A ridge forming device for sheet metal parts of electromagnetic shielding equipment

Abstract

The present invention belongs to the field of sheet metal process technology, and in particular to a ridge forming device for sheet metal parts of electromagnetic shielding equipment. In order to prevent the rebound phenomenon that may occur in the existing stamping-type ridge forming device after ridge forming, the following scheme is proposed, including a material table, the upper surface of the material table is in a rectangular structure, and a mounting hole is opened in the middle of one end of the material table, a mold mechanism is fixed in the mounting hole, a stamping machine frame is fixed on the upper surface of the material table near the rear side, and a stamping machine is arranged at the top of the stamping machine frame above the mold mechanism, and the bottom extension end of the stamping machine is detachably fixedly connected to a main pressing frame, and the main pressing frame is in an overall U-shaped structure with an opening upward. The present invention can intermittently knock on both sides of the ridge position after stamping to relieve stress, effectively prevent the influence of residual stress on the plate shape, and ensure the stability of the plate shape after ridge forming.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal processing, and in particular to a sheet metal ridging device for electromagnetic shielding equipment. Background Art

[0002] Sheet metal needs to be processed according to usage requirements. In some cases, the sheet metal needs to be ridged to form a strip groove on the top of the sheet metal. This can improve the bending resistance of the sheet metal. For example, in the production process of mobile board houses, the protective metal plate on the outer surface is usually ridged. However, the general ridge processing method is through stamping. However, the mechanical properties of the metal are reduced at the raised position of the stamped workpiece due to the tensile stress of the metal itself.

[0003] After searching the existing stamping ridging devices, it is found that in order to prevent the metal from rebounding due to the influence of residual stress after ridging, the overshoot process is often adopted, that is, the depth of the ridge is increased. After the stamping die is removed, the position of the metal ridge will produce a slight rebound, and the rebound range just falls on the target size; although this overshoot method can eliminate a certain residual stress, the metal that has been overshot will cause the metal to stretch longer in an instant, which will not only tear part of the metal grains, resulting in a decrease in the metal's strength and shaping properties, but may also cause scratches and tears. Therefore, we propose a new ridging mechanism to eliminate the residual stress after ridging stamping. Summary of the invention

[0004] The present invention proposes a ridge-forming device for sheet metal parts of an electromagnetic shielding device, comprising a loading platform, the upper surface of the loading platform is in a rectangular structure, and a mounting hole is opened in the middle of one end of the loading platform, a mold mechanism is fixed in the mounting hole, a punching machine frame is fixed on the upper surface of the loading platform near the rear side, and a punching machine is arranged on the top of the punching machine frame above the mold mechanism, and a main pressing frame is detachably and fixedly connected to the bottom extension end of the punching machine, the main pressing frame is in a U-shaped structure with an opening upward, and an inward-recessed conical hole compatible with the mold mechanism is opened at the bottom end of the main pressing frame, and mutually symmetrical mounting notches are reserved on the front and rear sides of the main pressing frame, and the structures in the two mounting notches are identical and symmetrical Distribution, a horizontally arranged rotating shaft is arranged at the bottom of the groove of the installation notch, and a plurality of radial spoke rods are fixed to one end of the rotating shaft, and the same arc-shaped impact rod is fixed to the end of the spoke rod on the same rotating shaft away from the rotating shaft, the center of the arc-shaped impact rod falls on the axial center line of the rotating shaft, a torsion spring is sleeved on the outer wall of the rotating shaft, and teeth are reserved on the outer arc side of the arc-shaped impact rod; and pressure block notches are opened on the front and rear sides of the main pressure frame near the bottom end, and reset springs are fixed to the top inner walls of the two pressure block notches, and the same stress relief pressure block is fixed to the bottom end of the reset spring on the same side, and the lower surface of the stress relief pressure block is flush with the lower surface of the main pressure frame after being subjected to pressure.

[0005] A further arrangement is that the mold mechanism includes a fixed support ring embedded in the mounting hole and forming an overall circular ring structure, and the circumferential inner wall of the fixed support ring is provided with an inclined gentle slope near the top, and the inclined gentle slope is provided with a plurality of vertical spring grooves, and the bottoms of the spring grooves are all fixed with compression springs, and the tops of the compression springs are fixed with ball support blocks, and the tops of the ball support blocks are provided with beveled surfaces parallel to the slope surfaces of the inclined gentle slope, and balls are embedded on the beveled surfaces; the circumferential inner wall of the fixed support ring is rotatably connected with a rotatable support column, and the overall structure of the rotatable support column is a T-shaped boss structure, and the tops of the rotatable support columns are clamped with ridge ridges.

