Elastic sheet continuous punch forming equipment and process thereof

Abstract

The invention discloses an elastic piece continuous punch forming device and technology, and relates to the technical field of punching, the elastic piece continuous punch forming device comprises a control module, an alarm module, an upper die assembly and a lower die assembly, and the lower die assembly is provided with a punched hole matched with the upper die assembly; through holes are formed in the lower die assembly and correspond to the positions, below the plane of the stamped residual material belt and the plane of the stamped formed product, of the lower die assembly. The material jumping prevention assembly is arranged at the bottom of the lower die assembly, comprises a negative pressure plate, a first negative pressure cavity, a second negative pressure cavity, a first air pressure sensor, a second air pressure sensor, a sealing part, a plurality of telescopic assemblies and an on-off assembly, can prevent a material belt from driving waste materials to jump, can also perform blanking detection on punched and formed products, can also perform monitoring and alarming on jumping of the material belt, and is high in practicability. And a punch in the upper die assembly can be cleaned and cooled.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and in particular to a continuous stamping forming equipment and process for spring sheets. Background Technology

[0002] Continuous stamping (also known as progressive die or multi-station progressive die) is a highly efficient type of stamping die. It allows for multiple processes such as material feeding, punching, trimming, forming, bending, and blanking to be completed sequentially through multiple stations in a single stamping stroke, ultimately outputting finished or semi-finished products. Its core advantage is achieving "automated continuous production," and it is widely used in industries such as electronics, automobiles, and home appliances for producing small stamped parts in large batches with high precision requirements.

[0003] Continuous stamping dies are prone to scrap jumping. Existing anti-jumping methods use ejector pins inside the punch to push the scrap down during the stamping process. However, due to the heat generated by the punch and ejector pins after prolonged use, they are prone to magnetization, and scrap jumping can still occur. In addition, existing technologies also use oblique blow holes on the side wall of the die punch to blow the scrap down and prevent it from jumping. However, this method requires oblique flow holes inside the die, which increases the difficulty and cost of die manufacturing.

[0004] Therefore, it is necessary to invent a continuous stamping forming equipment and process for spring sheets to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous stamping forming equipment and process for spring sheets to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a continuous stamping forming equipment for spring sheets, comprising a control module, an alarm module, an upper die assembly and a lower die assembly, wherein the lower die assembly has punch holes that cooperate with the upper die assembly, and the lower die assembly has through holes corresponding to the residual material strip after stamping and the area below the plane of the stamped product; An anti-jumping component is placed at the bottom of the lower mold assembly. The anti-jumping component includes a negative pressure plate, which is detachably connected to the bottom of the lower mold assembly and is sealed to the bottom of the lower mold assembly. The first negative pressure chamber is located at the top of the negative pressure plate and extends through the bottom of the negative pressure plate. It is connected to the negative pressure system and the inflation system. It is located below the middle of the material strip and is connected to the punch on the lower mold assembly. The first air pressure sensor is installed inside it. The second negative pressure chamber is located inside the negative pressure plate, below the residual material strip after stamping and the stamped product, and is connected to the through hole on the lower die assembly. The side of the chamber opposite to the formed product is connected to the negative pressure system and the inflation system, and a second air pressure sensor is installed inside. The sealing part is located at the bottom of the negative pressure plate and is sealed to the bottom of the negative pressure plate; Multiple telescopic components are placed at the bottom of the sealing part, with one end hinged to the bottom of the sealing part and the other end fixedly connected to the stamping machine base; The second negative pressure chamber includes a strip negative pressure chamber located below the residual strip and a product negative pressure chamber located below the stamped product. The strip negative pressure chamber and the product negative pressure chamber are connected by a vent hole. A groove is provided on the inner side wall of the vent hole. A switching component is provided in the groove to cooperate with the sealing part and to control the opening and closing of the strip negative pressure chamber and the product negative pressure chamber.

[0007] Preferably, during the die-punching process, when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value, the control module controls the upper die assembly and the lower die assembly to open the die after a preset time.

