CN115194018A

CN115194018A - Progressive die and punch press for production of protection box and processing method of protection box

Info

Publication number: CN115194018A
Application number: CN202210893509.8A
Authority: CN
Inventors: 蔡嘉成; 郑柳; 李普彬
Original assignee: Guangdong Mingtian Technology Co ltd
Current assignee: Guangdong Mingtian Technology Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-10-18
Anticipated expiration: 2042-07-27
Also published as: CN115194018B

Abstract

The invention provides a continuous die for the production of a protective box, a punch and a processing method for the protective box, belonging to the technical field of molds. Station, bending station, shaping station and rolling station. When the continuous mold is used for the production of the protective box, the feeding device feeds the sheet into the continuous mold, and makes the sheet pass through the pre-processing station, the bending station, the shaping station and the rounding station in sequence along the feeding direction. protective box. The continuous mold integrates all production links of the protective box, which can improve the production efficiency of the protective box, ensure the quality of the produced protective box, and improve the production efficiency of the enterprise.

Description

Progressive die and punch press for production of protection box and processing method of protection box

Technical Field

The invention relates to the technical field of dies, in particular to a progressive die and a punch for producing a protection box and a processing method of the protection box.

Background

Products and parts produced by the die have high production efficiency, can realize high-speed large-batch production, save raw materials and realize non-cutting processing; the product quality is stable, and the interchangeability is good; simple operation, no high technical requirements on operators and the like. Among them, the application of the punching progressive die is more and more widespread. The progressive die is a cold stamping die which adopts a strip-shaped stamping raw material in a stamping stroke of a press machine and simultaneously completes a plurality of stamping processes on a pair of dies by using a plurality of different stations, and the material strip moves once at a fixed distance every time the dies complete stamping until the product is completed.

In some special occasions, a protective box is arranged on the relay to reduce the damage of external interference to the relay. When the existing relay protection box is produced, a plate is usually bent and processed for multiple times by using equipment in a workshop to manufacture the relay protection box. The production mode has discontinuous processing links, so that the production efficiency is low; and because each link is cracked, the quality of the produced protection box can not be ensured, and the defective rate is higher.

Disclosure of Invention

In order to overcome the problems in the related art, one of the purposes of the invention is to provide a progressive die for producing a protection box, which integrates all production links of the protection box, can improve the production efficiency of the protection box, ensure the quality of the produced protection box and improve the production benefits of enterprises.

A progressive die for producing a protection box comprises an upper die base and a lower die base, wherein a front machining station, a bending station, a shaping station and a rounding station are arranged between the upper die base and the lower die base;

when the progressive die is used for producing the protection box, the plate is fed into the progressive die by the feeding device, and the plate sequentially passes through the pre-processing station, the bending station, the shaping station and the rolling station along the feeding direction, so that the protection box is obtained.

In a preferred technical scheme of the invention, a feed inlet and a discharge outlet are arranged between the upper die holder and the lower die holder, and the pre-processing station, the bending station, the shaping station and the rolling station are sequentially arranged between the feed inlet and the discharge outlet.

In a preferred technical scheme of the invention, the front processing station comprises a primary punching station, a secondary punching station and a tapping station which are sequentially arranged along the feeding direction;

when the plate is conveyed to the primary punching station, a first side edge hole is punched;

when the plate is conveyed to the secondary punching station, a second side hole is punched;

when the plate is conveyed to the tapping station, a connecting screw hole is machined by the tapping machine.

In a preferred technical scheme of the invention, the bending station comprises a placing position, a lifting plate and a bending block, wherein the placing position is used for placing a plate to be processed; the lifting plate is arranged below the placing position, the bending block is arranged on the lifting plate, and the lifting plate rises upwards to drive the bending block to rise to bend the plate.

In a preferred technical scheme of the invention, the lifting plate comprises a bottom plate, a moving plate and a lifting driving device, the bottom plate is fixed on the lower die base, the lifting driving device is fixed on the bottom plate, and the moving plate is arranged above the bottom plate and driven to lift by the lifting driving device.