[0006] A further arrangement is that a plurality of positioning notches are provided at the junction of the circumferential outer wall and the bottom end of the rotatable support column, the angle between two adjacent positioning notches is scaled, and a plurality of insertion holes are provided on the circumferential outer wall of the rotatable support column near the bottom end, in which a toggle rod is inserted; a positioning mechanism is fixed to the bottom end of the fixed support ring, and the positioning mechanism includes a sliding plug block adapted to the positioning notch; through the cooperation of the set sliding plug block and the positioning notch, when it is necessary to punch ridges of a specific angle, it is only necessary to rotate the fixed support ring to the required angle and then position it; the positioning mechanism includes a group of slide rails fixed to the bottom end of the fixed support ring, the extension line of the slide rails points to the center of the circle, and the sliding plug block is slidably connected in the slide rails, an extension arm plate is fixed to the end of the circumferential outer wall of the fixed support ring near the slide rail, an electric control positioning pin is fixed to the lower surface of the extension arm plate, and a buffer spring is fixed to the end of the extension shaft of the electric control positioning pin, and the other end of the buffer spring is fixed to the side of the sliding plug block.

[0007] A further configuration is that an anti-twist groove matched with the shape of the lower surface of the ridging ridge is opened in the middle of the top of the rotatable support column, and a through hole penetrating the upper and lower ends is opened at the bottom of the anti-twist groove, and a tensioning screw is fixed to the lower surface of the ridging ridge, and the bottom end of the tensioning screw is screwed through the through hole to connect with a top nut; by setting the ridging ridge with a tensioning screw, when the height of the plate needs to be changed, it is only necessary to pad the bottom of the anti-twist groove with a block, which is easy to operate and maintain and clean.

[0008] A further arrangement is that an adjusting nut is embedded in the upper surface of the loading platform near the bottom end of the stamping machine frame, and a self-locking screw is threaded in the adjusting nut, and a push block is rotatably connected to the side of the self-locking screw close to the mold mechanism, and a guide plate is fixed to the side of the push block away from the stamping machine frame; the surface of the guide plate is parallel to the loading direction of the loading platform, and the lower surface of the push block is slidably connected to the upper surface of the loading platform; through the set push block and guide plate, the raw material sheet can be assisted to move forward during loading to ensure that the position of each punching is consistent.

[0009] A further configuration is that a magnet is embedded on the surface of the guide plate, and a vertical scale line is provided on the side of the guide plate close to the mold mechanism; through such a configuration, it can be ensured that the raw material sheet moves forward close to the guide plate during the feeding process before stamping.

[0010] A further configuration is that a circular eaves is reserved at the circumferential edge of the rotatable support column, and a gap is left between the lower surface of the circular eaves and the upper surface of the loading platform when not punched, and this gap is smaller than the elastic recovery spacing of the compression spring; and the top pipe mouth of the fixed support ring is flush with the upper surface of the loading platform; through such a configuration, a certain gap can be left between the plate and the upper surface of the loading platform before punching, so as to facilitate the position adjustment of the plate.

[0011] A further configuration is that a slide groove extending horizontally to the left and right is reserved at the bottom of the groove of the main pressing frame, and a pressing edge mechanism is slidably connected in the slide groove, and the pressing edge mechanism includes a pressing roller frame, and two pressing rollers are arranged on the lower surface of the pressing roller frame, and the middle roller diameter of the pressing roller is smaller than the roller diameter at both ends, and two longitudinally extending rollers are arranged at the top of the pressing roller frame, and a vertical sliding frame capable of sliding up and down is arranged at the top of the supporting rollers, and guide strips compatible with the vertical sliding frame are reserved on the opposite sides of the main pressing frame; an adjustable and retractable central protruding rod is arranged at the bottom extension end of the punching machine, and the bottom end of the central protruding rod is fixed to the upper surface of the vertical sliding frame.

[0012] A further configuration is that an arch-shaped fixing frame is fixed on the side of the main pressing frame, and an electric push rod extending horizontally toward the position of the edge pressing mechanism is arranged in the middle of the arch-shaped fixing frame, and an extension rod of the electric push rod is fixed on the side of the pressing roller frame; through the arranged electric push rod, the edge pressing mechanism can be driven to move slowly to perform stress relief operations on the protruding edges.

