Sheet metal shearing equipment, shearing method for fire-fighting box production and fire-fighting box

Abstract

The invention relates to the technical field of metal plate shearing, and discloses metal plate shearing equipment, a shearing method for fire-fighting box production and a fire-fighting box. According to the metal plate shearing device, a metal plate can be gradually sheared in the direction that the distance between the bottom end of each shearing blade and the bottom end of the movable rack is sequentially reduced through each shearing blade at the indentation position generated on the surface of the metal plate, so that the stability of the shearing direction can be ensured; the problem of edge curling of the sheared plate can be avoided by gradually shearing in the linear direction, and then the next shearing position of the metal plate is replaced until the tiled appearance of the metal plate is sheared; and then the positions to be bent in the metal plate sequentially correspond to the positions under the shearing blades, the metal plate is pressed to form indentations so as to machine the bent positions, the shearing and bending processes are conducted through the same equipment, and the problem that additional positioning is needed due to the fact that a bending machine needs to be used is solved.

Description

Technical Field

[0001] This invention relates to the field of metal sheet shearing technology, specifically to a metal sheet shearing device, a shearing method for producing fire extinguisher boxes, and a fire extinguisher box. Background Technology

[0002] Metal sheet shearing equipment is a type of mechanical equipment used for cutting metal sheets, primarily for metal sheet processing in industrial production. This type of equipment typically includes shearing machines, punching machines, and bending machines, which can be customized and configured to meet different production needs.

[0003] Fire extinguisher boxes are devices used to store fire-fighting equipment and are widely used in buildings to ensure that fire-fighting equipment can be quickly accessed for firefighting in the event of a fire. In the production of fire extinguisher boxes, the selection and use of shearing equipment is crucial to product quality and production efficiency. The shearing methods in fire extinguisher box production mainly refer to the methods used to cut metal sheets during the production process.

[0004] The shearing accuracy of sheet metal shearing equipment directly affects the dimensional accuracy of fire extinguisher boxes. Insufficient shearing accuracy may lead to excessive dimensional deviations in the fire extinguisher boxes, affecting their normal use. Sheet metal shearing equipment requires regular maintenance and upkeep to ensure its proper operation. Improper maintenance, especially insufficient shearing offset compensation, may cause equipment malfunctions, affecting production efficiency and product quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a metal sheet shearing device, a shearing method for producing fire extinguisher boxes, and a fire extinguisher box itself.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A metal sheet shearing device includes a shearing support and a mounting frame, characterized in that: a lower shearing platform is provided at the top of the shearing support; a shearing drive mechanism is provided inside the mounting frame; a movable frame is provided at the movable end of the shearing drive mechanism; an upper shearing mechanism is provided on one side of the bottom of the movable frame; a pressing and positioning frame is provided on the other side of the bottom of the movable frame; and an upper pressing mechanism is provided on the side of the pressing and positioning frame near the upper shearing mechanism. The upper shearing mechanism includes a shearing mounting plate and a plurality of shearing blades, each shearing blade being fixed sequentially on the side of the shearing mounting plate away from the pressing and positioning frame; along the arrangement direction of each shearing blade, the distance between the bottom end of each shearing blade and the bottom end of the movable frame decreases sequentially. The upper pressing mechanism includes a pressing mounting plate and a plurality of pressing blades, each pressing blade being fixed on the side of the pressing mounting plate away from the pressing and positioning frame; and the bottom ends of each pressing blade are flush.

[0008] Driven by the shearing drive mechanism, the moving frame has a approach stroke, a pressing stroke, a pressing return stroke, and a shearing stroke during its downward movement. During the approach stroke, the pressing positioning frame, each of the shearing blades, and each of the pressing blades synchronously move towards one side of the lower shearing platform. During the pressing stroke, the pressing positioning frame presses the metal sheet to be sheared onto the upper surface of the lower shearing platform, and each of the pressing blades moves directly below the shearing blade, jointly pressing an indentation on the surface of the metal sheet. During the pressing return stroke, each of the pressing blades moves to the side of the shearing blade closest to the pressing positioning frame. During the shearing stroke, each of the shearing blades jointly completes the shearing of the indentation on the metal sheet.

