Lens ring hole flanging device and its forming method

Abstract

The application discloses a lens ring hole flanging device and a lens ring hole forming method. The lens ring hole flanging device comprises a base, an upper die assembly and a lower die assembly. The upper die assembly is provided with a punching punch, an inner hole flanging forming punch, a profile punching punch and an outer ring flanging forming punch assembly. The punching punch is used for punching out a lens ring hole on a material belt. The inner hole flanging forming punch is used for flanging the lens ring hole. The profile punching punch is used for punching out a profile of the lens ring on the material belt. The outer ring flanging forming punch assembly is used for flanging the lens ring. The punching punch, the inner hole flanging forming punch, the profile punching punch and the outer ring flanging forming punch assembly in the upper die assembly can be used to continuously punch out the lens ring hole, flange the lens ring hole, punch out the profile of the lens ring and flange the lens ring on the material belt in sequence. The forming process is completed in one die, so that the production efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of punching and flanging mold technology, and in particular to a flanging device and forming method for lens ring holes. Background Technology

[0002] Flanging refers to the forming process of turning the edge of a hole or the outer edge of a part into a vertical straight edge under the action of a mold. Flanging can give the workpiece an appropriate shape or good rigidity. Flanging also plays a reinforcing role, or gives the workpiece a reasonable spatial shape and reduces the space occupied by the workpiece. Therefore, it is widely used in actual production.

[0003] In the flanging process of lens frames, the blanking process is usually carried out first using a mold, and then the flanging process is carried out in the next mold. The overall flanging process is relatively complicated, resulting in low production efficiency. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a flange-flanging device for lens ring holes, capable of flange-flanging lens ring holes.

[0005] The present invention also proposes a method for forming the lens ring hole of the above-mentioned lens ring hole flanging device.

[0006] According to a first aspect of the present invention, a lens aperture flanging device is provided, the lens aperture flanging device comprising:

[0007] Base;

[0008] An upper die assembly, comprising an upper die base and a stripper plate, wherein the stripper plate is movably disposed below the upper die base, and the upper die base is provided with a punching punch, an inner hole flanging punch, an outer shape cutting punch, and an outer ring flanging punch assembly, wherein the punching punch, the inner hole flanging punch, the outer shape cutting punch, and the outer ring flanging punch assembly pass through the stripper plate; and

[0009] A lower die assembly is disposed on the base and located below the upper die assembly. A movable strip can be placed on the lower template at the upper end of the lower die assembly. A stripper plate can abut against the strip. A punching punch, an inner hole flanging forming punch, an outer shape cutting punch, and an outer ring flanging forming punch assembly can descend to punch the strip. The strip is formed on the lower die assembly. The punching punch is used to punch out lens ring holes on the strip. The inner hole flanging forming punch is used to flanging the lens ring holes. The outer shape cutting punch is used to punch out the shape of the lens ring on the strip. The outer ring flanging forming punch assembly is used to flanging the lens ring.

[0010] The lens ring hole flanging device according to an embodiment of the present invention has at least the following beneficial effects: the punching punch, the inner hole flanging forming punch, the outer shape punching punch and the outer ring forming punch are integrated in the same upper mold assembly, and the feeder controlled by the servo motor continuously conveys the material strip on the lower mold assembly, so that the lens ring forming part can be continuously stamped on the material strip.

[0011] According to some embodiments of the present invention, the lower die assembly is provided with a first floating die, the first floating die being located below the inner hole flanging forming punch, the first floating die being provided with a first elastic element and a flanging extrusion insert, the end of the flanging extrusion insert being provided with a clearance hole, the clearance hole being used to avoid the end of the inner hole flanging forming punch, the end of the flanging extrusion insert being lower than the upper end face of the first floating die, and the flange of the lens ring hole after flanging being able to abut against the end of the flanging extrusion insert.

[0012] According to some embodiments of the present invention, the lower die assembly is further provided with a second floating die, the second floating die being located below the profile cutting punch, the second floating die being provided with a second elastic element and a trimming die insert, the trimming die insert being movably inserted in the second floating die, and the end of the profile cutting punch being inserted in the second floating die.

[0013] According to some embodiments of the present invention, the outer ring flanging forming punch assembly includes an outer ring flanging forming punch and a sleeve, the sleeve being sleeved on the outer ring flanging forming punch, the lower die assembly being provided with a flanging die insert, the flanging die insert being located below the outer ring flanging forming punch, and the sleeve being sleeved on the end of the flanging die insert.

