Punching mechanism, punching die, and punching method

Abstract

The present application provides a kind of blanking mechanism, blanking die and blanking method, blanking mechanism is used to blanking for material belt, blanking mechanism has first blanking position and second blanking position;Blanking mechanism includes: semi-finished product punch, can blanking for material belt motion to first blanking position, form semi-finished product;Carrier, can accept semi-finished product in first blanking position and send semi-finished product to second blanking position;Forming into son, can accept semi-finished product in second blanking position;Finished product punch, cooperate with forming into son, blanking for semi-finished product in second blanking position, form finished product.This makes that product from semi-finished product processing is completed to finished product processing process, completely separates from material belt, is pushed to next forming station in transmission mode, solves the problem of semi-finished product drop, prolongs the die life, saves the time of forming punch processing and greatly reduces the processing cost of punch.

Description

Technical Field

[0001] This invention relates to the field of blanking equipment technology, and in particular to a blanking mechanism, a blanking die, and a blanking method. Background Technology

[0002] The three-peak wave springs commonly used in various motors are made of thin material, have a small outer diameter (16.0 mm), and are round with regular concave and convex shapes. Generally, the initial process uses a method where the product is separated from the shallow forming die, resulting in relatively stable forming. However, this method has two drawbacks: firstly, the shallow forming punch requires 3D surface machining, which is time-consuming and expensive; secondly, after the product is separated from the material strip in the shallow forming process, it gets stuck back on the strip, which then carries it to the next step. During this process, the product occasionally falls into the mold, affecting production efficiency and product quality, and in severe cases, damaging the mold inserts. Summary of the Invention

[0003] The first aspect of the present invention provides a punching method to solve the defect in the prior art where, during the process of feeding shallowly shaped products from a strip to the next step, the products occasionally fall into the mold, affecting production efficiency and product quality, and in severe cases, damaging the mold inserts.

[0004] To achieve the above objectives, the technical solution of the present invention is: a punching mechanism for punching strip material.

[0005] The blanking mechanism has a first blanking position and a second blanking position;

[0006] The punching mechanism includes:

[0007] The semi-finished product punch is capable of punching the strip of material that has moved to the first punching position to form a semi-finished product;

[0008] The carrier is capable of receiving the semi-finished product at the first punching position and transporting the semi-finished product to the second punching position;

[0009] The forming insert is capable of receiving the semi-finished product at the second punching position;

[0010] The finishing punch, in conjunction with the forming insert, stamps the semi-finished product located in the second punching position to form the finished product.

[0011] Preferably, the carrier can be opened at the first and second punching positions to receive and place the semi-finished product.

[0012] Preferred options also include:

[0013] A drive unit is connected to the carrier in a transmission manner and is used to drive the carrier to move.

[0014] Preferably, the carrier includes:

[0015] The movable push block has a first recess.

[0016] A movable locking block is hinged to the movable push block. The movable locking block is provided with a second recess that matches the first recess. The first recess and the second recess combine to form a receiving cavity. A top material pin is provided in the receiving cavity. The semi-finished product is located in the receiving cavity and abuts against the top material pin.

[0017] The first spring has its two ends connected to the movable push block and the movable latch block respectively, and is used to keep the movable push block and the movable latch block in a fitted state.

[0018] Preferably, the punching mechanism further includes:

[0019] The first push block, when the carrier moves to the first punching position, can move and push the movable push block and the movable locking block to rotate relative to each other so that they open up to each other;

[0020] The second push block can move and push the movable push block and the movable locking block to rotate relative to each other so that they open up to each other when the carrier moves to the second punching position.

[0021] During the movement of the carrier from the first punching position to the second punching position, the movable push block and the movable locking block are in contact with each other.

[0022] Preferably, one end of the movable push block and the movable latch block are connected by a connecting pin, and the other end of the movable push block and the movable latch block have a notch;

[0023] When the carrier moves to the first punching position, the first push block partially embeds into the notch;

[0024] When the carrier moves to the second punching position, the second push block partially embeds into the notch.