[0013] A further arrangement is that a fixed plug is fixed to the top of the main pressure frame at the top of the installation notch, and bearing frames are fixed on the opposite sides of the two fixed plugs, and transmission shafts are rotatably connected in the bearing frames. Half gears and reduction motors are respectively fixed at both ends of the transmission shafts, and the half gears are meshed with teeth on the back of the arc-shaped impact rod on the side. A control panel is arranged on the surface of the stamping machine frame near the top, and the signal output end of the control panel is connected to the control end of each electrical appliance through a wire.

[0014] The beneficial effects in this embodiment are: 1. By setting the stress relief block protruding from the lower surface of the main pressing frame, the slats can be fixed in advance by a small pressure when the main pressing frame is pressed down to fix the raw material board. If the edge of the raw material board has not been aligned with the preset position, it can be fine-tuned in time; then, with the setting of two arc-shaped impact rods, the two sides of the ridge position after the punching can be intermittently knocked to relieve stress, effectively preventing the influence of residual stress on the board shape and ensuring the stability of the board shape after ridge formation.

[0015] 2. By setting a rotatable support column that is rotatably connected to the fixed support ring, not only can the bulge angle on the plate be changed, but also after the stamping is completed, the rotatable support column and the stamped plate will be lifted up one end distance with the action of the compression spring, which is convenient for grabbing the raw materials and continuously feeding them.

[0016] 3. By setting up a pressing mechanism that can slide left and right, the protruding edges can be pressed and chamfered after the stamping is completed, which can not only disperse the stress concentration, but also prevent the edges from being too protruding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a sheet metal ridging device for electromagnetic shielding equipment proposed by the present invention; Figure 2 A side view of a sheet metal ridging device for electromagnetic shielding equipment proposed by the present invention; Figure 3 This is a bottom-up stereoscopic structural schematic diagram of a metal plate ridging device for electromagnetic shielding equipment proposed by the present invention; Figure 4 A sheet metal ridging device for electromagnetic shielding equipment proposed by the present invention Figure 2 Schematic diagram of the cross-sectional structure along line AA; Figure 5 A schematic diagram of the assembly structure of a support column in a sheet metal ridging device for electromagnetic shielding equipment proposed by the present invention; Figure 6 A schematic diagram of the assembly structure of an edge pressing mechanism in a metal plate ridging device for electromagnetic shielding equipment proposed by the present invention; Figure 7 This is a schematic diagram of the assembly structure of a main pressing frame in a sheet metal ridging device for electromagnetic shielding equipment proposed by the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of a main pressing frame in a sheet metal ridging device of an electromagnetic shielding device proposed by the present invention.

[0018] In the figure: 1, loading platform; 2, control panel; 3, punching machine frame; 4, punching machine; 5, main pressing frame; 501, sunken tapered hole; 502, slide groove; 503, guide bar; 504, fixed plug; 505, installation notch; 506, pressing block notch; 6, electric push rod; 7, guide plate; 8, arched fixing frame; 9, ridge ridge; 901, tightening screw; 10, installation hole; 11, arc-shaped impact rod; 12, stress relief pressure block; 13, dial Moving rod; 14, half gear; 15, bearing frame; 16, reduction motor; 17, vertical sliding frame; 18, rotatable support column; 181, positioning notch; 182, anti-twist slot; 19, fixed support ring; 191, inclined gentle slope; 192, spring sink groove; 20, push block; 21, edge pressing mechanism; 211, pressure roller; 22, sliding block; 23, electric control positioning pin; 24, ball support block; 25, compression spring; 26, torsion spring; 27, reset spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In this embodiment Reference Figure 1-8A sheet metal ridging device for electromagnetic shielding equipment includes a loading platform 1, the upper surface of the loading platform 1 is a rectangular structure, and a mounting hole 10 is opened in the middle of one end of the loading platform 1, which is far away from the loading end, and a mold mechanism is fixed in the mounting hole 10. A punching machine frame 3 is fixed on the upper surface of the loading platform 1 near the rear side, and a punching machine 4 is arranged on the top of the punching machine frame 3 above the mold mechanism. The bottom extension end of the punching machine 4 is detachably fixedly connected to a main pressing frame 5, and the main pressing frame 5 is generally open upward. The main pressing frame 5 has a U-shaped structure, and the bottom end of the main pressing frame 5 is provided with an indented tapered hole 501 adapted to the mold mechanism, and the front and rear sides of the main pressing frame 5 are respectively reserved with mutually symmetrical mounting notches 505, and the structures in the two mounting notches 505 are identical and symmetrically distributed, and a horizontally arranged rotating shaft is arranged at the bottom of the groove of the mounting notch 505, and one end of the rotating shaft is fixed with a plurality of radial spoke rods, and the spoke rods on the same rotating shaft are fixed with the same arc-shaped impact rod 11 at the end away from the rotating shaft, and the arc-shaped The center of the impact rod 11 falls on the axis line of the rotating shaft, the outer wall of the rotating shaft is sleeved with a torsion spring 26, and the outer arc side of the arc-shaped impact rod 11 is reserved with teeth; and the front and rear sides of the main pressure frame 5 are both provided with pressure block notches 506 near the bottom end, and the top inner walls of the two pressure block notches 506 are fixed with reset springs 27, and the bottom end of the reset spring 27 on the same side is fixed with the same stress relief pressure block 12, and the lower surface of the stress relief pressure block 12 is flush with the lower surface of the main pressure frame 5 after being subjected to pressure: by setting the stress relief pressure block 12 protruding from the lower surface of the main pressure frame 5, when the main pressure frame 5 is pressed down to fix the raw material board, the slats can be fixed in advance by a small pressure, and if the edge of the raw material board has not been aligned with the preset position, it can be fine-tuned in time; then, with the setting of the two arc-shaped impact rods 11, the two sides of the ridge position after the punching can be intermittently knocked to relieve stress, effectively preventing the influence of residual stress on the plate shape, and ensuring the stability of the plate shape after ridge formation.

