stamping dies

Abstract

This invention discloses a blanking die, relating to the field of stamping die technology. In the blanking die, a blank holder core is fixed to the middle of the upper die base, and a punch and die ring is located outside the blank holder core and can move vertically relative to the upper die base. An insert ring is located outside the punch and die, with its lower end protruding from the blank holder core to form a blanking portion. The punch corresponds to the blank holder core, and the die is fixed to the lower die base. A floating top platform is located between the punch and die and has a vertical floating stroke. During the floating stroke of the floating top platform, it has a first position flush with the punch and die and a second position lower than the punch and die. An air blowing assembly is used to blow air after the lower and upper die assemblies open. Because there is a height difference between the scrap and the finished part after stamping, the air blowing assembly works after the blanking die opens, which can blow away the scrap and also blow away the finished part after it floats up. The product has high stability and fast production speed.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and particularly to blanking dies. Background Technology

[0002] For the processing of metal parts, especially those with small thicknesses, the traditional processing method is generally a combination of cutting and thickness grinding, such as laser cutting followed by thickness grinding. Some traditional processes also include wire cutting. However, this combination of cutting and grinding is complex, time-consuming, costly, and results in a low product yield. Summary of the Invention

[0003] The main objective of this invention is to propose a punching die that combines die punching and an air blowing system in the product forming process, resulting in high product processing stability, high yield, and fast production speed.

[0004] To achieve the above objectives, the present invention provides a blanking die, comprising:

[0005] The upper die assembly includes an upper die base, an insert, a punch and a die, and a blank holder core. The blank holder core is fixed to the middle of the upper die base. The punch and die are arranged in a ring around the outside of the blank holder core and can move in the vertical direction relative to the upper die base. The insert is arranged in a ring, fixed to the upper die base, and arranged around the outside of the punch and die. The lower end of the insert protrudes from the blank holder core to form a punching portion.

[0006] The lower die assembly, located below the upper die assembly, includes a lower die base, a punch, a die, and a floating top platform. The punch is fixed to the middle of the lower die base and corresponds to the blank holder core. The die is arranged in a ring around the outside of the punch. The die is fixed to the lower die base, and the upper end face of the die is flush with the upper end face of the punch. The floating top platform is arranged in a ring and located between the punch and the die, and has a floating stroke in the vertical direction. The floating top platform corresponds to the punch and the die. During the floating stroke of the floating top platform, it has a first position flush with the punch and the die, and a second position lower than the punch and the die.

[0007] An air blowing assembly is used to blow air after the lower mold assembly and the upper mold assembly are opened to blow away finished parts and / or waste materials;

[0008] After the upper die assembly and the lower die assembly close and press the strip together, a portion of the strip is cut off by the punching part to obtain a first part placed on the floating top platform and the punch. The punch and die move downward to drive the floating top platform from the first position to the second position. The first part is separated to obtain a finished part and scrap. The finished part is in the gap between the punch and the die, and the scrap is on the punch.

[0009] In one embodiment, the upper end face of the punch is provided with an air suction hole, which is used to connect to an external negative pressure air pipe and to adsorb waste material.

[0010] In one embodiment, the lower mold assembly further includes:

[0011] A push plate is located below the floating top platform and moves in the vertical direction. The upper surface of the push plate is provided with a push rod, which is used to abut against the floating top platform.

[0012] Multiple floating blocks are arranged at intervals and abut against the lower end face of the push plate. The lower end of each floating block is connected to the lower mold base through a first elastic element.

[0013] Multiple first pressure rods correspond to multiple floating blocks. The lower end of each first pressure rod passes through the push plate and is fixedly connected to the corresponding floating block. The upper end of each first pressure rod protrudes from the die.

[0014] The floating block pushes the push plate upward so that the push rod on the push plate abuts against the floating top platform, thereby holding the floating top platform in the first position;

[0015] The first pressure bar presses the floating block downwards to create a gap between the push plate and the floating top platform, allowing the floating top platform to be pushed by the punch and die to the second position.

[0016] In one embodiment, the lower mold assembly further includes:

[0017] A lower die mating plate is arranged around the outside of the cavity die and fixed to the lower die base. A blanking groove with an open upper end is formed on the lower die mating plate, and the blanking groove is used to connect to the outside.

[0018] The separating block is movably mounted to the lower die base in the vertical direction. The upper end of the separating block extends toward the punch to form an extension arm. The separating block has a first discharge position and a second discharge position during its active stroke.

[0019] When the separating block is in the first discharge position, the extension arm covers the discharge groove, and the air blowing assembly is used to blow the waste away from the punch.

[0020] When the separating block is in the second discharge position, the extension arm is located above the punch and forms an infeed gap with the discharge groove. The air blowing assembly is used to blow the finished part from the infeed gap into the discharge groove.

[0021] In one embodiment, the lower end of the separating block is connected to the lower mold base via a second elastic element. The upper mold assembly includes a second pressure rod, which is fixed relative to the upper mold base. The lower end of the second pressure rod protrudes downward from the pressure core. The second pressure rod is used to abut the separating block during the mold closing process of the upper mold assembly and the lower mold assembly; and / or,

[0022] The lower end face of the extension arm is inclined downward in the direction away from the punch.

[0023] In one embodiment, the lower die mating plate is provided with two first grooves, which are respectively located on opposite sides of the blanking groove in the horizontal direction;

[0024] The lower mold assembly also includes two limiting blocks, which are respectively disposed in the two first grooves. The lower ends of each limiting block are connected by a third elastic element, so that the limiting block can protrude out of the first groove under elastic force or be retracted into the first groove under pressure.

[0025] In one embodiment, the bottom wall or side wall of the material discharge chute is provided with a notch for communicating with the outside;

[0026] An air blowing channel is formed on the lower mold mating plate. The air outlet of the air blowing channel is connected to the material drop groove and is positioned towards the notch. The air inlet of the air blowing channel is used to connect to an external air source.