[0025] Preferably, the first push block is disposed on one side of the carrier, and a limit block is disposed on the other side of the carrier. The limit block is used to restrict the relative rotation between the movable locking block and the movable push block during the movement of the carrier.

[0026] The movable locking block is provided with a groove. When the carrier moves to the second punching position, the limiting block is partially in the groove, and the movable locking block and the push block can rotate relative to each other.

[0027] Preferably, a second spring is provided at the bottom of both the first push block and the second push block. When the carrier moves to the first punching position and the second punching position, the second spring is in the unfolded state. When the carrier leaves the first punching position and the second punching position, the second spring switches from the unfolded state to the compressed state.

[0028] A second aspect of the present invention provides a blanking die, comprising: an upper die holder; and a lower die holder;

[0029] And a punching mechanism as described in any of the above embodiments, wherein the semi-finished punch and the finished punch are disposed on the upper die base, and the carrier and the forming insert are disposed on the lower die base.

[0030] A third aspect of the present invention provides a blanking method using a blanking die as described in the above embodiments, comprising:

[0031] S100: Convey the strip to the first punching position;

[0032] S200: The carrier moves to the first punching position and is below the strip. The semi-finished product punch punches the strip at the first punching position to form a semi-finished product, which falls onto the carrier.

[0033] S300: The carrier transports the semi-finished product from the first blanking position to the second blanking position and drops it from the carrier onto the forming insert;

[0034] S400: The finished product punch presses the semi-finished product to form the finished product.

[0035] Compared with the prior art, the beneficial effects of the present invention are: by setting up a carrier to receive and smoothly transport the semi-finished product after being punched by the semi-finished punch to the top of the forming insert for punching by the finished product punch, the product is completely separated from the material strip during the process from semi-finished product processing to finished product processing, and is pushed to the next forming station by a transfer method, which solves the problem of semi-finished product falling, extends the mold life, saves the processing time of the forming punch, and greatly reduces the processing cost of the punch. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1This is a schematic diagram of the structure of the blanking die provided by the present invention;

[0038] Figure 2 This is a schematic diagram of the punching mechanism provided by the present invention;

[0039] Figure 3 This is a schematic diagram of the installation of the semi-finished cutting block and the forming insert provided by the present invention;

[0040] Figure 4 yes Figure 3 A magnified view of part 'a' in the diagram;

[0041] Figure 5 This is an installation diagram of the carrier and the first and second push blocks provided by the present invention;

[0042] Figure 6 This is a schematic diagram of the structure of the carrier provided by the present invention.

[0043] Figure label:

[0044] 10. Semi-finished punch; 20. Finished punch; 30. Carrier component; 31. Movable push block; 311. First recess; 32. Movable locking block; 321. Second recess; 322. Groove; 33. First spring; 34. Notch; 40. Forming insert; 50. Drive device; 60. First push block; 70. Second push block; 80. Connecting pin; 90. Ejector pin; 100. Limiting block; 110. Upper mold base; 120, lower mold base; 130, upper clamping plate; 140, stripper plate; 150, lower template; 160, lower backing plate; 170, air blowing pin; 180, semi-finished product cutting block; 181, semi-finished product cutting edge; 190, cutting edge fixing block; 200, pad block; 201, mounting hole; 210, cylinder fixing block; 220, backing plate; 230, blocking block; 240, second spring; 250, equal height sleeve. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0046] like Figures 1 to 6 As shown in the figure, this application provides a punching mechanism for punching a strip of material. The punching mechanism has a first punching position and a second punching position, and the strip of material can be punched at the first punching position and the second punching position.

