Hardware flat plate shell inverted buckle punch forming die

Abstract

The invention discloses a hardware flat plate shell inverted buckle punch forming die which comprises an upper die assembly and a lower die assembly, the upper die assembly comprises an upper die seat plate, an upper die base plate, an upper die clamping plate, a material pressing plate, an upper die nitrogen spring and an upper die slotting tool, and the upper die nitrogen spring downwards pushes the material pressing plate; the lower die assembly comprises a lower die base plate, a lower die base plate, a lower die clamping plate, a lower die plate, a floating plate, a lower die nitrogen spring and a lower die core. The lower die nitrogen spring elastically pushes the floating plate upwards. The floating plate is provided with eight movable inner sliding blocks on the periphery of the lower die core in a sliding manner, the inner side of each movable inner sliding block is provided with an inner sliding block guide block, the inner sliding block guide block is provided with a guide block inclined surface, and each movable inner sliding block is provided with an inner sliding block inclined surface; the outer side of each movable inner sliding block is provided with a movable outer sliding block, and each movable outer sliding block is provided with an elastic push rod assembly and an elastic pull rod assembly. Through the structural design, the stamping die has the advantages of being novel in structural design, good in stability and reliability and high in stamping forming efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stamping forming die, in particular to a hardware flat shell inverted buckle stamping forming die. BACKGROUND

[0002] For hardware flat shell products, in order to ensure strength and texture, metal materials are generally used for preparation, and because the hardware flat shell product is large in size and the material is relatively thin, in order to increase the strength of the product, the hardware flat shell often needs to increase the inner inverted buckle structure on the product circumference (edge position) to form the neck-in inner flange.

[0003] Among them, the patent number is: ZL202223356384.X, the patent name is: a hardware flat necking stamping die, which specifically discloses the following technical scheme: a hardware flat necking stamping die, including an upper die plate and a lower die plate, the lower die plate is provided with a forming block arranged in a convex shape on the upper end, and the forming block is provided with a forming slide block on the four side ends, and the forming slide block is provided with an inverted buckle protrusion in a circular arc shape on the opposite outer side upper end corner, a forming guide block is arranged between the forming slide block and the forming block in a vertical arrangement, and the upper end of the forming guide block is provided with a guide bevel in the shape of R, the opposite outer side of the forming slide block is provided with an inclined slide block, and the opposite outer side of the inclined slide block is provided with a limiting block; the upper end of the upper die plate is provided with an upper die seat, and the upper die seat and the upper die plate are provided with an upper backing plate therebetween; the lower end of the lower die plate is provided with a lower die seat, and the lower die seat and the lower die plate are provided with a lower back plate, a lower backing plate and a lower clamping plate from bottom to top, and the upper end face of the lower clamping plate is provided with a stripping backing plate; the lower end of the forming block is provided with a forming block reset spring device arranged in a vertical arrangement.

[0004] It should be pointed out that for the above-mentioned hardware flat necking stamping die, the following defects exist, specifically: for the hardware flat shell product, the hardware flat necking stamping die cannot realize synchronous inverted buckle stamping forming of four straight edges and four corners, that is, it cannot realize one-time stamping forming of the neck-in inner flange of the hardware flat shell product. SUMMARY

[0005] The present application aims at the deficiencies of the prior art and provides a hardware flat shell inverted buckle stamping forming die, which has novel structure design, good stability and reliability, and high stamping forming efficiency.

[0006] To achieve the above-mentioned purpose, the following technical scheme is adopted.

[0007] The application discloses a hardware flat shell inverted-docking stamping forming die which comprises an upper die assembly and a lower die assembly located below the upper die assembly. The lower die assembly is provided with a lower die movable cavity vertically penetrating through the lower die plate, and a floating plate is vertically and slidably installed in the lower die movable cavity; a lower die core is screw-connected to the upper surface of the floating plate; The floating plate is horizontally and slidably provided with eight movable inner sliding blocks around the lower die core; the eight movable inner sliding blocks comprise four straight edge inner sliding blocks corresponding to the straight edges of the hardware flat shell and four corner inner sliding blocks corresponding to the corners of the hardware flat shell; the inner sides of the movable inner sliding blocks are respectively provided with vertically arranged inner sliding block guide blocks; the lower ends of the inner sliding block guide holes are respectively and fixedly installed between the lower die cushion plate and the lower die clamping plate; the upper ends of the inner sliding block guide blocks are respectively provided with guide block inclined surfaces; and the movable inner sliding blocks are respectively provided with inner sliding block inclined surfaces corresponding to the guide block inclined surfaces of the corresponding inner sliding block guide blocks. The upper surface of the lower die plate is horizontally and slidably provided with movable outer sliding blocks corresponding to the movable inner sliding blocks; the movable outer sliding blocks are respectively located outside the corresponding movable inner sliding blocks; the number of the movable outer sliding blocks is eight; the eight movable outer sliding blocks comprise four straight edge outer sliding blocks corresponding to the straight edges of the hardware flat shell and four corner outer sliding blocks corresponding to the corners of the hardware flat shell; each movable outer sliding block is respectively provided with an elastic push rod assembly; each elastic push rod assembly elastically pushes the corresponding movable inner sliding block inward; the lower die assembly is respectively provided with elastic pull rod assemblies corresponding to the movable outer sliding blocks; and each elastic pull rod assembly elastically pulls the corresponding movable outer sliding block outward. The upper die assembly further comprises a pressing plate located below the upper die clamping plate; the upper die assembly is provided with a plurality of upper nitrogen gas springs arranged at intervals above the pressing plate; the lower ends of the upper nitrogen gas springs are respectively in abutment with the upper surface of the pressing plate; and the upper die cushion plate and the upper die clamping plate are respectively and fixedly provided with upper die insert knives arranged vertically and used for pushing the corresponding movable outer sliding blocks to slide inward, corresponding to the movable outer sliding blocks; the lower ends of the upper die insert knives respectively pass through the pressing plate and extend to the lower end side of the pressing plate.