[0021] Reference Figure 1 and Figure 5The mold mechanism includes a fixed support ring 19 embedded in the mounting hole 10 and having an overall circular ring structure, and a circumferential inner wall of the fixed support ring 19 is provided with an inclined gentle slope 191 near the top, and a plurality of vertical spring sinking grooves 192 are provided on the inclined gentle slope 191, and a compression spring 25 is fixed to the bottom of the spring sinking groove 192, and a ball support block 24 is fixed to the top of the compression spring 25, and the top of the ball support block 24 is provided with an inclined surface parallel to the slope surface of the inclined gentle slope 191, and a ball is embedded on the inclined surface; The circumferential inner wall of the fixed support ring 19 is rotatably connected with a rotatable support column 18, which has an overall T-shaped boss structure, and the top of the rotatable support column 18 is clamped with a ridge-forming ridge 9; by providing a rotatable support column 18 rotatably connected to the fixed support ring 19, not only the ridge angle on the plate can be changed, but also after the stamping is completed, the rotatable support column 18 together with the stamped plate will be lifted up a distance along with the action of the compression spring 25, so as to facilitate the grabbing and continuous feeding of the raw materials.

[0022] In this embodiment, a plurality of positioning notches 181 are provided at the junction of the circumferential outer wall and the bottom end of the rotatable support column 18, the angle between two adjacent positioning notches 181 is scaled, and a plurality of insertion holes are provided on the circumferential outer wall of the rotatable support column 18 near the bottom end, in which a toggle rod 13 is inserted; a positioning mechanism is fixed to the bottom end of the fixed support ring 19, and the positioning mechanism includes a sliding plug block 22 adapted to the positioning notch 181; by cooperating with the sliding plug block 22 and the positioning notch 181, when it is necessary to punch a ridge of a specific angle, it is only necessary to rotate the fixed support ring 19 to the required angle and then position it; the positioning mechanism includes a fixed fixed support ring 19 A set of slide rails at the bottom, the extension lines of the slide rails point to the center of the circle, and the sliding block 22 is slidably connected in the slide rails, an extension arm plate is fixed to the end of the circumferential outer wall of the fixed support ring 19 near the end of the slide rail, an electric control positioning pin 23 is fixed to the lower surface of the extension arm plate, and a buffer spring is fixed to the end of the extension axis of the electric control positioning pin 23, and the other end of the buffer spring is fixed to the side of the sliding block 22; through the provision of the electric control positioning pin 23 and the sliding block 22, when the sliding block 22 is started to prepare for positioning, even if it is not instantly pressed against the positioning notch 181, a pre-tightening thrust can be generated until the positioning notch 181 is rotated to dock with the sliding block 22 to complete the locking.

