CN221790654U - Device for one-step forming of the edge section of an electric control box - Google Patents

Abstract

The utility model relates to a device for one-step forming of a cut shape of an edge of an electric cabinet body, and belongs to the technical field of sheet metal part processing equipment. An upper die assembly and a lower die assembly are respectively arranged on the upper side and the lower side of a workpiece blank, a hollow cavity is arranged in the upper die assembly, and a spring assembly is arranged in the hollow cavity; the profile surface structures of the upper die bending surface of the bottom surface of the upper die assembly and the lower die bending surface of the top surface of the lower die assembly are matched with the edge cut shape of the workpiece blank; the spring assembly has the structure that: the compression spring is installed in a blind hole at the top of the hollow cavity through a positioning guide pad at the top, the bottom of the compression spring is connected with a compression pin, the compression pin penetrates through the bottom surface of the upper die assembly and extends downwards, and the center position of the compression pin is opposite to a second lower forming edge of the lower die assembly. The utility model can shape the edge of the electric control box body at one time, reduces operation steps in the working process, greatly saves labor force and has low requirement on operators.

Description

Device for one-step forming of the edge section of an electric control box

Technical Field

The utility model relates to the technical field of sheet metal processing equipment, in particular to a device for one-step forming of the edge section of an electric control box.

Background Art

Sheet metal processing is a labor-intensive industry, and the processing of electronic control cabinets is a sub-field of the sheet metal industry. Bending is the basic technology for sheet metal three-dimensional forming. Although CNC bending is becoming more and more popular, it is still necessary for operators to perform on-site NC programming and rely on their own experience to compensate for bending, especially when the workpiece is bent forward and backward with multiple knives. Error compensation between processes is required. Therefore, bending is a production link with high technical content in sheet metal processing, and the labor cost is high. The structure of sheet metal workpieces such as cabinets varies greatly. For a type of workpiece with large batches, both forward and reverse bending, and fixed bending size and angle, CNC bending is used. Although the size and angle can be guaranteed, the efficiency is low.

In the process of processing the electric control box, if CNC bending is used, it means that in order to obtain the corresponding size and bending angle of the workpiece during the bending process, the positioning block position of the bending machine and the delayed pressing and lifting of the bending knife and other timing actions need to be repeatedly programmed in advance, and the workpiece must be repeatedly turned over manually on both sides during the process. This CNC bending processing method with high personnel and equipment configuration has high equipment and labor costs, and repeated monotonous machine operation and workpiece turning, high labor intensity and easy fatigue of operators, and low overall efficiency, which is unacceptable; Therefore, a very small number of large-scale sheet metal head manufacturers adopt: industrial robot + CNC bending machine programming linkage to solve the above dilemma. This method has a higher equipment set investment and maintenance cost, high technical threshold, and higher requirements on the quality of operators. This is obviously unreasonable and unacceptable.

Utility Model Content

In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a device for one-step forming of the edge section of an electric control box, thereby enabling the edge section of the electric control box to be formed in one step, shortening the work process, saving labor and not requiring high quality of operators.

The technical scheme adopted by the utility model is as follows: a device for one-time forming of the edge section of an electric control box body, an upper die assembly and a lower die assembly are respectively arranged on the upper and lower sides of a workpiece blank, a hollow cavity is arranged inside the upper die assembly, and a spring assembly is arranged in the hollow cavity; the contour surface structures of the upper die bending surface on the bottom surface of the upper die assembly and the lower die bending surface on the top surface of the lower die assembly are matched with the edge section of the workpiece blank; the structure of the spring assembly is as follows: it includes a compression spring, the top of the compression spring is installed in a blind hole on the top of the hollow cavity through a positioning guide pad, the bottom of the compression spring is connected to a clamping pin, the clamping pin passes through the bottom surface of the upper die assembly and extends downward, and the center position of the clamping pin is opposite to the second lower forming edge of the lower die assembly.