[0009] Preferably, the mounting frame includes a side frame and a front guard plate. The side frame is provided with a plurality of side rollers on the side near the movable frame, and the front guard plate is provided with a plurality of front rollers on the side near the movable frame. Each side roller and each front roller can rotate freely. During the up-and-down movement of the movable frame, each side roller and each front roller remains in contact with the movable frame, restricting the lateral movement of the movable frame.

[0010] Preferably, the shearing drive mechanism includes a plurality of shearing drive cylinders, and a plurality of driven wedges are provided at the top of the mobile frame. The movable end of each shearing drive cylinder is fixed to each of the driven wedges. The movable ends of each shearing drive cylinder synchronously extend and retract, driving the entire mobile frame to move through the corresponding driven wedges.

[0011] Preferably, the pressing and positioning frame includes an extension bracket and a sliding pressing frame. A sliding drive screw is provided at the bottom end of the extension bracket, and a driven slider is provided on one side of the sliding pressing frame. The sliding drive screw and the driven slider are threadedly connected. A sliding drive motor is provided on one side of the sliding drive screw. The output shaft of the sliding drive motor is coaxially fixed with the sliding drive screw. The sliding drive motor can drive the sliding pressing frame to slide at the bottom of the extension bracket by driving the sliding drive screw to rotate.

[0012] Preferably, the upper pressing mechanism further includes several pressing cylinders, each of which is fixed to the side of the pressing positioning frame near the pressing positioning frame. Each pressing cylinder has a pressing drive slider at its movable end, and the top of the pressing mounting plate has several pressing drive wedges. Each pressing drive wedge has a pressing drive groove at its top, and each pressing drive slider is embedded in its corresponding pressing drive groove, and each pressing drive slider can slide inside its corresponding pressing drive groove.

[0013] Preferably, the pressing positioning frame has a plurality of limiting rails on the side near the pressing mounting plate, and the pressing mounting plate has a plurality of limiting sliders on the side near the pressing positioning frame; each limiting slider is embedded in its corresponding limiting rail, and each limiting slider can slide within its corresponding limiting rail; each limiting rail includes a vertical section and an inclined section, and the inclined section of the limiting rail is inclined towards the side near the upper shearing mechanism; when the limiting slider slides downward within the vertical section of the limiting rail, the pressing positioning frame performs a approach stroke, and when the limiting slider slides downward within the vertical section of the limiting rail, the pressing positioning frame performs a pressing stroke.

[0014] Preferably, the lower shearing platform includes a fixed pressure-bearing surface and a sliding surface. The fixed pressure-bearing surface has a shearing groove on the side near the sliding surface. The sliding surface can slide towards the fixed pressure-bearing surface in an upward inclined direction to fill the gap of the shearing groove. During the sliding process, the height of the upper surface of the sliding surface is always lower than the height of the upper surface of the fixed pressure-bearing surface.

[0015] Preferably, a sliding drive cylinder is provided at the bottom of the sliding table, and the telescopic end of the sliding drive cylinder is fixed to the sliding table. The telescopic process of the sliding drive cylinder and the pressing cylinder are synchronized. During the process of the pressing cylinder driving the pressing mounting plate to slide downward along the limiting track through the pressing drive slider, the sliding telescopic cylinder can drive the sliding table to slide in an upward inclined direction towards the side of the fixed pressure bearing table.

[0016] A shearing method for producing fire extinguisher boxes, using the aforementioned metal sheet shearing equipment, includes the following steps:

[0017] The metal sheet to be sheared is placed on the upper surface of the lower shearing platform, with the positions to be sheared aligned directly below each shearing blade. Driven by the shearing drive mechanism, the moving frame sequentially performs the approach stroke, pressing stroke, pressing return stroke, and shearing stroke as it moves downward, shearing the metal sheet. The next shearing position of the metal sheet is changed until the flat shape of the fire box is completely sheared, forming the fire box sheet. Then, the positions to be bent in the fire box sheet are aligned directly below each shearing blade, and driven by the shearing drive mechanism, the moving frame sequentially performs the approach stroke, pressing stroke, and pressing return stroke as it moves downward, pressing indentations into the fire box sheet.

[0018] A fire box is manufactured by bending fire box sheet metal produced using the aforementioned fire box production shearing method.

