Stamping device and method for automobile part machining

Abstract

The invention discloses a stamping device and method for automobile part machining, and relates to the technical field of automobile part machining devices.The stamping device comprises a stamping machine body, and a lower die base with a lower die is installed on a workbench of the stamping machine body; a first auxiliary demolding mechanism is arranged on the lower mold; the first auxiliary demolding mechanism comprises a first telescopic air bag, an air injection ring and a driving mechanism. By arranging the first auxiliary demolding mechanism, when a workpiece is subjected to mold closing, the driving mechanism drives the air injection ring to generate suction force to assist workpiece positioning, and therefore the forming quality of the workpiece is improved. And in the mold opening stage, the driving mechanism drives the air injection ring to blow air, uniform air thrust is formed between the workpiece and the lower mold, uniform mold opening thrust is provided for the surface of the workpiece, the deformation problem caused by uneven stress of the workpiece is effectively prevented, and then the demolding quality of the workpiece is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile spare part processing devices, and particularly relates to a stamping device and method for automobile spare part processing. Background Art

[0002] During the processing of automobile spare parts, the production of spring trays usually adopts a stamping process. This process can quickly and efficiently mass-produce spring trays that meet high standards in terms of shape, size, and performance. However, there are still some problems in the actual use of existing automobile spare part stamping devices.

[0003] For example, a stamping die for automobile parts with a publication number of CN113458255B includes a lower die base, a lower die core, an ejection frame, an ejection spring, a limit seat, a limit hole, an upper die base, a limit post, an upper die core, and a die cavity. The lower die core is fixedly installed at the center position on the outer surface of the upper end of the lower die base. The ejection frame is slidably sleeved outside the lower die core. The ejection spring is fixedly installed between the corner positions on the outer surface of the lower end of the ejection frame and the lower die base. The limit seat is fixedly installed at the corner positions on the outer surface of the upper end of the lower die base. The limit hole is opened at the upper end of the lower die base. The upper die base is arranged above the lower die base. The limit post is fixedly installed at the corner positions on the outer surface of the lower end of the upper die base.

[0004] Due to the large frictional resistance and adhesion force between the workpiece demoulding and the die cavity, when the ejection structure used in the above-mentioned automobile part stamping device is used for auxiliary demoulding, especially for thin sheet structures, the ejection structure is likely to cause problems such as scratches and deformation of the product, affecting the next-step processing. Moreover, when stamping iron plate materials, if there are impurities on the material surface, these impurities will adhere to the die surface, resulting in defects such as scratches, pits, and bumps on the surface of the stamped parts, affecting the appearance quality of the product, and thus affecting the stamping processing effect. Summary of the Invention

[0005] In order to overcome the above technical problems, the purpose of the present invention is to provide a stamping device and method for automobile spare part processing, which are used to solve the problem that the existing ejection-type auxiliary workpiece demoulding structure is likely to cause large scratches and deformation of the workpiece, thus affecting the stamping forming quality of the workpiece as mentioned in the above background art.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A stamping device for processing automobile parts, including a stamping machine main body. An upper die holder with an upper die is installed at the output end of the stamping machine main body, and a lower die holder with a lower die is installed on the working table of the stamping machine main body; a workpiece is formed between the upper die and the lower die; a first auxiliary demoulding mechanism is arranged on the lower die; the first auxiliary demoulding mechanism includes: a first telescopic airbag, a jet ring and a driving mechanism; wherein, the first telescopic airbag is arranged on the lower die holder; the jet ring is installed on the lower die, and the first telescopic airbag is communicated with the jet ring through a connecting pipe; the driving mechanism is installed on the lower die holder, and the output end of the driving mechanism is connected with the first telescopic airbag and is used for driving the first telescopic airbag to extend or compress along its axial direction; a first one-way valve is arranged on the first telescopic airbag; when the first telescopic airbag extends, it allows to drive the first one-way valve to open.

[0007] Preferably, the driving mechanism includes a connecting rod and a first telescopic tube; a plurality of circular hoops are arranged along the axial direction of the first telescopic airbag and are used for restricting the first telescopic airbag from shrinking or resetting along its radial direction; one end of the connecting rod is inserted into the first telescopic airbag and connected with the end of the first telescopic airbag, and the other end of the connecting rod is connected with the upper die; when the upper die moves away from the lower die holder, the connecting rod drives the first telescopic airbag to contract; when the upper die approaches the lower die holder, the connecting rod drives the first telescopic airbag to reset; The first telescopic tube is arranged between the first telescopic airbag and the connecting pipe, and the diameter of the first telescopic tube is smaller than that of the first telescopic airbag; when the first telescopic airbag is stressed and contracts, it drives the first telescopic tube to extend so that the first telescopic airbag and the connecting pipe remain connected.