As a further improvement of the above technical solution:

Preferably, the structure of the upper die assembly is: it includes an upper die body, an upper die positioning and locking contour surface connected to the upper slider of the bending machine is arranged on the top of the upper die body, and the bottom structure of the upper die body forms an upper die bending surface.

Preferably, the bottom structure of the upper die body is: a guide surface, a die bottom surface, a forming round edge, a die inner side surface, an upper forming rebound release groove and an upper forming edge are arranged in sequence from left to right, and a clamping pin passes through the middle of the upper forming rebound release groove downward; the outer contour structure formed as a whole by the die inner side surface, the upper forming rebound release groove and the upper forming edge matches the edge section of the workpiece blank.

Preferably, the structure of the lower mold assembly is: it includes a lower mold body, a lower mold positioning and locking contour surface connected to the lower worktable of the bending machine is arranged at the bottom of the lower mold body, and the top structure of the lower mold body forms a lower mold bending surface.

Preferably, the top structure of the lower mold body is: a step surface, a workpiece positioning surface, an avoidance groove, a groove inner wall, a first lower forming edge, a second lower forming edge, a lower forming rebound release groove and a supporting surface are arranged in sequence from left to right; the outer contour structure formed as a whole by the groove inner wall, the first lower forming edge, the second lower forming edge and the lower forming rebound release groove matches the edge section of the workpiece blank.

Preferably, when the workpiece blank is processed, the left side wall of the workpiece blank abuts against the workpiece positioning surface.

Preferably, the position of the avoidance groove is opposite to the bottom surface of the mold in the upper mold assembly in the vertical direction; the vertex position of the second lower forming edge is opposite to the upper forming rebound release groove in the upper mold assembly in the vertical direction; the position of the lower forming rebound release groove is opposite to the upper forming edge in the upper mold assembly in the vertical direction.

Preferably, the height of the step surface is greater than the height of the apex of the second lower forming edge.

Preferably, the vertex height of the second lower forming edge is the same as the height of the supporting surface.

Preferably, a protrusion is provided on the first lower molding edge extending outwardly, and a step is formed between the protrusion and the inner wall of the groove in the horizontal direction.

The beneficial effects of the utility model are as follows:

The utility model has a compact and reasonable structure and is easy to operate. By arranging an upper die assembly and a lower die assembly that match each other, the upper die body is pressed down, and then the upper die bending surface and the lower die bending are used to bend the workpiece blank at one time to form the required multiple bending edges. The workpiece only needs to be positioned once and does not need to be turned over during the process. The edge cut shape can be obtained by only one forming, which better solves the technical problem of comprehensive consideration of equipment cost, labor cost and production efficiency for mass production of such structural products.

The utility model also has the following advantages:

(1) The utility model has a protrusion extending outwardly from the first lower forming edge, and a step difference is formed between the protrusion and the inner wall of the groove in the horizontal direction, which provides lateral springback compensation for the forming of the workpiece blank at this location;

(2) The utility model sets a workpiece positioning surface on the left side wall of the lower die assembly, so that the workpiece blank can be positioned here after being placed horizontally. After positioning, the bending operation can be carried out directly, which is convenient for operation;

(3) The upper die assembly of the utility model can provide pre-pressure to the workpiece blank before forming by arranging a spring assembly inside.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the structure of an existing electric control box.

FIG. 2 is a schematic diagram of the enlarged structure of the edge cutoff at point A in FIG. 1 .

FIG. 3 is a schematic diagram of the first bending process under the prior art.

FIG. 4 is a schematic diagram of the second bending process under the prior art.

FIG. 5 is a schematic diagram of the third bending process under the prior art.

FIG. 6 is a schematic diagram of the overall structure of the utility model (front view).

FIG. 7 is a side view of FIG. 6 .

Fig. 8 is a cross-sectional view taken along the line K-K in Fig. 6 .