[0008] Preferably, after feeding is completed, if the air pressure value detected by the second air pressure sensor is equal to the second negative pressure value, the alarm module will issue a "discharge failure" alarm.

[0009] Preferably, the upper mold assembly includes an upper mold base; The upper pad is placed at the bottom of the upper mold base; The punch is located at the bottom of the upper pad; The unloading plate is slidably sleeved outside the punch; Multiple guide rods are set at the four corners of the upper pad. One end of each guide rod is connected to the upper pad, and the other end is slidably connected to the unloading plate. A first elastic element is provided on the outer sleeve of each guide rod, and a limiting ring is provided at the bottom of each guide rod to prevent the unloading plate from falling.

[0010] Preferably, the lower die assembly includes a lower die base, with support portions at both ends of the bottom. After stamping, multiple first through holes that are equidistantly arranged and communicate with the second negative pressure cavity are opened below the residual material strips on both sides. A second through hole that communicates with the second negative pressure cavity is opened below the product plane of the stamped finished product. The lower mold is placed on top of the lower mold base, and its top has a connecting hole corresponding to the first through hole and the second through hole.

[0011] Preferably, it further includes an opening and closing mold guiding mechanism, which includes a guide post fixedly disposed on the top of the lower mold assembly; The second elastic element is sleeved outside the guide post; A ball bearing guide sleeve is fitted onto the top of the guide post and located on top of the second elastic element; The mating sleeve is located at the bottom of the upper mold assembly and can cooperate with the ball guide sleeve to guide the mold opening and closing.

[0012] Preferably, it further includes a strip guiding assembly, which includes a plurality of guide posts arranged in an array and abutting the edge of the strip; A limiting plate is installed at the top of the guide column to prevent the material belt from slipping off from the top.

[0013] Preferably, the on / off assembly includes a slider that slides in a sealing fit with the groove, and an elastic component is provided on its top, on which a vent hole is opened opposite to the vent hole; The anti-slip plate is detachably connected to the bottom of the negative pressure plate to prevent the slider from slipping off.

[0014] The present invention also provides a continuous stamping forming process for spring sheets, which utilizes the above-mentioned equipment for stamping and includes the following steps: Step 1: Before mold closing, control the negative pressure system to evacuate the first and second negative pressure chambers to maintain the air pressure at the first negative pressure value. Step 2: The control module controls the upper mold assembly and the lower mold assembly to close the mold. Step 3: During the die-punching process, when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value, the control module controls the upper die assembly and the lower die assembly to open the die after a preset time. Step 4: During the mold opening process, if the second air pressure sensor detects that the air pressure value is less than the first negative pressure value, the control module controls the alarm module to issue an alarm for "the residual material strip may jump due to the upper mold assembly during the stamping mold opening process"; if the second air pressure sensor detects that the air pressure value is equal to the first negative pressure value, the control module controls the inflation system to inflate the second negative pressure chamber until the air pressure value detected by the second air pressure sensor is the second negative pressure value. Step 5: Control the telescopic component to retract, causing the sealing part to tilt and discharge material. At the same time, as the sealing part moves downward, it works in conjunction with the on / off component to cut off the passage between the negative pressure chamber of the material belt and the negative pressure chamber of the product. Then, control the feeding component to feed material. Step 6: After feeding is completed, if the second air pressure sensor detects that the air pressure value is equal to the second negative pressure value, the alarm module will issue a "discharge failure" alarm. Step 7: Control the extension of the telescopic component to restore the sealing part to its original shape. At the same time, under the cooperation of the sealing part and the switching component, the negative pressure chamber of the material belt and the negative pressure chamber of the product are connected. Step 8: Repeat steps 1 through 7 above.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention, through the cooperation between the anti-jumping component and the on / off component, etc., controls the negative pressure system to evacuate the first negative pressure chamber and the second negative pressure chamber before mold closing, so that the air pressure is maintained at the first negative pressure value, which can adsorb the material strip before stamping and prevent the material strip from deviating.