[0008] Preferably, the driving mechanism further includes a first positioning seat, a plurality of connecting shafts and a first return spring; one ends of the plurality of connecting shafts are fixedly arranged on the upper die, and the axis of the connecting shaft is parallel to the moving direction of the upper die holder. The other ends of the plurality of connecting shafts are inserted into the first positioning seat, and the upper die and the first positioning seat are connected by the first return spring; the connecting rod is fixedly arranged on the first positioning seat.

[0009] Preferably, the first auxiliary demoulding mechanism further includes a demoulding agent spraying mechanism; the demoulding agent spraying mechanism includes a storage cylinder and a second one-way valve; the storage cylinder is arranged on the lower die holder and is used for storing the demoulding agent; the output end of the storage cylinder is connected with the connecting pipe, and the second one-way valve is arranged at the output end of the storage cylinder; when negative pressure is generated in the first telescopic airbag, it allows the second one-way valve to open so that the output end of the storage cylinder is communicated with the connecting pipe; A telescopic sleeve is sleeved on the telescopic part of the second one-way valve and is used for isolating the demoulding agent.

[0010] Preferably, a storage groove is formed inside the air jet ring. The storage groove is formed in a corrugated shape along the circumferential direction of the air jet ring. One end of the connecting pipe is inserted into the trough of the storage groove, and a plurality of spray holes are arranged at the top of the air jet ring and directly above the connecting pipe; the plurality of spray holes are communicated through the storage groove.

[0011] Preferably, the first auxiliary demolding mechanism further includes a recycling mechanism; the recycling mechanism includes a collection box and an auxiliary collection mechanism; a plurality of the collection boxes are arranged on the lower mold, and the opening of the collection box is arranged on the side wall of the lower mold; the auxiliary collection mechanism is arranged between the upper mold and the lower mold and is used to generate negative pressure in the collection box when the upper mold and the lower mold are separated, so as to suck the demolding agent and debris between the upper mold and the lower mold.

[0012] Preferably, the auxiliary collection mechanism includes a second telescopic airbag, a third one-way valve, a fourth one-way valve and a baffle; one end of the second telescopic airbag is arranged on the collection box and communicated with the inside of the collection box; the other end of the second telescopic airbag is connected to the upper mold; the third one-way valve and the fourth one-way valve are both installed on the collection box, and the installation directions of the third one-way valve and the fourth one-way valve are opposite; the baffle is rotatably connected to the inside of the collection box and is used to open or close the opening of the collection box; a torsion spring is arranged at the position where the baffle is rotatably connected to the collection box.

[0013] Preferably, a slide rail is fixedly arranged on the collection box, and a chute is formed on the upper mold; a first slider adapted to the slide rail and a second slider adapted to the chute are respectively arranged on the second telescopic airbag; the length direction of the second slider is arranged along the moving direction of the upper mold, and the length direction of the chute is perpendicular to the length direction of the second slider.

[0014] Preferably, a second auxiliary demolding mechanism is arranged on the upper mold; the second auxiliary demolding mechanism includes a second return spring and a push block; a stepped hole is formed on the upper mold, the push block is slidably connected in the stepped hole, and the second return spring is arranged in the stepped hole. When the push block loses restraint, the second return spring is allowed to drive the push block to slide and reset.

[0015] A stamping method for automobile parts processing, using the above stamping device for automobile parts processing, specifically includes the following steps: Step 1, mold closing and positioning: Drive the upper die base and the lower die base to approach through the stamping machine main body, so that the upper mold and the lower mold are closed. At this time, drive the first telescopic airbag to extend to generate negative pressure suction force. The generated suction force is transmitted to the air jet ring through the connecting pipe, so that the workpiece is sucked by the air jet ring, realizing the auxiliary positioning of the workpiece during mold closing; when the suction force generated by the extension of the first telescopic airbag is too large, allow the first one-way valve to be forced to open, so that the outside air is communicated with the inside of the first telescopic airbag; Step 2. Mold opening and separation: After the workpiece is stamped and formed, the main body of the stamping machine drives the upper die base and the lower die base to move away from each other, causing the upper die and the lower die to open. At this time, the driving mechanism drives the first telescopic airbag to reset. The internal pressure of the first telescopic airbag changes from negative pressure to positive pressure. At this time, the first one-way valve is in a closed state. At this time, the positive pressure is transmitted to the jet ring through the connecting pipe, that is, a positive pressure thrust is generated on the workpiece to assist the workpiece to separate from the lower die.