FIG. 9 is an enlarged schematic diagram of the structure at point B in FIG. 8 .

FIG. 10 is a view showing a separated state of the side opening of the electric control box being truncately bent using the device of the utility model.

FIG. 11 is a view showing the fitting state of the side of the electric control box body being truncation-shaped bent using the device of the utility model.

FIG. 12 is a view showing a first bending state of the side opening of the electric control box body being bent into a truncation shape using the device of the utility model.

FIG. 13 is an enlarged schematic diagram of the structure at point C in FIG. 12 .

Among them: 1. Workpiece blank; 2. Upper die assembly; 3. Lower die assembly; 4. Spring assembly;

201, guide surface; 202, upper forming springback release groove; 203, upper die positioning and locking contour surface; 204, blind hole; 205, hollow cavity; 206, upper die bending surface; 207, upper forming edge; 208, forming round edge; 209, inner side of die; 210, bottom surface of die;

301, workpiece positioning surface; 302, first lower forming edge; 303, lower forming rebound release groove; 304, lower die positioning locking contour surface; 305, supporting surface; 306, lower die bending surface; 307, step surface; 308, second lower forming edge; 309, avoidance groove; 310, groove inner wall; 311, protrusion;

401, positioning guide pad; 402, compression spring; 403, clamping pin.

DETAILED DESCRIPTION

The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

As shown in Figures 6 to 13, the device for one-time forming of the edge section of an electric control box body of this embodiment has an upper mold assembly 2 and a lower mold assembly 3 respectively arranged on the upper and lower sides of the workpiece blank 1, a hollow cavity 205 is arranged inside the upper mold assembly 2, and a spring assembly 4 is arranged in the hollow cavity 205; the contour surface structures of the upper mold bending surface 206 on the bottom surface of the upper mold assembly 2 and the lower mold bending surface 306 on the top surface of the lower mold assembly 3 are matched with the edge section of the workpiece blank 1; the structure of the spring assembly 4 is: it includes a compression spring 402, the top of the compression spring 402 is installed in the blind hole 204 on the top of the hollow cavity 205 through a positioning guide pad 401, the bottom of the compression spring 402 is connected to a clamping pin 403, the clamping pin 403 passes through the bottom surface of the upper mold assembly 2 and extends downward, and the center position of the clamping pin 403 is opposite to the second lower forming edge 308 of the lower mold assembly 3.

In this embodiment, the structure of the upper die assembly 2 is as follows: it includes an upper die body, and an upper die positioning and locking contour surface 203 connected to the upper slider of the bending machine is arranged on the top of the upper die body, and the bottom structure of the upper die body forms an upper die bending surface 206. The bottom structure of the upper die body is as follows: from left to right, a guide surface 201, a die bottom surface 210, a forming round edge 208, a die inner side surface 209, an upper forming rebound release groove 202 and an upper forming edge 207 are arranged in sequence, and a clamping pin 403 passes through the middle of the upper forming rebound release groove 202 downward; the outer contour structure formed by the die inner side surface 209, the upper forming rebound release groove 202 and the upper forming edge 207 as a whole matches the edge section of the workpiece blank 1.

In this embodiment, the structure of the lower die assembly 3 is as follows: it includes a lower die body, a lower die positioning and locking contour surface 304 connected to the lower worktable of the bending machine is arranged at the bottom of the lower die body, and the top structure of the lower die body forms a lower die bending surface 306. The top structure of the lower die body is as follows: from left to right, a step surface 307, a workpiece positioning surface 301, an avoidance groove 309, a groove inner wall 310, a first lower forming edge 302, a second lower forming edge 308, a lower forming rebound release groove 303 and a supporting surface 305 are arranged in sequence; the outer contour structure formed by the groove inner wall 310, the first lower forming edge 302, the second lower forming edge 308 and the lower forming rebound release groove 303 as a whole matches the edge section of the workpiece blank 1;

In this embodiment, when the workpiece blank 1 is processed, the left side wall of the workpiece blank 1 abuts against the workpiece positioning surface 301 .