[0008] The movable outer sliding block is provided with an outer sliding block mounting hole horizontally and transversely penetrating through the movable outer sliding block corresponding to the elastic push rod assembly; the elastic push rod assembly comprises an active push rod, a push rod spring and a first screw successively arranged from inside to outside and embedded in the outer sliding block mounting hole; the first screw is screw-connected to the outer sliding block mounting hole of the movable outer sliding block; the inner end of the push rod spring is in elastic abutment with the active push rod; and the outer end of the push rod spring is in elastic abutment with the first screw. The inner wall of the outer slider installation hole is provided with an outer slider stop shoulder for preventing the movable push rod from sliding inward.

[0009] The elastic pull rod assembly includes a lower mold fixing block screwed and fastened to the lower mold plate or the lower mold clamping plate, the lower mold fixing block is provided with a fixing block through hole extending transversely therethrough, a movable pull rod is slidably inserted into the fixing block through hole, and the inner end of the movable pull rod is screwed to the movable outer slider; The outer end of the movable pull rod is provided with a pull rod shoulder, and the outer end of the movable pull rod is provided with a pull rod spring between the pull rod shoulder and the lower mold fixed block. The outer end of the pull rod spring elastically abuts against the pull rod shoulder, and the inner end of the pull rod spring abuts against the lower mold fixed block.

[0010] Wherein, the lower template is respectively equipped with outer slider blocks on the outer sides of each movable outer slider; When the inverted stamping die for the hardware flat plate shell is opened, the movable outer sliding block is limited to the outer sliding block stopper.

[0011] Among them, the floating plate is respectively provided with a vertically penetrating limiting groove corresponding to each of the movable inner sliders, and the lower end of each movable inner slider is respectively screwed and fastened with an inner slider limiting block, and each inner slider limiting block is respectively vertically limited and slidably installed in the corresponding limiting groove.

[0012] Among them, eight outer slider guide blocks are screwed on the upper surface of the lower template, and an outer slider guide groove is formed between two adjacent outer slider guide blocks; A movable outer slider is respectively installed between two adjacent outer slider guide blocks, and each movable outer slider is slidably installed in a corresponding outer slider guide groove.

[0013] The pressing plate is provided with a vertically penetrating pressing plate through hole, and a stripping assembly is embedded in the pressing plate through hole; The stripping assembly includes a second screw, a compression spring and a stripping push rod arranged in sequence from top to bottom. The second screw is screwed into the through hole of the pressure plate. The upper end of the compression spring elastically abuts against the second screw, and the lower end of the compression spring elastically abuts against the stripping push rod. The inner wall of the through hole of the pressing plate is provided with a pressing plate stop shoulder for preventing the stripping push rod from sliding downward.

[0014] The floating plate is screwed with a lower die limiting pull rod, and the lower die assembly is provided with a lower die pull rod mounting hole corresponding to the lower die limiting pull rod, which penetrates the lower die base plate, the lower die bottom plate and the lower die clamping plate, and the lower die limiting pull rod is located in the lower die pull rod mounting hole; When the inverted stamping die for the hardware flat plate shell is opened, the lower end portion of the lower die limiting pull rod is abutted against the lower pad or the lower clamping plate.

[0015] The pressing plate is screwed with an upper die limiting pull rod, and the upper die assembly is provided with an upper die pull rod mounting hole penetrating through the upper die base plate, the upper die backing plate and the upper die clamping plate, and the upper end of the upper die limiting pull rod is located in the upper die pull rod mounting hole. When the five-metal flat shell inverted buckle stamping forming die is opened, the upper end of the upper die limiting pull rod abuts against the upper die backing plate or the upper die clamping plate.

