A rapid stamping device for manufacturing computer case

Abstract

The present invention relates to the technical field of chassis manufacturing, and discloses a rapid stamping device for manufacturing a computer chassis, including a die assembly, a punch assembly, and a pressing drive, wherein the punch assembly is provided with a plurality of electric control assemblies, the die assembly and the punch assembly are buckled to stamp a sheet through a sliding frame, and the output end of the pressing drive pushes the sliding frame to extrude the sheet with the punch assembly, and a cavity is provided in the punch assembly, and a lifting plate slides in the cavity. The setting of the pressing hole head of the present invention directly presses against the sheet under the pushing action of a spiral rod during the pressing process of the pressing hole head, and punches a circular hole on the surface of the sheet, and the setting of the cutting head directly inserts into the sheet under the action of the pressing hole head to form a gap in the sheet, and under the pushing action of the spiral rod, the cutting head will no longer descend after penetrating the sheet, but will slide with the cutting head, thereby achieving the effect of the cutting head sliding and cutting on the sheet.

Description

A rapid stamping device for manufacturing computer case Technical Field

[0001] The invention relates to the technical field of chassis manufacturing, and in particular to a rapid punching device for manufacturing a computer chassis. Background Art

[0002] The computer case includes an outer shell, which is usually made of a combination of steel plates and plastics and has a high hardness. Its main function is to protect the components inside the case from external collisions, extrusions and dust intrusion; it also includes a bracket for fixing the motherboard, power supply and various drivers. In the device for manufacturing such a computer case, stamping equipment is usually used to stamp the plate, but there are several problems in the stamping process:

[0003] First of all, conventional stamping is performed on a whole piece of sheet material. During the stamping process, the chassis plate usually has stamping holes of various shapes, and the conventional stamping device can only stamp out a whole piece of sheet material. However, the stamping holes or rectangular holes at specific positions on the sheet material cannot be formed in one press. Usually, subsequent drilling or re-stamping is required, but it cannot be stamped in one time. The conventional technical means for the stamping holes on the side cannot be formed in one time.

[0004] Therefore, we designed a rapid stamping device for manufacturing computer cases. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that punching holes or rectangular holes at specific positions on a plate cannot be formed by one press, and usually require subsequent drilling or re-punching, and a rapid punching device for computer case manufacturing is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A rapid stamping device for manufacturing computer cases comprises a die assembly, a punch assembly and a pressing drive member, wherein the punch assembly is provided with a plurality of electronic control components, the die assembly and the punch assembly are buckled together to stamp a sheet material through a sliding frame, and the output end of the pressing drive member pushes the sliding frame to extrude the sheet material with the punch assembly, a cavity is provided in the punch assembly, and a lifting plate slides in the cavity, and the bottom of the lifting plate is flush with the bottom surface of the punch assembly, a side groove in a circular shape is provided on the inner wall of the cavity, a sliding positioning tube slides in the side groove, and a plurality of secondary punches for secondary processing of the sheet material are provided in the sliding positioning tube, and a spiral rod for pushing and pressing the secondary punch down is also provided in the sliding positioning tube.

[0008] Preferably, a bottom hole is provided at the bottom of the sliding positioning tube to facilitate the extension of the secondary punch, and a plurality of base frame side plates for slidingly limiting the secondary punch are provided in the sliding positioning tube. An axial groove is provided on the base frame side plate, and a rotating shaft slides in the axial groove. The secondary punch is fixed through the rotating shaft, a ring is sleeved on the rotating shaft, and a first reset spring for resetting the secondary punch is provided in the axial groove, one end of the first reset spring is fixed to the axial groove, and the other end is fixed to the ring.

[0009] Preferably, an electromagnetic generator is provided on one side of the base frame side plate, and a magnet block is fixed on the rotating shaft, and the side of the magnet block facing the electromagnetic generator and the side away from the electromagnetic generator are N poles and S poles respectively.

[0010] Preferably, a pressing frame is provided on one side of the secondary punch, and the pressing frame and the side plate of the base frame are connected to the symmetrical two side walls of the inner wall of the sliding positioning tube through a telescopic reset part, and an electromagnetic driving part is provided in the sliding positioning tube.