[0016] Advantages of the present invention: By setting the first auxiliary demoulding mechanism, the driving mechanism drives the first telescopic airbag to compress and extend, so as to realize the air inflation and air suction functions of the jet ring. When the workpiece is closed, the driving mechanism drives the jet ring to generate suction to assist the positioning of the workpiece, thereby improving the forming quality of the workpiece. In the mold opening stage, the driving mechanism drives the jet ring to inflate, forming a uniform air thrust between the workpiece and the lower die, providing a uniform mold opening thrust for the surface of the workpiece, effectively preventing the deformation problem caused by uneven force on the workpiece, and then improving the demoulding quality of the workpiece; By setting the demoulding agent spraying mechanism, during the alternating operation of the first telescopic airbag in compression and extension, the operation of spraying the demoulding agent on the surface of the lower die can be automatically completed. This process does not require manual or other active equipment to spray the demoulding agent, greatly simplifying the process flow. While improving the demoulding efficiency of the workpiece, it reduces the time and labor costs consumed in the additional spraying link, significantly improving the overall work efficiency; By setting the recovery mechanism, when the mold opening action is completed, the mechanism can be automatically started to accurately suck and collect the residual debris and excess demoulding agent after mold opening. In this way, the dust pollution in the production environment can be effectively reduced, and at the same time, the interference of debris and excess demoulding agent on the stamping and forming process of the workpiece is avoided, thereby significantly improving the quality of the stamping and forming of the workpiece. Description of the drawings

[0017] The present invention will be further described below with reference to the drawings.

[0018] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention; Figure 2 is the three-dimensional enlarged structure schematic diagram of the closed state of the upper die and the lower die of the present invention; Figure 3 is the three-dimensional enlarged structure schematic diagram of the partial section of the upper die base and the lower die base of the present invention; Figure 4 is the three-dimensional enlarged structure schematic diagram of the partial section of the first auxiliary demoulding mechanism of the present invention; Figure 5 is the three-dimensional enlarged structure schematic diagram of the first auxiliary demoulding mechanism of the present invention; Figure 6It is a schematic three-dimensional enlarged structure diagram of the lower mold of the present invention; Figure 7 It is a schematic three-dimensional enlarged structure diagram of the lower mold and the first auxiliary demolding mechanism of the present invention with partial sectioning; Figure 8 It is the present invention Figure 7 Schematic enlarged structure diagram of area A in; Figure 9 It is a schematic three-dimensional enlarged structure diagram of the jet ring of the present invention with partial sectioning; Figure 10 It is a schematic three-dimensional enlarged structure diagram of the recycling mechanism of the present invention with partial sectioning; Figure 11 It is the present invention Figure 10 Schematic enlarged structure diagram of area B in; Figure 12 It is a schematic three-dimensional enlarged structure diagram of the collection box of the present invention with partial sectioning; Figure 13 It is a schematic three-dimensional enlarged structure diagram of the upper mold of the present invention with partial sectioning; Figure 14 It is a flowchart of the method of the present invention.

[0019] In the figure: 1. Stamping machine main body; 2. Upper die holder; 3. Lower die holder; 4. Upper mold; 5. Lower mold; 51. Second positioning seat; 52. Positioning ring; 53. Ejector pin; 6. First auxiliary demolding mechanism; 61. First telescopic airbag; 62. Connecting pipe; 63. Jet ring; 64. Storage tank; 65. Spray hole; 66. Driving mechanism; 661. Connecting rod; 662. First positioning seat; 663. Connecting shaft; 664. First return spring; 665. First telescopic pipe; 67. Demolding agent spraying mechanism; 671. Storage cylinder; 672. Second one-way valve; 673. Telescopic sleeve; 68. Recycling mechanism; 681. Collection box; 682. Second telescopic airbag; 683. Third one-way valve; 684. Fourth one-way valve; 685. Baffle; 686. Slide rail; 687. First slider; 688. Second slider; 689. Chute; 7. Second auxiliary demolding mechanism; 71. Second return spring; 72. Pusher block; 8. Workpiece. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] Embodiment 1: Please refer to Figures 1-13 , A stamping device for processing auto parts, such asFigures 1-4 As shown, it includes a stamping machine main body 1. An upper die holder 2 with an upper die 4 is installed at the output end of the stamping machine main body 1, and a lower die holder 3 with a lower die 5 is installed on the workbench of the stamping machine main body 1. It can be understood that the stamping machine main body 1 is a prior art, such as a crank stamping machine. The workpiece 8 (such as Figure 10 shown) is formed between the upper die 4 and the lower die 5. A first auxiliary demolding mechanism 6 is arranged on the lower die 5. The first auxiliary demolding mechanism 6 includes: a first telescopic airbag 61, a jet ring 63 and a driving mechanism 66. Among them, the first telescopic airbag 61 is arranged on the lower die holder 3. The jet ring 63 is installed on the lower die 5, and the first telescopic airbag 61 is communicated with the jet ring 63 through a connecting pipe 62. The driving mechanism 66 is installed on the lower die holder 3, and the output end of the driving mechanism 66 is connected to the first telescopic airbag 61 and is used to drive the first telescopic airbag 61 to extend or compress along its axis. A first one-way valve is arranged on the first telescopic airbag 61. When the first telescopic airbag 61 extends, it is allowed to drive the first one-way valve to open. It can be understood that the first one-way valve is a prior art and is not drawn in the figure and will not be elaborated in detail.