[0014] According to some embodiments of the present invention, the outer ring flanging forming punch is movably disposed on the upper die base.

[0015] According to some embodiments of the present invention, the lower mold assembly is further provided with an air blowing pin, the air blowing pin is located on one side of the flanging die insert, the air blowing pin is connected to an air blowing device, and the air blowing port of the air blowing pin faces the die cavity of the flanging die insert.

[0016] According to some embodiments of the present invention, the upper die assembly is provided with a cutting punch, and the lower die assembly is further provided with a cutting insert, the cutting punch being located above the cutting insert, and the cutting punch being used to cut the strip.

[0017] According to some embodiments of the present invention, the upper mold assembly is provided with a plurality of guide posts, and the lower mold assembly is provided with a plurality of guide sleeves, wherein the guide posts can be inserted into the guide sleeves.

[0018] According to a second aspect of the present invention, a method for forming a lens ring hole is applied to a flange-flanging device for a lens ring hole as described in any of the embodiments of the first aspect above. The method for forming a lens ring hole includes the following steps:

[0019] The material strip is placed on the lower template, and the feeder moves the material strip;

[0020] The punching punch cuts out the lens ring hole on the strip;

[0021] The inner hole flanging forming punch flangs the lens ring hole;

[0022] The shape-cutting punch cuts out the shape of the lens ring hole on the strip.

[0023] The outer ring flanging forming punch assembly flanging the shape of the lens ring hole.

[0024] The lens ring hole forming method according to an embodiment of the present invention has at least the following beneficial effects: the material strip is fed onto the upper template of the lower mold assembly by a feeder controlled by a servo motor; the punching punch, the inner hole flanging forming punch, the outer shape cutting punch, and the outer ring flanging forming punch assembly in the upper mold assembly can be used to continuously and sequentially punch out lens ring holes on the material strip, flanging the lens ring holes, and punching out the outer shape of the lens ring; the flanging process and the forming process of the lens ring are completed in one mold, thereby improving production efficiency.

[0025] According to some embodiments of the present invention, the inner hole flanging forming punch further includes: the upper die assembly moving downwards, and the stripper plate punching the lens ring hole together with the inner hole forming punch.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of the flange device for the lens ring hole according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1A schematic diagram of the upper mold assembly of the lens ring hole flange device is shown;

[0030] Figure 3 for Figure 1 A schematic diagram of the lower mold assembly of the lens ring hole flanging device is shown;

[0031] Figure 4 for Figure 1 A half-sectional schematic diagram of the flange device for the lens ring hole is shown;

[0032] Figure 5 for Figure 4 A schematic diagram of the punching process of the punching punch is shown;

[0033] Figure 6 for Figure 4 The diagram shown is a flanging schematic of an inner hole flanging punch.

[0034] Figure 7 for Figure 6 The diagram shown is a partially enlarged schematic of the flange forming punch for internal hole flange forming;

[0035] Figure 8 for Figure 4 A schematic diagram showing the punching profile of the punching punch;

[0036] Figure 9 for Figure 4 The diagram shows the outer ring flanging forming punch assembly.

[0037] Figure label:

[0038] 1. Material strip; 2. Lens ring hole; 3. Flange;

[0039] Base 10;

[0040] Upper die assembly 20; Upper die base 21; Stripper plate 22; Punching punch 23; Inner hole flanging forming punch 24; Outer shape punch 25; Outer ring flanging forming punch assembly 26; Outer ring flanging forming punch 261; Sleeve 262; Edge cutting punch 27; Guide post 28;

[0041] Lower mold assembly 30; first floating die 31; flanging extrusion insert 311; clearance hole 3111; second floating die 32; trimming die insert 321; flanging die insert 33; air blowing pin 34; trimming insert 35; guide sleeve 36. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0044] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0046] Reference Figures 1 to 4 According to a first aspect embodiment of the present invention, the lens ring hole 2 flanging device includes: a base 10, an upper mold assembly 20, and a lower mold assembly 30. The upper mold assembly 20 includes an upper mold base 21 and a stripper plate 22. The stripper plate 22 is movably disposed below the upper mold base 21. The upper mold base 21 is provided with a punching punch 23, an inner hole flanging forming punch 24, an outer shape cutting punch 25, and an outer ring flanging forming punch assembly 26, which pass through the stripper plate 22. The lower mold assembly 30 is disposed on the base 10 and located below the upper mold assembly 20. The lower mold assembly 30 has a lower... A movable strip 1 can be placed on the template, and a stripper plate 22 can abut against the strip 1. A punching punch 23, an inner hole flanging forming punch 24, a shape cutting punch 25, and an outer ring flanging forming punch assembly 26 can descend to punch the strip 1. The strip 1 is formed on the lower die assembly 30. The punching punch 23 is used to punch out the lens ring hole 2 on the strip 1. The inner hole flanging forming punch 24 is used to flang the lens ring hole 2. The shape cutting punch 25 is used to punch out the shape of the lens ring on the strip 1. The outer ring flanging forming punch assembly 26 is used to flang the lens ring.

