CN209902028U - Fine blanking die - Google Patents

Abstract

The utility model provides a fine blanking mould that long service life, product defective rate are low, it includes mould and lower mould, goes up the mould and connects in the lower mould, goes up the mould and includes upper cover plate, upper die base, upper padding plate, punch holder and the upper stripper plate that connects according to the preface, and the lower mould includes die holder, lower bolster, lower plate and backplate. The fine blanking die of the utility model cuts the plate into the workpiece through the matching of the male die and the female die, has simple operation, accurate and reliable processing process, adopts the compressed air as the power and has low production cost; the size and the self weight of the die are small, the workpiece is extruded and cut by utilizing the upper die and the lower die, the damage to the workpiece is small, and the reject ratio of the product is low; the single mold opening and closing period of the mold can be shortened by adjusting the stroke of the air pump, and the production efficiency of the mold is improved; the movable plate is elastically connected with the lower clamping plate, so that the vibration of the die is small during die assembly, and the service life is long; through preprocessing and twice molding, burrs on the section of the workpiece are reduced, and the surface roughness of the product is reduced.

Description

Fine blanking die

Technical Field

The utility model relates to the technical field of dies, specifically, relate to a fine blanking die.

Background

In modern society, the widespread use of electronic devices has greatly shortened the distance between people, made various information accessible, and prompted the continuous forward development of various industries. However, during the use process, due to the energy loss and the limitation of materials during the driving process of the device, heat inevitably exists inside the electronic product, so that the heat needs to be conducted and dissipated through the heat sink to achieve the purpose of protecting the internal components of the electronic device. Under the conditions of various electronic products and huge demand, how to emerge in the market becomes a problem to be solved urgently by current radiator manufacturers.

At present, three modes of CNC (computer numerical control), automatic lathe and punching machine machining are mainly adopted for radiator production, and due to the fact that the size of a radiating fin is small, when the CNC and automatic lathe machining is adopted, the problems that positioning is difficult, cutting precision of a cutter is difficult to control and the like exist, and production cost is high; in addition, when the punching machine is used for processing, because the tonnage of the punching machine is larger, the impact force on the workpiece is large in the processing process, the workpiece can be greatly damaged, and the reject ratio of the product is high; meanwhile, the single die opening and closing action period of the punching machine is longer, fewer products can be processed in unit time, and the production efficiency is not high; in the working process of the punching machine, the equipment shakes greatly due to the die opening and closing actions of the upper die and the lower die, the punching machine shakes continuously to loosen all parts of the equipment, and the service life of the punching machine is short; in addition, one-time stamping forming is adopted in the machining process, burrs are more on the section of the workpiece, the surface is uneven, and the use and matching requirements of products are difficult to meet.

SUMMERY OF THE UTILITY MODEL

To the technical problem that the mould life that prior art exists is short and the product defective rate is high, the utility model provides a fine blanking mould.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a fine blanking die comprises an upper die and a lower die, wherein the upper die is connected with the lower die and an external air pump, the upper die comprises an upper cover plate, an upper die base, an upper padding plate, an upper clamping plate and an upper stripper plate which are sequentially connected in a stacked mode, an air hole communicated with the air pump is formed in the upper cover plate, the upper die base is fixed on the upper cover plate and is provided with two first grooves, the first grooves are provided with through grooves corresponding to the air hole and penetrating through the upper die base, the air hole and the through grooves form an air inlet channel, the upper padding plate is provided with second grooves corresponding to the first grooves, the first grooves and the second grooves form an air transmission chamber, springs are arranged in the air transmission chamber, one ends of the springs are connected to the upper cover plate, the other ends of the springs are connected to the upper padding plate, and the upper stripper; the lower mould includes lower bolster, lower splint and the backplate of connecting according to the preface range upon range of, and wherein, the lower bolster sets up in the operation panel, and the backplate comprises solid fixed die board and the fly leaf that sets up in the solid fixed die board both sides, and solid fixed die board passes through bolted connection in the lower splint, and fly leaf elastic connection is in the lower splint, and solid fixed die board has the trapezoidal platform form recess that corresponds the trapezoidal platform mould and corresponds the die of terrace die, and two fly leaves respectively have one row of locating pin, and the locating pin sets up along panel moving direction.

Furthermore, the upper clamping plate is provided with a stripping rod, the stripping rod is elastically connected to the surface of the upper clamping plate, and a ladder platform die of the upper stripping plate is provided with a stripping hole corresponding to the stripping rod.