[0022] It should be noted that first, the workpiece 8 is placed on the lower die 5. At this time, the workpiece 8 will block the top of the jet ring 63. When the stamping machine main body 1 drives the upper die holder 2 and the lower die holder 3 to approach, it drives the upper die 4 and the lower die 5 to close the die. At this time, by driving the driving mechanism 66 to extend, a negative pressure is generated in the first telescopic airbag 61, and then the negative pressure is transmitted to the jet ring 63 through the connecting pipe 62, so that the jet ring 63 generates a suction force on the workpiece 8 to realize the auxiliary positioning of the workpiece 8. When the suction force in the first telescopic airbag 61 is too large, the first one-way valve can be driven to open under force, so that the outside air enters the first telescopic airbag 61 to offset part of the negative pressure in the first telescopic airbag 61 until the upper die 4 and the lower die 5 are closed and stamped into shape. When the stamping machine main body 1 drives the upper die 4 and the lower die 5 to separate and open the die, the driving mechanism 66 is used to drive the first telescopic airbag 61 to reset, so that the negative pressure in the first telescopic airbag 61 first returns to normal pressure. As the upper die 4 and the lower die 5 continue to move away, a positive pressure is generated in the first telescopic airbag 61, and then the positive pressure is transmitted to the jet ring 63 through the connecting pipe 62, so that the jet ring 63 generates a thrust on the workpiece 8, so that the jet ring 63 bulges air into the gap between the lower die 5 and the workpiece 8, and then a relatively uniform thrust can be generated directly on the workpiece 8 and the lower die 5, so as to facilitate the pushing of the workpiece 8 from the lower die 5 to achieve the purpose of rapid demolding. Through the uniform thrust generated by the pneumatic method, the rapid demolding of the workpiece 8 is realized, the force uniformity of the workpiece 8 is improved, and the problem that the workpiece 8 is locally deformed due to excessive local force during demolding is prevented, ensuring the forming quality of the workpiece 8.

[0023] Please refer to Figures 1-7The driving mechanism 66 includes a connecting rod 661 and a first telescopic tube 665; a plurality of circular hoops are arranged on the first telescopic airbag 61 along its axial direction, and are used to limit the first telescopic airbag 61 from shrinking or resetting along its radial direction; one end of the connecting rod 661 is inserted into the first telescopic airbag 61 and connected to the end of the first telescopic airbag 61, and the other end of the connecting rod 661 is connected to the upper mold 4; when the upper mold 4 is away from the lower mold base 3, the connecting rod 661 drives the first telescopic airbag 61 to shrink; when the upper mold 4 is close to the lower mold base 3, the connecting rod 661 drives the first telescopic airbag 61 to reset; the first telescopic tube 665 is arranged between the first telescopic airbag 61 and the connecting tube 62, and the diameter of the first telescopic tube 665 is smaller than that of the first telescopic airbag 61 diameter, that is, when the first telescopic tube 665 is extended or retracted, it will not have too much impact on the air pressure in the first telescopic airbag 61; when the first telescopic airbag 61 is forced to shrink, it drives the first telescopic tube 665 to extend, so that the first telescopic airbag 61 and the connecting tube 62 maintain communication; the driving mechanism 66 also includes a first positioning seat 662, a plurality of connecting shafts 663 and a first return spring 664; one end of the plurality of connecting shafts 663 is fixed to the upper mold 4, and the axis of the connecting shaft 663 is parallel to the moving direction of the upper mold seat 2, and the other end of the plurality of connecting shafts 663 is inserted into the first positioning seat 662, and the upper mold 4 and the first positioning seat 662 are connected by the first return spring 664; the connecting rod 661 is fixed to the first positioning seat 662.

[0024] It should be noted that when the upper mold 4 and the lower mold 5 are driven to approach, the first positioning seat 662 first contacts the lower mold 5, and the workpiece 8 is clamped and positioned by the first positioning seat 662 and the lower mold 5. Then, as the upper mold 4 and the lower mold 5 continue to approach, the first return spring 664 is compressed, and the elastic force generated by the compression of the first return spring 664 pushes the connecting rod 661 to move, and the first telescopic airbag 61 is pushed to extend through the connecting rod 661, so as to achieve the purpose of driving the first telescopic airbag 61 to generate negative pressure, that is, in the process of closing the upper mold 4 and the lower mold 5, the first positioning seat 662 first cooperates with the lower mold 5 to clamp the workpiece 8, and the workpiece 8 is preliminarily positioned. When the negative pressure generated by the extension of the first telescopic airbag 61 is linked, the workpiece 8 is sucked to achieve secondary positioning, so as to improve the positioning effect of the workpiece 8 and ensure the stamping quality of the workpiece 8. When the upper mold 4 and the lower mold 5 are separated and opened, the first positioning seat 662 is driven to move, so that the first positioning seat 662 drives the connecting rod 661 to move, driving the first telescopic airbag 61 to reset first and then compress. By driving the compression of the first telescopic airbag 61, a positive pressure thrust is generated inside the first telescopic airbag 61, and then air is blown between the workpiece 8 and the lower mold 5 through the air jet ring 63 to realize the demolding of the workpiece 8; and in the process of driving the first telescopic airbag 61 to extend and compress, the force is transmitted through the first return spring 664, which can prevent the problem of damage to the first telescopic airbag 61 caused by excessive force; at the same time, the effective length between the connecting rod 661 and the first positioning seat 662 can be adjusted as needed to cooperate with workpieces 8 of different thicknesses. For example, the connecting rod 661 and the first positioning seat 662 are threadedly connected, and the effective length of the connecting rod 661 is adjusted by rotating the connecting rod 661.