[0047] Specifically, such as Figure 4 As shown, the upper die assembly 20 can move up and down quickly via a drive device, and can quickly complete the stamping action in conjunction with the lower die assembly 30. The punching punch 23, the inner hole flanging forming punch 24, the outer shape punching punch 25, and the outer ring flanging forming punch assembly 26 in the upper die assembly 20 are arranged in sequence. The strip 1 passes through the punching punch 23, the inner hole flanging forming punch 24, the outer shape punching punch 25, and the outer ring flanging forming punch assembly 26 in sequence. When the upper die assembly 20 moves down quickly, the corresponding shapes can be continuously stamped on the strip 1, thereby completing the punching of the lens ring hole 2, the flanging of the lens ring hole 2, the punching of the outer shape of the lens ring hole 2, and the flanging of the outer shape of the lens ring hole 2 in sequence on the strip 1. The punching punch 23, the inner hole flanging forming punch 24, the outer shape punching punch 25, and the outer ring forming punch are integrated in the same upper mold assembly 20. With the help of a servo motor-controlled feeder, the material strip 1 is continuously conveyed on the lower mold assembly 30, so that the lens ring forming part can be continuously punched on the material strip 1.

[0048] Reference Figures 3 to 5 In some embodiments of the present invention, the strip 1 first passes through the punching punch 23 in the upper die assembly 20. The upper die assembly 20 moves downward and punches out the lens ring hole 2 at the position corresponding to the lower die plate on the lower die assembly 30. The waste material punched out can be discharged through the discharge hole provided in the lower die assembly 30 so that the waste material of the strip 1 at the next punching position can be discharged.

[0049] Reference Figure 4 , Figure 6 as well as Figure 7 The lower die assembly 30 is also provided with a first floating die 31. The first floating die 31 is located below the inner hole flanging forming punch 24. The first floating die 31 is provided with a first elastic element and a flanging extrusion insert 311. The end of the flanging extrusion insert 311 is provided with a clearance hole 3111. The clearance hole 3111 is used to avoid the end of the inner hole flanging forming punch 24. The end of the flanging extrusion insert 311 is lower than the upper end surface of the first floating die 31. The flange 3 after the lens ring hole 2 is flanged can abut against the end of the flanging extrusion insert 311.

[0050] Specifically, the first floating die 31 is buoyantly disposed in the lower die assembly 30 by means of a built-in first elastic element. When the upper die assembly 20 is performing downward stamping, the upper end face of the floating first floating die 31 protrudes from the upper end face of the lower die plate of the lower die assembly 30. It can be conceivable that when the upper mold assembly 20 descends, it drives the inner hole flanging forming punch 24 to descend as well. The end of the inner hole flanging forming punch 24 first abuts against the inner edge of the lens ring hole 2. As the upper mold assembly 20 continues to descend, the stripper plate 22 of the upper mold assembly 20 abuts against the upper end face of the first floating die 31 of the lower mold assembly 30. As the inner hole flanging forming punch 24 continues to descend, it can flanging the inner edge of the lens ring hole 2 downwards. At this time, due to the abutment of the upper end face of the first floating die 31, the elastic component in the upper mold assembly 20 can be squeezed, causing the moving stroke between the stripper plate 22 and the upper mold base 21 to close. As the upper mold assembly 20 continues to descend, it drives the stripper plate 22 to continue to descend and squeeze the first floating die 31. The first floating die 31 moves downward against the elastic force of the first internal elastic element, so that the upper end face of the first floating die 31 is flush with the upper end face of the lower die plate. At the same time, the stripper plate 22 extrudes the lens ring hole 2 on the strip 1, and the flanged part of the lens ring hole 2 also moves downward until the flange 3 of the lens ring hole 2 abuts against the end of the flanged extrusion insert 311 built into the first floating die 31. Together with the periphery of the inner hole flanged forming punch 24 and the inner wall of the first floating die 31, a cavity for extruding the flanged part is formed. As the upper die assembly 20 continues to move downward, an extrusion trend is formed, and a sharp corner feature is formed at the outer R corner of the flange, thereby meeting the product requirements.

