Metal product punch forming machine

Abstract

The invention discloses a metal product stamping forming machine, and particularly relates to the technical field of stamping devices, the metal product stamping forming machine comprises a stamping base, a mounting seat and a lower die, the lower die comprises a lower die part and a connecting part, the top surface of the lower die part is provided with a die cavity, and the periphery of the lower die part is provided with a slit; the upper die is driven by a stamping unit mounted on the mounting seat to vertically move, so that the upper die is clamped into the die cavity; the magnetic block is clamped in a mounting groove formed in the top surface of the lower die part, and the lower die part is provided with a driving unit; and a detection unit. The lower die part is arranged to be clamped into the taper hole, the inner wall of the taper hole generates extrusion force on the lower die part, then the lower die part generates elastic shrinkage deformation, the thin seam is closed, meanwhile, after the inner side wall of the die cavity clamps, positions and punches a metal plate, the lower die part moves upwards, the lower die part expands elastically, and therefore the metal plate is punched. Therefore, the abutting force of the inner side wall of the die cavity on the metal plate disappears, and the metal plate can be smoothly discharged from the die cavity after being punched and formed.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping devices, and more specifically, to a metal product stamping forming machine. Background Art

[0002] Stamping is a forming method that uses a press and a die to apply external force to plates, strips, pipes and profiles to cause plastic deformation or separation, thereby obtaining a workpiece (stamping part) of the desired shape and size. Stamping and forging are both plastic processing (or pressure processing), collectively known as forging. The blanks for stamping are mainly hot-rolled and cold-rolled steel plates and strips.

[0003] When stamping a metal sheet into a "F" shape, the upper die is mainly used to squeeze the metal sheet so that the middle of the metal sheet is squeezed into the lower die to complete the stamping of the metal sheet. Since the stamping process is relatively short, the toughness of the metal sheet itself may be high. After stamping, elastic deformation occurs, such as Fig.12 As shown, the metal sheet after stamping is in the shape of a "J", and includes horizontal segments 1a at both ends, a middle segment 1c and vertical segments 1b at both ends. The bending angles of the horizontal segments 1a, the middle segment 1c and the vertical segments 1b at both ends of the metal sheet after stamping are all 90°. If the metal sheet material to be stamped has high toughness, after stamping, the bending angles of the vertical segments 1b at both ends and the horizontal segments 1a may be greater than 90°, so that the horizontal segments 1a at both ends of the metal sheet after stamping and the middle segment 1c of the metal sheet are not parallel, thereby reducing the stamping accuracy. In addition, if the metal sheet after stamping has high toughness, the bending angles of the vertical segments 1b and the horizontal segments 1a may be greater than 90°, so that the vertical segment 1b and the lower die surface have a certain extrusion pressure, resulting in difficulty in unloading. Therefore, it is necessary to have a forming equipment that can detect the stamping accuracy of the metal sheet after stamping and facilitate unloading. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a metal product stamping forming machine. The technical problem to be solved by the present invention is: due to the high toughness of the metal sheet in the prior art, the horizontal sections and the middle sections at both ends may not be parallel after stamping, resulting in reduced stamping accuracy, and the vertical section and the lower die surface have a certain extrusion pressure, resulting in difficulty in unloading. Therefore, a forming equipment that can detect the stamping accuracy of the metal sheet after stamping and is convenient for unloading is needed.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A metal product stamping forming machine comprises a stamping base and a mounting seat fixedly connected to the top surface of the stamping base, and further comprises:

[0007] A lower mold, the lower mold includes a coaxially fixed lower mold part and a connecting part from top to bottom, the outer diameter of the lower mold part decreases from top to bottom, a mounting hole for mounting the connecting part is provided on the top of the mounting seat, a tapered hole for engaging the lower mold part is also provided on the top of the mounting seat, the tapered hole is coaxial with and connected to the mounting hole, the lower mold part cooperates with the tapered hole, a mold cavity is provided on the top surface of the lower mold part, a slit extending to the circumference of the connecting part is provided on the periphery of the lower mold part, and the slit is connected to the mold cavity;

[0008] An upper die, which is arranged directly above the lower die and driven to move vertically by a punching unit mounted on the mounting seat so that the upper die is inserted into the die cavity;

[0009] A magnetic block, wherein the magnetic block is engaged in a mounting groove provided on the top surface of the lower mold portion, and the lower mold portion is provided with a driving unit for driving the magnetic block to move upward when the lower mold portion is elastically expanded and deformed;

[0010] The detection unit is provided with two detection units and is arranged on the top surface of the mounting seat, and the two detection units are symmetrically arranged along the axis of the lower mold part.