[0019] Compared with the prior art, the present invention provides a metal sheet shearing device, a shearing method for producing fire extinguisher boxes, and a fire extinguisher box, which has the following beneficial effects:

[0020] 1. This type of metal sheet shearing equipment first uses a pressing and positioning frame to press and stably position the metal sheet to be sheared on the upper surface of the lower shearing platform. Then, at the indentation points on the surface of the metal sheet, the shearing blades gradually shear the metal sheet along the direction where the distance between the bottom of each shearing blade and the bottom of the moving frame decreases sequentially. This ensures the stability of the shearing direction and avoids the problem of curling edges in the sheared sheet by gradually shearing along a linear direction. Then, the metal sheet is moved to the next shearing position until the flat shape of the metal sheet is completed, forming the desired metal sheet. Then, the bending positions in the metal sheet are sequentially aligned directly below each shearing blade. Driven by the shearing drive mechanism, the moving frame sequentially performs the approach stroke, pressing stroke, and pressing return stroke during its downward movement, pressing indentations into the metal sheet to process the bending position. This allows the shearing and bending processes to be performed in the same equipment, improving the continuity of subsequent operations and avoiding the need for additional positioning due to the use of a bending machine, thereby improving the efficiency of metal sheet shearing and subsequent bending production.

[0021] 2. This type of metal sheet shearing equipment, through the setting of various side rollers and various front rollers, allows the moving ends of each shearing drive cylinder to extend and retract synchronously, driving the entire moving frame to move through corresponding driven wedges. At the same time, each side roller and each front roller maintains contact with the moving frame, thereby restricting the lateral movement of the moving frame and enabling the moving frame to maintain vertical movement. This drives the upper shearing mechanism, pressing and positioning frame, and upper pressing mechanism to move synchronously in the vertical direction. Then, under the action of the pressing and positioning frame, the sliding drive motor drives the sliding drive screw to rotate, driving the sliding pressing frame to slide at the bottom of the extension support. This allows the position of the sliding pressing frame at the bottom of the extension support to be adjusted, thus adapting to metal sheets of different lengths through the movement of the sliding pressing frame, and enabling stable pressing and positioning of various metal sheets.

[0022] 3. This type of metal sheet shearing equipment, driven by the extension of the movable ends of each pressing chamber, drives the pressing mounting plate and the limiting slider to move downward along the limiting track via the pressing drive slider. When the limiting slider passes through the inclined section of the limiting track, each pressing drive slider can slide inside the corresponding pressing drive groove. The pressing drive slider can continue to transmit downward movement to the mounting plate. When the limiting slider slides downward inside the vertical section of the limiting track, the pressing positioning frame performs a approach stroke, and when the limiting slider slides downward inside the vertical section of the limiting track, the pressing positioning frame performs a pressing stroke. This, in conjunction with the approach stroke and pressing stroke of each pressing blade, allows each pressing blade to jointly press an indentation on the surface of the metal sheet. Within the shearing stroke, each pressing blade retracts, thus not interfering with the shearing activity of each shearing blade. The indentation on the surface of the metal sheet is effectively sheared by each shearing blade gradually decreasing in distance from the bottom of each shearing blade to the bottom of the moving frame.

[0023] 4. This type of metal sheet shearing equipment synchronizes the extension and retraction of the sliding drive cylinder and the pressing cylinder. During the pressing cylinder's downward movement of the pressing mounting plate along the limit track via the pressing drive slider, the sliding extension cylinder drives the sliding table to slide upwards towards the fixed bearing table. Thus, within the pressing stroke, the sliding table slides upwards towards the fixed bearing table, filling the gap in the shearing groove. This creates a height difference between the sliding table and the fixed bearing table, allowing for the pressing of creases onto the metal sheet surface while preventing excessively deep creases from affecting the sheet's rigidity. During the pressing return stroke, the sliding table slides downwards away from the fixed bearing table, exposing the shearing groove and allowing each shearing blade to extend into the groove to complete the shearing of the metal sheet at the crease. Attached Figure Description

[0024] Figure 1 This is one of the three-dimensional structural schematic diagrams of a metal sheet shearing device according to the present invention;

[0025] Figure 2 This is a second three-dimensional structural schematic diagram of a metal sheet shearing device according to the present invention;

[0026] Figure 3 This is a three-dimensional structural diagram of the shearing support and lower shearing platform of a metal sheet shearing device according to the present invention;

[0027] Figure 4 This is one of the internal three-dimensional structural diagrams of a metal sheet shearing device according to the present invention;