[0051] It should be noted that the first elastic element can be a nitrogen spring, which can meet the requirement of a small stroke in the mold, and at the same time ensure the stability of the elastic force and the stability of the extrusion. It should also be noted that the elastic force of the first elastic element should be greater than the elastic force of the elastic element in the upper mold assembly 20, so as to achieve the purpose of the inner hole flanging forming punch 24 first flanging the lens ring hole 2, and then the stripper plate 22 cooperates with the flanging extrusion insert 311 and the lower mold plate to extrude the lens ring hole 2, so as to form the characteristic of the outer R angle of the lens ring hole 2 being a sharp angle.

[0052] After the inner hole flanging forming punch 24 completes the flanging and extrusion of the lens ring hole 2, the upper die assembly 20 moves upward. Under the elastic force of the elastic component inside, the stroke between the upper die base 21 and the stripper plate 22 is slowly expanded. The inner hole flanging forming punch 24 retracts into the upper die assembly 20 relative to the stripper plate 22, so the stripper plate 22 can push out the strip 1, preventing the strip 1 from getting stuck on the punches in the upper die assembly 20.

[0053] Reference Figure 4 as well as Figure 8In some embodiments of the present invention, the lower die assembly 30 is further provided with a second floating die 32, which is located below the outer profile punching punch 25. The second floating die 32 is provided with a second elastic member and a trimming die insert 321, which is movably inserted into the second floating die 32. The end of the outer profile punching punch 25 can be inserted into the second floating die 32.

[0054] Similarly, the second floating die 32 is buoyantly disposed in the lower die assembly 30 via the second elastic element, with its upper end face higher than the upper end face of the lower die plate. When the upper die assembly 20 descends, the outer profile punch 25 in the upper die assembly 20 first abuts against the strip 1, and then the upper die assembly 20 continues to descend, driving the outer profile punch 25 to descend. The outer profile punch 25, in conjunction with the trimming die insert 321, punches out the outer shape of the lens ring hole 2 on the strip 1. At the same time, the stripper plate 22 also presses against the upper end face of the second floating die 32, causing the second floating die 32 to descend until the strip 1 descends to the lower die plate, where it presses against the strip 1 in conjunction with the lower die plate. The outer shape of the punched lens ring hole 2 falls on the upper end face of the trimming die insert 321, and the end of the outer profile punch 25 passes through the second floating die 32.

[0055] Reference Figure 4 as well as Figure 9 In some embodiments of the present invention, the outer ring flanging forming punch assembly 26 includes an outer ring flanging forming punch 261 and a sleeve 262. The sleeve 262 is sleeved on the outer ring flanging forming punch 261. The lower die assembly 30 is provided with a flanging die insert 33. The flanging die insert 33 is located below the outer ring flanging forming punch 261. The sleeve 262 can be sleeved on the end of the flanging die insert 33.

[0056] Specifically, the upper die assembly 20 descends, driving the outer ring flanging punch assembly 26 downwards. Since the outer ring flanging punch 261 passes through the sleeve 262, and the lower end face of the sleeve 262 is lower than the lower end face of the outer ring flanging punch 261, when the outer ring flanging punch assembly 26 descends, the lower end face of the sleeve 262 first abuts against the outer edge of the lens ring. Then, the upper die assembly 20 continues to descend, and the sleeve 262 presses down on the outer edge of the lens ring. The upper die base 21 drives the outer ring flanging punch 261 downwards, abutting against the lens ring, which prevents the inside of the lens ring from arching upwards when the sleeve 262 presses the outer side of the lens ring. As the sleeve 262 descends, it cooperates with the outer side of the flanging die insert 33 to flang the outer side of the lens ring between the flanging die insert 33 and the sleeve 262, ultimately stamping the flanged part of the lens ring.