[0011] Furthermore, the stamping base is provided with a placement cavity extending to the mounting seat, a hydraulic cylinder is installed in the placement cavity, a piston rod of the hydraulic cylinder passes through the mounting hole and is fixedly connected to the connecting portion.

[0012] Furthermore, the stamping unit includes a horizontal plate connected to the top of the mounting seat through a vertical plate, a stamping cylinder is vertically installed on the top of the horizontal plate, a piston rod of the stamping cylinder is fixedly connected to a mounting block, and the upper mold is connected to the bottom surface of the mounting block.

[0013] Furthermore, the driving unit includes a plurality of arc-shaped wedge blocks fixedly connected to the inner wall of the mounting groove, an annular groove is provided on the periphery of the magnetic block, the top surface of the arc-shaped wedge block abuts against the upper inner wall of the annular groove, and an elastic abutting component is provided in the lower mold part for driving the magnetic block to move downward.

[0014] Furthermore, the elastic abutment assembly includes a sliding rod coaxially fixed to the bottom of the magnetic block, the sliding rod slides freely in the lower mold part and the connecting part, the lower end of the sliding rod is fixedly sleeved with a limiting nut, the connecting part and the lower mold part are jointly provided with an avoidance groove for the limiting nut to engage, a first spring is provided in the avoidance groove, the first spring is wrapped around the sliding rod, and the two ends of the first spring in the direction of elastic force respectively and elastically abut the limiting nut and the top wall of the avoidance groove in a one-to-one correspondence.

[0015] Furthermore, when the top surface of the magnetic block is flush with the inner bottom wall of the mold cavity, the lower end surface of the sliding rod abuts against the inner bottom wall of the air avoidance groove.

[0016] Further, the detection unit includes a detection block connected to the mounting seat, a driving rod is horizontally penetrated through the detection block, the driving rod slides freely on the detection block, a movable baffle is fixedly connected to one end of the driving rod facing the lower mold portion, a detection rod is horizontally penetrated through the upper side of the detection block, the detection rod slides freely on the detection block, a feeler gauge is horizontally fixedly connected to one end of the detection rod facing the lower mold portion, and a transmission assembly is provided on the detection block, and the transmission assembly is used to drive the detection rod to move in the opposite direction when the driving rod moves horizontally.

[0017] Furthermore, one end of the driving rod adjacent to the movable baffle is sleeved with a limit ring, and a second spring is sleeved around the driving rod, and two ends of the second spring in the elastic force direction elastically press against the limit ring and the detection block respectively.

[0018] Furthermore, the transmission assembly includes a rotating gear rotatably connected to the detection block, the driving rod is provided with a rack portion meshing with the rotating gear at the periphery, a toggle rod is fixedly connected to the rotating gear, and the detection rod is provided with a notch groove for the toggle rod to engage.

[0019] Furthermore, the width of the inner wall of the notch groove increases from top to bottom.

[0020] Technical effects and advantages of the present invention:

[0021] 1. By setting the lower die part to be inserted into the tapered hole, the inner wall of the tapered hole generates an extrusion force on the lower die part, thereby causing the lower die part to produce elastic contraction deformation, so that the slit is closed, and at the same time, the inner wall of the die cavity clamps and positions the metal sheet. After stamping, the lower die part moves upward, so that the lower die part expands elastically, so that the pressing force of the inner wall of the die cavity on the metal sheet disappears, so that the metal sheet can be unloaded from the die cavity more smoothly after stamping;

[0022] 2. By setting up a magnetic block, a detection unit and a driving unit, after the stamping is completed, the lower die moves upward and expands elastically, so that the driving unit can drive the magnetic block to move upward relative to the lower die, and produce a lifting effect on the middle section of the stamped metal sheet, so that the metal sheet is lifted to the outside of the die cavity. In addition, during the upward movement of the lower die, the detection unit can be triggered to detect the gap between the bottom surface of the horizontal section of the metal sheet and the upper end surface of the lower die, and then determine whether the horizontal section and the middle section are in a parallel state after stamping;

[0023] 3. By setting a rotating gear and a toggle rod, when the driving rod moves horizontally, the rack part and the gear mesh and rotate, thereby causing the toggle rod to swing. When the toggle rod swings, the detection rod is driven to move horizontally on the detection block, and the horizontal movement amplitude of the detection rod is greater than the horizontal movement amplitude of the driving rod, thereby allowing the feeler gauge to have sufficient stroke to detect the gap between the horizontal section and the upper end surface of the lower mold part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a metal product stamping forming machine in the present invention;