[0016] 2. The present invention, through the cooperation between the anti-jumping component and the on / off component, adsorbs the waste material punched out in the punch during the stamping process, so that it quickly enters the first negative pressure chamber and prevents material jumping.

[0017] 3. Through the cooperation between the anti-jumping component and the on / off component, the present invention enables the material strip to be punched during the stamping process. After the punch enters the punch hole, the first negative pressure chamber is connected to the outside through the punch hole, thereby forming a negative pressure airflow. The airflow will carry the residual debris on the punch and near the punch hole into the first negative pressure chamber, thereby cleaning the debris on the punch and near the punch hole. At the same time, the airflow can cool the punch.

[0018] 4. Through the cooperation between the anti-jumping component and the on / off component, the present invention enables the upper mold component and the lower mold component to open the mold after a preset time when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value during the die punching process. The mold opening after the preset time can ensure that the waste material falls completely and further prevents jumping.

[0019] 5. Through the cooperation between the anti-jumping component and the on / off component, the present invention enables the control module to control the alarm module to issue an alarm that "the residual material strip may jump due to the upper mold component during the stamping mold opening process" when the second air pressure sensor detects that the air pressure value is less than the first negative pressure value during the mold opening process; the present invention can detect whether the material strip is lifted during the process of the punch being pulled out of the punch hole, so as to issue an alarm that there is a possibility of material jumping.

[0020] 6. Through the cooperation between the anti-jumping component and the on / off component, the present invention enables the alarm module to issue a "discharge failure" alarm if the second air pressure sensor detects that the air pressure value is equal to the second negative pressure value during the feeding process; it can detect the product unloading process and detect whether the product unloading is normal. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the overall structure of the upper mold assembly and the lower mold assembly of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the upper mold component of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the lower mold component of the present invention.

[0025] Figure 5 This is a schematic diagram of the lower mold structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the lower mold base structure in this invention.

[0027] Figure 7 This is a schematic diagram of the anti-material jumping component structure in this invention.

[0028] Figure 8 This is a three-dimensional cross-sectional view of the anti-material jumping component in this invention.

[0029] Figure 9 This is a cross-sectional view of the anti-material jumping component in this invention from another angle.

[0030] Figure 10 In this invention Figure 9 Enlarged schematic diagram of part A in the middle.

[0031] Figure 11 This is a schematic diagram of the material belt guide assembly structure in this invention.

[0032] In the diagram: 1. Pressing machine base; 2. Upper die assembly; 21. Upper die holder; 22. Upper backing plate; 23. Punch; 24. Stripper plate; 25. Guide rod; 26. First elastic element; 27. Limiting ring; 3. Lower die assembly; 31. Lower die holder; 32. Support part; 33. Lower die; 4. Anti-jump assembly; 41. Negative pressure plate; 42. First negative pressure chamber; 43. Second negative pressure chamber; 431. Strip negative pressure chamber; 4 32. Product negative pressure chamber; 433. Vent hole; 434. Slide groove; 44. Sealing part; 45. Telescopic component; 5. Mold opening and closing guide mechanism; 51. Guide post; 52. Second elastic element; 53. Ball bearing guide sleeve; 54. Mating sleeve; 6. Material strip guide assembly; 61. Guide post; 62. Limiting plate; 7. On / off assembly; 71. Slider; 72. Elastic component; 73. Vent hole; 74. Anti-detachment plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1 This invention provides, for example Figures 1 to 11 The continuous stamping forming equipment for spring sheets shown includes a control module, an alarm module, an upper die assembly 2 and a lower die assembly 3, and a feeding assembly. In this invention, the control module can adopt a PLC control system, which has logic operation and data processing capabilities, and can receive signals from various sensors in real time and control the actions of various execution components. The control module controls the opening and closing of the upper die assembly 2 and the lower die assembly 3 to achieve continuous stamping. The upper die assembly 2 and the lower die assembly 3 are both fixed on the stamping machine base 1. The control module is electrically connected to the alarm module.