[0027] In one embodiment, the air blowing assembly includes a mating member disposed on the lower mold base, a first airflow channel is formed within the mating member, and an air blowing hole communicating with the first airflow channel is provided on the side of the mating member facing the cavity mold.

[0028] The lower mold base has a second airflow channel that connects to the first airflow channel, and the second airflow channel is used to connect to an external air source.

[0029] In one embodiment, the mating component is floatingly mounted to the lower mold base in a vertical direction, so as to be able to protrude upward from the die cavity under elastic force, or to be flush with the die cavity under pressure; and / or,

[0030] The air blowing holes are spaced out in multiples.

[0031] In one embodiment, the second airflow channel includes a main channel and two branch channels connected to the main channel and arranged in parallel. The main channel is connected to the first airflow channel, and the two branch channels are used to connect to an external air source. The air intake volume of the two branch channels is set differently.

[0032] The air blowing assembly also includes two limiting rods, which are movably installed to the lower mold base in the vertical direction. The two limiting rods correspond to the two branch channels respectively and can be sealed with the branch channels. The lower ends of the two limiting rods are respectively installed through a fourth elastic element. Both limiting rods are provided with connecting holes, and the heights of the two connecting holes are set differently.

[0033] After the upper mold assembly and the lower mold assembly are closed, the two limiting rods respectively block the two branch channels;

[0034] During the separation of the upper mold assembly and the lower mold assembly, the two limiting rods are subjected to an upward elastic force, so that the two connecting holes move sequentially to connect with the corresponding branch channels, thereby opening the second airflow channel.

[0035] In one embodiment, the punch and die are engaged with the insert via an inclined surface. The upper die assembly further includes a drive ejector rod located above the punch and die and movably mounted on the upper die base in a vertical direction. The drive ejector rod is used to drive the punch and die downward; and / or,

[0036] The punch and die are recessed on opposite sides along the horizontal direction with guide grooves. The upper die assembly also includes a reset structure, which includes two inserts. The two inserts are respectively disposed in the two guide grooves. The lower ends of the two inserts are respectively connected to the lower die base or the insert through an elastic reset member so that the punch and die can be pushed upward to reset by elastic force.

[0037] In one embodiment, the blanking die further includes a plurality of material support components, which are spaced apart along a first horizontal direction. Each material support component includes two material support rods arranged opposite each other along a second horizontal direction. The two material support rods are recessed with clamping grooves on their sides facing each other. Each clamping groove is arranged through the side wall along the first horizontal direction for the feeding strip to pass through. The lower end of each material support rod is floatingly mounted to the lower die base.

[0038] In the technical solution of this invention, when the strip reaches the die, the floating top platform is in the first position, flush with the punch and die, and the punch and die are flush with the insert and the blank holder core. The upper and lower die assemblies close under the drive of the press. Simultaneously, the blanking section partially cuts off the strip to obtain the first part. At this point, the first part is on the floating top platform and the punch. Then, the punch and die move downwards, and the floating top platform moves downwards under force to the second position, thus breaking the first part to obtain the finished part and scrap. The annular finished part falls together with the floating top platform, thus being in the gap between the punch and die, while the scrap remains on the punch. Because there is a height difference between the scrap and the finished part after stamping, the air blowing assembly operates after the blanking die opens. This can blow away the scrap, or blow away the finished part after it floats up under the drive of the floating top platform. The air blowing assembly can operate intermittently, thus relying on the height difference between the finished part and the scrap to blow them away sequentially. The product boasts high stability, high yield, and fast production speed. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0040] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the blanking die provided by the present invention;

[0041] Figure 2 for Figure 1 Cross-sectional schematic diagram of the lower and middle mold assembly (at an angle);

[0042] Figure 3 for Figure 1 Cross-sectional view of the lower and middle mold assembly (from another angle);

[0043] Figure 4 for Figure 1 A cross-sectional view of the cooperation between the push plate and the floating block;

[0044] Figure 5 for Figure 1 A schematic diagram of the structure of the first pressure bar, floating block, and floating top platform;

[0045] Figure 6 for Figure 1 A schematic diagram of the structure of the middle limiting rod and the lower template in conjunction;

[0046] Figure 7 for Figure 1 A schematic diagram of the structure of the main channel and tributary channels;

[0047] Figure 8 for Figure 1 A schematic diagram of the structure of the separation block and the limiting block in operation;

[0048] Figure 9 for Figure 1 A schematic diagram of the structure of the interlocking block and the convex and concave mold;

[0049] Figure 10 for Figure 1 A schematic diagram of the structure of the drive ejector pin and the engagement of the punch and die;

[0050] Figure 11 for Figure 1 A schematic diagram of the structure of the material support rod and the material belt in operation;

[0051] Figure 12 for Figure 1 A schematic diagram of the structure of a medium blanking die in a continuous stamping equipment.

[0052] Explanation of icon numbers:

[0053] 100. Blanking Die; 1. Upper Die Assembly; 11. Upper Die Base; 12. Insert; 121. Blanking Section; 13. Punch and Die; 131. Guide Groove; 14. Blanking Core; 15. Second Pressure Rod; 16. Drive Ejector Rod; 17. Insert Block; 2. Lower Die Assembly; 21. Lower Die Base; 22. Punch; 221. Suction Hole; 23. Die; 24. Floating Ejector Platform; 25. Ejector Plate; 251. Ejector Rod; 26. Floating Block; 260. First Spring 27. First pressure bar; 28. Lower die mating plate; 281. Material drop groove; 282. Limiting block; 283. Air blowing channel; 29. ​​Separating block; 290. Material feeding gap; 291. Extension arm; 3. Air blowing assembly; 31. Mating part; 311. Air blowing hole; 321. Main channel; 322. Branch channel; 33. Limiting rod; 330. Connecting hole; 4. Material support assembly; 41. Material support rod; 411. Clamping groove; 200. Material strip.