[0025] Please refer to Figure 3 、 Figure 7 and Figure 10 It can be understood that the present application does not limit the specific structure and implementation manner of the lower mold 5. The following only provides a feasible technical solution; the lower mold 5 includes a second positioning seat 51, a positioning ring 52, and a top column 53 that are coaxially sleeved in sequence; both the second positioning seat 51 and the top column 53 are fixed on the lower mold base 3, the positioning ring 52 is slidably connected to the lower mold base 3 along its axial direction, and a third return spring is arranged between the positioning ring 52 and the lower mold base 3; when the positioning ring 52 loses its restriction, the third return spring is used to drive the positioning ring 52 to move and reset; when the positioning ring 52 is reset, the tops of the second positioning seat 51, the positioning ring 52, and the top column 53 are in the same plane; that is, when the upper mold 4 and the lower mold 5 are closed, the upper mold 4 pushes the positioning ring 52 to move, and through the cooperation of the second positioning seat 51 and the top column 53, the stamping and forming of the workpiece 8 are realized.

[0026] It should be noted that the air jet ring 63 is arranged on the positioning ring 52, and the top of the air jet ring 63 is in the same plane as the top of the positioning ring 52; one end of the connecting pipe 62 is connected to the air jet ring 63 through a second telescopic pipe, so that the movement of the positioning ring 52 does not affect the connection between the connecting pipe 62 and the air jet ring 63 to maintain a communication state.

[0027] Please refer to Figures 3-8, the first auxiliary demolding mechanism 6 further includes a mold release agent spraying mechanism 67; the mold release agent spraying mechanism 67 includes a storage cylinder 671 and a second one-way valve 672; the storage cylinder 671 is arranged on the lower mold base 3 and is used to store the mold release agent; the output end of the storage cylinder 671 is connected to the connecting pipe 62, and the second one-way valve 672 is arranged at the output end of the storage cylinder 671; when negative pressure is generated in the first expansion airbag 61, the second one-way valve 672 is allowed to open so that the output end of the storage cylinder 671 is communicated with the connecting pipe 62; a telescopic sleeve 673 is sleeved on the telescopic part of the second one-way valve 672 and is used to isolate the mold release agent.

[0028] It should be noted that when the upper mold 4 and the lower mold 5 are closed, negative pressure is generated in the first expansion airbag 61. As the negative pressure transmitted to the connecting pipe 62 increases, the second one-way valve 672 is driven to open at this time, so that the mold release agent in the storage cylinder 671 is introduced into the connecting pipe 62; when the first expansion airbag 61 is reset and compressed by force, the second one-way valve 672 is closed by force, and the positive pressure generated in the first expansion airbag 61 pushes the mold release agent and air in the connecting pipe 62 to be discharged from the jet ring 63. While assisting the workpiece 8 to be demolded, the space between the lower mold 5 and the workpiece 8 is filled with the mold release agent, so that when the next mold closing is carried out, the mold release agent existing between the workpiece 8 and the lower mold 5 is more conducive to the demolding of the workpiece 8, that is, there is no need to actively spray the mold release agent, improving the demolding efficiency and use convenience.

[0029] Please refer to Figures 3-9 , a storage groove 64 is formed inside the jet ring 63. The storage groove 64 is formed in a corrugated shape along the circumferential direction of the jet ring 63. One end of the connecting pipe 62 is inserted into the trough of the storage groove 64, and a plurality of spray holes 65 are arranged on the top of the jet ring 63 and are arranged directly above the connecting pipe 62; the plurality of spray holes 65 are communicated through the storage groove 64.

[0030] It should be noted that when the mold release agent enters the jet ring 63 with air, part of the mold release agent is stored in the storage groove 64 and part is sprayed out through the spray holes 65; and part of the mold release agent accumulates in the storage groove 64, so that part of the mold release agent always exists in the connecting pipe 62, thereby ensuring that mold release agent will be sprayed out in the jet ring 63 each time, ensuring the discharge amount of the mold release agent; at the same time, the storage groove 64 enables the communication between the plurality of spray holes 65, improving the uniformity of the discharge of the mold release agent.