[0057] Furthermore, referring to Figure 4 as well as Figure 9The outer ring flanging forming punch 261 is movably mounted on the upper die base 21. After the stamping and flanging are completed, the upper die assembly 20 moves upward, and the sleeve 262 follows the upper die assembly 20 upward. The outer ring flanging forming punch 261 inside the sleeve 262 is movably mounted in the upper die assembly 20, so that the outer ring flanging forming punch 261 moves relative to the sleeve 262. When the sleeve 262 rises, the upper end of the outer ring flanging forming punch 261 is fixed by a fixing member (not shown in the figure) passing through the upper die base 21. When the upper die assembly 20 moves upward, the outer ring flanging forming punch 261 moves relative to the upper die assembly 20, that is, it moves within the sleeve 262. It can be understood that when the sleeve 262 moves upward, the outer ring flanging forming punch 261 remains fixed, which can push the flanged lens ring out of the sleeve 262 until the upper end of the sleeve 262 abuts against the upper end of the outer ring flanging forming punch 261, driving the outer ring flanging forming punch 261 to move upward, thereby pushing the lens ring onto the flanging die insert 33 in the lower die assembly 30.

[0058] Reference Figure 3 In some embodiments of the present invention, the lower mold assembly 30 is further provided with an air-blowing pin 34. The air-blowing pin 34 is located on one side of the flanging die insert 33 and is connected to an air-blowing device. The air-blowing port of the air-blowing pin 34 faces the cavity of the flanging die insert 33. Two air-blowing pins 34 can be provided, located on the same side of the flanging die insert 33. At the same time, the air-blowing port of the air-blowing pin 34 faces the flanging lens ring. The air-blowing device can blow the lens ring through the air-blowing pin 34 to the flanging position of the lens ring, which is convenient for the flanging formation of the next lens ring. The two air-blowing pins 34 located on the same side can ensure the stability of the material feeding and prevent the lens ring from being blown to other positions of the lower mold assembly 30, thus avoiding damage to the upper mold assembly 20 and the lower mold assembly 30 by the lens ring.

[0059] Reference Figure 2 as well as Figure 3 In some embodiments of the present invention, a cutting punch 27 is further provided in the upper mold assembly 20, and a cutting insert 35 is also provided in the lower mold assembly 30 at the position corresponding to the cutting punch 27. The cutting punch 27 is located above the cutting insert 35 and is used to cut the strip 1. When the upper mold assembly 20 moves downward, it drives the cutting punch 27 downward, which, together with the cutting insert 35, cuts off the waste portion of the strip 1 that has already been punched out to form the lens ring, facilitating the discharge of the strip 1.

[0060] Reference Figures 1 to 3 In some embodiments of the present invention, the upper die assembly 20 is provided with a plurality of guide posts 28, and the lower die assembly 30 is provided with a plurality of guide sleeves 36, wherein the guide posts 28 can be inserted into the guide sleeves 36. When the upper die assembly 20 moves downward, the guide posts 28 can be guided by the guide sleeves 36, which facilitates the precise punching of the upper die assembly 20 and improves the quality of the product.

[0061] According to a second aspect of the present invention, a method for forming a lens ring hole 2 is applied to a flanging device for a lens ring hole 2 as described in any of the embodiments of the first aspect above. The method for forming a lens ring hole 2 includes the following steps: a strip 1 is placed on a lower template, and a feeder moves the strip 1; a punching punch 23 punches out a lens ring hole 2 on the strip 1; an inner hole flanging forming punch 24 flangs the lens ring hole 2; an outer shape punching punch 25 punches out the outer shape of the lens ring hole 2 on the strip 1; and an outer ring flanging forming punch assembly 26 flangs the outer shape of the lens ring hole 2. Finally, a cutting punch 27, in conjunction with a cutting insert 35, can be used to cut the strip 1 into segments one by one, facilitating the discharge of waste material from the strip 1.

[0062] Specifically, the material strip 1 is fed onto the upper template of the upper and lower mold assembly 30 by a feeder controlled by a servo motor. Using the punching punch 23, the inner hole flanging forming punch 24, the outer shape punching punch 25, and the outer ring flanging forming punch assembly 26 in the upper mold assembly 20, the lens ring hole 2 can be punched out on the material strip 1 in sequence, the lens ring hole 2 can be flanged, and the outer shape of the lens ring can be punched out. The lens ring flanging process and the forming process are completed in one mold, thereby improving production efficiency.