[0025] Figure 2 for Figure 1 A schematic cross-sectional view of a part of the structure;

[0026] Figure 3 It is a schematic diagram of the structure after the connection part, the lower mold part and the hydraulic cylinder are assembled in the present invention;

[0027] Figure 4 for Figure 3 A schematic cross-sectional view of a part of the structure;

[0028] Figure 5 for Figure 4 A schematic diagram of the structure from a front view angle;

[0029] Figure 6 It is a schematic diagram of the structure after the detection block, the driving rod and the detection rod are assembled in the present invention;

[0030] Figure 7 for Figure 6 A schematic cross-sectional view of the middle structure;

[0031] Figure 8 It is a schematic cross-sectional view of the structure after the magnetic block and the lower mold part are assembled in the present invention;

[0032] Fig. 9 for Figure 8 A magnified schematic diagram of the local structure at point A;

[0033] Fig.10 It is a schematic diagram of the structure after the connecting part and the lower mold part are assembled in the present invention;

[0034] Fig.11 for Fig.10 A schematic cross-sectional view of the structure;

[0035] Fig.12 It is a schematic structural diagram of a metal product after stamping in an embodiment of the present invention.

[0036] The accompanying drawings are marked as follows: 1. stamping base; 2. mounting seat; 3. detection block; 4. upper die; 5. mounting block; 6. stamping cylinder; 7. cross plate; 8. magnetic block; 9. lower die; 10. limiting nut; 11. hydraulic cylinder; 12. connecting part; 13. slit; 14. mold cavity; 15. annular groove; 16. first spring; 17. sliding rod; 18. driving rod; 19. limiting ring; 20. movable baffle; 21. feeler gauge; 22. detection rod; 23. second spring; 24. avoidance groove; 25. rack part; 26. notch groove; 27. toggle rod; 28. rotating gear; 29. ​​arc wedge block; 30. mounting groove; 1a. horizontal section; 1b. vertical section; 1c. middle section. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1-Figure 12 As shown, this embodiment discloses: a metal product stamping machine, the raw material of the metal product is a rectangular metal plate (the metal plate can be adsorbed by magnetic force), and the formed metal product is as follows Fig.12 As shown, that is, the formed metal product includes a horizontal section 1a, a vertical section 1b and a middle section 1c in sequence. The stamping forming machine includes a stamping base 1 and a mounting base 2 welded to the top surface of the stamping base 1. The top surface of the mounting base 2 is coaxially provided with a tapered hole and a mounting hole from top to bottom. The aperture of the tapered hole decreases from top to bottom, and the aperture of the mounting hole is connected to the smallest end of the aperture of the tapered hole, so that the tapered hole and the mounting hole are coaxial and connected. A connecting portion 12 is inserted into the mounting hole, and the connecting portion 12 can slide freely up and down in the mounting hole. In addition, the upper end of the connecting portion 12 is coaxially and integrally connected with a lower mold portion 9. The outer diameter of the lower mold portion 9 decreases from top to bottom and can be engaged in the tapered hole. The lower mold portion 9 is used in conjunction with the tapered hole. In addition, a mold cavity 14 is provided on the top surface of the lower mold portion 9, and the longitudinal section of the mold cavity 14 is in a convex shape.

[0039] The periphery of the lower die portion 9 is provided with a slit 13 extending to the periphery of the connecting portion 12, and the slit 13 is connected to the die cavity 14. Vertical plates are vertically welded to the two ends of the top of the mounting seat 2, and the upper ends of the two vertical plates are commonly connected to the horizontal plate 7. A stamping cylinder 6 is vertically installed on the top of the horizontal plate 7, and the piston rod of the stamping cylinder 6 is fixedly connected to the mounting block 5. The bottom of the mounting block 5 is fixedly connected to the upper die 4. The outer contour of the upper die 4 is in a convex shape, and the upper die 4 is arranged directly above the lower die;