[0023] In this embodiment, an anti-twist groove 182 that is compatible with the shape of the lower surface of the ridging ridge 9 is opened in the middle of the top of the rotatable support column 18, and a through hole that passes through the upper and lower ends is opened at the bottom end of the anti-twist groove 182, and a tensioning screw 901 is fixed to the lower surface of the ridging ridge 9, and the bottom end of the tensioning screw 901 is screwed through the through hole with a top nut; by setting the ridging ridge 9 with a tensioning screw 901, when the height of the plate protrusion needs to be changed, it is only necessary to pad the bottom of the anti-twist groove 182 with a block, which is easy to operate and easy to maintain and clean.

[0024] Reference Figure 1-2 An adjusting nut is embedded at the bottom end of the punching machine frame 3 near the upper surface of the loading platform 1, and a self-locking screw is threaded in the adjusting nut, and a push block 20 is rotatably connected to the side of the self-locking screw close to the mold mechanism, and a guide plate 7 is fixed to the side of the push block 20 away from the punching machine frame 3; the surface of the guide plate 7 is parallel to the loading direction of the loading platform 1, and the lower surface of the push block 20 is slidably connected to the upper surface of the loading platform 1; through the set push block 20 and the guide plate 7, the raw material sheet can be assisted to move forward during loading to ensure that the position of each punching is consistent.

[0025] In this embodiment, a magnet is embedded on the surface of the guide plate 7, and a vertical scale line is provided on the side of the guide plate 7 close to the mold mechanism; through such a setting, it can be ensured that the raw material sheet moves forward close to the guide plate 7 during the feeding process before stamping.

[0026] Reference Figure 2 and Figure 5 A circular eaves is reserved at the circumferential edge of the rotatable support column 18, and a gap is left between the lower surface of the circular eaves and the upper surface of the loading platform 1 when not punched, and this gap is smaller than the elastic recovery spacing of the compression spring 25; and the top pipe mouth of the fixed support ring 19 is flush with the upper surface of the loading platform 1; through such an arrangement, a certain gap can be left between the plate and the upper surface of the loading platform 1 before punching, which is convenient for adjusting the position of the plate.

[0027] Reference Figure 6-8 The bottom of the groove of the main pressing frame 5 is reserved with a slide groove 502 extending horizontally to the left and right, and a pressing mechanism 21 is slidably connected in the slide groove 502, the pressing mechanism 21 includes a pressing roller frame, the lower surface of the pressing roller frame is provided with two pressing rollers 211, and the middle roller diameter of the pressing roller 211 is smaller than the roller diameter at both ends, the top of the pressing roller frame is provided with two longitudinally extending rollers, and the top of the rollers is provided with a vertical sliding frame 17 that can slide up and down, and the two opposite sides of the main pressing frame 5 are reserved with guide strips 503 adapted to the vertical sliding frame 17; the bottom extension end of the punching machine 4 is provided with an adjustable and retractable central protruding rod, and the bottom end of the central protruding rod is fixed to the upper surface of the vertical sliding frame 17; by setting the pressing mechanism 21 that can slide left and right, the protruding edges can be pressed and chamfered after the stamping is completed, which can not only disperse the stress concentration but also prevent the edges from being too protruding.

[0028] In this embodiment, a bow-shaped fixing frame 8 is fixed to the side of the main pressing frame 5, and an electric push rod 6 extending horizontally toward the position of the edge pressing mechanism 21 is arranged in the middle of the bow-shaped fixing frame 8, and the extension rod of the electric push rod 6 is fixed to the side of the pressure roller frame; through the arranged electric push rod 6, the edge pressing mechanism 21 can be driven to move slowly to perform stress relief operation on the protruding edges.

[0029] In this embodiment, a fixed plug 504 is fixed at the top of the main pressure frame 5 located at the top of the installation notch 505, and a bearing frame 15 is fixed on the opposite side of the two fixed plugs 504. A transmission shaft is rotatably connected in the bearing frame 15, and a half gear 14 and a reduction motor 16 are respectively fixed at both ends of the transmission shaft. The half gear 14 is meshed with the teeth on the back of the arc-shaped impact rod 11 on the side where it is located. A control panel 2 is provided on the surface of the stamping machine frame 3 near the top, and the signal output end of the control panel 2 is connected to the control end of each electrical appliance through a wire; by setting the half gear 14 and the reduction motor 16 in conjunction with the setting of the torsion spring 26, the arc-shaped impact rod 11 can be driven to intermittently impact the top of the stress relief pressure block 12 to achieve the effect of stress relief and shaping.