[0035] The lower die assembly 3 has punches that mate with the upper die assembly 2. The lower die assembly 3 also has through holes below the surface of the stamped residual material strip and the stamped product. In this invention, the punches can be configured according to the shape and requirements of the spring sheet; the number of through holes below the residual material strip can be multiple, and the number of through holes below the product can be one, facilitating negative pressure on the residual material strip and the product.

[0036] The anti-jump component 4 is located at the bottom of the lower die assembly 3. It can prevent the material strip from carrying waste material and can also detect the blanking of stamped products, monitor and alarm the material strip jumping, and clean and cool the punch 23 in the upper die assembly 2. Specifically, the anti-jump component 4 is detachably connected to the bottom of the lower die assembly 3 by bolts. This installation method facilitates the maintenance and replacement of the anti-jump component 4.

[0037] The anti-jumping component 4 includes a negative pressure plate 41, which is detachably connected to the bottom of the lower mold component 3 and is sealed to the bottom of the lower mold component 3. Specifically, the bottom of the lower mold component 3 has a threaded hole, and the bottom of the negative pressure plate 41 has a bolt hole. The bolt engages with the threaded hole at the bottom of the lower mold base 31 to achieve a detachable connection. The lower mold component 3 and the negative pressure plate 41 are also provided with a sealing ring. The sealing ring is deformed by tightening the bolt to fill the gap, ensuring the sealing performance of the lower mold component 3 and the negative pressure plate 41 and preventing negative pressure leakage.

[0038] The first negative pressure chamber 42 is located at the top of the negative pressure plate 41 and extends through the bottom of the negative pressure plate 41. It is connected to the negative pressure system and the inflation system. It is located below the middle of the strip and is connected to the punch hole on the lower die assembly 3. By setting the first negative pressure chamber 42, the present invention can, firstly, adsorb the strip before punching to prevent the strip from shifting; secondly, adsorb the waste material punched out in the punch hole during the punching process, so that it quickly enters the first negative pressure chamber 42 to prevent material jumping; thirdly, after the punch 23 enters the punch hole, the negative pressure airflow formed by the first negative pressure chamber 42, the punch hole and the outside will carry the residual debris on the punch 23 and near the punch hole into the first negative pressure chamber 42, thereby cleaning the debris on the punch 23 and near the punch hole, and at the same time, the airflow can cool the punch 23.

[0039] The second negative pressure chamber 43 is located within the negative pressure plate 41, below the residual material strip after stamping and the stamped product, and is connected to the through hole on the lower die assembly 3. The side of its chamber opposite the stamped product is connected to the negative pressure system and the inflation system. Firstly, it can attract the material strip before stamping to prevent strip deviation. Secondly, during the process of the punch 23 being pulled out of the punch hole, it can detect whether the material strip is being lifted, thus triggering an alarm indicating a possible material jump. Thirdly, it can detect the feeding and unloading processes after stamping to ensure they are normal.

[0040] The first air pressure sensor is placed inside the first negative pressure chamber 42 to monitor the air pressure inside the first negative pressure chamber 42. Specifically, during the die-punching process, when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value, the control module controls the upper die assembly 2 and the lower die assembly 3 to open the die after a preset time. Opening the die after the preset time ensures that the waste material falls completely and prevents material jumping.

[0041] The second air pressure sensor is placed inside the second negative pressure chamber 43 to monitor the air pressure inside the chamber. Specifically, after feeding is completed, if the air pressure value detected by the second air pressure sensor is equal to the second negative pressure value, the alarm module will issue a "discharge failure" alarm.

[0042] The sealing part 44 is located at the bottom of the negative pressure plate 41 and is sealed to the bottom of the negative pressure plate 41. In this invention, a groove is opened at the top of the sealing part 44, and a silicone sealing gasket is placed in the groove. The silicone sealing gasket is deformed under pressure to fill the gap and ensure the sealing of the negative pressure cavity.

[0043] Multiple telescopic components 45 are placed at the bottom of the sealing part 44, with one end hinged to the bottom of the sealing part 44 and the other end fixedly connected to the stamping machine base 1. In this invention, there are four telescopic components 45, which are located at the four corners of the bottom of the sealing part 44 and are symmetrically distributed to ensure stable support.