[0040] The stamping base 1 is provided with a placement cavity extending to the mounting seat 2, and a hydraulic cylinder 11 is installed in the placement cavity. The piston rod of the hydraulic cylinder 11 passes through the mounting hole and is fixedly connected to the connecting part 12. When the piston rod of the hydraulic cylinder 11 is shortened, it will drive the connecting part 12 to slide downward in the mounting hole, so that the connecting part 12 drives the lower die part 9 to move synchronously, so that the lower die part 9 slides in the tapered hole, and the inner wall of the tapered hole generates an extrusion force along the radial inner side of the lower die part 9 on the periphery of the lower die part 9, so that the lower die part 9 changes from an elastic expansion deformation state to an elastic contraction deformation state, thereby closing the slit 13 on the periphery of the lower die part 9, and at the same time, the inner side walls of the mold cavity 14 divided by the slit 13 are also close to each other, so that the mold cavity 14 forms a complete cavity;

[0041] The top surface of the lower mold part 9 is provided with a blind hole-shaped mounting groove 30, which is connected to the mold cavity 14. A magnetic block 8 is mounted in the mounting groove 30, and the magnetic block 8 slides freely in the mounting groove 30. Four arc-shaped wedge blocks 29 are fixedly connected to the inner wall of the mounting groove 30. An annular groove 15 is provided on the periphery of the magnetic block 8. The top surface of the arc-shaped wedge block 29 abuts against the upper inner wall of the annular groove 15. A sliding rod 17 is coaxially fixedly connected to the bottom of the magnetic block 8. The sliding rod 17 is fixedly connected to the lower mold part 9 and the connecting part 12. Free sliding, the lower end of the sliding rod 17 is fixedly sleeved with the limit nut 10, and the connecting part 12 and the lower mold part 9 are jointly provided with an escape groove 24 for the limit nut 10 to engage, and the escape groove 24 is provided with a first spring 16, which is sleeved around the sliding rod 17, and the two ends of the first spring 16 in the direction of elastic force respectively elastically press against the limit nut 10 and the inner top wall of the escape groove 24 in a one-to-one correspondence, and when the top surface of the magnetic block 8 is flush with the inner bottom wall of the mold cavity 14, the lower end surface of the sliding rod 17 presses against the inner bottom wall of the escape groove 24;

[0042] Two detection blocks 3 are connected to the mounting seat 2. The two detection blocks 3 are arranged in an axial array along the lower mold part 9. A driving rod 18 is horizontally penetrated on the detection block 3. The driving rod 18 slides freely on the detection block 3. A movable baffle 20 is fixedly connected to one end of the driving rod 18 facing the lower mold part 9. A detection rod 22 is horizontally penetrated on the upper side of the detection block 3. The detection rod 22 slides freely on the detection block 3. A feeler gauge 21 is horizontally fixedly connected to one end of the detection rod 22 facing the lower mold part 9. The thickness of the feeler gauge 21 is 0.15 mm. One end of the driving rod 18 adjacent to the movable baffle 20 is sleeved There is a limit ring 19, and the driving rod 18 is wrapped with a second spring 23. The two ends of the second spring 23 in the elastic force direction elastically press against the limit ring 19 and the detection block 3 respectively. In the initial state, the second spring 23 has an elastic pressing force on the limit ring 19, so that the driving rod 18 moves in the direction of the lower mold part 9. A rotating gear 28 is rotatably connected in the detection block 3. A rack part 25 meshing with the rotating gear 28 is provided on the periphery of the driving rod 18, and a toggle rod 27 is fixed to the rotating gear 28. A notch groove 26 for the toggle rod 27 to engage is provided on the periphery of the detection rod 22.

[0043] Working principle of the present invention:

[0044] Clamping the metal sheet: Place the metal sheet flat in the die cavity 14, the upper inner bottom wall of the die cavity 14 supports the bottom of the metal sheet, start the hydraulic cylinder 11, and shorten the piston rod of the hydraulic cylinder 11. When the piston rod of the hydraulic cylinder 11 shortens, it will drive the connecting part 12 to slide downward in the mounting hole, so that the connecting part 12 drives the lower die part 9 to move synchronously, so that the lower die part 9 slides in the tapered hole, and the inner wall of the tapered hole generates an extrusion force on the peripheral edge of the lower die part 9 along the radial inner side of the lower die part 9, so that the lower die part 9 The elastic expansion deformation state is changed into the elastic contraction deformation state, so that the slit 13 on the periphery of the lower mold part 9 is closed, and at the same time, the inner side walls of the mold cavity 14 divided by the slit 13 are also close to each other, so that the mold cavity 14 forms a complete cavity, and the inner side wall processing of the mold cavity 14 generates a clamping force on the edge of the metal sheet, thereby clamping the metal sheet. At this time, the top surface of the magnetic block 8 is flush with the inner bottom wall of the lower space of the mold cavity 14, and the upper end surface of the lower mold part 9 is flush with the top surface of the mounting seat 2;