[0054] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0055] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0056] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0057] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0058] For the processing of metal parts, especially those with small thicknesses, the traditional processing method is generally a combination of cutting and thickness grinding, such as laser cutting followed by thickness grinding. Some traditional processes also include wire cutting. However, this combination of cutting and grinding is complex, time-consuming, costly, and results in a low product yield.

[0059] Especially for the mass production needs of precision punching 1 / 2 thickness ring-shaped products of stainless steel with a sheet thickness of 0.35mm and above, the technical solution of this invention replaces the traditional machining production process, solves the problems of complex process, low yield and high cost of traditional processing methods, improves production yield, improves product stability and reduces production costs.

[0060] This invention proposes a blanking die that can be used alone according to product processing requirements or applied in continuous composite die stamping processes. Through die design and air-blowing separation technology, it replaces traditional machining processes such as wire cutting / laser cutting, achieving high-efficiency and low-cost mass production.

[0061] Please refer to Figures 1 to 3The blanking die 100 includes an upper die assembly 1, a lower die assembly 2, and an air blowing assembly 3. The upper die assembly 1 includes an upper die base 11, an insert 12, a punch and die 13, and a blank holder core 14. The blank holder core 14 is fixed to the middle of the upper die base 11. The punch and die 13 are arranged in a ring around the blank holder core 14 and can move vertically relative to the upper die base 11. The insert 12 is arranged in a ring, fixed to the upper die base 11, and is arranged around the punch and die. On the outside of 13, the lower end of insert 12 protrudes from the blanking core 14 to form a punching portion 121; the lower die assembly 2 is located below the upper die assembly 1, including a lower die base 21, a punch 22, a die 23 and a floating top platform 24. The punch 22 is fixed to the middle of the lower die base 21 and corresponds to the blanking core 14. The die 23 is arranged in a ring around the outside of the punch 22. The die 23 is fixed to the lower die base 21, and the upper end face of the die 23 is flush with the punch 22. The upper surface of the die is flush with the upper surface of the die 22. The floating top platform 24 is arranged in a ring and is located between the punch 22 and the die 23. It has a floating stroke in the vertical direction. The floating top platform 24 corresponds to the punch and die 13. During the floating stroke of the floating top platform 24, it has a first position flush with the punch 22 and the die 23, and a second position lower than the punch 22 and the die 23. The air blowing assembly 3 is used to blow air after the lower die assembly 2 and the upper die assembly 1 open the mold to blow away the finished part and / or waste. After the upper die assembly 1 and the lower die assembly 2 close the mold and press the strip 200, a part of the strip 200 is cut off by the punching part 121 to obtain the first part placed on the floating top platform 24 and the punch 22. The punch and die 13 move downward to drive the floating top platform 24 from the first position to the second position. The first part is separated to obtain the finished part and the waste. The finished part is in the gap between the punch 22 and the die 23, and the waste is on the punch 22.

[0062] It should be noted that the upper die holder 11 and the lower die holder 21 are used to fix to the top plate and bottom plate of the stamping machine, respectively. The upper die holder 11 and the lower die holder 21 can be a single plate or multiple plates stacked together.

[0063] In the technical solution of the present invention, the strip 200 reaches the die, at which point the floating top platform 24 is in the first position, flush with the punch 22 and the die 23, and the punch and die 13 are flush with the insert 12 and the blanking core 14. The upper die assembly 1 and the lower die assembly 2 are engaged by the press. At the same time as the die is engaged, the blanking part 121 cuts off a portion of the strip 200 to obtain the first part. At this time, the first part is on the floating top platform 24 and the punch 22. Then the punch and die 13 move downward and the floating top platform 24 moves downward under force to the second position, thus breaking the first part to obtain the finished part and the scrap. The annular finished part falls together with the floating top platform 24 and is therefore in the gap between the punch 22 and the die 23, while the scrap is retained on the punch 22. Because of the height difference between the scrap and the finished part after stamping, the air blowing component 3 operates after the stamping die 100 opens. This component can blow away the scrap, and also blow away the finished part after it floats up under the influence of the floating top platform 24. The air blowing component 3 can operate intermittently, thus relying on the height difference between the finished part and the scrap to blow them away sequentially. This results in high product stability, high yield, and fast production speed.

[0064] The short interval between the movement of the punch and die 13 and the blanking section 121 ensures rapid blanking.

[0065] Depending on the product and stamping requirements, the shape and height of the stamping part 121 can be set differently. Similarly, the structure of the punch and die 13 can also be set differently. In this embodiment, the inner core 14 of the blanking material is provided with a positioning protrusion, and the punch 22 is correspondingly recessed with a positioning groove.

[0066] After the finished parts and scrap are removed from the mold, the punch and die 13 and the floating top 24 are reset. The mold is closed again after the strip 200 has been conveyed for a certain distance.

[0067] The technical solution of this invention mainly targets the stamping process of metal parts, and does not limit the specific material of the metal strip 200. For example, it can be: product material SUS301 (relatively low chromium and nickel content), hardness state 3 / 4H; SUS304 (common and general-purpose stainless steel), hardness state H, hardness value HV370; product material SUS301 (relatively low chromium and nickel content), hardness state 1 / 2H; SUS304 (common and general-purpose stainless steel), hardness state 3 / 4H, hardness value HV310; SUS306L (low carbon and nitrogen strengthened austenitic stainless steel), hardness state 3 / 4H, hardness value HV250, etc.

[0068] Please refer to Figure 12When the blanking die 100 is applied in a continuous compound die stamping process, initially, multiple die structures are installed on the stamping press. The die structure at the end is the blanking die 100 proposed in this solution. The strip 200 enters the blanking die 100 after being blanked and shaped by the die structure in the previous station. The molding sequence of the strip 200 passing through the multiple die structures on the stamping press is as follows: rough cutting of product allowance (1.2T~3 / 4T, where T is the thickness of the finished part), fine cutting of product allowance (0.07mm~0.20mm), and separation of finished parts and scrap. Depending on the size and shape of different products, the number of times the product allowance rough cutting and product allowance fine cutting are performed can be set to multiple times.