Further, the upper stripper plate is provided with two male dies which are arranged in sequence.

Furthermore, the upper backing plate, the upper clamping plate and the upper stripper plate are respectively provided with a first guide groove, a second guide groove and a third guide groove, and the first guide groove, the second guide groove and the third guide groove are communicated to form a guide channel.

Furthermore, the lower clamping plate is provided with a guide pillar, the movable plate of the back plate is provided with a fourth guide groove, and the guide pillar penetrates through the fourth guide groove and is inserted into the guide channel.

Further, the locating pin includes round pin body and bayonet socket, and the face in the fly leaf is connected to the round pin body, and the bayonet socket sets up in the side of round pin body and corresponding panel.

Furthermore, two ends of the positioning pin are respectively provided with a positioning stud.

Furthermore, the upper stripper plate is provided with a pin hole corresponding to the positioning pin.

According to the fine blanking die, the workpiece is formed by punching and cutting the plate through the matching of the male die and the female die, the positioning of the workpiece can be realized and the machining precision can be ensured only by fixing and machining the plate and aligning the male die and the female die, the machining process is accurate and reliable, compressed air is used as power, and the production cost is greatly saved; the size of the die is small, the self weight is small, the workpiece is extruded and cut by the upper die and the lower die in the production process, the damage to the workpiece is small, and the reject ratio of the product is reduced; the single mold opening and closing period of the mold can be shortened by adjusting the stroke of the air pump, the distance between the upper mold and the lower mold is smaller during mold opening, the number of processed products in unit time is increased, and the working efficiency of the mold is improved; the movable plate is elastically connected with the lower clamping plate, so that the vibration of the mold is small during mold closing, and the service life of the mold is long; through preprocessing and twice forming, the workpiece section is cut twice, so that burrs on the workpiece section are reduced, and the surface roughness of a product is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural view of a fine blanking die according to an embodiment;

FIG. 2 is a schematic cross-sectional view of a fine blanking die in the embodiment shown in FIG. 1;

FIG. 3 is a schematic diagram of the construction of the upper die in one embodiment;

FIG. 4 is a schematic diagram of the structure of the upper die base in one embodiment;

FIG. 5 is a schematic diagram of the construction of an upper backing plate in one embodiment;

FIG. 6 is a schematic view of the upper jaw in one embodiment;

FIG. 7 is a schematic diagram of the structure of an upper stripper plate in one embodiment;

FIG. 8 is a schematic illustration of a workpiece structure according to one embodiment;

FIG. 9 is a schematic view of the structure of the lower mold in one embodiment;

FIG. 10 is a schematic diagram of a backplate according to one embodiment.

Detailed Description

Embodiments of the invention are illustrated in the drawings and, for purposes of clarity, numerous implementation details are set forth in the following description. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that all the directional indicators in the embodiments of the present invention, such as upper, lower, left, right, front and rear … …, are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for description purposes, not specifically referring to the order or sequence, and are not intended to limit the present invention, but only to distinguish the components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments can be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or can not be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a fine blanking die, it relates to mould technical field for the fin of processing radiator, in order to guarantee the normal use of electronic product. Please refer to fig. 1 and fig. 2 together, the fine blanking die of the present invention includes an upper die 10 and a lower die 20, the upper die 10 is connected to the mechanical arm of the external operating platform, the lower die 20 is fixed on the operating platform, the upper die 10 is further connected to the air pump of the mechanical arm and is driven by the air pump to periodically approach or keep away from the lower die 20, so as to complete the die closing and opening actions of the die. Through the connection cooperation of the upper die 10 and the lower die 20, the die punches the plate placed on the lower die 20, a product with a preset shape is processed on the plate, and simultaneously, through the punching action of the upper die 10, the formed product is separated from the plate, so that the formed product is separated. In the embodiment, the air pump is used for realizing die opening and closing of the die, the stroke of the air pump can be adjusted in the operation process to shorten the single die opening and closing period of the die, the number of processed products in the unit time of the die is increased, and the production efficiency of the die is improved.