[0011] Preferably, the telescopic reset portion comprises:

[0012] A first rotating ball and a second rotating ball, wherein a sleeve and an insertion rod are fixed to the first rotating ball and the second rotating ball respectively, and the sleeve and the insertion rod are coaxially telescopically arranged;

[0013] A second return spring, a fixing platform is arranged on the outer side wall of the sleeve, and the second return spring is sleeved on the outer side wall of the insertion rod, one end of the second return spring is fixed to the fixing platform, and the other end is fixed to the inner wall of the sliding positioning tube.

[0014] Preferably, the secondary punch comprises:

[0015] A pressing hole head and a cutting head, wherein the pressing hole head and the cutting head are connected end to end, the cutting head has a blade, and the rotating shaft is fixed to the pressing hole head through a fixing hole;

[0016] The axis of the rotating shaft and the axis of the pressing hole head are perpendicular to each other, and the distance from the axis of the rotating shaft to the end face of the pressing hole head is the same as the distance from the axis of the rotating shaft to the blade of the cutting head.

[0017] Preferably, the secondary punch further comprises:

[0018] A first positioning hole and a second positioning hole, wherein the first positioning hole and the second positioning hole are both provided in two, the spacing between the two first positioning holes is the same as the spacing between the two second positioning holes, and the first positioning hole and the second positioning hole are respectively provided on the pressing hole head and the cutting tool head, and the first positioning hole and the second positioning hole are adapted to the pressing frame;

[0019] The built-in groove is opened at the bottom of the second positioning hole, and the width of the built-in groove is smaller than the width of the second positioning hole.

[0020] Preferably, the pressing frame comprises:

[0021] A triangular block, wherein two plug plates are provided at the bottom of the triangular block, the spacing between the two plug plates is the same as the spacing between the two first positioning holes, and the spacing between two adjacent triangular blocks is the same as the pitch of the screw rod;

[0022] The cross section of the triangular block is an isosceles triangle, and an inner cavity is provided in the triangular block, and a lifting hole communicating with the inner cavity is provided on the plug plate.

[0023] Preferably, a top plate is provided in the inner cavity for lifting and sliding, and a lifting rod fixed to the top plate is provided in the lifting hole, and the distance from the top of the top plate to the bottom of the lifting rod is greater than the distance from the top of the triangle block to the bottom of the plug plate.

[0024] Preferably, the two insert plates have a curved surface on one side facing the secondary punch.

[0025] The beneficial effects of the present invention are:

[0026] 1. The setting of the pressing hole head of the present invention directly presses against the plate under the pushing action of the spiral rod during the pressing process of the pressing hole head, and punches a round hole on the surface of the plate. The setting of the cutting head directly inserts into the plate under the action of the pressing hole head to form a gap in the plate. Under the pushing action of the spiral rod, the cutting head will no longer descend after penetrating the plate, but will slide with the cutting head, thereby achieving the effect of the cutting head sliding and cutting on the plate.

[0027] 2. The cutting head of the present invention slides and cuts on the plate. At this time, the height of the pressing frame is raised. After the cutting head penetrates the plate, the spiral rod passes over the top of the triangular block and abuts against the top plate. The spiral rod will still slide on the plate with the pressing frame and the cutting head. At this time, the sliding cutting of the plate will continue, and a rectangular hole will be cut in the plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic structural diagram of a rapid punching device for manufacturing a computer case according to the present invention;

[0029] FIG2 is a schematic diagram of the internal structure of a punch assembly in a rapid stamping device for manufacturing a computer case according to the present invention;

[0030] FIG3 is a partial exploded view of a punch assembly in a rapid stamping device for manufacturing a computer case according to the present invention;

[0031] FIG4 is a schematic structural diagram of a sliding positioning tube in a rapid punching device for manufacturing a computer case proposed by the present invention;

[0032] FIG5 is a partial exploded view of a sliding positioning tube in a rapid punching device for manufacturing a computer case proposed by the present invention;

[0033] FIG6 is a schematic diagram of the sliding cutting state of the secondary punch in a rapid punching device for manufacturing a computer case proposed by the present invention;

[0034] FIG7 is a schematic diagram of the internal structure of a pressing head in a rapid punching device for manufacturing a computer case according to the present invention;