[0063] In some embodiments of the present invention, the process of flanging the lens ring hole 2 by the inner hole forming punch 24 further includes: the upper die assembly 20 moving downwards, and the stripper plate 22 punching the lens ring hole 2 together with the inner hole forming punch. The upper die assembly 20 continues to move downwards, causing the stripper plate 22 to press down on the first floating die 31 in the lower die assembly 30, causing it to move downwards against the elastic force of the first elastic element. The upper end face of the first floating die 31 is flush with the upper end face of the lower die plate of the lower die assembly 30. At the same time, the strip 1 is squeezed by the stripper plate 22, causing the flange 3 of the lens ring hole 2 to abut against the top of the flanging extrusion insert 311, thereby forming a tendency to squeeze the lens ring hole 2, and thus making the outer R angle of the lens ring hole 2 a sharp angle.

[0064] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A flange-flanging device for a lens ring hole, characterized in that, include: Base; The upper mold assembly includes an upper mold base and a stripper plate. The stripper plate is movably disposed below the upper mold base. The upper mold base is provided with a punching punch, an inner hole flanging forming punch, an outer shape punching punch, and an outer ring flanging forming punch assembly. The punching punch, the inner hole flanging forming punch, the outer shape punching punch, and the outer ring flanging forming punch assembly pass through the stripper plate. as well as A lower die assembly is disposed on the base and located below the upper die assembly. A movable strip can be placed on the lower template at the upper end of the lower die assembly. A stripper plate can abut against the strip. A punching punch, an inner hole flanging forming punch, an outer shape cutting punch, and an outer ring flanging forming punch assembly can descend to punch the strip. The strip is formed on the lower die assembly. The punching punch is used to punch out a lens ring hole on the strip. The inner hole flanging forming punch is used to flanging the lens ring hole. The outer shape cutting punch is used to punch out the outer shape of the lens ring hole on the strip. The outer ring flanging forming punch assembly is used to flanging the outer shape of the lens ring hole. The lower die assembly is provided with a first floating die, which is located below the inner hole flanging forming punch. The first floating die is provided with a first elastic element and a flanging extrusion insert. The end of the flanging extrusion insert is provided with a clearance hole, which is used to avoid the end of the inner hole flanging forming punch. The end of the flanging extrusion insert is lower than the upper end face of the first floating die. The flange of the lens ring hole after flanging can abut against the end of the flanging extrusion insert. The outer ring flanging forming punch assembly includes an outer ring flanging forming punch and a sleeve. The sleeve is fitted onto the outer ring flanging forming punch. The lower die assembly is provided with a flanging die insert. The flanging die insert is located below the outer ring flanging forming punch. The sleeve can be fitted onto the end of the flanging die insert.

2. The flange-flanging device for the lens ring hole according to claim 1, characterized in that, The lower die assembly is further provided with a second floating die, which is located below the outer profile punch. The second floating die is provided with a second elastic element and a trimming die insert. The trimming die insert is movably inserted into the second floating die, and the end of the outer profile punch can be inserted into the second floating die.

3. The flange-flanging device for the lens ring hole according to claim 1, characterized in that, The outer ring flanging forming punch is movably mounted on the upper die base.

4. The flange-flanging device for the lens ring hole according to claim 1, characterized in that, The lower mold assembly is also provided with an air blowing pin, which is located on one side of the flanging die insert. The air blowing pin is connected to an air blowing device, and the air blowing port of the air blowing pin faces the die cavity of the flanging die insert.

5. The flange-flanging device for the lens ring hole according to claim 1, characterized in that, The upper die assembly is provided with a cutting punch, and the lower die assembly is also provided with a cutting insert. The cutting punch is located above the cutting insert and is used to cut the strip.

6. The flange-flanging device for the lens ring hole according to claim 1, characterized in that, The upper mold assembly is provided with a plurality of guide posts, and the lower mold assembly is provided with a plurality of guide sleeves, wherein the guide posts can be inserted into the guide sleeves.

7. A method for forming a lens ring hole, characterized in that, A flange-flanging device for a lens ring hole as described in any one of claims 1 to 6, wherein the method for forming the lens ring hole includes the following steps: The material strip is placed on the lower template, and the feeder moves the material strip; The punching punch cuts out the lens ring hole on the strip; The inner hole flanging forming punch flangs the lens ring hole; The shape-cutting punch cuts out the shape of the lens ring hole on the strip. The outer ring flanging forming punch assembly flanging the shape of the lens ring hole.

8. The method for forming a lens ring hole according to claim 7, characterized in that, The process of flanging the lens ring hole by the inner hole flanging punch also includes: the upper mold assembly moving downwards, and the stripper plate punching the lens ring hole together with the inner hole flanging punch.

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