Referring to fig. 3, the upper mold 10 includes an upper cover plate 11, an upper mold base 12, an upper cushion plate 13, an upper clamp plate 14 and an upper stripper plate 15, which are stacked and connected in sequence. It should be noted that the upper cover plate 11 provides a support for the fixed connection of the remaining plate layers of the upper die 10, so as to ensure the stability of the upper die 10. The upper cover plate 11 is connected to an air pump, and is used for guiding compressed air of the air pump into the upper die 10 to drive the upper die 10 to periodically approach or depart from the lower die 20, so as to realize die opening and die closing of the die. The upper cover 11 has an air hole 111 communicating with an air pump, which penetrates the upper cover 11 and guides compressed air into the upper mold 10. Referring to fig. 4 and 5, the upper die base 12 is fixed to the upper cover plate 11, the upper die base 12 is provided with two first grooves 121, the first grooves 121 are provided with through grooves corresponding to the air holes and penetrating through the upper die base 12, the air holes and the through grooves form an air inlet passage, the upper backing plate 13 is provided with second grooves 131 corresponding to the first grooves 121, and the first grooves 121 and the second grooves 131 form an air transmission chamber. Therefore, the compressed air which is generated by the air pump and changes periodically enters the air transmission chamber through the air inlet channel, when the air pump introduces the compressed air into the air inlet channel, the compressed air generates pressure on the air transmission chamber, namely the compressed air generates pressure on the upper backing plate 13, the compressed air pushes the upper backing plate 13 to move towards the direction close to the lower die 20, and in the process, the upper backing plate 13 drives the upper clamping plate 14 and the upper stripper plate to move towards the upper die base 12, so that the die assembly of the die is realized; when the air pump sucks air, the air pressure in the air inlet channel and the air transmission chamber is gradually reduced until the air pressure is smaller than the air pressure outside the die, at the moment, the upper padding plate 13 is gradually close to the upper die base 12 under the negative pressure, and drives the upper clamping plate 14 and the upper stripping plate to move towards the upper die base 12, so that the die assembly operation of the die is realized, and the die is convenient for stamping plates. In this embodiment, a compression spring 122 is disposed in the air transmission chamber, the compression spring 122 is disposed in the through groove, one end of the compression spring 122 is connected to the upper cover plate 11, and the other end of the compression spring 122 is connected to the upper backing plate 13, so as to achieve elastic connection among the upper cover plate 11, the upper mold base 12 and the upper backing plate 13. When compressed air enters the air transmission chamber through the through groove through the air hole, the pressure in the air transmission chamber is increased, the acting force of the compressed air on the compression spring 122 is also increased, at the moment, the compression spring 122 is stressed to deform and stretch, the upper backing plate 13 connected with the compression spring is pushed to move towards the lower die 20, and the upper backing plate 13 drives the upper clamping plate 14 and the upper stripper plate 15 to press the plate placed on the lower die 20 when moving, so that the plate is blanked. When the air pump discharges air, the air pressure in the air inlet channel is reduced, the pressure difference exists between the air inlet channel and the air transmission chamber, at this time, the compression spring 122 recovers deformation under negative pressure and drives the upper backing plate 13, the upper clamping plate 14 and the upper stripper plate 15 to move towards the upper die base 12 until the upper backing plate 13 abuts against the upper die base 12, and the compression spring 122 is in a free state, so that one die opening and closing action of the die is completed.

Referring to fig. 6, 7 and 8, the upper stripper plate 15 has a pre-processing die 151, a step die 152 and a male die 153 arranged in sequence, and the workpiece 30 has a step-shaped concave 31. In the punching process, the upper stripper plate 15 presses the plate and punches a predetermined shape on the plate, the pre-processing die 151 presses the outline of the workpiece 30 on the plate, the step die 152 processes the concave 31 of the workpiece 30, and the punch 153 punches the workpiece 30. In order to reduce burrs at the cross section of the workpiece 30 and reduce the surface roughness of the cross section of the workpiece, in the present embodiment, the upper stripper plate 15 has two punches 153 arranged in sequence. The plate is blanked by the two male dies 153 successively, the appearance of the workpiece 30 is processed on the plate during the primary blanking, the workpiece 30 is not completely separated from the plate at the moment, and during the secondary blanking, the male dies 153 press the workpiece 30 to move downwards and enable the section of the workpiece 30 to generate friction with the plate cutting position. Because the workpiece 30 is separated from the raw material of the plate material through the punching operation, the section of the workpiece 30 and the cut part of the plate material have more burrs and larger surface roughness, and when the workpiece 30 and the raw material of the plate material are contacted, the cut part of the plate material polishes the section of the workpiece 30 to remove the convex peaks on the section of the workpiece 30, so that the surface roughness on the section of the workpiece 30 is reduced, and the use of the workpiece 30 is facilitated. The upper backing plate 13, the upper clamping plate 14 and the upper stripper plate 15 are respectively provided with a first guide groove 132, a second guide groove 141 and a third guide groove 154, the first guide groove 132, the second guide groove 141 and the third guide groove 154 are communicated to form a guide channel, accurate positioning of the upper die 10 and the lower die 20 during connection is realized by arranging the guide channel, and consistency of products processed by the pre-processing die 151, the step die 152 and the male die 153 is ensured.