In this embodiment, the position of the avoidance groove 309 is opposite to the mold bottom surface 210 in the upper mold assembly 2 in the vertical direction; the vertex position of the second lower molding edge 308 is opposite to the upper molding rebound release groove 202 in the upper mold assembly 2 in the vertical direction; the position of the lower molding rebound release groove 303 is opposite to the upper molding edge 207 in the upper mold assembly 2 in the vertical direction.

In this embodiment, the height of the step surface 307 is greater than the height of the vertex of the second lower molding edge 308 .

In this embodiment, the vertex height of the second lower molding edge 308 is the same as the height of the supporting surface 305 .

In this embodiment, a protrusion 311 is extended outwardly from the first lower molding edge 302 , and a step is formed between the protrusion 311 and the groove inner wall 310 in the horizontal direction.

As shown in Figures 10 to 13, during the actual operation, the working method of the utility model is as follows:

The upper mold positioning and locking contour surface 203 preset in the upper mold assembly 2 is fixedly connected to the existing bending machine slider to install the upper mold assembly 2. The upper mold bending surface 206 matches the inner folding line of the truncated edge, and a step difference T3 is preset in the vertical direction between the mold bottom surface 210 of the upper mold assembly 2 and the bottom fixed point of the upper forming edge 207, so that the mold adjustment is easy;

The lower die positioning and locking contour surface 304 preset in the lower die assembly 3 is fixedly connected to the existing bending machine workbench, the lower die bending surface 306 matches the outer folding line of the truncated edge, and a step difference T2 is preset between the step surface 307 of the lower die assembly 3 and the supporting surface 305 in the vertical direction, so as to facilitate the positioning of the workpiece blank 1 before forming;

The upper die assembly 2 is driven to move up and down in the vertical direction by means of the existing bending machine slider;

At this time, the upper die bending surface 206 and the lower die bending surface 306 are separated by a workpiece material thickness T1, and the upper and lower parts are pressed together to form the workpiece blank 1 into a final forming state of a truncated edge shape.

In this embodiment, under the joint action of the upper forming rebound release groove 202 of the upper mold assembly 2, the lower forming rebound release groove 303 of the lower mold assembly 3, and the step difference T4 formed in the horizontal direction between the protrusion 311 and the inner wall 310 of the groove, a stable and controllable adaptive bending angle is formed, and finally the desired edge truncation is obtained.

The utility model has a reasonable structure and is easy to operate. The segmented upper die assembly 2 and the lower die assembly 3 are designed, so that the workpiece only needs to be positioned once and the edge cut shape of the workpiece blank 1 can be obtained by only one forming, which better solves the technical problem of mass production of such structural products; at the same time, by keeping the workpiece blank 1 stationary, the labor intensity of the operator turning the workpiece is reduced; by positioning once and forming three bends on the front and back sides, the production efficiency is greatly improved while the technical threshold of the bending link is lowered, so that ordinary bending equipment and general ordinary workers can also be competent for the bending process, and the double reduction of production cost is achieved: no expensive CNC or NC bending equipment is required, and an ordinary bending machine can be used, so the equipment cost is reduced; no programming and special experience are required, and general workers can take up the job after short-term training, so the requirements for operators are low, and the labor cost is greatly reduced.