[0069] Please refer to Figure 2 The upper surface of the punch 22 is provided with a suction hole 221, which is used to connect to an external negative pressure air pipe and to adsorb waste material. After the finished part is separated from the waste material in its inner ring, the suction hole 221 works to adsorb and fix the waste material on the punch 22, thereby preventing the waste material from adsorbing onto the upper mold after mold opening. This is because if the waste material is adsorbed onto the upper mold, it may be difficult or impossible to discharge, which would require manual sorting or the addition of a robotic arm for picking and sorting. By fixing the waste material on the punch 22 through the negative pressure mechanism, the waste material can be discharged through the air blowing assembly 3, which is more convenient and faster.

[0070] Multiple suction holes 221 are provided to correspond to different waste shapes of different products. The multiple suction holes 221 can be arranged at intervals along a straight line, at intervals along the circumference of the punch 22, or in an array. This invention does not limit this arrangement.

[0071] During the transition between the two positions, the floating top platform 24 should have three states: First, when the punch and die 13 move downward, the floating top platform 24 moves downward accordingly to cooperate with it; second, the floating top platform 24 actively drives the finished part upward; third, the floating top platform 24 is flush with the punch 22 and die 23 so that they can contact the strip 200 together.

[0072] In this embodiment, please refer to Figures 4 to 5The lower mold assembly 2 also includes a push plate 25, multiple floating blocks 26, and multiple first pressure rods 27. The push plate 25 is located below the floating top platform 24 and is movably mounted to the lower mold base 21 in the vertical direction. The upper end surface of the push plate 25 is provided with a push rod 251, which is used to abut against the floating top platform 24. The multiple floating blocks 26 are arranged at intervals and abut against the lower end surface of the push plate 25. The lower end of each floating block 26 is connected to the lower mold base 21 through a first elastic element 260. The multiple first pressure rods 27 correspond to the multiple floating blocks 26. The lower end of 7 passes through the push plate 25 and is fixedly connected to the corresponding floating block 26. The upper end of each first pressure rod 27 protrudes from the die 23. In this structure, the downward movement of the floating top platform 24 is driven by the punch and die 13, and the upward drive is driven by the first elastic element 260 and the floating block 26. When the first pressure rod 27 is pushed downward, the push rod 251 is in the position where the floating top platform 24 is separated. The position change of the floating top platform 24 can be controlled by the mold opening and closing action, without the need for a separate active drive mechanism.

[0073] Based on the above embodiments, when the upper mold assembly 1 and the lower mold assembly 2 separate from each other, the floating block 26 presses against the push plate 25 under the action of elastic force. At this time, the push plate 25 of the push plate 25 abuts against the floating top platform 24, so that the floating top platform 24 is kept in the first position. At this time, the upper end of the first pressure rod 27 protrudes from the die 23. After the upper mold assembly 1 and the lower mold assembly 2 are closed, at least one of the upper mold base 11 and the insert 12 can abut against the first pressure rod 27 and drive the first pressure rod 27 to overcome the elastic force and move downward. This will not affect the mold closing process of the upper mold assembly 1 and the lower mold assembly 2. At the same time, the first pressure rod 27 moves downward, so that the floating block 26 will be squeezed downward, thus having a certain distance between it and the push plate 25. Based on the frictional cooperation between the floating top platform 24 and the punch 22 and the die 23, the floating top platform 24 is still in the first position, but it is suspended and is no longer subjected to an upward force. At this time, when the punch and die 13 are downward, the floating top platform 24 is passively downward under the pressure of the punch and die 13, thus enabling it to switch to the second position. When the upper die assembly 1 and the lower die assembly 2 open again, the first pressure rod 27 is no longer subjected to external force. Therefore, under the action of the springback force, the floating block 26 and the first pressure rod 27 move upward. The floating block 26 provides an upward force to the push plate 25, thereby causing the push rod 251 of the push plate 25 to drive the floating top platform 24 to reset to the first position.

[0074] It should be understood that the first pressure rod 27 and the push plate 25 are fitted through shaft holes. At least two first pressure rods 27 are provided, corresponding to the diagonal positions of the push plate 25, to ensure balanced force application. In this embodiment, four first pressure rods 27 are provided, corresponding to the four corners of the push plate 25.

[0075] The number and arrangement of push rods 251 are determined by the shape and size of the floating top platform 24.

[0076] The floating top platform 24 and the die 23 are engaged by inclined surfaces, which can guide the lifting and lowering of the floating top platform 24 and ensure that the floating top platform 24 has sufficient frictional support when suspended.

[0077] Considering the positioning and coordination of the push plate 25 and the floating block 26, multiple step grooves are provided on the push plate 25, and the floating block 26 contacts the upper wall of the corresponding step groove.

[0078] In other embodiments, the floating top platform 24 can also be implemented by push rod 251 and gear rack, which will not be described in detail in this invention.

[0079] Furthermore, the lower mold base 21 and / or the die 23 should be provided with corresponding hollow structures to facilitate the setting of structures such as floating block 26 and push plate 25. In order to limit the position of the first pressure rod 27 after reset, the first pressure rod 27 is set with the outer diameter gradually increasing in the vertical direction to form an upward-facing stepped surface. When the stepped surface moves to abut against the corresponding template, the first pressure rod 27 reaches the limit position. At this time, the upper end of the first pressure rod 27 protrudes out of the die 23.