[0044] The second negative pressure chamber 43 includes a strip negative pressure chamber 431 located below the residual strip and a product negative pressure chamber 432 located below the plane of the stamped product. The strip negative pressure chamber 431 and the product negative pressure chamber 432 are connected by a vent 433. A groove 434 is formed on the inner sidewall of the vent 433. A switching component 7 is provided in the groove 434, which cooperates with the sealing part 44 and can control the opening and closing of the strip negative pressure chamber 431 and the product negative pressure chamber 432. By providing the switching component 7, the present invention can control the opening and closing of the strip negative pressure chamber 431 and the product negative pressure chamber 432. Furthermore, a second air pressure sensor is provided in the product negative pressure chamber 432.

[0045] Specifically, the on / off assembly 7 includes a slider 71 that is in sealing and sliding cooperation with the slide groove 434, and an elastic member 72 is provided on its top, on which a vent hole 73 is provided opposite to the vent hole 433.

[0046] The anti-slip plate 74 is detachably connected to the bottom of the negative pressure plate 41 to prevent the slider 71 from slipping off. The elastic component 72 of this invention is a spring, and the bottom of the negative pressure plate 41 of this invention has a storage groove for storing the anti-slip plate 74.

[0047] Specifically, the upper mold assembly 2 includes an upper mold base 21.

[0048] The upper backing plate 22 is placed at the bottom of the upper mold base 21. By setting the upper backing plate 22, the force of the punch 23 is evenly transmitted to the upper mold base 21, thus avoiding local deformation of the upper mold base 21.

[0049] Punch 23 is located at the bottom of upper pad 22; the head shape of punch 23 is designed according to the shape requirements of spring sheet, such as round, square or other shapes.

[0050] The unloading plate 24 is slidably sleeved outside the punch 23; after stamping, the unloading plate 24 can unload the strip from the punch 23 to prevent the strip from following the punch 23 upward.

[0051] Multiple guide rods 25 are disposed at the four corners of the upper pad 22. One end of each guide rod is connected to the upper pad 22, and the other end is slidably connected to the unloading plate 24. A first elastic element 26 is provided on the outer sleeve of each guide rod, and a limiting ring 27 is provided at the bottom to prevent the unloading plate 24 from falling. By setting the guide rods 25, during the stamping process, the unloading plate 24 first comes into contact with the strip. As the upper die base 21 moves down, it pushes the guide rods 25 down. Under the guidance of the guide rods 25, the punch 23 moves down, thereby realizing the stamping.

[0052] Specifically, the lower die assembly 3 includes a lower die base 31, with support portions 32 at both ends of the bottom. After stamping, multiple first through holes are provided below the residual material strip on both sides, which are connected to the second negative pressure cavity 43. A second through hole is provided below the product plane of the stamped finished product, which is connected to the second negative pressure cavity 43. The present invention makes the adsorption force of the residual material strip uniform by providing first through holes at equal intervals on each side.

[0053] The lower mold 33 is placed on top of the lower mold base 31, and its top has a connecting hole corresponding to the first through hole and the second through hole.

[0054] It also includes a mold opening and closing guide mechanism 5, which includes a guide post 51, which is fixedly installed on the top of the lower mold assembly 3.

[0055] The second elastic element 52 is sleeved outside the guide post 51; in this invention, the second elastic element 52 is a spring.

[0056] The ball bearing guide sleeve 53 is sleeved on the top of the guide post 51 and located on the top of the second elastic member 52. The ball bearing guide sleeve 53 of the present invention uses the rolling friction of the balls to replace the sliding friction, which significantly reduces the frictional resistance and improves the guiding accuracy and service life.

[0057] The mating sleeve 54, located at the bottom of the upper die assembly 2, engages with the ball bearing guide sleeve 53 to guide the opening and closing of the die. When the die is closed, the mating sleeve 54 fits onto the top of the ball bearing guide sleeve 53. Through the rolling engagement of the balls, the upper die assembly 2 and the lower die assembly 3 are precisely aligned, ensuring that the punch 23 and the lower die 33 are accurately aligned in each stamping cycle, effectively preventing uneven wear and die damage.