[0028] Figure 5 This is a second schematic diagram of the internal three-dimensional structure of a metal sheet shearing device according to the present invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the pressing and positioning frame of a metal sheet shearing device according to the present invention;

[0030] Figure 7 This is a three-dimensional structural diagram of the pressing and positioning frame and the upper pressing mechanism of a metal sheet shearing device according to the present invention;

[0031] Figure 8 This is one of the partial structural schematic diagrams of the upper pressing mechanism of a metal sheet shearing device according to the present invention;

[0032] Figure 9 This is a second partial structural schematic diagram of the upper pressing mechanism of a metal sheet shearing device according to the present invention;

[0033] Figure 10 This is a three-dimensional structural diagram of a fire-fighting box according to the present invention;

[0034] Figure 11 This is an unfolded orthographic view of the fire box panel of a fire box according to the present invention.

[0035] In the picture:

[0036] 1. Shear support; 2. Mounting frame; 21. Side frame; 22. Front guard plate; 23. Side rollers; 24. Front rollers; 3. Lower shearing platform; 31. Fixed pressure bearing surface; 311. Shearing groove; 32. Sliding table; 33. Sliding drive cylinder; 4. Shearing drive mechanism; 41. Shearing drive cylinder; 5. Moving frame; 51. Driven wedge; 6. Upper shearing mechanism; 61. Shearing mounting plate; 62. Shearing blade; 7. Pressing positioning frame; 71. Extension bracket; 72. Sliding pressing frame; 73. Sliding drive screw; 74. Driven slider; 75. Sliding drive motor; 76. Limiting rail; 8. Upper pressing mechanism; 81. Pressing mounting plate; 82. Pressing blade; 83. Pressing cylinder; 831. Pressing drive slider; 84. Pressing drive wedge; 841. Pressing drive groove; 85. Limiting slider. Detailed Implementation

[0037] 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.

[0038] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a metal sheet shearing device, a shearing method for producing fire extinguisher boxes, and a fire extinguisher box.

[0039] Example 1:

[0040] A metal sheet shearing device includes a shearing support 1 and a mounting frame 2. The shearing support 1 has a lower shearing platform 3 at its top. The mounting frame 2 has a shearing drive mechanism 4 inside. A movable frame 5 is located at the movable end of the shearing drive mechanism 4. An upper shearing mechanism 6 is located on one side of the bottom of the movable frame 5, and a pressing and positioning frame 7 is located on the other side of the bottom of the movable frame 5. An upper pressing mechanism 8 is located on the side of the pressing and positioning frame 7 closest to the upper shearing mechanism 6. The upper shearing mechanism 6 includes a shearing mounting plate 61 and several shearing blades 62. Each shearing blade 62 is sequentially fixed to the side of the shearing mounting plate 61 away from the pressing and positioning frame 7. Along the arrangement direction of each shearing blade 62, the distance between the bottom end of each shearing blade 62 and the bottom end of the movable frame 5 decreases sequentially. The upper pressing mechanism 8 includes a pressing mounting plate 81 and several pressing blades 82. Each pressing blade 82 is fixed to the side of the pressing mounting plate 81 away from the pressing and positioning frame 7, and the bottom ends of each pressing blade 82 are flush.

[0041] Driven by the shearing drive mechanism 4, the moving frame 5 has a approach stroke, a pressing stroke, a pressing return stroke, and a shearing stroke during its downward movement. During the approach stroke, the pressing positioning frame 7, each shearing blade 62, and each pressing blade 82 simultaneously approach one side of the lower shearing platform 3. During the pressing stroke, the pressing positioning frame 7 presses the metal sheet to be sheared onto the upper surface of the lower shearing platform 3, and each pressing blade 82 moves directly below the shearing blade 62, and the pressing blades 82 together press an indentation on the surface of the metal sheet. During the pressing return stroke, each pressing blade 82 moves to the side of the shearing blade 62 that is close to the pressing positioning frame 7. During the shearing stroke, the shearing blades 62 together complete the shearing of the indentation on the metal sheet.