[0016] The lower die core is provided with a plurality of spaced elastic positioning needles, and the upper ends of the elastic positioning needles are respectively protruded from the upper surface of the lower die core.

[0017] Compared with the prior art, the present application has the following advantages: 1. The eight movable inner sliding blocks of the present application are composed of four straight edge inner sliding blocks and four corner inner sliding blocks, and the eight movable outer sliding blocks of the present application are composed of four straight edge outer sliding blocks and four corner outer sliding blocks. When the five-metal flat shell product is subjected to neck-in inner flanging stamping forming, the straight edge inner sliding blocks and the straight edge outer sliding blocks are matched and used for stamping forming of the neck-in inner flanging at the straight edge position of the five-metal flat shell product, and the corner inner sliding blocks and the corner outer sliding blocks are matched and used for stamping forming of the neck-in inner flanging at the corner position of the five-metal flat shell product. The present application can simultaneously perform neck-in inner flanging stamping forming on each straight edge and each corner of the five-metal flat shell product, and the stamping forming efficiency is high. 2. When the mold is closed, each movable outer sliding block is driven by the corresponding upper die insert to move inward, and each movable inner sliding block is matched with the guide block inclined surface of the inner sliding block guide block to move outward. The movable inner sliding block and the movable outer sliding block move toward the flanging position of the five-metal flat shell product and jointly act on the flanging to obtain the neck-in inner flanging structure. When the mold is opened, each movable outer sliding block is pulled by the elastic pull rod assembly to move outward, and each movable inner sliding block is pushed by the elastic push rod assembly to move inward.

[0018] 3. Therefore, the five-metal flat shell inverted buckle stamping forming die of the present application has the advantages of novel structure design, good stability and reliability, and high stamping forming efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present application.

[0020] Figure 1 Fig. 4 is a structural schematic view of the present application when the mold is opened.

[0021] Figure 2 Fig. 5 is a half-cut schematic view of the first position of the present application when the mold is opened.

[0022] Figure 3is a half sectional view of the second position of the present application when the mold is opened.

[0023] Figure 4 is a half sectional view of the third position of the present application when the mold is opened.

[0024] Figure 5 is a half sectional view of the fourth position of the present application when the mold is opened.

[0025] Figure 6 is a structural view of the present application when the mold is closed.

[0026] Figure 7 is a half sectional view of the present application when the mold is closed.

[0027] Figure 8 is a structural view of the lower mold assembly of the present application.

[0028] Figure 9 is a structural view of the lower mold assembly of the present application from another perspective.

[0029] In Figures 1 to 9 , there are included: 1 - upper mold assembly; 11 - upper mold base plate; 12 - upper mold pad plate; 13 - upper mold clamping plate; 14 - pressure plate; 14a - pressure plate through hole; 14b - pressure plate shoulder; 15 - upper mold nitrogen spring; 16 - upper mold insert; 17 - stripping assembly; 17a - second screw; 17b - compression spring; 17c - stripping push rod; 18 - upper mold limiting pull rod; 19 - upper mold pull rod mounting hole; 2 - lower mold assembly; 21 - lower mold base plate; 22 - lower mold pad plate; 23 - lower mold clamping plate; 24 - lower mold plate; 24a - lower mold movable cavity; 25 - floating plate; 25a - limiting sliding groove; 26 - lower mold core; 27 - lower mold nitrogen spring; 28 - movable inner sliding block; 28a - inner sliding block inclined surface; 29 - inner sliding block guide block; 29a - guide block inclined surface; 210 - movable outer sliding block; 210a - outer sliding block mounting hole; 210b - outer sliding block shoulder; 211 - elastic push rod assembly; 211a - movable push rod; 211b - push rod spring; 211c - first screw; 212 - elastic pull rod assembly; 212a - lower mold fixed block; 212b - fixed block through hole; 212c - movable pull rod; 212d - pull rod shoulder; 212e - pull rod spring; 213 - outer sliding block stop block; 214 - inner sliding block limiting block; 215 - outer sliding block guide block; 216 - lower mold limiting pull rod; 217 - lower mold pull rod mounting hole; 218 - elastic positioning needle; 3 - product. DETAILED DESCRIPTION

[0030] The present application will be described below in conjunction with specific embodiments.

[0031] Example one, as Figures 1 to 9As shown, a hardware flat shell reverse buckling stamping forming die comprises an upper die assembly 1, a lower die assembly 2 located below the upper die assembly 1, the upper die assembly 1 comprises an upper die seat plate 11, an upper die pad plate 12 and an upper die clamping plate 13 which are sequentially screwed from top to bottom, and the lower die assembly 2 comprises a lower die seat plate 21, a lower die pad plate 22, a lower die clamping plate 23 and a lower die plate 24 which are sequentially screwed from bottom to top.