In order to prevent the plate material from adhering to the upper stripper plate 15 during the stamping process and affecting the normal operation of the stamping operation, in this embodiment, the upper clamping plate 14 has a stripper bar 142, the stripper bar 142 is elastically connected to the surface of the upper clamping plate 14, and the step form 152 of the upper stripper plate 15 has a stripper hole 1521 corresponding to the stripper bar 142. In the mold closing process, the upper backing plate 13 drives the upper clamping plate 14 and the upper stripper plate 15 to move towards the lower mold 20 under the pushing of the compression spring 122 until the upper stripper plate 15 compresses the plate, and the stripper bar 142 tightly supports the plate at the moment to prevent the plate from being adhered to the upper stripper plate 15; in the process of opening the die, the compression spring 122 recovers deformation and drives the upper backing plate 13, the upper clamping plate 14 and the upper stripper plate 15 to move towards the upper die base 12, and because the stripper rod 142 is elastically connected with the surface of the upper clamping plate 14, when the upper die 10 leaves the lower die 20, the stripper rod 142 recovers deformation time delay under the action of inertia, so that the length of the stripper rod 142 exposed out of the stripper hole 1521 is increased, and then the plate is pushed, and the plate is separated from the upper stripper plate 15.

Referring to fig. 9, the lower mold 20 includes a lower mold base 21, a lower backing plate 22, a lower clamping plate 23 and a back plate 24, which are sequentially stacked and connected. It should be noted that the lower die base 21 provides support for the lower backing plate 22, the lower clamping plate 23, the back plate 24 and other plate layers, and the bottom area and the self weight of the lower die base are large, so that the stability of the lower die 20 is ensured. The lower die holder 21 is arranged on the operating platform, so that an operator can fix and adjust the lower die 20 conveniently.

Referring to fig. 10, the back plate 24 is composed of a fixed template 241 and movable plates 242 disposed at two sides of the fixed template 241, the fixed template 241 is connected to the lower plate 23 through bolts, the movable plates 242 are elastically connected to the lower plate 23, and specifically, the movable plates 242 are connected to the lower plate 23 through springs. When the mold is opened, the elastic force of the spring is balanced with the gravity of the movable plate 242, and the movable plate 242 is lifted by the spring so that the height of the movable plate 242 is consistent with that of the fixed mold plate 241; when the upper die 10 presses the lower die 20, the upper stripper plate 15 presses the back plate 24, the spring compresses under the pressure of the upper stripper plate 15 and drives the movable plate 242 to move in the direction of the lower die holder 21, so that the upper stripper plate 15 presses the plate on the fixed die plate 241 and performs stamping processing on the plate; after the plate is stamped, the upper stripper plate 15 leaves the fixed die plate 241, and the spring recovers elastic deformation and drives the movable plate 242 to return to the initial position, thereby completing one stamping operation. Through making fly leaf 242 elastic connection in lower plate 23, reduced the impact force of mould 10 to lower mould 20 during mould punching operation, the most kinetic energy storage becomes elastic potential energy in the spring when going up stripper 15 and pressing to backplate 24, and when the mould is opened, elastic potential energy releases to reduce the tremble of mould and the impact force between mould 10 and the lower mould 20, prolonged the life of mould.