[0042] In use, prepare the metal sheet to be sheared, then place it on the upper surface of the lower shearing platform 3, aligning the position to be sheared directly below each shearing blade 62. Driven by the shearing drive mechanism 4, the moving frame 5 sequentially executes the approach stroke, pressing stroke, pressing return stroke, and shearing stroke as it moves downwards. During the approach stroke, the pressing positioning frame 7, each shearing blade 62, and each pressing blade 82 synchronously move towards one side of the lower shearing platform 3. During the pressing stroke, the pressing positioning frame 7 presses the metal sheet to be sheared onto the upper surface of the lower shearing platform 3, and each pressing blade 82 moves directly below the shearing blade 62, with each pressing blade 82 pressing against the metal sheet. Indentations are pressed into the surface of the material; during the pressing return stroke, each pressing blade 82 moves to the side of the shearing blade 62 close to the pressing positioning frame 7; during the shearing stroke, each shearing blade 62 together cuts the indentation of the metal sheet, so that the metal sheet to be cut can be pressed and stably positioned on the upper surface of the lower shearing platform 3 by the pressing of the pressing positioning frame 7, and then the metal sheet can be gradually cut at the indentation position on the surface of the metal sheet by each shearing blade 62 along the direction in which the distance between the bottom end of each shearing blade 62 and the bottom end of the moving frame 5 decreases sequentially, so as to ensure the stability of the shearing direction, and also to avoid the problem of curling edges of the cut sheet by gradually cutting along the linear direction;

[0043] Then, the next cutting position of the metal sheet is changed until the flat shape of the metal sheet is cut to form the required metal sheet. Then, the positions to be bent in the metal sheet are aligned directly below each cutting blade 62. Driven by the cutting drive mechanism 4, the moving frame 5 sequentially performs the approach stroke, pressing stroke, and pressing return stroke as it moves downward, pressing the metal sheet to create indentations to process the bending position. This allows the cutting and bending processes to be performed on the same equipment, improving the continuity of subsequent operations and avoiding the need for additional positioning due to the use of a bending machine, thereby improving the efficiency of metal sheet cutting and subsequent bending production.

[0044] Example 2:

[0045] The mounting frame 2 includes a side frame 21 and a front guard plate 22. The side frame 21 is provided with a number of side rollers 23 on the side near the moving frame 5, and the front guard plate 22 is provided with a number of front rollers 24 on the side near the moving frame 5. Each side roller 23 and each front roller 24 can rotate freely. During the up and down movement of the moving frame 5, each side roller 23 and each front roller 24 remains in contact with the moving frame 5, restricting the lateral movement of the moving frame 5.

[0046] The shearing drive mechanism 4 includes several shearing drive cylinders 41, and several driven wedges 51 are provided at the top of the mobile frame 5. The movable ends of each shearing drive cylinder 41 are fixed to each driven wedge 51 respectively. The movable ends of each shearing drive cylinder 41 extend and retract synchronously, driving the entire mobile frame 5 to move through the corresponding driven wedges 51.

[0047] The pressing and positioning frame 7 includes an extension bracket 71 and a sliding pressing frame 72. A sliding drive screw 73 is provided at the bottom of the extension bracket 71, and a driven slider 74 is provided on one side of the sliding pressing frame 72. The sliding drive screw 73 and the driven slider 74 are threadedly connected. A sliding drive motor 75 is provided on one side of the sliding drive screw 73. The output shaft of the sliding drive motor 75 is coaxially fixed with the sliding drive screw 73. The sliding drive motor 75 can drive the sliding pressing frame 72 to slide at the bottom of the extension bracket 71 by driving the sliding drive screw 73 to rotate.

[0048] In use, through the arrangement of the side rollers 23 and the front rollers 24, the moving ends of the shearing drive cylinders 41 synchronously extend and retract, driving the entire moving frame 5 to move via the corresponding driven wedges 51. Simultaneously, the side rollers 23 and the front rollers 24 rotate, maintaining contact with the moving frame 5, thus restricting the lateral movement of the moving frame 5. This allows the moving frame 5 to maintain vertical movement, driving the upper shearing mechanism 6, the pressing positioning frame 7, and the upper pressing mechanism 8 to move synchronously in the vertical direction, and then pressing... Under the action of the positioning frame 7, the sliding drive motor 75 drives the sliding drive screw 73 to rotate, driving the sliding pressing frame 72 to slide at the bottom of the extension bracket 71. This allows the position of the sliding pressing frame 72 at the bottom of the extension bracket 71 to be adjusted (adjusting the distance between the sliding pressing frame 72 and the upper shearing mechanism 6). Thus, the movement of the sliding pressing frame 72 (in actual use, the distance between the bottom end of the sliding pressing frame 72 and the lowest point between each shearing blade 62 of the upper shearing mechanism 6 can be adjusted) can adapt to metal sheets of different lengths, and can stably press and position various metal sheets.

