A metal product stamping machine

Abstract

The present invention discloses a stamping and forming machine for metal products, specifically relating to the technical field of stamping devices, including a stamping base, a mounting seat, and a lower die. The lower die includes a lower die part and a connecting part. A die cavity is formed on the top surface of the lower die part, and fine slits are formed on the periphery of the lower die part; an upper die, which is driven to move vertically by a stamping unit installed on the mounting seat, so that the upper die is clamped into the die cavity; a magnetic block, which is clamped into the mounting groove formed on the top surface of the lower die part, and a driving unit is provided on the lower die part; a detection unit. By arranging the lower die part to be clamped into the tapered hole, the inner wall of the tapered hole generates a squeezing force on the lower die part, thereby causing the lower die part to undergo elastic contraction deformation, closing the fine slits, and at the same time clamping and positioning the metal sheet by the inner side wall of the die cavity. After stamping, the lower die part moves upward, causing the lower die part to expand elastically, so that the pressing force of the inner side wall of the die cavity on the metal sheet disappears, enabling the metal sheet to be discharged smoothly from the die cavity after stamping and forming.

Description

Technical Field

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

[0002] Stamping is a forming process that applies external forces to sheets, strips, tubes, profiles, etc. by a press and a die, causing plastic deformation or separation to obtain workpieces (stamped parts) with the desired shape and size. Stamping and forging both belong to plastic processing (or pressure processing), collectively called forging and pressing. The blanks for stamping are mainly hot-rolled and cold-rolled steel sheets and strips.

[0003] When stamping a metal sheet into a U-shape, it mainly relies on the upper die to extrude the metal sheet, so that the middle part of the metal sheet is extruded into the lower die to complete the stamping and forming of the metal sheet. Due to the relatively short stamping process, if the toughness of the metal sheet itself is relatively high, after stamping, elastic deformation may occur. As Figure 12 shown, the stamped metal sheet is in a U-shape, and includes horizontal segments 1a at both ends, an intermediate segment 1c in the middle, and vertical segments 1b at both ends. The bending angles of the horizontal segments 1a, the intermediate segment 1c, and the vertical segments 1b at both ends of the stamped metal sheet are all 90°. If the material of the stamped metal sheet has relatively high toughness, after stamping, the bending angle between the vertical segments 1b at both ends and the horizontal segment 1a may be greater than 90°, resulting in the horizontal segments 1a at both ends of the stamped metal sheet and the intermediate segment 1c of the metal sheet not being parallel, thereby reducing the stamping and forming accuracy. In addition, if the stamped metal sheet has relatively high toughness, the bending angle between the vertical segment 1b and the horizontal segment 1a may be greater than 90°. In this way, there is a certain extrusion force between the vertical segment 1b and the surface of the lower die, making it difficult to unload the material. Therefore, a forming device that can detect the stamping and forming accuracy of the metal sheet after stamping and is convenient for unloading is needed. 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 stamping and forming machine for metal products. The technical problem to be solved by the present invention is: in the prior art, due to the relatively high toughness of the metal sheet, after stamping and forming, the horizontal segments at both ends and the intermediate segment may not be parallel, resulting in a reduction in stamping and forming accuracy, and there is a certain extrusion force between the vertical segment and the surface of the lower die, making it difficult to unload the material. Therefore, a forming device that can detect the stamping and forming 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 stamping and forming machine for metal products, including a stamping base and a mounting seat fixedly connected to the top surface of the stamping base, further comprising:

[0007] Lower die, the lower die includes a lower die part and a connecting part which are coaxially and fixedly connected from top to bottom. The outer diameter of the lower die part decreases successively from top to bottom. An installation hole for installing the connecting part is provided at the top of the mounting seat. A tapered hole for engaging the lower die part is also provided at the top of the mounting seat. The tapered hole is coaxial with and communicates with the installation hole. The lower die part is used in cooperation with the tapered hole. A mold cavity is provided on the top surface of the lower die part. A slit extending to the periphery of the connecting part is provided on the periphery of the lower die part. The slit communicates with the mold cavity;

[0008] Upper die, the upper die is arranged directly above the lower die and is driven to move vertically by a stamping unit installed on the mounting seat, so that the upper die is inserted into the mold cavity;

[0009] Magnetic block, the magnetic block is engaged in the installation groove provided on the top surface of the lower die part. The lower die part is provided with a driving unit for driving the magnetic block to move upward when the lower die part elastically expands and deforms;

[0010] Detection unit, there are two detection units and they are arranged on the top surface of the mounting seat. The two detection units are symmetrically arranged along the axis of the lower die part.

[0011] Furthermore, an accommodation cavity extending to the mounting seat is provided on the stamping base. A hydraulic cylinder is installed in the accommodation cavity. The piston rod of the hydraulic cylinder passes through the installation hole and is fixedly connected to the connecting part.

[0012] Furthermore, the stamping unit includes a cross plate connected above the mounting seat through a vertical plate. A stamping oil cylinder is vertically installed on the top of the cross plate. The piston rod of the stamping oil cylinder is fixedly connected with a mounting block. The upper die is connected to the bottom surface of the mounting block.

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

[0014] Furthermore, the elastic abutting component includes a sliding rod coaxially and fixedly connected to the bottom of the magnetic block. The sliding rod slides freely in the lower die part and the connecting part. A limiting nut is fixedly sleeved at the lower end of the sliding rod. An avoidance groove for engaging the limiting nut is jointly provided in the connecting part and the lower die part. A first spring is provided in the avoidance groove. The first spring is wound around the sliding rod, and its two ends in the elastic force direction respectively elastically abut against the limiting nut and the inner top wall of the avoidance groove.

