliability between the cover and the cabinet.

[0044] The processing method of this invention achieves one-time forming of the cover plate through continuous die processing of punching → bending → flanging → forming of the notch / waist hole, reducing the time of process flow and tooling changeover. Moreover, features such as the limiting notch, waist hole, and push-pull entrance are completed in the same die or continuous process, avoiding the additional cost and precision loss of forming first and then secondary processing. The flanging and notch are formed simultaneously, ensuring the positional accuracy of both and improving the structural reliability.

[0045] Therefore, this embodiment has the following advantages compared to the prior art:

[0046] A sheet metal forming type electrical control cabinet cover solves the problems of existing electrical control cabinet covers, which generally adopt a uniform height full-enclosure edge design. This results in the need for tilting during installation or unlocking the buckles one by one, which is cumbersome and easily scratches the inner wall of the cabinet and surrounding parts. In terms of connection, the edge is mostly right-angled bend and is only fastened to the cabinet body with screws. It lacks rigid restraint and is prone to loosening under long-term vibration, resulting in poor connection stability. In terms of manufacturing process, the "split stamping + welding / riveting" method is used. The process is complicated and the tooling fixtures are complex. This is not only inefficient and costly, but also causes the accumulation of dimensional chain errors due to multiple clamping and welding deformations, affecting the consistency and reliability of the product.

[0047] Example 2:

[0048] See Figure 1-3 The figure shows a sheet metal forming type electrical control cabinet cover provided by Embodiment 2 of the present invention. Based on the above embodiments, the following technical solutions are further improved: the long side direction of the punching opening 5 is parallel to the length direction of the metal plate 1.

[0049] Example 3:

[0050] See Figure 1-3 The figure shows a sheet metal forming type electrical control cabinet cover provided in Embodiment 3 of the present invention. Based on the above embodiments, the following technical solutions are further improved: the height of the rear edge of the metal plate 1 is lower than the height of the front and side edges, forming a push-pull inlet 4 for the push-pull operation of the cover.

[0051] Example 4:

[0052] See Figure 1-3 The figure shows a sheet metal forming type electrical control cabinet cover provided in Embodiment 4 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: The top of the surrounding edge is provided with an inwardly folded flange 6, and several limiting slots 7 are provided on the flanges 6 on both sides of the metal plate 1. These are used for snap-fitting and fixing with the electrical control cabinet frame.

[0053] Example 5:

[0054] See Figure 1-3 The figure shows a sheet metal forming type electrical control cabinet cover provided in Embodiment 5 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: Several oblong holes 8 are provided on the sides of the metal plate 1. These holes are used to pass through fixing screws or wire harnesses, thereby enhancing the flexibility of lateral connections and cable management.

[0055] Example 6:

[0056] See Figure 4 The figure shows a processing method for a sheet metal forming type electrical control cabinet cover provided in Embodiment Six of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution, including the following steps:

[0057] S1: Material selection and blanking; Select cold-rolled steel plates with a thickness of 1.0mm to 2.0mm, and blank them according to the design dimensions using laser or CNC punching, leaving a machining allowance of 0.5mm to 1.0mm;

[0058] S2: Pre-punching; Punch all the punching holes 3, punching openings 5, waist-shaped holes 8 and limiting slots 7 on the flange 6 on the surface of the metal plate 1 according to the design position, and control the hole position accuracy within ±0.2mm.

[0059] S3: Bending and forming; The bending line is bent in steps using a CNC bending machine. First, the long sides are bent, then the short sides are bent. The tail side is bent separately to a height lower than the other sides to form a push-pull entry 4.

[0060] S4: Flanging 6 and punching of notches; Flanging 6 is performed inward at the top of the edge, and several limiting notches 7 are punched on the flanges 6 on both sides of the metal plate 1. The limiting notches 7 are rectangular, trapezoidal or U-shaped.

[0061] S5: Strengthen structural treatment; use rounded transitions at the corners of the perimeter to improve local rigidity;

[0062] S6: Surface treatment; Deburring, powder coating or galvanizing the formed cover plate to improve corrosion resistance and appearance quality.

[0063] S7: Assembly verification; Perform a trial assembly of the cover plate and the electrical control cabinet frame to verify the operability of the push-pull entry port 4, the matching accuracy of the positioning structure, the snap-fit ​​firmness of the limit bayonet 7, and the alignment of the oblong hole 8.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sheet metal molded electrical control cabinet cover, characterized in that, The device includes a metal plate (1), and the metal plate (1) has an upwardly bent edge structure around its four edges. The edge structure and the metal plate (1) form a cavity (2) to cover the internal space of the electrical control cabinet. The metal plate (1) has several stamped holes (3) for installing electrical components. The metal plate (1) has a push-pull inlet (4) at its tail.

2. The sheet metal forming type electrical control cabinet cover according to claim 1, characterized in that, The metal plate (1) is provided with a number of punching holes (5).

3. The sheet metal forming type electrical control cabinet cover according to claim 1, characterized in that, The stamping holes (3) are arranged in an array, and the edges of the holes are provided with a flanged structure or a chamfered structure.

4. The sheet metal forming type electrical control cabinet cover according to claim 2, characterized in that, The long side of the punched opening (5) is parallel to the length direction of the metal plate (1).

5. A sheet metal forming type electrical control cabinet cover according to claim 4, characterized in that, The rear edge (9) of the metal plate (1) is lower than the height of its front and side edges (9), forming a push-pull inlet (4) for the push-pull operation of the cover plate.

6. The sheet metal forming type electrical control cabinet cover according to claim 3, characterized in that, The top of the edging (9) is provided with an inwardly folded flange (6), and several limiting slots (7) are provided on the flanges (6) on both sides of the metal plate (1).

7. A sheet metal forming type electrical control cabinet cover according to claim 4, characterized in that, The metal plate (1) has several waist-shaped holes (8) on its two sides of the surrounding edge (9).

8. A method for processing a sheet metal forming type electrical control cabinet cover as described in claims 1-7, characterized in that, Includes the following steps: S1: Material selection and blanking; Select cold-rolled steel plates with a thickness of 1.0mm to 2.0mm, and blank them according to the design dimensions using laser or CNC punching, leaving a machining allowance of 0.5mm to 1.0mm; S2: Pre-punching; punch all the punching holes (3), punching openings (5), waist-shaped holes (8) and limiting slots (7) on the flange (6) on the surface of the metal plate (1) according to the design position, and control the hole position accuracy within ±0.2mm; S3: Bending and forming; using a CNC bending machine to bend the bending line in steps, first bending the long side edges (9) on both sides, then bending the short side edges (9) at both ends, with the tail edge (9) bent separately to a height lower than the other edges (9) to form a push-pull entry (4). S4: Flanging (6) and punching of notches; Flanging (6) is performed inward at the top of the edge, and several limiting notches (7) are punched on the flanges (6) on both sides of the metal plate (1). The limiting notches (7) are rectangular, trapezoidal or U-shaped. S5: Strengthen structural treatment; make rounded transitions at the corners of the perimeter (9) to improve local rigidity; S6: Surface treatment; Deburring, powder coating or galvanizing the formed cover plate to improve corrosion resistance and appearance quality. S7: Assembly verification; The cover plate and the electrical control cabinet frame are assembled to verify the operability of the push-pull inlet (4), the matching accuracy of the positioning structure, the snap-fit ​​of the limit bayonet (7), and the alignment of the waist-shaped hole (8).

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