[0080] Please refer to Figure 1 and Figure 6The lower mold assembly 2 also includes a lower mold mating plate 28 and a separating block 29. The lower mold mating plate 28 is arranged around the outside of the die cavity 23 and fixed to the lower mold base 21. A blanking groove 281 with an open upper end is formed on the lower mold mating plate 28, which is used to connect to the outside. The separating block 29 is movably installed to the lower mold base 21 in the vertical direction. The upper end of the separating block 29 extends towards the punch 22 to form an extension arm 291. The separating block 29 has a first discharge position and a second discharge position during its active stroke. That is, the separating block 29 is an inverted L-shape, which can meet the function of installing and covering the blanking groove 281. The separating block 29 can be entirely located within the blanking groove 281, that is, it can move up and down along the blanking groove 281, or it can be installed at other positions on the lower mold mating plate 28, with the extension arm 291 extending above the blanking groove 281. Specifically, when the separating block 29 is in the first discharge position, the extension arm 291 covers the discharge chute 281, and the air blowing assembly 3 is used to blow the waste away from the punch 22. At this time, the extension arm 291 is not higher than the punch 22 in the vertical direction, so that it will not block the waste when it is blown away. In this embodiment, the extension arm 291 is flush with the punch 22, and can serve as a discharge channel for the waste when it is discharged. When the separating block 29 is in the second discharge position, the extension arm 291 is located above the punch 22, and forms an infeed gap 290 with the discharge chute 281. The air blowing assembly 3 is used to blow the finished part into the discharge chute 281 from the infeed gap 290. At this time, the finished part is blown and moves laterally. After entering from the infeed gap 290, the extension arm 291 can act as a cover to prevent the finished part from flying out, thereby ensuring that it falls into the discharge chute 281. The floating setting of the separating block 29 can simultaneously satisfy the blowing of waste and finished parts.

[0081] The separating block 29 can be equipped with a corresponding driving mechanism to enable it to move actively up and down, thereby switching between two positions. In this embodiment, the lower end of the separating block 29 is connected to the lower mold base 21 through a second elastic element. The upper mold assembly 1 includes a second pressure rod 15, which is fixed relative to the upper mold base 11. The lower end of the second pressure rod 15 protrudes downward from the pressure core 14. The second pressure rod 15 is used to hold the separating block 29 during the mold closing process of the upper mold assembly 1 and the lower mold assembly 2. Initially, the separating block 29 floats above the material drop groove 281 due to elastic force. During mold closing, the second pressure rod 15 presses the separating block 29, making it lower than the punch 22, thus not affecting the mold closing action. At the initial mold opening, the upper mold assembly 1 moves upward slightly, forming a small gap between the insert 12 and the die 23. The punch and die 13 reset, while the second pressure rod 15 remains in contact with the separating block 29. The separating block 29 then floats up to be flush with the punch 22, while the floating top platform 24 remains in the second position. At this point, the air blowing assembly 3 operates, allowing waste material to be blown out through the gap between the upper mold assembly 1 and the lower mold assembly 2. As the upper mold assembly 1 continues to float upward, the second pressure rod 15 separates from the separating block 29, the separating block 29 resets upward, and the floating top platform 24 resets to the first position. At this point, the air blowing assembly 3 operates again, allowing the finished product to enter the discharge groove 281 from the feed gap 290. With this configuration, the position change of the separating block 29 can be achieved solely through the mold closing and opening actions, and the interconnected cooperation between components avoids the need for an active drive structure.

[0082] Specifically, groove structures can be set on the concave mold 23 and the lower mold mating plate 28, and floated from the separating block 29.

[0083] Furthermore, the lower end face of the extension arm 291 is inclined downwards in the direction away from the punch 22. When the extension arm 291 is in the second discharge position, the feed gap 290 is funnel-shaped due to the inclined surface of the extension arm 291, which facilitates feeding and provides feeding guidance.

[0084] To prevent finished parts and waste from scattering during the blowing process, please refer to the following embodiment: Figure 7 and Figure 8The lower mold mating plate 28 has two first grooves recessed on its upper surface, which are located on opposite sides of the blanking groove 281 in the horizontal direction. The lower mold assembly 2 also includes two limiting blocks 282, which are located in the two first grooves. The lower ends of each limiting block 282 are connected by a third elastic element, so that the limiting block 282 can protrude from the first groove under elastic force or be compressed and stored in the first groove. The two limiting blocks 282 are pressed down by the corresponding modules in the upper mold assembly 1 and stored in the two first grooves, which will not interfere with the mold closing. After the upper mold assembly 1 and the lower mold assembly 2 are separated, the two limiting blocks 282 are not restricted by external force and can therefore float elastically to move upward to a certain height. When the separation block 29 is in the first discharge position, a limiting channel is defined between the two limiting blocks 282. The blowing direction of the air blowing assembly 3 is consistent with the extension direction of the limiting channel, and the waste material can be blown away along the limiting channel. When the separating block 29 is in the second discharge position, the limiting channel defined by the two limiting blocks 282 is connected to the feeding gap 290, so that the finished part is blown along the limiting channel, thereby ensuring that the discharge can be in the specified direction and will not move in all directions.

[0085] The two limiting blocks 282 are positioned so that their sides face away from each other and move away from each other in the direction of the punch 22, that is, the limiting channel is set in a trumpet shape.

[0086] Furthermore, the limiting block 282 can cooperate with the separating block 29, with the extension arm 291 positioned between the two limiting blocks 282, and the width of the main body of the separating block 29 being greater than the width of the limiting channel.

[0087] After the finished parts are removed from the lower mold assembly 2, they need to be collected. Ideally, the finished parts should fall into the external material box after passing through the discharge chute 281. However, considering the thinness of the finished parts, if static electricity occurs, they will stick to the wall of the discharge chute 281 and cannot be discharged. Therefore, in this embodiment, please refer to... Figure 1 and Figure 7 The bottom or side wall of the material discharge trough 281 is provided with a notch for connecting to the outside; an air blowing channel 283 is formed on the lower mold mating plate 28, the air outlet of the air blowing channel 283 is connected to the material discharge trough 281 and is oriented towards the notch, and the air inlet of the air blowing channel 283 is used to connect to an external air source. The air inlet of the air blowing channel 283 is connected to an air pipe connector, thereby connecting to an external air pipe through the air pipe. Through the air blowing channel 283, the finished parts entering the material discharge trough 281 can be blown with air a second time to ensure that the finished parts can flow out from the notch and enter the material box for collection.