[0047] The punching mechanism includes a semi-finished product punch 10, a finished product punch 20, a carrier component 30, and a forming insert 40. The strip material is in motion. When the strip material moves to the first punching position, the semi-finished product punch 10 punches the strip material to form a semi-finished product. The carrier component 30 is movable. When the carrier component 30 moves to the first punching position, it can receive the semi-finished product that has fallen off the strip material after punching and transport it to the second punching position. The forming insert 40 is set at the second punching position to receive the semi-finished product. The finished product punch 20 is set above the forming insert 40. The forming punch and the forming insert 40 cooperate to punch the semi-finished product at the second punching position to form the finished product. In this way, the product is completely separated from the strip material during the process from semi-finished product processing to finished product processing. It is pushed to the next forming station by a transfer method, which solves the problem of semi-finished product falling off, extends the mold life, saves the processing time of the forming punch, and significantly reduces the processing cost of the punch.

[0048] The carrier 30 can open at both the first and second punching positions to receive and place the semi-finished product. When the carrier 30 is open, the semi-finished product, after being punched by the semi-finished product punch 10, falls onto the carrier 30. When the carrier 30 transports the semi-finished product to the second punching position, it opens again, allowing the semi-finished product to fall onto the forming insert 40. The finishing punch 20 punches the semi-finished product to obtain the finished product. The carrier 30 uses a clamping method to transport the semi-finished product, ensuring its stability during transport and preventing it from falling. This saves processing time and reduces processing costs for the forming punch. It is important to understand that the carrier 30 is closed during the transport of the semi-finished product from the first punching position to the second punching position; that is, the carrier 30 clamps the semi-finished product.

[0049] Furthermore, the blanking mechanism also includes a drive device 50, which is connected to the carrier 30 for driving the carrier 30 to move. It should be noted that the drive device 50 drives the carrier 30 to reciprocate linearly. The drive device 50 can be a servo motor, an electric cylinder, or a pneumatic cylinder, etc., and here a pneumatic cylinder is preferred for driving the carrier 30.

[0050] The carrier component 30 includes a movable push block 31, a movable locking block 32, and a first spring 33. The movable push block 31 is connected to the drive device 50. A first recess 311 is provided on the movable push block 31. The first recess 311 is semi-circular. The movable locking block 32 is hinged to the movable push block 31, so that one end of the movable locking block 32 and the movable push block 31 can be opened. A second recess 321 is provided on the movable push block 31. The shape of the second recess 321 is adapted to the first recess 311. That is, the first recess 311 is also semi-circular. Since the workpiece to be processed is circular, the first recess 311 and the second recess 321 combine to form a receiving cavity. The receiving cavity is cylindrical, and a top pin 90 is provided inside the receiving cavity. After the semi-finished product is punched by the semi-finished product punch 10, it will fall onto the top pin 90. The two ends of the first spring 33 are respectively connected to the movable push block 31 and the movable locking block 32 to keep the movable push block 31 and the movable locking block 32 in a closed state. That is, to prevent the movable push block 31 and the movable locking block 32 from opening.

[0051] The punching mechanism also includes a first pusher block 60 and a second pusher block 70. The first pusher block 60 and the second pusher block 70 are disposed on one side of the carrier 30. When the carrier 30 moves to the first punching position, the first pusher block 60 can move and push the movable pusher block 31 and the movable locking block 32 to rotate relative to each other so that they open up to each other. At this time, the semi-finished product punched by the semi-finished product punch 10 can fall into the receiving cavity. When the carrier 30 moves to the second punching position, the second pusher block 70 can move and push the movable pusher block 31 and the movable locking block 32 to rotate relative to each other so that they open up to each other. At this time, the semi-finished product inside the receiving cavity can fall onto the forming insert 40 for the forming punch to punch out the finished product. During the movement of the carrier 30 from the first punching position to the second punching position, the movable push block 31 and the movable locking block 32 are in contact with each other. At the same time, the first push block 60 is limited by the movable push block 31, and the first push block 60 abuts against the side wall of the movable push block 31. The movement of the second push block 70 changes from an extended state to a retracted state due to the resistance of the pushing locking block. When the carrier 30 moves to the second position, the second push block 70 changes from a retracted state to an extended state and drives the movable locking block 32 to partially separate from the movable push block 31, so that the movable push block 31 and the movable locking block 32 open.