[0031] Please refer to Figures 5-6 and Figures 11-12, the first auxiliary demolding mechanism 6 further includes a recycling mechanism 68; the recycling mechanism 68 includes a collection box 681 and an auxiliary collection mechanism; a plurality of collection boxes 681 are arranged on the lower mold 5, and the opening of the collection box 681 is arranged on the side wall of the lower mold 5; the auxiliary collection mechanism is arranged between the upper mold 4 and the lower mold 5 and is used to generate negative pressure in the collection box 681 when the upper mold 4 and the lower mold 5 are separated, so as to suck the demolding agent and debris between the upper mold 4 and the lower mold 5.

[0032] It should be noted that since the demolding agent will fly out to the outside when the workpiece 8 is completely separated from the lower mold 5, in order to reduce dust pollution, when the workpiece 8 is demolded, the recycling mechanism 68 is used to generate negative pressure in the collection box 681 by the auxiliary collection mechanism, and suction force is generated at the inlet of the collection box 681, so that it is convenient to suck and collect the excessively scattered demolding agent and impurities such as debris existing in the lower mold 5; while reducing dust pollution, the influence of the possible debris in the lower mold 5 on the forming of the workpiece 8 is reduced, and the forming quality of the workpiece 8 is improved.

[0033] Embodiment 2: The technical solution of this embodiment is different from that of Embodiment 1 in that: Please refer to Figures 11-12 , the auxiliary collection mechanism includes a second telescopic airbag 682, a third one-way valve 683, a fourth one-way valve 684 and a baffle 685; one end of the second telescopic airbag 682 is arranged on the collection box 681 and is communicated with the inside of the collection box 681; the other end of the second telescopic airbag 682 is connected to the upper mold 4; both the third one-way valve 683 and the fourth one-way valve 684 are installed on the collection box 681, and the installation directions of the third one-way valve 683 and the fourth one-way valve 684 are opposite; the baffle 685 is rotatably connected to the inside of the collection box 681 and is used to open or close the opening of the collection box 681; a torsion spring is arranged at the rotatable connection position of the baffle 685 and the collection box 681 and is used to drive the baffle 685 to rotate and reset to maintain the closure of the opening of the collection box 681; a slide rail 686 is fixedly arranged on the collection box 681, and a chute 689 is arranged on the upper mold 4; the second telescopic airbag 682 is respectively provided with a first slider 687 adapted to the slide rail 686 and a second slider 688 adapted to the chute 689; the length direction of the second slider 688 is arranged along the moving direction of the upper mold 4, and the length direction of the chute 689 is perpendicular to the length direction of the second slider 688.

[0034] It should be noted that when the upper mold 4 and the lower mold 5 are separated, since the second slider 688 is restricted within the chute 689, as the upper mold 4 and the lower mold 5 move away from each other, the second telescopic airbag 682 can be driven to elongate. It can be understood that multiple circular hoops for placing the second telescopic airbag 682 and causing its radial contraction or expansion are also provided inside the second telescopic airbag 682, so that a negative pressure is generated inside the second telescopic airbag 682, and then the negative pressure is transmitted to its opening part through the collection box 681, causing the collection box 681 to generate a suction force between the workpiece 8 and the lower mold 5. At this time, the positive pressure jet force generated by the jet ring 63 pushes the workpiece 8 and the lower mold 5 to separate, increasing the gap between the workpiece 8 and the lower mold 5. In this way, part of the mold release agent and debris existing between the workpiece 8 ejected by the jet ring 63 and the lower mold 5 are sucked into the collection box 681 for storage, realizing the collection of the mold release agent and debris; When a suction force is generated inside the collection box 681, the baffle 685 is forced to open, facilitating the suction of part of the mold release agent and debris into the collection box 681; when the suction force inside the collection box 681 is too large, to prevent all the mold release agent between the workpiece 8 and the lower mold 5 from being sucked away, the excessive suction force can drive the fourth one-way valve 684 to open at this time, enabling the collection box 681 to communicate with the outside through the fourth one-way valve 684 and reducing the suction force generated by the collection box 681; When the upper mold 4 and the lower mold 5 are closed, the second telescopic airbag 682 is driven to reset. At this time, the baffle 685 maintains the closure of the opening part of the collection box 681 under the action of the torsion spring, preventing the mold release agent and debris inside the collection box 681 from being exported. As the upper mold 4 and the lower mold 5 continue to approach, a positive pressure is generated inside the collection box 681. At this time, the third one-way valve 683 is forced to open to allow the second telescopic airbag 682 to be forced to reset, facilitating the next cycle of use.

[0035] Please refer to Figure 4 and Figure 13 As shown in, a second auxiliary demolding mechanism 7 is provided on the upper mold 4; it can be understood that the specific structure and installation method of the second auxiliary demolding mechanism 7 in this application are not limited. The following only provides a feasible technical solution; the second auxiliary demolding mechanism 7 includes a second return spring 71 and a push block 72; a stepped hole is formed on the upper mold 4, the push block 72 is slidably connected within the stepped hole, and the second return spring 71 is arranged within the stepped hole. When the push block 72 loses its restriction, the second return spring 71 is allowed to drive the push block 72 to slide and reset.