[0058] It also includes a strip guide assembly 6, which comprises a plurality of guide posts 61 arranged in an array and abutting against the edge of the strip. The spacing between the guide posts 61 is designed according to the width of the strip to ensure that the guide posts 61 can abut against the two side edges of the strip, thereby providing guidance and preventing the strip from deviating during feeding.

[0059] Limiting plate 62 is located on top of guide post 61 to prevent the material belt from slipping off from the top.

[0060] In use, the press machine 1 is controlled by the control module to open and close the upper die assembly 2 and the lower die assembly 3, thereby achieving continuous stamping.

[0061] Before mold closing, the negative pressure system is connected to the first negative pressure chamber 42 and the second negative pressure chamber 43, so that the negative pressure system evacuates the first negative pressure chamber 42 and the second negative pressure chamber 43, and keeps the air pressure at the first negative pressure value. Since the first negative pressure chamber 42 and the second negative pressure chamber 43 are under negative pressure, under the action of negative pressure, the first negative pressure chamber 42 and the second negative pressure chamber 43 will adsorb the material strip to prevent the material strip from deviating.

[0062] The control module controls the upper mold assembly 2 and the lower mold assembly 3 to close the mold. During the mold closing process, the stripper plate 24 first contacts the strip. As the upper mold assembly 2 moves down, the punch 23 contacts the strip. As it continues to move down, the punch 23 punches the strip at the top of the punch hole. The punch 23 causes the scrap material to enter the punch hole. Under the negative pressure of the first negative pressure chamber 42, the scrap material in the punch hole quickly enters the first negative pressure chamber 42 to prevent material jumping. At the same time, since the strip has been punched, after the punch 23 enters the punch hole, the first negative pressure chamber 42 is connected to the outside through the punch hole, thereby forming a negative pressure airflow. The airflow will carry the residual debris on the punch 23 and near the punch hole into the first negative pressure chamber 42, realizing the cleaning of the debris on the punch 23 and near the punch hole. At the same time, the airflow can cool the punch 23.

[0063] During the die-punching process, when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value, the control module controls the upper die assembly 2 and the lower die assembly 3 to open the die after a preset time. The opening of the die after the preset time can ensure that the waste material falls completely and prevent material jumping. The preset time can be set according to actual needs.

[0064] During the mold opening process, if the second air pressure sensor detects that the air pressure value is less than the first negative pressure value, the first negative pressure value is negative, and the control module controls the alarm module to issue an alarm that "the residual material strip may jump due to wear of the punch 23 of the upper mold assembly 2 during the stamping mold opening process"; if the second air pressure sensor detects that the air pressure value is equal to the first negative pressure value, the control module controls the inflation system to inflate the second negative pressure chamber 43 until the air pressure detected by the second air pressure sensor is the second negative pressure value, the second negative pressure value is negative, and the second negative pressure value is greater than the first negative pressure value.

[0065] During the mold opening process, the telescopic components 45 on both sides are controlled to contract to different degrees, causing the sealing part 44 to tilt and achieve material discharge. As the sealing part 44 moves down, under the elastic force of the elastic component 72, the slider 71 cuts off the passage between the material strip negative pressure chamber 431 and the product negative pressure chamber 432, and then the feeding component is controlled to feed the material.

[0066] After feeding is completed, if the material strip successfully pushes the stamped product down smoothly, the second negative pressure chamber 43 will be connected to the atmosphere. At this time, the second air pressure sensor detects that the air pressure value is equal to the atmospheric pressure, which means that the material is discharged successfully. If the second air pressure sensor detects that the air pressure value is equal to the second negative pressure value, it means that the material is not discharged successfully, and the alarm module will issue a "material discharge failure" alarm. After the fault is cleared, the telescopic component 45 is controlled to extend, so that the sealing part 44 returns to its original state. At the same time, the sealing part 44 will push the slider 71 to move upward, so that the material strip negative pressure chamber 431 and the product negative pressure chamber 432 are connected. The negative pressure system is controlled to evacuate the first negative pressure chamber 42 and the second negative pressure chamber 43 to prepare for subsequent stamping. The above operation is repeated to close the mold.