[0045] Stamping operation: the stamping cylinder 6 is started, the piston rod of the stamping cylinder 6 is extended and drives the upper die 4 to move downward, thereby generating a downward extrusion force on the metal sheet, so that the metal sheet is squeezed into the die cavity 14 and is stamped into a "J" shape. After stamping, the stamping cylinder 6 is started again and drives the upper die 4 to move upward, thereby making the upper die 4 away from the metal sheet;

[0046] Inspection operation: start the hydraulic cylinder 11 again, the piston rod of the hydraulic cylinder 11 extends, and drives the connecting part 12 to move upward slowly, thereby driving the lower die part 9 to move upward, and the extrusion force on the outer wall of the lower die part 9 disappears, so that the lower die part 9 changes from elastic contraction deformation to elastic expansion deformation, thereby making the slit 13 of the lower die part 9 change from a closed state to an open state, and at the same time, the inner side walls of the mold cavity 14 move away from each other. When the lower die part 9 expands elastically, the upper surface of the arc wedge block 29 will press upward against the inner top wall of the annular groove 15 of the magnetic block 8, so that the magnetic block 8 moves upward relative to the lower die part 9, thereby making the magnetic block 8 press the stamped metal sheet. The middle section 1c generates an upward lifting force, thereby causing the metal sheet to move upward relative to the lower die portion 9. At this time, the middle section 1c of the metal sheet is separated from the state of contact with the bottom wall of the lower space of the die cavity 14. If the bending angle of the horizontal section 1a and the vertical section 1b of the metal sheet after stamping is 90°, the bottom surface of the horizontal section 1a is parallel to the upper end surface of the lower die portion 9 (the bottom surface of the horizontal section 1a is slightly higher than the upper end surface of the lower die portion 9), and the gap size is small (less than 0.15mm). In addition, the magnetic block 8 has a magnetic attraction to the metal sheet, so that the metal sheet is in a relatively stable state during the process of being lifted by the magnetic block 8.

[0047] When the lower die portion 9 is elastically expanded, the edge of the upper end surface of the lower die portion 9 generates a thrust on the movable baffle 20, so that the movable baffle 20 drives the driving rod 18 to move in the direction away from the lower die portion 9. When the driving rod 18 moves, the rotating gear 28 and the rack portion 25 are meshed, thereby driving the toggle rod 27 to swing, so that the toggle rod 27 abuts against the inner side wall of the notch groove 26, thereby driving the detection rod 22 to move in the direction close to the lower die portion 9, so that the feeler gauge 21 moves in the direction of the lower die portion 9, and the bottom surface of the feeler gauge 21 is flush with the upper end surface of the lower die portion 9. If the bottom surface of the horizontal section 1a is parallel to the upper end surface of the lower die portion 9, the gap between the two is small, and the feeler gauge 21 cannot be inserted into the gap. At this time, the feeler gauge 21 will be blocked by the horizontal section 1a, so that the feeler gauge 21 is in a bent state. The worker visually observes the bending of the feeler gauge 21 and then determines that the metal sheet has a high forming accuracy, and then removes the formed metal sheet from the lower die portion 9;

[0048] On the contrary, if the bending angle between the horizontal section 1a and the vertical section 1b is greater than 90°, the end edge of the horizontal section 1a away from the vertical section 1b is in a warped state. At this time, the gap between the bottom surface of the horizontal section 1a and the upper end surface of the lower mold part 9 is large, so that the feeler gauge 21 can be inserted into the gap, and it can be determined that the forming accuracy of the metal sheet is low and needs to be reworked.

[0049] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0050] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0051] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal product stamping machine, comprising a stamping base (1) and a mounting base (2) fixedly connected to the top surface of the stamping base (1), characterized in that: Also includes: A lower mold, the lower mold comprising, from top to bottom, a coaxially fixed lower mold portion (9) and a connecting portion (12), the outer diameter of the lower mold portion (9) decreasing from top to bottom, a mounting hole for mounting the connecting portion (12) is provided at the top of the mounting seat (2), a tapered hole for engaging the lower mold portion (9) is also provided at the top of the mounting seat (2), the tapered hole is coaxial with and connected to the mounting hole, the lower mold portion (9) cooperates with the tapered hole, a mold cavity (14) is provided on the top surface of the lower mold portion (9), a slit (13) extending to the circumference of the connecting portion (12) is provided at the periphery of the lower mold portion (9), and the slit (13) is connected to the mold cavity (14); An upper die (4), the upper die (4) being arranged directly above the lower die and driven to move vertically by a punching unit mounted on the mounting seat (2), so that the upper die (4) is inserted into the die cavity (14); A magnetic block (8), the magnetic block (8) being engaged in a mounting groove (30) provided on the top surface of the lower mold portion (9), the lower mold portion (9) being provided with a driving unit for driving the magnetic block (8) to move upward when the lower mold portion (9) elastically expands and deforms; A detection unit, wherein two detection units are provided and are arranged on the top surface of the mounting seat (2), and the two detection units are symmetrically arranged along the axis of the lower mold part (9).