[0035] FIG8 is a front view of a sliding cutting state of a secondary punch in a rapid punching device for manufacturing a computer case proposed by the present invention;

[0036] FIG9 is a schematic diagram of a first state of a secondary punch in a rapid punching device for manufacturing a computer case according to the present invention;

[0037] FIG10 is a partial cross-sectional view of a first state of a secondary punch in a rapid punching device for manufacturing a computer case according to the present invention;

[0038] FIG11 is a partial cross-sectional view of a second state of a secondary punch in a rapid punching device for manufacturing a computer case according to the present invention;

[0039] FIG. 12 is a schematic structural diagram of a telescopic reset portion in a rapid stamping device for manufacturing a computer case according to the present invention.

[0040] In the figure: 1. Concave mold assembly; 2. Punch mold assembly; 3. Sliding frame; 4. Pressing drive member; 5. Electric control assembly; 6. Side slide groove; 7. Lifting plate; 8. Sliding positioning tube;

[0041] 9. Secondary punch; 91. Pressing hole head; 92. Cutting head; 93. Fixing hole; 94. First positioning hole; 95. Second positioning hole; 96. Built-in slot;

[0042] 10. Pressing frame; 101. Triangular block; 102. Insert plate; 103. Curved surface; 104. Top plate; 105. Inner cavity; 106. Lifting rod;

[0043] 11. spiral rod; 12. shaft groove; 13. side plate of base frame; 14. first return spring; 15. rotating shaft; 16. magnet block; 17. electromagnetic generator;

[0044] 18. telescopic reset part; 181. first rotating ball; 182. second rotating ball; 183. sleeve; 184. insertion rod; 185. second reset spring;

[0045] 19. Bottom hole. DETAILED DESCRIPTION

[0046] Referring to Figures 1 to 12, a rapid stamping device for manufacturing a computer case includes a die assembly 1, a punch assembly 2 and a pressing drive 4, wherein the die assembly 1 and the punch assembly 2 cooperate with each other, the sheet to be stamped is placed in the die assembly 1, and then the stamped sheet is pushed by the pressing drive 4, wherein the die assembly 1 and the punch assembly 2 are engaged with the stamped sheet through the sliding frame 3, and the output end of the pressing drive 4 pushes the sliding frame 3 to extrude the sheet with the punch assembly 2 to complete the initial stamping of the sheet, wherein the pressing drive 4 is the prior art, and the pressing drive 4 is a hydraulic press, which drives the punch assembly 2 to press down, and will not be elaborated on here.

[0047] A cavity is provided in the punch assembly 2, and a lifting plate 7 slides in the cavity, and the bottom of the lifting plate 7 is flush with the bottom surface of the punch assembly 2. It should be noted that the bottom of the lifting plate 7 is flush with the bottom surface of the punch assembly 2 to ensure that the contact surface with the sheet is flat during the process of the pressing drive part 4 driving the punch assembly 2 to press down and punch the sheet, so as to avoid unevenness of the sheet close to the bottom surface of the punch assembly 2 during the stamping process.

[0048] The inner wall of the cavity is provided with a side slide groove 6 in a circular shape, and four sliding positioning tubes 8 slide in the side slide groove 6. These four sliding positioning tubes 8 are arranged in a tic-tac-toe pattern, which is convenient for subsequent processing of various hole types. When the stamping is completed, it is necessary to control the external lifting mechanism to retract the lifting plate 7 into the cavity, and push the sliding positioning tube 8 in the side slide groove 6 to slide, as shown in the state of Figure 3, so that the sliding positioning tube 8 in the side slide groove 6 is located on the surface of the plate in the female mold component 1, wherein the punch component 2 is provided with a plurality of electric control components 5, which drive the sliding positioning tube 8 to move to the specified position through program control and driving equipment, and drive the spiral rod 11 in the sliding positioning tube 8 to rotate, and can select the corresponding number of secondary punches 9 in the sliding positioning tube 8, and the electric control component 5 is used to select the number and position of punching holes in the plate, so as to locate the corresponding punching position on the plate surface, wherein the electric control component 5 is a prior art and will not be elaborated on here.