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

[0033] Figure 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] Figure 11 for Figure 10 A schematic cross-sectional view of the structure;

[0035] Figure 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 Figures 1 - 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 Figure 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 mold cavity 14. The upper inner bottom wall of the mold cavity 14 supports the bottom of the metal sheet. Start the hydraulic cylinder 11. When the piston rod of the hydraulic cylinder 11 shortens, the connecting part 12 will be driven to slide downward in the mounting hole. When the piston rod of the hydraulic cylinder 11 shortens, the lower die part 9 will be driven to move synchronously, so that the lower die part 9 slides in the tapered hole. The inner wall of the tapered hole generates a squeezing force along the inner side of the radial direction of the lower die part 9 on the periphery of the lower die part 9, so that the lower die part 9 changes from the elastic expansion deformation state to the elastic contraction deformation, and then the slit 13 on the periphery of the lower die part 9 will close. At the same time, the inner side walls of the mold cavity 14 divided by the slit 13 also approach each other, and then the mold cavity 14 forms a complete cavity. The inner side walls of the mold cavity 14 are processed to generate 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 layer space of the mold cavity 14, and the upper end surface of the lower die part 9 is flush with the top surface of the mounting seat 2;

[0045] Stamping operation: Start the stamping oil cylinder 6. The piston rod of the stamping oil cylinder 6 extends and drives the upper die 4 to move downward, thereby generating a downward squeezing force on the metal sheet, so that the metal sheet is extruded into the mold cavity 14 and stamped into a U-shape. After stamping, the stamping oil cylinder 6 is started again and drives the upper die 4 to move upward, so that the upper die 4 moves away from the metal sheet;

[0046] Detection operation: Then start the hydraulic cylinder 11. 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. The squeezing force on the outer wall of the lower die part 9 disappears, so that the lower die part 9 changes from the elastic contraction deformation to the elastic expansion deformation, and then the slit 13 of the lower die part 9 changes from the closed state to the open state. At the same time, the inner side walls of the mold cavity 14 move away from each other. When the lower die part 9 elastically expands, the upper surface of the arc-shaped wedge block 29 will abut against the inner top wall of the annular groove 15 of the magnetic block 8 upward, so that the magnetic block 8 moves upward relative to the lower die part 9, and then the magnetic block 8 generates an upward jacking force on the middle section 1c of the stamped metal sheet, so that the metal sheet moves upward relative to the lower die part 9. At this time, the middle section 1c of the metal sheet is separated from the state of abutting against the inner bottom wall of the lower layer space of the mold cavity 14. If the bending angle between the horizontal section 1a and the vertical section 1b of the metal sheet after stamping is 90°, at this time, the bottom surface of the horizontal section 1a is parallel to the upper end surface of the lower die part 9 (the bottom surface of the horizontal section 1a is slightly higher than the upper end surface of the lower die part 9), and the gap size is small (less than 0.15 mm). In addition, the magnetic block 8 has a magnetic attraction force on the metal sheet, so that the metal sheet is in a relatively stable state during the process of being jacked up 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 stamping forming machine for metal products, comprising a stamping base (1) and a mounting seat (2) fixedly connected to the top surface of the stamping base (1), characterized in that, Further comprising: A lower die, the lower die successively includes a lower die part (9) and a connecting part (12) which are coaxially fixed from top to bottom. The outer diameter of the lower die part (9) decreases successively from top to bottom. The top of the mounting seat (2) is provided with a mounting hole for mounting the connecting part (12). The top of the mounting seat (2) is also provided with a tapered hole for engaging the lower die part (9). The tapered hole is coaxial and communicated with the mounting hole. The lower die part (9) is used in cooperation with the tapered hole. A die cavity (14) is provided on the top surface of the lower die part (9). A slit (13) extending to the periphery of the connecting part (12) is provided on the periphery of the lower die part (9). The slit (13) communicates with the die cavity (14). An upper die (4), the upper die (4) is arranged directly above the lower die and is driven to move vertically by a stamping unit mounted on the mounting seat (2) so that the upper die (4) is engaged in the die cavity (14). A magnetic block (8), the magnetic block (8) is engaged in a mounting groove (30) provided on the top surface of the lower die part (9). The lower die part (9) is provided with a driving unit for driving the magnetic block (8) to move upward when the lower die part (9) elastically expands and deforms. A detection unit, there are two detection units and they are arranged on the top surface of the mounting seat (2). The two detection units are symmetrically arranged along the axis of the lower die 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. The piston rod of the hydraulic cylinder (11) passes through the mounting hole and is fixedly connected to the connecting part (12).

3. The metal product stamping machine according to claim 1, characterized in that, The stamping unit includes a cross plate (7) connected above the mounting seat (2) through a vertical plate. A stamping oil cylinder (6) is vertically installed on the top of the cross plate (7). The piston rod of the stamping oil cylinder (6) is fixedly connected with a mounting block (5). 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 includes a plurality of arc-shaped wedges (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 (29) abuts against the upper inner wall of the annular groove (15). An elastic abutting component for driving the magnetic block (8) to move downward is provided in the lower die part (9).

5. The metal product stamping machine according to claim 4, wherein, The elastic abutting component includes a sliding rod (17) coaxially and fixedly connected to the bottom of the magnetic block (8). The sliding rod (17) freely slides in the lower die part (9) and the connecting part (12). A limiting nut (10) is fixedly sleeved on the lower end of the sliding rod (17). An avoidance groove (24) for engaging the limiting nut (10) is jointly provided in the connecting part (12) and the lower die part (9). A first spring (16) is provided in the avoidance groove (24). The first spring (16) is wound around the sliding rod (17), and the two ends in the direction of its elastic force respectively elastically abut against the limiting nut (10) and the inner top wall of the avoidance groove (24).

6. The metal product stamping machine according to claim 5, wherein, 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, wherein, 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, wherein, 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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