[0088] It should be noted that, depending on the location of the notch, the air blowing channel 283 can extend vertically or diagonally.

[0089] The air blowing assembly 3 is designed to expel waste material and finished parts from the mold by blowing air. In this embodiment, please refer to... Figures 6 to 7 The air blowing assembly 3 includes a mating part 31, which is disposed on the lower mold base 21. A first airflow channel is formed in the mating part 31, and an air blowing hole 311 communicating with the first airflow channel is provided on the side of the mating part 31 facing the die 23. A second airflow channel communicating with the first airflow channel is formed on the lower mold base 21, and the second airflow channel is used to communicate with an external air source.

[0090] In this embodiment, the mating part 31 is directly integrated into the mold structure, thereby reducing the distance between the air blowing hole 311 of the mating part 31 and the material to be discharged, and improving the discharge effect. The second airflow channel is an internal air passage. Airflow is injected into the second airflow channel by setting an air pipe connector. The airflow is introduced into the first airflow channel extending in the vertical direction, thereby completing the blowing action through the side-mounted air blowing hole 311.

[0091] It should be noted that the mating part 31 should protrude from the punch 22 during use to ensure the blowing range. Therefore, a clearance groove can be provided at the corresponding position in the upper mold assembly 1 to avoid the problem of mold closing interference of the mating part 31. In this embodiment, the mating part 31 is floated and installed to the lower mold base 21 in the vertical direction so that it can protrude upward from the die 23 under the action of elastic force, or be flush with the die 23 under pressure downward. With this setting, when the mold is closed, the mating part 31 can be squeezed to overcome the elastic force and be stored in the groove, which does not affect the mold closing fit. After the mold is opened, it can be automatically ejected by the rebound force to ensure the air output effect.

[0092] Specifically, the mating part 31 can be movably installed in the groove by a spring. It should be understood that after the mating part 31 floats upward, the mating part 31 and the groove should be sealed together. After the airflow in the second airflow channel is introduced into the groove, airflow leakage can be avoided, thereby ensuring that the airflow can enter the first airflow channel and be discharged.

[0093] Based on the adhesion strength and adhesion range between the material and the mold, multiple air blowing holes 311 are set at intervals. That is, after air enters the first airflow channel, it will be evenly distributed into multiple air blowing holes 311, thereby increasing the air blowing range and ensuring the uniformity of air blowing.

[0094] Because the finished parts and scrap materials have different dimensions and different contact areas with the corresponding modules, there are differences in adhesion. Especially when the scrap material is adsorbed and fixed onto the punch 22 by external negative pressure, blowing air onto the scrap material also needs to overcome the negative pressure adsorption force. Therefore, in this embodiment, please refer to... Figure 7To address the issue of differing air volume when waste materials and finished parts are discharged, the second airflow channel includes a main flow channel 321 and two branch channels 322 connected to the main flow channel 321 and arranged in parallel. The main flow channel 321 is connected to the first airflow channel, and the two branch channels 322 are used to connect to external air sources. The air intake volumes of the two branch channels 322 are set differently. The two branch channels 322 are respectively connected to two air pipe joints and connected to different air sources. The air blowing assembly 3 has two limiting rods 33, which are movably installed to the lower mold base 21 in the vertical direction. Each limiting rod 33 corresponds to one of the two branch channels 322 and can seal with them. The lower ends of each limiting rod 33 are installed via a fourth elastic element. Both limiting rods 33 have connecting holes 330 at different heights. The two limiting rods 33 float and can be compressed during mold closing, thus preventing interference with the mold closing mechanism. Although the two limiting rods 33 are at the same height, their connecting holes 330 are at different positions. An external air source is always supplied. The air output from the air blowing hole 311 can be controlled by varying the engagement state of the upper mold assembly 1 and the lower mold assembly 2, as well as the difference in the lifting height of the upper mold assembly 1. This eliminates the need for frequent adjustments to the external air source during production and avoids the need for solenoid valves at the air pipe joints. The structure is simple.

[0095] Specifically, after the upper mold assembly 1 and the lower mold assembly 2 are closed, the two limiting rods 33 respectively block the two branch channels 322. At this time, both branch channels 322 are blocked, and the air blowing hole 311 does not blow air. Even if both branch channels 322 are connected to external air sources, it will not affect the mold processing process. During the separation of the upper mold assembly 1 and the lower mold assembly 2, the two limiting rods 33 are subjected to upward elastic force. Since the heights of the two connecting holes 330 are different, one of the two connecting holes 330 first connects to the corresponding branch channel 322, and the other branch channel 322 is blocked, so that the first... When the two airflow channels are open, the air blowing hole 311 blows air with the first air volume to blow away the waste material. After the upper mold assembly 1 stays at this height for a certain period of time, the waste material discharge action is completed. Then the upper mold assembly 1 continues to rise, and another connecting hole 330 connects to the corresponding connecting hole 330. The previously connected branch channel 322 is blocked, so that the second airflow channel is open. At this time, the air blowing hole 311 blows air with the second air volume to blow away the waste material. After the upper mold assembly 1 stays at this height for a certain period of time, the finished part discharge action is completed. Then the upper mold assembly 1 is raised to fully open the mold.

[0096] It should be noted that when the waste material is fixed on the punch 22 by negative pressure adsorption, the air intake of the corresponding branch channel 322 needs to overcome the negative pressure adsorption force, and the airflow of the corresponding air pipe joint is greater than the airflow of the negative pressure system.

[0097] The difference in airflow between the two branch channels 322 can be achieved by the difference in their diameters or by the difference in their intake volume.