[0049] Referring to the states of Figures 4 and 5, a plurality of secondary punches 9 for secondary processing of the sheet are provided in the sliding positioning tube 8, and a bottom hole 19 is provided at the bottom of the sliding positioning tube 8 for facilitating the extension of the secondary punch 9, wherein the secondary punch 9 extends out of the bottom surface of the sliding positioning tube 8 under the pushing action and contacts the sheet on the die assembly 1, and then the secondary punch 9 is continuously pressed downward to complete the secondary pressing and punching of the sheet.

[0050] A plurality of base side plates 13 for slidingly limiting the secondary punch 9 are provided in the sliding positioning tube 8. An axial groove 12 is opened on the base side plate 13, and a rotating shaft 15 slides in the axial groove 12. A collar is sleeved on the rotating shaft 15. A first return spring 14 for resetting the secondary punch 9 is provided in the axial groove 12. One end of the first return spring 14 is fixed to the axial groove 12, and the other end is fixed to the collar. It should be noted that the secondary punch 9 rises and falls and slides on the base side plate 13 through the rotating shaft 15 and the axial groove 12. Therefore, after the secondary punch 9 is pressed and the pressure on the secondary punch 9 is released, the secondary punch 9 will be reset under the action of the first return spring 14, and the original state of extending out of the sliding positioning tube 8 will change to the state of retracting into the sliding positioning tube 8.

[0051] An electromagnetic generator 17 is provided on one side of the base side plate 13. Under the control of the electronic control component 5, the electromagnetic generator 17 on the corresponding base side plate 13 is selectively energized, that is, the electromagnetic generator 17 above the punching position is energized, and a magnet block 16 is fixed on the rotating shaft 15. The side of the magnet block 16 facing the electromagnetic generator 17 and the side away from the electromagnetic generator 17 are the N pole and the S pole respectively.

[0052] It should be noted that the current flowing through the electromagnetic generator 17 is forward current and reverse current, so two kinds of magnetic poles will be generated on the side facing the magnet block 16. The secondary punch 9 is fixed through the rotating shaft 15, so the rotating shaft 15 with the magnet block 16 will be driven to rotate, and then the secondary punch 9 on the rotating shaft 15 will be driven to rotate 180°, so the secondary punch 9 will be adjusted to face the end of the plate. The electromagnetic generator 17 is energized to generate magnetic poles, which is a prior art and will not be elaborated on here.

[0053] A pressing frame 10 is provided on one side of the secondary punch 9. The pressing frame 10 and the base frame side plate 13 are connected to the symmetrical two side walls of the inner wall of the sliding positioning tube 8 through the telescopic reset portion 18. This arrangement can ensure that the base frame side plate 13 and the pressing frame 10 are always located in the same vertical plane and are reset and connected to the inner wall of the sliding positioning tube 8. In this way, when the pressing frame 10 moves toward the base frame side plate 13, it will adapt to the secondary punch 9 on the base frame side plate 13.

[0054] An electromagnetic driving part is provided in the sliding positioning tube 8, and the electromagnetic driving part is an electromagnetic ejection device, which is controlled by the electronic control component 5. The electromagnetic driving part above the punching position is turned on, so that the base frame side plate 13 moves with the secondary punch 9 to the top of the bottom hole 19, and the pressing frame 10 also moves to the top of the bottom hole 19 under the action of the electromagnetic driving part, but at this time, the pressing frame 10 will first contact with the secondary punch 9 and then squeeze and lift it to the top of the secondary punch 9, and then insert it into the first positioning hole 94 or the second positioning hole 95 to complete the positioning of the secondary punch 9.

[0055] A spiral rod 11 is also provided in the sliding positioning tube 8 for pushing and pressing the secondary punch 9 to descend. It should be noted that the spacing between two adjacent triangular blocks 101 is the same as the pitch of the spiral rod 11. At this time, the pressing frame 10 is against the spiral rod 11. At this time, the rotation of the spiral rod 11 will push the pressing frame 10 to have a tendency to move forward and downward. Since the second reset spring 185 on the telescopic reset part 18 connected to the base frame side plate 13 has a large elastic coefficient, the base frame side plate 13 will not be driven to slide in the sliding positioning tube 8 under the pushing action of the spiral rod 11, but will first drive the pressing frame 10 to squeeze the secondary punch 9 down and complete the punching operation of the secondary punch 9 on the plate.