[0067] Example 2 The present invention also provides a continuous stamping forming process for spring sheets, comprising the following steps: Step 1: Before mold closing, control the negative pressure system to evacuate the first negative pressure chamber 42 and the second negative pressure chamber 43 to keep the air pressure at the first negative pressure value. Step 2: The control module controls the upper mold assembly 2 and the lower mold assembly 3 to close the mold. Step 3: During the die-punching process, when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value, the control module controls the upper die assembly 2 and the lower die assembly 3 to open the die after a preset time. Step 4: During the mold opening process, if the second air pressure sensor detects that the air pressure value is less than the first negative pressure value, the control module controls the alarm module to issue an alarm for "the residual material strip may jump due to the upper mold assembly 2 during the stamping mold opening process"; if the second air pressure sensor detects that the air pressure value is equal to the first negative pressure value, the control module controls the inflation system to inflate the second negative pressure chamber 43 until the air pressure value detected by the second air pressure sensor is the second negative pressure value. Step 5: Control the telescopic component 45 to retract, causing the sealing part 44 to tilt and discharge material, thereby achieving material discharge. At the same time, as the sealing part 44 moves downward, in conjunction with the on / off component 7, the passage between the material belt negative pressure chamber 431 and the product negative pressure chamber 432 is cut off. Then, control the feeding component to feed material. Step 6: After feeding is completed, if the second air pressure sensor detects that the air pressure value is equal to the second negative pressure value, the alarm module will issue a "discharge failure" alarm. Step 7: Control the extension of the telescopic component 45 to restore the sealing part 44 to its original state. At the same time, under the cooperation of the sealing part 44 and the switching component 7, the negative pressure chamber 431 of the material belt and the negative pressure chamber 432 of the product are connected. Step 8: Repeat steps 1 through 7 above.

[0068] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous stamping forming equipment for spring sheets, comprising a control module, an alarm module, an upper die assembly, and a lower die assembly, characterized in that, The lower die assembly has punch holes that cooperate with the upper die assembly, and the lower die assembly has through holes below the corresponding stamping residual strip and the plane of the stamped product. An anti-jumping component is placed at the bottom of the lower mold assembly. The anti-jumping component includes a negative pressure plate, which is detachably connected to the bottom of the lower mold assembly and is sealed to the bottom of the lower mold assembly. The first negative pressure chamber is located at the top of the negative pressure plate and extends through the bottom of the negative pressure plate. It is connected to the negative pressure system and the inflation system. It is located below the middle of the material strip and is connected to the punch on the lower mold assembly. The first air pressure sensor is installed inside it. The second negative pressure chamber is located inside the negative pressure plate, below the residual material strip after stamping and the stamped product, and is connected to the through hole on the lower die assembly. The side of the chamber opposite to the formed product is connected to the negative pressure system and the inflation system, and a second air pressure sensor is installed inside. The sealing part is located at the bottom of the negative pressure plate and is sealed to the bottom of the negative pressure plate; Multiple telescopic components are placed at the bottom of the sealing part, with one end hinged to the bottom of the sealing part and the other end fixedly connected to the stamping machine base; The second negative pressure chamber includes a strip negative pressure chamber located below the residual strip and a product negative pressure chamber located below the stamped product. The strip negative pressure chamber and the product negative pressure chamber are connected by a vent hole. A groove is provided on the inner side wall of the vent hole. A switching component is provided in the groove to cooperate with the sealing part and to control the opening and closing of the strip negative pressure chamber and the product negative pressure chamber.

2. The continuous stamping forming equipment for spring sheets according to claim 1, characterized in that, During the die-punching process, when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value, the control module controls the upper die assembly and the lower die assembly to open the die after a preset time.