[0030] Before using the device, the punching machine 4 is first controlled to drive the main pressing frame 5 to rise, and a sufficient distance is reserved between its bottom surface and the top of the ridge ridge 9. Then, the edge of the plate to be punched is slowly pushed toward the top of the ridge ridge 9 along the edge of the guide plate 7 until the ridge position of the plate reaches the top of the ridge ridge 9, and then the position of the guide plate 7 is adjusted to determine the longitudinal spacing; then the punching machine 4 is controlled to descend in a gradient, and the stress relief pressing block 12 protruding from the lower surface of the main pressing frame 5 is set to press the main pressing frame 5 down by the first gradient, that is, the raw material plate is fixed. When fixing, the slats can be fixed in advance by a small pressure. If the edge of the raw material board has not been aligned with the preset position, it can be fine-tuned in time; then continue to descend until the punching is formed. At this time, do not immediately lift the main pressing frame 5, start the two reduction motors 16, the half gear 14 and the reduction motor 16 cooperate with the setting of the torsion spring 26, that is, drive the arc-shaped impact rod 11 to intermittently impact the top of the stress relief pressure block 12, so as to achieve the effect of stress relief and shaping, effectively prevent the influence of residual stress on the board shape, and ensure the stability of the board shape after ridge forming.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ridge forming device for sheet metal parts of an electromagnetic shielding device, comprising a loading platform (1), the upper surface of the loading platform (1) being of a rectangular structure, and a mounting hole (10) being opened in the middle of one end of the loading platform (1), a mold mechanism being fixed in the mounting hole (10), a punching machine frame (3) being fixed near the rear side of the upper surface of the loading platform (1), and a punching machine (4) being arranged at the top of the punching machine frame (3) above the mold mechanism, a main pressing frame (5) being detachably fixedly connected to the bottom extension end of the punching machine (4), characterized in that: The main pressing frame (5) is in the form of a U-shaped structure with an opening upward, and a recessed conical hole (501) adapted to the mold mechanism is formed at the bottom of the main pressing frame (5), and symmetrical mounting notches (505) are reserved on the front and rear sides of the main pressing frame (5), and the structures in the two mounting notches (505) are identical and symmetrically distributed. A rotating shaft arranged horizontally is arranged at the bottom of the groove of the mounting notch (505), and a spoke rod is fixed at one end of the rotating shaft, and a same arc-shaped impact rod (11) is fixed at the end of the spoke rod on the same rotating shaft away from the rotating shaft, a torsion spring (26) is sleeved on the outer wall of the rotating shaft, and teeth are reserved on the outer arc side of the arc-shaped impact rod (11); The main pressure frame (5) has pressure block notches (506) on both the front and rear sides near the bottom, and the top inner walls of the two pressure block notches (506) are fixed with return springs (27). The bottom end of the return spring (27) on the same side is fixed with the same stress relief pressure block (12), and the lower surface of the stress relief pressure block (12) is flush with the lower surface of the main pressure frame (5) after being subjected to pressure.

2. The electromagnetic shielding equipment sheet metal ridging device according to claim 1, characterized in that: The mold mechanism comprises a fixed support ring (19) embedded in the mounting hole (10) and forming an overall circular ring structure, wherein the circumferential inner wall of the fixed support ring (19) is provided with an inclined gentle slope (191) near the top, the inclined gentle slope (191) is provided with a plurality of vertical spring recesses (192), the groove bottoms of the spring recesses (192) are all fixed with compression springs (25), the top of the compression spring (25) is fixed with a ball support block (24), and the top of the ball support block (24) is provided with an inclined surface parallel to the slope surface of the inclined gentle slope (191), and a ball is embedded on the inclined surface; the circumferential inner wall of the fixed support ring (19) is rotatably connected with a rotatable support column (18), the rotatable support column (18) is in the form of a T-shaped boss structure, and the top of the rotatable support column (18) is clamped with a ridge convex ridge (9).