[0049] Example 3:

[0050] The upper pressing mechanism 8 also includes several pressing cylinders 83. Each pressing cylinder 83 is fixed on the side of the pressing positioning frame 7 near the pressing positioning frame 7. Each pressing cylinder 83 has a pressing drive slider 831 at its movable end. The top of the pressing mounting plate 81 has several pressing drive wedges 84. Each pressing drive wedge 84 has a pressing drive groove 841 at its top. Each pressing drive slider 831 is embedded in the corresponding pressing drive groove 841, and each pressing drive slider 831 can slide inside the corresponding pressing drive groove 841.

[0051] The pressing positioning frame 7 has several limiting rails 76 on the side near the pressing mounting plate 81, and the pressing mounting plate 81 has several limiting sliders 85 on the side near the pressing positioning frame 7. Each limiting slider 85 is embedded in its corresponding limiting rail 76, and each limiting slider 85 can slide within its corresponding limiting rail 76. Each limiting rail 76 includes a vertical section and an inclined section, and the inclined section of the limiting rail 76 is inclined towards the side near the upper shearing mechanism 6. When the limiting slider 85 slides downward within the vertical section of the limiting rail 76, the pressing positioning frame 7 performs a approach stroke, and when the limiting slider 85 slides downward within the vertical section of the limiting rail 76, the pressing positioning frame 7 performs a pressing stroke.

[0052] In use, the pressing drive sliders 831 at the movable ends of each pressing cylinder 83 can slide within their respective pressing drive grooves 841, and the limiting sliders 85 can slide within their respective limiting tracks 76. Thus, driven by the extension of the movable ends of each pressing chamber 83, the pressing drive sliders 831 drive the pressing mounting plate 81 and the limiting sliders 85 to move downwards along the limiting tracks 76. When the limiting sliders 85 pass through the inclined sections of the limiting tracks 76, the pressing drive sliders 831 can slide within their respective pressing drive grooves 841, and the downward movement can continue to be transmitted to the mounting plate 81 via the pressing drive sliders 831. The limiting slider 85 slides downward within the vertical section of the limiting track 76, pressing the positioning frame 7 to perform a approach stroke. This, in conjunction with the approach and pressing strokes of each pressing blade 82, allows the pressing blades 82 to jointly press an indentation on the surface of the metal sheet. Within the shearing stroke, each pressing blade 82 retracts, thus not interfering with the shearing activity of each shearing blade 62. The indentation on the surface of the metal sheet is effectively sheared by the shearing blades 62 gradually decreasing in distance from the bottom of each shearing blade 62 to the bottom of the moving frame 5.

[0053] The lower shearing platform 3 includes a fixed pressure bearing surface 31 and a sliding surface 32. The fixed pressure bearing surface 31 is provided with a shearing groove 311 on the side near the sliding surface 32. The sliding surface 32 can slide towards the fixed pressure bearing surface 31 in an upward inclined direction to fill the gap of the shearing groove 311. During the sliding process of the sliding surface 32, the height of the upper surface of the sliding surface 32 is always lower than the height of the upper surface of the fixed pressure bearing surface 31.

[0054] A sliding drive cylinder 33 is provided at the bottom of the sliding table 32. The extension and retraction end of the sliding drive cylinder 33 is fixed to the sliding table 32. The extension and retraction process of the sliding drive cylinder 33 is synchronized with that of the pressing cylinder 83. During the process of the pressing cylinder 83 driving the pressing mounting plate 81 to slide downward along the limit track 76 through the pressing drive slider 831, the sliding extension and retraction cylinder 33 can drive the sliding table 32 to slide in an upward inclined direction towards the side of the fixed pressure table 31.