[0052] Specifically, one end of the movable push block 31 and the movable locking block 32 are connected by a connecting pin 80. The connecting pin 80 allows the movable push block 31 and the movable locking block 32 to rotate relative to each other. The other end of the movable push block 31 and the movable locking block 32 has a notch 34. When the carrier 30 moves to the first punching position, the first push block 60 partially inserts into the notch 34. At this time, the first push block 60 can push the movable locking block 32, causing the movable locking block 32 to rotate. The space of the receiving cavity increases, which can receive the semi-finished product after being punched by the semi-finished product punch 10. When the carrier 30 moves to the second punching position, the second push block 70 partially inserts into the notch 34. At this time, the second push block 70 can push the movable locking block 32, causing the movable locking block 32 to rotate. The space of the receiving cavity increases, and the semi-finished product inside the receiving cavity can fall from the receiving cavity onto the forming insert 40.

[0053] A limiting block 100 is provided on the other side of the carrier 30. The limiting block 100 is disposed opposite to the first and second push blocks 70. The limiting block 100 is used to restrict the relative rotation of the movable locking block 32 and the movable push block 31 during the movement of the carrier 30. The movable locking block 32 is provided with a groove 322. When the carrier 30 moves to the second punching position, the limiting block 100 is partially in the groove 322, and the movable locking block 32 and the push block can rotate relative to each other. The position of the limiting block 100 is fixed. In this application, the heads of the first push block 60, the second push block 70 and the limiting block 100 are all configured to protrude from both ends toward the center. This prevents the carrier 30 from squeezing and damaging the first push block 60 and the second push block 70 during the movement. At the same time, it can enter the notch 34 at the first punching position and the second punching position to allow the movable locking block 32 to rotate.

[0054] The extension movements of both the first push block 60 and the second push block 70 are driven by an elastic element, specifically a second spring 240. The second spring 240 is located at the bottom of both the first push block 60 and the second push block 70, and both are connected to it. The other end of the second spring 240 is restricted. When the carrier 30 moves to the first and second punching positions, the second spring 240 is in an extended state. When the carrier 30 leaves the first and second punching positions, the second spring 240 switches from an extended state to a compressed state. By using the second spring 240 for driving, the transition between the movement modes of the first push block 60 and the second push block 70 becomes more convenient.