[0036] It should be noted that when the upper mold 4 and the lower mold 5 are separated, to prevent the workpiece 8 from being stuck on the upper mold 4, at this time, a continuous thrust is applied to the workpiece 8 through the push block 72, facilitating the separation of the workpiece 8 from the upper mold 4; during the process of closing the upper mold 4 and the lower mold 5 and stamping the workpiece 8 into shape, the push block 72 is allowed to move under force without affecting the normal shaping of the workpiece 8.

[0037] Please refer to Figures 1-14 , a stamping method for automotive parts processing, using the above-mentioned stamping device for automotive parts processing, specifically including the following steps: Step 1: Mold closing and positioning: Drive the upper mold base 2 and the lower mold base 3 to approach by the stamping machine main body 1, so that the upper mold 4 and the lower mold 5 are closed. At this time, drive the first telescopic airbag 61 to extend by the driving mechanism 66 to generate negative pressure suction. The generated suction is transmitted to the jet ring 63 through the connecting pipe 62, so that the workpiece 8 is sucked by the jet ring 63, realizing the auxiliary positioning of the workpiece 8 during mold closing; when the suction generated by the extension of the first telescopic airbag 61 is too large, allow the first one-way valve to be forced open, so that the outside air communicates with the inside of the first telescopic airbag 61; Step 2: Mold opening and detachment: When the workpiece 8 is stamped and formed, drive the upper mold base 2 and the lower mold base 3 to move away by the stamping machine main body 1, so that the upper mold 4 and the lower mold 5 are opened. At this time, drive the first telescopic airbag 61 to reset by the driving mechanism 66. The inside of the first telescopic airbag 61 changes from negative pressure to positive pressure. At this time, the first one-way valve is in a closed state. At this time, the positive pressure is transmitted to the jet ring 63 through the connecting pipe 62, that is, a positive pressure thrust is generated on the workpiece 8 to assist the workpiece 8 to detach from the lower mold 5.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and specific orientation structure and operation. Therefore, it cannot be understood as a limitation of the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A punching device for processing automobile parts, comprising a punching machine body (1), an upper die base (2) with an upper die (4) being installed at the output end of the punching machine body (1), and a lower die base (3) with a lower die (5) being installed on the working table of the punching machine body (1); characterized in that: The lower mold (5) is provided with a first auxiliary demoulding mechanism (6); the first auxiliary demoulding mechanism (6) comprises: A first telescopic airbag (61), wherein the first telescopic airbag (61) is arranged on the lower mold base (3); An air jet ring (63), the air jet ring (63) being mounted on the lower mold (5), the first telescopic air bag (61) being connected to the air jet ring (63) via a connecting pipe (62); and a driving mechanism (66), wherein the driving mechanism (66) is mounted on the lower die base (3), and an output end of the driving mechanism (66) is connected to the first telescopic airbag (61) and is used to drive the first telescopic airbag (61) to extend or compress along its axial direction.

2. A punching device for automobile parts processing according to claim 1, characterized in that: The driving mechanism (66) comprises a connecting rod (661) and a first telescopic tube (665); a plurality of circular hoops are arranged on the first telescopic airbag (61) along its axial direction and are used to limit the first telescopic airbag (61) from contracting or resetting along its radial direction; one end of the connecting rod (661) is plugged into the first telescopic airbag (61) and connected to the end of the first telescopic airbag (61), and the other end of the connecting rod (661) is connected to the upper mold (4); when the upper mold (4) is away from the lower mold base (3), the connecting rod (661) drives the first telescopic airbag (61) to contract; when the upper mold (4) is close to the lower mold base (3), the connecting rod (661) drives the first telescopic airbag (61) to resetting; The first telescopic tube (665) is arranged between the first telescopic airbag (61) and the connecting tube (62), and the diameter of the first telescopic tube (665) is smaller than the diameter of the first telescopic airbag (61); when the first telescopic airbag (61) is contracted by force, the first telescopic tube (665) is driven to extend, so that the first telescopic airbag (61) and the connecting tube (62) are maintained in communication.

3. A punching device for automobile parts processing according to claim 2, characterized in that: The driving mechanism (66) further comprises a first positioning seat (662), a plurality of connecting shafts (663) and a first return spring (664); one end of each of the plurality of connecting shafts (663) is fixedly mounted on the upper mould (4), and the axis of each of the connecting shafts (663) is parallel to the moving direction of the upper mould seat (2); the other ends of each of the plurality of connecting shafts (663) are plugged into the first positioning seat (662), and the upper mould (4) and the first positioning seat (662) are connected via the first return spring (664); and the connecting rod (661) is fixedly mounted on the first positioning seat (662).