[0056] The telescopic reset part 18 includes a first rotating ball 181 and a second rotating ball 182, on which a sleeve 183 and an insert rod 184 are fixed respectively, and the sleeve 183 and the insert rod 184 are coaxially telescopically arranged, and a fixed platform is provided on the outer wall of the sleeve 183, and a second reset spring 185 is sleeved on the outer wall of the insert rod 184, one end of the second reset spring 185 is fixed to the fixed platform, and the other end is fixed to the inner wall of the sliding positioning tube 8, so that it can be ensured that during the swinging process of the two ends of the telescopic reset part 18, under the action of the second reset spring 185, it will be reset without external force.

[0057] Referring to the state of FIG9 , the secondary punch 9 includes a pressing hole head 91 and a cutting head 92, the pressing hole head 91 and the cutting head 92 are connected end to end, the cutting head 92 has a blade, and the rotating shaft 15 is fixed to the pressing hole head 91 through a fixing hole 93. It should be noted that the pressing hole head 91 and the cutting head 92 are for two hole types in the punching process;

[0058] The pressing hole head 91 is arranged so that when the pressing hole head 91 is pressed down, the screw rod 11 directly presses against the plate to punch a round hole on the surface of the plate;

[0059] The cutting head 92 is directly inserted into the plate under the action of pressing the hole head 91 to form a gap in the plate. Under the pushing action of the spiral rod 11, the cutting head 92 will no longer drop after penetrating the plate, but will slide with the cutting head 92, thereby achieving the effect of the cutting head 92 sliding and cutting on the plate. The sliding positioning tubes 8 are set in four and are in a tic-tac-toe shape. Therefore, the cutting heads 92 in the four sliding positioning tubes 8 are pressed down and slid respectively to achieve rectangular cutting of the plate.

[0060] The axis of the rotating shaft 15 is perpendicular to the axis of the pressing hole head 91, and the distance from the axis of the rotating shaft 15 to the end face of the pressing hole head 91 is the same as the distance from the axis of the rotating shaft 15 to the blade of the cutting head 92. This arrangement can ensure that when the rotating shaft 15 rotates, the distance from the lowest point of the secondary punch 9 to the plate is a constant.

[0061] The secondary punch 9 also includes a first positioning hole 94 and a second positioning hole 95. The first positioning hole 94 and the second positioning hole 95 are both set in two. The spacing between the two first positioning holes 94 is the same as the spacing between the two second positioning holes 95, and the first positioning hole 94 and the second positioning hole 95 are respectively opened on the pressing hole head 91 and the cutting head 92. The pressing frame 10 includes a triangular block 101. Two plug plates 102 are provided at the bottom of the triangular block 101. The spacing between the two plug plates 102 is the same as the spacing between the two first positioning holes 94, and the first positioning hole 94 and the second positioning hole 95 are adapted to the pressing frame 10.

[0062] A curved surface 103 is provided on one side of the two insert plates 102 facing the secondary punch 9 so that when the pressing frame 10 moves toward the secondary punch 9, the curved surface of the insert plate 102 will first touch the curved surface 103, and then the insert plate 102 will be lifted. After the insert plate 102 reaches the top of the secondary punch 9, under the action of the telescopic reset part 18, the two insert plates 102 are inserted into the first positioning hole 94 or the second positioning hole 95.

[0063] A top plate 104 is provided in the inner cavity 105 for lifting and sliding, and a lifting rod 106 fixed to the top plate 104 is provided in the lifting hole. The distance from the top of the top plate 104 to the bottom of the lifting rod 106 is greater than the distance from the top of the triangle block 101 to the bottom of the plug plate 102.

[0064] 10 and 11, the built-in groove 96 is provided at the bottom of the second positioning hole 95, and the width of the built-in groove 96 is smaller than the width of the second positioning hole 95. The cross-section of the triangular block 101 is an isosceles triangle, and an inner cavity 105 is provided in the triangular block 101. A lifting hole connected to the inner cavity 105 is provided on the plug plate 102. This arrangement is to ensure that after the plug plate 102 is inserted, when it is in the state of FIG. 10, the lifting rod 106 in the plug plate 102 will be lifted up and lift the top plate 104, which will increase the height of the pressing frame 10. When it is in the state of FIG. 11, the lifting rod 106 will not be lifted up, that is, the height of the pressing frame 10 will not increase at this time.