In a preferred technical scheme of the invention, the bending blocks are arranged on the moving plate, the number of the bending blocks is 4, and the 4 bending blocks are arranged on the moving plate to form a rectangle; the plate is provided with 4 bending pieces, and the bending blocks are lifted to bend the bending pieces.

In a preferred technical scheme of the invention, the shaping station comprises a first shaping position and a second shaping position which are sequentially arranged along the conveying direction;

the protection box comprises a long edge and a short edge, and the first shaping position is used for folding up the long edge side plate of the protection box to form a left side wall and a right side wall of the protection box; and the second shaping position is used for folding the short side plates of the protection box to form the front side wall and the rear side wall of the protection box.

In a preferred technical scheme of the invention, the rolling station comprises a descending press block; and the left side wall, the right side wall, the front side wall and the rear side wall of the protection box are respectively provided with a curled edge, and when the protection box comes out of the second shaping position and is conveyed to the curling station, the downward pressing block presses the curled edges from top to bottom so that the curled edges form a curled circle on each side wall of the protection box.

The invention also provides a punch press, which comprises a main body, wherein the main body is provided with a feeding device, and the main body is provided with the progressive die for producing the protection box; a primary punching machine, a secondary punching machine, a tapping machine and a rolling lower press are sequentially arranged on the main body along the feeding direction of the feeding device;

the primary punching machine punches the plate at a primary punching station; the secondary punching machine performs secondary punching on the plate at a secondary punching station; the tapping machine performs tapping operation on the plate at a tapping station; and the edge rolling lower press presses the side wall of the protection box at the edge rolling station, so that the edge rolling of the side wall of the protection box forms an edge rolling.

The third object of the present invention is to provide a method for processing a protection box, which is implemented based on the above punch press, and comprises the following steps:

placing a plate on the feeding device, starting the feeding device, conveying the plate to a primary punching station, and punching the plate by the primary punching machine;

conveying the plate subjected to primary punching to a secondary punching station, and performing secondary punching on the plate by using the secondary punching machine;

conveying the plate subjected to secondary punching to a tapping station, and tapping the plate by using a tapping machine;

conveying the plate subjected to tapping to a bending part for bending operation;

conveying the bent plate to a first shaping position, and folding the plate to form side plates on the long sides in the first shaping position, so that the side plates on the long sides form the left side wall and the right side wall of the protection box;

conveying the plate processed in the first shaping position to a second shaping position, and folding the side plates of the short sides in the second shaping position to enable the side plates of the short sides to form the front side wall and the rear side wall of the protection box, so as to obtain a box body structure of the protection box;

and conveying the box body structure to a rolling station, and processing the box body structure at the rolling station, so that the rolled edge of the box body forms a rolling circle, and the processing of the protection box is completed.

The invention has the beneficial effects that:

the progressive die comprises an upper die holder and a lower die holder, and a front machining station, a bending station, a shaping station and a rounding station are arranged between the upper die holder and the lower die holder. The progressive die is arranged on a punching machine, and a feeding device is arranged on the punching machine. When the continuous die is used for producing the protection box, the plate is fed into the continuous die by the feeding device and sequentially passes through the pre-processing station, the bending station, the shaping station and the rolling station along the feeding direction. And (4) after the plate is processed at each processing station, the plate is sent out by the feeding device, and finally the protection box is obtained. The progressive die integrates all production links of the protection box, can improve the production efficiency of the protection box, can avoid the defect that all production links in the prior art are mutually split, ensures the quality of the produced protection box, and improves the production benefit of enterprises.

The invention also provides a production method of the protection box based on the progressive die and the punch press, and the protection box produced by the method has high production efficiency and high yield, and is beneficial to ensuring the production benefit of enterprises.