3. The continuous stamping forming equipment for spring sheets according to claim 1, characterized in that, After feeding is completed, if the air pressure value detected by the second air pressure sensor is equal to the second negative pressure value, the alarm module will issue a "discharge failure" alarm.

4. The continuous stamping forming equipment for spring sheets according to claim 1, characterized in that, The upper mold assembly includes an upper mold base; The upper pad is placed at the bottom of the upper mold base; The punch is located at the bottom of the upper pad; The unloading plate is slidably sleeved outside the punch; Multiple guide rods are set at the four corners of the upper pad. One end of each guide rod is connected to the upper pad, and the other end is slidably connected to the unloading plate. A first elastic element is provided on the outer sleeve of each guide rod, and a limiting ring is provided at the bottom of each guide rod to prevent the unloading plate from falling.

5. The continuous stamping forming equipment for spring sheets according to claim 1, characterized in that, The lower die assembly includes a lower die base, with support portions at both ends of the bottom. After stamping, multiple first through holes that are equidistantly arranged and communicate with the second negative pressure cavity are opened below the residual material strips on both sides. A second through hole that communicates with the second negative pressure cavity is opened below the product plane of the stamped finished product. The lower mold is placed on top of the lower mold base, and its top has a connecting hole corresponding to the first through hole and the second through hole.

6. The continuous stamping forming equipment for spring sheets according to claim 1, characterized in that, It also includes a mold opening and closing guide mechanism, which includes a guide post fixedly disposed on the top of the lower mold assembly; The second elastic element is sleeved outside the guide post; A ball bearing guide sleeve is fitted onto the top of the guide post and located on top of the second elastic element; The mating sleeve is located at the bottom of the upper mold assembly and can cooperate with the ball guide sleeve to guide the mold opening and closing.

7. The continuous stamping forming equipment for spring sheets according to claim 1, characterized in that, It also includes a strip guide assembly, which includes a plurality of guide posts arranged in an array and attached to the edge of the strip; A limiting plate is installed at the top of the guide column to prevent the material belt from slipping off from the top.

8. The continuous stamping forming equipment for spring sheets according to claim 1, characterized in that, The on / off assembly includes a slider that slides in a sealing fit with the groove, and has an elastic component on its top with an air guide hole opposite to the vent hole. The anti-slip plate is detachably connected to the bottom of the negative pressure plate to prevent the slider from slipping off.

9. A continuous stamping forming process for spring sheets, wherein the stamping is performed using the equipment described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Before mold closing, control the negative pressure system to evacuate the first and second negative pressure chambers to maintain the air pressure at the first negative pressure value. Step 2: The control module controls the upper mold assembly and the lower mold assembly to close the mold. Step 3: During the die-punching process, when the first air pressure sensor detects that the air pressure value is greater than the first negative pressure value, the control module controls the upper die assembly and the lower die assembly to open the die after a preset time. Step 4: During the mold opening process, if the second air pressure sensor detects that the air pressure value is less than the first negative pressure value, the control module controls the alarm module to issue an alarm for "the residual material strip may jump due to the upper mold assembly during the stamping mold opening process"; if the second air pressure sensor detects that the air pressure value is equal to the first negative pressure value, the control module controls the inflation system to inflate the second negative pressure chamber until the air pressure value detected by the second air pressure sensor is the second negative pressure value. Step 5: Control the telescopic component to retract, causing the sealing part to tilt and discharge material. At the same time, as the sealing part moves downward, it works in conjunction with the on / off component to cut off the passage between the negative pressure chamber of the material belt and the negative pressure chamber of the product. Then, control the feeding component to feed material. Step 6: After feeding is completed, if the second air pressure sensor detects that the air pressure value is equal to the second negative pressure value, the alarm module will issue a "discharge failure" alarm. Step 7: Control the extension of the telescopic component to restore the sealing part to its original shape. At the same time, under the cooperation of the sealing part and the switching component, the negative pressure chamber of the material belt and the negative pressure chamber of the product are connected. Step 8: Repeat steps 1 through 7 above.

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