[0065] That is, in the state corresponding to Figure 11, the pressing hole head 91 is pressed downward to punch a circular hole on the surface of the plate. At this time, the height of the pressing frame 10 remains unchanged. Under the pushing action of the spiral rod 11, the pressing frame 10 is just pushed to the bottom. At this time, the pressing hole head 91 just completes the operation of punching the circular hole on the surface of the plate. The spiral rod 11 passes over the top of the pressing frame 10 and no longer presses the pressing hole head 91, completing the punching of the circular hole.

[0066] In the state of Figure 10, the cutting head 92 slides and cuts on the plate. At this time, the height of the pressing frame 10 is raised. After the cutting head 92 penetrates the plate, the spiral rod 11 passes over the top of the triangular block 101 and abuts against the top plate 104. The spiral rod 11 will still slide on the plate with the pressing frame 10 and the cutting head 92, and the sliding cutting of the plate will continue. At this time, a rectangular hole cut of the plate will be formed.

[0067] The working principle of the present invention is as follows:

[0068] The female die assembly 1 and the male die assembly 2 are buckled together to punch the sheet through the sliding frame 3, and the output end of the pressing driving member 4 pushes the sliding frame 3 to extrude the sheet with the male die assembly 2 to complete one punching;

[0069] Then the external lifting mechanism is controlled to retract the lifting plate 7 into the cavity, and the sliding positioning tube 8 in the side slide groove 6 is pushed to slide. The electronic control component 5 is used to select the number and position of punching of the plate, so as to position the corresponding punching position on the surface of the plate. The secondary punch 9 extends out of the bottom surface of the sliding positioning tube 8 under the pushing action and contacts the plate on the die assembly 1. Then the secondary punch 9 is continuously pressed downward to complete the secondary pressing and punching of the plate.

[0070] The pressing hole head 91 and the cutting head 92 are for two hole types in the punching process;

[0071] The pressing hole head 91 is arranged so that when the pressing hole head 91 is pressed down, the screw rod 11 directly presses against the plate to punch a round hole on the surface of the plate;

[0072] The cutting head 92 is directly inserted into the plate under the action of pressing the hole head 91 to form a gap in the plate. Under the pushing action of the spiral rod 11, the cutting head 92 will no longer drop after penetrating the plate, but will slide with the cutting head 92, thereby achieving the effect of the cutting head 92 sliding and cutting on the plate. The sliding positioning tubes 8 are set in four and are in a tic-tac-toe shape. Therefore, the cutting heads 92 in the four sliding positioning tubes 8 are pressed down and slid respectively to achieve rectangular cutting of the plate.

[0073] 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 rapid stamping device for manufacturing a computer case, comprising a die assembly (1), a punch assembly (2) and a pressing drive member (4), wherein the punch assembly (2) is provided with a plurality of electric control components (5), characterized in that: The female mold assembly (1) and the male mold assembly (2) are engaged with each other to punch the plate through the sliding frame (3), and the output end of the pressing driving member (4) pushes the sliding frame (3) to extrude the plate with the male mold assembly (2). A cavity is provided in the male mold assembly (2), and a lifting plate (7) is slidable in the cavity, and the bottom of the lifting plate (7) is flush with the bottom surface of the male mold assembly (2). A side sliding groove (6) in the shape of a circle is provided on the inner wall of the cavity, and a sliding positioning member (6) is slidable in the side sliding groove (6). A tube (8) is provided, and a plurality of secondary punches (9) for performing secondary processing on the plate are arranged in the sliding positioning tube (8), a spiral rod (11) for pushing and pressing the secondary punches (9) down is also arranged in the sliding positioning tube (8), a pressing frame (10) is arranged on one side of the secondary punches (9), a plurality of base frame side plates (13) for slidingly limiting the secondary punches (9) are arranged in the sliding positioning tube (8), and a rotating shaft (15) is arranged on the base frame side plate (13).