Drawings

FIG. 1 is a perspective view of a progressive die for producing a protective case according to the present invention;

FIG. 2 is a perspective view of a progressive die for producing a protective case, not including an upper die base, according to the present invention;

FIG. 3 is a perspective view of a bending station of a progressive die provided by the present invention;

FIG. 4 is a schematic side view of a bending station of a progressive die provided in accordance with the present invention;

FIG. 5 is a perspective view of a first reforming section of a progressive die provided by the present invention;

FIG. 6 is a perspective view of a protective case provided by the present invention;

FIG. 7 is a schematic view of a punch press according to the present invention;

fig. 8 is a flowchart of a method for processing a protection box according to the present invention.

Reference numerals:

2. a main body; 3. a protection box; 11. an upper die holder; 12. a lower die holder; 21. a primary punching machine; 22. a secondary punching machine; 23. tapping machines; 24. rolling and pressing machine; 25. a feeding device; 22. a lower die holder; 31. a left side wall; 32. a right side wall; 33. a front side wall; 34. a rear sidewall; 35. bending the sheet; 36. rolling; 100. a pre-processing station; 110. a primary punching station; 120. secondary punching station; 130. tapping station; 200. bending station; 210. a lifting plate; 220. placing bits; 230. bending the block; 300. a shaping station; 310. a first shaping position; 320. a second shaping position; 400. a rolling station; 2101. a base plate; 2102. moving the plate; 2103. a lift drive; 3101. and (7) bending and pressing the block.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that, although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

As shown in fig. 1 to 6, the progressive die for producing a protection box claimed by the present application comprises an upper die holder 11 and a lower die holder 12;

a front processing station 100, a bending station 200, a shaping station 300 and a rolling station 400 are arranged between the upper die holder 11 and the lower die holder 12;

when the progressive die is used for producing the protection box 3, the feeding device 25 feeds a plate into the progressive die, and the plate sequentially passes through the pre-processing station 100, the bending station 200, the shaping station 300 and the edge rolling station 400 along the feeding direction, so that the protection box 3 is obtained.

Specifically, a processing channel is arranged between the upper die holder 11 and the lower die holder 12, the processing channel is provided with a feeding hole and a discharging hole, and the front processing station 100, the bending station 200, the shaping station 300 and the edge rolling station 400 are sequentially arranged between the feeding hole and the discharging hole. When the plate passes through the pre-processing station 100, pre-processing the plate; when the plate passes through the bending station 200, bending the plate; the shaping process and the rolling process are performed on the plate material while the plate material passes through the shaping station 300 and the rolling station 400, respectively. It should be noted that the continuous die claimed in the present application is used in a punching machine or other processing equipment, and a processing apparatus is provided on the punching machine or other processing equipment to match with the punching machine or other processing equipment. For example, the punching machine is provided with a pre-processing device corresponding to the pre-processing station 100 of the progressive die, so that the sheet material can be pre-processed by the pre-processing device when passing through the pre-processing station 100.

The progressive die for producing the protection box comprises an upper die holder 11 and a lower die holder 12, wherein a front machining station 100, a bending station 200, a shaping station 300 and a rolling station 400 are arranged between the upper die holder 11 and the lower die holder 12. The progressive die is mounted on a punch press, which is provided with a feeding device 25. When the progressive die is used for producing the protection box 3, the feeding device 25 feeds the plate into the progressive die, and the plate sequentially passes through the pre-processing station 100, the bending station 200, the shaping station 300 and the rolling station 400 along the feeding direction. After the plate is processed at each processing station, the plate is sent out by the feeding device 25, and finally the protection box 3 is obtained. This modulus of continuity is in the same place each production link integration of protection box, can improve the production efficiency of protection box 3, can avoid each production link of prior art to cut the defect that splits each other moreover, guarantees the quality of the protection box 3 of producing, improves the productivity effect of enterprise.