3. The electromagnetic shielding equipment sheet metal ridging device according to claim 2, characterized in that: A plurality of positioning notches (181) are provided at the junction of the circumferential outer wall and the bottom end of the rotatable support column (18), the angle between two adjacent positioning notches (181) is graduated, and a plurality of insertion holes are provided on the circumferential outer wall of the rotatable support column (18) near the bottom end, a toggle rod (13) being inserted into one of the insertion holes; a positioning mechanism is fixed to the bottom end of the fixed support ring (19), the positioning mechanism comprising a sliding plug block (22) adapted to the positioning notch (181); The positioning mechanism comprises a group of slide rails fixed to the bottom end of the fixed support ring (19), the extension line of the slide rails points to the center of the circle, and the sliding block (22) is slidably connected in the slide rails, an extension arm plate is fixed to the end of the circumferential outer wall of the fixed support ring (19) close to the slide rail, an electric control positioning pin (23) is fixed to the lower surface of the extension arm plate, and a buffer spring is fixed to the end of the extension shaft of the electric control positioning pin (23), and the other end of the buffer spring is fixed to the side of the sliding block (22).

4. The electromagnetic shielding equipment sheet metal ridging device according to claim 3, characterized in that: The middle part of the top of the rotatable support column (18) is provided with an anti-twist slot (182) that matches the shape of the lower surface of the ridging ridge (9), and the bottom end of the anti-twist slot (182) is provided with a through hole that passes through the upper and lower ends, and a tensioning screw (901) is fixed to the lower surface of the ridging ridge (9), and the bottom end of the tensioning screw (901) passes through the through hole and is screwed with a top nut.

5. The electromagnetic shielding equipment sheet metal ridging device according to claim 1, characterized in that: An adjusting nut is embedded in the bottom end of the punching machine frame (3) near the upper surface of the loading platform (1), and a self-locking screw is threaded in the adjusting nut. The side of the self-locking screw near the mold mechanism is rotatably connected to a push block (20), and the side of the push block (20) away from the punching machine frame (3) is fixed with a guide plate (7); the surface of the guide plate (7) is parallel to the loading direction of the loading platform (1), and the lower surface of the push block (20) is slidably connected to the upper surface of the loading platform (1).

6. The electromagnetic shielding equipment sheet metal ridging device according to claim 5, characterized in that: A magnet is embedded on the surface of the material guide plate (7), and a vertical scale line is provided on a side of the material guide plate (7) close to the mold mechanism.

7. The electromagnetic shielding equipment sheet metal ridging device according to claim 4, characterized in that: A circular eave is reserved at the circumferential edge of the rotatable support column (18), and a gap is left between the lower surface of the circular eave and the upper surface of the loading platform (1) when not punched, and the gap is smaller than the elastic recovery spacing of the compression spring (25); and the top end of the fixed support ring (19) is flush with the upper surface of the loading platform (1).

8. The sheet metal ridging device for electromagnetic shielding equipment according to claim 1, characterized in that: The bottom of the main pressing frame (5) is reserved with a slide groove (502) extending horizontally to the left and right, and a pressing mechanism (21) is slidably connected in the slide groove (502), the pressing mechanism (21) comprising a pressing roller frame, the lower surface of the pressing roller frame is provided with two pressing rollers (211), and the middle roller diameter of the pressing roller (211) is smaller than the roller diameter at both ends, the top of the pressing roller frame is provided with two longitudinally extending rollers, and the top of the rollers is provided with a vertical sliding frame (17) capable of sliding up and down, and the two opposite sides of the main pressing frame (5) are reserved with guide strips (503) adapted to the vertical sliding frame (17); the bottom extension end of the punching machine (4) is provided with an adjustable and telescopic central protruding rod, and the bottom end of the central protruding rod is fixed to the upper surface of the vertical sliding frame (17).

9. The sheet metal ridging device for electromagnetic shielding equipment according to claim 8, characterized in that: An arch-shaped fixing frame (8) is fixed to the side of the main pressing frame (5), and an electric push rod (6) extending horizontally toward the position of the edge pressing mechanism (21) is arranged in the middle of the arch-shaped fixing frame (8), and an extension rod of the electric push rod (6) is fixed to the side of the pressing roller frame.

10. The sheet metal ridging device for electromagnetic shielding equipment according to claim 1, characterized in that: A fixed plug block (504) is fixed at the top of the installation notch (505) of the main pressing frame (5), and a bearing frame (15) is fixed on the opposite sides of the two fixed plug blocks (504). A transmission shaft is rotatably connected in the bearing frame (15). A half gear (14) and a reduction motor (16) are respectively fixed at both ends of the transmission shaft. The half gear (14) is meshed with the teeth on the back of the arc-shaped impact rod (11) on the side. A control panel (2) is arranged on the surface of the punching frame (3) near the top.

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