[0055] Therefore, during use, the sliding drive cylinder 33 and the pressing cylinder 83 extend and retract synchronously. As the pressing cylinder 83 drives the pressing mounting plate 81 to slide downward along the limit track 76 via the pressing drive slider 831, the sliding extension cylinder 33 can drive the sliding table 32 to slide upward towards the fixed bearing table 31. Thus, within the pressing stroke, the sliding table 32 can slide upward towards the fixed bearing table 31, filling the gap of the shearing groove 311, so that there is a certain height difference between the sliding table 32 and the fixed bearing table 31. This allows for the pressing of creases on the surface of the metal sheet while avoiding excessively deep creases that could affect the rigidity of the metal sheet. Within the pressing return stroke, the sliding table 32 can slide downward away from the fixed bearing table 31, exposing the shearing groove 311, allowing each shearing blade 62 to extend into the shearing groove 311 to cut the creases on the metal sheet.

[0056] Example 4:

[0057] A shearing method for producing fire extinguisher boxes, using a metal sheet shearing device as described in any one of Examples 1-3, includes the following steps:

[0058] Place the metal sheet to be cut on the upper surface of the lower shearing platform 3, and align the position to be cut directly below each shearing blade 62.

[0059] Driven by the shearing drive mechanism 4, the moving frame 5 sequentially performs the approach stroke, pressing stroke, pressing return stroke and shearing stroke during its downward movement to shear the metal sheet.

[0060] Change to the next cutting position of the metal sheet until the flat shape of the fire box is cut to form the fire box sheet;

[0061] Then, the positions to be bent in the fire box material are aligned directly below each shearing blade 62. Driven by the shearing drive mechanism 4, the moving frame 5 sequentially performs the approach stroke, pressing stroke, and pressing return stroke as it moves downward, pressing the fire box material to create indentations.

[0062] Example 5:

[0063] A fire box is manufactured by bending fire box sheet metal produced using the shearing method for fire box production described in Example 4.

[0064] In this embodiment, the fire box (please refer to the finished product of the bent fire box) is mentioned. Figure 10 Please refer to the unfolded orthographic view of the fire extinguisher box panels used. Figure 11 The figure shows the unfolded orthographic projection view of the side box and the front door (the rear box does not need to be bent). In the figure, the solid line is the shearing edge line (the edge line produced by shearing the metal sheet by sequentially executing the approach stroke, pressing stroke, pressing return stroke and shearing stroke), and the dashed line is the bending line (the bending line produced by pressing the fire box sheet by sequentially executing the approach stroke, pressing stroke and pressing return stroke).

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal sheet shearing device, comprising a shearing support and a mounting frame, characterized in that: The shear support is provided with a lower shearing platform at the top, the mounting frame is provided with a shearing drive mechanism, the movable end of the shearing drive mechanism is provided with a movable frame, the bottom of the movable frame is provided with an upper shearing mechanism on one side, the bottom of the movable frame is provided with a pressing positioning frame on the other side, and the pressing positioning frame is provided with an upper pressing mechanism on the side of the pressing positioning frame near the upper shearing mechanism. The upper shearing mechanism includes a shearing mounting plate and a plurality of shearing blades. Each shearing blade is fixed in sequence on the side of the shearing mounting plate away from the pressing and positioning frame. Along the arrangement direction of each shearing blade, the distance between the bottom end of each shearing blade and the bottom end of the moving frame decreases in sequence. The upper pressing mechanism includes a pressing mounting plate and several pressing blades. Each pressing blade is fixed to the side of the pressing mounting plate away from the pressing positioning frame, and the bottom ends of each pressing blade are flush. Driven by the shearing drive mechanism, the moving frame has a contact stroke, a pressing stroke, a pressing return stroke, and a shearing stroke during its downward movement. During the approach stroke, the pressing positioning frame, each of the shearing blades, and each of the pressing blades synchronously move toward one side of the lower shearing platform; During the pressing stroke, the pressing positioning frame presses the metal sheet to be sheared onto the upper surface of the lower shearing platform, and each of the pressing blades moves to directly below the shearing blade, and each of the pressing blades together presses an indentation on the surface of the metal sheet. During the pressing and recovery stroke, each of the pressing blades moves to the side of the shearing blade closest to the pressing positioning frame; During the shearing stroke, each of the shearing blades works together to cut the indentation on the metal sheet.

2. The metal sheet shearing device according to claim 1, characterized in that: The mounting frame includes a side frame and a front guard plate. The side frame is provided with a number of side rollers on the side near the movable frame, and the front guard plate is provided with a number of front rollers on the side near the movable frame. Each side roller and each front roller can rotate freely. During the up and down movement of the movable frame, each side roller and each front roller remains in contact with the movable frame, restricting the lateral movement of the movable frame.