In a specific embodiment, the pre-processing station 100 comprises a primary punching station 110, a secondary punching station 120 and a tapping station 130 which are arranged in sequence along the feeding direction;

when the plate is conveyed to the primary punching station 110, a first side hole is punched;

a second side hole is punched when the sheet is conveyed to the secondary punching station 120;

when the sheet is conveyed to the tapping station 130, a connecting screw hole is formed by the tapping machine 23.

More specifically, the progressive die is mounted on a punch press, which is provided with a primary punch 21 and a secondary punch 22 for performing punching operations, respectively. The punching machine is also provided with a tapping machine 23 for tapping operation. In the specific processing process of the protection box 3, the plate is a long-strip-shaped plate, and after primary punching and secondary punching, the plate can be bent, so that the plate can form a side wall.

Further, the bending station 200 comprises a placing position 220, a lifting plate 210 and a bending block 230, wherein the placing position 220 is used for placing a plate to be processed; the lifting plate 210 is arranged below the placing position 220, the bending block 230 is arranged on the lifting plate 210, and the lifting plate 210 rises upwards to drive the bending block 230 to rise to bend the plate.

More specifically, the lifting plate 210 includes a bottom plate 2101, a moving plate 2102 and a lifting driving device 2103, the bottom plate 2101 is fixed on the lower die holder 12, the lifting driving device 2103 is fixed on the bottom plate 2101, and the moving plate 2102 is disposed above the bottom plate 2101 and driven by the lifting driving device 2103 to lift.

The bottom plate 2101 is fixed on the lower die holder 12 by screws, the lifting driving device 2103 may be an air cylinder, and the air cylinder is started to drive the moving plate 2102 to move. Since the bending block 230 is fixed to the moving plate 2102 when the moving plate 2102 moves, the plate on the placing position 220 is stationary, and thus the moving plate 2102 and the plate may move relative to each other in a vertical direction. In practical applications, when the bending block 230 is disposed on the moving plate 2102 and cut out to protrude from the surface of the moving plate 2102, the bending block 230 moves upward to press the plate on the placing position 220, so that the plate is bent.

In a more specific embodiment, there are 4 bending blocks 230, and 4 bending blocks 230 are arranged in a rectangular shape on the moving plate 2102; the plate is provided with 4 bending pieces 35, and the bending block 230 is lifted to bend the bending pieces 35. After the plate is placed on the placing position 220, the position of the bending piece 35 corresponds to the position of the bending block 230, and the bending block 230 is located below the bending piece 35, so that when the bending block 230 moves upwards, the bending piece 35 is pressed, and the bending piece 35 is bent to form a required structure. It should be noted that a preset bending trace is provided between the bending piece 35 and the plate, and when the bending block 230 presses the bending piece 35 upwards, the bending piece 35 is bent along the bending trace.

Further, the shaping station 300 comprises a first shaping station 310 and a second shaping station 320 which are arranged in sequence along the conveying direction;

the protection box 3 comprises long sides and short sides, and the first shaping position 310 is used for folding up the long-side plates of the protection box 3 to form a left side wall 31 and a right side wall 32 of the protection box 3; the second shaping station 320 is used for folding the short side plates of the protection box 3 to form the front side wall 33 and the rear side wall 34 of the protection box 3.

The first shaping bits 310 and the second shaping bits 320 operate in a similar manner. The first shaping position 310 and the second shaping position 320 are both provided with stations for placing plates, it should be noted that the plates are fixed in the stations, and the fixing of the plates can be realized by means of components on the upper die holder 11. Bending pressing blocks 3101 capable of lifting are arranged on two sides of the first shaping position 310 and the second shaping position 320. When the plate material is located at the first shaping station 310, the bending pressing blocks 3101 located at both sides of the long side of the plate material are raised, so that the long side of the plate material is folded to form the left and

right side walls

31 and 32 of the protection box 3. Similarly, when the plate is located at the second shaping station 320, the bending pressing blocks 3101 located at both sides of the short side of the plate are lifted, so that the short side of the plate is folded to form the front side wall 33 and the rear side wall 34 of the protection box 3.