[0098] For upper mold component 1, please refer to Figure 10 The up-and-down movement of the punch and die 13 is achieved by active drive. Specifically, the punch and die 13 and the insert 12 are engaged by inclined surfaces to ensure that they have a good guiding effect. The upper mold assembly 1 also includes a drive ejector rod 16, which is located above the punch and die 13 and is mounted on the upper mold base 11 in the up-and-down direction. The drive ejector rod 16 is used to drive the punch and die 13 to move downward.

[0099] In some embodiments, please refer to Figure 1 and Figure 9 The drive rod 16 is fixedly connected to the punch and die 13, thereby actively driving the punch and die 13 downward and upward. Considering the assembly and replacement of the mold, in this embodiment, the punch and die 13 are recessed on both sides opposite each other in the horizontal direction with guide grooves 131. The upper mold assembly 1 also includes a reset structure, which includes two inserts 17. The two inserts 17 are respectively disposed in the two guide grooves 131. The lower ends of the two inserts 17 are respectively connected to the lower mold base 21 or the insert 12 through an elastic reset member, so that the punch and die 13 can be pushed upward by the elastic force to reset. The downward movement of the punch and die 13 can be actively driven by the drive rod 16. The punch and die 13 drive the inserts 17 downward together. After the driving work is completed, the drive rod 16 resets. At this time, the punch and die 13 is not subjected to any force, and the inserts 17 are subjected to the rebound force to drive the punch and die 13 to reset up and down.

[0100] It should be noted that the insert 17 is always inserted into the two guide slots 131.

[0101] The strip 200 has a certain length and may be a coil. Therefore, after each stamping operation, the strip 200 needs to be driven to move a certain distance. In this embodiment, please refer to... Figure 8 and Figure 11The blanking die 100 also includes multiple material support assemblies 4, spaced apart along a first horizontal direction. Each material support assembly 4 includes two material support rods 41 arranged opposite each other along a second horizontal direction. The two material support rods 41 have recessed clamping grooves 411 on their sides facing each other. Each clamping groove 411 is through-connected along the side wall of the first horizontal direction for feeding the strip 200 through. The lower ends of each material support rod 41 are floatingly mounted to the lower die base 21. During processing, the strip 200 is always clamped and positioned by the clamping grooves 411. When the strip 200 is driven to move, it can move within the clamping grooves 411. When the die is opened, each material support rod 41 floats upwards, causing the strip 200 to separate from the lower die assembly 2. The movement of the strip 200 will not interfere with the corresponding structures on the lower die assembly 2. When the mold is closed, the strip 200 is driven to move downward, and the support rod 41 is squeezed downward, thereby preventing the strip 200 from moving around due to the height difference between it and the support rod 41 during the stamping process.

[0102] In the technical solution of the present invention, the product is finally punched and formed by the air blowing component 3 with interval action, the air suction hole 221 with negative pressure action to fix the waste material, and the separation block 29 for separating the finished parts and the waste material discharge.

[0103] In addition, the upper mold assembly 1 and the lower mold assembly 2 should also be provided with corresponding guide structures, such as guide pillars and guide grooves 131, which will not be described in detail in this invention.

[0104] Please refer to Figure 1 In this embodiment, the processing of the blanking die 100 is as follows: the upper die assembly 1 and the lower die assembly 2 separate, at which time the separating block 29, the first pressure rod 27, the limiting block 282, the mating part 31, the limiting rod 33, and the material support rod 41 all float upwards. The upper die assembly 1 moves downwards to close with the lower die assembly 2, the second pressure rod 15 abuts against the separating block 29 and floats downwards, and the first pressure rod 27, the limiting block 282, the mating part 31, the limiting rod 33, and the material support rod 41 are pressed down and floated downwards by the corresponding templates.

[0105] After stamping is completed and the mold opens, the upper mold assembly 1 is at the first dwell height, the punch and die 13 return to their original position, the floating top platform 24 is at the second position, the separating block 29 is at the first discharge position, the material support rod 41 floats up, and the connecting hole 330 of one of the limiting rods 33 connects to the corresponding branch channel 322, allowing the waste material to be discharged. The upper mold assembly 1 is raised to the second dwell height, the floating top platform 24 is at the first position, the separating block 29 is at the second discharge position, the connecting hole 330 of the other limiting rod 33 connects to the corresponding branch channel 322, the finished part enters the blanking groove 281, and at the same time, the air blowing channel 283 blows air to discharge the finished part to the material box outside the mold.

[0106] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A blanking die characterized by, The punch die comprises: an upper die assembly comprising an upper die seat, an insert, a punch and a die, the die being annularly arranged outside the die core and movable up and down relative to the upper die seat, the insert being annularly arranged outside the punch and fixed to the upper die seat, the lower end of the insert protruding from the die core to form a punching portion; a lower die assembly located below the upper die assembly and comprising a lower die seat, a punch, a die and a floating top platform, the punch being fixed to the middle part of the lower die seat and corresponding to the die core, the die being annularly arranged outside the punch, the die being fixed to the lower die seat and the upper end surface of the die being flush with the upper end surface of the punch, the floating top platform being annularly arranged between the punch and the die and having a floating stroke in the up-down direction, the floating top platform corresponding to the punch and the die, the floating top platform having a first position flush with the punch and the die and a second position lower than the punch and the die in the floating stroke of the floating top platform; a blowing assembly for blowing after the lower die assembly and the upper die assembly are opened to blow the finished parts and / or waste materials away; after the upper die assembly and the lower die assembly are closed to compress the material strip, a part is obtained by cutting part of the material strip by the punching portion and placed on the floating top platform and the punch, the punch and the die are moved downward to drive the floating top platform to switch from the first position to the second position, the first part is separated to obtain a finished part and waste material, the finished part being in the gap between the punch and the die, and the waste material being on the punch.

2. The blanking die of claim 1, wherein, The upper end surface of the punch is provided with an air suction hole for connecting an external negative pressure air pipe, and the air suction hole is used for adsorbing waste material.