2. A rapid punching device for manufacturing a computer case according to claim 1, characterized in that: The bottom of the sliding positioning tube (8) is provided with a bottom hole (19) for the secondary punch (9) to extend out, the side plate (13) of the base frame is provided with an axial groove (12), and the rotating shaft (15) slides in the axial groove (12), the secondary punch (9) and the rotating shaft (15) are fixed through and through, the rotating shaft (15) is sleeved with a collar, and the axial groove (12) is provided with a first reset spring (14) for resetting the secondary punch (9), one end of the first reset spring (14) is fixed to the axial groove (12), and the other end is fixed to the collar.

3. A rapid punching device for manufacturing a computer case according to claim 2, characterized in that: An electromagnetic generator (17) is provided on one side of the base frame side plate (13), and a magnet block (16) is fixed on the rotating shaft (15). The magnet block (16) has an N pole and an S pole on the side facing the electromagnetic generator (17) and the side away from the electromagnetic generator (17), respectively.

4. A rapid punching device for manufacturing a computer case according to claim 1, characterized in that: The pressing frame (10) and the base frame side plate (13) are both connected to the symmetrical two side walls of the inner wall of the sliding positioning tube (8) through a telescopic reset portion (18), and an electromagnetic driving portion is provided in the sliding positioning tube (8).

5. A rapid punching device for manufacturing a computer case according to claim 4, characterized in that: The telescopic reset part (18) comprises: a first rotating ball (181) and a second rotating ball (182), wherein a sleeve (183) and an insert rod (184) are fixed to the first rotating ball (181) and the second rotating ball (182), respectively, and the sleeve (183) and the insert rod (184) are coaxially telescopically arranged; and a second reset spring (185), wherein an outer wall of the sleeve (183) is provided with a fixed platform, and the second reset spring (185) is sleeved on the outer wall of the insert rod (184), and one end of the second reset spring (185) is fixed to the fixed platform, and the other end is fixed to the inner wall of the sliding positioning tube (8).

6. A rapid punching device for manufacturing a computer case according to claim 1, characterized in that: The secondary punch (9) comprises: a pressing hole head (91) and a cutting head (92); the pressing hole head (91) and the cutting head (92) are connected end to end; the cutting head (92) has a blade; the rotating shaft (15) is fixed to the pressing hole head (91) through a fixing hole (93); the axis of the rotating shaft (15) and the axis of the pressing hole head (91) are perpendicular to each other, and the distance from the axis of the rotating shaft (15) to the end face of the pressing hole head (91) is the same as the distance from the axis of the rotating shaft (15) to the blade of the cutting head (92).

7. A rapid punching device for manufacturing a computer case according to claim 6, characterized in that: The secondary punch (9) further comprises: a first positioning hole (94) and a second positioning hole (95), wherein the first positioning hole (94) and the second positioning hole (95) are both provided in pairs, the spacing between the two first positioning holes (94) is the same as the spacing between the two second positioning holes (95), and the first positioning hole (94) and the second positioning hole (95) are respectively provided on the pressing hole head (91) and the cutting head (92), and the first positioning hole (94) and the second positioning hole (95) are adapted to the pressing frame (10); and a built-in groove (96), wherein the built-in groove (96) is provided at the bottom of the second positioning hole (95), and the width of the built-in groove (96) is smaller than the width of the second positioning hole (95).

8. A rapid punching device for manufacturing a computer case according to claim 1, characterized in that: The pressing frame (10) comprises: a triangular block (101), two plugging plates (102) are arranged at the bottom of the triangular block (101), the spacing between the two plugging plates (102) is the same as the spacing between the two first positioning holes (94), and the spacing between two adjacent triangular blocks (101) is the same as the pitch of the screw rod (11); the cross section of the triangular block (101) is an isosceles triangle, and an inner cavity (105) is provided in the triangular block (101), and a lifting hole connected to the inner cavity (105) is provided on the plugging plate (102).

9. A rapid punching device for manufacturing a computer case according to claim 8, characterized in that: A top plate (104) is provided in the inner cavity (105) for lifting and sliding, and a lifting rod (106) fixed to the top plate (104) is provided in the lifting hole, and the distance from the top of the top plate (104) to the bottom of the lifting rod (106) is greater than the distance from the top of the triangle block (101) to the bottom of the plug plate (102).

10. A rapid punching device for manufacturing a computer case according to claim 9, characterized in that: The two insert plates (102) are provided with a curved surface (103) on one side facing the secondary punch (9).

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