In a more specific embodiment, the rounding station 400 comprises a lower row of compacts; the left side wall 31 and the right side wall 32, the front side wall 33 and the rear side wall 34 of the protection box 3 are all provided with curled edges, and when the protection box 3 comes out from the second shaping position 320 and is conveyed to the curling station 400, the downward pressing block presses the curled edges from top to bottom, so that the curled edges form curls 36 on the side walls of the protection box 3. The curled edges on the side walls of the protection box 3 are located at the edges of the side walls, and after the protection box 3 is shaped by the second shaping position 320, the curled edges are located at the top of the side walls of the protection box 3 in the vertical direction. Thus, when the descending press block is pressed downward, the curled edge is bent to form a curled edge 36. The rolling circle 36 is beneficial to the connection of the protection box 3 and other parts, so that the protection box 3 and other parts do not need to be welded when being connected, and the cost is reduced.

As shown in fig. 7, the present invention further provides a punching machine, which includes a main body 2, wherein a feeding device 25 is disposed on the main body 2. The continuous die for producing the protection box is arranged on the main body 2; a primary punching machine 21, a secondary punching machine 22, a tapping machine 23 and a rolling lower press 24 are sequentially arranged on the main body 2 along the feeding direction of the feeding device 25, a downward pressing block is arranged on the rolling lower press 24, and the rolling lower press 24 drives the downward pressing block to move in the vertical direction so as to realize the edge curling processing of the plate;

the primary punching machine 21 performs primary punching on the plate at a primary punching station 110; the secondary punching machine 22 performs secondary punching on the plate at a secondary punching station 120; the tapping machine 23 performs tapping operation on the plate at a tapping station 130; the edge rolling presser 24 presses down on the side wall of the protective box 3 at the edge rolling station 400, so that the edge of the side wall of the protective box 3 forms the edge roll 36.

The punching machine is provided with a station for placing the progressive die, when the progressive die is placed on the station, the primary punching machine 21 corresponds to the primary punching station 110, the secondary punching machine 22 corresponds to the secondary punching station 120, the tapping machine 23 corresponds to the tapping station 130, and the rolling and pressing machine 24 corresponds to the rolling station 400. By matching the punch with the progressive die, continuous processing of all steps of the protection box 3 can be realized, and the production efficiency of the protection box 3 is improved.

As shown in fig. 8, the present invention further provides a method for processing a protection box, where the method for processing a protection box is implemented based on the punch press as described above, and the method for processing a protection box includes the following steps:

s100, placing a plate on the feeding device 25, starting the feeding device 25, conveying the plate to a primary punching station 110, and punching the plate by the primary punching machine 21;

s200, conveying the plate subjected to primary punching to a secondary punching station 120, and performing secondary punching on the plate by using the secondary punching machine 22;

s300, conveying the plate subjected to secondary punching to a tapping station 130, and tapping the plate by using the tapping machine 23; tapping is to tap a required screw hole on the plate.

S400, conveying the tapped plate to a bending part for bending operation; more specifically, the bending operation is to bend the bending piece 35 of the plate material along the bending trace.

S500, conveying the bent plate to a first shaping position 310, and folding the long-side plates in the first shaping position 310 to enable the long-side plates to form a left side wall 31 and a right side wall 32 of the protection box 3;

s600, conveying the plate processed in the first shaping position 310 to a second shaping position 320, and folding up the side plates of the short edges in the second shaping position 320 to enable the side plates of the short edges to form a front side wall 33 and a rear side wall 34 of the protection box 3, so as to obtain a box body structure of the protection box 3; the terms "front, rear, left, right" and "left" are used herein with reference to the feeding direction of the feeding device 25. More specifically, the left side wall 31 of the protection box 3 is close to the inlet, and the right side wall 32 after protection is close to the outlet.

S700, conveying the box structure to a rolling station 400, and processing the box structure at the rolling station 400, so that the rolled edge of the box forms a rolling circle 36, and the processing of the protection box 3 is completed.