[0032] As shown in the drawings, the lower die assembly 2 is provided with a lower die movable cavity 24a vertically penetrating through the lower die plate 24, a floating plate 25 is vertically slidably installed in the lower die movable cavity 24a, and a lower die core 26 is screwed on the upper surface of the floating plate 25. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 The lower die assembly 2 is provided with a plurality of spaced-apart lower nitrogen gas springs 27 at the lower end side of the floating plate 25, and the upper ends of the lower nitrogen gas springs 27 are respectively elastically abutted against the lower surface of the floating plate 25.

[0033] Further, as shown in the drawings, the floating plate 25 is horizontally slidably installed with eight movable inner sliding blocks 28 at the periphery of the lower die core 26, the eight movable inner sliding blocks 28 comprise four straight edge inner sliding blocks corresponding to the straight edges of the hardware flat shell and four corner inner sliding blocks corresponding to the corners of the hardware flat shell; the inner side of each movable inner sliding block 28 is respectively provided with an inner sliding block guide block 29 arranged vertically, the lower end of each inner sliding block guide hole is respectively clamped and installed between the lower die pad plate 22 and the lower die clamping plate 23, and the upper end of each inner sliding block guide block 29 is respectively provided with a guide block inclined surface 29a, and each movable inner sliding block 28 is provided with an inner sliding block inclined surface 28a corresponding to the guide block inclined surface 29a of the corresponding inner sliding block guide block 29. Figures 1 to 9 Further, as shown in the drawings, the upper surface of the lower die plate 24 is respectively horizontally slidably installed with movable outer sliding blocks 210 corresponding to each movable inner sliding block 28, each movable outer sliding block 210 is respectively located at the outer side of the corresponding movable inner sliding block 28, the number of movable outer sliding blocks 210 is eight, and the eight movable outer sliding blocks 210 comprise four straight edge outer sliding blocks corresponding to the straight edges of the hardware flat shell and four corner outer sliding blocks corresponding to the corners of the hardware flat shell; each movable outer sliding block 210 is respectively provided with an elastic push rod assembly 211, and each elastic push rod assembly 211 elastically pushes the corresponding movable inner sliding block 28 inwardly; the lower die assembly 2 is respectively provided with an elastic pull rod assembly 212 corresponding to each movable outer sliding block 210, and each elastic pull rod assembly 212 elastically pulls the corresponding movable outer sliding block 210 outwardly.

[0034] Figures 1 to 9 In addition, as shown in the drawings, the lower die assembly 2 is provided with a plurality of lower die movable cavities 24a vertically penetrating through the lower die plate 24, a plurality of floating plates 25 are vertically slidably installed in the lower die movable cavities 24a, and a plurality of lower die cores 26 are screwed on the upper surfaces of the floating plates 25.

[0035] In addition, as shown in the drawings, the lower die assembly 2 is provided with a plurality of lower die movable cavities 24a vertically penetrating through the lower die plate 24, a plurality of floating plates 25 are vertically slidably installed in the lower die movable cavities 24a, and a plurality of lower die cores 26 are screwed on the upper surfaces of the floating plates 25. Figures 1 to 7 ​As shown, the upper mold assembly 1 also includes a pressure plate 14 located below the upper mold clamping plate 13. The upper mold assembly 1 is equipped with a number of upper mold nitrogen springs 15 arranged at intervals above the pressure plate 14, and the lower end of each upper mold nitrogen spring 15 is respectively abutted against the upper surface of the pressure plate 14; between the upper mold pad 12 and the upper mold clamping plate 13, corresponding to each movable outer sliding block 210, respectively fixed with an upper mold knife 16 arranged vertically and used to push the corresponding movable outer sliding block 210 to slide inward, and the lower end of each upper mold knife 16 passes through the pressure plate 14 and extends to the lower end side of the pressure plate 14.