The fixed die plate 241 has a terrace-shaped groove 2411 corresponding to the terrace die 152 and a female die 2412 corresponding to the male die 153. In the stamping process, a plate is arranged on the surface of the fixed template 241 and covers the step-shaped groove 2411 and the female die 2412, during die assembly, the step die 152 of the upper stripper plate 15 presses the step-shaped groove 2411, the step-shaped groove 31 of the workpiece 30 is machined on the surface of the plate, the male die 153 of the upper stripper plate 15 presses the female die 2412, the outer contour of the workpiece 30 is punched on the plate, and the stamping forming of the workpiece 30 is realized through the matching of the step die 152 and the step-shaped groove 2411 and the matching of the male die 153 and the female die 2412. The two movable plates 242 are respectively provided with a row of positioning pins 2421, and the positioning pins 2421 are arranged along the moving direction of the plate and used for clamping the plate and positioning the moving plate on the back plate 24, so that the inconsistency of processed products caused by the vertical shaking of the plate is prevented, and the product quality is ensured. Positioning pin 2421 includes pin body 24211 and bayonet 24212, pin body 24211 is connected to the face of movable plate 242, guarantees the stability of positioning pin 2421, is convenient for pinpoint the panel, and bayonet 24212 sets up in pin body 24211 and corresponds the side of panel, is used for restraining the panel, prevents that the panel from coming off from positioning pin 2421, causes the panel location to lose efficacy to influence product quality.

In order to prevent the sheet material from moving laterally when moving along positioning pins 2421, and ensure the consistency of the formed product, in this embodiment, positioning studs 2422 are respectively disposed at two ends of the positioning pins 2421. When the plate moves to the back plate 24, the plate firstly enters the bayonets 24212 of the positioning pins 2421 through the positioning studs 2422 to realize the positioning of the plate on the plane parallel to the fixed template 241, and the plate is prevented from moving laterally in the moving process through the restriction of the positioning studs 2422, so that the quality of a formed product is different.

In order to achieve the accurate connection between the upper mold 10 and the lower mold 20 and ensure the consistency of the punched product, in the embodiment, the lower clamp 23 is provided with the guide post 25, the movable plate 242 of the back plate 24 is provided with the fourth guide groove 2423, and the guide post 25 penetrates through the fourth guide groove 2423 and is exposed on the movable plate 242. In this embodiment, the shape and structure of the guide post 25 are matched with the shape and structure of the guide channel. During die assembly, the guide post 25 is inserted into the guide channel, so that the matched connection and accurate positioning of the upper die 10 and the lower die 20 are realized, the matched position of the upper die 10 and the lower die 20 is unchanged during each die opening and die assembly action, the consistency of products processed on the plate by the upper die 10 and the lower die 20 is further ensured, and the product reject ratio is reduced.

In order to prevent positioning pins 2421 from impacting upper stripper plate 15 when upper die 10 is mated with lower die 20, which may cause the die to vibrate and shorten the service life of the die, in the present embodiment, upper stripper plate 15 has pin holes 155 corresponding to positioning pins 2421. In the mold closing process, the upper mold 10 presses the lower mold 20, the upper stripper plate 15 abuts against the fixed mold plate 241, the positioning pins 2421 on the movable plate 242 are inserted into the pin holes 155, the positioning pins 2421 are prevented from impacting the upper stripper plate 15, and meanwhile, the guiding function is achieved, and the upper mold 10 and the lower mold 20 are accurately positioned.

The utility model discloses a function mode does, after the starting power supply, the conveyer belt moves under motor drive and conveys panel to the backplate 24 of lower mould 20, and when panel and backplate 24 contacted, panel got into locating pin 2421 under locating stud 2422's restraint, realized the location of panel. Meanwhile, the air pump is started, the air pump sends compressed air into the upper die 10 through the air holes of the upper cover plate 11, the pressure in the air transmission chamber is increased, the pressure of the compressed air on the upper backing plate 13 and the compression spring 122 is gradually increased, and at the moment, the compression spring 122 is stressed to deform and stretch, and the compression spring and the upper backing plate 13 jointly act on the upper backing plate 13 and drive the upper backing plate 13 to move towards the lower die 20. When the upper backing plate 13 moves, the upper clamping plate 14 and the upper stripper plate 15 are driven to press against the plate on the back plate 24, the movable plate 242 moves towards the lower die holder 21 under the action of the upper die 10, and the fixed die plate 241 is exposed, so that the upper stripper plate 15 presses the fixed die plate 241. The preliminary working die 151 of the upper stripper plate 15 presses the plate material to work the approximate contour of the workpiece 30 on the plate material, and the step die 152 and the punch 153 of the upper stripper plate 15 press the plate material to work the step-like recess 31 of the workpiece 30 on the plate material to punch out the outer contour of the workpiece 30. After the outer contour of the workpiece 30 is machined, the air pump discharges air, the air pressure in the air inlet channel is reduced, and a pressure difference exists between the air inlet channel and the air transmission chamber, so that the compression spring 122 recovers deformation under negative pressure and drives the upper backing plate 13, the upper clamping plate 14 and the upper stripper plate 15 to move towards the upper die base 12 until the upper backing plate 13 abuts against the upper die base 12, and the compression spring 122 is in a free state. In the process, the elastic member connected to the stripping rod 142 recovers the deformation time delay under the inertia effect, the length of the stripping rod 142 exposed out of the stripping hole 1521 is increased, the stripping rod 142 pushes the plate, the plate is separated from the upper stripping plate 15, and the plate is prevented from falling off from the positioning pin 2421, so that the production operation is influenced. After the upper die 10 leaves the lower die 20, the constraint of the upper stripper plate 15 on the movable plate 242 is eliminated, and at this time, the spring recovers elastic deformation and drives the movable plate 242 to return to the initial position, so that the impact force of the upper die 10 on the lower die 20 is buffered in the next die closing process, and thus, one die opening and closing operation of the die is completed.