3. The blanking die of claim 1, wherein, The lower die assembly further comprises: a push plate located below the floating top platform and movable in the up-down direction, the upper end surface of the push plate being provided with a push rod for abutting against the floating top platform; a plurality of floating blocks arranged in intervals and abutting against the lower end surface of the push plate, the lower end of each floating block being connected to the lower die seat through a first elastic member; a plurality of first pressing rods corresponding to the plurality of floating blocks, the lower end of each first pressing rod being fixedly connected to the corresponding floating block through the push plate, and the upper end of each first pressing rod protruding from the die; the floating blocks push the push plate upward so that the push rod on the push plate abuts against the floating top platform to keep the floating top platform in the first position; the floating blocks are pressed downward by the first pressing rods so that the push plate is spaced apart from the floating top platform, and the floating top platform can be driven by the punch and the die to switch to the second position.

4. The blanking die of claim 1, wherein, The lower die assembly further comprises: a lower die matching plate annularly arranged outside the die and fixed to the lower die seat, the lower die matching plate being provided with a blanking groove with an open upper end, and the blanking groove being used for connecting an external part. A separation block is movably mounted to the lower die base in the up-down direction, the upper end of the separation block extends towards the punch to form an extension arm, the separation block has a first discharging position and a second discharging position in its movable stroke; When the separation block is at the first discharging position, the extension arm covers the blanking groove, and the blowing assembly is used to blow the waste away from the punch; When the separation block is at the second discharging position, the extension arm is above the punch, and a feeding gap is formed between the extension arm and the blanking groove, and the blowing assembly is used to blow the finished part into the blanking groove from the feeding gap.

5. The blanking die of claim 4, wherein, The lower end of the separation block is connected to the lower die base by a second elastic member, the upper die assembly includes a second pressing rod, the second pressing rod is fixed opposite to the upper die base, the lower end of the second pressing rod protrudes downward from the blanking inner core, and the second pressing rod is used to resist the separation block during the closing of the upper die assembly and the lower die assembly; and / or The lower end surface of the extension arm is inclined downward in the direction away from the punch.

6. The blanking die of claim 4, wherein, Two first grooves are concavely arranged on the lower die fitting plate, and the two first grooves are arranged on opposite sides of the blanking groove in the horizontal direction; The lower die assembly further includes two limiting blocks, the two limiting blocks are arranged in the two first grooves, and the lower end of each limiting block is connected by a third elastic member, so that the limiting block can protrude from the first groove under the action of elastic force or be accommodated in the first groove under the action of pressure.

7. The blanking die of claim 4, wherein, The bottom wall or the side wall of the blanking groove is provided with a gap for communicating with the outside; A blowing passage is formed on the lower die fitting plate, the gas outlet of the blowing passage communicates with the blanking groove and is arranged towards the gap, and the gas inlet of the blowing passage is used to communicate with the external gas source.

8. The blanking die of claim 1, wherein, The blowing assembly includes a fitting member arranged on the lower die base, a first airflow passage is formed in the fitting member, and a blowing hole communicating with the first airflow passage is arranged on the side surface of the fitting member facing the punch; A second airflow passage communicating with the first airflow passage is formed on the lower die base, and the second airflow passage is used to communicate with the external gas source.

9. The blanking die of claim 8, wherein, The fitting member is floatingly mounted to the lower die base in the up-down direction, so as to be able to protrude upward from the punch under the action of elastic force or be flush with the punch under the action of pressure; and / or The blowing holes are spaced apart.

10. The blanking die of claim 8, wherein, The second airflow passage includes a main flow channel and two branch flow channels communicating with the main flow channel and arranged in parallel, the main flow channel communicates with the first airflow passage, the two branch flow channels are used to communicate with the external gas source, and the gas inlets of the two branch flow channels are arranged differently; The blowing assembly further includes two limiting rods movably mounted to the lower die base in the up-down direction, the two limiting rods correspond to the two branch flow channels respectively and can be sealingly fitted with the branch flow channels, the lower end of each limiting rod is mounted by a fourth elastic member, and the two limiting rods are both provided with a communication hole, and the heights of the two communication holes are arranged differently; After the upper die assembly and the lower die assembly are closed, the two limiting rods seal the two branch flow channels respectively. During the separating process of the upper die assembly and the lower die assembly, the two limiting rods are upwardly pushed by elastic force, so that the two communication holes are sequentially moved to be communicated with the corresponding branch runners, so that the second airflow channel is conducted.

11. The blanking die of claim 1, wherein, The male and female dies are matched with the insert through a slope, the upper die assembly further comprises a driving ejector rod, the driving ejector rod is located above the male and female dies and is movably installed on the upper die seat in the up-down direction, and the driving ejector rod is used for driving the male and female dies to move downward; and / or, The male and female dies are matched with the insert through a slope, the upper die assembly further comprises a driving ejector rod, the driving ejector rod is located above the male and female dies and is movably installed on the upper die seat in the up-down direction, and the driving ejector rod is used for driving the male and female dies to move downward; and / or, 12. The blanking die of claim 1, wherein, The blanking die further comprises a plurality of material supporting assemblies, the plurality of material supporting assemblies are spaced apart along a first horizontal direction, each material supporting assembly comprises two material supporting rods oppositely arranged along a second horizontal direction, the side surfaces of the two material supporting rods facing each other are concavely provided with clamping grooves, the side walls of each clamping groove along the first horizontal direction are throughly provided, for the material belt to pass through, and the lower ends of the two material supporting rods are floatingly installed on the lower die seat. The blanking die further comprises a plurality of material supporting assemblies, the plurality of material supporting assemblies are spaced apart along a first horizontal direction, each material supporting assembly comprises two material supporting rods oppositely arranged along a second horizontal direction, the side surfaces of the two material supporting rods facing each other are concavely provided with clamping grooves, the side walls of each clamping groove along the first horizontal direction are throughly provided, for the material belt to pass through, and the lower ends of the two material supporting rods are floatingly installed on the lower die seat.

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