2. The metal product stamping machine according to claim 1, characterized in that: The stamping base (1) is provided with a placement cavity extending to the mounting seat (2), a hydraulic cylinder (11) is installed in the placement cavity, and a piston rod of the hydraulic cylinder (11) passes through the mounting hole and is fixedly connected to the connecting portion (12).

3. The metal product stamping machine according to claim 1, characterized in that: The punching unit comprises a horizontal plate (7) connected to the top of the mounting seat (2) via a vertical plate, a punching cylinder (6) is vertically mounted on the top of the horizontal plate (7), a piston rod of the punching cylinder (6) is fixedly connected to a mounting block (5), and the upper die (4) is connected to the bottom surface of the mounting block (5).

4. The metal product stamping machine according to claim 1, characterized in that: The driving unit comprises a plurality of arc-shaped wedge blocks (29) fixedly connected to the inner wall of the mounting groove (30); an annular groove (15) is provided on the periphery of the magnetic block (8); the top surface of the arc-shaped wedge block (29) abuts against the upper inner wall of the annular groove (15); and an elastic abutting component for driving the magnetic block (8) to move downward is provided in the lower mold portion (9).

5. The metal product stamping machine according to claim 4, characterized in that: The elastic abutment assembly comprises a sliding rod (17) coaxially fixed to the bottom of the magnetic block (8); the sliding rod (17) slides freely in the lower mold part (9) and the connecting part (12); the lower end of the sliding rod (17) is fixedly sleeved on a limit nut (10); the connecting part (12) and the lower mold part (9) are jointly provided with an escape groove (24) for the limit nut (10) to engage; a first spring (16) is provided in the escape groove (24); the first spring (16) is sleeved around the sliding rod (17), and the two ends of the first spring (16) in the direction of elastic force respectively and elastically abut against the limit nut (10) and the inner top wall of the escape groove (24) in a one-to-one correspondence.

6. The metal product stamping machine according to claim 5, characterized in that: When the top surface of the magnetic block (8) is flush with the inner bottom wall of the mold cavity (14), the lower end surface of the sliding rod (17) abuts against the inner bottom wall of the air avoidance groove (24).

7. The metal product stamping machine according to claim 1, characterized in that: The detection unit comprises a detection block (3) connected to the mounting seat (2); a driving rod (18) is horizontally penetrated on the detection block (3); the driving rod (18) slides freely on the detection block (3); a movable baffle (20) is fixedly connected to one end of the driving rod (18) facing the lower mold part (9); a detection rod (22) is horizontally penetrated on the upper side of the detection block (3); the detection rod (22) slides freely on the detection block (3); a feeler gauge (21) is horizontally fixedly connected to one end of the detection rod (22) facing the lower mold part (9); a transmission assembly is provided on the detection block (3); the transmission assembly is used to drive the detection rod (22) to move in the opposite direction when the driving rod (18) moves horizontally.

8. The metal product stamping machine according to claim 7, characterized in that: One end of the driving rod (18) adjacent to the movable baffle (20) is sleeved with a limit ring (19), and a second spring (23) is sleeved around the driving rod (18), with the two ends of the second spring (23) in the elastic force direction elastically pressing against the limit ring (19) and the detection block (3) respectively.

9. The metal product stamping machine according to claim 7, characterized in that: The transmission assembly comprises a rotating gear (28) rotatably connected to the detection block (3); a rack portion (25) meshing with the rotating gear (28) is provided on the periphery of the driving rod (18); a toggle rod (27) is fixedly connected to the rotating gear (28); and a notch groove (26) for engaging the toggle rod (27) is provided on the periphery of the detection rod (22).

10. The metal product stamping machine according to claim 9, characterized in that: The width of the inner wall of the notch groove (26) increases from top to bottom.

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