[0036] The following is a detailed description of the inverted stamping die for the metal flat housing of the first embodiment in conjunction with the specific working process. The specific steps include: Step a: Before stamping, the upper die assembly 1 and the lower die assembly 2 are separated and the die is in an open state. The movable outer slider 210 moves outward to its initial position under the pulling force of the elastic pull rod assembly 212. The floating plate 25 moves upward within the lower die movable cavity 24a of the lower die plate 24 under the elastic force of the lower die nitrogen spring 27. The floating plate 25 drives the lower die core 26 to move upward synchronously. Since the inner slider inclined surface 28a of the movable inner slider 28 is aligned with the guide block inclined surface 29a of the inner slider guide block 29, during this process, the movable inner slider 28 moves inward under the thrust of the elastic push rod assembly 211. Step b: Place the metal flat shell product 3 onto the lower mold core 26 , with the folded edge of the metal flat shell product 3 located outside the eight movable inner slides 28 ; Step c, start the punch press and drive the upper die assembly 1 to move downward through the punch press, and the press plate 14 first presses the hardware flat shell product 3 on the movable inner slide 28 and the lower die core 26; under the downward pressure of the press plate 14, each movable inner slide 28 and the lower die core 26 move downward, and the guide block inclined surface 29a of the inner slide guide block 29 guides and drives the corresponding movable inner slide 28 to move outward until the compression stroke of each lower die nitrogen device is completed. At this time, the folded edges around the hardware flat shell product 3 are completely in contact with each movable inner slide 28; Step d: As the punch press continues to drive the upper die assembly 1 downward, the upper die insert 16 continues to move downward synchronously, and the upper die insert 16 pushes the movable outer slider 210 inward. During this process, the movable outer slider 210 cooperates with the corresponding movable inner slider 28 to bend the corresponding folded edges of the hardware flat shell product 3 inward until the compression stroke of each upper die nitrogen spring 15 is completed. At this time, the circumference of the hardware flat shell product 3 is bent from a straight edge to a certain angle inward to obtain a shrinking inner folded edge, and the stamping is completed; Step e, after the completion of the punch forming, the punch drives the upper die assembly 1 to move upwards, the upper die seat, the upper die backing plate 12, the upper die clamp plate 13 and each upper die insert 16 move upwards synchronously, as each upper die insert 16 gradually retreats from the corresponding movable outer slide block 210, each movable outer slide block 210 moves outward to the initial position under the action of the elastic pull rod assembly 212, and then each movable outer slide block 210 retreats from the punched and formed hardware flat shell product 3; Step f, as the punch continues to drive the upper die assembly 1 to move upwards, after the upper die seat plate 11, the upper die backing plate 12, the upper die clamp plate 13 and each upper die insert 16 move to a certain height, and after the extension stroke of each upper die nitrogen spring 15 is completed, the pressure plate 14 moves upwards, at this time the floating plate 25 moves upwards in the lower die movable cavity 24a of the lower die plate 24 under the action of the elastic force of the lower die nitrogen spring 27, and the floating plate 25 drives the lower die core 26 to move upwards synchronously, in this process, the movable inner slide block 28 moves inward under the action of the elastic push rod assembly 211 and finally retreats from the neck-in inner flange position of the hardware flat shell product 3; Step g, after the mold is opened to the position, the worker takes the formed neck-in inner flange hardware flat shell product 3 from the lower die core 26.

[0037] It should be pointed out that, since the eight movable inner slide blocks 28 of the first embodiment are composed of four straight edge inner slide blocks and four corner inner slide blocks, and the eight movable outer slide blocks 210 of the first embodiment are composed of four straight edge outer slide blocks and four corner outer slide blocks; when the hardware flat shell product 3 is punched and formed with a neck-in inner flange structure, the straight edge inner slide blocks cooperate with the straight edge outer slide blocks and are used for punching and forming the neck-in inner flange at the straight edge position of the hardware flat shell product 3, and the corner inner slide blocks cooperate with the corner outer slide blocks and are used for punching and forming the neck-in inner flange at the corner position of the hardware flat shell product 3; that is, the hardware flat shell inverted buckle punch forming die of the first embodiment can simultaneously punch and form the neck-in inner flange at each straight edge and each corner of the hardware flat shell product 3, and the punch forming efficiency is high.

[0038] In the working process of the hardware flat shell inverted buckle punch forming die of the first embodiment, when the mold is closed, each movable outer slide block 210 is driven by the corresponding upper die insert 16 to move inward, each movable inner slide block 28 is matched with the guide block inclined surface 29a of the inner slide block guide block 29 through the inner slide block inclined surface 28a to move outward, and the movable inner slide block 28 and the movable outer slide block 210 move towards the flange position of the hardware flat shell product 3 and jointly act on the flange to obtain the neck-in inner flange structure. When the mold is opened, each movable outer slide block 210 is pulled by the elastic pull rod assembly 212 and moves outward, and each movable inner slide block 28 is pushed by the elastic push rod assembly 211 and moves inward.

[0039] In summary, it can be seen that, through the above structural design, the inverted stamping die for the hardware flat shell of the first embodiment has the advantages of novel structural design, good stability and reliability, and high stamping efficiency.

[0040] Example 2, as Figure 4 As shown, the difference between this embodiment 2 and embodiment 1 is that: the movable outer slider 210 is provided with an outer slider mounting hole 210a that runs horizontally through the elastic push rod assembly 211, and the elastic push rod assembly 211 includes a movable push rod 211a, a push rod spring 211b, and a first screw 211c that are embedded in the outer slider mounting hole 210a and arranged in sequence from the inside to the outside. The first screw 211c is screwed into the outer slider mounting hole 210a of the movable outer slider 210, the inner end of the push rod spring 211b elastically abuts against the movable push rod 211a, and the outer end of the push rod spring 211b elastically abuts against the first screw 211c.

[0041] The inner wall of the outer slider mounting hole 210a is provided with an outer slider stop shoulder 210b for preventing the movable push rod 211a from sliding inward.