[0055] like Figures 1 to 6As shown, a second aspect of the present invention provides a blanking die, comprising: an upper die base 110, a lower die base 120, and a blanking mechanism as described in any of the above embodiments, wherein a semi-finished punch 10 and a finished punch 20 are disposed on the upper die base 110, and a carrier 30 and a forming insert 40 are disposed on the lower die base 120. An upper clamping plate 130 is disposed on the upper die base 110 for fixing the semi-finished punch 10 and the finished punch 20. The upper die base 110 is used to fix the upper clamping plate 130 and is connected and fixed to a punch press. A stripper plate 140 is also connected to the upper clamping plate 130. The stripper plate 140 is used to fix the stripper insert and press the material strip during blanking, and to allow the punch to detach from the material strip after blanking. A height-equal sleeve 250 is connected between the stripper plate 140 and the upper clamping plate 130. A lower die plate 150 is also disposed on the lower die base 120 for fixing the lower die insert. Two lower die plates 150 are arranged opposite each other. The carrier component 30 is positioned between the two lower die plates 150. The first pusher block 60, the second pusher block 70, and the second spring 240 are mounted on one of the lower die plates 150. The limiting block 100 is mounted on the other lower die plate 150. A lower pad 160 is also provided below the lower die plate 150 to bear the punching force of the lower die insert. The lower die base 120 is used to fix the lower die plate 150 and the lower die insert and is connected and fixed to the punch press. An air blowing pin 170 is provided on one side of the forming insert 40. The air blowing pin 170 is used to blow the formed product out of the forming position. Two air-blowing pins 170 are provided, spaced apart and aligned with the forming position of the forming insert 40. A semi-finished product cutter block 180 is provided at the first punching position, with a semi-finished product cutting edge 181 on the semi-finished product cutter block 180. A semi-finished product punch 10 is positioned above the semi-finished product cutting edge 181. When the strip passes over the semi-finished product cutting edge 181, the semi-finished product punch 10 punches the strip and cuts out the semi-finished product under the action of the semi-finished product cutting edge 181. A cutting edge fixing block 190 is also fixedly provided between the two lower templates 150 to fix the semi-finished product. The finished blade block 180 has a pad block 200 below the movable push block 31. The pad block 200 is used to ensure the smooth pushing of the movable push block 31. A mounting hole 201 is provided at the end of the pad block 200 away from the cylinder. The forming insert 40 is placed in the mounting hole 201. A cylinder fixing block 210 and a pad plate 220 are also provided at the end and bottom of the cylinder. The pad plate 220 is used to fix the cylinder fixing block 210 and the cylinder fixing block 210 is used to fix the cylinder. A blocking block 230 is also provided at the end of the movable push block 31. The blocking block 230 is used to accurately position the movable push block 31.

[0056] This application also provides a blanking method using the blanking die of the above embodiments, including:

[0057] S100: Convey the strip to the first punching position;

[0058] S200: The carrier 30 moves to the first punching position and is below the strip. The semi-finished product punch 10 punches the strip at the first punching position to form a semi-finished product, which falls to the carrier 30.

[0059] S300: The carrier 30 transports the semi-finished product from the first punching position to the second punching position and drops it from the carrier 30 onto the forming insert 40;

[0060] S400: Finishing punch 20 presses semi-finished products to form finished products.

[0061] The following is a detailed description using specific examples:

[0062] The material strip feeding step distance is 18.0 mm, the transmission distance of the carrier 30 is 25.0 mm, and the angle between the material strip feeding direction and the transmission direction of the carrier 30 is 90°. First, the mold drives the upper mold base 110 to start descending. At the first punching position, the semi-finished product is produced by the semi-finished product punch 10 punching the material strip. At this time, under the action of the second spring 240 and the first push block 60, the movable block 32 opens at a certain angle with the connecting pin 80 as the center. The angle here is about 1.5 degrees, and the opening distance of the movable block 32 is about 0.35 mm. At this time, the semi-finished product falls into the ejector pin 90 in the receiving cavity under the action of gravity after punching. After the mold drives the upper mold base 110 to the lowest point, it begins to move upward. At this time, the cylinder controlled by the solenoid valve is in the first punching position, pushing the movable push block 31 and the movable clamping block 32 to push the semi-finished product to the right. After pushing 1.0MM, the first push block 60 slides backward under the action of the movable push block 31. The movable clamping block 32 firmly clamps the semi-finished product under the tension of the first spring 33. The cylinder continues to push the semi-finished product forward. During the process of pushing to 23.0MM, due to the limiting effect of the limit block 100, the movable clamping block 32 and the movable push block 31 always maintain the state of clamping the semi-finished product. During the 2.0mm process from 23.0mm to the final forming position of 25.0mm (second punching position), the second push block 70, under the pressure of the second spring 240, begins to push open the movable latch block 32 with the connecting pin 80 as the center, allowing the movable latch block 32 to open smoothly at an angle of about 1.5 degrees, with an opening gap of about 0.35mm. At this time, the semi-finished product is released and falls onto the forming insert 40. The mold continues to move upward, and the cylinder controlled by the solenoid valve drives the movable push block 31 and the movable latch block 32 to begin retracting towards the first punching position, ready to receive the next punched semi-finished product. When the mold moves upward to the initial position, one punch is completed. At this time, the strip is fed forward by 18.0mm under the action of the punch press feeder. The mold moves downward again to the lowest point, and the forming punch completes the punching and forming of the semi-finished product at the second punching position, thus obtaining the product. At the same time, another semi-finished product is punched out at the first punching position, and the next punch will form another product. As the mold moves upward, the air-blowing pin 170 will blow out airflow, pushing the product from the forming insert 40 to the outside of the mold.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A punching mechanism for punching strip material, characterized in that, The blanking mechanism has a first blanking position and a second blanking position; The punching mechanism includes: The semi-finished product punch is capable of punching the strip of material that has moved to the first punching position to form a semi-finished product; The carrier is capable of receiving the semi-finished product at the first punching position and transporting the semi-finished product to the second punching position; The forming insert is capable of receiving the semi-finished product at the second punching position; The finishing punch, in conjunction with the forming insert, stamps the semi-finished product located in the second punching position to form the finished product; The carrier can be opened at the first and second punching positions to receive and place the semi-finished product. A drive device, which is connected to the carrier in a transmission manner, is used to drive the carrier to move; The carrier includes: a movable push block with a first recess; a movable latch block hinged to the movable push block, the movable latch block having a second recess adapted to the first recess, the first recess and the second recess combining to form a receiving cavity, a top pin being provided in the receiving cavity, the semi-finished product being placed in the receiving cavity and abutting against the top pin; and a first spring, the two ends of which are respectively connected to the movable push block and the movable latch block, for keeping the movable push block and the movable latch block in a fitted state. The blanking mechanism further includes: a first pusher block, which moves and pushes the movable pusher block and the movable locking block to rotate relative to each other when the carrier moves to the first blanking position; and a second pusher block, which moves and pushes the movable pusher block and the movable locking block to rotate relative to each other when the carrier moves to the second blanking position; during the movement of the carrier from the first blanking position to the second blanking position, the movable pusher block and the movable locking block are in contact with each other.

2. The punching mechanism according to claim 1, characterized in that, The movable push block and the movable latch block are connected at one end by a connecting pin, and a notch is formed at the other end of the movable push block and the movable latch block; When the carrier moves to the first punching position, the first push block partially embeds into the notch; When the carrier moves to the second punching position, the second push block partially embeds into the notch.

3. The punching mechanism according to claim 2, characterized in that, The first push block is disposed on one side of the carrier, and a limit block is disposed on the other side of the carrier. The limit block is used to restrict the relative rotation of the movable locking block and the movable push block during the movement of the carrier. The movable locking block is provided with a groove. When the carrier moves to the second punching position, the limiting block is partially in the groove, and the movable locking block and the movable push block can rotate relative to each other.

4. The blanking mechanism according to claim 1, characterized in that, The bottom of both the first push block and the second push block is provided with a second spring. When the carrier moves to the first punching position and the second punching position, the second spring is in the unfolded state. When the carrier leaves the first punching position and the second punching position, the second spring switches from the unfolded state to the compressed state.

5. A punching die, characterized in that, include: Upper mold base; Lower mold base; And the punching mechanism as described in any one of claims 1 to 4, wherein the semi-finished punch and the finished punch are disposed on the upper die base, and the carrier and the forming insert are disposed on the lower die base.

6. A blanking method using the blanking die as described in claim 5, characterized in that, include: S100: Convey the strip to the first punching position; S200: The carrier moves to the first punching position and is below the strip. The semi-finished product punch punches the strip at the first punching position to form a semi-finished product, which falls onto the carrier. S300: The carrier transports the semi-finished product from the first blanking position to the second blanking position and drops it from the carrier onto the forming insert; S400: The finished product punch presses the semi-finished product to form the finished product.

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