4. A punching device for automobile parts processing according to claim 1, characterized in that: The first auxiliary demoulding mechanism (6) further comprises a demoulding agent spraying mechanism (67); the demoulding agent spraying mechanism (67) comprises a storage cylinder (671) and a second one-way valve (672); the storage cylinder (671) is arranged on the lower mold base (3) and is used to store the demoulding agent; the output end of the storage cylinder (671) is connected to the connecting pipe (62), and the second one-way valve (672) is arranged at the output end of the storage cylinder (671); when negative pressure is generated in the first telescopic airbag (61), the second one-way valve (672) is allowed to open, so that the output end of the storage cylinder (671) is connected to the connecting pipe (62); The telescopic portion of the second one-way valve (672) is provided with a telescopic sleeve (673) for isolating the release agent.

5. A punching device for automobile parts processing according to claim 4, characterized in that: A storage groove (64) is provided inside the jet ring (63), and the storage groove (64) is formed in a corrugated shape along the circumference of the jet ring (63). One end of the connecting pipe (62) is plugged into the trough of the storage groove (64), and a plurality of spray holes (65) are arranged at the top of the jet ring (63) and directly above the connecting pipe (62); the plurality of spray holes (65) are connected to each other through the storage groove (64).

6. A punching device for automobile parts processing according to claim 1, characterized in that: The first auxiliary demoulding mechanism (6) further comprises a recycling mechanism (68); the recycling mechanism (68) comprises a collection box (681) and an auxiliary collection mechanism; a plurality of the collection boxes (681) are arranged on the lower mold (5), and the opening of the collection box (681) is arranged on the side wall of the lower mold (5); the auxiliary collection mechanism is arranged between the upper mold (4) and the lower mold (5), and is used to generate negative pressure in the collection box (681) when the upper mold (4) and the lower mold (5) are separated, so as to absorb the demoulding agent and debris between the upper mold (4) and the lower mold (5).

7. A punching device for automobile parts processing according to claim 6, characterized in that: The auxiliary collection mechanism comprises a second telescopic airbag (682), a third one-way valve (683), a fourth one-way valve (684) and a baffle (685); one end of the second telescopic airbag (682) is arranged in the collection box (681) and is in communication with the interior of the collection box (681); the other end of the second telescopic airbag (682) is connected to the upper mold (4); the third one-way valve (683) and the fourth one-way valve (684) are both installed in the collection box (681), and the installation directions of the third one-way valve (683) and the fourth one-way valve (684) are opposite; the baffle (685) is rotatably connected in the collection box (681) and is used to open or close the opening of the collection box (681); a torsion spring is provided at the rotatably connected position between the baffle (685) and the collection box (681).

8. A punching device for automobile parts processing according to claim 7, characterized in that: The collecting box (681) is fixedly provided with a slide rail (686), and the upper mold (4) is provided with a slide groove (689); the second telescopic airbag (682) is respectively provided with a first slider (687) adapted to the slide rail (686) and a second slider (688) adapted to the slide groove (689); the length direction of the second slider (688) is arranged along the moving direction of the upper mold (4), and the length direction of the slide groove (689) is perpendicular to the length direction of the second slider (688).

9. A punching device for automobile parts processing according to claim 1, characterized in that: The upper mold (4) is provided with a second auxiliary demoulding mechanism (7); the second auxiliary demoulding mechanism (7) comprises a second reset spring (71) and a push block (72); a stepped hole is provided on the upper mold (4), the push block (72) is slidably connected in the stepped hole, and the second reset spring (71) is arranged in the stepped hole. When the push block (72) loses its restriction, the second reset spring (71) is allowed to drive the push block (72) to slide and reset.

10. A stamping method for processing automobile parts, characterized in that: The punching device for automobile parts processing according to any one of claims 1 to 9 specifically comprises the following steps: Step 1: mold closing and positioning: the upper mold base (2) and the lower mold base (3) are driven to approach each other by the punching machine body (1), thereby closing the upper mold (4) and the lower mold (5). At this time, the first telescopic airbag (61) is driven to extend by the driving mechanism (66) to generate negative pressure suction. The generated suction is transmitted to the air injection ring (63) through the connecting pipe (62), so that the workpiece (8) is subjected to the suction of the air injection ring (63), thereby realizing auxiliary positioning of the workpiece (8) when the mold is closed; Step 2: mold opening and disengagement: After the workpiece (8) is formed by stamping, the upper mold base (2) and the lower mold base (3) are driven away by the punching machine body (1), so that the upper mold (4) and the lower mold (5) are opened. At this time, the first telescopic airbag (61) is driven to reset by the driving mechanism (66), and the interior of the first telescopic airbag (61) changes from negative pressure to positive pressure. At this time, the first one-way valve is in a closed state. At this time, the positive pressure is transmitted to the jet ring (63) through the connecting pipe (62), that is, a positive pressure thrust is generated on the workpiece (8), which helps the workpiece (8) to be separated from the lower mold (5).

Images