[0042] When the elastic push rod assembly 211 pushes the movable inner slider 28 inward, the elastic force of the push rod spring 211 b drives the movable push rod 211 a to move inward, thereby causing the movable push rod 211 a to push the movable inner slider 28 inward.

[0043] Example 3, as Figures 1 to 9 As shown, the difference between this embodiment three and embodiment one is that the elastic pull rod assembly 212 includes a lower mold fixing block 212a that is screwed and fastened to the lower mold plate 24 or the lower mold clamping plate 23, and the lower mold fixing block 212a is provided with a transversely penetrating fixed block through hole 212b, and a movable pull rod 212c is slidably inserted in the fixed block through hole 212b, and the inner end of the movable pull rod 212c is screwed to the movable outer slider 210.

[0044] Among them, the outer end of the movable pull rod 212c is provided with a pull rod shoulder 212d, and the outer end of the movable pull rod 212c is equipped with a pull rod spring 212e between the pull rod shoulder 212d and the lower mold fixed block 212a, the outer end of the pull rod spring 212e is elastically abutted against the pull rod shoulder 212d, and the inner end of the pull rod spring 212e is abutted against the lower mold fixed block 212a.

[0045] When the elastic pull rod assembly 212 drives the movable outer slider 210 to move outward, the elastic force of the pull rod spring 212e acts outward on the pull rod shoulder 212d of the movable pull rod 212c, thereby causing the movable pull rod 212c to move outward relative to the lower mold fixed block 212a, and causing the movable pull rod 212c to pull the movable outer slider 210 to move outward.

[0046] Example 4, as Figure 3 The difference between the fourth embodiment and the first embodiment is that the outer slide block stopper 213 is arranged on the outer side of each movable outer slide block 210.

[0047] It should be noted that when the five-metal flat shell inverted-die stamping forming die is opened, the movable outer slide block 210 abuts against the outer slide block stopper 213.

[0048] The fifth embodiment, as shown in Figure 2 The difference between the fifth embodiment and the first embodiment is that the floating plate 25 is provided with a vertical limiting sliding slot 25a corresponding to each movable inner slide block 28, and the lower end of each movable inner slide block 28 is screwed with an inner slide block limiting block 214, and each inner slide block limiting block 214 is vertically limited and slidingly installed in the corresponding limiting sliding slot 25a.

[0049] During the horizontal movement of the movable inner slide block 28 towards or away from the floating plate 25, the inner slide block limiting block 214 of the movable inner slide block 28 moves along the corresponding limiting sliding slot 25a, and the limiting sliding slot 25a can guide the movement of the movable inner slide block 28.

[0050] The sixth embodiment, as shown in Figure 8 and Figure 9 The difference between the sixth embodiment and the first embodiment is that the upper surface of the lower die plate 24 is screwed with eight outer slide block guide blocks 215, and an outer slide block guide slot is formed between each two adjacent outer slide block guide blocks 215.

[0051] Each movable outer slide block 210 is installed between each two adjacent outer slide block guide blocks 215, and each movable outer slide block 210 is slidingly installed in the corresponding outer slide block guide slot. During the movement of each movable outer slide block 210 towards or away from the lower die plate 24, the outer slide block guide slot can guide the movement of the movable outer slide block 210.

[0052] The seventh embodiment, as shown in Figure 3 , Figure 5 and Figure 7 The difference between the seventh embodiment and the first embodiment is that the pressure plate 14 is provided with a vertical pressure plate through hole 14a, and the pressure plate through hole 14a is embedded with a material removal assembly 17.

[0053] Specifically, the material removal assembly 17 includes a second screw 17a, a compression spring 17b and a material removal push rod 17c arranged from top to bottom. The second screw 17a is screwed into the pressure plate through hole 14a, the upper end of the compression spring 17b is in elastic abutment with the second screw 17a, and the lower end of the compression spring 17b is in elastic abutment with the material removal push rod 17c.

[0054] In addition, the inner wall of the die plate through hole 14a is provided with a die plate shoulder 14b for blocking the downward sliding of the stripping push rod 17c.

[0055] When the die plate 14 retreats from the hardware flat shell product 3 during the opening of the hardware flat shell inverted buckle stamping forming die of the seventh embodiment, the elastic force of the compression spring 17b makes the stripping push rod 17c push out downward and push the hardware flat shell product 3, so as to separate the hardware flat shell product 3 from the die plate 14, thereby avoiding the upward movement of the hardware flat shell product 3 along with the die plate 14 during the opening of the die.

[0056] As shown in the eighth embodiment, Figure 3 the difference between the eighth embodiment and the first embodiment is that the floating plate 25 is screwed with a lower die limiting pull rod 216, the lower die assembly 2 is provided with a lower die pull rod mounting hole 217 penetrating the lower die base plate 21, the lower die bottom plate and the lower die clamping plate 23, and the lower die limiting pull rod 216 is located in the lower die pull rod mounting hole 217.