The protection box 3 produced by the method has high production efficiency and high yield, and is beneficial to ensuring the production benefit of enterprises.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may also be positioned in other different ways and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, so that the scope of the present application is not to be construed as being limited. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a progressive die is used in production of protection box, includes upper die base and die holder, its characterized in that:

a front processing station, a bending station, a shaping station and a rolling station are arranged between the upper die holder and the lower die holder;

2. The progressive die for producing the protective cases according to claim 1, wherein:

a feed inlet and a discharge outlet are arranged between the upper die base and the lower die base, and the front machining station, the bending station, the shaping station and the edge rolling station are sequentially arranged between the feed inlet and the discharge outlet.

3. The progressive die for producing the protective cases according to claim 2, wherein:

the front machining station comprises a primary punching station, a secondary punching station and a tapping station which are sequentially arranged along the feeding direction;

and when the plate is conveyed to the tapping station, the tapping machine processes a connecting screw hole.

4. The progressive die for producing the protective cases according to claim 1, wherein:

the bending station comprises a placing position, a lifting plate and a bending block, and the placing position is used for placing a plate to be processed; the lifting plate is arranged below the placing position, the bending block is arranged on the lifting plate, and the lifting plate rises upwards to drive the bending block to rise to bend the plate.

5. The progressive die for producing the protective cases according to claim 4, wherein:

the lifting plate comprises a bottom plate, a movable plate and a lifting driving device, the bottom plate is fixed on the lower die base, the lifting driving device is fixed on the bottom plate, and the movable plate is arranged above the bottom plate and driven by the lifting driving device to lift.

6. The progressive die for producing a protective case according to claim 5, wherein:

the bending blocks are arranged on the moving plate, the number of the bending blocks is 4, and the 4 bending blocks are arranged on the moving plate to form a rectangle; the plate is provided with 4 bending pieces, and the bending blocks are lifted to bend the bending pieces.

7. The progressive die for producing protective cases according to any one of claims 1 to 6, wherein:

the shaping station comprises a first shaping position and a second shaping position which are sequentially arranged along the conveying direction;

the protection box comprises a long edge and a short edge, and the first shaping position is used for folding up the long edge side plate of the protection box to form a left side wall and a right side wall of the protection box; the second shaping position is used for folding the short side plates of the protection box to form the front side wall and the rear side wall of the protection box.

8. The progressive die for producing protective cases according to claim 7, wherein:

the rolling station comprises a descending press block;

and the left side wall, the right side wall, the front side wall and the rear side wall of the protection box are respectively provided with a curled edge, and when the protection box comes out of the second shaping position and is conveyed to the curling station, the downward pressing block presses the curled edges from top to bottom so that the curled edges form a curled circle on each side wall of the protection box.

9. The utility model provides a punch press, the punch press includes the main part, be equipped with material feeding unit in the main part, its characterized in that: the continuous die for producing the protective box is arranged on the main body, and the continuous die for producing the protective box is defined by claim 8; a primary punching machine, a secondary punching machine, a tapping machine and a rolling lower press are sequentially arranged on the main body along the feeding direction of the feeding device;

the primary punching machine punches the plate at a primary punching station for one time; the secondary punching machine performs secondary punching on the plate at a secondary punching station; the tapping machine performs tapping operation on the plate at a tapping station; and the rolling lower press presses the side wall of the protection box at a rolling station, so that the rolled edge of the side wall of the protection box forms a rolling circle.

10. A processing method of a protection box is characterized by comprising the following steps: the method for processing the protection box is realized based on the punch press as claimed in claim 9, and comprises the following steps:

conveying the bent plate to a first shaping position, and folding the side plates of the long sides of the plate in the first shaping position to form the left side wall and the right side wall of the protection box;

and conveying the box body structure to a rolling station, and processing the box body structure by a rolling lower press to enable the rolled edge of the box body to form a rolling circle and finish the processing of the protection box.