3. The metal sheet shearing device according to claim 1, characterized in that: The shearing drive mechanism includes a plurality of shearing drive cylinders, and a plurality of driven wedges are provided at the top of the movable frame. The movable end of each shearing drive cylinder is fixed to each of the driven wedges respectively. The movable ends of each shearing drive cylinder extend and retract synchronously, driving the entire moving frame to move via the corresponding driven wedges.

4. The metal sheet shearing device according to claim 1, characterized in that: The pressing and positioning frame includes an extension bracket and a sliding pressing frame. A sliding drive screw is provided at the bottom end of the extension bracket. A driven slider is provided on one side of the sliding pressing frame. The sliding drive screw and the driven slider are threadedly connected. A sliding drive motor is provided on one side of the sliding drive screw. The output shaft of the sliding drive motor is coaxially fixed with the sliding drive screw. The sliding drive motor can drive the sliding pressing frame to slide at the bottom of the extension bracket by driving the sliding drive screw to rotate.

5. A metal sheet shearing device according to claim 1, characterized in that: The upper pressing mechanism also includes several pressing cylinders. Each pressing cylinder is fixed on the side of the pressing positioning frame close to the pressing positioning frame. Each pressing cylinder has a pressing drive slider at its movable end. The top of the pressing mounting plate has several pressing drive wedges. Each of the pressing drive wedges has a pressing drive groove at its top, and each of the pressing drive sliders is embedded in the corresponding pressing drive groove, and each of the pressing drive sliders can slide inside the corresponding pressing drive groove.

6. A metal sheet shearing device according to claim 5, characterized in that: The pressing positioning frame is provided with several limiting rails on the side near the pressing mounting plate, and the pressing mounting plate is provided with several limiting sliders on the side near the pressing positioning frame. Each of the limiting sliders is embedded inside the corresponding limiting track, and each of the limiting sliders can slide inside the corresponding limiting track. Each limiting track includes a vertical section and an inclined section, and the inclined section of the limiting track is inclined towards the side closer to the upper shearing mechanism. When the limiting slider slides downward inside the vertical section of the limiting track, the pressing positioning frame performs a proximity stroke; when the limiting slider slides downward inside the vertical section of the limiting track, the pressing positioning frame performs a pressing stroke.

7. A metal sheet shearing device according to claim 6, characterized in that: The lower shearing platform includes a fixed pressure-bearing platform and a sliding platform, and a shearing groove is provided on the side of the fixed pressure-bearing platform near the sliding platform. The sliding platform can slide towards the fixed pressure-bearing platform in an upward inclined direction to fill the gap of the shear groove; During the sliding process of the sliding platform, the height of the upper surface of the sliding platform is always lower than the height of the upper surface of the fixed pressure bearing platform.

8. A metal sheet shearing device according to claim 7, characterized in that: A sliding drive cylinder is provided at the bottom of the sliding table. The extension and retraction end of the sliding drive cylinder is fixed to the sliding table. The extension and retraction processes of the sliding drive cylinder and the pressing cylinder are synchronized. During the process of the pressing cylinder driving the pressing mounting plate to slide downward along the limiting track through the pressing drive slider, the sliding telescopic cylinder can drive the sliding table to slide in an upward inclined direction towards the side of the fixed pressure bearing table.

9. A shearing method for producing fire extinguisher boxes, characterized in that, Using a metal sheet shearing device as described in any one of claims 1-8, the process includes the following steps: Place the metal sheet to be cut on the upper surface of the lower shearing platform, and align the position to be cut directly below each shearing blade; Driven by the shearing drive mechanism, the moving frame sequentially performs the approach stroke, pressing stroke, pressing return stroke and shearing stroke during its downward movement to shear the metal sheet. Change to the next cutting position of the metal sheet until the flat shape of the fire box is cut to form the fire box sheet; Then, the positions to be bent in the fire box material are aligned directly below each shearing blade. Driven by the shearing drive mechanism, the moving frame sequentially performs the approach stroke, pressing stroke, and pressing return stroke as it moves downward, pressing the fire box material to create indentations.

10. A fire box, manufactured by bending fire box sheet produced using the shearing method for fire box production as described in claim 9.

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