To sum up, in one or more embodiments of the present invention, the fine blanking die of the present invention cuts the plate to form the workpiece by matching the male die and the female die, only needs to fix the plate to be processed, and aligns the male die and the female die to position the workpiece and ensure the processing precision, the processing process is accurate and reliable, and the compressed air is used as the power, thereby greatly saving the production cost; the size of the die is small, the self weight is small, the workpiece is extruded and cut by the upper die and the lower die in the production process, the damage to the workpiece is small, and the reject ratio of the product is reduced; the single mold opening and closing period of the mold can be shortened by adjusting the stroke of the air pump, the distance between the upper mold and the lower mold is smaller during mold opening, and the number of processed products in unit time is increased; the movable plate is elastically connected with the lower clamping plate, so that the vibration of the mold is small during mold closing, and the service life of the mold is long; through preprocessing and twice forming, the workpiece section is cut twice, so that burrs on the workpiece section are reduced, and the surface roughness of a product is reduced.

The above description is only for the embodiment of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (8)

1. A fine blanking die is characterized by comprising an upper die and a lower die, wherein the upper die is connected with the lower die and an external air pump, the upper die comprises an upper cover plate, an upper die base, an upper padding plate, an upper clamping plate and an upper stripper plate which are sequentially connected in a stacking manner, an air hole communicated with the air pump is formed in the upper cover plate, the upper die base is fixed on the upper cover plate, the upper die base is provided with two first grooves, each first groove is provided with a through groove corresponding to the air hole and penetrating through the upper die base, the air hole and the through groove form an air inlet channel, the upper padding plate is provided with a second groove corresponding to the first grooves, the first grooves and the second grooves form an air transmission chamber, a spring is arranged in the air transmission chamber, one end of the spring is connected with the upper cover plate, the other end of the spring is connected; the lower mould includes lower bolster, lower splint and the backplate of connecting according to the preface range upon range of, and wherein, the lower bolster sets up in the operation panel, and the backplate comprises solid fixed die board and the fly leaf that sets up in the solid fixed die board both sides, and solid fixed die board passes through bolted connection in the lower splint, and fly leaf elastic connection is in the lower splint, and solid fixed die board has the trapezoidal platform form recess that corresponds the trapezoidal platform mould and corresponds the die of terrace die, and two fly leaves respectively have one row of locating pin, and the locating pin sets up along panel moving direction.

2. The fine blanking die set forth in claim 1 wherein the upper clamping plate has a stripper bar resiliently attached to the plate surface of the upper clamping plate, and the stepped die of the upper stripper plate has stripper holes corresponding to the stripper bar.

3. The fine blanking die of claim 1 wherein the upper stripper plate has two punches arranged in series.

4. The fine blanking die set forth in claim 1 wherein the upper backing plate, the upper clamping plate and the upper stripper plate have a first guide groove, a second guide groove and a third guide groove, respectively, the first guide groove, the second guide groove and the third guide groove being in communication to form a guide passage.

5. The fine blanking die of claim 4 wherein the lower plate is provided with a guide post, the movable plate of the back plate is provided with a fourth guide groove, and the guide post passes through the fourth guide groove and is inserted into the guide passage.

6. The fine blanking die of claim 1 wherein the locating pin includes a pin body and a bayonet, the pin body is connected to the plate surface of the movable plate, and the bayonet is disposed on the pin body and corresponds to the side surface of the plate.

7. The fine blanking die of claim 1 wherein each end of the locating pin is provided with a locating stud.

8. The fine blanking die of claim 1 wherein the upper stripper plate has pin holes corresponding to the locating pins.

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