[0057] It should be pointed out that during the opening of the hardware flat shell inverted buckle stamping forming die, when the stretching stroke of each lower die nitrogen gas spring 27 is completed and the floating plate 25 moves up to the limit position, the lower end of the lower die limiting pull rod 216 abuts against the lower pad plate or the lower clamping plate, so as to stop the floating plate 25.

[0058] As shown in the ninth embodiment, Figure 3 and Figure 4 the difference between the ninth embodiment and the first embodiment is that the die plate 14 is screwed with an upper die limiting pull rod 18, the upper die assembly 1 is provided with an upper die pull rod mounting hole 19 penetrating the upper die base plate 11, the upper die pad plate 12 and the upper die clamping plate 13, and the upper die limiting pull rod 18 is located in the upper die pull rod mounting hole 19.

[0059] It should be pointed out that during the opening of the hardware flat shell inverted buckle stamping forming die, when the punch drives the upper die base plate 11 to move up to the moving height, the upper end of the upper die limiting pull rod 18 abuts against the upper die pad plate 12 or the upper die clamping plate 13, at this time, as the upper die base plate 11 continues to move up, the die plate 14 moves up synchronously.

[0060] As shown in the tenth embodiment, Figures 3 to 5 the difference between the tenth embodiment and the first embodiment is that the lower die core 26 is provided with a plurality of spaced elastic positioning needles 218, and the upper ends of the elastic positioning needles 218 respectively protrude from the upper surface of the lower die core 26.

[0061] When the hardware flat shell product 3 is placed on the lower mold core 26, the hardware flat shell product 3 can be positioned by the elastic positioning needle 218 on the lower mold core 26 to ensure that the hardware flat shell product 3 is accurately placed before being stamped.

[0062] The above merely illustrates the preferred embodiments of the present application, and those skilled in the art can make changes in the specific embodiments and application ranges according to the idea of the present application. The content of the description should not be understood as a limitation of the present application.

Claims

1. A metal flat shell inverted stamping die, comprising an upper die assembly (1), and a lower die assembly (2) located below the upper die assembly (1), wherein the upper die assembly (1) comprises an upper die base plate (11), an upper die pad (12), and an upper die clamping plate (13) which are screwed together in sequence from top to bottom, and the lower die assembly (2) comprises a lower die base plate (21), a lower die pad (22), a lower die clamping plate (23), and a lower die plate (24) which are screwed together in sequence from bottom to top; Its characteristics are: The lower mold assembly (2) is provided with a lower mold active cavity (24a) vertically penetrating the lower mold plate (24), a floating plate (25) is vertically slidably mounted in the lower mold active cavity (24a), and a lower mold core (26) is screwed onto the upper surface of the floating plate (25); the lower mold assembly (2) is provided with a plurality of lower mold nitrogen springs (27) arranged at intervals on the lower end side of the floating plate (25), and the upper end of each lower mold nitrogen spring (27) elastically abuts against the lower surface of the floating plate (25); The floating plate (25) is horizontally slidably mounted with eight movable inner sliders (28) on the periphery of the lower mold core (26). The eight movable inner sliders (28) include four straight-edge inner sliders corresponding to the straight edges of the hardware flat shell and four corner inner sliders corresponding to the corners of the hardware flat shell. The inner side of each movable inner slider (28) is respectively mounted with an inner slider guide block (29) arranged vertically. The lower end of each inner slider guide hole is respectively fixedly mounted between the lower mold pad (22) and the lower mold clamping plate (23). The upper end of each inner slider guide block (29) is respectively provided with a guide block inclined surface (29a). Each movable inner slider (28) is provided with an inner slider inclined surface (28a) corresponding to the guide block inclined surface (29a) of the corresponding inner slider guide block (29). The upper surface of the lower template (24) is respectively provided with a movable outer slider (210) for horizontal sliding movement corresponding to each movable inner slider (28), and each movable outer slider (210) is respectively located on the outer side of the corresponding movable inner slider (28). The number of movable outer sliders (210) is eight, and the eight movable outer sliders (210) include four straight-edge outer sliders corresponding to the straight edges of the hardware flat shell and four corner outer sliders corresponding to the corners of the hardware flat shell; each movable outer slider (210) is respectively provided with an elastic push rod assembly (211), and each elastic push rod assembly (211) elastically pushes the corresponding movable inner slider (28) inward; the lower mold assembly (2) is respectively provided with an elastic pull rod assembly (212) corresponding to each movable outer slider (210), and each elastic pull rod assembly (212) elastically pulls the corresponding movable outer slider (210) outward; The upper die assembly (1) also includes a pressing plate (14) located below the upper die clamping plate (13). The upper die assembly (1) is equipped with a plurality of upper die nitrogen springs (15) arranged at intervals above the pressing plate (14), and the lower end of each upper die nitrogen spring (15) is respectively in contact with the upper surface of the pressing plate (14); between the upper die pad (12) and the upper die clamping plate (13), corresponding to each movable outer slider (210), an upper die insert (16) is respectively fixedly installed and arranged vertically and used to push the corresponding movable outer slider (210) to slide inward, and the lower end of each upper die insert (16) passes through the pressing plate (14) and extends to the lower end side of the pressing plate (14).

2. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The movable outer slider (210) is provided with an outer slider mounting hole (210a) extending horizontally and transversely therethrough corresponding to the elastic push rod assembly (211); the elastic push rod assembly (211) comprises a movable push rod (211a), a push rod spring (211b), and a first screw (211c) which are embedded in the outer slider mounting hole (210a) and arranged in sequence from the inside to the outside; the first screw (211c) is screwed into the outer slider mounting hole (210a) of the movable outer slider (210); the inner end of the push rod spring (211b) elastically abuts against the movable push rod (211a); and the outer end of the push rod spring (211b) elastically abuts against the first screw (211c); The inner wall of the outer slider mounting hole (210a) is provided with an outer slider blocking shoulder (210b) for blocking the movable push rod (211a) from sliding inward.

3. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The elastic pull rod assembly (212) includes a lower mold fixing block (212a) screwed and fastened to the lower mold plate (24) or the lower mold clamping plate (23); the lower mold fixing block (212a) is provided with a fixing block through hole (212b) running transversely therethrough; a movable pull rod (212c) is slidably inserted into the fixing block through hole (212b); the inner end of the movable pull rod (212c) is screwed to the movable outer slider (210); The outer end of the movable pull rod (212c) is provided with a pull rod shoulder (212d), and the outer end of the movable pull rod (212c) is provided with a pull rod spring (212e) between the pull rod shoulder (212d) and the lower mold fixed block (212a), the outer end of the pull rod spring (212e) elastically abuts against the pull rod shoulder (212d), and the inner end of the pull rod spring (212e) abuts against the lower mold fixed block (212a).

4. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The lower template (24) is provided with outer slide block blocks (213) on the outer sides of each movable outer slide block (210); When the metal flat plate housing inverted stamping die is opened, the movable outer slide block (210) abuts against the outer slide block stopper (213).

5. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The floating plate (25) is provided with a vertically penetrating limiting slot (25a) corresponding to each of the movable inner sliders (28); the lower end of each movable inner slider (28) is screwed and fastened with an inner slider limiting block (214); and each inner slider limiting block (214) is vertically limited and slidably installed in the corresponding limiting slot (25a).

6. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: Eight outer slider guide blocks (215) are screwed onto the upper surface of the lower template (24), and an outer slider guide groove is formed between two adjacent outer slider guide blocks (215); A movable outer slider (210) is respectively installed between two adjacent outer slider guide blocks (215), and each movable outer slider (210) is slidably installed in a corresponding outer slider guide groove.

7. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The pressing plate (14) is provided with a pressing plate through hole (14a) running vertically therethrough, and a stripping assembly (17) is embedded in the pressing plate through hole (14a); The stripping assembly (17) includes a second screw (17a), a compression spring (17b) and a stripping push rod (17c) arranged in sequence from top to bottom, the second screw (17a) is screwed into the through hole (14a) of the pressing plate, the upper end of the compression spring (17b) elastically abuts against the second screw (17a), and the lower end of the compression spring (17b) elastically abuts against the stripping push rod (17c); The inner wall of the pressing plate through hole (14a) is provided with a pressing plate stop shoulder (14b) for preventing the stripping push rod (17c) from sliding downward.

8. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The floating plate (25) is screwed with a lower die limiting pull rod (216), and the lower die assembly (2) is provided with a lower die pull rod mounting hole (217) corresponding to the lower die limiting pull rod (216) and passing through the lower die base plate (21), the lower die bottom plate and the lower die clamping plate (23), and the lower die limiting pull rod (216) is located in the lower die pull rod mounting hole (217); When the hardware flat plate housing inverted stamping die is opened, the lower end of the lower die limiting rod (216) abuts against the lower pad or the lower clamping plate.

9. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The pressing plate (14) is screwed with an upper die limiting rod (18), and the upper die assembly (1) is provided with an upper die rod mounting hole (19) that passes through the upper die base plate (11), the upper die pad (12) and the upper die clamping plate (13), and the upper die limiting rod (18) is located in the upper die rod mounting hole (19); When the metal flat plate housing inverted stamping die is opened, the upper end of the upper die limiting rod (18) is limited against the upper die pad (12) or the upper die clamping plate (13).

10. The inverted stamping die for a metal flat housing according to claim 1, characterized in that: The lower mold core (26) is equipped with a plurality of elastic positioning pins (218) arranged at intervals, and the upper end of each elastic positioning pin (218) protrudes from the upper surface of the lower mold core (26).

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