The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims (10)

1. A device that is used for electric cabinet limit mouth section one shot forming, its characterized in that: an upper die assembly (2) and a lower die assembly (3) are respectively arranged on the upper side and the lower side of a workpiece blank (1), a hollow cavity (205) is arranged in the upper die assembly (2), and a spring assembly (4) is arranged in the hollow cavity (205);

The profile surface structures of an upper die bending surface (206) on the bottom surface of the upper die assembly (2) and a lower die bending surface (306) on the top surface of the lower die assembly (3) are matched with the edge cut shape of the workpiece blank (1);

The spring assembly (4) is of a structure that: the compression spring (402) is arranged in a blind hole (204) in the top of the hollow cavity (205) through a positioning guide pad (401), the bottom of the compression spring (402) is connected with a compression pin (403), the compression pin (403) penetrates through the bottom surface of the upper die assembly (2) and extends downwards, and the center position of the compression pin (403) is opposite to the second lower molding Ling Bian (308) of the lower die assembly (3).

2. The device for one-time forming of the edge cut of the electric cabinet body according to claim 1, wherein: the upper die assembly (2) has the structure that: the bending machine comprises an upper die body, wherein an upper die positioning and locking contour surface (203) connected with an upper sliding block of a bending machine is arranged at the top of the upper die body, and an upper die bending surface (206) is formed by the bottom structure of the upper die body.

3. The device for one-time forming of the edge cut of the electric cabinet body according to claim 2, wherein: the bottom structure of the upper die body is as follows: the guide surface (201), the die bottom surface (210), the forming round edge (208), the die inner side surface (209), the upper forming rebound release groove (202) and the upper forming Ling Bian (207) are sequentially arranged from left to right, and the pressing pin (403) penetrates downwards from the middle part of the upper forming rebound release groove (202);

The outer profile structure integrally formed by the inner side surface (209), the upper molding rebound release groove (202) and the upper molding Ling Bian (207) is matched with the edge cut shape of the workpiece blank (1).

4. The device for one-time forming of the edge cut of the electric cabinet body according to claim 1, wherein: the lower die assembly (3) has the structure that: the bending machine comprises a lower die body, wherein a lower die positioning and locking profile surface (304) connected with a lower workbench of the bending machine is arranged at the bottom of the lower die body, and a lower die bending surface (306) is formed by the top structure of the lower die body.

5. The device for one-time forming of the edge cutout of the electric cabinet body as claimed in claim 4, wherein: the top structure of the lower die body is as follows: a step surface (307), a workpiece positioning surface (301), an avoidance groove (309), a groove inner wall (310), a first lower molding Ling Bian (302), a second lower molding Ling Bian (308), a lower molding rebound release groove (303) and a bearing surface (305) are sequentially arranged from left to right;

The outer contour structures integrally formed by the inner wall (310), the first lower molding Ling Bian (302), the second lower molding Ling Bian (308) and the lower molding rebound release groove (303) are matched with the edge cut shape of the workpiece blank (1);

When the workpiece blank (1) is processed, the left side wall of the workpiece blank (1) is abutted against the workpiece positioning surface (301).

6. The device for one-time forming of the edge cutout of the electric cabinet body according to claim 5, wherein: the position of the avoidance groove (309) is opposite to the die bottom surface (210) in the upper die assembly (2) in the vertical direction;

The vertex position of the second lower molding Ling Bian (308) is opposite to the upper molding rebound release groove (202) in the upper die assembly (2) in the vertical direction;

The lower molding rebound release groove (303) is positioned opposite to the upper molding Ling Bian (207) in the upper die assembly (2) in the vertical direction.

7. The device for one-time forming of the edge cutout of the electric cabinet body according to claim 5, wherein: the height of the step surface (307) is greater than the height of the vertex of the second lower molding Ling Bian (308).

8. The device for one-time forming of the edge cutout of the electric cabinet body according to claim 7, wherein: the height of the top point of the second lower molding Ling Bian (308) is the same as the height of the supporting surface (305).

9. The device for one-time forming of the edge cutout of the electric cabinet body according to claim 5, wherein: a protrusion (311) is arranged on the first lower molding Ling Bian (302) in an outward extending manner.

10. The device for one-time forming of the edge cutout of the electric cabinet body according to claim 9, wherein: a step is formed between the protrusion (311) and the groove inner wall (310) in the horizontal direction.